Wireless communication system, and device and method in wireless communication system.

WIRELESS COMMUNICATION SYSTEM, AND DEVICE AND METHOD IN

THE WIRELESS COMMUNICATION SYSTEM

FIELD OF THE INVENTION [0001] The present description refers to the field of wireless communication technology, and in particular to a wireless communication system and a device and a method in the wireless communication system, which implements a scheme of channel estimation and two-phase feedback and a preliminary scheme

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<td></td><td></td><td>BACKGROUND OF</td><td>THE INVENTION</td><td></td><td></td>

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academy and industry in recent years. The desk study shows that the massive MIMO system can significantly improve the spectrum efficiency and energy efficiency of the system with simple linear detection and pre-coding algorithms, for example, Zero Force ZF algorithm), Minimum Mean Square Error algorithm ( MMSE) and the like, therefore, massive MIMO is likely to be adopted as the key technology for a new generation communication standard.

[0003]

In one topic, one of the problems to be solved in mass MIMO technology. In the theoretical study of massive MIMO, it is generally assumed that a base station adopts a linear arrangement with a uniform spacing, that is, the antennas are placed only in a horizontal direction. In the event that the number of antennas is large, the linear order will result in a base station antenna scale being too large and difficult to perform. One of the solutions to the problem is to adopt a 3D-MIMO system in which antennas are placed in both a horizontal and a vertical direction. For the 3D-MIMO system, degrees of freedom (relative to the number of antennas in the horizontal direction and the vertical direction / in both the horizontal and vertical directions) can be used, thus effectively reducing the scale of the antenna system. In addition, an extra degree of freedom in the vertical direction can be used to weaken interference between users and reduce interference between cells, etc., and hence system performance can be improved to some degree. Due to few advantages, 3D-MIMO technology draws the attention of the industry, and is likely to be incorporated into the existing wireless communication standard.

[0004] Since user equipment has limited response accuracy or feedback, exact channel status information cannot be obtained using existing channel estimation and feedback schemes, and system performance cannot be effectively improved.

BRIEF DESCRIPTION OF THE INVENTION [0005] Next, a brief summary of the description will be given to provide a basic understanding of some aspects of the description. However, it will be appreciated that this summary is not exhaustively descriptive of the description nor. It is intended to define essential or important components or the scope of the description, but simply to present '10 some concepts of the description in a simplified form and hereby act as a preamble to more detailed descriptions to be presented later.

[00061 In view of the above problems, an objective of the present description is to provide a wireless communication system and a device and a method in the wireless communication system, which implement a two-phase feedback and channel estimation scheme and a corresponding pre-coding scheme, which is adapted to an antenna system, improves the performance of the system and reduces the complexity of operation.

[0007] According to an aspect of the present description, a device is provided in a wireless communication system, which includes: a first generation unit configured to generate a first matrix of pre-coding according to first information of the channel in a channel between a first communication apparatus and a second communication apparatus;

and a second generation unit configured to generate a second pre-agreement matrix, the first pre-matrix and the second read channel;

a pre-encoding unit configured to pre-encode a data signal according to the first pre-encoding matrix and the second pre-encoding matrix.

[0008] According to another aspect of the present description, a method is also provided in a wireless communication system, which includes: a first generation step to generate a first precoding matrix according to the first channel information in a channel between a first communication apparatus and a second communication apparatus; a second generation step to generate a second pre-coding matrix according to the first pre-coding matrix and second channel information on the channel; and a pre-coding step to pre-code a data signal according to the first pre-coding matrix and the second pre-coding matrix.

[0009] According to one aspect of the present description, a device is further provided in a wireless communication system, which includes circuits configured to:

providing the first channel information on a channel between a first communication apparatus and a

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second communication apparatus for the first communication apparatus that generates a first pre-coding matrix according to the first channel information; report the second channel information on the channel for the first communication device that generates a second matrix of pre

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encoding and the second pre-encoding matrix.

[0010] According to another aspect of the present description, a method is further provided in a wireless communication system, which includes: reporting the first channel information on a channel between a first communication apparatus and a second communication apparatus for the first communication apparatus that generates a first pre-coding matrix according to the first channel information; reporting the second channel information on the channel for the first communication apparatus that generates a second pre-coding matrix according to the first pre-coding matrix and the second channel information; and acquiring a data signal pre-encoded by the first communication apparatus according to the first pre-encoding matrix and the second pre-encoding matrix.

[0011] According to another aspect of the present description, a device is further provided in a wireless communication system, which includes: a channel information acquisition unit configured to acquire the first channel information in a channel between a first communication apparatus and a second communication apparatus; a pre-coding unit configured to pre-code a first reference signal based on the first channel information; a measurement configuration information generating unit configured to generate measurement configuration information for the second communication apparatus, the measurement configuration information including a measurement indication of the first pre-coded reference signal; and a control unit configured to control data signal transmission based on the second channel information, which is fed back to the first reference signal pre-encoded by the second communication apparatus according to the configuration information measurement.

[0012] In accordance with a preferred embodiment of the present disclosure, the pre-coding unit may further be configured to pre-code the first reference signal based on further channel information related to another communication apparatus.

[0013] In accordance with a preferred embodiment of the present disclosure, the control unit may further be configured to control data signal transmission further based on the channel information related to another communication apparatus.

[0014] According to a preferred embodiment of the present description, the channel information acquisition unit can be configured to acquire the first channel information from multiple second communication apparatuses, and the device can further include: a determination unit configured to determine, based on the first information or the cache channel one of the multiple second communication devices, whether the first communication device is sent to the first precoded reference signal to a corresponding second communication device. Preferably, the pre-coding unit may further be configured to pre-code, based on a determination result from the determining unit, the first reference signal of the first channel information of one or more of the multiple seconds. communication devices.

[0015] According to a preferred embodiment of the present description, the pre-coding unit can be configured to calculate, the first channel information of one or more of the multiple second communication devices, pre-coding matrices of the corresponding second communication devices, and precoding the first reference signal using the superposition of the pre-coding matrices.

[0016] According to a preferred embodiment of the present description, the pre-coding unit can be configured to change the first channel information to one or more of the multiple second communication devices, the pre-coding matrices of the corresponding second communication apparatuses, and pre10 encoding the first reference signal using the pre-encoding matrices respectively. Preferably, the device can be configured to assign different codewords, time or frequency resources to the first reference signal from one or more of the multiple 15 second communication devices to perform multiplexing.

[0017] According to a preferred embodiment of the present description, the device may further include: a configured radio resource allocation unit 20 to allocate, based on the first channel information, radio resources for the transmission of the first signal pre-encoded reference or data signal.

[0018] According to a preferred embodiment of the present description, the channel information acquisition unit 25 can be further configured to acquire the feedback information of a second reference signal from the second communication apparatus as the first information of the channel.

[0019] According to one. In the preferred embodiment of the present disclosure, the second reference signal may be transmitted only on a portion of the antennas in an antenna system of the first communication apparatus.

[0020] In accordance with a preferred embodiment of the present disclosure, the device may further include: a beamforming unit configured to perform static / semi-static beamforming on the second reference signal. Preferably, the channel information acquisition unit may further be configured to acquire feedback information from the second beam-shaped reference signal of the second communication apparatus as the first channel information.

[0021] In accordance with a preferred embodiment of the present disclosure, the first reference signal may be a narrowband signal, and the second reference signal 20 may be a broadband signal.

[0022] According to a preferred embodiment of the present description, a transmission cycle of the first reference signal may be shorter than that of the second reference signal.

[0023] According to a preferred embodiment of the present description,

U Π1Q 8 of channel information acquisition can be further configured to acquire the first channel information when estimating the channel according to a third reference signal from the second communication apparatus.

[0024] According to a preferred embodiment of the present description, the third reference signal may be an uplink sound reference signal.

[0025] According to a preferred embodiment of the present description, the first communication apparatus may be a base station, the second communication apparatus may be user equipment, the device may be located at the end of the base station, and The device may further include: a transmit-receive unit configured to perform signal transmit-receive between the base station and user equipment.

[0026] According to a preferred embodiment of the present description, the first channel information can be the channel information in a first dimensional direction, and the second channel information can be the channel information in a second dimensional direction.

[0027]

According to a preferred embodiment of the present description, the first dimensional direction can be a height direction, and the second dimensional direction can be an angular direction.

[0G28] According to a preferred embodiment of the present description, the first dimensional direction can be an angular direction, and the second dimensional direction can be a height direction.

[0029] According to a preferred embodiment of the present description, the first channel information can be the preliminary information on the channel, and the second channel information can be additional information on the channel.

[0030: In accordance with another aspect of the present description, a device is further provided in a wireless communication system, including: a measurement unit configured to measure, based on the measurement configuration information, a second communication apparatus of a first communication apparatus, a pre-encoded first reference signal of the first communication apparatus, the measurement configuration information which hears a measurement indication of the first pre-coded reference signal; and a feedback information generation unit configured to generate, based on the measurement of the first precoded reference signal, the feedback information as the second channel information in a channel between the first communication apparatus and the second communication device, from the first communication device

QS.l 8 control the data signal transmission.

[0031] According to another aspect of the present description, a wireless communication system is further provided, which includes: a first communication apparatus configured to acquire the first channel information on a channel between the first communication apparatus and a second communication apparatus, pre-encode a first reference signal based on the first channel information, generate the information measurement configuration for the second communication device, the measurement configuration information including a measurement indication for the first pre-coded reference signal, and controlling the transmission of the data signal based on the second channel information, which is fed back to the first pre-reference signal -coded by the second measurement configuration communication apparatus;

communication configured for pre-coded reference in measurement configuration, according to the information of and the second apparatus of: measuring the first signal based on the information of and generating feedback information based on the measurement of the first reference signal pre -coded as the second information of [0032] According to another aspect of the present description, a method is also provided in a wireless communication system, which includes: a channel information acquisition step for acquiring the first channel information on a channel between a first communication apparatus and a second communication apparatus; a pre-coding step to pre-code a first reference signal based on the first channel information; a measurement configuration information generation step for generating measurement configuration information for the second communication apparatus, the measurement configuration information including a measurement indication for the first pre-coded reference signal; and a control stage to control the transmission of the data signal based on the second channel information, which is fed back to the first pre-coded reference signal 15 by the second communication apparatus according to the measurement setup information.

[0033] According to another aspect of the present description, a method is further provided in a wireless communication system, which includes: a measurement step for measuring, based on the measurement configuration information, a second communication apparatus of a first communication apparatus, a first precoded reference signal of the first communication apparatus, the measurement configuration information including a measurement indication for the first pre-coded reference signal; and

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according to the present description described above.

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computer readable storage, in which the computer program codes are recorded to implement the methods of the present description.

[0036] According to the modalities of the present description, in a wireless communication system installed with a massive antenna system, for example, a massive 3D-MIMO system, using a channel estimation and feedback scheme of two phases and a corresponding pre-coding scheme, it is possible to effectively eliminate interference, reduce complexity of operation, and improve overall system performance.

[0037] Other aspects of the modalities of the present description are given in the following parts of the description. In which, a detailed illustration is used to sufficiently describe the preferred embodiments of the embodiments of the present disclosure rather than to limit the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS [00381 The description can be better understood with reference to the detailed description given below in conjunction with the accompanying drawings, throughout which identical or similar reference indicators denote identical or similar components. The accompanying drawings along with the following detailed description are incorporated in and form a part of the specification and serve to further illustrate the preferred embodiments of the description and to explain the principle and advantages of the description by way of example. In the drawings:

[0039] Figure 1 shows a block diagram of an example of functional configuration of a device in a wireless communication system according to an embodiment of the present description;

[0040] Figure 2 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description;

[0041] Figure 3 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description;

[0042] Figure 4 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description;

[0043] Figure 5 shows a. block diagram of another example of functional configuration of a device in a wireless communication system according to another embodiment of the present description;

[0044]

Figure 6 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to another embodiment of the present description;

[0045] Figure 7 shows a block diagram of another example of functional configuration of a device in

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present description;

[0047] Figure 9 shows a schematic diagram of another example of an interaction flow in a wireless communication system according to an embodiment of the present description;

[00481] Figure 10 shows a block diagram of an example of functional configuration of a device in a wireless communication system according to another embodiment of the present description.

[00491] Figure 11 shows a block diagram of an example of functional configuration of a second generating unit in a device according to another embodiment of the present description;

[00501 Figure 12 shows a block diagram of an example> of configuration 1 of a unit with pre-coding in a device according to another embodiment of the present description;

[0051] Figure 13 shows a schematic diagram of an example of an interaction flow in a wireless communication system according to an embodiment of the present description;

[0052] Figure 14 shows a block diagram of

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description;

[0053] Figure 15 shows a flow diagram of a process example of a method in a wireless communication system according to an embodiment of the present description;

[0054] Figure 16 shows a flow diagram of an example of a method process in a wireless communication system according to another embodiment of the present description;

[0055] Figure 17 shows a flow diagram of a process example of a method in a wireless communication system according to another embodiment of the present description;

[0056] Figure 18 is a block diagram of an exemplary structure of a personal computer as an information processing apparatus that can be adopted in an embodiment of the present disclosure;

[0057] Figure 19 is a schematic diagram of an example of distribution of the apparatus in a wireless communication system according to an embodiment of the present description;

[0058] Figure 20 shows a schematic diagram of an example of spectrum efficiency comparison in a wireless communication system to which, conventional technology is applied · and spectrum efficiency in a wireless communication system 25 to which the e comparison technology is applied the [0059] e ~ ¡em¡ omur

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Figure 22 na a configuration diagram technology is a base (eNB) like that of [0061:

The diagram of a sea and of an eNB to which the technology of example can be solved [0062] an diagram shows a configuration of how to apply technology from the

OlSSd &amp; XI ^ CXOlí OÍSA. OS X¿ &amp; JS [0063] Exemplary nodalities of the present disclosure will now be described in conjunction with the accompanying drawings. For reasons of clarity and conciseness, not all aspects of practical implementations are described in the specification. However, it will be appreciated that numerous specific implementation decisions will need to be made during the development of any such practical implementation to achieve the developer's specific goals, for example, to meet all 5 system-related and business constraint conditions, which will vary from one implementation to another. Furthermore, it should also be appreciated that such a development effort could be very complex and time consuming, although it may simply be a routine task for those skilled in the art who benefit from this disclosure.

[0064] Furthermore, it should be noted that only those device structures and / or process steps that are closely relevant to the solutions of the description are illustrated in the drawings, while other less relevant details for the description are omitted so as not to obscure the description due to those unnecessary details.

[0065] Hereinafter, the modalities of the present description are described in detail in conjunction with Figure 1 to Figure 24.

[0066] Before describing the modalities of the present description, a method for estimating the channel and sending a reference signal in a 3D-MIMO system according to conventional technology is briefly presented.

[0067] Currently, in the 3D-MIMO system, a reference signal can generally be sent in the following two methods. A first method is full-space channel precoding. This method requires no extra processing, and each physical antenna port corresponds to a reference signal for channel estimation. A disadvantage of the first method is that it can cause a large overload of reference signals. A second method is a method of sending a reference signal based on a Kronecker product. Specifically, one group of horizontal antennas is selected to send a reference signal to obtain horizontal channel information, then another group of vertical antennas is selected to send a reference signal to obtain vertical channel information, and then orthogonal processing is performed. In horizontal channel information and vertical channel information, a disadvantage of the second method is that: a reception level of the user equipment is low since the reference signal is sent in an omni-directional way1, thus resulting in the low accuracy of the channel estimation.

[0068] In the technology of the present disclosure, it is considered to combine channel feedback information from multiple users and use a two-phase feedback and channel estimation scheme, to effectively increase a level of reception of a reference signal in the end of user equipment, thus obtaining more accurate channel status information and improving system performance.

[0069] Hereinafter a block diagram of an example of functional configuration of a device at the end of the base station in a wireless communication system according to an embodiment of the present description will be described with reference first to Figure one.

[0070] As shown in Figure 1, ur: device

100 according to the example it may include a channel information acquisition unit 102, a precoding unit 104, a measurement configuration information generation unit 106 and a control unit 108. Thereafter, examples of functional configurations of the respective units are respectively described in detail. In some embodiments, the respective 'units' described above can be implemented by one or more processors, without providing separate components.

[0071] The channel information acquisition unit 102 can be configured to acquire the first channel information on a channel between a first communication apparatus and a second communication apparatus.

[0072] Preferably, the first communication apparatus may be a base station, and the second communication apparatus may be user equipment. Here, it should be noted that, in the form of the present description, the

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The first communication apparatus can be other infrastructures or user equipment that have a corresponding base station function, and the second communication apparatus can be a small base station or other infrastructures that have the corresponding user equipment function. An objective of the present disclosure is to determine a channel condition between the communication apparatuses and consequently to perform processing such as appropriate pre-coding, resource scheduling and so on, to achieve efficient data communication between the communication apparatuses.

[0073] Two exemplary ways for acquiring the first channel information are respectively described hereinafter by the channel information acquisition unit 102.

[00741] In an exemplary manner, in a Double Frequency Division (FDD) system, the channel information acquisition unit 102 can be configured to acquire feedback information from a second reference signal from the second communication apparatus such as the first information of the. channel.

[0075] Specifically, for example, the first communication apparatus (eg, a base station) may send a second reference signal (eg, a Channel Status Indicator Reference Signal (CSI-RS), a Signal Cell Specific Reference (CRS) or the like) to the second communication device (eg user equipment), and consequently the user equipment can measure the second reference signal according to the corresponding measurement configuration information (which may include a measurement indication of the second reference signal) and feed back a measurement result to the base station using for example a channel quality indication (CQIi, a precoding matrix indication (PMI), a range indication (RI) or the like, when the first channel information reflects a channel condition. An example in this case is described below with reference to a schematic diagram of an interaction flow shown in Figure 8.

[00'7 6] As an example, the second reference signal may be a reference signal (for example CSI-RS, CRS or the like) in a height direction (for example, a vertical direction), which is adapted to a case where the number of user groupings in an angular direction (for example, a horizontal direction) is small, increasing the reception power that the user reference signal in the angular direction increases; furthermore, in this case, first acquired channel information is the channel information in a vertical direction for example. However, it should be understood that according to the present distribution of the antenna system and communication apparatus and the present performance requirement, the second reference signal may also be a reference signal in the angular direction (for example, a horizontal direction), which is adapted to a case where the number of user groupings in the height direction is small, thus increasing the reception power of the user's reference signal in the height direction, which also applies to the technology described in the present description.

[0077] Preferably, considering the correlation between the positions of antenna elements, the second reference signal can be transmitted only in a part of antennas (for example, a certain group of antennas) in an antenna system of the first communication apparatus ( for example, a base station), instead of being transmitted on all antenna elements, since in a case where a small space between the antenna elements, Strong correlation between the canar vectors corresponding to the different groups in the antenna system, effective information can be obtained to precode estimating a channel coefficient corresponding to only one group of antennas. For example, the base station can obtain, by sending the CSI-RS using an antenna column in the vertical direction, an estimation result of channel status in the vertical direction of the user equipment. In this way, the resource requirement of the reference serial can be reduced.

[0078] As another example.

the second reference signal may not be limited to a reference signal in a certain, fixed direction. In this case, preferably, the second reference signal may be bundled. Hence, in the example, device 100 may) further include a beamforming unit configured to perform static / semi-static beamforming on the second reference signal, which is different from the presetting process. coding based on a codebook. The channel information acquisition unit 102 may further be configured to acquire feedback information from the second beam-shaped reference signal of the second communication apparatus (eg, user equipment) as the first channel information. It should be understood that, in this case, the first acquired channel information may be the preliminary estimate information on the channel, eg emp1 an unequal channel address is obtained from the user equipment. It should be understood that, in the case of beamforming of the second reference signal, beamforming can be performed within a relatively wide range (ie, covering more user equipment) to obtain preliminary information on the channel.

[0079] As another example, the second reference signal can cover a downlink bandwidth and has a relatively long transmission cycle. Specifically, the second reference signal may be uniformly or approximately uniformly distributed over the entire bandwidth and cover the entire bandwidth. Accordingly, the user equipment feeds back the long-term / broadband channel status information of the second reference signal as the first channel-to-signal information link second channel information acquisition system 102 may further be configured preliminary , in order for the station to process the reference prime, covering a bandwidth of 15 narrowband downstream, thus acquiring the

one. Π 12 O ΓΪΪ18. C .1 or Π Ο Θ C ¿1 Π 8 ± ΓΠ or S θ X ¿i CL 8, [0080] as another exemplary way, in a

Tiemoo Division Double (TDD). the unit for performing the channel estimation according to a third reference signal from the second communication apparatus, to acquire the first channel information. Preferably, as an example, the third reference signal may be a

Uplink Sound Reference Signal (SRS).

[0081] Specifically, for example, the second apparatus

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The communication signal (eg, user equipment) can send the third reference signal (eg, an uplink SRS) to the third communication apparatus (eg, a base station), and therefore the base station can perform the channel estimation according to the third reference signal to obtain the first channel information in the channel. A specific channel estimation method is the same as that of the method in conventional technology, which is not described in detail here. An example in this case is described in detail below with reference to a schematic diagram of an interaction flow shown in Figure 9.

[0082] In summary, in an example in which the first communication apparatus is a base station and the second communication apparatus is user equipment, the base station may send a downlink reference signal that is not pre- encoded, and then acquire a channel status information report obtained by measuring the user equipment link reference signal, to determine downlink through the preliminary downlink channel status information. Alternatively, based on the reciprocity between the uplink / downlink channels, the base station estimates the preliminary downlink channel status information by receiving the link reference signal

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User Equipment Upstream [0083] Pre-encoding unit 104 may be configured to pre-encode the first reference signal into the first channel information. For example, precoding is performed such that the first reference signal is transmitted in a certain direction or in a certain beam. Preferably, the pre-encoding method may not be pre-encoded on the basis of a codebook, eg, ZF pre-encoding, and MMSE pre-encoding, to improve a reception level of the first reference signal from the user. Alternatively, the pre-encoding method can also be pre-encoded based on a codebook.

[0084] In a case where the first channel information is the channel information in a height direction (for example a vertical direction), the first reference signal may be a reference signal (for example a

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vertical, with the purpose of improving a reception level of the reference signal in the horizontal direction of the user equipment at different altitudes. Compared to the second reference signal, the first reference signal can be transmitted on all antenna elements.

[0085] It should be noted that the first reference signal and the second reference signal are not limited to the reference signals in the angular direction and the height direction, and may be reference signals in either direction based on the present cases. In this case, the pre-coding processing can be adapted to improve a reception level of the user equipment by a corresponding reference signal.

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<td>narrow bands</td><td>(by</td><td>example, sub-bands)</td><td>and it has a</td><td>cycle</td><td>of</td>

relatively short transmission. Specifically, the first reference signal can be spread over one or more narrow bands (eg, sub-bands) and does not cover the entire bandwidth. Accordingly, the user team performs short-term / narrowband (subband) feedback of the first reference signal to acquire more iri fo rmao ió η θ n e1 or π ai.

[0087] Preferably, the precoding unit 104 can be further configured to pre-code the first reference signal based on the channel information related to another communication apparatus. Specifically, in addition to the first channel information related to the user equipment present, the pre-coding unit 104 may pre-code a first reference signal of the user equipment present further based on the channel information related to another apparatus communication (for example, channel feedback information related to other user equipment obtained in the two exemplary ways described above). By considering the channel information fed back by the multiple user equipment in combination, it is possible to more effectively increase the reception level of the first reference signal from the user equipment, improve feedback accuracy, and simplify the complexity of the operation of pre-encoding at the end of the base station.

[0088] The measurement configuration information generating unit 106 can be configured to generate measurement configuration information from the second communication apparatus, where the measurement configuration information may include a measurement indication of the first pre-reference signal. encoded.

[0089] It should be understood that, in the previous examples, when the base station sends the second signal of

<td>reference to</td><td>uí team</td><td>suario, the station</td><td>base too</td>

<td>need send</td><td>r an indication</td><td>Measurement on the</td><td>second signal</td>

<td>reference</td><td>to u team</td><td>suario. I mean, the</td><td>Base station</td>

<td>can indicate</td><td>to the team of</td><td>user through</td><td>signage</td>

<img file="MX369904B_D0005.tif" />

for example, downlink control information (DCI) or the like, and consequently the user equipment can measure a corresponding reference signal · and perform the corresponding measurement feedback in response to the indication. Furthermore, the base station may use, for example, RRC signaling to carry the measurement configuration information, for example, report the antenna hole numbers to send the respective reference signals to the user equipment.

[0090j The control unit 108 can be configured to control the transmission of the data signal based on the second channel information, which is fed back to the first reference signal pre-encoded by the second communication apparatus according to the information of 15 measurement settings.

[0091] Specifically, for example, in response to the measurement configuration information, the second communication apparatus (eg, user equipment) can perform the corresponding measurement and feed back a measurement result to the first communication apparatus ( for example, a base station) through PMI, CQI and RI and so on, like the second channel information, and therefore the base station can perform operations related to data signal transmission, for example, channel retrieval, programming, modulation coding scheme adjustment, and so on, according to the second received channel information.

[0092] As a preferred example, the control unit 108 may be further configured to control the transmission of the data signal based further on the channel information related to another communication apparatus. Specifically, control unit 108 can control operations related to data signal transmission, 0 for example, selection of user pairs, allocation of resources, and so on, in multiple input-multiple output processing of multiple users (MU-MIMO), furthermore based on the measurement result of the first signal, pre-coded reference fed back from another communication device (for example other user equipment), i.e. the second channel information fed back by other user equipment, to the base station for example.

[0093] preferably, corresponding to the first channel information, the second channel information may be the channel information in an angular direction (eg, a horizontal direction) or additional information in the channel (ie, more accurate information ). For example, For example, in a case where the second channel information is the channel information in the horizontal direction, in the subsequent 25 operations, the control unit 108 may be precoded in the horizontal direction based on the second information of the Chanel. Precoding in the horizontal direction can be done by adopting a precoding method that is not based on a codebook (for

<td> 5</td><td>example,</td><td>pre-encoding ZF, p</td><td>re-coding</td><td>MMSE</td><td>or</td>

<td></td><td>Similar)</td><td>, to further increase</td><td>effectively a</td><td>level</td><td>of</td>

<td></td><td>reception</td><td>of the first sign of</td><td>e reference</td><td>; Qu 1. p O</td><td>of</td>

<td></td><td>user,</td><td>improve accuracy</td><td>feedback</td><td>Ic? Íón</td><td>and</td>

simplify the complexity of a pre10 encoding operation at the end of the base station.

Alternatively, a precoding method based on a codebook may also be adopted, and the codebook may be a codebook in the existing Long Term Advanced Evolution (LTE-A) system.

[0094] As you can see from the description

<td>previous of</td><td>according to the</td><td>modality of</td><td>the present</td>

<td>description,</td><td>doing the pre</td><td>-coding in</td><td>the direction</td>

<td>vertical is</td><td>possible to use</td><td>enough</td><td>a degree of</td>

freedom in the vertical direction, thus effectively increasing the level of reception of the reference signal in the horizontal direction of the user equipment and reducing the

<td></td><td>complexity</td><td>of operation. Furthermore, by</td><td>I made</td><td>czar an estimate</td>

<td></td><td>channel and</td><td>feedback from two</td><td>IS S Θ S</td><td>(i.e. first</td>

<td></td><td>getting</td><td>preliminary information</td><td>r in</td><td>the channel and then</td>

<td> 25</td><td>getting</td><td>additional information in</td><td>e 1 c</td><td>anal), information</td>

Relatively accurate in-channel can be obtained, thus optimizing system performance.

[0095] Preferably, the pre-coding unit may be selected to consider the channel information fed back by some rather than all user equipment at different radio resources, to perform the pre-coding operation. That is, if the channel information fed back by some of the user equipment in the same radio resource need not be considered, it is unnecessary to send the first pre-coded reference signal to these user equipment. Subsequently, an example in this case is described with reference to Figure 2. Figure 2 shows a block diagram of another example of functional configuration, of a device in a wireless communication system according to an embodiment of the present description.

[0096] As shown in Figure 2, a device 200 according to the example may include a channel information acquisition unit 202, a determination unit 204, a pre-coding unit 206, a unit for generating 208 measurement setup information and a 2'10 control unit. The examples of functional configurations of the channel information acquisition unit z02, the pre-coding unit 206, the measurement unit 208 generating the control unit 210 are substantially the same as the examples with functional configurations of the corresponding units described above with reference to Figure 1,

From here only an example of functional configuration of the unit is described in detail. 204 of determination.

[0097] In the example, preferably, the channel information acquisition unit 202 can be configured to acquire the first channel information from multiple second communication devices respectively.

[0098] Determination unit 204 can be configured to determine, based on the first channel information of the multiple second communication devices, whether a first communication device is sent to the first pre-coded reference signal to a corresponding second communication apparatus. In this way, based on a determination result from the determination unit 204, a base station can selectively send the first pre-coded reference signal to the user equipment. That is, according to the feedback channel information 1, the base station can select the user equipment to which the first pre-coded reference signal will be sent. In this way, the resource overhead for transmitting the reference signal can be reduced to some degree. Furthermore, as a preferred example, the determining unit 204 can further determine, according to a specific optimization objective, to which of the multiple second communication devices, the first communication device will send the first pre-coded reference signal.

[0099] Preferably, the pre-coding unit 206 may further be configured to pre-code, based on the determination result of the determining unit 204, the first reference signal of the first channel information of one or more of the multiple second communication devices.

[01001 For example, if the channel quality between any user equipment and the base station is determined to be poor according to the channel information fed back by the user equipment, the determining unit 204 determines that no processing is performed. MU-MIMO on these user computers subsequently and that no further channel information is required, and accordingly the pre-coding unit 206 can perform the pre-coding operation without considering these user e-types.

[0101] Specifically, as an example, the pre-encoding unit 206 can calculate the precoding matrices of the respective second communication apparatus of the first channel information of one or more of the multiple second communication apparatus, and precode the First reference signal that uses the superposition of the pre-coding matrices. In the example, a total pre-coding matrix is ​​generated using the superposition of pre-coding matrices of the selected second communication apparatuses, and weighting processing of a first reference signal which is βΠ VI3 ΘΪ1 13S respective antennas using the.

mat. Full pre-encoding r .iz, to fully multiplex the same physical transmission resources, thereby achieving directional transmission in multiple directions.

[01021 Alternatively, as another example, the pre-encoding unit 206 can compute the precoding matrices of the respective second communication apparatus for the first channel information of one or more of the multiple second communication apparatus, and precode the first reference signal using the pre-coding matrices respectively. Preferably, device 200 may assign different codewords, time or frequency resources to the first reference signal for one or more of the multiple second communication devices to perform multiplexing. In the example, the device 200 sends the first reference signal to the second selected communication devices as a code division,

1i emp fre θι device 20u can select different reference signal sequences, for example, orthogonal for the selected second communication devices to reduce interference.

or [0103] Subsequently, another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description is described referring to Figure 3. The Figure shows a block diagram of another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description.

[0104] As shown in Figure 3, a device 300 according to the embodiment may include a channel information acquisition unit 302, a determination unit 304, a radio resource allocation unit 306, a 308 pre-encoding, a configuration information generating unit 310 of

<td></td><td>measurement and a</td><td>unit 312 of</td><td>control.</td><td>The examples</td><td>όθ</td>

<td> 20</td><td>settings f</td><td>unional of the i</td><td>iniqaoo 0 2</td><td>acquisition</td><td></td>

<td></td><td colspan="2">channel information unit</td><td>304 of</td><td>determination,</td><td>the</td>

<td></td><td>308 unit of</td><td>pre-coding,</td><td>unit</td><td>310 of generae:</td><td>L o ri</td>

<td></td><td>information</td><td>settings</td><td>measurement</td><td>and unit 312</td><td>of</td>

<td></td><td>substantial control</td><td>ia 1me nte son igu</td><td>cl i Θ SQ ü. Θ</td><td>the examples</td><td>of</td>

functional configurations of the corresponding units

<img file="MX369904B_D0006.tif" />

<td>described</td><td>S</td><td>normally r&gt;</td><td>asserting s</td><td>1 a</td><td>Figure 2, and no</td><td>I know</td>

<td>repeat</td><td>here</td><td>. From</td><td>I only know here</td><td>give yourself</td><td>ribe in detail</td><td>a</td>

<td>example</td><td>of</td><td>setting</td><td>functional</td><td>of</td><td>unit 306</td><td>of</td>

allocation of radio resources.

[0105] The radio resource allocation unit 306 can be configured to allocate radio resources for transmission of a first pre-coded reference signal and / or a data signal based on the first channel information.

[0106] Specifically, as a preferred example, according to a determination result of the determination unit 304, if the determination unit 304 determines that it is not necessary to send the first precoded reference signal to some user equipment, ie , no additional exact channel information is needed for this user equipment, radio resource allocation unit 306 may allocate resources for data communication to this user equipment based on the first channel information present.

[010 /] In the modality of the present description, instead of allocating radio resources based on the channel information finally fed back into conventional technology, radio resources are assigned to the user equipment based on the information on the channel in a certain dimensional direction or preliminary information in the channel, thus improving the efficiency of resource utilization.

[0108] As an example, the devices 100 to 300 according to the previous modalities can be located at the end of the base station, and in this case, the device can also include a transmission-reception unit configured to perform communication with the user equipment. Subsequently, an example of functional configuration of the device in this case is described with reference to Figure 4. Figure 4 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to an embodiment of the present description.

[0109] As shown in Figure 4, a device 400 according to the example may include a transmit-receive unit 402, a channel information acquisition unit 404, a pre-coding unit 406, a unit 408 of generation of measurement configuration information and a control unit 410. The examples of functional configurations of the channel information acquisition unit 404, the pre-coding unit 406, the measurement configuration information generating unit 408 and the control unit 410 are substantially the same as the examples of functional configurations of the corresponding units described above referring to Figure 1, and are not repeated here. Hereinafter only one functional configuration example of the transmit-receive unit 402 is described in detail.

[0110] The transmit-receive unit 402 can be configured to perform signal transmit-receive 5 at t. re a base station and 1 equi ρ odeusuari o.

Specifically, for example, the receive-transmit unit 402 may be configured to send a second reference signal to the user equipment, receive the first channel information fed back by the user equipment, send a first pre-encoded reference signal, and the corresponding measurement configuration information to the user equipment, and receiving the second channel information fed back by the user equipment. Furthermore, the transmit-receive unit 402 can also be configured to receive a third reference signal from the user equipment for channel estimation. In addition, the transmit-receive unit 402 may further be configured to receive channel feedback information from other user equipment.

[0111 i Lía Figure 5 shows a block diagram of an example with the optional configuration of a device in a wireless communication system according to another embodiment of the present description. The device can be located at the end of the user equipment, although the present description is not limited to this. The device can also be located in a small base station or other infrastructure that has the anointing of the user equipment.

[0112

As shown in Fineness 5 a device according to the mode 0 0 0 may include a measurement unit 502 and a feedback information generation unit 504. Subsequently, functional configuration examples of the respective units are described in detail.

[0113] The measurement unit 502 can be configured to measure a first pre-coded reference signal from a first communication apparatus based on the measurement configuration information from a second communication apparatus from the first communication apparatus, where the information Measurement configuration may include a measurement indication of the first precoded reference signal. As an example, the first communication apparatus may be a base station, and the second communication apparatus may be user equipment.

[0114] The feedback information generating unit 504 can be configured to generate, based on the measurement of the first pre-coded reference signal, feedback information as the second channel information in a channel between the first communication apparatus and the second communication device, so that the. First communication device controls the transmission of data signal.

Specifically, after estimating the channel according to the first signal of the information generation reference, perform the codebook quantification to generate the channel. The second example information, additional channel information in the pre-encoded, the feedback unit 504 can according to a corresponding the second channel information can be, by in the angular direction or channel as described above. Specifically, as an example, corresponding to the description of the device at the end of the base station, the feedback information generating unit 504 can estimate a narrowband channel based on the first precoded reference signal and the channel information feedback narrowband 5 (eg, a subband).

[0115] Corresponding to the case where the FDD system described above, preferably, the measurement unit 502 can further be configured to measure a second reference signal from the first communication apparatus. The 0 second reference signal may be a reference signal in an angular direction for example, such that the base station obtains the status information of the downlink channel in the height direction, thus pre-encoding a horizontal reference signal to increase a reception level of the second communication apparatus horizontal reference signal and to preferentially eliminate interference in the height direction when the first communication apparatus performs precoding. It should be understood that, in this case, the unit

502 The measurement signal also needs to measure the second reference signal according to the corresponding measurement configuration information of the first communication apparatus, which includes the measurement indication of the second reference signal.

[01161 The feedback information generating unit 504 may further be configured to generate feedback information as the first channel information.,. in Canai in Octse to the measurement of the second reference signal, to be used by the first communication device. Specifically, after estimating the channel based on the second reference signal, the feedback information generation unit 504 can perform quantization according to a corresponding codebook to generate the first information from the.

channel, for the base station for example, to carry out pre-coding in the height direction, assign radio resources to the user equipment and so on, so that the reception level of the horizontal reference signal of the user can be increased. second communication apparatus, and the interference in the height direction can be preferentially eliminated when the first communication apparatus pre-encodes, thus improving the efficiency of resource utilization.

As an example, corresponding to the description of the device at the end of the base station, the feedback information generation unit 504 can estimate the broadband channel based on the second reference signal and feed back broadband channel information .

[0117] Preferably, a cycle in which the feedback information generation unit 504 performs the channel estimation based on the first pre-coded reference signal and feeds back the channel information that is shorter than one cycle in the which the feedback information generating unit 504 performs the channel estimation based on a second reference signal and feeds back the channel information.

[0118] It should be noted that the feedback information generating unit 504 may adopt different feedback codebooks for the quantization for the first precoded reference signal and the second reference signal. For example, the user equipment measures the second reference signal which is not pre-coded to obtain preliminary channel status estimate, and can determine a first matrix of the 2-bit PMI1 to the base station. The user equipment measures the first pre-coded reference signal to obtain further estimation of the channel status, and can determine a second pre-coded matrix from a second codebook and feed the 2-bit PM12 back to the base station. The base station can determine an exact channel status by considering PMI1, PMI2 (equivalent to a 4-bit indication) and the corresponding code books in combination.

[0119] Subsequently, an example of functional configuration of a device at the end of the equipment

<td>user corr</td><td>spond</td><td>tooth</td><td>to the previous case er</td><td>i the TDD system</td><td>I know</td>

<td>describes ha-</td><td>cendo</td><td>I laughed:</td><td>Reference to Figur.</td><td>a 6. Figure</td><td> 6</td>

<td>show a</td><td colspan="2">d 13 Q l ·. 3IT] 3</td><td>block of</td><td>another example</td><td>of</td>

<td>configuraoi ó</td><td colspan="2">n works]</td><td>l of a device</td><td>in a system</td><td>of</td>

<td>communication</td><td colspan="2">wireless</td><td>: a according to oti</td><td>? amoda 1 i dad de</td><td></td>

present description.

[0120] As shown in Figure 6, a device 600 according to the example may include a reference signal sending unit 602, a measuring unit 604 and a feedback intormation generating unit 606. The functional configuration examples of the measurement unit 604 and the feedback information generation unit 606 are substantially the same as the functional configuration examples of the corresponding units described above with reference to the

Figure 5, and are not repeated here. Hereinafter only an example of functional configuration of the reference signal sending unit 602 is described in detail.

[0121] Reference signal sending unit 602 can be configured to send a third reference signal to a first communication apparatus, for the first communication apparatus to perform channel estimation to obtain the first channel information on a channel .

[0122] Specifically, as described above, the reference signal sending unit 602 may send, for example, an uplink SRS to the first communication apparatus (eg, a base station). The base station can perform the channel estimation according to the received uplink SRS to obtain the first channel information, and then the base station can use the first channel information for example, to pre-encode in one direction vertical, allocate radio resources, and so on.

[0123] As an example, devices 500 and 600 according to the previous modalities can be located at the end of the user equipment, and in this case, the device can also include a transmission-reception unit

<td>configured</td><td>for real i</td><td>czar communication</td><td>COTI _Ld 6StaCÍOn</td>

<td>base by</td><td>example.</td><td>Subsequent mind,</td><td>an example of</td>

Functional configuration of the device in this case is described referring to Figure 7. Figure 7 shows a block diagram of another example of functional configuration of a device in a wireless communication system according to another embodiment of the present description.

[0124] As shown in Figure a device 700 according to the example may include a transmit-receive unit 702, a measurement unit 704 and a feedback information generation unit 706. The examples of functional configurations of the measurement unit 704 and the unit / ad 7 06 for generating feedback information are ios the same as the examples of functional configurations of the corresponding units described above referring to Figure 5, and are not repeated. here. Hereinafter only one functional configuration example of the transmit-receive unit 702 is described in detail.

[0125] The transmit-receive unit 702 can be configured to perform signal transmit-receive between the user equipment and a base station. Specifically, for example, the receive-transmit unit 702 may be configured to receive a second reference signal and the corresponding measurement configuration information from the base station, send a measurement result of the second reference signal to the base station as the first channel information, receiving a first pre-coded reference signal and corresponding measurement configuration information from the base station, and sending a measurement result of the first pre-encoded reference signal to the base station as the second channel information. Furthermore, the receive-transmit unit 702 can further be configured to send a third reference signal to the base station, for the base station to perform the channel estimation. In this case, the reference signal sending unit 10 described referring to the

Figure 6 can be implemented by the transmission-reception unit 7 02. Furthermore, it should be understood that the transmit-receive unit 702 can also be configured to perform signal transmit-receive between the user equipment and other external apparatus.

[0126] Here, it should be noted that the device at the end of the user equipment described here corresponds to the device at the end of the base station described above, and hence the details not described in detail here may refer to the above description , and are not repeated here.

[0127] In order to facilitate the understanding of the above processes, from here on an interaction process regarding channel estimation and feedback between a first communication apparatus (for example, a base station) and a second communication apparatus Communication (eg, user equipment) is described by referring to the schematic flow diagrams shown in Figure 8 and Figure 9.

[0128] Figure 8 shows a schematic diagram of an example of an interaction flow in a wireless communication system according to an embodiment of the present description. The interaction flow corresponds to the case in the FDD system described above. The description was made here taking the interaction between the base station and the user equipment as an example, although it should be understood that the present description is not limited thereto.

[0129] As shown in Figure 8, in step S801, the base station sends a second reference signal (eg, a CSI-RS in a vertical direction) and corresponding measurement configuration information (which may include a measurement indication of the second reference signal) to the user equipment to estimate a physical channel in the vertical direction. In step S802, the user equipment performs the channel estimation based on the second reference signal, and in step S803, the user equipment performs the quantization according to a second

<td></td><td>book</td><td colspan="2">of codes. Subsequently,</td><td>at step S304,</td><td>the</td>

<td></td><td>equipment</td><td>of</td><td>user feedback the</td><td>first information</td><td>of</td>

<td></td><td>channel</td><td>get</td><td>going through quantification</td><td>ition to station ba</td><td>I know.</td>

<td></td><td>In the</td><td>stage</td><td>S8 05, ia es) .. base action pu</td><td>ede select the equ</td><td>ipo</td>

The user to which the first precoated reference signal will be sent according to the first channel information, that is, the selected user equipment which channel feedback information will be considered in a subsequent precoding operation. At the stage

<td>S806, the station</td><td>base pre-encodes, to</td><td>a way</td><td>for example</td><td>-O!</td>

<td>pre-coding</td><td>ZF, pre-coding</td><td>MMSE you</td><td>imilar,</td><td>the</td>

<td>first sign of</td><td>reference (by e</td><td>example CS</td><td>I.-RS in l</td><td>; na</td>

horizontal direction) according to a selection result and 10 in combination with the first channel information, to estimate an equivalent channel in a horizontal direction. Pre-coding in this case is pre-coding in a vertical direction, which can eliminate interference between different user equipment in the vertical direction, for example, and the equivalent channel in the horizontal direction is used to describe a equivalent channel in the horizontal direction relative to a user after precoding in the vertical direction. Subsequently, in step S807, the base station sends the first pre-coded reference signal and corresponding measurement configuration information (which may include a measurement indication of the first pre-coded reference signal) to the user equipment. Subsequently, in step S808, the user equipment can perform the channel estimation based on the first reference signal, and in step S809, the user equipment performs the quantization according to a codebook. It should be noted that the first codebook here is different from the second codebook described above. Subsequently, in step S810, the user equipment feeds back the second channel information obtained by quantization to the base station, for the base station to perform subsequent operations such as pre-coding, programming, modulation coding adjustment, and so on. successively.

[0130] It should be understood that the interaction process described with reference to Figure 8 is only an example, and those skilled in the art may make appropriate changes to the above interaction process according to the principles of the present disclosure. For example, in step S801, before sending the second reference signal to the. User equipment, the base station can perform static / semi-static beamforming on the second reference signal, so that the user equipment can feed back the preliminary information on the channel as the first information on the channel. In addition, for example, in addition to receiving the first channel information and the second channel information fed back by the user equipment present, the base station can also receive the first channel information and the second channel information fed back by the other user equipment. user to perform

<img file="MX369904B_D0007.tif" />

the corresponding operations, thus optimizing the performance of the · system.

[0131] Subsequently, another example of an interaction process according to an embodiment of the present description is described with reference to Figure 9. Figure 9 shows a schematic diagram of another example of an interaction flow in a communication system wireless according to an embodiment of the present description. The interaction process shown in Figure 9 corresponds to the case in the TDD system described above.

[0132] As you can see, the interaction process

<td>shown in</td><td>Figure 9 is substantially</td><td>same</td><td>to the</td><td>process</td>

<td>of interaction</td><td>.on shown in Figure 8, exce</td><td>pto by</td><td>the</td><td>keep</td>

<td>of acquisition</td><td>.on of the first information of the</td><td>channel,</td><td>CHALK</td><td>there what</td>

only the .acquisition of the first channel information in the interaction process is described in detail here.

[0133] As shown in Figure 9, in step S901, the user equipment sends a third reference signal, eg, an uplink SRS, to the base station.

Subsequently, in step S902, the base station performs the channel estimation according to the third received reference signal to obtain the first channel information in the channel, and determines in the subsequent step S903, whether it sends the first reference signal pre-coded to the user equipment according to the first information of the

5 channel. The processing in the subsequent stages is substantially the same as the processing in the corresponding stages described with reference to the

Figure 8, and nc is repeated here.

[0134] Subsequently, a two-phase precoding scheme for a data signal according to the technology is described in the present description with reference to Figure 10 to Figure 13.

[0135] Figure 10 shows a block diagram of an example of functional configuration of a device in a wireless communication system according to another embodiment of the present description.

[0136] As shown in Figure 10, a device 1000 according to the embodiment may include a first generation unit 1002, a second generation unit 1004 and a pre-coding unit 1006. Subsequently, examples of functional configurations of the respective units respectively are described in detail.

[0137] The first generation unit 1002 can be configured to generate a first encoding matrix according to the first channel information on a channel between a first communication apparatus and a second communication apparatus.

[0138] As an example, the first channel information is, t ical

<img file="MX369904B_D0008.tif" />

for example, channel information in a preliminary ormac direction on the channel, which can be obtained by the channel estimation and two-phase feedback scheme according to the embodiment of the present description described above or in other ways in conventional technology. In this case, the first generated pre-coding matrix can be a pre-coding matrix.

<td>coding</td><td>at the address</td><td>go rt i</td><td>lime.</td><td></td><td></td>

<td> [0139]</td><td>The second one</td><td>ii dad</td><td>1004 of</td><td>generation</td><td>can</td>

<td>set up</td><td>To generate</td><td>a</td><td>second</td><td>matrix of</td><td>pre-</td>

<td>coding</td><td>agree</td><td>to</td><td>first</td><td>matrix of</td><td>pre -</td>

encoding and the second channel information on the channel.

[0140] As an example, the second channel information can be for example channel information in a horizontal direction or additional information on the channel, which can be obtained by the channel estimation and two-phase feedback scheme according to the modality of the present description described above or in other ways in conventional technology. In this case, the second generated precoding matrix can be a precoding matrix in the horizontal direction. Subsequently, examples of specific functional configurations of the second generation unit 1004 are described in detail with reference to Figure 11, to describe the generation of the second pre-coding matrix. The Figure shows a block diagram of an example of functional configuration of the second generation unit in the device according to an embodiment of the present description.

[0141] As shown in Figure 11, generation may further include an equivalent second channel matrix generation module 1102 and a second pre-coding matrix generation module 1104.

[0142] The equivalent channel matrix generation module 1102 can be configured to generate an equivalent 10 channel matrix according to the first precoding matrix and the second channel information.

Specifically, the equivalent channel matrix generation module 1102 can generate the equivalent channel matrix according to an internal product of the first pre-encoding matrix and the second channel information, and the equivalent channel matrix is ​​used to describe a equivalent channel relative to a user after precoding in the vertical direction, for example.

[0143] The second pre-coding matrix generation module 1104 can be configured to generate a second pre-coding matrix according to the generated equivalent channel matrix. The second pre-coding matrix can be a pre-coding matrix in a horizontal direction, for example.

[0144] It should be understood that, for example, the first generated precoding matrix3 and the second precoding matrix can be used to respectively eliminate interference between different user equipment in the vertical direction and the horizontal direction, thereby which can be accomplished by pre-coding algorithms that are not Past Codebooks, for example, pre-coding

ZF, pre-encoding MMSE, and so on.

[0145j Subsequently, referring back to Figure 10, an example of functional configuration of the pre-coding unit 1006 is continuously described.

[0146] The pre-coding unit 1006 can be configured to pre-code a data signal according to the first pre-coding matrix and the second pre-coding matrix.

[0147] Specifically, an example specific functional configuration of the precoding unit 1006 is described with reference to Figure 12, to describe how to pre-code a data signal according to the first pre-coding matrix and the second matrix of pre-coding. Figure 12 shows a block diagram of an example of functional configuration of the precoding unit in the device according to an embodiment of the present description.

[0148] As shown in Figure 12, the precoding unit may further include a third precoding matrix generation module 1202 and a precoding execution module 1204.

[0149] The third pre-coding matrix generation module 1202 can be configured to generate a third pre-coding matrix according to the first pre-coding matrix and the second pre-coding matrix. Specifically, the third precoding matrix generation module 1202 can generate the third precoding matrix according to a Kronecker product of the first precoding matrix and the second precoding matrix.

[0150] The pre-encoding execution module 1204 can be configured to pre-encode a data signal using the third pre-encoding matrix. Accordingly, by pre-encoding the data signal using the third pre-encoding matrix generated in the manner cited above, it is possible to eliminate interference between user equipment in the north-horizontal direction and the vertical direction, for example, by simplifying thus the design 20 of the detection, of the signal at the receiving end (for example, the user equipment) and optimizing the performance of the system.

[0151] It should be understood that, although the description has been made assuming that the first channel information and the second channel information are channel information in the vertical direction and the horizontal direction respectively, this description is not limited thereto.

Alternatively, the first channel information may be preliminary information on the channel, the second channel information may be additional information on the channel, without being limited to the information in technology herein.

[01521 Hereafter coding according to a description taking a multi-user cell environment scheme [0153] It is assumed that the station is a certain direction, and the zion also applies to this describes a premodality scheme of the present pre-encoding in a single as an example.

Base Ion adopts a flat antenna system with uniform D spacing, and is considered a narrowband multi-path model in the following:

/> - -i go [0154 1 Where K indicates the number of users, indicates a channel matrix from a base station to the k-th user, M_z and M_and indicate the numbers of antennas in an antenna system in a horizontal direction and a vertical direction respectively, and P indicates the number of multiple

IF routes. * indicates a channel matrix corresponding to a pth sub-path, and an element in row rn and column n of the channel matrix is ​​expressed as:

/ 7 ^ exp {- /2.ΤΓ - ((m 1) eos eos β £ + (r? - 1) sin / ¾⁰)} [0'155] Where * indicates a legacy angle in a β?

horizontal direction, * indicates an angle of arrival in a vertical direction, and λ indicates a signal wavelength.

The channel matrix corresponding to the subway can be expressed as a form of a Kroneoker product in the following:

H '= A'I «f._TO. ® (ht.) '[0156] Where a channel vector in a horizontal direction and a channel vector in a vertical direction are respectively expressed as:

v? /. ' ,

Py X py ™ / _¿_ZT —ÍA LUS / i (4 - /, - 1) /) •, cxp-¡- / 2m ----'---—— • c-vsOj eosβ *) _}!¡) . (4-/,.-1)/.) .

hf. - [I, · · ·. exp [- / 2zf - sin Ik!, ···. exp {- -------------—......- without ///} jzz [0157] Therefore, the H-channel matrix_k it is expressed as:

ii_k - V iif p · i

Pk /> · '[0158] In order to use an extra degree of freedom introduced in the vertical direction in the 3D-MIM0 system, the matrix. del cañar is approached as:

pp

<img file="MX369904B_D0009.tif" />

¿'-1 !> '

<img file="MX369904B_D0010.tif" />

[0159] indicates a vector of the approximate channel in the vertical direction. A pre-coding operation 5 can be performed in the vertical direction and the horizontal direction respectively using the approximate expression above.

[0160] In one example, the base station can measure an SRS signal sent by it. user equipment and obtain the channel matrix 10 based on the reciprocity between the uplink / downlink channels. Furthermore, the base station can receive the SRS signal using only the antenna in the vertical direction to obtain the channel vector in the vertical direction. Alternatively, as in modalities 15 above, the base station may obtain a channel matrix that has been reacquainted. or a C SI report, which is fed back by the user equipment measuring a downlink reference signal.

[0161] The two stage pre-coding scheme 20 proposed by the present disclosure is briefly described as follows.

[0162] First, pre-encoding is performed in a vertical direction. In a multi-user environment, a channel matrix in a vertical direction is represented as:

H, - [hi,_F, ·· Χγ e €^m^^k [0163] For the channel matrix, different pre-coding methods can be adopted to eliminate interference between users in the vertical direction. For example, if a zero-force pre-coding algorithm is adopted, a pre-coding matrix ie the first pre-coding matrix} is calculated as

W. HÍ '(HJ1.) Ί, where it indicates a diagonal matrix, to ensure ur power limitation of a sending vector.

The pre-coding matrix is ​​written as

W_v í w, l vl ^WvWhere indicates a pre-encoding vector in a vertical direction corresponding to a k-th user.

[0164] Next, an equivalent channel vector is calculated in a horizontal direction. According to the H channel matrix_k and the precoding vector W_Saw in the vertical direction, an equivalent channel in a horizontal direction of the k-th user is calculated as:

[0165] Finally, a precoding matrix in a horizontal direction (ie, the second precoding matrix described above) is calculated according to the equivalent channel in the horizontal direction. An equivalent channel matrix in a horizontal direction (i.e. the equivalent channel matrix described above) is represented as:

[0166] A pre-coding operation is performed according to the matrix. For example, in case of adopting the precoding zero force, the precoding matrix in the horizontal direction (that is, the second precoding matrix._and, ^W> <Η;) (ΐρ (ΙΐρΓ 'I,. _{don <je la} r

Diagonal “is used to ensure that the shipping vector replaces a power limiting condition. The precoding matrix in the horizontal direction is expressed as^W/_F.AI where

<img file="MX369904B_D0011.tif" />

indicates a pre-encoding vector in a horizontal direction of the k-th user, then a pre-encoding matrix of the k-th user (i.e. the third pre-encoding matrix described above) is represented as:

0167] As you can see, with the scheme of

<img file="MX369904B_D0012.tif" />

In coding the present disclosure, the extra degree of freedom in the vertical direction can be used adequately. By compared to existing scheme, interference between users can be effectively reduced; and compared to the full-space precoding scheme, the complexity of the precoding operation can be significantly reduced. Furthermore, in combination with the two-phase feedback and channel estimation scheme described above, the pre-coding scheme described above can be applied to environments, for example,

FDD and so on, and also adapts to a multi-cell environment.

A simulation result for the multi-cell environment is described below doing up to Figure 21.

[0168] It should be noted that although the precoding scheme of the present description is described by pre-coding in the vertical direction and the horizontal direction respectively, the present description is not

0 Limited thereto, the two-stage pre-coding scheme can be applied to other cases according to the principle of the present description, for example, the two or more stage pre-coding operation in directions in addition to the vertical direction and the horizontal direction, or performing the pre-coding operation creating the corresponding

6 sstóüs' matrix of pre-coding according to the channel feedback information twice (for example, preliminary channel information and additional channel information), without considering specific addresses.

[0169] Subsequently, in order to facilitate the understanding of the above process, an example of an interaction process regarding channel estimation and feedback and subsequent pre-coding of the data signal between a first communication apparatus and a second apparatus Communication is described by referring to a flowchart shown in Figure 13. Figure 13 shows a schematic diagram of an example of an interaction process in a wireless communication system according to an embodiment of the present description. Here, the description is made by taking ur interaction between a base station and a user equipment as an example, although the present description is not limited thereto.

[0170] As shown in Figure 13, first, in step S1301, the base station can obtain the first channel information in any exemplary manner described with reference to Figure 8 or Figure 9. Subsequently, in step S1302, the base station can select the user equipment to which a first pre-coded reference signal is sent according to the first channel information, compute a single orecoding matrix based on the selection result in one stage

S1303, and pre-encoding the first reference signal using the first pre-encoding matrix in step

S1304. Subsequently, in step S1305, the base station sends the first pre-coded reference signal and the corresponding measurement configuration information to the user equipment. In step S1306, the user equipment performs, in response to the measurement configuration information, the channel estimate according to the first pre-coded reference signal, and in step S1307, the user equipment feeds back the second channel information obtained by estimating to the base station.

Subsequently, in step S1308, the base station can calculate, using the above methods, a second pre-coding matrix according to the second channel information and the first pre-coding matrix. In step S1309, the base station calculates a third precoding matrix according to a Kronecker product of the first precoding matrix and the second precoding matrix, and precodes a data signal using the third precoding matrix. -coding in step S1310.

[0171] It should be understood that, the interaction process is only exemplary, and those skilled in the art can modify the above interaction process according to the beginning of the present description. For example, the select operation in step S1302 can be skipped, and the first pre-coded reference signal can be sent directly to all user equipment, although this could result in a loss of resources.

[0172] Subsequently, an example of a structure of a wireless communication system according to an embodiment of the present description is described with reference to Figure 14. Figure 14 shows a block diagram of an example of a structure of a wireless communication system according to an embodiment of the present description.

[0173] As shown in Figure 14, a wireless communication system 1400 according to the embodiment may include a first communication device 1402 and a second communication device 1404.

[0174] Ξ1 first communication apparatus 1402 can be configured to: acquire the first channel information on a channel between the first communication apparatus and the second communication apparatus; pre-encode a first reference signal based on the first channel information; generating measurement configuration information for the second communication apparatus, where the measurement configuration information includes a measurement indication of the first pre-coded reference signal; and controlling the data signal transmission based on the second channel information, which is fed back to the first pre-coded reference signal by the second communication apparatus according to the measurement configuration information. The first communication apparatus 1402 may be a base station, for example, which may include the device described with reference to Figure 1 through Figure 4.

[0175] The second communication apparatus 1404 can be configured to: measure the first precoded reference signal in the measurement configuration information; and generating feedback information as the second measurement based channel information for the first pre-coded reference signal. The second communication apparatus 1404 may be user equipment, for example, which may include the device described with reference to Figure 5 through Figure 7, for example.

[0176] It should be understood that, although examples of functional configurations of the devices in a wireless communication system and the wireless communication system and the examples of the interaction process between the corresponding communication apparatus according to the mc 'are described above. For the purposes of the present description, they are only exemplifying and are not intended to be limitations. Those skilled in the art can modify the above modalities according

to.

for example adding, removing and / or combining functional modules in various modalities, and all such modifications fall within the scope of the present description.

[0177] Corresponding to the modalities of the above device, methods are further provided in a wireless communication system according to an embodiment of the present description. Hereinafter, examples of method processes in a wireless communication system according to an embodiment of the present description are described in detail with reference to Figure 15 to Figure 17 respectively.

[0178] Figure 15 shows a flow diagram of a process example of a method in a wireless communication system according to an embodiment of the present description. The method according to the modality corresponds to the device at the end of the base station described above.

[0179] As shown in Figure 15, the method according to the modality may include a step S1502 for acquiring channel information, a step S1504 for precoding, a step S1506 for generating measurement configuration information and a step S1508 control. Subsequently, the multi-stage processing is described respectively.

[0180] In step S1502 of acquiring channel information, the first channel information can be acquired on a channel between a first communication apparatus and a second communication apparatus. The first channel information may be acquired in any manner described with reference to Figure 8 or Figure 9, and the first channel information may be the information in a height or angular direction or preliminary information in the channel.

[0181] Subsequently, in the precoding step S1504, a first reference signal may be precoded based on the first channel information. Pre-coding processing can be performed using a pre-coding algorithm that is not based on a codebook, for example, a ZF pre-coding algorithm, an MMSE pre-coding algorithm, and the like, to eliminate interference between different user equipment, eg emplo.

[0182] Subsequently, in step S1506 of generating measurement configuration information, measurement configuration information can be generated for the second communication apparatus. The measurement configuration information may include a measurement indication of the first pre-coded reference signal, to indicate the second communication apparatus (eg, user equipment) that is to measure the reference signal.

Γ01831 Subsequently, in the control stage S1508, the data signal transmission can be controlled based on the second channel information, which is fed back to the first pre-coded reference signal by the second communication device according to the information measurement setup. For example, operations such as pre-encoding the data signal, scheduling, and so on, may be performed based on the second channel information.

[0184] Figure 16 shows a flowchart of a process example of a method in a wireless communication system according to another embodiment of the present description. The method according to the modality corresponds to the device at the end of the user equipment described above.

[0185] As shown in Figure 16, the method according to the modality may include a step S1602 for measurement and a step SI 604 for generating feedback information.

[0186] In the measurement step S1602, a first pre-coded reference signal of a first communication apparatus can be measured based on the measurement configuration information for the second communication apparatus of the first communication apparatus, where the information Configuration, measurement may include a measurement indication for the first pre-coded reference signal. As an example, the first reference signal can be a reference signal in an angular or altitude direction, or a reference signal in any direction.

[0187] Subsequently, in step Si 604 of generating feedback information, based on a measurement of the pre-coded reference signal, the feedback information may be generated as the second channel information in a channel between the first communication apparatus and the second communication apparatus, so that the first communication apparatus controls the transmission of the data signal. The second channel information may be channel information in an angular direction or a height direction direction, for example, or additional information in the channel.

[0188] Preferably, in the measurement step S1602, a second reference signal from the first communication apparatus (eg, a reference signal in the height or angular direction, or a reference signal in any direction) can be measured. ), and in step S1604 of generating feedback information, feedback information of the second reference signal is generated as the first channel information, for the first communication apparatus to pre-encode the first reference signal, allocating radio resources to [0189] Figure 17 shows a flow diagram of an example process of a method in a wireless communication system according to another modality of the present description. The method according to the modality corresponds to the device to pre-encode a data signal in the equipment and so on.

end of the base station described above.

[0190] As shown in Figure 17, the method according to the modality can include a first generation step S1702, a second generation step S1704 and a pre-coding step S1706.

[0191] In the first generation step S1702, a first pre-coding matrix can be generated according to the first channel information on a channel between a first communication apparatus and a second communication apparatus.

The first information

C 3 Π 3 _L may be the first channel information obtained by the above methods, or channel information obtained by other methods.

[0192] Subsequently, generation, encoding may be generated according to in the second step S17 04 of a second pre-matrix the first pre-coding matrix and the second channel information in the channel. The second channel information may be the second channel information obtained by the above methods, or channel information obtained by other methods.

[0193] Subsequently, in the precoding step S1706, a data signal may be pre-coded according to the first matrix pre-coded te. f ication and the second pre-coding matrix. Specifically, a third precoding matrix can be generated according to a Kronecker product of the first precoding matrix and the second precoding matrix, and the data signal is precoded using the third precoding matrix. coding.

[0194] It should be noted that, above, process examples of the methods in the wireless communication system according to the modalities of the present description are described, although these are only examples and are not intended to be limitations. Those skilled in the art may modify the above modalities according to the principles of the present description, for example, add, delete and / or combine steps in various modalities or the like, and all such modifications fall within the scope of the present description.

[0195] Furthermore, it should be noted that the method modalities here correspond to the device modalities described above, and hence the content of which is not described in detail in the method modalities may refer to the description in the corresponding positions of the modalities of the device, and are not repeated here.

[0196] Furthermore, an electronic apparatus according to an embodiment of the present disclosure is further provided. The electronic apparatus may include one or more processors configured to perform the methods in a wireless communication system according to the modalities of the present description.

[0197] It should be understood that the machine executable instructions on a storage medium and a program product according to the modalities of the present description can also be configured to execute the methods corresponding to the apparatus modalities described above, therefore the content of which, not described in detail, may refer to the description cited above in the corresponding 5 positions, which are no longer repeatedly described here.

[0198] Accordingly, a storage medium on which the product of the above program that stores machine executable instructions is kept is also included in the description. The storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a storage card, a memory stick, and the like.

[0199] In addition, it should be noted that the aforementioned series of processes and devices can also be incorporated into an unalterable computer program and / or software. In the case of being incorporated into a computer program and / or inalterable software, a program that constitutes the computer program is installed from a medium

<td colspan="3">storage or</td><td>a network</td><td>to a computer with</td><td>a</td>

<td> ¡7.</td><td>structure of na</td><td>rdwa re</td><td>dedicated,</td><td>for example for example</td><td>a</td>

<td></td><td>computer 18 0 (</td><td>j pers &lt;</td><td>u onal</td><td>So general, illustrated in</td><td>the</td>

<td></td><td>Figure 18, which</td><td>can</td><td>_r Ω a 1 ί -7 -a y- 1. i., Ci a. -i. ¿D L</td><td>various functions when</td><td>I know</td>

they install several programs in it.

[0200] In Figure 18, a Processing unit 1801

Central (CPU) performs various processes according to a program stored in a 1802 Read Only Memory (ROM) or loaded from a 1808 portion of storage in a Random Access Memory (RAM) 1803 in which the required data is also stored. when the CPU 1801 performs the various processes when necessary.

[0201] CPU 1801, ROM 1802, and RAM 1803 connect to each other through a bus 1804 to which an input / output interface 1805 is also connected.

[0202] The following components connect to the interface. 1805 input / output; an input portion 1806 that includes a keyboard, mouse, etc .; an output portion 180 that includes a display, for example, a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), etc., a speaker, etc .; a 1808 portion of storage that includes a hard drive, etc .; and a communication portion 1809 including a network connection card, for example, a LAN card, a moderator, etc. Communication portion 1809 performs a communication process on a network, for example, the Internet.

[02031 An 1810 disk drive also connects to the input / output 1805 interface when required. A removable medium 1811, for example, a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., can be installed in the disk drive 1810 when necessary so that the computer program taken from it can be installed in storage portion 1808 when needed.

[0204] In the event that the series of processes mentioned above are carried out in a computer program, 15 a program that constitutes the computer program is installed from a network, for example, the Internet, etc., or a storage medium, for example, removable 1811 media, etc.

[0205] Those skilled in the art will appreciate that such a storage medium will not be limited to the extra 1811 20 medium illustrated in Figure 18 in which the program is stored and which is distributed separately from the apparatus to provide the program to a user. Examples of the removable 1811 raedlo include a magnetic disk (including a Floppy Disk (a trademark)), an optical disk 25 (including a Compact Read-Only Disk (CD-ROM) and a

<td>Digital versatile disc</td><td>(DVD)), a d</td><td>isco magneto</td><td>&gt; -optic ico</td>

<td>(including a Mini-Disc</td><td>(MD) (a brand</td><td>registered))</td><td>and one</td>

<td>semiconductor memory.</td><td>Toggle ivamen</td><td>you the med</td><td>, io of</td>

<td>storage can be</td><td>ROM 1802, a</td><td>hard drive i</td><td>included</td>

<td>in portion 18 08 of &lt;</td><td>storage, e</td><td>te., in the &lt;</td><td>which one</td>

<td>stores the program and</td><td>which was dis</td><td>draw together</td><td>with the</td>

apparatus including the same for the user.

[0206] Subsequently, a simulation of system performance is applied in a case where the technology of the present description is described with reference to Figure 19 through Figure 21, to illustrate the improvement in system performance achieved by the technology of the present description compared to conventional technology.

[0207] It is considered a multi-user-multi-cell environment. L = 7 indicates the number of cells and K^:^ 8 indicates the number of users served at the same time resource. A base station is located in the center of each cell, and the user equipment is randomly distributed. The

Figure 19 shows a schematic diagram of an example of distribution of communication apparatus in a simulation.

For diffusion of an angle of arrival, it is assumed that the diffusion of an angle in a horizontal direction is 180 degrees, the diffusion of an angle in a vertical direction is only 5 degrees, and the angle of arrival follows a uniform distribution. form.

[0208] It is assumed that the base station information has acquired the channel status information using the channel estimation and two-phase feedback scheme according to the modality of the present description described above. It is assumed that it indicates a channel matrix from a base station in an s-th cell to the k ~ th user equipment in a 2-th cell. The following narrowband channel model is adopted in the simulation.

- H ',

P ³ [0209] Where P =] 0 indicates the number of multiple pathways.

A matrix indicates a channel matr of the ρ-th sub-pathway

H ^p

JL.JL and ¡

An element in the nth row and column n of the array is:

’ ^:= / C cxp 1- / 2 / 7-4 - ((^ - eos + (/? - l) sin / ¾)} a [0210] Where β^Ρ nt &lt;

indicate the angles of arrival in a tion respectively ¿i Cf Γ HΓ1 Θ SC αία and a fading coefficient is calculated from the following equation

0211 'Where d_kls indicates a distance from a base station in an s-tn cell to the k-th user equipment in a 1-th _ZP cell, a indicates a path loss coefficient, Afc indicates a shadow fading coefficient and follows an i

σ;

normal distribution to the algorithm with a vanity -. In the simulation, it is assumed that a = 3.5, [02121 an estimated channel base station of the 1-th cell

-^Η»⁺Σ^Η«.

[0213] The useful pre-encoding matrix base station above equation v uses the o_z-8 dB.

obtained at the end of the in the 1-th cell you get a hoisting the shaft.! estimated therein to transmit downlink data.

[0214] Simulations are carried out adopting the existing scheme and the two-phase pre-coding scheme according to the present description to carry out a pre-coding operation, and the differences between the performance of the system when adopting different precoding. The simulation results in the two exemplary cases are described below.

[0215] A first case: a radius of a cell is 200 m, and a height of a base station is 35 m. The heights of all user equipment are assumed to be 1.5m in the case. Figure 20 shows a simulation result in the

<img file="MX369904B_D0013.tif" />

First case, Figure 20 shows a schematic diagram of an example of comparison between spectrum efficiency in a wireless communication system to which conventional technology is applied and spectrum efficiency in a wireless communication system to which it is applied. the technology of the present description. In the F i. gure 20, e .1 number of antennas in a vertical direction is fixed as M_and= 8 and M_and= 128, and the number of antennas in a horizontal direction is variable. It can be seen from Figure 20 that, compared to the conventional scheme, better system performance is achieved according to the two-stage precoding scheme of the present disclosure. For example, in a case where M_and-8, spectrum efficiency can be reached at approximately 1.6 bps / Hz when using the two-stage pre-coding scheme, and spectrum efficiency can be reached only at approximately 0.6 bps / Hz when used. the. conventional scheme. In a case where M_and= 128, the increase obtained by the scheme according to the present description still exceeds 0.2 bps / Hz. Furthermore, it can be seen from Figure 20 that, when the M_v the greater (i.e. the number of antennas in the vertical direction), the greater the spectrum efficiency. For example, in a case where M_and is increased from 8 to 128, the spectrum efficiency achieved by the scheme of the present description is improved from a value less than 2 bps / Hz to approximately 2.3

<img file="MX369904B_D0014.tif" />

bps / Hz, since when M_and the higher, the more accurate the precoder is. in the vertical direction, thus improving overall performance.

[0216] In a second case, simulation parameters are selected with reference to 3GPP TR 36.873. In particular, the simulation environment is a large cell in a city with a high density of users. A cell radius is 250m, and the height of a base station is 25m. The height of the user equipment is generated from the following Θ CU 3CΙΟΩí = 3 (/ 7, .- 1) + 1.5

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within an interval of [4, 8].

[0218] Figure 21 shows a simulation result in the second case. Figure 21 shows a schematic diagram of a zero example of comparison between spectrum efficiency in a wireless communication system to which conventional technology is applied and spectrum efficiency in a wireless communication system to which the technology of the present description is applied. . Since a radius of a cell becomes large, more user equipment will suffer inter-cell interference, hence the average spectrum efficiency is reduced to a certain degree, However, compared to the conventional solution, it is even better achieved system performance with the scheme of the present description. Similarly, as described above, the system performance achieved by the scheme of the present description will be improved when more antennas are placed in a vertical direction.

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freedom introduced by antennas in the vertical direction can be better used by the pre-coding solution

<td>in the direc</td><td>tion</td><td>vertical</td><td colspan="2">What about there</td><td>I know</td><td>reduce</td>

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pilot, thus further improving system performance.

[0220] Furthermore, it should be noted that, depending on the simulation result, it might be inappropriate to select a discrete Fourier Transform (DFT) vector as a codebook in the vertical direction, and a codebook needs to be designed that is best suited to a 3D-MIMO system [0221] Subsequently, application examples according to the present description are described with reference to Figure 22 through Figure 24.

Application Example Regarding eNB (First Application Example) [0222] Figure 22 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology of the present description can be applied. An eNB 2200 includes one or more antennas 2210 and a base station apparatus 2223. Each 2210 antenna and apparatus

2220 Base station can be connected to each other via RF cable.

[0223 j Each of the antennas 2210 includes a single or multiple elements (such as multiple antenna elements included in a multiple-input-multiple-output (MIMO) antenna), and is used for base station apparatus 2220 to transmit and receive radio signals. The eNB 2200 can include multiple antennas 2210, as illustrated in Figure

22. For example, the multiple 2210 antennas may be compatible with multiple frequency bands used by the eNB 2200. Although Figure 22 illustrates the example in which the eNB 2200 includes the multiple 2210 antennas, the eNB 2200 may also include a single 2210 antenna. .

[02241 Base station apparatus 2220 includes a controller 2221, a memory 2222, a network interface 2223 and a radio communication interface 2225.

[0225] Controller 2221 may be, for example, a CPU or a DSP, and operates various functions of a higher layer of base station apparatus 2220. For example, controller 2221 generates a data packet of the data on the signals processed by radio communication interface 2225, and transfers the generated packet through network interface 2223. Controller 2221 can group data from multiple baseband processors to generate the grouped packets, and transfer the generated grouped packet. Controller 2221 may have logical functions to perform such control as radio resource control, radio carrier control, mobility management, admission control, and scheduling. Control can be performed in the company of an eNB or a central network node in the vicinity. Memory 2222 includes RAM and ROM, and stores a program that is executed by controller 2221, and various types of control data (such as a list of terminals, transmission power data, and programming data).

[0226] Network interface 2223 is a communication interface for connecting base station apparatus 2220 to a central network 2224. Controller 2221 can communicate with a core network node or other eNB through the interface

2223 network. In that case, the eNB 2200, v the core network node or the other eNB can connect to each other through a logical interface (such as an SI interface and an interface

X2). The network interface 2223 may also be a wired communication interface or a radio communication interface for the return radio network. If the network interface 2223 is a radio communication interface, the network interface 2223 may use a higher frequency rate for the communication ratio than a frequency band used by the radio communication interface 2225.

[02261 Radio communication interface 2225 supports any cellular communication scheme such as Long Term Evolution (LTE) and advanced LTE, and provides radio connection to a terminal positioned in an eNB 2220 cell via

<td>from i</td><td>The prev</td><td>ia 2210.</td><td>the interface</td><td>Radie 2225</td><td>&gt; -c omualeation</td>

<td>type</td><td>camente</td><td>also j</td><td>usually include</td><td>, for example,</td><td>a processor</td>

<td> 222 6</td><td>debase</td><td>base (</td><td>BB) yuncir</td><td>cuito RF 2227.</td><td>Processor</td>

<td> 222 6</td><td>can</td><td>perform,</td><td>for example</td><td>, encode / dec</td><td>build a</td>

<td>mod</td><td>lotion / d</td><td>emodulation</td><td>ón, and muí</td><td>idemu11 typed</td><td>-.iplexed, and</td>

performs various types of layered signal processing (such as

Ll, medium access control (MAC), radio link control (RLC), and a packet data convergence protocol (PDCP). The BB 2226 processor may have some or all of the logical functions described above instead of the 2221 controller. The BB 2226 processor may be a memory that stores a communication control program, or a

8 module that includes a processor and related circuit configured to run the program. Updating the program may allow the functions of the BB 2226 processor to be changed. The module may be a card or a blade that is inserted into a slot in the base station apparatus 2220. Alternatively, the module can also be a chip or microcircuit that mounts to the card or blade. Meanwhile, the RE 2227 circuit may include, for example, a mixer, a filter, and an amplifier, and transmits and receives radio signals through antenna 2210.

[0227] Radio communication interface 2225 may include multiple BB 2226 processors, as illustrated in Figure 22. For example, multiple BB 2226 processors may be compatible with multiple frequency bands by eNB 2200. Interface 2225 Radio communication may include the multiple 2227 RE circuits, as illustrated in Figure 22. For example, the multiple RE '2227 circuits may be compatible with the multiple antenna elements. Although Figure 22 illustrates the example in which the radio communication interface 2225 includes multiple BB 2226 processors or a single RF circuit 222 /.

(Second Application Example)

Figure 23 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology of the present description can be applied.

An eNB 2330 includes one or more 2340 antennas, a 2350 base station apparatus, and an 2360 RRH. Each 2340 antenna and the 2360 RRH can be connected to each other via a cable

RF. The base station apparatus 2350 and the RRH

2360 they can be connected to each other through a high-speed line such as a fiber optic cable.

[0229] The 2340 antennas each include a single element or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna), and is used for the 2360 RRH to transmit and receive radio signals. The eNB 2330 may include the multiple antennas 2340, as illustrated in Figure 23. For example, the multiple antennas 2340 may be compatible with multiple frequency bands used by the eNB 2330. Although Figure 23 illustrates the example in which eNB 2330 includes multiple antennas 2340, eNB 2330 can also include a single antenna 2340.

[0230] The base station apparatus 2350 includes a controller 2351, a memory 2352, a network interface 2353, an interface 2 3 5 radio-communication, and a connection interface 2 3b 1. The 2351 controller, 2352 memory, and the interface. 2353 are the same as controller 2221, memory 2222, and the network interface 2223 described with reference to Figure 22.

[0231] Radio communication interface 23555 supports any cellular communication scheme such as Evolution to

<img file="MX369904B_D0015.tif" />

Charge Puazo (LTL ·) and Advanced L'IF, and provide the RRH 2360 through the RRH 2360 and the 2340 antenna. The radio communication interface 2355 typically can also include, for example, a 2356 BB processor. The BBB 2356 processor is the same as the multiple BB 2226 processors described with reference to Figure 22, except that the 2356 BB processor is connected to the RF 2364 circuit of the RRH 2360 through the connecting 2357 interface. The communication interface 2355 can include the multiple BB 2356 processors, as illustrated in Figure 23. For example, the multiple BB 2356 processors may be compatible with the multiple frequency bands used by the eNB 2330. Although the

Figure 23 illustrates the radio communication example includes what

<img file="MX369904B_D0016.tif" />

[0232] Interface 2:

connect the 2350 radio communication device) to the RRH

0 can also be a

<img file="MX369904B_D0017.tif" />

in which the 2355 multi-processor BB 2356 interface, unication can also include

357 connection is a base station interface (interface 2355 of

2360. The communication module connection interface 2357 for the high-speed previously icac i base station apparatus 2350. or π} to 1 RR .n 2 or fe U.

veve an interface 2361 connection communication.

[0234] The connection interface 2361 is an interface for connecting the RRH 2360 (radio communication interface 2363) to the base station apparatus 2350. The connection interface 2361 can also be a communication module for communication on the high-speed line described above.

[0235] The radio communication interface 2363 transmits and receives radio signals through antenna 2340. The interface

2363 Radio communication typically can include, for example, RF circuit 2364. RF circuit 2364 can include, for example, a mixer, filter, and amplifier, and transmits and receives radio signals through antenna 2340. The interface Radio communication 2363 can include multiple RF 2364 circuits, as illustrated in Figure 23. For example, multiple 2364 RF circuits can support multiple antenna elements. Although Figure 23 shows the example in which the radio communication interface 2363 includes the multiple RF 2364 circuits, the radio communication interface 2363 may also include a single RF 2364 circuit.

[0236 'In the eNB 2200 and eNB 2330 illustrated in Figures 22 and 23, the transmit-receive unit 402 described using Figure 4 can be implemented via the radio communication interface 2225, and the radio communication interface 2355 and / or the radio communication interface 2363.

At least a part of the functions of the device at the end of the base station in the wireless communication system described above can also be implemented by controller 2221 and controller 2351.

Application Example Regarding User Equipment f 0237 J Figure 24 is a block diagram illustrating an example of a schematic configuration of a 2400 smart phone to which. The technology of the present description can be applied. The 2400 10 smart phone includes a 2401 processor, 2402 memory, 2403 storage, external connection interface 2404, 2406 camera, 2407 sensor, 2408 microphone,

2410 of radio input device 2409, a visual device 11 z a. cior ;, an 11 avcz 2411, an interraz z 4 1 z communication, one or more antenna switches 2415, one or more antennas 2416, a 2417 bus, a 2418 battery and an auxiliary 2419 controller.

[0238] Processor 2401 can be, for example, a CPU or a system-on-chip (SoC), and controls the functions of an application layer and will hear layer of the 2400 smart phone.

memory 2402 includes RAM and ROM, and stores a program that is executed by processor 2401, data. Storage 2403 may be a storage medium such as a semiconductor hard disk memory. The external connection interface 2404 is an interface for connecting an external device such as a memory card and a device of the universal intelligent transmission channel.

2406 It includes a charge coupled image sensor (CCD) and a complementary metal oxide semiconductor (CMOS), and generates an image (USB) to the phone 24u0 [0239 'The camera is not a closed device. Sensor 2407 can include a group of sensors such as a measurement sensor, a gyroscopic sensor, a cheomagnetic sensor, and an acceleration sensor. The microphone

2408 converts sounds entering the smart 2400 phone to audio signals. The device 2409 includes, for example, a touch sensor configured to detect touch on a screen of the display device 2410, a numeric keypad, a keyboard, a button, or an i O intC .il · '.LU p LO II · ¡Y '£ θ U l P Θ U^r 1 3 O p θ I. 3 (ó- í O [i O .1. F 1 í Θ b OQ Θ J. Γ1 Jl · OI. ΙΓ; 3 C ΐ O Π of a user. The 2410 display device include a screen such as a liquid crystal display (LCD), an organic light-emitting diode (OLED) screen, and displays an image from the smart phone 2400. The speaker

2411 converts audio signals coming out of the 2400 phone into sounds.

(024 0! The radio communication interface 24 12 supports any cellular communication scheme such as LTE and LTE

Go ahead, and carry out radio communication. The radio communication mtsrfaz 2412 typically can include, for example, a 2413 BB processor and an RF 2414 circuit. The BB 2413 processor can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various types of signal processing for radio communication. Meanwhile, RF circuit 2414 may include, for example, a mixer, filter, and amplifier, and transmits and receives radio signals through antenna 2416. Radio communication interface 2412 may be a chip module having the 2413 BB processor and the RF 2414 circuit integrated therein. Radio communication interface 2412 can include multiple BB 2413 processors and multiple RF 2414 circuits, as illustrated in Figure 24.

Although Figure 24 illustrates the example in which the interface

2412 radio communication includes the multiple processors

2413 BB and the multiple RF circuits 2414, the radio communication interface 2412 can also include a single BB processor

413 or a single RF 2414 circuit.

[0241j Also, in addition to a cellular communication scheme, the radio communication interface 2412 may support another type of radio communication scheme such as a short distance wireless communication scheme, a near field communication scheme, and a radio local area network (LAN) scheme. In that case, the interface

2412 Radio communication may include the 2413 BB processor and 2414 RF circuit for each radio communication scheme.

[0242] Each of the antenna switches 2415 switches the connection destinations of the antennas 2416 between the multiple circuits (such as circuits for different radio communication schemes) included in the radio communication interface 2412.

[0243 | Each of the antennas 24 16 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna), and is used for the radio-communication interface 2412 to transmit and receive 10 radio signals. The 2400 smart phone can include

<td></td><td colspan="2">the multiple antennas</td><td>&gt; 2416, as illustrated in Figure 24.</td>

<td></td><td>Even if</td><td>Figure 24 i</td><td>. illustrates the example in which the phone</td>

<td></td><td>24 00 ii</td><td>occludes rnú</td><td>1 triple antennas 2416, the telephone 2400</td>

<td></td><td>smart</td><td>also i</td><td>Includes a single 2416 antenna.</td>

<td> 15</td><td></td><td>0 2 4 4] In addition,</td><td>2400 smart phone can</td>

<td></td><td>I included r</td><td>1 aLena</td><td>2416 for each radio scheme-</td>

communication. In that case, the antenna switches 2415 can be omitted from the configuration of the smartphone 24 00.

<td></td><td>[0245] The</td><td>0 u S</td><td>2 4 17 connect</td><td>:to the</td><td>processor 2401, the</td>

<td>I died</td><td>a 2 4 () 2, the</td><td> 1.</td><td>storage</td><td> 2 4 03,</td><td>the 2404 interface of</td>

<td>connected</td><td>on external,</td><td></td><td>camera 2406,</td><td>he is</td><td>nsor 2 4 07, the. microphone</td>

<td> 24 08,</td><td>the ciisposit</td><td>i. vo</td><td>2409 input</td><td>to day,</td><td>the 2410 device</td>

<td>visua 1</td><td>hoisting, at</td><td>to 1</td><td>tayoz 2 4 11,</td><td>1 air</td><td>iterfaz 2412 radio-</td>

<td>common</td><td>cation, and &lt;</td><td>S 1</td><td>controller í</td><td> 14 19</td><td>help each other. 1st</td>

<img file="MX369904B_D0018.tif" />

2418 battery supplies power to the phone blocks

2400 smart illustrated in Figure 24 through supply lines, which are partially shown as broken lines in the figure. The auxiliary controller 2419 operates a minimum required function of the smart phone 2400, for example, in a sleep mode.

[0246] In the smart phone 2400 illustrated in Figure 24, the reference signal sending unit or the transmit-receive unit described using Figure 6 and Figure '! It can be implemented over the radio communication interface 2412. At least a part of the device functions at the end of the user equipment described above can also be implemented by the processor

2401 or the auxiliary 2419 controller.

[0247] The preferred embodiments of the present description are described with reference to the previous drawings, although the present description is of course not

<td>limited to</td><td>ex emplos</td><td>previous, those exper</td><td>cough</td><td>in the</td>

<td>technique can</td><td>to be made</td><td>various changes and ir.odificacic</td><td>month</td><td>inside</td>

<td>of scope c</td><td>ie the</td><td>attached claims,</td><td>and</td><td>shall</td>

<td> •^:5nt.ί *⁵πcc- c so ci ¹ j</td><td>these</td><td>changes and modifications</td><td>i tur.</td><td>armente</td>

fall within the technical scope of this description.

[0248] For example, in the above modes, multiple functions included in a unit can be implemented by separate devices. Alternatively, in the above embodiments, multiple functions implemented by multiple units can be implemented by separate devices. Furthermore, one of the above functions can be implemented by multiple units. As usual, such a configuration is included in the technical scope of the present description.

IO249j In the description, the steps described in the flowcharts not only include processing performed in a time sequence according to the order described, but also include processing currently or separately performed although not necessarily routinely. Furthermore, even even at the stages performed in the time sequence, as normal, the order can be changed appropriately.