Communication apparatus and communication method

The present invention relates to communication technology, and is particularly applied to a mobile communication system in which a mobile station device measures the reception quality of a signal received from the base station device and transmits reception quality information to the base station device. Base station equipment and mobile station equipment.

Recently, in mobile communication systems, the demand for data communication has been increasing, and various technologies have been proposed that can obtain high frequency utilization efficiency in response to the increase in communication data accompanying the increase. OFDMA (Orthogonal Frequency Division Multiple Access) is one of the technologies to improve frequency utilization efficiency. This OFDMA relates to a modulation method technology when all cells communicate using the same frequency in a communication area composed of cells, and high-speed data communication can be realized. In the scheduling of transmission packets in the OFDMA system, the mobile station device transmits CQI (Channel Quality Indicator), which is information indicating the reception quality of the downlink state in the broadband subcarrier, to the base station device, and the base station device moves each. A method of scheduling packets based on the CQI of a broadband subcarrier transmitted from a station device is known.

In addition, in the scheduling of transmission packets in an OFDM (Orthogonal Frequency Division Multiplexing) system using multiple subcarriers, each downlink channel state (frequency characteristics, that is, frequency-dependent transmission loss) in the mobile station device is used. We also know the technology of evaluating (characteristics such as), transmitting information obtained by quantizing each channel state to the base station device, and determining the subcarrier to be assigned to each mobile station device based on the transmitted information. (See Patent Document 1 below). FIG. 5 is a diagram showing an outline of a communication method between a conventional base station device and a mobile station device. FIG. 5 (A) is a diagram showing a system configuration example, and FIG. 5 (B) is a diagram showing a characteristic example. The mobile station device that received the downlink information 205 of the downlink used for the reception quality measurement from the base station device 201 measured and measured the reception quality (FIG. 5 (B)) of each channel based on the downlink information. By quantizing the reception quality of each channel, a channel profile of the propagation path is created.

The channel profile created by the mobile station device 203 is transmitted from the mobile station device 203 to the base station device 201 as reception quality information 207 using the uplink. Based on the reception quality information 207, the base station apparatus 201 performs processing such as adaptive modulation coding and frequency selection scheduling on the signal transmitted from the base station apparatus 201 to the mobile station apparatus 203.

Evolved Universal Terrestrial Radio Access, which is being studied by the 3GPP (3rd Generation Partnership Project), an international standardization project, regarding the transmission of reception quality information to base station equipment by this mobile station equipment. Then, a mobile station is used by using a dedicated uplink control channel (hereinafter referred to as PUCCH (Physical Uplink Control Channel)) and an uplink shared data channel (hereinafter referred to as PUSCH (Physical Uplink Shared Channel)). It is being considered to transmit from the device to the base station device. For example, in Non-Patent Document 1 below, when transmitting reception quality information from a mobile station device to a base station device, the reception quality required is different depending on the type of service, PUCCH or PUSCH is used. Proposals have been made to send information.

<p><patcit num="1"><text>Japanese Patent Application Laid-Open No. 2005-130491</text></patcit></p>

<p><nplcit num="1"><text>"CQI handling during DRX", 3GPP, TSG RAN WG2 Meeting # 58, R2-071901, May 2007</text></nplcit></p>

<p> However, in the conventional technique as described above, when the mobile station apparatus transmits the reception quality information using PUSCH, it is necessary to transmit the uplink data and the reception quality information at the same time. That is, the mobile station apparatus has a problem that the reception quality information cannot be transmitted by using PUSCH when the uplink data to be transmitted to the base station apparatus does not exist. Generally, the resource area allocated as PUCCH is smaller than the resource area allocated as PUSCH, so that the amount of reception quality information that can be transmitted using PUCCH is small. On the other hand, the reception quality information transmitted using PUSCH is the reception quality information having a large amount of information.</p><p> The base station apparatus performs processing such as adaptive modulation coding and frequency selection scheduling on the signal transmitted to the mobile station apparatus based on the reception quality information transmitted from the mobile station apparatus. When reception quality information with a small amount of information is transmitted from the mobile station device using PUCCH, the base station device performs highly accurate adaptive modulation coding and frequency selection scheduling according to the amount of information. The signal is transmitted to the mobile station apparatus without any processing such as the above, or only the processing of adaptive modulation coding. When reception quality information with a large amount of information is transmitted from the mobile station device using PUSCH, the base station device uses the information to perform highly accurate adaptive modulation coding, frequency selection scheduling, etc. Is processed and a signal is transmitted to the mobile station device.</p><p> In this way, when the reception quality information transmitted from the mobile station apparatus has a large amount of information, the base station apparatus can be used as a signal for transmitting processing such as highly accurate adaptive modulation coding and frequency selection scheduling. As a result, communication control (scheduling) between the base station device and the mobile station device can be performed more efficiently.</p><p> Here, the services provided between the mobile station device and the base station device include various types of services such as VoIP (voice call), WEB browsing, and videophone. As one of them, there is also a service that keeps downloading a large amount of data (UDP packets) such as moving images, and in this case, the uplink transmitted from the mobile station device to the base station device. There is no data.</p><p> In other words, in the conventional technology, in a service where there is no uplink data that keeps downloading a large amount of data (UDP packet) such as a moving image, a large amount of information is received from a mobile station device using PUSCH. Quality information cannot be sent. This cannot be applied to the signal to be transmitted in the base station apparatus such as high-precision adaptive modulation coding and frequency selection scheduling in the case of a service in which uplink data does not exist. This means that communication control (scheduling) between mobile station devices cannot be performed more efficiently.</p><p> Further, in the conventional technique, when the mobile station apparatus uses PUSCH to transmit only the reception quality information, the base station apparatus controls the mobile station apparatus using what kind of control information, and further, the base station apparatus is controlled. There was no specific description of what kind of exchange was performed between the mobile station and the mobile station device to transmit the reception quality information. In the transmission of reception quality information to the base station device by the mobile station device, there is a demand that the base station device wants to control the amount of information and the transmission frequency of the reception quality information transmitted from the mobile station device. The base station device should control the amount of received quality information to be transmitted and the transmission frequency in consideration of the uplink resources in the cell that it controls, and each mobile station device decides to receive a large size. If the quality information is transmitted frequently, the uplink resources in the cell will be insufficient, and if the received quality information having a small size is transmitted infrequently, the uplink resources will be wasted. That is, when the reception quality information is transmitted from the mobile station device to the base station device, what kind of control information is used from the base station device to control the mobile station device, and between the base station device and the mobile station device. What kind of exchange is performed to transmit the reception quality information is an important issue, and an efficient transmission control method considering the amount of information of the reception quality information to be transmitted and the transmission frequency is required.</p><p> The present invention has been made in view of such circumstances, and the reception quality having a large amount of information from the mobile station device even when there is no uplink data between the mobile station device and the base station device. By enabling information to be transmitted and performing transmission control flexibly corresponding to the amount of received quality information transmitted from the mobile station device and the transmission frequency, more efficient base station device and mobile station device can be transmitted. An object of the present invention is to provide a mobile communication system, a base station device, and a mobile station device capable of realizing communication control (scheduling).</p>

<p>(1) The present invention is a mobile communication system in which a mobile station apparatus transmits uplink data to a base station apparatus using an uplink shared data channel assigned by an uplink data transmission permission signal. The base station apparatus may transmit the first information that permits the uplink data transmission permission signal to transmit the reception quality information together with the uplink data, or the reception quality information without the uplink data. The second information to be permitted is transmitted to the mobile station device, and when the uplink data transmission permission signal includes the first information, the mobile station device receives the data together with the uplink data. When the quality information is transmitted to the base station apparatus using the uplink shared data channel and the uplink data transmission permission signal includes the second information, the uplink data is not accompanied. It is a mobile communication system characterized in that reception quality information is transmitted to the base station apparatus using the uplink shared data channel.</p><p>(2) Further, the present invention is a base station in a mobile communication system in which a mobile station apparatus transmits uplink data to a base station apparatus by using an uplink shared data channel assigned by an uplink data transmission permission signal. First information that allows the device to transmit reception quality information together with uplink data to the uplink data transmission permission signal.<u style="single">In the means for transmitting to the mobile station device including the above and the uplink data transmission permission signal,</u>Means of transmitting to the mobile station apparatus including a second information that allows transmission of reception quality information without uplink data.<u style="single">When,</u>It is a base station apparatus characterized by being provided with.</p><p>(3) Further, the present invention is a mobile station in a mobile communication system in which a mobile station apparatus transmits uplink data to a base station apparatus by using an uplink shared data channel assigned by an uplink data transmission permission signal. The device includes a means for receiving the uplink data transmission permission signal from the base station device and a first information for permitting the uplink data transmission permission signal to transmit reception quality information together with the uplink data. If it is included, the means for transmitting the reception quality information together with the uplink data to the base station apparatus using the uplink shared data channel, and the uplink data transmission permission signal without the uplink data. If a second piece of information is included that allows the receive quality information to be transmitted, the receive quality information is sent to the base station apparatus using the uplink shared data channel without the uplink data. It is a mobile station apparatus including a means for transmitting data.</p><p>(4) Further, the present invention is a base station in a mobile communication system in which a mobile station apparatus transmits uplink data to a base station apparatus by using an uplink shared data channel assigned by an uplink data transmission permission signal. First information that is a communication method of the device and permits transmission of reception quality information together with uplink data to the uplink data transmission permission signal.<u style="single">In the process of transmitting to the mobile station device including the above and the uplink data transmission permission signal,</u>The reception quality information is transmitted to the mobile station device including the second information that allows the transmission quality information to be transmitted without the uplink data.<u style="single">Process and selectively execute</u>It is a communication method characterized by this.</p><p>(5) Further, the present invention is a mobile station in a mobile communication system in which a mobile station apparatus transmits uplink data to a base station apparatus using an uplink shared data channel assigned by an uplink data transmission permission signal. The first information which is the communication method of the apparatus, which allows the uplink data transmission permission signal to be received from the base station apparatus, and to transmit the reception quality information together with the uplink data to the uplink data transmission permission signal. When is included, the reception quality information is transmitted to the base station apparatus using the uplink shared data channel together with the uplink data, and the uplink data transmission permission signal is not accompanied by the uplink data. If a second piece of information is included that allows the receive quality information to be transmitted, the receive quality information is transmitted to the base station apparatus using the uplink shared data channel without the uplink data. It is a communication method characterized by doing.</p>

<p> According to the present invention, reception quality information having a large amount of information can be transmitted from the mobile station device even when there is no uplink data between the mobile station device and the base station device, and is also transmitted from the mobile station device. Transmission control that flexibly corresponds to the amount of received quality information and transmission frequency is possible, and more efficient communication control (scheduling) between base station equipment and mobile station equipment can be realized.</p>

<figref num="1">It is a schematic block diagram which shows the structure of the base station apparatus by 1st Embodiment of this invention.</figref><figref num="2">It is a schematic block diagram which shows the structure of the mobile station apparatus by 1st Embodiment of this invention.</figref><figref num="3">It is a figure explaining the processing flow of the modification of the 1st Embodiment of this invention.</figref><figref num="4">It is a figure explaining the 2nd Embodiment of this invention, and the processing flow.</figref><figref num="5">It is a figure explaining the communication method of a general base station apparatus and mobile station apparatus.</figref>

(First Embodiment) First, the mobile communication system according to the first embodiment of the present invention will be described. The mobile communication system according to the present embodiment has a base station device and a mobile station device, and has the same configuration as in FIG. 5 (A). FIG. 1 is a functional block diagram showing a schematic configuration example of a base station apparatus according to the present embodiment. As shown in FIG. 1, the base station apparatus A includes a data control unit 1, a modulation coding unit 3, a mapping unit 5, an inverse fast Fourier transform (IFFT) unit 7, a radio transmission unit 11, a radio reception unit 15, and a high-speed Fourier. It includes a transform (FFT) unit 17, a demodulation / decoding unit 21, a data extraction unit 23, a transmission information control unit 27, and an antenna 31. The transmission information control unit 27 includes a scheduler unit 27a, a modulation code control unit 27b, and a frequency selection scheduler unit 27c.

In the base station device A, the data control unit 1 is input with the transmission data and the control data to be transmitted to each mobile station device, and each data is sequentially transmitted to the mobile station device according to the instruction from the transmission information control unit 27. Will be sent to. The modulation coding unit 3 performs modulation processing and error correction coding processing on the signal output from the data control unit based on the modulation method and coding rate determined by the transmission information control unit 27, and each data. Is output to the mapping section. The mapping unit maps the data output from the modulation coding unit 3 on each subcarrier based on the frequency selection scheduling information output from the transmission information control unit 27, and outputs the data to the inverse fast Fourier transform unit 7. ..

The inverse fast Fourier transform unit 7 performs an inverse fast Fourier transform process on the data output from the mapping unit 5, converts it into a time-series baseband digital signal, and outputs the data to the wireless transmission unit 11. The output signal from the inverse fast Fourier transform unit 7 is digitally / analog-converted by the wireless transmission unit 11, up-converted to a frequency suitable for transmission, and then transmitted to each mobile station device via the antenna.

The scheduler unit 27a performs downlink scheduling and uplink scheduling based on control information such as a resource area that can be used by each mobile station device, an intermittent transmission / reception cycle, a transmission data channel format, and a buffer status. The modulation code control unit 27b determines the modulation method and coding rate to be applied to each data based on the reception quality information transmitted from the mobile station apparatus. The frequency selection scheduler unit 27c performs frequency selection scheduling processing applied to each data based on the reception quality information transmitted from the mobile station apparatus. The data extraction unit 23 separates the demodulated and decoded data into reception data and control data for the user and passes them to a higher-level processing unit, and outputs reception quality information to the transmission information control unit 27.

FIG. 2 is a functional block diagram showing a schematic configuration example of a mobile station apparatus according to the first embodiment of the present invention. As shown in FIG. 2, the mobile station device B includes a data control unit 41, a modulation coding unit 43, a mapping unit 45, an inverse fast Fourier transform (IFFT) unit 47, a radio transmission unit 51, a radio reception unit 53, and a high-speed Fourier. It includes a transform (FFT) unit 55, a demodulation / decoding unit 57, a data extraction unit 61, a reception quality information control unit 63, and an antenna 65. The reception quality information control unit 63 includes a reception quality information generation unit 63a and a reception quality measurement unit 63b.

The wireless reception unit 53, the FFT unit 55, the demodulation / decoding unit 57, the data extraction unit 61, and the reception quality information control unit 63 constitute the reception unit as a whole, and the data control unit 41 and the modulation coding The unit 43, the mapping unit 45, the inverse fast Fourier transform (IFFT) unit 47, and the radio transmission unit 51 constitute a transmission unit as a whole.

In the mobile station device B shown in FIG. 2, the data control unit 41 inputs the transmission data to be transmitted to the base station device A and the control data, and each data is sequentially transmitted to the base station device. The modulation coding unit 43 performs modulation processing and error correction coding processing on the signal output from the data control unit 41, and outputs each data to the mapping unit 45. The mapping unit 45 maps the data output from the modulation coding unit 43 on each subcarrier and outputs the data to the inverse fast Fourier transform unit 47.

The inverse fast Fourier transform unit 47 performs an inverse fast Fourier transform process on the symbol sequence output from the mapping unit 45, converts it into a time-series baseband digital signal, and outputs it to the wireless transmission unit 51. The output signal from the inverse fast Fourier transform unit 47 is digitally / analog-converted in the radio transmission unit, up-converted to a frequency suitable for transmission, and then transmitted to the base station apparatus A via the antenna.

The reception quality measuring unit 63b measures the reception quality of the signal received from the base station apparatus A. The reception quality information generation unit 63a generates reception quality information to be transmitted to the base station apparatus A based on the information measured by the reception quality measurement unit 63b.

FIG. 3 is a diagram for explaining a communication technique according to the first embodiment of the present invention. In the left figure of FIG. 3, the control signal (L1 / L2 grant) transmitted from the base station device to the mobile station device, the reception quality information, the uplink data, the transmission form of the information transmitted by the uplink, in the right figure, The processing flow corresponding to each slot is shown. In FIG. 3, the operations from # slot1 to # slot12 are shown as an example.

The mobile station apparatus B uses PUSCH to transmit data according to the resource allocation indicated by the downlink control channel (hereinafter, PDCCH (Physical Downlink Control Channel)) from the base station apparatus A. That is, this downlink control channel (PDCCH) is a signal (uplink data transmission permission signal, hereinafter referred to as L1 / L2 grant) that permits data transmission to the uplink. This L1 / L2 grant is, for example, resource allocation information (10 bits), MCS (Modulation and Coding Scheme, modulation coding method) (2 bits), transport block size (6 bits), HARQ (Hybrid Automatic Repeat Request,) Hybrid automatic repeat request) Redundancy version (2 bits), demodulated pilot signal strength (2 bits), mobile station identification information C-RNTI (16 bits).

In the first embodiment of the present invention, the base station apparatus A is connected to the L1 / L2 grant containing the reception quality information transmission permission information that allows the mobile station apparatus B to transmit the reception quality information. The mobile station device B that transmits including the reception quality information dedicated transmission permission information that permits transmission of only reception quality information using the resources allocated by the L2 grant and receives the signal is the L1 / L2 grant. Only the reception quality information is transmitted to the base station apparatus A using the resource allocated in. (# Slot4, # slot7, # slot12 in Fig. 3 correspond.) The operation in each slot will be described with reference to FIG.

In # slot2, the base station device A, which has determined to instruct the mobile station device B to transmit the reception quality information, uses the permission information (hereinafter referred to as "reception quality information transmission permission information"). For example, the L1 / L2 grant set to 1 is transmitted to the mobile station device B (71). Hereinafter, in the embodiment of the present invention, the base station apparatus represents the reception quality information transmission permission information by 1-bit information as an example, and sets 1 when permitting the transmission of the reception quality information. To prevent the reception quality information from being transmitted, set "0" to transmit the L1 / L2 grant. In the present embodiment, such a setting is made in order to make the explanation easy to understand, but of course, another setting method may be used. The mobile station device B that has received the L1 / L2 grant whose reception quality information transmission permission information is set to 1 uses the resources allocated by the L1 / L2 grant to send the reception quality information at the same time as the uplink data. Send to base station device A (72).

In # slot3, a normal L1 / L2 grant is transmitted from the base station device A to the mobile station device B (73), and the mobile station device B that receives the signal transfers the resources allocated by the L1 / L2 grant. It is used to send uplink data to base station equipment A (74).

Next, the operation of # slot4 will be described.

In # slot4, the base station device A that determines that the mobile station device B is permitted to transmit only the reception quality information is referred to as the designated information (hereinafter, "reception quality information dedicated transmission permission information". ) Is transmitted to the mobile station device B, for example, the L1 / L2 grant set to 1 (75). Hereinafter, in the embodiment of the present invention, the base station apparatus represents the reception quality information dedicated transmission permission signal by 1-bit information as an example, and sets 1 when permitting transmission of only reception quality information. However, in order not to send only the reception quality information, set "0" and send the L1 / L2 grant. In the present embodiment, such a setting is made in order to make the explanation easy to understand, but of course, another setting method may be used. The mobile station device B that has received the L1 / L2 grant for which the transmission permission information for exclusive use of reception quality information is set to 1 transmits only the reception quality information to the base station device A using the allocated resources (76). ). However, the mobile station apparatus B transmits the reception quality information and the ACK / NACK when it is necessary to transmit the HARQ ACK / NACK for the downlink data.

Here, the L1 / L2 grant transmitted from the base station apparatus in # slot2, # slot3, and # slot4 in the first embodiment will be further described. The L1 / L2 grant transmitted by # slot2, # slot3, and # slot4 always contains the reception quality information transmission permission information and the reception quality information dedicated transmission permission information. That is, the L1 / L2 grant always contains 2-bit information. The base station device sets the 2-bit information, reception quality information transmission permission information to "1" in # slot2, reception quality information dedicated transmission permission information to "0", and reception quality information transmission permission information in # slot3. Is set to "0", and the transmission permission information dedicated to reception quality information is set to "0". In # slot4, the reception quality information transmission permission information is set to "1", and the reception quality information dedicated transmission permission information is set to "1". In the explanations of slot2, # slot3, and # slot4 described above, only the information set to "1" is described for the sake of clarity, but in the first embodiment, The L1 / L2 grant always contains 2-bit information of reception quality information transmission permission information and reception quality information dedicated transmission permission information. Hereinafter, in the description of the examples of the present invention, only the information basically set to "1" will be described in order to make the description easy to understand.

In FIG. 3, similarly, in # slot6, # slot9, and # slot10, the L1 / L2 grant in which the reception quality information transmission permission information is set to 1 is transmitted from the base station device A, and the mobile station device receives the signal. It is shown that B uses the allocated resource to send the received quality information to the base station device A at the same time as the uplink data (78, 82, 84). Also, in # slot11, a normal L1 / L2 grant is transmitted from the base station device, and mobile station device B that receives the signal transmits uplink data to base station device A using the allocated resources. It shows that (86). Also, in # slot7 and # slot12, the L1 / L2 grant with the reception quality information dedicated transmission permission information set to "1" is transmitted from the base station device to the mobile station device B, and the mobile station device that receives the signal receives the signal. It indicates that only the reception quality information is transmitted to the base station device A (80/88). In # slot7 and # slot12, even if the uplink data exists in the information transmitted by the mobile station device B using the uplink, only the reception quality information is transmitted to the base station device A.

In FIG. 3, reference numerals 105 to 140 indicate the existence of each data in each slot. The L1 / L2 grants of # slot2, # slot6, # slot9, and # slot10 are represented by horizontal hatches because the base station device A sets the reception quality information transmission permission information to 1 and the reception quality information transmission permission only. It indicates that the L1 / L2 grant with the information set to 0 is being transmitted, and the L1 / L2 grants of # slot4, # slot7, and # slot12 are shown in black because the base station device A It indicates that the L1 / L2 grant is transmitted with the reception quality information transmission permission information set to "1" and the reception quality information dedicated transmission permission information set to "1".

In addition, the transmission modes of # slot2, # slot6, # slot9, and # slot10 are indicated by diagonal lines (similar to reception quality information) and white frames (similar to uplink data) because mobile station device B has reception quality. It indicates that the information is transmitted to the base station device A at the same time as the uplink data, and the transmission form of # slot4, # slot7, and # slot12 is represented by a grid pattern only for the mobile station device B to receive the reception quality information. Is transmitted to the base station device A.

The processing flow corresponding to each slot will be described with reference to the right figure of FIG.

In # slot2, base station device A transmits the L1 / L2 grant with the reception quality information transmission permission information set to 1 (71). Upon receiving this signal, the mobile station apparatus B uses the allocated resource to transmit the reception quality information at the same time as the uplink data (72). The same processing is performed for # slot6, # slot9, and # slot10.

At # slot3, base station device A transmits a normal L1 / L2 grant (73). Upon receiving this signal, mobile station apparatus B transmits uplink data using the allocated resource (74). The same processing is performed in # slot11.

In # slot4, the base station device A transmits the L 1 / L 2 grant in which the transmission permission information dedicated to the reception quality information is set to 1 (75). Upon receiving this signal, mobile station equipment B uses the allocated resources to transmit only reception quality information to the base station equipment (76). In # slot7 and # slot12, even if the uplink data exists in the information transmitted by the mobile station device B using the uplink, only the reception quality information is transmitted to the base station device A.

Further, the transmission permission information dedicated to the reception quality information included in the L1 / L2 grant can be represented by other information included in the L1 / L2 grant without adding a new information bit. For example, set all HARQ redundancy version values for uplink data contained in the L1 / L2 grant to 0, or set all MCS values for uplink data to 0, or set the transport block size for upper link data. By setting it to 0, it is possible to represent the transmission permission information dedicated to the reception quality information. The fact that these values are set to 0 indicates that the L1 / L2 grant from the base station device does not require any uplink data to be transmitted from the mobile station device. Upon receiving this signal, the mobile station apparatus recognizes that the L1 / L2 grant from the base station apparatus is not a normal L1 / L2 grant, and transmits only the reception quality information to the base station apparatus.

That is, in # slot4, # slot7, and # slot12 in FIG. 3, the HARQ redundancy version values for the uplink data from the base station device A are all set to 0, or the MCS values for the uplink data are all set to 0. Alternatively, an L1 / L2 grant with the transport block size set to 0 for the upper link data is transmitted, and the mobile station device B that receives the signal uses only the reception quality information using the resources allocated by the L1 / L2 grant. To base station device A. At this time, the reception quality information transmission permission information is set to "1". Which information contained in the L1 / L2 grant transmitted from the base station device A, and what kind of setting the information should be used for the mobile station device B to transmit only the reception quality information. Is determined in advance according to the specifications and the like, and is set as known information between the base station device A and the mobile station device B. In this way, by expressing the reception quality information dedicated transmission permission information using other information included in the L1 / L2 grant, a new information bit is added to the L1 / L2 grant as the reception quality information dedicated transmission permission information. It is not necessary, and only the reception quality information can be transmitted from the mobile station device B to the base station device A without increasing the amount of information contained in the L1 / L2 grant.

As described above, according to the first embodiment of the present invention, the L1 / L2 grant including the reception quality information dedicated transmission permission information that allows the base station apparatus to transmit only the reception quality information. Is transmitted, and the mobile station apparatus that has received the signal transmits only the reception quality information to the base station apparatus, so that the mobile station apparatus can transmit only the reception quality information.

The mobile station equipment transmits the reception quality information using the resources allocated by the L1 / L2 grant including the reception quality information dedicated transmission permission information from the base station equipment, so that the reception quality has a large amount of information. Information can be sent. This makes it possible to transmit reception quality information with a large amount of information from the mobile station device even in a service that does not have uplink data such as moving images that continue to download a large amount of data (UDP packets). It becomes.

In addition, since the mobile station device transmits only the reception quality information by including the reception quality information dedicated transmission permission information that allows the mobile station device to transmit only the reception quality information in the L1 / L2 grant, the mobile station device transmits only the reception quality information. The base station equipment can control the frequency of operation.

This enables transmission control that flexibly corresponds to the amount of received quality information transmitted from the mobile station device and the transmission frequency, and realizes more efficient communication control (scheduling) between the base station device and the mobile station device. can do. (Second embodiment) FIG. 4 is a diagram for explaining a communication technique according to a second embodiment of the present invention. In the left figure of FIG. 4, the control signal (L1 / L2 grant) transmitted from the base station device to the mobile station device, the reception quality information, the uplink data, the transmission form of the information transmitted by the uplink, and in the right figure, The processing flow corresponding to each slot is shown. In FIG. 4, the operations from # slot1 to # slot12 are shown as an example.

In the second embodiment of the present invention, the base station apparatus transmits RRC signaling including reception quality information transmission instruction information to the mobile station apparatus. Further, the base station apparatus transmits the L1 / L2 grant including the reception quality information transmission permission information that permits the mobile station apparatus to transmit the reception quality information to the mobile station apparatus. Here, the reception quality information transmission instruction information is, as will be described later, the reception quality information transmission permission information (information that specifies that the reception quality information is transmitted) and the reception quality information dedicated transmission permission information (reception quality information only). Information that specifies to be used as). Reference numerals 161 to 199 have the same meanings as those in FIG.

The operation in each slot will be described with reference to FIG. Prior to # slot1, the mobile station device B received the L1 / L2 grant in which the reception quality information transmission permission information was set to "1" in the reception quality information transmission instruction information by RRC signaling from the base station device A. If so, it is specified to send the received quality information to the base station equipment.

As described in the first embodiment, the base station device A that determines in # slot2 to instruct the mobile station device B to transmit the reception quality information receives the reception quality information transmission permission information. Is set to 1 and the L1 / L2 grant is transmitted to the mobile station device B (141). The mobile station device B that has received the L1 / L2 grant including the reception quality information transmission permission information sends the reception quality information to the base station device A at the same time as the uplink data using the resources allocated by the L1 / L2 grant. Send (142). In # slot3, a normal L1 / L2 grant is transmitted from the base station device A to the mobile station device B (143), and the mobile station device B that receives the signal transfers the resources allocated by the L1 / L2 grant. It is used to send uplink data to base station equipment A (144).

In FIG. 4, similarly, in # slot4 and # slot6, the L1 / L2 grant in which the reception quality information transmission permission information is set to 1 is transmitted from the base station device A, and the mobile station device B that receives the signal is transmitted. , Indicates that uplink data and reception quality information are being transmitted to the base station equipment at the same time using the allocated resources (146, 148).

Next, the operation of # slot8 will be described. In # slot8, the base station device A specifies the mobile station device B to use the reception quality information transmission permission information as the reception quality information dedicated transmission permission information by RRC signaling including the reception quality information transmission instruction information (149). ).

Here, the reception quality information transmission instruction information will be described. In the second embodiment of the present embodiment, the mobile station apparatus B that has received the RRC signaling including the reception quality information transmission instruction information transmits the reception quality information included in the L1 / L2 grant transmitted from the base station apparatus A. The permission information is interpreted as the transmission permission information dedicated to the reception quality information. For example, if the base station apparatus A indicates the reception quality information transmission permission information by the information bit A, it is indicated by the same information bit A after receiving the RRC signaling including the reception quality information transmission instruction information. The information becomes the transmission permission information dedicated to the reception quality information.

This point will be described with reference to FIG. In FIG. 4, the base station device transmits the reception quality information by setting the information bit A indicating the reception quality information transmission permission information to 1 in # slot2, # slot4, and # slot6. Suppose you have given permission to do so. Upon receiving this signal, the mobile station apparatus B transmits the reception quality information at the same time as the uplink data. Base station device A transmits RRC signaling including reception quality information transmission instruction information in # slot8 (149). Further, the base station device A sets the same information bit A indicating the reception quality information transmission permission information to 1 in # slot9, # slot10, and # slot12, so that the mobile station device B receives the reception quality. You can give permission to send only information. That is, the same 1-bit information (information bit A) is transmitted by transmitting RRC signaling to the reception quality information transmission permission information and the reception quality information dedicated transmission permission information represented as 2-bit information in the first embodiment. ") Can also be used. It can be said that the reception quality information transmission instruction information included in the RRC signaling from the base station apparatus A is information for switching the interpretation of the reception quality information transmission permission information to the reception quality information dedicated transmission permission information.

In # slot 9 in FIG. 4, the base station device A transmits the L1 / L2 grant whose reception quality information transmission permission information is set to 1, and the mobile station device B that receives the signal uses the uplink. Although the uplink data exists in the information to be transmitted, only the reception quality information is transmitted to the base station apparatus A (153). That is, in the slot after the RRC signaling including the reception quality information transmission instruction information is transmitted, the mobile station device B that has received the L1 / L2 grant in which the reception quality information transmission permission information is set to 1 goes up. Even if the uplink data is present in the information transmitted using the link, the uplink data is not transmitted to the base station apparatus A. Similarly, in FIG. 4, in # slot12, the mobile station device B that has received the L1 / L2 grant whose reception quality information transmission permission information is set to 1 transmits only the reception quality information to the base station device. Yes (157).

In # slot10, the L1 / L2 grant whose reception quality information transmission permission information is set to 1 is transmitted from the base station device A to the mobile station device B (152), and the mobile station device B that receives the signal receives the signal. It shows that only the reception quality information is transmitted to the base station apparatus A using the resources allocated by the L1 / L2 grant (153).

In # slot11, a normal L1 / L2 grant is transmitted from the base station device A to the mobile station device B (154), and the mobile station device B that receives the signal uses the resources allocated by the L1 / L2 grant. Then, the uplink data is transmitted to the base station apparatus A (155).

Next, the processing flow corresponding to each slot will be described. In # slot2, base station device A transmits the L1 / L2 grant with the reception quality information transmission permission information set to 1 (141). Upon receiving this signal, the mobile station apparatus B uses the allocated resource to transmit the reception quality information at the same time as the uplink data (142). The same processing is performed for # slot4 and # slot6.

At # slot3, the base station device sends a normal L1 / L2 grant (143). Upon receiving this signal, mobile station apparatus B transmits uplink data using the allocated resource (144). The same process is performed for # slot11.

In # slot8, the base station apparatus A transmits RRC signaling including the reception quality information transmission designation information (149), and specifies that the reception quality information transmission permission information is used as the reception quality information dedicated transmission permission information. Upon receiving this signal, the mobile station apparatus B determines that the reception quality information transmission permission information from the subsequent slots is the reception quality information dedicated transmission permission information. (Switch the interpretation.)

In # slot9, the base station device A transmits the L1 / L2 grant in which the reception quality information transmission permission information is set to 1 (150). Upon receiving this signal, the mobile station apparatus B uses the allocated resources to receive only the reception quality information even though the uplink data exists in the information transmitted using the uplink. Send to A (151). The same process is performed for # slot12.

In # slot10, the base station device A transmits the L1 / L2 grant in which the transmission permission information dedicated to the reception quality information is set to 1 (152). Upon receiving this signal, mobile station device B uses the allocated resources to transmit only reception quality information to base station device A (153).

As described above, according to the second embodiment of the present invention, the base station apparatus transmits RRC signaling including the reception quality information transmission designation information, and the mobile station apparatus that receives this signal receives the signal. By specifying that the reception quality information transmission permission information is used as the reception quality information dedicated transmission permission information, only the reception quality information can be received from the mobile station device B without increasing the amount of information contained in the L1 / L2 grant. It becomes possible to transmit to the base station device A.

The mobile station device transmits the reception quality information using the resources allocated by the L1 / L2 grant including the reception quality information transmission permission information from the base station device, so that the reception quality information has a large amount of information. Can be sent. This makes it possible to transmit reception quality information with a large amount of information from the mobile station device even in a service that does not have uplink data such as moving images that continue to download a large amount of data (UDP packets). It becomes.

In addition, since the reception quality information transmission permission information that allows the mobile station device to transmit the reception quality information is included in the L1 / L2 grant and transmitted to the mobile station device, the frequency with which the mobile station device transmits the reception quality information can be determined. It can be controlled by the base station equipment.

This enables transmission control that flexibly corresponds to the amount of received quality information transmitted from the mobile station device and the transmission frequency, and realizes more efficient communication control (scheduling) between the base station device and the mobile station device. can do.

In the second embodiment of the present invention, the RRC signaling including the reception quality information transmission instruction information from the base station device is, for example, a service performed between the mobile station device and the base station device. It is transmitted when switching from a service that has uplink data to a service that does not have a large amount of uplink data that keeps downloading a large amount of data (UDP packets) such as moving images.

All embodiments of the present invention include transmission of SDM (Space Division Multiplexing), SFBC (Space-Frequency Block Diversity), CDD (Cyclic Delay Diversity), etc. using MIMO communication (Multiple Input Multiple Output). It can also be applied to diversity, and the reception quality information in this embodiment includes the number of streams that can be received by the mobile station device (RANK information) during MIMO communication, and a plurality of streams transmitted from the base station device. Includes index information (PMI (Pre-coding Matrix Index) information) that indicates pre-processing (Pre-coding) information that is applied in advance to correctly separate the data.

Although each embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and claims for design and the like within a range not deviating from the gist of the present invention are also claimed. Is included in the range of.

The present invention can be used in communication devices.

A ... base station equipment, B ... mobile station equipment, 27 ... transmission information control unit, 27a ... scheduler unit, 27b ... modulation code control unit, 27c ... frequency scheduler unit, 63 ... reception quality information control unit, 63a ... reception quality information generation unit, 63b ... reception quality measurement unit.