Method and apparatus for providing and utilizing a non-contention based channel in a wireless communication system
Abstract
In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.
Term
0.4 yearsto projected expiry
Projected expiry 31 January 2027, counted from filing; an application has no term until it is granted.
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1 claim: 1 independent, 0 dependent
- 1Zastrzeżenia patentowe 1. Sposób zaimplementowany przez bezprzewodową jednostkę nadawczo-odbiorczą, WTRU (120), który to sposób obejmuje etapy odbierania pierwszego przydziału z rozwiniętego węzła typu Node-B, eNB (110), przy czym pierwszy przydział jest przydziałem kanału sterowania łącza uplink opartego na braku rywalizacji, NCB, przy czym pierwszy przydział obejmuje
378 paragraphs in 114 sections, as filed
Description
FIELD OF THE INVENTION
The present invention relates to wireless communication systems. More particularly, the present invention relates to a method and apparatus for providing and using a non-contention channel in a wireless communication system.
BACKGROUND OF THE INVENTION
[0002] The Long Term Evolution (LTE) - (Long Term Evolution) of the Third Generation (3G) Cellular Code Division Multiple Access (WCDMA) - (Wideband Code Division Multiple Access) is geared towards the Universal System for Mobile Communications (UMTS) - (Universal Mobile
Telecommunications Systems) under the consortium called Third Generation Partnership Project (3GPP) Issue 7. Long-term evolution of LTE may also be referred to as UMTS (E-UTRA) evolved terrestrial radio access (evolved UMTS Terrestrial Radio Access). One of the main technological challenges of such networks is the effective use of the channel with varying levels of traffic in the system. This can be a particular challenge when different types of traffic use different transmission protocols such as Voice over Internet Protocol (VoIP) - (Voice over Internet Protocol), File Transfer Protocol (FTP) - (File Transfer Protocol) or hypertext transfer protocol ( HTTP) - (Hypertext Transfer Protocol). For example, in any particular wireless communication system, there can be multiple VoIP users, FTP users, and HTTP users all transmitting simultaneously.
In addition, Wireless Transmit Receive Units (WTRUs) in the system perform a variety of tasks and functions that require access to a transmission medium to communicate with a base station.
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For example, the WTRUs need to perform functions such as look ahead, report measurements, request uplink physical resource allocation (UL), provide scheduling information for downlink (DL) allocation, keep heartbeat active, Hybrid Automatic Repeat Request (HARQ) feedback and / or Medium Access Control (MAC) or Radio Resource Control (RRC) layer signaling.
[0004] WTRUs in a wireless communication system could use a Random Access Channel (RACH) or a Physical RACH (PRACH) to communicate with a base station to perform these functions. J. , the RACH channel is a contention-based channel, and its use causes delays that affect the Quality of Service (QoS) and may result in inefficient use of physical resources. Relying on the RACH channel for interactive applications between transmissions can also negatively impact system performance.
[0005] Alternatively, the WTRU could use a UL shared channel to perform these functions. However, a UL shared channel resource request would first need to be forwarded on the RACH / PRACH channel, which would be resource inefficient and would cause delays in performing these functions due to the two step procedure.
[0006] In the LTE context, it would be desirable to use an access protocol such as Non-Contention Based (NCB) channel, which may also be referred to as thin or dedicated channel. Thin channels are typically contention-free or have a low level of competition, and the control channels are used primarily to access them.
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[0007] It would therefore be advantageous to provide a method and apparatus for providing and using an NCB channel that is not limited by the limitations of the prior art.
WO 03/024028 A1 discloses a Wireless Local Area Network (CC) - (Central Controller) - (Wireless Local Area Network) in combination with an association operation with a mobile terminal and upon receipt from a mobile terminal ( MT) - (Mobile Terminal) of the first control signal (CS1) - (Control Signal) the sequence of control signals involved in the association operation, pre-reserves the MAC resource for transmitting at least another control signal in sequence. MAC resources for the next control signal are pre-reserved before information for the next control signal which is stored in the transmission buffer of the mobile terminal. Indeed, given the nature of the first control signal, Central Controller anticipates the eventuality of another control signal and pre-reserves MAC resources for the next control signal. Central Controller pre-reserves MAC resources to avoid transmitting a separate message to request MAC resources for another control signal. In fact, in a preferred embodiment, the Central Controller pre-reserves MAC resources for the rest of the control signals in the sequence. The association operation for which a pre-reservation occurs can be, for example, an initial association scenario or a handover scenario in which a mobile terminal (MT) - (Mobile Terminal) is communicated to a central controller (CC) - (Central Controller).
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WO 2005/039134 discloses embodiments relating to MAC processing for efficient use of high bandwidth systems. In one aspect, a protocol stack is disclosed comprising one or more of the following layers: an adaptation layer, a data link control layer, a physical layer, and a layer manager. In another aspect, physical layer feedback is used to process the adaptation layer. In one embodiment, physical layer feedback is used for segmentation. In another embodiment, physical layer feedback is used for multicast mapping onto one or more unicast channels. In another aspect, a data unit for transmission from a first station to a second station comprises zero or more complete submissions, zero or one partial submissions from previous transmission, and zero or one partial submissions to fill the data unit. In one embodiment, the pointer may be used to indicate the location of any complete subjects.
WO 01/61878 discloses a method for indicating the end of data frame transmission to enable UTRAN (Universal Mobile Telecommunications Systems) Terrestrial Radio Access Network (UMTS) to assign a common packet channel to another user equipment (UE). ) - (User Equipment) in the UE for a CDMA Mobile Communication System. The UE requests assignment of any one of a plurality of common packet channels assignable in the UTRAN; The UE is assigned to the common packet channel by the UTRAN in response to the request; The UE sequentially transmits the data frames and their associated control frames over the assigned common
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- 5 packet channel; and the UE transmits at least one control frame in the designated field for which the given bit pattern determined from the UTRAN is registered to inform the UTRAN of the end of the data transmission after the end of data transmission through the data frames.
US 2005/238053 discloses, in addition to dedicated channel forming units 101-1 to 101-N, a provided control information channel signal forming unit 110, which control information channel signal forming unit 110 forms control information for performing a packet transmission. uplinks. The control information channel signal forming unit 110 multiplexes the control information (RG information, ACK / NACK etc.) directed to a plurality of communication terminals via a section 111 coding a channel according to a multiplexing rule predefined between the base station apparatus and each communication terminal, and spreading the control information using a spreading code common to communication terminals via spreading section 113 and creating thus a control information channel signal for uplink packet transmission.
SUMMARY OF THE INVENTION
The present invention is directed to establishing, maintaining and using a Non-Contention Based (NCB) channel in a wireless communication system including at least one evolved Node-B (eNB) - (evolved Node-) B) and a plurality of Wireless Transmit Receive Unit (WTRU). Each NCB channel is dedicated and allocated to be used by a specific WTRU in the system for use in various functions, and the allocation is transferred to the WTRUs in the system by the eNB. The wireless communication system analyzes
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Each NCB channel is allocated as needed, and each NCB channel is reallocated as needed.
SHORT DESCRIPTION OF THE DRAWINGS
A more detailed understanding of the invention can be obtained from the following description of a preferred embodiment, given by way of example and in conjunction with the accompanying drawings, in which:
Figure 1 illustrates an exemplary wireless communication system configured in accordance with the present invention;
Figure 2 shows a functional block diagram of an eNB and WTRU of the wireless communication system of Figure 1;
Figure 3 is a flowchart of a method for establishing and maintaining a Non-Contention Based (NCB) channel with a specific WTRU, in accordance with the present invention;
Figure 4 depicts an exemplary time frequency diagram illustrating the allocation of an NCB channel to multiple WTRUs, in accordance with the present invention;
Figure 5 is a flowchart of a time advance determination method using an NCB channel in accordance with the present invention;
Figure 6 is a flowchart of a method for determining a scheduling modification using an NCB channel, in accordance with another embodiment of the present invention;
Figure 7 is a flowchart of a resource allocation method using an NCB channel, in accordance with another embodiment of the present invention;
Figure 8 is an exemplary time frequency diagram illustrating the allocation of resources according to the method of Figure 6;
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Figure 9 is an exemplary block diagram showing a frequency differentiated NCB channel assignment in a multi-sub-channel system, in accordance with the present invention;
Figure 10 depicts an exemplary time frequency diagram illustrating an NCB channel allocation with time and frequency hopping, in accordance with an embodiment of the present invention; and
Figure 11 is an exemplary diagram showing various NCB channel requirements for a WTRU, according to an embodiment of the present invention.
DETAILED DESCRIPTION OF PREFERRED EXAMPLES
[0014] Hereinafter, the terminology "Wireless Transmit Receive Unit (WTRU)" includes User Equipment (UE), Mobile Station (STA) - (Mobile Station), mesh (MP) - (Mesh Point), fixed or mobile subscriber unit, pager, mobile phone, personal digital assistant (PDA) - (Personal Digital Assistant), a computer or any other type of user device capable of operating in a wireless environment, but not limited to the devices listed. Hereinafter, the terminology "base station" includes a Node-B, a site controller, an Access Point (AP), or any other type of interface device capable of operating in a wireless environment, but is not limited to the devices listed. .
Overall, the present invention is directed to a method and apparatus for establishing, maintaining and using Non-Contention Based (NCB) dedicated channels. NCB channels, in a preferred embodiment of the present invention, are channels that are dedicated to a specific WTRU to
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- 8 uses at any given time and can be reallocated according to system needs. Utilization of the NCB channel can help to avoid delays and inefficient use of physical resources associated with the UL contention based procedure, and may also be used in downlink or ad hoc networks.
Figure 1 illustrates an exemplary wireless communication system 100 (also referred to below as system) configured in accordance with the present invention. Wireless communication system 100 includes a plurality of evolved Node-B (eNB) - (evolved Node-B) 110 (denoted as eNB1 and eNB2) and a plurality of WTRU 120 (denoted as WTRU1, WTRU2, WTRU3, and WTRU4), in wireless communication with eNB 110 nodes. The WTRUs 120 depicted in the wireless communication system 100 may include any combination of WTRUs such as STAs, MPs, and the like. In a preferred embodiment, the eNBs 110 provide network access to WTRUs 120 (WTRU1, WTRU2, WTRU3, and WTRU4) in communication with them. As shown in the exemplary configuration in Figure 1, the WTRU1, WTRU2 and WTRU3 are currently in communication with a node of the eNB1 type, while the WTRU4 is currently in communication with the node of the eNB2 type. However, any of the WTRUs 120 may be in communication with any of the eNBs 110, except as shown in Figure 1.
Figure 2 shows a functional block diagram of a eNB 110 and WTRU 120 of the wireless communication system 100 of Figure 1. As shown in Figure 2, the eNB 110 and WTRU 120 are in wireless communication with each other and are configured to be used. an NCB channel in a wireless communication system 100. In one example, the WTRU 120 may be a mobile STA or
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- 9 MP in communication with the eNB 110 which provides network access for the WTRU 120.
[0018] In addition to the components found in a typical eNB, the eNB 110 includes a processor 115, a receiver 116, a transmitter 117, and an antenna 118. The processor 115 is configured to establish, maintain, and use an NCB channel in accordance with the present invention. Receiver 116 and transmitter 117 are in communication with processor 115. Antenna 118 is in communication with both receiver 116 and transmitter 117 to facilitate transmission and reception of wireless data.
Similarly, in addition to the components found in a typical WTRU, the WTRU 120 includes a processor 125, a receiver 126, a transmitter 127, and an antenna 128. The processor 125 is configured to establish, maintain, and use an NCB channel in accordance with the present invention. Receiver 126 and transmitter 127 are in communication with processor 125. Antenna 128 is in communication with both receiver 126 and transmitter 127 to facilitate transmission and reception of wireless data.
Figure 3 is a flowchart of a method 300 for establishing and maintaining an NCB channel with a specific WTRU in accordance with the present invention. In step 310, the NCB channel is established and allocated. The NCB channel may be configured by a node of type eNB 110. For example, the network operator may identify certain Radio Resource Management (RRM) parameters that are used by the eNB 110 to determine the NCB channel configuration and when it is established and reconfigured.
[0021] During the establishment of an NCB channel, channel duration and periodicity may be configured. In a preferred embodiment, the duration may be infinite. Additionally, the system or WTRU 120 may be able to terminate or reconfigure the allocated NCB channel. In the infinite
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In the event, signaling from either the eNB 110 or the WTRU 120 may complete the NCB channel allocation.
[0022] The NCB channel may be allocated to a specific WTRU 120 for a given duration. The duration may be a time subset for the WTRU 120 to use the NCB channel, or the WTRU 120 may be assigned a periodic interval to use the NCB channel. It should also be noted that any combination of the above grants may be used, and the durations and / or the recurring operation may include allocated physical resources that are time multiplexed from among a plurality of WTRU 120.
[0023] Wireless communication system 100 may use a number of characteristics in configuring the NCB channel. For example, the NCB channel may be configured to support functions such as time advance, measurement reporting, UL physical resource request, information provision for DL resource scheduling, heartbeat keep alive, Hybrid Automatic Repeat Reguest (HARQ) feedback and / or Medium Access Control (MAC) or Radio Resource Control (RRC) layer signaling, all of which are described in this document below. In addition, the NCB channel may be configured to support a combination of functions. For example, a specific WTRU 120 performing the scheduling request may also simultaneously provide measurement reporting or simultaneously provide a sync pulse to perform time advance. Accordingly, any combination of these functions may be performed in a common signaling procedure. Therefore, any number of functions may be performed simultaneously on a configured NCB channel. In another embodiment, a periodic NCB channel may be configured after a predefined period of time during which no UL transmissions have occurred.
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In addition, service types such as Voice over the Internet (VoIP) - (Voice over IP) or Internet games, Quality of Service (QoS) requirements - (Quality of Service) for the services currently active in the WTRU may be used. 120, as well as the activity rate of these services.
[0025] The NCB channel configuration may also include frequency domain multiplexing, such as by frequency division multiplexing (FDM). The NCB channel may also be multiplexed in the code domain using spreading codes, in the time domain and in the space domain using spatial division multiplexing (SDMA) - (Spatial Division Multiplexing) or other MIMO techniques. In addition, the NCB channel may be multiplexed by any combination of the above multiplexing techniques.
[0026] In this way, the physical resources used by the NCB channel may be configured to be used by more than one WTRU 120 at different times, without the WTRU 120 needing to be maintained during any particular period of time. For example, the NCB channel may be allocated to the WTRU1 for a specific periodicity and / or duration, and allocated to the WTRU2 for a different periodicity and / or duration. Accordingly, the NCB channel is typically dedicated to a specific WTRU 120 at a specific point in time but shared among a plurality of WTRU 120 at different time periods.
Still referring to Figure 3, an NCB grant is sent to the WTRUs 120 in the wireless communication system 100 by the eNB 110 (step 320) with which the WTRU 120 are in communication. In the example shown in Figure 1, the eNBi node transmits the NCB channel grant to the WTRU1, WTRU2 and WTRU3 while the eNB2 node transmits the NCB channel grant to the WTRU4.
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This transmission or communication may be included in common downlink (DL) control channel signaling or a dedicated control channel signal mapped to the shared DL channel among the WTRU 120.
[0028] Alternatively, the NCB may be allocated via the common control channel DL as other uplink shared channel (UL) assignments. In addition, in the case where the NCB channel is a control channel separate from the UL shared channel used for user data transmission, a logical control channel mapped to the DL shared channel may be used.
[0029] Figure 4 depicts an exemplary time frequency diagram 400 illustrating the allocation of NCB channels (designated 430, 440, and 450) to a plurality of WTRU 120, according to an embodiment of the present invention. In particular, NCB channel 430 may be dedicated to the WTRU1, NCB channel 440 may be dedicated to the WTRU2, and NCB channel 450 may be dedicated to the WTRU3. Correspondingly, in the present example, a WTRU1 accesses a node eNB1 on NCB 430, a WTRU2 accesses an eNB1 node on NCB 440, and a WTRU3 accesses an eNB1 node on NCB 450, through which the WTRUs 120 do not need to compete with each other for access to the eNB 110.
[0030] As shown in Figure 3, NCB channel allocation is analyzed by the wireless communication system 100 (step 330) to ensure optimal allocation. For example, the wireless communication system 100 may analyze the amount of time a currently allocated NCB channel has been idle, or the QoS requirements for various WTRUs 120 in the system 100. Alternatively, system 100 may determine that the NCB channel should be reconfigured upon receipt of the channel assignment signaling, resulting in the need for an increase or decrease in data capacity.
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If system 100 determines that reconfiguration or reallocation is required based on the analyzes (step 340), then system 100 may reconfigure the NCB channel allocation and transmit the updated NCB channel interval to the WTRUs 120 in the system (step 350).
[0031] Figure 5 is a flowchart of a method 500 of time advance determination using an NCB channel in accordance with the present invention. In step 510, the WTRU 120 transmits a sync burst to the eNB 110 via the NCB channel allocated to the WTRU 120. This sync burst may be transmitted periodically or dynamically based on defined trigger events. Since the time advance is relative to the signal propagation delay and the maximum WTRU speed is known, the periodicity requirement of the advance bursts can be calculated and matched to the configured NCB periodicity. Preferably, the sync pulses are coordinated to the time slots that exist on the NCB channel for that particular WTRU 120.
The eNB 110 receives a sync pulse from the WTRU 120 and performs a timing estimation to determine whether or not a Timing Advance (TA) adjustment is necessary to maintain physical synchronization between the WTRU 120 and the node. type eNB 110 (step 520). If TA adjustments are required (step 520), then the eNB sends the TA command to the specific WTRU 120 (step 530). This TA command may be sent on a common control channel DL or on a control channel mapped to a shared DL channel assigned to a particular WTRU 120.
[0033] Since the periodic NCB channel may be configured after a predefined period during which no UL transmissions have occurred, the NCB channel may be dynamically allocated or established during the inactivity periods.
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- 14 UL to maintain synchronization. By keeping synchronization during periods of inactivity with the NCB channel, transmission can be resumed with a reduced delay, which allows for better compliance with QoS requirements.
[0034] Figure 6 is a flowchart of a method 600 for determining a modification of DL scheduling over an NCB channel, in accordance with another embodiment of the present invention. The WTRU 120 transmits a burst to the eNB 110 via the NCB channel reporting DL channel quality measurements (step 610). When the eNB 110 receives the channel quality measurements, the eNB 110 analyzes them to determine whether or not modifications or adjustments are necessary for the DL scheduling (step 620). DL channel quality measurements may be reported periodically or dynamically based on trigger events. Preferably, the channel quality reporting coincides with the configured NCB channel allocation. Using an NCB channel to report WTRU measurements provides a more efficient use of physical resources and provides UL information signaling with reduced latency compared to using a RACH channel or dynamically requesting a shared UL channel for this purpose. If it is necessary to modify the DL scheduling (step 630), then the eNB 110 sends the new DL channel scheduling assignments to the WTRU 120 (step 640).
In the embodiment shown in Figure 6, the NCB channel may be periodically configured or event triggered to report UL measurements. Accordingly, as described above, the use of the NCB channel may coincide with other concurrent functions or applications of the NCB channel such as advance timers, scheduling requests, measurement reporting and the like.
Figure 7 is a flowchart of a UL resource request method 700 using an NCB channel, in accordance with another embodiment of the present invention. At step 710, one
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- 15 or more WTRUs 120 transmit a scheduling request to access the UL channel on their dedicated NCB channel that has been configured and allocated to them. In the present embodiment, the NCB channel may be periodically configured or even triggered to service scheduling requests. In addition, the occurrence of scheduling requests can coincide with other NCB channel applications such as time advance, reporting channel measurements, and the like.
Referring again to Figure 4, the transmitted request at step 710 of Figure 7 may be an impulse transmitted by one of the WTRUs 120 on its respective NCB channel (430, 440, or 450) requesting an allocation of the physical resources of the UL, whereby it is indicated. the presence of the resource allocation request impulse itself for that particular WTRU 120. Alternatively, the burst may be an indication which, for example, may contain only one bit of information, such as zero (0) or one (1) that indicates whether an allocation of resources is necessary or not. The burst may also include information related to the resource allocation request, such as the amount of UL data that a particular WTRU 120 will need to transmit, data priority, QoS, delay requirement, BLER requirement, and the like.
[0038] The NCB channel may be configured to operate periodically with or without a predetermined duration. Preferably, the request for allocation of the UL channel coincides with the recurring operation of the NCB channel. If an urgent UL resource request is required and the NCB channel is not available, the RACH channel may be used. The UL resource request method may coincide with a time advance method 500 or a measurement reporting method 600. In these cases, the NCB channel provides multiple targets within UL co-transmission.
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Based on the UL resource request, a proper resource allocation is determined and the eNB 110 sends the UL shared channel grant access to one or more WTRU 120 on the DL common control channel (step 720) as shown in Figure 7 .
For purposes of example, Figure 8 shows an exemplary time-frequency diagram 800 showing the allocation of physical resources according to step 720 of method 700 of Figure 7. Figure 8 shows a time-frequency diagram 800 that includes the allocated resource portion 830 and the allocated resource portion 840. resource blocks. In the present example, the allocated resource portion 830 shows the resource allocation for a WTRU1 (831), the resource allocation for the WTRU2 (832), and the resource allocation for the WTRU3 (833). In this way, an allocation of resources may be determined implicitly by the WTRUs 120 based on the resources used to grant access in the DL transmission.
[0041] Alternatively, resource allocations 831, 832 and 833 may correspond to allocated resource blocks in the allocated portion 840 of resource blocks. For example, referring again to Figure 8, resource allocation 831 corresponds to a single resource block 844 allocated to the WTRU1. However, the resource allocation 832 corresponds to three (3) resource blocks 845 that are allocated to the WTRU2, while the resource allocation 833 corresponds to two (2) resource blocks 846 that are allocated to the WTRU3. It should be noted that the allocation of resource blocks shown in Figure 8 is exemplary and that any specific resource allocation may correspond to a single resource block or to multiple resource blocks. An identifier (ID) - (Identifier) for a particular WTRU 120 to which the resource block is allocated may be included to identify to the WTRU 120 which resource block belongs to it. Alternatively, the DL control channel may be common to multiple WTRUs 120.
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[0042] In any event, a resource allocation is identified for a WTRU 120 as any period that a resource is allocated to that WTRU 120, as well as where the allocation exists. For example, which resource blocks allocated to a particular WTRU 120 are identified to the WTRU 120.
[0043] After the specific WTRUs 120 have received their shared channel access grants on the DL, the WTRUs 120 communicate via their allocated channels or resource blocks (step 730).
[0044] In yet another embodiment, the NCB channel may be used to keep the heartbeat active. For example, the WTRU 120 transmits a periodic keep-alive signal over an NCB channel, which is used by the system to detect a radio link failure between the WTRU 120 and the eNB 110. In this way, the system can take whatever action is necessary to restore lost connectivity with that particular WTRU 120 as well as to recover any resources that are allocated to the WTRU 120. Additionally, as with various other NCB channel functions and applications the signaling for keeping the heartbeat active may be combined with other NCB channel functions for which the UL channel requirement complies. For the keep-alive signal, a similar NCB channel may be allocated in the DL such that the WTRU may take appropriate action required after a link failure.
[0045] In another embodiment, the NCB channel may be used for HARQ feedback. For example, in response to HARQ transmissions, the NCB channel may be used to transmit a positive (successful) or negative (failed) acknowledgment (ACK) - (Acknowledgment). Additionally, the process number or any other HARQ parameters used to coordinate HARQ transmission may be
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- 18 sent over the NCB channel depending on the HARQ method. The NCB channel may be particularly useful for HARQ synchronous operation where periodic feedback may be adapted to the recurring NCB channel configuration.
[0046] In another alternative embodiment, the NCB channel may be used for MAC signaling, RRC signaling, and / or small amounts of user data. In addition, MAC and / or RRC layer co-ordination may be achieved via the NCB channel. In such cases, procedures with a known frequency may be mapped to the NCB channel to optimize the use of physical resources. WTRUs 120 may also transmit small amounts of data on their allocated NCB channel. In this way, the NCB channel may be used by WTRUs 120 to transmit small amounts of user data when a shared channel or other alternative channel is not available / allocated. Allowing access to user data on the NCB channel reduces transmission latency and improves QoS.
[0047] To provide flexibility for frequency selective fading, NCB UL channels may contain several sub-channels in an XFDMA system such as Orthogonal Frequency Division Multiple Access (OFDMA) or a single carrier FDMA system ( SC) - (Single Carrier) (SC-FDMA). In one subframe of the XFDMA system there are short blocks (SB) - (Short Block) and long blocks (LB) - (Long Block). Typically, a short SB block is used to transmit reference signals and a long LB is typically used to transmit data packets. The reference signals provide a complete view of the channel layout in one OFDM subframe for a particular WTRU 120, and may also be used in channel measurements to determine the intensity of frequency selective fading. Therefore, it can be used for
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- 19 determining how differentiated the frequency of the NCB channel assignment will be.
Figure 9 depicts an exemplary block diagram 900 showing a frequency differentiated NCB channel assignment in a multi-sub-channel system, in accordance with the present invention. For example, as shown in Figure 9, NCB channel allocations for WTRU1 and WTRU2 distributed over multiple subchannels that may exist in a single resource block or portion of a resource block are shown. Then, the NCB channel is allocated in a distributed manner based on the UL channel measurements.
[0049] Further efficiency may be achieved using the NCB channel, where the resource is changed for a specific WTRU 120. For example, the NCB resource allocation may be changed according to a preconfigured time pattern and / or frequency hopping pattern. An NCB channel with very few channel resources may not have good frequency diversity even though the NCB channel is spread as wide as possible in the frequency domain. Therefore, the use of time and / or frequency hopping can further improve diversity and ensure that the NCB channel is correctly received at the receiver side.
[0050] Figure 10 depicts an exemplary time frequency diagram 1000 illustrating an NCB channel assignment with time and frequency hopping, according to an embodiment of the present invention. In the different subframes where a resource is allocated to a particular WTRU 120, the resource frequency allocation for the NCB channel will vary from subframe to subframe. This frequency assignment change is based on a time and / or frequency hopping pattern that is preconfigured during the NCB channel assignment phase. This is another alternative embodiment for physically implementing an NCB channel. The frequency / time hopping pattern is an important message in
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Signaling the NCB channel assignment for a particular WTRU 120, such that it can transmit on the NCB channel in accordance with this hopping pattern. Similarly, the eNB 110 may receive the signaling following the same pattern in a coordinated manner.
[0051] The NCB may further be configured by an eNB 110 sending control messages to the WTRU 120. For example, the eNB 110 may transmit a resource message relating to subcarriers, space (antenna beams), slots or codes. In addition, the eNB 110 can send a hop sequence, such as an index of the assigned hop sequence set, to the WTRU 120 to which the NCB channel is allocated.
[0052] In an additional embodiment, the NCB channel may be allocated along with both Real Time (RT) and Non Real Time (NRT) services to assist with dynamic, semi-dynamic, persistent, or semi-persistent scheduling. services.
[0053] For NRT services, an NCB channel may be allocated to support dynamic scheduling. For example, the NCB channel may be used for time advance, periodic measurement reporting, UL physical resource request, UL traffic state reporting, information provision for DL resource scheduling, HARQ feedback, and / or MAC / RRC layer signaling, and the like. An NCB channel supporting dynamic or semi-dynamic scheduling may be configured at the start of dynamic or semi-dynamic NRT scheduling for one WTRU or in the scheduling center. Also, the NCB channel may be terminated, modified, or extended as situations such as mobility of the WTRU or channel conditions change.
[0054] The NCB channel for some specific applications may have a consistent periodicity from the start of the NCB channel scheduling grant. Alternatively, NCB channel for other specials
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- 21 applications can start their periodicity at a certain time after each pulse transmission.
[0055] For example, in the first case, time advance and reporting of measurements may require continuous reporting to support accurate scheduling decisions. However, the ACK / NAK HARQ feedback does not necessarily need to maintain its periodicity from the beginning of scheduling, and the NCB channel may therefore start a certain time after one pulse transmission several times, unless successful reception is declared.
[0056] The duration of an NCB channel may be completed before its allocated life cycle expires, or may be extended based on system demand. Termination of an existing NCB channel may be signaled by pointing from an eNB 110 via RRC message, MAC signaling (such as MAC header), or Layer 1 or Layer 2 (L1 / L2) signaling. In one example, the indication may simply be an OFF (0) signal.
Completion of the NCB channel allocation may be signaled either explicitly or implicitly. For example, at the end of a silent period, the WTRU 120 sends an indication of the change in voice activity to the eNB 110 via the NCB channel. The eNB 110 then allocates the new UL persistent radio resources for voice activity over the DL scheduling channel. Upon receipt of a UL resource allocation on the DL scheduling channel, the WTRU 120 may implicitly detect the termination of existing NCB channel allocations. Alternatively, one clear indication may be sent from the eNB 110 to the WTRU 120 to signal termination.
[0058] The NCB channel extension may be substantially the same as the previous grant, or for a different duration, or longer or shorter. The extension may also contain
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- configuration of new time and frequency allocation patterns such as frequency hopping.
[0059] The periodicity of the NCB channel may be determined based on the NCB channel application. For example, in the WTRU high mobility scenario, a high periodicity NCB channel should be allocated to support UL synchronization maintenance. How often measurement reports should be sent to the eNB 110 is also determined based on the NCB channel application.
[0060] Figure 11 is an exemplary diagram showing various NCB channel requirements for a WTRU, according to an embodiment of the present invention. Referring to Figure 11, more than one NCB channel may be simultaneously allocated to a specific WTRU 120 for various scheduling purposes. These different NCB channels may have different configurations. For example, but not limited to, NCB channel periodicity and channel bandwidth may be configured to meet various requirements.
During the silence period, there may be NCB channels used to maintain UL synchronization, send voice activity reports, send measurement reports, send UL scheduling requests, and send Silence Indication Detections (SID), and the like of a node eNB type 110. However, the periodicity for SID packets in the UL is every 160 milliseconds (ms) which may be different from the periodicity required for other functions. For example, the periodicity of the UL time look-ahead function may be either shorter or longer than the periodicity for sending SID detection. Also, the radio resources used for SID packets and other UL utility purposes are different, again requiring different NCB channel configurations. Accordingly, different NCB channel configurations and assignments may be required for different system requirements. On the other hand, apps like the
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- 23 resource requirements and periodicity can be grouped into one NCB channel configuration and assignment.
[0062] In addition, there may be different application requirements for one WTRU where an NCB channel is allocated with one periodicity. In this case, the NCB channel may be configured with different radio resource allocations for different slots within one NCB channel allocation. For example, the SID packet interval may coincide with other UL functions such as the UL scheduling request, keeping synchronization and reporting measurements, and the like, such as every 160 ms. However, if more radio resources are needed in 160 ms intervals to meet additional SID packet needs, eNB 110 may allocate more radio resources in 160 ms intervals, and fewer resources in other than 160 ms intervals. In this way, the eNB 110 need not always allocate the maximum radio resources for all NCB channel bins to cover all different scenarios, thus making the resource usage much more efficient.
[0063] In addition, the NCB channel should be maintained during handoff from one base station to the other. To this end, the originating base station exchanges signaling with the destination base station to allocate an NCB channel for the WTRU 120 in the destination cell to which the WTRU is handed over. This may be achieved by transmission over a common control channel in the source cell or a shared channel allocated to a particular WTRU 120 to communicate the target cell NCB channel information to a specific WTRU 120. This information may include NCB channel resources in the target cell, hopping patterns in target cell, or a time advance, such as the time difference between source and target cells. The time difference between the cells in this case may be computed by the system and sent to the WTRU 120,
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- 24 to be communicated by the source or destination base station.
[0064] The present invention may be implemented with any type of wireless communication system as desired. By way of example, the present invention may be practiced with any type of 802, XFDMA, SC-FDMA, OFDMA, E-UTRA, LTE or any other type of wireless communication system.
[0065] Additionally, features of the present invention may be implemented by software, may be embedded in an integrated circuit (IC), or may be configured in a circuit having a plurality of interconnected components. In addition, processors 115/125 of the eNB 110 and the WTRU 120, respectively, may be configured to perform the steps of any of the methods described above. Processors 115/125 may also use receivers 116/126, transmitters 117/127, and antennas 118/128, respectively, to facilitate wireless data reception and transmission.
[0066] Although the features and elements of the present invention are described in the preferred embodiments in specific combinations, each feature or element may be used alone without the other features and elements of the preferred embodiments, or in various combinations with or without other features and elements of the present invention. invention. The methods or flowcharts of the present invention may be implemented as a computer program, software, or firmware specifically executed on a computer readable medium for execution by a general purpose computer or processor. Examples of computer-readable media include: read only memory (ROM) - (Read Only Memory), random access memory (RAM) - (Random Access Memory), register, cache, semiconductor memory devices,
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- Magnetic media, such as internal hard disks and removable drives, magneto-optical media, and optical media, such as CD-ROMs and DVDs - (Digital Versatile Disk).
[0067] Suitable processors include, by way of example: general purpose processor, special purpose processor, traditional processor, digital signal processor (DSP) - (Digital Signal Processor), multiple microprocessors, one or more microprocessors associated with a DSP core, controller, microcontroller, specialized integrated circuits (ASIC) - ( Application Specific Integrated Circuit), Field Programmable Gate Array (FPGA) circuits, any IC and / or state machine.
The processor, in conjunction with the software, may be used to implement a radio transceiver for use in a Wireless Transmit / Receive Unit (WTRU), user equipment, terminal, base station, radio network controller, or any host computer. The WTRU can be used in conjunction with modules implemented on a hardware and / or software platform, such as a camera, video camera module, videophone, loudspeaker, vibration device, loudspeaker, microphone, TV transceiver, headset, keyboard. , Bluetooth module, radio unit with frequency modulation (FM) - (Freguency Modulated), liquid crystal display (LCD) - (Liguid Crystal Display), Organic Light-Emitting Diode (OLED) display, digital music player, media player, video game module, web browser and / or any wireless local area network (WLAN) module - (Wireless Local Area Network) .
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Execution examples
[0069]
1. A method of providing a Non-Contention Based (NCB) channel to multiple Wireless Transmit Receive Units (WTRUs) in a wireless communication system.
2. The method of embodiment 1, further comprising an evolved Node-B (eNB) - (evolved NodeB).
3. The method as in any of the preceding embodiments, further comprising establishing an NCB channel.
4. The method as in any preceding embodiment, further comprising allocating an NCB channel to the first WTRU.
5. The method as in any of the preceding embodiments, further comprising determining if an NCB channel reallocation is required.
6. The method as in any of the preceding embodiments, further comprising reallocating the NCB channel based on the determination of the reallocation.
7. The method as in any preceding embodiment, further comprising transmitting the NCB channel grant to the first WTRU.
8. The method as in any of the preceding embodiments, further comprising configuring an NCB channel.
9. A method as in any of the preceding embodiments, wherein the NCB channel duration is configured.
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10. A method as in any of the preceding embodiments, wherein the NCB channel duration is configured for infinite time.
11. A method as in any of the preceding embodiments, wherein the NCB channel duration is configured for a period of time.
12. A method as in any of the preceding embodiments, wherein the NCB channel is configured to exist at periodic intervals.
13. A method as in any preceding embodiment, wherein the NCB channel is allocated to the first WTRU in the first periodic interval and reallocated to the second WTRU for the second periodic interval.
14. A method as in any of the preceding embodiments, wherein the NCB channel configuration is based on at least one of the following functions: time advance, measurement reporting, physical resource request, decomposition request, heartbeat keep alive, Hybrid Automatic Repeat Request (HARQ) feedback and Medium Access Control (MAC) / control layer signaling Radio Resource Control (RRC) - (Radio Resource Control).
15. A method as in any of the preceding embodiments, wherein the NCB channel configuration is based on a combination of time advance functions, measurement reporting, physical resource request, schedule request, heartbeat keep-alive, HARQ feedback, and MAC / RRC layer signaling.
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16. A method as in any of the preceding embodiments, wherein the NCB channel configuration is based on at least one of: a Quality of Service (QoS) requirement for services currently active on a particular WTRU in a wireless communication system, a type of service, and an activity indicator. currently active services.
17. A method as in any of the preceding embodiments, wherein the NCB channel is configured as a low rate shared channel.
18. The method as in any of the preceding embodiments, further comprising a first WTRU communicating the data via the NCB channel.
19. A method as in any of the preceding embodiments, wherein the NCB channel is configured to provide signaling in a control field of the physical channel.
twenty. A method as in any of the preceding embodiments, wherein the NCB channel is configured to provide signaling at the Medium Access Control (MAC) layer.
21. A method as in any of the preceding embodiments, wherein the NCB channel is configured to provide signaling at the Radio Resource Control (RRC) layer.
22. The method as in any of the preceding embodiments, further comprising multiplexing the NCB channel.
23. A method as in any of the preceding embodiments, wherein the NCB channel is frequency domain multiplexed.
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24. A method as in any of the preceding embodiments, wherein the NCB channel is multiplexed using frequency division multiplexing (FDM).
25. A method as in any of the preceding embodiments, wherein the NCB channel is multiplexed in the code domain.
26. A method as in any of the preceding embodiments, wherein the NCB channel is multiplexed in the code domain using spreading codes.
27. A method as in any of the preceding embodiments, wherein the NCB channel is time-domain multiplexed.
28. A method as in any of the preceding embodiments, wherein the NCB channel is space-domain multiplexed.
29. A method as in any of the preceding embodiments, wherein the NCB channel is multiplexed using Spatial Division Multiplexing (SDMA).
thirty. The method as in any preceding embodiment, further comprising reallocating the NCB channel to the second WTRU.
31. The method as in any of the preceding embodiments, further comprising terminating the NCB channel allocation.
32. A method as in any of the preceding embodiments, wherein the first WTRU completes the NCB channel allocation.
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33. A method as in any of the preceding embodiments, wherein the eNB completes the NCB channel allocation.
34. The method as in any preceding embodiment, further comprising communicating the NCB channel grant to the first WTRU via common downlink control (DL) signaling.
35. The method as in any preceding embodiment, further comprising transmitting the NCB channel grant to the first WTRU via a dedicated control channel signal that is mapped to the shared DL channel.
36. A method as in any of the preceding embodiments, wherein the NCB channel is allocated over the DL common control channel as UL shared channel assignments.
37. The method as in any of the preceding embodiments, further comprising analyzing the NCB channel allocation.
38. The method as in any of the preceding embodiments, further comprising determining whether a reallocation is required due to a changing type of service requirement or QoS requirement.
39. The method as in any of the preceding embodiments, further comprising determining whether a reallocation is required due to an NCB channel remaining idle for a particular period of time.
40. A method as in any of the preceding embodiments, further comprising determining whether a reallocation is required due to the data capacity increase or decrease requirement.
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41. The method as in any preceding embodiment, further comprising communicating the reallocation determination to the WTRUs in the wireless communication system.
42. The method as in any preceding embodiment, further comprising a first WTRU transmitting a sync burst or an existing data packet to the eNB via the NCB channel.
43. The method as in any preceding embodiment, further comprising an eNB determining if a Timing Advance (TA) adjustment is necessary.
44. The method as in any preceding embodiment, further comprising an eNB transmitting the TA adjusting command to the first WTRU depending on the determination of whether TA is necessary.
45. A method as in any preceding embodiment, wherein the eNB determines that TA adjustment is necessary to maintain physical synchronization between the eNB and the first WTRU.
46. A method as in any of the preceding embodiments, wherein the TA command is sent to the first WTRU on the DL common control channel.
47. A method as in any of the preceding embodiments in which the TA command is sent on a control channel mapped to a shared DL channel assignment among the WTRUs.
48. A method as in any of the preceding embodiments, wherein the synchronization burst is transmitted after a predefined period during which no UL transmissions have occurred.
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49. The method as in any preceding embodiment, further comprising a first WTRU transmitting the channel quality measurements to the eNB via the NCB channel.
50. The method as in any preceding embodiment, further comprising an eNB analyzing the channel quality measurements.
51. A method as in any of the preceding embodiments, further comprising an eNB determining if scheduling modifications are required.
52. The method as in any preceding embodiment, further comprising the eNB transmitting the new DL scheduling assignments to the first WTRU based on determining if scheduling modifications are necessary.
53. A method as in any of the preceding embodiments, wherein the eNB transmits the new DL scheduling assignments over the DL control channel.
54. The method as in any of the preceding embodiments, further comprising a first WTRU requesting the resources via the NCB channel.
55. The method as in any preceding embodiment, further comprising a first WTRU monitoring the common control DL channels.
56. The method as in any preceding embodiment, further comprising determining an allocation of resources for the first WTRU by the wireless communication system.
57. The method as in any preceding embodiment, further comprising an eNB transmitting an UL shared access grant.
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33 to the first WTRU over common control channels DL.
58. The method as in any of the preceding embodiments, further comprising the first WTRU transmitting over the channel allocated to the first WTRU.
59. A method as in any of the preceding embodiments, wherein a UL shared channel grant is implied for the first WTRU based on the resource used for granting access in transmission over the DL common control channels.
60. A method as in any of the preceding embodiments, wherein the grant of an UL shared channel access grant is explicitly communicated to the first WTRU.
61. A method as in any of the preceding embodiments, wherein the at least one resource block is communicated to the first WTRU as allocated to the first WTRU.
62. A method as in any of the preceding embodiments, wherein granting access to a UL shared channel comprises an identifier (ID) for the first WTRU.
63. The method as in any of the preceding embodiments, further comprising a plurality of WTRUs transmitting a resource request over an NCB channel and monitoring the common control DL channels.
64. The method as in any preceding embodiment, further comprising determining an allocation of resources for the plurality of WTRUs.
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65. The method as in any preceding embodiment, further comprising an eNB transmitting an UL shared channel grant to the plurality of WTRUs over the common DL control channels.
66. The method as in any preceding embodiment, further comprising a plurality of WTRUs transmitting on their individual allocated channels.
67. The method as in any preceding embodiment, further comprising transmitting the keep alive signal to the eNB via the NCB channel.
68. The method as in any preceding embodiment, further comprising detecting a radio link failure between the specific WTRU and the eNB.
69. A method as in any preceding embodiment, further comprising restoring lost connectivity between the particular WTRU and the eNB.
70. A method as in any preceding embodiment, further comprising recovering the resources allocated to the particular WTRU.
71. The method as in any preceding embodiment, further comprising receiving Hybrid Automatic Repeat Request (HARQ) transmissions.
72. The method as in any of the preceding embodiments, further comprising transmitting an acknowledgment (ACK) - (Acknowledgment) over the NCB channel.
73. A method as in any of the preceding embodiments wherein ACK is positive ACK.
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74. A method as in any of the preceding embodiments, wherein the ACK is a negative ACK (NACK) (Negative ACK).
75. A method as in any of the preceding embodiments, wherein the HARQ transmission is transmitted over an NCB channel.
76. A method as in any of the preceding embodiments, further comprising transmitting the process number via an NCB channel.
77. The method as in any of the preceding embodiments, further comprising communicating HARQ parameters over an NCB channel.
78. The method as in any preceding embodiment, further comprising multiplexing RRC signaling messages over the NCB channel.
79. A method as in any of the preceding embodiments, further comprising communicating small amounts of data over an NCB channel.
80. The method as in any of the preceding embodiments, further comprising coordinating the operation of the MAC layer through the NCB channel.
81. The method as in any of the preceding embodiments, further comprising configuring an NCB channel for transmission over the first WTRU.
82. The method as in any preceding embodiment, further comprising allocating an NCB channel to the first WTRU.
83. The method as in any of the preceding embodiments, further comprising spreading the NCB channel over a plurality of sub-channels.
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84. A method as in any of the preceding embodiments, wherein multiple sub-channels exist in a single resource block.
85. A method as in any of the preceding embodiments, wherein multiple sub-channels exist in a portion of the resource block.
86. The method as in any preceding embodiment, further comprising changing the NCB channel allocation for the first WTRU.
87. A method as in any of the preceding embodiments, wherein the allocation is changed according to a preconfigured time sequence.
88. A method as in any of the preceding embodiments, wherein the allocation is changed according to a preconfigured frequency hopping sequence.
89. The method as in any preceding embodiment, further comprising an eNB transmitting control messages to the first WTRU.
90. A method as in any of the preceding embodiments, wherein the control messages include information including any of the following: a resource message related to a subcarrier, slot information, codes, and a hopping sequence.
91. A method as in any of the preceding embodiments, wherein the hop sequence comprises an index of the assigned set of the hop sequences to which the NCB channel is allocated for the first WTRU.
92. A method as in any of the preceding embodiments, wherein the wireless communication system comprises a source base station in the source cell and a destination base station in a target cell.
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93. The method as in any of the preceding embodiments, further comprising a Source Base Station signaling the target base station to allocate an NCB channel for the WTRU to be communicated.
94. The method as in any of the preceding embodiments, further comprising a destination base station allocating an NCB channel for the WTRU to be communicated.
95. The method as in any preceding embodiment, further comprising signaling to the WTRU of the NCB channel grant allocated by the target base station.
96. A method as in any of the preceding embodiments, wherein the NCB channel assignment is signaled to the WTRU to be communicated over the common control channel.
97. A method as in any of the preceding embodiments, wherein the NCB channel assignment is signaled to the WTRU to be communicated over the shared channel allocated to the WTRU.
98. A method as in any of the preceding embodiments, wherein the NCB channel grant signaled to the WTRU to be communicated includes information related to NCB channel resources in the target cell.
99. A method as in any of the preceding embodiments, wherein the NCB channel grant signaled to the WTRU to be communicated comprises information related to a hop sequence in the target cell.
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100. A method as in any of the preceding embodiments, wherein the NCB channel grant signaled to the WTRU to be communicated includes information related to time advance.
101. A method as in any of the preceding embodiments, wherein the time advance information comprises the time difference between the source cell and the target cell.
102. A method as in any of the preceding embodiments, wherein the originating base station signals the NCB channel assignment to the WTRU.
103. A method as in any of the preceding embodiments, wherein the destination base station signals the NCB channel assignment to the WTRU.
104. The method as in any of the preceding embodiments, further comprising configuring an NCB channel for a function including any of the following: time advance, measurement reporting, UL physical resource request, information provision for downlink resource scheduling (DL), heartbeat keep alive, HARQ feedback, and Medium Access Control (MAC) or Radio Resource Control (RRC) layer signaling ) - (Radio Resource Control).
105. The method as in any preceding embodiment, further comprising allocating an NCB channel to the first WTRU.
106. The method as in any of the preceding embodiments, further comprising determining if an NCB channel reallocation is required.
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107. The method as in any of the preceding embodiments, further comprising reallocating the NCB channel based on the determination of the reallocation.
108. A method as in any of the preceding embodiments, wherein the NCB channel is configured for any combination of the following functions: time advance, measurement reporting, UL physical resource request, information provision for DL resource scheduling, heartbeat keep-alive, HARQ feedback, and MAC layer signaling. / RRC.
109. A method as in any of the preceding embodiments, wherein the NCB channel is allocated periodically.
110. A method as in any of the preceding embodiments, wherein the NCB channel is allocated for a duration.
111. The method as in any of the preceding embodiments, further comprising reconfiguring the NCB channel after detecting a period of WTRU Inactivity.
112. The method as in any of the preceding embodiments, further comprising reconfiguring the NCB channel based on the detected event.
113. An eNB configured to perform the method as in any of the preceding embodiments.
114. An eNB according to embodiment 113, further comprising a receiver.
115. An eNB as in any of embodiments 113-114, further comprising a transmitter.
116. An eNB as in any of embodiments 113-115, further comprising a processor in communication with the receiver and transmitter.
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117. Node of the eNB type as in any of embodiments 113-116, wherein the processor is configured to establish and allocate an NCB channel.
118. Node of the eNB type as in any of embodiments 113-117, wherein the processor is configured to transmit the NCB channel assignment to a specific WTRU.
119. Node of the eNB type as in any of embodiments 113-118, wherein the processor is configured to determine whether the NCB channel is to be reallocated.
120. Node of the eNB type as in any of embodiments 113-119, wherein the processor is configured to reallocate the NCB channel based on the reallocation determination.
121. Node of the eNB type as in any of the embodiments 113-120, wherein the processor is configured to configure an NCB channel based on any of the following functions: time advance, measurement reporting, UL physical resource request, information provision for DL resource scheduling, keep alive. heartbeat, HARQ feedback, and MAC / RRC layer signaling.
122. Node of the eNB type as in any of the embodiments 113-121, wherein the processor is further configured to configure an NCB channel based on a combination of time advance functions, measurement reporting, UL physical resource request, information provision for DL resource scheduling, keeping heartbeat active, HARQ feedback and MAC / RRC layer signaling.
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123. An eNB as in any of embodiments 113-122 in which the processor is configured to analyze QoS requirements.
124. A WTRU configured to perform the method of any of the embodiments 1-112.
125. The WTRU according to embodiment 124, further comprising a receiver.
126. The WTRU as in any of embodiments 124-125, further comprising a processor in communication with the receiver and transmitter.
127. The WTRU as in any of embodiments 124-126, wherein the processor is configured to receive the NCB channel grant for transmission.
128. A WTRU as in any of embodiments 124-127 in which the processor is configured to transmit on the NCB channel.
129. The WTRU as in any of embodiments 124-128, wherein the processor is configured to receive an NCB reallocation.
130. The WTRU as in any of embodiments 124-129, wherein the processor is configured to transmit a sync pulse over the NCB channel.
131. The WTRU as in any of the embodiments 124-130, wherein the processor is configured to perform the timing.
132. The WTRU as in any of the embodiments 124-131, wherein the processor is configured to transmit channel measurements via an NCB channel to the eNB.
133. The WTRU as in any of the embodiments 124-132 in which the processor is configured to
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134. The WTRU as in any of the embodiments 124-133, wherein the processor is configured to transmit the resource request via the NCB channel to the eNB.
135. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), a method for providing a non-contention based (NCB) channel ) - (Non-Contention Based) to multiple WTRUs, the method comprising:
(a) establishing an NCB channel;
(b) allocating an NCB channel to the first WTRU;
(c) determining if an NCB channel reallocation is required; and (d) reallocating the NCB channel based on the reallocation determination.
136. The method of embodiment 135, further comprising:
(e) transmitting the NCB channel assignment to the first WTRU.
137. The method of embodiment 135, wherein step (a) further comprises configuring an NCB channel.
138. The method of embodiment 137, wherein the NCB channel duration is configured.
139. The method of embodiment 138, wherein the NCB channel duration is configured for an infinite time.
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140. The method of embodiment 138, wherein the duration of the NCB channel is configured for a period of time.
141. The method of embodiment 138, wherein the NCB channel is configured to exist at periodic intervals.
142. The method of embodiment 141, wherein the NCB channel is allocated to the first WTRU in the first periodic interval and reallocated to the second WTRU for the second periodic interval.
143. The method of embodiment 136, wherein the NCB channel configuration is based on at least one of the following functions: time advance, measurement reporting, physical resource request, decomposition request, heartbeat keep alive, Hybrid Automatic Repeat Request (HARQ) feedback and Medium Access Control (MAC) / Control layer signaling Radio Resource Control (RRC) - (Radio Resource Control).
144. The method of embodiment 143, wherein the NCB channel configuration is based on a combination of time look-ahead, measurement reporting, physical resource request, schedule request, heartbeat keep-alive, HARQ feedback, and MAC / RRC layer signaling.
145. The method of embodiment 137, wherein the NCB channel configuration is based on at least one of: Quality of Service (QoS) requirement for services currently active on a particular WTRU in the wireless communication system, the type of service, and the activity indicator currently active. active services.
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146. The method of embodiment 137 wherein the NCB channel is configured as a low rate shared channel.
147. The method of embodiment 146, further comprising:
(e) a first WTRU transmitting data via the NCB channel.
148. The method of embodiment 137, wherein the NCB channel is configured to provide signaling in a control field of the physical channel.
149. The method of embodiment 137, wherein the NCB channel is configured to provide signaling at the Medium Access Control (MAC) layer.
150. The method of embodiment 137, wherein the NCB channel is configured to provide signaling at the Radio Resource Control (RRC) layer.
151. The method of embodiment 135, further comprising:
(e) NCB channel multiplexing.
152. The method of embodiment 151, wherein the NCB channel is frequency domain multiplexed.
153. The method of embodiment 152, wherein the NCB channel is multiplexed using frequency division multiplexing (FDM) - (Frequency Division Multiplexing).
154. The method of embodiment 151, wherein the NCB channel is code domain multiplexed.
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155. The method of embodiment 154, wherein the NCB channel is multiplexed in the code domain using spreading codes.
156. The method of embodiment 151, wherein the NCB channel is time multiplexed.
157. The method of embodiment 151, wherein the NCB channel is space multiplexed.
158. The method of embodiment 157, wherein the NCB channel is multiplexed using spatial division multiplexing (SDMA) - (Spatial Division Multiplexing).
159. The method of embodiment 135, wherein step (d) further comprises reallocating the NCB channel to the second WTRU.
160. The method of embodiment 135, further comprising:
(e) completion of NCB channel allocation.
161. The method of embodiment 160, wherein the first WTRU completes NCB channel allocation.
162. The method of embodiment 160, wherein the eNB completes NCB channel allocation.
163. The method of embodiment 135, further comprising:
(e) transmitting the NCB channel assignment to the first WTRU via common downlink control (DL) signaling.
164. The method of embodiment 135, further comprising:
(e) transmitting the NCB channel assignment to the first WTRU via the dedicated signal
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A control channel that is mapped to the shared DL channel.
165. The method of embodiment 135, wherein the NCB channel is allocated via the DL common control channel as UL shared channel assignments.
166. The method of embodiment 135, further comprising:
(e) analyzing NCB channel allocation.
167. The method of embodiment 135, wherein step (c) further comprises determining whether a reallocation is required due to a changing type of service requirement or QoS requirement.
168. The method of embodiment 135, wherein step (c) further comprises determining whether a reallocation is required due to an NCB channel remaining idle for a particular period of time.
169. The method of embodiment 135, wherein step (c) further comprises determining whether a reallocation is required due to a data capacity increase or decrease requirement.
170. The method of embodiment 135, further comprising:
(e) transmitting the reallocation determination to the WTRUs in the wireless communication system.
171. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of wireless transmit-receive units (WTRUs) - (Wireless Transmit Receive Unit), the channel time forward method based on non contention is (NCB) - (Non-Contention Based), and the method includes:
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(A) a first WTRU in the wireless communication system transmitting a sync burst or an existing data packet to the eNB via the NCB channel.
(b) an eNB that determines if a Timing Advance (TA) control is necessary; and (c) the eNB transmitting the TA adjusting command to the first WTRU depending on the determination of whether a TA is necessary.
172. The method of embodiment 171, wherein the eNB determines that TA adjustment is necessary to maintain physical synchronization between the eNB and the first WTRU.
173. The method of embodiment 171, wherein the TA command is sent to the first WTRU on a common downlink (DL) control channel.
174. The method of embodiment 171, wherein the TA command is sent on a control channel mapped to a shared DL channel assignment among the WTRUs.
175. The method of embodiment 171, wherein the sync pulse is transmitted after a predefined period during which no UL transmissions have occurred.
176. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Units (WTRUs), the method determines scheduling for WTRUs on a channel based on non-competition (NCB) - (Non-Contention Based), the method includes:
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(A) a first WTRU transmitting the channel quality measurements to the eNB via the NCB channel;
(b) an eNB analyzing the channel quality measurements;
(c) an eNB that determines if scheduling modifications are required; and (d) the eNB transmitting the new downlink scheduling assignments (DL) to the first WTRU based on the determination of whether scheduling modifications are necessary.
177. The method of embodiment 176, wherein the eNB transmits the new DL assignments over the DL control channel.
178. In a wireless communication system including at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), the method of requesting and allocating resources for WTRUs in channel based on non-competition (NCB) - (NonContention Based), the method includes:
(a) the first WTRU sending a resource request via the NCB channel;
(b) a first WTRU monitoring the common downlink control (DL) channels;
(c) determining an allocation of resources for the first WTRU by the wireless communication system;
(d) the eNB sending the shared uplink channel (UL) access grant to the first WTRU over the common control channels DL; and (e) the first WTRU transmitting over the channel allocated to the first WTRU.
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179. The method of embodiment 178, wherein granting access to a UL shared channel is implied for the first WTRU based on the resource used for granting access in transmission over the common control DL channels.
180. The method of embodiment 178, wherein the granting of a UL shared channel access allocation is explicitly communicated to the first WTRU.
181. The method of embodiment 179, wherein the at least one resource block is communicated to the first WTRU as allocated to the first WTRU.
182. The method of embodiment 181, wherein granting the UL shared channel access allocation comprises an identifier (ID) - (Identifier) for the first WTRU.
183. The method of embodiment 178, further comprising:
(f) a plurality of WTRUs requesting resources over the NCB channel and monitoring the common control DL channels.
184. The method of embodiment 183, further comprising:
(g) determining an allocation of resources for the plurality of WTRUs;
(h) an eNB sending the UL shared channel access grant to the plurality of WTRUs over the DL common control channels; and (i) a plurality of WTRUs transmitting on their respective assigned channels.
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185. In a wireless communication system including at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), the method of performing keep alive for WTRUs on a channel based on non-competition (NCB) - (Non-Contention Based), and the method includes:
(a) transmitting a keep active signal to an eNB via a NCB channel;
(b) detecting a radio link failure between the specific WTRU and the eNB; and (c) restoring lost connectivity between the particular WTRU and the eNB.
186. The method of embodiment 185, further comprising:
(d) recovering the resources allocated to the specific WTRU.
187. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), the Hybrid Automatic Repeat Request (HARQ) feedback method is ) - (Hybrid Automatic Repeat Reguest) in NCB - (Non-Contention Based) channel, the method includes:
(a) receiving HARQ transmissions; and (b) transmitting the acknowledgment (ACK) - (Acknowledgment) over the NCB channel.
<td> 188.</td><td>The method of embodiment 187,</td><td>in which ACK</td>
<td>is</td><td>positive ACK.</td><td></td>
<td> 189.</td><td>The method of embodiment 187,</td><td>in which ACK</td>
<td>is</td><td>negative ACK (NACK) - (Negative ACK).</td><td></td>
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190. The method of embodiment 187 wherein the HARQ transmission is transmitted over an NCB channel.
191. The method of embodiment 187, further comprising:
(c) transmission of the process number via the NCB channel.
192. The method of embodiment 187, further comprising:
(c) transmission of HARQ parameters via the NCB channel.
193. In a wireless communication system including at least one evolved Node-B (eNB) and a plurality of wireless transceiver units (WTRUs) - (Wireless Transmit Receive Unit), a medium access control (MAC) method ( Medium Access Control) and Radio Resource Control (RRC) - (Radio Resource Control) on a non-contention based (NCB) - (Non-Contention Based) channel, the method comprising:
(a) multiplexing RRC signaling messages over the NCB channel;
(b) transmitting small amounts of data over the NCB channel; and (c) coordinating the operation of the MAC layer through the NCB channel.
194. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), the method of providing frequency selective fade flexibility , the method includes:
(a) configuring a Non-Contention Based (NCB) - (Non-Contention Based) channel for transmission by the first WTRU;
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(B) allocating an NCB channel to the first WTRU; and (c) spreading the NCB channel across multiple sub-channels.
195. The method of embodiment 194, wherein multiple sub-channels exist in a single resource block.
196. The method of embodiment 194, wherein a plurality of sub-channels exist in a portion of the resource block.
197. The method of embodiment 194, further comprising:
(d) changing the NCB channel assignment for the first WTRU.
198. The method of embodiment 197, wherein the allocation is changed according to a preconfigured time sequence.
199. The method of embodiment 197 wherein the allocation is changed according to a preconfigured frequency hopping sequence.
200. The method of embodiment 194, further comprising:
(d) the eNB transmitting control messages to the first WTRU.
201. The method of embodiment 200, wherein the control messages include information selected from the group consisting of: a resource message related to a subcarrier, slot information, codes, and hopping sequences.
202. The method of embodiment 201, wherein the hop sequence comprises an index of the assigned set of the hop sequence to which the NCB channel is allocated for the first WTRU.
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203. In a wireless communication system including a source base station in a source cell, a target base station in a target cell, and at least one Wireless Transmit Receive Unit (WTRU), a non-contention channel (NCB) maintenance method - (NonContention) Based) during a connection handover, the method comprising:
(a) a Source Signal Base Station signaling of a target base station to allocate an NCB channel for the WTRU to be communicated;
(b) a destination base station allocating the NCB channel for the WTRU to be communicated; and (c) signaling to the WTRU of the NCB channel grant allocated by the target base station.
204. The method of embodiment 203, wherein the NCB grant is signaled to a WTRU to be communicated over the common control channel.
205. The method of embodiment 203, wherein the NCB grant is signaled to a WTRU to be communicated over a shared channel allocated to the WTRU.
206. The method of embodiment 203, wherein the NCB channel assignment signaled to the WTRU to be communicated includes information related to NCB channel resources in the target cell.
207. The method of embodiment 203, wherein the NCB channel assignment signaled to the WTRU to be communicated includes information related to the hop sequence in the target cell.
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208. The method of embodiment 203, wherein the NCB channel assignment signaled to the WTRU to be communicated includes information related to time advance.
209. The method of embodiment 208, wherein the time advance information comprises a time difference between the source cell and the destination cell.
210. The method of embodiment 203, wherein the originating base station signals the assignment of the NCB channel to the WTRU.
211. The method of embodiment 203, wherein the destination base station signals the assignment of the NCB channel to the WTRU.
212. In a wireless communication system including at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), the eNB comprises:
receiver;
transmitter; and a processor in communication with the receiver and transmitter, wherein the processor is configured to establish and allocate a Non-Contention Based (NCB) channel, grant an allocation to a particular WTRU, determine whether the NCB channel is to be reallocated and reallocating the NCB channel based on the reallocation determination.
213. An eNB type node according to embodiment 212, wherein the processor is further configured to configure an NCB channel based on at least one of the following functions:
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Measurements, Physical Resource Request, Schedule Request, Heartbeat Keep Alive, HARQ feedback and Medium Access Control (MAC) / Radio Resource Control (RRC) layer signaling.
214. The eNB type node according to embodiment 212, wherein the processor is further configured to configure an NCB channel based on a combination of time advance functions, measurement reporting, physical resource request, decomposition request, heartbeat keep-alive, HARQ feedback, and MAC / RRC layer signaling.
215. The eNB according to embodiment 212, wherein the processor is further configured to analyze Quality of Service (QoS) requirements.
216. In a wireless communication system including at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), each WTRU includes:
receiver;
transmitter; and a processor in communication with the receiver and transmitter, wherein the processor is configured to receive a Non-Contention Based (NCB) channel grant for transmission, transmit on an NCB channel, and receive NCB channel reassignment.
217. The WTRU of embodiment 216, wherein the processor is further configured to transmit a sync pulse via an NCB channel and perform timing.
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218. The WTRU of embodiment 216, wherein the processor is further configured to transmit channel measurements via an NCB channel to the eNB and receive updated scheduling assignments from the eNB.
219. The WTRU according to embodiment 216, wherein the processor is further configured to transmit the resource request via the NCB channel to the eNB.
220. In a wireless communication system having at least one evolved Node-B (eNB) and a plurality of Wireless Transmit Receive Unit (WTRU), a method for providing a non-contention based (NCB) channel ) - (Non-Contention Based) to multiple WTRUs, the method comprising:
(a) configuring an NCB channel for a function selected from the following functions: time advance, measurement reporting, uplink (UL) physical resource request, information provision for downlink (DL) resource scheduling, heartbeat keep alive, Hybrid Automatic Repeat Reguest (HARQ) feedback and control layer signaling Media Access Control (MAC) - (Medium Access Control) or Radio Resource Control (RRC) - (Radio Resource Control);
(b) allocating an NCB channel to the first WTRU;
(c) determining if an NCB channel reallocation is required; and (d) reallocating the NCB channel based on the reallocation determination.
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221. The method of embodiment 220, wherein the NCB channel is configured for the combination of timing advance, measurement reporting, UL physical resource request, information provision for DL resource scheduling, heartbeat keep alive, HARQ feedback, and MAC / RRC layer signaling. .
222. The method of embodiment 220, wherein the NCB channel is allocated periodically.
223. The method of embodiment 220, wherein the NCB channel is allocated for a duration.
224. The method of embodiment 220, further comprising:
(e) reconfiguring the NCB channel after detecting a period of WTRU Inactivity.
225. The method of embodiment 220, further comprising:
(e) reconfiguring the NCB channel based on the detected event.
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Contents114
10 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10
123 members in 20 offices
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 76379106 | United States of America | P | |
| 88616407 | United States of America | P | |
| 07762898 | European Patent Office (EPO) | A |
Members123
| Document | Office | Kind | |
|---|---|---|---|
| AU2007209869A1 | Australia | A1 | |
| CA2641211A1 | Canada | A1 | |
| WO2007089797A2 | World Intellectual Property Organization (WIPO) | A2 | |
| US2007189205A1 | United States of America | A1 | |
| TW200733673A | Taiwan Province of China | A | |
| WO2007089797A3 | World Intellectual Property Organization (WIPO) | A3 | |
| AR059274A1 | Argentina | A1 | |
| MX2008009730A | Mexico | A | |
| EP1985077A2 | European Patent Office (EPO) | A2 | |
| KR20080096802A | Republic of Korea | A | |
| KR20080099331A | Republic of Korea | A | |
| IL193156A0 | Israel | A0 | |
| IL193156D0 | Israel | D0 | |
| CN101379782A | China | A | |
| JP2009525688A | Japan | A | |
| HK1126601A | Hong Kong, China | A | |
| HK1126601A1 | Hong Kong, China | A1 | |
| RU2008135112A | Russian Federation | A | |
| TW201038090A | Taiwan Province of China | A | |
| BRPI0706896A2 | Brazil | A2 | |
| RU2418370C2 | Russian Federation | C2 | |
| AU2011254021A1 | Australia | A1 | |
| KR101167353B1 | Republic of Korea | B1 | |
| EP2485558A2 | European Patent Office (EPO) | A2 | |
| EP2487983A2 | European Patent Office (EPO) | A2 | |
| JP2012165459A | Japan | A | |
| CN102711267A | China | A | |
| KR20120120435A | Republic of Korea | A | |
| JP5075841B2 | Japan | B2 | |
| JP2013031198A | Japan | A | |
| KR101236255B1 | Republic of Korea | B1 | |
| HK1170898A | Hong Kong, China | A | |
| HK1170898A1 | Hong Kong, China | A1 | |
| KR20130042631A | Republic of Korea | A | |
| KR20130042632A | Republic of Korea | A | |
| CN101379782B | China | B | |
| KR101300913B1 | Republic of Korea | B1 | |
| US8619747B2 | United States of America | B2 | |
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| US2014044078A1 | United States of America | A1 | |
| KR20140041958A | Republic of Korea | A | |
| JP2014068374A | Japan | A | |
| IL193156A | Israel | A | |
| KR101390016B1 | Republic of Korea | B1 | |
| MY151407A | Malaysia | A | |
| KR101433547B1 | Republic of Korea | B1 | |
| TWI451774B | Taiwan Province of China | B | |
| JP5603392B2 | Japan | B2 | |
| AU2011254021B2 | Australia | B2 | |
| TW201503714A | Taiwan Province of China | A | |
| KR20150011380A | Republic of Korea | A | |
| TWI472198B | Taiwan Province of China | B | |
| CN102711267B | China | B | |
| JP2015111864A | Japan | A | |
| KR101538569B1 | Republic of Korea | B1 | |
| EP2485558A3 | European Patent Office (EPO) | A3 | |
| EP2487983A3 | European Patent Office (EPO) | A3 | |
| JP5770818B2 | Japan | B2 | |
| CA2641211C | Canada | C | |
| JP2015167405A | Japan | A | |
| US9203580B2 | United States of America | B2 | |
| US2015358958A1 | United States of America | A1 | |
| KR101596179B1 | Republic of Korea | B1 | |
| KR101596617B1 | Republic of Korea | B1 | |
| TW201608907A | Taiwan Province of China | A | |
| KR20160022948A | Republic of Korea | A | |
| TWI533721B | Taiwan Province of China | B | |
| JP2016105626A | Japan | A | |
| JP6077572B2 | Japan | B2 | |
| JP6122064B2 | Japan | B2 | |
| KR101753882B1 | Republic of Korea | B1 | |
| KR20170080721A | Republic of Korea | A | |
| JP6166394B2 | Japan | B2 | |
| JP2017153115A | Japan | A | |
| US9781708B2 | United States of America | B2 | |
| EP3249829A1 | European Patent Office (EPO) | A1 | |
| US2017367089A1 | United States of America | A1 | |
| EP2485558B1 | European Patent Office (EPO) | B1 | |
| EP2487983B1 | European Patent Office (EPO) | B1 | |
| DK2485558T3 | Denmark | T3 | |
| DK2487983T3 | Denmark | T3 | |
| ES2671560T3 | Spain | T3 | |
| ES2671572T3 | Spain | T3 | |
| EP1985077B1 | European Patent Office (EPO) | B1 | |
| PL2485558T3This record | Poland | T3 | |
| PL2487983T3 | Poland | T3 | |
| DK1985077T3 | Denmark | T3 | |
| KR101900635B1 | Republic of Korea | B1 | |
| ES2686147T3 | Spain | T3 | |
| PL1985077T3 | Poland | T3 | |
| JP2018201229A | Japan | A | |
| EP3249829B1 | European Patent Office (EPO) | B1 | |
| US10271318B2 | United States of America | B2 | |
| DK3249829T3 | Denmark | T3 | |
| US2019191430A1 | United States of America | A1 | |
| EP3514985A1 | European Patent Office (EPO) | A1 | |
| PL3249829T3 | Poland | T3 | |
| JP6568135B2 | Japan | B2 | |
| ES2729185T3 | Spain | T3 | |
| HK1247737B | Hong Kong, China | B |
Numbers
- Publication
- 2485558
- Application
- 12166634
Titles2
- English
- METHOD AND APPARATUS FOR PROVIDING AND UTILIZING A NON-CONTENTION BASED CHANNEL IN A WIRELESS COMMUNICATION SYSTEM
- Polish
- Sposób i urządzenie do zapewniania i wykorzystywania kanału opartego na braku rywalizacji w systemie komunikacji bezprzewodowej
Classification
- CPC, 9
- H04B7/2621
- H04W74/04
- H04W72/21
- H04L1/1812
- H04W56/0045
- H04W72/20
- H04W72/23
- H04L5/0037
- H04W72/1268
- IPC, 6
- H04L5 00
- H04B7 26
- H04L1 18
- H04W56 00
- H04W72 54
- H04W74 04