JP2009522870A - Method and apparatus for selecting multiple transport formats and transmitting multiple transport blocks simultaneously via multiple H-ARQ processes - Google Patents

Abstract

  A method and apparatus for selecting a plurality of transport formats and transmitting a plurality of transport blocks (TB) simultaneously in one TTI by a plurality of H-ARQ processes in a wireless communication system is disclosed. An available physical resource and an H-ARQ process associated with the available physical resource are identified and the channel quality of each of the available available physical resources is determined. A quality of service (QoS) requirement of upper layer data to be transmitted is determined. The upper layer data is mapped to at least two H-ARQ processes. Physical transmission and H-ARQ configuration are determined to support QoS requirements for higher layer data mapped to each H-ARQ process. The TB is generated from the mapped higher layer data according to the physical transmission of each H-ARQ process and the H-ARQ configuration, respectively. TB is sent simultaneously via the H-ARQ process.

Description

  The present invention relates to a wireless communication system. More specifically, the present invention relates to a transmission time interval (TTI) in a wireless communication system by selecting a plurality of transport formats and performing a plurality of hybrid automatic repeat request (H-ARQ) processes. ) For transmitting a plurality of transport blocks (TB) simultaneously.

  Evolved high-speed packet access (HSPA +: evolved high-speed packet access) and universal terrestrial radio access (UTRA: Universal Terrestrial Radio Access) The purpose of Term Evolution is to develop a radio access network for high data rate, low latency, packet optimization, and improved system capacity and coverage. In order to achieve these goals, the development of radio interfaces and radio network architectures is being considered. In HSPA +, the air interface technology will still be based on Code Division Multiple Access (CDMA), but with independent channelization codes (differentiated with respect to channel quality) and multiple input multiple output (MIMO). It has a more efficient physical layer architecture that can include -Input Multiple-Output). In LTE, Orthogonal Frequency Division Multiple Access (OFDMA) and Frequency Division Multiple Access (FDMA) are used as downlink and uplink, respectively, as an interface technology for the downlink and uplink, respectively. ,Proposed.

  H-ARQ has been adopted by several wireless communication standards, including the 3rd Generation Partnership Project (3GPP) and 3GPP2. In addition to the radio link control (RLC) layer automatic repeat request (ARQ) function, H-ARQ improves throughput, compensates for link adaptation errors, and is efficient through the channel. Provides transmission rate. The delay caused by H-ARQ feedback (ie, acknowledgment (ACK) or negative acknowledgment (NACK)) is significantly reduced by placing the H-ARQ function at the Node B rather than the Radio Network Controller (RNC). Is done. A user equipment (UE) receiver can combine the soft bits of the original transmission with the soft bits of the subsequent retransmissions to achieve higher block error rate (BLER) performance. Chase combining or incremental redundancy can be implemented.

  Asynchronous H-ARQ is used in High Speed Downlink Packet Access (HSDPA) and Synchronous H-ARQ is used in High Speed Uplink Packet Access (HSUPA: High Speed Uplink Packet Access). In both HSDPA and HSUPA, the radio resource allocated for transmission is the number of codes in a certain frequency band based on one channel quality indication (CQI) feedback. There is no differentiation between channelization codes. Therefore, one HSDPA medium access control (MAC-hs) flow or one HSUPA medium access control (MAC-e / es) flow multiplexed from a plurality of dedicated channel MAC (MAC-d) flows. One cyclic redundancy code check (CRC) is attached to one transport block, and is assigned to one H-ARQ process.

  New physical layer attributes introduced in HSPA + include MIMO and various channelization codes. New physical layer attributes introduced in LTE include MIMO and various subcarriers (localized or distributed). With the introduction of these new physical layer attributes, the performance of the conventional single H-ARQ scheme and transport format combination (TFC) selection procedure should be changed. In the conventional single H-ARQ scheme, only one H-ARQ process is active at a time, and a TFC of only one transport data block needs to be determined in each TTI. The conventional TFC selection procedure does not have the ability to make a TFC selection for more than one data block for multiple H-ARQ processes.

  The present invention relates to a method and apparatus for selecting a plurality of transport formats and transmitting a plurality of TBs simultaneously in one TTI by a plurality of H-ARQ processes in a wireless communication system. The available physical resources and the channel quality of each of the available physical resources are determined and the H-ARQ process associated with the available physical resource is identified. A quality of service (QoS) requirement of the upper layer data flow to be transmitted is determined. The upper layer data flow is mapped to at least two H-ARQ processes. The physical transmission parameters and H-ARQ configuration that support the QoS requirements of higher layer data flows mapped to each H-ARQ process are determined. The TB is generated from the mapped higher layer data according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process. TB is sent simultaneously via the H-ARQ process.

  A more detailed understanding of the present invention can be obtained from the following description of preferred embodiments, given by way of example and to be understood in conjunction with the accompanying drawings, in which:

  When referred to hereafter, the term “wireless transmit / receive unit (WTRU)” includes, but is not limited to, user equipment (UE), mobile station, fixed or mobile subscriber unit, pager, cellular Included are phones, personal digital assistants (PDAs), computers, or any other type of user device capable of operating in a wireless environment. When referred to hereinafter, the term “base station (BS)” includes, but is not limited to, Node B (Node-B), Evolved Node B (eNB), Site Controller, Access Point (AP ) Or any other type of interface device capable of operating in a wireless environment.

  The present invention is applicable to any wireless communication system including, but not limited to, Wideband Code Division Multiple Access (WCDMA), CDMA2000, HSPA +, 3GPP system LTE, OFDM, MIMO, or OFDM / MIMO. .

  The features of the present invention can be configured in a circuit comprising a number of components that are incorporated into or interconnected with an integrated circuit (IC).

  Different channel qualities may be suffered by different antenna spatial beams or channelization codes, which can be indicated by CQI feedback. The same adaptive modulation coding (AMC) can be applied to all subcarriers, spatial beams, or channelization codes and is independent of the quality of the subcarriers, spatial beams, and channelization codes. Alternatively, different AMCs can be applied to different subcarriers, spatial beams, or channelization codes using channel conditions to maximize performance.

  When AMC is used that depends on subcarriers, spatial beams, or channelization codes, each data block assigned to each subcarrier, spatial beam, or channelization code is associated with one CRC according to the present invention. . Otherwise, because the entire packet is associated with a single CRC, transmission errors require that the entire packet distributed over different subcarriers, spatial beams, or channelization codes be retransmitted. Retransmitting every block of data that has already been correctly received wastes valuable radio resources. Since each antenna may target a different channel condition, the same situation occurs when MIMO is used. Thus, when a multidimensional H-ARQ process is used in a situation where each H-ARQ process corresponds to one or more subcarriers, channelization codes, transmit antennas (or spatial beams), the invention separates A CRC is attached to each transport data block. In the conventional single H-ARQ scheme, only one H-ARQ process is active at a time and only one transport data block TFC needs to be determined in each TTI. Conventional TFC selection procedures do not have the ability to make TFC selection for more than one data block for multiple H-ARQ processes and adequately support the QoS requirements of higher layer data flows.

  FIG. 1 is a block diagram of an apparatus 100 for transmitting a plurality of transport blocks (TB) simultaneously in a transmission time interval (TTI) by a plurality of H-ARQ processes according to the present invention. Apparatus 100 may be a WTRU, Node B, or any other communication device. Apparatus 100 includes a plurality of H-ARQ processes 102a-102n, a plurality of multiplexing and link adaptation processors 104a-104n, and a controller 106. Each multiplexing and link adaptation processor 104a-104n is associated with one H-ARQ process 102a-102n. Each multiplexing and link adaptation processor 104a-104n includes physical resource configurations (ie, distributed or localized subcarriers, MIMO antenna configurations, etc.) and CQIs associated with these physical resources. Receive.

  Each available H-ARQ process 102a-102n is associated with a specific set of physical resources. The association of physical resources to H-ARQ processes 102a-102n can be determined dynamically or the association can be configured semi-statically. A network entity (eg, eNB scheduler) determines how many physical resources should be allocated. The physical resources associated with a particular H-ARQ process are the same every time a TFC is selected by the multiplexing and link adaptation processors 104a-104n or the H-ARQ processors 102a-102n are H-ARQ for a particular TB. Each time a retransmission occurs, it can be dynamically reassigned. Physical resource reallocation can be based on the CQI of a particular physical resource or can be determined based on a pre-defined hopping pattern.

  Multiplexing and link adaptation processors 104a-104n perform link adaptation independently for each set of physical resources and associated H-ARQ processes 102a-102n. Each multiplexing and link adaptation processor 104a-104n determines modulation and coding scheme (MCS), multiplexed TB, transmit power requirement, H-ARQ redundancy version, and maximum number of retransmissions for each TTI. This set of transmission information is provided to each H-ARQ process 102a-102n.

  Physical resources are independent spatial streams in the spatial domain (if MIMO is implemented), independent subcarriers in the frequency domain (if OFDMA or FDMA is implemented), independent channelization codes in the code domain (CDMA is If implemented), it can be defined by independent time slots in the time domain, or any combination thereof. Independent subcarriers can be distributed or localized. A channelization code is a physical resource that can be independently assigned to different TBs. In a CDMA system, different channelization codes can be assigned to transmit one TB or several TBs based on the channel conditions and data rate requirements of each TB. The maximum number of TBs that can be transmitted is less than or equal to the maximum number of available channelization codes. When several independent spatial streams, subcarriers or channelization codes are available, several TBs can be transmitted simultaneously over different physical resources by several H-ARQ processes. For example, if two spatial streams are available in a 2 × 2 MIMO system, two TBs can be transmitted simultaneously over the two spatial streams by two independent H-ARQ processes.

  Different physical resources (ie, different subcarriers, antenna space beams, channelization codes, or time slots) may suffer different channel qualities. The quality of each physical resource is determined by one or more CQI measurements. The CQI can be fed back from the communication peer or can be obtained based on channel correlation. CQI can also be expressed in terms of allowed MCS and / or maximum transport block size.

  Controller 106 identifies the available physical resources and the H-ARQ process associated with the available physical resources. Since each H-ARQ process 102a-102n is associated with a particular physical resource, when an available physical resource is identified, the available H-ARQ process is also identified. Available physical resources and associated H-ARQ processes can be determined at the beginning of a common TTI boundary. The association can also be quasi-statically configured over multiple TTI periods.

  Available physical resources include the number of independent spatial streams, subcarriers, channelization codes, and time slots that can be used for data transmission within a period of time. The physical resources available to one WTRU are the number of WTRUs that the Node B needs to support in one cell, the interference level from other cells, the channel conditions of the WTRU, and the services that the WTRU needs to support The QoS level (such as priority, latency, fairness or buffer status) depends on many factors such as the data rate that a single WTRU needs to support.

  In accordance with the present invention, multiple H-ARQ processes 102a-102n operate simultaneously and in parallel. Since the H-ARQ process 102a-102n may take a different number of retransmissions for a successful transmission, the data flow mapped to that H-ARQ process 102a-102n is the maximum of different retransmissions. Some H-ARQs may not be available if the H-ARQ processes are not synchronized with each other because they may have QoS requirements that determine the number and different TTI sizes. Any number of H-ARQ processes may be available in any TTI. In accordance with the present invention, more than one H-ARQ process and associated set of physical resources are made available in one common TTI. The association between the H-ARQ process and the physical resource is coordinated by the controller 106.

  The controller 106 performs upper layer data flows 108a-108m (ie, multiple flows of MAC or RLC protocol data units (PDUs)), at least two multiplexing and link adaptation processors 104a-104n, and their associated H Map to ARQ processes 102a-102n. The same upper layer data flows 108a-108m may be mapped to more than one multiplexing and link adaptation processors 104a-104n and H-ARQ processes 102a-102n in one common TTI for QoS normalization. By mapping the same upper layer data flow or set of upper layer data flows to multiple H-ARQ processes, the QoS requirements across H-ARQ processes 102a-102n are common. In this case, each multiplexing and link adaptation processor 104a-104n ensures that the QoS achieved for each transmission of the upper layer data flow or data flow set is as similar as possible due to the CQI of the set of associated physical resources. MCS, transport block size, transmission power, maximum H-ARQ transmission, and transmission parameters are determined.

  Alternatively, upper layer data flows 108a-108m, which can be grouped according to QoS requirements, can be differentiated based on the data flow QoS requirements and the CQI associated with the set of physical resources assigned to each H-ARQ process. By mapping to ARQ processes 102a-102n, non-uniform error protection can also be achieved. For example, the CQI can indicate that one set of physical resources is better than another set of physical resources. Higher layer data flows with higher QoS requirements can be mapped to H-ARQ processes associated with better physical resources. The number of higher layer data flows to be mapped to a particular H-ARQ process is determined based on the QoS requirements, packet size, H-ARQ capacity, etc. of the higher layer data flow. Once each upper layer data flow to be transmitted using a particular H-ARQ process is determined, those data flows are sent to the different H-ARQ processes through the multiplexing and link adaptation processors 104a-104n. Multiplexed.

  Each multiplexing and link adaptation processor 104a-104n receives input (CQI of allocated physical resources, buffer occupancy of the mapped data flow, etc.) and is mapped to each H-ARQ process. Determine physical transmission parameters and H-ARQ configuration to support a QoS requirement of ~ 108m. Physical transmission parameters include transmission power, modulation and coding scheme, TTI size, transport block size and beamforming pattern, subcarrier allocation, MIMO antenna configuration, and so on. H-ARQ configuration parameters include H-ARQ identification, maximum number of retransmissions, redundancy version (RV), CRC size, and the like. Multiplexing and link adaptation processors 104a-104n provide H-ARQ configuration parameters to associated H-ARQ processes 102a-102n.

  Multiplexing and link adaptation processors 104a-104n may apply the same MCS, transport block size, TTI size, and / or transmit power to all physical resources independent of the physical resource quality. Alternatively, multiplexing and link adaptation processors 104a-104n may apply different MCS, transport block size, TTI size, and / or transmit power to different physical resources based on channel conditions to maximize performance. Can do.

  When physical resource dependent AMC and H-ARQ operations are used, each data block assigned to each physical resource is preferably associated with a separate CRC. With this scheme, each transport block is associated with a separate CRC and processed by a separate H-ARQ process 102a-102n, so that in the event of a transmission error, the entire packet distributed over different physical resources needs to be retransmitted There is no.

  Multiplexing and link adaptation processors 104a-104n then apply the appropriate TFC (ie, TB size, TB set aggregate size, TTI size, modulation and coding scheme (based on the channel quality indicator and physical transmission parameters)). MCS), transmit power, antenna beam, subcarrier allocation, CRC size, redundancy version (RV), and data block to radio resource mapping, etc.), and then the assigned higher layer data flows 112a-112m to TB Is generated. One or more upper layer data flows can be multiplexed into one TB. A separate CRC is attached to each of the TBs for separate error detection and H-ARQ processes. Each TB and associated transmission parameters are provided for assigned H-ARQ processes 102a-102n. The TB is then transmitted via the assigned H-ARQ processes 102a-102n, respectively.

  Parameters that support multiple H-ARQ processes can be signaled to the receiving peer to decode the transmission parameters prior to using transmission or blind detection techniques at the receiving peer. The TB generated with the associated transmission parameters is sent to H-ARQ processes 102a-102n for transmission.

  FIG. 2 is a flow diagram of a process 200 for transmitting multiple TBs simultaneously in one TTI over multiple H-ARQ processes in accordance with the present invention. The available physical resources associated with each H-ARQ process 102a-102n and their channel quality are identified (step 202). The QoS requirements and buffer occupancy of the upper layer data flows 112a-112m to be transmitted are determined (step 204). It should be noted that the steps in process 200 can be performed in a different order, and some steps can be performed in parallel. For example, step 204 can be applied before or simultaneously with step 202.

  Controller 106 can determine the type of those upper layer data flows 112a-112m for TFC selection processing based on QoS parameters associated with the upper layer data flows. The controller 106 can also determine the order in which higher layer data flows are serviced. The order of processing can be determined by QoS requirements or absolute priority. Alternatively, the controller 106 may prioritize or discard higher layer data packets based on lifetime parameters when determining the duration that upper layer data packets can remain in the H-ARQ queue. Lifetime parameters can be used as possible.

  Upper layer data flows 112a-112 are mapped by controller 106 to respective H-ARQ processes 102a-102n. The physical transmission parameters and H-ARQ configuration may be used to support the required QoS of higher layer data flows 112a-112m mapped to each of the H-ARQ processes 102a-102n. A determination is made for each of 102n (step 206). When more than one H-ARQ process is available in one TTI transmission, it is necessary to determine which upper layer data flow 112a-112m should be mapped to a different H-ARQ process It is. Upper layer data flows 112a-112m may or may not have similar QoS requirements.

  When all or a subset of the upper layer data flows 112a-112m to be mapped to different H-ARQ processes require similar QoS, the QoS provided by the H-ARQ processes 102a-102n is normalized (ie , Transmission parameters (such as MCS, TB size, and transmit power), and H-ARQ configuration for each TTI for which one TFC is selected, as well as the QoS provided across H-ARQ processes 102a-102n Adjusted to be). QoS normalization across multiple H-ARQ processes 102a-102n may be achieved by adjusting link adaptation parameters (eg, MCS, TB size, transmit power, etc.) across H-ARQ processes 102a-102n. For example, a higher MCS can be assigned to physical resources having better channel quality, and a lower MCS can be assigned to physical resources having worse channel quality. This may result in different sizes of data blocks that are multiplexed for different H-ARQ processes.

  Alternatively, when the upper layer data flows 112a-112m require different QoS, the upper layer data flows 112a-112m are associated with physical resources having a quality that closely matches the QoS requirements of the upper layer data flows 112a-112m. To H-ARQ processes 102a-102n. The advantage of using multiple H-ARQ processes is their flexibility for multiplexed logical channels or MAC flows with different QoS requirements for different H-ARQ processes 102a-102n and associated physical resources. . When one physical resource exhibits better channel quality than others, data with higher QoS is mapped by the H-ARQ process associated with that physical resource. This enhances the use of physical resources and maximizes system throughput. Alternatively or additionally, the maximum number of MCS and / or retransmissions can be configured to differentiate QoS and closely match the QoS requirements of the logical channel or MAC flow.

  After the upper layer data flows 112a-112m are mapped to the H-ARQ processes 102a-102n, the TB of each H-ARQ process 102a-102n is the upper layer data flow 112a associated with each H-ARQ process 102a-102n. Is generated according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process 102a-102n, respectively (step 208). The data multiplexed for each H-ARQ process 102a-102n can be processed sequentially or in parallel. The TB is then transmitted simultaneously via the associated H-ARQ process 102a-102n (step 210).

  The transmitted TB may or may not be successfully received at the communication peer. The failed TB is retransmitted in a subsequent TTI. For soft combining at the communication peer, the size of the retransmitted TB preferably remains the same. Several options are possible for retransmission of a failed TB.

  According to the first option, the physical resources allocated for the TB's H-ARQ retransmission remain unchanged (ie, the failed TB is retransmitted via the same physical resource and H-ARQ process). . Transmission parameters and H-ARQ configuration (ie, TFC) may be changed. Specifically, link adaptation parameters (such as antenna selection, AMC, or transmit power) can be changed to maximize the opportunity for successful delivery of the retransmitted TB. When the link adaptation parameter is changed due to a failed TB retransmission, the changed parameter can be signaled to the receiving peer. Alternatively, blind detection techniques can be applied at the receiving peer to remove signaling overhead for changed parameters.

  According to the second option, the physical resources allocated for H-ARQ retransmission of the transport block can be dynamically reassigned (ie, the failed TB is on a different physical resource and the same H-ARQ process). Will be resent on). Physical resource reallocation can be based on CQI or based on a known hopping pattern.

  According to another option, failed H-ARQ transmissions can be fragmented across multiple H-ARQ processes, and each fragment can be sent independently to increase the probability of successful H-ARQ transmissions. According to this option, physical resources for the retransmitted TB are newly allocated (ie, the failed TB is sent via a different H-ARQ process). The H-ARQ process used to send the failed TB in the previous TTI becomes available for transmission of any other TB in the subsequent TTI. Maximum transmit power, number of subcarriers or channelization codes, number or allocation of antennas, and recommended MCS can be reallocated for retransmission of failed TBs. Preferably, a new allowed TFCS subset can be generated to reflect the physical resource changes of the failed TB. New parameters can signal the receiving peer to ensure successful reception. Alternatively, blind detection techniques can be applied at the receiving peer to remove the signaling overhead of the modified parameters.

Embodiment 1. A method for transmitting a plurality of TBs in one TTI by a plurality of H-ARQ processes in a wireless communication system.

  2. 2. The method of embodiment 1 comprising identifying available physical resources and associated H-ARQ processes.

  3. [0069] 3. The method as in any of the embodiments 1-2, comprising obtaining a channel quality measurement for each of the available physical resources.

  4). [0069] 4. The method as in any of the embodiments 1-3 comprising mapping at least one higher layer data flow to at least two H-ARQ processes.

  5). 5. The method of embodiment 4 comprising determining physical transmission parameters and H-ARQ configuration to support QoS requirements of the higher layer data flow mapped to each H-ARQ process.

  6). 6. The method of embodiment 5 comprising generating TBs from the mapped higher layer data flows, respectively, according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process.

  7. Embodiment 7. The method of embodiment 6 comprising the step of transmitting the TB simultaneously via the H-ARQ process.

  8). [0069] 8. The method as in any of the embodiments 5-7, wherein the physical transmission parameter and the H-ARQ configuration includes a TFC for each TB.

  9. [0069] 9. The method as in any of the embodiments 2-8, wherein the communication node includes a plurality of antennas for MIMO, and the available physical resources are identified based on independent spatial data streams.

  10. [0069] 10. The method as in any of the embodiments 2-9, wherein the available physical resource is identified based on an independent frequency subcarrier.

  11. [0072] 11. The method of embodiment 10 wherein the subcarriers are distributed subcarriers.

  12 [0069] 11. The method of embodiment 10 wherein the subcarrier is a localized subcarrier.

  13. [0069] 13. The method as in any of the embodiments 2-12, wherein the available physical resource is identified based on an independent channelization code.

  14 [0069] 14. The method as in any of the embodiments 2-13, wherein the available physical resource is identified based on different time slots.

  15. 15. The method as in any one of embodiments 2-14, wherein the association of the physical resource and the H-ARQ process is determined dynamically.

  16. 15. The method as in any of the embodiments 2-14, wherein the association of the physical resource and the H-ARQ process is configured semi-statically.

  17. 15. The method as in any of the embodiments 4-16, further comprising selecting an upper layer data flow to be transmitted in a next TTI, whereby only the selected upper layer data flow is mapped to the H-ARQ process. Method.

  18. 18. The method of embodiment 17 wherein each upper layer data flow packet is assigned a lifetime, and the selection of packets for transmission is made based on the lifetime.

  19. Embodiments 5-18 wherein the physical transmission and H-ARQ configuration are determined such that the QoS across the available H-ARQ processes is similar when the QoS requirements of the upper layer data flow are similar. Either way.

  20. [0060] 20. The method of embodiment 19, wherein a high order MCS is applied to an H-ARQ process with high channel quality and a low order MCS is applied to an H-ARQ process with low channel quality.

  21. [0069] 21. The method as in any of the embodiments 19-20, wherein a maximum number of retransmissions is assigned to each H-ARQ process based on the QoS requirements of higher layer data flows mapped to the H-ARQ process.

  22. When the QoS requirements of the upper layer data flows are not similar, each of the upper layer data flows is mapped to an H-ARQ process associated with a channel quality that closely matches the QoS requirements of the upper layer data flow. The method of any of embodiments 5-18.

  23. Embodiment wherein the maximum number of retransmissions is assigned to an H-ARQ process based on the QoS requirement of the upper layer data flow mapped to the H-ARQ process when the QoS requirement of the upper layer data flow is not similar The method in any one of 5-18.

  24. [0069] 24. The method as in any of the embodiments 2-23, wherein the physical resource mapped to the H-ARQ process is invariant to the retransmission of the TB when the transmission of the TB fails.

  25. [0072] 25. The method of embodiment 24, wherein physical transmission and H-ARQ configuration are changed for the retransmission of the TB.

  26. [0069] 25. The method of embodiment 24, wherein the TB is fragmented for retransmission.

  27. 24. The method as in any of the embodiments 2-23, wherein the physical resource mapped to the TB is changed with respect to the retransmission of the TB when the transmission of the TB fails.

  28. 28. The method as in any of the embodiments 1-27, wherein the wireless communication system is an HSPA + system.

  29. 28. The method as in any of the embodiments 1-27, wherein the wireless communication system is LTE of a 3G wireless communication system.

  30. [0069] 30. The method as in any of the embodiments 2-29, wherein the available physical resources and associated H-ARQ processes are determined at the beginning of a common TTI boundary.

  31. [0069] 31. The method as in any of the embodiments 5-30, wherein the physical transmission parameter includes an MCS of each TB.

  32. 32. The method of embodiment 31 wherein the MCS of each TB is selected to differentiate the TB's QoS requirements.

  33. 32. The method of embodiment 31 wherein the MCS of each TB is selected such that the QoS supported across the H-ARQ process is similar.

  34. 34. The method as in any of the embodiments 5-33, wherein the physical transmission parameter includes a transport block size of each TB.

  35. 35. The method of embodiment 34, wherein the TB size of each TB is selected to differentiate the QoS requirements of the TB.

  36. 35. The method of embodiment 34, wherein the TB size of each TB is selected such that the QoS supported across the H-ARQ process is similar.

  37. In a wireless communication system, an apparatus for simultaneously transmitting a plurality of TBs by a plurality of H-ARQ processes in one TTI.

  38. 38. The apparatus of embodiment 37 comprising a plurality of H-ARQ processes.

  39. Identify available physical resources and H-ARQ processes associated with the available physical resources, and based on the channel quality of each of the available physical resources and the QoS requirements of the upper layer data flow, at least 1 Map one upper layer data flow to at least two H-ARQ processes, determine physical transmission parameters and H-ARQ configuration to support the QoS requirements of the upper layer data flow mapped to each H-ARQ process 40. The apparatus of embodiment 38 comprising a controller configured as described above.

  40. A plurality of multiplexing and link adaptation processors, whereby each multiplexing and link adaptation processor is associated with one H-ARQ process, and according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process, 40. The apparatus of embodiment 39 configured to generate a TB from the upper layer data flow mapped to the multiplexing and link adaptation processor.

  41. 41. The apparatus of embodiment 40, wherein each multiplexing and link adaptation process determines a TFC for the mapped higher layer data flow.

  42. [00102] 42. The apparatus as in any of the embodiments 39-41, wherein the controller identifies the available physical resources based on independent spatial data streams generated by multiple antennas for MIMO.

  43. [00117] 43. The apparatus as in any of the embodiments 39-42, wherein the controller identifies the available physical resources based on independent subcarriers.

  44. 44. The apparatus of embodiment 43, wherein the subcarriers are distributed subcarriers.

  45. 44. The apparatus of embodiment 43, wherein the subcarrier is a localized subcarrier.

  46. [00102] 46. The apparatus as in any of the embodiments 39-45, wherein the controller identifies the available physical resources based on an independent channelization code.

  47. [00102] 47. The apparatus as in any of the embodiments 39-46, wherein the available physical resources are identified based on different time slots.

  48. [00102] 48. The apparatus as in any of the embodiments 39-47, wherein the association between the physical resource and the H-ARQ process is determined dynamically.

  49. [00102] 48. The apparatus as in any of the embodiments 39-47, wherein the association of the physical resource and the H-ARQ process is configured semi-statically.

  50. 39. The embodiments 39-39, wherein the controller is configured to select at least one higher layer data flow to be transmitted in a next TTI and map only the selected higher layer data flow to the H-ARQ process. 49. The device according to any one of 49.

  51. 51. The apparatus of embodiment 50, wherein packets on the upper layer data flow are assigned a lifetime, whereby the controller selects a packet for transmission based on the lifetime.

  52. Embodiment 39 wherein the controller determines the physical transmission and H-ARQ configuration to normalize QoS across the available H-ARQ processes when the upper layer data flow has similar QoS requirements. The device of any one of -51.

  53. 53. The apparatus of embodiment 52, wherein the controller applies a high order MCS to an H-ARQ process with high channel quality and applies a low order MCS to an H-ARQ process with low channel quality.

  54. 53. The apparatus of embodiment 52, wherein the controller assigns a maximum retransmission limit to each H-ARQ process based on the QoS requirements of the higher layer data mapped to the H-ARQ process.

  55. Embodiment where the controller maps the upper layer data to an H-ARQ process associated with a channel quality that closely matches the QoS requirement of the upper layer data when the QoS requirements of the upper layer data are not similar The apparatus in any one of 39-51.

  56. Embodiment wherein the controller assigns a maximum retransmission limit to an H-ARQ process based on the QoS requirement of the upper layer data mapped to the H-ARQ process when the QoS requirements of the upper layer data are not similar The apparatus in any one of 39-51.

  57. [00102] 57. The apparatus as in any of the embodiments 39-56, wherein the controller allocates the same physical resource for the retransmission of the TB when the transmission of the TB fails.

  58. [00102] 58. The apparatus of embodiment 57, wherein the controller changes a physical transmission and an H-ARQ configuration for the retransmission of the TB.

  59. [00117] 59. The apparatus as in any of the embodiments 57-58, wherein the controller fragments the TB for retransmission.

  60. [00117] 57. The apparatus as in any of the embodiments 39-56, wherein the controller changes a physical resource for the retransmission of the TB when the transmission of the TB fails.

  61. The apparatus of any of embodiments 37-60, wherein the wireless communication system is an HSPA + system.

  62. The apparatus of any of embodiments 37-60, wherein the wireless communication system is LTE of a 3G wireless communication system.

  63. [00102] 63. The apparatus as in any of the embodiments 39-62, wherein the available physical resources and associated H-ARQ processes are determined at the beginning of a common TTI boundary.

  64. [00102] 64. The apparatus as in any of the embodiments 39-63, wherein the physical transmission parameter includes an MCS of each TB.

  65. [00102] 65. The apparatus of embodiment 64, wherein each TB's MCS is selected to differentiate the TB's QoS requirements.

  66. [00102] 65. The apparatus of embodiment 64, wherein the MCS of each TB is selected such that the QoS supported across the H-ARQ process is similar.

  67. [00102] 67. The apparatus as in any of the embodiments 39-66, wherein the physical transmission parameter includes a transport block size of each TB.

  68. 68. The apparatus of embodiment 67, wherein the TB size of each TB is selected to differentiate the QoS requirements of the TB.

  69. 68. The apparatus of embodiment 67, wherein the TB size of each TB is selected such that the QoS supported across H-ARQ processes is similar.

  Although the features and components of the invention have been described in specific combinations in the preferred embodiments, each feature or component is alone or without other features and components of the preferred embodiments. It can be used in various combinations with or without other features and components. The method or flowchart provided in the present invention can be implemented in a computer program, software, or firmware tangibly embodied in a computer readable storage medium for execution by a general purpose computer or processor. . Examples of computer readable storage media include read only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, magnetic media such as internal hard disks and removable disks, magneto-optical media, and CDs -Optical media such as ROM discs and digital versatile discs (DVDs) are included.

  Suitable processors include, by way of example, general purpose processors, special purpose processors, conventional processors, digital signal processors (DSPs), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, A controller, ASIC, FPGA circuit, any other type of integrated circuit (IC), and / or state machine is included.

  The processor associated with the software implements a radio frequency transceiver for use in a radio transceiver unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer. Can be used for The WTRU includes a camera, a video camera module, a videophone, a speakerphone, a vibrating device, a speaker, a microphone, a TV transceiver, a hands-free handset, a keyboard, a Bluetooth (registered trademark) module, and a frequency modulated (FM) wireless. Hardware such as units, liquid crystal (LCD) display devices, organic light emitting diode (OLED) display units, digital music players, media players, video game player modules, Internet browsers, and / or any wireless local area network (WLAN) modules And / or can be used in conjunction with modules implemented in software.

1 is a block diagram of an apparatus constructed in accordance with the present invention. FIG. 6 is a flow diagram of a process for simultaneously transmitting multiple TBs in one TTI by multiple H-ARQ processes according to the present invention.

Claims (60)

A method for transmitting a plurality of transport blocks (TB) in a transmission time interval (TTI) by a plurality of hybrid automatic repeat request (H-ARQ) processes in a wireless communication system, comprising:
Identifying available physical resources and associated H-ARQ processes;
Obtaining a channel quality measurement of each of the available available physical resources;
Mapping at least one higher layer data flow to at least two H-ARQ processes;
Determining physical transmission parameters and H-ARQ configuration to support quality of service (QoS) requirements of the upper layer data flow mapped to each H-ARQ process;
Each generating a transport block (TB) from the mapped higher layer data flow according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process;
Transmitting the TB simultaneously via the H-ARQ process.   The method of claim 1, wherein the physical transmission parameter and the H-ARQ configuration include a transport format combination (TFC) of each TB.   The communication node includes a plurality of antennas for multiple input multiple output (MIMO), and the available physical resources are identified based on independent spatial data streams. the method of.   The method of claim 1, wherein the available physical resources are identified based on independent frequency subcarriers.   The method of claim 4, wherein the subcarriers are distributed subcarriers.   The method of claim 4, wherein the subcarrier is a localized subcarrier.   The method of claim 1, wherein the available physical resources are identified based on independent channelization codes.   The method of claim 1, wherein the available physical resources are identified based on different time slots.   The method of claim 1, wherein the association of the physical resource and the H-ARQ process is determined dynamically.   The method of claim 1, wherein the association of the physical resource and the H-ARQ process is configured semi-statically.   The method of claim 1, further comprising selecting an upper layer data flow to be transmitted in a next TTI, whereby only the selected upper layer data flow is mapped to the H-ARQ process. The method described in 1.   The method of claim 11, wherein each upper layer data flow packet is assigned a lifetime, whereby the selection of packets for transmission is made based on the lifetime.   When the QoS requirements of the upper layer data flow are similar, the physical transmission and H-ARQ configuration are determined such that the QoS across the available H-ARQ processes is similar. The method of claim 1.   The high-order modulation and coding scheme (MCS) is applied to an H-ARQ process having a high channel quality, and the low-order MCS is applied to an H-ARQ process having a low channel quality. Item 14. The method according to Item 13.   The method of claim 13, wherein a maximum number of retransmissions is assigned to each H-ARQ process based on the QoS requirements of higher layer data flows mapped to the H-ARQ process.   When the QoS requirements of the upper layer data flows are not similar, each of the upper layer data flows is mapped to an H-ARQ process associated with a channel quality that closely matches the QoS requirements of the upper layer data flow. The method according to claim 1.   When the QoS requirement of the upper layer data flow is not similar, the maximum number of retransmissions is assigned to the H-ARQ process based on the QoS requirement of the upper layer data flow mapped to the H-ARQ process. The method of claim 1, characterized in that:   The method of claim 1, wherein the physical resources mapped to the H-ARQ process are invariant to retransmission of the TB when a TB transmission fails.   The method of claim 18, wherein physical transmission and H-ARQ configuration are changed for retransmission of the TB.   The method of claim 18, wherein the TB is fragmented for retransmission.   The method of claim 1, wherein the physical resource mapped to the TB is changed for the retransmission of the TB when the transmission of the TB fails.   The method of claim 1, wherein the wireless communication system is an evolved high-speed packet access (HSPA +) system.   The method of claim 1, wherein the wireless communication system is a long-term development (LTE) of a third generation (3G) wireless communication system.   The method of claim 1, wherein the available physical resources and associated H-ARQ processes are determined at the beginning of a common TTI boundary.   The method of claim 1, wherein the physical transmission parameters include modulation and coding scheme (MCS) of each TB.   26. The method of claim 25, wherein each TB's MCS is selected to differentiate the TB's QoS requirements.   The method of claim 25, wherein the MCS of each TB is selected such that the QoS supported across the H-ARQ process is similar.   The method of claim 1, wherein the physical transmission parameter includes a transport block size of each TB.   29. The method of claim 28, wherein the TB size of each TB is selected to differentiate the QoS requirements of the TB.   29. The method of claim 28, wherein a TB size for each TB is selected such that the QoS supported across the H-ARQ process is similar. In a wireless communication system, an apparatus for simultaneously transmitting a plurality of transport blocks (TB) in one transmission time interval (TTI) by a plurality of hybrid automatic repeat request (H-ARQ) processes,
Multiple H-ARQ processes;
Identify available physical resources and H-ARQ processes associated with the available physical resources, based on channel quality of each of the available physical resources and quality of service (QoS) requirements of the upper layer data flow Mapping at least one higher layer data flow to at least two H-ARQ processes, and supporting physical transmission parameters and H− to support the QoS requirements of the higher layer data flow mapped to each H-ARQ process. A controller configured to determine an ARQ configuration;
A plurality of multiplexing and link adaptation processors, each multiplexing and link adaptation processor being associated with one H-ARQ process, according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process; A plurality of multiplexing and link adaptation processors configured to generate a TB from the upper layer data flow mapped to the multiplexing and link adaptation processor.   32. The apparatus of claim 31, wherein each multiplexing and link adaptation process determines a transport format combination (TFC) of the mapped upper layer data flow.   The apparatus of claim 31, wherein the controller identifies the available physical resources based on independent spatial data streams generated by multiple antennas for multiple input multiple output (MIMO). .   The apparatus of claim 31, wherein the controller identifies the available physical resources based on independent subcarriers.   The apparatus of claim 34, wherein the subcarriers are distributed subcarriers.   35. The apparatus of claim 34, wherein the subcarrier is a localized subcarrier.   The apparatus of claim 31, wherein the controller identifies the available physical resources based on an independent channelization code.   32. The apparatus of claim 31, wherein the available physical resources are identified based on different time slots.   The apparatus of claim 31, wherein the association of the physical resource and the H-ARQ process is determined dynamically.   32. The apparatus of claim 31, wherein the association of the physical resource and the H-ARQ process is configured statically.   The controller is configured to select at least one higher layer data flow to be transmitted in a next TTI and map only the selected higher layer data flow to the H-ARQ process. The apparatus of claim 31.   42. The apparatus of claim 41, wherein packets of the upper layer data flow are assigned a lifetime, whereby the controller selects a packet for transmission based on the lifetime.   When the QoS requirements of the upper layer data flow are similar, the controller determines the physical transmission and H-ARQ configuration to normalize QoS across the available H-ARQ processes. 32. The apparatus of claim 31.   The controller applies a high-order modulation and coding scheme (MCS) to an H-ARQ process having a high channel quality, and applies a low-order MCS to an H-ARQ process having a low channel quality. 44. The apparatus of claim 43.   44. The apparatus of claim 43, wherein the controller assigns a maximum retransmission limit to each H-ARQ process based on the QoS requirements of the higher layer data mapped to the H-ARQ process.   When the QoS requirements of the upper layer data are not similar, the controller maps the upper layer data to an H-ARQ process associated with a channel quality that closely matches the QoS requirements of the upper layer data. 32. The apparatus of claim 31.   When the QoS requirements of the upper layer data are not similar, the controller assigns a maximum retransmission limit based on the QoS requirements of the upper layer data mapped to the H-ARQ process for H-ARQ processing 32. The apparatus of claim 31, wherein:   The apparatus of claim 31, wherein the controller allocates the same physical resources for retransmission of the TB when the transmission of the TB fails.   49. The apparatus of claim 48, wherein the controller changes a physical transmission and an H-ARQ configuration for the retransmission of the TB.   49. The apparatus of claim 48, wherein the controller fragments the TB for retransmission.   The apparatus of claim 31, wherein the controller changes physical resources for retransmission of the TB when transmission of the TB fails.   32. The apparatus of claim 31, wherein the wireless communication system is an evolved high-speed packet access (HSPA +) system.   32. The apparatus of claim 31, wherein the wireless communication system is a long-term development (LTE) of a third generation (3G) wireless communication system.   The apparatus of claim 31, wherein the available physical resources and associated H-ARQ processes are determined at the beginning of a common TTI boundary.   The apparatus of claim 31, wherein the physical transmission parameters include modulation and coding scheme (MCS) of each TB.   56. The apparatus of claim 55, wherein each TB's MCS is selected to differentiate the TB's QoS requirements.   56. The apparatus of claim 55, wherein the MCS of each TB is selected such that the QoS supported across the H-ARQ process is similar.   The apparatus of claim 31, wherein the physical transmission parameters include a transport block size of each TB.   59. The apparatus of claim 58, wherein the TB size of each TB is selected to differentiate the QoS requirements of the TB.   59. The apparatus of claim 58, wherein the TB size of each TB is selected such that the QoS supported across H-ARQ processes is similar.

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