KR101516137B1 - Method and apparatus for selecting multiple transport formats and transmitting multiple transport blocks simultaneously with multiple h-arq processes - Google Patents

Abstract

A method and apparatus for selecting multiple transport formats simultaneously and transmitting multiple transport blocks (TBs) during a transmission time interval (TTI) using multiple hybrid automatic repeat request (H-ARQ) processes in a wireless communication system are disclosed. The available physical resources and the H-ARQ process associated with this available resource are identified and the channel quality for each of the available physical resources is determined. The quality of service (QoS) requirements of the higher layer data to be transmitted are determined. The higher layer data is mapped to at least two H-ARQ processes. The physical transmission and H-ARQ configuration to support the QoS requirements of the higher layer data mapped to each H-ARQ process is determined. TBs are generated from the upper layer data mapped according to the physical transmission and H-ARQ configuration of each H-ARQ process. TBs are transmitted simultaneously through the H-ARQ process.

Description

METHOD AND APPARATUS FOR SELECTING MULTIPLE TRANSMISSION FORMATS AND TRANSMITTING MULTIPLE TRANSPORT BLOCKS SIMULTANEOUSLY WITH MULTIPLE H-ARQ PROCESSES BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for simultaneously selecting multiple transmission formats and transmitting multiple transmission blocks (TB) during a transmission time interval (TTI) using multiple hybrid automatic repeat request (H-ARQ) ≪ / RTI >

The goals of evolved high speed packet access (HSPA +) and universal terrestrial radio access (UTRA) and universal terrestrial radio access network (UTRAN) long term evolution (LTE) are high data rate, low latency, packet optimization, And to develop a wireless access network for coverage. To achieve this goal, evolution of wireless interfaces and wireless network architectures is being considered. In HSPA +, the air interface technology is still based on code division multiple access (CDMA), but it is not possible to use a more efficient physical layer, which may include independent channelization codes (differentiated with respect to channel quality), and multiple input multiple output (MIMO) Structure. In LTE, orthogonal frequency division multiple access (OFDMA) and frequency division multiple access (FDMA) have been proposed as technologies with radio interfaces that are used for the downlink and uplink, respectively.

 H-ARQ has been adopted by several wireless communication standards including the 3rd Generation Partnership Project (3GPP) and 3GPP2. In addition to the automatic retransmission request (ARQ) function of the radio link control (RLC) layer, H-ARQ improves throughput, compensates for link adaptation errors, and provides an efficient transmission rate over the channel. (I.e., an acknowledgment (ACK) or negative acknowledgment (NACK)) due to H-ARQ feedback is significantly reduced by placing the H-ARQ functionality at the Node B rather than the radio network controller (RNC). The user equipment (UE) can combine the soft bits of the original transmission with the soft bits of the subsequent retransmission to achieve a high block error rate (BLER) performance. A chase combining method or a redundancy increasing method may 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). In both HSDPA and HSUPA, the radio resource allocated for transmission is the number of codes in a particular frequency band based on the channel quality indicator (CQI) feedback. There is no difference 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 multiple dedicated channel MAC (MAC-d) And one cyclic redundancy check (CRC) is attached to one transport block.

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

It is an object of the present invention to provide a method and apparatus for simultaneously selecting multiple transmission formats and transmitting multiple TBs during a TTI using multiple H-ARQ processes in a wireless communication system.

The present invention relates to a method and apparatus for simultaneously selecting multiple transmission formats and transmitting multiple TBs during a TTI using multiple H-ARQ processes in a wireless communication system. The channel quality of each of the available physical resources and available physical resources is determined and the H-ARQ processes associated with the available physical resources are identified. The quality of service (QoS) requirements of the upper layer data flow (s) to be transmitted are determined. The upper layer data flow (s) are mapped to at least two H-ARQ processes. The physical transmission parameters and the H-ARQ configuration are determined to support the QoS requirements of the upper layer data flow (s) being mapped to each H-ARQ process. TBs are respectively generated from the upper layer data flow (s) mapped according to the physical transmission parameters of each H-ARQ process and the H-ARQ configuration. TBs are transmitted simultaneously through H-ARQ processes.

In accordance with the present invention, the method and apparatus of the present invention are capable of simultaneously selecting multiple transport formats during a transmission time interval (TTI) using multiple hybrid automatic repeat request (H-ARQ) processes in a wireless communication system, Lt; / RTI >

The invention can be understood in more detail from the following description of a preferred embodiment, provided by way of example and with reference to the accompanying drawings, in which:
1 is a block diagram of an apparatus constructed in accordance with the present invention;
2 is a flow diagram of a process for simultaneously transmitting multiple TBs during a TTI using multiple H-ARQ processes in accordance with the present invention;

The term "WTRU" when referred to hereafter includes a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal digital assistant But is not limited to, any other type of user device capable of operating in an environment. The term " base station "includes a Node B, an evolved Node B (eNB), a site controller, an access point (AP) or any other type of interfacing 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), CDMA 2000, HSPA +, LTE and 3GPP systems, OFDM, MIMO or OFDM / MIMO.

The features of the present invention may be integrated on an integrated circuit (IC), or may be configured in a circuit comprising a plurality of interconnecting components.

Different antenna spatial beams or channelization codes may experience different channel qualities that may be indicated by CQI feedback. Regardless of the quality of the subcarriers, spatial beams and channelization codes, the same adaptive modulation and coding (AMC) can be applied to all subcarriers, spatial beams or channelization codes. Alternatively, to maximize performance, channel conditions may be used to apply different AMCs to different subcarriers, spatial beams, or channelization codes.

If an AMC dependent on a subcarrier, spatial beam or channelization code is used, each data block allocated to each subcarrier, spatial beam or channelization code is associated with one CRC in accordance with the present invention. Otherwise, when a transmission error occurs, the entire packet distributed to different subcarriers, spatial beams, or channelization codes needs to be transmitted, since the entire packet is associated with a single CRC. Retransmitting all previously correctly received data blocks is a waste of valuable radio resources. In the case where MIMO is used, the same situation occurs because each antenna can be affected by different channel conditions. Thus, when a multi-dimensional H-ARQ process with each H-ARQ process corresponding to one or more subcarriers, channelization codes, transmit antennas (or spatial beams) is used, Is attached to each transmission data block. In the conventional single H-ARQ scheme, only one H-ARQ process is activated at a time, and the TFC of only one transport block data needs to be determined for each TTI. Conventional TFC selection procedures do not have the ability to select a TFC for more than one data block of multiple H-ARQ processes to adequately support the QoS requirements of the higher layer data flow.

1 is a block diagram of an apparatus 100 for simultaneously transmitting multiple transport blocks (TBs) during a transmission time interval (TTI) using multiple H-ARQ processes in accordance with the present invention. Apparatus 100 may be a WTRU, a Node B, or any other communications device. The 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 receives a physical resource configuration (i.e., a distributed subcarrier or centralized subcarrier, a MIMO antenna configuration, etc.), and a CQI associated with this physical resource.

Each available H-ARQ process 102a-102n is associated with a particular set of physical resources. The combination of physical resources to the H-ARQ process 102a-102n may be determined dynamically, or the combination may be semi-statically configured. The network entity (eNB scheduler, for example) determines how much physical resources should be allocated. Each time a TFC is selected by the multiplexing and link adaptation processor 104a-104n or whenever the H-ARQ processor 102a-102n generates an H-ARQ retransmission for a particular TB, Associated physical resources may be dynamically reallocated. The reallocation of physical resources may be performed based on the CQI of a particular physical resource or may be determined based on a predetermined hopping pattern.

The multiplexing and link adaptation processor 104a-104n performs 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 requirements, H-ARQ redundancy version, and maximum number of retransmissions in each TTI. This set of transmission information is provided to each H-ARQ process 102a-102n.

The physical resource may be an independent spatial stream (if MIMO is implemented) in the spatial domain, an independent subcarrier (if OFDMA or FDMA is implemented) in the frequency domain, an independent channelization code (if CDMA is implemented) , Independent time slots in the time domain, or any combination thereof. Independent subcarriers may be distributed or converged. The channelization code is a physical resource that can be independently allocated to different TBs. In a CDMA system, different channelization codes may be allocated to transmit a number of TBs based on one TB or channel state and data rate requirement for each TB. The maximum number of TBs that can be transmitted is less than or equal to the maximum number of available channelization codes. If several independent spatial streams, subcarriers or channelization codes are available, several TBs may be transmitted simultaneously over different physical resources using several H-ARQ processes. For example, if two spatial streams are available in a 2x2 MIMO system, the two TBs may be transmitted over two spatial streams using two independent H-ARQ processes.

Different physical resources (i.e., different subcarriers, antenna spatial beams, channelization codes or time slots) may experience different channel qualities. The quality of each physical resource is determined by one or more CQI measurements. The CQI may be obtained from the communication terminal or based on the channel correlation. In addition, the CQI may be represented by an allocated MCS and / or a maximum transport block size.

The controller 106 identifies the available physical resources and the H-ARQ process associated with the available physical resources. Because each H-ARQ process 102a-102n is associated with a particular physical resource, if available physical resources are identified, the available H-ARQ process is also identified. The available physical resources and associated H-ARQ processes may be determined at the beginning of a common TTI boundary. Also, the combination may be semi-statically configured for a period of multiple TTIs.

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

In accordance with the present invention, multiple H-ARQ processes 102a-102n operate simultaneously in parallel. Because the H-ARQ processes 102a-102n can take different numbers of retransmissions for successful transmission, and the data flow mapped to the H-ARQ processes 102a-102n determines a different maximum retransmission count or a different TTI size Since H-ARQ processes may not be synchronized with each other, certain H-ARQs may not be available, as they may have QoS requirements. Any number of H-ARQ processes may be made available for any TTI. According to the present invention, more than one H-ARQ process and an associated set of physical resources are made available during a common TTI. The coupling between the H-ARQ process and the physical resources is coordinated by the controller 106.

The controller 106 routes the upper layer data flows 108a-108m (i.e., multiple flows of MAC or RLC PDUs) to at least two multiplexing and link adaptation processors 104a-104n and their associated H -ARQ processes 102a-102n. The same upper layer data flows 108a-108m may be mapped to more than one multiplexing and link adaptation processor 104a-104n and H-ARQ processes 102a-102n during a common TTI for QoS normalization. By mapping a set of the same higher layer data flow or higher layer data flow to the multiple H-ARQ processes, the QoS requirements across the H-ARQ processes 102a- 102n are consistent. In this case, each of the multiplexing and link adaptation processors 104a-104n may be configured to generate MCSs, such as MCSs, in accordance with the CQI of the associated physical resource set, such that the QoS obtained for each transmission of the higher layer data flow or set of data flows is as similar as possible. Transmission block size, transmit power, maximum H-ARQ transmission and retransmission parameters.

Alternatively, the upper layer data flows 108a-108m, which may be grouped according to QoS requirements, may be different H-ARQs 108a-108m based on the CQI and data flow QoS requirements associated with the set of physical resources allocated to each H- By mapping to processes 102a-102n, inequality error protection can also be achieved. For example, a CQI can view a set of physical resources as being better than another set of physical resources. Higher layer data flows with higher QoS requirements may be mapped to H-ARQ processes associated with better physical resources. The number of upper layer data flows to be mapped to a specific H-ARQ process is determined based on QoS requirements of the upper layer data flow, packet size, H-ARQ capacity, and the like. Once each upper layer data flow transmitted using a particular H-ARQ process is determined, these data flows are multiplexed through the multiplexing and link adaptation processors 104a-104n of the different H-ARQ processes.

Each multiplexing and link adaptation processor 104a-104n receives inputs (such as CQIs of allocated physical resources, buffer occupancy of the mapped data flow, etc.) and sends a higher layer data flow (mapped to each H- 108a-108m) to determine the physical transmission parameters and the H-ARQ configuration. Physical transmission parameters include transmit power, modulation and coding scheme, TTI size, transport block size and beamforming pattern, subcarrier allocation, MIMO antenna configuration, and the like. The H-ARQ configuration parameters include H-ARQ identity, maximum number of retransmissions, redundancy version (RV), CRC size, and so on. The multiplexing and link adaptation processors 104a-104n provide H-ARQ parameters to the associated H-ARQ processes 102a-102n.

The 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, regardless of the quality of the physical resources. Alternatively, the multiplexing and link adaptation processors 104a-104n may apply different MCSs, transport block sizes, TTI sizes, and / or transmit power to different physical resources based on channel conditions to maximize performance.

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

The multiplexing and link adaptation processor 104a-104n may determine the appropriate TFC for the TB based on the channel quality indicator and the physical transmission parameters (i.e., TB size, TB set size, TTI size, modulation and coding scheme (MCS) (E.g., power, antenna beam, subcarrier allocation, CRC size, redundancy version (RV) and data block mapping to radio resources, etc.). One or more higher layer data flows may be multiplexed into one TB. A separate CRC is attached to the TBs for separate error detection and H-ARQ processing, respectively. Each TB and associated transmission parameters are provided to the assigned H-ARQ processes 102a-102n. The TBs are then transmitted via the assigned H-ARQ processes 102a-102n, respectively.

Parameters that support multiple H-ARQ processes before transmission are signaled to the receiving peer, or blind detection techniques may be used for this receiving peer to decode the transmission parameters. The generated TBs along the associated transmission parameters are sent to the H-ARQ process 102a-102n for transmission.

2 is a flow diagram of a process 200 for simultaneously transmitting multiple TBs during a TTI using multiple H-ARQ processes in accordance with the present invention. The available physical resources and the channel quality of the physical resources associated with each H-ARQ process 102a-102n 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 of process 200 may be performed in a different order, and some of the steps may be performed in parallel. For example, step 204 may be applied before step 202 or may be applied at the same time.

The controller 106 may determine the type of the upper layer data flow based on the QoS parameters associated with the upper layer data flow for TFC selection processing. In addition, the controller 106 may determine the order in which the higher layer data flows are serviced. The processing order can be determined by QoS requirements or absolute priority. Alternatively, the lifetime time parameter may be used to determine the duration for which the upper layer data packet is persisted in the H-ARQ queue so that the controller 106 may prioritize or discard the upper layer data packet based on the lifetime parameter have.

The upper layer data flows 112a-112 are mapped by controller 106 to respective H-ARQ processes 102a-102n. ARQ processes 102a-102n, which are available to support the required QoS of the upper layer data flows 112a-112m mapped to each of the H-ARQ processes 102a-102n, (Step 206). When more than one H-ARQ process is available for transmission during the TTI, it is necessary to determine which upper layer data flow (112a-112m) should be mapped to a different H-ARQ process. The upper layer data flows 112a-112m may or may not have similar QoS requirements.

The QoS provided by the H-ARQ processes 102a-102n is normalized when all or a subset of the upper layer data flows 112a-112m that are mapped to different H-ARQ processes require similar QoS, The transmission parameters and H-ARQ configuration, such as TB size and transmit power, are adjusted for each TTI and the TFC is selected such that the QoS provided across the H-ARQ processes 102a-102n is similar. QoS normalization across multiple H-ARQ processes 102a-102n can be realized by adjusting link adaptation parameters (e.g., MCS, TB size, transmit power, etc.) across the H-ARQ processes 102a-102n have. For example, a higher MCS may be assigned to a physical resource with a better channel quality, and a lower MCS may be assigned to a physical resource with a worse channel quality. This allows data blocks to be multiplexed with different sizes in different H-ARQ processes.

Alternatively, if the upper layer data flows 112a-112m require different QoS, the upper layer data flows 112a-112m may have quality closely matching the QoS requirements of the upper layer data flows 112a-112m May be mapped to H-ARQ processes 102a-102n associated with physical resources. An advantage of using multiple H-ARQ processes is that it is flexible to multiplex logical channels or MAC flows that have different QoS requirements for different H-ARQ processes 102a-102n and associated physical resources. If a particular physical resource represents better channel quality than other resources, data with higher QoS is mapped to the H-ARQ process associated with that physical resource. This improves physical resource utilization and maximizes system throughput. Alternatively, or additionally, the MCS and / or the maximum number of retransmissions may be configured to distinguish QoS more closely matching the QoS requirements of a logical channel or MAC flow.

By multiplexing the upper layer data flows 112a-112m associated with each H-ARQ process 102a-102n after the upper layer data flows 112a-112m are mapped to the H-ARQ processes 102a-102n, The TB for each H-ARQ process 102a-102n is generated (step 208) in accordance with the physical transmission parameters and the H-ARQ configuration for each H-ARQ process 102a- 102n. The data multiplexing for each H-ARQ process 102a-102n may be processed sequentially or in parallel. The TBs may then be transmitted simultaneously through the associated H-ARQ processes 102a-102n (step 210).

The transmitted TBs may or may not be successfully received at the communication terminal. The bad TB is retransmitted during the subsequent TTI. Preferably, the size of the retransmitted TB remains the same for soft combining in the communication terminal. Several options are available for retransmission of bad TBs.

According to the first option, the physical resources allocated for the H-ARQ retransmission of the TB are not changed (i. E., The bad TB is retransmitted through the same physical resource and the H-ARQ process). The transmission parameters and the H-ARQ configuration (i.e., TFC) may be changed. In particular, link adaptation parameters (such as antenna selection, AMC, or transmit power) may be changed to maximize the chances of successful delivery of the retransmitted TB. When the link adaptation parameters are changed for retransmission of bad TB, the changed parameters can be signaled to the receiving terminal. Alternatively, a blind detection technique may be applied to the receiving terminal to eliminate the signaling overhead for the changed parameters.

According to the second option, the physical resources allocated for H-ARQ retransmission of the transport block may be dynamically re-allocated (i. E., The bad TB is retransmitted through different physical resources and the same H-ARQ process). The reallocation of physical resources may be based on CQI or based on known hopping patterns.

In another option, rogue H-ARQ transmissions may be fragmented across multiple H-ARQ processes, and each fragment may be transmitted independently to increase the successful H-ARQ transmission probability. According to this option, the physical resources of the retransmitted TB are newly allocated (i.e., the bad TB is transmitted via a different H-ARQ process). The H-ARQ process used to transmit the bad TB during the previous TTI becomes available for transmission of any other TB during the subsequent TTI. The maximum transmit power, the number of subcarriers and channelization codes, the number of antennas or the allocation of antennas and the recommended MCS may be reallocated for retransmission of bad TBs. Preferably, the newly allocated TFCS subset may be generated to reflect physical resource changes for the bad TB. The new parameters may be signaled to the receiving terminal to ensure successful reception. Alternatively, a blind detection technique may be applied to the receiving terminal to eliminate the signaling overhead for the changed parameters.

Examples

1. A method for transmitting multiple TBs during a TTI using multiple H-ARQ processes in a wireless communication system.

2. The method of embodiment 1, comprising identifying an available physical resource and an associated H-ARQ process.

3. The method as in any one of embodiments 1 or 2, comprising obtaining a channel quality measure for each of the available physical resources.

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

5. The method of embodiment 4, comprising determining a physical transmission parameter and an H-ARQ configuration to support a QoS requirement of an upper layer data flow mapped to each H-ARQ process.

6. The method of embodiment 5 comprising generating TBs from a mapped upper layer data flow according to the physical transmission parameters and H-ARQ configuration of each H-ARQ process.

7. The method of embodiment 6 comprising concurrently transmitting TBs via an H-ARQ process.

8. The method as in any of the embodiments 5-7, wherein the physical transmission parameters and the H-ARQ configuration comprise a TFC for each TB.

9. The method as in any of the embodiments 2-8, wherein the communication nodes comprise multiple antennas for MIMO and the available physical resources are identified based on independent spatial data streams.

10. The method as in any of the embodiments 2-9, wherein available physical resources are identified based on independent frequency subcarriers.

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

12. The method of embodiment 10 wherein the subcarriers are centralized subcarriers.

13. The method as in any of embodiments 2-12, wherein available physical resources are identified based on independent channelization codes.

14. The method as in any of the embodiments 2-13, wherein available physical resources are identified based on different time slots.

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

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

17. The method as in any one of embodiments 4-16, further comprising selecting an upper layer data flow to be transmitted during the next TTI, wherein only selected upper layer data flows are mapped to the H-ARQ process.

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

19. The method as in any of the embodiments 5-18, wherein if the QoS requirements of the upper layer data flow are similar, the physical transmission and H-ARQ configuration is determined such that the QoS across the available H-ARQ processes is similar.

20. The method of embodiment 19 wherein the higher order MCS is applied to the H-ARQ process with higher channel quality and the lower order MCS is applied to the H-ARQ process with lower channel quality.

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

22. The method as in any of the embodiments 5-18, wherein, if the QoS requirements of the upper layer data flow are not similar, each of the upper layer data flows is associated with a channel quality closely matching the QoS requirement of the upper layer data flow It is mapped to the H-ARQ process.

23. The method as in any of the embodiments 5-18, wherein, if the QoS requirements of the upper layer data flow are not similar, the maximum number of retransmissions is based on the QoS requirement of the upper layer data flow mapped to the H- ARQ process.

24. The method as in any of the embodiments 2-23, wherein the transmission of the TB fails, the physical resources mapped to the H-ARQ process for retransmission of the TB are unchanged.

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

26. The method of embodiment 24, wherein the TB is fragmented for retransmission.

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

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

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

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

31. The method as in any embodiments 5 to 30 wherein the physical transmission parameter comprises an MCS for each TB.

32. The method of embodiment 31, wherein the MCS for each TB is selected to distinguish the QoS requirements of the TBs.

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

34. The method as in any embodiments 5-33, wherein the physical transmission parameters include a transport block size for each TB.

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

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

37. An apparatus for simultaneously transmitting multiple TBs during a TTI using multiple H-ARQ processes in a wireless communication system.

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

39. The apparatus of embodiment 38 comprising: identifying an available physical resource and an H-ARQ process associated with the available physical resource; and based on the channel quality for each of the available physical resources and the QoS requirement of the upper layer data flow To determine at least one upper layer data flow to at least two H-ARQ processes and to configure physical transmission parameters and H-ARQ configuration to support the QoS requirements of the upper layer data flow mapped to each H-ARQ process Lt; / RTI >

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

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

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

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

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

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

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

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

48. The apparatus as in any of the embodiments 39-47, wherein the combination of physical resources and the H-ARQ process is determined dynamically.

49. The apparatus as in any of the embodiments 39-47, wherein the combination of physical resources and the H-ARQ process is semi-static.

50. The apparatus as in any of the embodiments 39-49, wherein the controller is configured to select at least one upper layer data flow to be transmitted during the next TTI and to map only selected upper layer data flows to the H-ARQ process.

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

52. The apparatus as in any of the embodiments 39-51, wherein if the QoS requirements of the upper layer data flow are similar, the controller determines the physical transmission and H-ARQ configuration to normalize the QoS across the available H-ARQ processes do.

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

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

55. The apparatus as in any one of embodiments 39-51, wherein if the QoS requirements of the upper layer data are not similar, then the controller is further configured to, in an H-ARQ process associated with channel quality closely matching the QoS requirements of the upper layer data, Map data.

56. The apparatus as in any one of embodiments 39-51, wherein if the QoS requirements of the upper layer data are not similar, then the controller is configured to determine a maximum value for the H-ARQ process based on QoS requirements of the upper layer data mapped to the H- Allocate a retransmission limit.

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

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

[0453] 59. The apparatus as in any of the embodiments 57-58, wherein the controller is fragmented for retransmission.

60. The apparatus as in any one of embodiments 39-56, wherein when the transmission of the TB fails, the controller changes physical resources for retransmission of the TB.

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

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

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

64. The apparatus as in any one of embodiments 39-63, wherein the physical transmission parameter comprises an MCS for each TB.

65. The apparatus of embodiment 64 wherein the MCS for each TB is selected to distinguish the QoS requirements of the TBs.

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

[0156] [00124] 67. The apparatus as in any of the embodiments 39-66, wherein the physical transmission parameters include a transport block size for each TB.

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

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

Although the features and elements of the present invention are described in the preferred embodiment in specific combinations, each feature or element may be used alone, without the other features and elements of the preferred embodiment, or other features and elements of the present invention And may be used in various combinations. The methods and flow charts provided herein may be implemented as a computer program, software, or firmware that is embodied on a computer readable storage medium for execution by a general purpose computer or processor. Examples of computer-readable storage media include magnetic media such as read only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, internal hard disks or removable disks, magneto- ROM disk and an optical medium such as a digital versatile disk (DVD).

Suitable processors include, for example, one or more microprocessors in conjunction with a general purpose processor, a special purpose processor, a general purpose processor, a digital signal processor (DSP), a plurality of microprocessors, a DSP core, a controller, a microcontroller, ), A field programmable gate array (FPGA) circuit, any other type of integrated circuit (IC), and / or a state machine.

The processor associated with the software may be used to implement a radio frequency transceiver for use in a wireless transmit / receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC) or any host computer. The WTRU may be any of a variety of types, including cameras, video camera modules, video phones, speaker phones, vibrating devices, speakers, microphones, May be used with modules implemented in hardware and / or software, such as light emitting diode (OLED) display units, digital music players, media players, video game player modules, Internet browsers and / or wireless local area network (WLAN) modules.

Claims (18)

A wireless transmit receive unit (WTRU) configured to receive multiple TBs (transport blocks) within a transmission time interval (TTI)
A transmitter for sending a CQI feedback message comprising a channel quality indicator (CQI) for each of a plurality of sets of subcarriers;
A receiver for receiving an allocation of radio resources comprising at least two sets of physical resources, each set of physical resources comprising an associated hybrid automatic repeat request (H-ARQ) process information, modulation and coding scheme (MCS) And a coding scheme), a transport block size, and a redundancy version;
A processor for generating a plurality of transport blocks (TBs) from a higher layer data flow,
The transmitter is also configured to transmit the plurality of TBs in a TTI using the allocation of radio resources,
The receiver is also configured to receive an indication that a TB of one of the TBs has not been received,
Wherein the transmitter is also configured to retransmit the one TB of the TBs that was not received. The method according to claim 1,
Each CQI representing an allowed MCS. The method according to claim 1,
Wherein each set of physical resources is for a different MIMO stream. The method according to claim 1,
Wherein each set of physical resources is for a different set of subcarriers. The method according to claim 1,
Each TB having an associated cyclic redundancy check (CRC). The method according to claim 1,
Wherein the allocation of the radio resources is based on the CQI feedback message. A method for receiving multiple transport blocks (TBs) within a TTI (Transmission Time Interval)
Sending a CQI feedback message comprising a channel quality indicator (CQI) for each of a plurality of sets of subcarriers;
Comprising: receiving an allocation of radio resources comprising at least two sets of physical resources, wherein each set of physical resources comprises an associated hybrid automatic repeat request (H-ARQ) process information, a modulation and coding scheme (MCS) Encoding scheme), a transport block size, and a redundancy version;
Comprising: generating a plurality of transport blocks (TBs) from a higher layer data flow;
Transmitting the plurality of TBs in a TTI using the allocation of radio resources;
Receiving an indication that one of the TBs has not been received; And
And retransmitting the one TB not received among the TBs. 8. The method of claim 7,
Each CQI representing an allowed MCS. 8. The method of claim 7,
Wherein each set of physical resources is for a different MIMO stream. 8. The method of claim 7,
Wherein each set of physical resources is for a different set of subcarriers. 8. The method of claim 7,
Each TB having an associated cyclic redundancy check (CRC). 8. The method of claim 7,
Wherein the allocation of radio resources is based on the CQI feedback message. In an evolved Node B,
A receiver configured to receive a CQI (channel quality indicator) feedback message for each of a plurality of sets of subcarriers;
A transmitter configured to transmit an allocation of radio resources comprising at least two sets of physical resources, each set of physical resources comprising an associated hybrid automatic repeat request (H-ARQ) process information, a modulation and coding scheme (MCS) Modulation and coding scheme), a transport block size, and a redundancy version,
The receiver is also configured to receive a plurality of transport blocks (TBs) generated from a higher layer data flow in a transmission time interval (TTI) using the allocation of radio resources,
The transmitter is also configured to transmit an indication that a TB of one of the TBs has not been received,
Wherein the receiver is also configured to receive the one TB of the TBs not received. 14. The method of claim 13,
Each CQI represents an allowed MCS. 14. The method of claim 13,
Wherein each set of physical resources is for a different MIMO stream. 14. The method of claim 13,
Wherein each set of physical resources is for a different set of subcarriers. 14. The method of claim 13,
Each TB having an associated cyclic redundancy check (CRC). 14. The method of claim 13,
Wherein the allocation of the radio resources is based on the CQI feedback message.

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