Wireless communication method and related equipment

Abstract

The invention provides a wireless communication method and related equipment. The method is performed by a user equipment (UE), comprising receiving a single downlink control information (DCI) to schedule a plurality of physical downlink shared channels (PDSCHs), the DCI configuring one or more physical uplink control channel (PUCCH) resources or one or more PDSCHs to a hybrid automatic repeat request (HARQ) feedback timing. By using the method, the data traffic delay of the XR traffic can be reduced.

Description

Technical Field

[0001] The present invention relates to wireless communication technology, and more specifically, to a wireless communication method and related equipment, such as a user equipment (UE) and a base station (BS), such as a gNB. Background Art

[0002] The wireless communication system of the third generation (3G) mobile phone standards and technologies is well known. Such 3G standards and technologies are developed by the Third Generation Partnership Project (3GPP). The third generation of wireless communication is developed to support macrocellular mobile phone communications, so that communication systems and networks are moving towards broadband and mobile systems. In a cellular wireless communication system, a user equipment (UE) is connected to a radio access network (RAN) via a wireless link. The RAN includes a group of base stations (BS) and an interface to the core network (CN), the former providing a wireless link with the UE in the base station coverage area, and the latter providing overall network control. The RAN and CN each perform their respective functions related to the entire network.

[0003] The 3rd Generation Partnership Project developed the Long-Term Evolution (LTE) system, the Evolved Universal Mobile Telecommunications System Radio Access Network (E-UTRAN), for mobile access networks, where one or more macro base stations are supported by base stations called eNodeB or eNB (evolved NodeB). LTE is further evolving towards the so-called 5G or New Radio (NR) system, where one or more cells are supported by base stations called Next Generation NodeB base stations (gNB).

[0004] The 5G wireless communication system is designed to provide enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC) and massive machine type communication (mMTC) services.

[0005] Extended Reality (XR) and cloud gaming services are important media applications supported by 5G. XR is a general term for different types of reality, referring to all real and virtual combined environments and human-computer interactions generated by computer technology and wearable devices. It includes representative forms such as Augmented Reality (AR), Mixed Reality (MR) and Virtual Reality (VR), as well as the areas inserted between them. A new research project description (SID) on XR evaluation has been approved, and the characteristics and challenges of XR traffic are summarized as follows:

[0006] High data rates with limited latency

[0007] For high-resolution 3D VR videos based on different frame rates, color codecs, bit depths, compression rates, etc., the transmission data rate can reach up to 60Mbps and above, with only a limited delay of about 10 to 30ms.

[0008] Non-integer cycles with jitter

[0009] The benchmark for downlink (DL) and uplink (UL) video streams has been determined to be 60 frames per second (fps), and 30fps, 90fps, and 120fps can be optionally evaluated. According to the formula for packet arrival time, the corresponding period is {33.33ms, 16.67ms, 11.11ms, 8.33ms}. In addition, XR traffic arrival also has jitter characteristics. According to the RAN1 protocol, the jitter of the traffic is modeled using a truncated Gaussian distribution, and its jitter range varies from [-4,4]ms (baseline) or [-5,5]ms (optional).

[0010] Multiple Streams

[0011] For XR applications, there may be multiple data flows. Section 5.1.2 of TR 38.838 provides three multi-flow models suitable for XRDL traffic, including slice-based traffic, Group of Pictures (GOP)-based traffic, etc. Section 5.5.2 of TR 38.838 also provides three different AR UL traffic multi-flows. Multiple flows may have different traffic characteristics, QoS requirements, and priorities. RAN can benefit from information related to multiple flows for efficient radio resource management.

[0012] Different frame sizes

[0013] In the field of video compression, three main frame types are defined by three different video algorithms, which have the following characteristics:

[0014] -I frames are the least compressible and can be decoded independently

[0015] -P frames can use the previous frame for decompression and are more compressible than I frames.

[0016] -B frames can use the previous and forward frames to get the highest amount of data compression.

[0017] Issues arising from the incorporation of XR services into cellular wireless communications need to be addressed, especially the transmission of XR services in NR. Technical Solution

[0018] The purpose of this application is to provide a wireless communication method and related equipment for being compatible with XR traffic and / or reducing the latency of data traffic such as XR traffic.

[0019] In a first aspect, an embodiment of the present application provides a wireless communication method performed by a user equipment (UE) in a network, the method comprising: receiving a single downlink control information DCI to schedule multiple physical downlink shared channels PDSCH, the DCI configuring one or more physical uplink control channel PUCCH resources or one or more PDSCH to hybrid automatic repeat request HARQ feedback timing.

[0020] In a second aspect, an embodiment of the present application provides a wireless communication method performed by a user equipment (UE) in a network, the method comprising: being configured with at least one configuration authorization CG / semi-persistent scheduling SPS configuration mode, the configuration mode comprising a CG / SPS configuration matching a traffic arrival period; and receiving downlink control information DCI, the DCI being used to activate or deactivate one or more CG / SPS configuration modes.

[0021] In a third aspect, an embodiment of the present application provides a wireless communication method performed by a user equipment (UE) in a network, the method comprising: being configured with at least one search space mode, the search space mode comprising a search space set matching a traffic arrival period.

[0022] In a fourth aspect, an embodiment of the present application provides a wireless communication method performed by a base station (BS) in a network, the method comprising: transmitting a single downlink control information DCI to a user equipment UE to schedule multiple physical downlink shared channels PDSCH, the DCI configuring one or more physical uplink control channel PUCCH resources or one or more PDSCH to hybrid automatic repeat request HARQ feedback timing.

[0023] In a fifth aspect, an embodiment of the present application provides a wireless communication method, which is performed by a base station (BS) in a network, and the method includes: configuring a user equipment UE with at least one configuration authorization CG / semi-persistent scheduling SPS configuration mode, wherein the configuration mode includes a CG / SPS configuration that matches a traffic arrival period; and transmitting downlink control information DCI to the UE, wherein the DCI is used to activate or deactivate one or more CG / SPS configuration modes.

[0024] In a sixth aspect, an embodiment of the present application provides a wireless communication method, which is performed by a base station (BS) in a network, and the method includes: configuring at least one search space mode of a user equipment UE, and the search space mode includes a search space set that matches a traffic arrival period.

[0025] In a seventh aspect, an embodiment of the present application provides a UE, comprising a processor, wherein the processor is configured to call and run program instructions stored in a memory to execute the method of any one of the first, second or third aspects.

[0026] In an eighth aspect, an embodiment of the present application provides a BS, comprising a processor configured to call and run program instructions stored in a memory to execute the method of any one of the fourth, fifth or sixth aspects.

[0027] In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program, enabling a computer to execute the method of any one of the first to sixth aspects.

[0028] In a tenth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions that enable a computer to execute the method of any one of the first to sixth aspects.

[0029] In the eleventh aspect, an embodiment of the present application provides a computer program, which, when running on a computer, enables the computer to execute any one of the methods in the first to sixth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A block diagram of a communication network system according to an embodiment of the present invention is shown.

[0032] Figure 2 A schematic diagram showing the mismatch between DRX and XR traffic with jitter.

[0033] Figure 3 A schematic diagram of an embodiment of the present application is shown, illustrating the relationship between a plurality of PUCCH resources and a plurality of PDSCH corresponding HARQ feedback timings.

[0034] Figure 4 A schematic diagram of a single DCI for repeatedly scheduling multiple PDSCHs according to an embodiment of the present application is shown.

[0035] Figure 5 A flow chart of a wireless communication method according to a second embodiment of the present application is shown.

[0036] Figure 6 A schematic diagram is shown of an SPS transmission mode configured within a period of time according to an embodiment of the present application.

[0037] Figure 7 Schematic diagram showing the search space and the distance between XR traffic arrivals.

[0038] Figure 8 A flow chart of a wireless communication method according to a third embodiment of the present application is shown.

[0039] Fig. 9 A schematic diagram is shown of a search space mode configured within a period of time according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present invention describe technical matters, structural features, implementation purposes and effects in detail with reference to the accompanying drawings. Specifically, the terms in the embodiments of the present invention are only used for the purpose of describing specific embodiments, rather than limiting the disclosure.

[0041] There are the following issues with traffic flows, such as XR traffic transmission.

[0042] For high-resolution 3D VR videos based on different frame rates, color codecs, bit depths, compression rates, etc., the transmission data rate can be up to 60Mbps and above, with only a limited delay of about 10 to 30ms. Taking 60Mbps AR / VR as an example, the average packet size is 125,000 bytes. To transmit such a large transport block, multiple time slots need to be used in the time domain. In order to reduce the overhead of DCI signaling, a single DCI schedules multiple PDSCH / PUSCH for XR. Accordingly, some enhancements are needed to match XR services.

[0043] The benchmark for downlink (DL) and uplink (UL) video streams is currently set at 60 frames per second (fps), with the option to evaluate 30fps, 90fps, and 120fps. Based on the formula for packet arrival time, the corresponding periods are {33.33ms, 16.67ms, 11.11ms, 8.33ms}. In the current 3GPP specification, the supported SPS periods are {10ms, 20ms, 32ms, ..., 640ms}, {1ms, 2ms, ..., 640ms} (15kHz), 0.5x{1ms, 2ms, ..., 1280ms} (30kHz), 0.25x{1ms, 2ms, ...., 2560ms} (60kHz) and 0.125x{1ms, 2ms, ...., 5120ms} (120kHz) and the supported configuration authorization periods are {1 / 7ms, 0.5ms, 1ms, ..., 320ms, 640ms} (15kHz), 0.5x{1 / 7ms, 0.5ms, 1ms, ..., 1280ms} (30kHz), 0.25x{1 / 7ms, 0.5ms, 1ms, ..., 2560ms} for 60kHz. However, the XR / CG period does not match the SPS / CG period, so you need to consider configuring the CG / SPS transmission mode. When configuring the CG / SPS transmission mode, you can also decide how to configure and activate a mode with lower signal overhead.

[0044] The benchmark for downlink (DL) and uplink (UL) video streams has been determined to be 60 frames per second (fps), and 30fps, 90fps, and 120fps can be optionally evaluated. According to the formula for packet arrival time, the corresponding period is {33.33ms, 16.67ms, 11.11ms, 8.33ms}. In addition, XR traffic arrival also has jitter characteristics. According to the RAN1 protocol of R-17, a truncated Gaussian distribution is used to model the jitter of the traffic, and its jitter range varies from [-4,4]ms (baseline) or [-5,5]ms (optional). However, the period of the search space does not match the XR service. Therefore, some enhancement methods should be studied to solve this problem.

[0045] The present invention can be summarized as follows:

[0046] 1. In order to reduce the overhead of downlink control information (DCI) signaling, XR can use a single DCI to schedule multiple physical downlink shared channels (Physical Downlink ShareChannel, PDSCH / Physical Uplink Share Channel (PUSCH). Accordingly, some enhancements are required to match XR services. Method 1: For multiple PDSCHs scheduled by a single DCI, multiple physical uplink control channel (PUCCH) resources and / or multiple PDSCH-to-HARQ feedback (PDSCH-to-HARQ_feedback) timings may be configured. Method 2: For multiple PDSCHs scheduled by a single DCI, multiple PUCCH resources and / or a single PDSCH-to-HARQ feedback timing may be configured. Method 3: For multiple PDSCHs scheduled by a single DCI, a single PUCCH resource and / or multiple PDSCH to HARQ feedback timings may be configured. In addition, a method is proposed to reuse a single DCI to schedule multiple PDSCH / PUSCHs, and a reuse pattern is given accordingly.

[0047] 2. Consider providing configured grant (CG) / semi-persistent scheduling (SPS) transmission mode for XR services. When configuring CG / SPS transmission mode, consider how to configure the mode and activate the mode. In addition, multiple CG / SPS transmission modes for multiple traffic flows can be configured to the UE. For configuration: Method 1: For CG Type 1, CG Type 2, and SPS, an index and period are introduced for the CG configuration mode. Method 2: For CG Type 1, CG Type 2, and SPS, an index and period are introduced for the CG configuration mode. All parameters of the CG can be shared, except for the time starting point of each CG / SPS configuration in the mode. For activation: Method 1: Use cs-RNTI or a new Radio Network Temporary Identity (RNTI) to scramble DCI to activate / deactivate SPS / CG configuration mode. DCI includes a mode index. Method 2: Use cs-RNTI or new RNTI to scramble DCI to activate / deactivate a set of SPS / CG configuration modes.

[0048] 3. Solve the jitter problem and mismatch between the search space period and the arrival of XR traffic. Method 1: Configure the search space mode within a period of time. Method 2: Dynamically change the search space parameters through signaling.

[0049] Figure 1 A communication network system 30 for an embodiment of the present invention is illustrated. In some embodiments, the communication network system 30 is used to provide wireless communication, which includes one or more user equipments (UEs) 10 and a base station (e.g., gNB or eNB) 20. One or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the proposed functions, processes, and / or methods described in this description. The layers of the radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 works with the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 works with the processor 11 or 21, and the transceiver 13 or 23 sends and / or receives radio signals.

[0050] The processor 11 or 21 may include an application specific integrated circuit (ASIC), other chipsets, logic circuits and / or data processing devices. The memory 12 or 22 may include a read-only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium and / or other storage devices. The transceiver 13 or 23 may include a baseband circuit for processing radio frequency signals. When the embodiment of the present invention is implemented in software, the technology described in the present invention may be implemented by executing the functional modules (e.g., procedures, functions, etc.) described in the present invention. The modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be integrated inside the processor 11 or 21, or may be implemented outside the processor 11 or 21, in which case they may be communicatively coupled with the processor 11 or 21 in various ways known in the art.

[0051] In order to provide a good XR experience, the latency of XR traffic should be reduced as much as possible. According to the decision of the RAN1 meeting of Rel-17, the air interface packet delay budget (PDB) or DL ​​video stream is as follows: 10 milliseconds for VR / AR and 15 milliseconds for CG.

[0052] According to the traffic model agreed in Rel-17, the average packet size is very large. Taking AR / VR 60Mbps as an example, the average packet size is 125,000 bytes. This is very different from URLLC or eMBB services. One of the biggest challenges for URLLC is latency, while one of the biggest challenges for eMBB is high transmission data. However, for XR services, both high transmission rate and low latency should be met. For CG / SPS, to transmit such a large transport block (TransportBlock, TB), the transmission opportunity will be limited, resulting in a delay exceeding the XR service. For DL / UL transmission of dynamic grant (DynamicGrant, DG), since TB can only occupy time slots / mini-time slots (disabling repeated transmission of TB), it will result in more DCI overhead. Therefore, occupying multiple time slots for TB in the time domain is one of the potential solutions to the problem. In addition, in Rel-15 / 16 / 17, the use of a single DCI to schedule multiple PDSCHs and PUSCHs is supported, and it can also be used for XR. In the current 3GPP specification, multiple PDSCHs scheduled by a single DCI can be shared by the same PUCCH resource. However, this will result in a large delay, so some enhanced methods need to be considered.

[0053] Figure 2 is a flow chart of the wireless communication method of the first embodiment of the present application. Figure 1 as well as Figure 2 , the method 100 includes the following contents. In step 110, the UE 10 receives a single downlink control information (DCI) from the base station 20 to schedule multiple physical downlink shared channels (PDSCH), the DCI configuring one or more physical uplink control channel (PUCCH) resources or one or more PDSCH to hybrid automatic repeat request (HARQ) feedback (PDSCH-to-HARQ_feedback) timing. Using this method, the delay of data traffic such as XR traffic can be reduced.

[0054] In a first possible embodiment, for multiple PDSCHs scheduled by a single DCI, multiple PUCCH resources and / or multiple PDSCH to HARQ feedback timings may be configured. If the number of schedulable PDSCHs indicated by the time domain resource allocation field of the DCI is greater than 1, multiple PUCCH resources may be configured to the UE for PDSCH to HARQ feedback. A simple way to indicate PUCCH resources is to add a new field in the DCI. For example, when the gNB wants to indicate 3 PUCCH resources to the UE, an additional 6 bits are added to the DCI (a total of 9 bits are used to indicate PUCCH resources, and every 3 bits in the DCI can indicate one PUCCH resource). Another way is that each state in the PUCCH resource indication field of the DCI (for example, 3 bits can indicate a total of 8 different states) can represent a group of PUCCH resources, which is semi-statically configured by RRC, where the number of PUCCH resources in the group of PUCCH resources can be one or more, and the group of PUCCH resources can be configured by RRC. A similar method can be used for the PDSCH to HARQ feedback timing indicator. The number of PDSCH to HARQ feedback timings (that is, a set of PDSCH to HARQ feedback timings) is equal to the number of PUCCH resources. When the DCI indicates a set of PUCCH resources and PDSCH to HARQ feedback timings at the same time, the PUCCH resources in the PUCCH resource set (that is, a set of PUCCH resources) and the values ​​in the PDSCH to HARQ feedback timing set are determined by the PUCCH (including resources and time positions). Each value in the PUCCH resource set can have a corresponding PDSCH to HARQ feedback time value in the PDSCH to HARQ feedback timing set. For example, the timeline of the first PUCCH resource is the first value in the PDSCH to HARQ feedback timing set, the timeline of the second PUCCH resource is the second value in the PDSCH to HARQ feedback timing set, and so on. For example, if Figure 3 As shown, a single DCI schedules multiple PDSCHs and indicates a group of PUCCH resources (PUCCH1, PUCCH2) and a group of PDSCH to HARQ feedback timing (T1, T2), then the time position of PUCCH 1 is RP+T1, and the time position of PUCCH 2 is RP+T2, where RP is a reference time point, and the reference time point RP can be determined based on the scheduling DCI or the first schedulable PDSCH or the last schedulable PDSCH or any one of the schedulable PDSCHs. The time unit of the reference time point RP and the PDSCH to HARQ feedback timing can be a time slot.

[0055] In some embodiments, the predetermined multiple schedulable PDSCHs may be divided into several groups, each group of PDSCHs corresponding to a PUCCH for PDSCH to HARQ feedback. The group of PDSCH information may be predefined, or may be based on the size of the PUCCH resource set or the size of the PDSCH to HARQ feedback timing set, or may be explicitly indicated.

[0056] In a second possible embodiment, multiple PUCCH resources and / or a single PDSCH to HARQ feedback timing may be configured for multiple PDSCHs scheduled by a single DCI. If the number of schedulable PDSCHs indicated by the time domain resource allocation field is greater than 1, multiple PUCCH resources may be configured to the UE for PDSCH to HARQ feedback. A similar method to that used in the above method to indicate a set of PUCCH resources may be applied here. In this case, each PUCCH resource in the set has the same PDSCH to HARQ feedback timing value and a different reference time point. The method for determining the reference time point is based on the corresponding PDSCH, such as the position of the PDSCH time slot.

[0057] In some embodiments, the predetermined multiple schedulable PDSCHs may be divided into several groups, each group of PDSCHs corresponding to a PUCCH for PDSCH to HARQ feedback. The group of PDSCH information may be predefined, or may be based on the size of the PUCCH resource set or the size of the PDSCH to HARQ feedback timing set, or may be explicitly indicated.

[0058] In a third possible implementation, a single PUCCH resource and / or multiple PDSCH to HARQ feedback timings may be configured for multiple PDSCHs scheduled by a single DCI. If the number of schedulable PDSCHs indicated by the time domain resource allocation field is greater than 1, multiple PUCCH resources may be configured to the UE for PDSCH to HARQ feedback. Similar methods as described above for indicating a PDSCH to HARQ feedback timing set may be applied here. In this case, each PUCCH resource has a different PDSCH to HARQ feedback timing value, and the reference time point may be the same or different. The reference time point is determined based on the corresponding PDSCH (e.g., the position of the PDSCH timeslot) or the scheduled DCI (e.g., the position of the scheduled DCI).

[0059] In some embodiments, multiple schedulable PDSCHs may be divided into several groups, each group of PDSCHs corresponding to a PUCCH for PDSCH to HARQ feedback. The group of PDSCH information may be predefined, based on the size of the PUCCH resource set or the size of the PDSCH to HARQ feedback timing set, or may be explicitly indicated.

[0060] In addition, when channel conditions deteriorate, one-shot or non-repeated transmission may not achieve good reliability, so repetition is a simple method. When using multiple PDSCHs and PUSCHs that are repeated by a single DCI, how to determine the transmission mode, whether to transmit TB first or repeatedly transmit TB. In order to reduce the latency of XR traffic, multiple TBs can be transmitted first. Figure 4 As shown, the initial PDSCH is transmitted first, and then the PDSCH is repeated. A similar method can be used to schedule multiple PUSCHs with a single DCI.

[0061] In some embodiments, when a single DCI is enabled to schedule multiple PDSCHs with repetitions, two PUCCHs can be configured, one PUCCH used to feedback the HARQ of the initial PDSCH transmission. The second PUCCH is then used to feedback the HARQ of the PDSCH transmission repetition. The time reference point of the first PUCCH is based on the first PDSCH in the scheduled DCI or multiple initial PDSCH transmissions, or the last PDSCH in multiple initial PDSCH transmissions, or any PDSCH in multiple initial PDSCH transmissions. The time reference point of the second PUCCH is based on the first PDSCH or the last PDSCH or any PDSCH within the scheduled DCI or PDSCH repetition. The time reference point based on DCI or PDSCH means that the time reference point is the time slot (index) of the DCI or PDSCH.

[0062] The benchmark for downlink (DL) and uplink (UL) video streams is currently set at 60 frames per second (fps), with the option to evaluate 30fps, 90fps, and 120fps. Based on the formula for packet arrival time, the corresponding periods are {33.33ms, 16.67ms, 11.11ms, 8.33ms}. In the current 3GPP specification, the supported SPS periods are {10ms, 20ms, 32ms, ..., 640ms}, {1ms, 2ms, ..., 640ms} (15kHz), 0.5x{1ms, 2ms, ..., 1280ms} (30kHz), 0.25x{1ms, 2ms, ...., 2560ms} (60kHz) and 0.125x{1ms, 2ms, ...., 5120ms} (120kHz) and the supported configuration authorization periods are {1 / 7ms, 0.5ms, 1ms, ..., 320ms, 640ms} (15kHz), 0.5x{1 / 7ms, 0.5ms, 1ms, ..., 1280ms} (30kHz), 0.25x{1 / 7ms, 0.5ms, 1ms, ..., 2560ms} for 60kHz. However, the period of XR / CG does not match the period of SPS / CG.

[0063] Figure 5 is a flow chart of a wireless communication method according to a second embodiment of the present application. Figure 5 , method 200 includes the following contents. In step 210, UE 10 is configured by base station 20 with at least a configuration grant (CG) / semi-persistent scheduling (SPS) configuration mode, which includes a CG / SPS configuration matching a traffic arrival period. In step 220, UE 10 receives a DCI from base station 20, which activates or deactivates a CG / SPS configuration mode or multiple CG / SPS configuration modes. Using this method, compatibility with specific services such as XR services can be achieved.

[0064] In some embodiments, the periodicity of the CG / SPS transmission mode is related to the XR traffic arrival period. You can consider configuring the CG / SPS transmission mode. When configuring the CG / SPS transmission mode, for example Figure 6 As shown, the time interval between two SPS opportunities in the mode may be the same or different. It is possible to consider how to configure the mode and activate the mode. In addition, the UE can also configure multiple CG / SPS transmission modes for multiple traffic flows.

[0065] In a first possible embodiment, for CG type 1, an index and period of a CG configuration mode are introduced, and all parameters of the CG can be shared, except for at least one of the following RRC parameters:

[0066] mcs-table (indicates the MCS table used by the UE for PUSCH, without switching precoding)

[0067] mcs-TableTransformPrecoder (indicates the MCS table that the UE should use for PUSCH with transform precoding)

[0068] uci-OnPUSCH (dynamic and semi-static beta offset selection and configuration)

[0069] harq-ProcID-offset (indicates the offset used to obtain the HARQ process ID)

[0070] mcsAndTBS (modulation order, target bit rate and TB size)

[0071] repK (number of repetitions K)

[0072] timeDomainAllocation (indicates the combination of the starting symbol and length and the PUSCH image type)

[0073] repK-RV (Redundancy Version (RV) sequence to be used).

[0074] For CG type 2, the index and period of the CG configuration mode are introduced, and all parameters of the CG can be shared, except for at least one of the following RRC parameters:

[0075] mcs-table (indicates the MCS table used by the UE for PUSCH, without switching precoding)

[0076] mcs-TableTransformPrecoder (indicates the MCS table that the UE should use for PUSCH with transform precoding)

[0077] uci-OnPUSCH (dynamic and semi-static beta offset selection and configuration)

[0078] harq-ProcID-offset (indicates the offset used to obtain the HARQ process ID)

[0079] mcsAndTBS (modulation order, target bit rate and TB size)

[0080] repK (number of repetitions K)

[0081] repK-RV (redundancy version sequence to use).

[0082] For SPS, the index and period of SPS configuration mode are introduced, and all parameters of SPS can be shared, except for at least one of the following parameters:

[0083] n1PUCCH-AN (HARQ resources of PUCCH for DL ​​SPS)

[0084] harq-ProcID-offset (indicates the offset used to obtain the HARQ process ID)

[0085] pdsch-AggregationFactor (number of repetitions of SPS PDSCH)

[0086] mcs-table (indicates the MCS table that the UE should use for DL ​​SPS)

[0087] In some embodiments, a set of repK, timeDomainAllocation, repK-RV can be configured. Except for the first CG configuration in the mode, the HARQ-ID of the remaining CG configurations can be determined based on the HARQ-ID of the first CG configuration. In some embodiments, the start of each CG / SPS configuration in the set can be changed dynamically. In some embodiments, the priority of the CG / SPS configuration is related to the XR traffic arrival period.

[0088] In a second possible implementation, for CG type 1, CG type 2 and SPS, the index and period of the CG / SPS configuration mode are introduced, and all parameters of the CG / SPS can be shared except the time starting point of each CG / SPS configuration in the mode. The time starting point of each CG / SPS configuration can be semi-statically configured by RRC. In some embodiments, the time starting point of each CG / SPS configuration can be dynamically indicated by DCI.

[0089] In the current 3GPP specification, activating DCI can only activate CG / SPS configuration at the same time. When configuring mode, there will be multiple SPS / CG configurations, so activating CG / SPS configurations using the current mechanism will result in large signaling overhead. In addition, for XR applications, there may be multiple data streams, so it is also possible to consider how to activate multiple configurations for multiple data streams with lower signaling overhead.

[0090] In a first alternative embodiment, the SPS / CG configuration mode is activated / deactivated using cs-RNTI or a new RNTI scrambled DCI, and the DCI includes a mode index. In some embodiments, the mode index can be represented by a HARQ processing field. When the UE receives an activation / deactivation DCI indicating SPS / CG configuration mode index 1, all SPS / CG configurations in SPS / CG configuration index 1 will be activated or deactivated. In some embodiments, RRC signaling can be introduced to activate or deactivate the activation or deactivation of the SPS / CG configuration mode.

[0091] In a second alternative embodiment, cs-RNTI or a new RNTI scrambled DCI is used to activate / deactivate a set of SPS / CG configuration modes, where the SPS / CG configuration mode set can be configured by RRC, for example, an SPS / CG configuration mode list. As shown in Table 1, the index in the table can contain one or more CG / SPS configuration modes. After configuring the SPS / CG configuration mode list, the DCI can activate or deactivate multiple SPS / CG configuration modes at the same time. In some embodiments, the index of the mode list can be represented by a HARQ processing field. Table 1: SPS / CG configuration mode list index CG / SPS Configuration Mode List 1 1,2 2 1,2,3,4 3 7,8,9,10 … … N 5,6

[0092] In some embodiments, RRC signaling may be introduced to enable or disable activation or deactivation of multiple SPS / CG configuration modes.

[0093] The benchmark for downlink (DL) and uplink (UL) video streams is currently set at 60 frames per second (fps), with the option to evaluate 30fps, 90fps, and 120fps. According to the formula for packet arrival time, the corresponding periods are {33.33ms, 16.67ms, 11.11ms, 8.33ms}. However, in the current 3GPP specification, the monitoring period of the search space corresponds to an integer number of time slots, so there is a gap between the search space period and the arrival of XR traffic. For example, Figure 7 As shown, taking 60fps (60 frames per second) as an example, there is a gap between XR traffic and search space periodicity. In addition, XR traffic arrival also has jitter characteristics. According to the RAN1 protocol in Rel-17, jitter can be modeled as a truncated Gaussian distribution with a range of [-4, 4] ms (baseline) or [-5, 5] ms (optional). Therefore, in order to solve the jitter and mismatch between search space periodicity and XR traffic arrival, some enhanced methods should be studied.

[0094] Figure 8 is a flow chart of a wireless communication method according to a third embodiment of the present application. Figure 8 and Figure 1 , the method 300 includes the following contents. In step 310, the UE 10 is configured by the base station 20 with at least one search space pattern, the search space pattern including a set of search spaces matching the traffic arrival period. Using this method, it is possible to be compatible with a certain service, such as the ass XR service.

[0095] In a first possible embodiment, a search space pattern may be configured over a period of time. The pattern includes a group of search spaces, and the search spaces may be associated with the same control resource set (CORESET), such as Fig. 9 shown.

[0096] In some embodiments, a set of search space patterns may be configured, and a DCI or MAC CE may indicate one of the search space patterns in the set. If no DCI or MAC CE indicates one of the search space patterns, a default search space pattern will be used, where the default search space pattern is predefined. In some embodiments, the time interval between two search spaces within a pattern may be the same or different.

[0097] In a second possible implementation, signaling can be used to dynamically change the parameters of the search space. The signal can be a MAC CE or DCI, or a piggyback DCI or piggyback UCI. The parameters include at least one of the following:

[0098] -monitoringSlotPeriodicityAndOffset (PDCCH monitoring slot is configured as period and offset)

[0099] -duration (the number of consecutive time slots that the SearchSpace lasts in each case)

[0100] -monitoringSymbolsWithinSlot (the first symbol used for PDCCH monitoring in the slot configured for (multi-slot) PDCCH monitoring)

[0101] The commercial benefits of some embodiments are as follows. 1. Solve problems in the prior art 2. Promote XR traffic services. 3. Improve latency. 4. Improve power saving effect of XR. 5. Enhance PDCCH adaptability 6. Provide good communication performance. Some embodiments of the present invention are used by 5G-NR chipset suppliers, V2X communication system development suppliers, automobile manufacturers (including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc.), drones, smartphone manufacturers, public safety communication equipment, AR / VR equipment manufacturers for games, conferences / seminars, and educational purposes. Some embodiments of the present invention are a combination of "technology / processes" that can be adopted in 3GPP specifications to create a final product. Some embodiments of the present invention can be used in 5G NR unlicensed band communications. Some embodiments of the present invention propose technical mechanisms.

[0102] The embodiment of the present invention also provides a computer-readable storage medium for storing a computer program. The computer-readable storage medium enables a computer to execute the corresponding process implemented by the UE / BS in each method of the embodiment of the present invention. For the sake of brevity, the details are not repeated herein.

[0103] The embodiment of the present invention further provides a computer program product, including computer program instructions. The computer program product enables a computer to execute the corresponding process implemented by the UE / BS in each method of the embodiment of the present invention. For the sake of brevity, the details are not repeated herein.

[0104] The embodiment of the present invention further provides a computer program. The computer program enables a computer to execute the corresponding process implemented by the UE / BS in each method of the embodiment of the present invention. For the sake of brevity, the details are not repeated herein.

[0105] Those skilled in the art will appreciate that, in conjunction with the embodiments described in the embodiments disclosed in this specification, the units and algorithm steps may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the functions described for each specific application, but it should not be considered that the implementation is beyond the scope of this application.

[0106] While the present invention has been described in connection with what is considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment but is intended to cover various arrangements made without departing from the broadest interpretation of the appended claims.

Claims

1. A wireless communication method, performed by a user equipment UE in a network, the method comprising: A single downlink control information DCI is received to schedule multiple physical downlink shared channels PDSCH, wherein the DCI configures one or more physical uplink control channel PUCCH resources or one or more PDSCHs to hybrid automatic repeat request HARQ feedback timing.

2. The method according to claim 1, characterized in that One or more of the PUCCH resources are configured to the UE for PDSCH to HARQ feedback.

3. The method according to claim 1, characterized in that The plurality of PUCCH resources or the plurality of PDSCH to HARQ feedback timings are configured by the DCI and are used to schedule the plurality of PDSCHs.

4. The method according to claim 3, characterized in that The multiple PUCCH resources or the multiple PDSCH to HARQ feedback timings are represented by the bit or field of the DCI, and the bit or field of the DCI is used to indicate one or more PUCCH resources or one or more PDSCH to HARQ feedback timings.

5. The method according to claim 3, characterized in that: In the case of configuring multiple PUCCH resources and multiple PDSCH to HARQ feedback timings at the same time, the number of the multiple PDSCH to HARQ feedback timings is equal to the number of the multiple PUCCH resources, and each of the multiple PUCCH resources has a corresponding PDSCH to HARQ feedback timing.

6. The method according to claim 1, characterized in that A plurality of the PUCCH resources or a single PDSCH to HARQ feedback timing is configured by a single DCI to schedule a plurality of the PDSCHs.

7. The method according to claim 6, characterized in that In the case where a plurality of the PUCCH resources and a single PDSCH-to-HARQ feedback timing are configured simultaneously, each of the plurality of the PUCCH resources corresponds to the same PDSCH-to-HARQ feedback timing.

8. The method according to claim 1, characterized in that A single PUCCH resource or multiple PDSCHs to HARQ feedback timing is configured by a single DCI to schedule multiple PDSCHs.

9. The method according to claim 8, characterized in that In the case where a single PUCCH resource and a plurality of PDSCH-to-HARQ feedback timings are configured simultaneously, the single PUCCH resource corresponds to different PDSCH-to-HARQ feedback timings.

10. The method according to claim 1, characterized in that The multiple schedulable PDSCHs are divided into several groups, and each group of the multiple PDSCHs has a PUCCH used for the PDSCH to HARQ feedback.

11. The method according to claim 1, characterized in that: The repetition of multiple PDSCHs is scheduled by having a single DCI, and the initial PDSCH is transmitted first, and then the PDSCH is repeatedly transmitted.

12. The method according to claim 1, characterized in that When a single DCI schedules a repetition with multiple PDSCHs, the DCI configures two PUCCHs, wherein one of the two PUCCHs is used to feedback the HARQ of the initial PDSCH transmission, and the other of the two PUCCHs is used to feedback the HARQ of the repeated transmission of the PDSCH.

13. A wireless communication method, performed by a user equipment UE in a network, the method comprising: is configured with at least one configuration authorization CG / semi-persistent scheduling SPS configuration mode, the configuration mode including a CG / SPS configuration matching a traffic arrival period; and Receive downlink control information DCI, which is used to activate or deactivate one or more CG / SPS configuration modes.

14. The method according to claim 13, characterized in that The time starting point of each CG / SPS configuration in the CG / SPS configuration mode changes dynamically.

15. The method according to claim 13, characterized in that The time starting point of each CG / SPS configuration in the CG / SPS configuration mode is semi-statically configured by radio resource control RRC signaling or dynamically indicated by downlink control information DCI.

16. The method according to claim 13, characterized in that Through the DCI, all CG / SPS configurations in one or more of the CG / SPS configuration modes are activated or deactivated.

17. The method according to claim 13, characterized in that RRC signaling is used to enable or disable activation or deactivation of one or more of the CG / SPS configuration modes.

18. A wireless communication method, performed by a user equipment UE in a network, the method comprising: At least one search space pattern is configured, wherein the search space pattern includes a search space set matching a traffic arrival period.

19. The method according to claim 18, characterized in that The search space set is associated with the same control resource set.

20. The method according to claim 18, characterized in that The time intervals between any two search spaces in the search space pattern are the same or different.

21. The method according to claim 18, characterized in that A set of search space patterns is configured, and downlink control information DCI or a medium access control MAC control component CE is used to indicate a search space pattern in the search space pattern set.

22. The method according to claim 18, characterized in that At least one parameter of the search space is dynamically changed by signaling.

23. The method according to claim 22, characterized in that The signaling is at least one of MAC CE, DCI, piggybacked DCI or piggybacked uplink control information UCI.

24. A wireless communication method, performed by a base station BS in a network, the method comprising: A single downlink control information DCI is transmitted to a user equipment UE to schedule multiple physical downlink shared channels PDSCH, wherein the DCI configures one or more physical uplink control channel PUCCH resources or one or more PDSCHs to a hybrid automatic repeat request HARQ feedback timing.

25. The method according to claim 24, characterized in that One or more of the PUCCH resources are configured to the UE for PDSCH to HARQ feedback.

26. The method according to claim 24, characterized in that The plurality of PUCCH resources or the plurality of PDSCH to HARQ feedback timings are configured by the DCI and are used to schedule the plurality of PDSCHs.

27. The method according to claim 26, characterized in that The multiple PUCCH resources or the multiple PDSCH to HARQ feedback timings are represented by the bit or field of the DCI, and the bit or field of the DCI is used to indicate one or more PUCCH resources or one or more PDSCH to HARQ feedback timings.

28. The method according to claim 26, characterized in that In the case of configuring multiple PUCCH resources and multiple PDSCH to HARQ feedback timings at the same time, the number of the multiple PDSCH to HARQ feedback timings is equal to the number of the multiple PUCCH resources, and each of the multiple PUCCH resources has a corresponding PDSCH to HARQ feedback timing.

29. The method according to claim 24, characterized in that A plurality of the PUCCH resources or a single PDSCH to HARQ feedback timing is configured by a single DCI to schedule a plurality of the PDSCHs.

30. The method according to claim 29, characterized in that In the case where a plurality of the PUCCH resources and a single PDSCH-to-HARQ feedback timing are configured simultaneously, each of the plurality of the PUCCH resources corresponds to the same PDSCH-to-HARQ feedback timing.

31. The method according to claim 24, characterized in that A single PUCCH resource or multiple PDSCHs to HARQ feedback timing is configured by a single DCI to schedule multiple PDSCHs.

32. The method according to claim 31, characterized in that In the case where a single PUCCH resource and a plurality of PDSCH-to-HARQ feedback timings are configured simultaneously, the single PUCCH resource corresponds to different PDSCH-to-HARQ feedback timings.

33. The method according to claim 24, characterized in that The multiple schedulable PDSCHs are divided into several groups, and each group of the multiple PDSCHs has a PUCCH used for the PDSCH to HARQ feedback.

34. The method according to claim 24, characterized in that The repetition of multiple PDSCHs is scheduled by having a single DCI, and the initial PDSCH is transmitted first, and then the PDSCH is repeatedly transmitted.

35. The method according to claim 24, characterized in that When a single DCI schedules a repetition with multiple PDSCHs, the DCI configures two PUCCHs, wherein one of the two PUCCHs is used to feedback the HARQ of the initial PDSCH transmission, and the other of the two PUCCHs is used to feedback the HARQ of the repeated transmission of the PDSCH.

36. A wireless communication method, performed by a base station BS in a network, the method comprising: Configure at least one configuration authorization CG / semi-persistent scheduling SPS configuration mode of the user equipment UE, where the configuration mode includes a CG / SPS configuration matching a traffic arrival period; and Transmit downlink control information DCI to the UE, where the DCI is used to activate or deactivate one or more CG / SPS configuration modes.

37. The method according to claim 36, characterized in that The time starting point of each CG / SPS configuration in the CG / SPS configuration mode changes dynamically.

38. The method according to claim 36, characterized in that The time starting point of each CG / SPS configuration in the CG / SPS configuration mode is semi-statically configured by radio resource control RRC signaling or dynamically indicated by downlink control information DCI.

39. The method according to claim 36, characterized in that Through the DCI, all CG / SPS configurations in one or more of the CG / SPS configuration modes are activated or deactivated.

40. The method according to claim 36, characterized in that RRC signaling is used to enable or disable activation or deactivation of one or more of the CG / SPS configuration modes.

41. A wireless communication method, performed by a base station BS in a network, the method comprising: At least one search space mode is configured for a user equipment UE, where the search space mode includes a search space set matching a traffic arrival period.

42. The method according to claim 41, characterized in that The search space set is associated with the same control resource set.

43. The method according to claim 41, characterized in that The time intervals between any two search spaces in the search space pattern are the same or different.

44. The method according to claim 41, characterized in that A set of search space patterns is configured, and downlink control information DCI or a medium access control MAC control component CE is used to indicate a search space pattern in the search space pattern set.

45. The method according to claim 41, characterized in that At least one parameter of the search space is dynamically changed by signaling.

46. ​​The method according to claim 45, characterized in that The signaling is at least one of MAC CE, DCI, piggybacked DCI or piggybacked uplink control information UCI.

47. A user equipment UE, comprising a processor and a transceiver, wherein the processor is configured to call and run program instructions stored in the memory to cooperate with the transceiver to perform the method according to any one of claims 1 to 12.

48. A base station BS, comprising a processor and a transceiver, wherein the processor is configured to call and run program instructions stored in the memory to cooperate with the transceiver to perform the method according to any one of claims 24 to 35.

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