Wireless communication method, terminal device and network device

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first indication information and second indication information, the terminal device comprising a first group identifier and a first HARQ process, the first indication information being used for indicating whether to start HARQ feedback for the first group identifier, and the second indication information being used for indicating whether to start HARQ feedback for the first HARQ process; and the terminal device determines whether to send HARQ feedback information corresponding to a first PDSCH according to the first indication information and / or the second indication information, the first PDSCH being associated with the first HARQ process. According to the invention, whether to transmit the HARQ feedback information corresponding to the first PDSCH or not can be determined based on the first indication information or the second indication information. Therefore, even if the configuration of the first indication information conflicts with the configuration of the second indication information, the enabling / disabling of the HARQ feedback corresponding to the first PDSCH can still be determined.

Description

Wireless communication method, terminal device, and network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] In some communication technologies (such as non-terrestrial networks (NTN)), the enable / disable of hybrid automatic repeat request (HARQ) feedback is configured for the HARQ process, while the enable / disable of HARQ feedback in multimedia broadcast multicast service (MBS) is configured for the group identifier (such as group radio network temporary identity (G-RNTI) / group configured scheduling radio network temporary identity (G-CS-RNTI)). This may lead to conflicts in HARQ feedback configuration. For example, when NTN and MBS are combined, the network equipment may not be able to avoid MBS and unicast services using the same HARQ process, so there may be a conflict in HARQ feedback configuration. For example, MBS configures the transmission of a certain G-RNTI to disable HARQ feedback, but NTN configures the corresponding HARQ process to enable HARQ feedback. In the case of a conflict in HARQ feedback configuration, it is difficult for the terminal device to determine whether to enable HARQ feedback.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal device, and network device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided. The method includes: a terminal device receiving first indication information and second indication information, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; and the terminal device determining, based on the first indication information and / or the second indication information, whether to send HARQ feedback information corresponding to a first PDSCH, wherein the first PDSCH is associated with the first HARQ process.

[0006] In a second aspect, a method for wireless communication is provided. The method includes: a network device sending first indication information and second indication information to a terminal device, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; the network device sending a first PDSCH associated with the first HARQ process to the terminal device; wherein the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

[0007] In a third aspect, a method for wireless communication is provided. The method includes: a terminal device receives first downlink data corresponding to a first HARQ process, the first downlink data is indicated based on a first group identifier of the terminal device, and the first group identifier is configured with discontinuous reception (DRX); after the terminal device performs HARQ feedback for the first downlink data, the terminal device starts a first timer associated with the first HARQ process, wherein a timing duration of the first timer is determined based on a round-trip time between the terminal device and a network device, and a physical downlink control channel (PDCCH) is not monitored during the operation of the first timer; if the first timer times out, the terminal device starts a second timer associated with the first HARQ process, wherein the PDCCH is monitored during the operation of the second timer.

[0008] In a fourth aspect, a terminal device is provided. The terminal device includes: a first receiving unit, configured to receive first indication information and second indication information, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; and a first determining unit, configured to determine whether to send HARQ feedback information corresponding to a first PDSCH based on the first indication information and / or the second indication information, wherein the first PDSCH is associated with the first HARQ process.

[0009] In a fifth aspect, a network device is provided. The network device includes: a first sending unit, configured to send first indication information and second indication information to a terminal device, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; a second sending unit, configured to send a first PDSCH associated with the first HARQ process to the terminal device; wherein the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

[0010] In a sixth aspect, a terminal device is provided. The terminal device includes: a second receiving unit, configured to receive first downlink data corresponding to a first HARQ process, the first downlink data being indicated based on a first group identifier of the terminal device, and the first group identifier being configured with DRX; a first starting unit, configured to start a first timer associated with the first HARQ process after the terminal device performs HARQ feedback for the first downlink data, wherein a timing duration of the first timer is determined based on a round-trip time between the terminal device and a network device, and PDCCH is not monitored during the operation of the first timer; and a second starting unit, configured to start a second timer associated with the first HARQ process if the first timer times out, wherein PDCCH is monitored during the operation of the second timer.

[0011] In the seventh aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect and / or the third aspect.

[0012] In an eighth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0013] In a ninth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0014] In the tenth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables the terminal device and / or network device to execute some or all of the steps in the methods of the above aspects.

[0015] In an eleventh aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal device and / or a network device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0016] In the twelfth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0017] Based on the present application, it can be determined based on which information or information whether to transmit the HARQ feedback information corresponding to the first PDSCH. Therefore, even if the HARQ feedback configuration indicated by the first indication information and the second indication information conflicts, the enabling / disabling of the HARQ feedback corresponding to the first PDSCH can still be determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0019] FIG. 2 is a schematic diagram of a transparent forwarding network architecture.

[0020] FIG3 is a schematic diagram of a regeneration and forwarding network structure.

[0021] FIG4A is an example diagram of a PTP transmission mode.

[0022] FIG4B is an example diagram of an MTP sending mode.

[0023] FIG5 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0024] FIG6 is a schematic flowchart of another wireless communication method provided in an embodiment of the present application.

[0025] FIG7 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0026] FIG8 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0027] FIG9 is a schematic structural diagram of another terminal device provided in an embodiment of the present application.

[0028] FIG10 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solution in this application will be described below with reference to the accompanying drawings.

[0030] Communication System

[0031] FIG1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include communication devices. The communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0032] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0033] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0034] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0035] Developed by the Third Generation Partnership Project (3GPP), 5G aims to meet people's demands for speed, latency, high-speed mobility, and energy efficiency, while adapting to the diversity and complexity of future services. Key 5G application scenarios include enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC), and massive machine-type communications (mMTC).

[0036] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D). For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through a base station.

[0037] The network device in the embodiments of the present application may be a device for communicating with a terminal device. The network device may also include an access network device. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The access network device may also be referred to as a radio access network device or a base station. The access network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. Access network equipment can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the access network device.

[0038] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0039] The communication equipment involved in a wireless communication system can include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented by devices, that is, core network elements are core network devices. It is understood that core network devices can also be a type of network equipment.

[0040] The core network elements in the embodiments of the present application may include network elements that process and forward user signaling and data. For example, the core network equipment may include core network access and mobility management function (AMF), session management function (SMF), user plane gateway, location management function (LMF) and other core network equipment. Among them, the user plane gateway may be a server with functions such as mobility management, routing, and forwarding of user plane data, generally located on the network side, such as a serving gateway (SGW) or a packet data network gateway (PGW) or a user plane network element function entity (UPF). Of course, the core network may also include other network elements, which are not listed here one by one.

[0041] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0042] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0043] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0044] Radio resource control (RRC) connection status

[0045] In some communication systems (such as NR systems), RRC states (referred to as states) may include an RRC idle state (RRC_IDLE), an RRC connected state (RRC_CONNECTED), and an RRC inactive state (RRC_INACTIVE). The RRC idle state is referred to as the idle state, the RRC connected state is referred to as the connected state, and the RRC inactive state is referred to as the inactive state.

[0046] In RRC_IDLE mode, there is no RRC connection between the terminal device and the network device. The mobility of the terminal device is primarily reflected in the cell selection / reselection based on the terminal device. In RRC_IDLE mode, the core network (CN) initiates the paging process for the network device to the terminal device, and the paging area is configured by the CN. In addition, in RRC_IDLE mode, the network device does not have the terminal device's access stratum (AS) context.

[0047] In RRC_CONNECTED mode, an RRC connection exists between the terminal device and the network device. Both the network device and the terminal device store the terminal device's AS context. In RRC_CONNECTED mode, the network device only knows the terminal device's location at the cell level. In RRC_CONNECTED mode, unicast data can be transmitted between the terminal device and the network device, and the terminal device's mobility is managed and controlled by the network device.

[0048] RRC_INACTIVE is a new state defined by some communication systems (such as NR systems). RRC_INACTIVE can reduce the air interface signaling of the communication system. In addition, the terminal device in RRC_INACTIVE can quickly restore the wireless connection and quickly restore the data service. Under RRC_INACTIVE, there is a connection between CN-NR. The AS context of the terminal device is stored on a certain network device. In addition, under RRC_INACTIVE, the paging process of the network device to the terminal device can be triggered by the radio access network (RAN), and the paging area based on RAN can be managed by RAN. In addition, under RRC_INACTIVE, the location of the terminal device that the network device can obtain is based on the paging area level of RAN, and the mobility of the terminal device is mainly reflected in the cell selection / reselection based on the terminal device.

[0049] Non-terrestrial network (NTN)

[0050] NTN provides communication services to users through non-terrestrial means, such as satellites or UAS platforms.

[0051] Terrestrial networks (TN) are not suitable for deploying communication equipment in locations like oceans, mountains, and deserts. Furthermore, due to the cost of setting up and operating communication equipment, terrestrial networks typically do not cover sparsely populated areas. NTN offers many advantages over TN. First, NTN communication is not restricted by user location. NTN communication networks are not subject to geographical restrictions. In theory, satellites orbit the Earth, allowing satellite communications to cover every corner of the globe. Furthermore, the areas covered by NTN equipment are far greater than those covered by terrestrial equipment. For example, a single satellite can cover a large ground area. Second, NTN communication has significant social value. NTN communication can achieve coverage at a low cost. For example, satellite communications can provide low-cost coverage to remote mountainous areas or impoverished and underdeveloped countries or regions. This allows people in these areas to enjoy advanced voice communications and mobile internet technologies, helping to narrow the digital divide with developed regions and promoting their development. Third, NTN communication offers long communication distances without significantly increasing communication costs. Furthermore, NTN communication is highly stable. For example, NTN communication is not restricted by natural conditions and can be used even in the event of a natural disaster.

[0052] According to their orbital altitudes, communication satellites can be divided into low-Earth orbit (LEO) satellites, medium-Earth orbit (MEO) satellites, geostationary Earth orbit (GEO) satellites, and high elliptical orbit (HEO) satellites. The following is a detailed introduction to LEO satellites and GEO satellites.

[0053] LEO satellites have orbital altitudes ranging from 500 km to 1500 km. Their orbital period is approximately 1.5 to 2 hours. Signal propagation delay for single-hop communication between users is typically less than 20 milliseconds, and the maximum satellite visibility time is 20 minutes. The short signal propagation distance and low link loss reduce the transmit power requirements of user terminals.

[0054] GEO satellites orbit at an altitude of 35,786 km. They orbit the Earth every 24 hours. The signal propagation delay for single-hop communication between users is typically 250 milliseconds.

[0055] To ensure satellite coverage and increase the capacity of the entire satellite communication system, satellites can use multiple beams to cover the ground. For example, a single satellite can form dozens or even hundreds of beams to cover the ground. A single satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0056] The NTN network can be implemented based on a satellite network architecture, which can include the following network elements: gateway, feeder link, service link, satellite, and inter-satellite link (ISL).

[0057] There can be one or more gateways. A gateway can be used to connect satellites to the terrestrial public network. A gateway is usually located on the ground.

[0058] The feeder link may be a link for communication between the gateway and the satellite.

[0059] The service link may be a link for communication between the terminal device and the satellite.

[0060] Satellite network structures can be divided into transparent payload network architecture and regenerative payload network architecture based on the functions they provide.

[0061] Figure 2 is a schematic diagram of a transparent forwarding network architecture. This architecture can provide wireless frequency filtering, frequency conversion, and amplification. It only transparently forwards signals without changing the waveform of the forwarded signal.

[0062] Figure 3 is a schematic diagram of a regenerative forwarding network architecture. This architecture can provide radio frequency filtering, frequency conversion, and amplification, as well as demodulation / decoding, routing / conversion, and encoding / modulation. In this architecture, satellites can perform some or all of the functions of a base station. Intersatellite links can exist within this architecture.

[0063] HARQ Enhancement in NTN

[0064] In NTNs, satellite-to-ground latency is relatively long. For example, the single-path transmission latency in a GEO at an altitude of 35,786 km can reach 272.4 ms. Furthermore, the single-path transmission latency in non-GEO (e.g., LEO at an altitude of 600 km) can be at least 14.2 ms. Furthermore, the single-path transmission latency in a MEO at an altitude of 10,000 km can reach 95.2 ms. This long latency makes the application of HARQ retransmission technology used in terrestrial communication networks in NTNs challenging. For example, at least in GEO and MEO networks, an excessive number of HARQ processes can limit the buffering capacity of terminal devices. Therefore, some communication protocols (such as 3GPP Rel-17) specify that NTNs have the ability to configure whether terminal devices should disable HARQ feedback and retransmission functions, that is, to enable / disable HARQ feedback. Furthermore, based on terminal capabilities, NTNs may determine that a maximum of 32 HARQ processes are supported.

[0065] Disabling or disabling HARQ means that the terminal device cannot perform soft combining. When PDSCH transmission fails, radio link control (RLC) layer retransmissions can still work, but compared to HARQ retransmissions at the media access control (MAC) layer, these have the following issues: first, lower spectral efficiency, as the terminal device cannot soft combine multiple retransmissions; and second, longer latency. To avoid RLC layer retransmissions, NTNs must improve the initial transmission success rate by reducing spectral efficiency (such as repeated transmissions, high block error rate (BLER) targets, and low modulation and coding scheme (MCS) scheduling). However, this also results in lower NTN frequency efficiency. Therefore, to avoid a simplistic "one-size-fits-all" approach that blindly uses this energy-intensive and inefficient technology, related technologies have proposed HARQ process enhancements for NTNs. These HARQ process enhancements for NTNs primarily include the following two aspects.

[0066] First, for the downlink, HARQ feedback can be enabled / disabled. However, in the scenario where semi-persistent scheduling (SPS) is deactivated, HARQ feedback can be required to be sent at all times. Enabling / disabling HARQ feedback is configured separately for each HARQ process. The network device can configure which processes of the terminal device's multiple HARQ processes have HARQ feedback enabled and / or disabled through RRC signaling.

[0067] Secondly, for dynamic grants on the uplink (UL), the network device can configure an UL HARQ state for each HARQ process of the terminal device. The UL HARQ state can include: retransmission allowed or no retransmission mode. Furthermore, each logical channel (LCH) can be configured to transmit in a UL HARQ state. Therefore, data on an LCH configured with an UL HARQ state can only be mapped to a HARQ process configured with the same state; otherwise, data processing errors will occur.

[0068] MBS

[0069] Some video software transmits data content in unicast mode. When there are too many users, unicast mode can overwhelm the network, leading to congestion. In this case, the wireless downlink rate may be a bottleneck for the user experience. Therefore, when multiple users are watching video content simultaneously in a wireless cell, broadcasting within the wireless cell can be considered to ensure smooth viewing for multiple users. The development of MBS in some communication systems (such as NR systems) enables multimedia content to be transmitted to terminal devices via broadcast, allowing users to watch broadcast and television programs or receive data push services anytime and anywhere.

[0070] In the physical layer design of MBS in some communication systems (such as Rel-17NR systems), the name of MBS is slightly different depending on the status of the terminal device receiving the MBS. Multicast is when a network device sends MBS services to a group of connected terminal devices. The network device can send a group-common physical downlink control channel (PDCCH) to schedule a group-common physical downlink shared channel (PDSCH). The cyclic redundancy check (CRC) of the group-common PDCCH can be scrambled using G-RNTI or G-CS-RNTI. Broadcast is when a network device sends MBS services to terminal devices within coverage. The terminal device can be in a connected state or a non-connected state, and the network device can send a group-common PDCCH to schedule a group-common PDSCH. The CRC of the group-common PDCCH can be scrambled using the multicast control channel radio network temporary identity (MCCH-RNTI) or G-RNTI.

[0071] The following uses NR MBS as an example to illustrate the transmission modes supported by multicast scheduling. For connected terminal devices, the transmission modes can include point-to-point transmission mode and point-to-multipoint transmission mode.

[0072] In PTP transmission mode, for a connected terminal device, the network device can send a dedicated PDCCH to the terminal device. The CRC of the dedicated PDCCH can be scrambled using the terminal device's dedicated RNTI (such as the cell radio network temporary identity (C-RNTI)). The terminal device's dedicated PDCCH is used to indicate the terminal device's dedicated PDSCH. In addition, the indicated PDSCH is scrambled using the same terminal device's dedicated RNTI as the dedicated PDCCH.

[0073] As shown in Figure 4A, in the PTP transmission mode, for the three terminal devices shown in Figure 4A (represented by UE a, UE b, and UE c), the network device sends corresponding dedicated PDCCHs to these three terminal devices respectively. The dedicated PDCCH of UE a is scrambled by the UE a dedicated C-RNTI (represented by C-RNTI a). The dedicated PDCCH of UE a is used to indicate the dedicated PDSCH of UE a. The dedicated PDSCH of UE a is also scrambled by C-RNTI a. The dedicated PDCCH of UE b is scrambled by the UE b dedicated C-RNTI (represented by C-RNTI b). The dedicated PDCCH of UE b is used to indicate the dedicated PDSCH of UE b. The dedicated PDSCH of UE b is also scrambled by C-RNTI b. The dedicated PDCCH of UE c is scrambled by the UE c dedicated C-RNTI (represented by C-RNTI c). The dedicated PDCCH of UE c is used to indicate the dedicated PDSCH of UE c. The dedicated PDSCH of UE c is also scrambled by C-RNTI c.

[0074] It should be noted that the PTP transmission mode can only be used as the retransmission transmission mode in MBS.

[0075] In PTM transmission mode, a network device can send a group-common PDCCH to a group of connected terminal devices. The CRC of the group-common PDCCH (GC-PDCCH) can be scrambled with the group-common RNTI. The group-common PDCCH is used to schedule the group-common PDSCH (GC-PDSCH). The scheduled PDSCH is scrambled with the same group-common RNTI as the group-common PDCCH.

[0076] As shown in Figure 4B, in PTM transmission mode, the three terminal devices shown in Figure 4B (represented by UE a, UE b, and UE c) form a group of terminal devices (represented by g). The network device sends a GC-PDCCH to this group of terminal devices. The GC-PDCCH is used to schedule the GC-PDSCH. Both the GC-PDCCH and GC-PDSCH are scrambled using the group's G-RNTI (represented by G-RNTI g).

[0077] HARQ Feedback in MBS

[0078] HARQ feedback can further improve group scheduling efficiency. MBS supports the following two types of HARQ feedback reports.

[0079] The first HARQ feedback reporting mode follows the unicast HARQ feedback approach. If the terminal device correctly receives the transport block, a HARQ positive acknowledgment (HARQ-ACK) is sent in the PUCCH. If the terminal device does not correctly receive the transport block, a HARQ negative acknowledgment (HARQ-NACK) is sent. The first HARQ feedback reporting mode can also be called the positive acknowledgment / negative acknowledgment (ACK / NACK) mode.

[0080] For example, a network device can schedule the initial transmission of a transport block (TB) to a group of terminal devices using PTM transmission mode 1. Based on the feedback (ACK, NACK, or no feedback) from each terminal device in the group, the network device can schedule the retransmission of this TB using PTM transmission mode 1 or PTP transmission mode.

[0081] For the second HARQ feedback reporting mode, only when the terminal device does not correctly receive the transport block will it send HARQ-NACK information in the PUCCH. The second HARQ feedback reporting mode can also be called negative acknowledgement (NACK-only) mode.

[0082] For example, when the network device configures the second HARQ feedback reporting mode for the terminal device, the network device can schedule the initial transmission of a TB for a group of terminal devices using PTM transmission mode 1. If at least one terminal device in the group of terminal devices feedbacks a NACK, the network device can schedule the retransmission of this TB using PTM transmission mode 1.

[0083] For MBS, the network device can enable / disable multicast HARQ feedback. For terminal devices, the network device can enable / disable multicast HARQ feedback semi-statically or dynamically. For example, the network device can semi-statically enable / disable multicast HARQ feedback through RRC signaling. Alternatively, the network device can dynamically enable / disable multicast HARQ feedback through downlink control information (DCI). It should be noted that enabling / disabling HARQ feedback is for a group of terminal devices, that is, enabling / disabling HARQ feedback is configured separately for each G-RNTI / G-CS-RNTI. For example, enabling / disabling HARQ feedback in RRC signaling is configured separately for each G-RNTI / G-CS-RNTI.

[0084] DRX in MBS

[0085] In some communication systems, network equipment can configure a DRX function for a terminal device. When the DRX function is configured for a terminal device, the terminal device can monitor the PDCCH discontinuously to save power for the terminal device.

[0086] For MBS, the DRX function is configured according to a group of terminal devices, that is, the DRX function is configured according to each G-RNTI / G-CS-RNTI.

[0087] The DRX configuration parameters in MBS may include one or more of the following: onDuration Timer (drx-onDurationTimerPTM) for PTM transmission mode, frame offset (drx-SlotOffsetPTM) for PTM transmission mode, inactivity timer (drx-InactivityTimerPTM) for PTM transmission mode, longcyclestartoffsetPTM for PTM transmission mode, downlink retransmission timer (drx-HARQ-RTT-TimerDL-PTM) for PTM transmission mode, uplink retransmission timer (drx-ULRetransmissionTimer-PTM) for PTM transmission mode, and long cycle start offset (drx-LongCycleStartOffset-PTM) for PTM transmission mode. These are described below.

[0088] drx-onDurationTimerPTM is used to indicate the DRX duration at the beginning of a DRX cycle.

[0089] drx-SlotOffsetPTM is used to indicate the delay before starting the drx-onDurationTimerPTM.

[0090] drx-InactivityTimerPTM is used to indicate the DRX duration after detecting a PDCCH, where the PDCCH indicates a new DL multicast transmission for the MAC entity.

[0091] drx-LongCycleStartOffsetPTM is used to indicate the long DRX cycle (drx-LongCycle-PTM) and defines the drx-StartOffsetPTM of the subframe where the long DRX cycle starts.

[0092] drx-HARQ-RTT-TimerDL-PTM is configured per DL HARQ process for MBS multicast. drx-RetransmissionTimerDL-PTM can be used to indicate the maximum duration until a DL multicast retransmission is received.

[0093] drx-HARQ-RTT-TimerDL-PTM is configured for each downlink HARQ process of MBS (per DL HARQ process for MBS multicast). drx-HARQ-RTT-TimerDL-PTM is used to indicate the minimum duration before a DL multicast assignment for HARQ retransmission is expected by the MAC entity.

[0094] The following describes drx-HARQ-RTT-TimerDL-PTM and drx-HARQ-RTT-TimerDL-PTM in detail.

[0095] When a terminal device receives a downlink data transmission packet and the CRC check fails, it sends a NACK to the network device. Retransmission will not occur until at least the drx-HARQ-RTT-TimerDL-PTM duration has passed. Therefore, when drx-HARQ-RTT-TimerDL-PTM is running, the terminal device does not need to monitor the PDCCH, thereby reducing energy consumption. Once drx-HARQ-RTT-TimerDL-PTM times out, the terminal device can enable drx-HARQ-RTT-TimerDL-PTM and receive retransmitted data from the network device before drx-HARQ-RTT-TimerDL-PTM times out.

[0096] For each G-RNTI / G-CS-RNTI, the conditions for the terminal device to start and stop drx-RetransmissionTimerDL-PTM are as follows: when the terminal device receives a PDCCH indicating a downlink transmission, or when the terminal device receives a medium access control packet data unit (MAC PDU) on the configured downlink authorization resources, the terminal device stops the drx-RetransmissionTimerDL-PTM corresponding to the HARQ process; the terminal device starts the drx-HARQ-RTT-TimerDL-PTM corresponding to the HARQ process after completing the transmission of the HARQ feedback (if HARQ feedback is enabled) for this downlink transmission.

[0097] The condition for the terminal device to start drx-RetransmissionTimerDL-PTM is: if the timer drx-HARQ-RTT-TimerDL-PTM corresponding to a certain HARQ of the terminal device times out and the decoding of the downlink data transmitted using this HARQ process is unsuccessful, the terminal device starts the drx-RetransmissionTimerDL-PTM corresponding to this HARQ process.

[0098] As can be seen from the above, the HARQ feedback enable / disable in some communication technologies (such as NTN) is configured separately for each HARQ process, while the HARQ feedback enable / disable in MBS is configured separately for each G-RNTI / G-CS-RNTI. This may lead to conflicts in HARQ feedback configuration. For example, when NTN and MBS are combined, the network may not be able to avoid MBS and unicast services using the same HARQ process, so there may be conflicts in HARQ feedback configuration. For example, MBS configures the transmission of a certain G-RNTI to disable HARQ feedback, but NTN configures the corresponding HARQ process to enable HARQ feedback. In the case of a conflict in HARQ feedback configuration, it is difficult for the terminal device to determine whether to enable HARQ feedback.

[0099] FIG5 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application to solve the above-mentioned problem. The method shown in FIG5 can be performed by a terminal device and a network device. The method shown in FIG5 can include steps S510 and S520.

[0100] Step S510: The terminal device receives first indication information and second indication information sent by the network device.

[0101] To facilitate understanding of the first indication information, the first group of identifiers included in the terminal device is first explained below.

[0102] A terminal device may belong to a first broadcast multicast group, which may include one or more terminal devices. A first group identifier may be associated with the first broadcast multicast group. A network device may send data to the first broadcast multicast group via an MBS. The network device may schedule a common group PDSCH for the first broadcast multicast group by sending a group-common PDCCH. The first group identifier may be used to scramble the group-common PDCCH and the common group PDSCH of the first broadcast multicast group. The first group identifier may include a G-RNTI or a G-CS-RNTI.

[0103] The network device may configure one or more group identifiers for the terminal device. The one or more group identifiers may include a first group identifier.

[0104] The first indication information may be used to indicate whether HARQ feedback is enabled for the first group identifier. It is understood that the first indication information indicates whether HARQ feedback is enabled based on the granularity of the group identifier. As an implementation, the first indication information may indicate whether HARQ feedback is enabled / disabled in the MBS.

[0105] As a possible implementation manner, when the first group identifier belongs to one or more group identifiers configured for the terminal device, the first indication information can be used to indicate whether HARQ feedback is enabled for each of the one or more group identifiers.

[0106] The second indication information may be used to indicate whether HARQ feedback is enabled for the first HARQ process of the terminal device. It is understood that the second indication information indicates whether HARQ feedback is enabled at the HARQ process granularity. As an implementation, the second indication information may indicate whether HARQ feedback is enabled / disabled in the NTN.

[0107] As a possible implementation manner, the second indication information may be used to indicate whether to enable / disable HARQ feedback for each HARQ process.

[0108] Step S520: The terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information.

[0109] Before step S520, step S515 may be included. In step S515, the network device sends a first PDSCH associated with a first HARQ process to the terminal device.

[0110] The network device may send the first PDSCH to the terminal device via MBS, that is, the first PDSCH may belong to the public group PDSCH and be indicated by the first group identifier. The network device may also send the first PDSCH to the terminal device via unicast, that is, the first PDSCH may be indicated by the dedicated RNTI of the terminal device. The dedicated RNTI may include, for example, a C-RNTI or a temporary cell radio network temporary identity (TC-RNTI).

[0111] The first PDSCH may be a PDSCH sent in NTN or a PDSCH sent in TN.

[0112] As described above, the first indication information may be used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information may be used to indicate whether HARQ feedback is enabled for the first HARQ process. The indication of the first indication information may conflict with the indication of the second indication information, or the content of the indications may not match. That is, there may be a conflict in the configuration of whether to enable HARQ feedback. For example, the first indication information may indicate whether HARQ feedback is enabled, and the second indication information may indicate whether HARQ feedback is disabled. Alternatively, the first indication information may indicate whether HARQ feedback is disabled, and the second indication information may indicate whether HARQ feedback is enabled.

[0113] The present application can determine whether to transmit the HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information. That is, based on the present application, it can be determined based on which information or information whether to transmit the HARQ feedback information corresponding to the first PDSCH. For example, the enable / disable of the HARQ feedback corresponding to the first PDSCH can be determined only based on the first indication information. Alternatively, the enable / disable of the HARQ feedback corresponding to the first PDSCH can be determined only based on the second indication information. Alternatively, the enable / disable of the HARQ feedback corresponding to the first PDSCH can be jointly determined based on the first indication information and the second indication information. Therefore, even in the case where the configurations of the first indication information and the second indication information conflict, the enable / disable of the HARQ feedback corresponding to the first PDSCH can still be clearly determined.

[0114] In some embodiments, whether to transmit the HARQ feedback information corresponding to the first PDSCH may be determined based on the first indication information. That is, the first indication information may be used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0115] As an implementation manner, if the first PDSCH is a PDSCH for a multicast / broadcast service, it may be determined whether to transmit the HARQ feedback information corresponding to the first PDSCH according to the first indication information.

[0116] As an implementation manner, if the first PDSCH is based on the first group identifier indication, it can be determined whether to transmit the HARQ feedback information corresponding to the first PDSCH according to the first indication information.

[0117] It should be noted that the first PDSCH based on the first group identifier indication may include: the first PDSCH is scrambled based on the first group identifier. For example, if the first group identifier includes G-RNTI, the first PDSCH may be scheduled or activated based on the PDCCH scrambled by G-RNTI. In some embodiments, the first PDSCH based on the first group identifier indication may include: the first transmission of the configured downlink assignment is scheduled or activated by the PDCCH scrambled by G-CS-RNTI. If the first group identifier includes G-CS-RNTI, the first PDSCH is the PDSCH corresponding to the configured downlink assignment, and the configured downlink assignment is associated with the G-CS-RNTI.

[0118] The present application can determine whether the first PDSCH is related to the MBS service and then refer to the HARQ feedback enable / disable indication information of the MBS, thereby giving priority to meeting the HARQ feedback requirements of the MBS service and thereby improving the transmission success rate of the MBS service.

[0119] In some embodiments, if the first PDSCH is based on a dedicated RNTI indication of the terminal device, it can be determined whether to transmit the HARQ feedback information corresponding to the first PDSCH based on the first indication information or the second indication information, that is, the first indication information or the second indication information can be used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH. The first PDSCH based on the dedicated RNTI indication may include: the first PDSCH is scheduled or activated based on a PDCCH scrambled by the dedicated RNTI.

[0120] The first PDSCH may be a retransmitted PDSCH or a newly transmitted PDSCH. Whether the first PDSCH is a newly transmitted PDSCH or a retransmitted PDSCH may be determined based on which of the first indication information and the second indication information is used to determine whether HARQ feedback information corresponding to the first PDSCH is transmitted. This is described in detail below.

[0121] Taking the first PDSCH as an initial transmission PDSCH as an example, if the first PDSCH is based on a dedicated RNTI indication, the second indication information can be used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH. In other words, if the first PDSCH is an initial transmission, the terminal device can refer to the HARQ feedback enable / disable indication information configured for the first HARQ process to decide whether to send HARQ feedback, and can also ignore the HARQ feedback enable / disable indication information configured for the first group identifier.

[0122] When the first PDSCH is indicated based on a dedicated RNTI and is an initially transmitted PDSCH, it can be determined that the first PDSCH is for a unicast service. For unicast services, whether to transmit HARQ feedback information corresponding to the first PDSCH can be determined based on the second indication information.

[0123] The following description is made by taking the first PDSCH as a retransmitted PDSCH as an example.

[0124] In some embodiments, if the first PDSCH is based on a dedicated RNTI indication and is a retransmitted PDSCH, it can be determined whether to transmit HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information.

[0125] As a possible implementation method, when the first PDSCH is based on a dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, the HARQ feedback information corresponding to the first PDSCH can be determined based on the first indication information or the second indication information according to whether the first PDSCH is for an MBS service or a unicast service. For example, if the first PDSCH is based on a dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a multicast / broadcast service, the first indication information can be used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, and the second indication information can be ignored. For another example, if the first PDSCH is based on a dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a unicast service, the second indication information can be used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, and the first indication information can be ignored. For example, if the first PDSCH is based on a dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, then the second indication information can be used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, and the first indication information can be ignored.

[0126] As described above, in MBS, initial transmissions can be transmitted using the MTP transmission mode, and retransmissions can be transmitted using the PTP transmission mode. Therefore, the first PDSCH mentioned above as a PDSCH for a broadcast / multicast service can include the following situations: the first PDSCH is a retransmission PDSCH; the initial transmission PDSCH corresponding to the first PDSCH can be the second PDSCH; the second PDSCH is indicated by the first group identifier; and the first PDSCH is indicated by the dedicated RNTI.

[0127] It should be noted that if the first group identifier includes the G-RNTI, the second PDSCH can be scheduled or activated based on the PDCCH scrambled by the G-RNTI. If the first group identifier includes the G-CS-RNTI, the second PDSCH can be the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

[0128] It can be seen from this embodiment that the present application can not only determine whether to refer to the first indication information or the second indication information based on the first PDSCH, but also determine whether to refer to the first indication information or the second indication information according to the initial transmission corresponding to the first PDSCH.

[0129] It should be noted that the terminal device executing the method shown in FIG5 may be a terminal device in an activated state.

[0130] It should be noted that the above embodiments are all described using the example of determining whether to send HARQ feedback information corresponding to the first PDSCH based on the first indication information when performing MBS services. The above embodiments may also include: determining whether to send HARQ feedback information corresponding to the first PDSCH based on the second indication information when performing MBS services. The specific implementation method is similar to the above and will not be repeated here.

[0131] In some MBS scenarios, DRX also requires improvements. For example, related technologies fail to consider NTN scenarios when setting DRX-related timers in MBS. As mentioned above, in NTN scenarios, the distance between terminal devices and network equipment is large, resulting in significant latency. However, DRX in MBS does not account for this latency.

[0132] FIG6 is a wireless communication method provided by an embodiment of the present application to solve the above problem. The method shown in FIG6 can be executed by a terminal device. The method shown in FIG6 can include steps S610 to S630.

[0133] Step S610: The terminal device receives first downlink data corresponding to the first HARQ process.

[0134] The first downlink data may be sent by a network device to a terminal device. The network device may include a non-terrestrial communication network device. That is, the method shown in FIG6 may be applied to an NTN system. For example, the network device may include a satellite.

[0135] The first downlink data may be based on a first group identifier indication of the terminal device, and the first group identifier is configured with DRX. The first group identifier is described in detail above and will not be repeated here. In addition, since the first group identifier is related to the MBS, the DRX configured with the first group identifier may be referred to as groupcast / multicast DRX.

[0136] Therefore, it can be seen that the first downlink data can be downlink groupcast / multicast data. For example, the terminal device receiving the first downlink data may include: the terminal device receiving a MAC PDU on a configured downlink multicast assignment, or the PDCCH indicating a downlink multicast transmission.

[0137] When the HARQ feedback of the first downlink data is enabled, the terminal device may perform HARQ feedback for the first downlink data and may also execute step S620.

[0138] Step S620: After the terminal device performs HARQ feedback for the first downlink data, the terminal device starts a first timer associated with the first HARQ process.

[0139] The timing duration of the first timer is determined based on the round-trip time between the terminal device and the network device. During the operation of the first timer, the terminal device does not monitor the PDCCH.

[0140] After the terminal device performs HARQ feedback for the first downlink data, the network device will not immediately transmit according to the HARQ feedback. Therefore, the terminal device can start a first timer, and during the operation of the first timer, it does not monitor the PDCCH, thereby reducing energy consumption. The present application proposes that the timing duration of the first timer is determined based on the round-trip time between the terminal device and the network device. That is, the timing duration of the first timer can be determined based on the distance between the terminal device and the network device. For example, in the case of a long round-trip time, the timing duration of the first timer can be longer, that is, the terminal device can not monitor the PDCCH for a longer period of time. Alternatively, in the case of a short round-trip time, the timing duration of the first timer can be shorter, that is, the terminal device can not monitor the PDCCH for a shorter period of time.

[0141] Therefore, the terminal device can only monitor the PDCCH after the first timer expires. Therefore, even in the NTN scenario, where the distance between the terminal device and the network device is long, the timing of the first timer can be determined based on the round-trip time, so that the terminal device can avoid monitoring the PDCCH for a longer period of time, thereby reducing the energy consumption caused by monitoring the PDCCH in the NTN scenario.

[0142] Step S630: If the first timer times out, the terminal device starts a second timer associated with the first HARQ process, wherein the PDCCH is monitored during the operation of the second timer.

[0143] After the first timer times out, the terminal device may receive retransmission data corresponding to the first downlink data during the operation of the second timer. In this case, the second timer may be drx-RetransmissionTimerDL-PTM.

[0144] In some embodiments, the timing duration of the first timer can be determined based on the timing duration of the third timer and the round-trip time. The third timer is a timer associated with the HARQ process, and does not monitor the PDCCH during the operation of the third timer. For example, the third timer can be a HARQ round-trip time timer.

[0145] Optionally, the third timer may be associated with the MBS. For example, the third timer may be associated with the point-to-multipoint transmission mode. Exemplarily, the third timer may be drx-HARQ-RTT-TimerDL-PTM.

[0146] As described above, the first timer can be applied to the NTN scenario. Therefore, when the third timer is drx-HARQ-RTT-TimerDL-PTM, the first timer can be expressed as drx-HARQ-RTT-TimerDL-PTM-NTN.

[0147] In some embodiments, the duration of the first timer is the sum of the duration of the third timer and the round-trip time. For example, where the round-trip time is represented by the UE-gNB RTT and the third timer is drx-HARQ-RTT-TimerDL-PTM, the duration of the first timer can be set to the duration of drx-HARQ-RTT-TimerDL-PTM plus the latest UE-gNB RTT value. Therefore, the UE-gNB RTT can also be referred to as the duration offset of the second timer.

[0148] It can be understood that this application takes into account the long propagation delay between the terminal device and the network device in some scenarios (such as NTN), and introduces an additional UE-gNB RTT additional value in the drx-HARQ-RTT-TimerDL-PTM in multicast DRX, so that the drx-HARQ-RTT-TimerDL-PTM can be appropriately extended, so that the terminal device can monitor the PDCCH at the appropriate time, thereby avoiding the additional power consumption caused by monitoring the PDCCH too early.

[0149] In some embodiments, the terminal device may start the first timer at the first symbol after performing HARQ feedback. In other words, the first timer may be started immediately after performing HARQ feedback.

[0150] In some embodiments, if the first timer times out, the terminal device starts the second timer at the first symbol after the first timer times out. In other words, the second timer can be started immediately after the first timer times out.

[0151] It should be noted that the methods shown in Figures 5 and 6 can be implemented separately or in combination. When the methods shown in Figures 5 and 6 are implemented in combination, the terminal device can not only improve the transmission success rate of the multicast service, but also reduce the energy consumption during the multicast service transmission process, thereby improving the communication quality of the multicast service and the user experience.

[0152] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0153] 7 is a schematic structural diagram of a terminal device 700 provided in an embodiment of the present application. The terminal device 700 may include a first receiving unit 710 and a first determining unit 720.

[0154] The first receiving unit 710 is configured to receive first indication information and second indication information, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information being used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information being used to indicate whether HARQ feedback is enabled for the first HARQ process.

[0155] The first determining unit 720 is configured to determine whether to send HARQ feedback information corresponding to a first PDSCH according to the first indication information and / or the second indication information, where the first PDSCH is associated with the first HARQ process.

[0156] In some embodiments, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information, including: if the first PDSCH is based on the first group identification indication, determining whether to send the HARQ feedback information corresponding to the first PDSCH based on the first indication information; or, if the first PDSCH is a PDSCH for multicast / broadcast services, determining whether to send the HARQ feedback information corresponding to the first PDSCH based on the first indication information.

[0157] In some embodiments, if the first group identifier includes G-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is scheduled based on the PDCCH encrypted by the G-RNTI; and / or if the first group identifier includes G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

[0158] In some embodiments, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information, including: if the first PDSCH is based on the dedicated RNTI indication of the terminal device, then determining whether to send the HARQ feedback information corresponding to the first PDSCH based on the first indication information and / or the second indication information.

[0159] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication of the terminal device, then according to the first indication information and / or the second indication information, it is determined whether to send the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, then according to the first indication information and / or the second indication information, it is determined whether to send the HARQ feedback information corresponding to the first PDSCH.

[0160] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information, including one or more of the following: if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for multicast / broadcast services, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information; if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for unicast services, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information; and if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information.

[0161] In some embodiments, the first PDSCH is a PDSCH for a multicast / broadcast service, including: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

[0162] In some embodiments, if the first group identifier includes G-RNTI, the second PDSCH is based on the first group identifier indication, including: the second PDSCH is scheduled based on the PDCCH encrypted by the G-RNTI; and / or if the first group identifier includes G-CS-RNTI, the second PDSCH is based on the first group identifier indication, including: the second PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

[0163] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication of the terminal device, then according to the first indication information and / or the second indication information, it is determined whether to send the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is the first transmitted PDSCH, then according to the second indication information, it is determined whether to send the HARQ feedback information corresponding to the first PDSCH.

[0164] In some embodiments, the first PDSCH is indicated based on the dedicated RNTI, including: the first PDSCH is scheduled based on a PDCCH scrambled by the dedicated RNTI.

[0165] In an optional embodiment, the first receiving unit 710 may be a transceiver 1030 , the first determining unit 720 may be a processor 1010 , and the terminal device 700 may further include a memory 1020 , as specifically shown in FIG10 .

[0166] 8 is a schematic structural diagram of a network device 800 provided in an embodiment of the present application. The network device 800 may include a first sending unit 810 and a second sending unit 820.

[0167] The first sending unit 810 is used to send first indication information and second indication information to a terminal device, wherein the terminal device includes a first group identifier and a first HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process.

[0168] The second sending unit 820 is used to send the first PDSCH associated with the first HARQ process to the terminal device; wherein the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0169] In some embodiments, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the first group identifier indication, the first indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH; or, if the first PDSCH is a PDSCH for multicast / broadcast services, the first indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0170] In some embodiments, if the first group identifier includes G-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is scheduled based on the PDCCH encrypted by the G-RNTI; and / or if the first group identifier includes G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

[0171] In some embodiments, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the dedicated RNTI indication of the terminal device, then the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0172] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, then the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0173] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including one or more of the following: if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for multicast / broadcast services, the first indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH; if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for unicast services, the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH; and if the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0174] In some embodiments, the first PDSCH is a PDSCH for a multicast / broadcast service, including: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

[0175] In some embodiments, if the first group identifier includes G-RNTI, the second PDSCH is based on the first group identifier indication, including: the second PDSCH is scheduled based on the PDCCH encrypted by the G-RNTI; and / or if the first group identifier includes G-CS-RNTI, the second PDSCH is based on the first group identifier indication, including: the second PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

[0176] In some embodiments, if the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: if the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is the initially transmitted PDSCH, then the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

[0177] In some embodiments, the first PDSCH is indicated based on the dedicated RNTI, including: the first PDSCH is scheduled based on a PDCCH scrambled by the dedicated RNTI.

[0178] In an optional embodiment, the first sending unit 810 and the second sending unit 820 may be transceivers 1030, and the network device 800 may further include a memory 1020 and a processor 1010, as specifically shown in FIG10 .

[0179] FIG9 is a schematic structural diagram of a terminal device 900 provided in an embodiment of the present application. The terminal device 900 may include: a second receiving unit 910, a first starting unit 920, and a second starting unit 930.

[0180] The second receiving unit 910 is used to receive first downlink data corresponding to the first HARQ process, where the first downlink data is indicated based on a first group identifier of the terminal device, and the first group identifier is configured with DRX.

[0181] The first starting unit 920 is used to start the first timer associated with the first HARQ process after the terminal device performs HARQ feedback for the first downlink data, wherein the timing duration of the first timer is determined based on the round-trip time between the terminal device and the network device, and the PDCCH is not monitored during the operation of the first timer.

[0182] The second starting unit 930 is configured to start a second timer associated with the first HARQ process if the first timer times out, wherein the PDCCH is monitored during the running of the second timer.

[0183] In some embodiments, the timing duration of the first timer is determined based on the timing duration of the third timer and the round-trip time; wherein, the third timer is a timer associated with the HARQ process, the third timer is associated with the point-to-multipoint transmission mode, and the PDCCH is not monitored during the operation of the third timer.

[0184] In some embodiments, the third timer is a downlink discontinuous reception drx-HARQ-RTT-TimerDL-PTM for point-to-multipoint transmission mode.

[0185] In some embodiments, the timing duration of the first timer is the sum of the timing duration of the third timer and the round-trip time.

[0186] In some embodiments, the first group identifier includes a G-RNTI and / or a G-CS-RNTI.

[0187] In some embodiments, the second timer is for drx-RetransmissionTimerDL-PTM.

[0188] In some embodiments, the terminal device starts a first timer associated with the first HARQ process, including: the terminal device starts the first timer at the first symbol after performing the HARQ feedback.

[0189] In some embodiments, if the first timer times out, starting the second timer associated with the first HARQ process includes: if the first timer times out, starting the second timer at the first symbol after the first timer times out.

[0190] In an optional embodiment, the second receiving unit 910 may be a transceiver 1030, and the first starting unit 920 or the second starting unit 930 may be a processor 1010. The terminal device 900 may further include a memory 1020, as specifically shown in FIG10 .

[0191] Figure 10 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 10 indicate that the unit or module is optional. The device 1000 may be used to implement the method described in the above method embodiment. The device 1000 may be a chip, a terminal device, or a network device.

[0192] The device 1000 may include one or more processors 1010. The processor 1010 may support the device 1000 to implement the method described in the method embodiment above. The processor 1010 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0193] The apparatus 1000 may further include one or more memories 1020. The memories 1020 store programs that can be executed by the processor 1010, causing the processor 1010 to perform the methods described in the above method embodiments. The memories 1020 may be independent of the processor 1010 or integrated into the processor 1010.

[0194] The apparatus 1000 may further include a transceiver 1030. The processor 1010 may communicate with other devices or chips via the transceiver 1030. For example, the processor 1010 may transmit and receive data with other devices or chips via the transceiver 1030.

[0195] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0196] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0197] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0198] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0199] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0200] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0201] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0202] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0203] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0204] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0205] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0206] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0207] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0208] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0209] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0210] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0211] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first indication information and second indication information, wherein the terminal device includes a first group identifier and a first hybrid automatic repeat request HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; The terminal device determines whether to send HARQ feedback information corresponding to a first physical downlink shared channel PDSCH according to the first indication information and / or the second indication information, wherein the first PDSCH is associated with the first HARQ process.

2. The method according to claim 1, characterized in that The terminal device determines, according to the first indication information and / or the second indication information, whether to send HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the first group identifier, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information; or, If the first PDSCH is a PDSCH for a multicast / broadcast service, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information.

3. The method according to claim 2, characterized in that: If the first group identifier includes a group radio network temporary identifier G-RNTI, the first PDSCH is indicated based on the first group identifier, including: the first PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes a group configuration scheduling radio network temporary identifier G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

4. The method according to any one of claims 1 to 3, characterized in that The terminal device determines, according to the first indication information and / or the second indication information, whether to send HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information.

5. The method according to claim 4, characterized in that If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the terminal device determines whether to send the HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information, including: If the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is a retransmitted PDSCH, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information.

6. The method according to claim 5, characterized in that If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information, including one or more of the following: If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a multicast / broadcast service, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information; If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a unicast service, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information; as well as If the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH based on the second indication information.

7. The method according to claim 6, characterized in that The first PDSCH is a PDSCH for multicast / broadcast services, and includes: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

8. The method according to claim 7, characterized in that: If the first group identifier includes a G-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes the G-CS-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is a PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

9. The method according to claim 4, characterized in that If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the terminal device determines whether to send the HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information, including: If the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is an initially transmitted PDSCH, the terminal device determines whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information.

10. The method according to any one of claims 4 to 9, characterized in that: The first PDSCH is based on the dedicated RNTI indication, including: the first PDSCH is scheduled based on the PDCCH scrambled by the dedicated RNTI.

11. A wireless communication method, characterized in that: include: The network device sends first indication information and second indication information to the terminal device, wherein the terminal device includes a first group identifier and a first hybrid automatic repeat request HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; The network device sends the first physical downlink shared channel PDSCH associated with the first HARQ process to the terminal device; wherein the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

12. The method according to claim 11, characterized in that The first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the first group identifier, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; or, If the first PDSCH is a PDSCH for a multicast / broadcast service, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

13. The method according to claim 12, characterized in that: If the first group identifier includes a group radio network temporary identifier G-RNTI, the first PDSCH is indicated based on the first group identifier, including: the first PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes a group configuration scheduling radio network temporary identifier G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

14. The method according to any one of claims 11 to 13, characterized in that The first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

15. The method according to claim 14, characterized in that If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

16. The method according to claim 15, characterized in that If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including one or more of the following: If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a multicast / broadcast service, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a unicast service, the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; as well as If the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, then the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

17. The method according to claim 16, characterized in that The first PDSCH is a PDSCH for multicast / broadcast services, and includes: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

18. The method according to claim 17, characterized in that: If the first group identifier includes a G-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes a G-CS-RNTI, the second PDSCH is indicated based on the first group identifier, including: The second PDSCH is a PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

19. The method according to claim 14, characterized in that If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is an initially transmitted PDSCH, the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

20. The method according to any one of claims 14 to 19, characterized in that The first PDSCH is based on the dedicated RNTI indication, including: the first PDSCH is scheduled based on the PDCCH scrambled by the dedicated RNTI.

21. A wireless communication method, characterized in that: include: The terminal device receives first downlink data corresponding to a first hybrid automatic repeat request HARQ process, where the first downlink data is indicated based on a first group identifier of the terminal device, and the first group identifier is configured with discontinuous reception DRX; After the terminal device performs HARQ feedback for the first downlink data, the terminal device starts a first timer associated with the first HARQ process, wherein the timing duration of the first timer is determined based on a round-trip time between the terminal device and the network device, and a physical downlink control channel PDCCH is not monitored during the operation of the first timer; If the first timer times out, the terminal device starts a second timer associated with the first HARQ process, wherein the PDCCH is monitored during the operation of the second timer.

22. The method according to claim 21, characterized in that The timing duration of the first timer is determined based on the timing duration of the third timer and the round-trip time; wherein the third timer is a timer associated with the HARQ process, the third timer is associated with the point-to-multipoint transmission mode, and the PDCCH is not monitored during the operation of the third timer.

23. The method according to claim 22, characterized in that The third timer is a downlink discontinuous reception hybrid automatic repeat request round trip time timer drx-HARQ-RTT-TimerDL-PTM for the point-to-multipoint transmission mode.

24. The method according to claim 22 or 23, characterized in that The timing duration of the first timer is the sum of the timing duration of the third timer and the round-trip time.

25. The method according to any one of claims 21 to 24, characterized in that The first group identifier includes a group radio network temporary identifier G-RNTI and / or a group configuration scheduling radio network temporary identifier G-CS-RNTI.

26. The method according to any one of claims 21 to 25, characterized in that The second timer is a downlink discontinuous reception retransmission timer drx-RetransmissionTimerDL-PTM for a point-to-multipoint transmission mode.

27. The method according to any one of claims 21 to 26, characterized in that The terminal device starts a first timer associated with the first HARQ process, including: The terminal device starts the first timer at the first symbol after performing the HARQ feedback.

28. The method according to any one of claims 21 to 27, characterized in that If the first timer times out, the terminal device starts a second timer associated with the first HARQ process, including: If the first timer times out, the terminal device starts the second timer at the first symbol after the first timer times out.

29. A terminal device, characterized in that: include: A first receiving unit, configured to receive first indication information and second indication information, wherein the terminal device includes a first group identifier and a first hybrid automatic repeat request HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; The first determining unit is used to determine whether to send HARQ feedback information corresponding to a first physical downlink shared channel PDSCH according to the first indication information and / or the second indication information, wherein the first PDSCH is associated with the first HARQ process.

30. The terminal device according to claim 29, characterized in that: The determining, according to the first indication information and / or the second indication information, whether to send HARQ feedback information corresponding to the first PDSCH includes: If the first PDSCH is indicated based on the first group identifier, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information; or, If the first PDSCH is a PDSCH for a multicast / broadcast service, it is determined whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information.

31. The terminal device according to claim 30, characterized in that: If the first group identifier includes a group radio network temporary identifier G-RNTI, the first PDSCH is indicated based on the first group identifier, including: the first PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes a group configuration scheduling radio network temporary identifier G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

32. The terminal device according to any one of claims 29 to 31, characterized in that: The determining, according to the first indication information and / or the second indication information, whether to send HARQ feedback information corresponding to the first PDSCH includes: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, it is determined whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information.

33. The terminal device according to claim 32, characterized in that: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information includes: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, it is determined whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information.

34. The terminal device according to claim 33, characterized in that: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information includes one or more of the following: If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a multicast / broadcast service, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information; If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a unicast service, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information; as well as If the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, it is determined whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information.

35. The terminal device according to claim 34, characterized in that: The first PDSCH is a PDSCH for multicast / broadcast services, and includes: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

36. The terminal device according to claim 35, characterized in that: If the first group identifier includes a G-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes the G-CS-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is a PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

37. The terminal device according to claim 32, characterized in that: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, determining whether to send HARQ feedback information corresponding to the first PDSCH according to the first indication information and / or the second indication information includes: If the first PDSCH is based on the dedicated RNTI indication and the first PDSCH is an initially transmitted PDSCH, it is determined whether to send HARQ feedback information corresponding to the first PDSCH according to the second indication information.

38. The terminal device according to any one of claims 32 to 37, characterized in that: The first PDSCH is based on the dedicated RNTI indication, including: the first PDSCH is scheduled based on the PDCCH scrambled by the dedicated RNTI.

39. A network device, characterized in that: include: A first sending unit, configured to send first indication information and second indication information to a terminal device, wherein the terminal device includes a first group identifier and a first hybrid automatic repeat request HARQ process, the first indication information is used to indicate whether HARQ feedback is enabled for the first group identifier, and the second indication information is used to indicate whether HARQ feedback is enabled for the first HARQ process; The second sending unit is used to send the first physical downlink shared channel PDSCH associated with the first HARQ process to the terminal device; wherein the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

40. The network device according to claim 39, characterized in that: The first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the first group identifier, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; or, If the first PDSCH is a PDSCH for a multicast / broadcast service, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

41. The network device according to claim 40, characterized in that: If the first group identifier includes a group radio network temporary identifier G-RNTI, the first PDSCH is indicated based on the first group identifier, including: the first PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes a group configuration scheduling radio network temporary identifier G-CS-RNTI, the first PDSCH is based on the first group identifier indication, including: the first PDSCH is the PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

42. The network device according to any one of claims 39 to 41, characterized in that: The first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH.

43. The network device according to claim 42, characterized in that: If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

44. The network device according to claim 43, characterized in that If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is a retransmitted PDSCH, the first indication information and / or the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH, including one or more of the following: If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a multicast / broadcast service, the first indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; If the first PDSCH is indicated based on the dedicated RNTI, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is a PDSCH for a unicast service, the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH; as well as If the first PDSCH is based on the dedicated RNTI indication, the first PDSCH is a retransmitted PDSCH, and the first PDSCH is not a PDSCH for multicast / broadcast services, then the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

45. The network device according to claim 44, characterized in that The first PDSCH is a PDSCH for multicast / broadcast services, and includes: a second PDSCH based on the first group identifier indication; wherein the second PDSCH is an initially transmitted PDSCH corresponding to the first PDSCH.

46. ​​The network device according to claim 45, characterized in that: If the first group identifier includes a G-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is scheduled based on a PDCCH scrambled by the G-RNTI; and / or If the first group identifier includes the G-CS-RNTI, the second PDSCH is indicated based on the first group identifier, including: the second PDSCH is a PDSCH corresponding to the configured downlink allocation, and the configured downlink allocation is associated with the G-CS-RNTI.

47. The network device according to claim 42, characterized in that If the first PDSCH is based on the dedicated RNTI indication of the terminal device, the first indication information and / or the second indication information is used to determine whether to transmit the HARQ feedback information corresponding to the first PDSCH, including: If the first PDSCH is indicated based on the dedicated RNTI and the first PDSCH is an initially transmitted PDSCH, the second indication information is used to determine whether to transmit HARQ feedback information corresponding to the first PDSCH.

48. The network device according to any one of claims 42 to 47, characterized in that: The first PDSCH is based on the dedicated RNTI indication, including: the first PDSCH is scheduled based on the PDCCH scrambled by the dedicated RNTI.

49. A terminal device, characterized in that: include: A second receiving unit, configured to receive first downlink data corresponding to a first hybrid automatic repeat request HARQ process, where the first downlink data is indicated based on a first group identifier of the terminal device, and the first group identifier is configured with discontinuous reception DRX; A first starting unit, configured to start a first timer associated with the first HARQ process after the terminal device performs HARQ feedback for the first downlink data, wherein the timing duration of the first timer is determined based on a round-trip time between the terminal device and the network device, and a physical downlink control channel PDCCH is not monitored during the operation of the first timer; The second starting unit is configured to start a second timer associated with the first HARQ process if the first timer times out, wherein the PDCCH is monitored during the operation of the second timer.

50. The terminal device according to claim 49, characterized in that: The timing duration of the first timer is determined based on the timing duration of the third timer and the round-trip time; wherein the third timer is a timer associated with the HARQ process, the third timer is associated with the point-to-multipoint transmission mode, and the PDCCH is not monitored during the operation of the third timer.

51. The terminal device according to claim 50, characterized in that: The third timer is a downlink discontinuous reception hybrid automatic repeat request round trip time timer drx-HARQ-RTT-TimerDL-PTM for the point-to-multipoint transmission mode.

52. The terminal device according to claim 50 or 51, characterized in that: The timing duration of the first timer is the sum of the timing duration of the third timer and the round-trip time.

53. The terminal device according to any one of claims 49 to 52, characterized in that: The first group identifier includes a G-RNTI and / or a G-CS-RNTI.

54. The terminal device according to any one of claims 49 to 53, characterized in that: The second timer is a downlink discontinuous reception retransmission timer drx-RetransmissionTimerDL-PTM for a point-to-multipoint transmission mode.

55. The terminal device according to any one of claims 49 to 54, characterized in that: The terminal device starts a first timer associated with the first HARQ process, including: The terminal device starts the first timer at the first symbol after performing the HARQ feedback.

56. The terminal device according to any one of claims 49 to 55, characterized in that: If the first timer times out, starting a second timer associated with the first HARQ process includes: If the first timer times out, the second timer is started at the first symbol after the first timer times out.

57. A terminal device, characterized in that: It comprises a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method as claimed in any one of claims 1 to 10 and claims 21 to 28.

58. A network device, characterized in that: The network device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the network device executes the method according to any one of claims 11 to 20.

59. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method as claimed in any one of claims 1 to 28.

60. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 28.

61. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 28.

62. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 28.

63. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 17.

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