WO2023102898A1

WO2023102898A1 - Retransmission mode determining method and apparatus, and timer control method and apparatus

Info

Publication number: WO2023102898A1
Application number: PCT/CN2021/137121
Authority: WO
Inventors: 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2023-06-15

Abstract

Embodiments of the present application provide a retransmission mode determining method and apparatus, a timer control method and apparatus, a terminal device, and a network device. The method comprises: a terminal device receives first signaling sent by a network device, wherein the first signaling is used for indicating whether a data retransmission mode is a first retransmission mode or a second retransmission mode, the first retransmission mode means that data retransmission is scheduled on the basis of DCI scrambled by a first RNTI, wherein the first RNTI is a G-RNTI or a G-CS-RNTI; the second retransmission mode means that data retransmission is scheduled on the basis of DCI scrambled by a second RNTI, wherein the second RNTI is a C-RNTI or a CS-RNTI.

Description

Method for determining retransmission mode and method and device for controlling timer

technical field

The embodiment of the present application relates to the technical field of mobile communication, and specifically relates to a method for determining a retransmission mode and a method for controlling a timer, a device, a terminal device, and a network device.

Background technique

In the New Radio (NR) system, many scenarios need to support multicast and broadcast business requirements, such as in the Internet of Vehicles and the Industrial Internet. Therefore, it is necessary to introduce multicast-type and broadcast-type Multimedia Broadcast Service (MBS) services in NR.

For the multicast type MBS service (abbreviated as MBS multicast service), it is necessary to perform Hybrid Automatic Repeat reQuest (HARQ) feedback and retransmission scheduling. At present, it is not clear how to configure the retransmission scheduling mode (referred to as the retransmission mode for short) for the MBS service, which causes the terminal device to fail to receive the retransmission scheduling normally.

Contents of the invention

Embodiments of the present application provide a method for determining a retransmission mode and a method for controlling a timer, a device, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.

The method for determining the retransmission mode provided in the embodiment of the present application includes:

The terminal device receives the first signaling sent by the network device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission mode refers to: the retransmission of data is scheduled based on downlink control information (Downlink Control Information, DCI) scrambled by the first Radio Network Tempory Identity (RNTI), and the first RNTI For group-radio network temporary identification (Group-RNTI, G-RNTI) or group-configuration scheduling-radio network temporary identification (Group-Configured Scheduling-RNTI, G-CS-RNTI);

The second retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a cell-radio network temporary identifier (Cell-RNTI, C-RNTI) or configuration scheduling- Wireless network temporary identifier (Configured Scheduling-RNTI, CS-RNTI).

The timer control method provided in the embodiment of the present application, the method includes:

The terminal device receives the DCI scrambled by the first RNTI sent by the network device, where the first RNTI is a G-RNTI or a G-CS-RNTI;

The terminal device receives the data scheduled by the DCI, and starts a first Discontinuous Reception (DRX) Round Trip Time (Round Trip Time, RTT) timer associated with the first RNTI.

The method for determining the retransmission mode provided in the embodiment of the present application, the method includes:

The network device sends the first signaling to the terminal device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is G-RNTI or G-CS-RNTI;

The second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a C-RNTI or a CS-RNTI.

The device for determining a retransmission mode provided in the embodiment of the present application is applied to a terminal device, and the device includes:

The receiving unit is configured to receive the first signaling sent by the network device, the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The timer control device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

A receiving unit, configured to receive DCI scrambled by a first RNTI sent by a network device, where the first RNTI is G-RNTI or G-CS-RNTI; receive data scheduled by the DCI;

A control unit, configured to start a first DRX RTT timer associated with the first RNTI.

The device for determining a retransmission mode provided in the embodiment of the present application is applied to a network device, and the device includes:

A sending unit, configured to send first signaling to the terminal device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The terminal device provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above method for determining the retransmission mode.

The network device provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above method for determining the retransmission mode.

The chip provided in the embodiment of the present application is used to implement the method for determining the retransmission mode described above.

Specifically, the chip includes: a processor, configured to invoke and run a computer program from the memory, so that the device installed with the chip executes the above method for determining the retransmission mode.

The computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program causes a computer to execute the above-mentioned method for determining a retransmission mode.

The computer program product provided by the embodiments of the present application includes computer program instructions, and the computer program instructions cause a computer to execute the above-mentioned method for determining a retransmission mode.

The computer program provided in the embodiment of the present application, when running on a computer, enables the computer to execute the above-mentioned method for determining a retransmission manner.

Through the above technical solution, it is clarified that in the process of receiving the MBS service, the retransmission mode of the MBS service is indicated semi-statically through RRC signaling, or the retransmission mode of the MBS service is dynamically changed through DCI, wherein the retransmission mode can be the first The first retransmission mode (that is, the multicast retransmission mode) or the second retransmission mode (that is, the unicast retransmission mode) enables the terminal device to normally receive the retransmission scheduling of the MBS service.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application;

Fig. 2 is the schematic diagram of the protocol stack corresponding to the PTM mode and the PTP mode of the embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for determining a retransmission mode provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of a timer control method provided in an embodiment of the present application;

FIG. 5 is a first structural diagram of an apparatus for determining a retransmission mode provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of the structure and composition of the timer control device provided by the embodiment of the present application;

FIG. 7 is a second structural diagram of the device for determining the retransmission mode provided by the embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a chip according to an embodiment of the present application;

Fig. 10 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

As shown in FIG. 1 , a communication system 100 may include a terminal device 110 and a network device 120 . The network device 120 can communicate with the terminal device 110 through the air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120 .

It should be understood that the embodiment of the present application is only described by using the communication system 100 as an example, but the embodiment of the present application is not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Communication System (Universal Mobile Telecommunication System, UMTS), Internet of Things (Internet of Things, IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

In the communication system 100 shown in FIG. 1 , the network device 120 may be an access network device that communicates with the terminal device 110 . The access network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices 110 (such as UEs) located in the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long-term evolution (Long Term Evolution, LTE) system, or a next-generation radio access network (Next Generation Radio Access Network, NG RAN) device, Either a base station (gNB) in the NR system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 can be a relay station, an access point, a vehicle-mounted device, a wearable Devices, hubs, switches, bridges, routers, or network devices in the future evolution of the Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.

The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wirelessly.

For example, the terminal equipment 110 may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, user agent, or user device. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, IoT devices, satellite handheld terminals, Wireless Local Loop (WLL) stations, Personal Digital Assistant , PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolution networks, etc.

The terminal device 110 can be used for device-to-device (Device to Device, D2D) communication.

The wireless communication system 100 may also include a core network device 130 that communicates with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, for example, Access and Mobility Management Function (Access and Mobility Management Function , AMF), and for example, authentication server function (Authentication Server Function, AUSF), and for example, user plane function (User Plane Function, UPF), and for example, session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example, a data gateway (Session Management Function+Core Packet Gateway, SMF+PGW- C) Equipment. It should be understood that SMF+PGW-C can realize the functions of SMF and PGW-C at the same time. In the process of network evolution, the above-mentioned core network equipment may be called by other names, or a new network entity may be formed by dividing functions of the core network, which is not limited in this embodiment of the present application.

Various functional units in the communication system 100 may also establish a connection through a next generation network (next generation, NG) interface to implement communication.

For example, the terminal device establishes an air interface connection with the access network device through the NR interface to transmit user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); access Network equipment such as the next generation wireless access base station (gNB), can establish a user plane data connection with UPF through NG interface 3 (abbreviated as N3); access network equipment can establish control plane signaling with AMF through NG interface 2 (abbreviated as N2) connection; UPF can establish a control plane signaling connection with SMF through NG interface 4 (abbreviated as N4); UPF can exchange user plane data with the data network through NG interface 6 (abbreviated as N6); AMF can communicate with SMF through NG interface 11 (abbreviated as N11) The SMF establishes a control plane signaling connection; the SMF may establish a control plane signaling connection with the PCF through an NG interface 7 (N7 for short).

Figure 1 exemplarily shows a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include other numbers of terminals within the coverage area. The device is not limited in the embodiment of this application.

It should be noted that FIG. 1 is only an illustration of a system applicable to this application, and of course, the method shown in the embodiment of this application may also be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation. It should also be understood that the "correspondence" mentioned in the embodiments of the present application may mean that there is a direct correspondence or an indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated. , configuration and configured relationship. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be used by pre-saving corresponding codes, tables or other It is implemented by indicating related information, and this application does not limit the specific implementation. For example, pre-defined may refer to defined in the protocol. It should also be understood that in the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, and this application does not limit this .

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them belong to the embodiments of the present application. protected range.

With people's pursuit of speed, delay, high-speed mobility, energy efficiency and the diversity and complexity of business in future life, the ^3rd Generation Partnership Project (3GPP) international standards organization began to develop 5G . The main application scenarios of 5G are: Enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), Massive Machine-Type Communications (mMTC) ).

On the one hand, eMBB still aims at users obtaining multimedia content, services and data, and its demand is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoors, urban areas, and rural areas, the capabilities and requirements vary greatly, so it cannot be generalized, and detailed analysis must be combined with specific deployment scenarios. Typical applications of URLLC include: industrial automation, electric power automation, telemedicine operations (surgery), traffic safety guarantee, etc. The typical characteristics of mMTC include: high connection density, small data volume, delay-insensitive services, low cost and long service life of modules, etc.

MBMS

MBMS is a technology that transmits data from one data source to multiple terminal devices by sharing network resources. This technology can effectively use network resources while providing multimedia services, and realize broadcasting of multimedia services at a higher rate (such as 256kbps) and multicast.

Due to the low spectrum efficiency of MBMS, it is not enough to effectively carry and support the operation of mobile TV services. Therefore, in LTE, 3GPP clearly proposed to enhance the ability to support downlink high-speed MBMS services, and determined the design requirements for the physical layer and air interface.

3GPP R9 introduces evolved MBMS (evolved MBMS, eMBMS) into LTE. eMBMS proposes the concept of Single Frequency Network (SFN), that is, Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN). MBSFN uses a unified frequency to transmit service data in all cells at the same time, but To ensure the synchronization between cells. This method can greatly improve the overall signal-to-noise ratio distribution of the cell, and the spectrum efficiency will also be greatly improved accordingly. eMBMS implements broadcast and multicast of services based on the IP multicast protocol.

In LTE or LTE-Advanced (LTE-Advanced, LTE-A), MBMS only has a broadcast bearer mode, but no multicast bearer mode. In addition, the reception of MBMS service is applicable to terminal equipments in idle state or connected state.

3GPP R13 introduced the concept of Single Cell Point To Multiploint (SC-PTM), and SC-PTM is based on the MBMS network architecture.

MBMS introduces new logical channels, including Single Cell-Multicast Control Channel (Single Cell-Multicast Control Channel, SC-MCCH) and Single Cell-Multicast Transport Channel (Single Cell-Multicast Transport Channel, SC-MTCH). SC-MCCH and SC-MTCH are mapped to the downlink shared channel (Downlink-Shared Channel, DL-SCH), and further, DL-SCH is mapped to the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), wherein, SC - MCCH and SC-MTCH belong to logical channels, DL-SCH belongs to transport channels, and PDSCH belongs to physical channels. SC-MCCH and SC-MTCH do not support Hybrid Automatic Repeat reQuest (HARQ) operation.

MBMS introduces a new system information block (System Information Block, SIB) type, namely SIB20. Specifically, SIB20 is used to transmit SC-MCCH configuration information, and one cell has only one SC-MCCH. The SC-MCCH configuration information includes: SC-MCCH modification period, SC-MCCH repetition period, and information such as radio frames and subframes for scheduling SC-MCCH. Further, 1) the boundary of the modification period of SC-MCCH satisfies SFN mod m=0, wherein, SFN represents the system frame number of the boundary, and m is the modification period (ie sc-mcch-ModificationPeriod) of the SC-MCCH configured in SIB20. 2) Scheduling the wireless frame of SC-MCCH satisfies: SFN mod mcch-RepetitionPeriod=mcch-Offset, wherein, SFN represents the system frame number of the wireless frame, mcch-RepetitionPeriod represents the repetition period of SC-MCCH, and mcch-Offset represents SC-MCCH offset. 3) The subframe for scheduling the SC-MCCH is indicated by sc-mcch-Subframe.

The SC-MCCH is scheduled through a Physical Downlink Control Channel (PDCCH). On the one hand, a new radio network temporary identity (Radio Network Tempory Identity, RNTI), that is, a single cell RNTI (Single Cell RNTI, SC-RNTI) is introduced to identify the PDCCH (such as SC-MCCH PDCCH) used to schedule the SC-MCCH, Optionally, the fixed value of SC-RNTI is FFFC. On the other hand, a new RNTI is introduced, that is, a single cell notification RNTI (Single Cell Notification RNTI, SC-N-RNTI) to identify the PDCCH used to indicate the change notification of the SC-MCCH (such as notifying the PDCCH). Optionally, the SC The fixed value of -N-RNTI is FFFB; further, one of the 8 bits (bits) of DCI 1C can be used to indicate the change notification. In LTE, SC-PTM configuration information is based on SC-MCCH configured by SIB20, and then SC-MCCH configures SC-MTCH, and SC-MTCH is used to transmit service data.

Specifically, the SC-MCCH only transmits one message (that is, SCPTMConfiguration), which is used to configure configuration information of the SC-PTM. The configuration information of SC-PTM includes: temporary mobile group identity (Temporary Mobile Group Identity, TMGI), session identification (seession id), group RNTI (Group RNTI, G-RNTI), discontinuous reception (Discontinuous Reception, DRX) configuration information And the SC-PTM service information of the neighboring cell, etc. It should be noted that SC-PTM in R13 does not support Robust Header Compression (Robust Header Compression, ROHC) function.

The downlink discontinuous reception of SC-PTM is controlled by the following parameters: onDurationTimerSCPTM, drx-InactivityTimerSCPTM, SC-MTCH-SchedulingCycle, and SC-MTCH-SchedulingOffset.

When [(SFN*10)+subframe number]modulo(SC-MTCH-SchedulingCycle)=SC-MTCH-SchedulingOffset is satisfied, start the timer onDurationTimerSCPTM;

When receiving downlink PDCCH scheduling, start the timer drx-InactivityTimerSCPTM;

The downlink SC-PTM service is received only when the timer onDurationTimerSCPTM or drx-InactivityTimerSCPTM is running.

SC-PTM business continuity adopts the concept of MBMS business continuity based on SIB15, that is, "SIB15+MBMSInterestIndication" mode. The service continuity of terminal equipment in idle state is based on the concept of frequency priority.

In the technical solution of the embodiment of the present application, a new SIB (called the first SIB) is defined, and the first SIB includes the configuration information of the first MCCH. Here, the first MCCH is the control channel of the MBMS service. In other words, the first SIB includes the configuration information of the first MCCH. One SIB is used to configure the configuration information of the NR MBMS control channel. Optionally, the NR MBMS control channel may also be called NR MCCH (that is, the first MCCH).

Further, the first MCCH is used to carry the first signaling. The embodiment of the present application does not limit the name of the first signaling. For example, the first signaling is signaling A, and the first signaling includes at least one first MTCH configuration information, here, the first MTCH is a traffic channel (also referred to as a data channel or a transmission channel) of the MBMS service, and the first MTCH is used to transmit MBMS service data (such as NR MBMS service data). In other words, the first MCCH is used to configure the configuration information of the traffic channel of NR MBMS. Optionally, the traffic channel of NR MBMS may also be called NR MTCH (that is, the first MTCH).

Specifically, the first signaling is used to configure an NR MBMS traffic channel, service information corresponding to the traffic channel, and scheduling information corresponding to the traffic channel. Further, optionally, the service information corresponding to the service channel, such as TMGI, session id and other identification information for identifying services. The scheduling information corresponding to the traffic channel, for example, the RNTI used when the MBMS service data corresponding to the traffic channel is scheduled, such as G-RNTI, DRX configuration information, and the like.

It should be noted that both the transmission of the first MCCH and the first MTCH are scheduled based on the PDCCH. Wherein, the RNTI used by the PDCCH for scheduling the first MCCH uses a network-wide unique identifier, that is, a fixed value. The RNTI used by the PDCCH for scheduling the first MTCH is configured through the first MCCH.

It should be noted that, in this embodiment of the present application, there is no restriction on naming of the first SIB, the first MCCH, and the first MTCH. For ease of description, the first SIB can also be referred to as the SIB for short, the first MCCH can also be referred to as the MCCH for short, and the first MTCH can also be referred to as the MTCH for short, and the PDCCH (ie, the MCCH PDCCH) configured to schedule the MCCH is configured by the SIB. ) and notify the PDCCH, wherein, the PDSCH (ie MCCH PDSCH) used to transmit the MCCH is scheduled by the DCI carried by the MCCH PDCCH. Further, configure M PDCCHs for scheduling MTCH (i.e. MTCH 1PDCCH, MTCH 2 PDCCH, ..., MTCH M PDCCH) through MCCH, wherein, the DCI scheduling carried by MTCH n PDCCH is used to transmit the PDSCH of MTCH n (i.e. MTCH n PDSCH ), n is an integer greater than or equal to 1 and less than or equal to M. MCCH and MTCH are mapped to DL-SCH, and further, DL-SCH is mapped to PDSCH, wherein MCCH and MTCH belong to logical channels, DL-SCH belongs to transport channel, and PDSCH belongs to physical channel.

It should be noted that although the foregoing solution is described using MBMS as an example, the description of "MBMS" may also be replaced with "MBS". The embodiment of the present application uses MBS as an example for description, and the description of "MBS" may also be replaced with "MBMS".

In the NR system, many scenarios need to support multicast and broadcast business requirements, such as in the Internet of Vehicles and the Industrial Internet. So it is necessary to introduce multicast and broadcast MBS services in NR. It should be noted that the multicast-type MBS service refers to the MBS service transmitted in a multicast manner. The broadcast-type MBS service refers to the MBS service transmitted by broadcasting.

In the NR system, for the multicast type MBS service, the MBS service is sent to all terminal devices in a certain group. The terminal device receives the multicast type MBS service in the RRC connection state, and the terminal device can receive the multicast type in the point-to-multipoint (Point-To-Multipoint, PTM) mode or point-to-point (Point-To-Point, PTP) mode MBS business data. Wherein, referring to FIG. 2 , the MBS service data in the PTM mode scrambles the corresponding scheduling information through the G-RNTI configured on the network side, and the MBS service data in the PTP mode scrambles the corresponding scheduling information through the C-RNTI.

For the multicast MBS service, after receiving the MBS service delivered by the core network from the shared tunnel (tunnel), the base station can deliver the MBS service to all terminal devices in a group through the air interface. Here, the base station may deliver the MBS service to all terminal devices in a group through PTP and/or PTM. For example: a group includes Terminal 1, Terminal 2, and Terminal 3. The base station can deliver the MBS service to Terminal 1 through PTP, deliver the MBS service to Terminal 2 through PTP, and deliver the MBS The service is delivered to terminal equipment 3; or, the base station can deliver the MBS service to terminal equipment 1 through PTP, and the MBS service can be delivered to terminal equipment 2 and terminal equipment 3 through PTM; or, the base station can deliver the MBS service to terminal equipment 3 through PTM. The MBS service is delivered to terminal device 1, terminal device 2 and terminal device 3. A shared GTP tunnel (Shared GTP tunnel) is used between the core network and the base station to transmit the MBS service, that is, both the PTM MBS service and the PTP MBS service share the GTP tunnel. The base station delivers MBS service data to UE1 and UE2 in a PTM manner, and delivers MBS service data to UE3 in a PTP manner.

For the multicast type MBS service (abbreviated as MBS multicast service), a DRX mechanism is introduced to save energy for terminal equipment. For ease of distinction, the DRX used for receiving MBS multicast services is called MBS DRX (or multicast DRX (multicast DRX)), and the DRX used for receiving traditional unicast services is called unicast DRX, MBS DRX and unicast DRX Broadcasting DRX is independent of each other. As an example, the parameters related to MBS DRX can refer to the following Table 1. The network side can configure the parameters shown in Table 1 through RRC signaling, so as to control the MBS DRX operation through these parameters. It should be noted that MBS DRX is per G -RNTI or per G-CS-RNTI configuration. For terminal equipment, the DRX activation time includes the running time of the following timers: drx-onDurationTimerPTM, drx-InactivityTimerPTM, drx-RetransmissionTimer-DL-PTM.

Table 1

On the one hand, in the process of MBS service transmission, there is HARQ feedback for PTM transmission, and the mode of HARQ feedback includes HARQ feedback mode based on negative acknowledgment only (NACK only) and HARQ feedback based on positive acknowledgment/negative acknowledgment (ACK/NACK) model. The feedback mode of the MBS service can be configured through RRC signaling, and is configured per G-RNTI or per G-CS-RNTI.

On the other hand, in the process of MBS service transmission, there is a scenario where PTP is used for PTM retransmission, that is, a transport block (Transport Block, TB) of MBS service, and the network side uses PTM mode (that is, the scheduling corresponding to G-RNTI scrambling information) for initial transmission (referred to as initial transmission), if the terminal device fails to receive a negative acknowledgment (NACK), the network side uses the PTP method (that is, the scheduling information corresponding to C-RNTI scrambling) for retransmission (referred to as retransmission ). At this time, the initial transmission in the PTM mode and the retransmission in the PTP mode correspond to the same HARQ process identifier and New Data Indication (New Data Indication, NDI), that is, the HARQ process identifier and NDI carried in the scheduling signaling of the initial transmission, and the retransmission The HARQ process identifier carried in the transmitted scheduling signaling is the same as the NDI.

During the transmission of the MBS service, it is not clear how to configure the retransmission scheduling mode for the MBS service (referred to as the retransmission mode for short), which causes the terminal device to fail to receive the retransmission scheduling normally. To this end, the following technical solutions of the embodiments of the present application are proposed.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific examples. As optional solutions, the above related technologies may be combined with the technical solutions of the embodiments of the present application in any combination, and all of them belong to the protection scope of the embodiments of the present application. The embodiment of the present application includes at least part of the following contents.

Fig. 3 is a schematic flowchart of a method for determining a retransmission mode provided in an embodiment of the present application. As shown in Fig. 3 , the method for determining a retransmission mode includes the following steps:

Step 301: The terminal device receives the first signaling sent by the network device, the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein the first retransmission mode The mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is G-RNTI or G-CS-RNTI; the second retransmission mode refers to: the retransmission of data is based on The DCI scrambled by the second RNTI is scheduled, and the second RNTI is a C-RNTI or a CS-RNTI.

In the embodiment of the present application, the network device sends the first signaling to the device, and accordingly, the terminal device receives the first signaling sent by the network device. Here, optionally, the network device may be a base station. Wherein, the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode.

Here, the first retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is a G-RNTI or a G-CS-RNTI. Specifically, the retransmission of MBS service data (that is, MBS TB) can be scheduled by scrambling DCI through the first RNTI.

Here, the second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a C-RNTI or a CS-RNTI. Specifically, the retransmission of MBS service data (that is, MBS TB) can be scheduled by scrambling DCI through the second RNTI.

In some optional implementation manners, the first retransmission mode means that the retransmission of data is scheduled based on the DCI scrambled by the G-RNTI, and this retransmission mode may also be called a multicast retransmission mode. The second retransmission mode means that the retransmission of data is scheduled based on the DCI scrambled by the C-RNTI, and this retransmission mode may also be called a unicast retransmission mode.

In some optional implementation manners, the first retransmission method means that the retransmission of data is scheduled based on the DCI scrambled by G-CS-RNTI. This retransmission method can also be called multicast SPS retransmission mode (that is, MBS SPS retransmission mode). The second retransmission mode means that the retransmission of data is scheduled based on DCI scrambled by the CS-RNTI, and this retransmission mode may also be called a unicast SPS retransmission mode.

Option A

In some optional implementation manners, the first signaling is RRC signaling. Specifically, the RRC signaling carries first indication information, and the first indication information is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode.

Option B

In some optional implementation manners, the first signaling is DCI, and the DCI is scrambled by the first RNTI.

In some optional implementation manners, the DCI is a newly transmitted scheduling DCI or a Semi-Persistent Scheduling (Semi-Persistent Scheduling, SPS) activation instruction, and the DCI carries second indication information, and the second indication information is used to indicate the current The data retransmission mode is the first retransmission mode or the second retransmission mode.

In some optional implementation manners, the DCI is a new transmission scheduling DCI or a retransmission scheduling DCI or an SPS activation instruction, and the DCI carries third indication information, and the third indication information is used to indicate the next retransmission of the current data. The retransmission mode of the transmitted data is the first retransmission mode or the second retransmission mode.

In some optional implementation manners, before the terminal device receives the DCI, the method further includes: the network device sends RRC signaling to the terminal device, and correspondingly, the terminal device receives the Sending RRC signaling, where the RRC signaling carries configuration information associated with the first RNTI, and the configuration information is used to configure whether to control data retransmission mode through DCI. Further, if the configuration information in the RRC signaling is configured to control data retransmission through DCI, the terminal device receives the DCI, and the DCI carries the second indication information or the third indication information To control the retransmission mode of data.

In the above solution, the retransmission mode can be dynamically changed through the DCI, which is beneficial for the network to adjust the retransmission mode in time according to the channel conditions.

In the embodiment of the present application, it is clarified how different retransmission modes affect the DRX operation. It is explained below.

It should be noted that the DRX operation-related timers involved in the following solutions include DRX RTT timer and DRX retransmission timer. Wherein, the DRX RTT timer is divided into a first DRX RTT timer and a second DRX RTT timer, where the first DRX RTT timer refers to the DRX RTT timer associated with the first RNTI (that is, the multicast DRX RTT timer device), the second DRX RTT timer refers to the DRX RTT timer associated with the second RNTI (that is, the unicast DRX RTT timer). Similarly, the DRX retransmission timer is divided into a first DRX retransmission timer and a second DRX retransmission timer, where the first DRX retransmission timer refers to the DRX retransmission timer associated with the first RNTI (that is, multicast DRX retransmission timer), the second DRX retransmission timer refers to the DRX retransmission timer associated with the second RNTI (that is, the unicast DRX retransmission timer). As an example, the first DRX RTT timer may be called drx-HARQ-RTT-Timer-DL-PTM, and the first DRX retransmission timer may be called drx-RetransmissionTimer-DL-PTM. As an example, the second DRX RTT timer may be called drx-HARQ-RTT-TimerDL, and the second DRX retransmission timer may be called drx-RetransmissionTimerDL.

Option One

In some optional implementation manners, the retransmission mode indicated by the first signaling is the first retransmission mode, that is, the retransmission mode indicated by the first signaling is a multicast retransmission mode or a multicast SPS retransmission method. In this case, the influence of the DRX operation has the following situations.

Case 1-1) After receiving the first data, the terminal device performs HARQ feedback for the first data, and starts the first DRX RTT timer associated with the first RNTI. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.

Situation 1-2) After receiving the first data and successfully receiving the first data, the terminal device does not perform HARQ feedback for the first data, and the terminal device starts the first RNTI associated with the first RNTI. DRX RTT timer. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

Further, in some optional implementation manners, for the above case 1-1) and case 1-2), if the first DRX RTT timer expires, the data associated with the first DRX RTT timer If the decoding fails, the terminal device starts a first DRX retransmission timer associated with the first RNTI.

Option II

In some optional implementation manners, the retransmission mode indicated by the first signaling is the second retransmission mode, that is, the retransmission mode indicated by the first signaling is a unicast retransmission mode or a unicast SPS retransmission method. In this case, the influence of the DRX operation has the following situations.

Case 2-1) After receiving the first data, the terminal device performs HARQ feedback for the first data, and starts the second DRX RTT timer associated with the second RNTI. In some optional implementation manners, the start time of the second DRX RTT timer is the first symbol after the HARQ feedback ends.

Situation 2-2) After the terminal device completes receiving the first data and successfully receives the first data, it does not perform HARQ feedback for the first data, and the terminal device starts the second RNTI associated DRX RTT timer. In some optional implementation manners, the start time of the second DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

Further, in some optional implementation manners, for the above case 2-1) and case 2-2), if the second DRX RTT timer expires, the data associated with the second DRX RTT timer If the decoding fails, the terminal device starts a second DRX retransmission timer associated with the second RNTI.

Case 2-3) After receiving the first data, the terminal device performs HARQ feedback for the first data, and starts the first DRX RTT timer associated with the first RNTI. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.

Situation 2-4) After the terminal device completes receiving the first data and successfully receives the first data, it does not perform HARQ feedback for the first data, and the terminal device starts the first RNTI associated with the first RNTI. DRX RTT timer. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

Further, in some optional implementation manners, for the above case 2-3) and case 2-4), if the first DRX RTT timer expires, the data associated with the first DRX RTT timer In the case of a decoding failure, the terminal device starts a second DRX retransmission timer associated with the second RNTI, and monitors the PDCCH scrambled by the second RNTI during the operation of the second DRX retransmission timer; Or, if the first DRX RTT timer expires, if the decoding of the data associated with the first DRX RTT timer fails or whether the decoding succeeds or fails, the terminal device starts the data associated with the first RNTI a first DRX retransmission timer, and monitor the PDCCH scrambled by the second RNTI during the running period of the first DRX retransmission timer.

It should be noted that the above-mentioned scheme A, scheme B, scheme 1, and scheme 2 of the embodiment of the present application can be implemented separately, or the above-mentioned scheme A can be implemented in combination with the above-mentioned scheme 1 and/or scheme 2, or can also be The above-mentioned scheme B is implemented in combination with the above-mentioned scheme 1 and/or scheme 2.

In some optional implementation manners, the above-mentioned scheme A is implemented in combination with the above-mentioned scheme 1 and/or scheme 2. For this case, that is, when the first signaling is RRC signaling, the first The data is data indicated by the second signaling; the method further includes: the terminal device receives the second signaling, and receives the first data based on the second signaling. In some optional implementation manners, the second signaling is MBS dynamic scheduling DCI or MBS retransmission scheduling DCI or MBS SPS authorization.

In some optional implementation manners, the above-mentioned scheme B is implemented in combination with the above-mentioned scheme 1 and/or scheme 2. For this case, that is, when the first signaling is DCI, the first data is The DCI dispatch data. The method further includes: the terminal device receiving the first data based on the DCI.

Fig. 4 is a schematic flowchart of a timer control method provided in an embodiment of the present application. As shown in Fig. 4, the timer control method includes the following steps:

Step 401: The terminal device receives the DCI scrambled by the first RNTI sent by the network device, where the first RNTI is a G-RNTI or a G-CS-RNTI.

Step 402: The terminal device receives the data scheduled by the DCI, and starts the first DRX RTT timer associated with the first RNTI.

In the embodiment of the present application, the network device can change the retransmission mode autonomously and implicitly notify the terminal device. Alternatively, when the network device does not notify the terminal device to change the retransmission mode, the network device and the terminal device default to a retransmission mode. Here, the retransmission mode may be the first retransmission mode or the second retransmission mode, and for an understanding of the first retransmission mode and the second retransmission mode, reference may be made to the foregoing related solutions.

Case 1) After receiving the data that has completed the DCI scheduling, the terminal device performs HARQ feedback for the data, and starts the first DRX RTT timer associated with the first RNTI. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.

Case II) After the terminal device receives the data that has completed the DCI scheduling and successfully receives the data, it does not perform HARQ feedback for the data, and the terminal device starts the first DRX RTT timer associated with the first RNTI. In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

For the above case I) and case II), if the first DRX RTT timer expires, if the decoding of the data associated with the first DRX RTT timer fails or whether the decoding succeeds or fails, the The terminal device starts the first DRX retransmission timer associated with the first RNTI, and monitors the PDCCH scrambled by the first RNTI and the PDCCH scrambled by the second RNTI during the operation of the first DRX retransmission timer, The second RNTI is a C-RNTI or a CS-RNTI.

The technical solutions of the embodiments of the present application are illustrated below in conjunction with specific application examples.

Application example one

The network device configures the configuration information of MBS service transmission for the terminal device through RRC signaling, such as including TMGI, G-RNTI or G-CS-RNTI, common frequency domain location for MBS reception, HARQ feedback mode, data retransmission mode, etc. . Wherein, the HARQ feedback mode may be, for example, only a negative acknowledgment feedback mode (NACK only based HARQ feedback), or an ACK/NACK feedback mode (ACK/NACK based HARQ feedback).

Wherein, the data retransmission manner may be the first retransmission manner or the second retransmission manner. The first retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is a G-RNTI or a G-CS-RNTI. Specifically, the retransmission of MBS service data (that is, MBS TB) can be scheduled by scrambling DCI through the first RNTI. The second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is the second RNTI or the CS-RNTI. Specifically, the retransmission of MBS service data (that is, MBS TB) can be scheduled by scrambling DCI through the second RNTI.

Here, optionally, if the RRC signaling does not configure the data retransmission mode, the default data retransmission mode is the first retransmission mode.

2. The terminal device receives MBS dynamic scheduling DCI or MBS retransmission scheduling DCI or MBS SPS authorization, and receives MBS service data based on the received signaling.

In some optional implementation manners, the RRC signaling indicates the first retransmission mode (that is, retransmission scheduling based on the first RNTI scrambled DCI), for this case:

Situation 1-1) If the terminal device receives and completes the MBS service data and feeds back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the first RNTI, wherein the start of the timer starts Time is the first symbol after the HARQ feedback is transmitted.

Situation 1-2) If the terminal device receives and completes the MBS service data and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the first RNTI, the The start time of the timer start is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 1-1) and case 1-2), after the DRX RTT timer associated with the first RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the first RNTI.

In some optional implementation manners, the DCI scrambled by the first RNTI indicates the second retransmission mode (that is, retransmission scheduling is performed based on the second RNTI scrambled DCI), for this case:

Case 2-1) If the terminal device receives and completes the MBS service data and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the second RNTI, and the start time of the timer is when the transmission is completed The first symbol after HARQ feedback.

Case 2-2) If the terminal device receives and completes the MBS service data and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the second RNTI, and the timer The start time of activation is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-1) and case 2-2), after the DRX RTT timer associated with the second RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the second RNTI.

Situation 2-3) If the terminal device receives and completes the MBS service data and feeds back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the first RNTI, and the start time of the timer is when the transmission is completed The first symbol after HARQ feedback.

Situation 2-4) If the terminal device receives and completes the MBS service data and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the first RNTI, and the timer The start time of activation is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-3) and case 2-4), after the DRX RTT timer associated with the first RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the second RNTI; The terminal device monitors the PDCCH scrambled by the second RNTI while the DRX retransmission timer associated with the second RNTI is running. Or, after the DRX RTT timer associated with the first RNTI expires, if the corresponding data decoding fails, or whether the decoding succeeds or fails, the terminal device starts the DRX retransmission timer associated with the first RNTI; During the operation of the DRX retransmission timer associated with the RNTI, the PDCCH scrambled by the second RNTI is monitored.

Application example two

1. The network device configures the configuration information of MBS service transmission for the terminal device through RRC signaling, such as including TMGI, G-RNTI, common frequency domain location for MBS reception, HARQ feedback mode, data retransmission mode, etc. Wherein, the HARQ feedback mode may be, for example, only a negative acknowledgment feedback mode (NACK only based HARQ feedback), or an ACK/NACK feedback mode (ACK/NACK based HARQ feedback). Further, the RRC signaling also configures per G-RNTI whether to dynamically change the data retransmission method based on the DCI, that is, whether to change the data retransmission method through the DCI.

2. The terminal device receives the DCI scrambled by the G-RNTI.

In some optional implementation manners, the G-RNTI scrambled DCI is newly transmitted scheduling DCI (that is, NDI inversion), and the DCI carries an indication information (that is, second indication information), and the indication information is used to indicate Is the retransmission method of the current data (that is, TB) the first retransmission method (that is, retransmission scheduling based on G-RNTI scrambled DCI) or the second retransmission method (that is, retransmission scheduling based on C-RNTI scrambled DCI) ).

In some optional implementation manners, whether the G-RNTI scrambled DCI is new transmission scheduling DCI or retransmission scheduling DCI, the DCI carries an indication information (that is, third indication information), and the indication information is used to Indicates whether the retransmission method of the next retransmission data of the current data (that is, TB) is the first retransmission method (that is, retransmission scheduling based on G-RNTI scrambling DCI) or the second retransmission method (that is, based on C-RNTI plus scrambling DCI for retransmission scheduling).

3. Different retransmission modes indicated by DCI have different impacts on MBS DRX, which are described below.

In some optional implementation manners, the G-RNTI scrambled DCI indicates the first retransmission mode (that is, retransmission scheduling is performed based on the G-RNTI scrambled DCI), for this case:

Case 1-1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-RNTI, that is, drx- HARQ-RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case 1-2) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX associated with the G-RNTI The RTT timer is drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 1-1) and case 1-2), after the DRX RTT timer associated with the G-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the G-RNTI, That is drx-RetransmissionTimer-DL-PTM.

In some optional implementation manners, the G-RNTI scrambled DCI indicates the second retransmission mode (that is, retransmission scheduling based on the C-RNTI scrambled DCI), for this case:

Case 2-1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the C-RNTI, that is, drx-HARQ- RTT-TimerDL. Wherein, the starting moment of starting drx-HARQ-RTT-TimerDL is the first symbol after the HARQ feedback is transmitted.

Case 2-2) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timing associated with the C-RNTI device, namely drx-HARQ-RTT-TimerDL. The start time of drx-HARQ-RTT-TimerDL is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-1) and case 2-2), after the DRX RTT timer associated with the C-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the C-RNTI, That is drx-RetransmissionTimerDL.

Case 2-3) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-RNTI, that is, drx-HARQ- RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case 2-4) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timing associated with the G-RNTI device, namely drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-3) and case 2-4), after the DRX RTT timer associated with the G-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the C-RNTI, That is, drx-RetransmissionTimerDL; the terminal device monitors the PDCCH scrambled by the C-RNTI during the operation of the drx-RetransmissionTimerDL. Or, after the DRX RTT timer associated with the G-RNTI expires, if the corresponding data decoding fails, or whether the decoding succeeds or fails, the terminal device starts the DRX retransmission timer associated with the G-RNTI, that is, drx-RetransmissionTimer- DL-PTM: The terminal device monitors the PDCCH scrambled by the C-RNTI during the operation of drx-RetransmissionTimer-DL-PTM.

Application Example 3

1. The network device configures the configuration information of MBS service transmission for the terminal device through RRC signaling, such as including TMGI, G-RNTI, common frequency domain location for MBS reception, HARQ feedback mode, etc. Wherein, the HARQ feedback mode may be, for example, only a negative acknowledgment feedback mode (NACK only based HARQ feedback), or an ACK/NACK feedback mode (ACK/NACK based HARQ feedback).

2. The terminal device receives the DCI scrambled by the G-RNTI.

Case 1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-RNTI, that is, drx-HARQ- RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case II) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timing associated with the G-RNTI device, namely drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case I) and case II), after the DRX RTT timer associated with the G-RNTI expires, if the corresponding data decoding fails, or whether the decoding succeeds or fails, the terminal device starts the DRX retransmission associated with the G-RNTI The timer is drx-RetransmissionTimer-DL-PTM. The terminal device monitors the PDCCH scrambled by the C-RNTI and the PDCCH scrambled by the G-RNTI during the running of drx-RetransmissionTimer-DL-PTM.

Application Example 4

1. The network device configures the configuration information of MBS service transmission for the terminal device through RRC signaling, such as including TMGI, MBS SPS, G-CS-RNTI, common frequency domain location for MBS reception, HARQ feedback mode, and data retransmission mode wait. Wherein, the HARQ feedback mode may be, for example, only a negative acknowledgment feedback mode (NACK only based HARQ feedback), or an ACK/NACK feedback mode (ACK/NACK based HARQ feedback). Further, the RRC signaling also configures per G-CS-RNTI whether to dynamically change the data retransmission method based on the DCI, that is, whether to change the data retransmission method through the DCI.

2. The terminal device receives the DCI scrambled by the G-CS-RNTI.

In some optional implementation manners, the DCI scrambled by the G-CS-RNTI is an SPS activation instruction, and the DCI carries an indication information (that is, second indication information), and the indication information is used to indicate the current data (also That is, whether the retransmission mode of TB) is the first retransmission mode (ie, retransmission scheduling based on G-CS-RNTI scrambled DCI) or the second retransmission mode (ie, retransmission scheduling based on CS-RNTI scrambled DCI).

In some optional implementation manners, the DCI scrambled by the G-CS-RNTI is an SPS activation instruction, and the DCI carries an indication information (ie, third indication information), and the indication information is used to indicate the current data (ie, TB) is the retransmission method of the next retransmission data is the first retransmission method (that is, retransmission scheduling based on G-CS-RNTI scrambled DCI) or the second retransmission method (that is, based on CS-RNTI scrambled DCI for retransmission schedule).

In some optional implementation manners, the G-CS-RNTI scrambled DCI indicates the first retransmission mode (that is, retransmission scheduling is performed based on the G-CS-RNTI scrambled DCI), for this case:

Case 1-1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-CS-RNTI, namely drx-HARQ-RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case 1-2) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the G-CS-RNTI association The DRX RTT timer, namely drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 1-1) and case 1-2), after the DRX RTT timer associated with the G-CS-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX associated with the G-CS-RNTI to restart Retransmission timer, namely drx-RetransmissionTimer-DL-PTM.

In some optional implementation manners, the G-CS-RNTI scrambled DCI indicates the second retransmission mode (that is, retransmission scheduling based on the CS-RNTI scrambled DCI), for this case:

Case 2-1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the CS-RNTI, that is, drx-HARQ- RTT-TimerDL. Wherein, the starting moment of starting drx-HARQ-RTT-TimerDL is the first symbol after the HARQ feedback is transmitted.

Case 2-2) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timing associated with the CS-RNTI device, namely drx-HARQ-RTT-TimerDL. The start time of drx-HARQ-RTT-TimerDL is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-1) and case 2-2), after the DRX RTT timer associated with the CS-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timer associated with the CS-RNTI, That is drx-RetransmissionTimerDL.

Case 2-3) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-CS-RNTI, that is, drx- HARQ-RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case 2-4) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX associated with the G-CS-RNTI The RTT timer is drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case 2-3) and case 2-4), after the DRX RTT timer associated with the G-CS-RNTI expires, if the corresponding data decoding fails, the terminal device starts the DRX retransmission timing associated with the CS-RNTI device, that is, drx-RetransmissionTimerDL; the terminal device monitors the PDCCH scrambled by the CS-RNTI during the operation of the drx-RetransmissionTimerDL. Or, after the DRX RTT timer associated with the G-CS-RNTI expires, if the corresponding data decoding fails, or whether the decoding succeeds or fails, the terminal device starts the DRX retransmission timer associated with the G-CS-RNTI, that is drx-RetransmissionTimer-DL-PTM: The terminal device monitors the PDCCH scrambled by CS-RNTI during the operation of drx-RetransmissionTimer-DL-PTM.

Application example five

1. The network device configures the configuration information of MBS service transmission for the terminal device through RRC signaling, such as including TMGI, MBS SPS, G-CS-RNTI, common frequency domain location for MBS reception, HARQ feedback mode, etc. Wherein, the HARQ feedback mode may be, for example, only a negative acknowledgment feedback mode (NACK only based HARQ feedback), or an ACK/NACK feedback mode (ACK/NACK based HARQ feedback).

2. The terminal device receives the DCI scrambled by the G-CS-RNTI.

Case 1) If the terminal device receives the MBS service data indicated by the DCI and feeds back the ACK/NACK for the MBS service data, the terminal device starts the DRX RTT timer associated with the G-CS-RNTI, that is, drx- HARQ-RTT-Timer-DL-PTM. Wherein, the start time of starting drx-HARQ-RTT-Timer-DL-PTM is the first symbol after the HARQ feedback is transmitted.

Case II) If the terminal device receives the MBS service data indicated by the DCI and successfully receives the MBS service data, and does not feed back ACK/NACK for the MBS service data, the terminal device starts the DRX associated with the G-CS-RNTI The RTT timer is drx-HARQ-RTT-Timer-DL-PTM. Among them, the start time of drx-HARQ-RTT-Timer-DL-PTM startup is the first symbol after the end of the PUCCH resource corresponding to the NACK only feedback mode.

For the above case I) and case II), after the DRX RTT timer associated with the G-CS-RNTI expires, if the corresponding data decoding fails, or whether the decoding succeeds or fails, the terminal device starts the G-CS-RNTI association The DRX retransmission timer, that is, drx-RetransmissionTimer-DL-PTM. The terminal device monitors the PDCCH scrambled by the CS-RNTI and the PDCCH scrambled by the G-CS-RNTI during the running of drx-RetransmissionTimer-DL-PTM.

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application. For another example, on the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with the prior art arbitrarily, and the technical solutions obtained after the combination should also fall within the scope of this application. protected range.

It should also be understood that, in various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink", "uplink" and "sidelink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is sent from the station The first direction to the user equipment in the cell, "uplink" is used to indicate that the signal or data transmission direction is the second direction sent from the user equipment in the cell to the station, and "side line" is used to indicate that the signal or data transmission direction is A third direction sent from UE1 to UE2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Fig. 5 is a schematic diagram of the structural composition of the device for determining the retransmission mode provided by the embodiment of the present application. It is applied to a terminal device. As shown in Fig. 5, the device for determining the retransmission mode includes:

The receiving unit 501 is configured to receive the first signaling sent by the network device, the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the first retransmission mode, and the receiving unit 501 receives the first retransmission mode. After a piece of data, the feedback unit 502 performs HARQ feedback for the first data, and the control unit 503 starts a first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the first retransmission mode, and the receiving unit 501 receives the first retransmission mode. After receiving the first data and successfully receiving the first data, the feedback unit 502 does not perform HARQ feedback for the first data, and the control unit 503 starts the first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

In some optional implementation manners, the control unit 503 is further configured to, if the first DRX RTT timer times out, start the The first DRX retransmission timer associated with the first RNTI.

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the second retransmission mode, and the receiving unit 501 receives the second retransmission mode. After one data, the feedback unit 502 performs HARQ feedback for the first data, and the control unit 503 starts a second DRX RTT timer associated with the second RNTI.

In some optional implementation manners, the start time of the second DRX RTT timer is the first symbol after the HARQ feedback ends.

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the second retransmission mode, and the receiving unit 501 receives the second retransmission mode. After receiving the first data and successfully receiving the first data, the feedback unit 502 does not perform HARQ feedback for the first data, and the control unit 503 starts a second DRX RTT timer associated with the second RNTI.

In some optional implementation manners, the start time of the second DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.

In some optional implementation manners, the control unit 503 is further configured to, if the second DRX RTT timer times out, start the The second DRX retransmission timer associated with the second RNTI.

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the second retransmission mode, and the receiving unit 501 receives the second retransmission mode. After a piece of data, the feedback unit 502 performs HARQ feedback for the first data, and the control unit 503 starts a first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the device further includes: a feedback unit 502 and a control unit 503; the retransmission mode indicated by the first signaling is the second retransmission mode, and the receiving unit 501 receives the second retransmission mode. After receiving the first data and successfully receiving the first data, the feedback unit 502 does not perform HARQ feedback for the first data, and the control unit 503 starts the first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the control unit 503 is further configured to:

If the first DRX RTT timer expires, in the case that the data decoding associated with the first DRX RTT timer fails, start the second DRX retransmission timer associated with the second RNTI, and control the The receiving unit 501 monitors the PDCCH scrambled by the second RNTI during the running of the second DRX retransmission timer; or,

If the first DRX RTT timer expires, in the case that the data decoding associated with the first DRX RTT timer fails or whether the decoding succeeds or fails, start the first DRX retransmission timing associated with the first RNTI and controlling the receiving unit 501 to monitor the PDCCH scrambled by the second RNTI during the running of the first DRX retransmission timer.

In some optional implementation manners, the first signaling is RRC signaling.

In some optional implementation manners, the RRC signaling carries first indication information, and the first indication information is used to indicate whether the data retransmission manner is the first retransmission manner or the second retransmission manner.

In some optional implementation manners, when the first signaling is RRC signaling, the first data is data indicated by the second signaling; the receiving unit 501 is further configured to receive the second signaling, and receive the first data based on the second signaling.

In some optional implementation manners, the second signaling is MBS dynamic scheduling DCI or MBS retransmission scheduling DCI or MBS SPS authorization.

In some optional implementation manners, the DCI is a new transmission scheduling DCI or a semi-persistent scheduling SPS activation instruction, and the DCI carries second indication information, and the second indication information is used to indicate that the retransmission mode of the current data is the The first retransmission mode or the second retransmission mode.

In some optional implementation manners, the receiving unit 501 is further configured to receive RRC signaling sent by the network device, where the RRC signaling carries configuration information associated with the first RNTI, and the configuration information is used for Configure whether to control the data retransmission mode through DCI.

In some optional implementation manners, when the first signaling is DCI, the first data is data scheduled by the DCI.

Those skilled in the art should understand that the relevant description of the apparatus for determining the retransmission mode in the embodiment of the present application can be understood with reference to the relevant description of the method for determining the retransmission mode in the embodiment of the present application.

Fig. 6 is a schematic diagram of the structure and composition of the timer control device provided by the embodiment of the present application, which is applied to a terminal device. As shown in Fig. 6, the device for determining the retransmission mode includes:

The receiving unit 601 is configured to receive DCI scrambled by a first RNTI sent by a network device, where the first RNTI is G-RNTI or G-CS-RNTI; receive data scheduled by the DCI;

The control unit 602 is configured to start a first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the apparatus further includes: a feedback unit 603; after the receiving unit 601 receives the data that completes the DCI scheduling, the feedback unit 603 performs HARQ feedback on the data, and the control unit 602 Start the first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the device further includes: a feedback unit 603; after the receiving unit 601 receives the data that completes the DCI scheduling and successfully receives the data, the feedback unit 603 does not perform HARQ for the data Feedback, the control unit 602 starts the first DRX RTT timer associated with the first RNTI.

In some optional implementation manners, the control unit 602 is further configured to: if the first DRX RTT timer expires, if the decoding of the data associated with the first DRX RTT timer fails or no matter whether the decoding is successful Still fails, start the first DRX retransmission timer associated with the first RNTI, and control the receiving unit 601 to monitor the PDCCH scrambled by the first RNTI and the first DRX retransmission timer during the running of the first RNTI A PDCCH scrambled by two RNTIs, where the second RNTI is a C-RNTI or a CS-RNTI.

Fig. 7 is a schematic diagram of the second structural composition of the device for determining the retransmission mode provided by the embodiment of the present application, which is applied to network equipment. As shown in Fig. 7, the device for determining the retransmission mode includes:

The sending unit 701 is configured to send first signaling to the terminal device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

In some optional implementation manners, the first signaling is RRC signaling.

In some optional implementation manners, the DCI is a new transmission scheduling DCI or an SPS activation instruction, and the DCI carries second indication information, and the second indication information is used to indicate that the retransmission mode of the current data is the first The retransmission mode is also the second retransmission mode.

In some optional implementation manners, the sending unit 701 is further configured to send RRC signaling to the terminal device, where the RRC signaling carries configuration information associated with the first RNTI, and the configuration information is used to configure Whether to control the data retransmission mode through DCI.

FIG. 8 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 800 shown in FIG. 8 includes a processor 810, and the processor 810 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 8 , the communication device 800 may further include a memory 820 . Wherein, the processor 810 can call and run a computer program from the memory 820, so as to implement the method in the embodiment of the present application.

Wherein, the memory 820 may be an independent device independent of the processor 810 , or may be integrated in the processor 810 .

Optionally, as shown in FIG. 8, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, to send information or data to other devices, or receive other Information or data sent by the device.

Wherein, the transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include antennas, and the number of antennas may be one or more.

Optionally, the communication device 800 may specifically be the network device of the embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 800 may specifically be the mobile terminal/terminal device of the embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , which will not be repeated here.

FIG. 9 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 900 shown in FIG. 9 includes a processor 910, and the processor 910 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 9 , the chip 900 may further include a memory 920 . Wherein, the processor 910 can invoke and run a computer program from the memory 920, so as to implement the method in the embodiment of the present application.

Wherein, the memory 920 may be an independent device independent of the processor 910 , or may be integrated in the processor 910 .

Optionally, the chip 900 may also include an input interface 930 . Wherein, the processor 910 can control the input interface 930 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 900 may also include an output interface 940 . Wherein, the processor 910 can control the output interface 940 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application. For the sake of brevity, details are not repeated here.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, here No longer.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

Fig. 10 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application. As shown in FIG. 10 , the communication system 1000 includes a terminal device 1010 and a network device 1020 .

Wherein, the terminal device 1010 can be used to realize the corresponding functions realized by the terminal device in the above method, and the network device 1020 can be used to realize the corresponding functions realized by the network device in the above method. .

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above-mentioned memory is illustrative but not restrictive. For example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.

The embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application, For the sake of brevity, details are not repeated here.

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , which will not be repeated here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disc, etc., which can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method for determining a retransmission mode, the method comprising:

The terminal device receives the first signaling sent by the network device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission method refers to: the retransmission of data is scheduled based on the downlink control information DCI scrambled by the first wireless network temporary identifier RNTI, and the first RNTI is a group-radio network temporary identifier G-RNTI or a group- Configure scheduling-wireless network temporary identifier G-CS-RNTI;

The second retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is the cell-radio network temporary identifier C-RNTI or configuration scheduling-radio network temporary identifier CS- RNTI.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the first retransmission mode, and the method further comprises:

After receiving the first data, the terminal device performs hybrid automatic repeat request (HARQ) feedback for the first data, and starts a first discontinuous reception DRX round-trip time RTT timer associated with the first RNTI.
The method according to claim 2, wherein the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the first retransmission mode, and the method further comprises:

After receiving the first data and successfully receiving the first data, the terminal device does not perform HARQ feedback for the first data, and the terminal device starts a first DRX RTT timer associated with the first RNTI.
The method according to claim 4, wherein the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the negative acknowledgment NACK only feedback mode ends.
The method according to any one of claims 2 to 5, wherein the method further comprises:

If the first DRX RTT timer expires, the terminal device starts the first DRX retransmission timer associated with the first RNTI in the case that the data decoding associated with the first DRX RTT timer fails.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the second retransmission mode, and the method further comprises:

After receiving the first data, the terminal device performs HARQ feedback for the first data, and starts a second DRX RTT timer associated with the second RNTI.
The method according to claim 7, wherein the start time of the second DRX RTT timer is the first symbol after the HARQ feedback ends.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the second retransmission mode, and the method further comprises:

After receiving the first data and successfully receiving the first data, the terminal device does not perform HARQ feedback for the first data, and the terminal device starts a second DRX RTT timer associated with the second RNTI.
The method according to claim 9, wherein the start time of the second DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.
The method according to any one of claims 7 to 10, wherein the method further comprises:

If the second DRX RTT timer expires, the terminal device starts a second DRX retransmission timer associated with the second RNTI in the case that the decoding of data associated with the second DRX RTT timer fails.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the second retransmission mode, and the method further comprises:

After receiving the first data, the terminal device performs HARQ feedback for the first data, and starts a first DRX RTT timer associated with the first RNTI.
The method according to claim 11, wherein the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.
The method according to claim 1, wherein the retransmission mode indicated by the first signaling is the second retransmission mode, and the method further comprises:

After the terminal device completes receiving the first data and successfully receives the first data, it does not perform HARQ feedback for the first data, and the terminal device starts a first DRX RTT timer associated with the first RNTI.
The method according to claim 14, wherein the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.
The method according to any one of claims 12 to 15, wherein the method further comprises:

If the first DRX RTT timer expires, in the case that the data decoding associated with the first DRX RTT timer fails, the terminal device starts a second DRX retransmission timer associated with the second RNTI, and monitor the PDCCH scrambled by the second RNTI during the operation of the second DRX retransmission timer; or,

If the first DRX RTT timer expires, if the decoding of the data associated with the first DRX RTT timer fails or whether the decoding succeeds or fails, the terminal device starts the first RNTI associated with the first RNTI A DRX retransmission timer, and monitor the PDCCH scrambled by the second RNTI during the running period of the first DRX retransmission timer.
The method according to any one of claims 1 to 16, wherein the first signaling is RRC signaling.
The method according to claim 17, wherein the RRC signaling carries first indication information, and the first indication information is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode. transmission method.
The method according to any one of claims 2 to 18, wherein, when the first signaling is RRC signaling, the first data is the data indicated by the second signaling; the method further includes :

The terminal device receives the second signaling, and receives the first data based on the second signaling.
The method according to claim 19, wherein the second signaling is MBS dynamic scheduling DCI or MBS retransmission scheduling DCI or MBS SPS authorization.
The method according to any one of claims 1 to 16, wherein the first signaling is DCI, and the DCI is scrambled by the first RNTI.
The method according to claim 21, wherein the DCI is a new transmission scheduling DCI or a semi-persistent scheduling SPS activation instruction, and the DCI carries second indication information, and the second indication information is used to indicate retransmission of current data The mode is the first retransmission mode or the second retransmission mode.
The method according to claim 21, wherein the DCI is a new transmission scheduling DCI or a retransmission scheduling DCI or an SPS activation instruction, and the DCI carries third indication information, and the third indication information is used to indicate the current data The retransmission mode of the next retransmitted data is the first retransmission mode or the second retransmission mode.
The method according to any one of claims 21 to 23, wherein the method further comprises:

The terminal device receives RRC signaling sent by the network device, where the RRC signaling carries configuration information associated with the first RNTI, and the configuration information is used to configure whether to control data retransmission mode through DCI.
The method according to any one of claims 2-16, 21-24, wherein when the first signaling is DCI, the first data is data scheduled by the DCI.
A method for controlling a timer, the method comprising:

The terminal device receives the DCI scrambled by the first RNTI sent by the network device, where the first RNTI is a G-RNTI or a G-CS-RNTI;

The terminal device receives the data scheduled by the DCI, and starts a first DRX RTT timer associated with the first RNTI.
The method according to claim 26, wherein the terminal device receives the data scheduled by the DCI, and starts a first DRX RTT timer associated with the first RNTI, comprising:

After receiving the data that has completed the DCI scheduling, the terminal device performs HARQ feedback for the data, and starts the first DRX RTT timer associated with the first RNTI.
The method according to claim 27, wherein the start time of the first DRX RTT timer is the first symbol after the HARQ feedback ends.
The method according to claim 26, wherein the terminal device receives the data scheduled by the DCI, and starts a first DRX RTT timer associated with the first RNTI, comprising:

After the terminal device receives the data that has completed the DCI scheduling and successfully receives the data, it does not perform HARQ feedback for the data, and the terminal device starts the first DRX RTT timer associated with the first RNTI.
The method according to claim 29, wherein the start time of the first DRX RTT timer is the first symbol after the common feedback resource corresponding to the NACK only feedback mode ends.
The method according to any one of claims 26 to 30, wherein the method further comprises:

If the first DRX RTT timer expires, if the decoding of the data associated with the first DRX RTT timer fails or whether the decoding succeeds or fails, the terminal device starts the first RNTI associated with the first RNTI DRX retransmission timer, and monitor the PDCCH scrambled by the first RNTI and the PDCCH scrambled by the second RNTI during the operation of the first DRX retransmission timer, and the second RNTI is C-RNTI or CS-RNTI RNTI.
A method for determining a retransmission mode, the method comprising:

The network device sends the first signaling to the terminal device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is G-RNTI or G-CS-RNTI;

The second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a C-RNTI or a CS-RNTI.
The method according to claim 32, wherein the first signaling is RRC signaling.
The method according to claim 33, wherein the RRC signaling carries first indication information, and the first indication information is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode. transmission method.
The method according to claim 32, wherein the first signaling is DCI, and the DCI is scrambled by the first RNTI.
The method according to claim 35, wherein the DCI is a new transmission scheduling DCI or an SPS activation instruction, and the DCI carries second indication information, and the second indication information is used to indicate that the retransmission mode of the current data is the The first retransmission mode or the second retransmission mode.
The method according to claim 35, wherein the DCI is a new transmission scheduling DCI or a retransmission scheduling DCI or an SPS activation instruction, and the DCI carries third indication information, and the third indication information is used to indicate the current data The retransmission mode of the next retransmitted data is the first retransmission mode or the second retransmission mode.
The method according to any one of claims 35 to 37, wherein the method further comprises:

The network device sends RRC signaling to the terminal device, where the RRC signaling carries configuration information associated with the first RNTI, and the configuration information is used to configure whether to control data retransmission through DCI.
A device for determining a retransmission mode is applied to a terminal device, and the device includes:

The receiving unit is configured to receive the first signaling sent by the network device, the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is G-RNTI or G-CS-RNTI;

The second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a C-RNTI or a CS-RNTI.
A timer control device, applied to terminal equipment, the device includes:

A receiving unit, configured to receive DCI scrambled by a first RNTI sent by a network device, where the first RNTI is G-RNTI or G-CS-RNTI; receive data scheduled by the DCI;

A control unit, configured to start a first DRX RTT timer associated with the first RNTI.
A device for determining a retransmission mode is applied to network equipment, and the device includes:

A sending unit, configured to send first signaling to the terminal device, where the first signaling is used to indicate whether the data retransmission mode is the first retransmission mode or the second retransmission mode, wherein,

The first retransmission method refers to: the retransmission of data is scheduled based on the DCI scrambled by the first RNTI, and the first RNTI is G-RNTI or G-CS-RNTI;

The second retransmission mode refers to: the retransmission of data is scheduled based on the DCI scrambled by the second RNTI, and the second RNTI is a C-RNTI or a CS-RNTI.
A terminal device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute the computer program described in any one of claims 1 to 25 , or a method as claimed in any one of claims 26 to 31.
A network device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to invoke and run the computer program stored in the memory, and execute the computer program described in any one of claims 32 to 38 Methods.
A chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 25, or claims 26 to 31 any one of the methods described.
A chip, comprising: a processor, configured to invoke and run a computer program from a memory, so that a device equipped with the chip executes the method as claimed in any one of claims 32 to 38.
A computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 25, or the method according to any one of claims 26 to 31 .
A computer-readable storage medium for storing a computer program, the computer program causing a computer to perform the method as claimed in any one of claims 32 to 38.
A computer program product, comprising computer program instructions, which cause a computer to execute the method according to any one of claims 1 to 25, or the method according to any one of claims 26 to 31.
A computer program product comprising computer program instructions for causing a computer to perform the method as claimed in any one of claims 32 to 38.
A computer program that causes a computer to execute the method according to any one of claims 1 to 25, or the method according to any one of claims 26 to 31.
A computer program that causes a computer to perform the method as claimed in any one of claims 32 to 38.