WO2022165843A1

WO2022165843A1 - Sidelink transmission method and terminal

Info

Publication number: WO2022165843A1
Application number: PCT/CN2021/076040
Authority: WO
Inventors: 赵振山; 张世昌; 林晖闵
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-08-11
Also published as: CN116325637A

Abstract

The present application relates to a sidelink transmission method and a terminal. The sidelink transmission method comprises: after receiving first information from a second terminal, a first terminal sending a first PSSCH within a time range of when a first timer is active, wherein the first timer is a timer determined according to sidelink discontinuous reception (DRX) configuration information. In the embodiments of the present application, a first terminal acquires a timer state of a second terminal according to indication information sent by the second terminal, such that whether sidelink data can be sent within a time range of when a timer is active can be determined. Sending the sidelink data within the time range of when the timer is active facilitates ensuring successful transmission of the sidelink data.

Description

Sideline transmission method and terminal

technical field

The present application relates to the field of communications, and more particularly, to a sideline transmission method and terminal.

Background technique

A discontinuous reception (Discontinuous Reception, DRX) mechanism is introduced in the side link (Sidelink, SL). The terminal can receive data sent by other terminals within the scope of the DRX activation period. If the terminal does not detect data, it can enter a sleep state within the range of the sleep period of the DRX to save power consumption. In the SL DRX mechanism, it is necessary to ensure the successful transmission of sideline data.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a sideline transmission method and terminal, which can ensure the successful transmission of sideline data.

An embodiment of the present application provides a sideline transmission method, including: when a first terminal receives first information from a second terminal, sending a first physical sideline control channel within a time range when a first timer is activated PSSCH, wherein the first timer is a timer determined according to the DRX configuration information of the lateral discontinuous reception.

An embodiment of the present application provides a sideline transmission method, including: a second terminal sending first information to a first terminal, where the first information is used to instruct the second terminal to activate, start or restart a first timer, or, The first information is used to instruct the first terminal to send the first physical sidelink control channel PSSCH within the time range when the first timer is activated, wherein the first timer is determined according to the sidelink discontinuous reception DRX configuration information timer.

An embodiment of the present application provides a first terminal, including: a sending unit, configured to send a first physical sideline control within a time range when a first timer is activated in the case of receiving first information from a second terminal channel PSSCH, wherein the first timer is a timer determined according to the lateral discontinuous reception DRX configuration information.

An embodiment of the present application provides a second terminal, including: a sending unit configured to send first information to the first terminal, where the first information is used to instruct the second terminal to activate, start or restart a first timer, or , the first information is used to instruct the first terminal to send the first physical sideline control channel PSSCH within the time range when the first timer is activated, wherein the first timer is based on the sideline discontinuous reception DRX configuration information definite timer.

An embodiment of the present application provides a first terminal, including a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, so that the first terminal executes the sideline transmission method executed by the first terminal.

An embodiment of the present application provides a second terminal, including a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, so that the second terminal executes the above-mentioned sideline transmission method executed by the second terminal.

An embodiment of the present application provides a chip for implementing the above-mentioned sideline transmission method. Specifically, the chip includes: a processor for invoking and running a computer program from the memory, so that the device on which the chip is installed executes the above-mentioned sideline transmission method.

Embodiments of the present application provide a computer-readable storage medium for storing a computer program, which, when the computer program is executed by a device, causes the device to execute the above-mentioned sideline transmission method.

An embodiment of the present application provides a computer program product, including computer program instructions, and the computer program instructions cause a computer to execute the above-mentioned sideline transmission method.

An embodiment of the present application provides a computer program, which, when running on a computer, causes the computer to execute the above-mentioned sideline transmission method.

In this embodiment of the present application, the first terminal acquires the timer status of the second terminal according to the indication information sent by the second terminal, so as to determine whether the sideline data can be sent within the time range of the timer activation, and when the timer is activated Sending the sideline data within the time range is beneficial to ensure the successful transmission of the sideline data.

Description of drawings

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

Figure 2a is a schematic diagram of inbound communication within a network coverage area.

FIG. 2b is a schematic diagram of partial network coverage sideline communication.

Figure 2c is a schematic diagram of network coverage outside the row communication.

Figure 3a is a schematic diagram of unicast transmission.

Figure 3b is a schematic diagram of multicast transmission.

Figure 3c is a schematic diagram of broadcast transmission.

Figure 4 is a schematic diagram of side row feedback.

FIG. 5 is a schematic diagram of a time slot for sideline feedback.

FIG. 6 is a schematic diagram of a listening window and a selection window.

Figure 7 is a schematic diagram of the Re-evaluation mechanism.

Figure 8 is a schematic diagram of the Pre-emption mechanism.

Figure 9 is a schematic diagram of a DRX cycle.

FIG. 10a is a schematic diagram of DRX at the receiving end.

FIG. 10b is a schematic diagram of DRX activated by a timer at the receiver.

FIG. 11 is a schematic flowchart of a sideline transmission method according to an embodiment of the present application.

FIG. 12 is a schematic flowchart of a sideline transmission method according to another embodiment of the present application.

FIG. 13 is a schematic flowchart of a sideline transmission method according to an embodiment of the present application.

FIG. 14 is a schematic diagram of a comparison between the DRX configured by the receiving end and the DRX of the activated timer in the sideline transmission method according to an embodiment of the present application.

FIG. 15 is a schematic block diagram of a first terminal according to an embodiment of the present application.

FIG. 16 is a schematic block diagram of a first terminal according to another embodiment of the present application.

FIG. 17 is a schematic block diagram of a second terminal according to an embodiment of the present application.

FIG. 18 is a schematic block diagram of a second terminal according to another embodiment of the present application.

FIG. 19 is a schematic block diagram of a communication device according to an embodiment of the present application.

FIG. 20 is a schematic block diagram of a chip according to an embodiment of the present application.

FIG. 21 is a schematic block diagram of a communication system according to 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 accompanying drawings in the embodiments of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (Advanced long term evolution, LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application can also be applied to these communication systems.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

Optionally, the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In this embodiment of the present application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).

In this embodiment of the present application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In this embodiment of the present application, the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks The network equipment (gNB) in the PLMN network in the future evolution or the network equipment in the NTN network, etc.

As an example and not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite, etc. Optionally, the network device may also be a base station set in a location such as land or water.

In this embodiment of the present application, a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell). Pico cell), Femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

FIG. 1 exemplarily shows a communication system 100 . The communication system includes one network device 110 and two terminal devices 120 . Optionally, the communication system 100 may include multiple network devices 110, and the coverage of each network device 110 may include other numbers of terminal devices 120, which are not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), which are not made in this embodiment of the present application. limited. Wherein, the network equipment may further include access network equipment and core network equipment. That is, the wireless communication system further includes a plurality of core networks for communicating with the access network equipment. The access network equipment may be a long-term evolution (long-term evolution, LTE) system, a next-generation (mobile communication system) (next radio, NR) system, or an authorized auxiliary access long-term evolution (authorized auxiliary access long-term evolution, LAA- Evolved base station (evolutional node B, may be referred to as eNB or e-NodeB for short) in LTE) system macro base station, micro base station (also called "small base station"), pico base station, access point (AP), Transmission site (transmission point, TP) or new generation base station (new generation Node B, gNodeB), etc.

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. Taking the communication system shown in FIG. 1 as an example, the communication device may include a network device and a terminal device with a communication function, and the network device and the terminal device may be specific devices in this embodiment of the application, which will not be repeated here; It may include other devices in the communication system, for example, other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship. For example, if A indicates B, it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.

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 arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the embodiments of the present application. protected range.

(1) Sideline communication under different network coverage environments:

In sideline communication, it can be divided into various types according to the coverage of the network where the communicating terminal is located. For example, the network covers the inner row communication, part of the network covers the side row communication, and the network covers the outer row communication, as shown in Fig. 2a, Fig. 2b and Fig. 2c, respectively.

As shown in Figure 2a: in the network coverage of the inbound communication, all the terminals performing the lateral communication are within the coverage of the same base station. Therefore, the above-mentioned terminals can receive the configuration signaling of the base station based on the same lateral configuration. sideline communication.

As shown in Fig. 2b: in the case of partial network coverage of sideline communication, some terminals performing sideline communication are located within the coverage of the base station. This part of the terminals can receive the configuration signaling of the base station, and perform sideline communication according to the configuration of the base station. However, the terminal located outside the network coverage cannot receive the configuration signaling of the base station. In this case, the terminal outside the network coverage will use the pre-configuration information and the side broadcast channel sent by the terminal located in the network coverage, such as the side physical broadcast channel (Physical Sidelink Broadcast Channel, PSBCH) The information carried in the device determines the sideline configuration and performs sideline communication.

As shown in Figure 2c: for the communication outside the network coverage, all the terminals performing the lateral communication are located outside the network coverage, and all the terminals determine the lateral configuration according to the pre-configured information to perform the lateral communication.

(2) D2D/V2X:

Device to Device (D2D) communication is a transmission technology based on Sidelink (SL). Different from the traditional cellular system in which the communication data is received or sent through the base station, the D2D system has higher spectral efficiency and lower transmission delay. Vehicle to Everything (V2X) system adopts terminal-to-terminal direct communication.

In 3GPP, D2D/V2X includes two transmission modes: a first mode and a second mode.

The first mode: the transmission resources of the terminal are allocated by the base station. The terminal transmits data on the sidelink according to the resources allocated by the base station. The base station may allocate resources for a single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal. As shown in Fig. 2a, the terminal is located within the coverage of the network, and the network allocates transmission resources for sideline transmission to the terminal.

The second mode: the terminal selects a resource in the resource pool for data transmission. As shown in Fig. 2c, the terminal is located outside the coverage of the cell, and the terminal autonomously selects transmission resources from the preconfigured resource pool to perform lateral transmission. Alternatively, as shown in Figure 2a, the terminal autonomously selects transmission resources from the resource pool configured by the network to perform sideline transmission.

(3) NR-V2X:

In NR-V2X, autonomous driving needs to be supported, so higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, More flexible resource allocation, etc.

In LTE-V2X, broadcast transmission is supported, and in NR-V2X, unicast and multicast transmissions are introduced. For unicast transmission, the receiving terminal (which may be referred to as the receiving terminal for short) has only one terminal. As shown in FIG. 3a, unicast transmission is performed between UE1 and UE2. For multicast transmission, the receivers are all terminals in a communication group, or all terminals within a certain transmission distance. As shown in Figure 3b, UE1, UE2, UE3, and UE4 form a communication group, wherein UE1 sends data, and other terminal devices in the group are receiver terminals. For the broadcast transmission mode, the receiving end is any terminal around the transmitting end terminal (may be referred to as the transmitting end for short). As shown in Fig. 3c, UE1 is a transmitting terminal, and other terminals around it, UE2-UE6, are all receiving terminals.

(4) Second-order Sidelink Control Information (SCI) mechanism in NR-V2X

Introduce 2-order SCI in NR-V2X. The first-order SCI is carried in the Physical Sidelink Control Channel (PSCCH), and is used to indicate the transmission resources, reserved resource information, modulation and coding methods of the Physical Sidelink Shared Channel (PSSCH) Modulation and Coding Scheme, MCS) level, priority and other information. The second-order SCI is sent in the resources of PSSCH, and demodulated by demodulation reference signal (Demodulation Reference Signal, DMRS) of PSSCH, which is used to indicate the identifier of the sender (Identifier, ID), the ID of the receiver, and the hybrid automatic repeat request. (Hybrid Automatic Repeat Request, HARQ) ID, New Data Indicator (New Data Indicator, NDI) and other information used for data demodulation.

(5) Sideline feedback channel:

In NR-V2X, in order to improve reliability, a sideline feedback channel is introduced. For example, referring to FIG. 4, for unicast transmission, the sender terminal sends sideline data to the receiver terminal, including the physical sideline control channel (PSCCH) and the physical sideline shared channel (PSSCH). The receiving terminal sends hybrid automatic repeat request (HARQ) feedback information to the transmitting terminal. The sender terminal determines whether retransmission needs to be performed according to the feedback information of the receiver terminal. The HARQ feedback information is carried in a sideline feedback channel, for example, in a physical sidelink feedback channel (Physical Sidelink Feedback Channel, PSFCH).

Sideline feedback can be activated or deactivated through pre-configuration information or network configuration information. If the sideline feedback is activated, the receiver terminal receives the sideline data sent by the sender terminal, and feeds back HARQ ACK (ACKnowledge, confirmation) or NACK (Negative ACKnowledge, negative acknowledgment) to the sender according to the detection result. The sender terminal decides to send retransmission data or new data according to the feedback information of the receiver terminal. If the sideline feedback is deactivated, the receiving terminal does not need to send feedback information, and the transmitting terminal usually sends data by means of blind retransmission. For example, the transmitting end terminal repeatedly sends each sideline data K times, instead of deciding whether to send retransmitted data according to the feedback information of the receiving end terminal.

(6) Resources of the sideline feedback channel

In order to reduce the overhead of the PSFCH channel, one time slot defined in every N time slots (slots) includes PSFCH transmission resources, that is, the period of the sideline feedback resources is N time slots. Wherein N=0, 1, 2, 4, the parameter N is pre-configured or network-configured. When N=0, it means that the resource pool is not configured with feedback resources, that is, sideline feedback is not supported. The schematic diagram of N=4 can be seen in Fig. 5, in which the feedback information of the PSSCH transmitted in time slots (slots) 2, 3, 4, and 5 is all transmitted in time slot 7, so the time slot {2, 3, 4, 5} are regarded as a set of time slots. For the PSSCH transmitted in the time slot set, the corresponding PSFCH is in the same time slot.

The transmitter terminal transmits PSCCH/PSSCH in time slot n. The receiver sends the PSFCH in the first available time slot after time slot n+k. where k is a configuration parameter, k=2 or k=3. For example, in FIG. 5, the network configuration k=2, the transmitting terminal (TX UE) transmits PSCCH/PSSCH in time slot 4, and the receiving terminal transmits PSFCH in the first available time slot after time slot 6, that is, time slot 7.

(7) Resource selection method based on listening:

In mode 2 (Mode 2) of NR-V2X, that is, in the above-mentioned second mode, the terminal autonomously selects transmission resources from a resource pool pre-configured or configured by a network device. The terminal selects resources based on the listening result. For example, in time slot n, the higher layer triggers the physical layer to report the set of transmission resources. The physical layer listens according to the indication information of the higher layer. The terminal determines the listening window

and selection window [n+T ₁ , n+T ₂ ] wherein, T ₀ represents the starting position of the listening window, which is determined according to the configuration parameters;

Represents the end position of the listening window, determined according to the processing time of the terminal; T ₁ represents the starting position of the selection window,

parameter

Determined according to the processing time of the terminal; T ₂ represents the end position of the selection window, T _2min ≤ T ₂ ≤ remaining packet delay budget (Packet Delay Budget, PDB), and T _2min is determined according to configuration parameters. The terminal can determine the candidate resource set in the selection window according to the listening result in the listening window. Referring to FIG. 6 , the listening window of the terminal may be between [n-1000, n-1], and the selection window is [n+1, n+100].

The process that the terminal selects resources in the selection window mainly includes:

Step 1. The terminal will select all available resources in the window as a set A.

Step 2. If the terminal has no listening result in some subframes in the listening window, in set A, the resources on the subframes corresponding to these subframes in the selection window are excluded.

Step 3. If the terminal detects the PSCCH in the listening window, measure the RSRP reference signal received power (Reference Signal Received Power, RSRP) of the PSCCH or measure the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is higher than the RSRP threshold, and the reserved transmission resource determined according to the reservation information in the control information has a resource conflict with the data to be sent by the terminal, the resource is excluded from the set A. The selection of the RSRP threshold is determined by the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the terminal.

Step 4. If the number of resources remaining in set A is less than X% of the number of total resources (eg X=20), the terminal can increase the threshold of RSRP, eg 3dB, and repeat steps 1-3 until the remaining resources in set A The quantity is greater than X% of the total number of resources. Among them, X is a parameter configured by the high layer.

Step 5. The terminal reports the set A to the upper layer.

Step 6. The upper layer of the terminal selects resources from the set A with equal probability for data transmission.

(8) Pre-emption (preemption) mechanism and Re-evaluation (re-evaluation) mechanism in NR-V2X:

In LTE-V2X, when the terminal selects transmission resources, it will send data on these resources. However, it is possible that two terminals have selected the same transmission resource, and in this case, resource conflict will occur and system performance will be reduced. In order to solve this problem, the Pre-emption and Re-evaluation mechanisms are introduced in NR-V2X, so that the terminal can determine whether there is a resource conflict with other terminals before using the selected resources. If there is no conflict, the selected transmission resource can continue to be used. If there is a resource conflict, avoidance and resource reselection need to be performed according to the corresponding mechanism to avoid resource conflict.

NR-V2X supports the Re-evaluation mechanism. After the terminal completes resource selection, resources that have been selected but not indicated by sending sideline control information may still be reserved by other terminals with burst aperiodic services, resulting in resource collision. In response to this problem, a Re-evaluation mechanism is proposed, that is, the terminal continues to listen to the sideline control information after completing the resource selection, and re-evaluates at least once the resources that have been selected but not indicated.

An exemplary Re-evaluation mechanism is shown in FIG. 7 , where resources w, x, y, z, and v are time-frequency resources that have been selected by the UE, and resource x is located in time slot m. For the resources y and z that the UE will send the sidelink control information for the first time in resource x (resource x has been indicated by the sidelink control information in resource w before): the UE performs resource listening at least once in time slot _mT3 , that is, A resource selection window and a listening window are determined, and resources in the resource selection window are excluded to obtain a candidate resource set. If resource y or z is not in the candidate resource set, the UE reselects the time-frequency resources in resources y and z that are not in the candidate resource set, and can also reselect any resource that has been selected but not indicated by sending sideline control information (also That is, although the resource has been selected by the upper layer, the resource is not indicated by the SCI). For example, any number of resources y, z, and v. _The above T3 depends on the processing capability of the terminal.

NR-V2X supports the Pre-emption mechanism, that is, the resource preemption mechanism. In NR-V2X, the conclusion about the Pre-emption mechanism is described from the perspective of the preempted UE. After the resource selection is completed, the UE continues to monitor the sideline control information. If the time-frequency resources that have been selected and have been indicated by sending sideline control information meet the following three conditions, resource reselection is triggered:

Condition 1. The resources reserved in the detected sideline control information overlap with the resources selected and indicated by the UE, including full overlap and partial overlap.

Condition 2. The RSRP of the PSCCH corresponding to the sideline control information detected by the UE or the RSRP of the PSSCH scheduled by the PSCCH is greater than the SL RSRP threshold.

Condition 3. The priority carried in the detected sideline control information is higher than the priority of the data to be sent by the UE.

An exemplary Pre-emption mechanism is shown in FIG. 8 , where resources w, x, y, z, and v are time-frequency resources that have been selected by the UE, and resource x is located in time slot m. For resources x and y indicated by the UE about to send the sidelink control information in time slot m and indicated by the sidelink control information sent by the UE before: the UE performs resource listening at least once in time slot _mT3 to determine a candidate resource set. If the resource x or y is not in the candidate resource set (satisfies the above conditions 1 and 2), further judge whether the resource x or y is not in the candidate resource set due to the indication of the sideline control information carrying the high priority (the above condition 3 is satisfied) ). If yes, the UE performs resource re-selection, and re-selects the time-frequency resources in x and y that satisfy the above three conditions.

In the above-mentioned process of the terminal autonomously selecting transmission resources in mode 2, the yellow highlighted part is the process related to the terminal performing Re-evaluation or Pre-emption detection according to the high-level configuration information.

(9) Discontinuous Reception (DRX) mechanism of NR Uu port

In a wireless network, when data needs to be transmitted, the User Equipment (UE) must always monitor the Physical Downlink Control Channel (PDCCH), and send and receive data according to the instruction message sent by the network side. In this way, the power consumption of the UE and the delay of data transmission are relatively large. Therefore, the 3GPP standard protocol introduces a discontinuous reception (DRX) mechanism to save energy.

Referring to Figure 9, the basic mechanism of DRX is to configure a DRX cycle (DRX cycle) for the UE in the Radio Resource Control Connected (Radio Resource Control Connected, RRC_CONNECTED) state. DRX cycle consists of "On Duration (continuous state)" and "Opportunity for DRX (DRX opportunity)". During the "On Duration" time, the UE monitors and receives the PDCCH, and the On Duration can be called an active period (Active Duration or Activetime). In "Opportunity for DRX", the UE does not receive PDCCH to reduce time power consumption. Opportunity for DRX can also be referred to as DRX off duration or Inactive time relative to DRX on duration. Relative to DRX on duration, Opportunity for DRX time can also be called DRX off duration (not receiving state).

In the DRX operation, the terminal controls the On Duration and Off Duration of the terminal according to some timer parameters configured by the network.

(10) DRX mechanism of SL

In the energy saving and consumption reduction mechanism of the terminal, in order to achieve the purpose of energy saving, a DRX mechanism, namely SL DRX, is introduced in the SL. Similar to the DRX mechanism of the Uu port, the terminal receives data sent by other terminals within the On duration range, and if no data is detected, it enters the sleep state within the DRX off duration range to save power consumption.

In the sideline transmission system based on SLDRX, if the receiver is configured with DRX, when the receiver receives the sideline data sent by the sender within the DRXonduration period, the timer will be activated. For example, drx-InactivityTimer is referred to as a first timer in this embodiment of the present application. Before the first timer expires, the receiving end is always in an active state (active time), that is, the sideline data sent by the transmitting end can be received. When the activator fails, the receiver turns into an inactive state (inactivetime).

Figure 10a shows the DRX pattern configured at the receiving end. Figure 10b shows that when the receiving end receives the PSCCH1/PSSCH1 sent by the transmitting end within the DRXonduration, the timer drx-InactivityTimer is activated, and the terminal is always in the active state until the timer expires. The sender can send PSCCH2/PSSCH2. Although the time of sending PSCCH2/PSSCH2 is within the DRXoffduration period of the receiver, it is within the valid time range of this timer drx-InactivityTimer (DRX deactivation timer), so the receiver can receive the PSCCH2/PSSCH2/PSSCH2. PSSCH2.

However, if the PSCCH1/PSSCH1 sent by the sender is not correctly received by the receiver, at this time, the receiver will consider that the sideline data sent by the sender has not been received within the DRXonduration period, and the timer drx-InactivityTimer will not be activated. In this case, the DRX pattern at the receiving end is shown in Figure 10a. The sender will consider that the receiver correctly receives the PSCCH1/PSSCH1 and activate or reset the timer drx-InactivityTimer, and the sender will send sideline data within the time when the timer is activated, such as sending PSCCH2/PSSCH2. If the PSCCH2 and PSSCH2 are within the DRXoffduration period of the receiver, the receiver cannot receive the data.

FIG. 11 is a schematic flowchart of a sideline transmission method 200 according to an embodiment of the present application. The method can optionally be applied to the systems shown in FIGS. 1 to 4 , but is not limited thereto. The method includes at least some of the following.

S210. In the case of receiving the first information from the second terminal, the first terminal sends the first physical sidelink control channel (PSSCH) within the time range when the first timer is activated. Wherein, the first timer is a timer determined according to the DRX configuration information of the sideline discontinuous reception.

In sideline communication, sideline data such as PSSCH and the like may be transmitted between terminals. Exemplarily, the terminal sending the PSSCH may be referred to as the first terminal (also referred to as the transmitter terminal or the transmitter), and the terminal receiving the PSSCH may be referred to as the second terminal (also referred to as the receiver terminal or the receiver). In this embodiment, the first terminal may determine whether the second terminal is in an active state based on whether it receives the first information from the second terminal. If the first information is received, the first terminal may consider that the second terminal has activated, started or restarted the first timer, and the second terminal is in an active state. Further, the first terminal may also obtain a time range in which the first timer is activated. Furthermore, the first terminal may send the first PSSCH to the second terminal within the time range when the first timer is activated, and the second terminal can receive the first PSSCH.

In the embodiment of the present application, the first terminal acquires the timer status of the second terminal according to the indication information sent by the second terminal, so as to determine whether the sideline data can be sent within the validity period of the timer, which is beneficial to ensure the sideline data. Transfer successfully.

Exemplarily, the time range for the activation of the first timer may include a time range from the moment when the first timer is started, restarted or reset to the time when the timer expires or stops counting.

Optionally, the first timer is a sideline DRX deactivation timer. Wherein, the side row deactivation timer may indicate that when the deactivation timer expires or stops timing, the second terminal switches to the deactivation state. The second terminal is in an active state within the time range in which the deactivation timer is activated. When the second terminal detects that there is sideline data sent to itself (for example, sideline data from the first terminal), it will start, activate or reset the deactivation timer.

Optionally, the first information includes first indication information; in the case of receiving the first information from the second terminal, the first terminal sends the first PSSCH within the time range when the first timer is activated, including: In the case of receiving the first indication information from the second terminal, the first terminal sends the first PSSCH to the second terminal within the time range when the first timer is activated.

Exemplarily, the second terminal may instruct the first terminal through the indication information, that is, the above-mentioned first indication information, that the second terminal activates, starts or restarts the first timer; or, the second terminal may indicate through the first indication information The first terminal sends the first PSSCH within the time range when the first timer is activated; alternatively, the second terminal may indicate through the first indication information that the second terminal is in an active state; alternatively, the second terminal may indicate through the first indication information that the The two terminals are within the activation time range of the first timer. After receiving the first indication information from the second terminal, the first terminal may send the first PSSCH to the second terminal within the time range when the first timer is activated.

Optionally, the first indication information is carried in at least one of sideline control information (SCI), medium access control (Medium Access Control, MAC) control element (Control Element, CE) or PC5-RRC signaling. Among them, the SCI can be a first-order SCI or a second-order SCI.

Optionally, the first indication information is used to indicate at least one of the following:

the second terminal activates the first timer;

The second terminal starts the first timer;

the second terminal resets the first timer;

the duration of the first timer;

the scope of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.

Optionally, the method further includes: the first terminal determines the start, activation or reset time of the first timer according to the time when the first indication information is received; The time of the indication information determines the start time of the activation of the first timer. For example, the time slot in which the first indication information is located or the start position or end position of the time slot is taken as the time of starting, activating or resetting the timer.

Optionally, the method further includes: the first terminal sends second indication information to the second terminal, where the second indication information is used to indicate whether the first timer needs to be sent when the first timer is started, activated or reset. an indication information; or, the second indication information is used to instruct the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an active state; or, indicates whether the second terminal is in the activation time range of the first timer.

For example, if the first terminal sends the second indication information to the second terminal, indicating that the first indication information needs to be sent when the first timer is started, activated or reset, after receiving the second indication information, the second terminal, The first indication information may be sent upon starting, activating or resetting the first timer. If the first terminal sends the second indication information to the second terminal, indicating that the first indication information does not need to be sent in the case of starting, activating or resetting the first timer, after receiving the second indication information, the second terminal will The first indication information will not be sent when the first timer is started, activated or reset.

Optionally, the second indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling. For example, the second indication information may be sent to the second terminal through PC5-RRC signaling when the first terminal and the second terminal establish a connection. For another example, the second indication information may be sent to the second terminal through the SCI or the MAC CE carried in the PSSCH. Among them, the SCI can be a first-order SCI or a second-order SCI.

Optionally, the second terminal acquires transmission resources, and sends the first indication information through the transmission resources. For example, in the first mode, the second terminal applies to the network for transmission resources, and uses the transmission resources allocated by the network to send the first indication information; in the second mode, the second terminal autonomously selects transmission resources from the resource pool, such as random Select transmission resources or select transmission resources by listening. This embodiment is not limited.

Optionally, the first indication information may be multiplexed with other sideline data to be sent in one PSSCH, or may be separately carried and sent in the PSSCH, which is not limited in this embodiment.

In this embodiment, the first information may not only be the first indication information, but also the sideline feedback information. Optionally, the first information includes sideline feedback information; wherein, the sideline feedback information is the sideline feedback information of the second PSSCH sent by the second terminal to the first terminal.

Optionally, the sideline data carried by the second PSSCH and the first PSSCH may be two different sideline data, or may be two retransmissions for one data packet, that is, the two transmissions may be the same data. The first PSSCH and the second PSSCH may represent two different sideline transmissions.

Optionally, as shown in FIG. 12 , the method further includes: S201. The first terminal sends the second PSSCH and the SCI associated with the second PSSCH to the second terminal, where the SCI indicates activation of sideline feedback.

Exemplarily, the first terminal may first send the second PSSCH and the SCI associated with the second PSSCH to the second terminal, where the SCI instructs the second terminal to activate sideline feedback. After receiving the second PSSCH and/or the SCI, the second terminal may activate sideline feedback. Specifically, the second terminal may start, activate or reset the first timer when receiving the SCI, and send sideline feedback information (including ACK) to the first terminal according to the detection result of the second PSSCH scheduled by the SCI or NACK). If the first terminal receives the sideline feedback information of the second terminal for the second PSSCH, the first terminal may consider that the second terminal has started or reset the first timer and is in an active state. And, further, the first terminal may also obtain a time range in which the first timer is activated. Furthermore, the first terminal sends the first PSSCH to the second terminal within the time range when the first timer is activated, and the second terminal can receive the first PSSCH. Wherein, SCI represents the first-order SCI and/or the second-order SCI.

Optionally, the sending, by the first terminal, the second PSSCH to the second terminal includes: the first terminal sending the second PSSCH within a time range when the second terminal is activated.

Optionally, the time range for activation of the second terminal is determined according to at least one of the following:

the time range of the first timer;

The time range of the second timer.

Optionally, the second timer is a lateral discontinuous reception active period timer drx-onDurationTimer.

Exemplarily, the first terminal may first send the second PSSCH and the SCI associated with the second PSSCH to the second terminal within the time range of the first timer or the time range of the second timer. After receiving the SCI, the second terminal may activate the first timer and send sideline feedback information to the first terminal. Wherein, SCI represents the first-order SCI and/or the second-order SCI.

It should be understood that, in this embodiment, the time range for activation of the second terminal may also be determined according to other timers, which is not limited in this application.

Optionally, in each of the foregoing embodiments, the method further includes: S202, the first terminal determines whether to receive the first information from the second terminal.

If yes, S203 can be executed; if no, it can continue to return to execute S202.

Optionally, the method further includes: S203. In the case of receiving the first information, the first terminal determines whether it is within the valid range of the first timer or the valid range of the second timer.

For example, it can be determined first whether it is within the valid range of the first timer. If it is within the valid range of the first timer, S210 may be performed. If it is not within the valid range of the first timer, then determine whether it is within the valid range of the second timer. If it is within the valid range of the second timer, S210 may be executed. If it is not within the valid range of the second timer, the loop continues to determine whether it is within the valid range of the second timer.

For another example, it is also possible to judge in parallel whether it is within the valid range of the first timer or the valid range of the second timer, and finally combine the judgment results of the two timers.

It should be understood that the present embodiment does not limit the sequence of judging whether it is within the valid range of the first timer or the valid range of the second timer.

Optionally, the method further includes:

S204. In the case of being within the valid range of the first timer or the valid range of the second timer, perform S210: the first terminal sends the first PSSCH to the second terminal.

Optionally, the method further includes:

The first terminal determines whether to receive the sideline feedback information from the second terminal.

Optionally, the method further includes: in the case that the sideline feedback information is not received, the first terminal determines a discontinuous transmission (Discontinuous Transmission, DTX) state. At this time, the first terminal considers that the second terminal has not activated the first timer, and will not send sideline data to the second terminal within the time range when the first timer is activated. Optionally, the first terminal determines whether it is within the time range of the second timer (ie, drx-onDurationTimer), and if so, the second terminal can send the first PSSCH, otherwise it cannot send the first PSSCH.

Optionally, the method further includes:

The first terminal stops sending sideline data within the valid range of the first timer in the case of determining the DTX state for N consecutive times.

Exemplarily, after the first terminal sends sideline data and activates the sideline feedback, when the second terminal successfully detects the PSCCH, it will send the PSFCH to the first terminal. The PSFCH may carry ACK or NACK, depending on whether the second terminal correctly detects the PSSCH scheduled by the PSCCH. However, in some cases, the first terminal may fail to detect the PSFCH, and the first terminal may consider it to be in the DTX state.

E.g:

Case 1. The second terminal sends the PSFCH, but the first terminal fails to detect, and the first terminal will consider it to be in the DTX state.

Case 2. Due to the transmission priority, although the second terminal detects the PSCCH, it does not transmit the PSFCH. At this time, the second terminal still activates the drx-InactivityTimer timer. However, the first terminal will not detect the PSFCH and will consider it to be in the DTX state.

In the above case, although the first terminal does not detect the PSFCH, it is considered to be in the DTX state. But the second terminal receives the SCI correctly and activates the timer. If the first terminal cannot send the sideline data within the validity period of the timer, it will cause waste of resources or increase the data transmission delay. Therefore, the first terminal can continue to send sideline data multiple times within the validity period of the timer. If the DTX is detected continuously for N times, the first terminal considers that the second terminal has not activated the timer, and in this case, stops sending data continuously.

In this embodiment of the present application, the first terminal sends sideline data to activate sideline feedback, and based on the detection of the PSFCH, it can be determined whether the receiving end activates the timer, which can prevent the second terminal from sending additional indication information to indicate the timer status and reduce signaling overhead. . In addition, in the case that the current resource pool does not support sideline feedback, the first terminal can also obtain the timer status of the second terminal according to the indication information sent by the second terminal, so as to determine whether the sending side can be sent within the validity period of the timer. row data.

Optionally, the method for determining the parameter N includes at least one of the following:

Determined according to pre-configuration;

Determined according to the network configuration information;

determined according to the third indication information of the second terminal;

determined according to the first parameter.

Optionally, the third indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.

Optionally, the first parameter includes at least one of the following:

Priority, reliability, delay, channel busy rate (ChannelBusyRatio, CBR) and logical channel identification (LogicalChannelIdentity, LCID).

Optionally, the corresponding relationship between the first parameter and the value of the parameter N may also be pre-configured or configured through the network, and the terminal determines the corresponding N value according to the first parameter.

Optionally, the method further includes: acquiring, by the first terminal, a duration and/or a range corresponding to the first timer.

Optionally, the method also includes at least one of the following:

sending, by the first terminal, configuration information for configuring the duration and/or range of the first timer to the second terminal;

The first terminal receives fourth indication information for indicating the duration and/or range of the first timer from the second terminal.

Exemplarily, the first terminal may acquire the duration and/or range corresponding to the first timer, for example, drx-InactivityTimer, by pre-configuring or by using a network configuration. Alternatively, the first terminal may configure the first timer for the second terminal through configuration information.

Exemplarily, the first terminal may acquire the duration and/or range of the first timer from the second terminal. For example, the first terminal receives the fourth indication information including the duration and/or the range of the first timer sent by the second terminal.

It should be understood that, in the above embodiment, the first terminal determines whether the first PSSCH can be sent within the time range when the first timer is activated according to whether the first information is received. The first PSSCH is sent within the active time frame. For example, if the first terminal determines that the second terminal is in an active state according to a second timer (drx-onDurationTimer), the first terminal may send the first PSSCH.

FIG. 13 is a schematic flowchart of a sideline transmission method 300 according to an embodiment of the present application. The method can optionally be applied to the systems shown in FIGS. 1 to 4 , but is not limited thereto. The method includes at least some of the following.

S310. The second terminal sends first information to the first terminal, where the first information is used to instruct the second terminal to activate, start or restart the first timer, or the first information is used to indicate that the first terminal is in The first physical sideline control channel PSSCH is sent within the time range when the first timer is activated, or the first information is used to indicate that the second terminal is in an active state, or the first information is used to indicate that the second terminal is in an active state within the activation time frame of the first timer. Wherein, the first timer is a timer determined according to the DRX configuration information of the sideline discontinuous reception.

In sideline communication, sideline data such as PSSCH and the like may be transmitted between terminals. Exemplarily, the terminal sending the PSSCH may be referred to as the first terminal (also referred to as the transmitter terminal or the transmitter), and the terminal receiving the PSSCH may be referred to as the second terminal (also referred to as the receiver terminal or the receiver). In this embodiment, the first terminal may determine whether the second terminal is in an active state based on whether it receives the first information from the second terminal. If the first terminal receives the first information, the first terminal may consider that the second terminal has activated, started or restarted the first timer, and the second terminal is in an active state. Further, the first terminal may also obtain a time range in which the first timer is activated. Furthermore, the first terminal sends the first PSSCH to the second terminal within the time range when the first timer is activated, and the second terminal can receive the first PSSCH.

Optionally, the first timer is a sideline DRX deactivation timer.

Optionally, the first information includes first indication information, where the first indication information is used to instruct the second terminal to activate, start or restart the first timer, or the first indication information is used to instruct the first terminal The first PSSCH is sent to the second terminal within the time frame when the first timer is activated.

Optionally, the first indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling. Among them, the SCI can be a first-order SCI or a second-order SCI.

Optionally, the first indication information is further used to indicate at least one of the following:

the duration of the first timer;

the scope of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.

In this embodiment, the second terminal may determine whether it is necessary to send the first indication information to the first terminal in various manners, which will be described separately below.

Optionally, in mode 1, the method further includes: the second terminal receives second indication information from the first terminal, where the second indication information is used to indicate that the first timer is being started, activated or reset Whether the first indication information needs to be sent in the case of Whether it is within the activation time frame of the first timer.

Optionally, the second indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling. Among them, the SCI can be a first-order SCI or a second-order SCI.

Optionally, in the second manner, the method further includes: the second terminal determines whether to send the first indication information according to fifth indication information, where the fifth indication information is used to indicate that the first indication information is being started, activated or reset. Whether the first indication information needs to be sent in the case of a timer.

Optionally, the fifth indication information is pre-configuration information or network configuration information.

Exemplarily, the second terminal determines, according to the pre-configuration information or the network configuration information, whether to send the first indication information to the first terminal when starting, activating or resetting the timer.

Optionally, the fifth indication information is in resource pool configuration information.

Exemplarily, fifth indication information is included in the resource pool configuration information. If the fifth indication information indicates that the first indication information needs to be sent when starting, activating or resetting the timer. When the second terminal receives sideline data sent by the first terminal in the resource pool, such as the second PSSCH and/or the SCI associated with the second PSSCH, the second terminal starts the first timer, and needs to send the first an instruction message. If the resource pool configuration information does not include the fifth indication information, or the fifth indication information in the resource pool configuration information indicates that the first indication information does not need to be sent when starting, activating or resetting the timer, the second terminal When starting the timer, it is not necessary to send the first indication information to the sender. Wherein, SCI represents the first-order SCI and/or the second-order SCI.

Optionally, in Manner 3, the method further includes: in the case where the sideline feedback resource is not configured in the resource pool configuration information, the second terminal determines that the first timer needs to be started, activated or reset. Send the first indication information.

Exemplarily, if the PSFCH feedback resource is not configured in the resource pool configuration information, the first terminal cannot instruct the second terminal to send the PSFCH by activating sideline feedback. Therefore, the second terminal needs to send the first indication information when starting, activating or resetting the timer.

For example, the PSFCH configuration information of the sidelink may include: sl-PSFCH-CandidateResourceType (candidate source type), sl-PSFCH-Period (period), sl-PSFCH-RB-Set (set) and other parameters.

If the parameter sl-PSFCH-Period is 0, it can indicate that the current resource pool does not support sideline feedback. In this case, when the second terminal starts, activates or resets the timer, it needs to send the first indication information to the first terminal.

If all bits of the parameter s1-PSFCH-RB-Set are 0, it can indicate that the frequency domain resources of the PSFCH are not allocated, and it can also be considered that the resource pool does not support sideline feedback. In this case, when the second terminal starts, activates or resets the timer, it needs to send the first indication information to the first terminal.

Optionally, in Manner 4, the method further includes: when the first terminal deactivates sideline feedback, the second terminal determines that the first timer needs to be sent when the first timer is started, activated or reset. first instruction information.

Exemplarily, if the resource pool is configured with sideline feedback resources, when the first terminal sends sideline data such as the second PSSCH, the deactivation of sideline feedback may be activated. If the transmitter deactivates the sideline feedback, the receiver will not send the PSFCH to the transmitter. In this case, if the receiver starts, activates or resets the timer, it needs to send the first indication information.

Optionally, the method further includes: the second terminal receives the second PSSCH from the first terminal and an SCI associated with the second PSSCH, where the SCI indicates activation of sideline feedback.

Exemplarily, the first terminal may first send the second PSSCH and the SCI associated with the second PSSCH to the second terminal, where the SCI instructs the second terminal to activate sideline feedback. After receiving the second PSSCH and the SCI, the second terminal may activate sideline feedback. Specifically, the second terminal may start, activate or reset the first timer when receiving the SCI, and send sideline feedback information to the first terminal according to the detection result of the PSSCH scheduled by the SCI. The SCI may be the first-order SCI carried in the PSCCH or the second-order SCI sent together with the PSSCH. If the first terminal receives the sideline feedback information of the second terminal for the second PSSCH, the first terminal may consider that the second terminal is in an active state. And, further, the first terminal may also obtain a time range in which the first timer is activated. Furthermore, the first terminal sends the first PSSCH to the second terminal within the time range when the first timer is activated, and the second terminal can receive the first PSSCH.

Optionally, the receiving, by the second terminal, the second PSSCH from the first terminal includes: receiving, by the second terminal, the second PSSCH sent by the first terminal within a time range in which the second terminal is activated.

the time range of the first timer;

The time range of the second timer.

Referring to the related description of FIG. 12 in the foregoing embodiment, the first terminal may determine whether to receive the first information from the second terminal. If the first information is received, the first terminal can also determine whether it is within the valid range of the first timer or the valid range of the second timer. If it is within the valid range of the first timer or the valid range of the second timer, the first terminal sends the first PSSCH to the second terminal again. In this way, the second terminal may receive the SCI associated with the second PSSCH and the second PSSCH sent by the first terminal within the time range of the activation of the second terminal, and further activate sideline feedback according to the SCI indication.

Optionally, the method further includes: the second terminal sends third indication information to the first terminal, where the third indication information includes a parameter N, where the N is used for the first terminal to detect the side sent by the second terminal Line feedback information, when it is determined that N consecutive DTX states, stop sending side line data within the valid range of the first timer.

Exemplarily, after the first terminal sends sideline data and activates the sideline feedback, when the second terminal successfully detects the PSCCH, it will send the PSFCH to the sending end. The PSFCH may carry ACK or NACK, depending on whether the second terminal correctly detects the PSSCH scheduled by the PSCCH. However, in some cases, the first terminal may fail to detect the PSFCH, and the first terminal may consider it to be in the DTX state. At this time, the first terminal considers that the second terminal has not activated the first timer, and will not send sideline data to the second terminal within the time range when the first timer is activated. Optionally, the first terminal determines whether it is within the time range of the second timer (ie, drx-onDurationTimer), and if so, the second terminal can send the first PSSCH, otherwise it cannot send the first PSSCH.

In addition, see the relevant descriptions on these cases in the above-mentioned embodiments. In these cases, although the first terminal does not detect the PSFCH, it is considered a DTX state. But it is possible that the second terminal received the SCI correctly and activated or reset the timer. If the first terminal cannot send the sideline data within the validity period of the timer, it will cause waste of resources or increase the data transmission delay. Therefore, the first terminal can continue to send sideline data multiple times within the validity period of the timer. If the DTX is detected continuously for N times, the first terminal considers that the second terminal has not activated the timer, and in this case, stops sending data continuously.

The above-mentioned parameter N also includes various determination methods, and for details, please refer to the relevant description of the above-mentioned embodiment.

Optionally, the method further includes: the second terminal sends fourth indication information to the first terminal, where the fourth indication information is used to indicate the duration and/or range of the first timer.

Exemplarily, the second terminal may notify the first terminal in various ways, for example, the duration and/or range of the first timer, such as drx-InactivityTimer. For example, the second terminal may inform the first terminal of the duration and/or range corresponding to the first timer by sending the indication information, that is, the fourth indication information. For another example, the second terminal may also carry the duration and/or range corresponding to the first timer in the first indication information.

For a specific example of the method 300 performed by the second terminal in this embodiment, reference may be made to the relevant description of the second terminal such as the receiving end in the foregoing method 200, which is not repeated here for brevity.

The following are several specific examples of the sideline transmission method in the embodiment of the present application. In the following examples, the first terminal is taken as the transmitting end terminal (may be referred to as the transmitting end for short), and the second terminal is the receiving end terminal (may be referred to as the receiving end for short) as an example for description.

Example 1: The sideline data sent by the sender activates the sideline feedback. If the sender receives the sideline feedback information (HARQACK or HARQNACK) for the sideline data, the sender can send the sideline data within the time range when the first timer is activated, otherwise it cannot send the sideline data within the time when the first timer is activated Send sideline data within range.

The first timer may be a timer determined according to the sideline DRX configuration information. For example, the first timer may be the sideline DRX deactivation timer.

Exemplarily, the time range in which the first timer is activated may be within the range of DRX off duration. The time range in which the first timer is activated may also be within the range of the DRX on duration.

Optionally, the sideline data sent by the transmitting end within the time range when the receiving end is activated activates the sideline feedback.

Exemplarily, the time range of the activation of the receiving end may include the time range of the activation of the first timer and/or the time range of the second timer. Wherein, the time range of the second timer may be the range of the side row DRXonduration.

For example, the upper part of FIG. 14 shows the DRX pattern configured at the receiving end. When the transmitting end transmits PSSCH1 and its associated first SCI within the DRXonduration period, sideline feedback is simultaneously activated. If the receiving end receives the first SCI, it will feed back HARQ-ACK (ACK or NACK) to the transmitting end through the PSFCH. However, if the receiver does not detect the first SCI, the PSFCH will not be sent. Wherein, the first SCI may be a first-order SCI and/or a second-order SCI. For example, information such as the ID of the receiver may be included in the second-order SCI. When the receiving end successfully detects the second-order SCI, it can determine whether the PSSCH is sent to itself according to the second-order SCI. If so, the receiver will activate or reset the first timer.

In addition, referring to the lower part of FIG. 14 , if the receiver correctly detects the first SCI, it will activate, start or reset a first timer, such as drx-InactivityTimer. The receiving end can judge whether the receiving end has correctly received the first SCI according to whether the PSFCH channel sent by the receiving end can be detected, and then judge whether the receiving end activates, starts or resets the first timer. If the transmitting end receives the PSFCH sent by the receiving end, it can be judged that the receiving end has correctly received the first SCI, and the timer drx-InactivityTimer is activated. Therefore, the transmitting end can send the PSSCH2 and its associated second SCI within the valid period of the timer or before the timer expires, so that the receiving end can receive the sideline data.

If the sender does not detect the PSFCH sent by the receiver, it is considered that the receiver has not correctly received the first SCI, and the receiver will not activate the timer drx-InactivityTimer. Therefore, the transmitting end cannot transmit the PSSCH2 and its associated second SCI within the time range when the first timer is activated.

If the receiver receives the second SCI, it will reset the drx-InactivityTimer timer to extend the activation time range. The sender can continue to send sideline data within the valid range of the timer. Optionally, the transmitting end also activates sideline feedback when sending PSSCH2 and its associated second SCI, and the above method can be used to determine whether the receiving end correctly receives the second SCI and whether to reset the timer.

Further, this example may include the following implementations:

Example 1-1: The sender sends sideline data and activates sideline feedback. If the transmitting end continuously detects DTX for N times, the transmitting end stops transmitting sideline data within the time range when the first timer is activated.

When the sideline feedback is activated at the transmitter, and the receiver successfully detects the SCI, it will send the PSFCH to the transmitter. The PSFCH can carry ACK or NACK, depending on whether the receiving end correctly detects the PSSCH scheduled by the SCI. However, in the following cases, the sender may fail to detect the PSFCH:

Case 1. The receiver sends the PSFCH, but the sender fails to detect it, and it will be considered as DTX.

Case 2. Due to the priority of sending, the receiving end does not send the PSFCH although it detects the SCI. At this point, the receiver will still activate the drx-InactivityTimer timer. However, the sender will not detect the PSFCH and will consider it as DTX.

For example, at the time of sending the PSFCH, the receiving end needs to send the uplink channel at the same time, and the priority of the uplink channel is higher than the priority corresponding to the PSFCH. At this time, the terminal will send the uplink channel instead of the PSFCH. For another example, the receiving end needs to send multiple PSFCHs at the same time, and the maximum number of PSFCHs that the terminal can send at the same time exceeds the maximum number of PSFCHs that the terminal can send at the same time, and the priority corresponding to the PSFCHs is low. The receiver will discard the PSFCH, that is, not send the PSFCH, but send other high-priority PSFCHs.

In the above case, although the sender does not detect the PSFCH, but the receiver correctly receives the SCI, the timer will be activated. In this state, if the sender cannot send sideline data within the validity period of the timer, resources will be wasted, or the data transmission delay will be increased. In this state, the sender can continue to send multiple sideline data within the validity period of the timer. If N times of DTX are detected continuously, it can be considered that the receiver has not activated the timer at this time, and thus stops sending data continuously.

Optionally, the parameter N can be determined according to any one or more of the following methods:

Mode 1. Determined according to pre-configuration or network configuration information. For example, the resource pool configuration information includes indication information, and the parameter N can be determined according to the indication information.

Mode 2. Determine according to the indication information (ie, the third indication information) of the receiving end. For example, the transmitting end determines the parameter N according to the indication information of the receiving end, and the indication information may be carried in the SCI, MACCE or PC5-RRC signaling.

Mode 3. Determine according to the first parameter.

For example, the first parameter is at least one of priority, reliability, delay, CBR, logical channel identification (LCID).

For another example, the corresponding relationship between the first parameter and the value of the parameter N is pre-configured or configured by the network, and the terminal determines the corresponding N value according to the first parameter.

Optionally, in this example, the sender may learn the duration and/or range corresponding to the first timer of the receiver (for example, the above-mentioned drx-InactivityTimer timer).

The timer may be configured by the sender to the receiver, that is, the sender sends configuration information to the receiver, where the configuration information is used to configure the first timer.

The timer may be determined by the receiving end, and the transmitting end receives the indication information (ie the fourth indication information) sent by the receiving end, and determines the duration and/or range corresponding to the first timer according to the indication information.

In this example, the sender can determine whether the receiver has correctly received the SCI and whether the timer has been started by detecting whether there is DTX in the PSFCH, so as to determine whether it can send sideline data to the receiver within the validity period of the timer. Therefore, signaling overhead caused by the receiving end sending the indication information of the timer can be avoided.

Example 2: The sender obtains the first indication information from the receiver. The sender determines, according to the first indication information, that the receiver activates the first timer.

In sideline transmission, the following situations exist: the sender sends sideline data, but does not activate sideline feedback; or, the resource pool is not configured with sideline feedback resources (no feedback resources, that is, the resource pool does not support sideline feedback). In at least one of the above cases, when the receiving end receives the sideline data sent by the transmitting end and starts, activates or resets the timer drx-InactivityTimer, the receiving end sends the first indication information to the transmitting end. The first indication information is used to indicate that the receiver has activated the timer. The sender can determine, according to the first indication information sent by the receiver, that the receiver has activated the timer. Therefore, the sender can send sideline data to the receiver before the timer expires.

Optionally, the first indication information is used to instruct the receiving end to start, activate or restart the first timer and/or to indicate the duration and/or range of the first timer. For example, the first indication information indicates that the receiver has activated the first timer; or the first indication information indicates the duration of the first timer, which implicitly indicates that the receiver has started, activated or restarted the first timer.

Optionally, the duration and/or range of the first timer starts from the time slot where the side-going channel carrying the first indication information is located. For example, the transmitting end receives the PSSCH sent by the receiving end in time slot n, and the first indication information is carried in the PSSCH, indicating that the duration of the first timer is 20 time slots, then the effective range of the first timer is 20 time slots starting from time slot n, namely [n, n+19]; or, the effective range of the first timer is 20 time slots starting from time slot n+1, namely [n+1, n+20].

Optionally, the first indication information is carried in SCI, MACCE or PC5-RRC signaling.

Optionally, in mode 2, the receiver can use the transmission resource to send the first indication information by autonomously selecting the transmission resource in the resource pool, otherwise the terminal sends a resource request to the network to request the network to allocate the transmission resource.

Optionally, in mode 1, if there are available transmission resources, such as transmission resources authorized by configuration, the receiving end can use the transmission resources to send the first indication information, otherwise the terminal sends a resource request to the network to request network allocation. transfer resources.

In this example, the receiver sends the timer indication information to the sender, indicating whether the receiver activates or starts the timer, and/or the parameter information of the timer, so that the sender can send the timer to the receiver within the valid time range of the timer. Side row data.

Example 3: Judgment condition for the receiver to determine whether it needs to send the first indication information to the sender

In the above example 1, the transmitting end can determine whether the receiving end has correctly received the SCI by activating the sideline feedback and detecting whether there is DTX, and then determine whether the receiving end has activated the first timer. At this time, the receiving end does not need to send indication information separately, which can reduce signaling overhead, improve resource utilization, and reduce system congestion. However, if the sideline feedback transmission resource is not configured in the resource pool, or the sender does not activate the sideline feedback, the method of example 2 needs to be adopted at this time. The receiving end informs the sending end whether the receiving end starts, activates or resets the timer by sending the first indication information, so that the sending end knows the timer status of the receiving end.

The receiving end can determine whether to send indication information for determining whether to start, activate or reset the timer to the sending end in the following manner.

Example 3-1: Preconfiguration Information or Network Configuration Information

The receiving end determines, according to the preconfigured information or the network configuration information, whether to send indication information to the transmitting end when starting, activating or resetting the timer.

For example, the resource pool configuration information includes indication information, that is, fifth indication information, where the fifth indication information is used to indicate that the receiver needs to send the first indication information when starting, activating or resetting the timer. The receiving end receives the sideline data sent by the sending end in the resource pool, starts a timer, and needs to send the first indication information to the sending end at this time. If the resource pool configuration information does not include the fifth indication information, or the fifth indication information in the resource pool configuration information indicates that the receiver does not need to send the first indication information when starting, activating or resetting the timer, then The receiver does not need to send the first indication information to the sender when starting the timer.

Example 3-2: Indication information of the sender, that is, the second indication information

The receiving end determines, according to the second indication information sent by the transmitting end, whether to send the first indication information when starting, activating or resetting the timer. For example, the second indication information may be sent to the receiving end through PC5-RRC signaling when the sending end and the receiving end establish a connection, or the second indication information may be sent to the receiving end through the SCI or the MACCE carried in the PSSCH . For example, when the second indication information indicates that the receiving end is starting, activating or resetting the timer and needs to send the first indication information, then when the receiving end starts, activates or resets the timer, it needs to send the first indication information to the transmitting end. an instruction message.

Example 3-3: Whether the resource pool is configured with sideline feedback resources

When the PSFCH feedback resource is not configured in the resource pool configuration information, the transmitter cannot make the receiver send the PSFCH by activating sideline feedback. Therefore, the receiver needs to send the first indication information when starting, activating or resetting the timer. For example, the parameter: SL-ResourcePool is included in the resource pool configuration information. The information element (ID) of this parameter is used to describe the configuration information of the NR sidelink communication resource pool (The IE SL-ResourcePool specifies the configuration information for NR sidelink communication resource pool.).

The following is an example of IE for SL-ResourcePool.

The following table is an example of the PSFCH configuration field description for the sidelink.

For example, when the parameter sl-PSFCH-Period takes a value of 0, it means that the current resource pool does not support sideline feedback. In this case, the receiver needs to send the first indication information when starting, activating or resetting the timer.

For another example, when all the bits of the parameter s1-PSFCH-RB-Set are 0, it means that the frequency domain resources of the PSFCH are not allocated, and it can also be considered that the resource pool does not support sideline feedback. In this case, the receiver needs to send the first indication information when starting, activating or resetting the timer.

Example 3-4: Whether the sender activates sideline feedback

If the resource pool is configured with sideline feedback resources, when the sender sends sideline data, it can activate and deactivate sideline feedback. If the transmitter activates the deactivated sideline feedback, the receiver will not send the PSFCH to the transmitter. In this case, if the receiving end starts, activates or resets the timer, it needs to send the first indication information.

In this example, the receiver may determine whether to send timer indication information to the sender according to pre-configuration information, network configuration information, sender indication information, resource pool configuration information, and the like.

In the embodiment of the present application, the transmitting end sends sideline data to activate the sideline feedback, and according to the detection of the PSFCH, it can be determined whether the receiving end activates the timer, which can prevent the receiving end from sending additional indication information to indicate the timer status and reduce signaling overhead. In addition, when the current resource pool does not support sideline feedback, the sender obtains the indication information sent by the receiver, and obtains the timer status of the receiver, so as to determine whether the sideline data can be sent within the validity period of the timer.

FIG. 15 is a schematic block diagram of a first terminal 400 according to an embodiment of the present application. The first terminal 400 may include:

The sending unit 410 is configured to send the first physical sideline control channel PSSCH within the time range when the first timer is activated when the first information from the second terminal is received. Wherein, the first timer is a timer determined according to the DRX configuration information of the sideline discontinuous reception.

In this embodiment, the first terminal may be a terminal that sends sidelink data such as PSSCH and the like in sidelink communication. The second terminal may be a terminal that receives sideline data in sideline communication.

Optionally, the first timer is a sideline DRX deactivation timer.

Optionally, the first information includes first indication information; the sending unit 410 is further configured to, in the case of receiving the first indication information from the second terminal, send the message to the The second terminal sends the first PSSCH.

Optionally, the first indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.

the second terminal activates the first timer;

The second terminal starts the first timer;

the second terminal resets the first timer;

the duration of the first timer;

the scope of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.

Optionally, as shown in FIG. 16 , the first terminal further includes: a first determination unit 420, configured to determine the start, activation or reset time of the first timer according to the time when the first indication information is received.

Optionally, the sending unit is further configured to send second indication information to the second terminal, where the second indication information is used to indicate whether the first indication needs to be sent in the case of starting, activating or resetting the first timer information; or, the second indication information is used to instruct the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an active state; or, indicates whether the second terminal is in the activation time range of the first timer.

Optionally, the second indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.

Optionally, the first information includes sideline feedback information; wherein, the sideline feedback information is the sideline feedback information of the second PSSCH sent by the second terminal to the first terminal.

Optionally, the sending unit is further configured to send the second PSSCH and the SCI associated with the second PSSCH to the second terminal, where the SCI indicates activation of sideline feedback.

Optionally, the sending unit is further configured to send the second PSSCH within the time range when the second terminal is activated.

the time range of the first timer;

The time range of the second timer.

Optionally, the first terminal further includes: a first judgment unit 430 for judging whether the first information from the second terminal is received.

Optionally, the first terminal further includes: a second judging unit 440, configured to judge whether it is within the valid range of the first timer or the valid range of the second timer when the first information is received .

Optionally, the sending unit is further configured to send, by the first terminal, the first PSSCH to the second terminal when the first terminal is within the valid range of the first timer or within the valid range of the second timer.

Optionally, the first terminal further includes: a third judging unit 450 for judging whether the sideline feedback information from the second terminal is received.

Optionally, the first terminal further includes: a second determining unit 460, configured to determine, by the first terminal, the discontinuous transmission DTX state in the case that the sideline feedback information is not received.

Optionally, the first terminal further includes: a stopping unit 470, configured to stop sending sideline data within the valid range of the first timer under the condition that N consecutive DTX states are determined.

Optionally, the manner of determining the N includes at least one of the following:

Determined according to pre-configuration;

Determined according to the network configuration information;

determined according to the first parameter.

Optionally, the first parameter includes at least one of the following:

Priority, reliability, delay, channel busy rate CBR and logical channel identification LCID.

Optionally, the first terminal further includes: an obtaining unit 480, configured to obtain the duration and/or range corresponding to the first timer.

Optionally, the first terminal further includes at least one of the following:

a configuration unit 490, configured for the first terminal to send configuration information for configuring the duration and/or range of the first timer to the second terminal;

A receiving unit 491, configured for the first terminal to receive fourth indication information from the second terminal that is used to indicate the duration and/or range of the first timer.

The first terminal 400 in this embodiment of the present application can implement the corresponding functions of the first terminal in the foregoing method embodiments. For the corresponding processes, functions, implementations, and beneficial effects of each module (sub-module, unit, or component, etc.) in the first terminal 400, reference may be made to the corresponding descriptions in the foregoing method embodiments, which will not be repeated here. It should be noted that the functions described by each module (submodule, unit, or component, etc.) in the first terminal 400 of the application embodiment may be implemented by different modules (submodule, unit, or component, etc.), or by the same module. A module (submodule, unit or component, etc.) implementation.

FIG. 17 is a schematic block diagram of a second terminal 500 according to an embodiment of the present application. The second terminal 500 may include: a sending unit 510, configured to send first information to the first terminal, where the first information is used to instruct the second terminal to activate, start or restart a first timer, or, the first The information is used to instruct the first terminal to send the first physical sidelink control channel PSSCH within the time range when the first timer is activated, where the first timer is a timer determined according to the sidelink discontinuous reception DRX configuration information .

Optionally, the first timer is a sideline DRX deactivation timer.

the duration of the first timer;

the scope of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.

Optionally, as shown in FIG. 18 , the second terminal further includes: a first receiving unit 520, configured to receive second indication information from the first terminal, where the second indication information is used to indicate that the startup, activation or Whether the first indication information needs to be sent when the first timer is reset; or, the second indication information is used to instruct the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an active state; or, indicates whether the second terminal is in the activation time range of the first timer.

Optionally, the second terminal further includes: a first determining unit 530, configured to determine whether to send the first indication information according to fifth indication information, wherein the fifth indication information is used to indicate that the start-up, activation or reset is in progress Whether the first indication information needs to be sent in the case of the first timer.

Optionally, the second terminal further includes: a second determining unit 540, configured to determine the case of starting, activating or resetting the first timer in the case that the sideline feedback resource is not configured in the resource pool configuration information Next, the first indication information needs to be sent.

Optionally, the second terminal further includes: a third determining unit 550, configured to determine that the first timer needs to be started, activated or reset when the first terminal deactivates the sideline feedback Send the first indication information.

Optionally, the second terminal further includes: a second receiving unit 560, configured to receive the second PSSCH from the first terminal and the SCI associated with the second PSSCH, where the SCI indicates activation of sideline feedback.

Optionally, the second receiving unit is further configured to receive the second PSSCH sent by the first terminal within the time range in which the second terminal is activated.

the time range of the first timer;

The time range of the second timer.

Optionally, the sending unit is further configured to send third indication information to the first terminal, where the third indication information includes a parameter N, and the N is used by the first terminal to detect the sideline feedback information sent by the second terminal , when it is determined that the DTX state is N consecutive times, stop sending sideline data within the valid range of the first timer.

Optionally, the sending unit is further configured to send fourth indication information to the first terminal, where the fourth indication information is used to indicate the duration and/or range of the first timer.

The second terminal 500 in this embodiment of the present application can implement the corresponding functions of the second terminal in the foregoing method embodiments. For the corresponding processes, functions, implementations, and beneficial effects of each module (submodule, unit, or component, etc.) in the second terminal 500, reference may be made to the corresponding descriptions in the above method embodiments, which are not repeated here. It should be noted that the functions described by each module (submodule, unit, or component, etc.) in the second terminal 500 of the application embodiment may be implemented by different modules (submodule, unit, or component, etc.), or by the same module. A module (submodule, unit or component, etc.) implementation.

FIG. 19 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so that the communication device 600 implements the methods in the embodiments of the present application.

Optionally, the communication device 600 may also include a memory 620 . The processor 610 may call and run a computer program from the memory 620, so that the communication device 600 implements the methods in the embodiments of the present application.

The memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .

Optionally, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices . Among them, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 600 may be the second terminal in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the second terminal in each method in the embodiment of the present application, which is not repeated here for brevity. Repeat.

Optionally, the communication device 600 may be the first terminal in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the first terminal in each method in the embodiment of the present application, which is not repeated here for brevity. Repeat.

FIG. 20 is a schematic structural diagram of a chip 700 according to an embodiment of the present application. The chip 700 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the methods in the embodiments of the present application.

Optionally, the chip 700 may further include a memory 720 . The processor 710 may call and run a computer program from the memory 720 to implement the method executed by the first terminal or the second terminal in the embodiment of the present application.

The memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .

Optionally, the chip 700 may further include an input interface 730 . The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740 . The processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the second terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second terminal in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the chip can be applied to the first terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first terminal in each method of the embodiment of the present application, which is not repeated here for brevity.

The chips applied to the second terminal and the first terminal may be the same chip or different chips.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC) or Other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.

The memory mentioned above may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM).

It should be understood that the above memory is an example but not a limitative description, 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) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

FIG. 21 is a schematic block diagram of a communication system 800 according to an embodiment of the present application. The communication system 800 includes a first terminal 810 and a second terminal 820 . The first terminal 810 is configured to, in the case of receiving the first information from the second terminal, send the first physical sideline control channel PSSCH within the time range when the first timer is activated, wherein the first timer is A timer determined according to the sideline DRX configuration information. The second terminal 820 is configured to send first information to the first terminal, where the first information is used to instruct the second terminal to activate, start or restart the first timer, or the first information is used to indicate the first timer The terminal sends the first physical sidelink control channel PSSCH within the time range when the first timer is activated, where the first timer is a timer determined according to the sidelink discontinuous reception DRX configuration information. The first terminal 810 may be used to implement the corresponding functions implemented by the first terminal in the above method, and the second terminal 820 may be used to implement the corresponding functions implemented by the second terminal in the above method. For brevity, details are not repeated here.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server, or data center (eg coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a Solid State Disk (SSD)), and the like.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A sideline transmission method, comprising:

In the case of receiving the first information from the second terminal, the first terminal sends the first physical sideline control channel PSSCH within the time range when the first timer is activated, wherein the first timer is based on the sideline Timer for discontinuous reception of DRX configuration information.
The method of claim 1, wherein the first timer is a sideline DRX deactivation timer.
The method according to claim 1 or 2, wherein the first information comprises first indication information;

In the case of receiving the first information from the second terminal, the first terminal sends the first PSSCH within the time range when the first timer is activated, including:

When the first terminal receives the first indication information from the second terminal, the first terminal sends the first PSSCH to the second terminal within the time range when the first timer is activated.
The method according to claim 3, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method according to claim 3 or 4, wherein the first indication information is used to indicate at least one of the following:

the second terminal activates the first timer;

the second terminal starts the first timer;

the second terminal resets the first timer;

the duration of the first timer;

the range of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.
The method according to any one of claims 3 to 5, wherein the method further comprises:

The first terminal determines the start, activation or reset time of the first timer according to the time when the first indication information is received.
The method according to any one of claims 3 to 6, wherein the method further comprises:

The first terminal sends second indication information to the second terminal, where the second indication information is used to indicate whether the first indication information needs to be sent when the first timer is started, activated or reset.
The method according to claim 7, wherein the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method according to claim 1 or 2, wherein the first information includes sideline feedback information; wherein the sideline feedback information is the second PSSCH sent by the second terminal for the first terminal Sideline feedback.
The method of claim 9, wherein the method further comprises:

The first terminal sends the second PSSCH and the SCI associated with the second PSSCH to the second terminal, where the SCI indicates activation of sideline feedback.
The method of claim 10, wherein sending the second PSSCH to the second terminal by the first terminal comprises:

The first terminal sends the second PSSCH within a time range when the second terminal is activated.
The method according to claim 11, wherein the time range of the activation of the second terminal is determined according to at least one of the following:

the time range of the first timer;

The time range of the second timer.
The method of any one of claims 1 to 12, wherein the method further comprises:

The first terminal determines whether to receive the first information from the second terminal.
The method of claim 13, wherein the method further comprises:

The first terminal determines whether it is within the valid range of the first timer or the valid range of the second timer when the first terminal receives the first information.
The method of claim 14, wherein the method further comprises:

The first terminal transmits the first PSSCH to the second terminal while being within the valid range of the first timer or within the valid range of the second timer.
The method of claim 12, 14 or 15, wherein the second timer is a lateral discontinuous reception active period timer drx-onDurationTimer.
The method of any one of claims 9 to 12, wherein the method further comprises:

The first terminal determines whether the sideline feedback information from the second terminal is received.
The method of claim 17, wherein the method further comprises:

In the case that the sideline feedback information is not received, the first terminal determines the discontinuous transmission DTX state.
The method of claim 18, wherein the method further comprises:

The first terminal stops sending sideline data within the valid range of the first timer in the case of determining the DTX state for N consecutive times.
The method according to claim 19, wherein the manner of determining N comprises at least one of the following:

Determined according to pre-configuration;

Determined according to the network configuration information;

determined according to the third indication information of the second terminal;

determined according to the first parameter.
The method according to claim 20, wherein the third indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of claim 21, wherein the first parameter comprises at least one of the following:

Priority, reliability, delay, channel busy rate CBR and logical channel identification LCID.
The method of any one of claims 1 to 22, wherein the method further comprises:

The first terminal acquires the duration and/or range corresponding to the first timer.
The method according to any one of claims 1 to 23, wherein the method further comprises at least one of the following:

sending, by the first terminal, configuration information for configuring the duration and/or range of the first timer to the second terminal;

The first terminal receives fourth indication information from the second terminal for indicating the duration and/or range of the first timer.
A sideline transmission method, comprising:

The second terminal sends first information to the first terminal, where the first information is used to instruct the second terminal to activate, start or restart the first timer, or the first information is used to instruct the first timer The terminal sends the first physical sidelink control channel PSSCH within the time range when the first timer is activated, where the first timer is a timer determined according to the sidelink discontinuous reception DRX configuration information.
The method of claim 25, wherein the first timer is a sideline DRX deactivation timer.
The method according to claim 25 or 26, wherein the first information includes first indication information, and the first indication information is used to instruct the second terminal to activate, start or restart a first timer, or The first indication information is used to instruct the first terminal to send the first PSSCH to the second terminal within the time range when the first timer is activated.
The method according to claim 27, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method according to claim 27 or 28, wherein the first indication information is further used to indicate at least one of the following:

the duration of the first timer;

the range of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.
The method of any one of claims 27 to 29, wherein the method further comprises:

The second terminal receives second indication information from the first terminal, where the second indication information is used to indicate whether the first timer needs to be sent in the case of starting, activating or resetting the first timer Instructions.
The method according to claim 30, wherein the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of any one of claims 27 to 31, wherein the method further comprises:

The second terminal determines whether to send the first indication information according to fifth indication information, where the fifth indication information is used to indicate whether to send the first timer in the case of starting, activating or resetting the first timer the first indication information.
The method according to claim 32, wherein the fifth indication information is pre-configuration information or network configuration information.
The method according to claim 32 or 33, wherein the fifth indication information is in resource pool configuration information.
The method of any one of claims 27 to 34, wherein the method further comprises:

In the case that the sideline feedback resource is not configured in the resource pool configuration information, the second terminal determines that the first indication information needs to be sent in the case of starting, activating or resetting the first timer.
The method of any one of claims 27 to 35, wherein the method further comprises:

When the first terminal deactivates the sideline feedback, the second terminal determines that the first indication information needs to be sent when the first timer is started, activated or reset.
The method according to claim 24 or 25, wherein the first information includes sideline feedback information; wherein the sideline feedback information is the second PSSCH sent by the second terminal for the first terminal Sideline feedback.
The method of claim 37, wherein the method further comprises:

The second terminal receives the second PSSCH from the first terminal and an SCI associated with the second PSSCH, the SCI indicating activation of sideline feedback.
The method of claim 38, wherein the second terminal receiving the second PSSCH from the first terminal comprises: the second terminal receiving the time when the first terminal was activated at the second terminal the second PSSCH sent within the range.
The method according to claim 39, wherein the time range of the activation of the second terminal is determined according to at least one of the following:

the time range of the first timer;

The time range of the second timer.
The method of claim 40, wherein the second timer is a lateral discontinuous reception active period timer drx-onDurationTimer.
The method of any one of claims 37 to 41, wherein the method further comprises:

The second terminal sends third indication information to the first terminal, where the third indication information includes a parameter N, where the N is used by the first terminal to detect the sideline feedback information sent by the second terminal , when it is determined that the DTX state is N consecutive times, stop sending sideline data within the valid range of the first timer.
The method according to claim 42, wherein the third indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of any one of claims 25 to 43, wherein the method further comprises:

The second terminal sends fourth indication information to the first terminal, where the fourth indication information is used to indicate the duration and/or range of the first timer.
A first terminal, comprising:

a sending unit, configured to send the first PSSCH within the time range when the first timer is activated in the case of receiving the first information from the second terminal, wherein the first timer is based on the sideline DRX configuration information definite timer.
The first terminal of claim 45, wherein the first timer is a sideline DRX deactivation timer.
The first terminal according to claim 45 or 46, wherein the first information comprises first indication information;

The sending unit is further configured to send the first PSSCH to the second terminal within the time range when the first timer is activated when the first indication information from the second terminal is received.
The first terminal according to claim 47, wherein the first indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.
The first terminal according to claim 47 or 48, wherein the first indication information is used to indicate at least one of the following:

the second terminal activates the first timer;

the second terminal starts the first timer;

the second terminal resets the first timer;

the duration of the first timer;

the range of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.
The first terminal according to any one of claims 47 to 49, wherein the first terminal further comprises:

A first determining unit, configured to determine the start, activation or reset time of the first timer according to the time when the first indication information is received.
The first terminal according to any one of claims 47 to 50, wherein the sending unit is further configured to send second indication information to the second terminal, where the second indication information is used to indicate that during startup, Whether the first indication information needs to be sent when the first timer is activated or reset.
The first terminal according to claim 51, wherein the second indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.
The first terminal according to claim 45 or 46, wherein the first information comprises sideline feedback information; wherein the sideline feedback information is a second message sent by the second terminal to the first terminal Sideline feedback information of PSSCH.
The first terminal according to claim 53, wherein the sending unit is further configured to send an SCI associated with the second PSSCH and the second PSSCH to the second terminal, the SCI indicating an active side row feedback.
The first terminal according to claim 54, wherein the sending unit is further configured to send the second PSSCH within a time range when the second terminal is activated.
The first terminal of claim 55, wherein the time range for activation of the second terminal is determined according to at least one of the following:

the time range of the first timer;

The time range of the second timer.
The first terminal according to any one of claims 45 to 56, wherein the first terminal further comprises:

A first judging unit, configured to judge whether the first information from the second terminal is received.
The first terminal of claim 57, wherein the first terminal further comprises:

The second judging unit is configured to judge whether it is within the valid range of the first timer or the valid range of the second timer when the first information is received.
The first terminal according to claim 58, wherein the sending unit is further configured to, in the case of being within the valid range of the first timer or the valid range of the second timer, the A terminal sends the first PSSCH to the second terminal.
The first terminal of claim 56, 58 or 59, wherein the second timer is a lateral discontinuous reception active period timer drx-onDurationTimer.
The first terminal according to any one of claims 53 to 56, wherein the first terminal further comprises:

A third judging unit, configured to judge whether the sideline feedback information from the second terminal is received.
The first terminal of claim 61, wherein the first terminal further comprises:

The second determining unit is configured to determine, by the first terminal, the DTX state of discontinuous transmission in the case that the sideline feedback information is not received.
The first terminal of claim 62, wherein the first terminal further comprises:

A stopping unit, configured to stop sending side line data within the valid range of the first timer under the condition that N consecutive DTX states are determined.
The first terminal according to claim 63, wherein the manner of determining the N comprises at least one of the following:

Determined according to pre-configuration;

Determined according to the network configuration information;

determined according to the third indication information of the second terminal;

determined according to the first parameter.
The first terminal according to claim 64, wherein the third indication information is carried in at least one of SCI, MAC CE, and PC5-RRC signaling.
The first terminal of claim 65, wherein the first parameter includes at least one of the following:

Priority, reliability, delay, channel busy rate CBR and logical channel identification LCID.
The first terminal according to any one of claims 45 to 66, wherein the first terminal further comprises:

an acquiring unit, configured to acquire the duration and/or range corresponding to the first timer.
The first terminal according to any one of claims 45 to 67, wherein the first terminal further comprises at least one of the following:

a configuration unit, configured to send, by the first terminal, configuration information for configuring the duration and/or range of the first timer to the second terminal;

A receiving unit, configured for the first terminal to receive fourth indication information from the second terminal for indicating the duration and/or range of the first timer.
A second terminal, comprising:

a sending unit, configured to send first information to the first terminal, where the first information is used to indicate that the second terminal has activated, started or restarted a first timer, or the first information is used to indicate the The first terminal sends the first PSSCH within the time range when the first timer is activated, where the first timer is a timer determined according to the sideline DRX configuration information.
The second terminal of claim 69, wherein the first timer is a sideline DRX deactivation timer.
The second terminal according to claim 69 or 70, wherein the first information includes first indication information, and the first indication information is used to instruct the second terminal to activate, start or restart the first timer , or the first indication information is used to instruct the first terminal to send the first PSSCH to the second terminal within the time range when the first timer is activated.
The second terminal according to claim 71, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The second terminal according to claim 71 or 72, wherein the first indication information is further used to indicate at least one of the following:

the duration of the first timer;

the range of the first timer;

the second terminal is in an active state;

The second terminal is within the activation time range of the first timer.
The second terminal according to any one of claims 71 to 73, wherein the second terminal further comprises:

a first receiving unit, configured to receive second indication information from the first terminal, where the second indication information is used to indicate whether it is necessary to send the first timer in the case of starting, activating or resetting the first timer first indication information.
The second terminal according to claim 74, wherein the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The second terminal according to any one of claims 71 to 75, wherein the second terminal further comprises:

a first determination unit, configured to determine whether to send the first indication information according to fifth indication information, wherein the fifth indication information is used to indicate whether to start, activate or reset the first timer The first indication information needs to be sent.
The second terminal according to claim 76, wherein the fifth indication information is pre-configuration information or network configuration information.
The second terminal according to claim 76 or 77, wherein the fifth indication information is in resource pool configuration information.
The second terminal according to any one of claims 71 to 78, wherein the second terminal further comprises:

The second determining unit is configured to determine that the first indication information needs to be sent in the case of starting, activating or resetting the first timer in the case that the sideline feedback resource is not configured in the resource pool configuration information.
The second terminal according to any one of claims 71 to 79, wherein the second terminal further comprises:

A third determining unit, configured to determine that the first indication information needs to be sent when the first timer is started, activated or reset when the sideline feedback is deactivated by the first terminal.
The second terminal according to claim 68 or 69, wherein the first information includes sideline feedback information; wherein the sideline feedback information is a second message sent by the second terminal to the first terminal Sideline feedback information of PSSCH.
The second terminal of claim 81, wherein the second terminal further comprises:

A second receiving unit, configured to receive the second PSSCH from the first terminal and the SCI associated with the second PSSCH, where the SCI indicates activation of sideline feedback.
The second terminal according to claim 82, wherein the second receiving unit is further configured to receive the second PSSCH sent by the first terminal within a time range in which the second terminal is activated.
The second terminal of claim 83, wherein the time range for the activation of the second terminal is determined according to at least one of the following:

the time range of the first timer;

The time range of the second timer.
The second terminal of claim 84, wherein the second timer is a lateral discontinuous reception active period timer drx-onDurationTimer.
The second terminal according to any one of claims 81 to 85, wherein the sending unit is further configured to send third indication information to the first terminal, the third indication information comprising a parameter N, the N is used for the first terminal to stop sending sideline data within the valid range of the first timer when the first terminal detects the sideline feedback information sent by the second terminal and determines N consecutive DTX states.
The second terminal according to claim 86, wherein the third indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The second terminal according to any one of claims 69 to 87, wherein the sending unit is further configured to send fourth indication information to the first terminal, where the fourth indication information is used to indicate the first terminal The duration and/or range of a timer.
A first terminal, comprising: a processor and a memory, the memory is used for storing a computer program, the processor is used for calling and running the computer program stored in the memory, so that the first terminal executes the method as claimed in claim 1 The method of any one of to 24.
A second terminal, 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, so that the second terminal executes the program as claimed in claim 25 The method of any one of to 44.
A chip, comprising: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed executes the method according to any one of claims 1 to 24.
A chip, comprising: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed performs the method as claimed in any one of claims 25 to 44.
A computer-readable storage medium for storing a computer program which, when executed by a device, causes the device to perform the method of any one of claims 1 to 24.
A computer-readable storage medium for storing a computer program which, when executed by a device, causes the device to perform the method of any one of claims 25 to 44.
A computer program product comprising computer program instructions that cause a computer to perform the method of any one of claims 1 to 24.
A computer program product comprising computer program instructions that cause a computer to perform the method of any of claims 25 to 44.
A computer program that causes a computer to perform the method of any one of claims 1 to 24.
A computer program that causes a computer to perform the method of any one of claims 25 to 44.