CN116325637A

CN116325637A - Sidestream transmission method and terminal

Info

Publication number: CN116325637A
Application number: CN202180070707.8A
Authority: CN
Inventors: 赵振山; 张世昌; 林晖闵
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2023-06-23
Also published as: WO2022165843A1

Abstract

The application relates to a sidestream transmission method and a terminal. The lateral line transmission method comprises the following steps: and the first terminal sends the first PSSCH in the time range of the activation of a first timer under the condition of receiving the first information from the second terminal, wherein the first timer is determined according to the sidestream Discontinuous Reception (DRX) configuration information. In the embodiment of the application, the first terminal acquires the timer state of the second terminal according to the indication information sent by the second terminal, so that whether the sidestream data can be sent within the time range of timer activation or not can be determined, and the sidestream data can be sent within the time range of timer activation, so that successful transmission of the sidestream data is guaranteed.

Description

Sidestream transmission method and terminal

Technical Field

The present application relates to the field of communications, and in particular, to a sidestream transmission method and a terminal.

Background

A discontinuous reception (Discontinuous Reception, DRX) mechanism is introduced in the Side Link (SL). The terminal may receive data transmitted by other terminals within the range of the DRX active period. If the terminal does not detect data, it may enter a sleep state within the sleep period of the DRX to save power consumption. In the SL DRX mechanism, successful transmission of sidestream data needs to be guaranteed.

Disclosure of Invention

The embodiment of the application provides a sidestream transmission method and a terminal, which can ensure successful transmission of sidestream data.

The embodiment of the application provides a sidestream transmission method, which comprises the following steps: and the first terminal sends a first physical sidelink control channel PSSCH in a time range activated by a first timer under the condition of receiving first information from the second terminal, wherein the first timer is determined according to the sidelink Discontinuous Reception (DRX) configuration information.

The embodiment of the application provides a sidestream transmission method, which comprises the following steps: 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 a first timer, or the first information is used to instruct the first terminal to send a first physical sideline control channel PSSCH within a time range in which the first timer is activated, where the first timer is a timer determined according to sideline discontinuous reception DRX configuration information.

The embodiment of the application provides a first terminal, which comprises: and a transmitting unit, configured to transmit a first physical sideline control channel PSSCH within a time range in which a first timer is activated, where the first timer is a timer determined according to sideline discontinuous reception DRX configuration information, when receiving first information from a second terminal.

The embodiment of the application provides a second terminal, which comprises: and the sending unit is used for sending first information to the first terminal, wherein the first information is used for indicating the second terminal to activate, start or restart a first timer, or the first information is used for indicating the first terminal to send a first physical sideline control channel PSSCH in a time range of the activation of the first timer, and the first timer is a timer determined according to the sideline Discontinuous Reception (DRX) configuration information.

The embodiment of the application provides a first terminal, which comprises 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 side transmission method executed by the first terminal.

The embodiment of the application provides a second terminal, which comprises 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 side transmission method executed by the second terminal.

The embodiment of the application provides a chip for realizing the lateral transmission method. Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device mounted with the chip executes the side-line transmission method.

The embodiment of the application provides a computer readable storage medium for storing a computer program, which when executed by a device, causes the device to perform the sidestream transfer method described above.

The embodiment of the application provides a computer program product, which comprises computer program instructions, wherein the computer program instructions enable a computer to execute the lateral transmission method.

The embodiment of the application provides a computer program which, when run on a computer, causes the computer to execute the sidestream transmission method.

In the embodiment of the application, the first terminal acquires the timer state of the second terminal according to the indication information sent by the second terminal, so that whether the sidestream data can be sent within the time range of timer activation or not can be determined, and the sidestream data can be sent within the time range of timer activation, so that successful transmission of the sidestream data is guaranteed.

Drawings

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

Fig. 2a is a schematic diagram of network coverage on-line communication.

Fig. 2b is a schematic diagram of partial network coverage sidestream communication.

Fig. 2c is a schematic diagram of network coverage outside line communications.

Fig. 3a is a schematic diagram of unicast transmissions.

Fig. 3b is a schematic diagram of multicast transmission.

Fig. 3c is a schematic diagram of a broadcast transmission.

Fig. 4 is a schematic diagram of side-by-side feedback.

Fig. 5 is a schematic diagram of a slot for side-row feedback.

Fig. 6 is a schematic view of the listening window and the selection window.

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

FIG. 8 is a schematic diagram of the Pre-emission mechanism.

Fig. 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 a reception end timer activated DRX.

Fig. 11 is a schematic flow chart diagram of a sidestream transport method according to an embodiment of the present application.

Fig. 12 is a schematic flow chart diagram of a sidestream transport method according to another embodiment of the present application.

Fig. 13 is a schematic flow chart diagram of a sidestream transport method according to an embodiment of the present application.

Fig. 14 is a schematic diagram comparing DRX configured by a receiving end with DRX of an activation timer in a sidestream 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 Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (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, evolved system of NR system, LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., and the embodiments of the present application may also be applied to these communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) fabric scenario.

Optionally, the communication system in the embodiments of the present application may be applied to unlicensed spectrum, where unlicensed spectrum may also be considered as shared spectrum; alternatively, the communication system in the embodiments of the present application may also be applied to licensed spectrum, where licensed spectrum may also be considered as non-shared spectrum.

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

The terminal device may be a Station (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle device, a wearable device, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In embodiments of the present application, the terminal device may be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various 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, where the network device may be an Access Point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or an Access Point, a vehicle device, a wearable device, and a network device (gNB) in an NR network, or a network device in a PLMN network for future evolution, or a network device in an NTN network, etc.

By way of example and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. Alternatively, the network device may be a base station disposed on land, in a water area, or the like.

In this embodiment of the present application, a network device may provide a service for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

Fig. 1 schematically illustrates a communication system 100. The communication system comprises one network device 110 and two terminal devices 120. Alternatively, the communication system 100 may include a plurality of network devices 110, and the coverage area 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), and the embodiment of the present application is not limited thereto. The network device may further include an access network device and a core network device. I.e. the wireless communication system further comprises a plurality of core networks for communicating with the access network devices. The access network device may be a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, an Access Point (AP), a transmission point (transmission point, TP), a new generation base station (new generation Node B, gNodeB), or the like of a Long Term Evolution (LTE) system, a Next Radio (NR) system, or an evolved base station (evolutional node B, which may be simply referred to as an eNB or an e-NodeB) in an licensed assisted access long term evolution (LAA-LTE) system.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application 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, where the network device and the terminal device may be specific devices in the embodiments of the present application, and are not described herein again; the communication device may also include other devices in the communication system, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, or the like.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description is given of related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as an alternative, which all belong to the protection scope of the embodiments of the present application.

(1) Sidestream communication in different network coverage environments:

in the sidestream communication, it is classified into various types according to the network coverage situation where the terminal performing the communication is located. For example, network overlay inboard communications, partial network overlay outboard communications, and network overlay outboard communications are shown in fig. 2a, 2b, and 2c, respectively.

As shown in fig. 2 a: in network coverage inside-side communication, all terminals performing side-side communication are in the coverage of the same base station, so that the terminals can perform side-side communication based on the same side-side configuration by receiving configuration signaling of the base station.

As shown in fig. 2 b: under the condition that part of the network covers the sidestream communication, part of terminals for sidestream communication are located in the coverage area of the base station. The terminal can receive the configuration signaling of the base station and perform side communication according to the configuration of the base station. And the terminal outside the coverage area of the network cannot receive the configuration signaling of the base station. In this case, the terminal outside the network coverage will determine the sidestream configuration according to the pre-configuration information and the information carried in the sidestream broadcast channel, such as the sidestream physical broadcast channel (Physical Sidelink Broadcast Channel, PSBCH), sent by the terminal located in the network coverage, for sidestream communication.

As shown in fig. 2 c: for network coverage outside line communication, all terminals for carrying out side line communication are located outside the network coverage, and all terminals determine side line configuration to carry out side line communication according to pre-configuration information.

(2)D2D/V2X：

Device-to-Device (D2D) communication is a transmission technology based on Side Links (SL). Unlike conventional cellular systems in which communication data is received or transmitted through a base station, D2D systems have higher spectral efficiency and lower transmission delay. The internet of vehicles (Vehicle to Everything, V2X) system employs a terminal-to-terminal direct communication approach.

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

First mode: the transmission resources of the terminal are allocated by the base station. And the terminal transmits data on the side link according to the resources allocated by the base station. The base station may allocate resources for 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 in the coverage area of the network, and the network allocates transmission resources for the terminal for side transmission.

Second mode: and the terminal selects one resource from the resource pool to transmit data. In fig. 2c, the terminal is located outside the coverage area of the cell, and the terminal autonomously selects transmission resources in the preconfigured resource pool to perform side transmission. Or, as shown in fig. 2a, the terminal autonomously selects transmission resources from a resource pool configured by the network to perform side transmission.

(3)NR-V2X：

In NR-V2X, automatic driving needs to be supported, and thus, higher demands are placed on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.

In LTE-V2X, a broadcast transmission scheme is supported, and in NR-V2X, unicast and multicast transmission schemes are introduced. For unicast transmission, there is only one receiving terminal (may be simply called receiving terminal), such as unicast transmission between UE1 and UE2 in fig. 3 a. For multicast transmission, the receiving end is all terminals in a communication group or all terminals in a certain transmission distance. As shown in fig. 3b, UE1, UE2, UE3 and UE4 form a communication group, wherein UE1 transmits data, and the other terminal devices in the group are all receiving end terminals. For the broadcast transmission scheme, the receiving end is any one of the terminals around the transmitting end terminal (which may be simply referred to as transmitting end). In fig. 3c, UE1 is a transmitting terminal, and other terminals around it, UE2-UE6 are receiving terminals.

(4) 2-order sidestream control information (Sidelink Control Information, SCI) mechanism in NR-V2X

The 2 nd order SCI was introduced into NR-V2X. The first-order SCI is carried in a physical sidelink control channel (Physical Sidelink Control Channel, PSCCH) and is used for indicating information such as transmission resources, reserved resource information, modulation coding scheme (Modulation and Coding Scheme, MCS) level, priority and the like of a physical sidelink shared channel (Physical Sidelink Shared Channel, PSCCH). The second-order SCI is transmitted in the resources of the PSSCH, and is demodulated using a demodulation reference signal (Demodulation Reference Signal, DMRS) of the PSSCH, and is used to indicate information for data demodulation, such as a sender Identifier (ID), a receiver ID, a hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) ID, a new data indicator (New Data Indicator, NDI), and the like.

(5) Side feedback channel:

in NR-V2X, a side-by-side feedback channel is introduced for improved reliability. For example, referring to fig. 4, for unicast transmission, a transmitting end terminal transmits sidelink data including a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH) to a receiving end terminal. The receiving end terminal transmits hybrid automatic repeat request (HARQ) feedback information to the transmitting end terminal. And the sending terminal judges whether retransmission is needed according to the feedback information of the receiving terminal. Wherein the HARQ feedback information is carried in a sidestream feedback channel, e.g. in a physical sidestream feedback channel (Physical Sidelink Feedback Channel, PSFCH).

The sidestream feedback may be activated or deactivated by pre-configuration information or network configuration information. If the sidestream feedback is activated, the receiving end terminal receives sidestream data transmitted by the transmitting end terminal, and feeds back HARQ ACK (acknowledgement) or NACK (Negative ACKnowledge, negative acknowledgement) to the transmitting end according to the detection result. And the sending terminal decides to send retransmission data or new data according to the feedback information of the receiving terminal. If the sidestream feedback is deactivated, the receiving terminal does not need to send feedback information, and the sending terminal generally adopts a blind retransmission mode to send data. For example, instead of deciding whether retransmission data needs to be transmitted according to feedback information of the receiving end terminal, the transmitting end terminal repeatedly transmits K times for each sidestream data.

(6) Resources of sidestream feedback channel

To reduce the overhead of the PSFCH channel, one slot defined in every N slots (slots) includes a PSFCH transmission resource, i.e., the period of the sidelink feedback resource is N slots. Where n=0, 1, 2, 4, parameter N is preconfigured or network configured. When n=0, this indicates that the resource pool is not configured with feedback resources, i.e. does not support sidestream feedback. A schematic diagram of n=4 can be seen in fig. 5, where the PSSCH transmitted in slots (slots) 2, 3, 4, 5 is transmitted in slot 7, so that slots {2, 3, 4, 5} can be considered as a set of slots. The PSSCH transmitted in the slot set has its corresponding PSFCH in the same slot.

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

(7) The resource selection method based on interception comprises the following steps:

in Mode2 (Mode 2) of NR-V2X, i.e. the second Mode described above, the terminal autonomously selects transmission resources from a pool of resources that are either pre-configured or configured by the network device. And the terminal performs resource selection based on the interception 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. Terminal determining listening window

And a selection window [ n+T ] ₁ ,n+T ₂ ]Wherein T is ₀ Representing the starting position of the listening window, and determining according to the configuration parameters;

the end position of the detection window is represented, and the end position is determined according to the processing time of the terminal; t (T) ₁ Indicating the starting position of the selection window,

parameters (parameters)

Determining according to the processing time of the terminal; t (T) ₂ Indicating the end position of the selection window, T _2min ≤T ₂ Residual packet delay budget (Packet Delay Budget, PDB), T _2min And determining according to the configuration parameters. And the terminal can determine the candidate resource set in the selection window according to the interception result in the interception window. Referring to FIG. 6, the listening window of the terminal may be in [ n-1000, n-1 ]Between, the selection window is [ n+1, n+100 ]]。

The process of selecting resources in the selection window by the terminal mainly comprises the following steps:

step 1, the terminal takes all available resources in the selection window as a set A.

And 2, if the terminal does not have a interception result of some subframes in the interception window, in the set A, the resources of the subframes corresponding to the subframes in the selection window are eliminated.

Step 3. If the terminal detects a PSCCH within the listening window, measuring the RSRP reference signal received power (Reference Signal Received Power, RSRP) of the PSCCH or measuring the RSRP of the PSCCH scheduled PSSCH. And if the measured RSRP is higher than the RSRP threshold and the reserved transmission resources thereof determined according to the reservation information in the control information have resource conflict with the data to be sent by the terminal, the resources are eliminated in 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 total number of resources (e.g., x=20), the terminal may raise the threshold of RSRP, e.g., 3dB, and repeat steps 1-3 until the number of resources remaining in set a is greater than X% of the total number of resources. Wherein X is a parameter of the high-level configuration.

And 5, reporting the set A to a high-rise by the terminal.

And 6, selecting resources from the set A by the high-level equal probability of the terminal to transmit data.

(8) Pre-preemption and Re-evaluation mechanisms in NR-V2X:

in LTE-V2X, a terminal selects transmission resources on which to transmit data. However, there is a possibility that two terminals select the same transmission resource, and at this time, resource collision occurs, which reduces system performance. In order to solve the problem, pre-project and Re-evaluation mechanisms are introduced in the NR-V2X, so that the terminal can judge whether resource conflict exists with other terminals before using the selected resources. If there is no collision, the selected transmission resources may continue to be used. If there is a resource conflict, avoidance and resource reselection are needed according to the corresponding mechanism to avoid the resource conflict.

NR-V2X supports Re-evaluation mechanism. After the terminal completes the selection of the resources, for the resources which have been selected but not indicated by the transmission side line control information, the resources may still be reserved by other terminals which burst non-periodic services, resulting in resource collision. In order to solve the problem, a Re-evaluation mechanism is provided, namely, the terminal still continuously listens to the sidestream control information after completing resource selection, and performs at least one reevaluation on the selected but not indicated resources.

An exemplary Re-evaluation mechanism is shown in fig. 7, where resource w, x, y, z, v is the time-frequency resource that the UE has selected, and resource x is located in slot m. Resources y and z for which the UE is about to send sidestream control information for the first time at resource x (resource x has been previously indicated by sidestream control information in resource w): the UE is at least in time slot m-T ₃ And performing primary resource interception, namely determining a resource selection window and an interception window, and performing resource elimination on resources in the resource selection window to obtain a candidate resource set. If the resource y or z is not in the candidate resource set, the UE reselects the time-frequency resource which is not in the candidate resource set in the resources y and z, and also reselects any selected but not passed the transmission side controlThe resource indicated by the information is made (i.e., although the higher layer has selected the resource, the resource is not indicated by the SCI). Such as any of the resources y, z, and v. T as described above ₃ Depending on the processing capabilities of the terminal.

NR-V2X supports a Pre-transmission mechanism, i.e., a resource preemption mechanism. In NR-V2X, the conclusion about the Pre-transmission mechanism is described in terms of preempted UEs. After the resource selection is completed, the UE still continuously listens for sidestream control information. Triggering a resource reselection if the time-frequency resources that have been selected and indicated by the transmission side row control information meet the following 3 conditions:

And 1. Overlapping the reserved resources in the detected sidestream control information with the selected and indicated resources of the UE, wherein the overlap comprises total overlap and partial overlap.

Condition 2. RSRP of PSCCH corresponding to side control information heard by ue or RSRP of PSCCH scheduled PSSCH is greater than SL RSRP threshold.

And 3, the priority carried in the detected sidestream control information is higher than the priority of the data to be sent by the UE.

An exemplary Pre-transmission mechanism is shown in fig. 8, where resource w, x, y, z, v is the time-frequency resource that the UE has selected, and resource x is located in slot m. For resources x and y indicated by the sidestream control information that the UE is about to send in slot m and that has been indicated by the sidestream control information sent previously by the UE: the UE is at least in time slot m-T ₃ And performing primary resource interception to determine a candidate resource set. If the resource x or y is not in the candidate resource set (satisfying the above conditions 1 and 2), it is further determined whether the resource x or y is not in the candidate resource set (satisfying the above condition 3) due to the indication of carrying the side control information of high priority. If yes, the UE executes resource re-selection and re-selects the time-frequency resources meeting the 3 conditions in x and y.

In the process of autonomously selecting transmission resources by the terminal in the mode 2, the yellow highlight part is the process of detecting and correlating Re-evaluation or Pre-evaluation by the terminal according to the high-level configuration information.

(9) Discontinuous reception (Discontinuous Reception, DRX) mechanism for NR Uu port

In a wireless network, when there is data to be transmitted, a User Equipment (UE) always monitors a physical downlink control channel (Physical Downlink Control Channel, PDCCH), and transmits and receives data according to an indication message sent by a network side. This results in a relatively large power consumption of the UE and a relatively large delay in data transmission. The 3GPP standard protocol therefore introduces a Discontinuous Reception (DRX) mechanism power saving policy.

Referring to fig. 9, a basic mechanism of DRX is to configure a DRX cycle (DRX cycle) for a UE in a radio resource control CONNECTED (Radio Resource Control Connected, rrc_connected) state. The DRX cycle consists of "On Duration" and "Opportunity for DRX (DRX opportunity)". During the "On Duration" time, the UE listens to and receives the PDCCH, and the On Duration may be referred to as an Active Duration or Active time. Within "Opportunity for DRX", the UE does not receive PDCCH to reduce time power consumption. Opportunity for DRX may also be referred to as a sleep period (DRX off duration) or Inactive period (Inactive time) with respect to DRX on duration. The Opportunity for DRX time relative to the DRX on duration may also be referred to as the DRX off duration (no receive state).

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

(10) DRX mechanism for SL

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

In the side transmission system based on SLDRX, if the receiving end configures DRX, a timer is activated when the receiving end receives side data sent by the sending end in a DRXOnduration period. Such as drx-InactigityTimer, is referred to as a first timer in the embodiments of the present application. Before the first timer fails, the receiving end is always in an active state (active time), and can receive the sidestream data sent by the sending end. When the activator fails, the receiving end turns to an inactive state (inactive time).

Fig. 10a is a DRX pattern configured at the receiving end. Fig. 10b shows that when the receiving end receives PSCCH1/PSSCH1 transmitted by the transmitting end in the drx duration, the timer drx-incaactytimer is activated, and the terminal is in an active state until the timer expires. The transmitting end may transmit PSCCH2/PSSCH2, and the receiving end may receive PSCCH2/PSSCH2 because the time of transmitting PSCCH2/PSSCH2 is within the DRX duration of the receiving end, but within the valid time range of the DRX-inactivity timer.

However, if PSCCH 1/psch 1 transmitted by the transmitting end is not correctly received by the receiving end, the receiving end considers that the sidestream data transmitted by the transmitting end is not received in the drx duration period, and does not activate the timer drx-incavitytimer. In this case, the DRX pattern of the receiving end is shown in fig. 10 a. The sender considers that the receiver correctly receives the PSCCH1/PSSCH1 and activates or resets the timer drx-incaactytimer, and the sender sends sideline data, e.g., PSCCH2/PSSCH2, during the time that the timer is activated. If the PSCCH2 and PSSCH2 are located in the DRXOffduration of the receiving end, the receiving end cannot receive the data.

Fig. 11 is a schematic flow chart diagram of a sidestream transport method 200 according to an embodiment of the present application. The method may alternatively be applied to the systems shown in fig. 1 to 4, but is not limited thereto. The method includes at least some of the following.

S210, when receiving the first information from the second terminal, the first terminal transmits a first physical sidelink control channel (PSSCH) within a time frame in which the first timer is activated. The first timer is a timer determined according to the sidestream Discontinuous Reception (DRX) configuration information.

In sidestream communication, sidestream data, such as PSSCH, etc., may be transmitted from terminal to terminal. For example, a terminal that transmits the PSSCH may be referred to as a first terminal (may also be referred to as a transmitting terminal or transmitting terminal), and a terminal that receives the PSSCH may be referred to as a second terminal (may also be referred to as a receiving terminal or receiving terminal). In this embodiment, the first terminal may determine whether the second terminal is in an active state based on whether the first information from the second terminal is received. If the first information is received, the first terminal can consider that the second terminal activates, starts or restarts the first timer, and the second terminal is in an activated state. Further, the first terminal may also obtain a time range for the activation of the first timer. Further, the first terminal may transmit the first PSSCH to the second terminal within a time range in which the first timer is activated, and the second terminal may be able to receive the first PSSCH.

In the embodiment of the application, the first terminal acquires the timer state of the second terminal according to the indication information sent by the second terminal, so that whether the sidestream data can be sent within the valid period of the timer can be determined, and successful transmission of the sidestream data is guaranteed.

For example, the time range for which the first timer is activated may include a time range from the time at which the first timer is started, restarted or reset to the time at which the timer is disabled or stopped.

Optionally, the first timer is a sidestream DRX deactivation timer. Wherein the sidestream deactivation timer may indicate that the second terminal transitions to the deactivated state when the deactivation timer expires or stops counting. The second terminal is in an active state within a time frame in which the deactivation timer is active. The second terminal may start, activate or reset the deactivation timer when it detects that there is sidestream data sent to itself (e.g., sidestream data from the first terminal).

Optionally, the first information includes first indication information; the first terminal transmitting a first PSSCH in a time range in which a first timer is activated in case of receiving first information from a second terminal, comprising: the first terminal transmits a first PSSCH to a second terminal within a time range in which the first timer is activated, upon receiving the first indication information from the second terminal.

The second terminal may instruct the first terminal, through the instruction information, that is, the first instruction information described above, to activate, start or restart the first timer; or the second terminal can instruct the first terminal to send the first PSSCH in the time range of the activation of the first timer through the first indication information; or the second terminal can indicate that the second terminal is in an activated state through the first indication information; or the second terminal may indicate, through the first indication information, that the second terminal is 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 a time range in which the first timer is activated.

Optionally, the first indication information is carried in at least one of a lateral Control information (SCI), a media access Control (Medium Access Control, MAC) Control Element (CE) or PC5-RRC signaling. Wherein the SCI may be a first order SCI or a second order SCI.

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

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;

a range of the first timer;

the second terminal is in an activated state;

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

Optionally, the method further comprises: the first terminal determines starting, activating or resetting time of the first timer according to the time of receiving the first indication information; or the first terminal determines the starting time of the activation of the first timer according to the time of receiving the first indication information. For example, the time slot in which the first indication information is located or the starting position or the ending position of the time slot in which the first indication information is located is used as the starting, activating or resetting time of the timer.

Optionally, the method further comprises: the first terminal sends second indicating information to the second terminal, wherein the second indicating information is used for indicating whether the first indicating information needs to be sent or not under the condition of starting, activating or resetting a first timer; or, the second indication information is used for indicating the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an activated state; or, whether the second terminal is within the activation time range of the first timer.

For example, if the first terminal transmits second indication information to the second terminal, indicating that the first indication information needs to be transmitted in the case of starting, activating or resetting the first timer, the second terminal may transmit the first indication information in the case of starting, activating or resetting the first timer after receiving the second indication information. If the first terminal sends the second indication information to the second terminal, the first indication information is not needed to be sent under the condition of starting, activating or resetting the first timer, and after the second terminal receives the second indication information, the first indication information is not sent under the condition of starting, activating or resetting the first timer.

Optionally, the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling. For example, the second indication information may be transmitted 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 transmitted to the second terminal through the SCI or the MACCE carried in the PSSCH. Wherein the SCI may be a first order SCI or a second order SCI.

Optionally, the second terminal acquires a transmission resource, and sends the first indication information through the transmission resource. For example, in the first mode, the second terminal applies for transmission resources to the network, and transmits the first indication information by using the transmission resources allocated by the network; in the second mode, the second terminal autonomously selects transmission resources in the resource pool, such as selecting transmission resources randomly or selecting transmission resources by interception. The present embodiment is not limited.

Alternatively, the first indication information may be multiplexed with other sidestream data and 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 be not only the first indication information but also the side feedback information. Optionally, the first information includes sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.

Alternatively, 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 side-row transmissions.

Optionally, as shown in fig. 12, the method further includes: s201, the first terminal sends a second PSSCH and an SCI associated with the second PSSCH to the second terminal, where the SCI indicates activation side feedback.

For example, the first terminal may first send the second PSSCH and an SCI associated with the second PSSCH to the second terminal, the SCI indicating that the second terminal activates sidestream feedback. After the second terminal receives the second PSSCH and/or the SCI, sidestream feedback may be activated. Specifically, the second terminal may start, activate or reset the first timer when receiving the SCI, and send side feedback information (including ACK or NACK) to the first terminal according to a detection result of the second PSSCH scheduled by the SCI. If the first terminal receives the sidestream feedback information of the second terminal aiming at the second PSSCH, the first terminal can consider that the second terminal starts or resets the first timer and is in an activated state. And, further, the first terminal may also obtain a time range for the activation of the first timer. Further, the first terminal transmits the first PSSCH to the second terminal in a time range in which the first timer is activated, and the second terminal can receive the first PSSCH. Wherein SCI means first order SCI and/or second order SCI.

Optionally, the first terminal sends the second PSSCH to the second terminal, including: the first terminal transmits the second PSSCH in a time range in which the second terminal is active.

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

a time range of the first timer;

time range of the second timer.

Optionally, the second timer is a sidelink discontinuous reception activation period timer drx-onduration timer.

Illustratively, the first terminal may first transmit the second PSSCH and the SCI associated with the second PSSCH to the second terminal in the time range of the first timer or the time range of the second timer. After receiving the SCI, the second terminal may activate a first timer and send side feedback information to the first terminal. Wherein SCI means first order SCI and/or second order SCI.

It should be understood that, in this embodiment, the time range of the 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 above embodiments, the method further includes: s202, the first terminal judges whether the first information from the second terminal is received or not.

If so, S203 may be performed; if not, execution may continue back to S202.

Optionally, the method further comprises: and S203, the first terminal judges whether the first terminal is in the effective range of the first timer or the effective range of the second timer when receiving the first information.

For example, it may be determined 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 the first timer is not within the valid range of the first timer, judging whether the first timer is within the valid range of the second timer. If it is within the valid range of the second timer, S210 may be performed. If the second timer is not within the valid range of the second timer, the recirculation decision is continued to determine if the second timer is within the valid range of the second timer.

For another example, whether the first timer is within the effective range of the second timer or not may be determined in parallel, and finally the determination results of the two timers may be integrated.

It should be understood that the present embodiment is not limited to determining whether the sequence is within the valid range of the first timer or the valid range of the second timer.

Optionally, the method further comprises:

s204, when the first timer is within the valid range or the second timer is within the valid range, S210 is executed: the first terminal transmits the first PSSCH to the second terminal.

Optionally, the method further comprises:

the first terminal judges whether the sidestream feedback information from the second terminal is received.

Optionally, the method further comprises: in the event that the sidestream 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 does not activate the first timer, and does not transmit sidestream data to the second terminal within the time range in which the first timer is activated. Optionally, the first terminal determines whether the first PSSCH is within the time range of the second timer (i.e., drx-onduration timer), if so, the second terminal may send the first PSSCH, otherwise, it cannot send the first PSSCH.

Optionally, the method further comprises:

the first terminal stops transmitting sidestream data within the effective range of the first timer when determining continuous N DTX states.

Illustratively, the first terminal transmits the sidestream data, and after the sidestream feedback is activated, the second terminal transmits the PSFCH to the first terminal when the second terminal successfully detects the PSCCH. The PSFCH may carry an ACK or NACK depending on whether the second terminal correctly detects the PSCCH scheduled PSSCH. In some cases, however, the first terminal may fail to detect the PSFCH, and the first terminal may consider the DTX state.

For example:

case 1. The second terminal transmits the PSFCH, but the first terminal fails to detect, and the first terminal may consider to be in DTX state.

Case 2. The second terminal does not transmit the PSFCH, although the PSCCH is detected, due to the transmission priority. At this time, the second terminal still activates the drx-InactvityTimer timer. But the first terminal will not detect the PSFCH and will be considered as DTX status.

In the above case, the first terminal is considered as a DTX state although it does not detect the PSFCH. But the second terminal correctly receives the SCI, a timer is activated. If the first terminal cannot send the sidestream data in the valid period of the timer, resource waste is caused or data transmission delay is increased. Therefore, the first terminal can continue to transmit the sidestream data multiple times within the expiration period of the timer. If N DTX is continuously detected, the first terminal considers that the second terminal does not activate the timer, and stops sending data continuously.

In the embodiment of the application, the first terminal sends the sidestream data to activate sidestream feedback, and whether the receiving end activates the timer can be judged according to the PSFCH detection, so that the second terminal can be prevented from sending additional indication information to indicate the state of the timer, and signaling overhead is reduced. In addition, under the condition that the current resource pool does not support sidestream feedback, the first terminal can also acquire the timer state of the second terminal according to the indication information sent by the second terminal, so that whether sidestream data can be sent within the valid period of the timer can be determined.

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

determined according to a pre-configuration;

determining according to the network configuration information;

determining according to third indication information of the second terminal;

determined from the first parameter.

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

Optionally, the first parameter includes at least one of:

priority, reliability, latency, 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 be preconfigured or configured through a network, and the terminal determines the corresponding value of N according to the first parameter.

Optionally, the method further comprises: the first terminal obtains the duration and/or the range corresponding to the first timer.

Optionally, the method further comprises at least one of:

the first terminal sends 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, wherein the fourth indication information is used for indicating the duration and/or the range of the first timer.

For example, the first terminal may obtain, in a preconfigured manner or by means of network configuration, a duration and/or a range corresponding to the first timer, for example, drx-incavitytimer. Alternatively, the first terminal may configure the first timer for the second terminal through the configuration information.

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

It should be understood that in the above embodiment, the first terminal determines whether the first PSSCH can be transmitted within the time range of the activation of the first timer according to whether the first information is received, and it is not excluded that the first terminal transmits the first PSSCH within the time range of the activation determined according to other timers. For example, the first terminal determines that the second terminal is in an active state according to a second timer (drx-onduration timer), and the first terminal may transmit the first PSSCH.

Fig. 13 is a schematic flow chart diagram of a sidestream transport method 300 according to an embodiment of the present application. The method may alternatively be applied to the systems shown in fig. 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, wherein the first information is used for indicating that the second terminal activates, starts or restarts a first timer, or the first information is used for indicating that the first terminal sends a first physical sideline control channel PSSCH within the time range of the activation of the first timer, or the first information is used for indicating that the second terminal is in an activated state, or the first information is used for indicating that the second terminal is within the activation time range of the first timer. The first timer is a timer determined according to the sidestream Discontinuous Reception (DRX) configuration information.

In sidestream communication, sidestream data, such as PSSCH, etc., may be transmitted from terminal to terminal. For example, a terminal that transmits the PSSCH may be referred to as a first terminal (may also be referred to as a transmitting terminal or transmitting terminal), and a terminal that receives the PSSCH may be referred to as a second terminal (may also be referred to as a receiving terminal or receiving terminal). In this embodiment, the first terminal may determine whether the second terminal is in an active state based on whether the first information from the second terminal is received. If the first terminal receives the first information, the first terminal can consider that the second terminal activates, starts or restarts the first timer, and the second terminal is in an activated state. Further, the first terminal may also obtain a time range for the activation of the first timer. Further, the first terminal transmits the first PSSCH to the second terminal in a time range in which the first timer is activated, and the second terminal can receive the first PSSCH.

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

Optionally, the first information includes first indication information, where the first indication information is used to indicate that the second terminal activates, starts or restarts a first timer, or the first indication information is used to indicate that the first terminal sends a first PSSCH to the second terminal in a time range in which the first timer is activated.

Optionally, the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling. Wherein the SCI may 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 duration of the first timer;

a range of the first timer;

the second terminal is in an activated state;

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

In this embodiment, the second terminal may determine whether the first indication information needs to be sent to the first terminal in various manners, which will be described below.

Optionally, in a first aspect, the method further includes: the second terminal receives second indication information from the first terminal, wherein the second indication information is used for indicating whether the first indication information needs to be sent under the condition of starting, activating or resetting the first timer; or the second indication information is used for indicating the second terminal to send first indication information, and the first indication information indicates whether the second terminal is in an activated state or whether the second terminal is in an activated time range of the first timer.

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

Optionally, in the second mode, the method further includes: the second terminal determines whether to transmit the first indication information according to fifth indication information, wherein the fifth indication information is used for indicating whether to transmit the first indication information under the condition of starting, activating or resetting the first timer.

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

The second terminal determines, illustratively, whether the first indication information needs to be sent to the first terminal when the timer is started, activated or reset according to the pre-configuration information or the network configuration information.

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

Illustratively, in the resource pool configuration information, fifth indication information is included. If the fifth indication information indicates that the first indication information needs to be transmitted when the timer is started, activated or reset. The second terminal starts a first timer when receiving sidestream data, such as a second PSSCH and/or SCI associated with the second PSSCH, sent by the first terminal in the resource pool, and needs to send first indication information to the first terminal at this time. If the fifth indication information is not included in the resource pool configuration 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 the timer is started, activated or reset, the second terminal does not need to send the first indication information to the sending end when the timer is started. Wherein SCI means first order SCI and/or second order SCI.

Optionally, in the third mode, the method further includes: and the second terminal determines that the first indication information needs to be sent under the condition of starting, activating or resetting the first timer under the condition that the sidestream feedback resources are not configured in the resource pool configuration information.

For example, 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 the sidelink feedback mode. Therefore, the second terminal needs to transmit the first indication information when starting, activating or resetting the timer.

For example, the PSFCH configuration information for the side link may include: parameters such as sl-PSFCH-Candida resource type, sl-PSFCH-Period, sl-PSFCH-RB-Set, etc.

If the value of the parameter sl-PSFCH-Period is 0, the current resource pool can be indicated not to support sidestream feedback. In this case, the second terminal needs to transmit the first indication information to the first terminal when starting, activating or resetting the timer.

If all bits of the parameter sl-PSFCH-RB-Set are 0, the resource pool can be considered to not support side-line feedback, or the frequency domain resource of the PSFCH is not allocated. In this case, the second terminal needs to transmit the first indication information to the first terminal when starting, activating or resetting the timer.

Optionally, in the fourth mode, the method further includes: the second terminal determines that the first indication information needs to be sent when the first timer is started, activated or reset under the condition that the first terminal deactivates sidestream feedback.

For example, if the resource pool is configured with sidestream feedback resources, deactivation of sidestream feedback may be activated when the first terminal transmits sidestream data, e.g., the second PSSCH. If the sender deactivates the sidestream feedback, the receiver does not send the PSFCH to the sender. In this case, if the receiving end starts, activates or resets the timer, it is necessary to transmit the first indication information.

Optionally, 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 side feedback.

For example, the first terminal may first send the second PSSCH and an SCI associated with the second PSSCH to the second terminal, the SCI indicating that the second terminal activates sidestream feedback. After the second terminal receives the second PSSCH and the SCI, the sidestream feedback may be activated. Specifically, the second terminal may start, activate or reset the first timer when receiving the SCI, and send side feedback information to the first terminal according to a detection result of the PSSCH scheduled by the SCI. Wherein the SCI may be a first order SCI carried in the PSCCH or a second order SCI transmitted with the PSSCH. If the first terminal receives the sidestream feedback information of the second terminal aiming at the second PSSCH, the first terminal can consider that the second terminal is in an activated state. And, further, the first terminal may also obtain a time range for the activation of the first timer. Further, the first terminal transmits the first PSSCH to the second terminal in a time range in which the first timer is activated, and the second terminal can receive the first PSSCH.

Optionally, the second terminal receives the second PSSCH from the first terminal, including: the second terminal receives the second PSSCH transmitted by the first terminal in the time range of the second terminal activation.

a time range of the first timer;

time range of the second timer.

Referring to the related description about fig. 12 in the above embodiment, it may be determined at the first terminal whether the first information from the second terminal is received. The first terminal may also determine whether it is within the valid range of the first timer or the valid range of the second timer if the first information is received. If the first PSSCH is within the effective range of the first timer or the effective range of the second timer, the first terminal transmits the first PSSCH to the second terminal. In this way, the second terminal may receive the SCI associated with the second PSSCH, which is sent by the first terminal in the time range in which the second terminal is activated, and further activate side feedback according to the SCI indication.

Optionally, the method further comprises: the second terminal sends third indication information to the first terminal, wherein the third indication information comprises a parameter N, and the N is used for stopping sending sidestream data within the effective range of the first timer when the first terminal detects sidestream feedback information sent by the second terminal and determines continuous N times of DTX states.

Illustratively, after the first terminal sends the sidestream data and activates the sidestream feedback, the second terminal sends the PSFCH to the sender when it successfully detects the PSCCH. The PSFCH may carry an ACK or NACK depending on whether the second terminal correctly detects the PSCCH scheduled PSSCH. In some cases, however, the first terminal may fail to detect the PSFCH, and the first terminal may consider the DTX state. At this time, the first terminal considers that the second terminal does not activate the first timer, and does not transmit sidestream data to the second terminal within the time range in which the first timer is activated. Optionally, the first terminal determines whether the first PSSCH is within the time range of the second timer (i.e., drx-onduration timer), if so, the second terminal may send the first PSSCH, otherwise, it cannot send the first PSSCH.

Further, see the relevant description of these cases in the above embodiments. In these cases, the first terminal is considered to be in a DTX state, although it does not detect the PSFCH. But it is possible that the second terminal has correctly received the SCI and activated or reset the timer. If the first terminal cannot send the sidestream data in the valid period of the timer, resource waste is caused or data transmission delay is increased. Therefore, the first terminal can continue to transmit the sidestream data multiple times within the expiration period of the timer. If N DTX is continuously detected, the first terminal considers that the second terminal does not activate the timer, and stops sending data continuously.

The above parameter N also includes a plurality of determination manners, and particularly, reference may be made to the related description of the above embodiment.

Optionally, the method further comprises: the second terminal sends fourth indication information to the first terminal, wherein the fourth indication information is used for indicating the duration and/or the range of the first timer.

The second terminal may inform the first terminal of the duration and/or range of the first timer, e.g. drx-inactivity timer, in various ways, for example. For example, the second terminal may inform the duration and/or the range corresponding to the first timer by sending indication information, i.e. fourth indication information, to the first terminal. For another example, the second terminal may also carry the duration and/or the range corresponding to the first timer in the first indication information.

Specific examples of the second terminal execution method 300 in this embodiment may be referred to the above description of the method 200 about the second terminal, such as the receiving end, and for brevity, will not be repeated here.

The following are several specific examples of the sidestream transmission method of the embodiment of the present application. In the following examples, a first terminal is taken as a transmitting terminal (may be abbreviated as a transmitting terminal), and a second terminal is taken as a receiving terminal (may be abbreviated as a receiving terminal).

Example 1: and the sidestream data sent by the sending end activates sidestream feedback. If the transmitting end receives sidestream feedback information (harq ack or harq nack) for the sidestream data, the transmitting end may transmit the sidestream data within the time range in which the first timer is activated, otherwise, the sidestream data cannot be transmitted within the time range in which the first timer is activated.

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

For example, the time range of the first timer activation may be within the range of the DRX off duration. The time range of the first timer activation may also be within the range of the DRX on duration.

Optionally, the transmitting end activates the sidestream feedback by sending sidestream data within the time range of the receiving end activation.

For example, 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. The time range of the second timer may be a range of sidestream DRXondurations.

For example, the upper part of fig. 14 shows a DRX pattern configured by the receiving end. And when the transmitting end transmits PSSCH1 and the first SCI related to the PSSCH1 in the DRXOnduce period, the transmitting end activates sidestream feedback. If the receiving end receives the first SCI, the receiving end feeds back HARQ-ACK (ACK or NACK) to the sending end through PSFCH. And if the receiving end does not detect the first SCI, the PSFCH is not transmitted. Wherein the first SCI may be a first order SCI and/or a second order SCI. For example, the second-order SCI may include information such as the ID of the receiving end. The receiving end can determine whether the PSSCH is transmitted to itself according to the second-level SCI in case that the second-level SCI is successfully detected. If so, the receiving end activates or resets the first timer.

In addition, referring to the lower part of fig. 14, if the receiving end correctly detects the first SCI, a first timer, such as drx-incaactyitytimer, is activated, started or reset. The receiving end can judge whether the receiving end correctly receives the first SCI according to whether the PSFCH channel sent by the receiving end can be detected, and further judge whether the receiving end activates, starts or resets the first timer. If the sender receives the PSFCH sent by the receiver, it can determine that the receiver correctly receives the first SCI, and activates the timer drx-InactityTimer. Therefore, the transmitting end can send PSSCH2 and its associated second SCI during the timer validity period or before the timer expires, so that the receiving end can receive the sidestream data.

If the sending end does not detect the PSFCH sent by the receiving end, the receiving end is considered to not correctly receive the first SCI, and the receiving end also does not activate a timer drx-InactivityTimer. The transmitting end cannot transmit PSSCH2 and its associated second SCI within the time frame of the first timer activation.

If the receiving end receives the second SCI, the receiving end resets the drx-InactivityTimer timer, and prolongs the activation time range. The sender may continue to send sidestream data within the timer's effective range. Optionally, the transmitting end activates the side feedback when transmitting PSSCH2 and its associated second SCI, and by using the above method, it can be determined whether the receiving end correctly receives the second SCI and resets the timer.

Further, the present example may include the following embodiments:

example 1-1: the transmitting end transmits the sidestream data and activates sidestream feedback. If the transmitting end continuously detects N DTX, the transmitting end stops transmitting the sidestream data within the time range of the activation of the first timer.

When the transmitting end activates sidestream feedback and the receiving end successfully detects SCI, PSFCH is sent to the transmitting end. The PSFCH may carry an ACK or NACK depending on whether the receiving end correctly detects the SCI scheduled PSSCH. But the sender may fail to detect the PSFCH in the following cases:

Case 1. The receiving end transmits PSFCH, but the transmitting end fails to detect and is considered DTX.

Case 2. The receiving end does not transmit PSFCH, although SCI is detected, due to the transmission priority. At this time, the receiver still activates the drx-InactigityTimer timer. But the transmitting end will not detect the PSFCH and will be considered as DTX.

For example, at the time of sending the PSFCH, the receiving end needs to send an uplink channel at the same time, and the priority of the uplink channel is higher than the priority corresponding to the PSFCH. At this point the terminal will send the upstream channel and not the PSFCH. For another example, the receiving end needs to send multiple PSFCHs at the same time, and exceeds the number of PSFCHs that the terminal can send at most at the same time, and the priority corresponding to the PSFCH is low. The receiving end discards the PSFCH, i.e., does not send the PSFCH, but sends other high priority PSFCHs.

In the above case, although the transmitting end does not detect the PSFCH, the receiving end correctly receives the SCI, and activates the timer. In this state, if the transmitting end cannot transmit the sidestream data within the validity period of the timer, resource waste is caused, or data transmission delay is increased. In this state, the transmitting end can continue to transmit the sidestream data multiple times within the expiration period of the timer. If N DTX's are continuously detected, it can be considered that the receiving end does not activate the timer at this time, thereby stopping the continuous transmission of data.

Alternatively, the parameter N may be determined in accordance with any one or more of the following:

mode 1. Determining according to pre-configuration or network configuration information. For example, the resource pool configuration information includes indication information from which the parameter N can be determined.

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

Mode 3. Determining according to the first parameter.

For example, the first parameter is at least one of priority, reliability, latency, CBR, logical Channel Identification (LCID).

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

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

The timer may be configured by the sender to the receiver, i.e. the sender sends configuration information to the receiver, which configuration information is used to configure the first timer.

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

In this example, the transmitting end may determine whether the receiving end correctly receives the SCI and starts the timer according to detecting whether the PSFCH has DTX, so as to determine whether the transmitting end may transmit the side line data to the receiving end during the validity period of the timer. Therefore, the signaling overhead caused by the receiving end sending the indication information of the timer can be avoided.

Example 2: the sending end obtains first indication information from the receiving end. The sending end determines that the receiving end activates the first timer according to the first indication information.

The side-row transmission has the following cases: the transmitting end transmits sidestream data, but does not activate sidestream feedback; alternatively, the resource pool is not configured with sidestream feedback resources (no feedback resources, i.e., sidestream feedback is not supported in the resource pool). In at least one of the above cases, when the receiving end receives sidestream data sent by the sending end, and starts, activates or resets a timer drx-InactivityTimer, the receiving end sends first indication information to the sending end. The first indication information is used for indicating that the receiving end has activated the timer. The transmitting end can determine that the receiving end has activated the timer according to the first indication information sent by the receiving end. Thus, the sender may send side line data to the receiver before the timer expires.

Optionally, the first indication information is used for indicating the receiving end to start, activate or restart the first timer and/or indicating the duration and/or range of the first timer. For example, the first indication information indicates that the receiving end activates a first timer; or the first indication information indicates the duration of the first timer, which implicitly indicates that the receiving end starts, activates or restarts the first timer.

Optionally, the duration and/or range of the first timer starts from the time slot in which the sidestream channel carrying the first indication information is located. For example, the transmitting end receives the PSSCH transmitted by the receiving end in the time slot n, and carries the first indication information in the PSSCH, which indicates that the duration of the first timer is 20 time slots, and the effective range of the first timer is 20 time slots starting from the time slot n, namely [ n, n+19]; alternatively, the effective range of the first timer is 20 slots starting from slot n+1, i.e., [ n+1, n+20].

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

Optionally, in mode 2, the receiving end autonomously selects a transmission resource from the resource pool, and the receiving end may use the transmission resource to send the first indication information, 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 is a transmission resource available, if there is a transmission resource authorized by configuration, the receiving end may use the transmission resource to send the first indication information, otherwise, the terminal sends a resource request to the network, requesting the network to allocate the transmission resource.

In this example, the receiving end sends indication information of the timer to the sending end, which indicates whether the receiving end activates or starts the timer, and/or parameter information of the timer, so that the sending end can send side line data to the receiving end within the valid time range of the timer.

Example 3: the receiving end determines whether the first indication information needs to be sent to the sending end

In example 1, the transmitting end may determine whether the receiving end correctly receives the SCI by activating the sidestream feedback and detecting whether there is DTX, and further determine whether the receiving end activates the first timer. At this time, the receiving end does not need to send the indication information alone, which can reduce the signaling overhead, improve the resource utilization rate and reduce the system congestion. However, if the sidestream feedback transmission resource is not configured in the resource pool, or the sender does not activate sidestream feedback, the manner 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 state of the timer of the receiving end.

The receiving end may determine whether it is necessary to transmit indication information for determining whether the timer is started, activated or reset to the transmitting end in the following manner.

Example 3-1: preconfiguration information or network configuration information

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

For example, the resource pool configuration information includes indication information, that is, fifth indication information, which is used to indicate that the receiving end needs to send the first indication information when starting, activating or resetting the timer. The receiving end receives the sidestream data sent by the sending end in the resource pool, starts a timer, and needs to send first indication information to the sending end at the moment. If the fifth indication information is not included in the resource pool configuration information, or the fifth indication information in the resource pool configuration information indicates that the receiving end does not need to send the first indication information when starting, activating or resetting the timer, the receiving end does not need to send the first indication information to the sending end when starting the timer.

Example 3-2: indication information of transmitting end, namely second indication information

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

Examples 3-3: whether the resource pool is configured with sidestream feedback resources

When PSFCH feedback resources are not configured in the resource pool configuration information, the sending end cannot enable the receiving end to send PSFCH in a mode of activating side line feedback. Therefore, the receiving end needs to send the first indication information when starting, activating or resetting the timer. For example, parameters are included in the resource pool configuration information: SL-ResourceBoool. The information element (ID) of this parameter is used to describe The configuration information of The NR side chain communication resource pool (The IE SL-ResourcePool specifies The configuration information for NR sidelink communication resource pool.).

The following is an example of an IE for SL-resource pool.

Examples of PSFCH configuration fields for the side links are illustrated in the following table.

For example, when the value of the parameter sl-PSFCH-Period is 0, it indicates that the current resource pool does not support sidestream feedback. In this case, the receiving end needs to transmit the first indication information when starting, activating or resetting the timer.

For another example, when all bits of the parameter sl-PSFCH-RB-Set have values of 0, that is, the frequency domain resource of the PSFCH is not allocated, the resource pool may be considered as not supporting side feedback. In this case, the receiving end needs to transmit the first indication information when starting, activating or resetting the timer.

Examples 3-4: whether the sender activates sidestream feedback

If the resource pool is configured with side line feedback resources, when the transmitting end transmits side line data, the side line feedback can be activated and deactivated. If the sender activates the deactivation side feedback, the receiver will not send PSFCH to the sender. In this case, if the receiving end starts, activates or resets the timer, it is necessary to transmit the first indication information.

In this example, the receiving end may determine whether the timer indication information needs to be transmitted to the transmitting end according to the pre-configuration information, the network configuration information, the transmitting end indication information, the resource pool configuration information, and the like.

In the embodiment of the application, the sending end sends the side line data to activate the side line feedback, and whether the receiving end activates the timer can be judged according to the detection PSFCH, so that the receiving end can be prevented from sending additional indication information to indicate the state of the timer, and signaling overhead is reduced. In addition, under the condition that the current resource pool does not support sidestream feedback, the sending end obtains the indication information sent by the receiving end and obtains the timer state of the receiving end, so that whether sidestream data can be sent within the valid period of the timer can be determined.

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:

and a transmitting unit 410, configured to transmit the first physical sidelink control channel PSSCH within a time range in which the first timer is activated, when receiving the first information from the second terminal. The first timer is a timer determined according to the sidestream Discontinuous Reception (DRX) configuration information.

In this embodiment, the first terminal may be a terminal that transmits sidestream data, such as PSSCH, in sidestream communication. The second terminal may be a terminal that receives sidestream data in sidestream communication.

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

Optionally, the first information includes first indication information; the transmitting unit 410 is further configured to transmit a first PSSCH to a second terminal within a time range in which the first timer is activated, in case that the first indication information is received from the second terminal.

Optionally, the first indication information is carried in at least one of SCI, MAC CE, 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;

a range of the first timer;

the second terminal is in an activated state;

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

Optionally, as shown in fig. 16, the first terminal further includes: a first determining unit 420, configured to determine a start, activate or reset time of the first timer according to a 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 information needs to be sent in a case of starting, activating or resetting the first timer; or, the second indication information is used for indicating the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an activated state; or, whether the second terminal is within the activation time range of the first timer.

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

Optionally, the first information includes sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.

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

Optionally, the transmitting unit is further configured to transmit the second PSSCH within a time range in which the second terminal is activated.

a time range of the first timer;

time range of the second timer.

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

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

Optionally, the first terminal further includes: and a third judging unit 450, configured to judge whether the sidestream feedback information from the second terminal is received.

Optionally, the first terminal further includes: a second determining unit 460, configured to determine a discontinuous transmission DTX state if the sidestream feedback information is not received.

Optionally, the first terminal further includes: and a stopping unit 470 for stopping transmitting sidestream data within the effective range of the first timer in the case of determining continuous N DTX states.

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

determined according to a pre-configuration;

determining according to the network configuration information;

determining according to third indication information of the second terminal;

determined from the first parameter.

Optionally, the first parameter includes at least one of:

priority, reliability, latency, channel busy rate CBR and logical channel identification LCID.

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

Optionally, the first terminal further comprises at least one of:

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

a receiving unit 491, configured to receive, by the first terminal, fourth indication information from the second terminal, the fourth indication information indicating a duration and/or a range of the first timer.

The first terminal 400 in the embodiment of the present application can implement the corresponding function of the first terminal in the foregoing method embodiment. The flow, function, implementation and beneficial effects corresponding to each module (sub-module, unit or assembly, etc.) in the first terminal 400 can be referred to the corresponding description in the above method embodiments, and will not be repeated here. It should be noted that, the functions described in the respective modules (sub-modules, units, or components, etc.) in the first terminal 400 in the application embodiment may be implemented by different modules (sub-modules, units, or components, etc.), or may be implemented by the same module (sub-module, unit, component, etc.).

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 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 a first physical sideline control channel PSSCH within a time range in which the first timer is activated, where the first timer is a timer determined according to sideline discontinuous reception DRX configuration information.

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

the duration of the first timer;

a range of the first timer;

the second terminal is in an activated state;

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

Optionally, as shown in fig. 18, the second terminal further includes: a first receiving unit 520 for receiving second indication information from the first terminal, the second indication information being used for indicating whether the first indication information needs to be transmitted in the case of starting, activating or resetting the first timer; or, the second indication information is used for indicating the second terminal to send the first indication information. The first indication information indicates whether the second terminal is in an activated state; or, whether the second terminal is within 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, where the fifth indication information is used to indicate whether to send the first indication information when the first timer is started, activated or reset.

Optionally, the second terminal further includes: the second determining unit 540 is configured to determine, when the side feedback resource is not configured in the resource pool configuration information, that the first indication information needs to be sent when the first timer is started, activated or reset.

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

Optionally, the second terminal further includes: a second receiving unit 560 for receiving the second PSSCH from the first terminal and an SCI associated with the second PSSCH, the SCI indicating activation side feedback.

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

a time range of the first timer;

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, where the N is used for the first terminal to stop sending sidestream data in an effective range of the first timer when detecting sidestream feedback information sent by the second terminal and determining a continuous N DTX status.

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 a duration and/or a range of the first timer.

The second terminal 500 in the embodiment of the present application can implement the corresponding function of the second terminal in the foregoing method embodiment. The flow, function, implementation and beneficial effects corresponding to each module (sub-module, unit or assembly, etc.) in the second terminal 500 can be referred to the corresponding description in the above method embodiments, and will not be repeated here. It should be noted that, the functions described in the respective modules (sub-modules, units, or components, etc.) in the second terminal 500 of the application embodiment may be implemented by different modules (sub-modules, units, or components, etc.), or may be implemented by the same module (sub-module, unit, component, etc.).

Fig. 19 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 comprises a processor 610, which processor 610 may call and run a computer program from a memory to cause the communication device 600 to implement the methods in embodiments of the present application.

Optionally, the communication device 600 may further comprise a memory 620. Wherein the processor 610 may invoke and run a computer program from the memory 620 to cause the communication device 600 to implement the method in the embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into 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, and in particular, may send information or data to other devices, or receive information or data sent by other devices. The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be a second terminal in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the second terminal in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be a first terminal in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the first terminal in each method in the embodiment of the present application, which is not described herein for brevity.

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 may call and run a computer program from a memory to implement the methods of the embodiments of the present application.

Optionally, chip 700 may also include memory 720. The processor 710 may invoke and execute a computer program from the memory 720 to implement the method performed by the first terminal or the second terminal in the embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

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

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

Optionally, the chip may be applied to the second terminal in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the second terminal in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to the first terminal in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the first terminal in each method in the embodiment of the present application, which is not described herein 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 chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The processors mentioned above may be general purpose processors, digital signal processors (digital signal processor, DSP), off-the-shelf programmable gate arrays (field programmable gate array, FPGA), application specific integrated circuits (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.

The memory mentioned above may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM).

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being 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 send a first physical sidelink control channel PSSCH within a time frame activated by a first timer when receiving first information from the second terminal, where the first timer is determined according to sidelink discontinuous reception 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 a first timer, or the first information is used to instruct the first terminal to send a first physical sideline control channel PSSCH within a time range in which the first timer is activated, where the first timer is a timer determined according to sideline discontinuous reception DRX configuration information. Wherein the first terminal 810 may be used to implement the corresponding functions implemented by the first terminal in the above-described method, and the second terminal 820 may be used to implement the corresponding functions implemented by the second terminal in the above-described method. For brevity, the description is omitted here.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), or the like.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A sidestream transmission method, comprising:

and the first terminal sends a first physical sidelink control channel PSSCH in a time range activated by a first timer under the condition of receiving first information from the second terminal, wherein the first timer is determined according to the sidelink Discontinuous Reception (DRX) configuration information.
The method of claim 1, wherein the first timer is a sidestream DRX deactivation timer.
The method of claim 1 or 2, wherein the first information comprises first indication information;

the first terminal transmitting a first PSSCH in a time range in which a first timer is activated in case of receiving first information from a second terminal, comprising:

and the first terminal sends a first PSSCH to a second terminal within the time range of the activation of the first timer under the condition that the first indication information from the second terminal is received.
The method of claim 3, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of claim 3 or 4, wherein the first indication information is used to indicate at least one of:

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;

a range of the first timer;

the second terminal is in an activated state;

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

and the first terminal determines the starting, activating or resetting time of the first timer according to the time of receiving the first indication information.
The method of any of claims 3 to 6, wherein the method further comprises:

the first terminal sends second indication information to the second terminal, wherein the second indication information is used for indicating whether the first indication information needs to be sent under the condition of starting, activating or resetting a first timer.
The method of claim 7, wherein the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of claim 1 or 2, wherein the first information comprises sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.
The method of claim 9, wherein the method further comprises:

the first terminal sends the second PSSCH and an SCI associated with the second PSSCH to the second terminal, the SCI indicating activation side feedback.
The method of claim 10, wherein the first terminal transmitting the second PSSCH to the second terminal comprises:

the first terminal transmits the second PSSCH in a time range in which the second terminal is activated.
The method of claim 11, wherein the time range for activation of the second terminal is determined according to at least one of:

a time range of the first timer;

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 the first information from the second terminal is received.
The method of claim 13, wherein the method further comprises:

and the first terminal judges whether the first information is in the effective range of the first timer or the effective range of the second timer under the condition that the first information is received.
The method of claim 14, wherein the method further comprises:

the first terminal transmits the first PSSCH to the second terminal in case of being within the effective range of the first timer or the effective range of the second timer.
The method of claim 12, 14 or 15, wherein the second timer is a sidelink discontinuous reception activation period timer drx-onduration timer.
The method of any of claims 9 to 12, wherein the method further comprises:

and the first terminal judges whether the sidestream feedback information from the second terminal is received or not.
The method of claim 17, wherein the method further comprises:

and under the condition that the sidestream feedback information is not received, the first terminal determines a discontinuous transmission DTX state.
The method of claim 18, wherein the method further comprises:

and the first terminal stops sending the sidestream data in the effective range of the first timer under the condition that the continuous N times of DTX states are determined.
The method of claim 19, wherein the determination of N comprises at least one of:

determined according to a pre-configuration;

determining according to the network configuration information;

determining according to third indication information of the second terminal;

determined from the first parameter.
The method of 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:

priority, reliability, latency, 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 obtains the duration and/or the range corresponding to the first timer.
The method of any one of claims 1 to 23, wherein the method further comprises at least one of:

the first terminal sends 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, wherein the fourth indication information is used for indicating the duration and/or the range of the first timer.
A sidestream transmission method, comprising:

the second terminal sends first information to the first terminal, wherein the first information is used for indicating that the second terminal activates, starts or restarts a first timer, or the first information is used for indicating that the first terminal sends a first physical sideline control channel PSSCH in a time range of activation of the first timer, and the first timer is a timer determined according to the sideline discontinuous reception DRX configuration information.
The method of claim 25, wherein the first timer is a sidestream DRX deactivation timer.
The method of claim 25 or 26, wherein the first information comprises first indication information, the first indication information is used to indicate that the second terminal activates, starts or restarts a first timer, or the first indication information is used to indicate that the first terminal transmits a first PSSCH to the second terminal within a time range of the first timer activation.
The method of claim 27, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The method of claim 27 or 28, wherein the first indication information is further used to indicate at least one of:

the duration of the first timer;

a range of the first timer;

the second terminal is in an activated state;

the second terminal is within an 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, wherein the second indication information is used for indicating whether the first indication information needs to be sent or not under the condition of starting, activating or resetting the first timer.
The method of 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, wherein the fifth indication information is used for indicating whether to send the first indication information under the condition of starting, activating or resetting the first timer.
The method of claim 32, wherein the fifth indication information is pre-configuration information or network configuration information.
The method of 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:

and the second terminal determines that the first indication information needs to be sent under the condition of starting, activating or resetting the first timer under the condition that the sidestream feedback resources are not configured in the resource pool configuration information.
The method of any one of claims 27 to 35, wherein the method further comprises:

And the second terminal determines that the first indication information needs to be sent under the condition of starting, activating or resetting the first timer under the condition that the first terminal deactivates sidestream feedback.
The method of claim 24 or 25, wherein the first information comprises sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.
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 side feedback.
The method of claim 38, wherein the second terminal receiving the second PSSCH from a first terminal comprises: the second terminal receives the second PSSCH transmitted by the first terminal in the time range of the second terminal activation.
The method of claim 39, wherein the time range for activation of the second terminal is determined based on at least one of:

a time range of the first timer;

time range of the second timer.
The method of claim 40, wherein the second timer is a sidelink discontinuous reception (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, wherein the third indication information comprises a parameter N, and the N is used for stopping sending sidestream data within the effective range of the first timer when the first terminal detects sidestream feedback information sent by the second terminal and determines continuous N DTX states.
The method of 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, wherein the fourth indication information is used for indicating the duration and/or the range of the first timer.
A first terminal, comprising:

and a transmitting unit, configured to transmit a first PSSCH within a time range in which a first timer is activated, where the first timer is a timer determined according to the sidestream DRX configuration information, when first information from the second terminal is received.
The first terminal of claim 45, wherein the first timer is a sidestream DRX deactivation timer.
The first terminal of claim 45 or 46, wherein the first information includes first indication information;

the transmitting unit is further configured to transmit a first PSSCH to a second terminal within a time range in which the first timer is activated, in case that the first indication information from the second terminal is received.
The first terminal of claim 47, wherein the first indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The first terminal of claim 47 or 48, wherein the first indication information is used to indicate at least one of:

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;

a range of the first timer;

the second terminal is in an activated state;

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

And the first determining unit is used for determining the starting, activating or resetting time of the first timer according to the time of receiving the first indication information.
The first terminal according to any of claims 47-50, wherein the transmitting unit is further configured to transmit second indication information to the second terminal, the second indication information being configured to indicate whether the first indication information needs to be transmitted in case of starting, activating or resetting a first timer.
The first terminal of claim 51, wherein the second indication information is carried in at least one of SCI, MAC CE, PC5-RRC signaling.
The first terminal of claim 45 or 46, wherein the first information comprises sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.
The first terminal of claim 53, wherein the transmitting means is further for transmitting the second PSSCH and an SCI associated with the second PSSCH to the second terminal, the SCI indicating activation side row feedback.
The first terminal of claim 54, wherein the transmitting unit is further configured to transmit the second PSSCH within a time frame of activation of the second terminal.
The first terminal of claim 55, wherein the time range for activation of the second terminal is determined from at least one of:

a time range of the first timer;

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

and the first judging unit is used for judging whether the first information from the second terminal is received or not.
The first terminal of claim 57, wherein the first terminal further comprises:

and the second judging unit is used for judging whether the first information is in the effective range of the first timer or the effective range of the second timer under the condition that the first information is received.
The first terminal of claim 58, wherein the transmitting unit is further configured to transmit the first PSSCH to the second terminal if the first PSSCH is within a valid range of the first timer or within a valid range of the second timer.
The first terminal of claim 56, 58 or 59, wherein said second timer is a sidelink discontinuous reception activation period timer drx-onduration timer.
The first terminal of any of claims 53 to 56, wherein the first terminal further comprises:

and the third judging unit is used for judging whether the sidestream feedback information from the second terminal is received or not.
The first terminal of claim 61, wherein the first terminal further comprises:

and the second determining unit is used for determining a discontinuous transmission DTX state by the first terminal under the condition that the sidestream feedback information is not received.
The first terminal of claim 62, wherein the first terminal further comprises:

and a stopping unit for stopping transmitting-side data within the effective range of the first timer when determining continuous N DTX states.
The first terminal of claim 63, wherein the manner of determining N includes at least one of:

determined according to a pre-configuration;

determining according to the network configuration information;

determining according to third indication information of the second terminal;

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

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

the acquisition unit is used for acquiring the duration and/or the range corresponding to the first timer.
The first terminal of any of claims 45 to 67, wherein the first terminal further comprises at least one of:

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

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

and the sending unit is used for sending first information to the first terminal, wherein the first information is used for indicating the second terminal to activate, start or restart a first timer, or the first information is used for indicating the first terminal to send a first PSSCH within the time range of the activation of the first timer, and the first timer is a timer determined according to the sidestream DRX configuration information.
The second terminal of claim 69, wherein the first timer is a sidestream DRX deactivation timer.
The second terminal of claim 69 or 70, wherein the first information includes first indication information for indicating that the second terminal activates, starts or restarts a first timer, or the first indication information is for indicating that the first terminal transmits a first PSSCH to the second terminal within a time range of the first timer activation.
The second terminal of 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 duration of the first timer;

a range of the first timer;

the second terminal is in an activated state;

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

the first receiving unit is configured to receive second indication information from the first 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 second terminal of 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 of claims 71 to 75, wherein the second terminal further comprises:

a first determining unit, configured to determine 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 indication information when the first timer is started, activated or reset.
The second terminal of claim 76, wherein the fifth indication information is pre-configuration information or network configuration information.
The second terminal of claim 76 or 77, wherein the fifth indication information is in resource pool configuration information.
The second terminal according to any of claims 71 to 78, wherein the second terminal further comprises:

and the second determining unit is used for determining that the first indication information needs to be sent when the first timer is started, activated or reset under the condition that the side feedback resource is not configured in the resource pool configuration information.
The second terminal of any of claims 71 to 79, wherein the second terminal further comprises:

And the third determining unit is used for determining that the first indication information needs to be sent when the first timer is started, activated or reset under the condition that the first terminal deactivates sidestream feedback.
The second terminal of claim 68 or 69, wherein the first information includes sidestream feedback information; the sidestream feedback information is sidestream feedback information of a second PSSCH sent by the second terminal aiming at the first terminal.
The second terminal of claim 81, wherein the second terminal further comprises:

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

a time range of the first timer;

time range of the second timer.
The second terminal of claim 84, wherein the second timer is a sidelink discontinuous reception activation period timer drx-onduration timer.
The second terminal according to any of claims 81 to 85, wherein the transmitting unit is further configured to transmit third indication information to the first terminal, the third indication information including a parameter N, where N is used for the first terminal to stop transmitting sidestream data within an effective range of the first timer if detecting sidestream feedback information transmitted by the second terminal and determining a continuous N DTX status.
The second terminal of 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 of claims 69 to 87, wherein the sending unit is further configured to send fourth indication information to the first terminal, the fourth indication information being configured to indicate a duration and/or a range of the first timer.
A first terminal, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to cause the first terminal to perform the method of any of claims 1 to 24.
A second terminal, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to cause the second terminal to perform the method of any of claims 25 to 44.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 24.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 25 to 44.
A computer readable storage medium 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 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 for causing a computer to perform the method of any one of claims 1 to 24.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 25 to 44.
A computer program which causes a computer to perform the method of any one of claims 1 to 24.
A computer program which causes a computer to perform the method of any one of claims 25 to 44.