CN116569644A

CN116569644A - Wireless communication method and terminal equipment

Info

Publication number: CN116569644A
Application number: CN202180077341.7A
Authority: CN
Inventors: 冷冰雪; 卢前溪; 张博源
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2023-08-08
Also published as: WO2022205095A1

Abstract

The embodiment of the application provides a wireless communication method and terminal equipment, which realize DRX synchronization of both receiving and transmitting terminals when a synchronous source of a transmitting terminal changes under the condition that a plurality of synchronous sources exist in side communication, and ensure that a receiving terminal can receive information transmitted by the transmitting terminal. The wireless communication method is suitable for sidestream transmission between a first terminal and a second terminal, and comprises the following steps: and the first terminal receives information on all the receiving resource pools configured for the first terminal according to the DRX configuration, or receives information on the receiving resource pool for receiving the information or the receiving resource pool with the same type of synchronous source as the receiving resource pool for receiving the information.

Description

Wireless communication method and terminal equipment

Technical Field

The embodiment of the application relates to the field of communication, and more particularly, to a wireless communication method and terminal equipment.

Background

In sidelink (sidelink), there may be multiple synchronization sources, with different synchronization sources resulting in the edges of a frame or sub-frame that may not be aligned. When the synchronization scenario or configuration of the transmitting terminal changes and the synchronization source needs to be changed, how to perform discontinuous reception (Discontinuous Reception, DRX) synchronization between the transmitting terminal and the receiving terminal is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and terminal equipment, which realize DRX synchronization of both receiving and transmitting terminals when a synchronous source of a transmitting terminal changes under the condition that a plurality of synchronous sources exist in side communication, and ensure that a receiving terminal can receive information transmitted by the transmitting terminal.

In a first aspect, a method of wireless communication is provided, adapted for sidestream transmission between a first terminal and a second terminal, the method comprising:

and the first terminal receives information on all the receiving resource pools configured for the first terminal according to the DRX configuration, or receives information on the receiving resource pool for receiving the information or the receiving resource pool with the same type of synchronous source as the receiving resource pool for receiving the information.

In a second aspect, a method of wireless communication is provided, adapted for sidestream transmission between a first terminal and a second terminal, the method comprising:

the first and second terminals maintain the DRX-related timer during a change of the synchronization source of the second terminal from the first synchronization source to the second synchronization source, or the first and second terminals suspend or stop the DRX-related timer.

In a third aspect, a terminal device is provided for performing the method in the first aspect.

Specifically, the terminal device comprises functional modules for performing the method in the first aspect described above.

In a fourth aspect, a terminal device is provided for performing the method in the second aspect.

Specifically, the terminal device comprises a functional module for performing the method in the second aspect described above.

In a fifth aspect, a terminal device is provided comprising 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 to execute the method in the first aspect.

In a sixth aspect, a terminal device is provided, comprising a processor and a memory. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for performing the method of the second aspect described above.

In a seventh aspect, there is provided an apparatus for implementing the method of any one of the first to second aspects.

Specifically, the device comprises: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method of any of the first to second aspects as described above.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method of any one of the first to second aspects.

In a ninth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects above.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any of the first to second aspects described above.

By the technical solution of the first aspect, the first terminal performs information reception on all the reception resource pools configured for the first terminal according to the DRX configuration, or performs information reception on the reception resource pool that receives the information or the reception resource pool that has the same type of synchronization source as the reception resource pool that receives the information. That is, for the receiving terminal, information is received on all the receiving resource pools according to the DRX configuration, or information is received on the receiving resource pool of the receiving information or the receiving resource pool of the synchronizing source having the same type as the receiving resource pool of the receiving information, so that when the synchronizing source of the transmitting terminal changes, the receiving terminal can be ensured to receive the information transmitted by the transmitting terminal, and DRX synchronization of both transmitting and receiving terminals can also be realized.

Through the technical scheme of the second aspect, in the process that the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source, the first terminal and the second terminal keep a DRX related timer; alternatively, the first terminal and the second terminal suspend or stop the DRX-related timer. That is, for the transmitting and receiving terminals, the DRX related timer is maintained during the process of changing the synchronization source of the transmitting terminal, or the DRX related timer is paused or stopped, so that DRX synchronization of both transmitting and receiving terminals is realized when the synchronization source of the transmitting terminal changes, and the receiving terminal is ensured to receive the information transmitted by the transmitting terminal.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture to which embodiments of the present application apply.

Fig. 2 is a schematic diagram of another communication system architecture to which embodiments of the present application apply.

Fig. 3 is a schematic diagram of a different synchronization source provided herein resulting in frame/sub-frame edge misalignment.

Fig. 4 is a schematic flow chart of a method of wireless communication provided in accordance with an embodiment of the present application.

Fig. 5 is a schematic flow chart diagram of another method of wireless communication provided in accordance with an embodiment of the present application.

Figure 6 is a schematic flow chart diagram of DRX synchronization during synchronization source change according to one embodiment of the present application.

Fig. 7 is a schematic flow chart of DRX synchronization during synchronization source change according to another embodiment of the present application.

Fig. 8 is a schematic flow chart of DRX synchronization during synchronization source change according to yet another embodiment of the present application.

Fig. 9 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope 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, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio, NR system evolution system, LTE over unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR over unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile telecommunication 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 mounted 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 a 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, a network device or a base station (gNB) in an NR network, a network device in a PLMN network of 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.

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.

The terminology used in the description section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

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 the embodiment of the present application, the "predefining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the specific implementation of the present application is not limited. Such as predefined may refer to what is defined in the protocol.

In this embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

The device-to-device communication is based on a side-link (SL) technology of D2D, and unlike a conventional cellular system in which communication data is received or transmitted through a base station, the internet of vehicles system adopts a terminal-to-terminal direct communication mode, so that the system has higher spectral efficiency and lower transmission delay.

Fig. 1 is a schematic diagram of a communication system to which embodiments of the present application are applicable. The transmission resources of the in-vehicle terminals (in-vehicle terminal 121 and in-vehicle terminal 122) are allocated by the base station 110, and the in-vehicle terminals transmit data on the side links according to the resources allocated by the base station 110. Specifically, the base station 110 may allocate resources for single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal.

Fig. 2 is a schematic diagram of another communication system to which embodiments of the present application are applicable. The vehicle-mounted terminals (the vehicle-mounted terminal 131 and the vehicle-mounted terminal 132) autonomously select transmission resources on the resources of the side links to perform data transmission. Optionally, the vehicle-mounted terminal may select the transmission resource randomly, or select the transmission resource by listening.

To facilitate a better understanding of embodiments of the present application, terms related to the present application are described.

Proximity-based Services (ProSe): device-to-device communication in release12 (release 12, rel-12) or release13 (release 13, rel-13) was studied for the ProSe scenario, which is mainly directed to public safety class traffic.

In ProSe, by configuring the position of the resource pool in the time domain, for example, the resource pool is discontinuous in the time domain, discontinuous data transmission/reception of the UE on the side link is achieved, so that the effect of power saving is achieved.

Internet of vehicles (V2X): in release14 (release 14, rel-14) or release15 (release 15, rel-15), the internet of vehicles system is studied for the scene of vehicle-to-vehicle communication, which is mainly directed to the traffic of vehicle-to-vehicle and vehicle-person communication that moves at a relatively high speed. In V2X, since the in-vehicle system has continuous power supply, power efficiency is not a major problem, and delay of data transmission is a major problem, so that continuous transmission and reception by the terminal device is required in system design.

Wearable device (FeD 2D): in Rel-14, this scenario is studied for a scenario where a wearable device accesses a network through a handset, which is mainly oriented to a scenario of low movement speed and low power access. In FeD2D, the 3GPP concludes that the base station can configure the DRX parameters of the remote terminal through a relay terminal in the pre-research stage.

For a better understanding of the examples herein, the NR V2X related to the present application will be described.

NR V2X is not limited to broadcast scenes on the basis of LTE V2X, but extends further to unicast and multicast scenes where V2X applications are studied.

Similar to LTE V2X, NR V2X also defines two resource grant modes, mode 1 (corresponding to the communication system shown in fig. 1 above) and mode 2 (corresponding to the communication system shown in fig. 2 above); further, the user may be in a mixed mode, i.e., both mode 1 and mode 2 may be used for resource acquisition. The resource acquisition is indicated by means of a sidelink grant, i.e. the sidelink grant indicates the time-frequency position of the corresponding physical sidelink control channel (Physical Sidelink Control Channel, PSCCH) and physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) resources.

Unlike LTE V2X, NR V2X introduces feedback-based HARQ retransmissions, not limited to unicast communications, but also multicast communications, in addition to feedback-free, UE-initiated hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) retransmissions.

As in LTE V2X, in NR V2X, since the in-vehicle system has continuous power supply, power efficiency is not a major problem, and delay of data transmission is a major problem, and thus continuous transmission and reception by the terminal device is required in system design.

In order to better understand the embodiments of the present application, a selection manner of a resource pool based on different synchronization sources related to the present application is described.

The resource pool configuration information includes the synchronization source type allowed by the resource pool, namely, only the terminal selecting the synchronization source type can use the resource pool to transmit data. Before the terminal performs side transmission, firstly selecting a synchronous source, and performing data transmission by using a transmission resource pool allowing the synchronous source type according to the synchronous source type. If there are multiple transmission resource pools of the synchronization source type allowed, there is no specific standardized selection criterion, but one of them is selected based on the terminal implementation.

To facilitate a better understanding of embodiments of the present application, DRX relevant to the present application is described.

The UE can configure discontinuous monitoring physical downlink control channels (Physical Downlink Control Channel, PDCCH) according to DRX to achieve the purpose of saving power, when the PDCCH carries cell radio network temporary identifiers (Cell Radio Network Temporary Identity, C-RNTI) corresponding to the UE, cancel indication RNTI (Cancellation indication RNTI, CI-RNTI), configure scheduling RNTI (Configured Scheduling RNTI, CS-RNTI), interrupt transmission indication RNTI (Interrupted transmission indication RNTI, INT-RNTI), time slot format indication RNTI (Slot Format Indication RNTI, SFI-RNTI), semi-persistent channel state information radio network temporary identifiers (Semi-Persistent Channel State Information Radio Network Temporary Identity, SP-CSI-RNTI), transmission power control physical uplink control channel RNTI (Transmit Power Control Physical Uplink Control Channel RNTI, TPC-PUCCH-RNTI), transmission power control physical uplink shared channel RNTI (Transmit Power Control Physical Uplink Shared Channel RNTI, TPC-PUSCH-RNTI), transmission power control sounding reference signal RNTI (Transmit Power Control Sounding Reference Signal, TPC-SRS-RNTI) and artificial intelligent RNTI (Artificial Intelligence, AI-). The network controls the DRX behavior of the UE by configuring a series of parameters including:

A DRX duration timer (DRX-onduration timer), a DRX slot offset (DRX-Slotoffset), a DRX inactivity timer (DRX-InactyTimer), a downlink DRX retransmission timer (DRX-retransmission TimerDL), an uplink DRX retransmission timer (DRX-retransmission TimerUL), a DRX long cycle start offset (DRX-longCyclostartOffset), a DRX short cycle (DRX-Shortcycle) parameter (optionally): a short DRX cycle (the Short DRX cycle), a DRX short cycle timer (optionally) a downlink HARQ round trip transmission time timer (Downlink HARQ Round Trip Time Timer, HARQ-RTT-TimerDL), an uplink DRX HARQ RTT timer (Uplink DRX HARQ RTT, DRX-HARQ-RTT-timerl), a power save Wakeup (Power Saving Wakeup, ps-Wakeup) (optionally), power save transmission of other periodic channel state information (Power Saving Transmit Other Periodic Channel State Information, ps-fransmit other periodic csi) (optionally), power save transmission of periodic layer 1 reference signal received power (Power Saving Transmit Periodic L1 Reference Signal Received Power, ps-fransmit periodic l 1-RSRP) (optionally).

Wherein the UE will be in DRX active state as follows:

the drx-ondurationTimer or drx-InactivityTimer run period;

drx-retransmission timer DL or drx-retransmission timer UL run time;

a random access contention resolution timer (ra-contentionresolution timer) or a message B response window (msgB-response window) is running;

there are outstanding scheduling requests (Scheduling Request, SR);

the PDCCH indicates that there is a new transmission period.

To facilitate a better understanding of embodiments of the present application, the side-uplink synchronization techniques associated with the present application are described.

The synchronization source types in NR-V2X systems include: eNB, gNB, global navigation satellite system (Global Navigation Satellite System, GNSS), UE, terminal internal clock. The levels of synchronization sources defined in the NR-V2X system are shown in Table 1 below, where a smaller priority identification represents a higher priority, e.g., for GNSS configured as the highest priority, the priority size may be: p0 > P1 > P2 > P3 > P4 > P5 > P6 > P7. For example, for a gNB/eNB configured as the highest priority, the priority size may be: p0 '> P1' > P2 '> P3' > P4 '> P5' > P6 '> P7'.

TABLE 1 NR-V2X System synchronization priority

The laterally transmitted terminals may be located within or outside the cell coverage and, when within the cell coverage, the network may be configured with a higher priority by the gNB/eNB or GNSS. The UE may determine the synchronization source according to different scenarios and different configuration situations.

In the Uu interface (i.e., uplink and downlink transmission) based DRX mechanism, all UEs and the network remain downlink synchronized, so Uu's DRX need only be designed for a unique synchronization source based on the network. In a DRX mechanism based on a PC5 interface (i.e., sidelink transmission), there are multiple synchronization sources, including GNSS-based synchronization, gNB/eNB-based synchronization, and UE-based synchronization, as shown in fig. 3, the frame/subframe edges caused by different synchronization sources may not be aligned.

In a sidelink system, when a synchronization scene or configuration of a transmitting UE changes and a synchronization source needs to be changed, after the synchronization source of the transmitting UE changes, the transmitting UE transmits in a transmission resource pool (Tx pool) supporting the new synchronization source according to the new synchronization source, and a receiving UE does not know the change and continues to perform DRX receiving operation according to the original synchronization source, so that a DRX mechanism between the transmitting UE and the receiving UE is not synchronized, and further data transmission failure is caused.

Based on the above problems, the present application proposes a scheme for DRX synchronization. When the synchronization source of the transmitting terminal changes under the condition that a plurality of synchronization sources exist in the sidestream communication, the receiving terminal can be ensured to receive the information transmitted by the transmitting terminal. Furthermore, DRX synchronization of both transmitting and receiving terminals may be achieved.

The technical scheme of the present application is described in detail below through specific embodiments.

Fig. 4 is a schematic flow chart of a method 200 of wireless communication according to an embodiment of the present application, applicable to sidestream transmission between a first terminal and a second terminal, as shown in fig. 4, the method 200 of wireless communication may be performed by the first terminal, and the method 200 of wireless communication may include at least some of the following:

s210, the first terminal receives information on all the receiving resource pools configured for the first terminal according to the DRX configuration, or receives information on the receiving resource pool that receives information or the receiving resource pool that has the same type of synchronization source as the receiving resource pool that receives information.

In the embodiment of the application, the first terminal receives information on all configured receiving resource pools, or the first terminal receives information on a receiving resource pool of a synchronous source with the same type as the receiving resource pool of the information, so that DRX synchronization of both receiving and transmitting terminals is realized under the condition that the second terminal generates synchronous source conversion, and the first terminal can receive information sent by the second terminal.

In an embodiment of the present application, the DRX configuration is for a side uplink between the first terminal and the second terminal. For example, the first terminal may perform information reception on a reception resource pool according to the DRX configuration, and the second terminal may perform information transmission on a transmission resource pool according to the DRX configuration.

In the embodiment of the present application, the information sent and received may be data, or may be a signal or other message type, which is not limited in this application.

In some embodiments, the DRX configuration is pre-configured or agreed upon by the protocol, or the DRX configuration is configured by the network device, or the DRX configuration is configured by the second terminal.

For example, the DRX configuration is configured by the network device through a system information block (System Information Block, SIB) or dedicated signaling.

In some embodiments, the synchronization sources before and after the second terminal change may be one of the synchronization sources described in table 1 above and another.

In some embodiments, the first terminal maintains a DRX-related timer if the first condition is met; alternatively, the first terminal pauses or stops the DRX-related timer.

In some embodiments, the DRX-related timer may include, but is not limited to, at least one of:

sidestream DRX continuous Timer (sl-DRX-onduration Timer), sidestream DRX deactivation Timer (sl-DRX-Inactyitytimer), sidestream DRX retransmission Timer (sl-DRX-retransmission Timer), sidestream HARQ RTT Timer (sl-HARQ-RTT-Timer).

In some embodiments, the first condition includes at least one of:

The first terminal receives information on all receiving resource pools configured for the first terminal according to the DRX configuration;

when the first terminal receives the first information;

after the first terminal receives the first information;

after the first terminal receives the first information for a first time period;

after the first terminal receives the first information and sends the second information;

the first terminal receives the first information and sends the second information;

after the first terminal receives the first information and sends the second information for a second time period;

wherein the first information is used to indicate a synchronization source that changes the synchronization source to a target type, and the second information includes positive feedback for the first information.

For example, when the first terminal is in the DRX active state, the first terminal receives the first information sent by the second terminal, so as to learn that the second terminal needs to change the synchronization source, and in order to implement DRX synchronization, the first terminal needs to receive on a receiving resource pool that receives the information or a receiving resource pool that is the same as the synchronization type of the resource pool that receives the information (where the resource pool supports the synchronization source of the target type).

For example, after the first terminal receives the first information sent by the second terminal, the first terminal may send positive feedback for the first information to the second terminal.

It should be noted that, when the first terminal is in the DRX active state, the first terminal may receive the information sent by the second terminal, and when the first terminal is in the DRX inactive state or the inactive state, the first terminal cannot receive the information sent by the second terminal.

In some embodiments, the second terminal may retransmit the first information without the second terminal receiving positive feedback for the first information. The retransmission times may be pre-configured or agreed, or agreed between the first terminal and the second terminal, or configured by the network device.

In some embodiments, the first time period may be pre-configured or agreed upon, or the first time period may be agreed upon by the first terminal with the second terminal, or the first time period may be configured by the network device, or the first time period may be determined based on an implementation of the first terminal.

In some embodiments, the second duration may be preconfigured or agreed upon by the protocol, or the second duration may be agreed upon by the first terminal with the second terminal, or the second duration may be configured by the network device, or the second duration may be determined based on the implementation of the first terminal.

In some embodiments, the first information includes at least information of a synchronization source of the target type.

In some embodiments, the first terminal receives information on one or more receiving resource pools supporting the synchronization source of the target type based on the first information. Therefore, when the second terminal generates the synchronization source conversion, the first terminal can receive the information sent by the second terminal, and DRX synchronization of the receiving and transmitting terminals can be realized.

In some embodiments, the first terminal continues the DRX-related timer that was previously suspended or stopped, or the first terminal restarts the DRX-related timer, or the first terminal maintains the DRX-active state for a target duration, if the second condition is satisfied.

In some embodiments, the target duration may be preconfigured or agreed upon, or the target duration may be agreed upon by the first terminal and the second terminal, or the target duration may be configured by the network device, or the target duration may be determined based on the implementation of the first terminal.

In some embodiments, the second condition includes at least one of:

the first terminal receives information on a resource pool for receiving the information or a receiving resource pool with the same type of synchronous source as the resource pool for receiving the information;

When the first terminal receives the third information;

after the first terminal receives the third information;

after the first terminal receives the third information for a third duration;

the first terminal receives the third information and sends fourth information;

the first terminal receives the third information and sends fourth information for a fourth time period;

the third information is synchronization confirmation information, and the fourth information is synchronization confirmation response information.

For example, when the first terminal is in the DRX active state, the first terminal receives the third information sent by the second terminal, so as to implement confirmation after the synchronization source is changed.

For example, after the first terminal receives the third information transmitted by the second terminal, the first terminal may transmit the fourth information to the second terminal to respond to the synchronization confirm information. That is, the first terminal exchanges synchronization confirmation information with the second terminal, thereby achieving DRX synchronization.

In some embodiments, the third duration may be preconfigured or agreed upon by the protocol, or the third duration may be agreed upon by the first terminal with the second terminal, or the third duration may be configured by the network device, or the third duration may be determined based on the implementation of the first terminal.

In some embodiments, the fourth time period may be preconfigured or agreed upon by the first terminal and the second terminal, or the fourth time period may be configured by the network device, or the fourth time period may be determined based on the implementation of the first terminal.

In some embodiments, the first terminal receives fifth information sent by the second terminal; and the first terminal receives information on a receiving resource pool for receiving the fifth information or a receiving resource pool with the same type of synchronization source as the receiving resource pool for receiving the fifth information.

Specifically, after the second terminal changes the synchronization source, the second terminal transmits the fifth information to the first terminal when the first terminal is in the DRX-active state. And the first terminal receives the information on the receiving resource pool for receiving the fifth information or the receiving resource pool with the same type of synchronous source as the receiving resource pool for receiving the fifth information, so that the first terminal can receive the information sent by the second terminal under the condition that the second terminal generates synchronous source conversion, and DRX synchronization of the receiving and transmitting terminals can be realized.

In some embodiments, the fifth information includes, but is not limited to, at least one of:

Data information, synchronization information, discovery information, PC5-S information.

For example, the data information is PSSCH information.

For example, the synchronization information is a side line synchronization signal (Sidelink Synchronization Signal, SLSS).

The PC5-S information may be PC5 security (PC 5-S) information. For example, upper layer information, NAS layer information, connection establishment request, and the like are possible.

In some embodiments, in a case where the first terminal performs information reception on all the reception resource pools configured to the first terminal according to the DRX configuration, the step S210 may specifically include:

for each receiving resource pool, the first terminal determines a first DRX timer according to a sidestream DRX period (sl-DRX-Cycle), a sidestream DRX initial offset (sl-DRX-StartOffset) and a sidestream DRX time slot offset (sl-DRX-slotOffset); and/or the number of the groups of groups,

for each receiving resource pool, when the first terminal receives the new PSCCH or PSSCH information, or after the first terminal receives the new PSCCH or PSSCH information for a second period of time, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the first terminal starts or restarts a second DRX timer; and/or the number of the groups of groups,

For each receive resource pool, the first terminal starts or restarts a third DRX timer after the HARQ RTT timer expires, or after PSCCH or PSSCH decoding fails, or after sidestream control information (Sidelink Control Information, SCI) information or PSSCH information is received.

In some embodiments, in a case where the first terminal performs information reception on a resource pool receiving information or a reception resource pool having a synchronization source of the same type as the resource pool receiving information according to the DRX configuration, the step S210 may specifically include:

for a resource pool for receiving information or a receiving resource pool with the same type of synchronous source as the resource pool for receiving information, the first terminal determines a first DRX timer according to a sidestream DRX period (sl-DRX-Cycle), a sidestream DRX initial offset (sl-DRX-StartOffset) and a sidestream DRX time slot offset (sl-DRX-slotOffset); and/or the number of the groups of groups,

for a resource pool of received information or a receiving resource pool of a synchronization source with the same type as the resource pool of received information, when the first terminal receives new PSCCH or PSSCH information, or after the first terminal receives the second duration of the new PSCCH or PSSCH information, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the first terminal starts or restarts a second DRX timer; and/or the number of the groups of groups,

For the resource pool receiving the information or the receiving resource pool having the same type of synchronization source as the resource pool receiving the information, after the HARQ RTT timer times out, or after PSCCH or PSSCH decoding fails, or after SCI or PSSCH information is received, the first terminal starts or restarts a third DRX timer.

In some embodiments, the first DRX timer may be a sidestream DRX duration timer (sl-DRX-onduration timer).

In some embodiments, the second DRX timer may be a sidestream DRX deactivation timer (sl-DRX-Inactigytimer).

In some embodiments, the third DRX timer may be a sidestream DRX retransmission timer (sl-DRX-retransmission timer).

Therefore, in the embodiment of the present application, the first terminal performs information reception on all the reception resource pools configured to the first terminal according to the DRX configuration, or performs information reception on the reception resource pool that receives the information or the reception resource pool that has the same type of synchronization source as the reception resource pool that receives the information. That is, for the receiving terminal, information is received on all the receiving resource pools according to the DRX configuration, or information is received on the receiving resource pool of the receiving information or the receiving resource pool of the synchronizing source having the same type as the receiving resource pool of the receiving information, so that when the synchronizing source of the transmitting terminal changes, the receiving terminal can be ensured to receive the information transmitted by the transmitting terminal, and DRX synchronization of both transmitting and receiving terminals can also be realized.

The first terminal side embodiment of the present application is described in detail above with reference to fig. 4, and the second terminal side embodiment of the present application is described in detail below with reference to fig. 5, it being understood that the second terminal side embodiment corresponds to the first terminal side embodiment, and similar descriptions can be made with reference to the first terminal side embodiment.

Fig. 5 is a schematic flow chart of a method 300 of wireless communication, suitable for sidestream transmission between a first terminal and a second terminal, as shown in fig. 5, where the method 300 of wireless communication may be performed by the second terminal, and where the method 300 of wireless communication may include at least some of the following:

s310, the second terminal maintains the DRX-related timer during a process of changing the synchronization source of the second terminal from the first synchronization source to the second synchronization source, or the second terminal pauses or stops the DRX-related timer.

In the embodiment of the present application, in a process that the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source, the first terminal and the second terminal keep the DRX related timer, or the first terminal and the second terminal pause or stop the DRX related timer. Therefore, DRX synchronization of the receiving and transmitting terminals is realized under the condition that the second terminal generates synchronization source conversion, and the first terminal can be ensured to receive information sent by the second terminal.

In some embodiments, the first synchronization source may be one of the synchronization sources described in table 1 above and the second synchronization source may be another of the synchronization sources described in table 1 above.

In some embodiments, in the case that the second terminal maintains the DRX-related timer during the synchronization source change, the second terminal determines the DRX activation time of the first terminal according to the synchronization compensation value and the DRX configuration between the second synchronization source and the first synchronization source.

In some embodiments, the units of synchronization compensation values include, but are not limited to, one of:

subframe, slot, symbol, millisecond.

In some embodiments, in the case where the second terminal maintains the DRX-related timer during the synchronization source change, the second terminal may perform the following operations:

when the second terminal changes from the first synchronization source to the second synchronization source during the operation of the first DRX timer, the second terminal determines the operation time of the first DRX timer in the transmission resource pool for information transmission after the synchronization source is changed according to a side DRX Cycle (sl-DRX-Cycle), a side DRX start offset (sl-DRX-StartOffset), and a side DRX slot offset (sl-DRX-slotooffset); and/or the number of the groups of groups,

When the second terminal changes from the first synchronization source to the second synchronization source during the operation of the second DRX timer, the second terminal determines the operation time of the second DRX timer in the transmission resource pool for information transmission after the synchronization source is changed according to the starting time and the operation time of the second DRX timer in the transmission resource pool for information transmission before the synchronization source is changed and the synchronization compensation value.

In some embodiments, the second DRX timer may be a sidestream DRX deactivation timer (sl-DRX-inactivity timer) or a sidestream DRX retransmission timer (sl-DRX-retransmission timer).

In some embodiments, the second terminal transmits information on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration, with the first terminal in a DRX active state.

In some embodiments, the second terminal pauses or stops the DRX-related timer if the third condition is met.

In some embodiments, the third condition includes at least one of:

when the second terminal sends the first information;

after the second terminal sends the first information;

after the second terminal sends the first information for a fifth time period;

after the second terminal sends the first information and receives the second information;

the second terminal sends the first information and receives the second information;

after the second terminal sends the first information and receives the second information for a sixth time period;

In some embodiments, after transmitting the first information, the second terminal enters a DRX active state, or the second terminal enters a state in which data can be received.

In some embodiments, the second terminal resends the first information without receiving positive feedback for the first information. The retransmission times may be pre-configured or agreed, or agreed between the first terminal and the second terminal, or configured by the network device.

In some embodiments, the fifth duration may be preconfigured or agreed upon by the protocol, or the fifth duration may be agreed upon by the first terminal with the second terminal, or the fifth duration may be configured by the network device, or the fifth duration may be determined based on the implementation of the second terminal.

In some embodiments, the sixth duration may be preconfigured or agreed upon by the first terminal and the second terminal, or the sixth duration may be configured by the network device, or the sixth duration may be determined based on implementation of the second terminal.

In some embodiments, in case the fourth condition is met, the second terminal continues the DRX-related timer that was previously suspended or stopped, or the second terminal restarts the DRX-related timer, or the second terminal may send information to the first terminal for a target duration.

In some embodiments, the target duration may be preconfigured or agreed upon, or the target duration may be agreed upon by the first terminal and the second terminal, or the target duration may be configured by the network device, or the target duration may be determined based on implementation of the second terminal.

In some embodiments, the fourth condition includes at least one of:

when the second terminal sends third information;

after the second terminal sends the third information;

after the second terminal sends the third information for a seventh time period;

after the second terminal sends the third information and receives the fourth information;

when the second terminal sends third information and receives fourth information;

after the second terminal sends the third information and receives the fourth information for an eighth time period;

In some embodiments, the seventh duration may be preconfigured or agreed upon by the protocol, or the seventh duration may be agreed upon by the first terminal and the second terminal, or the seventh duration may be configured by the network device, or the seventh duration may be determined based on implementation of the second terminal.

In some embodiments, the eighth time period may be preconfigured or agreed upon by the protocol, or the eighth time period may be agreed upon by the first terminal and the second terminal, or the eighth time period may be configured by the network device, or the eighth time period may be determined based on the implementation of the second terminal.

In some embodiments, in the case where the second terminal pauses or stops the DRX-related timer during the synchronization source change, after the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source, and the first terminal is in a DRX-active state, the second terminal transmits fifth information to the first terminal on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.

Specifically, the first terminal performs information reception on a reception resource pool that receives the fifth information or a reception resource pool that has the same type of synchronization source as the reception resource pool that receives the fifth information. Therefore, when the second terminal generates the synchronization source conversion, the first terminal can receive the information sent by the second terminal, and DRX synchronization of the receiving and transmitting terminals can be realized.

In some embodiments, the fifth information includes at least one of:

In some embodiments, the DRX configuration is for a side uplink between the first terminal and a second terminal. For example, the first terminal may perform information reception on a reception resource pool according to the DRX configuration, and the second terminal may perform information transmission on a transmission resource pool according to the DRX configuration.

In the embodiment of the present application, the information sent and received may be data, or may be a signal or other information types, which is not limited in this application.

In some embodiments, the DRX configuration is pre-configured or agreed upon by a protocol, or the DRX configuration is configured by a network device, or the DRX configuration is configured by the first terminal.

For example, the DRX configuration is configured by the network device through SIB or dedicated signaling.

Therefore, in the embodiment of the present application, the first terminal and the second terminal maintain the DRX-related timer in the process of changing the synchronization source of the second terminal from the first synchronization source to the second synchronization source; alternatively, the first terminal and the second terminal suspend or stop the DRX-related timer. That is, for the transmitting and receiving terminals, the DRX related timer is maintained during the process of changing the synchronization source of the transmitting terminal, or the DRX related timer is paused or stopped, so that DRX synchronization of both transmitting and receiving terminals is realized when the synchronization source of the transmitting terminal changes, and the receiving terminal is ensured to receive the information transmitted by the transmitting terminal.

The technical scheme of the present application is described in detail below by examples 1 to 3.

In embodiment 1, the receiving UE (i.e. UE2, corresponding to the first terminal) receives information on all the received resource pools based on the DRX configuration, and the DRX related timer is not stopped during the process of switching synchronization sources by the sending UE (i.e. UE1, corresponding to the second terminal). As shown in fig. 6, in embodiment 1, UE1 and UE2 perform DRX synchronization by performing the procedures described in S11 to S16 below.

S11, the UE2 acquires DRX configuration.

Wherein the DRX configuration is for a side-uplink between UE1 and UE 2.

The DRX configuration may be obtained by:

pre-configuration or protocol conventions;

the network side is configured through SIB or special signaling;

UE1 configuration.

S12, the UE2 receives information on all the reception resource pools configured to the UE2 according to the DRX configuration.

For example, for each reception resource pool, UE2 determines a sidestream DRX duration timer (sl-DRX-onduration timer) from a sidestream DRX Cycle (sl-DRX-Cycle), a sidestream DRX start offset (sl-DRX-StartOffset), and a sidestream DRX slot offset (sl-DRX-slotOffset).

For another example, for each received resource pool, when UE2 receives the new PSCCH or PSSCH information, or after UE2 receives the new PSCCH or PSSCH information for a period of time, or when UE2 sends HARQ feedback, or after UE2 sends HARQ feedback, UE2 starts or restarts a side-row DRX deactivation timer (sl-DRX-inactivity timer).

For another example, after the HARQ RTT timer expires, or after PSCCH or PSSCH decoding fails, or after UE2 receives SCI information, UE2 starts or restarts a sidestream DRX retransmission timer (sl-DRX-retransmission timer).

S13, UE1 synchronizes to the new synchronization source and transmits using a transmission resource pool (Tx pool) supporting the synchronization source.

S14, the UE1 calculates a synchronization compensation value between the new synchronization source and the old synchronization source.

Wherein the unit of the synchronization compensation value may include one of:

subframe, slot, symbol, millisecond.

S15, the UE1 judges the DRX activation time of the UE2 according to the synchronous compensation value and the DRX configuration.

For example, if the synchronization source is switched during the side DRX duration timer (sl-DRX-onduration timer) operation, the UE1 determines the operation time of the sl-DRX-onduration timer in the new Tx pool according to the side DRX Cycle (sl-DRX-Cycle), the side DRX start offset (sl-DRX-StartOffset), and the side DRX slot offset (sl-DRX-slotOffset).

For example, if the synchronization source is switched during the running period of the sidestream DRX inactivity timer (sl-DRX-inactivity timer), the UE1 determines the running time of the sl-DRX-inactivity timer in the new Tx pool according to the synchronization offset value, the sl-DRX-inactivity timer on time on the original Tx pool, and the sl-DRX-inactivity timer value.

For example, if the synchronization source is switched during the operation of the sidestream DRX retransmission timer (sl-DRX-retransmission timer), the UE1 determines the operation time of the sl-DRX-retransmission timer in the new Tx pool according to the synchronization offset, the sl-DRX-retransmission timer on time on the original Tx pool, and the sl-DRX-retransmission timer value.

S16, UE1 sends information to UE2 during the DRX activation time of UE2 and continues to transmit information in the new Tx pool based on the DRX configuration.

In embodiment 2, the receiving UE (i.e. UE2, corresponding to the first terminal) performs information reception on the receiving resource pool receiving the information or the same source as the source of synchronization of the resource pool based on the DRX configuration, and the sending UE (i.e. UE1, corresponding to the second terminal) notifies the receiving UE of the change of the source of synchronization during the process of switching the source of synchronization, and the receiving UE synchronously receives the resource pool (Rx pool) to synchronize DRX. As shown in fig. 7, in embodiment 2, UE1 and UE2 perform DRX synchronization by performing the procedures described in S21 to S31 below.

S21, UE2 acquires DRX configuration.

Wherein the DRX configuration is for a side-uplink between UE1 and UE 2.

The DRX configuration may be obtained by:

pre-configuration or protocol conventions;

the network side is configured through SIB or special signaling;

UE1 configuration.

S22, the UE2 performs discontinuous reception operation according to the DRX configuration on a reception resource pool (Rx pool) where data is received or on the same Rx pool as the Rx pool synchronization source.

S23, UE1 transmits the synchronization source change notification information to UE 2.

Wherein the synchronization source change notification information contains new synchronization source synchronization information.

The synchronization source change notification information is to be transmitted during the UE2DRX activation period.

In some implementations, after sending the synchronization source change notification information, UE1 enters a DRX active state (if DRX is configured) or a receivable data state waits for feedback information from UE 2.

S24, the UE2 receives the synchronous source change notification information and feeds back to the UE 1.

S25, UE1 receives positive feedback from UE2, pauses or stops the DRX related timer.

In some real ways, in case that the UE1 does not receive positive feedback, the UE1 retransmits the synchronization source change notification information.

In some implementations, the DRX-related timer may include, but is not limited to, at least one of:

S26, when the UE2 transmits the positive feedback, or after transmitting the positive feedback, or after a period of time after transmitting the positive feedback, the DRX related timer is suspended or stopped.

S27, UE1 synchronizes to the new synchronization source.

S28, the UE2 receives using the Rx pool supporting the new synchronization source of the UE1 according to the UE1 instruction (i.e., the new synchronization source indicated in the synchronization source change notification information).

S29, UE1 exchanges synchronization confirmation information with UE 2.

S30, the UE1 continues the DRX related timer, or restarts the DRX related timer, or remains in the DRX active state for a period of time.

S31, the UE2 continues the DRX related timer, or restarts the DRX related timer, or remains in the DRX active state for a period of time.

In embodiment 3, the receiving UE (i.e. UE2, corresponding to the first terminal) receives information from the reception resource pool or the same source for synchronization with the resource pool based on the DRX configuration. The sender UE (i.e. UE1, corresponding to the second terminal) stops the DRX related timer during the process of switching the synchronization source, and waits for the receiver UE to enter the DRX active state after switching is completed, and then sends information. As shown in fig. 8, in embodiment 3, UE1 and UE2 perform DRX synchronization by performing the procedures described in S41 to S46 below.

S41, UE2 acquires DRX configuration.

Wherein the DRX configuration is for a side-uplink between UE1 and UE 2.

The DRX configuration may be obtained by:

pre-configuration or protocol conventions;

the network side is configured through SIB or special signaling;

UE1 configuration.

S42, the UE2 performs discontinuous reception operation according to the DRX configuration on the Rx pool where data is received or on the same Rx pool as the Rx pool synchronization source.

S43, UE1 stops the DRX related timer.

S44, UE1 synchronizes to the new synchronization source.

S45, UE1 waits for UE2 to enter the DRX active state and then sends information to UE2, where the information may be:

data information such as PSSCH information;

synchronization information, such as SLSS information;

discovery information;

PC5-S information.

S46, the UE2 receives at the Rx pool where information is received or at the same Rx pool as the Rx pool synchronization source according to the DRX configuration.

The method embodiments of the present application are described in detail above with reference to fig. 4 to 8, and the apparatus embodiments of the present application are described in detail below with reference to fig. 9 to 13, it being understood that the apparatus embodiments and the method embodiments correspond to each other, and similar descriptions may refer to the method embodiments.

Fig. 9 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. The terminal device 400 is suitable for sidestream transmission between a first terminal and a second terminal, as shown in fig. 9, where the terminal device 400 includes:

And a communication unit 410, configured to perform information reception on all the reception resource pools configured for the first terminal according to the discontinuous reception DRX configuration, or perform information reception on a reception resource pool that receives information or a reception resource pool having a synchronization source of the same type as the reception resource pool that receives information.

In some embodiments, the terminal device 400 further comprises: a processing unit 420, wherein,

in case the first condition is met, the processing unit 420 is configured to maintain a DRX related timer; alternatively, the processing unit 420 is configured to suspend or stop the DRX related timer.

In some embodiments, the first condition includes at least one of:

the first terminal receives information on all receiving resource pools configured to the first terminal according to the DRX configuration;

when the first terminal receives the first information;

after the first terminal receives the first information;

In some embodiments, the processing unit 420 is further configured to receive information on one or more receiving resource pools supporting the synchronization source of the target type according to the first information.

in case the second condition is met, the processing unit 420 is configured to continue the DRX related timer that was previously suspended or stopped, or the processing unit 420 is configured to restart the DRX related timer, or the processing unit 420 is configured to maintain the DRX active state for the target duration.

In some embodiments, the second condition includes at least one of:

when the first terminal receives the third information;

after the first terminal receives the third information;

After the first terminal receives the third information for a third duration;

the first terminal receives the third information and sends fourth information;

In some embodiments, the first terminal is in a DRX active state,

the communication unit 410 is further configured to receive fifth information sent by the second terminal;

the communication unit 410 is further configured to perform information reception on a reception resource pool that receives the fifth information or a reception resource pool that has the same type of synchronization source as the reception resource pool that receives the fifth information.

In some embodiments, the fifth information includes at least one of:

In some embodiments, the first terminal performs information reception on all reception resource pools configured to the first terminal according to the DRX configuration, and the terminal apparatus 400 further includes: a processing unit 420, wherein,

for each receiving resource pool, the processing unit 420 is configured to determine a first DRX timer according to a sidestream DRX cycle, a sidestream DRX start offset, and a sidestream DRX slot offset; and/or the number of the groups of groups,

For each receiving resource pool, when the first terminal receives the new PSCCH or PSSCH information of the physical sidelink control channel, or after the first terminal receives the new PSCCH or PSSCH information for a second period, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the processing unit 420 is configured to start or restart a second DRX timer; and/or the number of the groups of groups,

for each receive resource pool, the processing unit 420 is configured to start or restart the third DRX timer after the HARQ round trip time RTT timer expires, or after PSCCH or PSSCH decoding fails, or after receiving side control information SCI information or PSSCH information.

In some embodiments, the first terminal performs information reception on a resource pool receiving information or a reception resource pool having a synchronization source of the same type as the resource pool receiving information according to the DRX configuration, and the terminal apparatus 400 further includes: a processing unit 420, wherein,

for the resource pool receiving the information or the receiving resource pool having the same type of synchronization source as the resource pool receiving the information, the processing unit 420 is configured to determine a first DRX timer according to a sidestream DRX cycle, a sidestream DRX start offset, and a sidestream DRX slot offset; and/or the number of the groups of groups,

For the resource pool of the received information or the receiving resource pool of the synchronization source with the same type as the resource pool of the received information, when the first terminal receives the new PSCCH or PSSCH information, or after the first terminal receives the second duration of the new PSCCH or PSSCH information, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the processing unit 420 is configured to start or restart a second DRX timer; and/or the number of the groups of groups,

for the resource pool receiving the information or the receiving resource pool having the same type of synchronization source as the resource pool receiving the information, the processing unit 420 is configured to start or restart the third DRX timer after the HARQ RTT timer expires, or after PSCCH or PSSCH decoding fails, or after SCI or PSSCH information is received.

In some embodiments, the DRX configuration is for a side uplink between the first terminal and the second terminal.

In some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the first terminal in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 400 are respectively for implementing the corresponding flow of the first terminal in the method 200 shown in fig. 4, which is not repeated herein for brevity.

Fig. 10 shows a schematic block diagram of a terminal device 500 according to an embodiment of the present application. The terminal device 500 is suitable for sidestream transmission between a first terminal and a second terminal, as shown in fig. 10, where the terminal device 500 includes:

a processing unit 510, configured to maintain the DRX related timer or suspend or stop the DRX related timer during a process of changing the synchronization source of the second terminal from the first synchronization source to the second synchronization source.

In some embodiments, the second terminal maintains a DRX-related timer during the synchronization source change,

the processing unit 510 is further configured to determine a DRX activation time of the first terminal according to the synchronization compensation value and the DRX configuration between the second synchronization source and the first synchronization source.

In some embodiments, the units of synchronization compensation value include one of:

Subframe, slot, symbol, millisecond.

In some embodiments, in a case that the second terminal changes from the first synchronization source to the second synchronization source during the operation of the first DRX timer, the processing unit 510 is further configured to determine an operation time of the first DRX timer in the transmission resource pool for information transmission after the synchronization source is changed according to a sidestream DRX cycle, a sidestream DRX start offset, and a sidestream DRX slot offset; and/or the number of the groups of groups,

in the case that the second terminal changes from the first synchronization source to the second synchronization source during the operation of the second DRX timer, the processing unit 510 is further configured to determine the operation time of the second DRX timer in the transmission resource pool for information transmission after the synchronization source change according to the start time and the operation time of the second DRX timer in the transmission resource pool for information transmission before the synchronization source change, and the synchronization compensation value.

In some embodiments, the first terminal is in a DRX-active state, and the terminal device 500 further includes: a communication unit 520, wherein,

the communication unit 520 is configured to perform information transmission on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.

In some embodiments, the processing unit 510 is specifically configured to:

in case the third condition is met, the DRX related timer is paused or stopped.

In some embodiments, the third condition includes at least one of:

when the second terminal sends the first information;

after the second terminal sends the first information;

after the second terminal sends the first information for a fifth time period;

In some embodiments, the communication unit 520 is further configured to retransmit the first information without receiving positive feedback for the first information.

In some embodiments, in case the fourth condition is met, the processing unit 510 is further configured to continue the DRX-related timer that was previously suspended or stopped, or the processing unit 510 is further configured to restart the DRX-related timer, or the second terminal may send information to the first terminal within the target duration.

In some embodiments, the fourth condition includes at least one of:

when the second terminal sends third information;

after the second terminal sends the third information;

In some embodiments, the second terminal pauses or stops the DRX-related timer during the synchronization source change, and the terminal device 500 further comprises: a communication unit 520, wherein,

after the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source and the first terminal is in a DRX-active state, the communication unit 520 is configured to send fifth information to the first terminal on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.

In some embodiments, the fifth information includes at least one of:

In some embodiments, the DRX configuration is for a side uplink between the first terminal and a second terminal.

It should be understood that the terminal device 500 according to the embodiment of the present application may correspond to the second terminal in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 500 are respectively for implementing the corresponding flow of the second terminal in the method 300 shown in fig. 5, which is not described herein for brevity.

Fig. 11 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device 600 shown in fig. 11 comprises a processor 610, from which the processor 610 may call and run a computer program to implement the method in the embodiments of the present application.

In some embodiments, as shown in fig. 11, the communication device 600 may also include a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in 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.

In some embodiments, as shown in fig. 11, 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 transmit information or data to other devices, or receive information or data transmitted 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.

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

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

Fig. 12 is a schematic structural view of an apparatus of an embodiment of the present application. The apparatus 700 shown in fig. 12 includes a processor 710, and the processor 710 may call and execute a computer program from a memory to implement the methods in the embodiments of the present application.

In some embodiments, as shown in fig. 12, the apparatus 700 may further include a memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in 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.

In some embodiments, the apparatus 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

In some embodiments, the apparatus 700 may further comprise 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.

In some embodiments, the apparatus may be applied to a terminal device in the embodiments of the present application, and the apparatus may implement a corresponding flow implemented by the first terminal in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the apparatus may be applied to a terminal device in the embodiments of the present application, and the apparatus may implement a corresponding flow implemented by the second terminal in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the device mentioned in the embodiments of the present application may also be a chip. For example, a system-on-chip or a system-on-chip, etc.

Fig. 13 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. As shown in fig. 13, the communication system 800 includes a first terminal 810 and a second terminal 820.

The first terminal 810 may be used to implement the corresponding functions implemented by the first terminal in the above method, and the second terminal 820 may be used to implement the corresponding functions implemented by the second terminal in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either 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) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

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.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

In some embodiments, the computer readable storage medium may be applied to a terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the first terminal in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the computer readable storage medium may be applied to a terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the second terminal in each method in the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

In some embodiments, the computer program product may be applied to a terminal device in an embodiment of the present application, and the computer program instructions cause the computer to execute a corresponding procedure implemented by the first terminal in each method in the embodiment of the present application, which is not described herein for brevity.

In some embodiments, the computer program product may be applied to a terminal device in an embodiment of the present application, and the computer program instructions cause the computer to execute 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.

The embodiment of the application also provides a computer program.

In some embodiments, the computer program may be applied to the terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the first terminal in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the computer program may be applied to the terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the second terminal in each method in the embodiments of the present application, which is not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope 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.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. For such understanding, the technical solutions of the present application may be embodied in essence or in a part contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the 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 are intended to be covered by the 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 method of wireless communication adapted for sidestream transmissions between a first terminal and a second terminal, the method comprising:

and the first terminal receives information on all the receiving resource pools configured for the first terminal according to Discontinuous Reception (DRX) configuration, or receives information on the receiving resource pool for receiving information or the receiving resource pool with the same type of synchronous source as the receiving resource pool for receiving information.
The method of claim 1, wherein the method further comprises:

in case that a first condition is satisfied, the first terminal maintains a DRX-related timer; alternatively, the first terminal pauses or stops the DRX-related timer.
The method of claim 2, wherein the first condition comprises at least one of:

The first terminal receives information on all receiving resource pools configured for the first terminal according to the DRX configuration;

when the first terminal receives first information;

after the first terminal receives the first information;

the first terminal receives the first information for a first time period;

after the first terminal receives the first information and sends the second information;

the first terminal receives the first information and sends the second information;

after the first terminal receives the first information and sends the second information for a second time period;

wherein the first information is used for indicating that the synchronization source is changed to a synchronization source of a target type, and the second information comprises positive feedback for the first information.
A method as claimed in claim 3, wherein the first information comprises at least information of a synchronization source of the target type.
The method of claim 3 or 4, wherein the method further comprises:

and the first terminal receives information on one or more receiving resource pools supporting the synchronization source of the target type according to the first information.
The method of any one of claims 1 to 5, wherein the method further comprises:

And under the condition that the second condition is met, the first terminal continues to pause or stop the DRX related timer before, or the first terminal restarts the DRX related timer, or the first terminal keeps the DRX activated state in the target duration.
The method of claim 6, wherein the second condition comprises at least one of:

the first terminal receives information on a resource pool for receiving the information or a receiving resource pool with the same type of synchronous source as the resource pool for receiving the information;

when the first terminal receives the third information;

after the first terminal receives the third information;

after the first terminal receives the third information for a third duration;

after the first terminal receives the third information and sends fourth information;

the first terminal receives the third information and sends fourth information;

after the first terminal receives the third information and sends fourth information for a fourth time period;

the third information is synchronization confirmation information, and the fourth information is synchronization confirmation response information.
The method of claim 1, wherein the first terminal is in a DRX active state, the method further comprising:

The first terminal receives fifth information sent by the second terminal;

and the first terminal receives information on a receiving resource pool for receiving the fifth information or a receiving resource pool with the same type of synchronization source as the receiving resource pool for receiving the fifth information.
The method of claim 8, wherein the fifth information comprises at least one of:

data information, synchronization information, discovery information, PC5-S information.
The method according to any of claims 1 to 9, wherein the first terminal performs information reception on all reception resource pools configured to the first terminal according to the DRX configuration, the method further comprising:

for each receiving resource pool, the first terminal determines a first DRX timer according to a sidestream DRX period, a sidestream DRX initial offset and a sidestream DRX time slot offset; and/or the number of the groups of groups,

for each receiving resource pool, when the first terminal receives the PSCCH or PSSCH information of the new physical sidestream control channel, or after the first terminal receives the PSCCH or PSSCH information for a second time period, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the first terminal starts or restarts a second DRX timer; and/or the number of the groups of groups,

For each receiving resource pool, after the HARQ round trip time RTT timer expires, or after PSCCH or PSSCH decoding fails, or after receiving side control information SCI or PSSCH information, the first terminal starts or restarts a third DRX timer.
The method according to any of claims 1 to 9, wherein the first terminal performs information reception on a reception resource pool of a resource pool of reception information or a synchronization source having the same type as the reception resource pool of reception information according to the DRX configuration, the method further comprising:

for a resource pool receiving information or a receiving resource pool with the same type of synchronous source as the resource pool receiving information, the first terminal determines a first DRX timer according to a side DRX period, a side DRX initial offset and a side DRX time slot offset; and/or the number of the groups of groups,

for a resource pool of received information or a receiving resource pool of a synchronous source with the same type as the resource pool of received information, starting or restarting a second DRX timer by the first terminal when the first terminal receives new PSCCH or PSSCH information, or after the first terminal receives the second time period of the new PSCCH or PSSCH information, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback; and/or the number of the groups of groups,

For the resource pool receiving the information or the receiving resource pool with the same type of synchronous source as the resource pool receiving the information, after the HARQ RTT timer is overtime, or after PSCCH or PSSCH fails to decode, or after SCI information or PSSCH information is received, the first terminal starts or restarts a third DRX timer.
The method according to any of claims 1 to 11, wherein the DRX configuration is for a side-link between the first terminal and the second terminal.
The method according to any of claims 1 to 12, wherein the DRX configuration is pre-configured or protocol agreed, or the DRX configuration is network device configured, or the DRX configuration is configured for the second terminal.
A method of wireless communication adapted for sidestream transmissions between a first terminal and a second terminal, the method comprising:

and maintaining the Discontinuous Reception (DRX) related timer by the second terminal in the process of changing the synchronous source of the second terminal from the first synchronous source to the second synchronous source, or suspending or stopping the DRX related timer by the second terminal.
The method of claim 14, wherein the second terminal maintains a DRX-related timer during a synchronization source change, the method further comprising:

And the second terminal determines the DRX activation time of the first terminal according to the synchronization compensation value and the DRX configuration between the second synchronization source and the first synchronization source.
The method of claim 15, wherein the units of synchronization compensation value comprise one of:

subframe, slot, symbol, millisecond.
The method of claim 15 or 16, wherein the method further comprises:

when the second terminal changes from the first synchronous source to the second synchronous source during the operation of the first DRX timer, the second terminal determines the operation time of the first DRX timer in a transmission resource pool for information transmission after the synchronous source is changed according to a sidestream DRX period, a sidestream DRX initial offset and a sidestream DRX time slot offset; and/or the number of the groups of groups,

and under the condition that the second terminal is changed from the first synchronous source to the second synchronous source during the operation of the second DRX timer, the second terminal determines the operation time of the second DRX timer in the transmission resource pool for information transmission after the synchronous source is changed according to the starting time and the operation time of the second DRX timer in the transmission resource pool for information transmission before the synchronous source is changed and the synchronous compensation value.
The method according to any of claims 15 to 17, wherein the first terminal is in a DRX active state, the method further comprising:

and the second terminal performs information transmission on one or more transmission resource pools supporting the second synchronization source according to the DRX configuration.
The method of claim 14, wherein the second terminal pauses or stops a DRX related timer, comprising:

in case the third condition is met, the second terminal pauses or stops the DRX-related timer.
The method of claim 19, wherein the third condition comprises at least one of:

when the second terminal sends first information;

after the second terminal sends the first information;

after the second terminal sends the first information for a fifth time period;

the second terminal sends the first information and receives the second information;

the second terminal sends the first information and receives the second information;

after the second terminal sends the first information and receives the second information for a sixth time period;

wherein the first information is used for indicating that the synchronization source is changed to a synchronization source of a target type, and the second information comprises positive feedback for the first information.
The method of claim 20, wherein the first information comprises at least information of a synchronization source of the target type.
The method of claim 20 or 21, wherein the method further comprises:

after the first information is sent, the second terminal enters a DRX activation state, or the second terminal enters a state of being capable of receiving data.
The method of any one of claims 20 to 22, wherein the method further comprises:

the second terminal resends the first information without receiving positive feedback for the first information.
The method of any one of claims 19 to 23, wherein the method further comprises:

and under the condition that the fourth condition is met, the second terminal continues to pause or stop the DRX related timer before, or the second terminal restarts the DRX related timer, or the second terminal can send information to the first terminal in the target duration.
The method of claim 24, wherein the fourth condition comprises at least one of:

when the second terminal sends third information;

After the second terminal sends the third information;

after the second terminal sends the third information for a seventh time period;

after the second terminal sends the third information and receives the fourth information;

the second terminal sends third information and receives fourth information;

after the second terminal sends the third information and receives the eighth time length of the fourth information;

the third information is synchronization confirmation information, and the fourth information is synchronization confirmation response information.
The method of claim 14, wherein the second terminal pauses or stops a DRX related timer during a synchronization source change, the method further comprising:

after the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source, and the first terminal is in a DRX activated state, the second terminal transmits fifth information to the first terminal on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.
The method of claim 26, wherein the fifth information comprises at least one of:

data information, synchronization information, discovery information, PC5-S information.
The method according to any of claims 15 to 18, 26 to 27, wherein the DRX configuration is for a side-link between the first terminal and a second terminal.
The method according to any of claims 15 to 18, 26 to 28, wherein the DRX configuration is pre-configured or protocol agreed, or wherein the DRX configuration is network device configured, or wherein the DRX configuration is configured for the first terminal.
A terminal device adapted for sidestream transmission between a first terminal and a second terminal, said terminal device being said first terminal, said terminal device comprising:

and the communication unit is used for receiving information on all the receiving resource pools configured for the first terminal according to Discontinuous Reception (DRX) configuration, or receiving information on the receiving resource pool for receiving information or the receiving resource pool with the same type of synchronous source as the receiving resource pool for receiving information.
The terminal device of claim 30, wherein the terminal device further comprises: a processing unit, wherein,

the processing unit is configured to maintain a DRX-related timer if a first condition is met; alternatively, the processing unit is configured to suspend or stop the DRX related timer.
The terminal device of claim 31, wherein the first condition comprises at least one of:

the first terminal receives information on all receiving resource pools configured for the first terminal according to the DRX configuration;

when the first terminal receives first information;

after the first terminal receives the first information;

the first terminal receives the first information for a first time period;

after the first terminal receives the first information and sends the second information;

the first terminal receives the first information and sends the second information;

after the first terminal receives the first information and sends the second information for a second time period;

wherein the first information is used for indicating that the synchronization source is changed to a synchronization source of a target type, and the second information comprises positive feedback for the first information.
The terminal device of claim 32, wherein the first information includes at least information of a synchronization source of the target type.
The terminal device of claim 32 or 33, wherein the processing unit is further configured to perform information reception on one or more reception resource pools supporting synchronization sources of the target type based on the first information.
The terminal device according to any of the claims 30 to 34, wherein the terminal device further comprises: a processing unit, wherein,

and under the condition that the second condition is met, the processing unit is used for continuing the DRX related timer which is paused or stopped before, or the processing unit is used for restarting the DRX related timer, or the processing unit is used for keeping the DRX activated state in the target duration.
The terminal device of claim 35, wherein the second condition comprises at least one of:

the first terminal receives information on a resource pool for receiving the information or a receiving resource pool with the same type of synchronous source as the resource pool for receiving the information;

when the first terminal receives the third information;

after the first terminal receives the third information;

after the first terminal receives the third information for a third duration;

after the first terminal receives the third information and sends fourth information;

the first terminal receives the third information and sends fourth information;

after the first terminal receives the third information and sends fourth information for a fourth time period;

the third information is synchronization confirmation information, and the fourth information is synchronization confirmation response information.
The terminal device of claim 30, wherein the first terminal is in a DRX active state,

the communication unit is further used for receiving fifth information sent by the second terminal;

the communication unit is further configured to perform information reception on a reception resource pool that receives the fifth information or a reception resource pool that has a synchronization source of the same type as the reception resource pool that receives the fifth information.
The terminal device of claim 37, wherein the fifth information comprises at least one of:

data information, synchronization information, discovery information, PC5-S information.
The terminal device according to any of the claims 30 to 38, wherein the first terminal performs information reception on all reception resource pools configured to the first terminal according to the DRX configuration, the terminal device further comprising: a processing unit, wherein,

for each receiving resource pool, the processing unit is used for determining a first DRX timer according to a sidestream DRX period, a sidestream DRX initial offset and a sidestream DRX time slot offset; and/or the number of the groups of groups,

for each receiving resource pool, when the first terminal receives the new physical sidelink control channel PSCCH or physical sidelink shared channel PSSCH information, or after the first terminal receives the new PSCCH or PSSCH information for a second period of time, or when the first terminal sends hybrid automatic repeat request HARQ feedback, or after the first terminal sends HARQ feedback, the processing unit is configured to start or restart a second DRX timer; and/or the number of the groups of groups,

For each receiving resource pool, after the HARQ round trip time RTT timer expires, or after PSCCH or PSSCH decoding fails, or after receiving side control information SCI or PSSCH information, the processing unit is configured to start or restart a third DRX timer.
The terminal device according to any of the claims 30 to 38, wherein the first terminal performs information reception on a reception resource pool of a resource pool of reception information or a synchronization source of the same type as the reception resource pool of reception information according to the DRX configuration, the terminal device further comprising: a processing unit, wherein,

for the resource pool receiving the information or the receiving resource pool with the same type of synchronous source as the resource pool receiving the information, the processing unit is used for determining a first DRX timer according to the sidestream DRX period, the sidestream DRX initial offset and the sidestream DRX time slot offset; and/or the number of the groups of groups,

for a resource pool of received information or a receiving resource pool of a synchronization source with the same type as the resource pool of received information, when the first terminal receives new PSCCH or PSSCH information, or after the first terminal receives the second duration of the new PSCCH or PSSCH information, or when the first terminal sends HARQ feedback, or after the first terminal sends HARQ feedback, the processing unit is configured to start or restart a second DRX timer; and/or the number of the groups of groups,

For the resource pool receiving the information or the receiving resource pool having the same type of synchronization source as the resource pool receiving the information, the processing unit is configured to start or restart the third DRX timer after the HARQ RTT timer expires, or after PSCCH or PSSCH fails to decode, or after SCI or PSSCH information is received.
The terminal device of any of claims 30 to 40, wherein the DRX configuration is for a side-link between the first terminal and the second terminal.
A terminal device as claimed in any of claims 30 to 41, wherein the DRX configuration is pre-configured or agreed upon, or the DRX configuration is network device configured, or the DRX configuration is second terminal configured.
A terminal device adapted for sidestream transmission between a first terminal and a second terminal, said terminal device being said second terminal, said terminal device comprising:

and the processing unit is used for maintaining the Discontinuous Reception (DRX) related timer or suspending or stopping the DRX related timer in the process of changing the synchronous source of the second terminal from the first synchronous source to the second synchronous source.
The terminal device of claim 43, wherein the second terminal maintains the DRX related timer during the synchronization source change,

the processing unit is further configured to determine a DRX activation time of the first terminal according to a synchronization compensation value and a DRX configuration between the second synchronization source and the first synchronization source.
The terminal device of claim 44, wherein the units of the synchronization compensation value include one of:

subframe, slot, symbol, millisecond.
The terminal device of claim 44 or 45,

the processing unit is further configured to determine, when the second terminal changes from the first synchronization source to the second synchronization source during operation of the first DRX timer, an operation time of the first DRX timer in a transmission resource pool for information transmission after the synchronization source is changed according to a sidestream DRX cycle, a sidestream DRX start offset, and a sidestream DRX slot offset; and/or the number of the groups of groups,

and when the second terminal changes from the first synchronous source to the second synchronous source during the operation of the second DRX timer, the processing unit is further used for determining the operation time of the second DRX timer in the transmission resource pool for information transmission after the synchronous source is changed according to the starting time and the operation time of the second DRX timer in the transmission resource pool for information transmission before the synchronous source is changed and the synchronous compensation value.
The terminal device according to any of the claims 44 to 46, wherein the first terminal is in a DRX-active state, the terminal device further comprising: a communication unit, wherein,

the communication unit is configured to perform information transmission on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.
The terminal device of claim 43, wherein the processing unit is specifically configured to:

in case the third condition is met, the DRX related timer is paused or stopped.
The terminal device of claim 48, wherein the third condition comprises at least one of:

when the second terminal sends first information;

after the second terminal sends the first information;

after the second terminal sends the first information for a fifth time period;

the second terminal sends the first information and receives the second information;

the second terminal sends the first information and receives the second information;

after the second terminal sends the first information and receives the second information for a sixth time period;

wherein the first information is used for indicating that the synchronization source is changed to a synchronization source of a target type, and the second information comprises positive feedback for the first information.
The terminal device of claim 49, wherein the first information includes at least information of a synchronization source of the target type.
The terminal device of claim 49 or 50,

after the first information is sent, the second terminal enters a DRX activation state, or the second terminal enters a state of being capable of receiving data.
The terminal device according to any one of claims 49 to 51,

the communication unit is further configured to retransmit the first information in case no positive feedback for the first information is received.
The terminal device of any one of claim 48 to 52,

in case the fourth condition is met, the processing unit is further configured to continue the DRX-related timer that was previously suspended or stopped, or the processing unit is further configured to restart the DRX-related timer, or the second terminal may send information to the first terminal within a target duration.
The terminal device of claim 53, wherein the fourth condition comprises at least one of:

when the second terminal sends third information;

After the second terminal sends the third information;

after the second terminal sends the third information for a seventh time period;

after the second terminal sends the third information and receives the fourth information;

the second terminal sends third information and receives fourth information;

after the second terminal sends the third information and receives the eighth time length of the fourth information;

the third information is synchronization confirmation information, and the fourth information is synchronization confirmation response information.
The terminal device of claim 43, wherein the second terminal pauses or stops the DRX related timer during the synchronization source change, the terminal device further comprising: a communication unit, wherein,

after the synchronization source of the second terminal is changed from the first synchronization source to the second synchronization source, and the first terminal is in a DRX active state, the communication unit is configured to send fifth information to the first terminal on one or more transmission resource pools supporting the second synchronization source according to a DRX configuration.
The terminal device of claim 55, wherein the fifth information comprises at least one of:

data information, synchronization information, discovery information, PC5-S information.
The terminal device of any of claims 44 to 47, 55 to 56, wherein the DRX configuration is for a side-link between the first terminal and a second terminal.
A terminal device as claimed in any of claims 44 to 47, 55 to 57, wherein the DRX configuration is pre-configured or protocol agreed, or wherein the DRX configuration is network device configured, or wherein the DRX configuration is first terminal configured.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory, to perform the method according to any of claims 1 to 13, or to perform the method according to any of claims 14 to 29.
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 13 or to perform the method of any one of claims 14 to 29.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 13 or to perform the method of any one of claims 14 to 29.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 13 or to perform the method of any one of claims 14 to 29.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 13 or to perform the method according to any one of claims 14 to 29.