Unicast sidelink communication method, apparatus, and terminal

Abstract

The application discloses a unicast sidelink communication method, device and terminal, and belongs to the technical field of communication. The unicast sidelink communication method comprises the following steps: a receiving end configured with a discontinuous reception (DRX) mode establishes a unicast sidelink with a sending end within a unicast establishment time; after the unicast sidelink is established, the receiving end receives a unicast service data packet by using target configuration information; wherein the target configuration information comprises parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service; and the unicast establishment time comprises one of the following: a duration corresponding to a first DRX; and a duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of communication, and particularly relates to a unicast sidelink communication method, device and terminal. BACKGROUND

[0002] The discontinuous reception (DRX) parameters of the direct communication interface (PC5) of the new radio (NR) sidelink (SL, also known as direct communication link, direct communication link, sidelink, etc.) unicast can be configured through the information interaction between user equipment (UE, also known as terminal) in the access stratum (AS) by different quality of service (QoS) profiles required by the service. That is, the receiving terminal (Receive UE or Peer UE, Rx UE, also known as receiving end) sends assistance information (Assistance Information) to the transmitting terminal (Transmit UE, Tx UE, also known as transmitting end), and the Tx UE determines the PC5 DRX of the unicast according to the information of the Rx UE and the QoS required by the service.

[0003] Generally, the Tx UE can configure the specific PC5 DRX parameters through the required QoS profile or PC5 QoS ID (PQI). The vehicle to everything (V2X) layer provides these information to the AS layer, and the AS layer negotiates through the information interaction between the UEs, considers the assistance information (Assistance Information) provided by the Rx UE, and combines the QoS profile information required by the service to determine the final PC5 DRX configuration. Therefore, the Tx UE can effectively configure the PC5 DRX parameters according to the nature / characteristics of its own service, while combining the assistance information provided by the Rx UE in the AS layer.

[0004] However, in the initial stage of the service, that is, before the unicast sidelink is established between the UEs, the Rx UE of the unicast cannot obtain the QoS profile information of the Tx UE, so the Rx UE can only realize the operation of the PC5 DRX through the pre-configured QoS profile information. In this way, the time consumption of the establishment of the unicast sidelink is long, and the configuration efficiency is low, which greatly reduces the energy saving effect of the UE. SUMMARY

[0005] The embodiment of the application provides a kind of unicast sidelink communication method, device and terminal, can solve the problem of low success rate and efficiency of information configuration caused by unicast link establishment process under existing mode.

[0006] In a first aspect, a unicast sidelink communication method is provided, comprising:

[0007] Within unicast establishment time, a receiving end configured with discontinuous reception (DRX) mode establishes a unicast sidelink with a transmitting end;

[0008] After the unicast sidelink is established, the receiving end receives unicast service data packets using target configuration information;

[0009] The target configuration information includes parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0010] The unicast establishment time includes one of the following:

[0011] A duration corresponding to a first DRX;

[0012] A duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0013] In a second aspect, a unicast sidelink communication device is provided, which is applied to a receiving end configured with discontinuous reception (DRX) mode, and includes:

[0014] A first establishment module is configured to establish a unicast sidelink with a transmitting end within unicast establishment time.

[0015] A receiving module is configured to receive unicast service data packets using target configuration information after the unicast sidelink is established.

[0016] The target configuration information includes parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0017] The unicast establishment time includes one of the following:

[0018] A duration corresponding to a first DRX;

[0019] A duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0020] In a third aspect, a unicast sidelink communication method is provided, comprising:

[0021] establish a unicast sidelink between the sending end and a receiving end configured with a discontinuous reception (DRX) mode within a unicast setup time;

[0022] after the unicast sidelink is established, the receiving end transmits unicast service data packets using target configuration information;

[0023] The target configuration information includes parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0024] The unicast setup time includes one of the following:

[0025] a duration corresponding to a first DRX;

[0026] a duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0027] In a fourth aspect, a unicast sidelink communication device is provided, which is applied to a sending end and includes:

[0028] a second establishment module configured to establish a unicast sidelink between the sending end and a receiving end configured with a discontinuous reception (DRX) mode within a unicast setup time;

[0029] a first sending module configured to transmit unicast service data packets using target configuration information after the unicast sidelink is established;

[0030] The target configuration information includes parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service. The unicast setup time includes one of the following:

[0031] a duration corresponding to a first DRX;

[0032] a duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0033] In a fifth aspect, a terminal is provided, which is a receiving end configured with a discontinuous reception (DRX) mode. The terminal includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, the steps of the method according to the first aspect are implemented.

[0034] In a sixth aspect, a terminal is provided, the terminal being a receiving terminal configured with a discontinuous reception (DRX) mode, comprising a processor and a communication interface, wherein the processor is configured to establish a unicast sidelink with a transmitting terminal within a unicast establishment time; and the communication interface is configured to receive unicast service data packets using target configuration information after the unicast sidelink is established.

[0035] The target configuration information comprises parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0036] The unicast establishment time comprises one of:

[0037] a duration corresponding to a first DRX;

[0038] a duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0039] In a seventh aspect, a terminal is provided, the terminal being a transmitting terminal, comprising a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method according to the third aspect.

[0040] In an eighth aspect, a terminal is provided, the terminal being a transmitting terminal, comprising a processor and a communication interface, wherein the processor is configured to establish a unicast sidelink with a receiving terminal configured with a discontinuous reception (DRX) mode within a unicast establishment time; and the communication interface is configured to transmit unicast service data packets using target configuration information after the unicast sidelink is established.

[0041] The target configuration information comprises parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0042] The unicast establishment time comprises one of:

[0043] a duration corresponding to a first DRX;

[0044] a duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0045] In a ninth aspect, a readable storage medium is provided, the readable storage medium storing a program or instructions, and the program or instructions, when executed by a processor, implement the steps of the method according to the first aspect or the steps of the method according to the third aspect.

[0046] In a tenth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is configured to run programs or instructions to implement steps of the method according to the first aspect or the third aspect.

[0047] In an eleventh aspect, a computer program / program product is provided, which is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement steps of the method according to the first aspect or the third aspect.

[0048] In the embodiments of the present application, the first DRX corresponding duration or the first DRX corresponding duration and the extension time after the first DRX corresponding duration which are used before the establishment of the unicast link are pre-configured, and the receiving end establishes the unicast link with the sending end, so as to improve the link establishment efficiency and save the terminal power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is a flowchart of a unicast sidelink communication method applied to a receiving end according to the embodiments of the present application;

[0050] Figure 2 is one of usage state diagrams of the Time Offset timer, the ITO timer and the STO timer;

[0051] Figure 3 is another of usage state diagrams of the Time Offset timer, the ITO timer and the STO timer;

[0052] Figure 4 is a unicast sidelink establishment process diagram;

[0053] Figure 5 is a state diagram of the Specific PC5 DRX, the Default PC5 DRX, the Time Offset timer, the ITO timer and the STO timer;

[0054] Figure 6 is one of usage state diagrams of the Time Offset timer and the STO timer;

[0055] Figure 7 is a usage process diagram of a data packet receiving timer;

[0056] Figure 8 is one of module diagrams of a unicast sidelink communication device according to the embodiments of the present application;

[0057] Figure 9 is a structural block diagram of a terminal according to the embodiments of the present application;

[0058] Figure 10 is a flowchart of a unicast sidelink communication method applied to a sending end according to an embodiment of the present application;

[0059] Figure 11 is a second module schematic diagram of a unicast sidelink communication device according to an embodiment of the present application;

[0060] Figure 12 is a structural block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0062] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by “first”, “second” are generally of a kind, and are not limited to the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims indicates at least one of the connected objects, and the character “ / ” generally indicates that the front and rear associated objects are in an “or” relationship.

[0063] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied outside the NR system application, such as in a 6th Generation (6G) communication system.

[0064] The unicast sidelink communication method, device and terminal provided by the embodiments of the present application will be described in detail below in combination with the drawings and some embodiments and their application scenarios.

[0065] As shown in Figure 1 The embodiments of the present application provide a unicast sidelink communication method, comprising:

[0066] Step 101: Within the unicast establishment active time, the receiving end configured with the discontinuous reception (DRX) mode establishes a unicast sidelink between the receiving end and the transmitting end;

[0067] It should be noted that when a service is performed between terminals, the party that transmits service data packets is referred to as a transmitting terminal (Tx UE, which can also be referred to as a transmitting end), and the party that receives service data packets is referred to as a receiving terminal (Rx UE, which can also be referred to as a receiving end).

[0068] It should be noted that the unicast establishment active time includes one of the following:

[0069] A11, the duration corresponding to the first DRX;

[0070] It should be noted that each DRX cycle includes on-Duration and Off-Duration, the receiving end and the sending end can transmit and receive data in the on-Duration, and do not transmit and receive data in the Off-Duration; in this case, the receiving end and the sending end communicate in the on-Duration to establish the unicast sidelink.

[0071] A12, the on-Duration corresponding to the first DRX and the extension time located after the on-Duration of the first DRX;

[0072] It should be noted that the extension time mentioned in this case refers to an additional time in which the Tx UE and the Rx UE can communicate after the on-Duration, which is similar to the on-Duration and can also be called time offset.

[0073] Step 102, after the unicast sidelink is established, the receiving end receives unicast service data packets by using target configuration information.

[0074] The target configuration information includes parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service.

[0075] It should be noted that the QoS configuration mentioned in the embodiments of the present application can be QoS Profile.

[0076] For step 102, after the unicast sidelink is established, the receiving end receives services by taking the on-Duration of the second DRX as DRX activation time; optionally, the target configuration information can further include parameter configuration information of the first DRX, that is, in this case, the receiving end combines the on-Duration of the first DRX and the on-Duration of the second DRX as DRX activation time to receive services.

[0077] First of all, it needs to be pointed out that, for PC5 DRX, it mainly includes: Default PC5 DRX and Specific PC5 DRX, of course, there are other types of DRX, and the first DRX in the embodiment of the application can refer to the Default PC5 DRX, and the second DRX can refer to the Specific PC5 DRX. Of course, the first DRX can also be a Sidelink DRX (SL DRX), a Specific PC5 DRX or other types of DRX, and the second DRX can also be a Default PC5 DRX, a SL DRX or other types of DRX, as long as the first DRX and the second DRX are not the same type of DRX.

[0078] In the embodiment of the application, the first DRX refers to the Default PC5 DRX, and the second DRX refers to the Specific PC5 DRX.

[0079] The process of unicast establishment in different unicast establishment time is described as follows.

[0080] I. The unicast establishment time includes the duration corresponding to the first DRX and the extension time located after the duration corresponding to the first DRX

[0081] Specifically, in this case, step 101 can be optionally implemented as:

[0082] In the unicast sidelink establishment process, the receiving end and the sending end transmit the first target information in the first duration corresponding to the first DRX, and transmit the second target information in the extension time located after the first duration.

[0083] The first target information at least includes a direct communication request (DCR) in a sidelink direct communication interface signaling (PC5-S), and the second target information includes information in the PC5-S and a sidelink direct communication interface radio resource control (PC5-RRC) except the first target information.

[0084] This implementation is similar to SL Inactivity Timer, which can extend the active time (Active Time) according to the DCR sending and receiving, and is used for unicast sidelink establishment.

[0085] It needs to be pointed out that the PC5-S mainly includes DCR, security mode completion (SMC) and direct communication confirmation (DCA).

[0086] In this implementation, at least the DCR is transmitted in the On-duration associated with the Default PC5 DRX. After the On-duration associated with the Default PC5 DRX, a Time Offset or an Extension Time can be used to complete the transmission other than the DCR.

[0087] Optionally, the length of the Extension Time satisfies one of the following:

[0088] A21, the length of the Extension Time is a preset value;

[0089] In this case, the length of the Extension Time is a fixed value configured or pre-configured.

[0090] It should be noted that in this case, the first duration refers to at least one duration corresponding to the first DRX. For example, if the Extension Time is set long enough, the first duration only corresponds to one duration of the Default PC5 DRX; if the Extension Time is set shorter, the PC5 sidelink establishment time is not enough, and multiple Default PC5 DRX On-durations must be used between unicast UEs to complete the PC5 unicast sidelink establishment, that is, the first duration needs to correspond to multiple durations of the Default PC5 DRX at this time.

[0091] This way of setting the Extension Time is relatively simple to implement and can save terminal power consumption.

[0092] A22, the length of the Extension Time is determined by channel conditions;

[0093] In this case, the length of the Extension Time is adaptive, that is, it changes with the good or bad of the channel conditions. The channel conditions can include: Channel occupancy Ratio (CR), Channel Busy Ratio (CBR), Signal-to-Noise Ratio (SNR), etc.

[0094] It should be noted that the Extension Time can be extended until the unicast sidelink establishment is completed, that is, the adaptive length of the Extension Time can be determined according to the actual situation. The adaptive length of the Extension Time can be stopped after the Tx UE receives the RRCReconfigurationCompleteSidelink information, and can be stopped after the Rx UE sends the RRCReconfigurationCompleteSidelink.

[0095] It should be noted that in this case, the first duration refers to a duration corresponding to the first DRX (i.e., Default PC5 DRX), and the extension time is located in the Off-Duration. In general, the Off-Duration of the first DRX is relatively long, and the length of the extension time is less than the length of the Off-Duration. That is, in this case, the establishment of the unicast sidelink can be completed within a period of the first DRX, the establishment of the unicast sidelink can be quickly realized, the establishment efficiency of the sidelink is improved, and the purpose of saving terminal power consumption is also achieved.

[0096] It should be further noted that in the embodiments of the present application, the receiving end uses an extension time timer to count the extension time, and the sending end also cooperates with the receiving end to use a corresponding timer to align the extension time. Alternatively, the receiving end and the sending end transmit the first target information in the first duration corresponding to the first DRX, and transmit the second target information in the extension time located after the first duration. The specific implementation manner is as follows:

[0097] In the case of satisfying the first condition, the receiving end starts the extension time timer;

[0098] The first condition includes at least one of the following:

[0099] A31, after receiving the DCR sent by the sending end;

[0100] It should be noted that in this case, the sending end starts the corresponding timer after sending the DCR.

[0101] A32, after sending the SMC signaling to the sending end;

[0102] It should be noted that in this case, the sending end starts the corresponding timer after receiving the SMC signaling.

[0103] A33, after receiving the SMC-ACK signaling fed back by the sending end;

[0104] It should be noted that in this case, the sending end starts the corresponding timer after sending the SMC-ACK signaling.

[0105] It should be further noted that after sending the sidelink radio resource configuration completion information, the receiving end stops the extension time timer, and the sending end also stops the corresponding timer.

[0106] The manner in which the receiving end and the sending end align the extension time is described in detail as follows.

[0107] For the transmitter, the transmitter divides the extended time counting into two stages, i.e., uses an Initial Time Offset (ITO) timer and a Secondary Time Offset (STO) timer respectively, and the STO timer is also called a first time timer in the embodiments of the present application; and the receiver only uses one extended time timer, which can be called a Time Offset timer.

[0108] Implementation manner one,

[0109] As shown in Figure 2 For the Tx UE, at time t1, the Tx UE starts the Initial Time Offset timer immediately after sending the DCR to the Rx UE, and the Rx UE starts the Time Offset timer immediately after receiving the DCR sent by the Tx UE; at time t2, the Tx UE stops the Initial Time Offset timer after receiving the SMC sent by the Rx UE, and then starts the Secondary Time Offset timer immediately.

[0110] It should be noted that the Tx UE does not send any DCR during the time when the Initial Time Offset timer is started.

[0111] The reason why the Tx UE divides the Time Offset counting into two stages is to ensure that the Secondary Time Offset timer of the Tx UE and the Time Offset timer of the Rx UE are started at the same time, and the extended active time of the transmission and reception is aligned.

[0112] In particular, the DCR is using the sidelink signaling radio bearer without protection, i.e. SL-SRB0 (using TM RLC mode, no signaling feedback acknowledgement mechanism), the possibility of Rx UE decoding failure for DCR is relatively high. If Rx UE decoding failure for DCR, Rx UE cannot start Time Offset timer, while Tx UE only starts Initial Time Offset timer to receive SMC, i.e. SL-SRB1 (using AM RLC mode, with signaling feedback acknowledgement mechanism), due to SL-SRB1 with signaling feedback acknowledgement mechanism, the possibility of Tx UE decoding failure for SMC is very low. After Initial Time Offset timer expires, if Tx UE does not receive SMC (generally this case is Rx UE decoding failure for DCR), Tx UE will send DCR again at the next Default PC5 DRX On-duration occasion. In addition, only when Tx UE receives SMC, Tx UE will stop Initial Time Offset timer, and start Secondary Time Offset timer.

[0113] It is worth noting that the actual start time of ITO timer and STO timer is equal to the actual start time of Time Offset timer, i.e. the length of ITO timer + the length of STO timer = the length of Time Offset timer, that is, the length of the extended time is equal to the sum of the length of the initial time offset timer and the length of the first time timer.

[0114] Implementation two,

[0115] As Figure 3 shown, Rx UE receives DCR sent by Tx UE, and successfully decodes DCR, Rx UE does not start Time Offset timer, Rx UE starts Time Offset timer after sending SMC. After receiving SMC, Tx UE stops Initial Time Offset timer, and then starts Secondary Time Offset timer. In this case, the actual start time of STO timer of Tx UE is equal to the actual start time of Time Offset timer of Rx UE, i.e. the length of STO timer = the length of Time Offset timer.

[0116] Rx UE uses this method to start the Time Offset timer can achieve more energy saving effect, because, in the ITO timer start period, the Tx UE is not to send DCR to the Rx UE.

[0117] It is worth noting that, as the Initial Time Offset timer expires within the On-duration of the Default PC5 DRX, the Tx UE does not need to wait for the next On-duration of the Default PC5 DRX, and the Tx UE can send the DCR to the Rx UE immediately after the end of the Initial Time Offset timer. However, the length of the On-duration of the Default PC5 DRX in this case is generally longer, and the energy saving effect on the UE will be greater.

[0118] Implementation mode three,

[0119] Rx UE receives the DCR sent by the Tx UE and successfully decodes the DCR, and the Rx UE does not start the Time Offset timer. The Rx UE starts the Time Offset timer after sending the SMC and receiving the SMC-ACK signaling sent by the Tx UE. In this case, the actual start time of the STO timer of the Tx UE is equal to the actual start time of the Time Offset timer of the Rx UE, that is, the length of the STO timer = the length of the Time Offset timer.

[0120] Rx UE uses this method to start the Time Offset timer can achieve more energy saving effect, because, in the ITO timer start period, the Tx UE is not to send DCR to the Rx UE.

[0121] Implementation mode four,

[0122] It should be noted that in this case, the Initial Time Offset timer can be started in the first time unit (for example, the time unit can be a time slot, a sub-time slot, etc.) after the end of the On-duration of the Default PC5 DRX.

[0123] It should be noted that if this method is used, the start of the Initial Time Offset timer will depend on whether the Tx UE receives the SMC from the Rx UE within the On-duration time. If the Tx UE does not receive the SMC within the On-duration time, the Tx UE will start the Initial Time Offset timer at the first time slot after the end of the On-duration. If the Tx UE receives the SMC within the On-duration time, the Tx UE and the Rx UE will start the Secondary Time Offset timer and the Time Offset timer, respectively. In this case, the Tx UE does not need to start the Initial Time Offset timer.

[0124] II. The unicast establishment time includes a duration corresponding to the first DRX

[0125] Specifically, in this case, step 101 can be optionally implemented as follows:

[0126] In the unicast sidelink establishment process, the receiving end and the sending end transmit PC5-S and PC5-RRC information within at least one duration corresponding to the first DRX.

[0127] It should be noted that this case means that before the Specific PC5 DRX configuration is completed, all PC5-S (including DCR, SMC and DCA) and PC5-RRC information will be transmitted in the duration (On-duration) associated with the Default PC5 DRX. This way can achieve the effect of terminal energy saving while being simple to implement.

[0128] The Tx UE needs to initiate unicast services, but the Tx UE also needs to stop unicast services. In order to stop unicast services, the embodiments of the present application adopt the following way:

[0129] In the case of meeting the second condition, the reception of the unicast service data packet is stopped;

[0130] The second condition includes at least one of the following:

[0131] B11. The receiving end receives first indication information sent by the sending end;

[0132] The first indication information is used to instruct the receiving end to stop using the second DRX;

[0133] Optionally, the receiving end receives first indication information sent by the sending end, including one of the following:

[0134] B111, the receiving end receives first indication information sent by the sending end through high-level signaling;

[0135] It should be noted that in this case, the sending of the first indication information is performed by using high-level information. The specific implementation process of this case is: once the Tx UE application layer stops the unicast service, the Tx UE notifies the Rx UE to stop using the Specific PC5 DRX through high-level signaling. In this case, the Rx UE stops the Specific PC5 DRX, but the Default PC5 DRX will continue to run.

[0136] B112, the receiving end receives first indication information sent by the sending end through a medium access control layer control element (MAC-CE) signaling;

[0137] It should be noted that in this case, the sending of the first indication information is performed by using MAC-CE signaling. The specific implementation process of this case is: once the Tx UE application layer stops the unicast service, the Tx UE notifies the Rx UE to stop using the Specific PC5 DRX through the MAC-CE signaling of the PC5 DRX. In this case, the Rx UE stops the Specific PC5 DRX, but the Default PC5 DRX will continue to run.

[0138] B12, the first timer expires;

[0139] It should be noted that the first timer is started (when the first timer is not started before, the first timer is started when a new data packet is received at the receiving end) or restarted (when the first timer has been started before, the first timer needs to be restarted (restarted) when a new data packet is received at the receiving end) in the case that the receiving end receives a new data packet.

[0140] The first timer in the embodiments of the present application is a data packet receiving timer. In this case, the receiving end uses the data packet receiving timer to stop the use of the Specific PC5 DRX configuration. The specific method is as follows: if the Rx UE receives a new data packet from the Tx UE, the Rx UE (re)starts the data packet receiving timer. More specifically, once the Rx UE receives a new data packet from the Tx UE, the data packet receiving timer will be (re)started at the first time slot after the PC5 DRX activation time. If the data packet receiving timer expires, it means that there is no data packet available for the application layer of this unicast service, and the Rx UE deactivates the Specific PC5 DRX, but the Default PC5 DRX will continue to run. The advantage of this scheme is that as long as the Tx UE stops sending new data packets, the Rx UE will stop using the Specific PC5 DRX configuration. Therefore, this method can guarantee the energy saving effect of the Rx UE.

[0141] Further, it needs to be further explained that this method can solve the problem of RLF (Radio Link Failure). Specifically, since the data packet receiving timer is always on at the transmitting and receiving ends, if RLF occurs, the Rx UE cannot receive data packets, and the Rx UE will consider that the unicast sidelink reception is stopped using the Specific PC5 DRX. After the Tx UE finishes sending data packets, it cannot receive feedback of the data packets, and the Tx UE will also stop using the Specific PC5 DRX. Therefore, if RLF occurs, the Tx UE and the Rx UE will recover the connection of the unicast sidelink through the Default PC5 DRX.

[0142] Further, it needs to be further explained that in the case where the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in the case where the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations, and preferably, the preset PDB is the smallest one of the PDBs in the at least two QoS configurations.

[0143] That is, the configuration of the parameters of the Specific PC5 DRX mainly depends on one QoS or a combination of multiple QoSs. When the configuration of the parameters of the Specific PC5 DRX depends on one QoS, the configuration of the parameters of the Specific PC5 DRX is determined according to the PDB size; when the configuration of the parameters of the Specific PC5 DRX depends on multiple QoSs, the configuration of the parameters of the Specific PC5 DRX is determined according to the smallest PDB size in the QoSs.

[0144] The following is an example of several application cases of the present application.

[0145] Specific application case one,

[0146] In the process of establishing a unicast sidelink, the establishment of the unicast sidelink can be performed according to the manner described in A11 or A12. When A12 is used, at least the DCR will be transmitted in the On-duration associated with the Default PC5 DRX. After the On-duration associated with the Default PC5 DRX, a Time Offset or an Extension Time can be used to complete the transmission other than the DCR.

[0147] Once the Tx UE application layer service starts, the Tx UE first needs to establish a unicast sidelink. As shown in FIG. 1, in the process of establishing a unicast sidelink, at time t1, the Tx UE sends a DCR to the Rx UE, at time t2, a PC5-S security channel is established, at time t8, the Tx UE completes the configuration of the PC5-RRC NORMAL parameters, and finally at time t12, the Tx UE completes the configuration of the parameters of the Specific PC5 DRX. The entire process of establishing a unicast sidelink is completed through the On-duration and the Time Offset of the Default PC5 DRX. Figure 4

[0148] It is worth noting that at time t9, the Tx UE can selectively configure the parameters of the Specific PC5 DRX for the Rx UE in advance before receiving the assistance information sent by the Rx UE. If the Rx UE does not accept the configuration of the parameters of the Specific PC5 DRX by the Tx UE, the Rx UE can send assistance information to request the Tx UE to reconfigure the parameters of the Specific PC5 DRX for it.

[0149] ​Optionally, before receiving the parameters of Specific PC5 DRX from Tx UE, at time t10, Rx UE can send assistance information first, and Tx UE can configure the parameters of Specific PC5 DRX for Rx UE at time t11 according to the received assistance information while considering the QoS requirement of the service.

[0150] According to the characteristics of the service (i.e. QoS requirement), Tx UE's V2X layer decides to use the corresponding Specific PC5 DRX, regardless of whether Rx UE starts Specific PC5 DRX or not, Default PC5 DRX is always running, so Tx UE will potentially use Default PC5 DRX and Specific PC5 DRX at the same time.

[0151] For example,

[0152] Optionally, as Figure 5 shown, Tx UE first sends DCR at time t1 in the On-duration of Specific PC5 DRX, and then Tx UE and Rx UE start Time Offset timer after the On-duration of Default PC5 DRX. In order to better align the Time Offset of Tx UE and Rx UE, Tx UE divides the Time Offset timer into two stages, i.e. at time t1, when Tx UE sends DCR, Tx UE starts Initial Time Offset (ITO) timer, and at time t2, when Tx UE receives SMC, Tx UE starts Secondary Time Offset (STO) timer; while Rx UE only uses one Time Offset timer, i.e. at time t1, when it receives DCR, it starts Time Offset timer.

[0153] Specifically, at time t2, Rx UE sends SMC, and after successfully receiving SMC, Tx UE stops Initial Time Offset timer and starts Secondary Time Offset timer.

[0154] During the Time Offset period, unicast UEs configure PC5-RRC NORMAL and Specific PC5 DRX using RRCReconfigurationSidelink. At time t12, after the Rx UE receives the parameter configuration information for the Specific PC5 DRX, it sends a configuration confirmation message to the Tx UE via RRCReconfigurationCompleteSidelink. Afterwards, unicast UEs can use the combined configuration of the Default PC5 DRX and Specific PC5 DRX to send and receive data packets. After time t12, if a data packet arrives at the AS layer for the Tx UE, the Tx UE can wait for time t13 of the nearest Specific PC5 DRX On-duration before sending the data packet.

[0155] Example 2

[0156] Optionally, the Initial Time Offset timer can be started in the first time slot after the on-duration of the Default PC5 DRX ends.

[0157] like Figure 3 As shown, the Tx UE first transmits the DCR at time t1 within the on-duration of the Specific PC5 DRX. The Tx UE starts the Initial Time Offset (ITO) timer in the first time slot after the on-duration of the Default PC5 DRX ends. At the extended time t2, the Rx UE transmits the SMC, and simultaneously starts its Time Offset timer. At time t2, after the Tx UE successfully receives the SMC, it stops the Initial Time Offset timer and starts the Secondary Time Offset timer.

[0158] It is worth noting that the process after starting the Time Offset timer and the Secondary Time Offset timer is the same as in Example 1.

[0159] Example 3

[0160] Optionally, the Tx UE transmits the DCR during the on-duration time and receives the SMC during the on-duration time.

[0161] In this case, such as Figure 6As shown, the Tx UE and the Rx UE start the Secondary Time Offset timer and the Time Offset timer, respectively, at the first time slot after the end of the On-duration of the Default PC5 DRX; in this case, the Tx UE does not need to start the Initial Time Offset timer.

[0162] It is worth noting that the procedures and examples after starting the Time Offset timer and the Secondary Time Offset timer are the same as those in Example 1.

[0163] Specific Application Case 2

[0164] When the Tx UE application layer stops the multicast service, B11 and B12 can be considered by the Rx UE. This application case mainly considers B12. In B12, the Rx UE stops using the Specific PC5 DRX by starting the data packet reception timer. The specific method is: if the Rx UE receives a new data packet from the Tx UE, the Rx UE will (re)start the data packet reception timer, and if the new data packet is the last data packet of the service, the Rx UE stops the Specific PC5 DRX after the data packet reception timer expires, and only retains the Default PC5 DRX configuration to receive data packets.

[0165] As shown in FIG. 13, at time t14, the last service data packet arrives at the Tx UE application layer. The Tx UE delivers the last service data packet to the AS layer through the V2X layer, and the MAC layer of the Tx UE sends the last service data packet at time t15. The Rx UE receives the data packet and restarts the data packet reception timer at time t16 (i.e., the first time slot after the On-duration); the Rx UE does not receive any new data packet during the running of the timer (i.e., the application layer has no data packet to send), and the data packet reception timer expires at time t17. The Rx UE stops the data packet reception timer at time t17 and stops using the Specific PC5 DRX configuration, but the Default PC5 DRX will continue to run. Figure 7

[0166] In summary, the embodiments of the present application can achieve the following beneficial effects:

[0167] ​The establishment process of the unicast sidelink is completed by using a relatively sparse default PC5 DRX configuration with a duration before the establishment of the unicast sidelink, and the transmission of the unicast data packet service is completed by using a specific PC5 DRX configuration associated with a unicast service QoS profile after the establishment of the unicast sidelink. This configuration method can enable the UE to be in a sleep state before the service starts, and the unicast sidelink establishment process can be quickly completed between unicast UEs as soon as the service starts.

[0168] It should be noted that the execution subject of the unicast sidelink communication method provided in the embodiments of the present application can be a unicast sidelink communication device, or a control module in the unicast sidelink communication device for executing the unicast sidelink communication method. In the embodiments of the present application, the unicast sidelink communication device is taken as an example to execute the unicast sidelink communication method, and the unicast sidelink communication device provided in the embodiments of the present application is described.

[0169] As shown in Figure 8 The embodiments of the present application provide a unicast sidelink communication device 800 applied to a receiving end configured in a discontinuous reception DRX mode, and the unicast sidelink communication device 800 comprises:

[0170] A first establishment module 801 is configured to establish a unicast sidelink with a sending end within a unicast establishment time.

[0171] A receiving module 802 is configured to receive a unicast service data packet by using target configuration information after the establishment of the unicast sidelink.

[0172] The target configuration information comprises second DRX parameter configuration information indicated by a quality of service QoS configuration of the unicast service.

[0173] The unicast establishment time comprises one of the following:

[0174] A duration corresponding to a first DRX;

[0175] The duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

[0176] Optionally, in the case where the unicast establishment time comprises the duration corresponding to the first DRX and the extension time located after the duration corresponding to the first DRX, the first establishment module 1201 is configured to:

[0177] During the unicast sidelink establishment process, the first target information is transmitted with the sending end in a first duration corresponding to a first DRX, and the second target information is transmitted with the sending end in an extension time located after the first duration.

[0178] The first target information at least includes a direct communication request DCR in a sidelink direct communication interface signaling PC5-S, and the second target information includes information in the PC5-S and sidelink direct communication interface radio resource control PC5-RRC information except the first target information.

[0179] Optionally, the length of the extension time meets one of the following:

[0180] The length of the extension time is a preset value.

[0181] The length of the extension time is determined by a channel condition.

[0182] Optionally, in the case where the length of the extension time is determined by the channel condition, the first establishing module 801 is configured to:

[0183] Start an extension time timer in the case where a first condition is met.

[0184] The first condition includes at least one of the following:

[0185] After receiving the DCR sent by the sending end;

[0186] After sending a security mode complete SMC signaling to the sending end;

[0187] After receiving a security mode complete acknowledgment SMC-ACK signaling fed back by the sending end.

[0188] Optionally, the first establishing module 801 is further configured to:

[0189] Stop the extension time timer after sending sidelink radio resource configuration complete information.

[0190] Optionally, in the case where the unicast establishment time includes a duration of a first DRX, the first establishing module 801 is configured to:

[0191] In the unicast sidelink establishment process, transmit the PC5-S and the PC5-RRC information with the sending end within at least one duration corresponding to the first DRX.

[0192] Optionally, after the unicast sidelink establishment is completed, the receiving module 802 further includes the following after receiving the unicast service data packet by using the target configuration information:

[0193] A stopping module configured to stop receiving the unicast service data packet in the case where a second condition is met.

[0194] The second condition includes at least one of the following:

[0195] The receiving end receives the first indication information sent by the sending end, and the first indication information is used to indicate the receiving end to stop using the second DRX;

[0196] The first timer is expired.

[0197] Optionally, the implementation manner of the receiving end receiving the first indication information sent by the sending end comprises one of the following:

[0198] The receiving end receives the first indication information sent by the sending end through high layer signaling;

[0199] The receiving end receives the first indication information sent by the sending end through media access control layer control element (MAC-CE) signaling.

[0200] Optionally, the first timer is started or restarted in the case that the receiving end receives a new data packet.

[0201] Optionally, the target configuration information further comprises parameter configuration information of the first DRX.

[0202] Optionally, in the case that the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in the case that the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

[0203] Optionally, the preset PDB is the smallest PDB in the at least two QoS configurations.

[0204] It should be noted that, by using the preset duration corresponding to the first DRX used before the establishment of the unicast link or the duration corresponding to the first DRX and the extension time after the duration corresponding to the first DRX, the receiving end establishes the unicast link with the sending end, thereby improving the link establishment efficiency and saving the terminal power consumption.

[0205] The unicast sidelink communication device in the embodiments of the present application can be a device, a device with an operating system, or an electronic device, and can also be a component in a terminal, an integrated circuit, or a chip. The device or electronic device can be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal can include, but is not limited to, the types of terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, and the like, and the embodiments of the present application are not limited specifically.

[0206] The unicast sidelink communication device provided by the embodiments of the present application can implement Figure 1 The method embodiments implement various processes and achieve the same technical effects, and to avoid repetition, details are not repeated here.

[0207] The embodiments of the present application also provide a terminal, which is a receiving end configured with a discontinuous reception (DRX) mode, and includes a processor and a communication interface. The processor is configured to establish a unicast sidelink with a sending end within a unicast establishment time. The communication interface is configured to receive a unicast service data packet using target configuration information after the unicast sidelink is established.

[0208] The target configuration information includes parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service.

[0209] The unicast establishment time includes one of the following:

[0210] A duration corresponding to a first DRX;

[0211] A duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

[0212] The terminal embodiment corresponds to the above-mentioned receiving end method embodiment, and each implementation process and implementation manner of the above-mentioned method embodiment can be applied to the terminal embodiment and achieve the same technical effects. Specifically, Figure 9 A hardware structure diagram of a terminal for implementing the embodiments of the present application.

[0213] The terminal 900 is a receiving end configured with a discontinuous reception (DRX) mode, and includes at least part of components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0214] Those skilled in the art can understand that the terminal 900 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 910 through a power management system, so that the power management system can realize the functions of managing charging, discharging, and power consumption management. Figure 9 The terminal structure shown in the figure does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the figure, or combine certain components, or different component arrangements, which are not described here.

[0215] It should be understood that in the embodiments of the present application, the input unit 904 can include a graphics processor (GPU) 9041 and a microphone 9042. The graphics processor 9041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 can include a display panel 9061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 can include two parts of a touch detection device and a touch controller. The other input devices 9072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, which are not described here.

[0216] In the embodiments of the present application, the radio frequency unit 901 receives the downlink data from the network side device and processes it by the processor 910; in addition, it sends the uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0217] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area can store an operating system, an application program or instruction required by at least one function (such as a sound playing function, an image playing function, etc.), etc. In addition, the memory 909 can include a high-speed random access memory, and can also include a non-volatile memory, which can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device.

[0218] The processor 910 can include one or more processing units; optionally, the processor 910 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface and an application program or instruction, etc., and the modem processor mainly processes wireless communication, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 910.

[0219] The processor 910 is configured to implement the following functions:

[0220] establish a unicast sidelink with the sending end within a unicast establishment time;

[0221] The radio frequency unit 901 is configured to implement the following functions:

[0222] After the unicast sidelink is established, the target configuration information is used to receive a unicast service data packet;

[0223] The target configuration information includes: parameter configuration information of a second DRX, wherein the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service;

[0224] The unicast establishment time includes one of the following:

[0225] a duration corresponding to the first DRX;

[0226] a duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

[0227] The terminal of the embodiment of the application receives the unicast link between the terminal and the sending terminal by using the duration corresponding to the first DRX used before the unicast link is established or the duration corresponding to the first DRX and the extension time after the duration corresponding to the first DRX, so as to improve the link establishment efficiency and save the terminal power consumption.

[0228] Optionally, in the case where the unicast establishment time includes the duration corresponding to the first DRX and the extension time after the duration corresponding to the first DRX, the processor 910 is configured to implement:

[0229] In the unicast sidelink establishment process, the first target information is transmitted in the first duration corresponding to the first DRX and the second target information is transmitted in the extension time after the first duration by the radio frequency unit 901 and the sending terminal.

[0230] The first target information at least includes the direct communication request DCR in the sidelink direct communication interface signaling PC5-S, and the second target information includes the information in the PC5-S and the sidelink direct communication interface radio resource control PC5-RRC information except the first target information.

[0231] Optionally, the length of the extension time satisfies one of the following:

[0232] The length of the extension time is a preset value.

[0233] The length of the extension time is determined by the channel condition.

[0234] Optionally, in the case where the length of the extension time is determined by the channel condition, the processor 910 is configured to implement:

[0235] In the case where the first condition is met, the receiving terminal starts the extension time timer.

[0236] The first condition includes at least one of the following:

[0237] After receiving the DCR sent by the sending terminal;

[0238] After sending the safety mode completion SMC signaling to the sending terminal;

[0239] After receiving the safety mode completion response SMC-ACK signaling fed back by the sending terminal.

[0240] Optionally, the processor 910 is further configured to implement:

[0241] After sending the sidelink radio resource configuration completion information, stop the extension time timer.

[0242] Optionally, in the case where the unicast establishment time comprises a duration corresponding to the first DRX, the processor 910 is configured to implement:

[0243] In the unicast sidelink establishment process, the radio frequency unit 901 transmits PC5-S and PC5-RRC information with the sending end in at least one duration corresponding to the first DRX.

[0244] Optionally, after the unicast sidelink establishment is completed and the radio frequency unit 901 receives unicast service data packets using the target configuration information, the processor 910 is further configured to implement:

[0245] In the case where the second condition is met, the reception of the unicast service data packets is stopped;

[0246] The second condition comprises at least one of the following:

[0247] The receiving end receives first indication information sent by the sending end, and the first indication information is used to instruct the receiving end to stop using the second DRX;

[0248] The first timer is timed out.

[0249] Optionally, the receiving end receives the first indication information sent by the sending end in the following manner:

[0250] The receiving end receives the first indication information sent by the sending end through high-layer signaling;

[0251] The receiving end receives the first indication information sent by the sending end through a medium access control layer control element (MAC-CE) signaling.

[0252] Optionally, in the case where the radio frequency unit 901 receives a new data packet, the first timer is started or restarted.

[0253] Optionally, the target configuration information further comprises parameter configuration information of the first DRX.

[0254] Optionally, in the case where the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in the case where the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

[0255] Optionally, the preset PDB is the smallest one of the PDBs in the at least two QoS configurations.

[0256] Preferably, the embodiment of the application further provides a terminal, which is a receiving terminal, comprising a processor, a memory, a program or instructions stored in the memory and executable in the processor, which, when executed by the processor, implements various processes of the embodiment of the unicast sidelink communication method and achieves the same technical effects. To avoid repetition, details are not described herein.

[0257] The embodiment of the application further provides a readable storage medium, which stores a program or instructions, which, when executed by a processor, implements various processes of the embodiment of the unicast sidelink communication method and achieves the same technical effects. To avoid repetition, details are not described herein. The computer readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0258] As shown in Figure 10 To cooperate with the receiving of the receiving terminal, the embodiment of the application further provides a unicast sidelink communication method, which is applied to a sending terminal and comprises the following steps:

[0259] Step 1001: In a unicast establishment time, the sending terminal establishes a unicast sidelink with a receiving terminal configured with a discontinuous reception (DRX) mode.

[0260] Step 1002: After the unicast sidelink is established, the receiving terminal transmits a unicast service data packet by using target configuration information.

[0261] The target configuration information comprises: parameter configuration information of a second DRX, which is indicated by quality of service (QoS) configuration of the unicast service; and the unicast establishment time comprises one of the following:

[0262] A duration corresponding to a first DRX;

[0263] The duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

[0264] Optionally, in the case where the unicast establishment time comprises the duration corresponding to the first DRX and the extension time located after the duration corresponding to the first DRX, the step of establishing the unicast sidelink between the sending terminal and the receiving terminal configured with the DRX mode in the unicast establishment time comprises:

[0265] In the unicast sidelink establishment process, the sending terminal and the receiving terminal transmit first target information in a first duration corresponding to a first DRX and transmit second target information in an extension time located after the first duration.

[0266] The first target information includes at least a direct communication request DCR in a sidelink direct communication interface signaling PC5-S, and the second target information includes information in the PC5-S and sidelink direct communication interface radio resource control PC5-RRC information except the first target information.

[0267] Optionally, the length of the extension time satisfies one of the following:

[0268] The length of the extension time is a preset value.

[0269] The length of the extension time is determined by a channel condition.

[0270] Optionally, in the case where the length of the extension time is determined by a channel condition, the sending end transmits first target information in a first duration corresponding to the first DRX and transmits second target information in the extension time after the first duration, including at least one of the following:

[0271] In the case where a third condition is satisfied, the sending end starts an initial time offset timer.

[0272] The third condition includes at least one of the following:

[0273] After sending a direct communication request DCR to the receiving end;

[0274] In the duration corresponding to the first DRX, the sending end does not receive the SMC sent by the receiving end, and the first time unit after the end of the duration corresponding to the first DRX arrives.

[0275] Optionally, in the case where the third condition is satisfied, after the sending end starts the initial time offset timer, it further includes:

[0276] In the case where a fourth condition is satisfied, the sending end starts a first time timer.

[0277] The fourth condition includes at least one of the following:

[0278] After the sending end receives the SMC signaling, the sending end stops the initial time offset timer.

[0279] In the duration corresponding to the first DRX, the sending end receives the SMC sent by the receiving end.

[0280] Optionally, in the case where the fourth condition is satisfied, after the sending end starts the first time timer, it further includes:

[0281] After receiving the sidelink wireless resource configuration completion information, the sending end stops the first time timer.

[0282] Optionally, the length of the extended time is equal to the sum of the length of the initial time offset timer and the length of the first time timer.

[0283] The length of the extended time is equal to the length of the first time timer.

[0284] Optionally, in the case that the unicast establishment time includes a duration corresponding to the first DRX, the establishment of the unicast sidelink between the sending end and the receiving end configured with the discontinuous reception DRX mode within the unicast establishment time includes:

[0285] In the unicast sidelink establishment process, PC5-S and PC5-RRC information are transmitted within at least one duration corresponding to the first DRX.

[0286] Optionally, after the unicast sidelink establishment is completed, the receiving end further includes the following after transmitting the unicast service data packet using the target configuration information:

[0287] The sending end sends first indication information to the receiving end.

[0288] The first indication information is used to instruct the receiving end to stop using the second DRX.

[0289] Optionally, the sending end sends first indication information to the receiving end, including at least one of the following:

[0290] The sending end sends the first indication information to the receiving end through high-layer signaling.

[0291] The sending end sends the first indication information to the receiving end through a medium access control layer control element (MAC-CE) signaling.

[0292] Optionally, the target configuration information further includes parameter configuration information of the first DRX.

[0293] Optionally, in the case that the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in the case that the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

[0294] Optionally, the preset PDB is the smallest one of the PDBs in the at least two QoS configurations.

[0295] It should be noted that all the descriptions about the sending end in the above embodiments are applicable to the embodiments of the unicast sidelink communication method applied to the sending end, and the same technical effects can be achieved, which will not be repeated here.

[0296] As shown in Figure 11 The embodiment of the application further provides a unicast sidelink communication device 1100 applied to a sending end, comprising:

[0297] A second establishing module 1101 is configured to establish a unicast sidelink between the sending end and a receiving end configured with a discontinuous reception (DRX) mode within a unicast establishment time.

[0298] A first sending module 1102 is configured to send a unicast service data packet by using target configuration information after the unicast sidelink is established.

[0299] The target configuration information includes parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service.

[0300] The first DRX corresponds to a duration.

[0301] The first DRX corresponds to a duration and an extension time after the duration.

[0302] Optionally, in the case where the unicast establishment time includes the duration corresponding to the first DRX and the extension time after the duration corresponding to the first DRX, the second establishing module 1501 is configured to:

[0303] During the unicast sidelink establishment process, the first target information is transmitted in the first duration corresponding to the first DRX, and the second target information is transmitted in the extension time after the first duration.

[0304] The first target information at least includes a direct communication request (DCR) in a sidelink direct communication interface signaling (PC5-S), and the second target information includes information in the PC5-S and a sidelink direct communication interface radio resource control (PC5-RRC) except the first target information.

[0305] Optionally, the length of the extension time satisfies one of the following conditions:

[0306] The length of the extension time is a preset value.

[0307] The length of the extension time is determined by a channel condition.

[0308] Optionally, in the case where the length of the extension time is determined by channel conditions, the second establishing module 1101 is configured to:

[0309] start an initial time offset timer in the case where a third condition is met;

[0310] The third condition includes at least one of the following:

[0311] after sending a direct communication request (DCR) to the receiving end;

[0312] In the case where the sending end does not receive the SMC sent by the receiving end within the duration corresponding to the first DRX, the first duration corresponding to the first DRX ends, and the first time unit arrives.

[0313] Optionally, in the case where the second establishing module 1101 starts the initial time offset timer in the case where the third condition is met, the second establishing module 1101 is further configured to:

[0314] start a first time timer in the case where a fourth condition is met;

[0315] The fourth condition includes at least one of the following:

[0316] The sending end stops the initial time offset timer after receiving the SMC signaling;

[0317] In the case where the sending end receives the SMC sent by the receiving end within the duration corresponding to the first DRX.

[0318] Optionally, in the case where the second establishing module 1101 starts the first time timer in the case where the fourth condition is met, the second establishing module 1101 is further configured to:

[0319] Stop the first time timer after receiving the sidelink radio resource configuration completion information.

[0320] Optionally, the length of the extension time is equal to the sum of the length of the initial time offset timer and the length of the first time timer; or

[0321] The length of the extension time is equal to the length of the first time timer.

[0322] Optionally, in the case where the unicast establishment time includes a duration corresponding to the first DRX, the second establishing module 1101 is configured to:

[0323] In the unicast sidelink establishment process, the PC5-S and PC5-RRC information are transmitted within at least one duration corresponding to the first DRX.

[0324] Optionally, after the first sending module 1102 sends the unicast service data packet by using the parameter configuration information of the first DRX and the parameter configuration information of the second DRX, the method further includes the following steps:

[0325] The second sending module is configured to send the first indication information to the receiving end.

[0326] The first indication information is used to instruct the receiving end to stop using the second DRX.

[0327] Optionally, the second sending module is configured to implement at least one of the following:

[0328] The sending end sends the first indication information to the receiving end through high-layer signaling.

[0329] The sending end sends the first indication information to the receiving end through a medium access control layer control element (MAC-CE) signaling.

[0330] Optionally, the target configuration information further includes the parameter configuration information of the first DRX.

[0331] Optionally, in a case where the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in a case where the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

[0332] Optionally, the preset PDB is the smallest one of the PDBs in the at least two QoS configurations.

[0333] It should be noted that the device embodiment is one-to-one corresponding to the above-mentioned method embodiment, and all implementation manners of the above-mentioned method embodiment are applicable to the device embodiment, and the same technical effects can also be achieved, and thus will not be described here.

[0334] Preferably, the embodiment of the application further provides a terminal, which is a sending end, including a processor, a memory, a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement each process of the unicast sidelink communication method embodiment applied to the sending end side, and the same technical effects can be achieved, to avoid repetition, which will not be described here.

[0335] The embodiment of the application further provides a readable storage medium, and the computer readable storage medium stores a program or instructions, the program or instructions being executed by the processor to implement each process of the unicast sidelink communication method embodiment applied to the sending end side, and the same technical effects can be achieved, to avoid repetition, which will not be described here.

[0336] The computer readable storage medium is, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, etc.

[0337] The embodiment of the application further provides a terminal, which is a sending terminal and comprises a processor and a communication interface. The processor is configured to establish a unicast sidelink with a receiving terminal configured with a discontinuous reception (DRX) mode within a unicast establishment time. The communication interface is configured to send a unicast service data packet by using target configuration information after the unicast sidelink is established.

[0338] The target configuration information comprises parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service. The unicast establishment time comprises one of the following:

[0339] a duration corresponding to a first DRX;

[0340] a duration corresponding to the first DRX and an extension time after the duration corresponding to the first DRX.

[0341] The terminal embodiment corresponds to the unicast sidelink communication method embodiment of the sending terminal side. Each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved.

[0342] Specifically, the embodiment of the application further provides a terminal, which is a sending terminal. Specifically, the structure of the sending terminal is similar to that of the receiving terminal shown in the sending terminal and will not be described here. Figure 9

[0343] Optionally, the processor is configured to implement:

[0344] establish a unicast sidelink with a receiving terminal configured with a discontinuous reception (DRX) mode within a unicast establishment time;

[0345] a radio frequency unit configured to send a unicast service data packet by using target configuration information after the unicast sidelink is established;

[0346] The target configuration information comprises parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by quality of service (QoS) configuration of the unicast service. The unicast establishment time comprises one of the following:

[0347] a duration corresponding to a first DRX;

[0348] ​A duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX.

[0349] Optionally, in the case where the unicast establishment time includes a duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX, the radio frequency unit is configured to:

[0350] In the unicast sidelink establishment process, the first target information is transmitted in a first duration corresponding to the first DRX, and the second target information is transmitted in an extension time located after the first duration.

[0351] The first target information at least includes a direct communication request DCR in a sidelink direct communication interface signaling PC5-S, and the second target information includes information other than the first target information in the PC5-S and a sidelink direct communication interface radio resource control PC5-RRC information.

[0352] Optionally, the length of the extension time satisfies one of the following:

[0353] The length of the extension time is a preset value.

[0354] The length of the extension time is determined by a channel condition.

[0355] Optionally, in the case where the length of the extension time is determined by a channel condition, the processor is configured to implement:

[0356] In the case where a third condition is met, an initial time offset timer is started.

[0357] The third condition includes at least one of the following:

[0358] After sending a direct communication request DCR to the receiving end;

[0359] In the duration corresponding to the first DRX, the sending end does not receive the SMC sent by the receiving end, and the first time unit after the end of the duration corresponding to the first DRX arrives.

[0360] Optionally, in the case where the third condition is met, after the processor starts the initial time offset timer, the processor is further configured to implement:

[0361] In the case where a fourth condition is met, a first time timer is started.

[0362] The fourth condition includes at least one of the following:

[0363] After receiving a security mode complete SMC signaling, the sending end stops the initial time offset timer.

[0364] In a duration corresponding to the first DRX, the transmitting end receives the SMC sent by the receiving end.

[0365] Optionally, after the processor starts the first time timer in the case where the fourth condition is met, the processor is further configured to implement:

[0366] After receiving the sidelink radio resource configuration completion information, the first time timer is stopped.

[0367] Optionally, the length of the extended time is equal to the sum of the length of the initial time offset timer and the length of the first time timer; or

[0368] The length of the extended time is equal to the length of the first time timer.

[0369] Optionally, in the case where the unicast establishment time includes a duration corresponding to the first DRX, the processor is configured to implement:

[0370] In the unicast sidelink establishment process, the PC5-S and PC5-RRC information are transmitted in at least one duration corresponding to the first DRX.

[0371] Optionally, after the radio frequency unit transmits the unicast service data packet using the target configuration information after the unicast sidelink establishment is completed, the radio frequency unit is further configured to implement:

[0372] The first indication information is sent to the receiving end;

[0373] The first indication information is used to instruct the receiving end to stop using the second DRX.

[0374] Optionally, the radio frequency unit is configured to implement at least one of the following:

[0375] The first indication information is sent to the receiving end through high-layer signaling;

[0376] The first indication information is sent to the receiving end through a medium access control layer control element (MAC-CE) signaling.

[0377] Optionally, the target configuration information further includes parameter configuration information of the first DRX.

[0378] Optionally, in the case where the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget (PDB); in the case where the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

[0379] Optionally, the preset PDB is the minimum PDB in the at least two QoS configurations.

[0380] It should be noted that the unicast sidelink communication device applied to the sending end and the receiving end in the embodiments of the present application can be arranged in the same device, that is, the device can realize both the information sending function and the information receiving function.

[0381] Optionally, as shown in Figure 12 The present application also provides a communication device 1200, which comprises a processor 1201, a memory 1202, a program or instruction stored in the memory 1202 and executable on the processor 1201. For example, when the communication device 1200 is a receiving end, the program or instruction is executed by the processor 1201 to realize each process of the above-mentioned unicast sidelink communication method applied to the receiving end, and achieve the same technical effects. When the communication device 1200 is a sending end, the program or instruction is executed by the processor 1201 to realize each process of the above-mentioned unicast sidelink communication method applied to the sending end, and achieve the same technical effects. To avoid repetition, details are not described here.

[0382] The terminal device can be a device that provides voice and / or data connectivity to a user, a hand-held device having a wireless connection function, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in the 5G system, the terminal device can be called user equipment (User Equipment, UE). The wireless terminal device can communicate with one or more core networks (Core Network, CN) through a radio access network (Radio Access Network, RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and other devices. The wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present application.

[0383] The network side device related by the embodiments of the present application can be a base station (BTS) in a Global System of Mobile communication (GSM) or a Code Division Multiple Access (CDMA), can be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), can be an evolved base station (eNB or eNodeB) in an LTE, or can be a relay station or an access point, or can be a base station in a future 5G network, and the like, and is not limited herein.

[0384] The network side device and the terminal can each use one or more antennas for Multi Input Multi Output (MIMO) transmission, and the MIMO transmission can be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). According to the shape and number of antenna combinations, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or can be diversity transmission or precoding transmission or beamforming transmission, and the like.

[0385] The embodiments of the present application further provide a chip, which comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions to realize each process of the above-mentioned unicast sidelink communication method or configuration method embodiments, and can achieve the same technical effects. To avoid repetition, it will not be repeated here.

[0386] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip chip, and the like.

[0387] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, either in a simultaneous fashion or in a fashion that is interleaved in time. For example, the described methods can be performed in a different order from that described, and / or various steps can be combined or omitted, and / or additional steps can be added, without departing from the scope of the present application. Also, features described with respect to certain examples can be combined in other examples.

[0388] From the above description of the embodiments, it is apparent that the above-described method of the embodiments can be realized by means of software and general-purpose hardware platforms, and of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such an understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) and includes a number of instructions for causing a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods described in the various embodiments of the present application.

[0389] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, rather than limiting, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A method of unicast sidelink communication, the method comprising: The application relates to a method for establishing a unicast sidelink between a receiving terminal and a sending terminal in a unicast establishment time, and receiving unicast service data packets by the receiving terminal after the unicast sidelink is established. The method comprises the following steps: establishing the unicast sidelink between the receiving terminal and the sending terminal in the unicast establishment time, wherein the receiving terminal is configured with a discontinuous reception (DRX) mode; receiving the unicast service data packets by the receiving terminal after the unicast sidelink is established, wherein the receiving terminal uses target configuration information; the target configuration information comprises second DRX parameter configuration information, and the second DRX parameter configuration information is indicated by quality of service (QoS) configuration of the unicast service; the unicast establishment time comprises: a first DRX corresponding duration and an extension time located after the first DRX corresponding duration; wherein the step of establishing the unicast sidelink between the receiving terminal and the sending terminal comprises: in a unicast sidelink establishment process, the receiving terminal and the sending terminal transmit first target information in a first duration corresponding to the first DRX, and transmit second target information in the extension time located after the first duration; 2. The method of claim 1, wherein, the first target information at least comprises a direct communication request (DCR) in a sidelink direct communication interface signaling (PC5-S), and the second target information comprises information in the PC5-S and a sidelink direct communication interface radio resource control (PC5-RRC) except the first target information. the length of the extension time satisfies one of the following conditions: the length of the extension time is a preset value; 3. The method of claim 1, wherein, the length of the extension time is determined by a channel condition. in the case that the length of the extension time is determined by the channel condition, the step of the receiving terminal and the sending terminal transmitting the first target information in the first duration corresponding to the first DRX, and transmitting the second target information in the extension time located after the first duration comprises: in the case that a first condition is met, the receiving terminal starts an extension time timer; the first condition comprises at least one of the following conditions: after receiving the DCR sent by the sending terminal; after sending a security mode complete (SMC) signaling to the sending terminal; 4. The method of claim 3, wherein, after receiving a security mode complete acknowledgement (SMC-ACK) signaling fed back by the sending terminal. the step of the receiving terminal and the sending terminal transmitting the first target information in the first duration corresponding to the first DRX, and transmitting the second target information in the extension time located after the first duration further comprises:

5. The method of claim 1, wherein, after sending a sidelink radio resource configuration complete information, the receiving terminal stops the extension time timer. after the receiving terminal receives the unicast service data packets by using the target configuration information, the method further comprises the following steps: in the case that a second condition is met, the receiving terminal stops receiving the unicast service data packets; the second condition comprises at least one of the following conditions: the receiving terminal receives first indication information sent by the sending terminal, and the first indication information is used for indicating that the receiving terminal stops using the second DRX; 6. The method of claim 5, wherein, a first timer is overdue. the receiving terminal receiving the first indication information sent by the sending terminal comprises one of the following conditions: the receiving terminal receives the first indication information sent by the sending terminal through high layer signaling; the receiving terminal receives the first indication information sent by the sending terminal through a medium access control (MAC) control element (CE) signaling.

7. The method of claim 6, wherein, The first timer is started or restarted in a case that a new data packet is received at the receiving end.

8. The method of claim 1, wherein, The target configuration information further comprises parameter configuration information of a second DRX.

9. The method of claim 1, wherein, In a case that the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by a packet delay budget PDB; in a case that the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by a preset PDB in the at least two QoS configurations.

10. The method of claim 9, wherein, The preset PDB is a smallest one of the PDBs in the at least two QoS configurations.

11. A method of unicast sidelink communication, the method comprising: Comprise: In a unicast establishment time, a sending end establishes a unicast sidelink between the sending end and a receiving end configured with a discontinuous reception DRX mode; After the unicast sidelink is established, the receiving end transmits a unicast service data packet by using target configuration information; The target configuration information comprises parameter configuration information of a second DRX, and the parameter configuration information of the second DRX is indicated by a quality of service QoS configuration of the unicast service. The unicast establishment time comprises: A duration corresponding to a first DRX and an extension time located after the duration corresponding to the first DRX; The unicast sidelink is established between the sending end and the receiving end in the unicast establishment time, comprising: In a unicast sidelink establishment process, the sending end and the receiving end transmit first target information in a first duration corresponding to a first DRX, and transmit second target information in an extension time located after the first duration; The first target information at least comprises a direct communication request DCR in a sidelink direct communication interface signaling PC5-S, and the second target information comprises information other than the first target information in the PC5-S and sidelink direct communication interface radio resource control PC5-RRC information.

12. The method of claim 11, wherein, The length of the extension time satisfies one of the following conditions: The length of the extension time is a preset value; The length of the extension time is determined by a channel condition.

13. The method of claim 11, wherein, In a case that the length of the extension time is determined by the channel condition, the sending end and the receiving end transmit the first target information in the first duration corresponding to the first DRX, and transmit the second target information in the extension time located after the first duration, comprising at least one of the following conditions: In a case that a third condition is satisfied, the sending end starts an initial time offset timer; The third condition comprises at least one of the following conditions: After a direct communication request DCR is sent to the receiving end; In the duration corresponding to the first DRX, the sending end does not receive an SMC sent by the receiving end, and a first time unit after the duration corresponding to the first DRX arrives.

14. The method of claim 13, wherein, In a case that the third condition is satisfied, after the sending end starts the initial time offset timer, the method further comprises: In a case that a fourth condition is satisfied, the sending end starts a first time timer; The fourth condition comprises at least one of the following conditions: The sending end stops the initial time offset timer after receiving the SMC signaling; The sending end receives the SMC sent by the receiving end within the duration corresponding to the first DRX.

15. The method of claim 14, wherein, In the case where the fourth condition is met, after the sending end starts the first time timer, the method further comprises: After receiving the sidelink radio resource configuration completion information, the sending end stops the first time timer.

16. The method of claim 14, wherein, The length of the extended time is equal to the sum of the length of the initial time offset timer and the length of the first time timer; or The length of the extended time is equal to the length of the first time timer.

17. The method of claim 11, wherein, After the unicast sidelink is established, the receiving end further comprises: The sending end sends first indication information to the receiving end; The first indication information is used to instruct the receiving end to stop using the second DRX.

18. The method of claim 17, wherein, The sending end sends the first indication information to the receiving end by at least one of the following manners: The sending end sends the first indication information to the receiving end by high layer signaling; The sending end sends the first indication information to the receiving end by MAC-CE signaling.

19. The method of claim 11, wherein, The target configuration information further comprises: parameter configuration information of the first DRX.

20. The method of claim 11, wherein, In the case where the parameter configuration information of the second DRX is indicated by one QoS configuration, the parameter configuration information of the second DRX is determined by PDB; in the case where the parameter configuration information of the second DRX is indicated by at least two QoS configurations, the parameter configuration information of the second DRX is determined by the preset PDB in the at least two QoS configurations.

21. The method of claim 20, wherein, The preset PDB is the smallest one of the PDBs in the at least two QoS configurations.

22. A device for unicast sidelink communication, applied to a receiving end configured with a discontinuous reception (DRX) mode, characterized in that, Comprise: A first establishing module, configured to establish a unicast sidelink with a sending end within a unicast establishment time; A receiving module, configured to receive unicast service data packets by using target configuration information after the unicast sidelink is established; The target configuration information comprises: parameter configuration information of a second DRX, which is indicated by a quality of service (QoS) configuration of the unicast service; The unicast establishment time comprises: A duration corresponding to a first DRX and an extended time located after the duration corresponding to the first DRX; The first establishing module is configured to: During the establishment of the unicast sidelink, the receiving end and the sending end transmit first target information in a first duration corresponding to a first DRX and transmit second target information in an extended time located after the first duration; The first target information at least comprises: a direct communication request (DCR) in a sidelink direct communication interface signaling (PC5-S), and the second target information comprises information in the PC5-S and sidelink direct communication interface radio resource control (PC5-RRC) information except the first target information.

23. The apparatus of claim 22, wherein, The receiving module, after the unicast sidelink is established, receives the unicast service data packet by using the parameter configuration information of the first DRX and the parameter configuration information of the second DRX, further comprises: A stopping module configured to stop receiving the unicast service data packet when a second condition is met. The second condition comprises at least one of the following: The receiving end receives the first indication information sent by the sending end, and the first indication information is used to instruct the receiving end to stop using the second DRX. The first timer is timed out.

24. A unicast sidelink communication apparatus applied to a transmitting end, characterized in that, Comprise: A second establishing module configured to establish a unicast sidelink between the receiving end configured with a discontinuous reception DRX mode within a unicast establishment time; A first sending module configured to send the unicast service data packet by using target configuration information after the unicast sidelink is established. The target configuration information comprises parameter configuration information of the second DRX, and the parameter configuration information of the second DRX is indicated by quality of service QoS configuration of the unicast service. The unicast establishment time comprises: A duration corresponding to the first DRX and an extension time located after the duration corresponding to the first DRX. The second establishing module is configured to: During the unicast sidelink establishment process, the sending end and the receiving end transmit first target information in a first duration corresponding to the first DRX and transmit second target information in an extension time located after the first duration.

25. The apparatus of claim 24, wherein, The first target information at least comprises a direct communication request DCR in a sidelink direct communication interface signaling PC5-S, and the second target information comprises information other than the first target information in the PC5-S and sidelink direct communication interface radio resource control PC5-RRC information. The first sending module, after the unicast sidelink is established, sends the unicast service data packet by using the target configuration information, further comprises: A second sending module configured to send first indication information to the receiving end.

26. A terminal, the terminal being a receiving end, characterized by The first indication information is used to instruct the receiving end to stop using the second DRX.

27. A terminal, the terminal being a transmitting end, characterized in that A processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the unicast sidelink communication method according to any one of claims 1 to 10.

28. A readable storage medium, characterized by, A processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the unicast sidelink communication method according to any one of claims 11 to 21. The readable storage medium stores the program or instructions, and the program or instructions are executed by the processor to implement the steps of the unicast sidelink communication method according to any one of claims 1 to 21.

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