CN111556590A - Side link discontinuous receiving method - Google Patents

Abstract

The present invention provides a side link discontinuous reception method, which solves the problem that the existing method is not suitable for the side link communication discontinuous reception mechanism. The side link discontinuous reception configuration parameter is used to make the terminal in the side link communication periodically in the active or inactive state of the discontinuous reception mechanism, and includes at least one of the following parameters: the side link discontinuous reception time parameter, Side link discontinuous reception timer, the start time of the end of the active state of the side link communication; the side link discontinuous reception time parameter is used to indicate the cycle length of the discontinuous reception mechanism, the start time of the active state and the active duration; The side link discontinuous reception timer is used to indicate the duration of the active state when the terminal of the side link communication is in the active state; The time to enter the inactive state after the data interaction ends. The present invention implements the use of a discontinuous reception mechanism in side link communications.

Description

A Method for Discontinuous Reception of Side Links

technical field

The present invention relates to the technical field of mobile communication, and in particular, to a method for discontinuous reception of a side link.

Background technique

In the existing system, a discontinuous reception (Discontinuous Reception, DRX) solution is applied between the base station and the terminal. After the terminal is configured with DRX, it can discontinuously monitor the PDCCH sent by the base station, so as to achieve the purpose of energy saving. The specific basic method of DRX is that the base station configures the DRX function and related parameters for the terminal (UE). According to the DRX configuration, the UE is in the active state of listening to the PDCCH (Physical downlink control channel, physical downlink control channel) and not listening to the PDCCH. Inactive "Inactive" two states. The existing DRX mechanism is used for the communication between the terminal and the base station, and is not suitable for the communication between the terminal and the terminal under the side link, and there is no corresponding solution for the discontinuous reception method under the side link.

SUMMARY OF THE INVENTION

The present invention provides a side link discontinuous reception method, which solves the problem that the existing method is not suitable for the side link communication discontinuous reception mechanism.

In order to solve the above-mentioned problems, the present invention is realized as follows:

A side link discontinuous reception method, the side link discontinuous reception configuration parameter is used to make the terminal in the side link communication periodically in the active state or the inactive state of the discontinuous reception mechanism, at least one of the following is included Parameters: side link discontinuous reception time parameter, side link discontinuous reception timer, side link communication activation state end start time; the side link discontinuous reception time parameter is used to indicate the duration of the discontinuous reception mechanism. Period length, activation state start time and activation duration; the side link discontinuous reception timer is used to indicate the duration of the active state when the terminal of the side link communication performs side link communication; the side link The start time of the end of the active state of the channel communication is the time when the terminal enters the inactive state after the data exchange ends in the side link communication.

Preferably, the link discontinuous reception time parameter includes a side link discontinuous reception period length, a side link discontinuous reception period start time offset parameter, a side link discontinuous reception activation start time offset parameter and the parameter of the active duration of the side link discontinuous reception; the start time of the active state of the side link discontinuous reception is the first start time plus the offset parameter of the start time of the side link discontinuous reception activation; the The first start time is determined by the length of the side link discontinuous reception period and the side link discontinuous reception period start time offset parameters according to the first setting condition.

Preferably, the side link discontinuous reception timer is one or more of the following timers: side link sending UE continuous activation timer, side link receiving UE continuous activation timer, side link receiving HARQ timer timer, side link receiving HARQ retransmission timer, side link sending HARQ timer, side link sending HARQ retransmission timer; When the UE satisfies the second set condition, it starts or restarts, and the sending UE is in the active state of the discontinuous reception mechanism during the start time period of the timer; the side link receiving UE continuously activates the timer, and the side link communication receiving The UE starts when it receives the PSCCH indicating new transmission and or retransmission, and the receiving UE is in the active state of the discontinuous reception mechanism during the starting time period of the timer. If the receiving UE receives the indication SL within the starting time period of the timer For the newly transmitted and or retransmitted PSCCH, restart the continuous activation timer of the side link receiving UE; the side link receiving HARQ timer, the receiving UE of the side link communication performs data reception detection in a HARQ process , start after corresponding HARQ feedback; the side link receiving HARQ retransmission timer is started when the side link receiving HARQ timer times out and the third setting condition is satisfied, and the timer starts at the time of starting the timer. In the segment, the receiving UE is in the active state of the discontinuous reception mechanism; the side link sending HARQ timer is started after the sending UE of the side link communication sends the corresponding UCI according to the SFCI received in a HARQ process; the The side link sending HARQ retransmission timer is started when the side link sending HARQ timer expires and the fourth set condition is satisfied, and the sending UE is in the discontinuous reception mechanism activation during the timer start time period state.

Preferably, if the side link discontinuous reception configuration parameter is a cell-level public configuration parameter, the terminal in side link communication is simultaneously in the discontinuous reception mechanism active state or the discontinuous reception mechanism inactive state.

Preferably, the side link discontinuous reception configuration parameters are configured at carrier level, resource pool level or priority level.

Preferably, the side link discontinuous reception configuration parameters are public configuration parameters or terminal-specific configuration parameters. If the terminal obtains both the public side link discontinuous reception configuration parameters and the terminal-specific side link discontinuous reception configuration parameters, When the activation condition of the DRX configuration parameter of the common side link and the activation condition of the DRX configuration parameter of the dedicated side link of the terminal are satisfied, the terminal is in the active state of the DRX mechanism.

Further, the terminal-specific cellular link discontinuous reception configuration parameter is used to make the terminal of Uu communication in the active state or inactive state of the discontinuous reception mechanism; when the terminal-specific cellular link discontinuous reception is configured at the same time. The configuration parameters and the side link discontinuous reception configuration parameters, if the terminal activates the corresponding discontinuous reception mechanism according to one of the configuration parameters, the other discontinuous reception mechanism is also in the active state.

Further, the side link discontinuous reception configuration parameters of the same group of terminals are the same.

Further, if the terminal-specific cellular link discontinuous reception timer and the side link discontinuous reception timer are configured at the same time, in the side link communication based on the base station scheduling, the side link discontinuous reception timer is configured. The reception timer multiplexes the terminal-specific cellular link discontinuous reception timer.

Further, the start time of the end of the active state of the side link communication of the sending terminal or the receiving terminal in the side link communication is modified so that the two are the same.

Further, if the side link discontinuous reception time parameter includes a short SL DRX cycle time parameter and a long SLDRX cycle time parameter, the terminal in side link communication first experiences M corresponding to the short SL DRX cycle time parameter. The active state or inactive state of the discontinuous reception mechanism, and then enter the listening active state or the listening inactive state of the discontinuous reception mechanism corresponding to the long SL DRX cycle time period, M is an integer greater than or equal to 1.

Preferably, the first setting condition is: [(system frame number×10)+subframe number]modulo (the side link discontinuous reception cycle length)=the cycle start time offset parameter.

Preferably, the second setting condition is: the sending terminal listens to the scheduling information indicating new transmission or retransmission of the side link, or the sending terminal listens to the scheduling information indicating the new transmission or retransmission of the side link after set time.

Further, the side link discontinuous reception method, used for a sending terminal of side link communication, includes the following steps: acquiring the side link discontinuous reception configuration parameters; according to the side link discontinuous reception configuration parameter, after listening to the scheduling information indicating the SL transmission, send the PSCCH and the corresponding PSSCH to the receiving terminal, and enter the corresponding active or inactive state after the side link communication ends.

Preferably, if the side link discontinuous reception configuration parameter includes a side link sending UE continuous activation timer, the timer is started under the second setting condition; if the side link transmission enables the side link HARQ transmission feedback mechanism, the corresponding HARQ feedback information is detected on the PSFCH associated with the transmitted PSSCH; if the side link discontinuous reception configuration parameter includes the side link transmission HARQ timer, and the side link transmission is enabled The sending terminal reports the HARQ feedback mechanism corresponding to the PSSCH to the base station, reports the HARQ information corresponding to the PSSCH transmission scheduled by the scheduling information on the resources indicated by the base station, and starts the side link sending HARQ timer after reporting; The link discontinuous reception configuration parameters include the side link sending HARQ timer and the side link sending HARQ retransmission timer, and the side link transmission enables the sending terminal to report the HARQ feedback mechanism of the corresponding PSSCH to the base station, then in all The side link sending HARQ timer expires, and the side link sending HARQ retransmission timer is started when the fourth set condition is satisfied.

Preferably, the time to enter the corresponding inactive state after the side link communication ends is: synchronously entering the listening inactive state after the side link communication according to the side link discontinuous reception timer of the receiving terminal.

Further, the side link discontinuous reception method, used for a receiving terminal of side link communication, includes the following steps: acquiring the side link discontinuous reception configuration parameter; according to the side link discontinuous reception configuration parameter, listen to the PSCCH sent by the sending terminal in the active state of discontinuous reception and detect the corresponding PSSCH, and enter the corresponding active or inactive state after the end of the side link communication.

Preferably, if the side link discontinuous reception configuration parameter includes a side link receiving UE continuous activation timer, the timer is started when PSCCH is detected in the listening active state; if the side link discontinuous reception The reception configuration parameters include the side link reception HARQ timer, and the side link HARQ transmission feedback mechanism is enabled for side link transmission, then the corresponding HARQ feedback information is sent on the PSFCH associated with the received PSSCH, and after the transmission Start the side link reception HARQ timer; if the side link discontinuous reception configuration parameters include the side link reception HARQ timer and the side link reception HARQ retransmission timer, and the side link transmission is enabled In the HARQ transmission feedback mechanism of the side link, when the side link receiving HARQ timer expires and the third setting condition is satisfied, the side link receiving HARQ retransmission timer is started.

The beneficial effects of the present invention include: the present invention provides a side link discontinuous reception method, and by configuring the parameters of the side link discontinuous reception, the SL (side The active and inactive states of the link) communication can synchronize the active and inactive states between the transmitting UE and the receiving UE in the side link communication, ensuring the correct transmission and feedback of SL data under SL DRX.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is a kind of existing DRX mechanism embodiment;

FIG. 2(a) is a flow of a method for transmitting a terminal according to an embodiment of a method for discontinuous reception of a side link;

FIG. 2(b) is a process flow of a receiving terminal method according to an embodiment of a side link discontinuous receiving method;

Figure 2(c) is a communication process of an embodiment of a side link discontinuous reception method;

FIG. 3(a) is a method flow of a sending terminal according to an embodiment of a method for discontinuous reception of a side link indicated by a timer at the receiving end;

FIG. 3(b) is a communication process of an embodiment of a side link discontinuous reception method indicated by a terminal timer;

FIG. 4 is an embodiment in which the configuration parameters of the side link discontinuous reception are public configuration parameters at the cell level;

FIG. 5 is an embodiment of the start time for the end of the active state of the side link communication.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The innovation of the present invention is as follows: the present invention creatively configures SL DRX configuration parameters for the DRX mechanism under side link communication, and regulates the activation and In the inactive state, the relevant DRX timer of SL communication is specified, which ensures the correct transmission and feedback of side link data under SL DRX.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1:

FIG. 1 is an embodiment of an existing DRX mechanism, which is used for communication between a base station and a terminal.

When the terminal is in the active state, if it hears the PDCCH sent by the base station, it starts a continuous activation timer (drx-inactivityTimer), and the timer will restart each time it receives a PDCCH indicating a new transmission. For downlink transmission, the terminal starts a HARQ downlink timer (drx-HARQ-RTT-TimerDL) corresponding to the downlink HARQ process after making HARQ (Hybrid Automatic Repeat Request) feedback for the downlink data. The timer After the timeout, if the data in the process is not successfully decoded, the downlink retransmission timer (drx-RetransmissionTimerDL) is started. For uplink transmission, the terminal starts a HARQ uplink timer (drx-HARQ-RTT-TimerUL) corresponding to the uplink HARQ process after sending uplink data, and starts an uplink retransmission timer (drx-RetransmissionTimerUL) after the timer expires. The terminal is in an active state in states such as an activation timer, a downlink retransmission timer, and an uplink retransmission timer. After the corresponding timer expires, if the short discontinuous reception cycle (Short DRXcycle) is configured, it will enter the periodic active and inactive state according to the Short DRX cycle configuration, and after a certain number of short discontinuous reception cycles, enter the long discontinuous reception cycle. The discontinuous reception cycle (Long DRX cycle) enters the periodic active and inactive states according to the configuration of the Long DRX cycle.

The first embodiment of the present invention provides an existing DRX mechanism, which is used for the communication between the base station and the terminal, and is not suitable for the communication between the terminal and the terminal under the side link. For the discontinuous reception under the side link The method does not have a corresponding solution.

Second embodiment:

Fig. 2(a) is a flow chart of a method of sending a terminal according to an embodiment of a method for discontinuous reception of a side link, which can be used for a sending terminal of a discontinuous reception mechanism of side link communication. As the second embodiment of the present invention, a side link The discontinuous reception method includes the following steps:

Step 101: Obtain the side link discontinuous reception (SL DRX) configuration parameters.

In step 101, the side link discontinuous reception configuration parameter is used to make the terminal in the side link communication periodically in the active state or the inactive state of the discontinuous reception mechanism, and at least one of the following parameters is included: Discontinuous reception time parameter, side link discontinuous reception timer, and end start time of side link communication activation state; the side link discontinuous reception time parameter is used to indicate the cycle length and activation state of the discontinuous reception mechanism start time and activation duration; the side link discontinuous reception timer is used to indicate the duration that the terminal of the side link communication is in the active state when performing the SL communication; the end of the active state of the side link communication The start time is the time when the terminal enters the inactive state after the end of the data exchange in the side link communication.

In step 101, the side link discontinuous reception time parameter is used to indicate the periodic activation or inactivation state of the side link discontinuous reception mechanism, and the side link discontinuous reception timer is started during SL communication , after startup, the terminal used for side link communication is in the periodic active or inactive state indicated by the discontinuous reception time parameter of the side link before the terminal exits, and returns to the previous discontinuous side link until the SL communication ends. The periodic active or inactive state indicated by the reception time parameter, and the active or inactive state of the SL DRX mechanism during the exit period is indicated by the side link discontinuous reception timer.

It should be noted that the active state of the side link discontinuous reception mechanism described in the text means that the terminal will listen to SL-related scheduling information in the active state; the inactive state of the side link discontinuous reception mechanism means that the terminal does not listen to SL-related scheduling information. scheduling information. The SL-related scheduling information may be monitoring scheduling information about SLs sent by other terminals and/or base stations.

In step 101, the side link discontinuous reception time parameter includes the side link discontinuous reception period length, the side link discontinuous reception period start time offset parameter, the side link discontinuous reception activation start time offset shift parameter and side link DRX activation duration parameter; the start time of the side link DRX activation state is the first start time plus the side link DRX activation start time offset parameter ; The first start time is determined by the length of the side link discontinuous reception period and the side link discontinuous reception period start time offset parameter according to the first setting condition.

In step 101, the SL DRX configuration parameter defines the SL DRX cycle and the activation duration of the SL communication in one SL DRX cycle, and the SL DRX configuration parameter indicates the SL DRX cycle length and the SL DRX activation start time and active duration in one SL DRX cycle.

Specifically, the SL DRX cycle parameter (drx-LongCycleStartOffset-SL): this parameter further indicates the SL DRX cycle length (drx-LongCycle-SL) and the SL DRX cycle start time offset parameter (drx-StartOffset-SL) SL), the first start time t0 that satisfies the first set condition can be determined.

For example, if it is currently in a DRX cycle, the first setting condition is: [(system frame number × 10) + subframe number] modulo (the length of the side link discontinuous reception cycle) = the start of the cycle time offset parameter, the first start time t0 is the start time of the subframe that satisfies the above conditions. It should be noted that modulo is a modulo operator.

It should be noted that, the first setting condition may be a condition in the embodiment of the present invention, or may be other conditions, which are not particularly limited here.

Specifically, the SL DRX activation start time offset parameter (drx-SlotOffset-SL): this parameter determines the SL activation start time in an SL DRX cycle in combination with the SL DRX cycle parameter, that is, the side link discontinuous reception activation state The start time is t0+drx-SlotOffset-SL.

Specifically, the SLDRX activation duration parameter (drx-onDurationTimer-SL): This parameter indicates the duration of the terminal SL communication activation within a DRX cycle length (drx-LongCycle-SL). Within drx-onDurationTimer-SL, if it is not activated Other timers that prolong the activation time of the side link are switched to the inactive state after the end of drx-onDurationTimer-SL. When the terminal is in the active state of the side link according to the SL DRX parameter, it will listen to the PSCCH (Physical sidelink control channel, physical sidelink control channel). side link control channel).

In step 101, optionally, the SL DRX configuration parameter is a cell-level public configuration parameter, and the terminal may be in the active and inactive state of SL communication synchronously according to the public SL DRX configuration parameter.

Optionally, configure common SL DRX parameters, which are applied to multicast communication and/or broadcast communication modes of SL communication. That is, the SL communication terminal has synchronous active and inactive states for multicast and/or broadcast services, so that the receiving terminal can be in the active state synchronously to receive the data of the transmitting terminal.

Optionally, the SL DRX configuration parameters, such as the SL DRX cycle parameter, the SL DRX offset parameter, and the SL DRX activation duration parameter can be configured as carrier or BWP level, or resource pool level, or priority level: if configured as Carrier or BWP level, that is, each carrier or BWP corresponds to the above DRX parameter configuration; if it is configured as a resource pool level, that is, each resource pool corresponds to the above DRX parameter configuration; if it is configured as a priority level, that is, each priority corresponds to There are the above DRX parameter configurations. Therefore, if the SL DRX is at the carrier level/BWP/resource pool level, the corresponding SL active state listens to the SL related scheduling information on the corresponding carrier level/BWP/resource pool, and the corresponding SL inactive state is not listening to the corresponding carrier SL-related scheduling information on the level/BWP/resource pool.

Optionally, the side link discontinuous reception configuration parameters are public configuration parameters or terminal-specific configuration parameters, and the terminal can obtain terminal-specific SL DRX configuration parameters and public SL DRX configuration parameters at the same time. It is in the active state or inactive state of SL communication under the configuration parameters, and it is in the active state or inactive state of SL communication under the SL DRX configuration parameters dedicated to the terminal. When the activation conditions under the public SL DRX configuration parameters and the activation conditions under the terminal-specific SL DRX configuration parameters are met at a moment, the terminal is in the side link activation state and will listen to the PSCCH.

Optionally, the terminal-specific cellular link discontinuous reception (Uu DRX) configuration parameter is used to make the terminal of Uu communication in the active state or inactive state of the discontinuous reception mechanism, when the terminal-specific cellular link is configured at the same time. The link discontinuous reception configuration parameter and the side link discontinuous reception configuration parameter, if the terminal makes the corresponding discontinuous reception mechanism in the listening active state according to one of the configuration parameters, the other discontinuous reception mechanism is also in the active state. Listen for active status.

Specifically, the terminal can obtain the DRX (UuDRX) configuration parameters of the UE-specific cellular link for communication between the terminal and the base station, and use it to listen to the PDCCH sent by the base station, and the terminal is periodically in Uu communication according to the terminal-specific Uu DRX configuration parameters. active and inactive states. Optionally, when the terminal is in the active state of Uu communication according to the terminal-specific Uu DRX parameter, the terminal SL communication is in the active state, or when the terminal is in the active state of SL communication according to the SL DRX parameter, the terminal Uu communication is in the active state.

Optionally, if the terminal is only configured with SL DRX configuration parameters, according to the SL DRX configuration parameters, when the terminal is in the SL communication active state, it is also in the Uu communication active state, and will listen to the PDCCH sent by the base station.

Optionally, group UEs, and configure the same common SL DRX configuration parameters for a group of UEs, that is, UEs in the same group can be in the active and inactive states of SL communication synchronously according to the common SL DRX configuration parameters; UEs may have different SL DRX configuration parameters, that is, different groups of UEs may be in SL communication active and inactive states asynchronously. Optionally, the UE grouping may be grouped according to the identity of the UE, or the grouping may be performed by priority or the like.

In step 101, the sidelink discontinuous reception (SL DRX) timer is one or more of the following timers: sidelink sending UE continuous activation timer (drx-InactivityTimer-SLT), sidelink Channel receiving UE continuous activation timer (drx-InactivityTimer-SLR), side link receiving HARQ timer (drx-HARQ-RTT-Timer-SLR), side link receiving HARQ retransmission timer (drx-RetransmissionTimer-SLR) , a side link sending HARQ timer (drx-HARQ-RTT-Timer-SLT), and a side link sending HARQ retransmission timer (drx-RetransmissionTimer-SLT).

Specifically, the side link sends the UE continuous activation timer, that is, the first timer. When the sending terminal satisfies the second setting condition of the continuous SL communication activation state, the timer is started, and the terminal is in the period of time. The "Active" state is the active state of the SL DRX mechanism.

Optionally, the second setting condition may be that the sending terminal senses scheduling information (which may be PDCCH or PDSCH) indicating new SL transmission and or retransmission, or may be that the sending terminal senses a message indicating SL new transmission. After the scheduling information, after a preset period of time, etc., the timer restarts the timer after detecting that the second set condition is satisfied each time. It should be noted that the preset period of time may be indicated in the scheduling information indicating new SL transmission and or retransmission, or indicated in the SL DRX related configuration information (the SL DRX configuration parameter).

The side link receiving UE continuously activates the timer, that is, the second timer. When the receiving terminal receives a PSCCH (Physical sidelink share channel, physical sidelink share channel) indicating new transmission and retransmission, the timer is started. , the terminal is in the "Active" state within this time period, and restarts the timer when a new PSCCH indicating new transmission or retransmission is received within this time period.

The side link receives the HARQ timer, that is, the third timer: when the receiving terminal performs data reception detection on a HARQ process, starts the timer after making corresponding HARQ feedback, that is, sends SFCI (Sidelink Feedback Control Information, side link The timer is started after the channel feedback control information).

The side link receiving HARQ retransmission timer, that is, the fourth timer: when the side link receiving HARQ timer expires and the third setting condition is satisfied, the timer is started, and the terminal is in the period of time. "Active" state.

It should be noted that, the third setting condition may be set to expect a retransmission corresponding to incorrect data detection in the HARQ process, or may be set to other conditions, which are not particularly limited here.

The side link sending HARQ timer, that is, the fifth timer: when the sending terminal sends the corresponding UCI (Uplink Control Information, uplink control information) according to the SFCI received in a HARQ process, the timer is started.

The side link sending HARQ retransmission timer, that is, the sixth timer: when the side link sending HARQ timer expires and the fourth setting condition is satisfied, the timer is started, and the terminal is within this time period. in the "Active" state.

It should be noted that the fourth setting condition may be set to expect the base station to schedule retransmission resources for incorrect transmission of HARQ process data, and the fourth setting condition may also be set to other conditions, which are not particularly limited here. .

Optionally, the first timer and the second timer may be the same and have the same configuration parameter.

Optionally, the SL DRX timer may be configured as a common parameter, that is, any one or more of the first to sixth timers may be configured as a common parameter; the SL DRX timer may be applied to a group broadcast and or broadcast communication scenarios.

Optionally, the SL DRX timer can be configured as a carrier or BWP level, or a resource pool level, or a priority level: if it is configured as a carrier or BWP level, that is, each carrier or BWP corresponds to the above-mentioned DRX timer configuration. ; If the configuration is at the resource pool level, that is, each resource pool corresponds to the above DRX timer configuration; if it is configured as a priority level, that is, each priority corresponds to the above DRX timer configuration.

Optionally, group UEs, and configure the same common SL DRX timer for a group of UEs, that is, UEs in the same group use a common SL DRX timer, and different groups of UEs may configure different common SL DRX timers.

Optionally, the terminal can acquire the terminal-specific SL DRX timer and the public SL DRX timer at the same time, and select to use the terminal-specific SL DRX timer or the public SL DRX timer according to a specific SL communication scenario. For example, for multicast and or broadcast communications, corresponding common SL DRX timers may be employed.

Optionally, the terminal is configured with a UE-specific cellular link DRX timer (UuDRX timer) and an SL DRX timer for communication with the base station at the same time, and the terminal listens to the PDCCH based on the UE-specific UuDRX configuration parameters and sets the relevant UuDRX. timer. Correspondingly, in SL communication based on base station scheduling, the SL DRX timer may multiplex the Uu DRX timer. For example, the first timer multiplexes an inactivity timer (drx-inactivityTimer), the fifth timer multiplexes a HARQ downlink timer (drx-HARQ-RTT-TimerDL), and the sixth timer multiplexes The downlink retransmission timer (drx-RetransmissionTimerDL), that is, when the UE feeds back the HARQ information of the SL to the base station, starts the HARQ downlink timer, and starts the downlink retransmission timer when the timer expires and the UE wants to obtain the retransmission for the HARQ.

In step 101, the SL DRX configuration parameter specifies the start time for the end of the active state of the SL communication after the end of the SL communication of the terminal.

Specifically, according to the sidelink discontinuous reception time parameter and the sidelink discontinuous reception timer of the SL DRX configuration parameter, when the SL is sent, the UE can know the timer that the receiving UE is in the active state (for example, the The SL DRX timer is configured as a public property), including the second, third and fourth timers. After the data exchange between the SL ends, the sending UE and the receiving UE enter from the SL communication activation state after the SL communication. The inactive state time may be inconsistent, and the end start time of the active state of the side link communication of the transmitting terminal or the receiving terminal in the side link communication is modified so that the two are the same. It should be noted that the end start time of the sidelink communication activation state of the sending terminal or only the receiving terminal can be modified, or both can be modified at the same time, which is not particularly limited here.

In step 101, if the side link discontinuous reception time parameter includes a short SL DRX cycle time parameter and a long SL DRX cycle time parameter, the terminal in the side link communication first experiences M times of the short SL DRX cycle time The active state or inactive state of the DRX mechanism corresponding to the parameter, and then enter the active state or inactive state of the DRX mechanism corresponding to the long SL DRX cycle time parameter, M is an integer greater than or equal to 1.

Specifically, if a terminal is configured with a short SL DRX cycle and a long SL DRX cycle, after SL communication enters an inactive state, it first experiences M (M is an integer greater than or equal to 1) short SL DRX cycles. Assuming that the short SL DRX cycle parameters include the short DRX cycle length (drx-ShortCycle-SL), before entering the short SL DRX cycle, determine the start time T0 of entering the short SL DRX cycle according to the fifth setting condition of the SL DRX. The fixed condition is: [(system frame number×10)+subframe number]modulo(drx-ShortCycle-SL)=drx-StartOffset-SL, the terminal is in the cycle start time offset parameter (drx-StartOffset-SL) after the Active state in a short SL DRX cycle.

After M short SL DRX cycles, the long SL DRX cycle is entered, and the length of the DRX cycle used in the long SL DRX cycle is the cycle length (drx-LongCycle-SL), where the parameters M and drx-ShortCycle-SL can be common or UE-specific SL DRX configuration parameters.

It should be noted that the long SL DRX cycle time parameter is the aforementioned side link discontinuous reception time parameter, and the specific configuration of the long SL DRX cycle time parameter will not be described repeatedly here.

It should also be noted that the fifth setting condition may also be other conditions, which are not particularly limited here.

It should also be noted that the manner in which the terminal obtains the configuration parameters of the side link discontinuous reception (SL DRX) may be sent by the base station or other terminal equipment, or written in the equipment by the terminal according to the agreement.

It should also be noted that the SL DRX function corresponding to the side link discontinuous reception (SL DRX) configuration parameter can be configured to be enabled (enable) or disabled (disable), for example, when the SL DRX configuration parameter on a resource pool is disabled. , the terminal continues to be in the active state of SL communication on the resource pool until SL DRX is enabled.

Step 102, according to the side link discontinuous reception configuration parameter, after listening to the scheduling information indicating SL transmission, send the PSCCH and the corresponding PSSCH to the receiving terminal, and enter the corresponding activation or activation after the side link communication ends. inactive state.

In step 102, if the side link discontinuous reception configuration parameter includes a side link sending UE continuous activation timer, the timer is started under the second setting condition; if the side link transmission enables the side chain If the HARQ transmission feedback mechanism of the channel is adopted, the corresponding HARQ feedback information is detected on the PSFCH associated with the transmitted PSSCH; if the side link discontinuous reception configuration parameter includes the side link transmission HARQ timer, and the side link transmission enables If the sending terminal can report the HARQ feedback mechanism corresponding to the PSSCH to the base station, the HARQ information corresponding to the PSSCH transmission scheduled by the scheduling information is reported on the resources indicated by the base station, and the side link transmission HARQ timer is started after the reporting; The configuration parameters of the side link discontinuous reception include the side link sending HARQ timer and the side link sending HARQ retransmission timer, and the side link transmission enables the sending terminal to report the HARQ feedback mechanism of the corresponding PSSCH to the base station, then The side link sending HARQ retransmission timer is started when the side link sending HARQ timer times out and the fourth setting condition is satisfied, for example, the side link sending HARQ timer times out and the HARQ process data is not available. When successful transmission requires the base station to reschedule resources, start the HARQ retransmission timer for the side link transmission.

In step 102, the sending terminal starts the relevant timer configured for the sending terminal during side link communication, and exits the active state or inactive state indicated by the side link discontinuous reception time parameter at this time, and the sending terminal is in the relevant The active state indicated by the timer; after the end of the side link communication, if there is no other indication information, the sending terminal restores the corresponding active state or inactive state when it exits.

In step 102, the SL sending UE enters the SL active or inactive state according to the SL DRX configuration parameter after the SL communication is completed, and the SL DRX configuration parameter includes the relevant parameters for the sending UE to enter the active state. exposition. It should be noted that the sending UE may enter an active state or an inactive state after the SL communication ends.

In step 102, the SL sending UE enters the SL inactive state according to the DRX configuration after the SL communication is completed. If the short SL DRX cycle time parameter and the long SL DRX cycle time parameter are both configured for the sending UE, the inactive state can be changed first Enter the short SL DRX cycle and then enter the long SL DRX cycle, or directly enter the long SL DRX cycle.

Preferably, the time when the sending UE enters the active state after the SL communication is completed can be synchronized with the receiving UE. It should be noted that the end or completion of the SL communication may indicate that no new data or retransmission data is sent to the receiving UE for the sending UE, or the relevant timer in the active state of the SL communication expires.

Further, the sending terminal may also receive an instruction from other terminals (eg, the receiving UE) and/or the base station to enter the SL DRX inactive state.

FIG. 2(b) is a method flow of a receiving terminal according to an embodiment of a side link discontinuous reception method, which can be used for a receiving terminal of a side link communication discontinuous reception mechanism, and specifically includes the following steps:

Step 201: Acquire the configuration parameters of the side link discontinuous reception.

The method of configuring the sidelink discontinuous reception configuration parameters for the receiving terminal in step 201 is the same as that for the transmitting terminal, and the description is not repeated here.

Step 202, according to the side link discontinuous reception configuration parameter, listen to the PSCCH sent by the sending terminal in the active state of discontinuous reception and detect the corresponding PSSCH, and enter the corresponding active or inactive state after the side link communication ends .

In step 202, if the side link discontinuous reception configuration parameter includes a side link reception UE continuous activation timer, start the timer when the PSCCH indicating the new transmission and or retransmission of the SL is heard in the listening active state. Timer; if the side link discontinuous reception configuration parameter includes the side link reception HARQ timer, and the side link transmission enables the HARQ transmission feedback mechanism of the side link, then the received PSSCH is associated with the PSFCH on the side link. Send the corresponding HARQ feedback information, and start the side link receiving HARQ timer after sending; if the side link discontinuous reception configuration parameters include the side link receiving HARQ timer and the side link receiving HARQ retransmission timer, and the HARQ transmission feedback mechanism of the side link is enabled for side link transmission, after the side link reception HARQ timer expires and the third set condition is satisfied, start the side link reception HARQ retransmission timer, for example, the side link reception HARQ retransmission timer is started when the side link reception HARQ timer expires and the HARQ process data is not successfully received and needs to be retransmitted by the sending terminal.

In step 202, the receiving terminal starts the relevant timer configured for the receiving terminal during side link communication, and exits the active state or inactive state indicated by the side link discontinuous reception time parameter at this time, and the receiving terminal is in the relevant The active state indicated by the timer; after the side link communication ends, if there is no other indication information, the receiving terminal restores the corresponding active state or inactive state when it exits.

In step 202, the SL receiving UE enters the SL inactive state according to the DRX configuration after the SL communication. If the short SL DRX cycle time parameter and the long SL DRX cycle time parameter are configured for the receiving UE at the same time, the inactive state can be entered first. The short SL DRX cycle then enters the long SL DRX cycle, or it can directly enter the long SL DRX cycle.

It should be noted that the end or completion of the SL communication may indicate that there is no new data or retransmission of SL scheduling data to be received by the receiving UE, and or the detection result of no SL transmission data needs to be HARQ feedback, and or is in an active state. The associated timer has expired.

Further, the receiving terminal may also receive instructions from other terminals (such as the sending UE) and/or the base station to enter the SL DRX inactive state.

Figure 2(c) is a communication process of an embodiment of a side link discontinuous reception method, which is a SL communication process under the scheduling of the base station. Specifically,

The SL DRX configuration parameters include the first to sixth timers,

For the SL sending UE, assuming that the second setting condition is that the terminal senses the PDCCH indicating the new transmission of the SL, the sending terminal starts the first timer when it senses the PDCCH of the base station scheduling the SL communication resources in the active state. . Assuming that the second setting condition is that a preset period of time elapses after the terminal senses the PDCCH indicating the new transmission of SL, in the active state, it starts the first preset period of time after listening to the PDCCH of the SL communication resource scheduled by the base station in the active state. a timer.

The sending terminal sends the PSCCH and the corresponding PSSCH to the receiving UE according to the scheduling information indication. If the HARQ transmission feedback mechanism of the SL is enabled in the current SL transmission, the sending UE detects the corresponding HARQ feedback information SFCI on the PSFCH associated with the transmitted PSSCH; if the current SL transmission enables the HARQ transmission feedback mechanism of the SL SL transmission enables the sending UE to report the HARQ feedback mechanism of the corresponding PSSCH to the base station, and the sending UE reports the HARQ information corresponding to the PSSCH transmission scheduled by the scheduling information on the resources indicated by the base station, and after reporting, starts the scheduling information scheduling The fifth timer of the HARQ process; after the fifth timer expires and the fourth set condition is met (for example, the terminal expects the base station to schedule retransmission resources for the incorrect transmission of the HARQ process data) described in Sixth timer.

For the SL receiving UE, in the active state, the SL sends the PSCCH sent by the UE, starts the second timer, and detects the corresponding PSSCH according to the PSCCH indication. If the current SL transmission enables the SL HARQ transmission feedback mechanism, the receiving UE Send the corresponding HARQ feedback information SFCI on the PSFCH associated with the received PSSCH, and start the third timer of the HARQ process corresponding to the PSSCH after the transmission; after the third timer expires, the third setting is satisfied The fourth timer is started when the conditions (for example, the terminal expects to send the UE to initiate retransmission for the HARQ process data is not transmitted correctly).

Further, the SL sending UE and the receiving UE enter the SL inactive state after the SL communication, and then enter the short SL DRX cycle and then the long SL DRX cycle from the inactive state, or directly enter the long SL DRX cycle.

Specifically, a terminal enters the inactive state after the SL communication ends, and will enter the SL DRX cycle according to the SL DRX configuration. It is assumed that the sending UE determines the start time T0_TX of entering the SL DRX cycle according to the first setting condition of the SL DRX. Obtain the SL DRX cycle length, and send the active state that the UE is in one SL DRX cycle in T0_TX+drx-StartOffset-SL (UE SL DRX configuration).

The embodiment of the present invention provides an SL DRX method, which clarifies the DRX mechanism of side link communication, can synchronize the activation and deactivation states between the transmitting UE and the receiving UE in the side link communication, and ensures the SL data. Correct transmission and feedback.

The third embodiment:

Fig. 3 (a) is a kind of sending terminal method process flow of the side link discontinuous reception method embodiment indicated by the end timer, a kind of side link discontinuous reception method, specifically comprises the following steps:

Step 301: Acquire the configuration parameters of the side link discontinuous reception.

In step 301, the sidelink discontinuous reception timer in the sidelink discontinuous reception configuration parameter is at least one of the following: the second timer, the third timer, and the fourth timer.

The method for obtaining the side link DRX configuration parameters in step 301 is discussed in detail in step 101, and the discussion is not repeated here.

Step 302, according to the side link discontinuous reception configuration parameters, after listening to the scheduling information indicating SL transmission, send the PSCCH and the corresponding PSSCH to the receiving terminal, and enter the corresponding activation or activation after the side link communication ends. inactive state.

In step 302, for the SL sending UE, assuming that the sixth setting condition is satisfied, it will continue to be in the active state of SL communication. The sixth setting condition is that when the sending UE monitors the scheduling information of the scheduling SL transmission in the active state, or when the sending UE monitors the scheduling information of the scheduling SL transmission in the state, a certain time elapses.

In step 302, the time to enter the corresponding active or inactive state after the SL communication according to the DRX configuration is as described in step 101, and the corresponding active time and inactive time of the SL communication are determined according to the DRX configuration.

In step 302, optionally, the sending UE synchronously enters the inactive state after the sidelink communication according to the sidelink discontinuous reception timer of the receiving terminal, that is, the sending terminal enters the inactive state at the same time as the receiving terminal .

In step 302, the SL sending UE enters the SL inactive state after the SL communication, and then enters the short SL DRX cycle and then the long SL DRX cycle from the inactive state, or directly enters the long SL DRX cycle.

Optionally, the sending terminal may also receive an instruction from other terminals (eg, the receiving UE) and/or the base station to enter the SL DRX inactive state.

Figure 3(b) is a communication process of an embodiment of a side link discontinuous reception method indicated by a timer at the receiving end. When the SLDRX configuration parameter includes at least the second to fourth timers, a method under scheduling by the base station The SL communication process is as follows:

For the SL sending UE, assuming that the sixth set condition is satisfied, it will continue to be in the active state of SL communication. The sixth setting condition is that when the sending UE monitors the scheduling information of the scheduling SL transmission in the active state, or when the sending UE monitors the scheduling information of the scheduling SL transmission in the state, a certain time elapses.

For the SL receiving UE, in the active state, it senses the PSCCH sent by the SL sending UE, starts the second timer, and detects the corresponding PSSCH according to the PSCCH indication. If the HARQ transmission feedback mechanism of SL is enabled for the current SL transmission, the receiving UE sends the corresponding HARQ feedback information SFCI on the PSFCH associated with the received PSSCH, and starts the third timer of the HARQ process corresponding to the PSSCH after the transmission . After the third timer expires, the fourth timer is started when the third set condition is satisfied (for example, the terminal expects to send the UE to initiate retransmission for incorrect transmission of the HARQ process data).

After the SL communication, the terminal enters the SL inactive state according to the DRX configuration, and then enters the short SLDRX cycle and then the long SL DRX cycle from the inactive state, or directly enters the long SL DRX cycle as described in step 101 . Optionally, the terminal may also receive an instruction from the base station or other terminals to enter the SL DRX inactive state.

In the third embodiment of the present invention, the way for the sending UE to enter the "Inactive" mode (inactive state) may not be limited to one of the following: 1) Entering the "Inactive" mode according to the SL DRX timer of the receiving UE, including: when When the sending UE monitors the scheduling information for scheduling SL transmission in the active state, it continues to be in the active state, and synchronously enters the inactive state after the SL communication according to the SL DRX related timer of the receiving UE. 2) After the SL communication ends, the scheduling information indicating the new transmission of the SL is not received after waiting for a certain period of time.

It should be noted that, the sending UE entering the inactive state may be synchronized with the receiving UE, or may not be synchronized, and whether synchronization can be configured in advance.

In the third embodiment of the present invention, the discontinuous reception method of the receiving UE is the same as the discontinuous reception method of the receiving UE in the second embodiment, and the description is not repeated here.

In the third embodiment of the invention, after the side link communication ends, the transmitting terminal enters the active state or the inactive state according to the relevant timer of the receiving terminal. It should be noted that, regardless of whether the relevant timer is configured for the sending UE in the SL DRX configuration parameters, the sending terminal can enter the active state or the inactive state according to the relevant timer of the receiving terminal, and the sending terminal can enter the active state or the inactive state according to the relevant timer of the receiving terminal. Whether the device enters the active state or the inactive state may be indicated in the SL DRX configuration parameter or other indication information.

With the side link discontinuous reception method provided by the present invention, the sending UE and the receiving UE can effectively carry out SL communication, which ensures the correct transmission and feedback of the SL data.

Fourth embodiment:

FIG. 4 shows an embodiment in which the configuration parameters of the side link discontinuous reception are common configuration parameters at the cell level.

In the fourth embodiment of the present invention, the SL DRX configuration parameter is a cell-level public configuration parameter, and the terminal can synchronize the active and inactive states of SL communication according to the public SL DRX configuration parameter.

Specifically, both the first terminal UE_1 and the second terminal UE_2 are configured with the same common SL DRX configuration parameters, so the start times when the first terminal and the second terminal enter the DRX mechanism listening active state are aligned , the start times of entering the listening inactive state are aligned, and the lengths of the DRX cycles of the first terminal and the second terminal are the same.

Fifth embodiment:

FIG. 5 is an embodiment of the end start time of the active state of the side link communication, which regulates the start time of the end of the active state of the side link communication after the SL communication ends.

Specifically, according to the SL DRX configuration parameter, when the SL sending UE can learn the timers that the receiving UE is in the active state (for example, configure the SL DRX timer as a public property), including the second to fourth timers, in After the data exchange between SLs ends, the time between the sending UE and the receiving UE from the SL communication active state to the inactive state after the SL communication may be inconsistent. It is assumed that the sending UE enters the inactive time (for example, the first timer on the sending UE side or The sixth timer timeout) is the sending timeout time (TimerOut_Tx), and it is assumed that the receiving UE enters the inactive time (for example, the second timer or the fourth timer on the receiving UE side times out) is the receiving timeout time (TimerOut_Rx), and the difference between TimerOut_Tx and TimerOut_Rx An offset (Offset), which can be positive or negative.

Optionally, the sending UE can extend the entry inactive time TimerOut_Tx by the above offset, that is, the sending UE can modify the entry inactive time to TimerOut_Tx+Offset, so that the sending UE and the receiving UE enter the inactive state synchronously.

It should be noted that the fifth embodiment of the present invention describes modifying the starting time of the end of the active state of the side link communication of the transmitting terminal, and the starting time of the end of the active state of the side link communication of the receiving terminal can also be modified, and the sending terminal can also be modified at the same time. The start time for the end of the active state of the side link communication between the terminal and the receiving terminal is not particularly limited here.

It should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also no Other elements expressly listed, or which are also inherent to such a process, method, article of manufacture or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

The above descriptions are merely embodiments of the present invention, and are not intended to limit the present invention. Various modifications and variations of the present invention are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims (18)

1. A side link discontinuous receiving method is characterized in that,

the side link discontinuous reception configuration parameter is used for enabling a terminal in side link communication to be in an activated state or an inactivated state of a discontinuous reception mechanism periodically, and at least comprises one of the following parameters: the method comprises the steps of side link discontinuous receiving time parameter, side link discontinuous receiving timer and side link communication activation state ending starting time;

the side link discontinuous reception time parameter is used for indicating the cycle length, the activation state starting time and the activation duration of a discontinuous reception mechanism;

the side link discontinuous reception timer is used for indicating the duration of the side link communication when the terminal of the side link communication is in the activated state;

and the starting time of the end of the side link communication activated state is the time when the terminal enters the non-activated state after the data interaction in the side link communication is finished.

2. The side-link discontinuous reception method according to claim 1, wherein the side-link discontinuous reception time parameter includes a side-link discontinuous reception cycle length, a side-link discontinuous reception cycle start time offset parameter, a side-link discontinuous reception activation start time offset parameter, and a side-link discontinuous reception activation duration parameter;

the starting time of the side link discontinuous reception activation state is the sum of the first starting time and the offset parameter of the side link discontinuous reception activation starting time;

and the first starting time is determined by the length of the side link discontinuous receiving period and the offset parameter of the starting time of the side link discontinuous receiving period according to a first set condition.

3. The side-link discontinuous reception method according to claim 1, wherein the side-link discontinuous reception timer is one or more of the following timers: the side link sending UE continuously activates the timer, the side link receiving HARQ retransmission timer, the side link sending HARQ timer and the side link sending HARQ retransmission timer;

the side link sending UE continuously activates the timer, starts or restarts when the sending UE of the side link communication meets a second set condition, and is in a discontinuous receiving mechanism activation state within the timer starting time period;

the side link receiving UE continuously activates the timer, the side link receiving UE is started when receiving UE communicated with the side link receives PSCCH indicating new transmission or retransmission, the receiving UE is in a discontinuous receiving mechanism activation state in the timer starting time period, and if the receiving UE receives PSCCH indicating SL new transmission or retransmission in the timer starting time period, the side link receiving UE continuously activates the timer;

the side link receiving HARQ timer is started after receiving UE communicated by the side link performs data receiving detection and corresponding HARQ feedback in one HARQ process;

the side link HARQ receiving retransmission timer is started when the side link HARQ receiving timer is overtime and meets a third set condition, and the receiving UE is in a discontinuous receiving mechanism activated state in the timer starting time period;

the side link transmission HARQ timer is started after the transmission UE of side link communication transmits corresponding UCI according to SFCI received in one HARQ process;

and the side link transmission HARQ retransmission timer is started when the side link transmission HARQ timer is overtime and meets a fourth set condition, and the transmitting UE is in a discontinuous reception mechanism activation state in the timer starting time period.

4. The side-link discontinuous reception method according to claim 1, wherein if the side-link discontinuous reception configuration parameter is a cell-level common configuration parameter, the terminal in side-link communication is simultaneously in a discontinuous reception mechanism activated state or a discontinuous receiver mechanism deactivated state.

5. The side-link discontinuous reception method of claim 1, wherein the side-link discontinuous reception configuration parameter is configured as a carrier level, a resource pool level, or a priority level.

6. The side-link discontinuous reception method according to claim 1, wherein the side-link discontinuous reception configuration parameter is a common configuration parameter or a terminal-specific configuration parameter, and if the terminal obtains the common side-link discontinuous reception configuration parameter and the terminal-specific side-link discontinuous reception configuration parameter at the same time, the terminal is in a discontinuous reception mechanism activated state when an activation condition of the common side-link discontinuous reception configuration parameter and/or an activation condition of the terminal-specific side-link discontinuous reception configuration parameter are satisfied.

7. The side-link discontinuous reception method of claim 1,

the dedicated cellular link discontinuous reception configuration parameter for the terminal is used for enabling the terminal of Uu communication to be in an activated state or an inactivated state of a discontinuous reception mechanism;

when the dedicated cellular link discontinuous reception configuration parameters and the side link discontinuous reception configuration parameters are configured at the same time, if the terminal enables the corresponding discontinuous reception mechanism to be in the activated state according to one configuration parameter, the other discontinuous reception mechanism is also in the activated state.

8. The side-link discontinuous reception method of claim 1, wherein the side-link discontinuous reception configuration parameters of the same group of terminals are the same.

9. The side-link discontinuous reception method of claim 1,

if the dedicated cellular link discontinuous reception timer for the terminal and the side link discontinuous reception timer are configured at the same time, the side link discontinuous reception timer multiplexes the dedicated cellular link discontinuous reception timer for the terminal in the side link communication based on the base station scheduling.

10. The side-link discontinuous reception method of claim 1, wherein the end start time of the side-link communication activation state of a transmitting terminal or a receiving terminal in side-link communication is modified to be the same.

11. The sidelink discontinuous reception method of claim 1, wherein if the sidelink discontinuous reception time parameter comprises a short SL DRX cycle time parameter and a long SL DRX cycle time parameter, a terminal in sidelink communication first goes through an active state or an inactive state of M discontinuous reception mechanisms corresponding to the short SL DRX cycle time parameter, and then enters the active state or the inactive state of the discontinuous reception mechanism corresponding to the long SL DRX cycle time parameter, where M is an integer greater than or equal to 1.

12. The side-link discontinuous reception method according to claim 2, wherein the first setting condition is: [ (sfn × 10) + subframe number ] module (the sidelink drx cycle length) ═ the cycle start time offset parameter.

13. The side-link discontinuous reception method according to claim 3, wherein the second setting condition is: the sending terminal monitors the scheduling information indicating the new transmission or retransmission of the side link or the preset time is passed after the sending terminal monitors the scheduling information indicating the new transmission or retransmission of the side link.

14. The side-link discontinuous reception method according to any of claims 1 to 13, used for a sending terminal of side-link communication, comprising the steps of:

acquiring the side link discontinuous reception configuration parameters;

and according to the side link discontinuous reception configuration parameters, after the scheduling information indicating SL transmission is monitored, sending the PSCCH and the corresponding PSSCH to the receiving terminal, and entering a corresponding activated or inactivated state after the side link communication is finished.

15. The side-link discontinuous reception method of claim 14,

if the side link discontinuous reception configuration parameters comprise side link sending UE (user equipment) continuously activating the timer, starting the timer under a second set condition;

if the side link transmission enables the HARQ transmission feedback mechanism of the side link, detecting corresponding HARQ feedback information on a PSFCH associated with the transmitted PSSCH;

if the side link discontinuous reception configuration parameters comprise a side link transmission HARQ timer and side link transmission enables a HARQ feedback mechanism that a transmission terminal reports corresponding PSSCH to a base station, reporting the HARQ information corresponding to PSSCH transmission scheduled by scheduling information on a resource indicated by the base station, and starting the side link transmission HARQ timer after reporting;

and if the side link discontinuous reception configuration parameters comprise a side link transmission HARQ timer and a side link transmission HARQ retransmission timer, and the side link transmission enables a transmission terminal to report a HARQ feedback mechanism of the corresponding PSSCH to the base station, starting the side link transmission HARQ timer when the side link transmission HARQ timer is overtime and a fourth set condition is met.

16. The side-link discontinuous reception method of claim 14, wherein the time for entering the corresponding inactive state after the side-link communication is finished is: and synchronously entering an interception non-activated state after the side link communication according to the side link discontinuous receiving timer of the receiving terminal.

17. The side-link discontinuous reception method according to claims 1 to 13, used for a receiving terminal of side-link communication, comprising the steps of:

acquiring the side link discontinuous reception configuration parameters;

and according to the side link discontinuous reception configuration parameters, monitoring the PSCCH sent by the sending terminal in the activation state of discontinuous reception, detecting the corresponding PSSCH, and entering the corresponding activation or non-activation state after the side link communication is finished.

18. The side-link discontinuous reception method of claim 17,

if the side link discontinuous reception configuration parameters comprise side link reception UE (user equipment) continuous activation timer, starting the timer when the PSCCH is monitored in a monitoring activation state;

if the side link discontinuous reception configuration parameters comprise a side link reception HARQ timer and side link transmission enables a side link HARQ transmission feedback mechanism, sending corresponding HARQ feedback information on a received PSFCH associated with PSSCH, and starting the side link reception HARQ timer after sending;

and if the side link discontinuous reception configuration parameters comprise a side link reception HARQ timer and a side link reception HARQ retransmission timer, and the side link transmission enables a side link HARQ transmission feedback mechanism, starting the side link reception HARQ retransmission timer when the side link reception HARQ timer is overtime and meets a third set condition.

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