CN111556590B - Side link discontinuous receiving method - Google Patents

Side link discontinuous receiving method Download PDF

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Publication number
CN111556590B
CN111556590B CN202010287055.0A CN202010287055A CN111556590B CN 111556590 B CN111556590 B CN 111556590B CN 202010287055 A CN202010287055 A CN 202010287055A CN 111556590 B CN111556590 B CN 111556590B
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side link
discontinuous reception
timer
link
terminal
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CN111556590A (en
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沈霞
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections

Abstract

The invention provides a side link discontinuous receiving method, which solves the problem that the existing method is not suitable for a side link communication discontinuous receiving mechanism. The side link discontinuous reception configuration parameter is used for enabling the terminal in side link communication to be in an activated or non-activated 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, a 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 the discontinuous reception mechanism; the side link discontinuous receiving 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; the end starting time of the side link communication activation state is the time when the terminal enters the non-activation state after the data interaction in the side link communication is finished. The invention realizes the use of a discontinuous reception mechanism in the side link communication.

Description

Side link discontinuous receiving method
Technical Field
The invention relates to the technical field of mobile communication, in particular to a side link discontinuous receiving method.
Background
In the existing system, a Discontinuous Reception (DRX) scheme is applied between a base station and a terminal, and after the terminal configures DRX, the terminal can discontinuously monitor a PDCCH sent by the base station, thereby achieving the purpose of saving energy. The basic method of the specific DRX is that a base station configures a DRX function and related parameters for a terminal (UE), and the UE is in two states, Active for intercepting a Physical Downlink Control Channel (PDCCH) and Inactive for not intercepting the PDCCH according to the DRX configuration. The existing DRX mechanism is used for communication between a terminal and a base station, is not suitable for communication between the terminal and the terminal under an edge link, and has no corresponding solution for a discontinuous receiving method under the edge link.
Disclosure of Invention
The invention provides a side link discontinuous receiving method, which solves the problem that the existing method is not suitable for a side link communication discontinuous receiving mechanism.
In order to solve the problems, the invention is realized as follows:
a side link discontinuous reception method, a side link discontinuous reception configuration parameter, is used for making a terminal in side link communication periodically in an active state or an inactive state of a discontinuous reception mechanism, and at least includes one of the following parameters: the method comprises the steps of side link discontinuous receiving time parameter, a 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.
Preferably, the 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.
Preferably, the side link discontinuous reception timer is one or more of the following timers: the side link sending UE continuously activates a timer, the side link receiving UE continuously activates the timer, a side link receiving HARQ retransmission timer, a side link sending HARQ timer and a 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.
Preferably, 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 system deactivated state.
Preferably, the edge link discontinuous reception configuration parameter is configured as a carrier level, a resource pool level or a priority level.
Preferably, the configuration parameter for discontinuous reception of the side link is a common configuration parameter or a configuration parameter dedicated to the terminal, and if the terminal obtains the configuration parameter for discontinuous reception of the common side link and the configuration parameter for discontinuous reception of the side link dedicated to the terminal at the same time, the terminal is in an activated state of a discontinuous reception mechanism when an activated condition of the configuration parameter for discontinuous reception of the common side link and/or an activated condition of the configuration parameter for discontinuous reception of the side link dedicated to the terminal are satisfied.
Further, 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.
Further, the edge link discontinuous reception configuration parameters of the same group of terminals are the same.
Further, 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 scheduled based on the base station.
Further, the end starting time of the side link communication activation state of the transmitting terminal or the receiving terminal in the side link communication is modified to make the two same.
Further, if the sidelink discontinuous reception time parameter includes a short SL DRX cycle time parameter and a long SL DRX cycle time parameter, the terminal in sidelink communication first goes through an active state or an inactive state of the discontinuous reception mechanism corresponding to M short SL DRX cycle time parameters, and then enters an active listening state or an inactive listening 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.
Preferably, the first setting condition is: [ (sfn × 10) + subframe number ] module (the sidelink drx cycle length) ═ the cycle start time offset parameter.
Preferably, the second setting condition is: and 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.
Further, the side link discontinuous receiving method is used for a sending terminal of side link communication, and comprises the following steps: 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.
Preferably, if the side-link discontinuous reception configuration parameter includes a side-link transmitting UE continuously activating a timer, starting the timer under a second setting 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.
Preferably, the time for entering the corresponding inactive state after the side link communication is ended 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.
Further, the side link discontinuous reception method is used for a receiving terminal of side link communication, and comprises the following steps: 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.
Preferably, if the side-link discontinuous reception configuration parameter includes that the side-link reception UE continuously activates the timer, the timer is started when the PSCCH is monitored in the monitored 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.
The beneficial effects of the invention include: the invention provides a side link discontinuous reception method, which standardizes the active and inactive states of SL (side link) communication between a transmitting terminal UE and a receiving terminal UE in side link communication by configuring side link discontinuous reception parameters, can synchronize the active and inactive states between the transmitting terminal UE and the receiving terminal UE in side link communication, and ensures the correct transmission and feedback of SL data under SL DRX.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:
fig. 1 is a diagram illustrating an embodiment of a conventional DRX mechanism;
fig. 2(a) is a flow of a method of a sending terminal according to an embodiment of a side-link discontinuous reception method;
fig. 2(b) is a flow of a receiving terminal method in an embodiment of the side-link discontinuous receiving method;
FIG. 2(c) is a communication process of an embodiment of the side-link discontinuous reception method;
FIG. 3(a) is a flow of a method of a sending terminal according to an embodiment of a side-link discontinuous reception method indicated by a receiving end timer;
FIG. 3(b) is a communication process of an embodiment of the side-link discontinuous reception method indicated by the receiving end timer;
fig. 4 shows an embodiment in which the edge link discontinuous reception configuration parameter is a cell-level common configuration parameter;
fig. 5 is an embodiment of an end start time of an edge link communication active state.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, 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 accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The innovation points of the invention are as follows: the invention creatively configures the configuration parameters of the SL DRX for the DRX mechanism under the side link communication, standardizes the active and inactive states of the side link communication between the sending UE and the receiving UE in the side link communication, and specifies the relevant DRX timer of the SL communication, thereby ensuring the correct transmission and feedback of the side link data under the SL DRX.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1:
fig. 1 is a diagram of an embodiment of a conventional DRX mechanism for communication between a base station and a terminal.
When the terminal is in an active state, if a PDCCH transmitted by the base station is sensed, a drx-inactivity timer (drx-inactivity timer) is started, and the drx-inactivity timer is restarted each time a PDCCH indicating a new transmission is received. For downlink transmission, after performing HARQ (Hybrid Automatic Repeat Request) feedback on the downlink data, the terminal starts an HARQ downlink timer (drx-HARQ-RTT-TimerDL) corresponding to a downlink HARQ process, and after the timer expires, if the data in the process is not decoded successfully, the terminal starts the HARQ downlink retransmission timer (drx-retransmission TimerDL). For uplink transmission, after transmitting uplink data, the terminal starts an HARQ uplink timer (drx-HARQ-RTT-timerll) corresponding to an uplink HARQ process, and starts an uplink retransmission timing (drx-retransmission timerll) after the timer expires. The terminal is in an activated state under the states of an activation timer, a downlink retransmission timer, an uplink retransmission timer and the like. After the corresponding timer is overtime, if a Short discontinuous reception cycle (Short DRX cycle) is configured, the periodic active and inactive states are configured according to the Short DRX cycle, after a certain number of Short discontinuous reception cycles, a Long discontinuous reception cycle (Long DRX cycle) is entered, and the periodic active and inactive states are configured according to the Long DRX cycle.
The embodiment 1 of the present invention provides an existing DRX mechanism, which is used for communication between a base station and a terminal, and is not suitable for communication between terminals under an edge link, and there is no corresponding solution for a discontinuous reception method under the edge link.
Example 2:
fig. 2(a) is a flow of a method of a sending terminal according to an embodiment of a side-link discontinuous receiving method, which may be used for a sending terminal of a side-link communication discontinuous receiving mechanism, and as a 2 nd embodiment of the present invention, a side-link discontinuous receiving method specifically includes the following steps:
step 101, obtaining the configuration parameters of the side link discontinuous reception (SL DRX).
In step 101, a side-link discontinuous reception configuration parameter for enabling a terminal in side-link communication to periodically be in an active state or an inactive state of a discontinuous reception mechanism includes at least 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 terminal in an activated state when the side link communication terminal carries out SL communication; 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.
In step 101, the edge link discontinuous reception time parameter is used to indicate a periodic active or inactive state of an edge link discontinuous reception mechanism, the edge link discontinuous reception timer is started during SL communication, a terminal used for edge link communication after the start exits from the periodic active or inactive state indicated by the edge link discontinuous reception time parameter, and returns to the periodic active or inactive state indicated by the edge link discontinuous reception time parameter until the SL communication ends, and the active or inactive state of an SL DRX mechanism during the exit is indicated by the edge link discontinuous reception timer.
It should be noted that, the activation state of the sidelink discontinuous reception mechanism in the text indicates that the terminal will listen to the scheduling information related to the SL in the activation state; the inactive state of the side-link discontinuous reception mechanism indicates that the terminal does not listen to SL-related scheduling information. The SL-related scheduling information may be scheduling information on the SL transmitted by listening to other terminals and/or the base station.
In step 101, 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; the first starting time is determined by the side link discontinuous reception cycle length and the side link discontinuous reception cycle starting time offset parameter according to a first setting condition.
In step 101, the SL DRX configuration parameters define a SL DRX cycle and an active duration for SL communication within one SL DRX cycle, and the SL DRX configuration parameters indicate a SL DRX cycle length, a SL DRX activation start time, and an active duration in one SL DRX cycle.
Specifically, the SL DRX cycle parameter (DRX-LongCycleStartOffset-SL): further indicating the SL DRX cycle length (DRX-LongCycle-SL) and the SL DRX cycle start time offset parameter (DRX-StartOffset-SL), a first start time t0 may be determined that satisfies the first set condition.
For example, if the current DRX cycle is, the first setting condition is: [ (sfn × 10) + subframe number ] module (the sidelink drx cycle length) ═ the cycle start time offset parameter, then the first start time t0 is the subframe start time satisfying the above condition. It should be noted that modulo is a sign of a modulo operation.
The first setting condition may be a condition in the embodiment of the present invention, or may be another condition, and is not particularly limited herein.
Specifically, the SL DRX activates a start time offset parameter (DRX-SlotOffset-SL): the parameter determines the starting time of SL activation in one SL DRX period by combining with the parameter of the SL DRX period, namely the starting time of the side link discontinuous reception activation state is t0+ DRX-SlotOffset-SL.
Specifically, an SLDRX activation duration parameter (drx-onDurationTimer-SL): this parameter indicates the communication activation duration of the terminal SL within one DRX cycle length (DRX-LongCycle-SL), and in DRX-onDurationTimer-SL, if no other timer for extending the side link activation time is started, the terminal switches to the inactive state after the DRX-onDurationTimer-SL ends, and listens to the PSCCH (Physical side link control channel) when the terminal is in the side link active state according to the DRX parameter of the terminal.
In step 101, optionally, the SL DRX configuration parameter is a cell level common configuration parameter, and the terminal may be in an active state and an inactive state of SL communication synchronously according to the common SL DRX configuration parameter.
Optionally, a common SL DRX parameter is configured for application to multicast 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 receive the data of the transmitting terminal in the active state synchronously.
Optionally, the SL DRX configuration parameters, such as SL DRX cycle parameter, SL DRX offset parameter, SL DRX activation duration parameter, may be configured to a carrier or BWP level, or a resource pool level, or a priority level: if the configuration is carrier or BWP level, each carrier or BWP corresponds to the DRX parameter configuration; if the configuration is at a resource pool level, each resource pool corresponds to the DRX parameter configuration; if configured as priority level, each priority level corresponds to the DRX parameter configuration. Thus, if the SL DRX is at a carrier level/BWP/resource pool level, the corresponding SL active state listens for SL related scheduling information on the corresponding carrier level/BWP/resource pool, and the corresponding SL inactive state does not listen for SL related scheduling information on the corresponding carrier level/BWP/resource pool.
Optionally, the sidelink discontinuous reception configuration parameter is a common configuration parameter or a terminal-specific configuration parameter, and the terminal may obtain the terminal-specific SL DRX configuration parameter and the common SL DRX configuration parameter at the same time, and is in a SL communication active state or a SL communication inactive state at one moment under the common SL DRX configuration parameter, and is in the SL communication active state or the SL communication inactive state under the terminal-specific SL DRX configuration parameter. And when the activation condition under the public SL DRX configuration parameter and/or the activation condition under the SL DRX configuration parameter special for the terminal is met at one moment, the terminal is in a side link activation state and monitors the PSCCH.
Optionally, a dedicated cellular link discontinuous reception (uudrx) configuration parameter for a terminal is used to enable the terminal of Uu communication to be in an active state or an inactive state of a discontinuous reception mechanism, and when the dedicated cellular link discontinuous reception configuration parameter for the terminal and the sidelink discontinuous reception configuration parameter are configured at the same time, if the terminal enables a corresponding discontinuous reception mechanism to be in an interception active state according to one of the configuration parameters, the other discontinuous reception mechanism is also in an interception active state.
Specifically, the terminal may obtain DRX (Uu DRX) configuration parameters for a UE-specific cellular link for communication between the terminal and the base station for intercepting a PDCCH transmitted by the base station, and the terminal may be periodically in an active and inactive state for Uu communication according to the terminal-specific Uu DRX configuration parameters. Optionally, when the terminal is in an active state of Uu communication according to the terminal-specific Uu DRX parameter, the terminal SL communication is in an active state, or when the terminal is in an active state of SL communication according to the SL DRX parameter, the terminal Uu communication is in an active state.
Optionally, if the terminal only configures the SL DRX configuration parameters, the terminal is also in the Uu communication active state when in the SL communication active state according to the SL DRX configuration parameters, and will listen to the PDCCH sent by the base station.
Optionally, grouping the UEs, and configuring the same common SL DRX configuration parameters for a group of UEs, that is, the UEs in the same group may be in the SL communication active and inactive states synchronously according to the common SL DRX configuration parameters; different groups of UEs may have different SL DRX configuration parameters, i.e., different groups of UEs may not be in SL communication active and inactive states synchronously. Alternatively, the UE groups may be grouped according to the identity of the UE, or the priority, etc.
In step 101, the sidelink discontinuous reception (SL DRX) timer is one or more of the following timers: the side link transmission HARQ retransmission Timer (drx-retransmission Timer-SLT) includes a drx-inactivity Timer-SLT, a drx-inactivity Timer-SLR, a drx-HARQ-RTT-Timer-SLR, a drx-retransmission Timer (drx-retransmission Timer-SLR), a drx-RTT-Timer (drx-HARQ-Timer-SLT), and a drx-retransmission Timer (drx-retransmission Timer-SLT).
Specifically, the sidelink sending UE continuously activates a timer, i.e. a first timer, and starts the timer when the sending terminal meets a second set condition of a continuous SL communication activation state, and the terminal is in an "Active" state, i.e. an activation state of the SL DRX mechanism, in this time period.
Optionally, the second setting condition may be that the sending terminal senses scheduling information (which may be a PDCCH or a PDSCH) indicating the SL new transmission or retransmission, or that a preset period of time elapses after the sending terminal senses the scheduling information indicating the SL new transmission, and the timer restarts the timer after detecting that the second setting condition is satisfied each time. It should be noted that the preset period of time may be indicated in the scheduling information indicating SL new transmission or retransmission, or indicated in SL DRX-related configuration information (the SL DRX configuration parameters).
The edge link receiving UE continuously activates a timer, that is, a second timer, when a receiving terminal receives a PSCCH (Physical sidelink shared channel) indicating new transmission or retransmission, the timing is started, the terminal is in an "Active" state in the time period, and when a new PSCCH indicating new transmission or retransmission is received in the time period, the timer is restarted.
The side link receives an HARQ timer, i.e. a third timer: when a receiving terminal performs data reception detection in an HARQ process, the timer is started after corresponding HARQ Feedback is performed, that is, the timer is started after SFCI (Sidelink Feedback Control Information) is sent.
The side link reception HARQ retransmission timer, that is, the fourth timer: and when the side link receiving HARQ timer is overtime and meets a third set condition, starting the timer, and enabling the terminal to be in an Active state in the time period.
The third setting condition may be set to expect a retransmission corresponding to incorrect detection of data in the HARQ process, or may be set to another condition, and is not particularly limited herein.
The side link transmission HARQ timer, i.e. the fifth timer: the timer is started after the transmitting terminal transmits a corresponding UCI (Uplink Control Information) according to the SFCI received in one HARQ process.
The side link transmission HARQ retransmission timer, that is, a sixth timer: and when the side link HARQ sending timer is overtime and meets a fourth set condition, starting the timer, and enabling the terminal to be in an Active state in the time period.
The fourth setting condition may be set to expect that the base station schedules retransmission resources for the HARQ process data that is not correctly transmitted, and may be set to other conditions, which are not particularly limited herein.
Optionally, the first timer and the second timer may be the same, and are the same configuration parameter.
Optionally, the SL DRX timer may be configured as a common parameter, that is, any one or several of the first to sixth timers may be configured as a common parameter; the SL DRX timer may be applied to multicast and or broadcast communication scenarios.
Optionally, the SL DRX timer may be configured at a carrier or BWP level, or a resource pool level, or a priority level: if the configuration is carrier or BWP level, that is, each carrier or BWP corresponds to the DRX timer configuration; if the configuration is in a resource pool level, namely, each resource pool corresponds to the configuration of the DRX timer; if configured as priority level, each priority level corresponds to the DRX timer configuration.
Alternatively, the UEs may be grouped, and a group of UEs may be configured with the same common SL DRX timer, that is, UEs in the same group may use the common SL DRX timer, and UEs in different groups may be configured with different common SL DRX timers.
Alternatively, the terminal may acquire the terminal-specific SL DRX timer and the common SL DRX timer at the same time, and select to use the terminal-specific SL DRX timer or the common SL DRX timer according to a specific SL communication scenario. For example, for multicast and or broadcast communications, a corresponding common SL DRX timer may be employed.
Optionally, the terminal configures both a UE-specific cellular link DRX timer (Uu DRX timer) and a SL DRX timer for communication with the base station, and the terminal listens to the PDCCH and sets the relevant Uu DRX timer based on the UE-specific Uu DRX configuration parameters. Accordingly, the SL DRX timer may multiplex the Uu DRX timer in SL communication under base station scheduling. For example, the first timer may multiplex a persistent activation timer (drx-inactivity timer), the fifth timer may multiplex a HARQ downlink timer (drx-HARQ-RTT-TimerDL), and the sixth timer may multiplex a downlink retransmission timer (drx-retransmission TimerDL), that is, when the UE feeds back HARQ information of the SL to the base station, the HARQ downlink timer may be started, and when the timer expires, the UE may desire to acquire a retransmission for the HARQ, the downlink retransmission timer may be started.
In step 101, the SL DRX configuration parameter specifies an SL communication active state ending start time after the terminal SL communication ends.
Specifically, according to the sidelink discontinuous reception time parameter of the SL DRX configuration parameter and the sidelink discontinuous reception timer, when the SL transmitting UE can know that the receiving UE is in an active state (for example, the SL DRX timer is configured to be a common property), the second, third, and fourth timers are included, after the end of data interaction between SLs, the time for the transmitting UE and the receiving UE to enter an inactive state from an active state of SL communication after SL communication may be inconsistent, and the end start time of the sidelink communication active state of the transmitting terminal or the receiving terminal in sidelink communication is modified to be the same. It should be noted that, the ending start time of the side link communication activation state of only the sending terminal or only the receiving terminal may be modified, or both may be modified, which is not limited herein.
In step 101, if the sidelink DRX time parameter includes a short SL DRX cycle time parameter and a long SL DRX cycle time parameter, the 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.
Specifically, if a terminal configures a short SL DRX cycle and a long SL DRX cycle, after the SL communication enters an inactive state, M (M is an integer greater than or equal to 1) short SL DRX cycles are first experienced. Assuming that the short SL DRX cycle parameters include a short DRX cycle length (DRX-short cycle-SL), before entering the short SL DRX cycle, determining a start time T0 for entering the short SL DRX cycle according to a fifth setting condition for SL DRX, assuming that the fifth setting condition is: [ (system frame number × 10) + subframe number ] module (DRX-ShortCycle-SL) ═ DRX-StartOffset-SL, the terminal is in active state in one short SL DRX cycle after the cycle start time offset parameter (DRX-StartOffset-SL).
And after M short SL DRX cycles, entering a long SL DRX cycle, wherein the DRX cycle length adopted by the long SL DRX cycle is the cycle length (DRX-LongCycle-SL), and the parameter M and the DRX-ShortCycle-SL can be public or UE-dedicated SL DRX configuration parameters.
It should be noted that, the long SL DRX cycle time parameter, i.e. the above-mentioned sidelink DRX time parameter, is not described repeatedly herein for the specific configuration of the long SL DRX cycle time parameter.
The fifth setting condition may be other conditions, and is not particularly limited herein.
It should be further noted that the manner for the terminal to obtain the configuration parameters of the side link discontinuous reception (SL DRX) may be transmitted by the base station or other terminal devices, or the terminal writes in the device according to a protocol convention.
It should be further noted that, the SL DRX function corresponding to the sidelink discontinuous reception (SL DRX) configuration parameter may be configured to be enabled (enabled) or disabled (disabled), for example, when the SL DRX configuration parameter on a resource pool is disabled, the terminal continues to be in the SL communication active state on the resource pool until the SL DRX is enabled.
102, according to the side link discontinuous reception configuration parameters, after monitoring the scheduling information indicating SL transmission, sending PSCCH and corresponding PSSCH to the receiving terminal, and entering a corresponding activated or inactivated state after the side link communication is finished.
In step 102, if the side-link discontinuous reception configuration parameter includes a side-link transmission UE continuously activating a timer, starting the timer under a second setting 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 the side link transmission enables a HARQ feedback mechanism that a transmitting terminal reports corresponding PSSCH to a base station, reporting 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 corresponding to the 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, and starting the side link transmission HARQ retransmission timer if the side link transmission HARQ timer is overtime and the HARQ process data is not successfully transmitted and needs the base station to reschedule resources.
In step 102, when the sending terminal is in side link communication, starting a related timer configured for the sending terminal, exiting from an activated state or an inactivated state indicated by the side link discontinuous reception time parameter, and the sending terminal being in the activated state indicated by the related timer; and after the side link communication is finished, if no other indication information exists, the corresponding activated state or non-activated state when the sending terminal recovers to exit is sent.
In step 102, the SL sending UE enters the SL active or inactive state according to the SL DRX configuration parameters after the SL communication is completed, where the SL DRX configuration parameters include parameters related to the sending UE entering the active state, which has been discussed in detail in step 101. The sending UE may enter an active state or an inactive state after the SL communication is completed.
In step 102, the SL sending UE enters the SL inactive state according to the DRX configuration after the SL communication is completed, and if the short SL DRX cycle time parameter and the long SL DRX cycle time parameter are configured for the sending UE at the same time, the sending UE may enter the short SL DRX cycle from the inactive state and then enter the long SL DRX cycle, or may directly enter the long SL DRX cycle.
Preferably, the time when the transmitting UE enters the active state after the SL communication is completed may be synchronized with the receiving UE. When it needs to be noted, 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, and/or the relevant timer in the SL communication activation state is expired.
Further, the sending terminal may also receive an indication of other terminals (e.g., receiving UE) and/or the base station to enter the SL DRX inactive state.
Fig. 2(b) is a flow of a method of a receiving terminal in an embodiment of a side-link discontinuous receiving method, which can be used for a receiving terminal of a side-link discontinuous receiving mechanism for communication, and specifically includes the following steps:
step 201, obtaining the side link discontinuous reception configuration parameters.
The method for configuring the edge link discontinuous reception configuration parameters for the receiving terminal in step 201 is the same as that for the sending terminal, and the discussion is not repeated here.
And 202, according to the side link discontinuous reception configuration parameters, monitoring the PSCCH sent by the sending terminal in the activation state of discontinuous reception and detecting the corresponding PSSCH, and entering the corresponding activation or non-activation state after the side link communication is finished.
In step 202, if the side-link discontinuous reception configuration parameter includes a side-link reception UE continuously activating a timer, starting the timer when a PSCCH indicating new transmission or retransmission of the SL is monitored in a monitored activation state; if the side link discontinuous reception configuration parameters comprise a side link reception HARQ timer and the side link transmission enables an HARQ transmission feedback mechanism of the side link, transmitting corresponding HARQ feedback information on a received PSFCH associated with PSSCH, and starting the side link reception HARQ timer after transmission; 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 an HARQ transmission feedback mechanism of the side link, the side link reception HARQ timer is started after the side link reception HARQ timer is overtime and meets a third set condition, if the side link reception HARQ timer is overtime, and the side link reception HARQ timer is started when the HARQ process data is not successfully received and needs to be retransmitted by the sending terminal.
In step 202, when the receiving terminal is in side link communication, a relevant timer configured for the receiving terminal is started, and at this time, the receiving terminal exits from an activated state or an inactivated state indicated by the side link discontinuous reception time parameter, and is in the activated state indicated by the relevant timer; and after the side link communication is finished, if no other indication information exists, the receiving terminal restores the corresponding activated state or the non-activated state when quitting.
In step 202, the SL receiving UE enters an SL inactive state according to DRX configuration after the SL communication, and 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 SL receiving UE may enter the short SL DRX cycle from the inactive state and then enter the long SL DRX cycle, or may directly enter the long SL DRX cycle.
When it needs to be stated, the end or completion of the SL communication may indicate that no new data or retransmission SL scheduling data needs to be received for the receiving UE, and or no detection result of the SL transmission data needs to perform HARQ feedback, and or the relevant timer in the active state is overtime.
Further, the receiving terminal may also receive an indication of other terminals (e.g., the sending UE) and/or the base station to enter the SL DRX inactive state.
Fig. 2(c) shows a communication process of an embodiment of the side-link discontinuous reception method, which is a SL communication flow under base station scheduling, specifically,
the SL DRX configuration parameters include the first to sixth timers,
and for the SL transmitting UE, assuming that the second set condition is that the terminal monitors the PDCCH for indicating the SL to transmit newly, the transmitting terminal starts the first timer when monitoring the PDCCH of the base station for scheduling SL communication resources in an activated state. And assuming that the second setting condition is that a preset certain time passes after the terminal monitors the PDCCH for indicating the SL to newly transmit, starting the first timer after the preset certain time passes after the terminal monitors the PDCCH for scheduling SL communication resources by the base station in the activated state.
The sending terminal sends PSCCH and corresponding PSSCH to the receiving UE according to the scheduling information indication, if SL transmission enables a HARQ feedback mechanism of SL, the sending UE detects corresponding HARQ feedback information SFCI on PSFCH related to the transmitted PSSCH; if the current SL transmission enables a sending UE to report a HARQ feedback mechanism of a corresponding PSSCH to a base station, the sending UE reports HARQ information corresponding to the PSSCH transmission scheduled by the scheduling information on a resource indicated by the base station, and after the reporting, a fifth timer of a HARQ process scheduled by the scheduling information is started; and after the fifth timer is overtime and a fourth set condition is met, starting the sixth timer (if the terminal does not expect the base station to schedule retransmission resources for the correct transmission of the HARQ process data).
For SL receiving UE, detecting PSCCH sent by SL sending UE in an activation state, starting the second timer, detecting corresponding PSSCH according to PSCCH indication, if SL transmission enables a HARQ transmission feedback mechanism of SL, receiving UE sending corresponding HARQ feedback information SFCI on PSFCH associated with the received PSSCH, and starting the third timer of HARQ process corresponding to the PSSCH after sending; and after the third timer is overtime, starting the fourth timer when a third set condition is met (for example, the terminal expects the sending UE to initiate retransmission for the incorrect transmission of the HARQ process data).
Further, after the SL communication, the SL sending UE and the receiving UE enter a SL inactive state, then enter a short SL DRX cycle from the inactive state, and then enter a long SL DRX cycle, or directly enter the long SL DRX cycle.
Specifically, a terminal SL enters an inactive state after communication is finished, enters an SL DRX cycle according to the SL DRX configuration, assuming that the sending UE determines a start time T0_ TX to enter the SL DRX cycle according to a first set condition of the SL DRX, and when the sending UE acquires the length of the SL DRX cycle, the sending UE is in an active state in one SL DRX cycle at T0_ TX + DRX-StartOffset-SL (UE SL DRX configuration).
The embodiment of the invention provides an SL DRX method, which defines a DRX mechanism of side link communication, can synchronize the active state and the inactive state between a transmitting terminal UE and a receiving terminal UE in the side link communication and ensure the correct transmission and feedback of SL data.
Example 3:
fig. 3(a) is a flow of a terminal sending method in an embodiment of a side link discontinuous reception method indicated by a receiving end timer, where the side link discontinuous reception method specifically includes the following steps:
step 301, obtaining the side link discontinuous reception configuration parameters.
In step 301, the edge-link discontinuous reception timer in the edge-link discontinuous reception configuration parameter is at least one of the following: the second timer, the third timer and the fourth timer.
The method for acquiring the edge link discontinuous reception 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 the scheduling information indicating the SL transmission is monitored, the PSCCH and the corresponding PSCCH are sent to the receiving terminal, and after the side link communication is finished, the receiving terminal enters a corresponding activated or inactivated state.
In step 302, for the SL transmitting UE, the SL communication active state will be continued provided that the sixth setting condition is satisfied. The sixth setting condition is that when the sending UE monitors the scheduling information for scheduling the SL transmission in the active state, or when a certain time elapses after the sending UE monitors the scheduling information for scheduling the SL transmission in the active state.
In step 302, the time for entering the corresponding active or inactive state after the SL communication is ended according to the DRX configuration is determined according to the DRX configuration, as described in step 101.
In step 302, optionally, the sending UE synchronously enters the inactive state after the side link communication according to the side link discontinuous reception timer of the receiving terminal, that is, the time for the sending terminal to enter the inactive state is the same as that of the receiving terminal.
In step 302, the SL sending UE enters the SL inactive state after the SL communication, enters the short SL DRX cycle from the inactive state and then enters the long SL DRX cycle, or directly enters the long SL DRX cycle.
Optionally, the sending terminal may also receive an indication of other terminals (e.g., receiving UE) and/or the base station to enter the SL DRX inactive state.
Fig. 3(b) is a communication process of an embodiment of the side link discontinuous reception method indicated by the receiving end timer, and when the SL DRX configuration parameter at least includes the second to fourth timers, an SL communication flow under base station scheduling specifically is:
for the SL transmitting UE, the SL communication active state will be continued provided that the sixth setting condition is satisfied. The sixth setting condition is that when the sending UE monitors the scheduling information for scheduling SL transmission in the active state, or when a certain time elapses after the sending UE monitors the scheduling information for scheduling SL transmission in the active state.
And for the SL receiving UE, detecting the PSCCH sent by the SL sending UE in an activated state, starting the second timer, and detecting the corresponding PSSCH according to the PSCCH indication. If the current SL transmission enables the HARQ transmission feedback mechanism of the SL, the receiving UE sends 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 sending. And after the third timer is overtime, starting the fourth timer when the third set condition is met (for example, the terminal expects the sending UE to initiate retransmission for the incorrect transmission of the HARQ process data).
The terminal enters the SL inactive state after SL communication according to the DRX configuration, then enters the short SL DRX cycle from the inactive state and then enters the long SL DRX cycle, or directly enters the long SL DRX cycle as described in step 101. Optionally, the terminal may also receive an indication of the base station or other terminals to enter the SL DRX inactive state.
In embodiment 3 of the present invention, the manner of sending UE to enter "Inactive" mode (Inactive state) may not be limited to one of the following: 1) entering an "Inactive" mode according to a SL DRX timer of the receiving UE, including: when the sending UE monitors the scheduling information for scheduling SL transmission in the active state, the sending UE is continuously in the active state and synchronously enters the inactive state after SL communication according to the SL DRX related timer of the receiving UE. 2) After the SL communication is finished, the scheduling information indicating the SL new transmission is not received after a certain time.
It should be noted that, the sending UE entering the inactive state may be synchronized with the receiving UE, may also be out of synchronization, and may be configured in advance whether to be synchronized or not.
In embodiment 3 of the present invention, the discontinuous reception method of the receiving UE is the same as that of embodiment 2, and the discussion is not repeated here.
In embodiment 3 of the present invention, after the side link communication is finished, the sending terminal enters an active state or an inactive state according to the relevant timer of the receiving terminal. It should be noted that, no matter whether the SL DRX configuration parameter configures a relevant timer for the sending UE, the sending terminal may enter an active state or an inactive state according to the relevant timer of the receiving terminal, and the sending terminal may enter the active state or the inactive state according to the relevant timer of the receiving terminal, and may indicate in the SL DRX configuration parameter or other indication information.
The side link discontinuous receiving method provided by the invention can effectively carry out SL communication between the sending UE and the receiving UE, and ensures the correct transmission and feedback of SL data.
Example 4:
fig. 4 is an embodiment of the edge link discontinuous reception configuration parameter being a cell-level common configuration parameter.
In embodiment 4 of the present invention, the SL DRX configuration parameter is a cell-level common configuration parameter, and the terminal may be in an active and inactive state of SL communication synchronously according to the common SL DRX configuration parameter.
Specifically, the first terminal UE _1 and the second terminal UE _2 are both configured with the same common SL DRX configuration parameters, so that the start time of the first terminal and the second terminal entering the DRX mechanism listening active state is aligned, the start time of the first terminal entering the DRX mechanism listening inactive state is aligned, and the DRX cycle lengths of the first terminal and the second terminal are the same.
Example 5:
fig. 5 is an embodiment of an end start time of a side link communication active state, which specifies the end start time of the side link communication active state after the SL communication is ended.
Specifically, according to the SL DRX configuration parameters, when the SL sending UE can know that the receiving UE is in an active state (for example, the SL DRX timer is configured to have a common property), the SL sending UE may include the second to fourth timers, after the data interaction between the SLs is ended, the time for the sending UE and the receiving UE to enter the inactive state from the SL communication active state after the SL communication may be inconsistent, the sending UE enters the inactive time (for example, the first timer or the sixth timer on the sending UE side times out) as a sending timeout time (timertouttx), the receiving UE enters the inactive time (for example, the second timer or the fourth timer on the receiving UE side times out) as a receiving timeout time (timertout Rx), and the difference between the timertoutjttx and the rtoutrx _ Rx _ is an Offset value, which may be positive or negative.
Alternatively, the sending UE may extend the entering inactivity time timeriout _ Tx by the above Offset, i.e., the sending UE may modify the entering inactivity time to timeriout _ Tx + Offset, so that the sending UE and the receiving UE synchronously enter an inactive state.
It should be noted that, the embodiment 5 of the present invention describes modifying the end start time of the side link communication active state of the sending terminal, modifying the end start time of the side link communication active state of the receiving terminal, or modifying the end start time of the side link communication active states of the sending terminal and the receiving terminal at the same time, which is not limited herein.
It is to be noted that the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (16)

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 comprises the following steps: the edge link discontinuous reception timer at least comprises one of the following parameters: the side link discontinuous receiving time parameter and the 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 activated state when the side link communication is carried out by the side link communication terminal;
the end starting time of the side link communication activation state is the time when the terminal enters the non-activation state after the data interaction in the side link communication is finished;
the side link discontinuous reception timer is one or more of the following timers: the side link sending UE continuously activates a timer, a side link receiving HARQ retransmission timer, a side link sending HARQ timer and a 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 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;
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 transmission UE is in a discontinuous reception mechanism activation state in the timer starting time period;
the SL communication is finished or the sending UE is indicated as no new data or retransmission data is sent to the receiving UE, and/or the relevant timer in the SL communication activation state is overtime;
the SL communication is finished or the receiving UE indicates that no new data or retransmission SL scheduling data needs to be received, and/or the detection result of no SL transmission data needs to carry out HARQ feedback, and/or the relevant timer in the activated state is overtime;
the second setting condition is as follows: 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; the third setting condition is as follows: expecting a retransmission corresponding to incorrect detection of data in the HARQ process; the fourth setting condition is: the base station is expected to schedule retransmission resources for the incorrect transmission of HARQ process data.
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;
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;
the first setting condition is as follows: [ (sfn × 10) + subframe number ] modulo (the sidelink drx cycle length) ═ the cycle start time offset parameter.
3. The side-link discontinuous reception method of claim 1, wherein the side-link discontinuous reception timer further comprises: the side link receives UE and continuously activates a timer; the side link receiving UE continuously activates the timer, the side link receiving UE is started when the side link communication receiving UE receives the PSCCH indicating new transmission and/or retransmission, the receiving UE is in a discontinuous receiving mechanism activation state in the timer starting time period, and the side link receiving UE continuously activates the timer if the receiving UE receives the PSCCH indicating SL new transmission and/or retransmission in the timer starting time period.
4. The side-link discontinuous reception method of claim 1, wherein if the side-link discontinuous reception configuration parameter is a cell-level common configuration parameter, a terminal in side-link communication is simultaneously in a discontinuous reception mechanism active state or a discontinuous receiver mechanism inactive 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 acquires 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 sidelink discontinuous reception method of claim 1, wherein the sidelink 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 a discontinuous reception mechanism corresponding to M of the short SL DRX cycle time parameters, and then enters the active state or the inactive state of the discontinuous reception mechanism corresponding to the long SL DRX cycle time, where M is an integer greater than or equal to 1.
12. The side-link discontinuous reception method according to any of claims 1 to 11, 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.
13. The side-link discontinuous reception method of claim 12,
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 the side link transmission enables a HARQ feedback mechanism that a transmitting terminal reports corresponding PSSCH to a base station, reporting 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.
14. The side-link discontinuous reception method of claim 12, 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.
15. The side-link discontinuous reception method according to any of claims 1 to 11, used in 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.
16. The side-link discontinuous reception method of claim 15,
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 the side link transmission enables an HARQ transmission feedback mechanism of the side link, transmitting corresponding HARQ feedback information on a received PSFCH associated with PSSCH, and starting the side link reception HARQ timer after transmission;
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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