CN116455539A

CN116455539A - Side link resource selection method and device

Info

Publication number: CN116455539A
Application number: CN202210023577.9A
Authority: CN
Inventors: 梁敬; 吴建明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2023-07-18
Also published as: WO2023131304A1

Abstract

The application discloses a method and a device for selecting side link resources, which belong to the technical field of wireless communication, and the method for selecting the side link resources in the embodiment of the application comprises the following steps: the method comprises the steps that a terminal obtains a first side link candidate resource subset and a second side link candidate resource subset, wherein resources in the first side link candidate resource subset are in the activation time of at least one receiving end, and resources in the second side link candidate resource subset are not in the activation time of at least one receiving end; the terminal selects target resources in the first side link candidate resource subset and/or the second side link candidate resource subset.

Description

Side link resource selection method and device

Technical Field

The application belongs to the technical field of wireless communication, and particularly relates to a method and a device for selecting side link resources.

Background

In the resource selection of the sidelink (sidelink), after the physical layer selects candidate resources through the resource selection and provides the candidate resources to the higher layer, the higher layer selects the resources for initial transmission and/or retransmission, but no explicit method for selecting the resources exists in the higher layer at present, so that the selected resources are difficult to use and cannot be received by the receiving end in some situations.

Disclosure of Invention

The embodiment of the application provides a method and a device for selecting side link resources, which can solve the problems of how to select resources for primary transmission and/or retransmission by a high layer, enabling the selected resources to be used as much as possible and enabling a receiving end to normally receive the resources.

In a first aspect, a method for selecting a sidelink resource is provided, the method comprising:

the method comprises the steps that a terminal obtains a first side link candidate resource subset and a second side link candidate resource subset, wherein resources in the first side link candidate resource subset are in the activation time of at least one receiving end, and resources in the second side link candidate resource subset are not in the activation time of at least one receiving end;

the terminal selects target resources in the first side link candidate resource subset and/or the second side link candidate resource subset.

In a second aspect, there is provided a sidelink resource selection device, comprising:

an obtaining module, configured to obtain a first side link candidate resource subset and a second side link candidate resource subset, where resources in the first side link candidate resource subset are within an activation time of at least one receiving end, and resources in the second side link candidate resource subset are not within an activation time of at least one receiving end;

And the selection module is used for selecting target resources from the first side link candidate resource subset and/or the second side link candidate resource subset.

In a third aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to obtain a first side link candidate resource subset and a second side link candidate resource subset, where resources in the first side link candidate resource subset are in an activation time of at least one receiving end, and resources in the second side link candidate resource subset are not in an activation time of at least one receiving end; selecting a target resource from the first and/or second sub-sets of sidelink candidate resources.

In a fifth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor realizes the steps of the method according to the first aspect.

In a sixth aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor for running a program or instructions to implement the method of the first aspect.

In a seventh aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to carry out the steps of the method according to the first aspect.

In the embodiment of the application, when the resource selection of the sidelink is performed at a high layer, the activation time of the receiving end is considered, so that the selected resource can be utilized to the greatest extent, the problem that the selected resource cannot be used due to the non-activation time of the receiving end or cannot be received even if the receiving end is used is avoided, and the reliability of the resource sidelink selection is improved.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

FIG. 2 is a schematic diagram of a DRX cycle;

fig. 3 is a schematic diagram of a DRX related timer;

fig. 4 is a flow chart of a sidelink resource selection method according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a sidelink resource selection device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 7 is a schematic hardware structure of a terminal according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

The communication vocabulary relevant to the present application will be described first.

1. Introduction to sidelink

A long term evolution (Long Term Evolution, LTE) system supports sidelink (or sidelink, etc.) from release 12 for direct data transmission between end User Equipments (UEs) without a network device.

The UE transmits sidelink control information (Sidelink Control Information, SCI) over a physical sidelink control channel (Physical Sidelink Control Channel, PSCCH), scheduling transmission of a physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) to transmit data. The transmission is in a broadcast form, and the receiving end does not feed back whether the reception is successful to the transmitting end.

The LTE sidelink design supports two resource allocation modes, a scheduled resource allocation (Scheduled resource allocation) mode and an autonomous resource selection (autonomous resource selection) mode, respectively. The former is controlled by the network side equipment and allocates resources for each UE, and the latter is autonomously selected by the UE.

Starting from release 15, LTE supports sidelink carrier aggregation (Carrier Aggregation, CA). The CA and Uu interfaces of LTE sidelink (i.e., downlink and uplink) are different, and there is no division of the primary carrier (Primary component carrier, PCC) and secondary carrier (Secondary component carrier, SCC). The UE in autonomous resource selection mode performs resource awareness (sensing) and resource reservation on each CC independently.

The design of the LTE sidelink is suitable for specific public safety matters (such as emergency communication in disaster places like fire places or earthquakes), or Internet of vehicles (vehicle to everything, V2X) communication and the like. The internet of vehicles communication includes various services such as basic security type communication, advanced (automatic) driving, formation, sensor expansion, and the like. Since LTE sidelink only supports broadcast communications, it is mainly used for basic security class communications, and other advanced V2X services will be supported by NR sidelink.

The 5G NR system can be used for the working frequency band above 6GHz which is not supported by LTE, and supports larger working bandwidth, but the NR system of the current version only supports the interface between the base station and the terminal, but does not support the Sidelink interface for direct communication between the terminals.

Specifically, in the architecture of proximity services (Proximity Service, proSe) networks, the communication interface between terminals is called a PC5 interface, and the interface where the terminals are connected to access network devices such as an evolved universal communication radio access network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) is called a Uu interface.

2. Transmission form of sidelink

Current sidelink transmission is also mainly divided into several transmission forms of broadcast (broadcast), multicast (groupcast) and unicast (unicast). Unicast, as the name implies, is a one-to-one (one to one) transmission. Multicasting is a one-to-many (one-to-many) transmission. Broadcast is also a transmission of one to the management, but broadcast does not have the concept that UEs belong to the same group.

Current sidlink unicast and multicast communications support physical layer hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback mechanisms.

Furthermore, NR sidelink defines two modes (modes), one is mode1, where the base station schedules resources, and one is mode2, where the UE itself decides what resources to use for transmission, where the resource information may come from a broadcast message or a pre-configuration by the base station. The UE may be mode1 and/or mode2 if operating within the range of the base station and having a radio resource control (Radio Resource Control, RRC) connection with the base station, and may only operate in mode2 if operating within the range of the base station but without an RRC connection with the base station. If the UE is out of range of the base station, then it can only operate in mode2 and V2X transmission is performed according to pre-configured information. mode2 can also be further divided into 2a,2b,2c,2d.

3. Resource pool

When V2X is transmitted, there is a concept of "Resource pool", where the Resource pool is sent or preconfigured by the network side, where the Resource pool includes resources used for transmission and many transmission related parameters, such as in LTE, an offset value of a first subframe of the Resource pool, a bitmap (bitmap) corresponding to the Resource pool, whether PSCCH and PSSCH will be transmitted in adjacent Resource Blocks (RBs), the number of subchannels and the size of each subchannel, and a minimum RB index value corresponding to a subchannel, a minimum RB index value corresponding to a PSCCH pool, an S-RSSI threshold of CBR measurement, and a region identifier.

In addition to configuring the UE with an ordinary transmission resource pool, the network side may also configure an abnormal resource pool (abnormal pool) that is used in some special situations, such as during handover, or in the occurrence of radio link failure (radio link failureRLF), or in the transition from IDLE state (IDLE) to CONNECTED state (CONNECTED), etc.

For UEs under different network coverage, the resource pool and corresponding resources may be selected based on network scheduling, or the resource pool may be selected autonomously based on pre-configuration. The selection of the resource pool may require that the resource pool associated with the region in which the UE is located is selected in consideration of the region. While the autonomous selection of resources in the resource pool is mainly based on a sensing (sensing) mechanism, random selection is also possible (e.g., for the selection of resources in an abnormal resource pool).

4. DRX of RRC connected state under Uu interface

The purpose of discontinuous reception (Discontinuous Reception, DRX) is for power saving, terminals in DRX state do not need to connect to the listening control channel. But if the terminal does not listen to the control channel for a long time, the delay of data transmission will be increased once there is data. In order to achieve both power saving and transmission delay, 5GMAC supports two DRX cycles, a DRX long cycle and a DRX short cycle, according to the length of time that the terminal listens to the channel. If the predicted terminal data amount is more frequent or the service is more sensitive to time delay, the network can configure the terminal to use the DRX short period; if the predicted terminal data size is sparse and delay insensitive, the network can configure the terminal to use only DRX long periods. In order to facilitate the terminal to make a DRX long cycle/DRX short cycle handover, it is required that the DRX long cycle is an integer multiple of the DRX short cycle, so that continuous listening time (onDuration) alignment of both is guaranteed.

In order to support the DRX mechanism, the base station configures a DRX related timer and parameters for the terminal, including:

(1) DRX-longcyclestatoffset, a period and an offset for configuring a long DRX cycle, the unit of the period and the offset being milliseconds;

(2) DRX-short cycle, which is a period and offset for configuring a short DRX cycle, the unit of period and offset is milliseconds;

(3) The DRX-short cycle timer is used for controlling the duration of a terminal using a short DRX period, and the unit is an integer, which means that once the terminal enters the short DRX period, the terminal needs to maintain the integer multiple of the short period;

(4) DRX-onduration timer, during which the terminal needs to continuously monitor the PDCCH control channel of the network. The timer unit is milliseconds;

(5) The time delay of starting or restarting the DRX-onDuration timer by the terminal, and setting the offset of the starting time of the DRX onDuration relative to the starting point of the subframe by the parameter, wherein the offset is an integer multiple of 1/32 millisecond;

(6) DRX inactivity timer. The method comprises the steps that a timer is started or restarted at a first symbol after a terminal receives a PDCCH signaling aiming at uplink/downlink new data, and the terminal needs to monitor a control channel continuously during the running period of the timer, wherein the unit of the timer is millisecond;

(7) drx-HARQ-RTT-TimerDL: a downlink HARQ RTT timer maintained on a per downlink procedure basis, the timer length being the minimum time interval from the HARQ feedback moment to the HARQ retransmission for that procedure. The terminal starts or restarts the timer at the first symbol after the HARQ NACK feedback for the process only if the data corresponding to the downstream process is not successfully decoded. If the current terminal only runs the drx-HARQ-RTT-TimerDL and/or the drx-HARQ-RTT-TimerUL, the terminal does not need to monitor the PDCCH control channel, and the timer unit is a symbol; the drx-HARQ-RTT-timer ul is maintained on a per-uplink-procedure basis, which is the minimum time interval from the PUSCH transmission time to the HARQ retransmission for that procedure. After uplink PUSCH transmission, the terminal starts or restarts an uplink HARQ RTT timer for the uplink process, and if PUSCH transmission uses PUSCH repetition, the uplink HARQ RTT timer is started or restarted after PUSCH repetition for the first time, so as to ensure that the base station can timely terminate PUSCH repetition transmission after parsing out PUSCH in advance. The timer unit is a symbol;

(8) The next symbol after the drx-HARQ-RTT-TimerDL timeout starts or restarts the downlink retransmission timer. During the running of the timer, the terminal listens to the control channel of the network, and if downlink scheduling information or downlink configured grant for the process is received, the timer is stopped. The timer unit is a time slot;

(9) The next symbol after the drx-HARQ-RTT-TimerUL timeout starts or restarts the uplink retransmission timer. During the running of the timer, the terminal listens to the control channel of the network, and stops running if uplink scheduling information or uplink configured grant for the process is received. The timer unit is a time slot.

The basic mechanism of DRX and related parameters are described above, all of which constitute a set of DRX configuration according to which UE performs corresponding discontinuous reception operation.

Referring to fig. 2, fig. 2 is a schematic diagram of a DRX Cycle (Cycle), and as can be seen from fig. 2, time is divided into consecutive DRX cycles in the time domain.

Referring to fig. 3, fig. 3 is a schematic diagram of a DRX related timer.

5、sidelink DRX

Currently sidelink also supports DRX configuration for both unicast multicast and broadcast. For the on-duration timer, three cast types are currently supported. For the Inactivity timer, unicast and multicast support, broadcast is temporarily not supported.

In addition, unlike Uu, since both the transmitting and receiving ends are UEs on the sidelink, the behavior of the receiving end UE and the behavior of the transmitting end UE may need to be defined. Only the next slot or symbol (symbol) after the reception of the first SCI (Sidelink Control Information ) and second SCI is discussed for a Receiving (RX) UE to start or restart the activity timer.

6. sidelink resource selection

Because the sidelink introduces the DRX, the receiving terminal (RX) UE is not in a state of being always received, so that before the transmitting Terminal (TX) transmits data, the activation time of the receiving terminal (RX) UE needs to be considered first, and resources in the corresponding activation time are selected for transmission, so that the transceiving can be normally performed.

The method and apparatus for selecting a sidelink resource according to the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 4, an embodiment of the present application provides a sidelink resource selection method, which includes:

step 41: the method comprises the steps that a terminal obtains a first side link candidate resource subset and a second side link candidate resource subset, wherein resources in the first side link candidate resource subset are in the activation time of at least one receiving end, and resources in the second side link candidate resource subset are not in the activation time of at least one receiving end;

in this embodiment, optionally, the resources in the first candidate resource subset for sidelink are within an activation time of at least one receiving end may be: the resources in the first sidelink candidate resource subset are in the activation time of all the receiving ends, or the resources in the first sidelink candidate resource subset are in the activation time of part of the receiving ends, or the resources in the first sidelink candidate resource subset are in the activation time of a certain receiving end (in this case, each receiving end may correspond to a first sidelink candidate resource subset).

Optionally, the resources in the second side link candidate resource subset are not in the activation time of at least one receiving end, which may be: the resources in the second side link candidate resource subset are not in the activation time of all the receiving ends, or the resources in the second side link candidate resource subset are not in the activation time of part of the receiving ends, or the activation time of a certain receiving end of the resources in the second side link candidate resource subset (in this case, each receiving end may correspond to a second side link candidate resource subset).

Step 42: the terminal selects target resources in the first side link candidate resource subset and/or the second side link candidate resource subset.

Optionally, the target resource is used for initial transmission and/or retransmission of the data packet.

In the embodiment of the application, when the higher layer selects the resources of the sidelink, the activation time of the receiving end is considered, so that the selected resources can be utilized to the greatest extent, and the problem that the selected resources cannot be used or cannot be received even if the receiving end is used due to the non-activation time of the receiving end is avoided.

In this embodiment, optionally, the activation time includes a current activation time and/or a possible activation time in the future.

Optionally, the current activation time includes at least one of:

a DRX continuous monitoring timer (DRX-onduration timer) running period, or a DRX continuous monitoring timer running period of a current DRX cycle;

during running DRX inactivity timer (DRX-inactivity timer);

during running DRX retransmission timer (DRX-retransmission timer);

a resource transmission position in the periodic transmission, or a resource transmission position of a current period in the periodic transmission;

channel state information (Channel State Information, CSI) is requested during the transmission time to the reception time of the channel state information report.

Optionally, the future possible activation time includes at least one of:

DRX continuous monitoring timer running period of non-current DRX cycle;

during the running period of a DRX inactivity timer which is not started currently;

during the running period of a DRX retransmission timer which is not started currently;

a resource transmission position of a non-current period in the periodic transmission;

the channel state information is transmitted from the transmission time to the reception time of the channel state information report.

In this embodiment, optionally, the selecting, by the terminal, a target resource in the first side link candidate resource subset and/or the second side link candidate resource subset includes at least one of:

Scheme one: the terminal selects target resources from the first side link candidate resource subset for the primary transmission and/or retransmission of the data packet, and selects target resources from the second side link candidate resource subset for the primary transmission and/or retransmission of the data packet;

in an embodiment of the present application, optionally, the first scheme includes one of the following:

1) The terminal selects target resources from the first side link candidate resource subset and the second side link candidate resource subset for primary transmission and retransmission of the data packet;

in this case, the higher layer may not distinguish the first and second sub-sets of side link candidate resources any more, but rather perform resource selection on the first and second sub-sets of side link candidate resources as a whole.

2) The terminal selects a target resource from the first side link candidate resource subset for initial transmission of the data packet, and selects a target resource from the second side link candidate resource subset for retransmission of the data packet.

Scheme II: the terminal only selects target resources from the first side link candidate resource subset for initial transmission and/or retransmission of the data packet;

scheme III: the terminal selects a target resource for initial transmission and/or retransmission of a data packet based on a current activation time of the receiving end in the first side link candidate resource subset, and selects a target resource for initial transmission and/or retransmission of a data packet based on a future possible activation time of the receiving end in the second side link candidate resource subset.

In this embodiment, optionally, the third aspect includes one of the following:

1) The terminal selects target resources for primary transmission of the data packet based on the current activation time of the receiving end in the first side link candidate resource subset, and selects target resources for primary transmission and/or retransmission of the data packet based on the possible future activation time of the receiving end in the second side link candidate resource subset;

2) The terminal selects target resources for initial transmission and retransmission of data packets based on the current activation time of the receiving end in the first side link candidate resource subset, and selects target resources for initial transmission and/or retransmission of data packets based on the future possible activation time of the receiving end in the second side link candidate resource subset.

Scheme IV: the terminal selects target resources for initial transmission and/or retransmission of the data packet based on the current activation time of the receiving end only in the first side link candidate resource subset and/or the second side link candidate resource subset.

Optionally, when the terminal selects the target resource in the first side link candidate resource subset, the number of the selected target resource is greater than or equal to N1, or the proportion of the selected target resource is greater than or equal to X1%; wherein N1 is a positive integer greater than or equal to 1.

And/or

And when the terminal selects the target resources in the second side link candidate resource subset, the number of the selected target resources is more than or equal to N2, or the proportion of the selected target resources is more than or equal to X2%. Wherein N2 is a positive integer greater than or equal to 1.

In this embodiment, optionally, the terminal selects a target resource from the first sidelink candidate resource subset only for initial transmission and/or retransmission of the data packet, and then further includes: if the selected resource in the first side link candidate resource subset cannot meet the preset condition, executing one of the following steps:

1) Selecting target resources from the first side link candidate resource subset and the second side link candidate resource subset for initial transmission and/or retransmission of the data packet;

2) Selecting a target resource from the first side link candidate resource subset for initial transmission of the data packet, and selecting a target resource from the second side link candidate resource subset for retransmission of the data packet;

3) Selecting target resources for initial transmission and/or retransmission of the data packet in the second side link candidate resource subset;

4) Triggering resource reselection.

Therefore, the problem that normal data transmission cannot be performed if the resources selected in the first side link candidate resource subset cannot meet the preset conditions can be avoided.

In this embodiment, optionally, the terminal selects a target resource from the first candidate resource subset for initial transmission and/or retransmission of the data packet, and selects a target resource from the second candidate resource subset for initial transmission and/or retransmission of the data packet, and then further includes:

and triggering resource reselection if the resources selected in the first side link candidate resource subset and/or the second side link candidate resource subset cannot meet the preset condition.

Therefore, the problem that normal data transmission cannot be performed if the resources selected in the first side link candidate resource subset and/or the second side link candidate resource subset cannot meet the preset conditions can be avoided.

In this embodiment, optionally, the terminal selects, based on the current activation time of the receiving end, only in the first sidelink candidate resource subset, a target resource for initial transmission and/or retransmission of the data packet, and then further includes:

If the selected resource in the first side link candidate resource subset cannot meet the preset condition, executing one of the following steps:

selecting target resources for initial transmission and/or retransmission of the data packet based on the current activation time of the receiving end in the second side link candidate resource subset;

selecting target resources for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the first sub-set of side link candidate resources;

selecting target resources for initial transmission and retransmission of data packets based on a future possible activation time of the receiving end in the first side link candidate resource subset and the second side link candidate resource subset;

selecting target resources for initial transmission and retransmission of data packets based on a future possible activation time of the receiving end in the second sub-set of side link candidate resources;

triggering resource reselection.

In this embodiment, optionally, the terminal selects, based on the current activation time of the receiving end, only the first side link candidate resource subset and the second side link candidate resource subset for initial transmission and/or retransmission of the data packet, or selects, based on the current activation time of the receiving end, only the second side link candidate resource subset for initial transmission and/or retransmission of the data packet, the terminal further includes:

If the resources selected in the first side link candidate resource subset and/or the second side link candidate resource subset cannot meet the preset condition, executing one of the following steps:

triggering resource reselection.

Therefore, the problem that normal data transmission cannot be performed if the resource selected based on the current activation time of the receiving end in the first side link candidate resource subset cannot meet the preset condition can be avoided.

In this embodiment, optionally, the selecting, by the terminal, a target resource in the first side link candidate resource subset and/or the second side link candidate resource subset includes:

When the terminal selects a target resource for a single data packet, the terminal selects the target resource according to one of a scheme I, a scheme II, a scheme III and a scheme IV, and selects the target resource according to one of the scheme I, the scheme II, the scheme III and the scheme IV when selecting the target resource for a plurality of data packets, and the scheme for selecting the target resource is different from the scheme for selecting the target resource for a single data packet.

In this embodiment of the present application, optionally, the selecting, by the terminal, a target resource in the first sidelink candidate resource subset and/or the second sidelink candidate resource subset includes one of:

when the terminal selects target resources for a single data packet, selecting target resources according to a scheme I, and when selecting target resources for a plurality of data packets, selecting target resources according to a scheme III or a scheme IV;

and when the terminal selects the target resource for a single data packet, selecting the target resource according to a scheme II, and when the terminal selects the target resource for a plurality of data packets, selecting the target resource according to a scheme III or a scheme IV.

In this embodiment, optionally, the preset condition includes at least one of the following:

the number of resources is less than or equal to a first threshold value;

The percentage of the number of resources is smaller than or equal to a second threshold value;

the interval between resources cannot meet the required value.

The percentage of the resources may be the number of resources in the first side link candidate resource subset, the number of resources in the second side link candidate resource subset, or the total number of resources in the first side link candidate resource subset and the second side link candidate resource subset.

In this embodiment, optionally, after the triggering resource reselection, the method further includes: and the terminal re-selects the side link candidate resources, acquires a new first side link candidate resource subset, or acquires a new first side link candidate resource subset and a new second side link candidate resource subset.

The method for selecting the side link resources in the present application is described below with reference to a specific application scenario.

In the first embodiment of the invention: scheme II

Step 1: the logical channels have data to arrive and the medium access control (Media Access Control, MAC) layer triggers the resource selection.

Step 2: the physical layer selects candidate resources and provides the selected candidate resources to the MAC layer. Wherein the candidate resources include a first subset of sidelink candidate resources that are within an activation time indicated by the MAC layer and a second subset of sidelink candidate resources that are within a deactivation time indicated by the MAC layer.

Step 3: the MAC layer randomly selects target resources for initial transmission and/or retransmission among the first subset of sidelink candidate resources. When the number of selectable resources in the first sub-set of sidelink candidate resources is smaller than a first threshold value, then additionally selecting resources for initial transmission and/or retransmission in the second sub-set of sidelink candidate resources.

The second embodiment of the invention: scheme two+scheme three

Step 1: the logical channel has data arriving and the MAC layer triggers the resource selection.

Step 3: the MAC layer randomly selects target resources for initial transmission and/or retransmission among the first subset of sidelink candidate resources. When the number of selectable resources in the first side link candidate resource subset is smaller than the first threshold value, the resources for initial transmission and/or retransmission are additionally selected in the second side link candidate resource subset, but the MAC layer needs to additionally determine whether the resources in the second side link candidate resource subset are in a possible future activation time, and if so, the target resources are selected in the second side link candidate resource subset.

The third embodiment of the invention: and when the terminal selects the target resource for a single data packet, selecting the target resource according to a scheme II, and when the terminal selects the target resource for a plurality of data packets, selecting the target resource according to a scheme III.

Step 3-1: if the MAC layer performs resource selection for a single packet (single MAC PDU), the target resource for the initial transmission and/or retransmission is randomly selected only among the first side link candidate resource subset.

Step 3-2: if the MAC layer performs resource selection for a plurality of data packets (multiple MAC PDUs), the terminal may select target resources for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the second side link candidate resource subset, in addition to selecting target resources for initial transmission and/or retransmission of data packets based on a current activation time of the receiving end in the first side link candidate resource subset.

According to the sidelink resource selection method provided by the embodiment of the application, the execution body can be the sidelink resource selection device. In the embodiment of the present application, a method for performing sidelink resource selection by a sidelink resource selection device is taken as an example, and the sidelink resource selection device provided in the embodiment of the present application is described.

Referring to fig. 5, the embodiment of the present application further provides a sidelink resource selection device 50, including:

an obtaining module 51, configured to obtain a first side link candidate resource subset and a second side link candidate resource subset, where resources in the first side link candidate resource subset are within an activation time of at least one receiving end, and resources in the second side link candidate resource subset are not within an activation time of at least one receiving end;

a selection module 52 is configured to select a target resource among the first and/or second sub-sets of sidelink candidate resources.

Optionally, the activation time includes a current activation time and/or a future possible activation time.

Optionally, the current activation time includes at least one of:

a DRX continuous monitoring timer running period, or a DRX continuous monitoring timer running period of a current DRX cycle;

during running DRX inactivity timer;

during running DRX retransmission timer;

Optionally, the future possible activation time includes at least one of:

DRX continuous monitoring timer running period of non-current DRX cycle;

Optionally, the selection module 52 includes at least one of the following sub-modules:

A first selection sub-module, configured to select a target resource using a scheme one, where the scheme one includes: selecting a target resource for initial transmission and/or retransmission of the data packet in the first side link candidate resource subset, and selecting a target resource for initial transmission and/or retransmission of the data packet in the second side link candidate resource subset;

the second selecting sub-module is configured to select a target resource according to a second scheme, where the second scheme includes: selecting target resources for initial transmission and/or retransmission of data packets only in the first side link candidate resource subset;

a third selection sub-module, configured to select a target resource using a scheme III, where the scheme III includes: a target resource is selected for initial transmission and/or retransmission of data packets based on a current activation time of the receiving end in the first sub-set of sidelink candidate resources, and a target resource is selected for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the second sub-set of sidelink candidate resources.

A fourth selection sub-module, configured to select a target resource according to a scheme four, where the scheme four includes: and selecting target resources for initial transmission and/or retransmission of the data packet based on the current activation time of the receiving end only in the first side link candidate resource subset and/or the second side link candidate resource subset.

Optionally, the selecting module 52 is configured to select, when selecting the target resource in the first candidate subset of sidelink resources, the number of resources of the selected target resource to be N1 or more, or the proportion of the selected target resource to be X1 or more; and/or

The selecting module 52 is configured to, when selecting the target resources in the second candidate resource subset, select the number of resources of the target resources to be equal to or greater than N2, or select the proportion of the target resources to be equal to or greater than X2%.

Optionally, the first scheme includes one of the following:

selecting target resources from the first side link candidate resource subset and the second side link candidate resource subset for initial transmission and retransmission of the data packet;

and selecting target resources from the first side link candidate resource subset for initial transmission of the data packet, and selecting target resources from the second side link candidate resource subset for retransmission of the data packet.

Optionally, the third aspect includes one of the following:

selecting target resources for initial transmission of the data packet based on the current activation time of the receiving end in the first side link candidate resource subset, and selecting target resources for initial transmission and/or retransmission of the data packet based on the possible future activation time of the receiving end in the second side link candidate resource subset;

Target resources are selected for initial transmission and retransmission of data packets based on a current activation time of the receiving end in the first side link candidate resource subset, and target resources are selected for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the second side link candidate resource subset.

Optionally, the selecting module 52 is further configured to select, only after the target resource is selected from the first candidate set of sidelink resources for initial transmission and/or retransmission of the data packet, if the selected resource in the first candidate set of sidelink resources fails to meet a preset condition, perform one of the following:

selecting target resources from the first side link candidate resource subset and the second side link candidate resource subset for initial transmission and/or retransmission of the data packet;

selecting a target resource from the first side link candidate resource subset for initial transmission of the data packet, and selecting a target resource from the second side link candidate resource subset for retransmission of the data packet;

selecting target resources for initial transmission and/or retransmission of the data packet in the second side link candidate resource subset;

triggering resource reselection.

Optionally, the selecting module 52 is further configured to select a target resource from the first candidate set of sidelink resources for initial transmission and/or retransmission of the data packet, and after selecting the target resource from the second candidate set of sidelink resources for initial transmission and/or retransmission of the data packet, trigger a resource reselection if the selected resource in the first candidate set of sidelink resources and/or the second candidate set of sidelink resources fails to meet a preset condition.

Optionally, the selecting module 52 is further configured to perform, only after selecting, based on the current activation time of the receiving end, the target resource in the first sidelink candidate resource subset for initial transmission and/or retransmission of the data packet, if the selected resource in the first sidelink candidate resource subset cannot meet the preset condition, one of the following:

triggering resource reselection.

Optionally, the selecting module 52 is further configured to select, based on the current activation time of the receiving end, only the target resource for the initial transmission and/or retransmission of the data packet in the first side link candidate resource subset and the second side link candidate resource subset, or, after selecting, based on the current activation time of the receiving end, the target resource for the initial transmission and/or retransmission of the data packet in the second side link candidate resource subset, if the resources selected in the first side link candidate resource subset and/or the second side link candidate resource subset cannot meet the preset condition, perform one of the following:

triggering resource reselection.

Optionally, the selecting module 52 further includes:

and a fifth selection sub-module, configured to select a target resource according to one of the first, second, third and fourth schemes when selecting the target resource for an individual one of the data packets, and select the target resource according to one of the first, second, third and fourth schemes when selecting the target resource for a plurality of the data packets, where the scheme for selecting the target resource is different from the scheme for selecting the target resource for an individual one of the data packets.

Optionally, the fifth selecting sub-module is configured to select the target resource according to the scheme one when the terminal selects the target resource for a single data packet, and select the target resource according to the scheme three or the scheme four when the terminal selects the target resource for a plurality of data packets;

Or alternatively, the process may be performed,

and a fifth selection sub-module, configured to select the target resource according to the scheme II when selecting the target resource for a single data packet, and select the target resource according to the scheme III or the scheme IV when selecting the target resource for a plurality of data packets.

Optionally, the preset condition includes at least one of: the number of resources is less than or equal to a first threshold value; the percentage of the number of resources is smaller than or equal to a second threshold value; the interval between resources cannot meet the required value.

Optionally, the sidelink resource selection device 50 further includes:

and the reselection module is used for reselecting the side link candidate resources after triggering the resource reselection, and acquiring a new first side link candidate resource subset or acquiring a new first side link candidate resource subset and a new second side link candidate resource subset.

The sidelink resource selection device in the embodiment of the application may be an electronic device, for example, an electronic device with an operating system, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The sidelink resource selection device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 4, and achieve the same technical effects, so that repetition is avoided, and no further description is provided herein.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a terminal 60, including a processor 61 and a memory 62, where the memory 62 stores a program or an instruction that can be executed on the processor 61, and the program or the instruction implements each step of the foregoing embodiment of the sidelink resource selection method when executed by the processor 601, and the steps achieve the same technical effects, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for acquiring a first side link candidate resource subset and a second side link candidate resource subset, wherein the resources in the first side link candidate resource subset are in the activation time of at least one receiving end, and the resources in the second side link candidate resource subset are not in the activation time of at least one receiving end; selecting a target resource from the first and/or second sub-sets of sidelink candidate resources. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 7 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 70 includes, but is not limited to: at least some of the components of the radio frequency unit 71, the network module 72, the audio output unit 73, the input unit 74, the sensor 75, the display unit 76, the user input unit 77, the interface unit 78, the memory 79, the processor 710, and the like.

Those skilled in the art will appreciate that the terminal 70 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor x 10 by a power management system to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 74 may include a graphics processing unit (Graphics Processing Unit, GPU) 741 and a microphone 742, with the graphics processor 741 processing image data for still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 76 may include a display panel 761, and the display panel 761 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 77 includes at least one of a touch panel 771 and other input devices 772. The touch panel 771 is also referred to as a touch screen. The touch panel 771 may include two parts, a touch detection device and a touch controller. Other input devices 772 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment, after receiving the downlink data from the network side device, the radio frequency unit 71 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 71 may send uplink data to the network side device. Typically, the radio frequency unit 71 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 79 may be used to store software programs or instructions as well as various data. The memory 79 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 79 may include volatile memory or nonvolatile memory, or the memory 79 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 79 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The processor 710 is configured to obtain a first side link candidate resource subset and a second side link candidate resource subset, where resources in the first side link candidate resource subset are within an activation time of at least one receiving end, and resources in the second side link candidate resource subset are not within an activation time of at least one receiving end; selecting a target resource from the first and/or second sub-sets of sidelink candidate resources.

Optionally, the current activation time includes at least one of:

during running DRX inactivity timer;

during running DRX retransmission timer;

Optionally, the future possible activation time includes at least one of:

DRX continuous monitoring timer running period of non-current DRX cycle;

the channel state information is transmitted from the transmission time to the reception time of the channel state information report. Optionally, the processor 710 is configured to perform at least one of the following operations:

Selecting a target resource using scheme one, the scheme one comprising: selecting a target resource for initial transmission and/or retransmission of the data packet in the first side link candidate resource subset, and selecting a target resource for initial transmission and/or retransmission of the data packet in the second side link candidate resource subset;

selecting a target resource by adopting a scheme II, wherein the scheme II comprises the following steps: selecting target resources for initial transmission and/or retransmission of data packets only in the first side link candidate resource subset;

selecting a target resource by adopting a scheme III, wherein the scheme III comprises the following steps: selecting target resources for initial transmission and/or retransmission of data packets based on a current activation time of the receiving end in the first side link candidate resource subset, and selecting target resources for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the second side link candidate resource subset;

Optionally, the processor 710 is configured to select, when selecting a target resource in the first candidate resource subset, the number of resources of the selected target resource to be N1 or more, or the proportion of the selected target resource to be X1 or more; and/or

The processor 710 is configured to select, when a target resource is selected in the second candidate subset of sidelink resources, a number of resources of the selected target resource to be N2 or more, or a proportion of the selected target resource to be X2 or more.

Optionally, the first scheme includes one of the following:

Optionally, the third aspect includes one of the following:

Optionally, the processor 710 is further configured to select, only after the target resource is selected in the first candidate set of sidelink resources for initial transmission and/or retransmission of the data packet, if the selected resource in the first candidate set of sidelink resources fails to meet a preset condition, perform one of the following:

triggering resource reselection.

Optionally, the processor 710 is further configured to select a target resource from the first candidate set of sidelink resources for initial transmission and/or retransmission of the data packet, and trigger resource reselection if the selected resource in the first candidate set of sidelink resources and/or the second candidate set of sidelink resources fails to meet a preset condition after selecting the target resource from the second candidate set of sidelink resources for initial transmission and/or retransmission of the data packet.

Optionally, the processor 710 is further configured to select, only after the target resource is selected for the initial transmission and/or retransmission of the data packet based on the current activation time of the receiving end in the first sidelink candidate resource subset, if the selected resource in the first sidelink candidate resource subset cannot meet the preset condition, perform one of the following:

triggering resource reselection.

Optionally, the processor 710 is further configured to select, based on the current activation time of the receiving end, only the target resource for the initial transmission and/or retransmission of the data packet in the first side link candidate resource subset and the second side link candidate resource subset, or, after selecting, based on the current activation time of the receiving end, the target resource for the initial transmission and/or retransmission of the data packet in the second side link candidate resource subset, only the terminal performs one of the following if the selected resources in the first side link candidate resource subset and/or the second side link candidate resource subset cannot meet a preset condition:

triggering resource reselection.

Optionally, the processor 710 is further configured to select the target resource according to one of the first scheme, the second scheme, the third scheme, and the fourth scheme when selecting the target resource for the single data packet, select the target resource according to one of the first scheme, the second scheme, the third scheme, and the fourth scheme when selecting the target resource for the plurality of data packets, and select the target resource in a scheme different from the scheme for selecting the target resource for the single data packet.

Optionally, the processor 710 is configured to select the target resource according to the scheme one when the terminal selects the target resource for a single data packet, and select the target resource according to the scheme three or the scheme four when the terminal selects the target resource for a plurality of data packets;

Or alternatively, the process may be performed,

the processor 710 is configured to select the target resource according to the second scheme when selecting the target resource for a single packet, and select the target resource according to the third scheme or the fourth scheme when selecting the target resource for a plurality of packets.

Optionally, the processor 710 is further configured to, after the triggering the reselection of the resource, re-perform selection of the sidelink candidate resource, obtain a new first sidelink candidate resource subset, or obtain a new first sidelink candidate resource subset and a new second sidelink candidate resource subset.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the processes of the foregoing embodiments of the sidelink resource selection method are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction, implement each process of the above embodiment of the sidelink resource selection method, and achieve the same technical effect, so that repetition is avoided, and no further description is given here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the foregoing embodiments of the sidelink resource selection method, and achieve the same technical effects, so that repetition is avoided and details are not repeated herein.

It should be noted that, in this document, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. In addition, the embodiments and the schemes in the present application may be implemented separately or may be implemented together in any combination, which is not limited in this application.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A method of sidelink resource selection, comprising:

2. The method according to claim 1, wherein the activation time comprises a current activation time and/or a future possible activation time.

3. The method of claim 2, wherein the current activation time comprises at least one of:

discontinuous reception DRX continues to monitor the timer run period, or DRX of the present DRX cycle continues to monitor the timer run period;

during running DRX inactivity timer;

during running DRX retransmission timer;

4. The method of claim 2, wherein the future possible activation time comprises at least one of:

DRX continuous monitoring timer running period of non-current DRX cycle;

5. The method according to claim 2, wherein the terminal selects a target resource among the first and/or second sub-set of sidelink candidate resources, comprising at least one of:

Scheme III: the terminal selects target resources for initial transmission and/or retransmission of the data packet based on the current activation time of the receiving end in the first side link candidate resource subset, and selects target resources for initial transmission and/or retransmission of the data packet based on the possible future activation time of the receiving end in the second side link candidate resource subset;

6. The method of claim 5, wherein the step of determining the position of the probe is performed,

when the terminal selects target resources in the first side link candidate resource subset, the number of the selected target resources is greater than or equal to N1, or the proportion of the selected target resources is greater than or equal to X1%;

and/or

And when the terminal selects the target resources in the second side link candidate resource subset, the number of the selected target resources is more than or equal to N2, or the proportion of the selected target resources is more than or equal to X2%.

7. The method of claim 5, wherein the first aspect comprises one of:

The terminal selects target resources from the first side link candidate resource subset and the second side link candidate resource subset for primary transmission and retransmission of the data packet;

the terminal selects a target resource from the first side link candidate resource subset for initial transmission of the data packet, and selects a target resource from the second side link candidate resource subset for retransmission of the data packet.

8. The method of claim 5, wherein the third aspect comprises one of:

the terminal selects target resources for primary transmission of the data packet based on the current activation time of the receiving end in the first side link candidate resource subset, and selects target resources for primary transmission and/or retransmission of the data packet based on the possible future activation time of the receiving end in the second side link candidate resource subset;

the terminal selects target resources for initial transmission and retransmission of data packets based on the current activation time of the receiving end in the first side link candidate resource subset, and selects target resources for initial transmission and/or retransmission of data packets based on the future possible activation time of the receiving end in the second side link candidate resource subset.

9. The method according to claim 5, wherein the terminal selects target resources for initial transmission and/or retransmission of data packets only in the first subset of sidelink candidate resources, further comprising thereafter:

triggering resource reselection.

10. The method according to claim 5, wherein the terminal selects a target resource for the initial transmission and/or retransmission of the data packet in the first subset of sidelink candidate resources, and selects a target resource for the initial transmission and/or retransmission of the data packet in the second subset of sidelink candidate resources, and further comprising:

11. The method according to claim 5, wherein the terminal selects target resources for initial transmission and/or retransmission of data packets based on the current activation time of the receiving end only in the first subset of sidelink candidate resources, further comprising:

Triggering resource reselection.

12. The method according to claim 5, wherein the terminal selects target resources for initial transmission and/or retransmission of data packets based on the current activation time of the receiving end only in the first and second sub-sets of side link candidate resources, or wherein the terminal selects target resources for initial transmission and/or retransmission of data packets based on the current activation time of the receiving end only in the second sub-set of side link candidate resources, further comprising:

Triggering resource reselection.

13. The method according to claim 5, wherein the terminal selects a target resource among the first and/or second sub-set of sidelink candidate resources, comprising:

14. The method according to claim 13, wherein the terminal selects a target resource among the first and/or second sub-set of sidelink candidate resources, comprising one of:

15. The method according to any one of claims 9-12, wherein the preset conditions comprise at least one of: the number of resources is less than or equal to a first threshold value; the percentage of the number of resources is smaller than or equal to a second threshold value; the interval between resources cannot meet the required value.

16. The method according to any of claims 9-12, wherein after triggering the resource reselection further comprises:

and the terminal re-selects the side link candidate resources, acquires a new first side link candidate resource subset, or acquires a new first side link candidate resource subset and a new second side link candidate resource subset.

17. A sidelink resource selection device, comprising:

18. The apparatus of claim 17, wherein the activation time comprises a current activation time and/or a future possible activation time.

19. The apparatus of claim 18, wherein the selection module comprises at least one of the following sub-modules:

a third selection sub-module, configured to select a target resource using a scheme III, where the scheme III includes: selecting target resources for initial transmission and/or retransmission of data packets based on a current activation time of the receiving end in the first side link candidate resource subset, and selecting target resources for initial transmission and/or retransmission of data packets based on a future possible activation time of the receiving end in the second side link candidate resource subset;

20. The apparatus of claim 19, wherein the selection module further comprises:

21. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the sidelink resource selection method of any of claims 1-16.

22. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the sidelink resource selection method of any of claims 1-16.