CN116471574A

CN116471574A - Method, device and base station for selecting through link resources

Info

Publication number: CN116471574A
Application number: CN202210010492.7A
Authority: CN
Inventors: 温小然; 赵锐
Original assignee: CICTCI Technology Co Ltd
Current assignee: CICTCI Technology Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2023-07-21

Abstract

The invention provides a method, a device and a base station for selecting through link resources, wherein the method is applied to the base station and comprises the following steps: when the resource scheduling is performed for the first terminal, at least one of the following target processing operations is performed: determining a value of a first timer of the second terminal according to the first information, wherein the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface; determining a sending time unit of the downlink control information according to the second information; the first information relates to at least one of the following: relevant parameters of resource scheduling; discontinuous reception configuration of a cellular communication interface of a first terminal; the second information relates to at least one of the following information: relevant parameters of resource scheduling; DRX configuration of a cellular communication interface of the first terminal; DRX configuration of a direct link communication interface of the second terminal; and (5) configuring a resource pool. The invention can improve the reliability of the transmission of the direct link service.

Description

Method, device and base station for selecting through link resources

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a base station for selecting a direct link resource.

Background

The existing direct link (SL) mode 1 (mode-1) resource allocation method is based on the always-on scenario of the terminal, that is, the direct link user equipment UE maintains a radio resource control (Radio Resource Control, RRC) connection state with the cellular network, and the base station allocates direct link transmission resources in a pre-configured or cellular network configured mode-1 resource pool according to the service characteristics of the direct link reported by the UE. However, for the UE configured with the discontinuous reception mechanism, in order to achieve the purpose of terminal power saving, the UE only performs periodic channel listening, and in a period in which listening is not configured, the UE may enter a power saving mode without listening. If the transmitting device (TX UE) configures a Uu discontinuous reception (Discontinuous Reception, abbreviated as DRX) mechanism, if the base station does not consider the Uu DRX configuration of the TX UE when transmitting downlink control information (Downlink Control Information, abbreviated as DCI), the TX UE may not successfully receive the DCI, so that a through link transmission cannot be performed; if the receiving device (RX UE) configures the SL DRX mechanism, it may result in the receiving device (RX UE) not being able to receive the mode-1 transmission resources if the base station does not consider the RX UE's cut-through link DRX configuration when scheduling cut-through link resources. Both of the above conditions affect the reliability of the through link traffic transmission.

Disclosure of Invention

The invention provides a method, a device and a base station for selecting through link resources, which solve the problem that the reliability of through link service transmission is affected in the existing resource allocation mechanism based on a through link mode 1.

In a first aspect, an embodiment of the present invention provides a method for selecting a through link resource, which is applied to a base station, and includes:

executing target processing operation when carrying out resource scheduling for the first terminal;

the performing a target processing operation includes at least one of:

determining a value of a first timer of the second terminal according to first information, wherein the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface;

determining a sending time unit of the downlink control information according to the second information;

wherein the first information relates to at least one of the following information:

relevant parameters of resource scheduling;

discontinuous reception configuration of a cellular communication interface of the first terminal;

wherein the second information relates to at least one of the following information:

relevant parameters of resource scheduling;

discontinuous reception, DRX, configuration of a cellular communication interface of the first terminal;

DRX configuration of a direct link communication interface of the second terminal;

and (5) configuring a resource pool.

In a second aspect, an embodiment of the present invention provides a base station, including: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the through link resource selection method according to the first aspect when the computer program is executed.

In a third aspect, an embodiment of the present invention provides a through link resource selection device, applied to a base station, including:

the processing module is used for executing target processing operation when the resource scheduling is carried out for the first terminal;

the performing a target processing operation includes at least one of:

relevant parameters of resource scheduling;

DRX configuration of a cellular communication interface of the first terminal;

and (5) configuring a resource pool.

In a fourth aspect, an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of the through link resource selection method according to the first aspect.

The technical scheme of the invention has the beneficial effects that:

in the above scheme, when the base station performs resource scheduling for the first terminal, determining the value of the direct link discontinuous reception hybrid automatic retransmission round trip time timer of the direct link communication interface of the second terminal by executing the first information; and/or determining a sending time unit of the downlink control information according to the second information; and the first information is related to at least one of a parameter related to resource scheduling, a discontinuous reception configuration of a cellular communication interface of the first terminal; the second information relates to at least one of a parameter related to resource scheduling, a discontinuous reception, DRX, configuration of a cellular communication interface of the first terminal, a DRX configuration of a through link communication interface of the second terminal, a configuration of a resource pool. The problem that the reliability of the transmission of the direct link service is affected due to the fact that the first terminal cannot successfully receive DCI and the second terminal cannot receive transmission resources can be avoided.

Drawings

FIG. 1 shows a schematic diagram of a discontinuous reception process;

fig. 2 is a flowchart of a method for selecting a communication link resource according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing the timing relationship of resources according to an embodiment of the present invention;

FIG. 4 is a diagram showing a second timing relationship of resources according to an embodiment of the present invention;

FIG. 5 is a third schematic diagram of the timing relationship of resources according to an embodiment of the present invention;

FIG. 6 is a diagram showing a timing relationship of resources according to an embodiment of the present invention;

FIG. 7 is a diagram showing a timing relationship of resources according to an embodiment of the present invention;

FIG. 8 is a diagram showing a timing relationship of resources according to an embodiment of the present invention;

FIG. 9 is a diagram of a timing relationship of resources according to an embodiment of the present invention;

fig. 10 is a block diagram showing the configuration of a communication link resource selection device according to an embodiment of the present invention;

fig. 11 is a block diagram showing the structure of a base station according to the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the examples provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, and it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The following first describes what the scheme provided in the embodiments of the present application relates to.

1. Direct link mode 1 (Sidelink mode-1) resource allocation method

In the method for allocating the resources of the sidelink mode-1, the UE and the cellular network are required to be in a radio resource control (Radio Resource Control, RRC for short) connection state, the base station allocates SL transmission resources in a mode-1 resource pool configured by the cellular network according to the business characteristics of the through link reported by the UE, and the transmitting equipment (TX UE) is scheduled to perform the retransmission of the through link according to the ACK/NACK (acknowledgement/negative acknowledgement) information of the mixed automatic retransmission request (Hybrid Automatic Repeat reQuest, HARQ for short) of the through link reported by the UE. The direct link mode-1 resource allocation introduces 3 scheduling modes of uplink transmission in NR Uu, including:

1. dynamic scheduling: for non-periodic traffic, the information such as transmission resources of a physical direct link control channel (Physical SideLink control channel, abbreviated PSCCH) and a physical direct link shared channel (Physical SideLink Shared Channel, abbreviated PSSCH) and feedback resources of a related physical uplink control channel (Physical Uplink Control Channel, abbreviated PUCCH) is indicated by downlink control information (Downlink Control Information, abbreviated DCI).

2. Configuration authorization type 1: mainly for periodic traffic, index of grant type 1, PSCCH and PSSCH transmission resources and transmission period, and relevant PUCCH feedback resources are configured through RRC signaling configuration indication. The activation and release of the resources of configuration grant type 1 is controlled by RRC signaling.

3. Configuration authorization type 2: also for periodic traffic, parameters such as index of configuration grant type 2, transmission period of PSCCH and PSSCH are configured through RRC signaling, but corresponding grant configuration information is activated and released through DCI, wherein ship speed resources of PSCCH and PSSCH and relevant PUCCH feedback resource information are carried through DCI signaling for activating current configuration grant.

2. Discontinuous Reception (DRX)

In a mobile communication system based on a shared channel, such as LTE (Long Term Evolution ), transmission of uplink and downlink data is controlled by a base station (eNB) scheduler, which, when determining to schedule a user, will inform the terminal on what resources to send or receive data through a control channel. A terminal (UE) listens to a control channel, and when detecting that the control channel contains scheduling information of the terminal (UE), the terminal completes data transmission (uplink) or data reception (downlink) according to an instruction on the control channel. In the active state, since the terminal does not determine when the eNB schedules it, one common operation mode is that the terminal continuously listens to the control channel, and parses each subframe including its downlink scheduling control channel to determine whether it is scheduled. This way of operation achieves higher efficiency in situations where the amount of terminal data is large, and possibly frequently scheduled. However, for some services, the arrival frequency of the data is low, so that the number of times the terminal is scheduled is also small, and if the terminal still continuously listens to the control channel, the power consumption of the terminal is certainly increased. In order to solve the power consumption problem, the LTE system adopts a DRX operation mode, as shown in fig. 1, in which a terminal periodically monitors a control channel, thereby achieving the purpose of saving power.

Specifically, in NR-V2X, considering that Pedestrian user equipment (Pederstrian-UE, P-UE for short) also has service receiving requirements, DRX characteristics are introduced for sidelink in order to solve the problem of power consumption caused by continuous P-UE reception.

In particular, the DRX mechanism of the Uu port (cellular network communication interface) takes into account the arrival model of the data traffic, i.e. the arrival of data packets is bursty (it is understood that once there are data packets arriving, more packets arrive consecutively in a shorter time). In order to adapt to the service arrival characteristics, the Uu DRX process adopts various timers and is combined with the HARQ process so as to achieve better power saving performance.

3. Uu DRX related timer

1. The drx-onDurationTimer is the time when the UE periodically wakes up to listen to the control channel, as shown in fig. 1;

2. drx-SlotOffset, delay before drx-ondurationTimer is started.

3. The PDCCH indicates the duration time after the MAC entity performs new uplink UL or downlink DL transmission; (it is considered that in most cases, after a UE is scheduled and receives or transmits data in a certain subframe, it is likely to continue to be scheduled in the next few subframes).

4. drx-retransmission timer DL (each DL HARQ process except for broadcast), the maximum duration before a DL retransmission is received.

5. drx-retransmission timer UL (per UL HARQ process) the maximum duration before UL retransmission authorization is obtained.

6. DRX-longcycle offset, which represents the two-layer meaning of both Long DRX cycle and DRX-StartOffset, represents the Long period duration employed by DRX (if the network side is also configured with the short period parameter DRX-short cycle, then the Long period must be configured as an integer multiple of the short period), and DRX-StartOffset defines the Long and short DRX cycle start subframes.

7. DRX-short cycle (optional) short cycle duration employed by DRX.

8. DRX-short cycle timer (optional) the UE uses the duration of the DRX short cycle.

9. drx-HARQ-RTT-TimerDL (each DL HARQ process except for broadcast), the minimum duration before DL allocation for HARQ retransmission is expected by the MAC entity.

10. drx-HARQ-RTT-TimerUL (per UL HARQ process) the minimum duration before the MAC entity expects UL HARQ retransmission grant.

11. In order that the UE configured with Uu DRX may receive mode-1 scheduling information, the Uu DRX further introduces HARQ RTT Timer and HARQ retransmission Timer specific to the through link, including:

drx-HARQ-RTT-TimerSL (per HARQ process): the MAC entity expects a minimum duration before the through link retransmission grant.

drx-retransmission timer sl (per HARQ process): the maximum duration before the cut-through link retransmission grant is obtained.

4. SL DRX related timer

Similar to Uu DRX, SL DRX also employs various timers including:

1. the sl-drx-onDurationTimer is the time when the UE periodically wakes up to listen to the control channel.

2. sl-drx-SlotOffset: delay before starting sl-drx-onduration timer.

3. The SL-drx-InactigitTimer (except for broadcast transmissions) is that SCI (i.e., 1st stage SCI and 2nd stage SCI) indicates the duration after the MAC entity makes a new SL transmission.

4. SL-drx-retransmission timer (each SL HARQ process except for broadcast) is the maximum duration before the SL retransmission is received.

5. sl-drx-StartOffset: the starting symbol/slot of the SL DRX cycle is defined.

6. sl-drx-Cycle: SL DRX cycle.

7. SL-drx-HARQ-RTT-Timer (each SL HARQ process except for broadcast), the minimum duration before the SL HARQ retransmission expected by the MAC entity.

5. Definition of activation time under DRX

At present, SL DRX has determined that in SL-DRX-onDurationTimer, SL-DRX-InactivityTimer and SL-DRX-retransmission Timer, either timer is running, the UE will monitor PSCCH and two-phase SCI (2 nd SCI). The time the UE listens to PSCCH and 2nd SCI is also called activation time.

The invention will now be described by way of specific examples.

Specifically, the embodiment of the invention provides a method and a device for selecting through link resources and a base station, which solve the problem that the reliability of through link service transmission is affected in the existing resource allocation method based on a through link mode 1.

First embodiment

As shown in fig. 2, an embodiment of the present invention provides a method for selecting a through link resource, which specifically includes the following steps:

step 101: and executing target processing operation when the resource scheduling is carried out for the first terminal, wherein the execution target processing operation comprises at least one of the following operations:

processing operation 1: determining a value of a first timer of the second terminal according to first information, wherein the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface;

processing operation 2: determining a sending time unit of the downlink control information according to the second information;

the transmission time unit may be a transmission subframe, a transmission slot, a transmission symbol, or the like.

relevant parameters of resource scheduling;

and (5) configuring a resource pool.

As a specific application scenario, the second terminal in this embodiment is a receiving end of the first terminal, and the base station performs direct link mode 1 (sidelink mode-1) resource scheduling for the first terminal.

In this embodiment, when resource scheduling is performed for the first terminal, by setting a value of a direct link discontinuous reception hybrid automatic repeat round trip time Timer (sl-drx-HARQ-RTT-Timer) of a direct link communication interface of the second terminal based on the first information and/or setting a transmission time unit of downlink control information based on the second information, transmission corresponding to the direct link grant is enabled to be within an activation time of the second terminal, so that the second terminal can be guaranteed to receive transmission resources and the downlink control information, and reliability of direct link transmission is improved.

The above-described processing operation 1 and processing operation 2 are described below, respectively.

It is noted that the TX UE (transmitting device) referred to hereinafter and in fig. 4 to 9 refers to a first terminal and the RX UE (receiving device) refers to a second terminal. The sl-drx-HARQ-RTT-Timer is a first Timer, and the drx-HARQ-RTT-Timer SL is a second Timer.

1. With respect to processing operation 1

In a specific embodiment, the first information includes at least one of the following 5 items:

item 1: a first time interval, the first time interval being a time interval between a physical through link feedback channel and a physical uplink control channel resource.

Wherein the first time interval may be indicated by DCI or configured by RRC signaling.

As shown in fig. 3, the time interval between the physical through link feedback channel PSFCH and the physical uplink control channel PUCCH resource represents the time interval between the time when the second terminal receives the ACK/NACK information of the through link and the time when the through link ACK/NACK is reported to the base station through the PUCCH.

Item 2: a value of a second timer of the first terminal, the second timer being a discontinuous reception hybrid automatic repeat-round trip time timer (drx-HARQ-RTT-TimerSL) of a cellular communication interface.

Wherein the value of the second timer may be determined according to the cellular communication interface Uu DRX configuration of the first terminal.

Item 3: and the second time interval is the time interval between the downlink control information and the transmission of the through link.

Wherein the second time interval may be indicated by DCI.

Item 4: the time domain starting position of the transmission resource of the through link.

Wherein the time domain starting position of the through link transmission resource represents a slot offset value of 0 with respect to a System Frame Number (SFN). The time domain starting position of the through link transmission resource may be configured by RRC signaling.

Item 5: resource periods.

Wherein the resource period is used to indicate that the currently configured resource is recurring at a given period. The resource period may be indicated by DCI or configured by RRC signaling.

Wherein, the PSCCH/PSSCH time-frequency resource indication information in fig. 3 is used to indicate one or more PSCCH/PSSCH transmission resources in one resource period, and these transmission resources can only be used for initial transmission and retransmission of the same data.

In a specific embodiment, the determined value of the first timer of the second terminal includes one of the following cases:

case 1:

the value of the first timer of the second terminal is greater than or equal to a first value; wherein the first value is the sum of the values of the first time interval and the second timer;

In this case, the value of the first Timer (sl-drx-HARQ-RTT-Timer) is set to be greater than or equal to the sum of the value of the first time interval (time interval between PSFCH and PUCCH resource) and the second Timer (drx-HARQ-RTT-Timer sl of the first terminal).

For example, referring to fig. 4, a base station or a first terminal (finger TX UE) may determine a time interval between PSFCH and PUCCH resources according to DCI indication or RRC signaling configuration; the value of DRX-HARQ-RTT-timer sl of the TX UE may be determined according to the Uu DRX configuration of the TX UE. Because the RX UE starts the sl-drx-HARQ-RTT-Timer after completing the transmission fed back on the PSFCH, and does not monitor SCI any more, the TX UE starts the drx-HARQ-RTT-TimerSL after completing the transmission fed back on the PUCCH, and does not monitor downlink control information DCI any more. That is, the TX UE does not send a retransmission to the RX UE until the drx-HARQ-RTT-TimerSL times out. Therefore, to ensure that the RX UE can receive the through link transmission, and that the second terminal (referred to as the receiving device RX UE) can achieve a sufficient power saving effect, the sl-drx-HARQ-RTT-Timer may be configured to be greater than or equal to the sum of the first time interval (the time interval between the PSFCH and the PUCCH resource) and the value of the drx-HARQ-RTT-Timer sl of the TX UE, so that the RX UE is in the power saving state before the drx-HARQ-RTT-Timer sl of the TX UE times out.

Case 2:

the value of the first timer of the second terminal is greater than or equal to a second value; wherein the second value is the sum of the first time interval, the value of the second timer and the second time interval.

In this case, the value of the first Timer (sl-drx-HARQ-RTT-Timer) of the second terminal is set to be greater than or equal to the sum of the first time interval (time interval between PSFCH and PUCCH resource), the value of the second Timer (drx-HARQ-RTT-Timer sl of the first terminal), and the second time interval (time interval between DCI and through link transmission).

For example, referring to fig. 5, for the through link mode-1 dynamic scheduling and configuration grant type 2, the DCI may indicate a Time interval (Time gap) for DCI to through link transmission. In this case, as shown in fig. 5, the base station or TX UE may determine a time interval between PSFCH and PUCCH resources according to the DCI indication; and determining the value of the DRX-HARQ-RTT-TimerSL of the TX UE according to the Uu DRX configuration of the TX UE. The RX UE starts the SL-drx-HARQ-RTT-Timer after finishing the transmission fed back on PSFCH, and does not monitor SCI any more, the TX UE starts the drx-HARQ-RTT-TimerSL after finishing the transmission fed back on PUCCH, and does not monitor DCI any more, after the drx-HARQ-RTT-TimerSL is overtime, starts the drx-retransmission TimerSL, and starts monitoring DCI again, after receiving DCI, the TX UE determines the resource for SL transmission according to the value of the Time gap indicated in DCI, and transmits on the corresponding resource.

Thus, in this case, the TX UE does not send retransmissions to the RX UE until the DCI indicates the resources for SL transmission. To ensure that the RX UE can receive the through link transmission and that the RX UE can achieve a sufficient power saving effect, the RX UE can be guaranteed to receive the through link transmission by configuring the SL-drx-HARQ-RTT-Timer to be greater than or equal to the sum of the first time interval (the time interval between the PSFCH and the PUCCH resource), the value of the drx-HARQ-RTT-Timer SL of the TX UE, and the second time interval (the time interval between the DCI and the SL transmission), and to make the RX UE in a power saving state before the TX UE sends the retransmission.

2. With respect to operation 2

In a specific embodiment, the second information includes at least one of:

item 1: the base station receives the time of transmission on the physical uplink control channel.

Item 2: and the value of a first timer currently activated by the second terminal, wherein the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface.

Item 3: a first time interval, the first time interval being a time interval between a physical through link feedback channel and a physical uplink control channel resource.

The first time interval may be indicated by DCI or configured by RRC signaling, and is used to represent a time interval between a time when the TX UE receives the SL ACK/NACK information and a time when the SL ACK/NACK is reported to the base station through the PUCCH.

Item 4: the physical through link in the resource pool feeds back the location of the channel resources.

Item 5: the last through link transmission position indicated by the last downlink control information.

Item 6: the value of a second timer currently activated by the first terminal, the second timer being a discontinuous reception hybrid automatic repeat-round trip time timer of a cellular communication interface.

Wherein the value of the second timer may be determined according to the Uu DRX configuration of the TX UE.

Item 7: and the second time interval is the time interval between the downlink control information and the transmission of the through link.

Wherein the second time interval may be indicated by DCI.

Item 8: the time domain starting position of the transmission resource of the through link.

Wherein the time domain start position represents a slot offset value of 0 with respect to a System Frame Number (SFN), which is configurable by RRC signaling.

Item 9: resource periods.

Wherein, the resource period is used for indicating the current configured resource to repeatedly appear in a given period, and can be indicated by DCI or configured by RRC signaling.

Further, in a specific embodiment, the determined transmission time unit of the downlink control information includes at least one of the following cases:

case 1:

and the sending time unit of the downlink control information is equal to the end time of the second timer currently activated by the first terminal.

Case 2:

and the sending time unit of the downlink control information is after the end time of the second timer currently activated by the first terminal.

In cases 1 and 2 above, the transmission time unit of the DCI is equal to or later than the end time of the second timer (drx-HARQ-RTT-timer sl) currently activated by the first terminal (TX UE).

For example, referring to fig. 6, the base station may determine an end time of the drx-HARQ-RTT-timer sl currently activated by the first terminal according to a time when the PUCCH is received and a value of drx-HARQ-RTT-timer sl of the TX UE configured or preconfigured by the base station. Because the first terminal starts the drx-HARQ-RTT-timer sl after completing the transmission fed back on the PUCCH, the downlink control information DCI is not monitored any more, and starts the drx-retransmission timer sl after the drx-HARQ-RTT-timer is overtime, and starts the DCI monitoring again. Thus, to ensure that the TX UE can successfully receive the DCI, the base station should determine that the transmission time unit of the DCI is equal to or later than the end time of the drx-HARQ-RTT-timer sl currently activated by the TX UE.

Case 3:

and the sending time unit of the downlink control information is equal to the end time of the first timer currently activated by the second terminal.

Case 4:

and the sending time unit of the downlink control information is after the end time of the first timer currently activated by the second terminal.

In cases 3 and 4 above, the DCI transmission time unit is equal to or later than the end time of the first Timer (sl-drx-HARQ-RTT-Timer) currently activated by the second terminal (RX UE).

For example, referring to fig. 7, the base station may determine a start time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE according to a time when the PUCCH is received and a time interval between the PSFCH and the PUCCH resource, and may determine an end time of the sl-drx-HARQ-RTT-Timer according to a value of the sl-drx-HARQ-RTT-Timer configured to the RX UE by the base station.

Because the RX UE does not monitor SCI during the running period of the sl-drx-HARQ-RTT-Timer, in order to ensure that the RX UE can successfully receive the retransmission, the base station should determine that the DCI transmission time unit is equal to or later than the end time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE.

Additionally, in cases 3 and 4, if the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE is later than the end time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE, it should be preferentially ensured that the TX UE can receive the DCI, i.e., the base station should determine that the time unit of DCI transmission is equal to or later than the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE.

Case 5:

the time interval between the end time of the first timer currently activated by the second terminal and the sending time unit of the downlink control information is smaller than or equal to the second time interval;

referring to fig. 8, the base station may determine a start time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE according to a time when the PUCCH is received and a time interval between the PSFCH and the PUCCH resource, and may determine an end time of the sl-drx-HARQ-RTT-Timer according to a value of the sl-drx-HARQ-RTT-Timer configured to the RX UE by the base station.

Because the RX UE does not monitor SCI during the running period of the SL-drx-HARQ-RTT-Timer, to ensure that the RX UE can successfully receive the retransmission, the base station should determine that the direct link (SL) transmission scheduled by the DCI is equal to or later than the end time of the SL-drx-HARQ-RTT-Timer currently activated by the RX UE, that is, the time of the direct link transmission is: based on the sending time unit of the DCI, the end time of the sl-drx-HARQ-RTT-Timer which is equal to or later than the current activation of the RX UE after the value of the second time interval is deferred.

Additionally, in this case, if the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE is later than the end time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE, it should be preferentially ensured that the TX UE can receive the DCI, i.e., the base station should determine that the time unit of DCI transmission is equal to or later than the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE.

Case 6:

the determined transmission time unit of the downlink control information satisfies: taking a sending time unit of the downlink control information as a starting point, and deferring a time unit available for a first direct link after the second time interval, wherein the time unit is equal to the end time of a first timer currently activated by the second terminal;

it should be noted that the time units available for the through link may be a logical subframe, a logical slot, a logical symbol, a logical subframe in a resource pool, a logical slot in a resource pool, a logical symbol in a resource pool, and so on.

Case 7:

the determined transmission time unit of the downlink control information satisfies: and taking the sending time unit of the downlink control information as a starting point, and deferring the available time unit of the first direct link after the second time interval, wherein the available time unit is after the end time of the first timer currently activated by the second terminal.

The time units available for the through link may be a logical subframe, a logical slot, a logical symbol, a logical subframe in a resource pool, a logical slot in a resource pool, a logical symbol in a resource pool, and the like.

For the above cases 6 and 7, referring to fig. 9, the base station may determine the starting time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE according to the time when the PUCCH is received and the time interval between the PSFCH and the PUCCH resource, and may determine the ending time of the sl-drx-HARQ-RTT-Timer according to the value of the sl-drx-HARQ-RTT-Timer configured to the RX UE by the base station.

Since the RX UE does not monitor SCI during the running of the SL-drx-HARQ-RTT-Timer, to ensure that the RX UE can successfully receive the retransmission, the base station should determine that the DCI scheduled SL transmission is equal to or later than the end time of the SL-drx-HARQ-RTT-Timer currently activated by the RX UE, and considering that the DCI scheduled SL transmission can only be sent on the time unit available for the through link, the base station should determine that: and taking a time unit sent by the DCI as a starting point, and deferring the available time unit of the first straight-through link after the value of the second time interval to be equal to or later than the end time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE.

Additionally, in cases 6 and 7, if the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE is later than the end time of the sl-drx-HARQ-RTT-Timer currently activated by the RX UE, it should be preferentially ensured that the TX UE can receive the DCI, i.e., the base station should determine that the time unit of DCI transmission is equal to or later than the end time of the drx-HARQ-RTT-Timer sl currently activated by the TX UE.

Further, in an embodiment, after step 101, the method further includes:

transmitting the value of the first timer to the second terminal; and/or the number of the groups of groups,

and sending the DCI to the first terminal according to the sending time unit.

In the above embodiment, by making the serving base station of the TX UE performing mode-1 scheduling consider the relevant parameters of the TX UE for mode-1 scheduling and Uu DRX configuration of the TX UE when configuring SL DRX configuration for the RX UE, and configuring a proper value of SL HARQ RTT Timer for the RX UE, the RX UE can save power to the greatest extent; and, by making the serving base station of the TX UE performing mode-1 scheduling consider the SL DRX configuration of the RX UE when transmitting DCI to the TX UE, so that the transmission corresponding to the mode-1SL grant may be located in the DRX active time of the RX UE, reliability of mode-1 resource selection is ensured when the RX UE configures the SL DRX, and the method is more suitable for mode-1 resource scheduling and discontinuous reception operation of the sidelink UE having power saving requirements.

Second embodiment

As shown in fig. 10, the embodiment of the present invention further provides a through link resource selection device 1000, which is applied to a base station, and includes:

a processing module 1001, configured to perform a target processing operation when performing resource scheduling for a first terminal; the performing a target processing operation includes at least one of:

relevant parameters of resource scheduling;

and (5) configuring a resource pool.

Optionally, the first information includes at least one of:

a first time interval, the first time interval being a time interval between a physical through link feedback channel and a physical uplink control channel resource;

a value of a second timer of the first terminal, the second timer being a discontinuous reception hybrid automatic repeat request round trip time timer of a cellular communication interface;

the second time interval is a time interval between downlink control information and transmission of the direct link;

a time domain starting position of a transmission resource of the direct link;

resource periods.

Optionally, the determined value of the first timer of the second terminal includes:

or alternatively, the process may be performed,

Optionally, the second information includes at least one of:

the time when the base station receives the transmission on the physical uplink control channel;

the value of a first timer currently activated by the second terminal, wherein the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface;

the physical through link in the resource pool feeds back the position of the channel resource;

the last through link transmission position indicated by the last downlink control information;

a value of a second timer currently activated by the first terminal, wherein the second timer is a discontinuous reception hybrid automatic repeat request round trip time timer of a cellular communication interface;

a time domain starting position of a transmission resource of the direct link;

resource periods.

Optionally, the determined transmission time unit of the downlink control information includes at least one of the following:

the sending time unit of the downlink control information is equal to the end time of the second timer currently activated by the first terminal;

the sending time unit of the downlink control information is after the end time of the second timer activated by the first terminal currently;

the sending time unit of the downlink control information is equal to the end time of the first timer currently activated by the second terminal;

the sending time unit of the downlink control information is after the end time of the first timer currently activated by the second terminal;

The second embodiment of the present invention corresponds to the method of the first embodiment, and all the implementation means in the first embodiment are applicable to the embodiment of the through link resource selection device, so that the same technical effects can be achieved.

Third embodiment

In order to better achieve the above object, as shown in fig. 11, the present invention further provides a base station, including:

a processor 1100; and a memory 1120 connected to the processor 1100 through a bus interface, the memory 1120 storing programs and data used by the processor 1100 when performing operations, the processor 1100 calling and executing the programs and data stored in the memory 1120.

Wherein the transceiver 1110 is coupled to the bus interface for receiving and transmitting data under the control of the processor 1100; the processor 1100 is configured to read a program in the memory 1120 to perform the steps of:

Executing target processing operation when carrying out resource scheduling for the first terminal; the performing a target processing operation includes at least one of:

determining a value of a first timer of the second terminal according to the first information; the first timer is a direct link discontinuous reception hybrid automatic retransmission round trip time timer of a direct link communication interface;

relevant parameters of resource scheduling;

and (5) configuring a resource pool.

Wherein in fig. 11, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1130 may also be an interface capable of interfacing with an internal connection requiring device for a different terminal, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Optionally, the first information includes at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

or alternatively, the process may be performed,

Optionally, the second information includes at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

When the base station provided by the invention executes resource scheduling for the first terminal, the value of the direct link discontinuous reception hybrid automatic repeat round trip time Timer (sl-drx-HARQ-RTT-Timer) of the direct link communication interface of the second terminal is set based on the first information, and/or the sending time unit of the downlink control information is set based on the second information, so that the transmission corresponding to the direct link permission is in the activation time of the second terminal, thereby ensuring that the second terminal receives the transmission resource and the downlink control information, and improving the reliability of the direct link transmission.

Those skilled in the art will appreciate that all or part of the steps of implementing the above-described embodiments may be implemented by hardware, or may be implemented by instructing the relevant hardware by a computer program comprising instructions for performing some or all of the steps of the above-described methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

In addition, a specific embodiment of the present invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method in the first embodiment described above. And the same technical effects can be achieved, and in order to avoid repetition, the description is omitted here.

Furthermore, it should be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order of description, but are not necessarily performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present invention may be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, as would be apparent to one of ordinary skill in the art after reading this description of the invention.

The object of the invention can thus also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention can thus also be achieved by merely providing a program product containing program code for implementing said method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The steps of executing the series of processes may naturally be executed in chronological order in the order described, but are not necessarily executed in chronological order. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. The method for selecting the through link resource is characterized by being applied to a base station and comprising the following steps:

the performing a target processing operation includes at least one of:

relevant parameters of resource scheduling;

and (5) configuring a resource pool.

2. The through link resource selection method according to claim 1, wherein the first information includes at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

3. The through link resource selection method according to claim 1 or 2, characterized in that the determined value of the first timer of the second terminal comprises:

or alternatively, the process may be performed,

4. The through link resource selection method according to claim 1, wherein the second information includes at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

5. The through link resource selection method according to claim 1 or 4, characterized in that the determined transmission time unit of the downlink control information comprises at least one of the following:

6. A base station, comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the through link resource selection method according to any of the claims 1 to 5 when executing the computer program.

7. A through link resource selection device, applied to a base station, comprising:

the performing a target processing operation includes at least one of:

relevant parameters of resource scheduling;

DRX configuration of a cellular communication interface of the first terminal;

and (5) configuring a resource pool.

8. The through link resource selection device of claim 7, wherein the first information comprises at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

9. The through link resource selection device of claim 7, wherein the second information comprises at least one of:

a time domain starting position of a transmission resource of the direct link;

resource periods.

10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the through link resource selection method according to any of claims 1 to 5.