Resource selection method, resource selection device and terminal device
A resource selection method, a resource selection device and a terminal device are provided, related to the field of communications technologies. The method includes: transmitting sidelink resource coordination request information; receiving sidelink resource coordination information from a coordinating UE; and performing a resource selection for the sidelink, according to the sidelink resource coordination information.
1 . A resource selection method, performed by a coordinated user equipment (UE) of a Vehicle to everything (V2X) sidelink system and comprising:
transmitting, to a coordinating UE, sidelink resource coordination request information for requesting the coordinating UE to coordinate resources of a sidelink between the coordinated UE and the coordinating UE;
receiving sidelink resource coordination information from the coordinating UE; and
performing a resource selection for the sidelink, according to the sidelink resource coordination information;
wherein the sidelink resource coordination request information is carried in second stage sidelink control information (2nd-stage SCI), and a bit in a first stage sidelink control information (1st-stage SCI) for indicating a format of the 2nd-stage SCI is “10” or “11”.
2 . The method according to claim 1 , wherein the sidelink resource coordination request information comprises at least one of:
indication information of a maximum time delay of coordinating information feedback;
Reference Signal Receiving Power (RSRP) threshold indication information;
indication information of coordinating information transmission parameter; or
indication information of the coordinating UE.
3 . The method according to claim 1 , wherein the transmission parameter of packet of the coordinated UE comprises at least one of:
a number of sub-channels occupied by a packet to be transmitted by the coordinated UE;
a number of times of retransmission of a packet to be transmitted by the coordinated UE;
a transmission period of a packet to be transmitted by the coordinated UE;
a current Counter value of a packet to be transmitted by the coordinated UE;
a priority of a packet to be transmitted by the coordinated UE; or
a target resource selection window parameter of the coordinated UE.
4 . The method according to claim 2 , wherein the indication information of coordinating information type comprises:
an available time-frequency resource; or
an available time-domain resource; or
an unavailable time-frequency resource; or
an unavailable time-domain resource.
5 . The method according to claim 2 , wherein the indication information of the maximum time delay of coordinating information feedback comprises one of:
a time delay threshold, configured to indicate a maximum time delay between receiving the sidelink resource coordination information and transmitting the sidelink resource coordination request information;
a first offset time, configured to indicate an offset between a time of transmitting the sidelink resource coordination request information and a time when the packet to be transmitted arrives a physical layer of the coordinated UE.
6 . The method according to claim 1 , wherein the indication information of the target resource selection window of resource coordination comprises any one of:
a start time and an end time of a target resource selection window of the coordinated UE;
an end time of a target resource selection window of the coordinated UE.
7 . The method according to claim 6 , wherein when the indication information of the target resource selection window of resource coordination includes the end time of the target resource selection window of the coordinated UE, the received coordination information of sidelink comprises a start time of a resource selection window sensed by the coordinating UE.
8 . The method according to claim 1 , wherein the performing the resource selection for the sidelink according to the sidelink resource coordination information comprises:
determining a resource selection window of the coordinated UE, wherein the resource selection window of the coordinated UE is at least part of a resource indication window contained in the sidelink resource coordination information; and
performing the resource selection for the sidelink in the resource selection window of the coordinated UE.
9 . The method according to claim 2 , wherein the indication information of coordinating information transmission parameter comprises any one of:
a transmission period; or
a transmission period and a number of times of transmission.
10 . The method according to claim 9 , wherein
the indication information of coordinating information transmission parameter is configured by a higher layer or preconfigured; or
when a traffic of the coordinated UE is a periodic traffic, the transmission period is a transmission period of a packet to be transmitted by the coordinated UE, and the number of times of transmission is a current Counter value of a packet to be transmitted by the coordinated UE.
11 . The method according to claim 2 , wherein the RSRP threshold indication information comprises any of:
a maximum value of RSRP threshold;
a maximum value of adjusting times of RSRP threshold.
12 . The method according to claim 1 , wherein the transmitting, to the coordinating UE, the sidelink resource coordination request information comprises:
determining a maximum time delay of transmitting the sidelink resource coordination request information, wherein the maximum time delay of transmitting the sidelink resource coordination request information is configured by a higher layer or preconfigured, or the maximum time delay of transmitting the sidelink resource coordination request information is determined according to a determined maximum time delay between a time of receiving the sidelink resource coordination information and a time when a packet to be transmitted arrives a physical layer of the coordinated UE; and/or
transmitting the sidelink resource coordination request information within the determined maximum time delay of transmitting the sidelink resource coordination request information.
13 . The method according to claim 1 , wherein a priority of the sidelink resource coordination request information is one of:
a priority of a packet to be transmitted;
a priority configured by a higher layer or preconfigured; or
a preset priority, wherein the preset priority is a larger one of a first difference and 0 , the first difference is a difference between a priority of a packet to be transmitted and a preset value, and the preset value is configured by a higher layer.
14 . The method according to claim 2 , wherein when the sidelink resource coordination request information further comprises the indication information of the coordinating UE, the indication information of the coordinating UE comprises identification information of one or more target coordinating UEs.
15 . A terminal device, the terminal device being a coordinated UE and comprising: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor is configured to execute the computer program to perform:
transmitting, to a coordinating UE, sidelink resource coordination request information for requesting the coordinating UE to coordinate resources of a sidelink between the coordinated UE and the coordinating UE;
receiving sidelink resource coordination information from the coordinating UE; and
performing a resource selection for the sidelink, according to the sidelink resource coordination information;
wherein the sidelink resource coordination request information is carried in second stage sidelink control information (2nd-stage SCI), and a bit in a first stage sidelink control information (1st-stage SCI) for indicating a format of the 2nd-stage SCI is “10” or “11”.
16 . The terminal device according to claim 15 , wherein the sidelink resource coordination request information comprises at least one of:
indication information of coordinating information type;
indication information of a maximum time delay of coordinating information feedback;
indication information of a target resource selection window of resource coordination;
a transmission parameter of packet of the coordinated UE;
Reference Signal Receiving Power (RSRP) threshold indication information;
indication information of coordinating information transmission parameter; or
indication information of the coordinating UE.
17 . The terminal device according to claim 16 , wherein the transmission parameter of packet of the coordinated UE comprises at least one of:
a number of sub-channels occupied by a packet to be transmitted by the coordinated UE;
a number of times of retransmission of a packet to be transmitted by the coordinated UE;
a transmission period of a packet to be transmitted by the coordinated UE;
a current Counter value of a packet to be transmitted by the coordinated UE;
a priority of a packet to be transmitted by the coordinated UE; or
a target resource selection window parameter of the coordinated UE.
18 . The terminal device according to claim 15 , wherein the indication information of the target resource selection window of resource coordination comprises any one of:
a start time and an end time of a target resource selection window of the coordinated UE;
an end time of a target resource selection window of the coordinated UE.
19 . The terminal device according to claim 18 , wherein when the indication information of the target resource selection window of resource coordination includes the end time of the target resource selection window of the coordinated UE, the received coordination information of sidelink comprises a start time of a resource selection window sensed by the coordinating UE.
20 . The terminal device according to claim 15 , wherein a priority of the sidelink resource coordination request information is one of:
a priority of a packet to be transmitted;
a priority configured by a higher layer or preconfigured; or
a preset priority, wherein the preset priority is a larger one of a first difference and 0 , the first difference is a difference between a priority of a packet to be transmitted and a preset value, and the preset value is configured by a higher layer.