Sidelink transmission and reception methods and apparatuses
A sidelink transmission and reception methods and apparatuses. The sidelink transmission method includes transmitting first sidelink control information via a physical sidelink control channel; and transmitting second sidelink control information and a first transport block via a physical sidelink shared channel, wherein the first sidelink control information or the second sidelink control information or a media access control protocol data unit of the first transport block indicates or carries triggering information used for triggering a second terminal equipment to report sidelink resource information.
1. A sidelink transmission apparatus, comprising:
a first transmitting unit configured to transmit first sidelink control information via a physical sidelink control channel; and
a second transmitting unit configured to transmit second sidelink control information and a first transport block via a physical sidelink shared channel, wherein the second sidelink control information or a media access control protocol data unit of the first transport block indicates or carries triggering information used for triggering a second terminal equipment to report sidelink resource information;
wherein the sidelink resource information comprises a sidelink resource set preferred by the second terminal equipment and/or a sidelink resource set not preferred by the second terminal equipment;
wherein the second transmitting unit is further configured to transmit first indication information used by the second terminal equipment for determining the sidelink resource information; and
wherein the first indication information comprises at least one piece of the following or a combination thereof: a position of a starting time of a resource selection window, a position of an ending time of the resource selection window, or the number of sub-channels in a frequency domain occupied by sidelink resources.
2. The apparatus according to claim 1 , wherein the triggering information is indicated by afield in the first sidelink control information or the second sidelink control information.
3. The apparatus according to claim 1 , wherein the first sidelink control information reserves one or more sidelink resources used by the second terminal equipment for reporting the sidelink resource information.
4. The apparatus according to claim 1 , wherein the first indication information is indicated or carried by the first sidelink control information, or is indicated or carried by the second sidelink control information, or is indicated or carried by the media access control protocol data unit of the first transport block.
5. The apparatus according to claim 1 , wherein the first transport block only carries information used for indicating the triggering information and the first indication information.
6. The apparatus according to claim 1 , wherein the first transport block carries the triggering information, the first indication information, and data towards the second terminal equipment.
7. The apparatus according to claim 1 , wherein the apparatus further comprises:
a receiving unit configured to receive the sidelink resource information reported by the second terminal equipment; and
the second transmitting unit transmits the first transport block again according to the sidelink resource information, or transmits a second transport block different from the first transport block.
8. The apparatus according to claim 7 , wherein the receiving unit is further configured to receive feedback information transmitted by the second terminal equipment, the feedback information indicating whether the first transport block is correctly received.
9. The apparatus according to claim 8 , wherein the feedback information and the sidelink resource information are transmitted together.
10. The apparatus according to claim 9 , wherein the feedback information is indicated or carried by first sidelink control information or second sidelink control information or a media access control protocol data unit of a second transport block transmitted by the second terminal equipment.
11. The apparatus according to claim 8 , wherein the feedback information is transmitted via a physical sidelink feedback channel, and the sidelink resource information is transmitted via a physical sidelink shared channel.
12. The apparatus according to claim 11 , wherein the second transmitting unit transmits the triggering information and the first transport block on a sidelink resource associated with a physical sidelink feedback channel.
13. The apparatus according to claim 1 , wherein the second terminal equipment does not transmit the sidelink resource information when the first transport block is correctly received.
14. The apparatus according to claim 1 , wherein the first sidelink control information or the second sidelink control information or the media access control protocol data unit of the first transport block indicates or carries second indication information, the second indication information indicating whether the second terminal equipment reports the sidelink resource information when the first transport block is correctly received.
15. The apparatus according to claim 1 , wherein the sidelink resource information is used to transmit a second transport block different from the first transport block.
16. A sidelink reception apparatus, comprising:
a first receiving unit configured to receive first sidelink control information transmitted via a physical sidelink control channel; and
a second receiving unit configured to receive second sidelink control information and a first transport block transmitted via a physical sidelink shared channel, wherein the second sidelink control information or a media access control protocol data unit of the first transport block indicates or carries triggering information used for triggering a second terminal equipment to report sidelink resource information;
wherein the sidelink resource information comprises a sidelink resource set preferred by the second terminal equipment and/or a sidelink resource set not preferred by the second terminal equipment;
wherein the second receiving unit is further configured to receive first indication information used by the second terminal equipment for determining the sidelink resource information; and
wherein the first indication information comprises at least one piece of the following or a combination thereof: a position of a starting time of a resource selection window, a position of an ending time of the resource selection window, or the number of sub-channels in a frequency domain occupied by sidelink resources.
17. The apparatus according to claim 16 , wherein the second terminal equipment triggers resource selection or re-selection, and autonomously selects and determines the sidelink resources used for reporting sidelink resource information.
18. The apparatus according to claim 16 , wherein the sidelink resource information is carried in the media access control protocol data unit.
19. A communication system, comprising:
a first terminal equipment configured to transmit first sidelink control information via a physical sidelink control channel, and transmit second sidelink control information and a first transport block via a physical sidelink shared channel, wherein the second sidelink control information or a media access control protocol data unit of the first transport block indicates or carries triggering information; and
a second terminal equipment configured to receive the first sidelink control information, the second sidelink control information and the first transport block, wherein the triggering information is used for triggering the second terminal equipment to report sidelink resource information;
wherein the sidelink resource information comprises a sidelink resource set preferred by the second terminal equipment and/or a sidelink resource set not preferred by the second terminal equipment;
wherein the first terminal equipment is further configured to transmit first indication information used by the second terminal equipment for determining the sidelink resource information; and
wherein the first indication information comprises at least one piece of the following or a combination thereof: a position of a starting time of a resource selection window, a position of an ending time of the resource selection window, or the number of sub-channels in a frequency domain occupied by sidelink resources.