SIDELINK TRANSMISSION METHOD AND APPARATUS
A sidelink transmission method and apparatus. The method includes: receiving sidelink control information by a terminal equipment at a physical layer (PHY), the sidelink control information being used to trigger report of sidelink channel state information; generating sidelink channel state information by the terminal equipment at the physical layer; and transmitting the sidelink control information and the sidelink channel state information by the terminal equipment from the physical layer to a media access control (MAC) layer. Hence, a valid CSI measurement result may be transmitted, and waste of sidelink resources may be avoided at the same time.
1 . An information feedback apparatus, applicable to a first terminal equipment side, the apparatus comprising:
a memory; and
a processor coupled to the memory and configured to:
receive sidelink control information, the sidelink control information being used to indicate the first terminal equipment to perform hybrid automatic repeat request (HARQ) feedback, wherein HARQ feedback information only comprises NACK;
receive sidelink data transmitted by a second terminal equipment;
decode the received sidelink data; and
generate HARQ feedback information and transmit the generated HARQ feedback information to the second terminal equipment when the first terminal equipment is within a communication range of the second terminal equipment and the sidelink data is not correctly decoded.
2 . The apparatus according to claim 1 , wherein the processor further configured to:
determine a decoding result at an MAC layer;
and when the first terminal equipment is within the communication range of the second terminal equipment and a determination result is being not correctly decoded, at the MAC layer, instruct a physical layer to generate HARQ feedback.
3 . The apparatus according to claim 1 , wherein the generated HARQ feedback information is NACK (negative acknowledgement).
4 . The apparatus according to claim 1 , wherein the sidelink control information comprises one bit of HARQ feedback indicator field to instruct the first terminal equipment whether or not to perform HARQ feedback.
5 . The apparatus according to claim 4 , wherein the value of the one bit of HARQ feedback indicator field being set to 1 indicates that the first terminal equipment performs HARQ feedback for received data.
6 . The apparatus according to claim 1 , wherein the sidelink control information being further used to indicate the first terminal equipment to perform groupcast communication with HARQ feedback information only comprising NACK.
7 . The apparatus according to claim 6 , wherein the sidelink control information further comprises location information of the second terminal equipment and/or the communication range.
8 . The apparatus according to claim 7 , wherein the processor further configured to perform the HARQ feedback according to the location information of the second terminal equipment and/or the communication range in the sidelink control information.
9 . The apparatus according to claim 1 , wherein the processor further comprises:
receive at an MAC layer, a decoding result transmitted by a physical layer;
and when the first terminal equipment is within the communication range of the second terminal equipment and the physical layer does not correctly decode, at the MAC layer, instruct the physical layer to generate HARQ feedback, generate HARQ feedback at the physical layer and transmit the HARQ feedback to the second terminal equipment at the physical layer.
10 . The apparatus according to claim 9 , wherein when the first terminal equipment is within the communication range of the second terminal equipment and the physical layer correctly decodes, at the MAC layer, the processor further configured to instruct the physical layer not to generate HARQ feedback, or at the MAC layer, the processor further configured not to instruct the physical layer to generate HARQ feedback.
11 . The apparatus according to claim 1 , wherein the processor further configured to:
determine at an MAC layer according to the communication range whether to instruct a physical layer to generate HARQ feedback;
and when the first terminal equipment is within the communication range of the second terminal equipment, at the MAC layer, instruct the physical layer to generate HARQ feedback; at the physical layer, generate HARQ feedback; and when the physical layer does not decode correctly, transmit the generated HARQ feedback to the second terminal equipment at the physical layer.
12 . The apparatus according to claim 11 , wherein when the physical layer correctly decodes, the processor configured not to transmit the generated HARQ feedback to the second terminal equipment; or, when the physical layer correctly decodes, the first terminal equipment does not generate the HARQ feedback at the physical layer.
13 . The apparatus according to claim 1 , wherein the processor further configured to:
when the first terminal equipment is within the communication range of the second terminal equipment and the sidelink data is not correctly decoded, determine at an MAC layer whether a layer 1 destination address ID indicated in a sidelink control information (SCI) is equal to lower 16 bits of a layer 2 ID of the first terminal equipment; and
when a determination result is yes, generate HARQ feedback, and transmit the generated HARQ feedback to the second terminal equipment.
14 . The apparatus according to claim 1 , wherein at a physical layer, the processor further configured to receive the sidelink data transmitted by the second terminal equipment, and perform decoding at the physical layer.
15 . An information feedback apparatus, applicable to a second terminal equipment side, the apparatus comprising:
a memory; and
a processor coupled to the memory and configured to:
transmit sidelink control information to a first terminal equipment, the sidelink control information being used to indicate the first terminal equipment to perform hybrid automatic repeat request (HARQ) feedback, wherein HARQ feedback information only comprises NACK;
transmit sidelink data to the first terminal equipment;
receive HARQ feedback information generated and transmitted by the first terminal equipment when the first terminal equipment is within a communication range of the second terminal equipment and the sidelink data is not correctly decoded by the first terminal equipment.
16 . The apparatus according to claim 15 , wherein the received HARQ feedback information is NACK (negative acknowledgement).
17 . The apparatus according to claim 15 , wherein the sidelink control information comprises one bit of HARQ feedback indicator field to instruct the first terminal equipment whether or not to perform HARQ feedback.
18 . The apparatus according to claim 17 , wherein the value of the one bit of HARQ feedback indicator field being set to 1 indicates that the first terminal equipment performs HARQ feedback for received data.
19 . The apparatus according to claim 15 , wherein the sidelink control information being further used to indicate the first terminal equipment to perform groupcast communication with HARQ feedback information only comprising NACK.
20 . The apparatus according to claim 19 , wherein the sidelink control information further comprises location information of the second terminal equipment and/or the communication range.