Sidelink HARQ feedback transmission method and device thereof
Provided are a method and device for providing vehicle-to-everything (V 2 X) services in next generation wireless access technology (New RAT). The method controls the sidelink HARQ feedback operation by a terminal. A PSSCH scheduled by a PSCCH including sidelink control information is received from a transmitting terminal. Wireless resources of a PSFCH including HARQ feedback information regarding the PSSCH are determined and allocated in one symbol. The PSFCH, allocated in the one symbol, are repeatedly transmitted to the transmitting terminal in two consecutive symbols.
1. A method of controlling a sidelink HARQ feedback operation by a terminal, the method comprising:
receiving a PSSCH scheduled by a PSCCH including sidelink control information from a transmitting terminal;
determining wireless resources of a PSFCH including HARQ feedback information regarding the PSSCH; and
repeatedly transmitting the PSFCH, allocated in one symbol, to the transmitting terminal in two consecutive symbols,
wherein the sidelink control information comprises first sidelink control information and second sidelink control information,
wherein, when the PSSCH includes groupcast sidelink data, the PSSCH includes position information of the transmitting terminal,
wherein the position information of the transmitting terminal is included in the second sidelink control information, and includes zone ID information of the transmitting terminal, and
wherein the HARQ feedback information is determined in accordance with distance information calculated according to a position of the transmitting terminal and a position of the terminal and whether or not decoding of the groupcast sidelink data has succeeded.
2. The method according to claim 1 , wherein the wireless resources of the PSFCH are determined in accordance with minimum timing gap information per slot between the reception of the PSSCH and the transmission of the PSFCH, physical resource block set information regarding at least one physical resource block set for the PSFCH, and information regarding transmission slots in a resource pool in a PSFCH transmission occasion that is periodically allocated.
3. The method according to claim 2 , wherein the wireless resources of the PSFCH are determined in a first slot from among a plurality of slots allocated in the resource pool in the PSFCH transmission occasion present after a slot indicated by the minimum timing gap information, with respect to a last slot in which the PSSCH is received.
4. The method according to claim 1 , wherein the second sidelink control information received via the PSSCH is different from the sidelink control information including scheduling information regarding the PSSCH.
5. A terminal controlling a sidelink HARQ feedback operation, the terminal comprising:
a receiver receiving a PSSCH scheduled by a PSCCH including sidelink control information from a transmitting terminal;
a controller determining wireless resources of a PSFCH including HARQ feedback information regarding the PSSCH; and
a transmitter repeatedly transmitting the PSFCH, allocated in one symbol, to the transmitting terminal in two consecutive symbols,
wherein the sidelink control information comprises first sidelink control information and second sidelink control information,
wherein, when the PSSCH includes groupcast sidelink data, the PSSCH includes position information of the transmitting terminal,
wherein the position information of the transmitting terminal is included in the second sidelink control information, and includes zone ID information of the transmitting terminal, and
wherein the HARQ feedback information is determined in accordance with distance information calculated according to a position of the transmitting terminal and a position of the terminal and whether or not decoding of the groupcast sidelink data has succeeded.
6. The terminal according to claim 5 , wherein the wireless resources of the PSFCH are determined in accordance with minimum timing gap information per slot between the reception of the PSSCH and the transmission of the PSFCH, physical resource block set information regarding at least one physical resource block set for the PSFCH, and information regarding transmission slots in a resource pool in a PSFCH transmission occasion that is periodically allocated.
7. The terminal according to claim 6 , wherein the wireless resources of the PSFCH are determined in a first slot from among a plurality of slots allocated in the resource pool in the PSFCH transmission occasion present after a slot indicated by the minimum timing gap information, with respect to a last slot in which the PSSCH is received.
8. The terminal according to claim 5 , wherein the second sidelink control information transmitted via the PSSCH is different from the sidelink control information including scheduling information regarding the PSSCH.