Method for transmitting downlink control information for sidelink scheduling in wireless communication system and terminal using same
Provided are a method for transmitting downlink control information for sidelink scheduling in a wireless communication system and a wireless apparatus using the method. The method is characterized by: generating sidelink SPS activation/release DCI for indicating sidelink semi-persistent scheduling (SPS) activation or release; and transmitting the sidelink SPS activation/release DCI to a terminal, wherein the sidelink SPS activation/release DCI further comprises a sidelink SPS activation/release field and a sidelink SPS configuration index field not present in sidelink dynamic DCI which is for dynamically scheduling the sidelink.
1. A method of decoding downlink control information (DCI) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving the DCI from a base station; and
decoding the DCI,
wherein based on the DCI being a first DCI to activate a sidelink semi-persistent scheduling (SPS) between the UE and another UE for a Vehicle-to-Everything (V2X) communication, the first DCI comprises (i) a sidelink SPS configuration index field and (ii) a sidelink SPS activation field, the sidelink SPS configuration index field informing a sidelink SPS configuration that is related to control information of the first DCI, the sidelink SPS activation field informing an activation of the sidelink SPS configuration, and
wherein based on the DCI being a second DCI to activate an uplink SPS between the UE and the base station for a V2X communication, the second DCI comprises a demodulation reference signal (DM-RS) cyclic shift field that informs an index of an uplink SPS configuration that is related to control information of the second DCI.
2. The method of claim 1 , wherein the sidelink SPS configuration index field informs the sidelink SPS configuration among a plurality of sidelink SPS configurations.
3. The method of claim 1 , wherein the DCI is decoded based on a radio network temporary identifier.
4. A user equipment (UE), the UE comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving downlink control information (DCI) from a base station; and
decoding the DCI,
wherein based on the DCI being a first DCI to activate a sidelink semi-persistent scheduling (SPS) between the UE and another UE for a Vehicle-to-Everything (V2X) communication, the first DCI comprises (i) a sidelink SPS configuration index field and (ii) a sidelink SPS activation field, the sidelink SPS configuration index field informing a sidelink SPS configuration that is related to control information of the first DCI, the sidelink SPS activation field informing an activation of the sidelink SPS configuration, and
wherein based on the DCI being a second DCI to activate an uplink SPS between the UE and the base station for a V2X communication, the second DCI comprises a demodulation reference signal (DM-RS) cyclic shift field that informs an index of an uplink SPS configuration that is related to control information of the second DCI.
5. The UE of claim 4 , wherein the sidelink SPS configuration index field informs the sidelink SPS configuration among a plurality of sidelink SPS configurations.
6. The UE of claim 4 , wherein the DCI is decoded based on a radio network temporary identifier.
7. An apparatus configured to control a user equipment (UE), the apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving downlink control information (DCI) from a base station; and
decoding the DCI,
wherein based on the DCI being a first DCI to activate a sidelink semi-persistent scheduling (SPS) between the UE and another UE for a Vehicle-to-Everything (V2X) communication, the first DCI comprises (i) a sidelink SPS configuration index field and (ii) a sidelink SPS activation field, the sidelink SPS configuration index field informing a sidelink SPS configuration that is related to control information of the first DCI, the sidelink SPS activation field informing an activation of the sidelink SPS configuration, and
wherein based on the DCI being a second DCI to activate an uplink SPS between the UE and the base station for a V2X communication, the second DCI comprises a demodulation reference signal (DM-RS) cyclic shift field that informs an index of an uplink SPS configuration that is related to control information of the second DCI.
8. The apparatus of claim 7 , wherein the sidelink SPS configuration index field informs the sidelink SPS configuration among a plurality of sidelink SPS configurations.
9. The apparatus of claim 7 , wherein the DCI is decoded based on a radio network temporary identifier.