Method and apparatus for transmission and reception of sidelink control information in communication system
View Patent ↗A method and apparatus for transmission and reception of sidelink control information in a communication system are disclosed. An operation method of a transmission terminal comprises the steps of: generating first stage SCI including resource allocation information of a plurality of pieces of second stage SCI; transmitting the first stage SCI to one or more reception terminals; and transmitting the plurality of pieces of second stage SCI to the one or more reception terminals in a resource area indicated by the resource allocation information. Therefore, the performance of the communication system can be improved.
1. A method of operating a transmitting terminal in a communication system, the operation method comprising:
generating a 1st-stage sidelink control information (SCI) including resource allocation information of m 2nd-stage SCIs;
transmitting the 1st-stage SCI to one or more receiving terminals; and
transmitting the m 2nd-stage SCIs to the one or more receiving terminals in resource region(s) indicated by the resource allocation information,
wherein m is a natural number that is set in a resource pool-specific manner through a higher layer message from a base station,
wherein the resource allocation information includes time resource information and frequency resource information for each of the m 2nd-stage SCIs, and
wherein the m 2nd-stage SCIs are transmitted on different physical sidelink shared channels (PSSCHs).
2. The method according to claim 1 , further comprising receiving, from a base station, a message including configuration information of candidate resources capable of transmitting the m 2nd-stage SCIs, wherein the resource region(s) indicated by the resource allocation information is one candidate resource among the candidate resources.
3. The method according to claim 1 , wherein the time resource information indicates at least one of a start symbol index, a number of symbols, or slot index(es), and the frequency resource information indicates at least one of a start resource element (RE) index, a number of REs, or subchannel index(es).
4. The method according to claim 1 , wherein the resource allocation information includes information indicating a time resource and a frequency resource of a 2nd-stage SCI #n among the m 2nd-stage SCIs, a time interval between the m 2nd-stage SCIs, a frequency interval between the m 2nd-stage SCIs, or combinations thereof, and n is a natural number.
5. The method according to claim 4 , wherein the time interval is a time-domain interval between the time resource of the 2nd-stage SCI #n and a time resource of a 2nd-stage SCI #n+1 among the m 2nd-stage SCIs, and the frequency interval is a frequency-domain interval between the frequency resource of the 2nd-stage SCI #n and a frequency resource of the 2nd-stage SCI #n+1.
6. The method according to claim 1 , wherein the 1st-stage SCI includes common control information for the one or more receiving terminals, and the m 2nd-stage SCIs include dedicated control information for the one or more receiving terminals, respectively.
7. The method according to claim 1 , wherein the m 2nd-stage SCIs are multiplexed in at least one of a time domain and a frequency domain.
8. A method of operating a receiving terminal in a communication system, the operation method comprising:
receiving a 1st-stage sidelink control information (SCI) from a transmitting terminal;
obtaining resource allocation information of a m 2nd-stage SCIs included in the 1st-stage SCI; and
receiving the m 2nd-stage SCIs from the transmitting terminal in resource region(s) indicated by the resource allocation information,
wherein m is a natural number that is set in a resource pool-specific manner through a higher layer message from a base station,
wherein the resource allocation information includes time resource information and frequency resource information for each of the m 2nd-stage SCIs, and
wherein the m 2nd-stage SCIs are received on different physical sidelink shared channels (PSSCHs).
9. The method according to claim 8 , further comprising receiving, from a base station, a message including configuration information of candidate resources capable of transmitting the m 2nd-stage SCIs, wherein the resource region(s) indicated by the resource allocation information is one candidate resource among the candidate resources.
10. The method according to claim 8 , wherein the 1st-stage SCI is obtained by performing a blind decoding operation, and the m 2nd-stage SCIs are obtained without performing a blind decoding operation.
11. The method according to claim 8 , wherein the time resource information indicates at least one of a start symbol index, a number of symbols, or slot index(es), and the frequency resource information indicates at least one of a start resource element (RE) index, a number of REs, or subchannel index(es).
12. The method according to claim 8 , wherein the resource allocation information includes information indicating a time resource and a frequency resource of a 2nd-stage SCI #n among the m 2nd-stage SCIs, a time interval between the m 2nd-stage SCIs, a frequency interval between the m 2nd-stage SCIs, or combinations thereof, and n is a natural number.
13. The method according to claim 12 , wherein the time interval is a time-domain interval between the time resource of the 2nd-stage SCI #n and a time resource of a 2nd-stage SCI #n+1 among the m 2nd-stage SCIs, and the frequency interval is a frequency-domain interval between the frequency resource of the 2nd-stage SCI #n and a frequency resource of the 2nd-stage SCI #n+1.
14. A method of operating a transmitting terminal in a communication system, the operation method comprising:
receiving, from a base station, a message including sidelink (SL)-physical sidelink control channel (PSCCH) configuration information and SL-physical sidelink shared channel (PSSCH) configuration information;
transmitting a 1st-stage sidelink control information (SCI) to a receiving terminal on a PSCCH indicated by the SL-PSCCH configuration information;
transmitting a m 2nd-stage SCIs to the receiving terminal on PSSCH(s) indicated by the SL-PSSCH configuration information; and
transmitting data to the receiving terminal based on information elements included in the 1st-stage SCI and the m 2nd-stage SCIs,
wherein m is a natural number that is set in a resource pool-specific manner through a higher layer message from a base station,
wherein the SL-PSSCH configuration information includes time resource information and frequency resource information for each of the m 2nd-stage SCIs, and
wherein the m 2nd-stage SCIs are transmitted on different physical PSSCHs.
15. The method according to claim 14 , wherein the time resource information indicates at least one of a start symbol index, a number of symbols, or slot index(es), and the frequency resource information indicates at least one of a start resource element (RE) index, a number of REs, or subchannel index(es).
16. The method according to claim 14 , wherein:
the SL-PSSCH configuration information includes information indicating a time resource and a frequency resource of a 2nd-stage SCI #n among the m 2nd-stage SCIs, a time interval between the m 2nd-stage SCIs, a frequency interval between the m 2nd-stage SCIs, or combinations thereof, and
the time interval is a time-domain interval between the time resource of the 2nd-stage SCI #n and a time resource of a 2nd-stage SCI #n+1 among the m 2nd-stage SCIs, and the frequency interval is a frequency-domain interval between the frequency resource of the 2nd-stage SCI #n and a frequency resource of the 2nd-stage SCI #n+1.
17. The method according to claim 14 , wherein the SL-PSSCH configuration information includes configuration information of candidate resources capable of transmitting the m 2nd-stage SCIs, and the 1st-stage SCI includes information indicating one candidate resource among the candidate resources.