| CPC H04W 72/02 (2013.01) [H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 72/20 (2023.01)] | 15 Claims |

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1. A method performed by a first terminal in a communication system, the method comprising:
identifying resources for a physical sidelink control channel (PSCCH)
identifying resources for a physical sidelink shared channel (PSSCH);
transmitting, to a second terminal, first sidelink control information (SCI) on the identified resources for the PSCCH; and
transmitting, to the second terminal, second SCI and data on the identified resources for the PSSCH,
wherein the identifying of the resources for the PSSCH comprises:
mapping the second SCI, according to an order of an index for first frequency domain and then an index for time domain; and
mapping the data to a resource being not used for the second SCI.
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