SIDELINK COMMUNICATIONS IN SHARED SPECTRUM

A wireless device may receive, from a second wireless device, first sidelink control information (SCI) comprising a channel occupancy time (COT) duration that the second wireless device initiates and shares for a physical shared sidelink channel (PSSCH) transmission by the first wireless device. The wireless device may determine, for the PSSCH transmission within the COT duration, a first cyclic prefix extension (CPE) length from among a plurality of CPE lengths associated with a plurality of physical layer (L1) priority values, wherein the determining is based on the first CPE length being associated with a first L1 priority value of sidelink data of the PSSCH transmission. The wireless device may transmit, within the COT duration, a CPE of the PSSCH transmission, wherein a length of the CPE is the first CPE length. The wireless device may transmit, within the COT duration, the PSSCH transmission indicating the first L1 priority value.