Sidelink discontinuous reception alignment

A first wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
• receive, from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset;
• determine a starting time of an active time of a sidelink DRX (SL DRX) based on the DL DRX on-duration start offset, wherein the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on the first wireless device being capable of simultaneous reception of a sidelink and a downlink;
• and
• receive, from a second wireless device, one or more sidelink transport blocks during the active time.

A system comprising:

• a first wireless device comprising one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the first wireless device to:
• receive, from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset;
• determine a starting time of an active time of a sidelink DRX (SL DRX) based on the DL DRX on-duration start offset, wherein the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on the first wireless device being capable of simultaneous reception of a sidelink and a downlink;
• and
• receive, from a second wireless device, one or more sidelink transport blocks during the active time;
• and
• the second wireless device comprising one or more second processors and second memory storing second instructions that, when executed by the one or more second processors, cause the second wireless device to transmit, to the first wireless device, the one or more sidelink transport blocks.