Sidelink Control Information Processing

A wireless device, comprising:

• at least one antenna for performing wireless communications;
• a radio coupled to the at least one antenna;
• and
• a processor coupled to the radio;
• wherein the wireless device is configured to:
• polar encode first sidelink control information to obtain polar encoded first sidelink control information, wherein the first sidelink control information comprises second stage sidelink control information;
• perform rate matching on the polar encoded first sidelink control information;
• determine a result of a cyclic redundancy check performed on second sidelink control information received over a physical sidelink control channel (PSCCH);
• scramble the polar encoded first sidelink control information based at least in part on the result of the cyclic redundancy check;
• and
• transmit the scrambled polar encoded first sidelink information to a remote device on a physical sidelink shared channel (PSSCH).

A baseband processor configured to perform operations comprising:

• receiving downlink control information from a base station indicating timing for the wireless device to transmit sidelink hybrid automatic repeat request (HARQ) feedback to the base station;
• determining that the indicated timing for transmitting the sidelink HARQ feedback conflicts with a second transmission, wherein the second transmission comprises a downlink HARQ message;
• determining a first priority of sidelink data associated with the sidelink HARQ feedback and a second priority of the second transmission based at least in part on determining that the indicated timing for transmitting the sidelink HARQ feedback conflicts with the second transmission;
• based at least on a comparison of the first priority of the sidelink data and the second priority of the second transmission, transmitting either the sidelink HARQ feedback or the second transmission to the base station according to the indicated timing.