Communicating Based on Multiple Radio Network Temporary Identifiers

A base station comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the base station to:
• transmit, to a wireless device, one or more radio resource control (RRC) messages comprising:
• a first radio network temporary identifier (RNTI) for a multicast and broadcast service (MBS) session;
• a second RNTI for unicast transmissions;
• a first scrambling identity for the MBS session;
• and
• a second scrambling identity for the unicast transmissions;
• transmit a first transport block (TB) scrambled with a first scrambling sequence initialized by:
• the first scrambling identity;
• and
• the first RNTI;
• transmit, based on the second RNTI, a unicast downlink control information (DCI) scheduling a second TB of the unicast transmissions;
• and
• transmit the second TB scrambled with a second scrambling sequence initialized by:
• the second scrambling identity;
• and
• the second RNTI.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

• receive, from a base station, one or more radio resource control (RRC) messages comprising:
• a first radio network temporary identifier (RNTI) for a multicast and broadcast service (MBS) session;
• a second RNTI for unicast transmissions;
• a first scrambling identity for the MBS session;
• and
• a second scrambling identity for the unicast transmissions;
• receive a first transport block (TB) being scrambled with a first scrambling sequence initialized by:
• the first scrambling identity;
• and
• the first RNTI;
• receive, based on the second RNTI, a unicast downlink control information (DCI) scheduling a second TB of the unicast transmissions;
• and
• receive the second TB being scrambled with a second scrambling sequence initialized by:
• the second scrambling identity;
• and
• the second RNTI.