Carrier selection and restriction for duplication in multipath relaying for different data for new radio (nr) relays

A relay wireless transmit/receive unit (WTRU) comprising:

• a transceiver;
• and
• a processor operatively coupled to the transceiver;
• wherein:
• the transceiver is configured to receive, from a base station, configuration information which maps incoming sidelink (SL) logical channels (LCHs) of one or more remote WTRUs to one or more Uu LCHs;
• the transceiver is configured to receive, from the base station, a configuration of a set of allowable carriers for each of the incoming SL LCHs of each of the one or more remote WTRUs.
• the transceiver is configured to receive, from the one or more remote WTRUs, one or more indications of whether carrier restriction is required for each of the incoming SL LCHs of each of the one or more remote WTRUs;
• the processor is configured to select one or more carriers for transmission of data for a Uu LCH from allowable carriers, from the set of allowable carriers, of each of SL LCHs of the one or more remote WTRUs that map to the Uu LCH, based on the one or more indications, received from the one or more remote WTRUs, of whether carrier restriction is required for each of the incoming SL LCHs of each of the one or more remote WTRUs;
• and
• the transceiver and the processor are configured to transmit data using the Uu LCH on the selected one or more carriers.