Methods and apparatus of multicast broadcast services transmission and reception on SCell or non-serving cell

A method comprising:

• transmitting, by a serving primary cell (PCell) of a base station, a unicast service to a user equipment (UE) in a wireless network, wherein the UE is configured with multiple component carriers (CC), and wherein the unicast service is configured with one or more CCs of the UE;
• receiving assistance information for multicast and broadcast service (MBS) from the UE for an MBS in a non-serving cell or a secondary cell (SCell);
• sending a reconfiguration message to the UE for the unicast service based on the assistance information and available data rate for UE to reduce a unicast data rate such that the UE receives the unicast service in the serving PCell and the MBS in the non-serving cell or the SCell simultaneously;
• and
• sending an adjustment configuration for the unicast service to deactivate one or more CCs for the unicast service.

A user equipment (UE), comprising:

• a transceiver that transmits and receives radio frequency (RF) signal in a wireless network;
• a unicast module that receives a unicast service from a serving primary cell (PCell) in the wireless network, wherein the UE is configured with multiple component carriers (CC), and wherein the unicast service is configured with one or more CCs of the UE, and receives adjustment configuration for the unicast serving from the serving PCell, and wherein the adjustment configuration deactivates one or more CCs for the unicast service;
• a reporting module that reports assistance information for receiving multicast and broadcast service (MBS) to the serving PCell;
• and
• an MBS module that receives an MBS from a non-serving cell or a secondary cell (SCell) simultaneously with reception of the unicast service from the serving PCell, and receives an adjustment configuration for the unicast service from the serving PCell, wherein the adjustment configuration is based on the assistance information and available data rate for UE to reduce a unicast data rate by deactivating one or more CCs for the unicast service.