Common Feedback Channel for Multicast and Broadcast Services

Multicast and broadcast service (MBS) is one of the important services for next generation wireless systems. Normally, the base station (BS) may perform advance radio resource management functionalities based on the channel quality indicator (CQI) reports sent by MBS subscribers. However, the CQI reports lead to high signaling overhead at the uplink. This paper proposed a common feedback channel to reduce the uplink signaling overhead. A simple dynamic modulation and coding scheme (MCS) is then presented to improve the spectral efficiency based on the limited information carried by the common feedback channel. Simulation results showed that the proposed method could enhance the spectral efficiency with reduced signaling overhead. The results also demonstrated the robustness of the common feedback channel in the presence of feedback errors.