A Time-division multicast transmission scheme using multiple multicast groups

In the conventional multicast transmission scheme the multicast signals are transmitted to a single multicast group in one multicast service and the system capacity is restricted by the worst channel user. We proposed a novel time-division multicast transmission scheme using multiple multicast groups. In this scheme, the signals are transmitted to the inner multicast group within a boundary distance in the first time slot, and to the outer multicast group beyond the boundary distance in the next time slot, hence there is a substantial increase in the system capacity of the inner multicast group. The performance of the proposed scheme over Nakagami Fading channels is analyzed and numerical results show that when the cell radius is beyond a small size, the proposed scheme can outperform the conventional scheme in terms of system capacity.