关键词: 多业务组播, 子载波协作, 功率注水, 公平性

Abstract:

To maximize the system throughput, a subcarrier and power allocation scheme for multi-service multicast system is proposed. The new scheme works in three steps. Firstly, to ensure the fairness among services, subcarrier and power allocation among services is performed according to the target data rate of each service; Secondly, to maximize the system throughput while ensure the fairness among users with the same service, a subcarrier cooperation scheme and a simplified scheme are derived; Finally, the water-filling method is adopted to get further capacity improvement. Simulation results show that the proposed scheme can significantly improve the system throughput, while ensure the fairness among multicast services and among users with the same service.

Key words: multi-service multicast, subcarrier cooperation, power water-filling, fairness