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提出了多播中继网络中基于有限反馈的自适应子载波和功率分配策略.根据新的反馈算法和传输协议确定每个多播组的传输模式;又提出“公平子载波分配”策略,达到了公平性和服务质量的折中,最后根据新的“协作功率迭代(CFI)”策略完成了有效的功率分配,该CFI策略先利用注水定理确定每个子载波的目标速率,然后通过一个功率迭代过程实现了功率最佳化.仿真结果显示新的多播策略大大降低了上行反馈开销且所需功率和多播业务中断概率远远小于直传策略.
The adaptive subcarrier and power allocation strategy based on limited feedback in multicast relay network is proposed.The transmission mode of each multicast group is determined according to the new feedback algorithm and transmission protocol and the fair subcarrier allocation strategy , Reached a trade-off between fairness and quality of service. Finally, efficient power allocation is accomplished according to a new “Co-operating Power Iteration (CFI)” strategy that first uses the water injection theorem to determine the target rate for each subcarrier and then The power optimization is achieved through a power iteration process.The simulation results show that the new multicast strategy greatly reduces the uplink feedback overhead and the required power and multicast service interruption probability is far less than the direct-transfer strategy.