Capacity Maximization and Transmission Rates Optimization for Relay Assisted Wireless Multicast

Capacity Maximization and Transmission Rates Optimization for Relay Assisted Wireless Multicast
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中继辅助无线组播的容量最大化和传输速率优化

DOI:
10.1109/lcomm.2012.090312.120782
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发表时间:
2012-09
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
褚晓理
褚晓理
中科院分区:
其他
文献类型:
--
作者:
王海波;项宏亮;褚晓理

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在这封信中,我们最大限度地利用专用解码转发(DF)中继的蜂窝系统的组播容量,通过联合优化基站(BS)和中继的传输数据速率在瑞利衰落信道的平均中断约束。通过对中继辅助组播的中断概率分析,得到了基站和中继的最优传输速率以及最优中继位置。数值结果表明,中继辅助组播的性能明显优于直接组播,最佳的传输策略是基站和专用中继以相同的速率传输。
In this letter, we maximize the multicast capacity of a cellular system with dedicated decode-and-forward (DF) relays, by jointly optimizing transmission data rates of the base station (BS) and the relays subject to an average outage constraint in Rayleigh fading channels. The optimal transmission rates of the BS and relays and the optimal relay locations are obtained based on an outage probability analysis for the relay-assisted multicast. Numerical results show that relay-aided multicast significantly outperforms direct multicast, and the best transmission strategy is for the BS and dedicated relays to transmit at the same rate.
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