OFDMA蜂窝中继网络中继选择算法研究

Relay selection in OFDMA cellular relaying networks

提出两种用于正交频分多址(OFDMA)蜂窝中继网络的中继选择算法,一种在限制数据速率情况下,以用户能量消耗最小化为优化目标;另一种在限制花费能量情况下,以系统频谱效率最大化为优化目标.同时,加入了小区内负载平衡处理机制.首先将基于定价的多小区非合作功率分配博弈模型引入蜂窝中继网络中,得到每一跳的功率-效用对;然后将其合并得到每条路径的功率-效用对;最后依据不同的优化目标,在可行路径的功率和效用之间进行折中中继选择.仿真结果表明,相对于基于信干噪比(SINR)的中继选择算法,提出的两种中继选择算法分别达到了其优化目标,获得了相应的性能增益.

To minimize the terminal energy consumption under spectral efficiency constraints and to maximize the system spectral efficiency under energy consumption constraints, two relay selection algorithms are presented respectively for OFDMA cellular relaying networks, in which the load balancing solution is integrated. Firstly, multi-cell non-cooperative power allocation game framework via pricing is introduced into the relaying networks to obtain the power-utility pair of hops. Then the power-utility pair of each route can be achieved by combining its hops. Finally, the best route is chosen by different optimization objectives under the framework of power-utility tradeoffs. Simulation results verify that the two presented relay selection algorithms perform more advantages depending on the desired power-utility tradeoff rather than the SINR-based relay selection al- gorithm respectively.