无线多信道中继网络的中继选择性机会调度

摘要

In this paper we study scheduling for selecting multiple relay nodes in orthogonal frequency division multiple access (OFDMA) relay network to enhance the system throughput. We propose an opportunistic scheduling model with relay nodes selection. The aim is to compromise between system throughput and user fairness with the constraint of channel assignment without interference. We propose two opportunistic scheduling algorithms in view of route diversity and link diversity, which combine relay selection and channel assignment to establish user route and optimally select user. Simulations show that the two algorithms can improve network throughput significantly and ensure user fairness.%为了有效利用OFDMA网络中多点中继协作以提高系统吞吐量,提出了考虑中继选择的调度优化模型.模型以提高系统吞吐量和兼顾用户公平性为目的,以信道无干扰分配为约束条件来进行机会调度.提出了从路径多样性和链路多样性角度设计新的机会调度算法,算法结合信道分配和中继选择建立用户最优路径,然后机会选择用户.仿真结果表明了中继选择的机会调度可以明显提升网络吞吐量,也保障了用户公平性.