多用户协作网络中的中继和频谱分配方案探讨

Relay and Spectrum Allocation Scheme in Multi-user Cooperative Networks

现有的对认知协作网络中中继分配和频谱分配方案的研究大多都是基于单用户的,很少考虑到实际网络中多用户共存且同时有传输需求的情况,造成用户体验差等情况,为了解决这种问题,在保证用户基本通信条件的基础上,分别基于网络吞吐量最大、网络中断概率最小和网络能耗最小三个不同的网络目标,提出了三种多用户协作网络中的中继和频谱分配方案,并运用频谱聚合技术将分配给同一用户或中继的频谱聚合在一起进行数据传输服务。分析表明,所提算法提高了网络的性能,改善了用户体验,达到了节能的效果。

Currently, as most researches on relay assignment and spectrum allocation schemes in cognitive cooperative networks are based on single user, the multi-user coexistence and simultaneous transmission are less considered in real network, resulting in the poor user experience. To deal with this situation, on the basis of ensuring user＇s basic communication, three relay assignment and spectrum allocation schemes in multi-user cooperation networks were proposed based on the network throughput maximization, network outage probability minimization and network energy consumption minimization, respectively. The spectrum aggregation technique was used to aggregate the spectrum that is assigned to the same user or the relay spectrum for data transmission. Analysis demonstrates that the proposed algorithm can improve the network performance, enhance user experience and achieve energy saving.