摘要
针对蜂窝网中某一基站处于休眠状态时引起各用户的通信中断问题,提出利用中继协作通信实现跨小区多跳通信的迭代中继选择算法。该算法是在有多个中继节点可为目的节点提供协作中继时,将源节点到目的节点的数据传输分为3个连续时隙,选择满足目的节点信噪比最大化的中继,以协作效率为依据删除协作效率最小的中继节点,从而逐次优化中继选择结果。仿真结果表明,该算法在跨小区多跳的通信过程中,能选择出协作效率最高的中继节点,减少协作中继的数量,可以减少中继对能源不必要的消耗,改善小区内中继协作效率,在多跳的过程中节省源节点的发射功率,从而达到能效优化的目的。
In this paper, a research is done based on the condition that one of the base stations in the cellular network is in sleep mode, caused the problem of communication interrupt. Using cooperative relays as the iterative relay selection algorithm is proposed to realize cross-cell multi-hop communication. This algorithm is in the situation that there are many relays can provide cooperative relay for destination node, dividing the data transmission from source node to destination node into three consecutive slots, choose the relay based on collaborative efficiency, to delete the nodes with lowest collaborative efficiency in each iterative process, to recurrently optimize the results of the relay selection, until destination node＇s signal-noise ratio maximization. The simulation results show that, the proposed algorithm during the cross-cell multi-hops communication, can select the relay node with the highest collaborative efficiency, to reduce cooperative relays, this can not only save the unnecessary energy consumption, but also improve collaborative efficiency of the relays in cellular network. Saving source node＇s sending power during the multi-hop to realize energy effieiency＇s optimization.
出处
《电视技术》
北大核心
2015年第12期45-50,共6页
Video Engineering
基金
国家自然科学基金项目(61471180)
湖北省自然科学基金项目(2013CFB188)
湖北省高等学校优秀中青年科技团队计划项目(T201431)
湖北省教育厅科研计划项目(B2015188)
文华学院培育基金项目(2013Y08)
关键词
无线通信
能效优化
协作中继
协作效率
中继选择算法
wireless communication
energy efficiency
cooperative relay
cooperative efficiency
relay selection algorithm
