LTE-A系统中基于CoMP的下行跨层功率分配优化方法  

Cross layer power allocation optimization method based on CoMP down link in LTE-A Sysyem

作　　者：朱国晖[1] 李佳蔚[1] 赵季红[1] 

机构地区：[1]西安邮电学院,通信与信息工程学院,陕西西安710061

出　　处：《计算机工程与设计》2012年第10期3702-3707,共6页Computer Engineering and Design

基　　金：国家自然科学基金项目(60872058)

摘　　要：为了降低长期演进技术增强(long term evolution-advanced,LTE-A)网络中资源分配时的功率消耗,提高小区边缘用户频谱利用率,提升系统吞吐量,提出了LTE-A网络中基于下行协作多点传输(coordinated multi-point transmission/reception,CoMP)技术的跨层功率分配优化方法。该方法在传统功率分配方法的基础上引入了联合处理(joint processing/transmission,JP)技术,并对其进行了分析;接着将无线链路控制(radio link control,RLC)层的用户队列状态信息情况考虑到物理层的功率分配算法模块中,建立了新的跨层功率分配方案,并且使用了遗传算法对该方案进行求解;仿真结果表明和传统的几种方法比较起来,有效提高了小区平均频谱效率和边缘频谱效率,减少了功率浪费。In order to reduce power consumption in allocating network resources in Long Term EvolutiowAdvanced network, im- prove the edge area user ＂s spectrum efficiency and the system＇s throughput, it provided a cross layer power allocation optimiza- tion method based on downlink CoMP （coordinated multi-point transmission/reception） technology in LTE-A network. This method use Joint processing/transmission from traditional power allocation method , and analyze this technology, then user＇s queue status information in RLC Layer are considered into the power allocation algorithm module in physical layer, then it estab- lish a new cross layer power allocation scheme and use genetic algorithm to check this scheme, finally simulation result shows that the proposed scheme can improve the edge users; frequency spectrum efficiency and the cell average spectrum efficiency, re- duce the waste of the power resources compared with other traditional methods.

关 键 词：长期演进技术增强 功率分配 跨层 基于联合处理技术的跨层功率分配方法 遗传算法 

分 类 号：TN929.5[电子电信—通信与信息系统]