基于效用最大的多小区异构网络调度和功率控制方法  

Utility-Based Maximized Scheduling and Power Control in Multi-Cell Heterogeneous Networks

作　　者：董全[1] 李建东[1] 赵林靖[1] 闫继垒[1] 陈睿[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室西安710071

出　　处：《计算机学报》2014年第2期373-383,共11页Chinese Journal of Computers

基　　金：国家自然科学基金重点项目(61231008);国家自然科学基金(61072068,61301168);国家“九七三”重点基础研究发展规划项目基金(2009CB320404);长江学者和创新团队发展计划项目(IRT0852);国家重点实验室专项基金(ISN01080301);高等学校创新引智计划(B08038);陕西省自然科学基础研究计划(2013JQ8001);中央高校基本科研业务费专项资金项目(K50511010008,K5051201001)资助~~

摘　　要：为了在任何时间任何地点给移动用户提供无缝的网络接入和可靠的QoS保证,网络融合成为当前研究的热点.为了使异构网络在接纳用户时获得最大的效用,该文提出了一种多小区异构网络接纳方法.该方法分配给用户合适的网络和传输功率,以最大化全网的效用.文中对效用联合的优化问题进行分步求解,降低了模型求解的复杂度,进一步,文中对不同制式的网络做了不同的处理:对于时分系统,文中方法采用联合匈牙利方法 (Joint Hungarian method,JOHG)获得基站与用户的关联和基站对用户的传输功率;对于码分系统,采用机会接入和多用户的注水定理方法(Opportunistic Scheduling Multiple Water Filling,OSMWF)获得基站子信道与用户的关联和子信道的发送功率.仿真结果表明,与现有的几种接入方式相比,该文所提的方法能获得最大的接入效用.In order to provide mobile users with seamless wireless access and guaranteed quality of service （QoS） anywhere and anytime, to integrate different kinds of networks into heterogeneous networks becomes a hot spot. In order to have a maximized utility of heterogeneous networks for accessing users, a utility-based heterogeneous networks access method had been proposed. Proper networks and transmission power are allocated for users by this method for having the maximized utility. A step by step method had been used to solve the utility based joint optimiza tion problem, greatly reduces the complexity of the model. Furthermore, different methods had been used to solve different types of networks： for time-division system, a method called JOHG is used to allocate users association and power; for code-division system, a method called OSMWF is used to allocate users association and power of sub channel. Simulation results show that the proposed method can get the most access utility compared with existing access methods.

关 键 词：异构网络 网络选择 效用 多小区中图法 

分 类 号：TN929[电子电信—通信与信息系统]