异构网中载波聚合系统的成员载波选择和干扰协同  

Interference Coordination by Component Carrier Selection for Carrier Aggregation System in Heterogeneous Networks

作　　者：孙长印[1] 姜静[1] 卢光跃[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,西安710121

出　　处：《电讯技术》2012年第12期1887-1892,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61102047);教育部新世纪优秀人才支持计划(NCET-08-0891);陕西省自然科学基金资助项目(2011JQ8027);陕西省教育厅自然科学基金项目(11JK1021)~~

摘　　要：为了解决下一代演进移动通信系统在异构网场景由于低功率基站在高功率基站覆盖区域的随意分布而导致的小区间干扰问题及容量速率限制,提出了一种载波聚合系统的成员载波选择和干扰协同方法。该方法基于修正的载波公平比例准则,动态地在小区间协同选择成员载波。为了进一步提高低功率节点的系统容量,设计了新的基于调和平均数的用户小区选择准则及算法。仿真结果表明,与频率复用因子为1的系统相比,设计的方法由于静默了部分高功率节点用户成员载波,从而使低功率节点用户获得更多的选择机会,可提高低功率节点小区的容量。The evolved next generation wireless system with frequency reuse one suffers from the performance loss due to the interference between Macro cell and Pico cell in heterogeneous networks. This paper presents interfer- ence coordination scheme by component carrier selection that dynamically selects the component carrier coordi- nately among the cells in the carrier aggregation system. The scheme reserves the proper portion of carriers dur- ing which the Macro nodes are partially deactivated allowing the users of Pico cell to be served with lower inter- ference. To further improve the cell-edge performance, new user cell association by the harmonic mean rate met- ric is also proposed. Simulation results show that the proposed scheme can achieve high cell-average and celledge throughput for the Pico cell in the heterogeneous networks.

关 键 词：异构网 载波选择 小区间干扰 小区选择 

分 类 号：TN929.53[电子电信—通信与信息系统]