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总览 评价 陈淑靖 1, , 周辉阳 2,* ( 1、 北京邮电大学大学信息与通信工程学院,北京 100876 ; 2、 北京邮电大学大学信息与通信工程学院,北京 100876; ) 摘要: 在高密度的小小区网络中由于小区半径变窄,因此当用户移动时切换就会频繁的发生。为了提高
陈淑靖1,, 周辉阳2,*
(
1、 北京邮电大学大学信息与通信工程学院,北京 100876 ; 2、 北京邮电大学大学信息与通信工程学院,北京 100876; )
摘要:
在高密度的小小区网络中由于小区半径变窄,因此当用户移动时切换就会频繁的发生。为了提高切换性能,提出了一种新的两步邻区列表选择算法(TSNS).第一步,算法基于目标小区的负载,信号质量以及资源利用率更新基站侧的邻区列表。第二步,用户基于实际收到的信号质量,生存时间和移动方向来计算用户侧的邻区列表排名。最终的邻区列表的优先权是这两步的综合。相比于现有的算法对所有的用户采用同样的邻区列表,本算法的创新之处在于不同的用户根据自己的实际情况拥有不同的邻区列表。仿真结果表明新算法能得到更短的邻区列表同时保证更好的切换质量。
关键词:
邻区列表,小小区,邻区切换,移动方向,优先级,系统容量
CHEN Shu-Jing1,, ZHOU Hui-Yang2,*
(
1、 Department of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876 ; 2、 Department of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876; )
Abstract:
In dense small cell networks, the coverage of a typical cell is small and handover is expected to happen frequently when user moves. Thus a two stage neighboring cell list (NCL) selection (TSNS) algorithm is proposed to improve handover performance. In the first stage, TSNS updates cell specific preferences of neighboring cells based on the load, signal quality and resource utilization of the target cells. In the second stage, user specific preference is calculated considering the received signal quality, surviving time and moving direction of user. Cell specific and cell user specific preferences are merged to construct the resultant NCL. Compared with existing methods which adopt the same NCL for all users in a cell, the novelty of TSNS is that different users can have different NCLs. Simulation results prove that TSNS can yield short NCL list while ensuring good handover performance.
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