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LTE-A 异构网下一种基于移动性预测的切换方案

发表时间:2016-02-28  浏览量:2190  下载量:690
全部作者: 张丹昱,邹素玲,赵新胜
作者单位: 东南大学移动通信国家重点实验室;大唐移动通信设备有限公司移动通信事业部
摘 要: 针对LTE-A 异构网(heterogeneous network, HetNet)系统中因接收信号强度受到信道快速衰落的影响而导致的提前切换、滞后切换、乒乓切换等问题,提出了基于移动性预测的切换方案。该方案在两种不同的移动场景下,根据用户的移动性规则,选择有效的预测算法,为用户的切换进行目标小区的预先选择和资源预留,缩短切换流程。仿真结果表明,两种移动场景下的移动性预测算法的准确率最高可达98%. 相比于以A3事件判别目标切换小区的传统LTE-A切换方案,本方案可以提高LTE-A HetNet系统的切换性能,切换时延减少了30 ms或60 ms,总切换次数下降了4.35%,切换失败率降低了7.44%.
关 键 词: 通信技术;移动性预测;资源预留;切换时延;切换失败率
Title: A handover scheme based on mobility prediction for LTE-A heterogeneous networks
Author: ZHANG Danyu, ZOU Suling, ZHAO Xinsheng
Organization: National Mobile Communications Research Laboratory, Southeast University; Mobile Communications Division of Datang Mobile Communications Equipment Co. Ltd.
Abstract: To solve the problem of too early handover, too late handover and ping-pong handover caused by the fast fading of the received signal in the LTE-A heterogeneous network (HetNet) system, this paper proposed a handover scheme based on mobility prediction. The proposed scheme chooses the effective prediction algorithm based on the user’s mobility rule in two different mobile scenarios, selects the target cells and reserves the resources for the handover process of the user in advance. Simulation results show that the accuracy rate of two mobile scenarios’ mobility prediction algorithm is 98%. Compared to the traditional LTE-A handover scheme which selects the target cell based on the A3 event, the proposed handover scheme can improve the handover performance of LTE-A HetNet system, with the handover delay being reduced by 30 ms or 60 ms, the total handover frequency is decreased by 4.35%, and the handover failure rate is reduced by 7.44%.
Key words: communication technology; mobility prediction; resource reservation; handover delay; handover failure rate
发表期数: 2016年2月第4期
引用格式: 张丹昱,邹素玲,赵新胜. LTE-A 异构网下一种基于移动性预测的切换方案[J]. 中国科技论文在线精品论文,2016,9(4):339-348.
 
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