带有负载均衡的LTE自适应切换算法  

Load balancing adaptive handover algorithm in LTE

作　　者：王汝言[1] 周晓军[1] 吴大鹏[1] 

机构地区：[1]重庆邮电大学宽带泛在接入技术研究所,重庆400065

出　　处：《系统工程与电子技术》2015年第9期2156-2163,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61371097);重庆市自然科学重点基金(CSTC2013JJB40001;CSTC2013JJB40006);重邮青年自然科学基金(A2012-93)资助课题

摘　　要：用户在宏蜂窝和毫微微蜂窝之间频繁执行不必要的切换将导致系统掉话率增加,用户服务质量和网络吞吐量降低。提出一种带有负载均衡的自适应切换算法,根据网络综合负载水平自适应调节切换滞后余量,结合网络容量、终端所需容量、接收信号强度、业务类型、移动速度等多目标参数进行综合切换判决。结果表明所提切换算法可有效避免不必要切换的发生,降低切换次数并提高网络吞吐量。The frequent and unnecessary handovers caused by the movement of user equipment （UE） be- tween Macro Cell and Femto Cell will reduce the quality of service （QoS） of UE and network throughput. A load balancing aware handover algorithm in long term evolution （LTE） is proposed, which adaptively updates han- dover hysteresis margin according to the comprehensive load level of network. Furthermore, multiple parame ters are comprehensively exploited to make the handover decision, such as the residual resource capacity of net- work, required resource capacity of UE, receiving signal strength, service type. Eventually, simulation results show that the proposed algorithm can effectively reduce the handovers and unnecessary handovers, thus the net work throughput can be improved.

关 键 词：宏蜂窝 毫微微蜂窝 负载均衡 切换 

分 类 号：TN929.533[电子电信—通信与信息系统]