【摘要】 为了减少时延、增加数据传输率,根据业务自适应特征,引入两种触发切换需求,分别从测量控制、切换判决和切换执行三方面对3GPP规范的LTE切换过程加以改进。根据基站邻居列表缩小测量范围,使用层次分析法进行多参数切换判决,在终端与源基站保持连接时进行与目标基站的同步接入。仿真表明此优化机制减少了切换延时,增加了数据传输速率,并有效地提高了切换效率和全网利用率。更多还原

【Abstract】 According to the features of adaptive business,the proposed mechanism improved handover performance by introducing two handover triggers for receiving less delay and higher data rate.The handover mechanism was improved from the following three aspects:measurement control,handover decision and handover execution.Firstly,the source eNodeB reduced the measurement range by using a neighbor eNodeB list.Secondly,made the handover decisione based on the results of analytic hierarchy process,which calculated multiple parameters into one decision.Finally,UE executed random access procedures to the target eNodeB while it maintained the connection to the source eNodeB simultaneously.Compared to the handover algorithms defined by 3GPP,the simulation results illustrate that the proposed method achieves less delay,higher data rate,higher handover efficiency,and better utilization of network resources.更多还原