LTE-A异构网中双连接技术的切换流程设计与实现

Design and implementation of dual connectivity process in heterogeneous network based on LTE-A

3GPP在LTE-A异构网络中提出双连接技术是为了增强型小小区,终端同时连接到Me NB(Master e NB)和Se NB(Secondary e NB)可以提高单个用户的吞吐量和移动的强健性,用户吞吐量的提升是通过聚合至少两个基站的无线资源实现的。其中Me NB主要负责信令的传输和移动性管理,Se NB主要实现的是对数据的分流。提供了双连接技术的应用场景,在架构上实现了用户平面和控制平面的分离,设计了双连接场景下的切换流程以及搭建了基于TTCN-3(Testing and Test Control Notation version 3)测试系统的终端无线资源管理(Radio Resource Management,RRM)一致性测试平台,并对流程设计进行了验证。

3GPP hava proposed dual connectivity technique in LTE-A heterogeneous network for enhanced small cell, the terminal connected to the MeNB and SeNB simuhaneously per-user＇ s throughput and the mobility robustness, per-user throughput is ob- tained by connecting to two eNBs at least to aggregate radio resources. MeNB, which is mainly responsible for the transmission of signalings and mobility management, SeNB main achievement is split-data. This article provides scenarios dual connection tech- nology on architecture enables separation of user and data planes, the design of dual connectivity scenarios is built radio resource management （RRM） conformance testing platform which is based on terminal TTCN-3,and test the process.