LTE系统中M2M业务随机接入优化方案  

Optimized random access mechanism for M2M service in LTE system

作　　者：施苑英[1] 卢光跃[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,西安710121

出　　处：《计算机应用研究》2013年第12期3742-3744,共3页Application Research of Computers

基　　金：国家科技重大专项基金资助项目(2012ZX03001025);西安邮电大学青年教师科研基金资助项目(ZL2013-08)

摘　　要：针对LTE系统中海量M2M终端同时接入引起的频繁碰撞问题,提出一种基于分组的解决方案。将同一小区内的M2M终端划分成组并引入组长节点,由组长代表本组发起接入请求,基站根据当前负荷情况分配接入资源并通过组寻呼触发组员节点的随机接入过程。理论分析和系统级仿真实验结果表明,相比LTE系统,现有的随机接入策略新方案在终端数量较多时能够有效减少碰撞次数,提高首次接入的成功概率。In order to avoid frequent collisions caused by simultaneous access of massive M2M terminals in LTE system, this paper proposed an optimized mechanism based on grouping. This scheme divided M2M terminals in one cell into groups and initiated access request by the leader of each group. Then the base station allocated access resources according to its current load conditions and triggered random access procedure of other members of the group by group paging. Theory analysis and system-level simulation results show that, compared with existing random access method employed by LTE, the new scheme can effectively reduce the number of collisions and improve the success probability of first time access.

关 键 词：随机接入 长期演进 机器对机器 分组 组长 组寻呼 

分 类 号：TN929.53[电子电信—通信与信息系统]