摘要： 对TD-LTE系统随机接入过程进行分析，提出一种基于前导码优先级的随机接入前导码选择控制算法，增加基于优先级的前导码，由专用用户优先使用，由此减少系统广播资源，降低接入时延，提高接入成功率，解决碰撞问题。仿真结果证明，该算法可提高网络不同负载情况下的接入成功率。

关键词: 随机接入, 前导码, 分配方案, 优先级, 广播资源, 接入成功率

Abstract: According to the analysis of the random access process, considering that TD-LTE system random access preamble choice and assignment plan, this paper proposes a kind of control algorithm based on the priority level of the random access preamble selectivity. By increasing the preamble based on the priority level, the dedicated users can use this priority level. This algorithm can reduce the system broadcast resources and adapt scenes of different call arrive rate. Simulation result indicates that this algorithm can raise the access success ratio of the different load.

Key words: random access, preamble, assignment scheme, priority level, broadcast resource, access success ratio

中图分类号: 

• TN929.5