NB-IoT随机接入过程的研究与实现"

Research and Implementation of NB-IoT Random Access Process

随机接入过程作为实现UE和网络端建立连接的重要过程,在NB-IoT系统中,它在LTE系统的基础上进行了相应的简化和修改。通过LTE-A系统和NB-IoT系统协议入手,对目前仅支持的基于竞争模式的随机接入过程进行了深入的分析和阐述,同时,也详细地分析NB-IoT中新增的Suspend-Resume过程,并具体介绍了随机接入过程的流程设计和实现。在SDL和TTCN协仿真平台上搭建了SDL功能块图,并生成了随机接入过程的MSC仿真图,验证了流程设计的正确性。

The random access process is an important process to establish the connection between the UE and the network.In the NB-IoT system,it is simplified and modified on the basis of the LTE system.Based on the LTE-A system and the NB-IoT system protocols,the random access based on competitive mode is analyzed and exposited in detail,and the Suspend-Resume process added in NB-IoT is analyzed thoroughly.The process design and implementation of random access process is introduced specifically.The SDL functional block diagram is built on the SDL and TTCN simulation platform,and the MSC simulation diagram of the random access process is generated to verify the correctness of the process design.