摘要
NB-IoT技术中的UE只有少量上下行数据的传输,消耗的工作带宽也更小,现有的随机接入过程不能很好地适用于NB-IoT上。本文首先对NB-IoT特性进行研究,NB-IoT不要求支持连接态切换功能、定位功能,也不支持PUCCH信道。NB-IoT使用随机接入过程的应用场景被简化,同时NB-IoT只支持基于竞争的方式,再对LTE中的随机接入过程进行研究。最后在LTE中基于竞争的随机接入过程的基础上,针对NB-IoT的特性对每个步骤进行必要的优化,使随机接入过程更适用于NB-IoT网络,同时使效率更高、消耗的功率更低。
In the NB-IoT technology,the UE transmits only a small amount of uplink and downlink data,and consumes less working bandwidth.The existing random access procedure can not be applied to the NB-IoT well.NB-IoT is not required to support the connection state switching function,positioning function,PUCCH channel is not supported,NB-IoT use of random access process scenarios are simplified,while NB-IoT only supports Based on the contention-based approach,the random access procedure in LTE is studied.Based on the contention-based random access procedure in LTE,the necessary optimization for each step is finally performed according to the characteristics of NB-IoT,so that random access The ingress process is more suitable for NB-IoT networks,while making the efficiency even higher and consuming less power.
作者
曾丽丽
ZENG Lili(Anhui University of Science and Technology,Huainan 232001,China)
出处
《现代信息科技》
2018年第1期176-177,共2页
Modern Information Technology
