An improved random access procedure for M2M communications
An improved random access procedure for M2M communications
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DOI：
10.1109/wcnc.2016.7564738
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发表时间：
2016-04
期刊：
影响因子：
--
通讯作者：
Ningbo Zhang
中科院分区：
文献类型：
--
作者：
Ningbo Zhang
本文提出了一种改进的随机接入（RA）过程的机器到机器（M2M）通信。所提出的RA过程使得演进节点B（eNB）在第一步骤中检测前导码是否被多个用户设备（UE）选择。为了避免错误检测，在PRACH中提供扩展的保护频带。基于改进的RA过程，对前导冲突概率和成功接入次数进行了理论分析。在仿真中，仿真了不同比特数的UE ID的误检测概率、成功接入次数以及前导冲突的影响。仿真结果表明，新的RA过程优于传统的RA过程的前导冲突的概率和成功接入的数量。
This paper proposes an improved random access (RA) procedure for machine to machine (M2M) communications. The proposed RA procedure makes evolved nodeB (eNB) detect if a preamble is selected by multiple user equipments (UEs) in the first step. To avoid false detection, an extended guard band is provided in PRACH. Based on the improved RA procedure, theoretical analysis on the probability of preamble collision and the number of successful access are addressed. In the simulation, the simulation of the probability of false detection with different number of bits of UE ID, the number of successful access and the impact of preamble collision are presented. Simulation results show that the new RA procedure outperforms traditional RA procedure on both probability of preamble collision and the number of successful access.