面向差异化MTC场景需求的随机接入方案

doi:10.11959/j.issn.1000-436x.2020222

Abstract

Abstract:

For the different random access requirements of the mixed scenarios of ultra-reliable low latency (URLLC) and massive machine type communications (mMTC) in MTC,a random access scheme based on devices grouping was proposed.The proposed scheme divided the MTC devices into several groups based on the timing advance (TA) information:for the URLLC scenario,preamble resources were reserved for core devices in each group,and the URLLC devices accessed the network via the contention-free mechanism,to satisfy the ultra-reliable low latency access requirement; for the mMTC scenario,the base station utilized the different TA information in different group to identify devices selecting the same preamble,and performed successive interference cancellation (SIC) algorithm to detect the data information,to satisfy the massive access requirement.Simulation results demonstrate that the proposed scheme can significantly increase the number of the successful devices.

Key words: MTC, device grouping, SIC, TA, massive access

CLC Number:

TN929.53

Zhefu WU,Xinyuan YANG,Wenchao ZHAI,Huimei HAN. Random access scheme for different MTC scenario requirement[J]. Journal on Communications, 2020, 41(11): 176-184.

Figures/Tables 6

References 17

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