物联网学报2024，Vol.8Issue(1)：122-135,14.DOI:10.11959/j.issn.2096-3750.2024.00377
基于前导码重传辅助控制的mMTC动态随机接入
Preamble retransmission assisted control-based mMTC dynamic random access
摘要
Abstract
To address the issue of severe network congestion in the scenario of massive machine-type communications(mMTC),where machine-type communication devices(MTCD)employing traditional random access schemes often encountered challenges leading to a large number of MTCD failing to access the network successfully,a novel approach called preamble retransmission-based dynamic access class barring(PRT-ACB)was proposed.By utilizing the number of MTCD preamble retransmissions,the MTCD attempting to initiate access in each random access opportunity(RAO)were categorized into different sets of high and low priority.In conjunction with an estimation model for the number of pay-loads in each RAO,high and low-priority limiting factors and available preamble pools were dynamically adjusted based on the access load in each RAO.This allowed more MTCD to successfully access the network before reaching the maxi-mum number of preamble transfers.Simulation results have demonstrated that the proposed scheme effectively enhances the MTCD successful access rate and reduces the time delay required for MTCD to access the network.The proposed scheme can serve as a solution to alleviate the congestion caused by a massive influx of communication devices attempt-ing simultaneous network access.关键词
机器类通信设备/随机接入/拥塞控制/前导码重传次数Key words
machine type communication device/random access/congestion control/the number of preamble retransmissions分类
信息技术与安全科学引用本文复制引用
申滨,章艳,李昌淼,曾裕..基于前导码重传辅助控制的mMTC动态随机接入[J].物联网学报,2024,8(1):122-135,14.基金项目
国家自然科学基金项目(No.62071078) The National Natural Science Foundation of China(No.62071078) （No.62071078）
