基于前导码重传辅助控制的mMTC动态随机接入

申滨; 章艳; 李昌淼; 曾裕

doi:10.11959/j.issn.2096-3750.2024.00377

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基于前导码重传辅助控制的mMTC动态随机接入

理论与技术 | 更新时间：2024-06-05

- 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
- 物联网学报 2024年8卷第1期页码：122-135
- 作者机构：
  
  1. 重庆邮电大学通信与信息工程学院，重庆 400065
  2. 移动通信技术重庆市重点实验室，重庆 400065
  3. 上海星思半导体有限责任公司，上海 201100
- 作者简介：
  
  [ "申滨（1978‒ ），男，博士，重庆邮电大学通信与信息工程学院教授，主要研究方向为下一代移动通信、大规模MIMO系统、认知无线电、海量机器类通信设备的随机接入等" ]
  [ "章艳（1999‒ ），女，重庆邮电大学通信与信息工程学院硕士生，主要研究方向为海量机器类通信设备的随机接入" ]
  [ "李昌淼（1998‒ ），男，重庆邮电大学通信与信息工程学院硕士生，主要研究方向为卫星场景下的通信同步、海量机器类通信设备的随机接入" ]
  [ "曾裕（1994‒ ），男，上海星思半导体有限责任公司工程师，主要研究方向为5G、6G移动通信技术" ]
- 基金信息：
  
  国家自然科学基金项目;The National Natural Science Foundation of China(62071078)
- DOI：10.11959/j.issn.2096-3750.2024.00377
  中图分类号： TN929.5
- 纸质出版日期：2024-03-30，
  
  网络出版日期：2024-03，
- 稿件说明：
移动端阅览
申滨, 章艳, 李昌淼, 等. 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.

BIN SHEN, YAN ZHANG, CHANGMIAO LI, et al. Preamble retransmission assisted control-based mMTC dynamic random access. [J]. Chinese journal on internet of things, 2024, 8(1): 122-135.
申滨, 章艳, 李昌淼, 等. 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. DOI： 10.11959/j.issn.2096-3750.2024.00377.

BIN SHEN, YAN ZHANG, CHANGMIAO LI, et al. Preamble retransmission assisted control-based mMTC dynamic random access. [J]. Chinese journal on internet of things, 2024, 8(1): 122-135. DOI： 10.11959/j.issn.2096-3750.2024.00377.

摘要

为解决海量机器类通信（mMTC

massive machine type communications）场景下，机器类通信设备（MTCD

machine type communication device）采用传统随机接入方案时，往往出现网络严重拥塞，导致大量MTCD无法成功接入网络问题，提出了一种基于前导码重传辅助的动态接入类别限制（PRT-ACB

preamble retransmission access class barring）方案。利用MTCD的前导码重传次数，将每个随机接入机会（RAO

random access opportunity）中尝试发起接入的MTCD划分为高、低优先级，结合每个RAO中负载数估计模型，分别为其设定随每个RAO中的接入负载动态变化的高、低优先级限制因子和可用前导码池，使更多MTCD能在未达到最大前导码传输次数前成功接入网络。仿真结果表明，所提方案能有效提升MTCD的接入成功概率，降低MTCD接入网络所需时延。所提方案可以作为缓解海量通信设备同时接入网络造成拥塞的一种解决方案。

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 payloads 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 maximum 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 attempting 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

Keywords

machine type communication devicerandom accesscongestion controlthe number of preamble retransmissions

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