基于子前导序列的IoT系统随机接入方案

doi:10.13190/j.jbupt.2018-175

北京邮电大学学报 ›› 2018, Vol. 41 ›› Issue (5): 110-114.doi: 10.13190/j.jbupt.2018-175

基于子前导序列的IoT系统随机接入方案

郭伯仁, 张欣, 杨鸿文

北京邮电大学信息与通信工程学院, 北京 100876

收稿日期:2018-08-05 出版日期:2018-10-28 发布日期:2018-11-20
作者简介:郭伯仁(1993-),男,博士生,E-mail:plume@bupt.edu.cn;杨鸿文(1964-),男,教授,博士生导师.
基金资助:
国家科技重大专项项目（2018ZX03001024-006）

A Random Access Scheme Based on Sub-Preambles for IoT Systems

GUO Bo-ren, ZHANG Xin, YANG Hong-wen

School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2018-08-05 Online:2018-10-28 Published:2018-11-20

摘要/Abstract

摘要： 为了降低物联网（IoT）系统中通信设备的平均接入时延，提高接入成功率，设计了一种适用于大量通信设备竞争接入的前导序列，并提出了相应的随机接入方案.该随机接入前导序列主要基于对原序列的频分复用，增加了可用的前导序列数量，从而降低了接入冲突概率，减少了接入冲突所造成的接入时延与物理上行共享信道资源的浪费.仿真结果表明，该随机接入冲突检测算法可以有效地降低IoT系统中通信设备的平均接入时延，提高通信设备的接入成功率.

关键词: 物联网, 随机接入, 冲突, 平均接入时延, 接入成功率

Abstract: A random access (RA) scheme based on sub-preambles is proposed to reduce average RA delay and improve RA success ratio for internet of thing (IoT) systems. Specifically, novel sub-preamble considering frequency division multiple access is designed. The sub-preambles are used to increase the number of available preamble sequences, so that preamble collision probability is reduced. Further, a RA scheme using sub-preambles is presented. However, the proposed RA scheme will alleviate the waste of resources caused by preamble collision. Compared with several RA schemes, simulation results show that the proposed approach can effectively reduce average delay and increase success ratio.

Key words: internet of thing, random access, preamble collision, average delay, success ratio

中图分类号:

TN929.53

郭伯仁, 张欣, 杨鸿文. 基于子前导序列的IoT系统随机接入方案[J]. 北京邮电大学学报, 2018, 41(5): 110-114.

GUO Bo-ren, ZHANG Xin, YANG Hong-wen. A Random Access Scheme Based on Sub-Preambles for IoT Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2018, 41(5): 110-114.

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基于子前导序列的IoT系统随机接入方案

A Random Access Scheme Based on Sub-Preambles for IoT Systems

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