通信学报 ›› 2014, Vol. 35 ›› Issue (12): 53-61.doi: 10.3969/j.issn.1000-436x.2014.12.007

• 学术论文 • 上一篇    下一篇

LTE系统中事件驱动M2M业务的流量控制随机接入协议

杨柳,范平志,郝莉   

  1. 西南交通大学 信息编码与传输省重点实验室,四川 成都 610031
  • 出版日期:2014-12-25 发布日期:2017-06-17
  • 基金资助:
    国家高技术研究发展计划(“863计划)基金资助项目;国家自然科学基金资助项目;教育部重大基金资助项目;中央高校基本科研业务费专题基金资助项目

Flow control random access protocol for event-driven machine-to-machine traffics in LTE network

Liu YANG,Ping-zhi FAN,Li HAO   

  1. Provincial Key Lab of Information Coding & Transmission,Southwest Jiaotong University,Chengdu 610031,China
  • Online:2014-12-25 Published:2017-06-17
  • Supported by:
    The National High Technology Research and Development Programme of China (863 Program);The National Natural Science Foundation of China;Key Grant Project of Chinese Ministry of Educa-tion;The Fundamental Research Funds for the Central Universities

摘要:

提出了一种LTE系统中事件驱动M2M业务的流量控制随机接入协议。采用贝塔分布对事件驱动M2M业务建模,通过统计一段时隙内的随机接入前导码空闲比来估计信道流量,从而设计控制因子进行流量控制。建模分析了采用该协议的系统吞吐量和时延性能,与目前在LTE系统中的随机接入协议的性能进行了对比。结果表明,该随机接入协议能够很好地估计系统负载,通过控制因子减少碰撞,从而显示出更好的系统性能。

关键词: 机器对机器, 事件驱动, LTE, 流量控制

Abstract:

A flow control random access protocol for event-driven machine-to-machine traffics in LTE network is pro-posed.The beta distribution is adopted to model the event-driven M2M traffics.This protocol uses the random access preamble free ratio in a fixed number of slots to estimate the channel load and calculate the flow control factor to control the flow.The throughput performance of the proposed protocol is modeled and analyzed,and compared with the random access protocol in LTE system.It is shown that the proposed protocol performs much better because it can estimate the system load accurately in most situations and reduce collision by flow control factor.

Key words: machine to machine, event-driven, LTE, flow control