应急通信系统中快速二层切换协议的设计与实现

doi:10.11959/j.issn.1000-436x.2017260

通信学报 ›› 2017, Vol. 38 ›› Issue (Z2): 8-16.doi: 10.11959/j.issn.1000-436x.2017260

应急通信系统中快速二层切换协议的设计与实现

李方敏^1,²,曾乐²,沈逸²,张韬¹()

¹ 长沙学院计算机工程与应用数学学院，湖南长沙 410022
² 武汉理工大学信息工程学院，湖北武汉 430070

出版日期:2017-11-01 发布日期:2018-06-07
作者简介:李方敏（1968-），男，湖南涟源人，博士，长沙学院教授、博士生导师，主要研究方向为无线网络通信与智能感知、机器学习与大数据处理。|曾乐（1991-），男，四川泸州人，武汉理工大学硕士生，主要研究方向为无线网络通信。|沈逸（1993-），男，浙江湖州人，武汉理工大学硕士生，主要研究方向为无线网络通信。|张韬（1979-），男，湖北襄阳人，博士，长沙学院讲师，主要研究方向为无线网络通信与智能感知、机器学习与大数据处理。
基金资助:
国家自然科学基金资助项目(61373042);长沙市科技计划基金资助项目(ZD6101004)

Design and implementation of a layer-II fast handoff protocol in emergency communication system

Fang-min LI^1,²,Le ZENG²,Yi SHEN²,Tao ZHANG¹()

¹ School of Computer Engineering and Applied Mathematic,Changsha University,Changsha 410022,China
² School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China

Online:2017-11-01 Published:2018-06-07
Supported by:
The National Natural Science Foundation of China(61373042);Changsha Science and Technology Project(ZD6101004)

摘要/Abstract

摘要：

传统的应急通信系统存在机动性差、网络带宽窄、对实时型业务支持较差等问题；更为严重的是，当移动终端在应急通信系统的多个骨干节点间移动时，其较大的切换时延和固定的触发切换判决门限严重限制了高速传输的数据业务。针对这一现状，设计了适用于快速切换环境的采用多频分层分簇网络结构的应急通信系统，并提出一种适用于该网络结构的快速二层切换协议，以满足应急通信系统中终端的实时型业务数据传输对越区切换的严格要求，根据终端的移动速率自适应调整触发切换判决门限。

关键词: 应急通信, 快速二层切换, 速率自适应

Abstract:

Immobility,limited bandwidth and poor support to real-time service are common shortcomings in traditional emergency communication system.Moreover,the data transmission speed is highly limited in high-speed services by the long handoff delay and fixed handoff trigger threshold when the mobile terminals moving between network nodes.In order to overcome these shortcomings,a new emergency communication system with multifrequency hierarchical clustering structure was designed.A new layer-II fast handoff protocol was designed for such network structure to deal with handoff issue in real-time services.In this handoff protocol,the handoff trigger threshold is self-adaption based on the moving velocity of mobile terminals.

Key words: emergency communication, layer-II fast handoff, rate adaptation

中图分类号:

TP393

李方敏,曾乐,沈逸,张韬. 应急通信系统中快速二层切换协议的设计与实现[J]. 通信学报, 2017, 38(Z2): 8-16.

Fang-min LI,Le ZENG,Yi SHEN,Tao ZHANG. Design and implementation of a layer-II fast handoff protocol in emergency communication system[J]. Journal on Communications, 2017, 38(Z2): 8-16.

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切换方式	切换时分组丢失率	非切换时分组丢失率	总分组丢失率
传统切换方式	59.38%	0.63%	9.14%
本文切换方式	0	0.75%	0.64%
文献[16]	—	—	6%
文献[15]	—	—	0%

应急通信系统中快速二层切换协议的设计与实现

Design and implementation of a layer-II fast handoff protocol in emergency communication system

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