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浙江大学学报(工学版)
浙江大学学报(工学版)  2019, Vol. 53 Issue (1): 99-106    DOI: 10.3785/j.issn.1008-973X.2019.01.011
计算机技术     
优先级区分服务的机载网络媒质接入控制协议
刘炜伦, 张衡阳, 郑博, 高维廷
空军工程大学 信息与导航学院, 陕西 西安 710077
Multi-channel media access control protocol with differential services in airborne network
LIU Wei-lun, ZHANG Heng-yang, ZHENG Bo, GAO Wei-ting
Information and Navigation College, Air Force Engineering University, Xi’an 710077, China
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摘要：

为了保障机载网络的系统容量及最高优先级业务严格的时效性与可靠性需求，提出区分优先级的媒质接入控制协议. 该协议对高、低优先级业务，分别采用多信道随机接入和多信道忙闲接入2种不同的信道接入策略，结合竞争窗口随信道忙闲程度自适应调整的退避机制，实现了多优先级区分服务. 通过建立多信道忙闲碰撞模型和退避模型，根据高优先级业务的QoS需求，计算求解不同信道数量下低优先级业务的最优负载取值区间和接入门限以及各项系统性能的数学表达式. 仿真结果表明，该协议不仅具有较高的系统容量（>10 Mb/s），而且能够保证高优先级业务严格的时效性（<2 ms）、可靠性（>99%）需求，与带差分服务的跳频MAC （PFH-MAC）协议和区分优先级的自适应抖动MAC （PAJ-MAC）协议相比，性能有较大的提升.
Abstract:

A differential priority based multi-channel media access control protocol was proposed in order to guarantee the system capacity and strict demands of timeliness and reliability on the high priority traffic in airborne networks. Two different channel access strategies were used which are multi-channel random access and multi-channel busy-idle access for high and low priority traffic respectively. A backoff mechanism based on the channel loads was adopted to dynamically adjust the connection window according to the busy degree of channels. Then differential service can be effectively provided. The optimal channel load interval and the access threshold of the low priority traffic in different number of channels as well as all system performance expressions were derived by establishing the multi-channel busy-idle collision model, backoff model and combining with the QoS demand of high priority traffic. The simulation results show that the protocol can ensure the strict timeliness (<2 ms), reliability (>99%) of high priority traffic and system capacity (>10 Mbit/s). The performance was improved much by comparing with priority frequency hopping (PFH-MAC) and prioritized adaptive jitter based media access control (PAJ-MAC) protocols.
收稿日期: 2018-05-28 出版日期: 2019-01-07
CLC:  TP393  
基金资助:

国家自然科学基金资助项目（61701521）；博士后科学基金资助项目（2016M603044）；航空科学基金资助项目（20150896010，20161996010）
通讯作者: 张衡阳,男,副教授.orcid.org/0000-0002-1711-2020.     E-mail: hareed@163.com
作者简介: 刘炜伦(1993-),男,硕士生,从事机载自组网的研究.orcid.org/0000-0002-0690-2035.E-mail:1197853086@qq.com
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引用本文:

刘炜伦, 张衡阳, 郑博, 高维廷. 优先级区分服务的机载网络媒质接入控制协议[J]. 浙江大学学报(工学版), 2019, 53(1): 99-106.

LIU Wei-lun, ZHANG Heng-yang, ZHENG Bo, GAO Wei-ting. Multi-channel media access control protocol with differential services in airborne network. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2019, 53(1): 99-106.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.01.011    或    http://www.zjujournals.com/eng/CN/Y2019/V53/I1/99

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