可靠多播传输协议.pdf

2012 年第 07 期,第 45 卷通信技术 ,,2012
总第 247 munications Technology ,Totally

可靠多播传输协议研究

王翔
(海司信息化部驻成都地区军事代表室,四川成都 610041)

【摘  要】战术通信网需要多播技术以支持多种组播应用,如情形感知、任务协作等。无线通信可为战
术通信网组播通信提供支持,但其可靠性不高,不能直接应用,必须加以控制。为此,研究了一种利用 IP
多播路由和转发服务提供端到端可靠数据传输协议,即面向否定确认的可靠多播协议(NORM)。深入分析了
NORM 协议的反馈确认、拥塞控制、包级 FEC 等关键技术。在结论与展望中,提出了这一领域的难点和对今
后工作的展望。
【关键词】前向纠错编码;可靠多播传输;战术通信网;面向否定确认的可靠多播
【中图分类号】        【文献标识码】A        【文章编号】1002-0802(2012)07-0007-03 

Study on Reliable Multicast Transport Protocol

WANG Xiang
(Military Representative Office in Chengdu, Informationization Section of Navy
Headquarters, Chengdu Sichuan 610041, China)

【Abstract】Multicast technology is required in work for supporting the multicast
applications, such as situational awareness and task collaboration. munication could
provide support for the multicast in munications, but for its unreliability it could
not be directly applied in practice if without any control. Thus, a Negative-ACKnowledgment (NACK)
Oriented Reliable Multicast (NORM) protocol is proposed, which could provide reliable end-to-end
data transportation over generic IP multicast routing and forwarding services. This paper analyzes
in detail the key techniques of NORM protocol, including acknowledgment mechanism, congestion
control, packet-level FEC and so on, then gives the research diff