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Layered mobile multicasting method based on fast multicasting switching

A fast switching and multicast group technology, applied in the Internet field, can solve multicast overhead, routing efficiency and other issues, and achieve the effects of alleviating multicast tree jitter, ensuring stability, and alleviating multicast protocol overhead

Inactive Publication Date: 2008-01-30
TSINGHUA UNIV
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Problems solved by technology

This solution well solves the three major problems of multicast deployment in the mobile environment, namely, multicast overhead, routing efficiency, handoff delay and loss rate, and is a comprehensive and efficient mobile multicast solution

Method used

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  • Layered mobile multicasting method based on fast multicasting switching
  • Layered mobile multicasting method based on fast multicasting switching
  • Layered mobile multicasting method based on fast multicasting switching

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Embodiment Construction

[0046] We first introduce the general situation of the present invention.

[0047] Based on the remote join algorithm, FHMM proposes solutions to two major problems, handover delay, multicast maintenance and multicast tree jitter.

[0048] For the handover delay problem, FHMM proposes a fast multicast handover mechanism. It is based on the existing mobile IPv6 fast handover, and through proper expansion, the network has already processed the multicast correspondingly before the node is actually handed over to the new network, so as to realize the fast multicast handover. And the fast multicast switching mechanism can be used for both intra-domain switching and inter-domain switching.

[0049] For the problem of multicast overhead and multicast tree jitter, FHMM alleviates the problem by using hierarchical mobile multicast management. Through layering, the mobility of nodes can be shielded from the outside, and the switching of mobile nodes in the domain will not affect the b...

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Abstract

Through technique for interpreting multicast groups, by using regional multicast agent router as loot node, and by using regional multicast routers as branch nodes, multicast tree is built in domain in regional network. Thus, regional multicast agent manages multicast application in whole regional domain as well as switching mobile nodes in domain is shielded outside domain. Based on mobile IPv6 fast switch over protocol, through expanding use of option of multicast groups, the method realizes fast multicast switching mobile nodes inside and outside domain. Switching between domains is based on remote join mode in IPv6 protocol so as to guarantee approximative optimality of path for forwarding multicast. Meanwhile advantages including fast multicast switching, reducing switching delay and switching packet loss are realized.

Description

technical field [0001] A layered mobile multicast method based on fast multicast switching belongs to the technical field of the Internet, and in particular relates to multicast technology in a mobile environment. Background technique [0002] IP multicast has the advantages of saving network bandwidth, high efficiency, and saving the sender's own resources. On the other hand, the mobile environment often uses wireless networks, and bandwidth limitation has become one of the most important constraints. Therefore, it is more necessary in the mobile environment Use multicast technology: multicast can effectively save wireless network bandwidth and limited mobile device capabilities, and introduce more and better applications for mobile users; at the same time, multicast has also been more deployed and developed space. [0003] However, performing multicast in a mobile environment faces many new challenges. Existing multicast protocols only consider the static situation, and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/28H04W4/06
Inventor 吴建平吴茜徐明伟崔勇
Owner TSINGHUA UNIV
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