Mobile multicast routing optimizing method
An optimization method and multicast technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as multicast tunnel aggregation and unoptimized routing, improve utilization, reduce routing inefficiency, and reduce transmission overhead. Effect
Active Publication Date: 2010-08-11
北京地平线轨道技术有限公司
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[0020] The purpose of the present invention is to avoid the deficiencies in the above-mentioned prior art and provide a mobile multicast routing optimization method, aiming at the non-optimized routing and multicast tunnel in the existing mobile multicast method when using tunnels to transmit multicast data. aggregation and other issues, the present invention proposes a mobile multicast routing optimization method to improve routing efficiency in existing mobile multicast methods and improve multicast routing efficiency
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[0038] The scheme of the present invention is mainly applicable to mobile IPv6 multicast and mobile IPv4 multicast using configured care-of address by introducing multicast tunnel on home agent and merging and reconstructing multicast routing optimization algorithm.
[0039] When the mobile multicast method uses bidirectional tunnels to transmit multicast data, if multiple mobile nodes joining the same multicast group move to the same foreign network and connect to the same access router, tunnel aggregation will occur. At this time, the home agent builds multiple tunnels to the mobile node to send the same multicast data, which causes serious overhead and affects the efficiency of multicast routing. According to the distribution of home agents, the problem of tunnel aggregation in mobile multicast can be divided into two cases, as shown in Figure 1. In the first case, the mobile node has different home agents, and each mobile establishes a tunnel with its own home agent to tra...
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The invention relates to a mobile multicast route optimization method, comprising: realizing multicast tunnel combined reconstruction multicast route optimization algorithm on hometown agents, constructing and maintaining mobile node lists, member lists and transmitting interface lists by the hometown agent. The method comprises that: the hometown agent initializes three lists, acquires mobile node information to generate mobile node list from binding buffer memory; the hometown agent intercepts bound update information and update the mobile node list, detects whether the mobile node with thesame transmission address prefixing are present in the mobile node; the hometown agent detects whether a tunnel is present accessed to the router before the mobile node; the hometown agent stops uploading the multicast data between the mobile node and the hometown network if finding that the mobile node with the same prefixing is added to the same multicast group. The invention increases utilanceof the network resource, reduces transmission cost of the mobile multicast method.
Description
technical field [0001] The invention relates to the mobile multicast technology of the mobile Internet, in particular to a mobile multicast routing optimization method. The multicast routing is optimized by introducing the multicast tunnel merging and reconstruction algorithm on the home agent, and the efficiency of multicast routing is improved. Background technique [0002] Mobile multicast is developed based on mobile IP and multicast, and it can provide important services such as mobile video conferencing. Mobile multicast needs to solve two problems, one is group member relationship management, and the other is group member mobility management. Group membership management generally uses Internet Group Management Protocol IGMP (Internet Group Management Protocol) or multicast interception to find MLD errors! Reference source not found. protocol, and group member mobility management requires link layer such as IEEE802.11 and network layer such as mobile IPv6 (Mobile IP...
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IPC IPC(8): H04W40/02H04L12/56
Inventor 张宏科周华春关建峰刘颖
Owner 北京地平线轨道技术有限公司