Method for multicast employing single static bidirectional sharing tree in flexible wire type tunnel |
Title： |
| Method for multicast employing single static bidirectional sharing tree in flexible wire type tunnel |
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Application Number： |
200710177965 |
Application Date： |
2007/11/23 |
Announcement Date： |
2008/04/09 |
Pub. Date： |
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Publication Number： |
101159659 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04L 12/46, H04L 12/56, H04L 29/06 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Cui Yong, Xu Mingwei, Wu Jianping, Tang Xiuhui |
Key Words： |
multicast, single static, bidirectional sharing tree, flexible wire type tunnel |
Abstract： |
The invention relates to a method for multicasting using a single static bidirectional tree in a a flexible channel, belonging to a method for exterior-IP (E-IP) traversing interior-IP (I-IP) in flexible channel for multicasting grouped retransmission. The method is characterized in that a static bidirectional sharing tree is constructed in a retransmission network with all provider edge (PE) routers as leaf nodes according to bidirectional PIM (BIDIR-PIM) protocol, and its rendezvous point (RP) is a provider router (P-router) configured according to strategy; all designated forwarders (DFs) on each link circuit of RP are listed; when performing multicasting grouped retransmission, the PE router encapsulates the DF, and all the I-IP destination addresses after encapsulation are addresses of RP; the PE router retransmits the grouping after encapsulation to the RP, and each DF of the RP retransmits the multicasting grouping to all other PR routers; the PE router receiving the grouping judges whether the destination address of this grouping in its connected client network, if yes, receives, decapsulates and retransmits, and if no, directly discards the grouping. By the method, the I-IP network does not require to maintain (S, G) state and the memory space of the router is saved. |
Claim： |
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Priority： |
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PCT： |
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