发明名称 |
METHOD AND APPARATUS FOR COMPUTING ALTERNATE MULTICAST/BROADCAST PATHS IN A ROUTED NETWORK |
摘要 |
<p>Alternate multicast/broadcast paths may be calculated in a routed network to enable broadcast/multicast traffic to be transmitted around a local failure in the routed network until the routing system reconverges on a new network topography. According to an embodiment of the invention, the nodes on a multicast tree or a broadcast tree may compute alternate paths for each of the downstream nodes in the multicast/broadcast tree or for select nodes in the multicast/broadcast tree. The select nodes may be those nodes that have advertised membership in the multicast or a set number of hops downstream on the branch affected by the failure. The alternate paths may be unicast paths from the node to the other nodes on the multicast/broadcast tree. U-turn nodes may be used where there is no regular loop-free alternate network path to a node on the downstream multicast/broadcast tree.</p> |
申请公布号 |
WO2008052339(A1) |
申请公布日期 |
2008.05.08 |
申请号 |
WO2007CA01955 |
申请日期 |
2007.11.01 |
申请人 |
NORTEL NETWORKS LIMITED;ZHANG, HONG;YIN, GUOLI;ASHWOOD SMITH, PETER |
发明人 |
ZHANG, HONG;YIN, GUOLI;ASHWOOD SMITH, PETER |
分类号 |
H04L29/14;H04L12/18;H04L12/24 |
主分类号 |
H04L29/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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