Co-existing static and dynamic IP multicast
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United States of America Patent
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Mar 18, 2014
Grant Date -
Nov 23, 2006
app pub date -
May 17, 2005
filing date -
May 17, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method are provided for providing both static and dynamic IP multicasting. When a router receives a PIM message or an IGMP message, the router determines whether the group specified in the message is within the multicast Static-Range. If the group pertains to a static multicasting group, the router does not propagate the message to upstream routers and only connects or disconnects interfaces internal to the router. If the multicast group address in the message is not within the multicast Static-Range, the router implements PIM or IGMP protocols. If the invention is used for broadcasting TV, the low end of TB channels or commonly used channels can be created as static IP multicast. This way, a user can access or leave such channels without an entire shortest path tree being created or torn down, improving access time and channel surfing for a user.
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