Methods and apparatus for supporting IP multicast for a mobile router
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United States of America Patent
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Mar 18, 2008
Grant Date -
N/A
app pub date -
May 7, 2002
filing date -
May 7, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and apparatus for supporting a Mobile IP mobile router are disclosed. A method of establishing a multicast session, thereby enabling multicast IP data packets to be transmitted to the multicast mobile router, include registering the mobile router with its Home Agent. Upon receipt of a registration reply from the Home Agent, the mobile router sends a join host group message. The join host group messages specifies a multicast group address and requests that a source or rendezvous point send packets destined to the multicast group address to a Foreign Agent to which the multicast mobile router has roamed when the multicast group address is a global scope address. Thus, multicast IP data packets may be received from the Home Agent when the data packets are addressed to an administrative scope address, while multicast IP data packets are received from the Foreign Agent when the data packets are addressed to a global scope address.
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