Enabling foreign network multicasting for a roaming mobile node, in a foreign network, using a persistent address
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United States of America Patent
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Jan 24, 2012
Grant Date -
Jun 26, 2008
app pub date -
Mar 3, 2008
filing date -
Jun 14, 2001
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Abstract
Permitting a mobile host to roam in a foreign network, with multiple access node handoffs, while permitting foreign network multicasting by (i) having the mobile node (MN) use a persistent address, for purposes of multicasting, and (ii) relaxing or modifying reverse path forwarding checks, and (iii) modifying the forwarding of multicast packets sent from a non-local source address. The persistent address, used in mobile networks as the source address in the IGMP Membership reports and the multicast packets, may be the permanent and hence stable host home address (HoA). This enables the HoA to be supported as a source address by foreign agents (FAs) and multicast routing protocols in foreign networks.
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