Method of multicasting for mobile host used in any one of subnetworks connected to one another
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United States of America Patent
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May 29, 2001
Grant Date -
N/A
app pub date -
Feb 24, 1998
filing date -
Feb 24, 1997
priority date (Note) -
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Abstract
An originator selects at least one sub-network from a plurality of sub-networks to establish a scope of a multicast group and multicasts group characteristic information, which includes a specific group identifier to the scope. The sub-networks include nodes to accept a mobile host. The mobile host is related to one of the nodes to be managed by it. Each node receives the group characteristic information when it is in the scope and judges whether or not to transfer the group characteristic information to the mobile host in response to the content of the group characteristic information. The mobile host judges where the group characteristic information is sent from when it receives the group characteristic information. Then the mobile host judges whether or not the originator admits the mobile host to participate in the multicast group on the basis of the group characteristic information.
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