Patent ID: 8195835
Filing Date: 2012-06-05
Classification: H04L,H04W

Abstract:
1. A method of migrating from a current endpoint address to a new endpoint address by a migrator during a session between the migrator and a non-migrator in a packet-based communication system, the method comprising the steps of: (a) changing, in the migrator, the current endpoint address to the new endpoint address; (b) suspending transmission to the non-migrator of packets with the new endpoint address; (c) informing the non-migrator, via a channel separate from the channel of the session between the migrator and the non-migrator, of the change to the new endpoint address; and (d) resuming transmission to the non-migrator of packets with the new endpoint address, wherein the step of suspending transmission of packets to the non-migrator at the transport layer comprises preventing or resolving a race condition by applying one or more firewall-filtering rules to prevent session data from leaving the system until the migration process is complete.