Patent ID: 6765892
Filing Date: 2004-07-20
Classification: H04L,H04W

Abstract:
A Foreign Agent that supports Mobile IP, the Foreign Agent being configured to establish a data path between the Foreign Agent and a Home Agent, the data path being adapted for transmission of multicast IP data packets from the Home Agent to the Foreign Agent to enable the multicast IP data packets to be transmitted to one or more mobile nodes visiting the Foreign Agent, the Foreign Agent comprising:a processor; and a memory, the memory storing therein the following instructions: instructions for receiving an information request associated with a host membership report sent from a mobile node, the host membership report specifying a multicast group address identifying a host group to which the mobile node belongs; and instructions for providing information identifying a Home Agent associated with the mobile node to a multicast router process in response to the information request, the information identifying the Home Agent thereby enabling the multicast router process to send a join host group message to the Home Agent, the join host group message specifying the multicast group address and requesting that the Home Agent accept and deliver subsequently arriving multicast data packets destined to the multicast group address to the Foreign Agent.