Patent ID: 8369284
Filing Date: 2013-02-05
Classification: H04W

Abstract:
1. A method for maintaining connectivity between user equipment and multiple PDN connections during an idle mode handover from a source network operating under the 3GPP communications protocol to a target network operating under a non- 3GPP communications protocol, comprising the steps of: receiving a connection request message at an access node on target network from the user equipment, said connection request message establishing the presence of said user equipment with the target network and including an indication that multiple PDN connections are currently in use by the user equipment; transmitting a request message from the access node on the target network to a home subscriber storage entity on a home network assigned to the user equipment; receiving a response message from the home subscriber storage entity on the home network assigned to the user equipment at the access node on the target network, said response message including the addresses for all PDN gateways currently in use by the user equipment; transmitting the multiple PDN gateway addresses to a control entity on the target network so that access can be established with the multiple PDN gateways to maintain the PDN connections with the user equipment after the handover of user equipment communications to the target network.