Patent ID: 8358602

Claim:
A method of communicating with multiple gateways comprising: receiving a first point to point protocol (PPP) configuration request message including a first packet data network ID (PDN-ID) and access point name (APN) information at a serving gateway; setting up a connection from the serving gateway to a first packet data network gateway (PGW), thereby setting up a first PDN session; sending a first PPP configuration acknowledgement message including a first PDN-ID; creating a first new instance in the PPP with the first PDN-ID; subsequent to creating the first new instance, receiving a second PPP configuration request message including a second PDN-ID at the serving gateway; setting up a second PDN session; and creating a second new instance in the PPP with the second PDN-ID, thereby providing two PDN sessions that are simultaneously available at the serving gateway beyond a handover phase.