Patent ID: 8780800
Filing Date: 2014-07-15
Classification: H04W

Abstract:
1. A method for establishing by a mobile node an additional session via a connection to a packet data network in a mobile communication network, the mobile node being attached to an access network, the method comprising: bootstrapping, in response to a trigger to establish the additional session via the packet data network connection, with a packet data network gateway to thereby obtain a home address prefix from the packet data network gateway, wherein the packet data network gateway connects the mobile node to the packet data network, wherein the mobile node uses an IP address configured at the mobile node for the access network prior to the trigger to establish the additional session as its identifier during bootstrapping, tunneling IP data packets of said additional session to the packet data network gateway using the IP address configured at the mobile node prior to the trigger to establish the additional session as the source address of the IP header encapsulating the IP data packets of the additional session, receiving after bootstrapping a router advertisement advertising an address prefix from an access router and comparing the advertised address prefix to the home address prefix obtained by the mobile node through bootstrapping with the packet data network gateway to perform a home link detection, wherein, in case the router advertisement is advertising an address prefix identical to the home address prefix obtained by the mobile node through bootstrapping with the packet data network gateway, the mobile node is transmitting, in response to receiving the router advertisement, IP data packets of said additional session to the packet data network gateway using a home address configured according to the obtained home address prefix as the source address of the IP data packets of said additional session, stopping tunneling IP data packets of said additional session to the packet data network gateway, and wherein the home address configured according to the obtained home address prefix is different from the IP address configured for the access network prior to the trigger to establish the additional session.