Patent ID: 8880705
Filing Date: 2014-11-04
Classification: H04W

Abstract:
1. A method for mobile communications, the method comprising: receiving from a mobile device a request to add a second IP interface type to a current communication session associated with a first IP interface type, wherein the second IP interface type is different from the first IP interface type; requesting from a local mobility anchor (LMA) associated with the home network of the mobile device a set of IP addresses of the second IP interface type; receiving from the LMA a set of IP addresses of the second IP interface type; establishing for the mobile device one or more IP flows of the second IP interface type using one or more received IP addresses; associating the one or more new connections of the second IP interface type with the current communication session for the mobile device; receiving from the mobile device a request to terminate one or more IP flows; generating a proxy binding update (PBU) message listing one or more IP addresses associated with active IP flows and listing one or more excluded IP addresses associated with the one or more terminated IP flows, wherein the listing of one or more excluded IP addresses from the PBU message indicates that the one or more excluded IP addresses are released; sending the generated PBU message to the LMA associated with the home network of the mobile device; receiving from the LMA a proxy binding acknowledgement (PBA) message with a list of IP addresses remaining allocated to the mobile device; determining if one or more IP addresses that were not excluded in the PBU message are excluded in the PBA message, and treating the one or more IP addresses excluded in the PBA message as an unsolicited IP address release by the LMA; and releasing the one or more IP addresses excluded in the PBU message and the one or more IP addresses excluded in the PBA message.