Patent ID: 8706113
Filing Date: 2014-04-22
Classification: H04W

Abstract:
1. A method comprising: receiving at a control node in a network an attach message from a mobile node for attaching the mobile node to the network to enable the mobile node to send and receive calls, wherein the attach message indicates whether the mobile node can fallback from a first radio access technology to a second radio access technology and includes location information identifying a location of the mobile node and wherein the attach message is received via the first radio access technology; based on the attach message, generating at the control node a location update message including the location information, the location update message conformant with first interface procedures; translating the location update message to be conformant with second interface procedures to form a translated location update message using an interworking function; sending the translated location updated message to a remote switching device; receiving at the control node from the mobile node via the first radio access technology a service request message requesting for an outgoing voice call via the second radio access technology; based on the service request message and the indication that the mobile node can fallback from the first radio access technology to the second radio access technology, setting up at the control node a voice call between the mobile node and the remote switching device for the outgoing voice call via the second radio access technology; receiving at the control node a paging request from the remote switching device, the paging request conformant with the second interface procedures and regarding an incoming voice call directed to the mobile node; translating the paging request to be conformant with the first interface procedures to form a translated paging request using the interworking function; based on the translated paging request and the location information, paging the mobile node from the control node regarding the incoming voice call; receiving, at the control node a page response from the mobile node; and based on the page response and the indication that the mobile node can fallback to the second radio access technology, setting up a voice call between the mobile node and the remote switching device for the incoming voice call via the second radio access technology.