Patent ID: 8885599

Claim:
A method, comprising: during an ongoing call of a wireless user terminal in one of a circuit switched domain or a packet switched domain, initiating a handover procedure; setting parameters allowing the other domain to determine the actual resources needed to continue the call in said other domain, and sending an indication of these parameters towards a network element of said other domain, wherein the parameters are related to a granted quality of service (QoS) and include data rate, modulation and coding scheme, and one or more frequency channels; and completing the handover procedure, where when the ongoing call is in the circuit switched domain completing the handover procedure results in handing over the ongoing call to the packet switched domain, and when the ongoing call is in the packet switched domain completing the handover procedure results in handing over the ongoing call to the circuit switched domain; wherein the circuit switched domain comprises a GERAN network, and wherein the packet switched domain comprises an E-UTRAN network; wherein in the GERAN network the handover procedure is accomplished in part by a resource allocation request made via a Gb interface between a base station system and a serving general packet radio system support node, or via a Gs interface between a mobile switching center and a serving general packet radio system support node; and wherein the handover procedure is accomplished in part by signaling conducted over an S 3 interface between a serving general packet radio system support node of the GERAN network and a mobility management entity of the E-UTRAN network.