Patent ID: 9319958
Filing Date: 2016-04-19
CPC Classification: H04W

Claim Text:
1. A method for providing a handover of a session between a User Equipment (UE) in a Long Term Evolution (LTE) network and another UE to a session between the UE in a Circuit Switching (CS) network and the another UE by a call manager in a wireless communication system, the method comprising: receiving, by the call manager, from an Enhanced Node B (ENB) of the LTE network, a handover required message for a Packet Switching (PS) to CS handover from the LTE network to the CS network, when the PS to CS handover is decided based on measurement reports of the UE; sending, by the call manager, to a Mobile Switching Center (MSC) of the CS network, a PS to CS handover request message including an International Mobile Subscriber Identity (IMSI) for identifying the UE and a target IDentifier (ID) for a target cell of the CS network; receiving, by the call manager, a PS to CS handover response message from the MSC; and sending, by the call manager, to the UE via the ENB, a handover command message, wherein the call manager communicates with the LTE network and the CS network.