Patent ID: 9521591
Filing Date: 2016-12-13
CPC Classification: H04W

Claim Text:
1. A communication system comprising: a Long Term Evolution (LTE) access network including a control node, an evolved Node B (eNB), and a Home evolved Node B (HeNB); and a 3G femto network including an Internet Protocol Multimedia System (IMS) and a femto cell base station, wherein: the IMS includes a virtual Mobile Switching Center (MSC) for causing the control node to recognize a server in the IMS as a MSC during communication with the control node; the virtual MSC transfers and receives a message of control information for line switching with the control node during the line switching between the eNB and the femto cell base station, and between the HeNB and the femto cell base station; the virtual MSC causes the control node to recognize the server in the IMS as the MSC by using a predetermined protocol; the protocol is a Session Initiation Protocol (SIP); the server is a SIP server; and the control node includes: