发明名称 |
Method and system for improved PS to CS handover of a user equipment |
摘要 |
A Mobile Switching Center, MSC, an Access Transfer Control Function, ATCF, an Access Transfer Gateway, ATGW and respective methods therein are provided for performing a packet-switched, PS, to circuit-switched, CS, handover of a User Equipment, UE, are provided. When the UE is handed over from a PS communication network to a CS communication network, the MSC requests the ATCF controlling the ATGW to bi-casting to both the CS communication network and the PS communication network, and forwarding speech data from the UE to a remote terminal with which the UE is communicating during the PS to CS handover procedure. Once the UE is handed over, the bi-casting and the forwarding are terminated. |
申请公布号 |
US9622118(B2) |
申请公布日期 |
2017.04.11 |
申请号 |
US201214443217 |
申请日期 |
2012.11.16 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (publ) |
发明人 |
Melin Lena;Speks Oliver |
分类号 |
H04W36/34;H04W36/00;H04L29/06;H04W36/02;H04W36/14;H04W36/38 |
主分类号 |
H04W36/34 |
代理机构 |
Rothwell, Figg, Ernst & Manbeck P.C. |
代理人 |
Rothwell, Figg, Ernst & Manbeck P.C. |
主权项 |
1. A method performed by a Mobile Switching Centre, MSC, operable to be comprised in a circuit-switched communication network for performing a packet-switched to circuit-switched handover of a User Equipment, UE, from a packet-switched communication network to the MSC, the method comprising:
receiving, from a Mobility Management Entity, MME, a request for handover of the UE, transmitting, to an anchor node in an IP Multimedia Subsystem, IMS, a request to start bi-casting to both the circuit-switched communication network and the packet-switched communication network and to start forwarding speech data from the UE to a remote terminal with which the UE is communicating in response to the received handover request, the anchor node in the IMS comprising an Access Transfer Control Function, ATCF, transmitting a relocation request to a target Radio Access Network, RAN, receiving, from the target RAN, a relocation complete message, and transmitting, to the anchor node in the IP Multimedia Subsystem, IMS, a request to stop bi-casting to both the circuit-switched communication network and the packet-switched communication network and to stop forwarding speech data from the UE to the remote terminal with which the UE is communicating in response to the received relocation complete message. |
地址 |
Stockholm SE |