发明公开
- 专利标题: Handover from E-UTRAN to UTRAN/GERAN CS
- 专利标题(中): 从E-UTRAN切换到UTRAN / GERAN CS
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申请号: EP08100048.1申请日: 2008-01-03
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公开(公告)号: EP1983796A1公开(公告)日: 2008-10-22
- 发明人: Bennett, Andrew , Palat, Sudeep , Tatesh, Said , Drevon, Nicolas , Thiebaut, Laurent , Casati, Alessio
- 申请人: Alcatel Lucent , Lucent Technologies Inc.
- 申请人地址: 54 rue La Boétie 75008 Paris FR
- 专利权人: Alcatel Lucent,Lucent Technologies Inc.
- 当前专利权人: Alcatel Lucent,Lucent Technologies Inc.
- 当前专利权人地址: 54 rue La Boétie 75008 Paris FR
- 代理机构: Schmit Chretien Schihin & Mahler
- 优先权: GB0707387 20070417
- 主分类号: H04Q7/38
- IPC分类号: H04Q7/38 ; H04L29/06 ; H04L12/56 ; H04L12/28
摘要:
The present invention relates to a method for a handover of a UE (User Equipment) currently engaged in a voice call. More particularly, the invention relates to a handover from 1) a packet based radio where Voice Service is provided via VoIP over the radio and is controlled via Session Initiation Protocol (SIP) based signalling (e.g. LTE, E-UTRAN or WIMAX radio) to 2) a radio access network where Voice Service can be only provided via circuit switched (CS) domain (a visited mobile switching centre (VMSC) is needed) such as legacy 3GPP UMTS Terrestrial Radio Access Network (UTRAN)/ GSM/Edge Radio Access Network (GERAN) coverage. A MSC-S entity acting as a Packet Core Control Node on a Packet Switched (PS) network and as an Anchor Visited Mobile Switching Centre (VMSC) for a handover to a Circuit Switched (CS) network on the CS domain side is proposed, the MSC-S preparing a new path with a remote UE-B and a CS domain handover towards a target legacy radio coverage before requesting a UE-A to execute the handover.
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