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Handover from E-UTRAN to UTRAN/GERAN CS

A UE-A, MSC-S technology, applied in communication between multiple stations, radio/inductive link selection arrangement, electrical components, etc.

Inactive Publication Date: 2008-10-22
ALCATEL LUCENT SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This allows handoffs to be handled before disconnection, and so there is minimal interruption of user detection to the voice service

Method used

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  • Handover from E-UTRAN to UTRAN/GERAN CS
  • Handover from E-UTRAN to UTRAN/GERAN CS

Examples

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Embodiment Construction

[0048] In Fig. 1a and Fig. 1b, a flow diagram of a handover embodiment according to the invention is shown. This flowchart represents UMTS / UTRAN entities and messages, but it applies to GERAN entities and messages as well.

[0049] According to the embodiment of the invention shown in Figures 1a and 1b, for UE-A handover from E-UTRAN to UTRAN / GERAN CS, the following messages are sent and operations are performed:

[0050] 1 - eNB requests UE-A to perform measurements on neighbor cells.

[0051] 2-UE-A performs measurements and sends measurement reports to eNB.

[0052] 3- The eNB determines that handover to UTRAN or GERAN CS domain should be performed. It sends a Relocation / Handover Required message to the MME, indicating the target cell and that it is a handover to the CS domain.

[0053] 4-MME selects MSC-S in the same PLMN (Public Land Mobile Network) and relays the relocation / handover required message to the MSC-S node.

[0054] 5- Since MSC-S is located in the same PL...

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Abstract

The invention relates to switchover from E-UTRAN to UTRAN / GERAN CS. The invention relates to a switch method of UE (user equipments) used for currently taking part in voice calling. Particularly, the invention relates to the switchover from (1) wireless based on grouping (such as LTE, E-UTRAN or WIMAN wireless), wherein, a voice service is provided through the wireless via VOIP and is controlled to (2) a wireless access network via a signaling based on a session initiation protocol (SIP), wherein, the voice service can only be provided via circuit switching (CS) domain (needing visited mobile services switching center (VMSC)), such as traditional 3GPP UMTS Terrestrial Radio Access Network (UTRAN) / GSM / EDGE Radio Access Network (GERAN) overlay. The invention discloses a MSC-S entity. The entity acts as a grouping core control node on Packet Switching network and acts as the anchor visited mobile services switching center (VMSC) for the switchover of the circuit switching (CS) network on the CS domain side, wherein, MSC-S is suited to prepare for switching with a new route of remote UE-B and the CS domain to the target traditional wireless overlay.

Description

technical field [0001] The present invention relates to a handover method for a UE (User Equipment) currently participating in a voice call. More particularly, the present invention relates to a handover from 1) a packet-based wireless (e.g., LTE, E-UTRAN or WIMAN wireless) to 2) a wireless access network in which voice services are delivered over wireless via VOIP Provided and controlled via the signaling-based Session Initiation Protocol (SIP), voice services in the radio access network can only be provided via the Circuit Switched (CS) domain (requiring an accessible Mobile Switching Center (VMSC)), such as traditional 3GPP UMTS Terrestrial Radio Access Network (UTRAN) / GSM / Edge Radio Access Network (GERAN) coverage. This application applies in particular to the case where the UE cannot transmit / receive simultaneously on two radio accesses. Background technique [0002] In the prior art (3GPP TS 23.206), it is assumed that the UE is able to transmit / receive simultaneousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/26H04W36/14
CPCH04W36/0022H04W36/00224
Inventor A·J·本内特A·卡萨蒂N·德雷峰S·K·帕拉特S·塔特什L·蒂鲍特
Owner ALCATEL LUCENT SAS
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