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Method, system and correlation method and equipment for establishing voice call backing to CS domain

A voice call and system message technology, applied in the field of communication, can solve problems such as no deployment, GSM network does not support PShandover and DTM, and limits the flexibility of LTE deployment

Active Publication Date: 2011-06-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early deployment stage of LTE, IMS may not be deployed, and most GSM networks do not support PS handover and DTM
Moreover, the limited mapping relationship between TA / TA list and LA limits the flexibility of LTE deployment

Method used

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  • Method, system and correlation method and equipment for establishing voice call backing to CS domain
  • Method, system and correlation method and equipment for establishing voice call backing to CS domain
  • Method, system and correlation method and equipment for establishing voice call backing to CS domain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1: In order to reduce the time delay for a mobile terminal to reselect from an LTE cell to a 2G / 3G cell and establish a voice call, a method of triggering and updating LA during the TA update process is adopted. Neither scheme A nor scheme B requires a restricted mapping relationship between TA / TA list and LA. For solution A, the implementation method is similar to the prior art. For solution B, the LA update message is forwarded by the Mobility proxy between the MME and the MSC. From the perspective of the MSC, the BSS / RNS simulated by the Mobility proxy is included in the LA. The update process of TA and LA is as follows: image 3 .

[0052] When the TA update process is triggered, the mobile terminal judges whether to update the LA according to the trigger condition of the LA, and if necessary, complete the update of the LA during the TA update process. During the LA update process, the message exchange between the MME and the Mobility is through the S3'...

Embodiment 2

[0054] Embodiment 2: A mobile terminal residing in an LTE cell is notified by a broadcast system message or a dedicated signaling message whether the voice call of the cell is transferred to the CS domain of the 2G / 3G cell to establish a voice call, and if so, whether it is Both calling and called voice calls are transferred to the CS domain of the 2G / 3G cell. Such as Figure 4 (a), through the broadcast system information notification method, the voice calls of all mobile terminals in the LTE cell will be transferred to the 2G / 3G cell or not transferred.

[0055] Such as Figure 4 (b) By means of dedicated signaling, such as handover messages, measurement control messages, cell change / update messages, paging messages, etc., it is possible to notify a specific mobile terminal to transfer a voice call to the 2G / 3G CS domain to establish a voice Call or don't reselect.

Embodiment 3

[0056] Embodiment 3: The mobile terminal resides in an LTE cell, and the mobile terminal wants to initiate a voice call of the calling party. According to the previously broadcast system message or dedicated signaling, the information about whether the voice call is established to the CS domain of the 2G / 3G cell is obtained. Indicates whether to transfer to a 2G / 3G cell. The mobile terminal in the LTE_IDLE state establishes the caller's voice call in the CS domain of the 2G / 3G cell, such as Figure 5 As shown, the specific steps include:

[0057] 51. The mobile terminal is in the LTE_IDLE (idle state) state and wants to initiate a calling voice call.

[0058] 52. The previously broadcast system message or dedicated signaling indicates that the voice call is to be established in the CS domain of the 2G / 3G cell, and the mobile terminal reselects to the 2G / 3G cell, monitors the broadcast message of the 2G / 3G cell and camps in the cell.

[0059] 52a. If the LA of the cell where ...

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Abstract

The embodiment of the invention relates to the field of telecommunication, and provides a method, a system and related equipment for establishing voice calls through returning back to a CS territory. Instructions are transmitted to mobile terminals through a network, and the mobile terminals are reelected to a plot with the CS territory; and voice calls are established in the CS territory of the plot. The embodiment of the invention solves the technical problem that the mobile terminals establish voice calls through returning back to the CS territory of the plot under the conditions that the mobile terminals stay in the plot of the pure PS territory network, and the pure PS territory network can not support voice calls.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, system and related equipment for returning to a CS domain to establish a voice call. Background technique [0002] After years of deployment, 2G / 3G (second-generation mobile communication technology / third-generation mobile communication technology, generally referring to GSM and WCDMA networks) networks can be regarded as a comprehensive coverage to some extent. Today, with the development of technology, SAE / LTE (System Architecture Evolution / Long Term Evolution), HSPA (High Speed ​​Packet Access), HSPA+ (High Speed ​​Packet Access Evolution) and WiMAX (Worldwide Interoperability for Microwave Access) networks have covered some In this way, in the current communication network, these networks coexist with 2G / 3G networks. For convenience of description, SAE / LTE, HSPA, HSPA+, WiMAX, etc. that only provide PS (Packet Switching) domains are collectively referred to as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W76/02
CPCH04W76/02H04W76/10
Inventor 王济勇余勇军赵旸陈德吴晓波段小琴张戬
Owner HUAWEI TECH CO LTD