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Circuit Switched Fallback (CSFB) calling method and device

A circuit domain fallback and call method technology, applied in electrical components, wireless communication, etc., can solve problems such as failure of called services, failure to find MSCPoolMSC, etc., and achieve a simple effect

Active Publication Date: 2017-03-08
中国移动通信集团重庆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the NNSF logical entity of the MSC Pool in the CS network cannot find the MSC where the UE previously resided in the MSC Pool
The UE cannot complete the CSFB called service through the MSC where it previously camped, that is, the called service fails this time

Method used

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  • Circuit Switched Fallback (CSFB) calling method and device
  • Circuit Switched Fallback (CSFB) calling method and device
  • Circuit Switched Fallback (CSFB) calling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The embodiment of the present invention provides a CS domain fallback call method, which is applied to the MSC side, such as figure 1 As shown, the processing flow of the method of this embodiment includes the following steps:

[0052] Step 101, after a paging failure, when the networking status is MSC Pool networking, determine the user identifiers used for secondary paging on the SGs interface as IMSI and TMSI.

[0053] For a UE that supports the CSFB function, when the UE is in the LTE network, the MME device selects an MSC through the SGs interface to allow the UE to perform CS registration and camping; when other UEs call the UE, the UE that the UE previously camped on The MSC will send a paging message to the MME.

[0054] When the MSC performs paging through the SGs interface for the first time, a paging message sent by the MSC will carry the user identifier IMSI and TMSI of the UE. When the MME receives a paging message, it can find the corresponding user reco...

Embodiment 2

[0079] The embodiment of the present invention also provides a circuit domain fallback call method, such as Figure 4 As shown, the processing flow of the method of this embodiment includes the following steps:

[0080] Step 401: When the first paging fails, the MSC where the UE resides determines the user ID for the second paging on the SGs interface according to the networking status.

[0081] For a UE that supports the CSFB function, when the UE is in the LTE network, the MME device selects an MSC through the SGs interface to allow the UE to perform CS registration and camping; when other UEs call the UE, the UE that the UE previously camped on The MSC will send a paging message to the MME.

[0082] When the MSC performs paging through the SGs interface for the first time, a paging message sent by the MSC will carry the user identifier IMSI and TMSI of the UE. When the MME receives a paging message, it can find the corresponding user record through the IMSI carried in the...

Embodiment 3

[0104] The embodiment of the present invention provides a kind of MSC, such as Figure 5 As shown, the MSC includes: a determining unit 501 and a first sending unit 502; wherein,

[0105] Determining unit 501 is used to determine that the user identification used for secondary paging of the SGs interface is International Mobile Subscriber Identity IMSI and Temporary Identity Code TMSI after a paging failure, when the networking state is MSC Pool networking;

[0106] The first sending unit 502 is configured to send a secondary paging message carrying the user identifier for secondary paging of the SGs interface determined by the determining unit 501 through the SGs interface.

[0107] The determining unit 501 is also used to configure the user identification for the secondary paging of the A interface or the Iu interface as IMSI; the determining unit 501 is further configured to determine that the user identifier used for secondary paging on the SGs interface is IMSI when the ...

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Abstract

The embodiment of the invention discloses a Circuit Switched Fallback (CSFB) calling method. The method comprises the following steps: after the failure of primary paging, when a networking status is Mobile Switching Center (MSC) Pool networking, determining that subscriber identifiers for secondary paging of a SGs interface are International Mobile Subscriber Identity (IMSI) and Temporary Mobile Subscriber Identity (TMSI); and sending secondary paging messages carrying the subscriber identifiers for the secondary paging of the SGs interface through the SGs interface. The embodiment of the invention further discloses a CSFB calling device.

Description

technical field [0001] The present invention relates to CSFB (Circuit Switched Fallback) technology, in particular to a CSFB calling method and device. Background technique [0002] CSFB is a communication technology that provides voice services based on a circuit domain (CS, Circuit Switched) network. When a user equipment (UE, User Equipment) under the coverage of a long-term evolution (LTE, Long Term Evolution) network processes voice services, the UE can first fall back to the The CS network handles voice services in the CS network, so that the existing CS equipment can be reused to provide traditional voice services for UEs in the LTE network. [0003] With the increase of the number of LTE users, the connection success rate of CSFB calls has become an important aspect affecting customer perception. For a UE that supports the CSFB function, when the UE is in the LTE network, the Mobility Management Entity (MME, Mobility Management Entity) device selects an MSC in the M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W68/00
CPCH04W36/14H04W68/00
Inventor 蔡锴肖继岚李军柏田田刘松柏蔡征耘范静崔立军
Owner 中国移动通信集团重庆有限公司
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