Method and system for circuit switched fallback, server and mobile terminal

A voice phone and mobile terminal technology, applied in electrical components, wireless communication, etc., can solve problems such as inability to guarantee voice call quality, unfavorable IMS service deployment, call failure, etc.

Active Publication Date: 2016-06-01
NANJING COOLPAD SOFTWARE TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, whether to choose CSFB mode or SRVCC mode needs to be configured on the mobile terminal side, which is not conducive to the deployment of IMS services: if the mobile terminal configuration does not support IMS services, the mobile terminal must Initiate CSFB through the OTA (OverTheAir, "Over The Air" technology used by mobile terminals such as mobile phones) signaling on the LTE network. Then, with the gradual maturity of IMS service deployment on the network side, it will take a lot of time and effort to upgrade mobile termin

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  • Method and system for circuit switched fallback, server and mobile terminal
  • Method and system for circuit switched fallback, server and mobile terminal
  • Method and system for circuit switched fallback, server and mobile terminal

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[0040] In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0042] figure 1 A schematic flowchart of a method for voice call fallback according to an embodiment of the present invention is shown.

[0043] Such as figure 1 As shown, the method for voice call ...

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Abstract

The invention provides a method for circuit switched fallback, a CSCF (Call Session Control Function) server, a mobile terminal, a mobility management entity and a system for circuit switched fallback. The method comprises the following steps of receiving protocol signaling for initiating VoLTE (Voice over LTE) voice service from the mobile terminal; determining whether to send a service query command to the mobility management entity of the mobile terminal according to the protocol signaling; and receiving a query result from the mobility management entity and sending a circuit switched fallback command to the mobile terminal according to the query result in order to make the mobile terminal execute a circuit switched fallback operation. Through the technical scheme of the invention, the mobile terminal can be effectively guided to execute the circuit switched fallback operation to guarantee continuity of a voice call, so that the voice call quality of the mobile terminal supporting IMS (IP Multimedia Subsystem) service is effectively improved, the user experience is promoted, and meanwhile, an LTE (Long Term Evolution) network can select the voice communication mode of the mobile terminal according to the current network state.

Description

technical field [0001] The present invention relates to the technical field of terminals, in particular to a voice call fallback method, a CSCF server, a mobile terminal, a mobility management entity and a voice call fallback system. Background technique [0002] In the case that the current LTE (Long Term Evolution, Long Term Evolution) network coverage is incomplete and the IMS (IP Multimedia Subsystem, IP (Internet Protocol, Internet Protocol, interconnection protocol) multimedia system) service has not been fully developed, in order to ensure the voice service of mobile terminals Reliability, the LTE network provides CSFB (CircuitSwitchedFallback, voice call fallback) and SRVCC (SingleRadioVoiceCallContinuity, dual-mode single-standby wireless voice call continuity) two technologies. [0003] In the related technology, when the mobile terminal or the LTE network cannot support the IMS service, the mobile terminal falls back to 2G from the LTE network through the Voice Ca...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W36/14H04W36/18
CPCH04W36/14H04W36/0066H04W36/18
Inventor 张志刚黄伟
Owner NANJING COOLPAD SOFTWARE TECH
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