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Circuit switched fallback method and terminal

A circuit domain fallback and terminal technology, which is applied in the communication field and can solve the problems such as CSFB failure of the CS service of the mobile terminal.

Inactive Publication Date: 2018-10-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this solution, the mobile terminal supports more frequency bands, and it takes more time for the mobile terminal to search the network. When the search time for all frequency bands exceeds the preset value, the CS service CSFB of the mobile terminal fails.

Method used

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  • Circuit switched fallback method and terminal
  • Circuit switched fallback method and terminal
  • Circuit switched fallback method and terminal

Examples

Experimental program
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Embodiment Construction

[0046] Embodiments of the present application provide a CS fallback method and terminal, which are used to shorten the search time of the CS fallback process, so as to improve the success rate of CS fallback.

[0047] In order to enable those skilled in the art to better understand the solutions of the present application, the following will describe the embodiments of the present application with reference to the drawings in the embodiments of the present application.

[0048] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the term "comprisi...

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Abstract

The embodiment of the invention discloses a circuit switched fallback method and a terminal, and is used for shortening the searching time of a circuit switched fallback process so as to improve the success rate of circuit switched fallback. The method disclosed by the embodiment of the invention comprises the following steps of: acquiring a prior frequency point by a terminal; the terminal searching for a cell meeting the resident condition according to the prior frequency point; and if the terminal searches for a cell meeting the resident condition within a preset duration, the terminal residing in a cell corresponding to the prior frequency point

Description

technical field [0001] The present application relates to the communication field, and in particular to a circuit domain fallback method and terminal. Background technique [0002] In the existing network environment, the fourth generation mobile communication technology (4Generation, 4G), the third generation mobile communication technology (3Generation, 3G) and the second generation mobile communication technology (2Generation, 2G) networks exist at the same time, if the mobile terminal does not support For the voice over long term evolution (VOLTE) service based on the long-term evolution technology, the circuit switched (CS) service of the mobile terminal needs to fall back from the circuit switched fallback (CSFB) of the 4G network to the 3G network or 2G network. Finish. For example, from the 4G time division long term evolution (TD-LTE) network circuit domain back to the universal mobile telecommunications system (universal mobile telecommunications system, UMTS) net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/14
CPCH04W36/00224H04W60/00
Inventor 汤超姜印清黄凯阮攀
Owner HUAWEI TECH CO LTD