Unlock instant, AI-driven research and patent intelligence for your innovation.

Circuit switching fallback method and device

A circuit-switched fallback and packet-switched technology, applied in electrical components, connection management, wireless communications, etc., to solve problems such as long call setup times

Active Publication Date: 2019-11-05
HUAWEI TECH CO LTD
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a circuit switching fallback method and device, which are used to solve the problem that the call establishment time is too long when the calling or called UE undergoes communication system switching

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit switching fallback method and device
  • Circuit switching fallback method and device
  • Circuit switching fallback method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0059] The following is an explanation of the words that this application refers to or may refer to:

[0060] At least one means one, or more than one, that is, including one, two, three and more.

[0061] Carrying may mean that a certain message is used to carry certain information or data, or it may mean that a certain message is composed of certain information.

[0062] In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more. In addition, it should be understood that, in the description of the embodiments of the present application, words such as “first” and “second” are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative im...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a circuit switching fallback method and device, and the method comprises the steps: receiving a first request transmitted by a first communication system through UE after a calling process is initiated; after the UE is transferred to the second communication system, before it is determined that a first message from a second communication system is received, if UE determinesthat a voice call bearer cannot be established in the second communication system, enabling the UE to initiate a CSFB in the second communication system, wherein the first message is used for the UE to determine that the call request fails, so that the UE can perform the CSFB in the second communication system without waiting for the first message sent by the network side of the second communication system, and the call waiting time is shortened.

Description

[0001] This application claims the priority of the Chinese patent application filed on April 26, 2018 with the application number of 201810385818.8 and the application title of "a method, terminal and device for call establishment", the entire contents of which are incorporated by reference in in this application. technical field [0002] The present application relates to the field of mobile communication technologies, and in particular, to a circuit-switched fallback method and device. Background technique [0003] In the prior art, circuit switched fallback (CSFB) refers to the switching of a user equipment (UE) from a 4G communication network to a circuit switched (CS) domain of a 3G communication network or a CS domain of a 2G communication network for voice communication. call plan. [0004] At present, if the UE making a call or being called in the 5G communication system switches to the 4G communication system, the UE cannot establish a call in the 4G communication ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04W36/00
CPCH04W36/00224H04W36/0079H04W76/27H04W36/0022H04W60/00H04W68/005
Inventor 金辉窦凤辉庄宏成方平
Owner HUAWEI TECH CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com