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CSFB call establishment method and device

A technology for call establishment and user equipment, which is applied in the field of communication and can solve the problems of voice call establishment time extension and other issues

Active Publication Date: 2020-02-14
王素英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, compared with the CS voice service of the 2G / 3G network or the voice service of the LTE network, the existing CSFB solution has a longer delay in establishing a voice call.

Method used

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  • CSFB call establishment method and device
  • CSFB call establishment method and device
  • CSFB call establishment method and device

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Embodiment Construction

[0097] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0098] The existing 2G / 3G core network usually consists of a PS domain and a CS domain, in which voice and other CS supplementary services are supported by the CS domain; the LTE core network does not include the CS domain, only the PS domain, so it is called an evolved packet System (Evolved Packet System, EPS). Among them, the LTE network must ...

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Abstract

Provided in an embodiment of the present invention are a circuit switched fallback (CSFB) call establishment method and device. In the method, a base station receives a packet switching non-access stratum (PS NAS) message sent by a user equipment; wherein, the user equipment is a user equipment falling back to the second generation (2G) / third generation (3G) network through the CSFB; further, the base station delays sending the PS NAS message to the serving GPRS support node (SGSN), thus delaying a PS RAB establishment and ensuring that the PS service process does not affect a CS call establishment; such that the duration for a call establishment is reduced to improve the voice call efficiency.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for establishing a CSFB call. Background technique [0002] Currently, the second generation (2G) and third generation (3G) networks such as Global System of Mobile communication (GSM) and Wideband Code Division Multiple Access (WCDMA) have been Basically achieved full coverage. Due to the preciousness of spectrum resources and the user's demand for high-speed data services, etc., the Long Term Evolution (LTE) network technology has also been developed rapidly. The LTE network has covered some urban areas and traffic hotspots. Therefore, the current The LTE network and the 2G or 3G network coexist in the communication network, wherein the LTE network is also called a fourth generation (FourthGeneration, 4G) network. However, since the LTE network is in the initial stage of construction, the LTE network is not perfect enough, so that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W76/10
CPCH04W76/10
Inventor 崇卫微吴晓波舒林
Owner 王素英
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