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Method, device and system for voice fallback

A technology of voice fallback and position detection, which is applied in the field of communication, can solve problems such as connection errors and low connection rate of voice fallback, and achieve the effect of reducing wrong connections and improving the connection rate

Active Publication Date: 2020-03-31
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method, device and system for voice fallback to at least solve the problems in the related art that the connection rate of voice fallback is not high and connection errors are prone to occur during the international roaming process of terminals across networks

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  • Method, device and system for voice fallback
  • Method, device and system for voice fallback
  • Method, device and system for voice fallback

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Embodiment Construction

[0030] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0031] In this embodiment, a voice fallback method is provided, figure 1 is the flow of the voice fallback method according to the embodiment of the present invention Figure 1 ,Such as figure 1 As shown, the process includes the following steps:

[0032] Step S102, the international roaming gateway receives a route query request from the home location register HLRe, wherein the route query request is caused by a location query request initiated by the called multimode terminal in the international roaming state to the HLRe;

[0033] Step S104, the international roaming gateway inquires whether the old and new mobile switching center / visitor location register MSC / VLR of the multi-mode terminal voi...

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Abstract

Provided are a voice fallback method, device and system. The method comprises: according to a route query request, querying, by an international roaming gateway, whether a new / old mobile switching centre / visitor location register (MSC / VLR) of a voice fallback network of a multimode terminal supports a mobile terminal roaming retry (MTRR); in the case where the multimode terminal falls back to a 2G / 3G network and the MSC / VLR supports the MTRR, querying, by the international roaming gateway, whether a location update flow ends; and in the case where the international roaming gateway receives and detects that the location update flow ends, initiating a provide roaming number (PRN) request to an MSC / VLR which is newly registered. The present invention solves the problems that the call completion rate of voice fallback is low and connection errors easily occur in the cross-network international roaming process of a terminal, thereby increasing the call completion rate of voice fallback and reducing the connection errors.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a voice fallback method, device and system. Background technique [0002] Code Division Multiple Access (CDMA for short) technology is an important technical standard in the third generation mobile communication system. At present, CDMA commercial networks have been established in North America, China and some countries in Asia. [0003] Since the scale of the CDMA network in the world is much smaller than that of the Global System for Mobile Communication / Universal Mobile Telecommunications System (GSM / UMTS for short), when a CDMA user moves abroad, if there is no CDMA network coverage, so international roaming services cannot be realized. In order to meet the user's international roaming needs, CDMA network operators usually deploy an international roaming gateway (Foreign Location Register, referred to as FLR), and FLR realizes the protocol conversion between ANSI-41MAP (A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00
CPCH04W40/02
Inventor 刘利锋
Owner ZTE CORP