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Method for switching over between systems

A technology of communication system and mobile switching center, which is applied in the field of handover between 3G communication system and 2G communication system of 3G mobile station, can solve the problems of 3G mobile station failure and handover, reduce call drop rate and improve call quality effect

Inactive Publication Date: 2009-04-15
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the RFC of the mobile station supported by the 3G system is 7, and the 2G system does not support the access of the mobile station whose RFC is 7, the 3G mobile station talking in the 3G system cannot switch to the 2G system, and the 2G system does not support the access of the mobile station. The 3G mobile station in the call cannot switch to the 3G system, so the 3G mobile station cannot switch between the 3G system and the 2G system

Method used

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  • Method for switching over between systems
  • Method for switching over between systems
  • Method for switching over between systems

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Embodiment Construction

[0029] In order to make it easier for those skilled in the art to understand and realize the present invention, the embodiments of the present invention are described in conjunction with the accompanying drawings.

[0030] The invention discloses a switching method between systems. When a third-generation mobile station switches from a source communication system to a target communication system, the equipment of the source communication system or the MSC (Mobile Switching Center) of the target communication system The RFC supported by the device configures the handover request message, the source communication system is the third generation communication system / second generation communication system, and the target communication system is the second generation communication system / third generation communication system; The equipment in the source communication system sends a switching request message to the equipment in the target communication system, so that the third genera...

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Abstract

The switching method includes steps: based on radio-frequency capability supported by equipment in destination system, equipment in source system or mobile switching center in destination system configures switching request message; the source comm. system is 3G comm. system / 2G comm. system, and destination comm. system is 2G comm. system / 3G comm. system; equipment in source system sends switching request message to equipment in destination system to make 3G MS switch to destination system from source system. When switching 3G MS, the invention can configure RFC of 3G MS as RFC supported by BSC or RNC in destination system; thus, 3G MS can be switched between 2G and 3G systems freely. The invention is especially applicable to initial stages of 3G network. Since coverage is not large enough, 3G MS can take full advantage of resources of 2G network to raise speech quality of 3G MS.

Description

technical field [0001] The invention relates to a network communication technology, in particular to a method for switching a 3G (third generation) mobile station between a 3G communication system and a 2G (second generation) communication system. Background technique [0002] In the current communication system, the 2G communication system and the 3G communication system coexist. The user who initiated the call may cross two communication systems during a call. In order to ensure that the user's call is not interrupted, it is necessary to switch between the 2G and 3G communication systems. [0003] Especially in the early stage of 3G communication system construction, its coverage is not wide enough, and the existing resources of 2G network should be fully utilized to provide users with business services. [0004] However, switching between 2G and 3G networks is not possible for 3G mobile stations. [0005] This is because, in 2G systems such as GSM 900 (Global System for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W92/02H04W36/14
Inventor 李世军贾永利濮立俊
Owner HUAWEI TECH CO LTD