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Method and device in a telecommunications system

A radio, circuit-switched technology used in the field of telecommunication systems

Active Publication Date: 2013-10-09
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, system information may be set to favor LTE over WCDMA and GSM

Method used

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  • Method and device in a telecommunications system
  • Method and device in a telecommunications system
  • Method and device in a telecommunications system

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Embodiment Construction

[0035] In the following description describing some exemplary embodiments, two scenarios are analyzed: a mobile-originated Circuit Switched Fallback (CSFB) call, and a corresponding mobile-terminated CSFB call. Relating to these two exemplary scenarios, it is assumed here that based on some criteria, e.g. CS-centric users are kept in GSM and lesser CS-centric users that primarily use packet-switched (PS) data services are kept in LTE and / or WCDMA, Long Term Evolution / Wideband Code Division Multiple Access / Global System for Mobile Communications / (LTE / WCDMA / GSM) mobile terminals supporting CSFB in idle mode are distributed over the combined GSM / WCDMA / LTE network. To further simplify the description, the term mobile station will be used to refer to any device connectable to a cellular radio network, such as any user equipment or (mobile) terminal.

[0036] In a GSM / WCDMA network, this scenario means a CS voice call is either a normal mobile originated / terminated CS language call ...

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Abstract

In a method in a central node of a cellular radio network the central node is adapted to deciding if a mobile station connected to the cellular radio network via a first radio access technology controlled by the central node is to be moved to another radio access technology when a circuit switched call of the mobile station is ended. It is assumed that the cellular radio network is adapted to use a fallback to circuit switched procedure. First it is decided that a CS call for a particular mobile station has ended. Then in it is checked if the CS call was the result of a fallback to CS procedure. The central node then decides if the mobile station is to be moved to another radio access technology based at least partly on the, i.e. if the CS call was a result of a CS fallback procedure.

Description

technical field [0001] The present disclosure relates to methods and devices in a telecommunication system, in particular to methods and devices for providing preferred distribution of idle user equipment (UE) among different radio access technologies (RATs), and also to providing RATs with information to obtain preferred distribution methods and apparatus. Background technique [0002] Mobile Circuit Switched (CS) services based on Global System for Mobile Communications (GSM) and Wideband Code Division Multiple Access (WCDMA) radio access allow telecommunication services to be obtained with a single subscription in almost all countries around the world. Moreover, the number of CS subscribers is still growing rapidly today, driven by the deployment of mobile CS services in densely populated countries such as India and China. Furthermore, the typical Mobile Switching Center (MSC) architecture is changed to a so-called softswitch solution, which allows the use of packet tran...

Claims

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Application Information

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IPC IPC(8): H04W36/00
CPCH04W36/0022H04W36/38H04W88/10
Inventor P·古斯塔夫森P·施利瓦-伯特林T·约翰森M·奥尔森
Owner TELEFON AB LM ERICSSON (PUBL)
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