Method for the use of a GSM/UMTS mobile communication network by a user equipment attached to a core network of an evolved packet system (EPS) mobile communication network

An evolutionary packet system and mobile communication technology, applied in the field of GSM/UMTS mobile communication network, can solve the problems of different propagation characteristics and unreliability
CN103348731AInactive Publication Date: 2013-10-09DEUTSCHE TELEKOM AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DEUTSCHE TELEKOM AG
Publication Date
2013-10-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for use of a Global System of Mobile Communication (GSM) and Universal Mobile Telecommunication System (UMTS) (GSM / UMTS) mobile communication network by a user equipment attached to a core network of an Evolved Packet System (EPS) mobile communication network, the use of the GSM / UMTS mobile communication network being the result of a fallback operation, includes, prior to an invocation of a service that triggers the fallback operation: performing an updating operation regarding assignment of a Location Area Code (LAC) and / or a serving Mobile Switching Center (MSC) to the user equipment; and / or performing, autonomously by the user equipment, a measurement operation regarding a current General Packet Radio System (GPRS) / EDGE Radio Access Network (GERAN) or UMTS Terrestrial Radio Access Network (UTRAN) (GERAN / UTRAN) radio environment in order to identify potential CSFB target cells of the user equipment.
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Description

Background technique

[0001] The invention relates to a method of using a GSM / UMTS mobile communication network, in particular by a user equipment connected to a core network of an Evolved Packet System (EPS) mobile communication network.

[0002] The 3rd Generation Partnership Project (3GPP) has specific capabilities for Evolved Packet System (EPS) networks and devices to allow them to use legacy circuits provided by Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) networks Exchange (CS) service.

[0003] The motivation for this feature is that Circuit Switched (CS) services, such as voice and SMS services today, are not available on Evolved Packet System (EPS), since Evolved Packet System (EPS) only provides Packet Switched (PS) services fact.

[0004] Therefore, there is a need for functionality that allows an Evolved Packet System (EPS) terminal - when it is registered in the Evolved Packet System (EPS) - when there is no...

Claims

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