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System and method for implementing circuit switched fallback service of evolved packet system

A circuit switching fallback and switching system technology, which is applied in the field of circuit switching fallback services of terminals in the evolved packet switching system, can solve problems such as long call setup time, achieve the effects of shortening call setup time, speeding up setup speed, and improving user experience

Inactive Publication Date: 2011-05-04
ZTE CORP
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Problems solved by technology

[0047] The technical problem to be solved by the present invention is to propose a method and system for implementing circuit switching fallback services in an evolved packet switching system, and to solve the problem of long call setup time when the UE performs CSFB in the prior art

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  • System and method for implementing circuit switched fallback service of evolved packet system
  • System and method for implementing circuit switched fallback service of evolved packet system
  • System and method for implementing circuit switched fallback service of evolved packet system

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Embodiment Construction

[0089] The present invention solves the problem of long call setup time when UE executes CSFB in the prior art by adopting the EPS data transmission channel between UE and MSC for exchanging CS call signaling and CS switching to realize CS access.

[0090] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0091] In the present invention, when the UE resides on the EPS network and has jointly registered with the MME and the MSC, when CS services occur, the implementation method of the circuit switching fallback service includes:

[0092] A. A CS call session is established between the UE and the MSC through the EPS data transmission channel;

[0093] B. The eNodeB obtains the wireless measurement report of the UE according to the instruction of the MME, determines the target network to which the UE falls back, and sends a handover request to the MME, and the MME sends the handover request to the MSC...

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Abstract

The invention discloses a system and a method for implementing circuit switched fallback (CSFB) service of evolved packet system (EPS). The method comprises that: when user equipment (UE) resides in an EPS network and is jointly registered in a mobility management entity (MME) and a mobile switching center (MSC) and circuit switched (CS) service happens, CS call session is established between theUE and the MSC through an EPS data transmission channel; an eNodeB acquires a radio measurement report of the UE according to the indication of the MME, determines a fallback target network of the UEand sends a switching request to the MME, and the MME sends the switching request to the MSC; the MSC executes the CS process, acquires radio resource access parameters of a target network and returns switching response to the MME, and the MME sends a switching command to the UE through the eNodeB; and the UE is switched to the target network according to the radio resource access parameters in the switching command to perform subsequent CS call. The method and the system can quicken the call establishing speed, and shorten the call establishing time of a calling process and a called process.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method and a system for implementing a circuit switching fallback service of a terminal in an evolved packet switching system. Background technique [0002] Evolved Packet Switched System (EPS for short) is a mobile packet switching technology developed and developed by the 3rd Generation Partnership Project (3GPP for short), aiming to provide a higher transmission rate , a wireless packet switching network with shorter transmission delay. [0003] EPS can be further divided into Evolved Universal Mobile Telecommunication System Radio Access Network (Evolved Universal Mobile Telecommunication System Radio Access Network, referred to as E-UTRN) and Evolved Packet Switched Core Network (Evolved Packet Switched Core, referred to as EPC). EPC can also support Universal Mobile Telecommunication System Radio Access Network (UTRAN for short), GSM (Global System for Mobile ...

Claims

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Application Information

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IPC IPC(8): H04W36/14H04W76/02
Inventor 郝振武陶全军谢振华
Owner ZTE CORP
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