WO2015184865A1 - Procédé et système pour reconnaître un service de repli à commutation de circuits - Google Patents

Procédé et système pour reconnaître un service de repli à commutation de circuits Download PDF

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Publication number
WO2015184865A1
WO2015184865A1 PCT/CN2015/073137 CN2015073137W WO2015184865A1 WO 2015184865 A1 WO2015184865 A1 WO 2015184865A1 CN 2015073137 W CN2015073137 W CN 2015073137W WO 2015184865 A1 WO2015184865 A1 WO 2015184865A1
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WO
WIPO (PCT)
Prior art keywords
message
access stratum
service
network
user terminal
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Application number
PCT/CN2015/073137
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English (en)
Chinese (zh)
Inventor
王军涛
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中兴通讯股份有限公司
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Publication of WO2015184865A1 publication Critical patent/WO2015184865A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and system for identifying a circuit domain fallback service.
  • CSFB Circuit Switched Fallback
  • CS Circuit Switch
  • CSFB is used to solve the dual mode of LTE and GERAN (GSM EDGE Radio Access Network)/UTRAN (UMTS Terrestrial Radio Access Network) access capabilities. Or the problem that the multimode terminal cannot receive/transmit the circuit domain service signal when using LTE access.
  • the CSFB enables the terminal to initiate CS domain services such as voice services under LTE access.
  • CSFB services are generally based on service requirements to 2G/3G networks, not for coverage reasons. Therefore, CSFB services should return to LTE networks as much as possible after completing services in 2G/3G networks, allowing users to enjoy higher-speed network services. Therefore, the RAN (Radio Access Network) side of the 2G/3G network needs to effectively identify the CSFB service.
  • RAN Radio Access Network
  • the CSFB service has two modes from LTE to UMTS (Universal Mobile Telecommunications System)/GSM (Global System for Mobile Communication), one is CSFB switching mode, and the other is CSFB redirection mode.
  • LTE Universal Mobile Telecommunications System
  • GSM Global System for Mobile Communication
  • CSFB switching mode there is a standard field indicating CSFB service, and the RAN side is easy to identify.
  • the protocol before R10 is not explicitly indicated.
  • the R10 protocol informs the wireless network side CSFB service by introducing a CSFB indication cell in the RRC Connection Request message.
  • the R9 protocol proposes a method for indirectly identifying the CSFB, that is, if the service is redirected from the LTE to the 2G/3G network, the Pre-redirection info cell is not carried in the RRC Connection Request message.
  • LTE was introduced from the R8 protocol, and how the R8 terminal effectively identifies the CSFB service is not clearly defined in the protocol.
  • the R9 protocol can determine whether the redirection is from LTE, it cannot accurately determine whether it is a CSFB service. Therefore, for the R8/R9 terminal, the wireless access network side cannot effectively identify the CSFB service problem, and the current protocol has no good solution.
  • the technical problem to be solved by the present invention is to provide a method and system for identifying a circuit domain fallback service, which enables the wireless access network side to accurately identify the circuit domain fallback service, thereby improving the user experience of the circuit domain fallback service.
  • the embodiment of the present invention provides a method for identifying a circuit domain fallback service, which is applied to a radio access network element, and the method includes:
  • the method further comprises the following features:
  • the non-access stratum message includes a non-access stratum initial direct transmission message.
  • the method further comprises the following features:
  • the non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
  • the method further comprises the following features:
  • Determining that the non-access stratum message carries CSFB indication information including:
  • the method further comprises the following features:
  • the radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
  • the embodiment of the present invention further provides a system for identifying a circuit domain fallback service, which is applied to a radio access network element, and the system includes:
  • a message receiving module configured to receive a non-access stratum message sent by the user terminal after the user terminal is notified that the user terminal is redirected to the radio access network;
  • the message parsing and judging module is configured to parse the non-access stratum message.
  • the non-access stratum message carrying circuit domain fallback service CSFB indication information is determined, it is determined that the user terminal triggers the CSFB service.
  • the system further includes the following features:
  • the non-access stratum message includes a non-access stratum initial direct transmission message.
  • the system further includes the following features:
  • the non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
  • the system further includes the following features:
  • the message parsing and determining module determines that the non-access stratum message carries the CSFB indication information, including:
  • the system further includes the following features:
  • the radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
  • a radio access network side of a 2G/3G network is accurate by parsing a non-access stratum message (initial direct transmission message) Identifying circuit domain fallback services, thereby improving the user experience of circuit domain fallback services.
  • FIG. 1 is a schematic diagram of networking of a CSFB service in the prior art.
  • FIG. 2 is a flowchart of a method for identifying a circuit domain fallback service according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a system for identifying a circuit domain fallback service according to an embodiment of the present invention.
  • FIG. 4 is a message interaction diagram for identifying a CSFB service in an application example of the present invention.
  • an embodiment of the present invention provides a method for identifying a circuit domain fallback service, which is applied to a radio access network element, and the method includes:
  • S20 Parsing the non-access stratum message, and determining that the non-access stratum message carries the circuit domain fallback service CSFB indication information, determining that the user terminal triggers the CSFB service.
  • the method may further include the following features:
  • the radio access network comprises: a GERAN network or a UTRAN network.
  • the radio access network network element comprises: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
  • the user terminal is a dual mode or multimode terminal with LTE and GERAN/UTRAN access capabilities.
  • the non-access stratum message includes a non-access stratum initial direct transfer (Initial Direct Transfer) message.
  • a non-access stratum initial direct transfer Initial Direct Transfer
  • the non-access stratum initial direct transmission message includes: a connection management service request (CM Service Request) message and/or a location update request (Location Updating Request) message; the non-access stratum initial direct transmission message carries the user terminal
  • CM Service Request connection management service request
  • Location Updating Request Location Updating Request
  • the UE sends to the core network CN (Core Network) Non-access layer information content.
  • the non-access stratum message carrying circuit domain fallback service CSFB indication information is determined, including:
  • CSMT CS fallback mobile terminating call
  • the 3GPP protocol defines the additional update parameters as follows.
  • an embodiment of the present invention provides a system for identifying a circuit domain fallback service, which is applied to a radio access network element, and the system includes:
  • a message receiving module configured to receive a non-access stratum message sent by the user terminal after the user terminal is notified that the user terminal is redirected to the radio access network;
  • the message parsing and judging module is configured to parse the non-access stratum message.
  • the non-access stratum message carrying circuit domain fallback service CSFB indication information is determined, it is determined that the user terminal triggers the CSFB service.
  • the system can further include the following features:
  • the radio access network network element comprises: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
  • the non-access stratum message includes a non-access stratum initial direct transmission message.
  • the non-access stratum initial direct transmission message includes: a connection management service request (CM Service Request) message or a location update request (Location Updating Request) message.
  • CM Service Request connection management service request
  • Location Updating Request Location Updating Request
  • the message parsing and determining module determines the non-access stratum message carrying circuit domain fallback service CSFB indication information, including:
  • the user terminal initiates CSFB service in the first radio access network (RAN1) and redirects to the second radio access network (RAN2), where RAN1 is a 4G network, RAN2 is a 3G network, and second
  • the radio network controller RNC in the radio access network identifies whether the user terminal triggers the CSFB service, and specifically includes:
  • the UE sends a non-access stratum extended service request (NAS Extended service Request) to the eNodB of the first radio access network (RAN1);
  • NAS Extended service Request non-access stratum extended service request
  • the eNodB of the first radio access network returns an RRC Connection Release response message to the UE.
  • the UE initiates a signaling radio bearer setup request to the radio network controller RNC in the second radio access network (RAN2), and the RNC allocates corresponding resources to the UE;
  • RNC radio network controller
  • the UE initiates a non-access stratum connection management service request message (CM Service Request), and sets a value of the CSMO parameter or the CSMT parameter to 1 in an additional update parameter cell of the non-access stratum connection management service request message. ;
  • CM Service Request non-access stratum connection management service request message
  • the UE may also initiate a non-access stratum location update request message (Location Updating Request), in the additional update parameter cell of the non-access stratum location update request message, set the value of the CSMO parameter or the CSMT parameter to 1;
  • Location Updating Request a non-access stratum location update request message
  • the radio network controller sends a non-access stratum connection management service request message (or the non-access stratum connection management service request message (or the non-access stratum location update request message) to the core network CN (or The non-access stratum location update request message is parsed.
  • a non-access stratum connection management service request message or the non-access stratum connection management service request message (or the non-access stratum location update request message)
  • the non-access stratum location update request message is parsed.
  • the RAN2 network identifies the CSFB service through the NAS message, so that it is treated differently from the normal CS service, which can improve the user experience.
  • the radio access network side of the 2G/3G network accurately identifies the CSFB service by parsing the non-access stratum message (initial direct transmission message), thereby improving the circuit domain.
  • the user experience of the fallback business is not limited to:
  • a radio access network side of a 2G/3G network is accurate by parsing a non-access stratum message (initial direct transmission message) Identifying circuit domain fallback services, thereby improving the user experience of circuit domain fallback services.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour reconnaître un service de repli à commutation de circuits, qui est appliqué à un élément de réseau d'un réseau d'accès radio. Le procédé consiste : après avoir appris qu'un terminal utilisateur est redirigé vers un réseau d'accès radio présent, à recevoir un message de couche de non accès envoyé par un terminal utilisateur ; et à analyser le message de couche de non accès, lorsqu'il est déterminé que le message de couche de non accès transporte des informations d'indication de service de repli sur commutation de circuits (CSFB), à décider que le terminal utilisateur a déclenché le service CSFB. La solution technique permet à un côté réseau d'accès radio de reconnaître avec précision un service de repli à commutation de circuits, ce qui permet d'améliorer l'expérience utilisateur du service de repli à commutation de circuits. En outre, l'invention concerne également un système de reconnaissance d'un service de repli à commutation de circuits.
PCT/CN2015/073137 2014-10-30 2015-02-15 Procédé et système pour reconnaître un service de repli à commutation de circuits WO2015184865A1 (fr)

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CN201410605939.0 2014-10-30
CN201410605939.0A CN105636124A (zh) 2014-10-30 2014-10-30 一种识别电路域回落业务的方法和系统

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Cited By (1)

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TWI834287B (zh) * 2018-11-14 2024-03-01 芬蘭商諾基亞科技公司 通訊設備、通訊方法及電腦程式產品

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CN114554561B (zh) * 2022-02-12 2024-01-23 成都中科微信息技术研究院有限公司 一种ue从nr回落到lte时处理一致性的方法、存储介质及计算装置

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CN102461256A (zh) * 2009-06-16 2012-05-16 捷讯研究有限公司 用于访问无法通过网络小区使用的服务的方法
CN103081532A (zh) * 2010-06-22 2013-05-01 高通股份有限公司 用于改善无线通信系统中的电路交换回退呼叫建立延迟的系统、装置和方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI834287B (zh) * 2018-11-14 2024-03-01 芬蘭商諾基亞科技公司 通訊設備、通訊方法及電腦程式產品

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