WO2015184865A1 - Method and system for recognizing circuit switched fallback service - Google Patents

Method and system for recognizing circuit switched fallback service 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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message
access stratum
service
network
user terminal
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PCT/CN2015/073137
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French (fr)
Chinese (zh)
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***
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中兴通讯股份有限公司
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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

A method for recognizing a circuit switched fallback service, which is applied to a network element of a radio access network. The method comprises: after it is learnt that a user terminal is redirected to a present radio access network, receiving a non-access layer message sent by a user terminal; and parsing the non-access layer message, when it is determined that the non-access layer message carries circuit switched fallback (CSFB) service indication information, deciding that the user terminal has triggered the CSFB service. The technical solution enables a radio access network side to accurately recognize a circuit switched fallback service, thereby improving the user experience of the circuit switched fallback service. In addition, also provided is a system for recognizing a circuit switched fallback service.

Description

一种识别电路域回落业务的方法和***Method and system for identifying circuit domain fallback service 技术领域Technical field
本发明涉及通信技术领域，尤其涉及一种识别电路域回落业务的方法和***。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.
背景技术Background technique
随着LTE(Long Term Evolution，长期演进)的大面积商用，CSFB(Circuit Switched Fallback，电路域回落)是实现LTE网络CS(Circuit Switch，电路交换)域业务(比如，语音业务)的主要方式。With the large-scale commercialization of LTE (Long Term Evolution), CSFB (Circuit Switched Fallback) is the main way to implement CS (Circuit Switch) domain services (for example, voice services) in LTE networks.
如图1所示，CSFB用于解决具有LTE和GERAN(GSM EDGE Radio Access Network，GSM EDGE无线接入网)/UTRAN(UMTS Terrestrial Radio Access Network，UMTS陆地无线接入网)接入能力的双模或者多模终端在使用LTE接入时无法收/发电路域业务信号的问题。CSFB使得终端在LTE接入下能够发起话音业务等CS域业务。As shown in Figure 1, 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业务一般是基于业务需求到2G/3G网络的，而非基于覆盖原因，因此CSFB业务在2G/3G网络中完成业务之后应该尽可能返回到LTE网络，让用户享受更高速网络业务。因此，2G/3G网络的RAN(Radio Access Network，无线接入网络)侧需要有效识别CSFB业务。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.
CSFB业务从LTE到UMTS(Universal Mobile Telecommunications System,通用移动通信***)/GSM(Global System for Mobile Communication，全球移动通信***)有两种方式，一种是CSFB切换方式，一种是CSFB重定向方式。CSFB切换方式中有标准字段指示CSFB业务，RAN侧很容易识别，但是，对于CSFB重定向方式，R10之前的协议没有明确指示。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. . In the CSFB switching mode, there is a standard field indicating CSFB service, and the RAN side is easy to identify. However, for the CSFB redirection method, the protocol before R10 is not explicitly indicated.
R10协议通过在RRC Connection Request(RRC连接请求)消息中引入CSFB指示信元来告知无线网络侧CSFB业务。R9协议提出一种间接识别CSFB的方法，也即，如果业务是从LTE重定向到2G/3G网络，则在RRC Connection Request消息中不携带预重定向信息(Pre-redirection info)信元。 但是，LTE是从R8协议开始引入的，R8终端如何有效识别CSFB业务，协议没有明确规定。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. However, LTE was introduced from the R8 protocol, and how the R8 terminal effectively identifies the CSFB service is not clearly defined in the protocol.
因此，R9协议虽然可以判断重定向是否来自LTE，但是也不能准确判定是否为CSFB业务。因此，对于R8/R9终端，无线接入网络侧不能有效识别CSFB业务的问题，目前协议没有好的解决办法。Therefore, although 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.
发明内容Summary of the invention
本发明所要解决的技术问题是提供一种识别电路域回落业务的方法和***，能够使无线接入网络侧准确识别出电路域回落业务，从而改善电路域回落业务的用户体验。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.
为了解决上述技术问题，本发明实施例提供了一种识别电路域回落业务的方法，应用于无线接入网网元，该方法包括：In order to solve the above technical problem, 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:
在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层消息；Receiving, after the user terminal is redirected to the radio access network, receiving the non-access stratum message sent by the user terminal;
对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。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.
优选地，该方法还包括下述特点：Preferably, the method further comprises the following features:
所述非接入层消息包括非接入层初始直传消息。The non-access stratum message includes a non-access stratum initial direct transmission message.
优选地，该方法还包括下述特点：Preferably, the method further comprises the following features:
所述非接入层初始直传消息包括：连接管理服务请求消息和/或位置更新请求消息。The non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
优选地，该方法还包括下述特点：Preferably, the method further comprises the following features:
确定所述非接入层消息携带CSFB指示信息，包括：Determining that the non-access stratum message carries CSFB indication information, including:
提取连接管理服务请求消息或位置更新请求消息中的附加更新参数信元，确定所述附加更新参数信元中的电路域回落终呼CSMT参数或电路域回落起呼CSMO参数的值为1。Extracting an additional update parameter cell in the connection management service request message or the location update request message, and determining that the value of the circuit domain fallback CSMT parameter or the circuit domain fallback call CSMO parameter in the additional update parameter cell is 1.
优选地，该方法还包括下述特点： Preferably, the method further comprises the following features:
所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。The radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
为了解决上述技术问题，本发明实施例还提供了一种识别电路域回落业务的***，应用于无线接入网网元，该***包括：In order to solve the above technical problem, 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:
消息接收模块，设置为在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层消息；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;
消息解析及判断模块，设置为对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。The message parsing and judging module is configured to parse the non-access stratum message. When 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.
优选地，该***还包括下述特点：Preferably, the system further includes the following features:
所述非接入层消息包括非接入层初始直传消息。The non-access stratum message includes a non-access stratum initial direct transmission message.
优选地，该***还包括下述特点：Preferably, the system further includes the following features:
所述非接入层初始直传消息包括：连接管理服务请求消息和/或位置更新请求消息。The non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
优选地，该***还包括下述特点：Preferably, the system further includes the following features:
所述消息解析及判断模块确定所述非接入层消息携带CSFB指示信息，包括：The message parsing and determining module determines that the non-access stratum message carries the CSFB indication information, including:
提取连接管理服务请求消息或位置更新请求消息中的附加更新参数信元，确定所述附加更新参数信元中的电路域回落终呼CSMT参数或电路域回落起呼CSMO参数的值为1。Extracting an additional update parameter cell in the connection management service request message or the location update request message, and determining that the value of the circuit domain fallback CSMT parameter or the circuit domain fallback call CSMO parameter in the additional update parameter cell is 1.
优选地，该***还包括下述特点：Preferably, the system further includes the following features:
所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。The radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
与现有技术相比，本发明实施例提供的一种识别电路域回落业务的方法和***中，2G/3G网络的无线接入网络侧通过解析非接入层消息(初始直传消息)准确识别电路域回落业务，从而改善电路域回落业务的用户体验。 Compared with the prior art, in a method and system for identifying a circuit domain fallback service provided by an embodiment of the present invention, 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.
附图概述BRIEF abstract
图1为现有技术中CSFB业务组网示意图。FIG. 1 is a schematic diagram of networking of a CSFB service in the prior art.
图2为本发明实施例的一种识别电路域回落业务的方法的流程图。FIG. 2 is a flowchart of a method for identifying a circuit domain fallback service according to an embodiment of the present invention.
图3为本发明实施例的一种识别电路域回落业务的***结构示意图。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.
图4为本发明应用示例中对CSFB业务进行识别的消息交互图。FIG. 4 is a message interaction diagram for identifying a CSFB service in an application example of the present invention.
本发明的较佳实施方式Preferred embodiment of the invention
为使本发明的目的、技术方案和优点更加清楚明白，下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
如图2所示，本发明实施例提供了一种识别电路域回落业务的方法，应用于无线接入网网元，该方法包括：As shown in FIG. 2, 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:
S10，在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层NAS(Non-access stratum)消息；S10: After the user terminal is notified that the user terminal is redirected to the radio access network, receiving a non-access stratum NAS (Non-access stratum) message sent by the user terminal;
S20，对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。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.
该方法可以进一步包括下述特点：The method may further include the following features:
优选地，所述无线接入网包括：GERAN网络或UTRAN网络。Preferably, the radio access network comprises: a GERAN network or a UTRAN network.
优选地，所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。Preferably, the radio access network network element comprises: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
优选地，所述用户终端为具有LTE和GERAN/UTRAN接入能力的双模或者多模终端。Preferably, the user terminal is a dual mode or multimode terminal with LTE and GERAN/UTRAN access capabilities.
优选地，所述非接入层消息包括非接入层初始直传(Initial Direct Transfer)消息。Preferably, the non-access stratum message includes a non-access stratum initial direct transfer (Initial Direct Transfer) message.
优选地，所述非接入层初始直传消息包括：连接管理服务请求(CM Service Request)消息和/或位置更新请求(Location Updating Request)消息；非接入层初始直传消息中携带用户终端UE发送到核心网CN(Core Network) 的非接入层信息内容。Preferably, 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 The UE sends to the core network CN (Core Network) Non-access layer information content.
优选地，确定所述非接入层消息携带电路域回落业务CSFB指示信息，包括：Preferably, the non-access stratum message carrying circuit domain fallback service CSFB indication information is determined, including:
提取连接管理服务请求消息或位置更新请求消息中的附加更新参数(Additional Update Parameters)信元，确定所述附加更新参数信元中的电路域回落终呼CSMT(CS fallback mobile terminating call)参数或电路域回落起呼CSMO(CS fallback mobile originating call)参数的值为1。Extracting an additional update parameter (Additional Update Parameters) cell in the connection management service request message or the location update request message, and determining a CS fallback mobile terminating call (CSMT) parameter or circuit in the additional update parameter cell The value of the CS fallback mobile originating call (CSMO) parameter is 1.
如下表1所示，3GPP协议对附加更新参数进行了如下的定义。As shown in Table 1 below, the 3GPP protocol defines the additional update parameters as follows.
Figure PCTCN2015073137-appb-000001
Figure PCTCN2015073137-appb-000001
Figure PCTCN2015073137-appb-000002
Figure PCTCN2015073137-appb-000002
表1Table 1
如图3所示，本发明实施例提供了一种识别电路域回落业务的***，应用于无线接入网网元，该***包括：As shown in FIG. 3, 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:
消息接收模块，设置为在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层消息；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;
消息解析及判断模块，设置为对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。 The message parsing and judging module is configured to parse the non-access stratum message. When 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.
该***可以进一步包括下述特点：The system can further include the following features:
优选地，所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。Preferably, the radio access network network element comprises: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
优选地，所述非接入层消息包括非接入层初始直传消息。Preferably, the non-access stratum message includes a non-access stratum initial direct transmission message.
优选地，所述非接入层初始直传消息包括：连接管理服务请求(CM Service Request)消息或位置更新请求(Location Updating Request)消息。Preferably, 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.
优选地，所述消息解析及判断模块确定所述非接入层消息携带电路域回落业务CSFB指示信息，包括：Preferably, the message parsing and determining module determines the non-access stratum message carrying circuit domain fallback service CSFB indication information, including:
提取连接管理服务请求消息或位置更新请求消息中的附加更新参数信元，确定所述附加更新参数信元中的电路域回落终呼CSMT参数或电路域回落起呼CSMO参数的值为1。Extracting an additional update parameter cell in the connection management service request message or the location update request message, and determining that the value of the circuit domain fallback CSMT parameter or the circuit domain fallback call CSMO parameter in the additional update parameter cell is 1.
应用示例：Application example:
如图4所示，用户终端在第一无线接入网络(RAN1)中发起CSFB业务并重定向到第二无线接入网络(RAN2)中，其中，RAN1是4G网络，RAN2是3G网络，第二无线接入网络中的无线网络控制器RNC识别用户终端是否触发了CSFB业务，具体包括：As shown in FIG. 4, 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:
201，UE向第一无线接入网络(RAN1)的eNodB发送非接入层扩展业务请求(NAS Extended service Request)；201: The UE sends a non-access stratum extended service request (NAS Extended service Request) to the eNodB of the first radio access network (RAN1);
202，第一无线接入网络的eNodB向UE返回RRC连接释放(RRC Connection Release)响应消息；202. The eNodB of the first radio access network returns an RRC Connection Release response message to the UE.
203，UE向第二无线接入网络(RAN2)中的无线网络控制器RNC发起信令无线承载建立请求，RNC分配相应的资源给UE；203, 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;
204，UE发起非接入层连接管理服务请求消息(CM Service Request)，在所述非接入层连接管理服务请求消息的附加更新参数信元中，将CSMO参数或CSMT参数的值置为1；204. 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. ;
其中，UE也可以发起非接入层位置更新请求消息(Location Updating  Request)，在所述非接入层位置更新请求消息的附加更新参数信元中，将CSMO参数或CSMT参数的值置为1；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;
205，无线网络控制器在将所述非接入层连接管理服务请求消息(或非接入层位置更新请求消息)转发给核心网CN的同时，对非接入层连接管理服务请求消息(或非接入层位置更新请求消息)进行解析，当获知附加更新参数信元中的CSMO参数或CSMT参数的值为1时，判定UE发起的是CSFB业务。205. 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. When it is known that the value of the CSMO parameter or the CSMT parameter in the additional update parameter cell is 1, it is determined that the UE initiates the CSFB service.
其中，RAN2网络通过NAS消息识别了CSFB业务，从而和普通CS业务区别对待，可提高用户体验。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.
上述实施例提供的一种识别电路域回落业务的方法和***中，2G/3G网络的无线接入网络侧通过解析非接入层消息(初始直传消息)准确识别CSFB业务，从而改善电路域回落业务的用户体验。In the method and system for identifying the circuit domain fallback service provided by the foregoing embodiment, 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.
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现，相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本发明不限制于任何特定形式的硬件和软件的结合。One of ordinary skill in the art will appreciate that all or a portion of the steps described above can be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic or optical disk, and the like. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented by using a software function module. Formal realization. The invention is not limited to any specific form of combination of hardware and software.
需要说明的是，本发明还可有其他多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员可根据本发明作出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。It is to be understood that the invention may be susceptible to various other modifications and changes in the embodiments of the present invention without departing from the spirit and scope of the invention. Corresponding changes and modifications are intended to be included within the scope of the appended claims.
工业实用性Industrial applicability
与现有技术相比，本发明实施例提供的一种识别电路域回落业务的方法和***中，2G/3G网络的无线接入网络侧通过解析非接入层消息(初始直传消息)准确识别电路域回落业务，从而改善电路域回落业务的用户体验。 Compared with the prior art, in a method and system for identifying a circuit domain fallback service provided by an embodiment of the present invention, 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.

Claims (10)

  1. 一种识别电路域回落业务的方法，应用于无线接入网网元，该方法包括：A method for identifying a circuit domain fallback service is applied to a radio access network element, and the method includes:
    在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层消息；Receiving, after the user terminal is redirected to the radio access network, receiving the non-access stratum message sent by the user terminal;
    对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。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.
  2. 如权利要求1所述的方法，其中：The method of claim 1 wherein:
    所述非接入层消息包括非接入层初始直传消息。The non-access stratum message includes a non-access stratum initial direct transmission message.
  3. 如权利要求2所述的方法，其中：The method of claim 2 wherein:
    所述非接入层初始直传消息包括：连接管理服务请求消息和/或位置更新请求消息。The non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
  4. 如权利要求3所述的方法，其中：The method of claim 3 wherein:
    确定所述非接入层消息携带CSFB指示信息，包括：Determining that the non-access stratum message carries CSFB indication information, including:
    提取连接管理服务请求消息或位置更新请求消息中的附加更新参数信元，确定所述附加更新参数信元中的电路域回落终呼CSMT参数或电路域回落起呼CSMO参数的值为1。Extracting an additional update parameter cell in the connection management service request message or the location update request message, and determining that the value of the circuit domain fallback CSMT parameter or the circuit domain fallback call CSMO parameter in the additional update parameter cell is 1.
  5. 如权利要求1-4中任一项所述的方法，其中：The method of any of claims 1-4, wherein:
    所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。The radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
  6. 一种识别电路域回落业务的***，应用于无线接入网网元，该***包括：A system for identifying a circuit domain fallback service is applied to a radio access network element, the system comprising:
    消息接收模块，设置为在获知用户终端重定向到本无线接入网后，接收用户终端发送的非接入层消息；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;
    消息解析及判断模块，设置为对所述非接入层消息进行解析，当确定所述非接入层消息携带电路域回落业务CSFB指示信息时，判定所述用户终端触发了CSFB业务。 The message parsing and judging module is configured to parse the non-access stratum message. When 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.
  7. 如权利要求6所述的***，其中：The system of claim 6 wherein:
    所述非接入层消息包括非接入层初始直传消息。The non-access stratum message includes a non-access stratum initial direct transmission message.
  8. 如权利要求7所述的***，其中：The system of claim 7 wherein:
    所述非接入层初始直传消息包括：连接管理服务请求消息和/或位置更新请求消息。The non-access stratum initial direct transmission message includes: a connection management service request message and/or a location update request message.
  9. 如权利要求7所述的***，其中：The system of claim 7 wherein:
    所述消息解析及判断模块确定所述非接入层消息携带CSFB指示信息，包括：The message parsing and determining module determines that the non-access stratum message carries the CSFB indication information, including:
    提取连接管理服务请求消息或位置更新请求消息中的附加更新参数信元，确定所述附加更新参数信元中的电路域回落终呼CSMT参数或电路域回落起呼CSMO参数的值为1。Extracting an additional update parameter cell in the connection management service request message or the location update request message, and determining that the value of the circuit domain fallback CSMT parameter or the circuit domain fallback call CSMO parameter in the additional update parameter cell is 1.
  10. 如权利要求6-9中任一项所述的***，其中：A system according to any of claims 6-9, wherein:
    所述无线接入网网元包括：GERAN网络中的基站控制器或UTRAN网络中的无线网络控制器。 The radio access network network element includes: a base station controller in a GERAN network or a radio network controller in a UTRAN network.
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