WO2009121282A1 - Procédé et station de base destinés à l’établissement de communications - Google Patents

Procédé et station de base destinés à l’établissement de communications Download PDF

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Publication number
WO2009121282A1
WO2009121282A1 PCT/CN2009/071031 CN2009071031W WO2009121282A1 WO 2009121282 A1 WO2009121282 A1 WO 2009121282A1 CN 2009071031 W CN2009071031 W CN 2009071031W WO 2009121282 A1 WO2009121282 A1 WO 2009121282A1
Authority
WO
WIPO (PCT)
Prior art keywords
target network
network
transmission mode
domain
mobile terminal
Prior art date
Application number
PCT/CN2009/071031
Other languages
English (en)
Chinese (zh)
Inventor
赵旸
王济勇
余勇军
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2009121282A1 publication Critical patent/WO2009121282A1/fr

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a base station for call setup. Background technique
  • Second-generation mobile communication technology 2nd Generation, 2G or third-generation mobile communication technology (3rd generation, 3G) network
  • GSM Global System for Mobile Communication
  • WCDMA Wideband Code Division Multiple Access
  • WCDMA Code Division Multiple Access
  • SAE System Architecture Evolution
  • HSPA High Speed Packet Access
  • HSPA+ High Speed Packet Access Evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • VoIP Voice over Internet Protocol
  • IMS IP Multimedia Subsystem
  • voice calls can only be transmitted on their PS domain bearers. Voice over calls are controlled over IP-based networks. In a 2G or 3G network, voice calls are generally carried on the CS domain.
  • the user who initiates the call can span the network of two different bearer mechanisms during a call, because the mobile communication service bears different mechanisms, for example, when the mobile terminal (User Equipment, UE) moves out of the base station of the pure PS domain network.
  • the range when entering the coverage area of a base station of a 2G or 3G network, may cause a discontinuity of a voice call, thereby affecting the continuity of the user's voice call.
  • the CS fallback mechanism can be used for processing. For example, when the mobile phone initiates a CS call or responds to the CS paging on the LTE network, Switch or reselect to GSM/EDGE radio access network
  • GSM I EDGE Radio Access Network GERAN
  • UTRAN global Terrestrial Radio Access Network
  • the GERAN or UTRAN network performs the circuit domain call setup procedure.
  • the inventor found in the process of implementing the present invention that, in the above solution, if the target network supports
  • the CS service is performed at the same time, that is, after the PS handover, the CS service cannot be established before the PS service is released, resulting in the delay of the CS service establishment.
  • the embodiment of the invention provides a method for establishing a call and a base station to ensure fallback to the CS domain.
  • an embodiment of the present invention discloses a method for establishing a call, including:
  • the pure packet switched domain source network acquires dual transmission mode capability information of the target network that carries the session type service by the circuit domain;
  • the source network After the source network receives the circuit domain service request, if the target network supports the packet switched domain handover and the dual transmission mode, performing a packet switched domain handover, and performing circuit domain call on the target network. Call the establishment process.
  • an embodiment of the present invention further discloses a call setup method, including: a pure packet switched domain source network acquires dual transmission mode capability information of a target network that carries a session type service by a circuit domain;
  • the mobile terminal After the source network receives the circuit domain service request, if the target network supports the packet switched domain handover but does not support the dual transmission mode, the mobile terminal accesses the mobile terminal to the target network cell or by the network-assisted cell change procedure. The mobile terminal autonomously reselects to the target network cell, and performs a circuit domain call setup procedure on the target network.
  • the embodiment of the present invention further discloses a pure packet switched domain network base station, including: an information acquiring unit, configured to acquire dual transmission mode capability information of a target network that carries a session type service by a circuit domain;
  • a receiving unit configured to receive a circuit domain service request
  • an execution unit configured to: after the receiving unit receives the circuit domain service request, switch or reselect to the target network cell according to the dual transmission mode capability information of the target network acquired by the information acquiring unit.
  • the technical solution of the embodiment of the present invention can be seen that, by considering the DTM capability of the target access network, the CS service access delay can be reduced and the continuity of the PS domain service can be maintained during the implementation of the CS fallback mechanism. Effective execution of the CS fallback mechanism.
  • FIG. 1 is a schematic flowchart 1 of an embodiment of a method according to the present invention.
  • FIG. 2 is a schematic flowchart 2 of an embodiment of a method according to the present invention.
  • FIG. 3 is a schematic flowchart 3 of an embodiment of a method according to the present invention.
  • FIG. 4 is a schematic flow chart 4 of an embodiment of a method according to the present invention.
  • FIG. 5 is a schematic flowchart 5 of an embodiment of a method according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a base station according to the present invention.
  • the mobile phone When the mobile phone is in a pure PS domain network, for example, an LTE network that does not deploy IMS, when a CS call is initiated or a CS page is responded to, the CS fallback mechanism is adopted, that is, the CS domain is first switched or reselected to the CS domain to carry the session type service.
  • Network for example, GERAN or UTRAN network. The following is a description of the technical solution of the call setup method embodiment of the present invention, as shown in FIG. 1 by taking the LTE network reselection to the GERAN network as an example.
  • the source access network for example, the Evolved NodeB (eNodeB) obtains the DTM capability information of the target network in one of four ways:
  • RIM Get DTM capability information for the target network.
  • the target access network that is, the GERAN access network transparently transmits the system information including the DTM capability information to the source access network through the core network, for example, the system information including the DTM capability information may be carried in the access In the system message delivered by the network.
  • the RIM process can always be used as a necessary process.
  • the DTM capability information may be requested from the target access network when needed, and the target access network feeds back the DTM capability information to the eNodeB after receiving the request.
  • the target access network actively provides the eNodeB with its DTM capability information.
  • the foregoing four methods for obtaining the DTM capability information of the target network are merely exemplary.
  • the present invention does not limit the specific manner for obtaining the DTM capability information of the target network, and any manner that can achieve the purpose of acquiring the DTM capability information is in the present invention. Within the scope of protection.
  • the target network supports the packet switched domain handover and the dual transmission mode, performing a packet switched domain handover, and performing a circuit domain call setup procedure on the target network.
  • the evolved base station receives a circuit domain call request from the mobile terminal, that is, the terminal initiates
  • the evolved base station receives a CS call request from the mobile terminal.
  • the evolved base station may request to acquire a measurement report to determine the GERAN target cell for the packet switched domain handover, and this step is optional.
  • the evolved base station performs PS handover, for example, by sending a Relocation Required message (Relocation required) to initiate the
  • PS handover of the GERAN target cell For the specific PS handover procedure, refer to the relevant 3GPP specifications, which will not be described in detail here.
  • the mobile switching center corresponding to the GERAN network The MSC sends a circuit domain paging request to the mobility management entity MME of the LTE network, and the MME forwards the circuit domain paging request to the evolved base station of the LTE network.
  • the evolved base station may request to acquire a measurement report according to a circuit domain paging request from the core network, thereby determining a PS handover GERAN target cell, and the step is optional.
  • the evolved base station performs PS handover, for example, a PS handover to the GERAN target cell may be initiated by transmitting a Relocation Required message (Relocation required).
  • PS handover procedure refer to the relevant 3GPP specifications, which will not be described in detail here.
  • the mobile terminal establishes a CS called voice call in the target GERAN cell.
  • the target network supports the PS handover but does not support the DTM.
  • the mobile terminal accesses the mobile terminal to the target network cell or is reselected by the mobile terminal by the network-assisted cell change procedure.
  • the target network cell performs a circuit domain call setup process on the target network.
  • the evolved base station receives a circuit domain call request from the mobile terminal, that is, the terminal initiates
  • the evolved base station receives a circuit domain call request from the mobile terminal.
  • the evolved base station may request to obtain a measurement report to determine the network-assisted cell reselection of the GERAN target cell. This step is optional.
  • the target network supports PS handover but does not support DTM. Or, when the target network does not support PS handover, the evolved base station sends a cell change command to the mobile terminal, and the secondary mobile terminal reselects to the target GERAN cell. During the network-assisted cell change process, information required to accelerate the mobile terminal to access the target GERAN cell circuit domain may be transmitted to reduce the delay of circuit domain call setup. If the mobile terminal has a PS domain service, the circuit domain service is first initiated in the target network.
  • the mobile switching center MSC corresponding to the GERAN network sends a circuit domain paging request to the mobility management entity MME of the LTE network, and the MME forwards the circuit domain paging request to the evolved base station of the LTE network.
  • the evolved base station may request to acquire a measurement report according to a circuit domain paging request from the core network, thereby determining a network-assisted cell reselected GERAN target cell, and the step is optional.
  • the target network supports PS handover but does not support DTM, or when the target network does not support PS handover, the evolved base station sends a cell change command to the mobile terminal, and the secondary mobile terminal reselects to the target.
  • the circuit domain service is first initiated in the target network.
  • the mobile terminal establishes a CS called voice call in the target GERAN cell.
  • the target network supports the PS handover but does not support the DTM, or the target network does not support the PS handover, and may also be reselected by the mobile terminal to the target network cell, in the target network. Perform the circuit domain call setup process.
  • the embodiment of the invention further provides a pure packet switched domain network base station, as shown in FIG. 6, which includes:
  • the information acquiring unit 61 is configured to acquire dual transmission mode capability information of the target network that carries the session type service by the circuit domain;
  • the receiving unit 62 is configured to receive a circuit domain service request.
  • the executing unit 63 is configured to switch or reselect to the target network cell according to the dual transmission mode capability information of the target network acquired by the information acquiring unit, after the receiving unit receives the circuit domain service request.
  • the base station further includes: a measurement reporting unit 64, configured to acquire a measurement report, to determine a target cell for network-assisted cell reselection.
  • a measurement reporting unit 64 configured to acquire a measurement report, to determine a target cell for network-assisted cell reselection.
  • the execution unit may comprise one of the following modules or any combination thereof:
  • a first execution module 631 configured to perform a packet switched domain switch when the target network supports a packet switched domain handover and a dual transmission mode
  • a second executing module 632 configured to: when the target network does not support packet switched domain switching or support packet switched domain switching but does not support dual transmission mode, accessing the mobile terminal to the target network by using a network-assisted cell change procedure Community
  • a third execution module 633 configured to: when the target network does not support packet switched domain switching or branching When the packet switched domain handover is performed but the dual transmission mode is not supported, the mobile terminal is triggered to autonomously reselect to the target network cell.
  • a pure PS domain network mentioned in the embodiments of the present invention including but not limited to SAE/LTE,
  • the HSPA, HSPA+, or WiMAX network the network that carries the session type service by the CS domain mentioned in the embodiment of the present invention includes but is not limited to a 2G or 3G network.
  • the CS fallback mechanism can be correctly determined. For example, if the target network supports the PS handover but does not support the DTM, the NACC process is adopted. The mobile terminal accesses the target network cell or is autonomously reselected by the mobile terminal to the target network cell, so as to avoid releasing the PS service and then establishing the CS service, because the DTM is not supported, The CS service access delay is reduced. If the target network supports the PS handover and the DTM, the PS handover is performed to perform the CS call setup process, thereby taking into account the continuity of the PS domain service; and ensuring the effective execution of the CS fallback mechanism.

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

Abstract

La présente invention concerne un procédé et une station de base destinés à l'établissement de communications. Au moyen de l’obtention des informations de capacité sur le mode de transfert double d’un réseau cible dans lequel le type de session est acheminé par le domaine de circuit, lorsqu’un réseau source du domaine à commutation de paquets pur reçoit une demande de service de domaine de circuit, si le réseau cible accepte le transfert du domaine à commutation de paquets et un mode de transfert double, le transfert du domaine à commutation de paquets sera réalisé, et la procédure d’établissement de communications du domaine de circuit sera mise en œuvre dans le réseau cible ; si le réseau cible accepte le transfert du domaine à commutation de paquets, mais n’accepte pas un mode de transfert double, le terminal mobile accèdera à la cellule du réseau cible par le biais de la procédure de changement de cellule assisté par le réseau ou ledit terminal mobile sélectionnera de nouveau indépendamment la cellule du réseau cible, et la procédure d’établissement de communications du domaine de circuit sera mise en œuvre dans le réseau cible, réduisant ainsi le temps d’accès au service CS.
PCT/CN2009/071031 2008-04-03 2009-03-26 Procédé et station de base destinés à l’établissement de communications WO2009121282A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810066604.0 2008-04-03
CN2008100666040A CN101553039B (zh) 2008-04-03 2008-04-03 呼叫建立的方法和基站

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WO2009121282A1 true WO2009121282A1 (fr) 2009-10-08

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WO (1) WO2009121282A1 (fr)

Cited By (1)

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GB2472826A (en) * 2009-08-20 2011-02-23 Samsung Electronics Co Ltd Selection of method for performing a packet-switched to circuit-switched session transfer

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JP4841675B2 (ja) * 2010-02-09 2011-12-21 株式会社エヌ・ティ・ティ・ドコモ 移動通信システム、ネットワーク装置及び移動通信方法
US8565187B2 (en) * 2010-03-10 2013-10-22 Via Telecom, Inc. Fast reselection to other radio access technology after circuit switched fallback
CN102209370B (zh) * 2010-03-31 2015-09-02 重庆重邮信科通信技术有限公司 Lte多模终端在lte接入模式下发起电路域话音呼叫的方法
TWI513254B (zh) * 2011-03-16 2015-12-11 Chiun Mai Comm Systems Inc 應用於手機中的通訊方法
CN102833807B (zh) * 2011-06-14 2015-05-27 华为技术有限公司 分组数据业务悬挂方法和装置
US20140177591A1 (en) * 2012-12-21 2014-06-26 Qualcomm Incorporated Systems and methods for reduced latency circuit switched fallback

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CN1421084A (zh) * 2000-03-31 2003-05-28 摩托罗拉公司 使移动站能够接收电路交换寻呼的方法
WO2007007150A1 (fr) * 2005-07-07 2007-01-18 Telefonaktiebolaget Lm Ericsson (Publ) Procede et controleurs de station de base pour transfert de session de donnees et de donnees vocales simultanees
CN101035364A (zh) * 2007-03-30 2007-09-12 上海华为技术有限公司 从3g小区到2g小区的切换方法及网络侧设备
KR20070098389A (ko) * 2006-03-31 2007-10-05 엘지전자 주식회사 이동통신 시스템에서 핸드오버 수행 방법 및 그 지원 방법

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CN1421084A (zh) * 2000-03-31 2003-05-28 摩托罗拉公司 使移动站能够接收电路交换寻呼的方法
WO2007007150A1 (fr) * 2005-07-07 2007-01-18 Telefonaktiebolaget Lm Ericsson (Publ) Procede et controleurs de station de base pour transfert de session de donnees et de donnees vocales simultanees
KR20070098389A (ko) * 2006-03-31 2007-10-05 엘지전자 주식회사 이동통신 시스템에서 핸드오버 수행 방법 및 그 지원 방법
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2472826A (en) * 2009-08-20 2011-02-23 Samsung Electronics Co Ltd Selection of method for performing a packet-switched to circuit-switched session transfer
GB2472826B (en) * 2009-08-20 2012-06-27 Samsung Electronics Co Ltd Selection of method for performing a packet switched to circuit switched session transfer and a network element therefor

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CN101553039A (zh) 2009-10-07
CN101553039B (zh) 2010-12-08

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