WO2012149866A1 - Procédé et système pour transfert de domaine de continuité d'appel vocal radio unique - Google Patents

Procédé et système pour transfert de domaine de continuité d'appel vocal radio unique Download PDF

Info

Publication number
WO2012149866A1
WO2012149866A1 PCT/CN2012/074315 CN2012074315W WO2012149866A1 WO 2012149866 A1 WO2012149866 A1 WO 2012149866A1 CN 2012074315 W CN2012074315 W CN 2012074315W WO 2012149866 A1 WO2012149866 A1 WO 2012149866A1
Authority
WO
WIPO (PCT)
Prior art keywords
domain
request
peer
srvcc
media resource
Prior art date
Application number
PCT/CN2012/074315
Other languages
English (en)
Chinese (zh)
Inventor
高扬
周蓝粢
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012149866A1 publication Critical patent/WO2012149866A1/fr

Links

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
    • 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]
    • H04W36/00226—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] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]

Definitions

  • the present invention relates to a domain-based handover technology, and in particular, to a single wireless voice call continuity (SRVCC, Single Radio Voice Call Continuity) domain handover method and system .
  • SSVCC Single Radio Voice Call Continuity
  • the Internet Multimedia Subsystem is the future development direction of multimedia communication and the most important component of the next generation network. It is a subsystem supporting IP multimedia services proposed by the 3GPP (3GPP, Third Generation Partnership Project). Its distinctive feature is the use of the Session Initial Protocol (SIP) system. Communication is independent of access mode. And with a variety of multimedia service control functions and separation of bearer capabilities, call and session separation, separation of applications and services, separation of services and networks, and the convergence of mobile networks and Internet services.
  • SIP Session Initial Protocol
  • Single Radio Voice Call Continuity implements voice switching between the IMS and the Circuit Switching (CS) in the Single Radio environment.
  • the SRVCC is mainly for the UE of the Single Radio, that is, the UE can only use the 2G/3G Radio and the Long Term Evolution (LTE) network of the Radio at the same time.
  • LTE Long Term Evolution
  • the demand of the Single Radio is proposed by the terminal manufacturer. The purpose is to reuse the RF and related circuits of 2G/3G and LTE networks.
  • SRVCC has a unique nature because of Single Radio: The switching between Radio is very fast, but before the handover, the CS-related network side channel needs to be established, and the remote end is updated.
  • SRVCC switching in the process design, need to first CS channel creation and remote update (Remote Update), then switch from the packet switched domain to the circuit switched domain (PS to CS Handover); In the case of roaming, Remote Update Time is second.
  • PS Packet Switching
  • the user's packet switching (PS, Packet Switching) domain-related Radio such as LTE Radio
  • PS-related Radio has completely attenuated before the PS to CS Handover command is sent, which will result in the inability to complete the handover.
  • the second-level Remote Update will also cause a certain Media Clip, resulting in a poor user experience (if more than 200ms, the user will be aware).
  • 3GPP proposes to enhance the concept of SRVCC to solve the above-mentioned scheme of reducing switching time, specifically:
  • the bow I enters the access side media anchor point, reducing the signaling time of the Remote Update signaling.
  • the switch enters the new access side anchor point access transfer control function (ATCF, Access Transfer Control Function) and the access transfer gateway (ATGW, Access Transfer Gateway); the call is anchored to the ATCF, reducing the switching distance and reducing the switching time.
  • ATCF Access Transfer Control Function
  • ATGW Access Transfer Gateway
  • FIG. 1 is a schematic structural diagram of a related network element involved in 3GPP enhanced SRVCC domain handover.
  • an access-side anchor point new function network element ATCF is introduced.
  • ATGW the following briefly introduces the basic call and domain switching path processing before I switch to the ATCF and ATGW.
  • the UE initiates or receives a call in the PS domain, and performs information interaction with a proxy call session control function (P-CSCF, Proxy-Call Session Control Function) through the Gm interface;
  • P-CSCF Proxy-Call Session Control Function
  • the P-CSCF exchanges information with the ATCF through the Mw/Mx interface, and the ATCF controls the ATGW; the UE media is linked to the ATCF and the ATGW;
  • the UE is anchored to the ATCF and the ATGW;
  • the ATCF exchanges information with the Serving-Call Session Control Function (S-CSCF) through the Mw/Mx interface;
  • S-CSCF Serving-Call Session Control Function
  • the S-CSCF triggers the service continuous "1" application server (SCC AS, Service Centralization and Continuity Application) through the initial filter rule (IFC, Initial Filter Criteria). Server ) 0
  • the domain switching process is as follows:
  • the UE reports the radio access signal to the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and the E-UTRAN determines the triggering of the SRVCC handover to the CS domain; the mobile switching center (MSC, Mobile)
  • the Switching Center carries a session transfer number (STN-SR, Session Transfer Number Single-Radio) to initiate a session switching operation;
  • the MSC initiates an initial INVITE session switching request to the ATCF, and carries a Request-URI as a STN-SR, a Session Description Protocol (SDP) supported by a Media Gateway (MGW, Media Gateway);
  • SDP Session Description Protocol
  • MGW Media Gateway
  • the ATCF associates the local end with the remote end to perform media resource negotiation and completes the domain handover process. After the domain handover succeeds, the P-CSCF releases the original UE's call in the PS domain.
  • Enhancing SRVCC technology has the following problems:
  • a new ATCF/ATGW network element needs to be introduced, and if the call is to be handed over, it needs to be anchored at the ATGW, and has a capacity requirement for the ATGW.
  • a new protocol interface between the P-CSCF and the ATCF needs to be introduced, and the existing network is changed. Larger. Summary of the invention
  • the main purpose of the present invention is to provide a method and system for switching a single wireless voice call continuity domain, which can enhance SRVCC domain switching by performing function expansion on existing network elements, since it is not necessary to The corresponding interface is changed, so the changes to the existing protocol are small, and the existing network investment is protected.
  • a method for switching a single wireless voice call continuity domain the function of the ATCF is implemented by the AS, and the function of the ATGW is implemented by the MRFP; the method further includes:
  • the UE After the UE is anchored to the AS and the MRFP to implement the SRVCC service, the UE sends the domain cut to the AS. Change request
  • the AS performs media resource negotiation of the UE and its peer UE, and completes domain switching.
  • the method further includes:
  • the AS allocates an SRVCC handover number to the UE during UE registration of the SRVCC.
  • the AS forwards the media resource update request to the peer UE by using the proxy call session control function P-CSCF when performing the media resource negotiation of the UE and the peer UE;
  • the AS directly sends an update request for the media resource of the peer UE when performing media resource negotiation between the UE and the peer UE.
  • the method further includes:
  • the P-CSCF releases the call of the UE in the packet switched PS domain;
  • the AS When the AS directly sends an update request for the media resource of the opposite UE, the AS releases the call of the UE in the packet switched PS domain.
  • the AS is connected to the called session control function CSCF through an IMS service control ISC interface; the AS controls the MRFP.
  • the UE is anchored to the AS and the MRFP, and the media of the UE of the SRVCC is linked to the AS and the MRFP.
  • the method further includes:
  • the domain handover request is initiated by a mobile switching center MSC in the circuit switched CS domain in which the UE is located.
  • the method further includes:
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the E-UTRAN determines to trigger an SRVCC handover according to the radio access signal of the UE.
  • CS domain Evolved Universal Terrestrial Radio Access Network
  • An initial INVITE session switching request is initiated by the MSC to the AS.
  • the initial INVITE session switching request carries an SDP supported by a Request-URI and a media gateway, where the Request-URI is an STN-SR.
  • the function of the ATCF is specifically implemented by the service continuity control application server SCC-AS of the visited domain.
  • a single wireless voice call continuity domain switching system which implements the ATCF function by using the AS, and implements the ATGW function by using the MRFP;
  • the UE is configured to send a domain handover request to the AS after the SRVCC service is implemented on the AS and the MRFP;
  • the AS after receiving the domain handover request of the UE, performs media resource negotiation of the UE and its opposite UE to implement domain handover.
  • the AS is further configured to: when performing the media resource negotiation of the UE and the peer UE, or the AS is further configured to directly send the pair when performing media resource negotiation of the UE and the peer UE thereof An update request of the peer UE media resource.
  • the P-CSCF releases the call of the UE in the packet switched PS domain;
  • the AS When the AS directly sends an update request to the peer UE media resource, the AS releases the call of the UE in the PS domain.
  • the domain handover request is initiated by an MSC of a circuit switched CS domain in which the UE is located.
  • the UE is further configured to report a radio access signal to the E-UTRAN;
  • the E-UTRAN is further configured to determine that the SRVCC is triggered according to the radio access signal of the UE. Switch to the cs domain;
  • An initial INVITE session switching request is initiated by the MSC to the AS.
  • the initial INVITE session switching request carries an SDP supported by a Request-URI and a media gateway, where the Request-URI is an STN-SR.
  • the function of the ATCF is implemented by using an application server (AS, Application Server) in the existing system, and the function of the ATGW is implemented by a Multimedia Resource Function Processor (MRFP); thus, since the AS and the MRFP are both For the existing network elements in the current system, it is not necessary to change the interfaces involved in the introduced network elements after the introduction of the ATCF and ATGW functions, and the current protocol changes must be small, so that not only the investment of the existing network system is performed. Protection, but also facilitates the maintenance of the network system, saving the cost of implementing SRVCC domain handover implementation.
  • AS Application Server
  • MRFP Multimedia Resource Function Processor
  • FIG. 1 is a schematic structural diagram of related network elements involved in 3GPP enhanced SRVCC domain handover
  • FIG. 2 is a schematic structural diagram of related network elements involved in enhanced SRVCC domain handover according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another related network element involved in enhancing SRVCC domain handover according to an embodiment of the present invention
  • Embodiment 4 is a flow chart of Embodiment 1 of a method for switching a single wireless voice call continuity domain according to the present invention
  • FIG. 5 is a flow chart of Embodiment 2 of a method for switching a single wireless voice call continuity domain according to the present invention. detailed description
  • FIG. 2 is a schematic structural diagram of related network elements involved in enhancing SRVCC domain handover according to an embodiment of the present invention.
  • the present invention uses the network element AS and the MRFP in an existing network system as extension access control respectively.
  • Function ATCF, Access Transfer Control Function
  • ATGW Access Transfer Gateway
  • AT-AS AS used as ATCF
  • MRFP Multimedia Resource Function Controller
  • AT-AS is responsible for anchoring and switching, and controlling MRFP.
  • the UE initiates or receives a call in the PS domain, and performs information interaction with the P-CSCF through the Gm interface;
  • the P-CSCF exchanges information with the AT-AS through the ISC interface, and the AT-AS controls the MRFP; the UE media is linked to the AT-AS and the MRFP;
  • the UE is anchored to the AT-AS and the MRFP;
  • the AT-AS sends the related message to the P-CSCF through the ISC interface, or receives the related message sent by the P-CSCF through the ISC interface;
  • the UE reports the radio access signal to the E-UTRAN, and the E-UTRAN determines to trigger the SRVCC handover to the CS domain according to the radio access signal; the MSC carries the STN-SR to initiate a session switching operation;
  • the MSC initiates an initial INVITE session switching request to the AT-AS, and carries the Request-Uniform Resource Identifier (Request-URI) and the SDP supported by the MGW.
  • Request-URI is the STN-SR.
  • the AT-AS associates the local end with the remote end to negotiate media resources and complete the domain switching process.
  • FIG. 3 is a schematic structural diagram of related network elements involved in enhancing SRVCC domain handover according to an embodiment of the present invention.
  • the present invention extends the functions of the network element AS and the MRFP in the existing network system as functions of the ATCF, respectively.
  • the ATGW function is used to implement SRVCC domain switching.
  • AT-AS used as ATCF
  • MRFP are deployed on the access side.
  • MRFC can exist between AT-AS and MRFP.
  • AT-AS is responsible for anchoring and switching, and controls.
  • MRFP Compared with the structure shown in FIG. 2, the structure shown in FIG.
  • the AT-AS is not like the FIG.
  • the P-CSCF interacts with the PS domain and the home network, but directly with the PS domain and the home network.
  • the UE initiates or receives a call in the PS domain, and interacts with the P-CSCF through the Gm interface; the P-CSCF interacts with the AT-AS through the ISC interface, and the AT-AS controls the MRFP;
  • UE media is attached to AT-AS and MRFP;
  • the UE is anchored to the AT-AS and the MRFP;
  • the AT-AS sends the related message directly to the P-CSCF or the I/S-CSCF, or directly receives the related message through the P-CSCF or the I/S-CSCF;
  • the UE reports the radio access signal to the E-UTRAN, and the E-UTRAN determines to trigger the SRVCC handover to the CS domain according to the radio access signal; the MSC carries the STN-SR to initiate a session switching operation;
  • the MSC initiates an initial INVITE session switch request to the AT-AS, and carries the Request-URL Request-Uniform Resource Identifier and the SDP supported by the MGW.
  • the Request-URI is the STN-SR.
  • the AT-AS associates the local end with the remote end to negotiate media resources and complete the domain switching process.
  • the AT-AS releases the original UE's call in the PS domain.
  • the AT-AS allocates SRVCC to the UE during the UE registration process of the SRVCC.
  • the handover number the UE of the SRVCC uses the SRVCC handover number as an identifier when the domain is switched.
  • the function of the ATCF is specifically implemented by the SCC-AS of the visited domain, that is, the AT-AS described above is specifically implemented by the SCC-AS. In the embodiments described below, this is no longer specifically emphasized.
  • Embodiment 4 is a flow chart of Embodiment 1 of a method for switching a single wireless voice call continuity domain according to the present invention. As shown in FIG. 4, the method for switching a single wireless voice call continuity domain of the present invention specifically includes the following steps:
  • Step 401 The SRVCC user UE-A carries the SDP in the PS domain to initiate a call to the UE-B, and the UE-A has been anchored to the AT-AS; the primary and the called user establish a call and enter a steady state;
  • the UE A reports the radio access signal to the E-UTRAN, and the E-UTRAN decides to trigger the SRVCC handover to the CS domain according to the radio access signal (for example, the current PS domain radio signal is poor, and is not suitable for communication); the MSC carries the STN-SR Initiating a session switching operation;
  • Step 402 The MSC initiates an initial INVITE session switching request to the AT-AS&&MRFP, and carries the Request-URI and the SDP supported by the MGW, where the Request-URI is the STN-SR.
  • Step 403 the AT-AS&&MRFP connects the local UE and the remote end. The UE performs association and prepares to perform an update operation on the remote UE.
  • Step 404 AT-AS&&MRFP sends a REINVITE message to update the remote UE;
  • Step 405 the P-CSCF forwards the REINVITE message to the home domain IMS;
  • Step 406 the home domain IMS sends an update media resource message to the terminal UE-B;
  • Step 407 UE B replies with 200 OK, and carries the terminal media capability of UE-B;
  • Step 408 the home domain IMS forwards the response message to the visited domain P-CSCF;
  • Step 409 the visited domain P-CSCF forwards 200 OK to the AT-AS&&MRFP;
  • Step 410 AT-AS&&MRFP forwards to the MSC
  • Step 411 the MSC replies with an ACK
  • Step 412 AT-AS&&MRFP forwards the ACK to the P-CSCF;
  • Step 413 The P-CSCF forwards the ACK message to the home domain IMS.
  • Step 414 the home domain IMS forwards the ACK message to the terminal UE-B;
  • FIG. 5 is a flowchart of Embodiment 2 of a method for switching a single wireless voice call continuity domain according to the present invention. As shown in FIG. 5, the method for switching a single wireless voice call continuity domain of the present invention specifically includes the following steps:
  • Step 501 The SRVCC user UE-A carries the SDP in the PS domain to initiate a call to the UE-B, and the UE-A has been anchored to the AT-AS; the calling and called user establishes a call and enters a steady state;
  • the UE A reports the radio access signal to the E-UTRAN, and the E-UTRAN decides to trigger the SRVCC handover to the CS domain according to the radio access signal;
  • the MSC carries the STN-SR to initiate a session handover operation;
  • the MSC initiates an initial INVITE session handover request to the AT. - AS&&MRFP, and carrying the Request-URI and the SDP supported by the MGW, wherein the Request-URI is the STN-SR;
  • the AT-AS&&MRFP associates the local UE with the remote UE, and prepares to perform an update operation on the remote UE;
  • Step 504 AT-AS&&MRFP sends a REINVITE message to update the remote UE; AT-AS&&MRFP directly sends an update message to the home domain;
  • Step 505 the home domain IMS sends an update media resource message to the terminal UE-B;
  • Step 506 UE-B replies with 200 OK, and carries the media capability of the terminal UE-B; Step 507, the home domain IMS forwards the response message to the AT-AS&&MRFP;
  • Step 508 AT-AS&&MRFP forwards to the MSC
  • Step 509 the MSC replies with an ACK
  • Step 510 AT-AS&&MRFP forwards the ACK home domain IMS
  • Step 511 the home domain IMS forwards the ACK message to the terminal UE-B;
  • the invention also discloses a switching system of a single wireless voice call continuity domain, which implements the function of the ATCF by using the AS, and implements the function of the ATGW by using the MRFP;
  • the AS is configured to perform media resource negotiation of the UE and its peer UE after receiving a domain handover request of the UE that has been anchored to the AS and the SRVCC on the MRFP, and implement domain switching.
  • the specific structure of the switching system of the single wireless voice call continuity domain of the present invention can be understood by referring to the structures shown in Figs. 2 and 3 above.
  • the present invention has not been modified, but the functions of the relevant network elements therein have been expanded.
  • the AS is further configured to: when the media resource negotiation of the UE and the peer UE is performed, or the AS is further used to directly send the mediation when performing media resource negotiation between the UE and the peer UE thereof.
  • the update request of the peer UE media resource is further configured to: when the media resource negotiation of the UE and the peer UE is performed, or the AS is further used to directly send the mediation when performing media resource negotiation between the UE and the peer UE thereof.
  • the P-CSCF releases the call of the UE in the packet switched PS domain;
  • the AS When the AS directly sends an update request to the peer UE media resource, the AS releases the call of the UE in the packet switched PS domain.
  • the domain handover request is initiated by a mobile switching center MSC of the circuit switched CS domain in which the UE is located.
  • the UE is further configured to: report the radio access signal to the E-UTRAN;
  • the E-UTRAN is further configured to: according to the radio access signal of the UE, determine to trigger the SRVCC to switch to the CS domain;
  • the initial INVITE session switching request is initiated by the MSC to the AS.
  • the initial INVITE session switching request carries a Request-URI and a session description protocol SDP supported by the media gateway, where the Request-URI is an STN-SR.
  • the function of the ATCF is implemented by using the AS in the existing system, and the function of the ATGW is implemented by using the MRFP.
  • the AS and the MRFP are the existing network elements in the current system, the introduced network elements are not required to be introduced after the ATCF and the ATGW function are introduced.
  • the interface involved is changed, and the current protocol changes are inevitably smaller. This not only protects the investment of the existing network system, but also facilitates the maintenance of the network system and saves the cost of implementing the SRVCC domain handover implementation.

Landscapes

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

Abstract

L'invention porte sur un procédé de transfert de domaine de continuité d'appel vocal radio unique, utilisant un serveur d'application (AS) pour mettre en œuvre la fonction d'une ATCF et utilisant un processeur de fonction de ressource multimédia (MRFP) pour mettre en œuvre la fonction d'une ATGW. Le procédé comprend en outre l'opération suivante : après réception d'une requête de transfert de domaine en provenance d'un équipement utilisateur (UE) à continuité d'appel vocal radio unique (SRVCC) qui a été ancré à l'AS et au MRFP, l'AS effectue une négociation de ressource multimédia entre l'UE et un UE d'extrémité homologue, de manière à mettre en œuvre un transfert de domaine. L'invention porte également sur un système de transfert de domaine de continuité d'appel vocal radio unique pour mettre en œuvre le procédé. La présente invention apporte précisément peu de changements à des protocoles courants, de manière à protéger les investissements dans le système de réseau existant et à faciliter la maintenance du système de réseau, ce qui économise le coût de mise en œuvre d'un transfert de domaine SRVCC amélioré.
PCT/CN2012/074315 2011-05-04 2012-04-18 Procédé et système pour transfert de domaine de continuité d'appel vocal radio unique WO2012149866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110114267.XA CN102769880B (zh) 2011-05-04 2011-05-04 单一无线语音呼叫连续性域的切换方法及系统
CN201110114267.X 2011-05-04

Publications (1)

Publication Number Publication Date
WO2012149866A1 true WO2012149866A1 (fr) 2012-11-08

Family

ID=47097101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/074315 WO2012149866A1 (fr) 2011-05-04 2012-04-18 Procédé et système pour transfert de domaine de continuité d'appel vocal radio unique

Country Status (2)

Country Link
CN (1) CN102769880B (fr)
WO (1) WO2012149866A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109891917A (zh) * 2016-09-29 2019-06-14 T移动美国公司 使用兼容的有效负载的网络-终端互操作

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104883672A (zh) * 2014-02-28 2015-09-02 中兴通讯股份有限公司 语音呼叫连续性业务中的媒体锚定方法及装置
CN107635217B (zh) * 2016-07-18 2021-04-20 中兴通讯股份有限公司 一种改进的eSRVCC切换实现方法及装置
CN108156634B (zh) * 2016-12-02 2022-08-19 中兴通讯股份有限公司 业务处理方法、装置及系统
CN110225558B (zh) * 2018-03-02 2021-07-09 中国移动通信集团设计院有限公司 跨区域通话处理方法、MME、HSS和eMSC

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101227677A (zh) * 2008-02-05 2008-07-23 中兴通讯股份有限公司 一种单无线信道语音业务连续性的域切换方法
CN101459891A (zh) * 2008-03-25 2009-06-17 中兴通讯股份有限公司 单无线信道语音业务连续性的切换方法
CN101594647A (zh) * 2008-05-28 2009-12-02 华为技术有限公司 一种sr vcc业务切换处理方法及设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854686A (zh) * 2009-03-30 2010-10-06 上海贝尔股份有限公司 一种用于减小切换VoIP呼叫时的中断时间的方法和设备
MY159634A (en) * 2009-11-10 2017-01-13 ERICSSON TELEFON AB L M (publ) Handover delay optimization

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101227677A (zh) * 2008-02-05 2008-07-23 中兴通讯股份有限公司 一种单无线信道语音业务连续性的域切换方法
CN101459891A (zh) * 2008-03-25 2009-06-17 中兴通讯股份有限公司 单无线信道语音业务连续性的切换方法
CN101594647A (zh) * 2008-05-28 2009-12-02 华为技术有限公司 一种sr vcc业务切换处理方法及设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MUHONG XU: "Analysis for SRVCC Enhancements", NETWORK TECHNOLOGY, vol. 12, December 2010 (2010-12-01), pages 13 - 15 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109891917A (zh) * 2016-09-29 2019-06-14 T移动美国公司 使用兼容的有效负载的网络-终端互操作

Also Published As

Publication number Publication date
CN102769880A (zh) 2012-11-07
CN102769880B (zh) 2017-04-05

Similar Documents

Publication Publication Date Title
US9467907B2 (en) Handover of user-equipment (UE) undetected emergency calls
EP2957125B1 (fr) Technique pour transférer une session avec un état de session variable
US9025553B2 (en) Capability update in a telecommunications network
US8687587B2 (en) Inter-subsystem transfers
EP2957126B1 (fr) Synchronisation des états d'appel d'un composant réseau et d'un dispositif mobile au niveau du transfert de session
WO2012025007A1 (fr) Procédé et système pour l'obtention d'une capacité d'équipement utilisateur par un équipement utilisateur, un serveur de données d'abonné résidentiel et un élément de réseau central
JP2009509479A (ja) コールの継続を支援する無線通信方法およびシステム
KR101410299B1 (ko) Ｉｓｃ 세션 전송에서의 시그널링 지연을 감소시키기 위한 방법, 네트워크 유닛들 및 시스템
EP2254308B1 (fr) Procédé, dispositif et système de remplacement de canal de signalisation de commande de service
US20090262706A1 (en) Method, system and device for converting session control signaling
WO2007025473A1 (fr) Systeme de terminaison d'appel de domaine cs, procede et reseau
WO2012024908A1 (fr) Procédé et système permettant de rapporter la capacité d'un terminal
WO2012149866A1 (fr) Procédé et système pour transfert de domaine de continuité d'appel vocal radio unique
EP2485530B1 (fr) Système et procédé de commutation de session d'état de sonnerie à tonalité d'alerte personnalisée
WO2012041026A1 (fr) Procédé et système pour transférer des services d'un domaine à commutation de circuits à un domaine à commutation de paquets
WO2011127790A1 (fr) Procédé et système pour entretenir une session de continuité d'appel vocal radio unique
WO2011057568A1 (fr) Procédé et système pour réaliser un transfert de session
WO2011130949A1 (fr) Procédé et système de mise en œuvre de continuité de communication vocale radio unique inverse
US20130045743A1 (en) Handover
WO2011134341A1 (fr) Procédé et système pour réaliser une continuité d'appel vocal radio unique inverse
CN101835222B (zh) 终端从家庭基站切换到宏蜂窝系统保持会话的方法和系统
WO2014023139A1 (fr) Système et procédé pour prendre en charge un même numéro en utilisant srvcc
WO2013064105A1 (fr) Procédé et dispositif de commutation d'un support à continuité des appels vocaux radio uniques inverses
WO2011130954A1 (fr) Méthode et système permettant la continuité d'appels radio vocaux simples
WO2011023054A1 (fr) Procédé et système de synchronisation pour capacité multisession dans le sous-système multimédia ip (ims) de réseau d'infrastructure

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12779669

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12779669

Country of ref document: EP

Kind code of ref document: A1