WO2017000584A1 - Procédé et appareil d'établissement de support, passerelle multimédia et système d'établissement de support vocal - Google Patents

Procédé et appareil d'établissement de support, passerelle multimédia et système d'établissement de support vocal Download PDF

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Publication number
WO2017000584A1
WO2017000584A1 PCT/CN2016/075785 CN2016075785W WO2017000584A1 WO 2017000584 A1 WO2017000584 A1 WO 2017000584A1 CN 2016075785 W CN2016075785 W CN 2016075785W WO 2017000584 A1 WO2017000584 A1 WO 2017000584A1
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Prior art keywords
terminal
bearer
emsc
vmsc
bicc
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PCT/CN2016/075785
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English (en)
Chinese (zh)
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赵明光
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中兴通讯股份有限公司
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Publication of WO2017000584A1 publication Critical patent/WO2017000584A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a bearer establishing method, apparatus, media gateway, and voice bearer establishing system.
  • Single Radio Voice Call Continuity is a single-channel voice continuity solution using IP Multimedia Subsystem (IMS) voice service network using Long Term Evolution (LTE) access. Program.
  • IMS IP Multimedia Subsystem
  • LTE Long Term Evolution
  • Program As shown in Figure 1, the SRVCC establishes a CS domain call leg when the user equipment (UE) moves from LTE to the circuit domain fallback (CS), and connects the CS branch and the original IMS to the call pair through the anchor point (SCC AS). The end branches are connected to form a complete call chain, keeping the IMS domain call able to continue after the handover.
  • IMS IP Multimedia Subsystem
  • the current mainstream LTE voice solution is to deploy an IMS network and a corresponding application server to provide voice services, that is, IMS-based voice services (VOLTE).
  • VOLTE IMS-based voice services
  • the initial coverage of network coverage is incomplete, voice calls may be interrupted, and SRVCC technology can be weaker in the fourth generation mobile communication technology (4G), the second generation mobile communication technology ( 2G), when the third-generation mobile communication technology (3G) signal is strong, the 4G voice call is switched to the 3G network, which can solve the network problem in the early 4G.
  • 4G fourth generation mobile communication technology
  • 2G second generation mobile communication technology
  • 3G third-generation mobile communication technology
  • the eMSC After receiving the SRVCC handover request from the mobility management entity (MME), the eMSC needs to establish two voice bearer branches.
  • the first path passes the interoffice signaling to the visited mobile switching center (VMSC) where the user drops back.
  • the interoffice signaling is generally For bearer-independent call control (BICC); the second through SIP inter-office signaling to call session control (CSCF), and through the anchor point (SCC AS), the CS branch and the original IMS to the call-to-end branch.
  • BICC bearer-independent call control
  • CSCF call session control
  • SCC AS anchor point
  • the second SIP bearer is established only after the first BICC bearer is established.
  • the SRVCC handover process is complicated and involves many network elements, especially in the scenario of deploying eMSC. Therefore, how to improve the handover speed and reduce the voice delay brought by the handover process has always been one of the popular research topics of SRVCC. .
  • the present invention provides a bearer establishment method, an apparatus, a media gateway, and a voice bearer establishment system, which solves the problem that the voice delay caused by the SRVCC handover process to the user is too long.
  • a bearer establishment method is provided, which is applied to a first media gateway (MGW1), the method comprising:
  • Second terminal Transmitting the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway (MGW2) to establish a voice bearer for the inbound side of the BICC relay of the VMSC to the eMSC.
  • MGW2 media gateway
  • the step of establishing a first terminal for performing voice bearer on the outgoing side of the bearer-independent call control BICC relay of the enhanced mobile switching center eMSC to the visited mobile switching center VMSC is specifically:
  • the step of sending the bearer information of the first terminal to the VMSC is specifically:
  • the eMSC And sending, by the eMSC, first terminal establishment success response information, so that the eMSC initiates a BICC initial request to the VMSC, where the first terminal establishes a success response information and the BICC.
  • the initial request carries the bearer information of the first terminal.
  • the step of the VMSC requesting the second media gateway MGW2 to establish a second terminal for performing voice transmission on the ingress side of the BICC relay of the VMSC to the eMSC specifically:
  • VMSC Receiving, by the VMSC, a BICC initial request that is sent by the eMSC and carrying the bearer information of the first terminal, and sending a second terminal setup request to the MGW2 according to the BICC initial request, so that the MGW2 is established to enable the
  • the VMSC sends a second terminal for voice bearer to the ingress side of the BICC relay of the eMSC, and when the second terminal is established, returns a second terminal setup success response message to the VMSC.
  • the user plane initialization request for turning on the voice bearer of the first terminal and the second terminal is sent to the MGW 2 according to the bearer information of the first terminal and the bearer information of the second terminal. Thereafter, the method further includes:
  • the CSCF is controlled to send a Session Initiation Protocol SIP voice bearer release request.
  • a bearer establishing apparatus is further applied to the first media gateway MGW1, the device comprising:
  • a sending module configured to send the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway MGW2 to establish an inbound side of the BICC relay for the VMSC to the eMSC to perform voice The second terminal carried;
  • a receiving module configured to receive bearer information of the second terminal that is sent by the MGW 2 after the second terminal is established
  • a switch-on module configured to send, to the MGW2, a user plane for turning on the voice bearer of the first terminal and the second terminal according to the bearer information of the first terminal and the bearer information of the second terminal Initializing the request and notifying the eMSC that the BICC bearer branch is established.
  • the establishing module includes:
  • a receiving unit configured to receive a first terminal setup request sent by the eMSC after receiving a single channel continuous service SRVCC handover request sent by the mobility management entity MME;
  • a establishing unit configured to establish, according to the first terminal setup request, a first terminal that performs voice bearer on an outgoing side of the BICC relay that causes the eMSC to the VMSC.
  • the sending module includes:
  • a requesting unit configured to: when the first terminal is established, send, to the eMSC, first terminal establishment success response information, so that the eMSC initiates a BICC initial request to the VMSC, where the first terminal establishes a successful response.
  • the bearer information of the first terminal is carried in both the information and the initial request of the BICC.
  • the sending module further includes:
  • a triggering unit configured to trigger the VMSC to receive a BICC initial request that is sent by the eMSC and carry the bearer information of the first terminal, and send a second terminal setup request to the MGW2 according to the BICC initial request, so that the The MGW 2 establishes a second terminal for performing voice bearer on the ingress side of the BICC relay of the VMSC to the eMSC, and returns a second terminal establishment success response message to the VMSC when the second terminal is established.
  • the device further comprises:
  • a releasing module configured to notify the eMSC that the BICC bearer branch establishment fails when the voice bearer of the first terminal and the second terminal is not connected, so that the eMSC sends a BICC voice bearer release to the VMSC
  • the request sends a session initiation protocol SIP voice bearer release request to the call session control CSCF.
  • a media gateway comprising the bearer establishing apparatus described above.
  • a voice bearer establishment system including: a mobility management entity MME, an enhanced mobile switching center eMSC, a second media gateway MGW2, a visited mobile switching center VMSC, a call session control CSCF, and the foregoing The media gateway.
  • the embodiment of the present invention further provides a bearer establishing device, which is applied to the first media gateway (MGW1), and includes:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • Second terminal Transmitting the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway (MGW2) to establish a voice bearer for the inbound side of the BICC relay of the VMSC to the eMSC.
  • MGW2 media gateway
  • Embodiments of the present invention also provide a non-transitory computer readable storage medium having stored therein instructions that, when executed by a processor of a first media gateway (MGW1), cause the first media gateway ( MGW 1) implements a bearer establishment method, the method comprising the following steps:
  • Second terminal Transmitting the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway (MGW2) to establish a voice bearer for the inbound side of the BICC relay of the VMSC to the eMSC.
  • MGW2 media gateway
  • the bearer establishing method of the present invention when establishing the BICC bearer branch, respectively, establishes a first terminal for performing voice bearer on the outgoing side of the BICC relay for eMSC to the VMSC, and a BICC for relaying the VMSC to the eMSC, respectively.
  • the second terminal of the voice receiving is performed on the ingress side, and the second terminal is established, and the MGW1 learns the bearer information of the second terminal.
  • the MGW2 learns the bearer information of the first terminal, the voice bearer of the first terminal and the second terminal is connected.
  • FIG. 1 is a schematic diagram showing the principle of a prior art SRVCC handover procedure
  • FIG. 2 is a flowchart of a bearer establishment method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of an application of a bearer establishment method according to an embodiment of the present invention.
  • FIG. 4 is a second flowchart of application of a bearer establishment method according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a bearer establishing apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a setup module according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing the structure of a transmitting module according to an embodiment of the present invention.
  • a bearer establishment method for application to MGW1.
  • a bearer-independent call control BICC relay for establishing an enhanced mobile switching center eMSC to a visited mobile switching center VMSC is provided.
  • the outgoing terminal performs the first terminal of the voice bearer; then, the bearer information of the first terminal is sent to the VMSC, so that the VMSC requests the second media gateway MGW2 to establish the VMSC to the eMSC.
  • the bearer information of the second terminal sends a user plane initialization request for turning on the voice bearer of the first terminal and the second terminal to the MGW2, and notifies the eMSC that the BICC bearer branch establishment is completed.
  • the method for establishing a bearer in the embodiment of the present invention can enable the process of connecting the voice bearer of the first terminal and the voice bearer of the second terminal to be synchronized with the establishment process of the SIP bearer branch, thereby shortening the handover process to a certain extent.
  • the user's voice delay increases the user experience.
  • the method includes:
  • Step S21 Establish a first terminal for performing voice bearer on the outgoing side of the bearer-independent call control BICC relay for the enhanced mobile switching center eMSC to the visited mobile switching center VMSC.
  • step S21 specifically includes:
  • the user terminal When the user terminal moves from the LTE network to the CS domain, the user terminal sends a handover request to the MME, and the MME notifies the eMSC to the eMSC through the Sv interface, so that the eMSC sends the setup request of the first terminal to the MGW1.
  • the eMSC sends a first terminal setup request to the MGW 1 through the extended information of the H248.
  • the MGW1 After receiving the establishment request, the MGW1 establishes the first terminal, so that the eMSC can go to the outgoing side voice bearer of the BICC relay of the VMSC.
  • Step S23 Send the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway MGW2 to establish a voice bearer for the inbound side of the BICC to be forwarded by the VMSC to the eMSC.
  • the second terminal Send the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway MGW2 to establish a voice bearer for the inbound side of the BICC to be forwarded by the VMSC to the eMSC.
  • the step of the VMSC requesting the second media gateway MGW2 to establish a second terminal for performing voice transmission on the ingress side of the BICC relay of the VMSC to the eMSC specifically:
  • VMSC Receiving, by the VMSC, a BICC initial request that is sent by the eMSC and carrying the bearer information of the first terminal, and sending a second terminal setup request to the MGW2 according to the BICC initial request, so that the MGW2 is established to enable the
  • the VMSC sends a second terminal for voice bearer to the ingress side of the BICC relay of the eMSC, and when the second terminal is established, returns a second terminal setup success response message to the VMSC.
  • the bearer information of the first terminal that is, the information about the egress of the eMSC
  • the VMSC requests the MGW2 to establish the second terminal, so that the VMSC
  • the voice bearer can be carried to the incoming side of the BICC relay of the eMSC.
  • the MGW1 After the first terminal is established, the MGW1 sends a first terminal setup success response message to the eMSC, that is, the bearer information of the first terminal is notified to the eMSC, and the eMSC initializes the BICC after receiving the first terminal establishment success response information.
  • the form of the request informs the VMSC of the bearer information of the first terminal.
  • the first terminal is established, that is, the first voice channel is established, and the second terminal is established, that is, the second voice channel is established; and when the voice bearer of the first terminal is connected to the voice bearer of the second terminal, that is, the first voice channel is When the second voice channel is turned on, the BICC bearer branch is considered to be successfully established.
  • Step S25 Receive bearer information of the second terminal that is sent by the MGW 2 after the second terminal is established.
  • the MGW2 replies to the VMSC with a second terminal establishment success response information, and informs the VMSC of the bearer information of the second terminal, that is, the information about the inbound side of the VMSC, so that the VMSC returns the BICC application to the eMSC.
  • the message is delivered, where the bearer information of the second terminal is carried.
  • Step S27 Send a user plane initialization request for turning on the voice bearer of the first terminal and the second terminal to the MGW 2 according to the bearer information of the first terminal and the bearer information of the second terminal, where And notifying the eMSC, the BICC bearer branch is established.
  • the MGW sends the initialization request, and it takes about 0.5 seconds to receive the response.
  • the value may increase. , greatly affecting the user experience.
  • the bearer establishing method in the embodiment of the present invention is connected after the MGW 2 learns the bearer information of the first terminal.
  • the voice of the first terminal and the second terminal are carried, only the user plane initialization request for the connection needs to be sent, and the eMSC is directly notified to the eMSC, and the BICC bearer branch is established, so that the user plane initialization process of the MGW and the eMSC are performed.
  • the process of establishing a SIP bearer branch can be performed simultaneously, which improves the speed of the SRVCC handover process to a certain extent, thereby improving the user experience.
  • the method further includes:
  • the CSCF is controlled to send a Session Initiation Protocol SIP voice bearer release request.
  • the bearer establishment method of the embodiment of the present invention is applied in the SRVCC handover as shown in FIG. 3 and FIG. 4.
  • Step 301 The eMSC receives an SRVCC handover request of the MME.
  • Step 302 The eMSC prepares an outbound voice bearer to the BICC trunk of the VMSC, and initiates a first terminal setup request to the MGW 1;
  • Step 303 The MGW1 establishes a first terminal, and returns a success response to the eMSC, and notifies the eMSC of the bearer information of the first terminal, that is, the information about the egress of the eMSC.
  • Step 304 After the terminal is established, the eMSC initiates a BICC initial request to the VMSC that the user actually drops, and carries the eMSC outgoing side bearer related information.
  • Step 305 After receiving the initial request of the BICC, the VMSC initiates a second terminal setup request to the MGW 2 to prepare an inbound voice bearer.
  • Step 306 The MGW2 establishes a terminal, and returns a success response to the VMSC, and informs the VMSC of the bearer information of the second terminal, that is, the information about the inbound side of the VMSC.
  • Step 307 After the terminal is established, the VMSC returns a BICC application delivery message to the eMSC, where the inbound side of the VMSC carries the relevant information.
  • Step 308 After receiving the bearer information of the remote end, the eMSC initiates an outgoing-side terminal modification request to the MGW1, that is, the bearer information of the second terminal is sent to the MGW1, where the VMSC carries the relevant information of the inbound side;
  • Step 309 The MGW1 returns a successful response to the eMSC.
  • Step 310 The MGW 1 initiates, to the MGW 2, a user plane initialization request for turning on the voice bearers of the first terminal and the second terminal.
  • Step 311 After sending the user plane initialization request, the MGW1 not directly waits for the response of the MGW2 to directly notify the eMSC that the inter-office bearer is established.
  • Step 312 The eMSC returns a notification response to the MGW1.
  • Step 313 At the same time, the MGW2 initializes successfully after receiving the user plane initialization request, and returns an initialization success response to the MGW1.
  • Step 314 The first path BICC voice bearer is established, and the eMSC sends a SIP setup request to the CSCF to start establishing a second voice bearer. Among them, step 313 and step 314 are actually parallel.
  • the MGW2 user plane initialization fails, that is, the voice bearer of the first terminal and the voice bearer of the second terminal cannot be connected, the MGW2 returns a failure response to the MGW1, and the specific process is as shown in FIG. 4:
  • Steps 401 to 412 are the same as steps 301 to 312 described above, and are not described herein again.
  • Step 413 The first path BICC voice bearer is established, and the eMSC sends a SIP setup request to the CSCF to start establishing a second voice bearer.
  • Step 414 At the same time, the MGW2 fails to initialize after receiving the user plane initialization request message, and returns a failure response to the MGW1.
  • Step 415 After receiving the initialization failure response, the MGW1 notifies the eMSC that the bearer establishment fails.
  • Step 416 The eMSC initiates a release request to the VMSC to release the BICC voice bearer.
  • Step 417 The eMSC1 initiates a release request to the CSCF to release the SIP voice bearer.
  • a bearer establishing device is further applied to the MGW 1.
  • the device 500 includes:
  • the establishing module 501 is configured to establish a first terminal for performing voice bearer on the outgoing side of the bearer-independent call control BICC relay of the enhanced mobile switching center eMSC to the visited mobile switching center VMSC;
  • the sending module 503 is configured to send the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway MGW2 to establish an inbound side of the BICC relay for the VMSC to the eMSC.
  • the receiving module 505 is configured to receive bearer information of the second terminal that is sent by the MGW 2 after the second terminal is established.
  • the switch-on module 507 is configured to send, according to the bearer information of the first terminal and the bearer information of the second terminal, a user for connecting the voice bearer of the first terminal and the second terminal to the MGW 2 Initializing the request and notifying the eMSC that the BICC bearer branch is established.
  • the establishing module 501 includes:
  • the receiving unit 5011 is configured to receive a first terminal setup request that is sent by the eMSC after receiving a single channel continuous service SRVCC handover request sent by the mobility management entity MME;
  • the establishing unit 5012 is configured to establish, according to the first terminal setup request, a first terminal that performs voice bearer for the outgoing side of the BICC relay of the eMSC to the VMSC.
  • the sending module 503 includes:
  • the requesting unit 5031 is configured to: when the first terminal is established, send the first terminal setup success response information to the eMSC, so that the eMSC initiates a BICC initial request to the VMSC, where the first terminal is successfully established.
  • the bearer information of the first terminal is carried in both the response information and the initial request of the BICC.
  • the sending module 503 further includes:
  • the triggering unit 5032 is configured to trigger the VMSC to receive a BICC initial request that is sent by the eMSC and carry the bearer information of the first terminal, and send a second terminal setup request to the MGW2 according to the BICC initial request, so that the The MGW 2 establishes a second terminal for performing voice transmission on the ingress side of the BICC relay of the VMSC to the eMSC, and returns a second terminal establishment success response to the VMSC when the second terminal is established. information.
  • the apparatus further includes:
  • the releasing module 509 is configured to notify the eMSC that the BICC bearer branch establishment fails when the voice bearer of the first terminal and the second terminal is not connected, so that the eMSC sends a BICC voice bearer to the VMSC.
  • the release request sends a Session Initiation Protocol SIP Voice Bearer Release Request to the Call Session Control CSCF.
  • a media gateway is further provided, including the bearer establishing apparatus described above.
  • a voice bearer establishment system including: a mobility management entity MME, an enhanced mobile switching center eMSC, a second media gateway MGW2, a visited mobile switching center VMSC, and a call session control CSCF. And the media gateway described above.
  • a bearer establishing device is further applied to the first media gateway (MGW1), including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • Second terminal Transmitting the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway (MGW2) to establish a voice bearer for the inbound side of the BICC relay of the VMSC to the eMSC.
  • MGW2 media gateway
  • a non-transitory computer readable storage medium storing instructions stored when executed by a processor of a first media gateway (MGW1)
  • the first media gateway (MGW1) implements a bearer establishment method, and the method includes the following steps:
  • Second terminal Transmitting the bearer information of the first terminal to the VMSC, so that the VMSC requests the second media gateway (MGW2) to establish a voice bearer for the inbound side of the BICC relay of the VMSC to the eMSC.
  • MGW2 media gateway
  • the bearer establishment method and device of the present application can be applied to the media gateway MGW in the mobile communication system, so that the user plane initialization process of the MGW and the process of establishing the second SIP bearer by the eMSC can be performed simultaneously, and the SRVCC handover process is improved to some extent. speed.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil d'établissement de support, une passerelle multimédia et un système d'établissement de support vocal. Le procédé consiste : à établir un premier terminal pour permettre à un côté sortant d'un relais de commande d'appel indépendant du support (BICC) allant d'un centre de commutation mobile amélioré (eMSC) à un centre de commutation mobile visité (VMSC) de supporter des voix (S21) ; à envoyer des informations de support concernant le premier terminal au VMSC, de façon à permettre au MVSC de demander à une seconde passerelle multimédia (MGW2) d'établir un second terminal pour permettre à un côté entrant d'un relais BICC allant du VMSC au eMSC de supporter des voix (S23) ; à recevoir des informations de support concernant le second terminal, qui sont envoyées après que la MGW2 établit le second terminal (S25) ; et selon les informations de support concernant le premier terminal et les informations de support concernant le second terminal, à envoyer, à la MGW2, une requête d'initialisation de plan d'utilisateur pour connecter les supports vocaux du premier terminal et du second terminal, et à notifier au eMSC qu'un branchement de support BICC est établi (S27). Au moyen des solutions de la présente invention, le problème d'un retard vocal excessivement long provoqué au niveau d'un utilisateur dans un processus de commutation d'un service de continuité d'appel vocal radio unique (SRVCC), est résolu.
PCT/CN2016/075785 2015-06-30 2016-03-07 Procédé et appareil d'établissement de support, passerelle multimédia et système d'établissement de support vocal WO2017000584A1 (fr)

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WO2010127511A1 (fr) * 2009-05-08 2010-11-11 华为技术有限公司 Procédé, dispositif et système de commutation de srvcc et de transmission de ses données
WO2011014992A1 (fr) * 2009-08-07 2011-02-10 上海贝尔股份有限公司 Procédé et dispositif permettant de réduire le temps d'interruption lors d'un transfert d'un appel voix sur ip (voip)
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