WO2009000123A1 - Procédé pour un contrôleur de passerelle multimédia contrôlant une source de circuit prioritaire d'une passerelle multimédia - Google Patents

Procédé pour un contrôleur de passerelle multimédia contrôlant une source de circuit prioritaire d'une passerelle multimédia Download PDF

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Publication number
WO2009000123A1
WO2009000123A1 PCT/CN2007/003830 CN2007003830W WO2009000123A1 WO 2009000123 A1 WO2009000123 A1 WO 2009000123A1 CN 2007003830 W CN2007003830 W CN 2007003830W WO 2009000123 A1 WO2009000123 A1 WO 2009000123A1
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WO
WIPO (PCT)
Prior art keywords
mgc
mgw
circuit
circuit resource
preemption
Prior art date
Application number
PCT/CN2007/003830
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English (en)
Chinese (zh)
Inventor
Dongzi Ning
Hui Cai
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Publication of WO2009000123A1 publication Critical patent/WO2009000123A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers

Definitions

  • the invention relates to a method for controlling a media gateway (MGGW) by a Media Gateway Controller (MGC) in a Next Generation Network (NGN) of a digital mobile communication, and particularly relates to an MGC control MGW circuit resource in an NGN system. Preemption method.
  • MGW media gateway
  • NGW Next Generation Network
  • Telecommunication Union Telecommunication Standardization Sector responsible for the development and revision of telecommunications standards in the Telecommunications Union.
  • H.248 protocol a system and method for controlling MGW by MGC is defined.
  • the H.248 protocol continuously expands the functionality of the protocol by defining functional packages, and the different functional packages are required for different applications.
  • the H.248 protocol is widely applied to the core of systems such as WCDMA (Wideband Code Division Multiple Access) / CDMA2000 (Code Division Multiple Access 2000) / TD-SCDMA (Time Division 1 Synchronous Code Division Multiple Access) / SOFTSWITCH (Softswitch) network.
  • WCDMA Wideband Code Division Multiple Access
  • CDMA2000 Code Division Multiple Access 2000
  • TD-SCDMA Time Division 1 Synchronous Code Division Multiple Access
  • SOFTSWITCH Softswitch
  • MGC and MGW are server and client modes, MGC is the server, and MGW is the client.
  • MGC will instruct the MGW to establish a context data area, and then add two terminal data areas in the context data area for characterizing different media bearers and their associated attributes, where the media bearer can be time division multiplexed (TDM). , Time Division Multiplexing ) Circuitry, or other types of carriers.
  • TDM time division multiplexed
  • the MGW is responsible for the management of the circuit resource status and the connection between the circuits; and the MGC is responsible for the call signaling negotiation and the TDM circuit resource management, that is, the MGC instructs the MGW to occupy a specific circuit according to the call signaling requirement. To complete the connection between the circuits.
  • the data between the context data area and the terminal data area between the MGC and the MGW will be synchronized, that is, the current call MGC indicates that the MGW occupies a certain circuit resource, and the current call to the MGC at the end of the call, because the MGC and Communication layer message loss between MGW, MGC or MGW If an internal fault occurs, the data in the context data area and the terminal data area between the MGC and the MGW will not match, and the garbage data in the context data area and the terminal data area will be generated, which will affect the normal progress of subsequent calls.
  • the MGW when the MGW fails to release the circuit resources and the corresponding data in the context data area and the terminal data area at the end of the call, the MGW mistakenly considers the circuit when the next call MGC that needs the circuit resource indicates that the MGW occupies the circuit resource.
  • the resource is a duplicate circuit resource, and the MGC "3 ⁇ 4 wrong, making the next call fail.
  • ITU-T defines a functional package H.248.36.
  • a periodic timer is defined for each terminal data area of the MGW.
  • the MGW reports a heartbeat event to the MGC, informing the MGC of its current context information and terminal information.
  • the MGC can directly send the delete command to clear the context and terminal information hanged in the MGW, or not to respond to the MGW.
  • the MGW deletes the hang-up message when it receives the delete command; or, after the MGW does not receive the MGC response several times, it can delete the hang-up information by itself.
  • the heartbeat timer will take a long time. H.248.36 suggests that the heartbeat duration is several times the average talk duration.
  • the above method of H.248.36 causes the garbage data processing between the MGC and the MGW to be untimely, thereby causing the subsequent call to be abnormal. Because the MGW encounters MGC repeated circuit resource add commands during this process, it is common practice to report syntax errors to the MGC. As a result, it is possible to cause some circuits in the call that need to be added in time to be added, which may result in the failure of the call.
  • the MGC Since all the information of the TDM circuit resources is managed by the MGC, the MGC knows which circuit resources need to be added during the current call, and the MGW as the client should be able to execute the operation commands of the circuit in full accordance with the latest commands of the MGC, instead of passively Wait until the heartbeat timeout clears the above garbage data before executing the MGC command to add circuit resources.
  • the technical problem to be solved by the present invention is to provide a method for a media gateway controller to control a media gateway to preempt circuit resources, so as to effectively solve the problem between the MGW and the MGC in the H.248 protocol.
  • the MGW cannot properly add circuit resources to the call in time due to the mismatch between the context data area and the terminal data area data between the MGC and the MGC.
  • the present invention provides a method for controlling a media gateway circuit resource preemption by a media gateway controller, including the following steps:
  • the media gateway controller MGC includes preemption control information in a circuit resource addition command sent to the media gateway MGW;
  • the MGW determines whether to preempt the circuit resource according to the preemption control information when the circuit resource is repeatedly occupied, and returns a response message to the MGC according to the result of the adding circuit.
  • step (a) the MGC sets the preemption control information to preempt the circuit resources or not preempt.
  • step (a) if the preemption control information is set to preemption, in step (b), the MGW actively preempts the circuit resource, and actively deletes the context data. Data in the zone that is originally associated with the circuit resource, and a response message that adds a correct circuit to the MGC; and if in step (a), the preemption control information is set to not preempt, then in step (b) The MGW returns a response message to the MGC to add an error circuit, indicating that the current call fails.
  • the MGC further adds a request for the MGW to preempt the circuit resource information on the MGC in the circuit resource addition command sent to the MGW;
  • the step (b) further includes the step of the MGW actively preempting the circuit resource and reporting the preemption of the circuit resource information to the MGC.
  • the foregoing method further has the following feature: the request for the MGW to report the preemption of the circuit resource information to the MGC includes a function package list and additional positioning information for preempting the circuit resource.
  • the preemption circuit resource information includes a text ID and a terminal ID.
  • the foregoing method further has the following features:
  • the method is compatible with the H.248 protocol, and in the step (b), the MGW returns a response message to the MGC by using a notification message of the H.248 protocol.
  • the foregoing method further has the following features: the step (b) further includes: when the MGW does not encounter repeated occupied circuit resources, normally adding corresponding circuit resources, and returning a correct response to the added circuit resources to the MGC. The steps of the message.
  • the circuit resource preemption function of the method can be turned on or off through negotiation between the MGC and the MGW.
  • the call can be guaranteed to be normal when the data of the MGC and the MGW context data area and the terminal data area are inconsistent, and the garbage data appearing between the MGC and the MGW can be actively cleaned in time, thereby enhancing the stability of the system.
  • FIG. 1 is a flow chart of the MGW being controlled by the MGC and preempting circuit resources in time according to an embodiment of the present invention. Preferred embodiment of the invention
  • the present invention extends a method for controlling the media gateway circuit resource preemption by the media gateway controller based on H.248.36, including the following steps: (a) Circuit resources between the MGC and the MGW The preemption control information is included in the add command; (b) according to the preemption control information, the MGW does not report a syntax error to the MGC when the repeated occupied circuit resources are encountered (that is, the added circuit is occupied), and directly preempts the context data. The circuit resources in the zone are then notified to the MGC by using the notification message of the H.248 protocol. In addition, the MGC and the MGW can turn on or off the circuit resource preemption function according to negotiation.
  • the MGC control MGW circuit resource preemption method described in this embodiment includes the following steps: Step 1: When the MGC sends a circuit resource add command to the MGW, the preemption control information is included in the control parameter, and the parameter of the control information is set to preemption or Not preempting;
  • the MGC settings request the MGW to actively preempt the sttf attribute of the TDM circuit resource, and if the MGW An ai event that actively reports additional information when TDM circuit resources are preempted internally;
  • the sttf attribute set by the MGC in the circuit resource add command is defined as follows:
  • Attribute Name Actively preempts TDM circuit resources
  • Attribute parameter type Logic
  • Attribute parameter value If there are duplicate circuit resources in the MGW,
  • Event name The MGW actively preempts the TDM circuit resources and reports additional information.
  • Event ID ai (0x0001)
  • Function Description Defines that the MGW actively preempts the TDM circuit resources and reports additional information. The event exists: Optional.
  • Step 2 After receiving the circuit resource addition command sent by the MGC, the MGW determines whether there is a duplicate circuit resource, and returns a response to the MGC according to the result of adding the circuit.
  • the MGW determines that there is a duplicate circuit resource in the command sent by the MGC, if the parameter of the preemption control information is preemption (the value of the sttf attribute parameter is true), the MGW actively preempts the TDM circuit resource, and deletes the original and the context data area. After the data associated with the circuit resource is executed, step 3 is performed. If the preemption information parameter is not preempted (the value of the sttf attribute parameter is false), the MGW reports an error message to the MGC, indicating that there is already a duplicate circuit resource, and the call fails.
  • Step 3 After completing the preemption of the circuit resources, the MGW notifies the MGC of the additional information preempted by the circuit resources according to the indication that the MGC reports the additional information (that is, the definition of the ai event in the issued command of the MGC). In step 3, the MGW reports the additional information of the circuit resource preemption to the MGC, including a function package list carrying the preempted resources and additional positioning information.
  • the additional information parameters that the MGW informs the MGC to preempt the circuit resources are defined as follows:
  • Function Description Define additional information to report the details of the circuit resources required by the MGC to be preempted and the circuit resources required in the terminal data area.
  • Parameter mode Optional. That is, when the MGC has an indication of the additional information (the definition of the ai event) in the issued command, the MGW performs the preemption of the circuit resource, and then notifies the MGC of the additional information of the preempted circuit resource through the ai parameter; and the command issued by the MGC There is no indication that the additional information is reported (the definition of the ai event is not), and the MGW does not have to notify the MGC of the additional information of the preempted circuit resource after performing the preemption of the circuit resource.
  • the MGW does not have to notify the MGC of the additional information of the preempted circuit resource after performing the preemption of the circuit resource.
  • the parameter may take values: It is recommended to include a text ID and a terminal ID. Other useful information can also be added to the additional information.
  • the processing flow in the MGW compatible with the H.248 message in this embodiment is shown.
  • the process includes the following steps:
  • Step 101 The MGW receives a circuit resource addition command sent by the MGC.
  • Step 102 The MGW determines whether there is a circuit resource that is repeatedly occupied. If yes, go to step 103, if not, go to step 104;
  • Step 103 Continue to determine if the MGC sets the sttf attribute to preemptible? If yes, go to step 105; if no, go to step 106;
  • Step 104 The MGW adds corresponding circuit resources, and then performs step 108;
  • Step 105 The MGW actively preempts the corresponding circuit resources, and then performs step 107;
  • Step 106 The MGW returns a response to the MGC to add an error circuit, and the process ends.
  • Step 107 This step is optional. If the MGC carries the ai event in the command in step 101, The MGW notifies the MGC of the preempted additional information, otherwise the MGW does not report any information to the MGC.
  • Step 108 The MGW returns a response to add the correct circuit to the MGC using the notification message of the H.248 protocol, and the process ends.
  • steps 1 to 3 of the above method of the present invention can be more clearly understood.
  • the MGC and the MGW may turn off the circuit resource preemption function by negotiation (e.g., messaging or other means).
  • the method provided by the invention can be compatible with the original method of H.248.36, and is simple and easy, and in the case that the gram does not match, the use of the relevant circuit resources cannot restore the defects of the normal call in time, and the stability of the system is enhanced.
  • the MGC control MGW circuit resource preemption method provided by the present invention is simple and convenient, and the call can be guaranteed to be normal and active when the data of the MGC and the MGW context data area and the terminal data area are inconsistent. Clean up the garbage data between MGC and MGW in time, thus enhancing the stability of the system.

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

Abstract

Un procédé pour un contrôleur de passerelle multimédia contrôlant une source de circuit prioritaire d'une passerelle multimédia comprend les étapes suivantes : (a) les informations de commande prioritaires sont acheminées dans une ressource de circuit ajoutant une commande transmise à partir d'un contrôleur de passerelle multimédia MGC à une passerelle multimédia MGW ; (b) lorsque la MGW a trouvé que la ressource de circuit est occupée à plusieurs reprises, elle détermine s'il faut donner la priorité à la ressource de circuit en fonction des informations de commande prioritaires, et renvoie un message de réponse au MGC sur la base du résultat de l'ajout du circuit. A la différence de l'art antérieur, le procédé de mise en priorité est facile à réaliser, garantit qu'un appel se poursuit normalement même au cas où la région de données contextuelles et la région de données du terminal entre le MGC et la MGW ne sont pas concordantes, et nettoie les données déchets entre le MGC et la MGW initialement et à temps ; ainsi la stabilité du système est améliorée.
PCT/CN2007/003830 2007-06-25 2007-12-27 Procédé pour un contrôleur de passerelle multimédia contrôlant une source de circuit prioritaire d'une passerelle multimédia WO2009000123A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200710111480 CN101330478B (zh) 2007-06-25 2007-06-25 媒体网关控制器控制媒体网关电路资源抢占的方法
CN200710111480.9 2007-06-25

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WO2009000123A1 true WO2009000123A1 (fr) 2008-12-31

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1630424A (zh) * 2003-12-04 2005-06-22 埃沃柳姆公司 为根据关联的最大抢占速率建立服务从移动通信网抢占资源的方法
US20060045102A1 (en) * 2004-08-31 2006-03-02 Pelaez Mariana B Method for recovering a mismatch between a media gateway and a media gateway controller
CN1780229A (zh) * 2004-11-26 2006-05-31 华为技术有限公司 一种解决媒体网关滞留上下文的方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1867189A (zh) * 2006-01-21 2006-11-22 华为技术有限公司 一种组呼过程中紧急呼叫的实现方法及系统
CN100531453C (zh) * 2006-08-05 2009-08-19 华为技术有限公司 建立mbms业务信道及其辅公共控制物理信道的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1630424A (zh) * 2003-12-04 2005-06-22 埃沃柳姆公司 为根据关联的最大抢占速率建立服务从移动通信网抢占资源的方法
US20060045102A1 (en) * 2004-08-31 2006-03-02 Pelaez Mariana B Method for recovering a mismatch between a media gateway and a media gateway controller
CN1780229A (zh) * 2004-11-26 2006-05-31 华为技术有限公司 一种解决媒体网关滞留上下文的方法

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CN101330478B (zh) 2011-04-20

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