WO2009100623A1 - Procédé pour réaliser un contrôle d'admission de service de multidiffusion en ngn - Google Patents

Procédé pour réaliser un contrôle d'admission de service de multidiffusion en ngn Download PDF

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Publication number
WO2009100623A1
WO2009100623A1 PCT/CN2008/070687 CN2008070687W WO2009100623A1 WO 2009100623 A1 WO2009100623 A1 WO 2009100623A1 CN 2008070687 W CN2008070687 W CN 2008070687W WO 2009100623 A1 WO2009100623 A1 WO 2009100623A1
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WO
WIPO (PCT)
Prior art keywords
service
user
multicast
request
transport layer
Prior art date
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PCT/CN2008/070687
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English (en)
Chinese (zh)
Inventor
Bo Wu
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 WO2009100623A1 publication Critical patent/WO2009100623A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
    • 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
    • H04L65/1066—Session management
    • H04L65/1073—Registration or de-registration
    • 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
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast

Definitions

  • the present invention relates to the field of communications, and in particular to a method for implementing multicast service admission control under a Next Generation Network (NGN) architecture.
  • NTN Next Generation Network
  • the multicast service mainly provides a point-to-multipoint service in which a data source sends data to multiple users, realizes network resource sharing, improves utilization of network resources, and supports multi-point to multi-point services. Typical services such as conferences TV and online games, etc.
  • each multicast service has a uniquely mapped multicast group identifier, and the user uses this identifier as a parameter to have IP functions.
  • the network device applies to join the business. Any user terminal can join the multicast group to receive all multicast group data and send data to the multicast group. As long as the user announces the join to the local router responsible for forwarding multicast, it can join the multicast group. It can be seen that this general IP multicast model does not perform any receiving control. If it is used for the transmission layer of the next generation network, Unable to meet the needs of next-generation network authentication, auditing, and billing.
  • the NGN architecture defined by the ITU-T International Telecommunication Union - Telecommunication Standardization Sector
  • the NGN network architecture is mainly divided into a service layer and a transport layer.
  • the service layer includes a service control layer and an application and service support layer.
  • the transport layer is divided into a transport control layer and a transport layer.
  • the transport control layer includes Network Attachment Control Functions (NACF) and resource admission control functions (Resource and Admission Control Functions (RACF), the transport layer includes the backbone network and the access network.
  • NACF Network Attachment Control Functions
  • RCF Resource Admission Control Functions
  • the service control layer provides resource control, registration, authentication, and authorization functions for different types of services at the service level.
  • the network attachment control function in the transmission control layer is mainly used for registration of network access, and is applicable to
  • the terminal is initialized to access the NGN service, and its main functions include:
  • the Resource Admission Control Function (RACF) in the Transport Control Layer is the medium for the NGN Service Layer and Transport Layer. As shown in Figure 2, the RACF consists of two parts: Policy Decision Functional Entity (PD-FE) and Transport Resource Control Functional Entity (TRC-FE).
  • PD-FE Policy Decision Functional Entity
  • TRC-FE Transport Resource Control Functional Entity
  • the PD-FE is independent of the specific transmission technology and is not related to the specific service.
  • the PD-FE performs resource decision and control based on the local network policy.
  • ITU-T defines a draft NGN multicast service functional framework to try to solve the control problem of multicast services.
  • the most important point of multicast service control is multicast.
  • Group management issues, multicast group management includes the following aspects:
  • ITU-T has determined that for the next generation network multicast service, the joining and leaving of the multicast group is the function of the transport layer of the user terminal; the creation and maintenance of the multicast group is a function of the NGN management layer; The publishing, discovery, authentication, and authorization of multicast groups are functions of the service layer.
  • the implementation method of admission control for multicast groups is still controversial.
  • the multicast function framework defined by ITU-T NGN-GSI Next Generation Network - Global Standard Initiative proposes to place multicast group admission control in the NACF or transport layer access of the NGN transport control layer. In the node, the admission control of the NGN multicast service is implemented.
  • ITU-T NGN-GSI Next Generation Network - Global Standard Initiative
  • the NACF is mainly used to control the access of the device to the network, save the subscription user ID (identifier), the device address, and the physical location of the device to provide services for subsequent NGN services.
  • the multicast service belongs to the NGN service. If the multicast group admission control is implemented through the NACF, the control information about the multicast service needs to be added to the network general database maintained by the NACF whenever a new multicast service is introduced.
  • the access nodes of the transport layer have a large number of configuration requirements when the number of users increases. Generally, one access node supports 400 users, so in order to support a large number of users, many access node devices are needed (for example, for 160,000 users, It requires 400 access node devices). This requires a lot of manual configuration by the network administrator.
  • placing the multicast group admission control in the NACF or the access node of the transport layer also limits the operation mode of the multicast service. If the network provider and the service provider are separated, the network is required when adding the multicast service. The provider adds the configuration data of each user to the newly added multicast service to the network device or the access node where the NACF is located. This will violate the principle that the NGN service and the transmission are separated.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for performing next-generation network multicast service admission control to meet the admission control requirements of the NGN for the multicast service, and provide the user with resource guarantee. service.
  • the present invention provides a next-generation network multicast service admission control method, in which a user-initiated multicast service registration request is successfully registered at an application layer or a service control layer network element, and is applied to an application layer or a service control layer network. After the element sends a multicast service access request, the method includes the following steps:
  • A The application layer or the service control layer network element sends a resource reservation request to the RACF according to the multicast service access request.
  • the RACF pushes the multicast group resource information to a transport layer network element that processes the multicast group join request of the user.
  • the RACF performs resource authorization and reservation according to the network transmission configuration information, the network resource information, and the local multicast service policy of the user.
  • step B further includes the following steps:
  • the RACF sends a resource reservation success message to the application layer or the service control layer network element;
  • the application layer or the service control layer network element After receiving the resource reservation success message, the application layer or the service control layer network element sends a service request success message to the user.
  • step C is performed simultaneously with step C1, or between step B and step C1; after step C2, the following steps are further included:
  • D1 The user sends a multicast group join request to the transport layer network element
  • the transport layer network element opens a corresponding multicast service gating according to the multicast group resource information of the user.
  • step C2 and step C further include the following steps:
  • D2 The user sends a multicast group join request to the transport layer network element
  • the transport layer network element sends the foregoing multicast group join request to the RACF;
  • Step C also includes the following steps:
  • the transport layer network element opens a corresponding multicast service gating according to the multicast group resource information of the user.
  • the multicast service access request carries the transport layer user identifier and the service identifier of the user.
  • the resource authorization performed by the RACF specifically includes the following sub-steps:
  • the PD-FE in the RACF determines the transport layer QoS configuration subscribed by the user according to the transport layer user identifier and the user network transmission configuration information acquired from the NACF;
  • B2 The PD-FE queries the local multicast service policy according to the foregoing service identifier, and determines the resources required for the multicast service request.
  • B3 The PD-FE makes a final decision according to the transport layer QoS configuration signed by the user, the resource required by the multicast service request, and the network resource information obtained from the TRC-FE in the RACF, to determine whether to accept the resource pre- Leave the request.
  • the transport layer network element converts the multicast group resource information of the user into a corresponding user access control list, and opens a corresponding multicast service gating according to the user access control list.
  • the user sends the multicast group join request by using an IGMP or MLD protocol;
  • the transport layer network element is an access node or an edge node of the transport layer determined by the IGMP or the MLD protocol.
  • the admission control method for the multicast service in the NGN architecture implements the admission control requirement of the NGN for the multicast service, and ensures that the service layer and the transport layer are separated from each other, and only the RACF is performed.
  • the corresponding multicast service extension has little impact on the service layer and the transport layer, and is suitable for promoting multicast services under the NGN architecture.
  • FIG. 1 is a schematic diagram of an NGN architecture defined by an ITU-T in the prior art
  • FIG. 2 is a schematic diagram of an NGN RACF functional architecture defined by the ITU-T in the prior art
  • FIG. 3 is a schematic diagram of a RACF-based multicast service admission control network architecture according to an embodiment of the present invention
  • FIG. 4 is a RACF-based multicast according to an embodiment of the present invention
  • Business acceptance control business flow chart
  • the resource admission control function in the NGN is a medium for service control and network transmission.
  • Resource access control can provide resource-guaranteed services for multicast applications lacking operational control according to the resource status, network policy, and service nature of the network.
  • the service process of the multicast service is compatible with the original NGN service.
  • the user registers with the NGN network through the service control layer or the application layer of the original NGN.
  • the service control layer or application layer of the network is contracted according to the user.
  • the information authenticates the user to the multicast service.
  • Multicast service The subscription information includes: a service layer user identifier, a user-signed service identifier, a transport layer user identifier, and other information.
  • the network sends the service-related configuration information to the user, so that the user can obtain the authorized multicast service information.
  • the user selects a specific multicast service through the multicast service information to initiate an access request for the specific multicast service.
  • the application layer or the service control layer receives the multicast service access request from the user, the request cannot be performed at the service level.
  • the request needs to be forwarded to the RACF.
  • the RACF determines whether the transport layer has the resources required by the service to determine whether the user multicast service access request is confirmed.
  • the multicast service access request (that is, the multicast service request) received by the PD-FE in the RACF carries the transport layer user identifier and the service identifier information.
  • the PD-FE determines the QoS (Quality of Service) configuration of the transport layer subscribed by the user according to the transport layer user identifier and the user network transmission configuration information acquired from the NACF; and then, the PD-FE is based on the service.
  • the identifier is used to query the local multicast service policy, and the resources required for the multicast service request are determined, including a group of multicast group addresses and other service policies.
  • the PD-FE is configured according to the transport layer QoS configuration of the user subscription and the multicast service request.
  • the required resources and the topology resource information (also referred to as network resource information) obtained from the TRC-FE make a final decision to determine whether to authorize the user's service resource request. If the request is authorized to pass, the user multicast group resource information corresponding to the user service request is recorded in a local database (user management database) in the transmission resource control function unit of the RACF, and then the multicast group resource information of the user may be The policy implementation is delivered to the transport layer network node.
  • the embodiment of the present invention provides a method for implementing multicast group admission control on a multicast service by the RACF under the NGN system architecture, provided that the multicast service is a point-to-multipoint multicast service in the ITU-T NGN framework.
  • FIG. 3 is a schematic diagram of a RACF-based multicast service admission control network architecture according to the present invention
  • FIG. 4 is a flowchart of a RACF-based multicast service admission control service according to an embodiment of the present invention.
  • the present invention will be described in detail with reference to FIG. 3 and FIG. 4 how the present invention provides resource-guaranteed services for a multicast application lacking operational control through RACF.
  • the business process of the embodiment of the present invention shown in FIG. 4 includes the following steps:
  • Step 401 The user terminal sends a network attach request to the network attach control function to attach to the network.
  • the network attachment control function performs IP configuration and service access parameter configuration on the user terminal.
  • Step 402 The user terminal initiates a multicast service registration request to the multicast application server (refer to FIG. 3, also referred to as a multicast service server).
  • the multicast application server also referred to as a multicast service server.
  • the user terminal may send a multicast service registration request to the multicast application server at the service level through HTTP (HyperText Transfer Protocol), or may use a SIP (Session Initial Protocol) group.
  • the broadcast service registration request is forwarded to the multicast application server via the NGN function entity of the service control layer.
  • Step 403 The multicast application server forwards the multicast service registration request to the service authentication authorization function unit of the service control layer to initiate a service authentication request, and the service authentication authorization function unit stores the corresponding user according to the service user configuration function unit of the service control layer.
  • the service subscription information is used to perform the multicast service authentication for the service registration request; or the NGN function entity of the service control layer receives the multicast service registration request initiated by the user terminal through the SIP protocol, and after the service control layer completes the authentication, forwards the message to the multicast application.
  • the service subscription information includes a transport layer user identifier and a subscription service identifier.
  • Step 404 After the service authentication is passed, the multicast application server receives the multicast service registration success message.
  • Step 405 The multicast application server forwards the service registration success message to the user terminal, and the user terminal learns that the service registration authentication is successful, and obtains specific multicast application server information (included in the multicast service information);
  • Step 406 The user terminal sends a multicast service access request message to the corresponding multicast application server according to the obtained multicast application server information, to request a corresponding multicast service.
  • Step 407 The multicast application server does not make a decision on the request locally, but sends a resource reservation request message including a resource authorization request to the RACF to request the RACF to perform resource authorization and resource reservation operations.
  • Step 408 After receiving the resource reservation request, the RACF combines the user network transmission configuration information provided by the NACF, the network resource information provided by the TRC-FE, and the local multicast service policy (ie, the access network policy, for example, the access network). Whether to allow multicast services, and the maximum allowed bandwidth, etc. for resource authorization; if the authorization is determined to accept the request, the resource reservation is performed and the user's group is added to the user management database for the multicast group admission control in the RACF. Broadcasting resource information; Finally, the RACF returns a resource reservation success message to the multicast application server in response to the service layer request;
  • the user multicast resource management unit in FIG. 3 is used to store network resource information related to a service request authorized by the user layer, because the information that the user subscribes to the network provider is the sum of the unicast service and the multicast service.
  • the RACF for resource admission control needs to distinguish the specific resource usage of the user.
  • Step 409 The multicast application server returns a service request success message to the user terminal.
  • Step 410 The user terminal sends an IGMP/MLD corresponding to the service to the transport layer network element (Internet Group Management Protocol/Multicast Listener Discovery, Internet Group Management Protocol/Multicast) The multicast discovery group joins the request. If the multicast group resource information of the user is not pushed to the transport layer network node, the transport layer sends the multicast group join request to the multicast group resource admission control located in the PD-FE. After the decision is passed, the PD-FE sends the multicast group resource information of the user to the PE-FE (Policy Enforcement Functional Entity) in the transport layer, which is converted into a user by the PE-FE. After accessing the control list, the transport layer opens the multicast service gating according to the user access control list, and the user can receive the multicast service data stream.
  • the transport layer network element Internet Group Management Protocol/Multicast Listener Discovery, Internet Group Management Protocol/Multicast
  • the transport layer network element is an access node or an edge node of the transport layer determined by the IGMP/MLD protocol for processing the multicast group join request sent by the user terminal.
  • the multicast application server may also select another authentication mode to complete the authentication of the user multicast service registration request, that is, the service layer is authenticated by the service layer of the application layer independently of the service control layer. .
  • the above embodiment has various transformations, such as:
  • the RACF receives the resource reservation sent by the multicast application server.
  • the corresponding user multicast group resource information is pushed to the access node or the edge node of the transport layer determined by the IGMP/MLD protocol, and converted by the access node or the edge node of the transport layer to the corresponding user.
  • Access control list ;
  • step 410 after receiving the IGMP/MLD multicast group join request sent by the user terminal, the access node or the edge node of the transport layer does not need to send the request to the PD-FE, and may directly
  • the multicast service gating is enabled according to the access control list of the corresponding user, so that the user starts to receive the multicast service data flow.
  • the admission control method for the multicast service in the NGN architecture implements the admission control requirement of the NGN for the multicast service, and ensures that the service layer and the transport layer are separated from each other, and only the corresponding multicast is performed on the RACF.
  • the service expansion has a small impact on the service layer and the transport layer, and is suitable for promoting the multicast service under the NGN architecture.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé pour réaliser un contrôle d'admission de service de multidiffusion en NGN, quand une demande d'enregistrement de service de multidiffusion effectuée par un utilisateur est enregistrée avec succès sur un élément de réseau dans une couche d'application ou une couche de contrôle de service. Une demande d'accès de service de multidiffusion est ensuite envoyée à l'élément de réseau dans la couche d'application ou la couche de contrôle de service et le procédé comprend alors les étapes suivantes : l'élément de réseau dans la couche d'application ou la couche de contrôle de service envoie une demande de réservation de ressource à un RACF selon la demande d'accès de service de multidiffusion ; après la réception de la demande de réservation de ressource, le RACF réalise l'autorisation et la réservation de la ressource, et génère les informations de ressource du groupe de multidiffusion pour l'utilisateur ; le RACF pousse les informations de ressource du groupe de multidiffusion jusqu'à l'élément de réseau de couche de transport qui traite la demande pour la jonction dans le groupe de multidiffusion pour l'utilisateur. En appliquant le procédé selon la présente invention, le besoin de contrôle d'admission pour le service de multidiffusion dans le NGN est réalisé, et la séparation mutuelle entre la couche de service et la couche de transport est assurée, une extension de service de multidiffusion correspondante est seulement réalisée pour le RACF, l'influence vis-à-vis de la couche de service et de la couche de transport est réduite, et le service de multidiffusion est adapté pour être étendu dans la structure du NGN.
PCT/CN2008/070687 2008-01-30 2008-04-09 Procédé pour réaliser un contrôle d'admission de service de multidiffusion en ngn WO2009100623A1 (fr)

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CN200810004777.XA CN101227309B (zh) 2008-01-30 2008-01-30 下一代网络组播业务接纳控制方法
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WO2019071472A1 (fr) * 2017-10-11 2019-04-18 华为技术有限公司 Procédé et appareil de création de politique de service
CN112187644B (zh) * 2020-10-28 2022-02-22 郑州芯兰德网络科技有限公司 一种基于标识解析路由的组播系统及组播方法

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