WO2009094923A1 - Procédé et système de mise en oeuvre pour transmettre un service dans un réseau de génération suivante - Google Patents

Procédé et système de mise en oeuvre pour transmettre un service dans un réseau de génération suivante Download PDF

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Publication number
WO2009094923A1
WO2009094923A1 PCT/CN2009/070164 CN2009070164W WO2009094923A1 WO 2009094923 A1 WO2009094923 A1 WO 2009094923A1 CN 2009070164 W CN2009070164 W CN 2009070164W WO 2009094923 A1 WO2009094923 A1 WO 2009094923A1
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WIPO (PCT)
Prior art keywords
path
service
pce
label switching
transport network
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PCT/CN2009/070164
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English (en)
Chinese (zh)
Inventor
Jixiong Dong
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009094923A1 publication Critical patent/WO2009094923A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and system for implementing a service in a Next Generation Network (NGN).
  • NTN Next Generation Network
  • the transport network referred to in the embodiment of the present invention is a narrow transport network, which is included in the transport stratum of the NGN, mainly adopts Synchronous Digital Hierarchy (SDH), and wavelength division multiplexing (WDM). Wavelength Division Multiplexing), Optical Transport Network (OTN,
  • PBB-TE carrier backbone bridge - traffic engineering
  • T-MPLS multi-protocol label switching path transport network
  • L1VPN Layer 1 Virtual Private Network
  • L2VPN Layer 2 Virtual Private Network
  • BOD Layer 2 Virtual Private Network
  • BOD BOD and other services, not the services of terminal-oriented individual users (such as VOIP, etc.).
  • the existing NGN system protocols and interfaces support the transport network very limited, especially under the control of the Generalized Multi-Protocol Label Switch (GMPLS) and the Path Computation Element (PCE). Delivery network.
  • GPLS Generalized Multi-Protocol Label Switch
  • PCE Path Computation Element
  • the inventors found that the currently defined NGN protocol has the following problems in supporting the control and management of the transport network:
  • the existing NGN protocol only supports MPLS LSP, partially supports Ethernet, does not support SDH path connection, and does not support PBB-TE/PBT path connection.
  • the resource and admission control subsystem (RACS, Resource and Admission Control Subsystem) implements transmission. The same problem exists in the business. Summary of the invention
  • Embodiments of the present invention provide a method and system for implementing a service in an NGN network, incorporating the function of the transport network into the NGN network, constructing a highly available transport network in the NGN network, and unifying the service operation system.
  • the transmission resource control function entity TRC-FE of the NGN network controlled by the RACF cooperates with the PCE/GMPLS to perform centralized management and control of the transport network service, and instructs the operator equipment to establish a label switching path for the transport network service;
  • the management controls and transmits the service.
  • the embodiment of the present invention further provides an implementation method for transmitting a service in a RACS controlled NGN network, including:
  • PCE/GMPLS into the RACS-controlled NGN network to implement RACS management and control of the transport network;
  • the access resource and the admission control function A-RACF of the RACS-controlled NGN network work in cooperation with the PCE/GMPLS to centrally manage and control the transport network service, and instruct the operator equipment to establish a label switching path for the transport network service;
  • an embodiment of the present invention further provides an implementation system for transmitting a service in a RACF-controlled NGN network, where the PCE/GMPLS is included in the RACF-controlled NGN network, including: a transmission resource control function entity TRC-FE And working together with the PCE/GMPLS to perform centralized management and control on the transport network service, and establish a label switching path of the transport network service;
  • a transmission resource control function entity TRC-FE And working together with the PCE/GMPLS to perform centralized management and control on the transport network service, and establish a label switching path of the transport network service;
  • a policy decision function entity PD-FE configured to manage and control the service after the label switching path is established
  • a path calculation unit PCE configured to establish a label switching path calculation path for the transport network service, and provide path information
  • the universal multi-protocol label switching module GMPLS is configured to cooperate with the TRC-FE and the PCE to manage and control the transport network service and establish a label switching path for the transport network.
  • the embodiment of the present invention further provides an implementation system for transmitting a service in a RACS-controlled NGN network, where the PCG/GMPLS is included in the NGN network controlled by the RACS, including:
  • An access resource and admission control function A-RACF configured to work in cooperation with the PCE/GMPLS, centrally manage and control the transport network service, and establish a label switching path of the transport network service; establish the label switching path Afterwards, the management controls and transmits the business;
  • a path calculation unit PCE configured to manage and control the transport network service, and establish a label switching path calculation path for the transport network service, and provide path information;
  • the universal multi-protocol label switching module GMPLS is configured to cooperate with the A-RACF and the PCE to manage and control the transport network service, and establish a label switching path for the transport network.
  • the PCE/GMPLS of the transport network is included in the NGN network, and the PCE/GMPLS cooperates with the resource control function entity in the NGN network to perform centralized management and control on the transport network service, and establishes a label switching path to transmit the service;
  • a highly available transport network is built in the NGN network to unify the business operation system.
  • DRAWINGS Figure 1 is a schematic view of a conventional NGN structure
  • FIG. 2 is a schematic flowchart of a first embodiment of an implementation method for transmitting a service in an RACF controlled NGN network according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a second embodiment of an implementation method for transmitting a service in an RACF controlled NGN network according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a third embodiment of an implementation method for transmitting a service in an RACF controlled NGN network according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an implementation system for transmitting a service in an RAGN controlled NGN network according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a first embodiment of an implementation method for transmitting a service in a RACS controlled NGN network according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a second embodiment of an implementation method for transmitting a service in a RACS controlled NGN network according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of a third embodiment of an implementation method for transmitting a service in a RACS controlled NGN network according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of an implementation system for transmitting a service in a RACS controlled NGN network according to an embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a method and system for implementing a service in an NGN network, incorporating the function of the transport network into the NGN network, constructing a highly available transport network in the NGN network, and unifying the service operation system.
  • FIG. 2 is a schematic flowchart diagram of a first embodiment of a method for implementing a service in an RACF controlled NGN network according to an embodiment of the present invention.
  • step 100 PCE/GMPLS is included in the RACF controlled NGN network to implement RACF management and control of the transport network;
  • a Transport Resource Control Function Entity receives a request for allocating resources for a transport network service from a Policy Decision Function Entity (PD-FE);
  • the TRC-FE analyzes between the carrier edge devices that the transport network traffic passes through. Whether the label switching path is established;
  • step 103 if the label switching path has been established, it is determined whether it meets the resource requirement of the transport network service;
  • step 104 if the established label switching path does not satisfy the resource requirement of the transport network service or the label switching path is not established, the TRC-FE initiates a path calculation request to the PCE to select the transport network service to pass through the operator.
  • the label switching path between the edge devices optionally, if the label switching path satisfies the resource requirements of the transport network service, the established label switching path is used to manage and control the transport network service.
  • the TRC-FE receives the path calculation result from the PCE, and obtains the path information.
  • the path information herein may be all path information or part of the path information.
  • the corresponding resource information is obtained according to the transport network type managed by the TRC-FE.
  • the TRC-FE initiates a command to the carrier equipment to establish a label switching path, or uses the PD-FE to the carrier equipment.
  • the command is initiated to establish a label switching path, where the command carries resource information, including: a service identifier, a source carrier edge device, a destination carrier edge device, and/or path information, a label, a network QOS parameter, and a protection relationship. , priority and other parameters;
  • the path information is returned to the TRC-FE.
  • the TRC-FE carries the path information in the command, and directly sends the information to the operator equipment, or The PD-FE is sent to the carrier device.
  • the specific processing procedure is as follows: After receiving the resource request of the PD-FE, the TRC-FE initiates a path calculation request (including a service identifier) to the PCE. After the PCE is calculated, all the path information is returned. After receiving the path information, the TRC-FE directly initiates a label switching path establishment command to the operator equipment, or initiates a label switching path establishment command to the operator equipment through the PD-FE, where the path information is included in the command;
  • the source operator edge device After receiving the label switching path establishment command, the source operator edge device initiates label switching path signaling between the operator edge devices to the destination carrier edge device.
  • PCE/GMPLS of the transport network PCE/GMPLS works in conjunction with the resource control function entity in the NGN network to centrally manage and control the transport network services, and establish a label switched path to carry transport network services;
  • the transport network for availability unifies the business operations system.
  • FIG. 3 is a schematic flowchart diagram of a second implementation manner of a method for transmitting a service in an RAGN-controlled NGN network according to an embodiment of the present invention.
  • step 200 PCE/GMPLS of the transport network is included in the RAGN controlled NGN network to implement management and control of the transport network by the RACF controlled NGN network;
  • the TRC-FE receives a request for allocating resources for the transport network service from the PD-FE; in step 202, the TRC-FE analyzes whether the label switching path between the operator edge devices that the transport network service passes through is established;
  • step 203 if the label switching path has been established, it is determined whether it meets the resource requirements of the transport network service; if yes, then proceeds to step 210, and if not, proceeds to step 204;
  • step 204 if the established label switching path does not satisfy the resource requirement of the transport network service or the label switching path is not established, the TRC-FE initiates a path calculation request to the PCE to select the transport network service to pass through the operator. Label switching path between edge devices;
  • the TRC-FE carries the path information in the command, and directly sends the path information to the carrier device, or The PD-FE is sent to the carrier device.
  • the specific processing procedure is as follows: After receiving the resource request of the PD-FE, the TRC-FE initiates a path calculation request (including a service identifier) to the PCE. After the PCE is calculated, all the path information is returned. After receiving the path information, the TRC-FE directly initiates a label switching path establishment command to the operator equipment, or initiates a label switching path establishment command to the operator equipment through the PD-FE, where the path information is included in the command;
  • the TRC-FE does not carry the path information in the command in step 207; the specific processing flow is: TRC-FE
  • a path calculation request (including the service identifier) is initiated.
  • the path information is not returned, but the TRC-FE is notified whether the available path is available.
  • the label switching path establishment command is initiated to the operator equipment, or the label switching path establishment command is initiated to the operator equipment by using the PD-FE, and the path information is not included in the command.
  • the operator equipment initiates a path calculation request to the PCE, and the PCE returns detailed path information according to the service identifier.
  • the source operator edge device After receiving the label switching path establishment command, the source operator edge device initiates establishment of label switching path signaling between the operator edge devices to the destination operator edge device.
  • step 209 a label switching path between the source operator edge device and the destination carrier edge device is established according to the resource information and the path information carried in the command.
  • the TRC-FE directly sends a command to establish a tributary/pseudo-line channel to the operator edge device, or the TRC-FE feeds back the resource status to the PD-FE, and then the PD-FE sends the tributary/pseudo-line channel.
  • the operator edge device the TRC-FE feeds back the resource status to the PD-FE, and then the PD-FE sends the tributary/pseudo-line channel.
  • An implementation method for transmitting a service in a RACF controlled NGN network provided by an embodiment of the present invention Incorporating PCE/GMPLS, PCE/GMPLS and the transport network in the RACF-controlled NGN network
  • the resource control function entities in the NGN network work together to centrally manage and control the transport network services, and implement the PD-FE management of the transport network services by binding the branch/pseudo-line channel label switching paths. Control and unify the business operation system.
  • FIG. 4 is a schematic flowchart diagram of a third embodiment of a method for implementing a service in an RACF controlled NGN network according to an embodiment of the present invention.
  • step 300 PCE/GMPLS of the transport network is included in the RAGN-controlled NGN network to implement management and control of the transport network by the RACF-controlled NGN network;
  • the TRC-FE receives a request for allocating resources for the transport network service from the PD-FE.
  • the TRC-FE analyzes whether the label switching path between the operator edge devices through which the NGN service passes is established.
  • step 303 if the label switching path has been established, it is determined whether it meets the resource requirement of the transport network service;
  • the TRC-FE initiates a path calculation request to the PCE to select the transport network service to pass through the operator.
  • the label switching path between the edge devices optionally, the established label switching path satisfies the resource requirements of the transport network service, and the TRC-FE directly sends a command to establish the branch/pseudo line channel to the operator edge device, or TRC -
  • the FE feeds back the resource to the PD-FE, and the PD-FE sends a command to establish the tributary/pseudo-line channel to the operator edge device; the carrier edge device associates the branch/pseudo-line channel corresponding to the service identifier with
  • the label switching path corresponding to the service identifier is bound to implement management and control of the PD-FE.
  • the TRC-FE receives the path calculation result from the PCE, and obtains the path information.
  • the path information herein may be all path information, or may be part of the path information, in step 306, according to the The transport network type managed by the TRC-FE obtains the corresponding resource information.
  • the TRC-FE directly sends a command to the operator edge device or the PD-FE to the carrier edge device to establish a label switching path.
  • the resource information includes: a service identifier, a source carrier edge device, a destination carrier edge device, and/or path information, a label, a network QOS parameter, a protection relationship, a priority, and the like;
  • the TRC-FE carries the path information in the command, and directly sends the path information to the carrier device, or
  • the specific processing procedure for the PD-FE to send the command to the carrier device is as follows: After receiving the resource request of the PD-FE, the TRC-FE initiates a path calculation request (including a service identifier) to the PCE, and after the PCE is calculated, returns all the The path information, after receiving the path information, the TRC-FE directly initiates a label switching path establishment command to the operator equipment, or initiates a label switching path establishment command to the operator equipment through the PD-FE, where the path information is included in the command;
  • the TRC-FE does not carry the path information in the command in step 307.
  • the specific processing flow is: TRC-FE After the resource request of the PD-FE is sent, the path calculation request (including the service identifier) is sent to the PCE. After the PCE is calculated, the path information is not returned, but the TRC-FE is notified whether the available path is available. After the affirmative information is obtained, the label switching path establishment command is directly sent to the operator, or the label switching path establishment command is initiated to the operator equipment through the PD-FE, and the path information is not included in the command. After receiving the command, the operator equipment initiates a path calculation request to the PCE, and the PCE returns detailed path information according to the service identifier.
  • step 308 it is determined whether the devices on the path passed support the universal multi-protocol label exchange protocol, and if so, proceeds to step 309; if not, proceeds to step 310;
  • step 309 the TRC-FE initiates a label switching path establishment command directly to the carrier edge device or the PD-FE to the carrier device.
  • the following procedure is the same as that of the first embodiment and the second embodiment, and the description is not repeated here. ;
  • the TRC-FE sends a label switching path establishment command to all the carrier intermediate devices and the edge device that the label switching path passes through the PD-FE; the command carries the resource information;
  • the operator intermediate device After receiving the command, the operator intermediate device configures a node label switching table according to the resource information carried by the carrier, establishes a pseudowire, configures a virtual connection group and a flow filtering table, and binds the two; 312. Establish a label switching path for the transport network service according to the node label switching table and the path information.
  • the TRC-FE feeds back the resource status to the PD-FE, and the PD-FE manages and transmits the transport network service.
  • the method for implementing the transmission service in the RACF-controlled NGN network works by integrating the PCE/GMPLS of the transport network in the RACF-controlled NGN network, and the PCE/GMPLS works in cooperation with the resource control function entity in the NGN network. Centralized management and control of the transport network service, and establishment of a pseudowire channel through the intermediary device of the carrier, and binding with the label switching path, realizing the management and control of the transport network service, and unifying the service operation system.
  • FIG. 5 is a schematic structural diagram of an implementation system for transmitting a service in an RACF-controlled NGN network according to an embodiment of the present invention.
  • the user CE1 initiates a service request by using PORTAL, SIP signaling, etc.; after receiving the request, the service control entity SCF accepts the service according to the local user subscription data and policy analysis;
  • the SCF accepts the service, it initiates a service request to the peer user. After receiving the request, the peer user CE2 determines whether to accept the service according to local information and policies.
  • the peer user CE2 responds to the service request.
  • the PD-FE After receiving the service request, the PD-FE initiates a resource request to the TRC-FE. After receiving the resource request, the TRC-FE analyzes whether the TUNNEL LSP between the carrier edge devices (PEs, Provider Edges) that the service passes through has been established. If it has been established, it is judged whether the resource requirement is met;
  • PEs Provider Edges
  • the parameters carried by the command are the service identifier, the destination PE address, the network QOS parameter, the priority, and the protection relationship. Wait. If the transport network element does not have a GMPLS control protocol, then all intermediate Ps that the path passes through are also required.
  • the node initiates a TUNNEL connection establishment command, and the command parameters are: target P node address, ingress port number, ingress label, egress port number, outgoing label, network QOS parameter, etc., where the label is a generalized label, in the T-MPLS layer network. , is the LSP label; in the SDH network, it is the VC12/VC3/VC4 slot label; in the optical cross-network, it is the wavelength label; in the PBB-TE/PBT network, it is the VLAN+MAC label.
  • the PE GMPLS control module After receiving the TUNNEL LSP establishment command, the PE GMPLS control module initiates the establishment of the TUNNEL LSP signaling between the PEs to establish the TUNNEL LSP of the PE-PE. After receiving the tributary/PW channel establishment command, the PW is established. Configure the VCG and the service flow and bind the two. After receiving the TUNNEL connection establishment command, the P node configures the node label exchange table according to the command parameters.
  • the TRC-FE performs a resource request response to the PD-FE according to the existing resource situation or the newly created resource result;
  • the PD-FE After receiving the resource request response, the PD-FE determines the parameters such as the network QOS according to the local policy, and issues the gating open and close command and the QOS parameter and the service identifier according to the content of the service request.
  • the PE node After receiving the gating command, the PE node binds the tributary/PW channel corresponding to the service identifier to the TUNNEL LSP corresponding to the service identifier.
  • the user service traffic can be transmitted on the transmission resource; the so-called service flow is different from the original user IP flow under the NGN (identified by the quintuple: source address, Source port number, destination address, destination port number, protocol number).
  • the stream here is a transparent transport stream for user traffic, such as port flow, port + VLAN flow. In this way, there is no need to perceive the actual traffic data of the user.
  • the so-called TUNNEL LSP can be a VC12/VC3/VC4 connection between PE line interfaces, a B-VLAN+D-MAC connection, or a T-MPLS LSP.
  • the so-called line-to-line connection can be a VC4/VC3/VC12 cross-connection (SDH) between the optical line interface boards in the east and west directions on the P node, or a label switching connection (such as VLAN+MAC exchange) on the P node. Or T-MPLS TUNNEL label switching), or wavelength switching.
  • the so-called tributary / PW may be a PDH tributary interface (such as one or more 2M interfaces on an SDH/MSTP device), or an interface such as ATM/ETH and map its package to the VCG, or An AC interface is mapped to the PW (defined in the IETF PWE3 working group).
  • the PW can be carried in T-MPLS.
  • branch/PW is bound to the TUNNEL LSP, which means that the PDH tributary interface is cross-connected to some VC4/VC3/VC12 on the line, or the VCG where the interface such as ATM/ETH is connected is connected to the line.
  • the existing interface of PCE can be used.
  • FIG. 6 is a schematic flowchart diagram of a first embodiment of a method for implementing a service in a RACS controlled NGN network according to an embodiment of the present invention.
  • step 400 the PCE/GMPLS of the transport network is included in the NGN network controlled by the RACS to implement management and control of the transport network by the RACS network;
  • the A-RACF analyzes whether a label switching path between the carrier edge devices through which the transport network service passes is established;
  • step 403 if the label switching path has been established, it is determined whether it meets the resource requirement of the transport network service; In step 404, if the established label switching path does not satisfy the resource requirement of the transport network service or the label switching path is not established, the A-RACF initiates a path calculation request to the PCE to select the transport network service to pass through the operator.
  • the label switching path between the edge devices optionally, when the established label switching path satisfies the resource requirements of the transport network service, the established label switching path is used to manage and transmit the transport network service.
  • the A-RACF receives the path calculation result from the PCE, and obtains the path information.
  • the path information herein may be all path information or part of the path information;
  • the corresponding resource information is obtained according to the transport network type managed by the A-RACF.
  • the A-RACF initiates a command to the operator edge device to establish a label switching path, or initiates to the carrier device through the SPDF.
  • the command is used to establish a label switching path, where the command carries resource information, including: a service identifier, a source carrier edge device, a destination carrier edge device, and/or path information, a label, a network QOS parameter, a protection relationship, Priority and other parameters;
  • the A-RACF carries the path information in the command and sends it to the operator equipment, or sends the message through the SPDF.
  • the specific processing procedure is as follows: After receiving the resource request of the SPDF, the A-RACF initiates a path calculation request (including the service identifier) to the PCE. After the PCE is calculated, all the path information is returned, and the A-RACF receives the path. After the information is sent, the label switching path establishment command is directly sent to the operator equipment or the label switching path establishment command is initiated by using the SPDF, and the path information is included in the command;
  • step 407 the A-RACF does not carry the path information in the command; the specific processing flow is: A-RACF
  • the path calculation request (including the service identifier) is initiated to the PCE.
  • the path information is not returned, but the A-RACF is told whether there is an available path.
  • the A-RACF receives the affirmation After the information, a label switching path establishment command is initiated to the operator equipment, or a label switching path establishment command is initiated to the operator equipment through the SPDF, and the path information is not included in the command.
  • the operator equipment After receiving the command, the operator equipment initiates a path calculation request to the PCE, and the PCE returns detailed path information according to the service identifier.
  • the source operator edge device After receiving the label switching path establishment command, the source operator edge device initiates establishment of label switching path signaling between the operator edge devices to the destination operator edge device.
  • step 500 PCE/GMPLS is included in the NGN network controlled by the RACS to implement management and control of the transport network by the RACS network;
  • step 503 if the label switching path has been established, it is determined whether it meets the resource requirement for transmitting the RACS service; if yes, then proceeds to step 510, and if not, proceeds to step 504;
  • the A-RACF initiates a path computation request to the PCE to select a label exchange between the carrier edge devices of the RACS service if the resource requirements for transmitting the RACS service are not met or the label switched path is not established.
  • the A-RACF receives the path calculation result from the PCE, and obtains the path information.
  • the path information herein may be all path information or part of the path information.
  • the corresponding resource information is obtained according to the transport network type managed by the A-RACF.
  • the A-RACF directly sends a command to the operator edge device to establish a label switching path, or to the operator edge through the SPDF.
  • the device initiates a command to establish a label switching path, where the command carries resource information, including: a service identifier, a source carrier edge device, a destination carrier edge device, and/or routing information, a label, a network QOS parameter, and a protection. Relationship, priority, etc. It should be noted that, in this step, whether the path information is carried in the command needs to be determined according to whether the PCE returns all the path information to the A-RACF in step 505;
  • the A-RACF carries the path information in the command, and directly sends the path information to the carrier device, or The SPDF sends the command to the operator equipment.
  • the specific processing procedure is as follows: After receiving the resource request of the SPDF, the A-RACF initiates a path calculation request (including the service identifier) to the PCE. After the PCE is calculated, all the path information is returned. After receiving the path information, the A-RACF directly initiates a label switching path establishment command to the operator equipment or initiates a label switching path establishment command to the operator equipment through the SPDF, where the path information is included in the command;
  • step 505 the PCE calculates the path and returns only part of the path information to the A-RACF
  • step 507 the A-RACF does not carry the path information in the command; the specific processing flow is: A-RACF
  • the path calculation request (including the service identifier) is initiated to the PCE.
  • the path information is not returned, but the A-RACF is told whether there is an available path.
  • the A-RACF receives the affirmation After the information is sent, the label switching path establishment command is directly sent to the operator equipment or the label switching path establishment command is initiated to the operator equipment through the SPDF, and the path information is not included in the command.
  • the operator equipment initiates a path calculation request to the PCE, and the PCE returns detailed path information according to the service identifier.
  • the source operator edge device After receiving the label switching path establishment command, the source operator edge device initiates label switching path signaling between the operator edge devices to the destination carrier edge device.
  • step 509 a label switching path between the source operator edge device and the destination carrier edge device is established according to the resource information and the path information carried in the command.
  • step 510 the A-RACF directly sends a command to establish a tributary/pseudo-line channel to the operator edge device, or the A-RACF feeds back resources to the SPDF to obtain information, and then the SPDF sends a command to establish a tributary/pseudo-line channel.
  • the operator's edge equipment To the operator's edge equipment;
  • the operator edge device binds the branch/pseudo-line channel corresponding to the service identifier with the label switching path corresponding to the service identifier, so as to implement management and control of the service by the SPDF.
  • the method for implementing the transmission service in the RACS-controlled NGN network works by integrating the PCE/GMPLS of the transport network in the NGS network controlled by the RACS, and the PCE/GMPLS works in cooperation with the resource control function entity in the NGN network.
  • Centralized management and control of the transport network service, and the PD-FE pair transport network is realized by binding the branch/pseudo-line channel label switching path.
  • the management and control of the business unifies the business operation system.
  • step 600 PCE/GMPLS is included in the NGN network controlled by the RACS to implement management and control of the transport network by the NGN network controlled by the RACS;
  • step 601 the A-RACF receives a request for allocating resources for the transport network service from the SPDF; in step 602, the A-RACF analyzes whether the label switching path between the operator edge devices through which the transport network service passes is established;
  • step 604 if the established label switching path does not satisfy the resource requirement of the transport network service or the label switching path is not established, the A-RACF initiates a path calculation request to the PCE to select the transport network service to pass through the operator. Label switching path between edge devices; optionally, if the established label switching path satisfies the resource requirements of the transport network service, the ⁇ -RACF directly sends a command to establish a tributary/pseudo-line channel to the operator edge device.
  • the A-RACF feeds back the resource to the SPDF, and then the SPDF sends a command to establish the tributary/pseudo-line channel to the operator edge device; the operator edge device associates the branch/pseudo-line channel corresponding to the service identifier with the The label switching path corresponding to the service identifier is bound to implement SPDF management and control of the service.
  • step 605 the A-RACF receives the path calculation result from the PCE, and obtains the path information.
  • the path information herein may be all path information or part of the path information;
  • the corresponding resource information is obtained according to the transport network type managed by the A-RACF.
  • the A-RACF directly sends a command to the operator edge device to establish a label switching path, or to the operator edge through the PSDF.
  • the device initiates a command to establish a label switching path, where the command carries resource information, including: a service identifier, a source carrier edge device, a destination carrier edge device, and/or path information, a label, a network QOS parameter, and a protection. Relationship, priority, etc.
  • the A-RACF carries the path information in the command and directly sends the path information to the carrier device. Or send the command to the operator equipment through SPDF;
  • the specific processing flow is: After receiving the resource request of the SPDF, the A-RACF initiates a path calculation request (including the service identifier) to the PCE, and after the PCE is calculated, returns all the After the path information is received, the A-RACF initiates a label switching path establishment command directly to the operator equipment, or initiates a label switching path establishment command to the operator equipment through the SPDF, where the path information is included in the command;
  • the path calculation request (including the service identifier) is initiated to the PCE. After the PCE is calculated, the path information is not returned, but the A-RACF is told whether there is an available path.
  • the A-RACF receives the affirmation After the information is sent, the label switching path establishment command is directly sent to the carrier device, or the label switching path establishment command is initiated to the operator device through the SPDF, and the path information is not included in the command.
  • the operator equipment initiates a path calculation request to the PCE, and the PCE returns detailed path information according to the service identifier.
  • step 608 it is determined whether the devices on the passed path support the universal multi-protocol label switching protocol, and if so, go to step 609; if not, go to step 610;
  • step 609 the A-RACF directly initiates a label switching path establishment command to the operator edge device or the SDPF to the carrier edge device.
  • the following process is the same as the first embodiment and the second embodiment, and the description is not repeated here. ;
  • step 610 the A-RACF sends a label switching path establishment command to all the carrier intermediate devices and the edge device that the label switching path passes through the SPDF.
  • the command carries the resource information.
  • the operator intermediate device After receiving the command, the operator intermediate device configures a node label switching table according to the resource information carried by the operator, and establishes a pseudowire, configures a virtual connection group and a flow filtering table, and binds the two;
  • a label switching path is established for the transport network service according to the node label switching table and the path information.
  • the method for implementing the transmission service in the RACS-controlled NGN network is implemented by including the PCE/GMPLS, PCE/GMPLS and the transmission network in the RGS-controlled NGN network.
  • the resource control function entities in the NGN network work together to centrally manage and control the transport network services, and establish a pseudowire channel through the carrier intermediate device, and bind to the label switching path to implement the management of the transport network service. Control and unify the business operation system.
  • FIG. 10 is a schematic structural diagram of an implementation system for transmitting a service in a RACS controlled NGN network according to an embodiment of the present invention.
  • the user CE1 initiates a service request by using PORTAL, SIP signaling, etc.; after receiving the request, the service control entity application function (AF, Application Function) accepts the service according to the local user subscription data and policy analysis;
  • AF Application Function
  • the peer user CE2 responds to the service request.
  • the service control entity initiates a service request to the service-based policy decision function (SPDF);
  • the SPDF initiates a resource request to the Access Resource and Admission Control Function (A-RACF, Access-Resource and Admission Control Function).
  • A-RACF Access Resource and Admission Control Function
  • the A-RACF analyzes whether the TUNNEL LSP between the carrier edge devices (PEs, Provider Edges) through which the service passes has been established. If it has been established, it is judged whether the resource requirement is met;
  • the A-RACF initiates a path calculation request to the PCE to select the path of the inter-PE TUNNEL LSP through which the service passes. If service protection is required according to the policy, you need to calculate two paths between the two PEs, namely the working path and the protection path. The PCE then feeds back the calculation results to the A-RACF;
  • the A-RACF also needs the previously established services and policies to determine the B-VLAN and B-MAC of the TUNNEL connection. If the signaling requires an IP address, the A-RACF also converts the path information calculated by the PCE into IP address information. If there is a suitable path, the A-RACF initiates a TUNNEL LSP establishment command to the PE.
  • the parameters carried by the command are: service identifier, source PE node, destination PE node, explicit routing information, B-VLAN+B-MAC label. Information such as the network QOS parameters, the protection relationship, and the priority. Then, the BGP/PW channel establishment command is initiated to the two PEs.
  • the parameters carried by the command are the service identifier, the destination PE address, the network QOS parameter, the priority, and the protection relationship. Wait. If the transport network element does not have the GMPLS control protocol, it is also required to initiate a TUNNEL connection establishment command to all intermediate P nodes through which the path passes.
  • the command parameters are: target P node address, ingress port number, and entry.
  • Label, outbound port number, outgoing label, network QOS parameters, etc. where the label is a generalized label, in the T-MPLS layer network, is the LSP label; in the SDH network, is the VC12/VC3/VC4 time slot label; In the optical cross-network, it is the wavelength label; in the PBB-TE/PBT network, it is the VLAN+MAC label.
  • SPDF responds to business requests
  • the service control entity responds to the service request of the user CE1;
  • the so-called line-to-line connection can be a VC4/VC3/VC12 cross-connection (SDH) between the optical line interface boards in the east and west directions on the P node, or a label switching connection (such as VLAN+MAC exchange) on the P node. Or T-MPLS TUNNEL label switching), or wavelength switching.
  • SDH VC4/VC3/VC12 cross-connection
  • label switching connection such as VLAN+MAC exchange
  • T-MPLS TUNNEL label switching T-MPLS TUNNEL label switching
  • the existing interface of PCE can be used.
  • An implementation method and system for transmitting a service in a RACS-controlled NGN network provided by an embodiment of the present invention, by incorporating PCE/GMPLS in a RACS-controlled NGN network, resource control functions in the NGN network controlled by the PCE/GMPLS and the RACS
  • the entities work together to centrally manage and control the transport network services, and establish a label switched path to transmit the transport network services; construct a highly available transport network in the RACS-controlled NGN network to unify the service operation system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé et un système de mise en oeuvre pour transmettre un service dans un réseau de génération suivante. Le procédé comprend les étapes suivantes: amener PCE/GMPLS dans un réseau NGN commandé par RACF afin que RACF assure la gestion et la commande du réseau de transport; une entité à fonction de commande de ressources de transport TRC-FE du réseau NGN commandé par RACF coopère avec PCE pour mettre en œuvre une gestion et une commande centralisées des services du réseau de transport, et indique à l'équipement du fournisseur d'établir un chemin de commutation d'étiquettes pour les services du réseau de transport; gérer, commander et transmettre les services du réseau de transport après l'établissement du chemin de commutation d'étiquettes.
PCT/CN2009/070164 2008-01-18 2009-01-15 Procédé et système de mise en oeuvre pour transmettre un service dans un réseau de génération suivante WO2009094923A1 (fr)

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US8743686B2 (en) 2008-10-15 2014-06-03 Huawei Technologies Co., Ltd. Method, device, and system for admission control in metropolitan area network
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CN106850435A (zh) * 2016-12-16 2017-06-13 北京格林伟迪科技股份有限公司 一种跨域端到端标签交换路径建立方法和系统
CN111600795B (zh) * 2020-05-26 2023-07-18 新华三信息安全技术有限公司 虚拟边缘设备的建立方法、控制器和服务器

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