WO2016119602A1 - Procédé, système et dispositif de compte rendu de ressources d'un réseau de transport optique - Google Patents

Procédé, système et dispositif de compte rendu de ressources d'un réseau de transport optique Download PDF

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Publication number
WO2016119602A1
WO2016119602A1 PCT/CN2016/071060 CN2016071060W WO2016119602A1 WO 2016119602 A1 WO2016119602 A1 WO 2016119602A1 CN 2016071060 W CN2016071060 W CN 2016071060W WO 2016119602 A1 WO2016119602 A1 WO 2016119602A1
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Prior art keywords
otn
resource information
node
link
network
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PCT/CN2016/071060
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English (en)
Chinese (zh)
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郝鹏
张朝伟
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the present invention relates to the field of communications, and in particular to a method, system and device for reporting resources of an optical transport network (OTN).
  • OTN optical transport network
  • the OTN concept and the overall technical architecture were formally proposed by the International Telecommunication and Standardization Sector (ITU.T) in 1998 as the Plesiochronous Digital Hierarchy (PDH).
  • ITU.T International Telecommunication and Standardization Sector
  • PDH Plesiochronous Digital Hierarchy
  • SDN Software Defined Network
  • the OTN technology includes the complete architecture of the optical layer and the electrical layer. Each layer network has a corresponding management and monitoring mechanism.
  • the optical layer is wavelength switching
  • the electrical layer is time slot switching
  • both the optical layer and the electrical layer have network survivability mechanisms.
  • OTN technology can provide powerful OAM functions and can achieve up to 6 levels of Tandem Connection Monitoring (TCM) functions, providing comprehensive performance and fault monitoring.
  • TCM Tandem Connection Monitoring
  • SDN is a new type of network architecture. Its design philosophy is to separate the control plane of the network from the data forwarding plane and implement programmable control.
  • the SDN network architecture abstraction is usually defined as three layers: the first layer is the forwarding plane entity, including various hardware and software components that implement this forwarding function; the second layer is the entity that manages and controls the first layer forwarding entity, The third layer is based on the applications and services of the first two layers of the underlying network.
  • the interface between the first two layers is called the southbound interface of SDN.
  • the OpenFlow protocol is the mainstream protocol of the southbound interface, which has strong expressive ability and strong adaptability.
  • the OpenFlow protocol is a packet switching technology originally proposed by Stanford University. It is based on the existing Transmission Control Protocol (TCP)/Internet Protocol (IP) technical conditions. Solve the shortcomings of the current network with innovative network interconnection concept.
  • the OpenFlow protocol family does not have a corresponding management and control mechanism, that is, the SDN cannot control the resources under the OTN model, and thus cannot manage and control the OTN service, and the two networks are incompatible with each other.
  • an embodiment of the present invention provides a resource reporting method, system, and apparatus for an OTN.
  • a resource reporting method of an optical transmission network OTN is further provided, where the OTN device adaptation device acquires node resource information and/or link resource information from a network node of the OTN network, where The OTN device adaptation device is located between the network node and a software-defined network SDN controller; the OTN device adaptation device reports the node resource information and/or the link resource information to the SDN control Device.
  • the OTN device adaptation device reporting the node resource information and/or the link resource information to the SDN controller includes: setting, in the configuration information of the OpenFlow protocol, an indication The node resource information and/or the indication information of the link resource information; and the configuration information including the indication information is sent to the SDN controller.
  • setting indication information for indicating the node resource information and/or the link resource information in the configuration information of the OpenFlow protocol includes: adopting a flag bit in the configuration information of the OpenFlow protocol. Assignment to indicate the node resource information and/or the link resource information.
  • the method further includes: when the node resource information and/or the link resource information is changed, the configuration of the changed node resource information and/or the link resource information is carried. The information is sent to the SDN controller.
  • the OTN device adaptation device before the OTN device adaptation device reports the node resource information and/or the link resource information to the SDN controller, the OTN device adaptation device further includes: The SDN controller sends a link request; the OTN device adaptation device establishes a link with the SDN controller under the trigger of the link request.
  • a resource reporting system of an optical transmission network OTN including: a software-defined network SDN controller, a network node of an OTN network, and an OTN device adaptation device, located in the Between the network node and the SDN controller, configured to acquire node resource information and/or link resource information from a network node of the OTN network, and report the node resource information and/or the link resource information to The SDN controller.
  • the OTN device adaptation apparatus is further configured to send a link request to the SDN controller, and establish a link with the SDN controller under the trigger of the link request.
  • a resource reporting apparatus of an optical transmission network OTN is further provided, which is applied to an OTN device adaptation apparatus, and includes: an obtaining module, configured to acquire node resource information from a network node of an OTN network. And/or link resource information, wherein the OTN device adaptation device is located between a network node of the OTN network and a software defined network SDN controller; the reporting module is configured to set the node resource information and/or the chain The road resource information is reported to the SDN controller.
  • the reporting module includes: a setting unit, configured to: in the configuration information of the OpenFlow protocol, set indication information for indicating the node resource information and/or the link resource information; It is arranged to send configuration information containing the indication information to the SDN controller.
  • the setting unit is further configured to: assign a flag bit in the configuration information of the OpenFlow protocol to indicate the node resource information and/or the link resource information.
  • the OTN device adaptation device acquires resources under the OTN model from the OTN network, and reports the resources to the SDN technical means, and solves the problem that the SDN cannot control the resources under the OTN model in the related art. Enhanced the adaptability and management capabilities of the SDN network.
  • FIG. 1 is a flowchart of a resource reporting method of an OTN according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a resource reporting apparatus of an OTN according to an embodiment of the present invention
  • FIG. 3 is a block diagram showing still another structure of a resource reporting apparatus of an OTN according to an embodiment of the present invention.
  • FIG. 4 is a diagram of an SDN network supporting an OTN model according to an embodiment of the present invention.
  • FIG. 5 is a message structure diagram of an OpenFlow acquisition configuration according to an embodiment of the present invention.
  • FIG. 6 is a diagram of a device module relationship according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a resource reporting system of an OTN according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of an OTN resource adaptation apparatus transmitting an OTN resource to an SDN controller according to an embodiment of the present invention
  • FIG. 9 is a flow chart of reporting NODE information to an SDN controller when a NODE resource changes according to an embodiment of the present invention.
  • FIG. 10 is a flow chart of reporting NODE and LINK information to an SDN controller when a LINK resource changes according to an embodiment of the present invention
  • FIG. 11 is a flow chart of an OTN resource adaptation message sent by an OTN device adaptation apparatus to an SDN controller according to an embodiment of the present invention
  • FIG. 12 is a flowchart of querying an OTN resource information message by a user APP according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a resource reporting method of an OTN according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step S102 the OTN device adaptation device acquires node resource information and/or link resource information from a network node of the OTN network, where the OTN device adaptation device is located between the network node and the SDN;
  • Step S104 The OTN device adaptation device reports the node resource information and/or the link resource information to the SDN controller.
  • the OTN device adaptation device acquires the resources under the OTN model from the OTN network, and reports the resources to the SDN technical means to solve the related In the technology, the SDN cannot control the resources under the OTN model, so that the OTN service based on the wavelength switching and the time slot exchange can implement the SDN access based on the packet switching, and the adaptation and control capability of the SDN network is enhanced.
  • the reporting process that is implemented in the foregoing step S104 may be implemented by: setting indication information for indicating node resource information and/or link resource information in the configuration information of the OpenFlow protocol; and including the indication information.
  • the configuration information is sent to the SDN controller, wherein the node resource information and/or the link resource information may be indicated by a flag bit assignment in the configuration information of the OpenFlow protocol.
  • the configuration information carrying the changed node resource information and/or the link resource information is sent to the SDN control.
  • the OTN device adaptation device can also receive an application from the SDN controller to use and/or de-use the node resource and/or the link resource, and query the node resource information and/or the chain Road resource information.
  • the OTN device adapting device sends a link request to the SDN controller;
  • the OTN device adaptation device establishes a link with the SDN controller.
  • an OTN resource reporting apparatus is also provided, which is applied to the OTN device adaptation apparatus, and is used to implement the foregoing embodiments and preferred embodiments.
  • the modules involved are explained.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • 2 is a structural block diagram of a resource reporting apparatus of an OTN according to an embodiment of the present invention. As shown in FIG. 2, the method includes:
  • the obtaining module 20 is configured to acquire node resource information and/or link resource information from a network node of the OTN network, where the OTN device adaptation device is located between the network node and the SDN;
  • the reporting module 22 is connected to the obtaining module 20 and configured to report the node resource information and/or the link resource information to the SDN controller.
  • the OTN device adaptation device acquires resources under the OTN model from the OTN network, and reports the resources to the SDN technical means.
  • the problem that the SDN cannot control the resources under the OTN model is realized, so that the OTN service based on the wavelength switching and the time slot exchange can implement the SDN access based on the packet switching, and the adaptation and control capability of the SDN network is enhanced. .
  • the reporting module may include the following unit: a setting unit 220 configured to be set in the configuration information of the OpenFlow protocol for indicating The indication information of the node resource information and/or the link resource information; the sending unit 222 is connected to the setting unit 220 and configured to send the configuration information including the indication information to the SDN controller.
  • the setting unit 220 is further configured to assign a flag bit in the configuration information of the OpenFlow protocol to indicate the node resource information and/or the link resource information.
  • the OFPT_GET_CONFIG_REPLY message is also used to incrementally report the changed resource
  • the MPLS controller can send the OFPT_GET_CONFIG_REQUEST message to query the OTN resource information through the SDN application (APPLICATION, APP for short), so that the SDN controller can obtain the resource information of the OTN device in real time for reporting and control.
  • SDN application APPLICATION, APP for short
  • the above method runs on the OTN device adaptation device, and communicates with the SDN controller through the device, and the SDN network structure after accessing the OTN device is as shown in FIG. 4, wherein the resource of the OTN device model includes NODE information (corresponding to the above)
  • NODE information corresponding to the above
  • the node resource information of the embodiment and the LINK information corresponding to the link resource information of the foregoing embodiment
  • the node resource information can be understood as the related resource information of the node in the OTN network
  • the link resource information can be understood as Is the resource information of the link between nodes.
  • the OFPT_GET_CONFIG_REQUEST message in the OpenFlow message has only a message header and no message body, and is used by the SDN controller to initiate a query request to the OTN device adaptation device to query resources under the OTN network.
  • the OFPT_GET_CONFIG_REPLY message is used by the OTN device adaptation device to report the resources of the OTN network to the SDN controller.
  • the message structure is as shown in FIG. 5, and the contents of the flag field are expanded, and the OFPC_OTN_NODE and OFPC_OTN_LINK configuration types are added as follows:
  • OFPC_FRAG_NORMAL 0, /*No special handling for fragments*/
  • OFPC_FRAG_DROP 1 ⁇ 0,/*Drop fragments*/
  • OFPC_FRAG_REASM 1 ⁇ 1,/*Reassemble(only if OFPC_IP_REASM set).*/
  • OFPC_OTN_NODE 1 ⁇ 2,/*OTN NODE INFO*/
  • OFPC_OTN_LINK 5,/*OTN LINK INFO*/
  • the value of the length field is the length of the data, and the data field is used to store NODE information or LINK information that matches the flag.
  • the configuration type of the OFPT_GET_CONFIG_REPLY message is extended, and the OFPC_OTN_NODE and OFPC_OTN_LINK types are added to support the reporting of the OTN resource, and the SDN controller is communicated through the OpenFlow protocol.
  • the SDN controller is compatible with the OTN network and reported.
  • an OTN device reporting control device based on the OpenFlow protocol is provided, and the content of the OpenFlow protocol OFPT_GET_CONFIG_REPLY message is extended to solve the above problem.
  • the device includes the following parts:
  • the obtaining module 60 (corresponding to the obtaining module 20 of the foregoing embodiment) is configured to acquire NODE information and LINK information in the OTN network;
  • the storage module 62 is configured to store the obtained OTN resource
  • the management module 64 is configured to allocate and recycle the NODE and LINK resources, update the available status of each resource in real time, and determine whether the SDN controller needs to be reported;
  • the receiving module 66 is configured to receive and process an OpenFlow message sent by the SDN controller.
  • the sending module 68 (corresponding to the reporting module 22 of the above embodiment) is configured to send OTN model resource information to the SDN controller.
  • an OTN resource reporting system is further provided.
  • the OT controller 70 includes a network node 72 of the OTN network, and further includes: an OTN device adaptation device 74, located at the network node.
  • the SDN controller 70 is configured to acquire the node resource information and/or the link resource information from the network node of the OTN network, and report the node resource information and/or the link resource information to the SDN controller, where The SDN controller saves and reports node resource information and/or link resource information.
  • the OTN device adaptation device is set up between the network node and the SDN control, and the OTN device adaptation device acquires the resources under the OTN model from the OTN network, and the technical means for reporting the resources to the SDN is solved.
  • the SDN cannot report and control the resources under the OTN model, so that the OTN service based on the wavelength switching and the time slot exchange can be implemented in the SDN access based on the packet switching, and the adaptation and reporting capability of the SDN network is enhanced. .
  • the OTN device adaptation device 74 is further arranged to send a link request to the SDN controller 70 and establish a link with the SDN controller 72 upon triggering of the link request.
  • the preferred embodiment of the present invention describes that after the OTN device adaptation device is powered on, the resource information of the OTN network is acquired and stored, and then a link request is initiated to the SDN controller through the OpenFlow message. After the session is successfully established, the SDN is actively sent to the SDN. The controller reports all NODE information and LINK information of the OTN network in full.
  • the flowchart is shown in Figure 8.
  • Step S800 the OTN model adaptation device is powered on, and each module is initialized
  • Step S802 The adaptation device acquires resource information under the current node (NODE) and LINK information with other nodes;
  • Step S804 storing the obtained NODE information and LINK information into the memory
  • Step S806 Send an OFPT_FEATURES_REQUEST message to the SDN controller, request to establish a session link, and receive an OFPT_FEATURES_REPLY message that the SDN controller responds, and the session is successfully established.
  • step S808 the flag of the configuration message is assigned to OFPC_OTN_NODE, and the OFPT_GET_CONFIG_REPLY message is sent to the SDN controller, and the NODE information is reported in full.
  • the SDN controller receives the information and stores it locally for management.
  • step S810 the flag of the configuration message is assigned to OFPC_OTN_LINK, and the OFPT_GET_CONFIG_REPLY message is sent to the SDN controller, and the LINK information is reported in full.
  • the SDN controller receives the information and stores it locally for management.
  • the preferred embodiment 2 describes that the OTN device adaptation device manages and controls the resource information in the OTN network in real time.
  • the change of the OTN service causes the resource information to change.
  • the adaptation device will change.
  • the NODE resource is sent to the SDN controller through the report message, so that the SDN controller can grasp the available resources in the OTN network element in real time, and perform corresponding control on the OTN service.
  • the flow chart is shown in Figure 9:
  • Step S900 The service in the OTN network element changes, and the OTN device adaptation device controls and manages the NODE resource.
  • Step S902 The OTN device adaptation device determines whether the operated NODE resource has changed.
  • Step S904 Assign the flag of the configuration message to OFPC_OTN_NODE, send an OFPT_GET_CONFIG_REPLY message to the SDN controller, and report the changed NODE resource incrementally, and the SDN controller receives the update to the local for management.
  • Step S906 Perform this step when the NODE resource has not changed.
  • the preferred embodiment 3 describes that the OTN device adaptation device manages and controls the resource information in the OTN network in real time.
  • the change of the fiber connection in the OTN network element causes the OTN network topology to change.
  • the adaptation device sends all the LINK resources and all the NODE resources to the SDN controller through the report message, so that the SDN controller can grasp the topology and resource information of the OTN network in real time, and perform path resources and device resources available for the OTN service. management.
  • the flow chart is shown in Figure 10:
  • Step S1000 The OTN network element connection fiber changes, and the OTN device adaptation device reacquires the LINK resource.
  • Step S1002 The OTN device adaptation device reacquires the NODE resource.
  • Step S1004 Assigning the flag of the configuration message to OFPC_OTN_NODE, sending an OFPT_GET_CONFIG_REPLY message to the SDN controller, reporting the NODE information in full, and updating the SDN controller to the local device after receiving the message For management (see message 3 in Figure 11).
  • Step S1006 Assign the C flag bit of the configuration message to OFPC_OTN_LINK, send an OFPT_GET_CONFIG_REPLY message to the SDN controller, report the LINK information in full, and update the SDN controller to the local for management (see Figure 4, message 4).
  • the preferred embodiment 4 of the present invention describes that the user can query the SDN controller for the resource information of the OTN network through the APP program of the SDN.
  • the flow chart is shown in Figure 12 below.
  • Step S1200 The user initiates a query request to the SDN controller through the APP.
  • Step S1202 After receiving the query request, the SDN controller initiates a request to the OTN model adaptation apparatus by using the OFPT_GET_CONFIG_REQUEST message of the OpenFlow, and the message is only the header of the OpenFlow.
  • Step S1204 After receiving the OFPT_GET_CONFIG_REQUEST request, the OTN model adaptation device reads the locally stored NODE information, uses the OFPC_OTN_NODE configuration type, and reports the OFPT_GET_CONFIG_REPLY message to the SDN controller, and the SDN controller can update the local OTN model NODE information.
  • Step S1206 The OTN model adaptation device reads the locally stored LINK information, and uses the OFPC_OTN_LINK configuration type to report to the SDN controller through the OFPT_GET_CONFIG_REPLY message, and the SDN controller can update the local OTN model LINK information.
  • Step S1208 The SDN controller sends the updated NODE information and the LINK information to the user APP to complete the query.
  • the embodiment of the present invention achieves the following technical effects: the problem that the SDN cannot manage and control the resources under the OTN model in the related art is solved, so that the OTN service based on the wavelength switching and the time slot exchange can be based on Packet-switched SDN access enhances the adaptation and management capabilities of the SDN network.
  • a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the foregoing technical solution provided by the present invention can be applied to a resource reporting process, and the OTN device adaptation device acquires resources under the OTN model from the OTN network, and reports the resources to the SDN technical means, and solves the related technology, SDN.
  • the problem of resources under the OTN model cannot be controlled, and the adaptation and management capabilities of the SDN network are enhanced.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé, un système et un dispositif de compte rendu de ressources d'un réseau de transport optique (OTN), le procédé comportant les étapes consistant à: faire acquérir, par un dispositif d'adaptation d'appareil d'OTN, et à partir de nœuds de réseau de l'OTN, des informations de ressources de nœuds et/ou des informations de ressources de liaisons, le dispositif d'adaptation d'appareil d'OTN étant situé entre le nœud de réseau et un contrôleur de réseau défini par logiciel (SDN); et faire rendre compte, par le dispositif d'adaptation d'appareil d'OTN, des informations de ressources de nœuds et/ou des informations de ressources de liaisons au contrôleur de SDN. La solution technique ci-dessus décrite dans la présente invention pallie le problème, rencontré dans la technique apparentée, de l'impossibilité pour le SDN de contrôler des ressources dans le modèle OTN. L'OTN fait l'objet d'un accès dans le SDN, et les capacités d'adaptation et de gestion du SDN sont accrues.
PCT/CN2016/071060 2015-01-28 2016-01-15 Procédé, système et dispositif de compte rendu de ressources d'un réseau de transport optique WO2016119602A1 (fr)

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WO2014058764A1 (fr) * 2012-10-08 2014-04-17 Huawei Technologies Co. Ltd. Virtualisation des fonctions de transport pour les réseaux optiques basés sur le multiplexage par répartition en longueur d'onde (wdm)
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