CN107294753A - A kind of SDN/NFV opens access net system and the method for managing ONU/ONT - Google Patents
A kind of SDN/NFV opens access net system and the method for managing ONU/ONT Download PDFInfo
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- CN107294753A CN107294753A CN201610221311.XA CN201610221311A CN107294753A CN 107294753 A CN107294753 A CN 107294753A CN 201610221311 A CN201610221311 A CN 201610221311A CN 107294753 A CN107294753 A CN 107294753A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
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Abstract
Access net system is opened the invention discloses a kind of SDN/NFV, including：Virtual optical line terminal vOLT, access network equipment and ONU/ONT with Openflow exchange capacities；Wherein, the vOLT passes through open flows Openflow exchange networks and the access network equipment intercommunication；The access network equipment passes through optical distribution network ODN and the ONU/ONT intercommunications.The method that access net system manages ONU/ONT is opened the invention also discloses a kind of SDN/NFV, SDN OVS networks are combined by the present invention with traditional ONU/ONT management, take full advantage of original ODN network architectures, and the management process for simplifying the configuration of SDN controllers, safeguarding, updating ONU/ONT.
Description
Technical field
The present invention relates to communication technique field, espespecially a kind of SDN/NFV opens access net system and the method for managing ONU/ONT.
Background technology
In conventional access network, webmaster such as Element management system (EMS, Element Management System) and optical line terminal (OLT, Optical Line Terminal) docking, the graphical interfaces of optical network unit management control interface (OMCI, ONU Management and Control Interface) management can be provided.Software defined network (SDN, Software Define Network) is as a kind of new network architecture, by the way that network is controlled and the decoupling network architecture for building open programmable of forwarded.SDN is abstract to shield bottom complexity to network progress, provides and simply, efficiently configures and management for network.For access network, network on access network OLT will virtualize (NFV in face of more and more extensive SDN/ network functions, Network Function Virtualization) trend, forwarding mechanism and open flows virtual switch (OVS, Openflow Virtual Switch) based on open flows (Openflow) can be provided.
Passive optical-fiber network (PON, Passive Optical Network) makes that maintenance is simple, reliability is high, cost is low because it eliminates active equipment between local side and user terminal.Simultaneously, PON is also because its wide covering, highdensity be connected to user's optical network unit (ONU, Optical Network Unit) many advantages, such as, under SDN/NFV trend, still there is very big value as one section of network closest to user, discussion of the industry on how to build SDN/NFV Novel open access networks is still continuing.In addition, because the characteristic such as ripe, office point fixation of optical distribution network (ODN) that OLT is connected with tradition ONU, SDN/NFV improvement costs are high, therefore, PON simply can not be replaced and replaced by OVS.That is, traditional ONU management also still has very strong vitality in SDN/NFV networks.
Therefore, need a kind of new network structure and communication management method, SDN OVS networks can be combined with traditional ONU management, following SDN demands of one side adaptive surface phase, on the other hand the advantage that can be managed again using tradition ONU, can be cost-effective when transforming network structure, improve efficiency.
The content of the invention
In order to solve the above-mentioned technical problem, access net system and the method for managing ONU/ONT are opened the invention provides a kind of SDN/NFV, SDN OVS networks can be combined with traditional ONU/ONT management, following SDN demands of one side adaptive surface phase, on the other hand the advantage that can be managed again using tradition ONU/ONT, so as to cost-effective when network structure is transformed, efficiency is improved.
In order to reach the object of the invention, access net system is opened the invention provides a kind of software defined network SDN/ network functions virtualization NFV, including：Virtual optical line terminal vOLT, access network equipment and ONU/ONT with open flows Openflow exchange capacities；Wherein,
The vOLT passes through Openflow exchange networks and the access network equipment intercommunication；The access network equipment passes through optical distribution network ODN and the ONU/ONT intercommunications.
Wherein, the vOLT, is configured on SDN controllers, including OMCI management modules, and the OMCI management modules are used to OMCI origination messages being encapsulated as management data frame by southbound interface mapping and give the access network equipment by the Openflow exchange networks；The access network equipment with Openflow exchange capacities, Agent is acted on behalf of including SDN, the SDNAgent includes OMCI processing modules, the OMCI processing modules are used to decapsulate the management data frame, and OMCI message is packaged into again, by the OMCI message and give the ONU by ODN；The ONU/ONT, including OMCI Agent, for receiving the OMCI message, and carry out OMCI configurations.
Wherein, the OMCI management modules of the vOLT, for being encapsulated as managing data frame by the mapping of OMCI origination messages by OF-Config/Netconf.
Wherein, OMCI origination messages mapping is encapsulated as managing data frame by the OMCI management modules of the vOLT, the negotiation data channel pattern NDM for extending OF-Config/Netconf.
Wherein, the access network equipment with Openflow exchange capacities, including open flows virtual switch OVS and optical line terminal OLT passive optical network PON media access control layer MAC, the OLT PON MAC are located at the second line of a couplet of the OVS, and with the ONU intercommunications；The OVS be located at the OLT PON MAC the first line of a couplet, and with the vOLT intercommunications.
Wherein, the access network equipment with Openflow exchange capacities, including SDN optical line terminal OLTs.
The method that ONU is managed in access net system is opened present invention also offers a kind of SDN/NFV, methods described includes：
OMCI origination messages are encapsulated as management data frame by southbound interface mapping and give the access network equipment with Openflow exchange capacities by open flows Openflow exchange networks by the vOLT configured on SDN controllers；
The access network equipment with Openflow exchange capacities is decapsulated and Resealed processing to the management data frame, is restored OMCI message and is given ONU/ONT by ODN；
The ONU/ONT receives the OMCI message, and carries out OMCI configurations.
Wherein, the mapping of OMCI origination messages is encapsulated as managing data frame by the vOLT by OF-Config/Netconf.
Wherein, OMCI origination messages mapping is encapsulated as managing data frame by the vOLT by extending OF-Config/Netconf negotiation data channel pattern NDM.
Wherein, the access network equipment with Openflow exchange capacities, including open flows virtual switch OVS and passive optical network PON media access control layer MAC, the OLT PON MAC are located at the second line of a couplet of the OVS, and with the ONU intercommunications；The OVS be located at the OLT PON MAC the first line of a couplet, and with the vOLT intercommunications.
Wherein, the access network equipment with Openflow exchange capacities includes SDN optical line terminal OLTs.
Compared with prior art, access net system and the method for managing ONU are opened the embodiments of the invention provide a kind of SDN/NFV, Openflow Capable Switch can be modeled as by opening SDN OLT or OLT OLT PON MAC in access network by improved SDN, directly interconnected with the OVS of data center, new management framework is provided for traditional ONU management.
Further, SDN/NFV provided in an embodiment of the present invention opens the method that access net system manages ONU, applied with the vOLT on SDN controllers as management source, by the way that OMCI origination messages are carried out into OF-Config message encapsulation, the SDN Agent modules decapsulation that access network is sent in SDN OLT or OLT PON MAC is opened by SDN/NFV, and the OMCI message of traditional ITU-T G.984.4 forms is re-packaged into, realize management mode point-to-multipoint between OLT and ONU.The network architecture and way to manage that the embodiment of the present invention is used, only transform the network on OLT and OLT, network under OLT is that ODN and ONU need not then be transformed, and takes full advantage of original ODN network architectures, the management process for simplify the configuration of SDN controllers, safeguarding, update ONU/ONT.Also, the embodiment of the present invention is easily extended and quickly upgrading is docked with the new exchange networks of Openflow, is improved the efficiency of management, is reduced management cost.
Other features and advantages of the present invention will be illustrated in the following description, also, is partly become apparent from specification, or is understood by implementing the present invention.The purpose of the present invention and other advantages can be realized and obtained by specifically noted structure in specification, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical solution of the present invention, and constitutes a part for specification, is used to explain technical scheme together with embodiments herein, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the configuration diagram that SDN/NFV of the embodiment of the present invention opens access network；
Fig. 2 is the communication scheme that SDN/NFV of the embodiment of the present invention opens access network；
Fig. 3 a model schematic diagram for a kind of of Openflow Capable of embodiment of the present invention Switch；
Fig. 3 b are Openflow Capable of embodiment of the present invention Switch another modeling schematic diagram；
Fig. 4 is system architecture schematic diagrams of the OMCI of the embodiment of the present invention by SDN controller managements ONU；
Fig. 5 is the manageable OVS resources schematic diagrames of Openflow Resource in OF-Config1.2；
Fig. 6 be OF-Config1.2 of the embodiment of the present invention in include the manageable OVS resources schematic diagrames of NDM class Openflow Resource；
Fig. 7 is OF-Config/Netconf of embodiment of the present invention protocol hierarchies and the data being respectively layered encapsulation example schematic diagram；
Fig. 8 is the mapping relations schematic diagram that OMCI of the embodiment of the present invention is encapsulated by OF-Config/Netconf.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, embodiments of the invention are described in detail below in conjunction with accompanying drawing.It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.
It can be performed the step of the flow of accompanying drawing is illustrated in the computer system of such as one group computer executable instructions.And, although logical order is shown in flow charts, but in some cases, can be with the step shown or described by being performed different from order herein.
According to G984.3 standards, ONU control, management layer have three parts：Embedded (operation management maintainance OAM, Operation Administration and Maintenance), physical layer OAM (PLOAM) and OMCI.OMCI is one kind therein, and it is high-rise control, management provides unified interface.OMCI is Gigabit Passive Optical Network (GPON, Gigabit-capable Passive Optical Network) a kind of configuration transmission channel defined in standard, by in OLT and ONU/ ONT Optical Network Terminals (ONT, Optical network terminal) set up proprietary asynchronous transfer mode (ATM between (hereafter unify use term ONU), Asynchronous Transfer Mode) permanent tunnel (PVC, Permanent Virtual Channel) or G-PON Encapsulation Mode (GEM, GPON Encapsulation Mode) port (PORT) transmission OMCI message, acquisition ONU abilities for providing standard, and it is managed and controlled.
The structure person (InP) that current basal Virtual network operator is network is also the supplier (SP) of network service.Because networking needs substantial amounts of investment, operator, which wishes to find a kind of method, can quickly recoup capital outlay and realize profit.Multiple virtual networks are virtually dissolved based on same physical network, and realize resource, control, the isolation of management, different business is carried respectively or virtual network is runed as a service subpackage to different VNOs (VNO).This idea is possibly realized in the SDN/NFV epoch.The embodiment of the present invention invents a physical access network access network of multiple logics.To adapt to SDN/NFVization demand, existing conventional access network is transformed.
Access planar network architecture is opened the embodiments of the invention provide a kind of SDN/NFV, is a kind of framework being managed by SDN controllers by vOLT to long-range ONU, meets SDN/NFV evolution thinking.
The software defined network SDN/ network functions virtualization NFV of the embodiment of the present invention opens access net system, including：Virtual optical line terminal vOLT, access network equipment and ONU/ONT with Openflow exchange capacities；Wherein, the vOLT passes through Openflow exchange networks and the access network equipment intercommunication；The access network equipment passes through optical distribution network ODN and the ONU/ONT intercommunications.
Further, the vOLT, configuration is on SDN controllers, including OMCI management modules, and the OMCI management modules are used to OMCI origination messages being encapsulated as management data frame by southbound interface mapping and give the access network equipment by the Openflow exchange networks；The access network equipment with Openflow exchange capacities, Agent is acted on behalf of including SDN, the SDNAgent includes OMCI processing modules, the OMCI processing modules are used to decapsulate the management data frame, and OMCI message is packaged into again, by the OMCI message and give the ONU by ODN；The ONU/ONT, including OMCI Agent, for receiving the OMCI message, and carry out OMCI configurations.Here, OMCI message can be specifically ITU G.984.4OMCI message.
Specifically, the OMCI management modules of the vOLT, for the mapping of OMCI origination messages to be encapsulated as managing data frame by OF-Config/Netconf.Here, OMCI origination messages mapping is encapsulated as managing data frame by the OMCI management modules of the vOLT, the negotiation data channel pattern NDM for extending OF-Config/Netconf.
Specifically, the access network equipment with Openflow exchange capacities, including open flows virtual switch OVS and optical line terminal OLT passive optical network PON media access control layer MAC, the OLT PON MAC are located at the second line of a couplet of the OVS, and with the ONU intercommunications；The OVS be located at the OLT PON MAC the first line of a couplet, and with the vOLT intercommunications.Or, the access network equipment with Openflow exchange capacities includes SDN optical line terminal OLTs.In specific framework following article shown in Fig. 3 a, Fig. 3 b.
As shown in Figure 1, 2, it is that SDN/NFV of the embodiment of the present invention opens access net system and its communication scheme.
As shown in figure 1, opening the architecture of access net system for SDN/NFV of the embodiment of the present invention, the framework relation of SDN/NFV open networks of the embodiment of the present invention is shown in detail.In the embodiment of the present invention, OLT OLT PON MAC layers (Transmission Convergence (GTC) layer) and following physical layer are retained, network edge is deployed in and is interconnected with ONU.
As shown in Figure 1, by the OVS switch networks that the network design more than PON first line of a couplet is standard, the Openflow exchange networks of i.e. typical leaf-backbone (Leaf-Spine) framework, are realized by the access network equipment with Openflow exchange capacities.Wherein, Leaf-Spine Openflow exchange networks include the second line of a couplet that Spine OVS and Leaf OVS, Leaf OVS are deployed in Spine OVS, and each Spine OVS are interconnected with all Leaf OVS.Operator can flexibly define a virtual network (vNET) according to Internet resources, then give a VNO (VNO) and be managed, so as to realize that the multi-tenant based on a physical network is divided.
As shown in figure 1, being said for OLT access partial function, traditional OLT function modelings to virtual OLT (vOLT) are supplied to the functions such as flexible management, configuration, the control of VNO progress PONs part by the embodiment of the present invention.Wherein, vOLT may reside within SDN controllers (SDN Controller), can also reside in other general calculating platforms such as X86 cloud service centers, eliminate the reliance on traditional OLT Host equipment room, so as to realize the decoupling of OLT functions and physical location.As shown in figure 1, in SDN controllers, multiple vOLT can be disposed, such as vOLT0, vOLT1 ..., vOLTn.Wherein, n is the integer not less than 1.
As shown in figure 1, in the embodiment of the present invention, traditional OLT many controls, management function will be componentized, SDN controllers (SDN Controller) are above moved to.Traditional OLT part or all of control, management function is provided by the vOLT of SDN controllers.The vOLT of SDN controllers controls the access network equipment with Openflow exchange capacities by southbound interfaces such as OF-Config.The ODN networks (ODN Network) that access network equipment with open flows Openflow exchange capacities is connected with ONU can keep constant.
SDN/NFV as shown in Figure 1 is opened in access planar network architecture, and different ONU set (ONUs) are controlled by different vOLT.Wherein, including by vOLT1 ONUs (vOLT1controlled ONUs), the ONUs (vOLT0controlled ONUs) that two are controlled by vOLT0, the ONUs (vOLT2controlled ONUs) controlled by vOLT2, the ONUs (vOLT0controlled ONUs) controlled by vOLT1 and the ONUs (vOLTn controlled ONUs) controlled by vOLTn controlled.
As shown in Figure 2, it is the communication logic relation rough schematic view that SDN/NFV opens access net system for the embodiment of the present invention, basically illustrate OMCI and pass through the logical relation that SDN/NFV opens access network, it is also assumed that being the logical abstraction shown in Fig. 1 in architecture, omit OVS go-betweens.As shown in Fig. 2 after SDN/NFV transformations, the embodiment of the present invention opens access planar network architecture for the SDN/NFV shown in Fig. 1 to move to vOLT in the OMCI management modules that ONU is managed on traditional OLT, that is to say, that OMCI management modules are deployed on vOLT.The management to ONU is realized by OMCI by vOLT.VOLT OMCI origination messages are mapped by southbound interface to be encapsulated, the SDN agencies (Agent) reached by Openflow switching networks network layers (Openflow Layer) on OLT PON MAC or SDN OLT carry out protocol conversion, restore as traditional ITU-T G.984.4OMCI message formats, continue to continue to use ODN networks carrying out ONU management.That is, the OMCI message after being reduced on OLT PON MAC or SDN OLT reaches ONU by PON layers of encapsulation (Legacy PON Layer), to realize the management to ONU.In this way, framework provided in an embodiment of the present invention greatly make use of original ODN networks, management cost is reduced, the speed of access network SDN/NFVization transformation is improved.
For access network, evolution tendency of traditional OLT PON access networks towards SDN/NFV, it is desirable to provide Openflow exchange capacities.Its original access network part needs to transform access network facing the future, with Openflow exchange capacities as.As shown in Figure 3 a, 3 b, it is to have the access network equipment of Openflow exchange capacities is possible to realize structural representation in the embodiment of the present invention (i.e. Openflow Capable Switch realize structural representation in the possible of access device).The specific manifestation form that the SDN/NFV of the embodiment of the present invention opens openflow Capable Switch in access net system can have two kinds, be specifically as follows：OVS+OLT PON MAC+ONUs (shown in Fig. 3 a) and SDN OLT+ONUs (shown in Fig. 3 b).Wherein, Openflow Capable Switch are a generic concepts.Definition of the Openflow Capable Switch in OF-CONFIG1.2 standards be：One can provide a physics or virtual switching equipment for Openflow logical switch contexts.Openflow Capable Switch, which are included, can be instantiated by Openflow logical switch, manageable Openflow resources.
There is provided two of the access network equipment with Openflow exchange capacities kind specific implementation as shown in Figure 3 a, 3 b.As shown in Figure 3 a, access network equipment (access network equipment for being modeled as Openflow Capable Switch) with Openflow exchange capacities can include OVS and OLT PON MAC, wherein, OVS is located at the OLT PON MAC first line of a couplet, OLT PON MAC are located at multiple ONU (i.e. ONUs in Fig. 3 a) first line of a couplet, and OVS is interconnected by OLT PON MAC and ONUs.As shown in Figure 3 b, the access network equipment (access network equipment for being modeled as Openflow Capable Switch) with Openflow exchange capacities can include：SDN OLT, SDN OLT as multiple ONU (i.e. ONUs in Fig. 3 b) the first line of a couplet.Specific modeling details is not described here, and the embodiment of the present invention is also not restricted to both modes.
As shown in Figure 4, logic chart is implemented for SDN/NFV of embodiment of the present invention opening access net systems, show and implement logic in architecture shown in Fig. 1, it is also assumed that Fig. 4 is the logical architecture schematic diagram that OMCI manages ONU by SDN controllers southbound interface, omit OVS.OVS configuration protocol mainly has OF-Config1.2/Netconf, OVS database (OVSDB) etc..Openflow agreements are then primarily upon the forward process of definition and the flow table driving of flow table in itself.OVS can pass through SDN controller southbound interface management legacys ONU.In the embodiment of the present invention, ONU OMCI is managed with simulating traditional OLT by OF-Config1.2, realizes and SDN OLT or OLT PON MAC OMCI is managed.
As shown in figure 4, vOLT management physical entities OLT process includes：Traditional OLT position is replaced by SDN OLT/OLT PON MAC.In the embodiment of the present invention, conventional physical OLT is evolved to the basis that SDN OLT or OLT PON MAC, SDN OLT or OLT PON MAC provide the access network equipment with Openflow exchange capacities.But OLT hardware is inherently alerted in SDN OLT or OLT PON MAC, state still has, and directly can be managed and collected by vOLT.Simple Network Management Protocol (SNMP) management information bank (MIB) on OLT on traditional OLT, above moves to management of the vOLT MIB offers to SDN OLT/OLT PON MAC, and management vOLT can divide the part physical resource of control.SDN OLT/OLT PON MAC are local resident there is no MIB.
As shown in figure 4, vOLT management physical entities ONU process includes：VOLT is managed by the way that OMCI origination messages are encapsulated in the data frame of southbound interface to long-range ONU.OMCI message, which is encapsulated by the south orientation configuration protocol such as OF-Config/Netconf and passes through Openflow exchange networks, reaches Openflow Capable Switch (i.e. SDN OLT+ONUs or OVS+OLT PON MAC+ONUs).This OMCI meets following SDN/NFV across Openflow network management legacys ONU mode by encapsulation and melts the evolution thinking for putting access network.
The embodiment of the present invention additionally provides a kind of SDN/NFV and opens the method that ONU is managed in access net system, and methods described includes：OMCI origination messages are encapsulated as management data frame by southbound interface mapping and give the access network equipment with Openflow exchange capacities by Openflow exchange networks by the vOLT configured on SDN controllers；The access network equipment with Openflow exchange capacities is decapsulated and Resealed processing to the management data frame, is restored OMCI message and is given ONU/ONT by ODN；The ONU/ONT receives the OMCI message, and carries out OMCI configurations.Here, OMCI message can be specifically ITU G.984.4OMCI message.
Further, the mapping of OMCI origination messages is encapsulated as managing data frame by the vOLT by OF-Config/Netconf.Specifically, the vOLT is by extending OF-Config/Netconf negotiation data channel pattern NDM, OMCI origination messages mapping is encapsulated as managing data frame.Here, the specific framework of the access network equipment with Openflow exchange capacities is being described above, repeats no more.
As shown in figure 4, vOLT management physics OLT and ONU flow can include substantially：
Step 401：The framing that vOLT offer OMCI origination messages are encapsulated into southbound interface (according to the south orientation such as OF-Config/Netconf configuration protocol) manages data frame, is sent to SDN OLT or OLT PON MAC.VOLT uses XML language by OF-Config/Netconf encapsulation, can also extend the OMCI mib informations in transmission ONU；
Step 402：SDN OLT or OLT PON MAC will manage data frame termination by the OMCI processing modules in SDN Agent, by decapsulation, peel off after OF-Config encapsulation and be encapsulated as traditional OMCI message of ITU-T G.984.4 forms；
Step 403：OMCI message is sent to ONU by SDN OLT or OLT PON MAC by traditional PON interfaces, local in ONU, and the operation such as OMCI configurations, management, information is carried out by OMCI Agent, OMCI MIB and ONU data acquisition modules.The local OMCI MIB forms of ONU are constant, and SDN OLT or OLT PON MAC are given yet by OMCI report and alarms or state etc..
Wherein, traditional OLT reserves 255 GemPort (including OMCC passages) to every PON mouthfuls, and the ONU hung under OLT is managed by fixed reserved management passage.This characteristic of correspondence, SDN controllers and SDN Agent can realize that vOLT to ONU management passage is isolated by allocation manager IP and reserved TCP port.The method of salary distribution of IP+TCP ports can be handled by SDN controllers by the way of dynamic or static configuration, support the distribution of multiple management IP and its lower TCP port.
Because TCP connections can provide reliable data cube computation management passage.VOLT management ONU OMCI message is reached after physical entity OLT, manage reserved Gemport mapping by TCP port and tradition OLT by SDN Agent again, OMCI messages are still sent to respective ONU by traditional OLT to ONU optical network unit management and control channel (OMCC, Optical Network Unit Management and Control Channel).The management framework of this sections of SDN OLT/OLT PON MAC to ONU remains unchanged.
How it is further described with reference to Fig. 5, Fig. 6, Fig. 7, Fig. 8 by OF-Config/Nefconf encapsulation OMCI message.
As shown in figure 5, being the manageable OVS resources schematic diagrames of Openflow Resource in OF-Config1.2.As shown in figure 5, in the management of typical Openflow interchangers, usual controller uses OF-Config, OVS DB.Although Netconf and OpenFlow can provide the communication between controller software and equipment, two agreements are entirely different at many aspects.Netconf is a configuration protocol, and OpenFlow is how incoming by routeing in specified packet in flow table.OpenFlow interchanger is configured using OF-Config, and OF-Config more stresses the YANG model modelings exchanged for OVS, is communicated using Netconf and its extension with new Openflow Switch equipment.Shown in figure, Openflow Resources are defined for managing resource related to Openflow characteristics in OVS in OF-Config data model.It is inappropriate directly using typical case Openflow Resources in OF-Config data model for OMCI origination messages.
As shown in fig. 6, including the manageable OVS resources schematic diagrames of NDM class Openflow Resource in OF-Config1.2 of the embodiment of the present invention.As shown in fig. 6, the embodiment of the present invention defines negotiation data channel pattern (NDM, Negotiable Datapath Model) in OF-Config1.2.NDM main function is：Different manufacturers, the OVS interchangers of different qualities more flexible and convenient configure so as to follow-up by consulting NDM abilities with controller, drives OVS progress Openflow forwardings.Meanwhile, NDM may also be used for extension, to meet the specific demand of different equipment.OMCI origination messages are exactly that NDM messages are extended in the embodiment of the present invention, so as to carry out OMCI message encapsulation.
Wherein, OF-Config/Netconf agreements are obtained using extensible markup language (XML) as configuration data and the coded system of protocol message with C/S and RPC modes, corresponding some or all management informations in renewal or sweep equipment.XML can express the management object of complicated, with internal logical relationship modelling, substantially increase operating efficiency and objective metric, the message that class Master Information Block (MIB) can be provided or the data encapsulation for continuing to use traditional MIB, it is convenient to be interacted with the OMCI MIB on ONU, with powerful scalability.
As shown in fig. 7, being OF-Config/Netconf of embodiment of the present invention protocol hierarchies and the data being respectively layered encapsulation example schematic diagram.OF-Config/Netconf protocol encapsulation, it is seen that OF-Config operation fields can be to map OMCI typical operation.
As shown in figure 8, the mapping relations schematic diagram encapsulated for OMCI of the embodiment of the present invention by OF-Config/Netconf.Mapping relations according to Fig. 8, OMCI various typical operations can be packaged by the corresponding operations of OF-Config.G.984.4OMCI origination message can be encapsulated into OF-Config/Netconf by controller simply parsing and carries out data transmission (i.e. from SDN controller to SDN change new vOLT) ITU-T produced by vOLT.
In the embodiment of the present invention, how specifically to be encapsulated by XML language used in OF-Config/Netconf for OMCI origination messages, example is as follows：Message Type and Device identifier type fields in one OMCI Create message, its message are recognized and parsed by controller, into XML canned software processing modules.The core of the XML canned software processing modules is the OMCI over Netconf Yang models by privately owned extension.By OMCI over Netconf Yang model modelings in XML canned software processing modules, original OMCI message is transmitted by conversion and by XML data section.It is transmitted except Message Type and Device identifier type all fields can all be encapsulated into XML data section, reaches SDN OLT/OLT PON MAC.SDN agencies (Agent) on SDN OLT/OLT PON MAC are by decapsulation packet, then revert to OMCI origination messages and continue to pass to ONU.Whole encapsulation process corresponding relation is clear, and processing is simple.Other kinds of OMCI messages encapsulation process is repeated no more.
Similar protocol extension can also be carried out according to OMCI over OF-Config thinking for OMCI over OVS DB, its implementation is also within the scope of the embodiment of the present invention.For EPON system, ONU management is managed by OAM message, through being packaged by OF-Config after the extension by the present invention, therefore EPON system OAM message manages ONU framework also within the protection domain of the embodiment of the present invention by OF-Config.
Pass through the embodiment of the present invention, SDN OLT or OLT PON MAC in access network are opened by improved SDN, the OVS that Openflow Capable Switch and data center can be modeled as directly is interconnected, and the possibility of new management framework transformation is provided for traditional ONU management.
Further, applied with the vOLT on SDN controllers as management source, by the way that OMCI origination messages are carried out into OF-Config message encapsulation, the SDN Agent modules decapsulation in SDN OLT/OLT PON MAC is sent to by OVS networks, and remap and be reduced to the OMCI message of traditional ITU-T G.984.4 forms, realize management mode point-to-multipoint between OLT and ONU.The present invention takes full advantage of original ODN network architectures, the management process for simplify the configuration of SDN controllers, safeguarding, update ONU.Also, the embodiment of the present invention is easily extended and quickly upgrading is docked with the new exchange networks of Openflow, is improved the efficiency of management, is reduced management cost.
Although disclosed herein embodiment as above, described content be only readily appreciate the present invention and use embodiment, be not limited to the present invention.Technical staff in any art of the present invention; do not depart from disclosed herein spirit and scope on the premise of; any modification and change, but the scope of patent protection of the present invention can be carried out in the form and details of implementation, still be should be subject to the scope of the claims as defined in the appended claims.
Claims (11)
1. a kind of software defined network SDN/ network functions virtualization NFV opens access net system, it is special
Levy and be, including：Virtual optical line terminal vOLT, connecing with open flows Openflow exchange capacities
Log equipment and ONU/ONT；Wherein,
The vOLT passes through Openflow exchange networks and the access network equipment intercommunication；The access network
Equipment passes through optical distribution network ODN and the ONU/ONT intercommunications.
2. system according to claim 1, it is characterised in that
The vOLT, is configured on SDN controllers, including OMCI management modules, the OMCI
Management module is used to OMCI origination messages being encapsulated as management data frame by southbound interface mapping and passed through
The Openflow exchange networks give the access network equipment；
The access network equipment with Openflow exchange capacities, including SDN act on behalf of Agent, institute
Stating SDNAgent includes OMCI processing modules, and the OMCI processing modules are used for the management number
Decapsulated according to frame, and be packaged into OMCI message again, by the OMCI message and pass through ODN
Give the ONU；
The ONU/ONT, including OMCI Agent, for receiving the OMCI message, and are carried out
OMCI is configured.
3. system according to claim 2, it is characterised in that the OMCI management of the vOLT
Module, for being encapsulated as managing data frame by the mapping of OMCI origination messages by OF-Config/Netconf.
4. system according to claim 3, it is characterised in that the OMCI management of the vOLT
Module, the negotiation data channel pattern NDM for extending OF-Config/Netconf, by the OMCI
Origination message mapping is encapsulated as managing data frame.
5. the system according to any one of Claims 1-4, it is characterised in that described to have
The access network equipment of Openflow exchange capacities, including open flows virtual switch OVS and optical line terminal
OLT passive optical network PON media access control layers MAC, the OLT PON MAC are located at institute
State the OVS second line of a couplet, and with the ONU intercommunications；The OVS is located at the OLT PON MAC
The first line of a couplet, and with the vOLT intercommunications.
6. according to the system of any one of Claims 1-4, it is characterised in that described that there is Openflow
The access network equipment of exchange capacity, including SDN optical line terminal OLTs.
Managed 7. a kind of software defined network SDN/ network functions virtualization NFV is opened in access net system
ONU method, it is characterised in that methods described includes：
OMCI origination messages are mapped encapsulation by the vOLT configured on SDN controllers by southbound interface
Given for management data frame and by open flows Openflow exchange networks with Openflow exchange capacities
Access network equipment；
The access network equipment with Openflow exchange capacities is decapsulated to the management data frame
With Reseal processing, restore OMCI message and give ONU/ONT by ODN；
The ONU/ONT receives the OMCI message, and carries out OMCI configurations.
8. method according to claim 7, it is characterised in that the vOLT passes through
The mapping of OMCI origination messages is encapsulated as managing data frame by OF-Config/Netconf.
9. method according to claim 8, it is characterised in that the vOLT passes through extension
OF-Config/Netconf negotiation data channel pattern NDM, the OMCI origination messages are mapped and sealed
Fill as management data frame.
10. the method according to any one of claim 7 to 9, it is characterised in that described to have
The access network equipment of Openflow exchange capacities, including open flows virtual switch OVS and EPON
PON media access control layers MAC, the OLT PON MAC are located at the second line of a couplet of the OVS, and
With the ONU intercommunications；The OVS be located at the OLT PON MAC the first line of a couplet, and with the vOLT
Intercommunication.
11. the method according to any one of claim 7 to 9, it is characterised in that described to have
The access network equipment of Openflow exchange capacities includes SDN optical line terminal OLTs.
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| CN201610221311.XA CN107294753B (en) | 2016-04-11 | 2016-04-11 | A kind of method that SDN/NFV opens access net system and manages ONU/ONT |
| PCT/CN2016/099728 WO2017177619A1 (en) | 2016-04-11 | 2016-09-22 | Sdn/nfv open access network system, and method and device for managing onu |
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| WO2017177619A1 (en) | 2017-10-19 |
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