CN105553715A - Differentiation VTN realization method based on price in SDN architecture - Google Patents
Differentiation VTN realization method based on price in SDN architecture Download PDFInfo
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- CN105553715A CN105553715A CN201510927902.4A CN201510927902A CN105553715A CN 105553715 A CN105553715 A CN 105553715A CN 201510927902 A CN201510927902 A CN 201510927902A CN 105553715 A CN105553715 A CN 105553715A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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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
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/0816—Configuration setting characterised by the conditions triggering a change of settings the condition being an adaptation, e.g. in response to network events
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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
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/805—QOS or priority aware
Abstract
The present invention discloses a differentiation VTN realization method based on a price in an SDN architecture. The method comprises the steps of (1) carrying out the abstraction of the physical mean used by a network communication mode as VTNs with different characteristics, (2) building a quantitative model according to the physical characteristics and operational mechanisms of the VTNs and quantifying the service quality and use cost of the quantitative model, (3) mapping the quantified VTNs as differentiation services and packaging the service as an API to be called by an upper layer SDN, (4) negotiating the communication protocol of a physical device set in the VTNs by a VTN controller, loading the real-time state of the service according to an upper layer SDN calling interface, and coordinating and managing the protocol mode and operating condition of the physical device set in the VTNs. According to the method, a VTN architecture method is employed to allow a user to select and combine the VTNs according to the service without concerning for the physical means of a bottom layer.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the differentiation VTN implementation method based on price in a kind of SDN framework.
Background technology
Along with the fast development of the Internet, no matter be on basic network or IT supporting framework, traditional telecommunications network all starts to be faced with increasing challenge and pressure.Current generation must in the face of three challenges: be first that discharge model increases fast and causes local link congested, be secondly static network to the change means of complicated flow and limited efficiency, be finally that network guarantee ability is difficult to meet all kinds of service differentiation.
To address these problems just, the Internet industry proposes software defined network (SoftwareDefinedNetworking, be called for short SDN) concept, be intended to the innovation by the abstract promotion Network to network, and improve network from the angle schedule network resources of user, by northbound interface, the developer of software defined network can use the mode of software programming to realize calling heterogeneous networks resource and competence.Software defined network is a kind of novel network architecture and technology, originates from the CleanSlate research topic of Stanford University in 2006, is taught the concept formally proposing SDN in 2009 by McKeown.Be primarily characterized in that control plane is separated with Forwarding plane, open interface and centralized control.Forwarding plane is separated with control plane and network can be regarded as the virtual entity of a logic OR, by abstract for forwarding behavior, control bottom hardware by the software desk Implementation programmable in Centralized Controller, realize Internet resources distributed in demand flexibly; Standardized open interface is provided, the Seamless integration-of application and network can be realized; Centralized control then can obtain the global information of Internet resources (eg. stream, function, link, VTN) and carry out overall scheduling and optimization according to business demand to resource.In SDN, the network equipment is only merely responsible for the forwarding of data, can adopt general hardware; The operating system being responsible for controlling in legacy network then to become in SDN independently network operating system, is responsible for the adaptation of different business characteristic, and programming mode can be adopted to realize communication between network operating system and traffic performance and hardware device.
The SDN main body frame of current main-stream has the ONF(OpenNetworkingFoundation proposed from user perspective, open network foundation) SDN framework, from the ETSI(EuropeanTelecommunicationsStandardsInstitute that Virtual network operator angle proposes, european telecommunication markization association) NFV(NetworkFunctionsVirtualization, network function is virtual) framework and the OpenDayligh that combines proposition by industry giant Cisco, IBM, Microsoft etc. for specific implementation SDN framework increase income SDN project.On the SDN ideal basis that telecommunications industry proposes in the Internet industry, develop NFV, the theory of SDN has been incorporated into telecommunications industry.The main purpose of SDN and NFV is all wish that network can open, intelligent, software implementation.The angle of operator, SDN/NFV has defined several typical application scenarios at present.One is carry out tuning to backbone edges flow based on SDN, and link is originally all fixing, and equilibrium is mainly done by these different links by operator, and this causes network poor to congested perception, cannot guarantee real-time load balancing effect.SDN brings obvious benefit after introducing, and by the adjustment that becomes more meticulous of SDN controller, dredges flow in real time.
Virtual tenant network (OpenDaylightVirtualTenantNetwork is called for short VTN) is a kind of application providing many tenants virtual network based on SDN controller.The birth of VTN is intended to solve loaded down with trivial details installation system work and huge network system and propping up of operating cost and goes wrong.The special feature of VTN is logical abstraction platform.Logic platform is separated completely from physical platform, and user can need not know self-defined, on-premise network under physical network topology or bandwidth limited case.Secondly, VTN allows user's definition to be similar to traditional L2/L3 network of network.And once L2/L3 network designs successfully in VTN, this network can be mapped to underlying physical network automatically, SDN control protocol is then utilized to be configured respective switch.Logic platform in VTN can not only hide the complexity of lower floor's network, and can network resource administration better, decreases the reconfiguration time of network service and reduces network configuration error rate.
User defines a VTN, and user maps VTN to physical network, and this physical network can enable network service according to VTN definition.And along with the definition of VTN, L2/3 layer transfer function and the flow control function (filter and be redirected) based on stream will be implemented.
Along with the abstract of network, VTN can pass through multiple SDN controller configuration virtual network, provides very high elastomeric network system.VTN can be created in each SDN controller.If user wants to manage multiple VTNs in a strategy, these VTNs can be integrated in a single VTN.As case row, this function will be deployed to many data center environment, even if these data centers separate geographically, and controlled by different controllers, pure strategy virtual network still can be realized by VTN.
Two assembly: VTNManager and VTNCoordinator are mainly divided in VTN project.Wherein VTNManager is a plug-in unit of OpenDaylight controller, provides the interface of a REST, to create, upgrade or to delete VTN assembly; VTNCoordinator is then one provides REST interface to make user use the virtualized applications of VTN, the enforcement that it and VTNManager plug-in unit collaborative work completing user configure, and also has the ability of multi-controller establishment.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide the differentiation VTN implementation method based on price in a kind of SDN framework, the method comprises the steps:
1) physical means used by network communication mode is abstract turns to the VTN with different qualities;
2) according to physical characteristic and the operating mechanism of VTN, build quantitative model, quantize its service quality and use cost;
3) VTN after quantification is mapped as the service of differentiation, and is encapsulated as API, for upper strata SDN calling service;
4) communication protocol of physical equipment set in VTN consulted by VTN controller, and according to the real-time status of upper strata SDN calling interface loaded with traffic, the protocol mode of physical equipment set in coordinated management VTN and operation conditions.
Further, described network communication mode be comprise all in communication network can the set of Internet resources of interactive information and data.
Further, described physical means is the set that can realize hardware system in the mutual all-network resource of information and date and module, this gathers the FM module, AM module, bluetooth module, the WIFI module that comprise in electronics category, the express delivery means in logistics category.
Further, described quantitative model is the characteristic according to VTN, and use measurement to define to abstract attribute, what obtain describes the VTN model that can call.
Further, the characteristic of described VTN is the set by the service quality of heterogeneous networks means of communication and cost abstract, comprises time delay/throughput/reliability/use cost/communication range/equipment power dissipation/concurrent quantity/data flow direction that information is transmitted in a network.
Further, described API is to provide the calling service interface that SDN controller carries out allocation schedule, and the business demand of SDN is converted to the configuration to VTN.
The present invention adopts VTN building method that user just without the need to the physical means being concerned about bottom can be carried out selecting to VTN according to business and combine.The present invention can by lower from existing data communication means is integrated, take out the visible VTN interface of user, the AP services I that user can be provided by SDN is rely on to select to coordinate most economical rational VTN compound mode to meet the demand of subscriber data traffic with price.Utilize this invention can solve following problem:
1) in legacy network, because business and networked communication resource are tightly coupled relations, the analytical method of people to service feature parameter mostly adopts the mapping mode of " settling at one go ", i.e. direct relevant parameter business demand be mapped as on the network equipment, as the MTU, data flow consistency algorithm (TrafficConformanceAlgorithm) etc. of link.This mode exacerbates being coupled between business with Internet resources: the service parameter that this mode provides on the one hand is filled with the unfamiliar network specialty term of user, is unfavorable for opening and the exploitation of business; On the other hand, user cannot reasonably combine and cutting Internet resources according to the actual requirements, can not the coordination network communication resource effectively economically.
2) business and concrete physical means are coupled, be unfavorable for the respective evolution of business and network communications approach, such as, when network updates, the existence of this coupling may cause the situation that the business that affects normally is run because of the inside actualizing technology difference of newborn communication mode.
Based on the differentiation VTN implementation method of price in a kind of SDN framework provided by the invention, used by real system and proved practicable, met new generation network towards " the Internet+" to the demand of Network differentiated service.
Accompanying drawing explanation
Fig. 1 is the hierarchical mode of the differentiation VTN based on price;
Fig. 2 is the block architecture diagram of the differentiation VTN based on price;
Fig. 3 is the schematic diagram based on the differentiation VTN implementation method flow process of price in SDN framework.
Embodiment
Based on the differentiation VTN implementation method of price in a kind of SDN framework provided by the invention, comprise the steps:
1) physical means used by network communication mode is abstract turns to the VTN with different qualities;
Described network communication mode be comprise all in communication network can the set of Internet resources of interactive information and data.Described physical means is the set that can realize hardware system in the mutual all-network resource of information and date and module, and this gathers the FM module, AM module, bluetooth module, the WIFI module that comprise in electronics category, the express delivery means in logistics category.The characteristic of described VTN is the set by the service quality of heterogeneous networks means of communication and cost abstract, comprises time delay/throughput/reliability/use cost/communication range/equipment power dissipation/concurrent quantity/data flow direction that information is transmitted in a network.
2) according to physical characteristic and the operating mechanism of VTN, build quantitative model, quantize its service quality and use cost; Described quantitative model is the characteristic according to VTN, and use measurement to define to abstract attribute, what obtain describes the VTN model that can call.
3) VTN after quantification is mapped as the service of differentiation, and is encapsulated as API, for upper strata SDN calling service; Described API is to provide the calling service interface that SDN controller carries out allocation schedule, and the business demand of SDN is converted to the configuration to VTN.
4) communication protocol of physical equipment set in VTN consulted by VTN controller, and according to the real-time status of upper strata SDN calling interface loaded with traffic, the protocol mode of physical equipment set in coordinated management VTN and operation conditions.
Embodiment
Understand for the ease of persons skilled in the art and realize the present invention, now further illustrating technical scheme of the present invention by reference to the accompanying drawings, provide a kind of embodiment of the method for the invention.Be that what to present to user be commercial a, abstract, can provide differentiated service, modular VTN network based on a core concept of the differentiation VTN implementation method of price in SDN framework, this VTN itself is the set that in specific region, certain can realize data communication, the tuneable physical module of ALARA Principle.Another represents it is wish that user coordinates the lower layer interface of business needed for oneself by the combination of the price attribute of VTN, thus selects suitable service according to the different economical and efficients of price and demand.
Fig. 1 is the hierarchical mode figure of the embodiment of the present invention, SDN is divided into operation layer, SDN application layer, virtual tenant network layer, physical layer.Operation layer comprises the set of user's all demands in data communication and data transport service; SDN application layer can provide visible, controllable SDN to apply for upper-layer service layer, user can should be used for selecting by SDN the solution of combination self-demand, and can determine required service plan with the price by SDN computation gained further for leading; Virtual tenant network layer, i.e. VTN layer, be responsible for the api interface that upper strata SDN application layer provides ALARA Principle to dispatch, the equipment during the VTN controlling the in real time cluster tool abstract of lower floor's physical layer with clear and definite service quality and price character simultaneously gathers; Physical layer is the hardware system of all resources and the set of module that can realize interactive information and data, and this gathers the FM module, AM module, bluetooth module, WIFI module, the intercom module that comprise in electronics category, the express delivery means in logistics category.Fig. 2 is the SDN block architecture diagram that the present invention relies on.In the physical layer of SDN framework, homogeneous networks cluster tool can be abstracted into in a VTN, in VTN, use software to define price, calculate the cost needed for current service; In the key-course of SDN framework, VTN controller can carry out coordinated scheduling to the VTN of lower floor, the equipment in real time in control VTN; On the application layer, SDN application can control different VTN networks by api interface.
Below for telephone communication service, the realization of the differentiation VTN implementation method based on price in SDN framework is described, as shown in Figure 3.The data communication needs of user to self is concluded, and specifically describes out the requirement of required business, and the description of reference business and content requirement, initiate telephone communication service request to SDN application layer.After SDN application layer receives service request, service quality required by business, comprise the requirement to features such as time delay/throughput/reliability/use cost/communication range/equipment power dissipation/concurrent quantity/data flow direction that information is transmitted in a network, select the set of several api interfaces that can meet the demands or api interface to form different service plans, and calculate price.User applies according to SDN the price that provides and service quality determines concrete service plan and service price, then the application in SDN application layer will change into the selection of respective fictional tenant network API to the selection of service and call, issue the order of calling to the set of concrete api interface or api interface, call the virtual tenant network that api interface is corresponding.Controlled running, the coordination of lower floor's physical layer equipment after VTN controller receives call instruction in virtual tenant network by physical interface, and determine and arbitrate the communication protocol in region between all physical equipments and physical module.Physical layer block in this VTN, comprises the FM module in electronics category, AM module, bluetooth module, WIFI module; Express delivery means in logistics category, after receiving call request, according to certain method with realizes interconnecting with the physical module in region, transmit data and information.If the business demand of user is in the scope of 200 meters and carries out the information of low time delay, duplex between other unique users, now SDN application calculates feasible one or more schemes by certain computation model, as called the VTN etc. at FM module place VTN, cellular network module place, and corresponding price is provided to select to user.The now VTN at the user FM module place of selecting price relatively low, SDN application just provides and can issue call instruction to the api interface of this VTN network.Api interface receives orders, and obtain the information such as position and identity of carrying out communicating pair, then VTN controller is according to the concrete physics FM module used during these information determination intercommunications.When VTN layer forms corresponding agreement, after communications band, code check, FM module just can use the FM module interactive information of electromagnetic wave and opposite end.The communication of low time delay, low cost, duplex mode just can be carried out between user with a region.
Based on above-mentioned understanding, the differentiation VTN implementation method based on price in SDN framework is expressed as follows:
In described step 1, as shown in Figure 3, the communication equipment of physical layer is carried out modularization according to the difference of communication mode, as being divided into FM module, bluetooth module, express delivery module etc., then will (according to the communication distance difference of different physical module, scope be different in region at this moment with in region, the zoning of namely different modules is different) physics module collection of the same race is in specific VTN, and provide physical interface to the VTN controller (this VTN controller can be module of the same race also can be disparate modules or other communication equipments) in VTN, now just complete the abstract of physical module.
In described step 2, as shown in Figure 3, according to physical characteristic and the operating mechanism of the physical module comprised in the middle of VTN, a standard quantized can be negotiated, according to this standard, VTN can be provided time delay/throughput/reliability/use cost/communication range/equipment power dissipation/concurrent quantity/data flow direction etc. that the service quality of service is transmitted in a network as information to quantize, and calculate price reference value and the use cost of this service.
In described step 3, as shown in Figure 3, the carrying out practically mode of all physical layer equipments can be shielded, by the control method of the VTN in step 2 and function, add that service quality and pricing information are packaged into an api interface, as functional form, be supplied to the SDN application on upper strata, now VTN just can provide the service with different qualities.API seen by SDN application layer is exactly the calling interface of the VTN with differentiated service.SDN application forms different service plans according to business demand, determines the API needing to call.Then to be communicated with VTN real-time performance by this api interface, import user profile into VTN and call VTN.
In described step 4, as shown in Figure 3, when operation layer issuing service information, when VTN layer starts to carry concrete business, VTN controller in VTN network is responsible for communication protocol and the communication mode of consulting all physical modules in VTN, the function situation of real-time monitors physical equipment, according to environmental change and loading condition accounting price and service quality, and is supplied to upper strata SDN by api interface and applies.
According to above-mentioned business configuration process, when user proposes a kind of business demand to router, SDN application according to the service quality of VTN and the service provider case of price situation dynamic conditioning oneself and cost calculation formula, thus obtains a virtual communication network that can meet this business.
Although depict the present invention by embodiment, those of ordinary skill in the art know, the present invention has many distortion and change and do not depart from spirit of the present invention, and the claim appended by wishing comprises these distortion and change and do not depart from spirit of the present invention.
Claims (6)
1. in SDN framework based on a differentiation VTN implementation method for price, it is characterized in that: the method comprises the steps:
1) physical means used by network communication mode is abstract turns to the VTN with different qualities;
2) according to physical characteristic and the operating mechanism of VTN, build quantitative model, quantize its service quality and use cost;
3) VTN after quantification is mapped as the service of differentiation, and is encapsulated as API, for upper strata SDN calling service;
4) communication protocol of physical equipment set in VTN consulted by VTN controller, and according to the real-time status of upper strata SDN calling interface loaded with traffic, the protocol mode of physical equipment set in coordinated management VTN and operation conditions.
2. in a kind of SDN framework according to claim 1 based on the differentiation VTN implementation method of price, it is characterized in that: described network communication mode be comprise all in communication network can the set of Internet resources of interactive information and data.
3. in a kind of SDN framework according to claim 1 based on the differentiation VTN implementation method of price, it is characterized in that: described physical means is the set that can realize hardware system in the mutual all-network resource of information and date and module, this gathers the FM module, AM module, bluetooth module, WIFI module, the intercom module that comprise in electronics category, the express delivery means in logistics category.
4. in a kind of SDN framework according to claim 1 based on the differentiation VTN implementation method of price, it is characterized in that: described quantitative model is the characteristic according to VTN, use measurement to define to abstract attribute, what obtain describes the VTN model that can call.
5. in a kind of SDN framework according to claim 1 based on the differentiation VTN implementation method of price, it is characterized in that: the characteristic of described VTN is the set by the service quality of heterogeneous networks means of communication and cost abstract, comprise time delay/throughput/reliability/use cost/communication range/equipment power dissipation/concurrent quantity/data flow direction that information is transmitted in a network.
6. in a kind of SDN framework according to claim 1 based on the differentiation VTN implementation method of price, it is characterized in that: described API is to provide the calling service interface that SDN controller carries out allocation schedule, and the business demand of SDN is converted to the configuration to VTN.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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