CN106411664A - Metropolitan area network system - Google Patents
Metropolitan area network system Download PDFInfo
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- CN106411664A CN106411664A CN201610825842.XA CN201610825842A CN106411664A CN 106411664 A CN106411664 A CN 106411664A CN 201610825842 A CN201610825842 A CN 201610825842A CN 106411664 A CN106411664 A CN 106411664A
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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]
- H04L12/2852—Metropolitan area networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
An embodiment of the present invention provides a metropolitan area network system, relating to the technical field of communication. The metropolitan area network system can help improve service deployment efficiency and reduce the construction cost of network capacity expansion. The metropolitan area network comprises customer premise equipment (CPE), an optical access network connected with the CPE, at least one first white box switch connected with the optical access network, an internet data center (IDC) and a core router (CR) that are connected with the at least one first white box switch. The IDC comprises a software defined network (SDN) controller and multiple virtualized network functions (VNF). The CPE supports an OpenFlow protocol and is used for forwarding data between a user terminal and the optical access network under the control of the SDN controller. The at least one first white box switch is used for completing data forwarding among the IDC, the optical access network and the CR under the control of the SDN controller. The optical access network is used for accessing data of a user service to an optical network to transmit. The CR is used for forwarding the received data.
Description
Technical field
The present invention relates to communication technical field, more particularly, to a kind of metropolitan area network system.
Background technology
Metropolitan Area Network (MAN) is also referred to as broadband metropolitan area network or IP Metropolitan Area Network (MAN), is the data of all kinds of offer broadband access covering whole city
Communication network.At present, the construction of Metropolitan Area Network (MAN) is divided into three layers, core layer, key-course and Access Layer.Wherein, core layer mainly includes core
Heart router (Core Router, CR), outlet device and backbone network as Metropolitan Area Network (MAN) interconnect.Key-course includes broadband network
Gateway control (Broadband Network Gateway, BNG) equipment, for carrying out locally to the flow of customer service
Route processing or send after treatment to CR, to provide the user service.Access Layer includes all kinds of optical access devices, with
Family terminal device (Customer Premise Equipment, CPE) connects, and carries out protocol processes by receiving through CPE
Data afterwards is transmitted.
However, due in existing network BNG equipment and CPE be the special equipment of software and hardware integration, and the mark of each producer
Accurate and disunity, leads to the BNG equipment producing and CPE to there may be different, therefore, business that each operator provides with
Hardware depth is bound.With gradually increasing of customer service demand, due to being limited by special equipment, lead to opening of new business
Send out and deployment is less efficient, and the construction cost of the network capacity extension is high.
Content of the invention
Embodiments of the invention provide a kind of metropolitan area network system, it is possible to increase the deployment efficiency of business, reduce the network capacity extension
Construction cost.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
In a first aspect, the embodiment of the present invention provides a kind of metropolitan area network system, including：Customer terminal equipment CPE and this CPE
At least one the first whitepack switch that is connected with this optical access network of optical access network connecting, and with this at least one first
Internet data center (Internet Data Center, IDC) and CR that whitepack switch connects；This IDC includes software definition
Network (Software Defined Network, SDN) controller and multiple virtual network function (Virtualised
Network Function, VNF), this SDN controller is for this, at least one the first whitepack switch and this CPE are controlled
System, the plurality of VNF include for realize access function VNF, for realizing the VNF of subscriber management function, be used for realizing address
The VNF of management function, for realizing route computing function VNF, for realize authentication and accounting function VNF, for realize stream
The VNF of the amount monitoring function and VNF for implementation strategy management function；This CPE supports OpenFlow agreement, at this
Under the control of SDN controller, the data between user terminal and this optical access network is forwarded；This at least one first whitepack
Switch is used for completing the data forwarding between this IDC, this optical access network and this CR under the control of this SDN controller；Should
Optical access network is used for the data access optical-fiber network transmission of customer service；This CR is used for the data receiving is forwarded.
Metropolitan area network system provided in an embodiment of the present invention, can be embodied as user's industry by the combination of the VNF of types of functionality
The service that business provides, improves service deployment efficiency so that the realization of all kinds of business in Metropolitan Area Network (MAN) is no longer dependent on special equipment.
The VNF only needing to increase corresponding function when network heavy duty can reach dilatation, thus reducing the expensive equipment cost of network, subtracts
The construction cost of few network capacity extension；The VNF passing through to discharge corresponding function when network underloading can reduce resource occupation.
Optionally, this CPE is additionally operable to carry out speed limit to the flow of this customer service under the control of this SDN controller.
Optionally, this IDC also includes the second whitepack exchange group and multiple virtual switch, and the plurality of VNF and this SDN is controlled
Device processed is connected with this second whitepack exchange group by the plurality of virtual switch, this second whitepack exchange group with this at least one
Individual first whitepack switch connects, and this second whitepack exchange group and the plurality of virtual switch are used in this SDN controller
Under control, the data of transmission in this IDC is forwarded.
Optionally, the plurality of VNF also includes the VNF for realizing value-added service.
Optionally, this CPE, this optical access network, this at least one the first whitepack switch and this IDC adopt IPOE to access
Mode accesses to customer service.
By this optional mode so that user can adopt same IPoE account when applying for different business, to reduce
Account quantity, thus and reduce the complexity of account control and management.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below by use required in embodiment
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a kind of metropolitan area network system schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of IDC schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.
SDN is a kind of new network of Emulex network innovation framework, is a kind of implementation of network virtualization, its core technology is to pass through
The chain of command of the network equipment and data surface being separated, thus realizing the flexible control of network traffics, so that network is become more
Intelligence.And network function virtualization (Network Function Virtualization, NFV) technology is a kind of in general thing
The technology of operational network function on reason equipment.Can be by the virtualization of function of special network element, and in common apparatus by NFV technology
Upper operation, makes common apparatus realize the function of special network element, thus avoiding network function and apparatus bound, improves the deployment of business
Efficiency.
Based on SDN technology and NFV technology, the embodiment of the present invention provides a kind of metropolitan area network system, it is possible to increase the portion of business
Administration's efficiency, reduces equipment complexity, reduces network construction cost.
It should be noted that the term " system " being related to herein and " network " are herein often made by interchangeable
With.Term " and ", only a kind of incidence relation of description affiliated partner, represents there may be three kinds of relations, for example, A and B,
Can represent：, there are A and B, these three situations of individualism B in individualism A simultaneously.In addition, character "/" herein, general table
Show forward-backward correlation to as if a kind of relation of "or".
When the embodiment of the present invention refers to ordinal numbers such as " first ", " second ", " the 3rd " or " the 4th ", except in not according to
The hereafter meaning of its certain order of representation, it is appreciated that be only that differentiation is used.Additionally, term " comprising " and " having "
And their any deformation are it is intended that cover non-exclusive comprising.
As shown in figure 1, being a kind of metropolitan area network system provided in an embodiment of the present invention, including：The light that CPE is connected with this CPE
At least one first whitepack switch that access network is connected with this optical access network and this at least one first whitepack switch connect
IDC and CR connecing.
Specifically, IDC provided in an embodiment of the present invention, including SDN controller and multiple VNF.It is right that this SDN controller is used for
This at least one first whitepack switch and this CPE are controlled.The plurality of VNF include for realize access function VNF, use
In realize subscriber management function VNF, for realize address management function VNF, for realizing route computing function VNF,
For realizing the VNF of authentication and accounting function, for realizing the VNF of flow monitoring function and being used for implementation strategy management function
VNF.
Exemplary, in Metropolitan Area Network (MAN) provided in an embodiment of the present invention, all VNF for realizing access function in IDC
It is properly termed as AM access module.Exemplary, in existing network by the IPoE that BNG equipment is realized access packet parsing, IPoE protocol processes,
The functions such as IP address acquisition, the acquisition of domain name system (Domain Name System, DNS), bandwidth resources acquisition, domain management,
The IPoE client functionality realized by existing CPE, network address translation (Network Address Translation, NAT)
Etc. function, can be realized by the VNF in this AM access module.
In this IDC, all VNF for realizing subscriber management function are properly termed as user management module, user management module
Can be specifically for being managed to the information of user, for example, to information such as the user name of user, password, business access rights
It is managed, thus the access for user and certification provide information foundation.
In this IDC, all VNF for realizing address management function are properly termed as address management module, address management module
Specifically can be used for the IP address of user being allocated and managing, to guarantee that IP address resource obtains reasonable employment.For example,
This address management module can complete the IP address distribution of wide band access user and enterprise customer and discharge, public network address segment port
Distribution and release, the function such as the calculating of the utilization rate of address pool and alarm, can also according to region distribution with address field ground
Location, thinks that route aggregation carries out place mat.
In this IDC, all VNF for realizing route computing function are properly termed as path calculation module, exemplary, should
Path calculation module can be used for the path computing under the path computing of the uplink traffic to user, load sharing condition, all kinds of
The path computing design in tunnel, the path computing of all kinds of value-added services, and the calculating of Routing Protocol interaction path to CR etc..
In this IDC, all VNF for realizing authentication and accounting function are properly termed as authentication and accounting module, this authentication and accounting mould
Block specifically can be used for completing the certification of wide band access user, mandate, billing function, and this authentication and accounting module can also be complete simultaneously
Become user's dynamic authorization and dynamic bandwidth adjustment it is also possible to complete related value-added service authorizes charging.
In this IDC, all VNF for realizing flow monitoring function are properly termed as flow monitoring module, exemplary, should
Flow monitoring module can be used for the flow monitoring each accessing user, monitors each bar link flow situation, monitors each VNF's
Traffic conditions, the flow load of each whitepack switch in monitoring network, monitoring server, the traffic conditions of virtual switch
Deng.
In this IDC, all VNF for implementation strategy management function are properly termed as policy management module, policy management module
Specifically can be used for NAT strategy, firewall policy, deep-packet detection strategy, load balancing, qos policy are managed.
For example, in existing network by BNG, existing CPE or load-balanced server realize load-balancing function, NAT44 function, fire prevention
Wall function, deep-packet detection function, qos policy etc., can be realized by this policy management module.
It is understood that in Metropolitan Area Network (MAN) provided in an embodiment of the present invention, including the VNF realizing types of functionality so that
In Metropolitan Area Network (MAN), customer service is no longer based on special equipment and includes BNG and CPE to realize, thus reducing by by existing network
The Various types of data processing function of CPE, BNG equipment, and the function of other special network elements virtualized, and to virtualization after
Function is reconstructed, and is divided into new functional module, and IDC can provide the user service by the combination of the VNF of types of functionality,
Make the deployment of new business more flexible.
In one example, with the growth of user's request, when Metropolitan Area Network (MAN) needs to realize some value-added services, if above-mentioned
Functional module cannot realize these value-added services by way of business chain, then can also increase new functional module to realize
These value-added services, also include the VNF for realizing value-added service in the multiple VNF in this IDC.
Further, CPE provided in an embodiment of the present invention supports OpenFlow agreement, can be in the control of SDN controller
Under the data between user terminal and this optical access network is forwarded.
What deserves to be explained is, CPE provided in an embodiment of the present invention need not carry out protocol processes and complicated configuration management work(,
Such as routing function of nat feature, firewall functionality and three layer protocols etc., this CPE can be to the data receiving, according to connecing
Receive the different business of port identification, such as broadband access network business, video traffic and person's speech business etc., then controlled according to SDN
The flow table that device processed issues, by the corresponding ports of the data is activation receiving to optical access network, with by Optical Fiber Transmission send to
First whitepack switch.Compared to existing CPE, CPE provided in an embodiment of the present invention need not support three layer protocols on hardware,
The configuration of complexity need not be carried out, thus greatly reducing the complexity of CPE.
In one example, CPE provided in an embodiment of the present invention can be also used under the control of SDN controller to user
The flow of business carries out speed limit.For example, SDN controller pass through OpenFlow agreement or network configuration (netconf) agreement to
CPE sends speed limiting attribute information, so that CPE carries out speed limit according to this speed limiting attribute information to the flow of specified customer service.
This at least one first whitepack switch is used for completing IDC, optical access network under the control of SDN controller and is somebody's turn to do
Data forwarding between CR.
It is understood that whitepack switch is a kind of physical switches hardware, by configuring corresponding software function, make
It realizes corresponding forwarding capability.For example, by configuration on whitepack switch and router identical software systems, you can make
Obtain the function that this whitepack switch realizes router；By configuration on whitepack switch and three-tier switch identical software system
System, you can make this whitepack switch realize function of three-tier switch etc..Set compared to having disparate networks exchange in existing network
Standby, networking cost can be reduced using whitepack switch, realize the flexible configuration of forwarding capability.
First whitepack switch provided in an embodiment of the present invention is a kind of whitepack switch supporting OpenFlow agreement, energy
Enough complete data forwarding function under the control of SDN controller, for example, this first whitepack switch can be in SDN controller
Under control in realizing existing network the function of convergence switch it is also possible to realize the forwarding capability of BNG equipment in existing network.
This optical access network is used for the data access optical-fiber network transmission of customer service.Exemplary, this optical access network is permissible
For EPON (Passive Optical Network, PON), mainly include ONT Optical Network Terminal (Optical network
Terminal, ONT)/optical node (Optical Network Unit, ONU), optical line terminal (optical line
Terminal, OLT).Wherein, ONT/ONU is connected with this CPE and OLT, and OLT is connected with the first whitepack switch.PON is user
Data provides intelligent acess service so that user data can transmit in optical-fiber network high speed.Optionally, this optical access network also may be used
Think active optical network (Active Optical Network, AON).In this regard, the embodiment of the present invention is not limited.
CR is used for the data receiving is forwarded.Specifically, in embodiments of the present invention, can to receive first white for CR
The data that box switch sends, and by this data forwarding to backbone network it is also possible to by the data is activation of Backbone Transport to first
Whitepack switch, with to IDC process or white by first by the data forwarding of Backbone Transport by the first whitepack switch
The data of Backbone Transport is forwarded directly to optical access network and is transmitted by box switch.It is understood that Metropolitan Area Network (MAN) passes through
CR realizes the connection with backbone network, and CR can complete the data forwarding of high speed between Metropolitan Area Network (MAN) and backbone network, is going out of Metropolitan Area Network (MAN)
Jaws equipment.
Metropolitan area network system provided in an embodiment of the present invention, can be embodied as user's industry by the combination of the VNF of types of functionality
The service that business provides, improves service deployment efficiency so that the realization of all kinds of business is no longer dependent on special equipment.When network heavy duty
When only need to increase the VNF of corresponding function and can reach dilatation, thus reducing the expensive equipment cost of network；When network underloading
Resource occupation can be reduced by discharging the VNF of corresponding function.
Further, as shown in Fig. 2 IDC provided in an embodiment of the present invention can be by one or more data
The heart is constituted, and each data center can include part VNF in above-mentioned multiple VNF, and each VNF can be at least one virtual machine
(Virtual Machine, VM) is upper to be run.
This IDC can also include the second whitepack exchange group and multiple virtual switch, and the plurality of VNF and this SDN controls
Device is connected with this second whitepack exchange group by the plurality of virtual switch, this second whitepack exchange group with this at least one
First whitepack switch connects, and wherein, each the second whitepack switch in this second whitepack exchange group also can be supported
OpenFlow agreement, can forward to the data receiving according to the flow table that SDN controller issues.The plurality of virtual switch
Each virtual switch (Virtual Switch, vSwitch) in machine is that one kind is used for interconnecting VM, and VM is connected to thing
The software of reason network (i.e. the second whitepack switch) is realized, and the information being capable of between VM exchanges, and VM and physical network
Between information exchange.
In embodiments of the present invention, this second whitepack exchange group and the plurality of virtual switch can control in this SDN
Under the control of device, the data of transmission in this IDC is forwarded.Optionally, as shown in Fig. 2 this IDC also includes including
Synergist and composer, this synergist can be used for working in coordination with the virtual resource of VNF in this IDC.If this IDC includes multiple SDN controls
During device processed, this synergist can be used for working in coordination with the plurality of SDN controller, so that the plurality of SDN controller can pass through phase
Mutually coordinate, complete the control to the CPE in this Metropolitan Area Network (MAN), whitepack switch and VFN.
This composer can be used for the business demand according to user, carries out layout to the multiple VNF in this IDC, determines energy
Enough realize this business demand VNF combined strategy, and this VNF combined strategy is sent to path calculation module, so that this path
Computing module combines the policy calculation forward-path such as Routing Protocol, load balancing, by the multiple VNF in this VNF combined strategy,
By the forward-path series connection of the second whitepack exchange group and multiple virtual switch, form business chain.This path computing mould
Block by the path of calculating is sent to SDN controller so that SDN controller generate corresponding flow table, with control CPE, first
Whitepack switch, the second whitepack switch and virtual switch will be in data input business chain corresponding with this business.
In one example, CPE provided in an embodiment of the present invention, optical access network, at least one first whitepack switch with
And IDC is accessed to customer service using IPOE access way.
Generally, a user, when applying for different business, may be identified for existing CPE and used using different accounts
The different business of family application, for example, apply for during wideband switch-in business using point-to-point protocol (the Point to based on Ethernet
Point Protocol over Ethernet, PPPoE) account, adopt IPoE agreement account during log on television services.And
In this application, PPPoE access way is replaced by IPoE access way so that user all can adopt when applying for different business
One IPoE account, and CPE provided in an embodiment of the present invention can identify different business by access interface, thus decreasing
Account quantity, and reduce the complexity of account control and management, and decrease the connection number between equipment.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be defined by scope of the claims.
Claims (5)
1. a kind of metropolitan area network system is it is characterised in that include：Optical access network that customer terminal equipment CPE is connected with described CPE,
At least one the first whitepack switch being connected with described optical access network, and with least one first whitepack switch described even
The internet data center IDC connecing and core router CR；
Described IDC includes software defined network SDN controller and multiple virtual network function VNF, and it is right that described SDN controller is used for
At least one first whitepack switch described and described CPE are controlled, and the plurality of VNF is included for realizing access function
VNF, for realize subscriber management function VNF, for realize address management function VNF, be used for realizing route computing function
VNF, for realize authentication and accounting function VNF, for realize flow monitoring function VNF and for implementation strategy management
The VNF of function；
Described CPE supports OpenFlow agreement, under the control of described SDN controller to user terminal and described soft exchange
Data between net is forwarded；
At least one first whitepack switch described is for completing described IDC under the control of described SDN controller, described light connects
Data forwarding between networking and described CR；
Described optical access network is used for the data access optical-fiber network transmission of customer service；
Described CR is used for the data receiving is forwarded.
2. metropolitan area network system according to claim 1 is it is characterised in that described CPE is additionally operable in described SDN controller
Under control, speed limit is carried out to the flow of described customer service.
3. metropolitan area network system according to claim 1 it is characterised in that
Described IDC also includes the second whitepack exchange group and multiple virtual switch, the plurality of VNF and described SDN controller
Be connected with described second whitepack exchange group by the plurality of virtual switch, described second whitepack exchange group with described extremely
A few first whitepack switch connects, and described second whitepack exchange group and the plurality of virtual switch are used for described
Under the control of SDN controller, the data of transmission in described IDC is forwarded.
4. metropolitan area network system according to claim 1 is it is characterised in that the plurality of VNF is also included for realizing increment
The VNF of business.
5. the metropolitan area network system according to any one of claim 1-4 it is characterised in that
Described CPE, described optical access network, at least one first whitepack switch described and described IDC adopt IPOE access side
Formula accesses to customer service.
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| US11533777B2 (en) | 2018-06-29 | 2022-12-20 | At&T Intellectual Property I, L.P. | Cell site architecture that supports 5G and legacy protocols |
| US10728826B2 (en) | 2018-07-02 | 2020-07-28 | At&T Intellectual Property I, L.P. | Cell site routing based on latency |
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| CN110830307A (en) * | 2019-11-21 | 2020-02-21 | 中盈优创资讯科技有限公司 | Network capacity expansion method and device |
| CN112511483A (en) * | 2020-03-02 | 2021-03-16 | 中兴通讯股份有限公司 | Data forwarding method, equipment and storage medium |
| CN114499735A (en) * | 2020-11-12 | 2022-05-13 | 中国电信股份有限公司 | Service transmission method, system and computer readable storage medium |
| WO2022100392A1 (en) * | 2020-11-12 | 2022-05-19 | 中国电信股份有限公司 | Service transmission method, system, and computer-readable storage medium |
| CN114499735B (en) * | 2020-11-12 | 2024-02-13 | 中国电信股份有限公司 | Service transmission method, system and computer readable storage medium |
| CN112615943A (en) * | 2020-12-11 | 2021-04-06 | 深圳金信诺高新技术股份有限公司 | Address translation method and system for multi-CPE (customer premise equipment) test |
| CN112615749B (en) * | 2020-12-28 | 2023-04-18 | 广州西麦科技股份有限公司 | Flow scheduling system and method based on VXLAN and OpenFlow |
| CN112615749A (en) * | 2020-12-28 | 2021-04-06 | 广州西麦科技股份有限公司 | Flow scheduling system and method based on VXLAN and OpenFlow |
| CN113055766B (en) * | 2021-03-19 | 2022-06-03 | 中国联合网络通信集团有限公司 | End-to-end service processing system and method |
| CN113055766A (en) * | 2021-03-19 | 2021-06-29 | 中国联合网络通信集团有限公司 | End-to-end service processing system and method |
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