CN106161053A - A kind of SDN controller QoS manages system and method - Google Patents
A kind of SDN controller QoS manages system and method Download PDFInfo
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Abstract
The present invention relates to a kind of SDN controller QoS and manage system, including: network status data library module, application message extraction module, QoS routing calculation module, network topology management module, Link State discovery module and stream table issue module automatically；Network topology management module generates, management network topology information；Link State discovery module obtains the Link State of datum plane；Network status data library module preserves the network topology information and link-state information obtained from Topology Management module and Link State discovery module；Application message extraction module extracts packet information, and packet information is sent to QoS routing calculation module；The packet information that QoS routing calculation module inputs according to the network state information extracted from network status data library module and application message extraction module, calculates data flow transmission route；Stream table issues module automatically according to by data flow path information, calculating generation correspondence stream table.
Description
Technical field
The present invention relates to technical field of the computer network, particularly to a kind of SDN controller QoS management system and side
Method.
Background technology
Along with cloud computing and the development of big data correlation techniques, new business is to the tradition with IP technology as core
Network proposes increasing challenge.The either frequent migration of virtual machine in cloud computing, or distributed big data
In calculating all the time in the mass data carried out alternately, the QoS mass of network is all proposed higher by novel network service
Requirement.In network architecture with IP as core, no matter from flow scale, or from functional interface, all
It is difficult to the demand meeting current Network to end-to-end quality of service, and numerous QoS that researcher proposes route mould
Type, is difficult to dispose in existing network.
Network data plane forwarding capability is separated by SDN software defined network with controlling function.SDN is to net
The manager of network and user provide programmable network interface, realize the management to controller；Pass through simultaneously
OpenFlow agreement, it is achieved controller is mutual with the information of network forwarding equipment.SDN is by controlling and Forwarding plane
Decoupling, controller can obtain the whole network node and link view, by OpenFlow protocol definition connect control
The forwarding behavior of all switches in territory, it is possible to preferably management and guiding data traffic.Above feature, at SDN
The QoS management realizing application data stream amount in network provides the foundation.
Although prior art also having QoS based on SDN controller manage System and method for, but also exist and only examine
Consider network state, be unable to reflect in real time the defect of application packet feature, i.e. prior art cannot be in conjunction with network
State and application feature, cause can not carrying out QoS management more finely, exactly.
Summary of the invention
It is an object of the invention to the defect overcoming existing QoS management existing for System and method for, thus provide one
Kind can real-time selection meet different application QoS feasible path QoS manage System and method for.
To achieve these goals, the invention provides a kind of SDN controller QoS and manage system, this system includes:
Network status data library module, application message extraction module, QoS routing calculation module, network topology management module,
Link State discovery module and stream table issue module automatically；Wherein,
Described network topology management module is used for generating, managing network topology information, obtained result quilt
It is transferred to described network status data library module；
Described Link State discovery module is for obtaining the Link State of datum plane, and obtained result is transmitted
To described network status data library module；
Described network status data library module is for preserving from described Topology Management module and described Link State
The network topology information of discovery module acquisition and link-state information；
Described application message extraction module extracts packet information, and described packet information is sent to described
QoS routing calculation module；Wherein, described packet information include packet source IP address, purpose IP address and
Application characteristic information；Described application characteristic information refers to the field letter of reflection application packet required service grade
Breath；
Described QoS routing calculation module is according to the network state letter extracted from described network status data library module
Breath and the packet information of described application message extraction module input, calculate data flow transmission route, obtained
Result be transferred to described stream table and automatically issue module；
Described stream table issues the data flow path information that module foundation is obtained by described QoS routing calculation module automatically,
Calculate and generate correspondence stream table, call the controller stream table that SDN controller carries and issue API, by described controller stream
Table issues API and completes stream table and issue.
In technique scheme, described QoS routing calculation module farther includes following functions:
Current network state information is asked, including network topology structure and link to described network status data library module
Status information；
Receive described application message extraction module send packet information, including source IP address, purpose IP address with
And application characteristic information；
According to described application characteristic information, search predefined application characteristic information and QoS grade mapping table, really
The QoS grade of given data bag；
QoS grade and current network state information according to packet do path computing, obtain feasible path information；
Feasible path information is issued to described stream table and automatically issues module.
In technique scheme, described QoS routing calculation module have employed when doing path computing affined
Short path priority algorithm.
Present invention also offers the QoS management method realized based on described SDN controller QoS management system,
Including:
Step 1), after SDN datum plane switch receives the application packet not mating stream table, by these data
Wrap and upload to control plane SDN controller by OpenFlow protocol channel；
Step 2), application message extraction module receive the above packet not mating stream table, resolve packet header,
Obtain the information including packet source IP address, purpose IP address and application characteristic information, and will believe above
Breath is sent to QoS routing calculation module；
Step 3), QoS routing calculation module to network status data library module ask current network state information, bag
Include current network topology structure, link-state information；
Step 4), according to step 2) obtained by application characteristic information, search QoS routing calculation module safeguard
Application characteristic information and QoS grade mapping table, determine the QoS grade that this packet correspondence is applied；Wherein,
Described characteristic information, with QoS grade mapping table, have recorded default application characteristic information and QoS grade
Corresponding relation；Described QoS grade illustrates QoS and the physical network Actual path chain of application data stream demand
The QoS that road disclosure satisfy that, comprises: path delay, delay jitter, available bandwidth information, and above-mentioned one
Or multinomial combination；
Step 5), according to step 3) obtained by network state information, and step 4) the QoS grade that determines
Requirement, calculates shortest path feasible between packet source IP address, purpose IP address；
Step 6) if according to step 5) shortest path that obtains has a plurality of, then select the path that jumping figure is minimum,
Path selection terminates；Otherwise, if the feasible path that cannot generate between source data packet, purpose IP address, then road
Footpath selects unsuccessfully, and packet will be dropped.
In technique scheme, described step 5) farther include:
Step 5-1), described QoS routing calculation module to network status data library module ask network state information,
Including current network topology and link running status；
Step 5-2), described QoS routing calculation module based on above-mentioned network available topologies, according to application QoS
The network state that grade determines limits, and punctures all links not meeting qos requirement.
In technique scheme, described step 6) also include:
If being met the feasible path of QoS level requirements, then this routing information is issued to described stream table automatic
Issue module；Otherwise, terminating router-level topology process, packet will be dropped.
It is an advantage of the current invention that:
The SDN controller QoS management System and method for of the present invention can meet different application QoS by real-time selection
Feasible path, it is easy to management QoS Service situation, promotes the service quality to network application.
Accompanying drawing explanation
Fig. 1 is the structural representation of the SDN controller QoS management system of the present invention；
Fig. 2 is the flow chart of the SDN controller QoS management method of the present invention.
Detailed description of the invention
In conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1, the SDN controller QoS management system of the present invention is positioned in the controller that SDN controls plane,
This system includes that nucleus module and supplementary module, described nucleus module include network status data library module, application letter
Breath extraction module and QoS routing calculation module；Described supplementary module includes network topology management module, Link State
Discovery module and stream table issue module automatically.
Described network topology management module is used for generating, managing network topology information, obtained result quilt
It is transferred to described network status data library module.
Described Link State discovery module is for obtaining the Link State of datum plane, and obtained result is transmitted
To described network status data library module.
Described network status data library module is for preserving from described Topology Management module and described Link State
The network topology information of discovery module acquisition and link-state information.
Described application message extraction module extracts packet information, and described packet information is sent to described
QoS routing calculation module.Wherein, described packet information include packet source IP address, purpose IP address and
Application characteristic information.Described application characteristic information refers to the field letter of reflection application packet required service grade
Breath, the type of service field of such as IPv4 agreement, or the Business Stream classification field of IPv6 agreement, or other are pre-
Definition agreement reflection application type field etc., above as application characteristic information can reflect data streaming service
The field of QoS information needs to carry out before data stream sends in process, or entrance SDN controller management and control territory
Effective information solicitation.
Described QoS routing calculation module is according to the network state letter extracted from described network status data library module
Breath and the packet information of described application message extraction module input, calculate data flow transmission route, obtained
Result be transferred to described stream table and automatically issue module.Specifically, described QoS routing calculation module will
According to the application characteristic information extracted from described application message extraction module, inquiry application characteristic information and QoS grade
Mapping table, if the QoS grade point of coupling can be obtained, then using this value as the QoS grade applied；Without
The QoS grade point that coupling is corresponding, then using acquiescence qos value as the QoS grade of application.Described QoS route
Computing module is always according to the QoS grade of application, in conjunction with the network extracted from described network status data library module
Status information, by affined SPF (CSPF) algorithm, calculates data flow transmission route, gained
To result be transferred to described stream table and automatically issue module.In the present embodiment, QoS routing calculation module is adopted
Path is calculated, in other embodiments, it is possible to use it with affined SPF (CSPF) algorithm
His algorithm, such as heuritic approach, calculates path.
Described stream table issues the data flow path information that module foundation is obtained by described QoS routing calculation module automatically,
Calculate and generate correspondence stream table, call the controller stream table that SDN controller carries and issue API, by described controller stream
Table issues API and completes stream table and issue.
It is above the description of the management system of the SDN controller QoS to the present invention, ties on the basis of this system below
Close Fig. 2 corresponding QoS path system of selection is illustrated.
Step 1), after SDN datum plane switch receives the application packet not mating stream table, by these data
Wrap and upload to control plane SDN controller by OpenFlow protocol channel；
Step 2), application message extraction module receive the above packet not mating stream table, resolve packet header,
Obtain the information such as packet source IP address, purpose IP address and application characteristic information, and information above is sent to
QoS routing calculation module.
Application characteristic information involved by this step refers to the field letter of reflection application packet required service grade
Breath, the type of service field of such as IPv4 agreement, or the Business Stream classification field of IPv6 agreement, or other are pre-
The field etc. of definition agreement reflection application type.
Step 3), QoS routing calculation module to network status data library module ask current network state information, bag
Include current network topology structure, link-state information；
Step 4), according to step 2) obtained by application characteristic information, search QoS routing calculation module safeguard
Application characteristic information and QoS grade mapping table, determine the QoS grade that this packet correspondence is applied；Wherein,
Described characteristic information, with QoS grade mapping table, have recorded default application characteristic information and QoS grade
Corresponding relation.Described QoS grade illustrates QoS and the physical network Actual path chain of application data stream demand
The satiable QoS in road, comprises: path delay, delay jitter, available bandwidth information, and above-mentioned one or
Multinomial combination.Such as, when network packet is IPv4 type and tos field value is 001 (Priority, preferential),
The QoS grade of its correspondence is 2 grades；And QoS grade is when being 2, corresponding network state situation is " overall time delay
Less than 40ms ".Above QoS grade arrange and with application characteristic information, the corresponding relation of network state situation
It is not limited to above description, is definable.
Step 5), according to step 3) obtained by network state information, and step 4) the QoS grade that determines
Requirement, calculates shortest path feasible between packet source IP address, purpose IP address.
Step 6) if according to step 5) shortest path that obtains has a plurality of, then select the path that jumping figure is minimum,
Path selection terminates；Otherwise, if link cannot generate between source data packet, purpose IP address after cutting out feasible
Path, then Path selection failure, packet will be dropped.
In technique scheme, described step 5) farther include:
Step 5-1), described QoS routing calculation module will to network status data library module ask network state information,
Including current network topology and link running status.
Step 5-2), described QoS routing calculation module based on above-mentioned network available topologies, according to application QoS
The network state that grade determines limits, and punctures all links not meeting qos requirement.Such as, application QoS etc.
Level require that path bandwidth is at least 5M, then in above topology all bandwidth do not meet this require link will be tailored
Fall, retrain with the QoS of satisfied application.
Described step 6) also include:
If being met the feasible path of QoS level requirements, then this routing information is issued to described stream table automatic
Issue module；Otherwise, terminating router-level topology process, packet will be dropped.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted.Although
With reference to embodiment, the present invention is described in detail, it will be understood by those within the art that, to the present invention
Technical scheme modify or equivalent, without departure from the spirit and scope of technical solution of the present invention, it is equal
Should contain in the middle of scope of the presently claimed invention.
Claims (6)
1. a SDN controller QoS manages system, it is characterised in that this system includes: network status data
Library module, application message extraction module, QoS routing calculation module, network topology management module, Link State are sent out
Existing module and stream table issue module automatically；Wherein,
Described network topology management module is used for generating, managing network topology information, obtained result quilt
It is transferred to described network status data library module；
Described Link State discovery module is for obtaining the Link State of datum plane, and obtained result is transmitted
To described network status data library module；
Described network status data library module is for preserving from described Topology Management module and described Link State
The network topology information of discovery module acquisition and link-state information；
Described application message extraction module extracts packet information, and described packet information is sent to described
QoS routing calculation module；Wherein, described packet information include packet source IP address, purpose IP address and
Application characteristic information；Described application characteristic information refers to the field letter of reflection application packet required service grade
Breath；
Described QoS routing calculation module is according to the network state letter extracted from described network status data library module
Breath and the packet information of described application message extraction module input, calculate data flow transmission route, obtained
Result be transferred to described stream table and automatically issue module；
Described stream table issues the data flow path information that module foundation is obtained by described QoS routing calculation module automatically,
Calculate and generate correspondence stream table, call the controller stream table that SDN controller carries and issue API, by described controller stream
Table issues API and completes stream table and issue.
SDN controller QoS the most according to claim 1 manages system, it is characterised in that described QoS
Routing calculation module farther includes following functions:
Current network state information is asked, including network topology structure and link to described network status data library module
Status information；
Receive described application message extraction module send packet information, including source IP address, purpose IP address with
And application characteristic information；
According to described application characteristic information, search predefined application characteristic information and QoS grade mapping table, really
The QoS grade of given data bag；
QoS grade and current network state information according to packet do path computing, obtain feasible path information；
Feasible path information is issued to described stream table and automatically issues module.
SDN controller QoS the most according to claim 2 manages system, it is characterised in that described QoS
Routing calculation module have employed affined shortest-path first algorithm when doing path computing.
4. the QoS management method that SDN controller QoS based on one of claim 1-3 management system is realized,
Including:
Step 1), after SDN datum plane switch receives the application packet not mating stream table, by these data
Wrap and upload to control plane SDN controller by OpenFlow protocol channel；
Step 2), application message extraction module receive the above packet not mating stream table, resolve packet header,
Obtain the information including packet source IP address, purpose IP address and application characteristic information, and will believe above
Breath is sent to QoS routing calculation module；
Step 3), QoS routing calculation module to network status data library module ask current network state information, bag
Include current network topology structure, link-state information；
Step 4), according to step 2) obtained by application characteristic information, search QoS routing calculation module safeguard
Application characteristic information and QoS grade mapping table, determine the QoS grade that this packet correspondence is applied；Wherein,
Described characteristic information, with QoS grade mapping table, have recorded default application characteristic information and QoS grade
Corresponding relation；Described QoS grade illustrates QoS and the physical network Actual path chain of application data stream demand
The QoS that road disclosure satisfy that, comprises: path delay, delay jitter, available bandwidth information, and above-mentioned one
Or multinomial combination；
Step 5), according to step 3) obtained by network state information, and step 4) the QoS grade that determines
Requirement, calculates shortest path feasible between packet source IP address, purpose IP address；
Step 6) if according to step 5) shortest path that obtains has a plurality of, then select the path that jumping figure is minimum,
Path selection terminates；Otherwise, if the feasible path that cannot generate between source data packet, purpose IP address, then road
Footpath selects unsuccessfully, and packet will be dropped.
QoS management method the most according to claim 4, it is characterised in that described step 5) further
Including:
Step 5-1), described QoS routing calculation module to network status data library module ask network state information,
Including current network topology and link running status；
Step 5-2), described QoS routing calculation module based on above-mentioned network available topologies, according to application QoS
The network state that grade determines limits, and punctures all links not meeting qos requirement.
QoS management method the most according to claim 4, it is characterised in that described step 6) also include:
If being met the feasible path of QoS level requirements, then this routing information is issued to described stream table automatic
Issue module；Otherwise, terminating router-level topology process, packet will be dropped.
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| CN107770065A (en) * | 2017-10-10 | 2018-03-06 | 山东大学 | A kind of streaming media path selecting system based on software defined network SDN |
| CN108989210A (en) * | 2017-06-02 | 2018-12-11 | 中兴通讯股份有限公司 | A kind of tunnel selecting method and software defined network controller based on strategy |
| CN109714275A (en) * | 2019-01-04 | 2019-05-03 | 电子科技大学 | A kind of SDN controller and its control method for access service transmission |
| CN109962804A (en) * | 2017-12-26 | 2019-07-02 | 中移（杭州）信息技术有限公司 | A kind of system and method distributing business service grade |
| CN109067758B (en) * | 2018-08-23 | 2020-07-10 | 江苏大学 | SDN network data transmission privacy protection system and method based on multiple paths |
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