CN106789677A - The QoS routing construction method and system of the support QoS based on SDN - Google Patents
The QoS routing construction method and system of the support QoS based on SDN Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/302—Route determination based on requested QoS
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Abstract
The invention provides the QoS routing construction method and system of a kind of support QoS based on SDN, it is applied in the network comprising Open vSwitch and OpenFlow controllers.The method includes：OpenFlow controllers are received, parsing IGMP messages, if the message is the message that request adds multicast group：OpenFlow controllers are that main frame creates the multicast path and Mulitcast Queue for meeting QoS guarantees；If the message is the message that multicast group is exited in request：OpenFlow controllers update flow table item, and whether have other multicast mems, and decide whether that this multicast group is safeguarded in continuation if inquiring about in multicast group where this main frame.The multicast that the inventive method builds can make network bandwidth occupancy reach load balancing, effectively reduce network delay and network packet loss rate, and requirement of the specific multicast group for time delay is met in the case where other application QoS is not influenceed.
Description
Technical field
The invention belongs to network technique field, the QoS routing construction method of specially a kind of support QoS based on SDN and
System.
Background technology
In recent years, internet there occurs huge change.Emerging multimedia application, such as audio/video conference, video point
Broadcast, ip phones generally it is bigger than the traditional network application demand such as Email and file transfer services.These network applications may
Including one group of user rather than a sender and a recipient.
Multicast refers to information from an address while passing to one group of destination address, in order to reduce Internet resources
Consumption, is widely used in internet, such as audio/video conference, video request program, ip phones, and is widely applied data
Center, such as distributed variable-frequencypump, distributed file system.In conventional multicast, multicast group covers all many by tree construction
Broadcast group membership.Router on tree must safeguard the forwarding state of each multicast group.With multicast application increase in a network,
The quantity of multicast group can be continuously increased, this considerably increases the size of routing table in router.The maintenance of super large routing table is not only
Need the big internal memory of capacity to support, and the lookup speed of routing address can be slowed down.Additionally, safeguard multicast tree need router it
Between exchange of control information, this will cause huge time and space expense with the increase of multicast group quantity.
In a network, many applications, for example：Video conference, multimedia broadcasting, multiplayer etc., require that network ensures
Service quality（QoS）.QoS refers to that a network can be using various basic technologies, for specified network service is provided preferably
Service ability, is a kind of security mechanism of network, is for solving network transmission bandwidth, transmission delay, network congestion and packet loss
A kind of technology of the problems such as rate.Various multicast applications propose a variety of requirements, matchmaker to the network bandwidth, time delay and shake
Body broadcast often requires that bandwidth higher, less shake；Distributed variable-frequencypump requirement high bandwidth and low time delay.How to perceive
Existing network situation, according to the state of current network, bandwidth usage, Delay etc., it is that multicast application selects optimal multicast
Path, ensures the service quality of application while Network Load Balance is ensured（QoS）Become a problem demanding prompt solution.
The proposition of software defined network (Software Defined Network, SDN) concept is deposited to solving legacy network
Problem provide new thinking.SDN is different from the distributed structure/architecture of traditional TCP/IP, and it is a kind of data control point
From the new network architectural framework of, software programmable.SDN employs the control plane and distributed Forwarding plane of centralization,
Two planes are disconnected from each other, and control plane carries out centralization using control-forwarding communication interface to the network equipment of Forwarding plane
Control, and flexible programmability is provided, it is finally reached the purpose for freely controlling flow to forward.
The content of the invention
In view of the shortcoming that existing multicasting technology is present in background technology, a kind of based on SDN's present invention aim at providing
Support the QoS routing construction method and system of QoS so that multicast can both reach network bandwidth load balancing, again can be according to industry
Business demand ensures service bandwidth and time delay.
To achieve the above object, the present invention provides a kind of QoS routing construction method of the support QoS based on SDN, application
In the communication network comprising OpenFlow controllers and Open vSwitch, wherein Open vSwitch are to support OpenFlow
The virtual switch of agreement, the QoS routing construction method of the support QoS based on SDN, comprises the following steps：
1. this method is comprised the following steps that based on IGMP v2 agreements：
(1) the IGMP messages that .Open vSwitch send subscriber's main station are transmitted to the OpenFlow controls for supporting IGMP agreements
Device, this OpenFlow controller parses the IGMP messages；
(2) if message described in (1) is the Membership Report messages that request adds multicast group：The OpenFlow controls
IGMP Receive message subscriber's main station address and Multicast group address of the device processed according to parsing, and be the master according to Multicast Routing Algorithm
Machine calculates the multicast path for meeting QoS guarantees；
(3) if message described in (1) is the Membership Report messages that request adds multicast group：According to step in (2)
After calculating multicast path, OpenFlow controllers measure the network bandwidth, the Open in multicast path is present in
In vSwitch create Mulitcast Queue and be Mulitcast Queue bandwidth resource；
(4) if message described in (1) is the Membership Report messages that request adds multicast group：OpenFlow controllers
Installed in Open vSwitch described in (3) or update flow table item, make the Open vSwitch can be with retransmitting multi-casting group message；
(5) if message described in (1) is the Leave Group messages that multicast group is left in request：The OpenFlow controllers root
IGMP Receive message subscriber's main station addresses and Multicast group address according to parsing, and inquire about in multicast group where this subscriber's main station whether
There are other multicast mems, if not having, the OpenFlow controllers stop safeguarding this multicast group, and discharge multicast resource to logical
Use queue；If with the presence of other members, the OpenFlow controllers continue to safeguard this multicast group, reinstall flow table item simultaneously
Reset QoS queue.
Multicast Routing Algorithm particular content is described in the step (2)：OpenFlow controllers are according to full mesh topology knot
Structure, using the Dynamic Multicast Routing Algorithm based on Prim algorithms for multicast group sets up QoS routing path.In order to adapt to network reality
Border situation, the Open vSwitch that will be joined directly together with multicast members' main frame calculate multicast path as multicast mem's node.
If SDN G=（V,E）, wherein G represents connected graph, and V represents the set of the Open vSwitch in SDN, and E represents network
The set reciprocal of the residual available bandwidth between node and node.Specifically include：
(2-1) adds multicast group
The node that acquiescence is added to multicast tree T by first is the sender of multicast group.If node v will be added to multicast tree
T, if v is being set on T, as long as carrying out flow table renewal and QoS queue setting to node v；Otherwise, just already present
Prim algorithms are continued through on the basis of tree T calculate to obtain minimum spanning tree；Then new counted minimum spanning tree is pruned,
It is not the node of multicast members and the node number of degrees less than 2 to remove；Eventually form new multicast tree T.Implement step as follows：
S1:It is input into the node treeNodes and side treeEdges of multicast tree, and the new multicast mem member for adding.
S2:Judge the node number of multicast tree, if 0, then the new multicast mem member for adding is added to multicast tree
Node treeNodes in, as the sender of multicast group, and terminate algorithm；Otherwise, step S3 is continued.
S3:Judge whether the new multicast mem for adding is contained in treeNodes, if so, then updating the stream of the multicast mem
Table, and terminate algorithm；Otherwise, step S4 is continued.
S4:On the basis of existing multicast tree, continue what is be joined directly together according to the searching of Prim algorithms and existing multicast tree,
And the minimum side of weights；Then this edge is added into treeEdges, the summit of this edge is added to treeEdges；Then
Repeat the above steps, until new multicast node is added into treeNodes.
S5:Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are less than
2, then delete；Repeat the above steps, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than being equal to
2。
S6:Update the flow table of multicast tree node treeNodes.
S7:Reset the QoS queue of multicast node treeNodes.
(2-2) exits multicast group
If node v will exit multicast tree T, if node v is the sender of multicast group, multicast tree T is deleted, update whole
The flow table and QoS queue of the node of multicast tree.Otherwise, if the number of degrees of v are more than or equal to 2, as long as carrying out flow table renewal to node v
Set with QoS queue；Otherwise, deletion of node v, and spanning tree T is pruned, it be not multicast members and node to remove
Node of the number of degrees less than 2, eventually forms new multicast tree T.Implement step as follows：
S1:It is input into the node treeNodes and side treeEdges of multicast tree, and the multicast mem member to be exited.
S2:Judge the number of the node treeNodes of multicast tree, if number is 1, delete the multicast tree, and terminate to calculate
Method；Otherwise continue executing with step S3.
S3:The number of degrees of multicast mem's member nodes that judgement is exited, if the node number of degrees are more than or equal to 2, update this many
The flow table of member is broadcast, QoS queue is changed, and terminate algorithm；Otherwise perform step 4.
S4:Multicast mem member and many with what member was joined directly together is deleted from multicast tree node treeNodes
Broadcast the side of tree.
S5:Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are less than
2, then delete, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than being equal to 2.
S6:Update the flow table of multicast tree node treeNodes.
S7:Reset the QoS queue of multicast node treeNodes.
QoS described in the step (2) is ensured and set especially by following steps：User is controlled by the OpenFlow
Device processed sets the qos requirement to specific multicast group；
The measuring method of the network bandwidth, concretely comprises the following steps described in the step (3)：By sFlow, this Network Monitoring Technology is made
It is the One function module in the OpenFlow controllers, for collecting sFlow messages and measuring the band of SDN link
Width, for QoS routing provides real-time network bandwidth information.In order to solve sFlow agreements with OpenFlow controllers to each
The naming conflict of each port of Open vSwitch, OpenFlow controllers inquire about Open vSwitch users at regular intervals
Database information under space module, it is then that the name port numbers of sFlow are corresponding with the port numbers that Open vSwitch are named
Afterwards, in a table, inquiry is used after being provided with for storage；In order to obtain the bandwidth of network link, will be by an Open
The size superposition of all data flows of vSwitch outlets, obtains the summation by all data flows of the outlet, as this
The upstream bandwidth of individual Open vSwitch ports.
Described in the step (3) in Open vSwitch for Mulitcast Queue bandwidth resource especially by QoS
Queue is configured, and specific steps include：The entrance and exit in Open vSwitch is respectively provided with QoS and carrys out control data respectively
The arrival rate and service speed of stream.QoS queue using layering token bucket algorithm realize, can newly-built queue, configuration queue and
Delete queue.For entrance, Traffic Control are used（Built-in one of Linux kernels can realize Limit Rate, flow
Amount shaping, tactful application framework）Realize that the QoS of Open vSwitch Way ins is set.The number of entrance is redirected using TC
According to stream, the packet of input direction is redirected by Ingress qdisc by importing virtual unit IFB, then again to IFB's
Outlet configuration QoS queue, this QoS for allowing for Open vSwitch input directions can also use layering token bucket algorithm to realize,
So as to set multiple queue disciplines.Wherein, QoS queue is the queue that resource reservation is provided for specific multicast group, in multicast process
In, it is preferential that there are stable bandwidth resources.
Flow table item specific steps are installed described in the step (4) to be included：The OpenFlow controllers are by after calculating
Multicast path issues flow table by Packet-Out message to all Open vSwitch on multicast path, makes the number in network
Forwarded according to the path being calculated according to stream.
Whether there is other member's specific steps bags in the inquiry multicast group of OpenFlow controllers described in the step (5)
Include：OpenFlow controllers notify that requestor sends the Group-Specific Query messages for multicast group, if network
In also in the presence of other members of this multicast group, then the member of this multicast group, can at this after specific multicast group query message is received
Membership report's message is sent in the maximum response time set in message, if not receiving this in maximum response time
Membership Report's message that the multicast mem of multicast group sends, OpenFlow controllers are then thought in the network without this multicast group
Member.
With the presence or absence of in other member's specific steps in the inquiry multicast group of OpenFlow controllers described in the step (5)
The requestor is built using following steps：Two are carried out to the IGMP function management modules in the OpenFlow controllers Ryu that increases income
Secondary exploitation, makes one and only one Open vSwitch in network serve as the role of requestor, and other Open vSwitch are carried on a shoulder pole
Appoint the role of non-querier.In QoS routing, the requestor can periodically send Time-General-Query messages, many
The group membership for broadcasting group can respond the message, rather than multicast members will not then respond the message.
A kind of QoS routing constructing system of the support QoS based on SDN, is applied to comprising OpenFlow controllers and Open
In the communication network of vSwitch, the above method is applied to, wherein Open vSwitch are the virtual friendships for supporting OpenFlow agreements
Change planes, the QoS routing constructing system of the support QoS based on SDN includes：
One Topology Management module：Use Link Layer Discovery Protocol（Link Layer Discovery Protocol, LLDP）Hair
Equipment in existing network network, including the link condition of interchanger, main frame and each port etc..Finding the topological structure of whole network
Afterwards, Topology Management module provides the API that can be directly invoked for other functions module；
One sFlow collector：For collecting the sFlow messages that the sFlow Agent being embedded in Open vSwitch send.
By parsing sFlow messages, sFlow collectors can just calculate the bandwidth of network link, and for other functions module is provided
The API that can be directly invoked；
One IGMP management module：The course of work for realizing IGMP v2 under SDN framework, multicast in management network
Group membership's relation；
One QoS sets functional module：The functional module is set to specific multicast group by northbound interface to SDN control planes
Qos requirement；
One Multicast Routing Algorithm module：There is provided according to the network topology and sFlow collectors provided by Topology Management module
The network bandwidth, is that multicast group calculates network traffic load multicast path in a balanced way, and for multicast mem sets up and safeguards many
Broadcast path；
One queue management module：The QoS queue of the entrance and exit of all Open vSwitch is managed, system is mainly by being somebody's turn to do
Managing functional module queue and for multicast group bandwidth resource so as to realize bandwidth QoS guarantee；
One route installs module：The module is by the multicast path after calculating by Packet-Out message on multicast path
All Open vSwitch issue flow table, the data flow in network is forwarded according to the path being calculated.
The present invention compared with prior art, enters with following obvious prominent substantive distinguishing features and notable technology
Step：
High bandwidth can be provided for multicast application by the QoS routing constructed by the inventive method, low packet loss ratio, low jitter is protected
The QoS for demonstrate,proving time delay is ensured, with preferable practicality and versatility.
Brief description of the drawings
Fig. 1 is the flow chart of the QoS routing construction method of the support QoS based on SDN；
Fig. 2 is the structured flowchart of the QoS routing constructing system of the support QoS based on SDN；
Fig. 3 is the timing diagram that multicast mem adds multicast group；
Fig. 4 leaves the timing diagram of multicast group for multicast mem；
Fig. 5 is the flow graph of packet in Open vSwitch.
Specific embodiment
The present invention is described with reference to the drawings below by way of preferred embodiment.
Embodiment one：
Referring to Fig. 1, the QoS routing construction method of this support QoS based on SDN, be applied to comprising OpenFlow controllers and
In the communication network of Open vSwitch, based on IGMP v2 agreements, including following operating procedure：
(1) the IGMP messages that .Open vSwitch send subscriber's main station are transmitted to the OpenFlow controls for supporting IGMP agreements
Device, this OpenFlow controller parses the IGMP messages；
(2) if message described in steps (1) is the Membership Report messages that request adds multicast group：It is described
IGMP Receive message subscriber's main station address and Multicast group address of the OpenFlow controllers according to parsing, and calculated according to QoS routing
Method is the multicast path that the Framework computing meets QoS guarantees；
(3) if message described in steps (1) is the Membership Report messages that request adds multicast group：According to step
(2) after calculating multicast path, OpenFlow controllers measure the network bandwidth, the Open in multicast path is present in
In vSwitch create Mulitcast Queue and be Mulitcast Queue bandwidth resource；
(4) if message described in steps (1) is the Membership Report messages that request adds multicast group：OpenFlow is controlled
Device processed is installed in Open vSwitch described in step (3) or updates flow table item, makes the Open vSwitch can be with retransmitting multi-casting
Group message；
(5) if message described in steps (1) is the Leave Group messages that multicast group is left in request：The OpenFlow controls
IGMP Receive message subscriber's main station address and Multicast group address of the device according to parsing, and inquire about in multicast group where this subscriber's main station
Whether other multicast mems are had, if not having, the OpenFlow controllers stop safeguarding this multicast group, and discharge multicast resource
To generic queue；If with the presence of other members, the OpenFlow controllers continue to safeguard this multicast group, reinstall flow table
Item simultaneously resets QoS queue.
Embodiment two：
The present embodiment provides a kind of QoS routing construction method of the support QoS based on SDN, the multicast road built by the method
By network traffic load can be made balanced, reduce network packet loss rate, reduce network delay, and can be provided according to business demand
Bandwidth and the QoS for postponing are ensured.
Wherein, SDN（Software Define Network）Refer to software defined network, be a kind of new network innovation
Framework, is a kind of implementation of network virtualization, and its core technology OpenFlow is by by network device control plane and number
Come according to planar separation, it is achieved thereby that the flexible control of network traffics, makes network become more intelligent.
QoS（Quality of Service）It is service quality, refers to that a network can be using various basic technologies, to refer to
Fixed network service provides more preferable service ability, is a kind of security mechanism of network, is for solving network delay and obstruction
A kind of technology.Under normal circumstances, if network is served only for specific timeless application system, and QoS is not needed,
Such as Web is applied, or E-mail settings etc..But it is just very necessary to key application and multimedia application.When network over loading or
During congestion, QoS can ensure that important service amount is not postponed or abandoned, while ensureing the Effec-tive Function of network.
This method is based on IGMP v2 agreements, IGMP (Internet Group Management Protocol) associations
View is an agreement operated between main frame and multicast router, for carrying out the interaction of multicast mem's information.Wherein, IGMP
V2 defines the election mechanism of primitive rule, group membership's inquiry mechanism, report mechanism and router.In IGMP v2, route
Device is divided into two major classes, and a class is querying router, and another kind of is non-querying router.One network one and only one route
Device is querying router, and other routers are non-querying router.
When certain main frame wishes to be added to certain specific multicast group, the main frame can be to the router being joined directly together therewith
Send and add multicast group message, inform that the router main frame wishes to send or receive the data of certain multicast group；Querying router
After receiving message, the message is added to the status list that querying router is safeguarded, while multicast distribution tree is set up in initiation
Request.When certain main frame wishes to exit certain specific multicast group, membership report's message directly is sent to router, just
Multicast group can be exited.
Specifically, the present embodiment provides a kind of QoS routing construction method of the support QoS based on SDN, including following step
Suddenly：
(1) the IGMP messages that Open vSwitch send subscriber's main station are transmitted to the SDN controllers for supporting IGMP agreements, this
OpenFlow controllers parse the IGMP messages.Specific steps include：
(1a) host A sends the IGMP messages for multicast group to the Open vSwitch being attached thereto；
(1b), due to the flow table item for not having to match IGMP messages in Open vSwitch, Open vSwitch can be to OpenFlow
Controller sends the Packet-In message comprising IGMP messages.
(1c) OpenFlow controllers parse Packet-In message；
(2) if the IGMP messages that Packet-In message packages contain described in (1) are the Membership that request adds multicast group
Report messages, indicate that main frame will add multicast group, and OpenFlow controllers are according to Multicast Routing Algorithm described in (1b)
The Framework computing meets the multicast path of QoS guarantees, and specific steps include：OpenFlow controllers parsing Packet-In disappears
Breath, after the host A and Multicast group address for knowing to add multicast group, OpenFlow controllers are using Multicast Routing Algorithm should
The new multicast mem A for adding calculates a multicast path and judges whether the Multicast group address is provided with QoS guarantees,
If 2a) being not provided with QoS guarantees, terminate operation；
If 2b) judging whether the multicast path of the calculating ensure that band is wider than W there is provided bandwidth QoS is ensured, if full
Foot requires then to perform the（3）Step, terminates operation if being unsatisfactory for；
If 2c) there is provided time delay QoS ensure, judge the calculating multicast path whether can time delay prolong less than T1, if meet
It is required that then performing（3）Step, terminates if being unsatisfactory for；
Specifically, Multicast Routing Algorithm described in step (2) includes herein below：OpenFlow controllers are according to full mesh topology knot
Structure, using the Dynamic Multicast Routing Algorithm based on Prim algorithms for multicast group sets up QoS routing path.In order to adapt to network reality
Border situation, the Open vSwtich that will be joined directly together with multicast members' main frame calculate multicast path as multicast mem's node.
If SDN G=（V,E）, wherein G represents connected graph, and V represents the set of the Open vSwitch in SDN, and E represents network
The set reciprocal of the residual available bandwidth between node and node.Specifically include：
Add multicast group
The node that acquiescence is added to multicast tree T by first is the sender of multicast group.If node v will be added to multicast tree
T, if v is being set on T, as long as carrying out flow table renewal and QoS queue setting to node v；Otherwise, just already present
Prim algorithms are continued through on the basis of tree T calculate to obtain minimum spanning tree；Then new counted minimum spanning tree is pruned,
It is not the node of multicast members and the node number of degrees less than 2 to remove；Eventually form new multicast tree T.Implement step as follows：
S1:It is input into the node treeNodes and side treeEdges of multicast tree, and the new multicast mem member for adding.
S2:Judge the node number of multicast tree, if 0, then the new multicast mem member for adding is added to multicast tree
Node treeNodes in, as the sender of multicast group, and terminate algorithm；Otherwise, step S3 is continued.
S3:Judge whether the new multicast mem for adding is contained in treeNodes, if so, then updating the stream of the multicast mem
Table, and terminate algorithm；Otherwise, step S4 is continued.
S4:On the basis of existing multicast tree, continue what is be joined directly together according to the searching of Prim algorithms and existing multicast tree,
And the minimum side of weights；Then this edge is added into treeEdges, the summit of this edge is added to treeEdges；Then
Repeat the above steps, until new multicast node is added into treeNodes.
S5:Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are less than
2, then delete；Repeat the above steps, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than being equal to
2。
S6:Update the flow table of multicast tree node treeNodes.
S7:Reset the QoS queue of multicast node treeNodes.
Exit multicast group
If node v will exit multicast tree T, if node v is the sender of multicast group, multicast tree T is deleted, update whole
The flow table and QoS queue of the node of multicast tree.Otherwise, if the number of degrees of v are more than or equal to 2, as long as carrying out flow table renewal to node v
Set with QoS queue；Otherwise, deletion of node v, and spanning tree T is pruned, it be not multicast members and node to remove
Node of the number of degrees less than 2, eventually forms new multicast tree T.Implement step as follows：
S1:It is input into the node treeNodes and side treeEdges of multicast tree, and the multicast mem member to be exited.
S2:Judge the number of the node treeNodes of multicast tree, if number is 1, delete the multicast tree, and terminate to calculate
Method；Otherwise continue executing with step S3.
S3:The number of degrees of multicast mem's member nodes that judgement is exited, if the node number of degrees are more than or equal to 2, update this many
The flow table of member is broadcast, QoS queue is changed, and terminate algorithm；Otherwise perform step 4.
S4:Multicast mem member and many with what member was joined directly together is deleted from multicast tree node treeNodes
Broadcast the side of tree.
S5:Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are less than
2, then delete, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than being equal to 2.
S6:Update the flow table of multicast tree node treeNodes.
S7:Reset the QoS queue of multicast node treeNodes.
(3) if the IGMP messages that Packet-In message packages contain described in (1) are the Membership that request adds multicast group
Report messages, after OpenFlow controllers are according to step calculates multicast path in (2), OpenFlow controllers measure net
Network bandwidth, creates Mulitcast Queue and for the reserved bandwidth of Mulitcast Queue is provided in the Open vSwitch being present in multicast path
Source, specific steps include：SDN controllers are following behaviour to the entrance and exit of the SDN switch on the multicast path that calculates
Make：
The bandwidth of generic queue 3a) is reduced into W；
3b) newly-built queue Q, and for the reserved bandwidth capacity size of the queue is the bandwidth resources of W.
Specifically, the Measurement bandwidth in step (3) uses following steps：Using this Network Monitoring Technology of sFlow as institute
The One function module in OpenFlow controllers is stated, for collecting sFlow messages and measuring the bandwidth of SDN link,
For QoS routing provides real-time network bandwidth information.In order to solve sFlow agreements with OpenFlow controllers to each Open
The naming conflict of each port of vSwitch, OpenFlow controllers inquire about Open vSwitch user's spaces at regular intervals
Database information under module, then by the name port numbers of sFlow it is corresponding with the port numbers that Open vSwitch are named after, deposit
In a table, inquiry is used after being provided with for storage；In order to obtain the bandwidth of network link, will be exported by an Open vSwitch
All data flows size superposition, the summation by all data flows of the outlet is obtained, as this Open
The upstream bandwidth of vSwitch ports.
Specifically, being Mulitcast Queue bandwidth resource described in step (3), specific steps include：Respectively in Open
The entrance and exit of vSwitch is respectively provided with the arrival rate and service speed that QoS carrys out control data stream.QoS queue is used and divided
Layer token bucket algorithm realization, being capable of newly-built queue, configuration queue and deletion queue.As shown in figure 5, for entrance, using
Traffic Control（Built-in one of Linux kernels can realize Limit Rate, traffic shaping, tactful application framework）It is real
The QoS of existing Open vSwitch Way ins is set.The data flow of entrance is redirected using TC, by Ingress qdisc
The packet of input direction is redirected importing virtual unit IFB, the then outlet again to IFB configures QoS queue, and this just makes
The QoS for obtaining Open vSwitch input directions can also be realized using HTB, so as to set multiple queue disciplines.Wherein, QoS queue
It is the queue that resource reservation is provided for specific multicast group, it is preferential that there are stable bandwidth resources in multicast process.
(4) if the IGMP messages that Packet-In message packages contain described in (1) are the Membership that request adds multicast group
Report messages, after OpenFlow controllers reserve resource according to step (3) for Mulitcast Queue, install in Open vSwitch
Flow table item, allows Open vSwitch to main frame retransmitting multi-casting group message described in (1), and specific steps include：OpenFlow
Controller sends Packet-Out message to Open vSwitch, and the message installs flow table in the flow table of Open vSwitch
, when Open vSwitch receive the message from multicast group, can be by message feeding queue Q.
(5) if the IGMP message requests that Packet-In message packages contain described in (1) leave the Leave Group of multicast group
Message：Whether the OpenFlow controllers inquire about in multicast group where this main frame have other multicast mems, described if not having
OpenFlow controllers stop safeguarding this multicast group, and discharge multicast resource to generic queue；If with the presence of other members, institute
State OpenFlow controllers to continue to safeguard this multicast group, and reset QoS queue, specific steps include：
(5a) OpenFlow controllers parse Packet-In message, know to the host B of multicast group G2 and multicast group ground for leaving
Behind location, OpenFlow controllers notify that requestor sends the Group-Specific Query messages for this multicast group；
(5b) is if also in the presence of other members of this multicast group in network, the member of multicast group is receiving group-specific query message
Afterwards, membership report's message is sent in the maximum response time that can be set in the message；
(5c) if do not received in maximum response time this multicast group multicast mem send Membership Report's message,
OpenFlow controllers then think the interior member without this multicast group of the network, then no longer safeguard this multicast members's
Relation, performs (5d) step, and otherwise OpenFlow controllers may proceed to safeguard the member relation of multicast group, and perform (5f) step;
(5d) SDN controllers send Packet-Out message to the SDN switch on Multicast Group Multicast path, in deleting its flow table
Forwarding strategy on this multicast group；
(5e) OpenFlow controllers are done as follows to SDN switch：Bandwidth resources shared by release multicast group G2；To release
The resource allocation put terminates operation to generic queue；
(5f) OpenFlow controllers install flow table item in recalculating multicast tree and the flow table in SDN switch, set again
Put QoS queue.
Specifically, requestor described in (5a) is built by following steps：To in the OpenFlow controllers Ryu that increases income
IGMP function management modules carry out secondary development, one and only one SDN switch in network is served as the role of requestor, its
Its SDN switch serves as the role of non-querier.In QoS routing, the requestor can periodically send Time-
General-Query messages, the group membership of multicast group can respond the message, rather than multicast members will not then respond the message.
Embodiment three：The present embodiment provides a kind of QoS routing constructing system of the support QoS based on SDN, is applied to bag
In the communication network of controller containing OpenFlow and Open vSwitch, the above method, the support based on SDN are applied to
The QoS routing constructing system of QoS includes：One Topology Management module, a sFlow collector, an IGMP management module,
One QoS sets functional module, and a Multicast Routing Algorithm module, a queue management module and a route install module.
Wherein, Topology Management module：Use Link Layer Discovery Protocol（Link Layer Discovery Protocol,
LLDP）It was found that the equipment in network, including the link condition of interchanger, main frame and each port etc., is finding whole network
After topological structure, Topology Management module provides the API that can be directly invoked for other functions module；
SFlow collectors：For collecting the sFlow messages that the sFlow Agent being embedded in OpenFlow interchangers send.It is logical
Cross parsing sFlow messages, sFlow collectors can just calculate the bandwidth of network link, and for other functions module is provided can
With the API for directly invoking；
IGMP management modules：The course of work for realizing IGMP v2 under SDN framework, multicast composition in management network
Member's relation；
QoS sets functional module：The functional module sets the QoS to specific multicast group by northbound interface to SDN control planes
It is required that；
Multicast Routing Algorithm module：According to the network that the network topology and sFlow collectors provided by Topology Management module are provided
Bandwidth, is that multicast group calculates network traffic load multicast path in a balanced way, and for multicast mem sets up and safeguard multicast road
Footpath；
Queue management module：The QoS queue of the entrance and exit of all Open vSwitch is managed, system mainly passes through the function
Module management queue is multicast group bandwidth resource so as to realize bandwidth QoS guarantee；
Route installs module：The module is by the multicast path after calculating by Packet-Out message to all on multicast path
Open vSwitch issue flow table, the data flow in network is forwarded according to the path being calculated.
Claims (9)
1. a kind of QoS routing construction method of the support QoS based on SDN, is applied to comprising OpenFlow controllers and Open
In the communication network of vSwitch, it is characterised in that：Based on IGMP v2 agreements, including following operating procedure：
(1) the IGMP messages that .Open vSwitch send subscriber's main station are transmitted to the OpenFlow controls for supporting IGMP agreements
Device, this OpenFlow controller parses the IGMP messages；
(2) if message described in steps (1) is the Membership Report messages that request adds multicast group：It is described
IGMP Receive message subscriber's main station address and Multicast group address of the OpenFlow controllers according to parsing, and calculated according to QoS routing
Method is the multicast path that the Framework computing meets QoS guarantees；
(3) if message described in steps (1) is the Membership Report messages that request adds multicast group：According to step
(2) after calculating multicast path, OpenFlow controllers measure the network bandwidth, the Open in multicast path is present in
In vSwitch create Mulitcast Queue and be Mulitcast Queue bandwidth resource；
(4) if message described in steps (1) is the Membership Report messages that request adds multicast group：OpenFlow is controlled
Device processed is installed in Open vSwitch described in step (3) or updates flow table item, makes the Open vSwitch can be with retransmitting multi-casting
Group message；
(5) if message described in steps (1) is the Leave Group messages that multicast group is left in request：The OpenFlow controls
IGMP Receive message subscriber's main station address and Multicast group address of the device according to parsing, and inquire about in multicast group where this subscriber's main station
Whether other multicast mems are had, if not having, the OpenFlow controllers stop safeguarding this multicast group, and discharge multicast resource
To generic queue；If with the presence of other members, the OpenFlow controllers continue to safeguard this multicast group, reinstall flow table
Item simultaneously resets QoS queue.
2. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
(2) Multicast Routing Algorithm particular content described in is：OpenFlow controllers are calculated according to full mesh topology structure using based on Prim
The Dynamic Multicast Routing Algorithm of method sets up QoS routing path for multicast group；In order to adapt to network actual state, will be with multicast group
The Open vSwtich that member host is joined directly together calculate multicast path as multicast mem's node；If SDN G=（V,E）,
Wherein G represents connected graph, and V represents the set of the Open vSwitch in SDN, and E is represented between network node and node
The set reciprocal of residual available bandwidth；Specifically include：
(2-1) adds multicast group
The node that acquiescence is added to multicast tree T by first is the sender of multicast group, if node v will be added to multicast tree
T, if v is being set on T, as long as carrying out flow table renewal and QoS queue setting to node v；Otherwise, just already present
Prim algorithms are continued through on the basis of tree T calculate to obtain minimum spanning tree；Then new counted minimum spanning tree is pruned,
It is not the node of multicast members and the node number of degrees less than 2 to remove；Eventually form new multicast tree T；Implement step as follows：
(2-1-1):It is input into the node treeNodes and side treeEdges of multicast tree, and the new multicast mem for adding
member；
(2-1-2):Judge the node number of multicast tree, if 0, then the new multicast mem member for adding is added to multicast tree
Node treeNodes in, as the sender of multicast group, and terminate algorithm；Otherwise, step (2-1-3) is continued；
(2-1-3):Judge whether the new multicast mem for adding is contained in treeNodes, if so, then updating the stream of the multicast mem
Table, and terminate algorithm；Otherwise, step (2-1-4) is continued；
(2-1-4):On the basis of existing multicast tree, continue to be joined directly together with existing multicast tree according to the searching of Prim algorithms
, and the minimum side of weights；Then this edge is added into treeEdges, the summit of this edge is added to treeEdges；
Then repeat the above steps, until new multicast node is added into treeNodes；
(2-1-5):Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are small
In 2, then delete；Repeat the above steps, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than
In 2；
(2-1-6):Update the flow table of multicast tree node treeNodes；
(2-1-7):Reset the QoS queue of multicast node treeNodes；
(2-2) exits multicast group
If node v will exit multicast tree T, if node v is the sender of multicast group, multicast tree T is deleted, update whole
The flow table and QoS queue of the node of multicast tree；Otherwise, if the number of degrees of v are more than or equal to 2, as long as carrying out flow table renewal to node v
Set with QoS queue；Otherwise, deletion of node v, and spanning tree T is pruned, it be not multicast members and node to remove
Node of the number of degrees less than 2, eventually forms new multicast tree T；Implement step as follows：
(2-2-1):It is input into the node treeNodes and side treeEdges of multicast tree, and the multicast mem to be exited
member；
(2-2-2):Judge the number of the node treeNodes of multicast tree, if number is 1, delete the multicast tree, and terminate to calculate
Method；Otherwise continue executing with step (2-2-3)；
(2-2-3):The number of degrees of multicast mem's member nodes that judgement is exited, if the node number of degrees are more than or equal to 2, update this many
The flow table of member is broadcast, QoS queue is changed, and terminate algorithm；Otherwise perform step (2-2-4)；
(2-2-4):Multicast mem member and many with what member was joined directly together is deleted from multicast tree node treeNodes
Broadcast the side of tree；
(2-2-5):Beta pruning：Traversal multicast tree node treeNodes, if node is non-multicast member's node, and the node number of degrees are small
In 2, then delete, until the number of degrees of non-multicast member's node of multicast tree node treeNodes are all higher than being equal to 2；
(2-2-6):Update the flow table of multicast tree node treeNodes；
(2-2-7):Reset the QoS queue of multicast node treeNodes.
3. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
Suddenly the QoS described in (2) is ensured and set especially by following steps：User is set to specific by the OpenFlow controllers
The qos requirement of multicast group.
4. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
Suddenly the measuring method of the network bandwidth described in (3), concretely comprises the following steps：Using this Network Monitoring Technology of sFlow as described
One function module in OpenFlow controllers, for collecting sFlow messages and measuring the bandwidth of SDN link, be
QoS routing provides real-time network bandwidth information；In order to solve sFlow agreements with OpenFlow controllers to each Open
The naming conflict of each port of vSwitch, OpenFlow controllers inquire about Open vSwitch user's spaces at regular intervals
Database information under module, then by the name port numbers of sFlow it is corresponding with the port numbers that Open vSwitch are named after, deposit
In a table, inquiry is used after being provided with for storage；In order to obtain the bandwidth of network link, will be exported by an Open vSwitch
All data flows size superposition, the summation by all data flows of the outlet is obtained, as this Open
The upstream bandwidth of vSwitch ports.
5. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
Suddenly described in (3) in Open vSwitch for Mulitcast Queue bandwidth resource is configured especially by QoS queue, tool
Body step includes：Respectively the entrance and exit in Open vSwitch be respectively provided with QoS come control data stream arrival rate and
Service speed；QoS queue uses layering token bucket algorithm to realize, being capable of newly-built queue, configuration queue and deletion queue；For entering
Mouthful, using Traffic Control, built-in one of Linux kernels can realize Limit Rate, traffic shaping, strategy application
Framework, realizes that the QoS of Open vSwitch Way ins is set；The data flow of entrance is redirected using TC, by Ingress
The packet of input direction is redirected importing virtual unit IFB by qdisc, and the then outlet again to IFB configures QoS queue,
This QoS for allowing for Open vSwitch input directions can also be realized using layering token bucket algorithm, so as to set multiple queues
Regulation；Wherein, QoS queue is the queue that resource reservation is provided for specific multicast group, in multicast process, preferentially has stabilization
Bandwidth resources.
6. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
Suddenly flow table item specific steps are installed described in (4) includes：The OpenFlow controllers pass through the multicast path after calculating
Packet-Out message issues flow table to all Open vSwitch on multicast path, makes the data flow in network according to calculating
The path forwarding for obtaining.
7. the QoS routing construction method of the support QoS of SDN is based on according to claim 1, it is characterised in that：The step
Suddenly include with the presence or absence of other member's specific steps in the inquiry of OpenFlow controllers described in (5) multicast group：OpenFlow is controlled
Device processed notifies that requestor sends the Group-Specific Query messages for multicast group, if also there is this multicast in network
Group other members, then the member of this multicast group after specific multicast group query message is received, can in the message setting most
Membership report's message is sent in the big response time, if do not received in maximum response time the multicast of this multicast group into
Membership Report's message that member sends, OpenFlow controllers then think the interior member without this multicast group of the network.
8. the QoS routing construction method of the support QoS of SDN is based on according to claim 1 or 7, it is characterised in that：Institute
Requestor is stated to be built using following steps：IGMP function management modules in the OpenFlow controllers Ryu that increases income are carried out secondary
Exploitation, makes one and only one Open vSwitch in network serve as the role of requestor, and other Open vSwitch are served as
The role of non-querier；In QoS routing, the requestor can periodically send Time-General-Query messages, multicast
The group membership of group can respond the message, rather than multicast members will not then respond the message.
9. a kind of QoS routing constructing system of the support QoS based on SDN, is applied to comprising OpenFlow controllers and Open
In the communication network of vSwitch, the QoS routing structure side of the support QoS based on SDN according to claim 1 is applied to
Method, it is characterised in that：The QoS routing constructing system of the support QoS based on SDN includes：
One Topology Management module：Using Link Layer Discovery Protocol LLDP find network in equipment, including interchanger, main frame with
And the link condition of each port etc.；After the topological structure for finding whole network, Topology Management module is carried for other functions module
For the API that can be directly invoked；
One sFlow collector：For collecting the sFlow messages that the sFlow Agent being embedded in Open vSwitch send；
By parsing sFlow messages, sFlow collectors can just calculate the bandwidth of network link, and for other functions module is provided
The API that can be directly invoked；
One IGMP management module：The course of work for realizing IGMP v2 under SDN framework, multicast in management network
Group membership's relation；
One QoS sets functional module：The functional module is set to specific multicast group by northbound interface to SDN control planes
Qos requirement；
One Multicast Routing Algorithm module：There is provided according to the network topology and sFlow collectors provided by Topology Management module
The network bandwidth, is that multicast group calculates network traffic load multicast path in a balanced way, and for multicast mem sets up and safeguards many
Broadcast path；
One queue management module：The QoS queue of the entrance and exit of all Open vSwitch is managed, system is mainly by being somebody's turn to do
Managing functional module queue and for multicast group bandwidth resource so as to realize bandwidth QoS guarantee；
One route installs module：The module is by the multicast path after calculating by Packet-Out message on multicast path
All Open vSwitch issue flow table, the data flow in network is forwarded according to the path being calculated.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199956A (en) * | 2017-12-05 | 2018-06-22 | 上海大学 | The distributed shared memory construction method of state aware based on SDN |
| CN108762953A (en) * | 2018-05-25 | 2018-11-06 | 连云港杰瑞电子有限公司 | A kind of message queue implementation method |
| CN108881069A (en) * | 2018-06-26 | 2018-11-23 | 新华三云计算技术有限公司 | Retransmission method, device and the server of multicast traffic |
| CN110290069A (en) * | 2019-06-18 | 2019-09-27 | 西安交通大学 | A kind of reliable multicast method for routing under SDN scene |
| CN111918340A (en) * | 2020-07-08 | 2020-11-10 | 河北百亚信息科技有限公司 | WiFi wireless network bandwidth allocation method |
| CN113067727A (en) * | 2021-03-16 | 2021-07-02 | 牛智军 | Cross-regional full-compatibility device based on domestic system and network topology acquisition method thereof |
| CN114157597A (en) * | 2020-08-18 | 2022-03-08 | 瞻博网络公司 | Weighted multicast join load balancing |
| CN116233871A (en) * | 2023-01-17 | 2023-06-06 | 广州爱浦路网络技术有限公司 | XR service enhancement method, computer device and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167311A (en) * | 2005-04-25 | 2008-04-23 | 汤姆森特许公司 | Multicast route protocol in gridding network |
| CN101447936A (en) * | 2008-12-31 | 2009-06-03 | 中山大学 | Multicast routing method based on particle swarm algorithm |
| CN104486094A (en) * | 2014-12-15 | 2015-04-01 | 西安电子科技大学 | Multicast traffic grooming method based on physical topology light-tree correction |
| CN104837172A (en) * | 2015-05-06 | 2015-08-12 | 天津理工大学 | DT-MAODV multicast routing method |
-
2017
- 2017-02-20 CN CN201710089542.4A patent/CN106789677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167311A (en) * | 2005-04-25 | 2008-04-23 | 汤姆森特许公司 | Multicast route protocol in gridding network |
| CN101447936A (en) * | 2008-12-31 | 2009-06-03 | 中山大学 | Multicast routing method based on particle swarm algorithm |
| CN104486094A (en) * | 2014-12-15 | 2015-04-01 | 西安电子科技大学 | Multicast traffic grooming method based on physical topology light-tree correction |
| CN104837172A (en) * | 2015-05-06 | 2015-08-12 | 天津理工大学 | DT-MAODV multicast routing method |
Non-Patent Citations (6)
| Title |
|---|
| 朱华鑫: "sFlow网络流量监测技术探析", 《计算机与数字工程》 * |
| 王雷等: "《计算机网络原理基础教程》", 28 February 2016, 北京：北京理工大学出版社 * |
| 路兆铭等: "《软件定义的无线接入网络结构与关键技术》", 30 September 2015, 北京：北京邮电大学出版社 * |
| 陈敏等: "《软件定义5G网络面向智能服务5G移动网络关键技术探索》", 31 December 2016, 武汉：华中科技大学出版社 * |
| 黄天云: "《视频流量分析与QoS管理》", 31 May 2007, 成都：电子科技大学出版社 * |
| 黄磊等: "Design and Implementation of Multicast Routing System over SDN and sFlow", 《IEEE》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199956A (en) * | 2017-12-05 | 2018-06-22 | 上海大学 | The distributed shared memory construction method of state aware based on SDN |
| CN108762953B (en) * | 2018-05-25 | 2022-03-15 | 连云港杰瑞电子有限公司 | Message queue realizing method |
| CN108762953A (en) * | 2018-05-25 | 2018-11-06 | 连云港杰瑞电子有限公司 | A kind of message queue implementation method |
| CN108881069A (en) * | 2018-06-26 | 2018-11-23 | 新华三云计算技术有限公司 | Retransmission method, device and the server of multicast traffic |
| CN110290069A (en) * | 2019-06-18 | 2019-09-27 | 西安交通大学 | A kind of reliable multicast method for routing under SDN scene |
| CN110290069B (en) * | 2019-06-18 | 2020-08-18 | 西安交通大学 | Reliable multicast routing method in SDN scene |
| CN111918340A (en) * | 2020-07-08 | 2020-11-10 | 河北百亚信息科技有限公司 | WiFi wireless network bandwidth allocation method |
| US11516115B2 (en) | 2020-08-18 | 2022-11-29 | Juniper Networks, Inc. | Weighted multicast join load balance |
| CN114157597A (en) * | 2020-08-18 | 2022-03-08 | 瞻博网络公司 | Weighted multicast join load balancing |
| CN114157597B (en) * | 2020-08-18 | 2024-01-02 | 瞻博网络公司 | Weighted multicast join load balancing |
| US11902148B2 (en) | 2020-08-18 | 2024-02-13 | Juniper Networks, Inc. | Weighted multicast join load balance |
| CN113067727A (en) * | 2021-03-16 | 2021-07-02 | 牛智军 | Cross-regional full-compatibility device based on domestic system and network topology acquisition method thereof |
| CN116233871A (en) * | 2023-01-17 | 2023-06-06 | 广州爱浦路网络技术有限公司 | XR service enhancement method, computer device and storage medium |
| CN116233871B (en) * | 2023-01-17 | 2023-12-15 | 广州爱浦路网络技术有限公司 | XR service enhancement method, computer device and storage medium |
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