CN105656799A - Scheduling method based on business features in SDN network - Google Patents
Scheduling method based on business features in SDN network Download PDFInfo
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- CN105656799A CN105656799A CN201610013986.5A CN201610013986A CN105656799A CN 105656799 A CN105656799 A CN 105656799A CN 201610013986 A CN201610013986 A CN 201610013986A CN 105656799 A CN105656799 A CN 105656799A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
- H04L47/2433—Allocation of priorities to traffic types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/52—Queue scheduling by attributing bandwidth to queues
Abstract
The invention discloses a scheduling method based on business features in an SDN network, and belongs to the technical field of communication. Balancing the loads of communication links is taken as a target; forwarding paths are adjusted through comparing the bandwidth utilization rates of the links; the target of rationally using the network resources is realized; rational priorities are designed for the business requests according to the QoS features of the business requests; high utilization rates of the system resources are ensured; moreover, better experience degrees are provided for a user; and the quality of service of the user is improved.
Description
Technical field
The present invention discloses under a kind of SDN the scheduling method based on business feature, belongs to communication technical field.
Background technology
SDN, SoftwareDefinedNetworking, software definition network, it it is a kind of new network innovation framework of Emulex network, it it is a kind of implementation of network virtual, its core technology OpenFlow is by separating network equipment surface and data surface, thus achieves the flexible control of network flow, makes network become more intelligent as pipeline. SDN mainly comprises SDN controller and OverFlow exchange board. SDN controller, as a kind of operating system of network, is in charge of, strategy formulation etc., guarantees that network is intelligent with this. OverFlow exchange board is responsible for report chain line state, and forwards business data packet. But the traffic transport between network is very big, and it is often unbalanced to connect the link rate of utilization between each exchange board, system scheduling is improper will bring serious link bandwidth dilatation pressure, existing resource allocation methods mainly analyzes the overall situation with network optimization theory, as taking minimumization communication link load, maximum resource utilization ratio etc. as target. But from the angle of user, different business has different quality of service requirements. And the present invention provides under a kind of SDN the scheduling method based on business feature, taking balanced communication link load as target, by comparing the bandwidth usage rate of link, regulate and forward path, reach the target of reasonable employment network resource, it is possible to according to the QoS feature of service request, for the priority that it is reasonable in design, while ensureing system resource high utilization rate, for user provides better Experience Degree, it is to increase the service quality of user.
Summary of the invention
The present invention provides under a kind of SDN the scheduling method based on business feature, according to the QoS requirement of different business, is the priority that customer service request is reasonable in design, provides better user experience with this; Simultaneously balanced as target taking link bandwidth load in system, by comparing the utilization ratio of link bandwidth, to consider to exchange time delay simultaneously, dynamic adjustments forwards path, reaches the object of reasonable employment network resource.
The concrete scheme that the present invention proposes is:
Based on the scheduling method of business feature under a kind of SDN:
QoS characteristic according to customer service request, is classified, and is inhomogeneity business formulation priority;
Arrange customer service request according to priority orders, submit to SDN switch processes;
Exchange board reports service queue information and link status information in real time to SDN controller, SDN controller is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Exchange board issues stream table according to SDN controller, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
The described QoS characteristic according to customer service request, being classified, and be inhomogeneity business formulation priority, priority is for representing the weight of every class business, affect by dynamic adjusting factor, by increasing or reduce the scheduling that dynamic adjusting factor carries out the transmission of service request.
In the described QoS characteristic according to customer service request, delay constraint is classified, and is inhomogeneity business formulation priority, then the weight table of every class business is directly proportional to dynamic adjusting factor illustrated as priority, and the maximum delay with every class business is inversely proportional to.
The detailed process issuing stream table formulated by described SDN controller: SDN controller is first followed successively by it according to the height of service priority and formulates forwarding strategy, many transmission paths are selected for it again according to the requirement of business data packet object address, the link bandwidth utilization rate average met in selected path is less than the threshold value of setting, choose the path that in path, total exchange number of times is few, it is determined that issue stream table.
Exchange board is to SDN controller feedback information as do not sent successfully then to forward corresponding business data packet, and the forwarding flow table that please look for novelty, applies for new forwarding path.
After the corresponding business data packet success of described forwarding, upgrading service queue buffer memory information, exchange board is to the utilization ratio of the concrete link of SDN controller report simultaneously.
Based on a dispatching system for business feature under SDN, it is applied to described method, comprises service management module, service queue, switch module, SDN controller module,
Service management module, according to the QoS characteristic of customer service request, is classified, and is inhomogeneity business formulation priority;
Service queue arranges customer service request according to priority orders, submits to the process of SDN switch module;
Switch module reports service queue information and link status information in real time to SDN controller module, SDN controller module is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Switch module issues stream table according to SDN controller module, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
The usefulness of the present invention is:
The present invention provides under a kind of SDN the scheduling method based on business feature, taking balanced communication link load as target, by comparing the bandwidth usage rate of link, regulate and forward path, reach the target of reasonable employment network resource, it is possible to according to the QoS feature of service request, for the priority that it is reasonable in design, while ensureing system resource high utilization rate, for user provides better Experience Degree, it is to increase the service quality of user.
Accompanying drawing explanation
Fig. 1 system framework schematic diagram of the present invention;
Fig. 2 the inventive method schematic flow sheet.
Embodiment
Based on a dispatching system for business feature under SDN, it is applied to described method, comprises service management module, service queue, switch module, SDN controller module,
Service management module, according to the QoS characteristic of customer service request, is classified, and is inhomogeneity business formulation priority;
Service queue arranges customer service request according to priority orders, submits to the process of SDN switch module;
Switch module reports service queue information and link status information in real time to SDN controller module, SDN controller module is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Switch module issues stream table according to SDN controller module, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
Based on the scheduling method of business feature under a kind of SDN:
QoS characteristic according to customer service request, is classified, and is inhomogeneity business formulation priority;
Arrange customer service request according to priority orders, submit to SDN switch processes;
Exchange board reports service queue information and link status information in real time to SDN controller, SDN controller is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Exchange board issues stream table according to SDN controller, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
Utilizing said system, method and summary of the invention, the present invention will be further described by reference to the accompanying drawings.
(1) service management module is divided into K class the pending service request such as current according to delay constraint in QoS characteristic, and is each class setting priority ��k, with Tk,maxRepresent the maximum delay that kth class business can be tolerated, then the weight table of every class business is illustrated as ��k=��/Tk,max, wherein �� represents dynamic adjusting factor;
If link produces congested, then reduce the value of ��, the service priority submitted to rearward is reduced, allow high priority data transmission forward in service queue, in order to avoid waiting that time delay is excessively long;
Owing to the maximum delay of business is pre-set, if certain class business needs to strengthen transmission in certain time section, then the value that can increase �� carrys out flexible dispatching;
(2) service queue is according to the service priority reported, and user is asked to report to switch module by the fair algorithm of adoption rate, such as, and the average waiting delay in gap t during statisticsThen the transmission priority of corresponding business represents and is
(3) the service queue information collected is submitted to SDN controller module by switch module, is obtained the bandwidth usage rate �� of i-th link in gap t-1 in upper a period of time by network traffic sampling simultaneouslyi,t-1, report SDN controller;
(4) SDN control module is taking balanced link bandwidth as target, formulates forwarding flow table, wherein;
According to the height of service priority, it is followed successively by it and formulates forwarding strategy, according to the requirement of business data packet object address, for often kind of service request selects N bar to forward path, if comprising M telephone net node on the n of path, and the average utilization ratio upper limit that link bandwidth can bear is ��th, then the path selected need to meetWherein ��i,t-1The for the moment bandwidth usage rate of link i in gap t-1 in expression;
If the link being connected with exchange board m when t-1 the bandwidth usage rate in gap higher than set threshold gammath, then exchange board m is avoided when selecting to forward path;
In order to reduce exchange time delay, select, when formulating stream table, the scheme that in transmission route, exchange board overall number is few;
(5) according to issuing, stream table forwards corresponding business data packet to switch module, wherein;
If stream table requirement can be met, then business data packet is forwarded to corresponding exchange board place; If forwarding unsuccessful, then feed back an error message and to SDN controller and inform its wrong type occurred, apply for new forwarding path;
When, after the success of business datum Packet forwarding, informing business queue upgrades buffer memory information, simultaneously to the utilization ratio �� of i-th link in gap t during SDN controller reporti,t��
Utilize aforesaid method, according to the QoS feature of service request, it is the priority that it is reasonable in design, taking balanced communication link load as target, by comparing the bandwidth usage rate of link, regulate and forward path, reach the target of reasonable employment network resource, it is to increase the service quality of user.
Claims (7)
1., based on a scheduling method for business feature under SDN, it is characterized in that
QoS characteristic according to customer service request, is classified, and is inhomogeneity business formulation priority;
Arrange customer service request according to priority orders, submit to SDN switch processes;
Exchange board reports service queue information and link status information in real time to SDN controller, SDN controller is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Exchange board issues stream table according to SDN controller, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
2. method according to claim 1, it is characterized in that the QoS characteristic according to customer service request, classified, and be inhomogeneity business formulation priority, priority is for representing the weight of every class business, affect by dynamic adjusting factor, by increasing or reduce the scheduling that dynamic adjusting factor carries out the transmission of service request.
3. method according to claim 2, it is characterized in that in the QoS characteristic according to customer service request, delay constraint is classified, and be inhomogeneity business formulation priority, then the weight table of every class business is directly proportional to dynamic adjusting factor illustrated as priority, and the maximum delay with every class business is inversely proportional to.
4. method according to the arbitrary item of claim 1-3, it is characterized in that described SDN controller is formulated the detailed process issuing stream table and is: SDN controller is first followed successively by it according to the height of service priority and formulates forwarding strategy, many transmission paths are selected for it again according to the requirement of business data packet object address, the link bandwidth utilization rate average met in selected path is less than the threshold value of setting, choose the path that in path, total exchange number of times is few, it is determined that issue stream table.
5. method according to claim 4, exchange board is to SDN controller feedback information as do not sent successfully then to it is characterized in that forwarding corresponding business data packet, and the forwarding flow table that please look for novelty, applies for new forwarding path.
6. method according to claim 5, after it is characterized in that the corresponding business data packet success of described forwarding, upgrades service queue buffer memory information, and exchange board is to the utilization ratio of the concrete link of SDN controller report simultaneously.
7., based on a dispatching system for business feature under SDN, it is characterized in that being applied to the method described in the arbitrary item of 1-6, comprise service management module, service queue, switch module, SDN controller module,
Service management module, according to the QoS characteristic of customer service request, is classified, and is inhomogeneity business formulation priority;
Service queue arranges customer service request according to priority orders, submits to the process of SDN switch module;
Switch module reports service queue information and link status information in real time to SDN controller module, SDN controller module is based on the target of network bandwidth load balancing, the priority of balance service request and link status information are each service selection optimal transmission link, formulate and issue stream table;
Switch module issues stream table according to SDN controller module, finds the exchange board meeting regulation goal in available exchange network, forwards corresponding business data packet.
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Cited By (14)
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| CN106713174A (en) * | 2016-12-15 | 2017-05-24 | 中国科学院沈阳自动化研究所 | Real-time scheduling method and system of industrial control network based on dynamic priority |
| CN107332788A (en) * | 2017-06-08 | 2017-11-07 | 中国电力科学研究院 | A kind of support method and system for being used to transmit wide area information in power dispatching center |
| CN107689942A (en) * | 2016-08-04 | 2018-02-13 | 中兴通讯股份有限公司 | Method for processing business and device |
| CN107872479A (en) * | 2016-09-26 | 2018-04-03 | 中国电信股份有限公司 | Cloud management platform and controller integrated approach and system and correlation module |
| CN107947953A (en) * | 2016-10-13 | 2018-04-20 | 中华电信股份有限公司 | Software definition experiences quality measurements system |
| CN108134749A (en) * | 2016-12-01 | 2018-06-08 | 财团法人工业技术研究院 | Packet transfer method, packet transfer device and non-transitory computer readable medium |
| 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 |
| CN109039943A (en) * | 2018-09-14 | 2018-12-18 | 迈普通信技术股份有限公司 | Flow allocating method, apparatus, network system and SDN controller |
| CN109743259A (en) * | 2018-12-24 | 2019-05-10 | 中国联合网络通信集团有限公司 | A kind of traffic scheduling method and device of network |
| CN110365580A (en) * | 2019-07-26 | 2019-10-22 | 新华三大数据技术有限公司 | Service quality scheduling method, device, electronic equipment and computer readable storage medium |
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| CN111147370A (en) * | 2016-07-08 | 2020-05-12 | 华为技术有限公司 | Method and control device for determining forwarding path |
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| CN107689942A (en) * | 2016-08-04 | 2018-02-13 | 中兴通讯股份有限公司 | Method for processing business and device |
| CN107872479B (en) * | 2016-09-26 | 2021-06-18 | 中国电信股份有限公司 | Cloud management platform and controller integration method and system and related modules |
| CN107872479A (en) * | 2016-09-26 | 2018-04-03 | 中国电信股份有限公司 | Cloud management platform and controller integrated approach and system and correlation module |
| CN107947953A (en) * | 2016-10-13 | 2018-04-20 | 中华电信股份有限公司 | Software definition experiences quality measurements system |
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| CN108134749A (en) * | 2016-12-01 | 2018-06-08 | 财团法人工业技术研究院 | Packet transfer method, packet transfer device and non-transitory computer readable medium |
| CN108134749B (en) * | 2016-12-01 | 2021-07-16 | 财团法人工业技术研究院 | Packet transfer method, packet transfer device and non-transitory computer readable medium |
| CN106713174B (en) * | 2016-12-15 | 2019-08-20 | 中国科学院沈阳自动化研究所 | A kind of real-time scheduling method and system of the industrial control network based on dynamic priority |
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| 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 |
| CN107332788B (en) * | 2017-06-08 | 2024-03-19 | 中国电力科学研究院 | Guarantee method and system for transmitting wide-area power scheduling data |
| CN107332788A (en) * | 2017-06-08 | 2017-11-07 | 中国电力科学研究院 | A kind of support method and system for being used to transmit wide area information in power dispatching center |
| CN109039943A (en) * | 2018-09-14 | 2018-12-18 | 迈普通信技术股份有限公司 | Flow allocating method, apparatus, network system and SDN controller |
| CN109039943B (en) * | 2018-09-14 | 2022-03-18 | 迈普通信技术股份有限公司 | Flow allocation method and device, network system and SDN controller |
| CN109743259A (en) * | 2018-12-24 | 2019-05-10 | 中国联合网络通信集团有限公司 | A kind of traffic scheduling method and device of network |
| CN109743259B (en) * | 2018-12-24 | 2022-08-02 | 中国联合网络通信集团有限公司 | Network traffic scheduling method and device |
| CN110365580A (en) * | 2019-07-26 | 2019-10-22 | 新华三大数据技术有限公司 | Service quality scheduling method, device, electronic equipment and computer readable storage medium |
| CN110365580B (en) * | 2019-07-26 | 2022-02-22 | 新华三大数据技术有限公司 | Service quality scheduling method and device, electronic equipment and computer readable storage medium |
| CN110912736A (en) * | 2019-11-13 | 2020-03-24 | 中国联合网络通信集团有限公司 | Resource allocation method and device |
| CN112152935B (en) * | 2020-09-01 | 2022-05-17 | 中国联合网络通信集团有限公司 | Method and device for determining transmission path |
| CN112152935A (en) * | 2020-09-01 | 2020-12-29 | 中国联合网络通信集团有限公司 | Method and device for determining transmission path |
| CN112565008A (en) * | 2020-11-26 | 2021-03-26 | 深信服科技股份有限公司 | Network monitoring method, device and related equipment |
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Application publication date: 20160608 |