CN104243332A - Sub-channel application flow control method based on DPI identification - Google Patents
Sub-channel application flow control method based on DPI identification Download PDFInfo
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Abstract
The invention discloses a sub-channel application flow control method based on DPI identification. The method includes the steps of firstly, identifying the application types of the message flow through the DPI; secondly, using corresponding bandwidth control strategies according to the message flow of different application types; thirdly, dynamically regulating the corresponding bandwidth control strategies in real time according to the current bandwidth occupancy situation of an interface and the requirement of the message flow of different application types for the bandwidth. When the sub-channel application flow control method is applied to a bandwidth router, the bandwidth can be managed, on one hand, the bandwidth of important applications such as webpage browsers and online games can be preferentially ensured, and on the other hand, applications, such as network videos, with the high real-time performance can have the high priority under the condition of the allowable bandwidth.
Description
Technical field
The present invention relates to technical field of the computer network, be specifically related to the control technology of network data flow process.
Background technology
Broadband router is often deployed in the various Network Access Point place such as enterprise, Internet bar, by analyzing the message of turnover network, can determine the application type belonging to message, thus can manage bandwidth according to analysis result.Popular along with the p2p such as pps, sudden peal of thunder network application, makes a large amount of bandwidth be seized by p2p flow, therefore needs certain methods to ensure that user can carry out glibly in the application that the requirement of real-time such as web page access, online game is very high.
Method conventional at present has:
(1) speed limit is carried out according to ip, port numbers and DFI technology.Set up user's black and white lists, to the same speed limit of user in blacklist, to the same not speed limit of user in white list; Carry out preferentially to the port numbers of some game; Identify type of message according to DFI technology, judge whether it is p2p.
(2) manual speed limit is carried out to the p2p flow identified, comprise bt, a sudden peal of thunder, pps etc., after this no longer change.
Above-mentioned two kinds of methods all also exist defect:
Method (1) is the management based on user, underaction; Game port number often changes in addition, identifies inaccurate according to port numbers; And use DFI technology, through constant error, the downloading flow such as ftp are treated as p2p flow.Therefore the less use of the method.
Method (2) determines p2p percentage statically, and this is also irrational, should suitably improve p2p percentage, and suitably should reduce p2p percentage when network congestion when current network is comparatively loose; And the method does not distinguish p2p Web TV and p2p download tool as a sudden peal of thunder etc., this is also irrational, because the real-time of Web TV is certainly contour compared with a sudden peal of thunder, can not it and a sudden peal of thunder be equivalent treat, and higher priority should be enjoyed; The unidentified flow out of other is likely p2p, also will take certain speed limit measure to these flows.
Summary of the invention
The present invention is directed to the problem existing for above-mentioned existing network Row control technology, and a kind of subchannel application traffic control method is provided.This control method is based on DPI recognition technology, be applied in broadband router and can manage bandwidth, make the important application such as browsing page, online game preferentially can obtain Bandwidth guaranteed on the one hand, the stronger application of the real-times such as Internet video can be allowed again when bandwidth allows to enjoy higher priority on the other hand.
In order to achieve the above object, the present invention adopts following technical scheme:
Based on the subchannel application traffic control method that DPI identifies, first described control method utilizes DPI to identify the applicating category of message flow, corresponding bandwidth control strategy is used again according to different application classification message flow, last take situation according to current interface bandwidth, according to different application classification message flow to the requirement of bandwidth, real-time dynamic conditioning respective bandwidth control strategy.
In preferred embodiment of the present invention, when identifying message flow classification, first the feature database of an application layer is safeguarded, DPI is utilized to identify the traffic characteristic of message, by the traffic characteristic of message and feature database are compared, accurately identify the application belonging to message, then obtain the applicating category of message flow.
Further, described message flow classification comprises following a few class:
Category-A: real-time response requires the highest and flow that occupied bandwidth is little;
Category-B: real-time response requires higher, needs to give certain guarantee, but such flow occupied bandwidth is comparatively large, must give certain bandwidth restriction according to current bandwidth usage;
C class: requirement of real-time is not high, but occupied bandwidth is very large;
D class: unknown flow rate.
Further, the control strategy of described message flow is as follows:
For category-A message flow, enjoy the highest priority, as long as bandwidth occupancy is no more than the current total bandwidth of interface, just should not lose;
For B, C class message flow, distribute total bandwidth unitedly, but allow category-B flow to seize the bandwidth of C class flow; And adjust according to the situation that takies of current interface bandwidth the total bandwidth that this two classes flow takies in real time;
D class flow, adopts the strategy of unit speed limit, for the ratio of interface bandwidth and main frame number is multiplied by some multiples again.
Further, described dynamic conditioning respective bandwidth control strategy, namely to different classes of message according to demand and current network conditions use different control strategies: such as lower than 40% in the normal situation of bandwidth utilization rate, so suitably improve category-B, the admissible usage ratio of C class; Bandwidth utilization rate higher than 40% time, recover its normal rates; Nervous in bandwidth, utilization rate is higher when such as likely occurring congested higher than 70% system, suitably reduces the ratio of B/C class flow; , utilization rate nervous in bandwidth higher such as higher than 90% time, significantly reduce the allowed ratio of B, C class flow; Thus realize dynamic conditioning dynamic bandwidth control strategy.
Utilize method provided by the invention, more reasonably can distribute bandwidth, the important application such as web page access, online game is allowed to enjoy limit priority, determine that p2p's takies ratio according to network congestion simultaneously, allow the stronger application of the real-times such as Web TV preferentially seize the bandwidth resources of p2p part, also comparatively reasonably unit speed limit has been done to unknown flow rate in addition.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 adds up the mission flow diagram that recent interface bandwidth takies situation in the present invention;
Fig. 2 is be regularly the mission flow diagram of different channel allocation token buckets in the present invention;
Fig. 3 is the flow chart of message audit task in the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Subchannel application traffic control method based on DPI provided by the invention, it first uses DPI technology to identify message flow applicating category exactly, then to different classes of message according to demand and current network conditions use different control strategies, thus bandwidth is obtained an equitable breakdown.
For the identification of message flow applicating category, the present invention uses DPI to carry out the identification of traffic characteristic, thus identifies message flow applicating category, and concrete scheme is as follows:
The program safeguards the feature database of an application layer, by all traffic characteristics described by the content of message and feature database are compared, accurately can identify the application belonging to message, then determine applicating category.In addition in order to improve message recognition accuracy, some additive methods can be assisted as p2p active probe, conventional application server ip, port numbers and DFI technology etc.That can't be identified by above method is classified as unknown flow rate.
In the solution of the present invention, according to actual conditions, the applicating category of message flow is divided into following a few class:
Category-A, real-time response requires the highest and flow that occupied bandwidth is little, and this kind of flow and most of user be most important to surf the Net and experience directly related, and what should suffer at no time except unit limits is congested.This kind of flow has web page access, online game etc.
Category-B, real-time response requires higher, needs to give certain guarantee, but such flow occupied bandwidth is comparatively large, must give certain bandwidth restriction according to current bandwidth usage.This kind of flow has Online Video, Online Music, Web TV etc.
C class, this kind of flow is generally that requirement of real-time is not high, but occupied bandwidth is very large, as the p2p such as bt, sudden peal of thunder instrument downloading flow.This kind of flow is needed to give larger bandwidth restriction, in order to avoid have influence on category-A and category-B flow.
D class, this kind of flow is generally unknown flow rate.Because cannot determine the classification of flow, so to its blindness speed limit, but can not can not let alone occupied bandwidth, the way therefore adopted is to its unit speed limit.
For above-mentioned different classes of flow, use different control strategies, specific as follows:
For category-A flow, this kind of flow enjoys the highest priority, as long as bandwidth occupancy is no more than the current total bandwidth of interface, just should not lose.
For B, C class flow, this two classes flow has similarity, has difference again.Therefore can distribute total bandwidth unitedly for them, but due to the requirement of real-time of category-B flow higher, category-B flow therefore should be allowed to seize the bandwidth of C class flow.In addition because this two classes flow is all larger to taking of bandwidth, therefore should suitably adjust according to the situation that takies of current interface bandwidth the total bandwidth that this two classes flow takies, suitably can improve ratio when interface bandwidth is comparatively loose time.
For D class flow, owing to being unknown flow rate, be likely important flow, be also likely that p2p downloads, therefore should adopt the strategy of unit speed limit to it, the ratio being generally interface bandwidth and main frame number is multiplied by some multiples again.
For above-mentioned subchannel application traffic control, the present invention is further illustrated by such as next instantiation.
This example, applies the solution of the present invention in broadband router.Whole scheme implementation comprises three part: partA: task of timer 1, is responsible for the congestion situation of the recent interface of statistics; PartB: task of timer 2, is responsible for different channel allocation flow bucket; PartC: message audit task.
Wherein, partA:
Task of timer 1, time-out time is 2s, and main task is that the recent interface bandwidth of statistics takies situation.This task specific works following (participation Fig. 1): represent with limitlevel the number of times that interface bandwidth is congested, do every 2s and once add up, if current interface is congested just add 1, if interface loosely just subtracts 1.The nearest bandwidth resources of the larger expression of limitlevel value are more nervous, if the value of limitlevel is 0, illustrate that nearest bandwidth occupancy is little.
partB：
Task of timer 2, time-out time is 200ms, is regularly mainly different channel allocation token buckets, distribute with the form of byte, such as altogether distribute 2000 bytes for passage 1, just represent in this passage and by the flow of 2000 bytes, just can only abandon if message length exceedes remaining flow.This task specific works following (participation Fig. 2):
1. interface upload and download bandwidth was multiplied with the assignment of traffic time interval (giving tacit consent to 200ms), calculates total byte number up and down of the upload and download of primary distribution.
2. give tacit consent to 70% according to the intelligent Flow Control percentage smart_percent(of manual configuration, higher than this ratio, can think that interface bandwidth is nervous, likely congested, B, C class flow proportional need be reduced) and current interface congestion situation, dynamically calculate total percentage consum_percent that current category-B and C class flow bandwidth take:
If the value of limitlevel is 0, illustrate that nearest bandwidth occupancy is little, then consum_percent=smart_percent;
If current interface is relatively looser simultaneously, a ratio suitably can also be multiplied by as being multiplied by 1.1 times;
If the value of limitlevel is greater than 0, then the size according to limitlevel is suitably given a discount to consum_percent, is such as multiplied by the coefficient of 0.8.
3. by the most of ratio in consum_percent as wherein 60%(and consum_percent*0.6) keep for category-B flow, remaining leaves C class flow for, obtains the percentage p2p_percent of C class flow like this.C class flow can only take the bandwidth of p2p_percent part simultaneously, and category-B flow can take the bandwidth of (consum_percent-p2p_percent), and (consum_percent-p2p_percent) is greater than p2p_percent, namely category-B flow allows the ratio of ratio C class flow to want large, makes category-B flow have higher priority thus.
4. interface upload and download bandwidth is multiplied with the assignment of traffic time interval (giving tacit consent to 200ms) by up with down(, total byte number up and down of the upload and download of primary distribution can be calculated) distribute to category-A flow, i.e. A channel, be added to bytes_up, in bytes_down, here bytes_up, bytes_down are respectively the flow amount uploaded, download allowing to pass through of A channel; The upload and download total bytes up and down being multiplied by B, C flow of this sub-distribution that consum_percent obtains distributes to channel B, be added to videobytes_up, in videobytes_down, here videobytes_up, videobytes_down are respectively the flow amount uploaded, download allowing to pass through of channel B.Up and down is multiplied by the upload and download byte number that p2p_percent obtains the C flow of this sub-distribution, be added to p2pbytpes_up, in p2pbytes_down, p2pbytpes_up, p2pbytes_down are respectively the flow amount uploaded, download allowing to pass through of C-channel here.
partC：
Message audit task, this task specific works following (with reference to figure 3):
1., when a message enters router, first identify the applicating category belonging to this message by DPI technology.
2. if category-A flow, then according to uploading or down loading updating bytes_up or bytes_down.If category-B flow, then upgrade videobytes_up or videobytes_down.If C class flow, then upgrade p2pbytpes_up or p2pbytes_down.
When upgrading, the total bytes using current channel to be assigned to deducts the byte number of current message, is just lost by this message if subtracted not.So just limit the bandwidth occupancy ratio of p2p and Internet video class flow, allow again Internet video can seize the flow of p2p simultaneously.
If this message is D class flow in addition, i.e. unknown flow rate, then walk the passage of unit speed limit, when exceeding unit limiting bandwidth, just lost by this message.
From above-mentioned example, utilize the broadband router of above-mentioned application the present invention program can manage bandwidth in places such as Internet bars: to make the important application such as browsing page, online game can preferentially obtain Bandwidth guaranteed on the one hand, the stronger application of the real-times such as Internet video must be allowed again when bandwidth allows to enjoy higher priority on the other hand.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1. based on the subchannel application traffic control method that DPI identifies, it is characterized in that, first described control method utilizes DPI to identify the applicating category of message flow, corresponding bandwidth control strategy is used again according to different application classification message flow, last take situation according to current interface bandwidth, according to different application classification message flow to the requirement of bandwidth, real-time dynamic conditioning respective bandwidth control strategy.
2. the subchannel application traffic control method identified based on DPI according to claim 1, it is characterized in that, when identifying message flow classification, first the feature database of an application layer is safeguarded, DPI is utilized to identify the traffic characteristic of message, by the traffic characteristic of message and feature database being compared, accurately identifying the application belonging to message, then obtaining the applicating category of message flow.
3. the subchannel application traffic control method identified based on DPI according to claim 1 and 2, it is characterized in that, described message flow classification comprises following a few class:
Category-A: real-time response requires the highest and flow that occupied bandwidth is little;
Category-B: real-time response requires higher, needs to give certain guarantee, but such flow occupied bandwidth is comparatively large, must give certain bandwidth restriction according to current bandwidth usage;
C class: requirement of real-time is not high, but occupied bandwidth is very large;
D class: unknown flow rate.
4. the subchannel application traffic control method identified based on DPI according to claim 3, it is characterized in that, the control strategy of described message flow is as follows:
For category-A message flow, enjoy the highest priority, as long as bandwidth occupancy is no more than the current total bandwidth of interface, just should not lose;
For B, C class message flow, distribute total bandwidth unitedly, but allow category-B flow to seize the bandwidth of C class flow; And adjust according to the situation that takies of current interface bandwidth the total bandwidth that this two classes flow takies in real time;
D class flow, adopts the strategy of unit speed limit, for the ratio of interface bandwidth and main frame number is multiplied by some multiples again.
5. the subchannel application traffic control method identified based on DPI according to claim 1, it is characterized in that, described dynamic conditioning respective bandwidth control strategy, namely to different classes of message according to demand and current network conditions use different control strategies: lower than 40% in the normal situation of bandwidth utilization rate, so suitably improve category-B, the admissible usage ratio of C class; Bandwidth utilization rate higher than 40% time, recover its normal rates; Nervous in bandwidth, utilization rate is higher when such as likely occurring congested higher than 70% system, suitably reduces the ratio of B/C class flow; , utilization rate nervous in bandwidth higher such as higher than 90% time, significantly reduce the allowed ratio of B, C class flow; Thus realize dynamic conditioning dynamic bandwidth control strategy.
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| CN106385386A (en) * | 2016-08-31 | 2017-02-08 | 成都飞鱼星科技股份有限公司 | Application servo-actuated intelligent floe control method |
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| WO2017092275A1 (en) * | 2015-11-30 | 2017-06-08 | 乐视控股（北京）有限公司 | Router bandwidth management method and device, and router |
| TWI629877B (en) * | 2016-12-09 | 2018-07-11 | 中華電信股份有限公司 | Intelligent scheduling system for optical buffer front end optical buffer |
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| CN110753007A (en) * | 2019-10-23 | 2020-02-04 | 深圳市友华软件科技有限公司 | QoS-based flow strategy configuration method and device |
| CN112019446A (en) * | 2020-08-28 | 2020-12-01 | 北京浪潮数据技术有限公司 | Interface speed limiting method, device, equipment and readable storage medium |
| CN112087398A (en) * | 2020-08-28 | 2020-12-15 | 西安万像电子科技有限公司 | Video frame sending method, device, equipment and storage medium |
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Application publication date: 20141224 |