CN101964754A - Point to point (P2P) service identification-based quality of service (QoS) routing method - Google Patents
Point to point (P2P) service identification-based quality of service (QoS) routing method Download PDFInfo
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Abstract
The invention discloses a P2P service identification-based QoS routing method. In the method, a P2P service is identified by using a character process identification method, and a differentiated services code point (DSCP) value of the identified P2P service is marked, so that the DSCP values of the P2P service with various requirements are classified; and on the basis of the DSCP value classification, QoS routing is performed by using a distribution QoS routing method to differentially shunt QoS routes so as to solve the problem of network blockage caused by lasting increment of the network flow and realize the creditability of a network. The method has the advantages that: routes which can meet the requirements of different networks can be selected according to the P2P service and concrete network conditions; and realization is simple, and maintenance and management are easy. And the method can be applied to a core network.
Description
Technical field
The present invention relates to a kind of QoS route selection method, belong in the network communications technology field network service quality based on the P2P traffic identification based on the P2P traffic identification.
Background technology
QoS (Quality of Service, service quality), refer to that network provides a kind of ability of higher Priority Service, comprise dedicated bandwidth, shake control and postpone (being used for real-time and interactive flow situation), the improvement of packet loss and the specified network flow under different WAN, LAN and the MAN technology etc., guarantee that simultaneously the priority that provides for every kind of flow can not hinder the process of other flow.QoS is a kind of security mechanism of network, is with a kind of technology that solves problems such as network delay and obstruction.Under normal circumstances,, do not need QoS, use, or E-mail is provided with etc. such as Web if network only is used for specific timeless application system.But it is just very necessary to key application and multimedia application.When network over loading or when congested, QoS can guarantee that the important service amount is not postponed or abandons, and guarantees the efficient operation of network simultaneously.
Simultaneously, because network technology is maked rapid progress, nowadays, in the Internet network based on ICP/IP protocol, more and more P2P(peer-to-peer is point-to-point) the professional adding wherein.For example, in numerous IP Packet Services, the P2P business begins to occupy more and more important position.The P2P business is widely used in aspects such as instant messaging, file-sharing, Streaming Media, and according to statistics, the P2P business occupies the flow of Internet service 60% ~ 80%.But because the professional not unified standard of P2P, self lacks management and controlling mechanism, and the P2P service traffics have bandwidth and characteristic such as engulf, and cause simple network upgrade dilatation can't satisfy the needs that network traffics increase, the decline that has brought service quality thus to network.Simultaneously, BE(best-effort, do one's best) service is still a kind of service type main among the present Internet, all are grouped in the network and are put on an equal footing, lack effective management, local congested frequent generation, the packet loss and the data dithering that cause network performance to descend, use, the downslide that this has further aggravated network service quality has increased the insincere property of network.
Summary of the invention
Technical problem to be solved by this invention is at a large amount of IN services, and particularly the problem that glides of the network service quality that causes of P2P business realizes that the QoS of P2P business ensures.
The present invention adopts following technical scheme for solving the problems of the technologies described above:
A kind of QoS method for routing based on the P2P traffic identification comprises the steps:
Steps A when the business data packet grouping arrives route platform, is at first shunted business, adopts feature process method of identification that the data flow of entry port is carried out the P2P traffic identification;
A-1 when the type of service that is identified belongs to general business, selects for use conventional routing policy to carry out data forwarding;
A-2 when the type of service that is identified belongs to P2P when professional, adopts step B the P2P business to be carried out P2P traffic identification and flow control to step D;
Step B to the data flow that belongs to the P2P business that steps A identifies, according to the process feature of each P2P business, sets up P2P service feature process class library;
Step C according to the requirement of each P2P business to network parameter, to each P2P traffic set corresponding D SCP value, classifies to each P2P business according to the DSCP value of setting then;
Step D adopts P2P service traffics Control Software, and the speed that the P2P business is entered the datagram of route platform is controlled; Described P2P service traffics Control Software adopts flow control software FluxEye;
Step e adopts the DSCP grader that the DSCP value of each P2P business is discerned, and then the professional branch of each P2P is gone into corresponding routed port waiting list;
Step F, route platform is carried out corresponding routing update according to distributed QoS routing algorithm, described distributed QoS routing algorithm all is provided with corresponding update time to each waiting list, the all corresponding corresponding routing table structure of each waiting list, described routing table structure adopts multirouting list structure in the tactful route;
Step G is transmitted by weighting scheduler schedules to the port in the corresponding routing table for the P2P business in each waiting list;
Step H adopts meter that the P2P business datum newspaper that step G transmits is carried out the flow rate real-time statistics, and in meter setting data flow rate threshold value, this data traffic rate-valve value is set according to the actual conditions of route platform processor; When the data traffic speed of real-time statistics during greater than preset threshold, the through-rate adjuster is regulated the P2P business that enters route platform, and restriction enters the service traffics of route platform;
Step I after the data flow of P2P business is transmitted successfully, returns steps A.
The present invention adopts technique scheme to have following technique effect:
At first, adopt the QoS route selection method based on the P2P traffic identification of the present invention, can discern all kinds of business accurately and fast, can discern various P2P business, comprise various texts, voice, image, video network flow.After the P2P business carried out the DSCP key words sorting, if follow-up router is supported the DSCP mark and is supported identical classification policy, then only need watch mark and handle this grouping, can omit traffic identification and sort module, reduce classification and handle and computation complexity, to improve processing speed.
Secondly, adopt queue scheduling management algorithm and QoS routing algorithm in the route platform, can realize different requirements according to service parameter, realize different routing forwarding, can make full use of idle route point like this, to solve the problem of blocking up that existing network is caused under the shortest path first operation, to improve transmission quality.
Generally, the present invention divides different service class according to different QoS routing policy, and gives each service class packet sign DSCP value, and the configurable credible route of implementation strategy reaches the purpose of Differentiated Services.
The present invention sets in advance the professional corresponding multi-service route selection strategy at the different P2P of diverse network requirement, and the strategy of QoS multi-service route herein adopts a kind of improved distributed QoS routing algorithm to carry out route; This algorithm is the improvement algorithm to traditional distributed QoS route, in the inundation process, transmit request package conditionally, and according to time delay, delay variation, bandwidth availability ratio, conditions such as packet loss have all been safeguarded certain network state information at each node, so that calculate the forwarding condition when transmitting bag, realize the part forwarding, thereby reduce overhead and shorten time delay; Forwarding request package with good conditionsi can reduce communication complexity, has reduced under the situation of time delay and has selected optimal path; It has not only inherited the advantage of traditional distributed QoS routing algorithm, and under large scale network and heavy load situation less time delay and the higher bandwidth admittance rate of being connected can be arranged; Can from the routed path that satisfies route conditions, select the routed path that satisfies various P2P business needs according to this routing policy thus.
Description of drawings
Fig. 1 is P2P traffic identification and flow control methods flow chart.
Fig. 2 is the QoS route platform schematic diagram based on the P2P traffic identification.
Fig. 3 is a kind of distributed QoS routing algorithm flow chart.
Embodiment
With reference to the accompanying drawings technical scheme of the present invention is described in further detail below.
The concrete enforcement of system is divided into two parts, is respectively based on the system step of P2P traffic identification and adaptive-flow control with based on the QoS route platform system step of P2P traffic identification.
1,
System step based on P2P traffic identification and adaptive-flow control
At first discern and control entering flow, promptly according to the tactical management demand P2P class of service is discerned, recognition methods used herein is a feature process method of identification, the present invention proposes a kind of P2P method for recognizing flux based on the feature process.Process can be regarded as the once operation activity of program on certain data acquisition system with certain standalone feature usually.If the existence of certain process can show an application program and just move, so just can claim that this process is the feature process of application program in system.If these feature processes have been opened tcp port and udp port simultaneously, so just can judge that the flow that these ports produce is the P2P flow.
As shown in Figure 1, concrete P2P traffic identification and flow control methods flow chart among the present invention.The prerequisite of this recognition methods is to set up a P2P feature process storehouse.P2P feature process storehouse is the set of P2P feature process name, the feature process name of a P2P application program of it each correspondence.By to the process analysis of business and then whether differentiate the P2P business, every kind of P2P business differs to the requirement of network, the process feature that shows also has nothing in common with each other, can set up the process storehouse of classification at this point, each P2P business and corresponding process storehouse are carried out correspondence, and then determine the P2P business that the networking requirement is differed, professional and just different such as the P2P that is had relatively high expectations in the broadband to the higher P2P business process feature of delay requirement.
How to determine that certain process is the P2P process, mainly utilize following two kinds of methods to determine:
For disclosed, well-known P2P application program, for example: QQ, BitTorrent, sudden peal of thunder or the like, obtain by following several steps:
(1), first operation process enumeration procedure, obtain the process name of all operations in the current client computer;
(2), operation P2P program, the process of reruning enumeration procedure is obtained the process name of all operations in client computer this moment;
(3), the process name that obtains for twice before and after relatively, after once just can be defined as P2P feature process than the preceding process that once has more.
For can't also being defined as the P2P process if this process also meets some P2P feature with the definite process of said method.For example certain process is not only used tcp port but also use udp port, just can tentatively confirm as the P2P suspicious process, then be defined as P2P feature process according to the suspicious process decision plan after, add to automatically in the feature process storehouse by system.
In a coupling storehouse, deposit the professional corresponding broadband of each P2P in advance, postpone, delay jitter, the process feature of P2P stream packet features such as packet loss, the P2P business that enters the coupling storehouse is carried out the process characteristic matching, determine the concrete type of service of this P2P Business Stream, and mark corresponding D SCP(Differentiated Services Code Point, differentiated service code point) value.Because various P2P business are different to various parameter requests, as bandwidth, time delay, delay variation, packet loss etc. can be classified to business in view of the above.So give the grade of service of each class of service to miscellaneous service, set corresponding D SCP value.At present a lot of network equipments is supported DSCP, and the COS of compatible P priority.Control with P2P service traffics Control Software then, control the speed of the datagram that enters the QoS route platform with this.
On the basis of correct identification P2P flow, can adopt the method for the concrete process flow amount of restriction to control the P2P flow.Method is utilized existing a flow control software " FluxEye " exactly, when system development, the packing of this software is added in whole system, takes place to call this software when congested at network.Owing in the identifying of P2P flow, set up a feature process storehouse, therefore, when calling software, ready-made feature process storehouse can be loaded in the configuration of " FluxEye " at every turn.Its operation principle is exactly each process of moving in the supervisory control system, and according to the value of setting to P2P process speed limit.
P2P traffic identification and flow control are by the policy manager unified management, at this moment the service class of the statistical value of strategy that provides according to customizable policy manager and present rate adjuster after to identification carried out adaptive flow control, slowing down bursts of traffic, and abandon exception flow of network.
2, based on the QoS route platform system step of P2P traffic identification
Existing network is followed basic routing algorithm, and promptly shortest path first causes the network shortest path to be can't bear the heavy load for a long time by approach thus, causes network performance to descend, and influences transmission quality, and all the other paths that do not play a role are then idle relatively.This forwarding mechanism of doing one's best makes network layer can't guarantee the requirement of transmission quality reliability.Thus, the present invention proposes a kind of design of improved QoS route platform, this platform can be according to the various P2P business features that network traffics comprised, be that every kind of business is different to parameter requests such as packet loss, bandwidth, time delay, delay variations, every kind of IN service that enters route platform is classified.Business Stream then corresponding service carried out the QoS route selection, so that can be transmitted by qualified path.
As shown in Figure 2, the principle that the P2P traffic identification is classified later on is as follows: thus the DSCP value of the major parameter difference mark that miscellaneous service requires is different, classifies according to the mark value of front DSCP here.
Sorting result is that the different business of various parameters enters each associated queue, and wait weighting scheduler is dispatched forwarding, and the weight of weighting scheduler depends on the required bandwidth value size of each service class; Herein also can be as required with other parameters of its furnishing with the decision weight.The data traffic meter is set with statistics speed in the back of weighting scheduler, and in the data traffic meter, set certain threshold value, but when data traffic during greater than this threshold value the through-rate adjuster regulate the data flow that enters route platform, to reach the adaptive control of route platform.
In order to satisfy the purpose of multiple Route Selection, promptly select route-QoS route according to its parameter for each business, the present invention has designed many formations and multirouting list structure.The business data flow that each DSCP value is different carries out formation according to corresponding Queue Management Algorithm to be selected, and each is the corresponding corresponding routing table of formation initiatively, and the renewal of routing table is upgraded by corresponding QoS routing algorithm.
As shown in Figure 3, for the QoS routing algorithm, the present invention adopts a kind of improved distributed QoS routing algorithm, when this algorithm is transmitted request package at intermediate node, carries out transmitted test according to the accumulative total time delay, has reduced communication complexity.In destination node, from feasible path, select the parameter optimal path to beam back according to certain strategy and reply.In the inundation process, transmit request package conditionally, and according to time delay, delay variation, bandwidth availability ratio, conditions such as packet loss have all been safeguarded certain network state information at each node, so that calculate the forwarding condition when transmitting bag, realize the part forwarding, thereby reduce overhead and shorten time delay.Forwarding request package with good conditionsi can reduce communication complexity, has reduced under the situation of time delay and has selected optimal path.It has not only inherited the advantage of traditional distributed QoS routing algorithm, and under large scale network and heavy load situation less time delay and the higher bandwidth admittance rate of being connected can be arranged.
Such design can reach different business is transmitted according to different routes, makes the excess load of shortest path be released, and idle link is able to abundant use, thereby the transmission quality that has guaranteed Business Stream is improved, and realizes the reliability of network.
The present invention proposes the existing route platform is changed, and router is carried out queue management and dispatching management, and carry out routing by the QoS routing algorithm, and the different P2P business of various parameter requests is carried out suitable path transmission.Forwarding request package with good conditionsi can reduce communication complexity, has reduced under the situation of time delay and has selected optimal path.It has not only inherited the advantage of traditional distributed QoS routing algorithm, and under large scale network and heavy load situation less time delay and the higher bandwidth admittance rate of being connected can be arranged.Can from the routed path that satisfies route conditions, select the routed path that satisfies various P2P business needs according to this routing policy thus.Each route platform is selected the QoS routed path that satisfies the professional correspondence of every kind of P2P all paths in territory separately respectively, then, from selected satisfy to select the professional corresponding QoS routed path of every kind of P2P satisfy the QoS routed path of specifying corresponding P2P business.Each route platform is selected the QoS routed path that satisfies the professional correspondence of every kind of P2P the path of all between the territory respectively, then, from selected satisfy to select the professional corresponding QoS routed path of every kind of P2P satisfy the QoS routed path of specifying corresponding P2P business, reach shunting with this to miscellaneous service, reduce the congested of network, increase the utilance and the credibility of network.
Claims (1)
1. the QoS method for routing based on the P2P traffic identification is characterized in that, comprises the steps:
Steps A when the business data packet grouping arrives route platform, is at first shunted business, adopts feature process method of identification that the data flow of entry port is carried out the P2P traffic identification;
A-1 when the type of service that is identified belongs to general business, selects for use conventional routing policy to carry out data forwarding;
A-2 when the type of service that is identified belongs to P2P when professional, adopts step B the P2P business to be carried out P2P traffic identification and flow control to step D;
Step B to the data flow that belongs to the P2P business that steps A identifies, according to the process feature of each P2P business, sets up P2P service feature process class library;
Step C according to the requirement of each P2P business to network parameter, to each P2P traffic set corresponding D SCP value, classifies to each P2P business according to the DSCP value of setting then;
Step D adopts P2P service traffics Control Software, and the speed that the P2P business is entered the datagram of route platform is controlled; Described P2P service traffics Control Software adopts flow control software FluxEye;
Step e adopts the DSCP grader that the DSCP value of each P2P business is discerned, and then the professional branch of each P2P is gone into corresponding routed port waiting list;
Step F, route platform is carried out corresponding routing update according to distributed QoS routing algorithm, described distributed QoS routing algorithm all is provided with corresponding update time to each waiting list, the all corresponding corresponding routing table structure of each waiting list, described routing table structure adopts multirouting list structure in the tactful route;
Step G is transmitted by weighting scheduler schedules to the port in the corresponding routing table for the P2P business in each waiting list;
Step H adopts meter that the P2P business datum newspaper that step G transmits is carried out the flow rate real-time statistics, and in meter setting data flow rate threshold value, this data traffic rate-valve value is set according to the actual conditions of route platform processor; When the data traffic speed of real-time statistics during greater than preset threshold, the through-rate adjuster is regulated the P2P business that enters route platform, and restriction enters the service traffics of route platform;
Step I after the data flow of P2P business is transmitted successfully, returns steps A.
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| WO2014026336A1 (en) * | 2012-08-15 | 2014-02-20 | 华为技术有限公司 | Dscp marking method, system, and policy entity |
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| CN109039897A (en) * | 2018-07-20 | 2018-12-18 | 南京邮电大学 | A kind of software definition backhaul network method for routing based on service-aware |
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Application publication date: 20110202 |