CN104079651A - Broadcasting and television multi-export intelligent scheduling system and method based on SDN frame - Google Patents

Broadcasting and television multi-export intelligent scheduling system and method based on SDN frame Download PDF

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CN104079651A
CN104079651A CN201410305641.8A CN201410305641A CN104079651A CN 104079651 A CN104079651 A CN 104079651A CN 201410305641 A CN201410305641 A CN 201410305641A CN 104079651 A CN104079651 A CN 104079651A
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outlet
utilization rate
system
bandwidth
user
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CN201410305641.8A
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CN104079651B (en
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占亿民
张在琛
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东南大学
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Abstract

The invention discloses a broadcasting and television multi-export intelligent scheduling system and method based on an SDN frame, and belongs to the technical field of broadband networks and broadcasting and televisions. The system comprises an intelligent cache module, an intelligent analysis module, an intelligent export monitoring module and an intelligent export optimization module. A DNS, a DPI, exports, a cache, a certification system and other existing broadcasting and television supporting system resources are innovatively and comprehensively utilized, all supporting systems do not provide the fool type single function service any more, the supporting systems can achieve higher efficiency, data are fully utilized, and therefore main exports and optimization exports of an existing network are successfully and intelligently scheduled, hot spot content is successfully and intelligently cached, intelligent router optimization and intelligent address analysis are successfully achieved, the system utilization rate of the exports, the cache and the like is greatly improved, and broadband user experience is improved.

Description

Broadcasting and TV multi-outlet intelligent dispatching patcher and method based on SDN framework

Technical field

The present invention relates to a kind of broadcasting and TV multi-outlet intelligent dispatching patcher and dispatching method based on SDN framework, belong to broadband network and broadcasting television technology field.

Background technology

The demand for development of complying with " broadband China ", develops high broadband services and becomes the common issue that Ge great operator faces.Be limited to Export resource, each large radio and TV operator generally runs into the impact of Export resource scarcity in development high bandwidth business, main solution has introduces many egress lines, introducing CDN, introducing buffer memory, really solved subproblem, but ubiquity is not enough in the scheduling of these resources.How the outlet bandwidth resource of performance broadcasting and TV mediocrity is rationally made full use of and effectively promote broadband user and experience the subject matter that has become radio and TV operator's thinking.

Through carefully analyzing, affect the situation that user experiences and mainly contain following several: (1) evening peak period, owing to exporting, congestedly occur that websites response even cannot normally be used phenomenon slowly, customer complaint amount is larger; (2), because the outbound ownership place of buying is different, the ownership place while causing user to surf the Net, in local and change often, does not cause customer complaint; (3) because different outlets are used in various zones, section is experienced and is differed greatly; (4) VIP user experiences and to compare domestic consumer and do not have a distinct increment; (5) traditional routing policy is realized outlet optimization, and route entry is numerous and diverse, cannot realize controlled; (6) hit rates such as the CDN introducing, buffer memory are not high, and Intranet flow is lower; (7) the internet, applications address with ownership place shows that variation is frequent; (8) the accurate popular content of consumer positioning, and content localization in time; (9) each support system is more isolated, and function singleness lacks globalize view service theory; (10) route optimization and outlet characteristic are not mated, and service optimization effect is without obvious lifting; (11) dns resolution address does not conform to outlet ownership place, and user experiences poor.

In addition, along with the Internet explosion type increase, except scale and development far away super before all data networks that once occurred, it is dazzled that the speed-to-market of business also makes us very much, the thing followed is exactly loaded down with trivial details maintenance optimization problem.People catch sight of, and legacy network optimization and maintenance scheme, owing to existing a lot of defects, cannot meet current needs.Due to up to the present, most operations and business support system be all based on stand-alone entity, function " fool is single ", and only for the safeguard of single support system entity, quality assurance and monitoring substantially in abandoning state.Its consequence is exactly, and business is communicated with, and without the assurance of experiencing, thereby cause quality of service impaired.Due to isolating of each support system business, itself be the system of an independent sealing, most support system is all by order line or webmaster, optimized by keeper's manual configuration.When running into global system dynamic optimization business, very poor efficiency just seems.Even cannot implement.Support system cannot meet the needs of business, the experience accumulation that need to last for several years, and detailed policy development, and loaded down with trivial details manual operation, could meet the demand of new business.

For many years, people have found out some ways of dealing with problems really, but are usually to have solved a problem, and another one problem comes one after another again.Because everybody has ignored these problems is that the base attribute of the traditional support system network architecture determines, this supporting business that the independent support system of take is representative is without knowing that global network, global network are also without the Decoupling Mode of knowing supporting business, having brought up isolated support entity and the natural of global network isolates, from the network architecture, do not start with, problem is difficult to obtain the most basic solution.

Summary of the invention

For addressing the above problem, the invention discloses a kind of broadcasting and TV multi-outlet intelligent dispatching patcher and dispatching method based on SDN framework, innovatively DNS, DPI, outlet, buffer memory, the comprehensive utilization of resources of the existing broadcasting and TV support system such as Verification System is got up, making each support system is no longer the service of " foolproof " simple function, the data that each support system is provided are integrated, are processed and analyzed, and have possessed global view function.

In order to achieve the above object, the invention provides following technical scheme:

A kind of broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework, be used for the existing DNS system of broadcasting and TV, DPI system, outlet, caching system, Verification System, network management system, outlet flow control system is connected and carry out obtaining and transmitting of data between these systems, wherein DNS system is used for resolving user's domain name, DPI system is used for obtaining popular business ranking data, caching system is for localized by internet content, whether the identification authentication before Verification System is surfed the Net for user is legal broadband user, network management system is used for obtaining and respectively exports details, outlet flow control system is for analyzing outlet data flow various service applications agreement and user's bandwidth usage, and the outlet bandwidth of controlling each quasi-protocol and user is used, also comprise intelligent buffer module, intelligently parsing module, module is optimized in intelligence outlet monitoring module and intelligence outlet, described intelligent buffer module is connected with caching system with DPI system, described intelligently parsing module is connected with DNS system and can exports by associated each, it is also associated with each outlet that module is optimized in simultaneously described intelligence outlet, and described intelligence outlet monitoring module respectively with network management system, outlet flow control system, Verification System is connected,

Wherein, described intelligent buffer module is for obtaining the whole network broadband user's popular business rank according to the popular business ranking data of DPI system, by rank forward and in caching system non-existent non-real time service download and feed back to caching system and carry out content localization; And for real-time service, intelligent buffer module exports routing optimality for the forward Internet service of these real-time service ranks; The storage utilization rate of Real-Time Monitoring caching system, deletes the business after clicking rate row in caching system according to storage utilization rate simultaneously; And regularly add up user's hit rate of each business in caching system, according to user's hit rate information that gives a warning;

Described intelligently parsing module is for regularly carrying out matching check to the optimization address entry in the domain name addresses of DNS system buffer memory and route optimization table, guarantee that address in route optimization table is all in DNS system in the domain name addresses of buffer memory, if matching check is inconsistent, according to the parsing domain name addresses of DNS feedback, service optimization to optimization corresponding to the outlet operator consistent with the ownership place of address is exported; Described intelligently parsing module is also carried out ownership place monitoring to other domain name addresses beyond route optimization, if when the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses is optimized to the trunk operator outlet consistent with domain name addresses; For parsing, change business frequently, the DNS by these business forward to the affiliated operator of trunk outlet; For parsing, be always the affiliated operator address of non-trunk outlet, address is optimized to the affiliated operator's outlet of non-trunk outlet; Described intelligently parsing module will be stamped Tos label with the internet, applications of ownership place simultaneously, and when outlet is passed through in these application, the optimizing application that egress router is stamped Tos label by these is to local breakout;

Intelligence outlet monitoring module is for by the service condition of each trunk outlet of network management system Real-Time Monitoring, and the height that can export utilization rate according to trunk carries out meticulous control and process, and comprises outlet flow control unit;

Described outlet flow control unit is used for setting the first utilization rate and controls threshold value, and according to network management system, obtain the utilization rate of each trunk outlet, when outlet utilization rate surpasses the first utilization rate control threshold value, according to corresponding outlet Flow Control strategy, outlet flow control system is carried out to control of export;

Described intelligence outlet is optimized module for the outlet network delay of business, packet loss index are monitored, and according to the service supporting capacity of each outlet, the best outlet of selectivity is as the optimization outlet of business.

Further: described intelligence outlet monitoring module also comprises customer group scheduling unit, described customer group scheduling unit is used for setting the second utilization rate and controls threshold value, and obtain the utilization rate of each trunk outlet and the outlet bandwidth that each customer group takies according to network management system, when having outlet utilization rate to surpass the second utilization rate control threshold value, the outlet bandwidth taking according to each customer group switches to by the group of certain customers in this busy outlet the relatively idle outlet that utilization rate is lower; Described customer group scheduling unit is for being dispatched to by high bandwidth user group the trunk outlet that quality is more good peak period user simultaneously.

Further: described intelligence outlet monitoring module also comprises user bandwidth control unit, described user bandwidth control unit obtains the utilization rate of each trunk outlet according to network management system, according to the height of outlet utilization rate, user's access bandwidth is adjusted and controlled, and send bandwidth adjustment instruction to Verification System.

Further: described intelligently parsing module can also regularly be excavated the variation of address in the Internet, delete the route of cancelling in route optimization table.

Preferred: described outlet Flow Control strategy is divided into guarantee and controls two parts, for the agreement that will ensure, does not do any restriction, ensures the unobstructed of these business and agreement; The agreement of controlling for needs is divided into a plurality of priority levels according to significance level, and according to rank height, limits successively the flow of each rank subordinate agreement.

Preferred: the support method in described outlet Flow Control strategy: guarantee is subdivided into the guarantee strategy of m level, m is more than or equal to 1; When outlet utilization rate is during lower than idle threshold value, for all agreements that will ensure, do not carry out any limit bandwidth, when outlet utilization rate is during higher than busy threshold value, according to assurance level from bottom to top successively to the guarantee traffic set bandwidth upper limits at different levels.

Preferred: the control method in described outlet Flow Control strategy comprises: control hierarchy can be subdivided into the control strategy of n level, n is more than or equal to 1; When outlet appearance is congested, first carry out one-level control strategy, for the agreement that belongs to one-level control, on the basis of original limit bandwidth, by reducing maximum bandwidth value, limit its flow; When adopting n level control strategy flow still to can not get effectively controlling, carry out (n+1) level control strategy, described (n+1) level control strategy adopts the method restriction of one-level control strategy to belong to the flow of the agreement of (n+1) secondary control, until export utilization rate, no longer increases; If flow still can not get limited control after having implemented all control strategies, outlet is carried out to dilatation; When outlet is congested, by segmentation priority, do not recall to successively from the bottom up former conditional numerical value.

Preferred: in the control method in described outlet Flow Control strategy, with being set with segmentation priority level in one-level control protocol, for each agreement according to segmentation priority level sequential control flow.

Preferred: the method that described user bandwidth control unit is adjusted and controlled user's access bandwidth is: when outlet bandwidth utilization rate is on the low side, the limiting bandwidth of setting each user is 2 times of customization bandwidth; When outlet utilization rate is medium, setting user access bandwidth is restricted to 1.5 times of customization bandwidth; When Export resource utilization rate is too high, set each user bandwidth and be personal customization bandwidth 1.2 times.

The present invention also provides a kind of broadcasting and TV multi-outlet intelligent dispatching method based on SDN framework,

By intelligent buffer module, according to the popular business ranking data of DPI system, obtain the whole network broadband user's popular business rank, by rank forward and in caching system non-existent non-real time service download and feed back to caching system and carry out content localization; And for real-time service, intelligent buffer module exports routing optimality for the forward Internet service of these real-time service ranks; The storage utilization rate of Real-Time Monitoring caching system, deletes the business after clicking rate row in caching system according to storage utilization rate simultaneously; And regularly add up user's hit rate of each business in caching system, according to user's hit rate information that gives a warning;

By intelligently parsing module, regularly the optimization address entry in the domain name addresses of buffer memory in DNS system and route optimization table is carried out to matching check, guarantee that address in route optimization table is all in DNS system in the domain name addresses of buffer memory, if matching check is inconsistent, according to the parsing domain name addresses of DNS feedback, service optimization to optimization corresponding to the outlet operator consistent with the ownership place of address is exported; Described intelligently parsing module is also carried out ownership place monitoring to other domain name addresses beyond route optimization, if when the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses is optimized to the trunk operator outlet consistent with domain name addresses; For parsing, change business frequently, the DNS by these business forward to the affiliated operator of trunk outlet; For parsing, be always the affiliated operator address of non-trunk outlet, address is optimized to the affiliated operator's outlet of non-trunk outlet; Described intelligently parsing module will be stamped Tos label with the internet, applications of ownership place simultaneously, and when outlet is passed through in these application, the optimizing application that egress router is stamped Tos label by these is to local breakout;

By intelligence, export the service condition that monitoring module is controlled each trunk outlet of network management system Real-Time Monitoring, and the height that can export utilization rate according to trunk carries out meticulous control and processes;

By outlet flow control unit, set the first utilization rate and control threshold value, and according to network management system, obtain the utilization rate of each trunk outlet, when outlet utilization rate surpasses the first utilization rate control threshold value, according to corresponding outlet Flow Control strategy, outlet flow control system is carried out to control of export;

By intelligence, exported and optimized module the outlet network delay of business, packet loss index are monitored, according to the service supporting capacity of each outlet, the best outlet of selectivity is as the optimization outlet of business.

Compared with prior art, the broadcasting and TV multi-outlet intelligent dispatching patcher tool that the present invention is based on SDN framework has the following advantages and beneficial effect:

The intelligent dispatching system of controlling by the overall situation, each support system has been given play to higher usefulness, data are fully utilized, thereby successfully realized the outlet of existing network trunk and optimized the intelligent scheduling exporting, the intelligent buffer of Hot Contents, the intelligent optimization of route, the intelligently parsing of address, greatly promote the system availabilities such as outlet, buffer memory, promoted broadband user's experience.

Accompanying drawing explanation

Fig. 1 is the structural representation of the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework;

Fig. 2 is service traffics seniority among brothers and sisters table;

Fig. 3 is control strategy flow chart of steps;

Fig. 4 is user bandwidth control flow chart.

Embodiment

Below with reference to specific embodiment, technical scheme provided by the invention is elaborated, should understands following embodiment and only for the present invention is described, is not used in and limits the scope of the invention.

As shown in Figure 1, the invention provides a kind of broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework, can obtain the hot topic application rank that can provide in each support system of existing broadcasting and TV, Exit Road by data such as, every business, these data are monitored, and after further computing, realized the outlet of existing network trunk and optimized the intelligent scheduling exporting, the intelligent buffer of Hot Contents, the intelligent optimization of route, the intelligently parsing of address, greatly promote the system availabilities such as outlet, buffer memory, promoted broadband user's experience.At present, native system can obtain with the existing DNS of broadcasting and TV, DPI, outlet, buffer memory, authenticate that these support systems are connected and between these systems, carry out obtaining and transmitting of data.At this, above-mentioned support system is carried out to brief description.DNS system: for resolving user's domain name; DPI system is depth data packet analysis system, can obtain popular business ranking data; Outlet: interconnect because broadcasting and TV are unrealized, therefore, need purchase the resource that interconnects of other operator; Caching system: by internet content localization (downloading to this locality), when user accesses internet content, as local cache has this content, will obtain from local cache.Verification System: for the identification authentication before user's online, whether be legal broadband user.Network management system: can obtain and respectively export details (bandwidth occupancy numerical value, remaining bandwidth, utilization rate, outlet utilized bandwidth of each user and customer group etc.).Outlet flow control system: can analyze the bandwidth usage (can for a certain user or a certain IP) of various service applications agreement and user in outlet data flow, and the outlet bandwidth of controlling each quasi-protocol and user is used.The framework of above-mentioned existing support system and practical function, for known in the industry, are not described in detail in the present invention.

Broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework, comprise that intelligent buffer module, intelligently parsing module, intelligence outlet monitoring module and intelligence outlet optimize module, these modules with the existing DNS of broadcasting and TV, DPI, outlet, buffer memory, authenticate that these support systems are connected and between these systems, carry out obtaining and transmitting of data.In this example, intelligent buffer module is connected with caching system with DPI system, intelligently parsing module is connected with DNS system and can exports by associated each, intelligence outlet monitoring module can be monitored Export State the associated outlet of energy flow control system, Verification System and bras equipment by network management system, and intelligence outlet optimization module is associated with each outlet.

Wherein, intelligent buffer module, obtains the whole network broadband user's popular business (comprising website, video, application) rank for intelligence, the downloads such as the forward video of rank, application is fed back to caching system and carry out content localization.At present, the DPI system in Broadcast and TV system can provide the rank of service traffics as shown in Figure 2 for intelligent dispatching system, and DPI system is clicked statistics according to the whole network business, obtains the forward business of rank, the business packet purse rope station here, application, client etc.In actual applications, if other the existing systems except DPI system can provide service traffics rank, intelligent buffer module also can for example, obtain needed precedence data from these systems (exporting flow control system).Intelligent dispatching system gets after popular seniority among brothers and sisters, and non-existent popular entry in caching system (being mainly the non-real time service that larger flow was fixed, occupied to the data such as video) is downloaded and be sent in caching system to buffer memory in addition from the Internet.Specifically when realizing, intelligent buffer module can be obtained cache list from caching system, and compares with hot topic seniority among brothers and sisters table, thus by non-existent popular entry buffer memory in caching system to caching system, thereby can reach, promote Intranet flow, reach the object of saving outlet bandwidth resource.And be directed to Data Update real-time service rapidly, as share certificate software, qq application etc., intelligent buffer module can also export routing optimality for the forward Internet service of these ranks, here the outlet routing optimality pointer of mentioning is applied some, is optimized to the outlet that quality is more good.What be worth prompting is, intelligent buffer module might not all be carried out buffer memory or routing optimality to all business in the popular business list obtaining in DPI system, due to resource limitation, may choose the forward partial service of rank in popular business list and carry out buffer memory or routing optimality, the number of services of optimization can be set as required.

The storage utilization rate that intelligent buffer module can also Real-Time Monitoring caching system provides is (for the storage occupancy of the server of memory buffers content, for example server overall space is 100G, storage has taken 80G, storing utilization rate is 80%), for example, when utilization rate surpasses certain threshold value (70%), dispatching patcher can be deleted the business after clicking rate row and (for example delete rank from 30 later business from caching system, concrete business of deleting what rank can be set according to actual environment), to save storage resources.In addition, intelligent dispatching system regularly (for example one week, regular intervals of time can arrange as required) user's hit rate of each business in statistics caching system (user's hit rate refer to probability that business that user clicks access is present in caching system for example business A by program request 100 times altogether, wherein there are 70 these business in buffer memory, hit rate is 70%), application for hit rate lower (for example, lower than 70%), the dispatching patcher information that can give a warning in time, to webmaster personnel, report to the police, to optimize in time.

Described intelligently parsing module is used for resolving station address, guarantees parse addresses and exports the consistent of both ownership place.

Specifically, intelligently parsing module is checked route optimization: regularly (for example one week, regular intervals of time can arrange as required) the optimization address entry in the domain name addresses of buffer memory in DNS system and route optimization table is carried out to matching check, guarantee that address in route optimization table is all in DNS system in the domain name addresses of buffer memory, if the inconsistent words of matching check, according to the parsing domain name addresses of DNS feedback, service optimization to optimization corresponding to the outlet operator consistent with the ownership place of address is exported, thereby the ownership place of guaranteeing to optimize address is consistent with outlet operator.It should be noted that, CHINA RFTCOM Co Ltd flow take trunk outlet as main, trunk outlet is exactly the sustainer of CHINA RFTCOM Co Ltd rate of discharge, and some targeted websites, game and application need to be optimized, make it by other outlets, make access become smooth, thereby alleviate the pressure of trunk outlet, improve user and experience, beyond above-mentioned trunk outlet and for the current outlet of optimization business, be called as and optimize outlet.The outlet that CHINA RFTCOM Co Ltd trunk outlet at present provides for the A of operator.From switch, can derive the routing configuration of each business, thereby obtain the route optimization table through optimization business.For this route optimization table, intelligently parsing module is the robustness of inspection optimization route regularly, excavate in time the variation (can obtain up-to-date address by the domain name addresses of buffer memory in DNS system) of address in the Internet, delete the route of cancelling, safeguard a short and sweet route optimization table.

Intelligently parsing module is also checked other routes: other domain name addresses beyond route optimization is carried out to ownership place monitoring, when if the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses are optimized to the trunk operator outlet consistent with domain name addresses, address after resolving with assurance is all address under trunk outlet operator, in conjunction with current Broadcast and TV system, need to guarantee that the address after parsing is all the A of the operator address under trunk outlet.For resolving variation, frequently (each address of resolving is different, and address home-operator is different, the A of Shi Erwei operator address for example, Shi Erwei operator B location) business, the DNS by these business forward to the A of operator under trunk outlet; Described forward refers to a kind of domain name pass-through mode of DNS; For parsing, be always the address of the B of operator, address is optimized to the B of operator outlet.Thereby can accelerate access speed, promote user and experience.

In addition, because section port resource is under the jurisdiction of other provinces operator, when this type of outlet broadband subscribers access of serving is during with the internet, applications (as QQ debarkation point, the online business hall of operator) of ownership place, address is usually shown as strange land, and this brings poor experience to user.Intelligently parsing module by these internet, applications with ownership place stamp Tos label, these application are by when outlet, the optimizing application that egress router is stamped Tos label by these, to local breakout, has successfully solved ownership place and has shown the frequent problem of variation.

Described intelligence outlet monitoring module can be by the service condition (bandwidth occupancy numerical value, remaining bandwidth, utilization rate etc.) of each trunk outlet of network management system Real-Time Monitoring, and the height that can export utilization rate according to trunk carries out meticulous control and process, guarantee the light running of outlet.

By a large amount of data analyses with facts have proved, when outlet utilization rate is higher than 90% time, data packet transmission postpones and packet loss will increase, have a strong impact on user's experience, therefore in outlet utilization rate higher than 80% time, intelligence outlet monitoring module will carry out outlet bandwidth restriction to outlet flow control system according to set outlet Flow Control strategy, to guarantee respectively to export utilization rate lower than 90%.

Intelligence outlet monitoring module comprises outlet flow control unit, and described outlet flow control unit is carried out control of export according to corresponding outlet Flow Control strategy to outlet flow control system.This outlet flow control unit is different mechanism from outlet flow control system, described outlet flow control unit is used for setting the first utilization rate and controls threshold value, and according to network management system, obtain the utilization rate of each trunk outlet, when outlet utilization rate surpasses the first utilization rate control threshold value, according to corresponding outlet Flow Control strategy, outlet flow control system is carried out to control of export, and export flow control system for analyzing outlet data flow various service applications agreement and user's bandwidth usage, and control each quasi-protocol and user's outlet bandwidth use.Outlet Flow Control strategy is divided into guarantee and controls two parts, and for the agreement that will ensure, whole day is not done any restriction, ensures the unobstructed of these business and agreement; And for the agreement that will control, need to it, carry out flow restriction according to tactful priority.The agreement of need controlling is divided into a plurality of priority levels according to significance level, and one-level is controlled priority and controlled higher than secondary, only has when one-level, to control the agreement that is restricted to the limit and exports in just secondary being controlled when still congested and limit.For example, control hierarchy can be subdivided into one-level and control (P2P:BT, a sudden peal of thunder, electric donkey, qvod etc.), secondary control (HTTP-download), three grades of controls, every one-level control strategy is all to there being related protocol.Specifically, when (utilization rate higher than 80% time) appears when congested in outlet, adopt method as shown in Figure 3 to control agreement and business: first to carry out one-level control strategy, for the agreement that belongs to one-level control, on the basis of original limit bandwidth, by reducing maximum bandwidth value, limit its flow, because the agreement that belongs to same one-level control is more than one, in same first level protocol, also can set segmentation priority, strategy priority is according to coupling execution from top to bottom, uppermost priority is the highest, such as priority is BT from top to bottom, a sudden peal of thunder, electricity donkey, P2P, preferentially limiting BT downloads, by 100M furnishing 80M, next is a sudden peal of thunder, the P2P agreements such as electricity donkey, do not export when congested and by segmentation priority, recall to successively from the bottom up former conditional numerical value, when flow still can not get effectively controlling (utilization rate is still higher than 80%), then take secondary control strategy, i.e. restriction belongs to the flow of the agreement of secondary control, when flow still can not get effectively controlling, take again three grades of control strategies, i.e. restriction belongs to the flow of the agreement of three grades of controls ... until outlet utilization rate no longer increases, if flow still can not get limited control after having implemented all control strategies, can carry out dilatation to outlet.Same, when outlet is congested, according to three grades, the order of secondary, one-level, do not recall to successively the protocols having of former conditional institute.Further, ensure and also can be subdivided into one-level guarantee (instant messaging QQ for example, MSN etc., game, stock exchange transaction), secondary ensures (HTTPS, Http-browsing business etc.), three grades of guarantee (related protocol RTP of Online Video website, RTCP, RTSP etc.) the business ensureing for one-level, decontrol limit bandwidth (being bandwidth no maximum) completely, for example, in outlet utilization rate during lower than idle threshold value (50%), for secondary guarantee business and three grades of guarantee business etc., also decontrol limit bandwidth, but for example, when outlet utilization rate surpasses busy threshold value (80%), can to the bandwidth of guarantee business at different levels, from relieving state to state of a control, (maximum bandwidth value be set) successively from bottom to top, specifically, for example, when outlet utilization rate surpasses the first busy threshold value (80%), the business setting bandwidth upper limit to three grades of guarantees, when outlet utilization rate surpasses the second busy threshold value (85%), the business setting bandwidth upper limit that secondary is ensured.Concrete utilization rate numerical value, can set as required, is not limited to above-mentioned 80% or 85%.In sum, for the business ensureing, when utilization rate is lower, we do not control completely to its bandwidth, and when utilization rate is too high, we ensure traffic limits bandwidth for some; For the business that will control, even when utilization rate is lower, still there is the bandwidth upper limit, and when utilization rate is higher, further limit the bandwidth of these business.

Further, described intelligence outlet monitoring module also comprises customer group scheduling unit, customer group scheduling unit can obtain the utilization rate of each trunk outlet and the outlet bandwidth that each customer group takies, when having outlet utilization rate to surpass 90%, automatically the group of certain customers in this busy outlet is switched to the relatively idle outlet that utilization rate is lower.Specifically, customer group scheduling unit can obtain the outlet bandwidth that each customer group (we will use the user group of same gateway to be called a customer group) consumes by network management system, when carrying out balance dispatching, customer group scheduling unit can be corresponding with customer group scale (outlet bandwidth that this customer group consumes) by the remaining outlet bandwidth size of relatively idle outlet, the relatively idle outlet utilization rate of bringing to avoid the too high customer group of bandwidth consumed to switch to relatively idle outlet is too high, causes outlet to distribute again uneven.For instance, as busy outlet outlet utilization rate surpasses 90%, wherein there is customer group A (occupied bandwidth 250M), customer group B (occupied bandwidth 300M), customer group C (occupied bandwidth 150M), the utilization rate of idle outlet is 70%, this outlet total bandwidth is 1000M, vacant bandwidth is 300M, if customer group A or customer group B are switched to idle outlet, can cause idle outlet utilization rate to surpass 90%, therefore intelligence outlet monitoring module can automatic computation-free outlet residue can utilized bandwidth (the current occupied bandwidth of the idle outlet busy threshold value 90%-of total bandwidth *), the scale in busy outlet chosen is less than or equal to the customer group scale that idle outlet can utilized bandwidth and is switched to idle outlet, after switching, the idle utilization rate exporting can be not too high in order.We can export monitoring module by intelligence and directly carry out the switching of customer group, also can utilize the system with customer group handoff functionality existing in Broadcast and TV system or module to carry out the switching of customer group, when utilizing existing system or module, intelligence outlet monitoring module can be sent in existed system or module the busy outlet that need to carry out customer group switching after calculating, idle outlet and the customer group data that can dispatch to realize the switching of customer group.By above-mentioned means, intelligence outlet monitoring module can equilibrium respectively export utilization rate, avoids section port utilization rate too high, and some outlet utilization rate phenomenon on the low side, effectively guarantee the abundant use of each outlet, solved the user experience difference of the whole network with business various zones.

In fact, the above-mentioned utilization rate numerical value 80% and 90% of mentioning is only to get according to the bandwidth usage of current broadcasting and TV and user experience data analysis, we also can control threshold value by the first utilization rate control threshold value and the second utilization rate and replace respectively above-mentioned numerical value, consider the impact of after the actual conditions of equipment and environment and upgrading in the future, user being experienced, the first utilization rate controls threshold value and the second utilization rate control threshold value can be adjusted according to actual needs, is not subject to the restriction of aforementioned concrete numerical value.

Further, customer group scheduling unit can also be dispatched to by high bandwidth user group (referring to the user that personal customization bandwidth is higher here) the trunk outlet that quality is more good user peak period (can or on ordinary days export according to historical experience data decimation the period that utilization rate is the highest according to current outlet utilization rate real-time judge peak period), trunk outlet has been carried out static classifying and grading in advance according to quality, intelligence outlet monitoring module can be promoted to high bandwidth user high one or more levels the trunk outlet of credit rating, to guarantee high bandwidth user's absolute good experience.The user that concrete selection reaches how many bandwidth dispatches and adjusts and can arrange according to actual needs.

Further, intelligence outlet monitoring module not only can be controlled, customer group is dispatched agreement when outlet utilization rate is too high, can also be according to the actual conditions of outlet utilization rate, for the unidirectional bandwidth of each IP of personal user, control, therefore intelligence outlet monitoring module also comprises user bandwidth control unit, this unit is heightened user's bandwidth when outlet utilization rate is lower, when outlet utilization rate is higher, user's bandwidth is turned down.As shown in Figure 4, when outlet bandwidth utilization rate (for example, lower than 50%) on the low side, the limiting bandwidth of setting each user is 2 times of customization bandwidth to concrete operating process, to reduce the peak-to-valley ratio of outlet utilization rate, improves the idle utilization rate of Export resource; When outlet utilization rate is when medium, (for example, higher than 50%, and lower than 80% time), sets user's access bandwidth and is restricted to 1.5 times of customization bandwidth; When Export resource utilization rate too high (higher than 80%), set each user bandwidth and be personal customization bandwidth 1.2 times, with the experience that guarantees that user is good.When setting user's limiting bandwidth, intelligence outlet monitoring module sends bandwidth and adjusts instruction to Verification System, Verification System issue again radius bandwidth attribute to bras equipment (BAS Broadband Access Server) to realize personalized restriction.

Module is optimized in intelligence outlet can record the pluses and minuses that intellectual analysis exports each outlet according to the history use of each outlet, thereby carries out the personalization scheduling of " the corresponding outlet of business ".The module outlet network delay to business is for a long time optimized in intelligence outlet, the indexs such as packet loss are monitored, as shown in table 1 below, X.X.X.X is certain content server address of youku website, while using different this server of outlet access, network delay is different with packet loss, intelligent dispatching system can selectivity better the outlet C of (ordinary priority is selected the minimum outlet of packet loss, the preferential outlet of selecting network delay minimum under packet loss same case) as the optimization outlet of this address.By above-mentioned means, the service supporting capacity of drawing out each outlet that module can global system is optimized in intelligence outlet, more reasonably optimize Internet service, as, optimize A outlet and be applicable to Sina's video, and optimize B outlet, be applicable to Tengxun's game etc., make each outlet respectively carry out its duty, give full play to the usefulness that each optimizes outlet.

Table 1

We are combined the existing support system of intelligent dispatching system and broadcasting and TV to try out, between trial run period, Intranet flow accounting (buffer memory, the Intranet flow that mirror image etc. provide accounts for the ratio of total flow) 37% is promoted to 45% from reaching the standard grade, and has greatly saved outlet bandwidth resource; According to investigations, user satisfaction is also promoted to 90% from original 45%.As can be seen here, intelligent dispatching system can effectively promote Intranet utilization rate, saves outlet bandwidth resource, thereby has improved the service quality of operator's data service, has promoted user's experience.

We know; the system configuration that realizes software function may be ever-changing; the most important thing is the concrete function that this system can realize; the module title providing in the present invention and unit title be only for a kind of example, as long as can realize the technical scheme of module/Elementary Function that the present invention mentions, should be considered as protection scope of the present invention.

The present invention has also described a kind of broadcasting and TV multi-outlet intelligent dispatching method, comprises the steps, can realize following function, it should be noted that in these following steps and there is no sequencing relation.

Obtain the whole network broadband user's popular business (comprising website, video, application) rank, non-existent popular entry in caching system (being mainly the non-real time service that larger flow was fixed, occupied to the data such as video) is downloaded and is sent in caching system to buffer memory in addition from the Internet, carry out content localization, promote Intranet flow, save outlet bandwidth resource.And be directed to Data Update real-time service rapidly, as share certificate software, qq application etc., intelligent buffer module can also export routing optimality for the forward Internet service of these ranks.

The storage utilization rate that Real-Time Monitoring caching system provides, when utilization rate is too high, the business in deletion caching system after clicking rate row is to save storage resources; And regularly add up user's hit rate of each business in caching system, for the lower application of hit rate, the dispatching patcher information that can give a warning in time, reports to the police to webmaster personnel, to optimize in time.

Automatic monitoring optimization outlet, regularly the optimization address entry in the domain name addresses of buffer memory in DNS system and route optimization table is carried out to matching check, if the inconsistent words of matching check, according to the parsing domain name addresses of DNS feedback by service optimization to optimization outlet corresponding to the outlet operator consistent with the ownership place of address, thereby the ownership place of guaranteeing to optimize address with export the consistent of operator.In addition, all right regularly robustness of inspection optimization route, the variation of excavating in time address in the Internet, deletes the route of cancelling, and safeguards a short and sweet route optimization table.

Other domain name addresses beyond route optimization is carried out to ownership place monitoring, when if the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses are optimized to the trunk operator consistent with domain name addresses outlet, be all that trunk exports address under operator with the address after guaranteeing to resolve.For parsing, change business frequently, the DNS by these business forward to the affiliated A of operator of trunk outlet; For parsing, be always the address of the B of operator, address is optimized to the B of operator outlet.Thereby can accelerate access speed, promote user and experience.

Internet, applications by these with ownership place is stamped Tos label, and when outlet is passed through in these application, the optimizing application that egress router is stamped Tos label by these, to local breakout, has successfully solved ownership place and shown the frequent problem of variation.

Automatically monitor the utilization rate situation of each trunk outlet, by outlet Flow Control strategy, control the rising of outlet utilization rate, by customer group, dispatch the balanced utilization rate that respectively exports, can also peak period high bandwidth user group be dispatched to the trunk outlet that quality is more good user, and can just control user's access bandwidth according to utilization rate, effectively reduce outlet packet loss and transmission delay, guarantee each trunk outlet rush hour in night section light running, and effectively promoted user's experience;

Described outlet Flow Control strategy comprises guarantee and controls two parts; For the agreement that will ensure, whole day is not done any restriction, ensures the unobstructed of these business and agreement; The agreement of controlling for needs is divided into a plurality of priority levels according to significance level, and according to rank height, limits successively the flow of each rank subordinate agreement, until flow is effectively controlled; In same first level protocol, also can set the priority level of refinement more and come according to certain sequencing, to control flow for each agreement, thereby make flow control more meticulous.

Outlet network delay to business for a long time, the indexs such as packet loss are monitored, and use and record the pluses and minuses that intellectual analysis exports each outlet, thereby the best outlet of selectivity is as the optimization outlet of business according to the history of each outlet.Can to popular business, carry out this optimization process by preferred pin.

The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned execution mode, also comprises the technical scheme being comprised of above technical characterictic combination in any.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (10)

1. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework, be used for the existing DNS system of broadcasting and TV, DPI system, outlet, caching system, Verification System, network management system, outlet flow control system is connected and carry out obtaining and transmitting of data between these systems, wherein DNS system is used for resolving user's domain name, DPI system is used for obtaining popular business ranking data, caching system is for localized by internet content, whether the identification authentication before Verification System is surfed the Net for user is legal broadband user, network management system is used for obtaining and respectively exports details, outlet flow control system is for analyzing outlet data flow various service applications agreement and user's bandwidth usage, and the outlet bandwidth of controlling each quasi-protocol and user is used, it is characterized in that: comprise intelligent buffer module, intelligently parsing module, module is optimized in intelligence outlet monitoring module and intelligence outlet, described intelligent buffer module is connected with caching system with DPI system, described intelligently parsing module is connected with DNS system and can exports by associated each, it is also associated with each outlet that module is optimized in simultaneously described intelligence outlet, and described intelligence outlet monitoring module respectively with network management system, outlet flow control system, Verification System is connected,
Wherein, described intelligent buffer module is for obtaining the whole network broadband user's popular business rank according to the popular business ranking data of DPI system, by rank forward and in caching system non-existent non-real time service download and feed back to caching system and carry out content localization; And for real-time service, intelligent buffer module exports routing optimality for the forward Internet service of these real-time service ranks; The storage utilization rate of Real-Time Monitoring caching system, deletes the business after clicking rate row in caching system according to storage utilization rate simultaneously; And regularly add up user's hit rate of each business in caching system, according to user's hit rate information that gives a warning;
Described intelligently parsing module is for regularly carrying out matching check to the optimization address entry in the domain name addresses of DNS system buffer memory and route optimization table, guarantee that address in route optimization table is all in DNS system in the domain name addresses of buffer memory, if matching check is inconsistent, according to the parsing domain name addresses of DNS feedback, service optimization to optimization corresponding to the outlet operator consistent with the ownership place of address is exported; Described intelligently parsing module is also carried out ownership place monitoring to other domain name addresses beyond route optimization, if when the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses is optimized to the trunk operator outlet consistent with domain name addresses; For parsing, change business frequently, the DNS by these business forward to the affiliated operator of trunk outlet; For parsing, be always the affiliated operator address of non-trunk outlet, address is optimized to the affiliated operator's outlet of non-trunk outlet; Described intelligently parsing module will be stamped Tos label with the internet, applications of ownership place simultaneously, and when outlet is passed through in these application, the optimizing application that egress router is stamped Tos label by these is to local breakout;
Intelligence outlet monitoring module is for by the service condition of each trunk outlet of network management system Real-Time Monitoring, and the height that can export utilization rate according to trunk carries out meticulous control and process, and comprises outlet flow control unit;
Described outlet flow control unit is used for setting the first utilization rate and controls threshold value, and according to network management system, obtain the utilization rate of each trunk outlet, when outlet utilization rate surpasses the first utilization rate control threshold value, according to corresponding outlet Flow Control strategy, outlet flow control system is carried out to control of export;
Described intelligence outlet is optimized module for the outlet network delay of business, packet loss index are monitored, and according to the service supporting capacity of each outlet, the best outlet of selectivity is as the optimization outlet of business.
2. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 1, it is characterized in that: described intelligence outlet monitoring module also comprises customer group scheduling unit, described customer group scheduling unit is used for setting the second utilization rate and controls threshold value, and obtain the utilization rate of each trunk outlet and the outlet bandwidth that each customer group takies according to network management system, when having outlet utilization rate to surpass the second utilization rate control threshold value, the outlet bandwidth taking according to each customer group switches to by the group of certain customers in this busy outlet the relatively idle outlet that utilization rate is lower; Described customer group scheduling unit is for being dispatched to by high bandwidth user group the trunk outlet that quality is more good peak period user simultaneously.
3. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 2, it is characterized in that: described intelligence outlet monitoring module also comprises user bandwidth control unit, described user bandwidth control unit obtains the utilization rate of each trunk outlet according to network management system, according to the height of outlet utilization rate, user's access bandwidth is adjusted and controlled, and send bandwidth adjustment instruction to Verification System.
4. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 3, is characterized in that: described intelligently parsing module can also regularly be excavated the variation of address in the Internet, deletes the route of cancelling in route optimization table.
5. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 4, it is characterized in that: described outlet Flow Control strategy is divided into guarantee and controls two parts, for the agreement that will ensure, do not do any restriction, ensure the unobstructed of these business and agreement; The agreement of controlling for needs is divided into a plurality of priority levels according to significance level, and according to rank height, limits successively the flow of each rank subordinate agreement.
6. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 5, is characterized in that: the support method in described outlet Flow Control strategy: guarantee is subdivided into the guarantee strategy of m level, m is more than or equal to 1; When outlet utilization rate is during lower than idle threshold value, for all agreements that will ensure, do not carry out any limit bandwidth, when outlet utilization rate is during higher than busy threshold value, according to assurance level from bottom to top successively to the guarantee traffic set bandwidth upper limits at different levels.
7. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 6, is characterized in that: the control method in described outlet Flow Control strategy comprises: control hierarchy can be subdivided into the control strategy of n level, n is more than or equal to 1; When outlet appearance is congested, first carry out one-level control strategy, for the agreement that belongs to one-level control, on the basis of original limit bandwidth, by reducing maximum bandwidth value, limit its flow; When adopting n level control strategy flow still to can not get effectively controlling, carry out (n+1) level control strategy, described (n+1) level control strategy adopts the method restriction of one-level control strategy to belong to the flow of the agreement of (n+1) secondary control, until export utilization rate, no longer increases; If flow still can not get limited control after having implemented all control strategies, outlet is carried out to dilatation; When outlet is congested, by segmentation priority, do not recall to successively from the bottom up former conditional numerical value.
8. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 7, it is characterized in that: in the control method in described outlet Flow Control strategy, with being set with segmentation priority level in one-level control protocol, for each agreement according to segmentation priority level sequential control flow.
9. the broadcasting and TV multi-outlet intelligent dispatching patcher based on SDN framework according to claim 8, it is characterized in that: the method that described user bandwidth control unit is adjusted and controlled user's access bandwidth is: when outlet bandwidth utilization rate is on the low side, the limiting bandwidth of setting each user is 2 times of customization bandwidth; When outlet utilization rate is medium, setting user access bandwidth is restricted to 1.5 times of customization bandwidth; When Export resource utilization rate is too high, set each user bandwidth and be personal customization bandwidth 1.2 times.
10. the broadcasting and TV multi-outlet intelligent dispatching method based on SDN framework, is characterized in that:
By intelligent buffer module, according to the popular business ranking data of DPI system, obtain the whole network broadband user's popular business rank, by rank forward and in caching system non-existent non-real time service download and feed back to caching system and carry out content localization; And for real-time service, intelligent buffer module exports routing optimality for the forward Internet service of these real-time service ranks; The storage utilization rate of Real-Time Monitoring caching system, deletes the business after clicking rate row in caching system according to storage utilization rate simultaneously; And regularly add up user's hit rate of each business in caching system, according to user's hit rate information that gives a warning;
By intelligently parsing module, regularly the optimization address entry in the domain name addresses of buffer memory in DNS system and route optimization table is carried out to matching check, guarantee that address in route optimization table is all in DNS system in the domain name addresses of buffer memory, if matching check is inconsistent, according to the parsing domain name addresses of DNS feedback, service optimization to optimization corresponding to the outlet operator consistent with the ownership place of address is exported; Described intelligently parsing module is also carried out ownership place monitoring to other domain name addresses beyond route optimization, if when the ownership place of these domain name addresses and current outlet is inconsistent, these domain name addresses is optimized to the trunk operator outlet consistent with domain name addresses; For parsing, change business frequently, the DNS by these business forward to the affiliated operator of trunk outlet; For parsing, be always the affiliated operator address of non-trunk outlet, address is optimized to the affiliated operator's outlet of non-trunk outlet; Described intelligently parsing module will be stamped Tos label with the internet, applications of ownership place simultaneously, and when outlet is passed through in these application, the optimizing application that egress router is stamped Tos label by these is to local breakout;
By intelligence, export the service condition that monitoring module is controlled each trunk outlet of network management system Real-Time Monitoring, and the height that can export utilization rate according to trunk carries out meticulous control and processes;
By outlet flow control unit, set the first utilization rate and control threshold value, and according to network management system, obtain the utilization rate of each trunk outlet, when outlet utilization rate surpasses the first utilization rate control threshold value, according to corresponding outlet Flow Control strategy, outlet flow control system is carried out to control of export;
By intelligence, exported and optimized module the outlet network delay of business, packet loss index are monitored, according to the service supporting capacity of each outlet, the best outlet of selectivity is as the optimization outlet of business.
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