CN105681413A - Method and device for cooperative processing of data between CDN (Content Delivery Network) and ISP (Internet Service Provider) - Google Patents
Method and device for cooperative processing of data between CDN (Content Delivery Network) and ISP (Internet Service Provider) Download PDFInfo
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- CN105681413A CN105681413A CN201610024272.4A CN201610024272A CN105681413A CN 105681413 A CN105681413 A CN 105681413A CN 201610024272 A CN201610024272 A CN 201610024272A CN 105681413 A CN105681413 A CN 105681413A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/101—Server selection for load balancing based on network conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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Abstract
Embodiments of the invention disclose a method and a device for cooperative processing of data between a CDN (Content Delivery Network) and an ISP (Internet Service Provider), the ISP knows a cache server, which is selected to provide the service for a client by the CDN network, and the interaction complexity is low and implementation is simple. In the technical scheme of the invention, the ISP knows the cache server, which is selected to provide the service for the client by the CDN network, so that the ISP can master the actual flow of the network in real time to provide a better cooperation basis for cooperative processing of the data between the CDN and the ISP, and furthermore, the ISP network utilizes the SDN technology to carry out real-time congestion processing and flexible routing according to the actual flow of the network, the network is more flexibly monitored and managed, and the customer experience is improved.
Description
Technical field
The present invention relates to mobile Internet field, particularly to a kind of content distributing network (CDN, ContentDeliveryNetwork) with the collaborative method processing data of ISP (ISP, InternetServiceProvider) and device.
Background technology
Network traffics based on video content quickly increase, and bring great challenge to existing network. Firstly for operator, quickly increasing of network traffics makes network become very congested, and the request answer speed of user is slack-off, and in order to improve network condition, operator can only constantly extended network bandwidth. But, along with the decline of the reduction of voice and short message service amount and flow and campus network, the network expansion of operator is to oneself bringing very considerable income.
Network congestion and user's request answer speed are slow, also bring huge pressure to content supplier. According to statistics, Google accelerating website access often slow 400ms can result in user search request and declines 0.59%, if Yahoo website has 400ms delay can cause flow reduction 5-9%. The income that largely directly affects content supplier is experienced in accessing of Web content.
In order to tackle the challenge that current network flow quickly increases and network congestion brings, it is necessary to constantly improve optimization network from the angle improving content distribution efficiency. CDN is a kind of technology improving content distribution efficiency of current main flow. Its basic ideas are to avoid likely affecting on the Internet bottleneck and the link of data transmission bauds and stability as far as possible, make that content transmits faster, more stable. Constituting one layer of intelligent virtual network on existing Internet basic by placing caching server everywhere at network, CDN can in real time according to network traffics and the connection of each node, load state and the request of user be re-directed on the nearest service node of user to the integrated information such as distance and response time of user. Its objective is to make user can obtain required content nearby, solve the situation that Internet network is crowded, improve user and access the response speed of website.
Although CDN achieves immense success in technology and industry, but still there is many problems and challenge.First, along with the quick growth of internet traffic particularly video flow, the content of CDN is stored, route and dispatches it is proposed new requirement. Second, owing to the network state information of the server that ISP provides is lacked enough understandings by CDN, therefore CDN there is also optimization space in the distribution of content and the distribution of route. 3rd, along with the development of mobile Internet, LTE (4GLongTermEvolution, Long Term Evolution), cloud computing and big data is ripe, traditional CDN framework is also required to improve.
Therefore, how the network of CDN and the ISP of the bottom server provided being carried out collaborative process is the previous problem merited attention of order, by the topology of sensing network, link loading information, optimizes the transmission path of content distribution, thus reducing the time delay of request response, improve content distribution capability.
In order to realize the collaborative of CDN and ISP, prior art have employed following scheme:
Prior art one, is CaTE (traffic engineering of perception of content) scheme, by using the ISP content server recommended, optimizes the selection of CDN caching server, thus shortening the time of end-user access content. CaTE needs to rely on the close cooperation of CDN and ISP (minute level even second level) at short notice, and in order to realize this target, ISP must collect and process the network information. Meanwhile, the CDN caching server of candidate must keep communicating with ISP, and it also requires the CDN caching server of these candidates is carried out ranking. CaTE system is arranged in ISP, and with the selector communication interaction in CDN. The main task of CaTE is: (1) maintains the network state information figure of a up-to-date ISP place network and attribute thereof; (2) produce based on the preferential ranking in path between terminal use and candidate server; (3) communicate with CDN selector, optimize terminal use's distribution to content server.
CaTE framework is made up of three parts, communication interface part between network monitor part, query processing part, ISP and CDN.
(1) network monitor part
The information of network monitor portion collection ISP place network of network topological sum network state, network monitor part includes topology information module, connectivity information module, three modules of network mapping data library module. Wherein, topology information module is mainly used in collecting the details about network topology, as routeing and link, and the utilization rate of link, routing overhead and change in topology etc.; Connectivity information module is used primarily for routing iinformation calculated flow rate, with selecting paths; Network mapping data library module is mainly used in storing the information collected by topology information module and connectivity information module, and sets up network state information figure.
(2) query processing part
Query processing part, for receiving a description from the content requests of CDN, utilizes the network state information figure that network mapping data library module is set up, the CDN caching server of candidate is carried out ranking, it is thus achieved that available CDN caching server ranked list; CDN is recommended in described list.
(3) communication interface part
Communicate with query processing part and outside or inside for the network monitor part in CaTE framework.
In whole communication process, although the caching server in CDN has been sorted and has recommended by the query processing part in the CaTE system of ISP, but the final caching server that selects goes the right performing user's request still in CDN, ISP does not know the CDN CDN caching server providing service for client finally selected, and result also in ISP just because of this reason the control of whole network traffics is very weak.
Prior art two, it is a kind of based on SDN (SoftwareDefinedNetwork, software defined network) the cooperative approach of CDN and ISP, the program follows three below principle: one, mutually hides the relevant information of CDN and ISP both sides, encourages each side to carry out significantly more efficient collaborative operation; Two, due to integrated traffic management, it is desirable within the extremely short time, flow detected and manage; Three, it is determined as certain client by CDN and the caching server of service is provided.
Fig. 1 illustrates the designed holder composition of this system and the particular flow sheet of the program:
(1) client is to content supplier's request content, and the URL of request content is resolved by dns server, is redirected to RC (redirection center).
(2) RC terminates the TCP connection of client, and the relevant information of this TCP HTTP connected is informed to CDN, CDN be determined as the CDN caching server of user's service.
(3) the TCP connection interrupted is migrated, migrate to selected CDN caching server from RC. In order to ensure seamless migration, RC can access OpenFlow (standard agreement between controller and the switch) network of side to user and issue corresponding stream table to redirect data stream to the CDN caching server specified, it is ensured that the migration of tcp data stream.
(4) last, CDN the caching server specified and the client initiating request interact, the content requested to process this client.
Owing to carry out TCP migration in this programme, and the transition process of TCP needs to collect all of information relevant to connection status, which results in the complexity of system high.
Summary of the invention
The embodiment of the invention discloses a kind of CDN and ISP and work in coordination with the method and device that process data, ISP both can know the caching server providing service for client that CDN selects, it is also possible to reduces system complexity. Mutual by the collaborative processing module of perception and each interface, it is achieved ISP and CDN's is collaborative, reduces system design complexity.
In order to achieve the above object, the embodiment of the invention discloses a kind of CDN and ISP and work in coordination with the method processing data, network information database, perception collaborative processing module, SDN controller is comprised in the network of described ISP place, described CDN includes caching server and load-balanced server, described user side includes client, and described method includes:
The inquiry of the domain name that load-balanced server in CDN receives from client is asked, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;
The collaborative processing module of perception in ISP network sends, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up, the IP address list after sequence is sent to the load-balanced server in CDN;
Load-balanced server in CDN is according to the IP address list after sequence, and the current state of caching server in own net, determine the final caching server that service is provided for client, the IP address of determined caching server is fed back to client;
The described caching server for client offer service receives after the service request of client, and the essential information involved by described business is sent to the collaborative processing module of the perception in ISP; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client;
The collaborative processing module of perception in ISP receives the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business;
The collaborative processing module of perception in ISP receives after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
Optionally, described method also includes: described caching server, after the service request receiving described client, notifies that processing module is worked in coordination with in the perception in described ISP.
Optionally, the collaborative processing module notice SDN controller of perception in described ISP, sets up being achieved in that of the secure link that can meet described business need from described available cache memory server to client: issue stream table to the OpenFlow network link;
After the collaborative processing module of perception in described ISP receives the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller.
Optionally, also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server.
Optionally, the IP address list of described client source IP and available candidate caching server is sent to the perception in ISP by " request " message and works in coordination with processing module by described load-balanced server;
The described IP address list after sequence is sent to the load-balanced server in CDN with " response " message;
Essential information involved by described business is sent to the perception in ISP by " determination " message and works in coordination with processing module by the described caching server for client offer service;
It is sent to caching server by the collaborative processing module of perception with " OK " message after described secure link establishment;
Described caching server and described client are sent to the collaborative processing module of perception with " complete " message after completing alternately.
In order to achieve the above object, the embodiment of the invention also discloses a kind of CDN and ISP and work in coordination with the device processing data, described device includes: ISP network, CDN and user side, and user side includes client; Described ISP network includes: network information database, perception collaborative processing module, SDN controller; Described CDN includes: caching server and load-balanced server;
The described load-balanced server in CDN, asks for the inquiry of the domain name received from client, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;
Processing module is worked in coordination with in perception in described ISP network, for sending, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up, the IP address list after sequence is sent to the load-balanced server in CDN;
Load-balanced server in described CDN, for according to the IP address list after sequence, and the current state of caching server in own net, it is determined that the final caching server that service is provided for client, the IP address of determined caching server is fed back to client;
The described caching server providing service for client, for receiving after the service request of client, is sent to the collaborative processing module of the perception in ISP by the essential information involved by described business; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client;
Processing module is worked in coordination with in perception in described ISP, for receiving the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business; The collaborative processing module of the described perception in ISP is additionally operable to receive after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
Optionally, processing module is worked in coordination with in perception in described ISP, after being additionally operable to receive the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller.
Optionally, also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server.
Optionally, the IP address list of described client source IP and available candidate caching server is sent to the perception in ISP by " request " message and works in coordination with processing module by described load-balanced server;
The described IP address list after sequence is sent to the load-balanced server in CDN with " response " message;
Essential information involved by described business is sent to the perception in ISP by " determination " message and works in coordination with processing module by the described caching server for client offer service;
It is sent to caching server by the collaborative processing module of perception with " OK " message after described secure link establishment;
Described caching server and described client are sent to the collaborative processing module of perception with " complete " message after completing alternately.
Embodiments providing a kind of CDN and ISP and work in coordination with the method and device that process data, the inquiry of the domain name that in the method, the load-balanced server in CDN receives from client is asked, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;The collaborative processing module of perception in ISP network sends, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up, the IP address list after sequence is sent to the load-balanced server in CDN; Load-balanced server in CDN is according to the IP address list after sequence, and the current state of caching server in own net, determine the final caching server that service is provided for client, the IP address of determined caching server is fed back to client; The described caching server for client offer service receives after the service request of client, and the essential information involved by described business is sent to the collaborative processing module of the perception in ISP; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client; The collaborative processing module of perception in ISP receives the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business; The collaborative processing module of perception in ISP receives after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
Applying technical scheme provided by the present invention, ISP has known the caching server providing service for client that CDN selects, and interaction complexity is low, it is achieved simple. In technical solution of the present invention, owing to ISP has known the caching server providing service for client that CDN selects, thus ISP can grasp network actual flow in real time, better cooperation is provided for the data that process collaborative between CDN and ISP, further, according to network actual flow, ISP network can utilize SDN technology to process routing congested, flexible in real time, network monitored more flexibly and manages, improving Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the system configurations figure schematic diagram of the prior art two relevant to the embodiment of the present invention;
Fig. 2 works in coordination with the apparatus structure schematic diagram processing data for a kind of CDN and ISP that the embodiment of the present invention provides;
Fig. 3 works in coordination with the method flow schematic diagram processing data for a kind of CDN and ISP that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiments provide a kind of CDN and ISP and work in coordination with the method and device that process data, specific reference to Fig. 3, Fig. 3 works in coordination with the schematic flow sheet of the method processing data for a kind of CDN and ISP that the embodiment of the present invention provides, network information database, perception collaborative processing module, SDN controller is comprised in the network of described ISP place, described CDN includes caching server and load-balanced server, described user side includes client and local dns server, and described method comprises the following steps:
The inquiry of the domain name that load-balanced server in step S1:CDN network receives from client is asked, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP.
This concrete step may include that
Time client obtains content by browser, first passing through DNS network analysis to corresponding IP address, therefore the first step is client to the corresponding domain name of local dns server request analysis;
If local dns server can not resolve this domain name, inquiring about by iterative process, finally this DNS query can arrive the load-balanced server of CDN service provider;
CDN load-balanced server selects some available caching servers according to source IP address and the client ip address of DNS request, and the information such as the IP address list of source IP address and available caching server are sent to the collaborative processing module of perception of operator by load-balanced server with " request " message.
Step S2: the collaborative processing module of perception sends, according to load-balanced server, the message of coming, Query Information in network information database, network information database stores the details of basic network topology, including route, link, link utilization, routing overhead and change in topology information, the connectivity information of network and the information path by network, and according to these information, described available candidate caching server is ranked up according to the ISP rule defined, and the IP address after sequence is returned to CDN load-balanced server with " response " message.
Load-balanced server in step S3:CDN network is according to the IP address list after sequence, and the current state of caching server in own net, determine the final caching server that service is provided for client, the IP address of determined caching server is fed back to client.
Concrete step may include that
Load-balanced server in CDN, according to the suggestion of ISP and can use or unusable state of CDN caching server, will provide the IP address of the client-cache server serviced be returned to local dns server for client. So-called available or unavailable caching server judgement be by load-balanced server collect the status information of server, free time whether, cache information, go to determine which caching server may finally provide for client according to these information and service which caching server and can not think that client provides service.
Step S4: the described caching server for client offer service receives after the service request of client, and the essential information involved by described business is sent to the collaborative processing module of the perception in ISP;Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client.
Concrete step may include that
Caching server corresponding to IP address that client provides to local dns server sends HTTP request;
In CDN, the caching server for described offering customers service receives after the HTTP request of client, minimum transfer rate is determined according to request content, and by the source IP address of client, the IP address of caching server, minimum transfer rate, and transmission priority information is sent to the collaborative processing module of perception of ISP with " determination " message.
The collaborative processing module of perception in step S5:ISP receives the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business.
Concrete step may include that
The collaborative processing module of perception is notified that SDN controller sets up a secure link meeting business need from CDN caching server to client according to the CDN information being sent to ISP with " determination " message, and the mode being established by issuing stream table to the OpenFlow network in ISP of this link realizes.
The method of application embodiment illustrated in fig. 3, ISP has known the caching server providing service for client that CDN selects, and interaction complexity is low, it is achieved simple. In technical solution of the present invention, owing to ISP has known the caching server providing service for client that CDN selects, thus ISP can grasp network actual flow in real time, better cooperation is provided for the data that process collaborative between CDN and ISP, further, according to network actual flow, ISP network can utilize SDN technology to process routing congested, flexible in real time, network monitored more flexibly and manages, improving Consumer's Experience.
Work in coordination with on the method basis of process data at a kind of CDN and the ISP provided for the embodiment of the present invention shown in Fig. 3, also include:
Described caching server, after the service request receiving described client, notifies that processing module is worked in coordination with in the perception in described ISP; After the collaborative processing module of perception in described ISP receives the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller;
Also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server;
Application the embodiment above, after described caching server and described client complete alternately, the stream table that SDN controller is corresponding when deleting mutual, save Internet resources, improve the utilization rate of network.
Fig. 2 works in coordination with the device schematic diagram processing data for a kind of CDN and ISP that the embodiment of the present invention provides, and this device includes: ISP network, CDN and user side, user side includes client.
ISP network includes: network information database, the collaborative processing module of perception and SDN controller;
CDN includes: caching server and load-balanced server;
Load-balanced server in CDN, asks for the inquiry of the domain name received from client, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;
Processing module is worked in coordination with in perception in ISP network, for sending, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up according to the ISP rule defined, the IP address list after sequence is sent to the load-balanced server in CDN;
Load-balanced server in CDN, for according to the IP address list after sequence, and the current state of caching server in own net, it is determined that the final caching server that service is provided for client, the IP address of determined caching server is fed back to client;
Client provides the caching server of service, for receiving after the service request of client, the essential information involved by described business is sent to the collaborative processing module of the perception in ISP; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client;
Processing module is worked in coordination with in perception in ISP, for receiving the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business; The collaborative processing module of the described perception in ISP is additionally operable to receive after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
A kind of CDN and ISP that application drawing 2 show the embodiment of the present invention and provides works in coordination with the apparatus structure schematic diagram processing data, and ISP has known the caching server providing service for client that CDN selects, and interaction complexity is low, it is achieved simple. In technical solution of the present invention, owing to ISP has known the caching server providing service for client that CDN selects, thus ISP can grasp network actual flow in real time, better cooperation is provided for the data that process collaborative between CDN and ISP, further, according to network actual flow, ISP network can utilize SDN technology to process routing congested, flexible in real time, network monitored more flexibly and manages, improving Consumer's Experience.
On embodiment illustrated in fig. 2 apparatus structure schematic diagram basis, also include:
Processing module is worked in coordination with in perception in described ISP, and after being additionally operable to receive the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller;
Also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server;
Application said apparatus, after described caching server and described client complete alternately, the stream table that SDN controller is corresponding when deleting mutual, save Internet resources, improve the utilization rate of network.
The IP address list of described client source IP and available candidate caching server is sent to the perception in ISP by " request " message and works in coordination with processing module by described load-balanced server;
The described IP address list after sequence is sent to the load-balanced server in CDN with " response " message;
Essential information involved by described business is sent to the perception in ISP by " determination " message and works in coordination with processing module by the described caching server for client offer service;
It is sent to caching server by the collaborative processing module of perception with " OK " message after described secure link establishment;
Described caching server and described client are sent to the collaborative processing module of perception with " complete " message after completing alternately.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially. And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment. When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
Each embodiment in this specification all adopts relevant mode to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is the difference with other embodiments. Especially for device embodiment, owing to it is substantially similar to embodiment of the method, so what describe is fairly simple, relevant part illustrates referring to the part of embodiment of the method.
One of ordinary skill in the art will appreciate that all or part of step realizing in said method embodiment can be by the hardware that program carrys out instruction relevant and completes, described program can be stored in computer read/write memory medium, the storage medium obtained designated herein, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention. All make within the spirit and principles in the present invention any amendment, equivalent replacement, improvement etc., be all contained in protection scope of the present invention.
Claims (9)
1. CDN Yu ISP works in coordination with the method processing data, it is characterized in that, network information database, perception collaborative processing module, SDN controller is comprised in the network of described ISP place, described CDN includes caching server and load-balanced server, described user side includes client, and described method includes:
The inquiry of the domain name that load-balanced server in CDN receives from client is asked, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;
The collaborative processing module of perception in ISP network sends, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up, the IP address list after sequence is sent to the load-balanced server in CDN;
Load-balanced server in CDN is according to the IP address list after sequence, and the current state of caching server in own net, determine the final caching server that service is provided for client, the IP address of determined caching server is fed back to client;
The described caching server for client offer service receives after the service request of client, and the essential information involved by described business is sent to the collaborative processing module of the perception in ISP; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client;
The collaborative processing module of perception in ISP receives the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business;
The collaborative processing module of perception in ISP receives after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
2. CDN and ISP according to claim 1 works in coordination with the method processing data, it is characterised in that described method also includes: described caching server, after the service request receiving described client, notifies that processing module is worked in coordination with in the perception in described ISP.
3. CDN and ISP according to claim 2 works in coordination with the method processing data, it is characterized in that, the collaborative processing module notice SDN controller of perception in described ISP, sets up being achieved in that of the secure link that can meet described business need from described available cache memory server to client: issue stream table to the OpenFlow network link;
After the collaborative processing module of perception in described ISP receives the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller.
4. CDN and ISP according to claim 1 works in coordination with the method processing data, it is characterized in that, also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server.
5. CDN and ISP according to claim 1 works in coordination with the method processing data, it is characterized in that, the IP address list of described client source IP and available candidate caching server is sent to the perception in ISP by " request " message and works in coordination with processing module by described load-balanced server;
The described IP address list after sequence is sent to the load-balanced server in CDN with " response " message;
Essential information involved by described business is sent to the perception in ISP by " determination " message and works in coordination with processing module by the described caching server for client offer service;
It is sent to caching server by the collaborative processing module of perception with " OK " message after described secure link establishment;
Described caching server and described client are sent to the collaborative processing module of perception with " complete " message after completing alternately.
6. CDN Yu ISP works in coordination with the device processing data, it is characterised in that including: ISP network, CDN and user side, user side includes client; Described ISP network includes: network information database, perception collaborative processing module, SDN controller; Described CDN includes: caching server and load-balanced server;
The described load-balanced server in CDN, asks for the inquiry of the domain name received from client, and domain name inquiry request includes client source IP address; Load-balanced server selects the IP address list of the available candidate caching server corresponding with described client source IP address, and the IP address list of described client source IP and available candidate caching server is sent to the collaborative processing module of the perception in ISP;
Processing module is worked in coordination with in perception in described ISP network, for sending, according to load-balanced server, the message of coming, requester network information database, according to the network state information of record in network information database, described available candidate caching server is ranked up, the IP address list after sequence is sent to the load-balanced server in CDN;
Load-balanced server in described CDN, for according to the IP address list after sequence, and the current state of caching server in own net, it is determined that the final caching server that service is provided for client, the IP address of determined caching server is fed back to client;
The described caching server providing service for client, for receiving after the service request of client, is sent to the collaborative processing module of the perception in ISP by the essential information involved by described business; Involved essential information includes client source IP address, provides the IP address of the caching server of service, the minimum speed limit required by business for client;
Processing module is worked in coordination with in perception in described ISP, for receiving the message from caching server, record client source IP address and the corresponding relation of IP address of caching server of service is provided for described client, notice SDN controller, sets up the secure link that can meet described business need from described available cache memory server to client; Described notice includes the minimum speed limit required by business; The collaborative processing module of the described perception in ISP is additionally operable to receive after the link establishment from SDN controller completes information, and the described caching server providing service for client of notice, so that described caching server starts to interact with described client.
7. a kind of CDN and ISP according to claim 6 works in coordination with the device processing data, it is characterized in that, processing module is worked in coordination with in perception in described ISP, after being additionally operable to receive the notice that described caching server and described client complete alternately, described caching server and described client stream table corresponding to respective links time mutual deleted by notice SDN controller.
8. a kind of CDN and ISP according to claim 6 works in coordination with the device processing data, it is characterized in that, also including local dns server in described user side, the client in described user side is interacted with the load-balanced server in described CDN by described local dns server.
9. a kind of CDN and ISP according to claim 6 works in coordination with the device processing data, it is characterized in that, the IP address list of described client source IP and available candidate caching server is sent to the perception in ISP by " request " message and works in coordination with processing module by described load-balanced server;
The described IP address list after sequence is sent to the load-balanced server in CDN with " response " message;
Essential information involved by described business is sent to the perception in ISP by " determination " message and works in coordination with processing module by the described caching server for client offer service;
It is sent to caching server by the collaborative processing module of perception with " OK " message after described secure link establishment;
Described caching server and described client are sent to the collaborative processing module of perception with " complete " message after completing alternately.
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