CN102136969A - Method, device and system for probing link quality - Google Patents
Method, device and system for probing link quality Download PDFInfo
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- CN102136969A CN102136969A CN2011100396486A CN201110039648A CN102136969A CN 102136969 A CN102136969 A CN 102136969A CN 2011100396486 A CN2011100396486 A CN 2011100396486A CN 201110039648 A CN201110039648 A CN 201110039648A CN 102136969 A CN102136969 A CN 102136969A
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Abstract
The invention relates to the technical field of communication, in particular to a method, a device and a system for probing link quality. The method comprises the following steps: according to the IP (Internet protocol) address of a stored DNS (Domain Name Server), acquiring an edge node in a CDN (Content Delivery Network) for executing a probe task; and transmitting the probe task to the edge node, wherein the edge node carries out link quality probe on the DNS according to the probe task. By using the method, the device and the system probing the link quality, as the edge node carries out the link quality probe on the DNS, no virtual probe terminal does need to be distributed, the data of the link quality can be more accurately acquired, and the actual conditions of the link can be better reflected.
Description
Technical field
The present invention relates to technical field of communication, relate in particular to detecting link method for quality, device and system.
Background technology
CDN (Content Delivery Network, content distributing network) be by in existing the Internet, increasing the new network architecture of one deck, with the content release of website near the network edge node of user terminal, make user terminal can obtain required content nearby, solve crowded or different I SP (the Internet Service Provider of the Internet Internet, Internet service provider) problem of network bottleneck improves the response speed that user terminal obtains data.The detailed process that the request of user terminal is directed to suitable fringe node is as follows: the domain name (being assumed to be www.b.com) of the domain name (being assumed to be www.a.com) of client web site among the CDN being pointed to CDN service provider by CNAME.When the web site contents of user terminal requests www.a.com, Local DNS (Domain Name Server, name server) will send the domain name request service.This domain name request is forwarded to the name server of CDN service provider by CNAME, and the name server of CDN service provider can draw the IP address of fringe node according to own global traffic dispatching algorithm, and returns to LocalDNS.Local DNS returns to Internet user's terminal with this IP address, and user terminal passes through the content of this IP address access websites again.
At present, the global traffic dispatching algorithm comprise dispatching algorithm based on load capacity, based on the dispatching algorithm of link with based on the dispatching algorithm of cost.Wherein, need the link quality data of node and network based on the dispatching algorithm of link, in the prior art, all that are deployed in the appointed area by Synthesis Department are surveyed terminals and fringe node is carried out the Ping order are surveyed and obtain this link quality data.Such analog detection depends on the influence of factors such as the quantity of surveying terminal and residing network condition thereof, with actual conditions certain difference is arranged, and can not react the link condition of actual user to fringe node, thereby influence the preparatory of global traffic scheduling.
Summary of the invention
The embodiment of the invention provides a kind of detecting link method for quality, device and system, surveys by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, obtains link quality data more accurately.
The embodiment of the invention provides a kind of detecting link method for quality, and this method comprises:
According to the Internet protocol IP address of the name server of storing, obtain the fringe node of carrying out detection mission among the content distributing network CDN;
Detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.
Accordingly, the embodiment of the invention provides a kind of device of detecting link quality, comprising:
The fringe node acquisition module is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN;
Detecting module is used for detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.
Accordingly, the embodiment of the invention provides a kind of system of detecting link quality, comprising: control centre, fringe node and name server;
Described control centre is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN; Detection mission is sent to described fringe node;
Described fringe node is used for according to described detection mission the domain name server being carried out link-quality and surveys.
The embodiment of the invention provides a kind of detecting link method for quality, device and system, is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN; Detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.The detecting link method for quality, device and the system that use the embodiment of the invention to provide, survey by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, make that the link quality data obtain is more accurate, preferable reaction actual link condition.And the affiliated area according to the IP address correspondence of name server obtains fringe node, has guaranteed the fringe node that obtains and the close together of name server, and then has obtained link quality data more accurately.The link quality data of having avoided obtaining in the prior art the place one's entire reliance upon quantity of detection terminal of layout and the problem of network condition thereof.
Description of drawings
Fig. 1 is the system schematic of detecting link quality in the embodiment of the invention;
Fig. 2 is a detecting link method for quality schematic flow sheet in the embodiment of the invention;
Fig. 3 is a detecting link method for quality schematic flow sheet in another embodiment of the present invention;
Fig. 4 is the device schematic diagram of detecting link quality in another embodiment of the present invention.
Embodiment
At length set forth to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
In order to solve the problem that prior art exists, the embodiment of the invention provides a kind of system of detecting link quality, as shown in Figure 1, comprising: control centre 101, fringe node 102 and name server 103;
This control centre 101 is used for the Internet protocol I P address according to the name server 103 of storage, obtains the fringe node 102 of carrying out detection mission among the content distributing network CDN; Detection mission is sent to described fringe node 102;
This fringe node 102 is used for according to described detection mission domain name server 103 being carried out link-quality and surveys.
Concrete, control centre 101 obtains the IP address of name server 103 in IP address list after, set up the corresponding relation of this IP address and this name server 103 affiliated areas, wherein, the affiliated area of this name server 103 represents that by one or more category regions with different priorities for example affiliated area can be expressed as: the category regions of the category regions of the category regions of first priority+second priority+the 3rd priority.The IP address of this name server 103 is stored in the domain name IP address database, and this domain name IP address database is used to store IP address from the name server of domain name mapping service to the domain name system request that cross.
Then, control centre 101 obtains the IP address of name server 103, and the affiliated area of the IP address correspondence of name server 103, and detects whether there is the detection mission that comprises this IP address; If do not exist, then according to the affiliated area of name server 103, obtain the fringe node of carrying out detection mission among the CDN, and generate the detection mission that comprises this IP address, wherein the IP address in this detection mission is corresponding to the affiliated area of name server 103; If exist, judge then whether the affiliated area of IP address correspondence in this already present detection mission is identical with the affiliated area of name server 103; If identical, attonity then; If inequality, according to name server 103 affiliated areas, obtain the fringe node of carrying out detection mission among the CDN, and generate the detection mission that comprises this IP address, wherein the IP address in this detection mission is corresponding to the affiliated area of name server 103.When obtaining the fringe node of carrying out detection mission, obtain the affiliated area of fringe node correspondence earlier; Under the category regions of first priority of the fringe node situation identical,, obtain the fringe node of carrying out detection mission according to the degree of approximation of affiliated area with the category regions of first priority of name server 103IP address correspondence.For example: when the category regions of first priority is that the category regions of ISP, second priority is that the category regions of city, the 3rd priority is under the situation in province, after guaranteeing that the ISP of fringe node is identical, according to the order in city-province, select the higher fringe node of the degree of approximation of a plurality of affiliated areas.By said process, can get access to ISP with the city or with a plurality of fringe nodes in province, the fringe node that obtains is many more, it is accurate more that it carries out the data that detection mission obtains.
Preferable, this system also comprises: domain name IP address database 104 is used to store IP address from the name server of domain name mapping service to the domain name system request that cross;
Preferable, this system also comprises: task library database 107 is used to generate and store detection mission; And this task library database 107 can be separate equipment, also can be positioned at control centre 101.
The data structure of this detection mission is as follows:
Task{
The detection of a target: Local DNS IP
Detection of a target affiliated area: Da Qu+province+city+ISP
The detection source tabulation:
Ip1
Ip2
…
Look-in frequency:
State: issue or do not issue
}
Wherein Da Qu is the set in province, and each province must and only be classified as a Da Qu.
The structure of this link-quality detection data is as follows:
ProbeData{
From: the IP address of carrying out the fringe node of surveying
To:Local DNS IP address
Ping Time:Ping average time
Ping Loss: packet loss
ExecuteTime: time of implementation
ReportTime: report time
}
And whether this control centre 101 regularly provides the domain name mapping service to the name server of the IP address correspondence of detection mission in the assignment database 107, if do not provide, then deletes the detection mission of this IP address.For example, regularly (as 1 month) checks that whether the IP of certain Local DNS visited the CDN name server, if do not visit, then deleted the task of this Local DNS.
Pass through foregoing description, as can be seen, the detecting link method for quality of using the embodiment of the invention to provide, survey by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, make that the link quality data obtain is more accurate, preferable reaction actual link condition.And the affiliated area according to the IP address correspondence of name server obtains fringe node, has guaranteed the fringe node that obtains and the close together of name server, and then has obtained link quality data more accurately.The link quality data of having avoided obtaining in the prior art the place one's entire reliance upon quantity of detection terminal of layout and the problem of network condition thereof.
The embodiment of the invention provides a kind of detecting link method for quality, as shown in Figure 2, can may further comprise the steps:
Concrete, control centre obtains the IP address of name server in IP address list after, set up the corresponding relation of this IP address and this name server affiliated area, wherein, the affiliated area of this name server represents that by one or more category regions with different priorities for example affiliated area can be expressed as: the category regions of the category regions of the category regions of first priority+second priority+the 3rd priority.
Then, control centre obtains the IP address of name server, and the affiliated area of the IP address correspondence of name server, and detects whether there is the detection mission that comprises this IP address; If do not exist, then according to the affiliated area of name server, obtain the fringe node of carrying out detection mission, and generate the detection mission that comprises this IP address, wherein the IP address in this detection mission is corresponding to the affiliated area of name server; If exist, judge then whether the affiliated area of IP address correspondence in this already present detection mission is identical with the affiliated area of name server; If identical, attonity then; If inequality, according to the name server affiliated area, obtain the fringe node of carrying out detection mission, and generate the detection mission that comprises this IP address, wherein the IP address in this detection mission is corresponding to the affiliated area of name server.When obtaining the fringe node of carrying out detection mission, obtain the affiliated area of fringe node correspondence earlier; Under the category regions of first priority of the fringe node situation identical,, obtain the fringe node of carrying out detection mission according to the degree of approximation of affiliated area with the category regions of first priority of name server IP address correspondence.For example: when the category regions of first priority is that the category regions of A, second priority is that the category regions of B, the 3rd priority is under the situation of C, after guaranteeing that the A of fringe node is identical, according to the order of B-C, select the higher fringe node of the degree of approximation of a plurality of affiliated areas.By said process, can get access to ISP with the city or with a plurality of fringe nodes in province, the fringe node that obtains is many more, it is accurate more that it carries out the data that detection mission obtains.
Pass through foregoing description, as can be seen, the detecting link method for quality of using the embodiment of the invention to provide, survey by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, make that the link quality data obtain is more accurate, preferable reaction actual link condition.And the affiliated area according to the IP address correspondence of name server obtains fringe node, has guaranteed the fringe node that obtains and the close together of name server, and then has obtained link quality data more accurately.The link quality data of having avoided obtaining in the prior art the place one's entire reliance upon quantity of detection terminal of layout and the problem of network condition thereof.
Below by specific embodiment the detecting link method for quality that the embodiment of the invention provides is elaborated, as shown in Figure 3, may further comprise the steps:
Step 301, control centre obtain the IP address of name server; The IP address of this name server is stored in the domain name IP address database, and this domain name IP address database is used to store IP address from the name server of domain name mapping service to the domain name system request that cross.
Step 302, control centre set up the corresponding relation of this IP address and this name server affiliated area; The affiliated area of this name server represents that by one or more category regions with different priorities for example affiliated area can be expressed as: the category regions C of category regions B+ the 3rd priority of category regions A+ second priority of first priority.Certainly, this affiliated area can also be expressed as other forms that other those of ordinary skills infer.
Step 303, control centre detect in the task library whether have the detection mission that comprises this IP address; If there is execution in step 304; If there is not execution in step 305;
Step 304, control centre judge whether the affiliated area of IP address correspondence in this already present detection mission is identical with the affiliated area of name server; If identical, attonity then; If inequality, execution in step 305; For example the affiliated area of IP address correspondence is in already present detection mission: A-B1-C1, and the affiliated area of name server is: A-B2-C1, then both are inequality.
Step 305, control centre are obtained the fringe node of carrying out detection mission according to the affiliated area of name server, and generate the detection mission that comprises this IP address, and wherein the IP address in this detection mission is corresponding to the affiliated area of name server.
Step 306, control centre send to the respective edges node with the detection mission of state for not issuing;
After step 307, fringe node receive detection mission, corresponding name server is carried out link-quality survey; Concrete, fringe node can carry out ping to this name server to be surveyed, and obtains relevant informations such as ping time and ping packet loss.
Step 308, fringe node will be surveyed the data that obtain and send to the Data Receiving center;
Preserve after receiving these data at step 309, Data Receiving center, handles so that carry out subsequent analysis.
When obtaining the fringe node of carrying out detection mission in the above-mentioned steps, obtain the affiliated area of fringe node correspondence earlier; Under the category regions of first priority of the fringe node situation identical,, obtain the fringe node of carrying out detection mission according to the degree of approximation of affiliated area with the category regions of first priority of name server IP address correspondence.For example: when the category regions of first priority is that the category regions of ISP, second priority is that the category regions of city, the 3rd priority is under the situation in province, after guaranteeing that the ISP of fringe node is identical, according to the order in city-province, select the higher fringe node of the degree of approximation of a plurality of affiliated areas.By said process, can get access to ISP with the city or with a plurality of fringe nodes in province, the fringe node that obtains is many more, it is accurate more that it carries out the data that detection mission obtains.
Pass through foregoing description, as can be seen, the detecting link method for quality of using the embodiment of the invention to provide, survey by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, make that the link quality data obtain is more accurate, preferable reaction actual link condition.And the affiliated area according to the IP address correspondence of name server obtains fringe node, has guaranteed the fringe node that obtains and the close together of name server, and then has obtained link quality data more accurately.The link quality data of having avoided obtaining in the prior art the place one's entire reliance upon quantity of detection terminal of layout and the problem of network condition thereof.
Accordingly, the embodiment of the invention also provides a kind of device of detecting link quality, as shown in Figure 4, comprising:
Fringe node acquisition module 401 is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN;
Detecting module 402 is used for detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.
Preferable, this device also comprises: set up module 403, be used to set up the corresponding relation of domain name server ip address and domain name server affiliated area, the affiliated area of domain name server is represented by one or more category regions with different priorities.
Preferable, this fringe node acquisition module 401 comprises:
Obtain submodule 4011, be used to obtain the IP address of name server, and the affiliated area of the IP address correspondence of domain name server;
Generate submodule 4014, be used for described detection sub-module testing result when not existing, then according to the affiliated area of domain name server, obtain the fringe node of carrying out detection mission among the CDN, and generation comprises the detection mission of described IP address; Or the judged result of described judgement submodule is when being inequality, according to domain name server affiliated area, obtain the fringe node of carrying out detection mission among the CDN, and generating the detection mission that comprises described IP address, the IP address in the described detection mission is corresponding to the affiliated area of domain name server.
Pass through foregoing description, as can be seen, the detecting link method for quality, device and the system that use the embodiment of the invention to provide, survey by using fringe node that name server is carried out link-quality, need not the detection terminal of placement of dummy, make and to obtain link quality data more accurately, preferable reaction actual link condition.And the affiliated area according to the IP address correspondence of name server obtains fringe node, has guaranteed the fringe node that obtains and the close together of name server, and then has made that the link quality data of obtaining is more accurate.The link quality data of having avoided obtaining in the prior art the place one's entire reliance upon quantity of detection terminal of layout and the problem of network condition thereof.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. a detecting link method for quality is characterized in that, this method comprises:
According to the Internet protocol IP address of the name server of storing, obtain the fringe node of carrying out detection mission among the content distributing network CDN;
Detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.
2. the method for claim 1, it is characterized in that, also comprise: set up the corresponding relation of domain name server ip address and domain name server affiliated area, the affiliated area of domain name server is represented by one or more category regions with different priorities.
3. method as claimed in claim 2 is characterized in that, described IP address according to the name server of storing obtains the fringe node of carrying out detection mission among the content distributing network CDN, comprising:
Obtain the IP address of name server, and the affiliated area of the IP address correspondence of domain name server;
Detect and whether have the detection mission that comprises described IP address;
If do not exist, then according to the affiliated area of domain name server, obtain the fringe node of carrying out detection mission among the CDN, and generate the detection mission that comprises described IP address, the IP address in the described detection mission is corresponding to the affiliated area of domain name server;
If exist, judge then whether the affiliated area of IP address correspondence in the already present detection mission is identical with the affiliated area of domain name server; If inequality, according to domain name server affiliated area, obtain the fringe node of carrying out detection mission among the CDN, and generate the detection mission that comprises described IP address, the IP address in the described detection mission is corresponding to the affiliated area of domain name server.
4. method as claimed in claim 3 is characterized in that, the described fringe node of carrying out detection mission among the CDN that obtains comprises:
Obtain the affiliated area of fringe node correspondence;
Under the identical situation of the category regions of first priority of the IP address correspondence of the category regions of first priority of described fringe node and domain name server,, obtain the fringe node of carrying out detection mission according to the degree of approximation of affiliated area.
5. the method for claim 1 is characterized in that, described fringe node carries out link-quality according to described detection mission to the domain name server to be surveyed, and comprising:
Described fringe node obtains the detection time of domain name server and surveys packet loss.
6. as arbitrary described method among the claim 1-5, it is characterized in that whether the name server that regularly detects the IP address correspondence of detection mission provides the domain name mapping service,, then delete the detection mission of described IP address if do not provide.
7. the device of a detecting link quality is characterized in that, comprising:
The fringe node acquisition module is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN;
Detecting module is used for detection mission is sent to described fringe node, and described fringe node carries out link-quality according to described detection mission to the domain name server and surveys.
8. device as claimed in claim 7 is characterized in that, also comprises:
Set up module, be used to set up the corresponding relation of domain name server ip address and domain name server affiliated area, the affiliated area of domain name server is represented by one or more category regions with different priorities.
9. device as claimed in claim 7 is characterized in that, described fringe node acquisition module comprises:
Obtain submodule, be used to obtain the IP address of name server, and the affiliated area of the IP address correspondence of domain name server;
Detection sub-module is used to detect whether have a detection mission that comprises described IP address;
Judge submodule, be used for described detection sub-module testing result when existing, judge whether the affiliated area of IP address correspondence in the already present detection mission is identical with the affiliated area of domain name server;
Generate submodule, be used for described detection sub-module testing result when not existing, then according to the affiliated area of domain name server, obtain the fringe node of carrying out detection mission among the CDN, and generation comprises the detection mission of described IP address; Or the judged result of described judgement submodule is when being inequality, according to domain name server affiliated area, obtain the fringe node of carrying out detection mission among the CDN, and generating the detection mission that comprises described IP address, the IP address in the described detection mission is corresponding to the affiliated area of domain name server.
10. the system of a detecting link quality is characterized in that, comprising: control centre, fringe node and name server;
Described control centre is used for the Internet protocol IP address according to the name server of storage, obtains the fringe node of carrying out detection mission among the content distributing network CDN; Detection mission is sent to described fringe node;
Described fringe node is used for according to described detection mission the domain name server being carried out link-quality and surveys.
11. system as claimed in claim 10 is characterized in that, also comprises:
The domain name IP address database is used to store IP address from the name server of domain name mapping service to the domain name system request that cross;
The fringe node database, the information that is used to store fringe node;
IP address database is used for the corresponding relation of the category regions of the storing IP address and first priority.
12. system as claimed in claim 10 is characterized in that, also comprises:
The task library database is used to generate and store detection mission;
Data center is used to receive the link-quality detection data that described fringe node sends.
13. system as claimed in claim 12 is characterized in that, described fringe node also is used to obtain the detection time of described local domain name server and survey packet loss, and sends to described data center.
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| CN104734869A (en) * | 2013-12-19 | 2015-06-24 | 华耀(中国)科技有限公司 | Intelligent DNS domain name system and method based on dynamic detection |
| CN106657050A (en) * | 2016-12-15 | 2017-05-10 | 迈普通信技术股份有限公司 | Domain name resolution anomaly detection method, detection management server and gateway equipment |
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| CN111106976A (en) * | 2018-10-26 | 2020-05-05 | 北京金山云网络技术有限公司 | Detection method and device for CDN network, electronic equipment and readable storage medium |
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| CN109688031B (en) * | 2019-03-04 | 2020-11-03 | 腾讯科技（深圳）有限公司 | Network monitoring method and related equipment |
| CN110519121A (en) * | 2019-08-09 | 2019-11-29 | 网宿科技股份有限公司 | A kind of method and device of subregion task detection |
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| CN114157635B (en) * | 2020-09-07 | 2023-08-15 | ***通信集团湖南有限公司 | Domain name back-source method and device for content distribution network, equipment and storage medium |
| CN113872824A (en) * | 2021-08-19 | 2021-12-31 | 网宿科技股份有限公司 | CDN network quality detection method, system, server and storage medium |
| CN114745292A (en) * | 2022-03-14 | 2022-07-12 | 优刻得科技股份有限公司 | Edge container cloud detection method, device, equipment and storage medium |
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