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Method and device of data obtaining

A data acquisition and acquired technology, applied in the field of communication, can solve problems that have not been proposed and cannot be effectively solved

Inactive Publication Date: 2013-06-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] It can be seen from the above process that after the upstream CDN pre-distributes content to the downstream CDN, when receiving the user content request from the upstream CDN, the downstream CDN will judge whether the target content has been obtained and cached from the upstream CDN, but for the second application The problem in the scenario and the third application scenario, that is, how to judge whether the same content is obtained and cached from other upstream CDNs or the same operator, the above process cannot be effectively solved, so the downstream CDN may still obtain and cache the same content repeatedly Content
[0020] Aiming at the problem that the midstream and downstream CDNs of related technologies may obtain and cache the same content repeatedly, no effective solution has been proposed so far

Method used

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Experimental program
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Effect test

Embodiment 1

[0063] Image 6 It is the CDNI content pre-distribution optimization process. Upstream CDN A and upstream CDN B successively pre-distribute content to the common downstream CDN. When upstream CDN B notifies downstream CDN to pre-distribute content, since the downstream CDN has already cached the same content from the same operator of upstream CDN A, so Upstream CDN B will cancel content pre-distribution to downstream CDN. The specific process includes step S601 to step S609.

[0064] In step S601, the upstream CDN A notifies the downstream CDN to pre-distribute content, and the notification message contains content identification information of the pre-distributed content.

[0065] Step S602 , after receiving the request, the downstream CDN queries the metadata information associated with the content ID of the CDNI according to the content ID, and determines whether the same content has been cached.

[0066] Step S603 , the downstream CDN queries that there is no CDNI assoc...

Embodiment 2

[0075] Figure 7 It is the first CDNI forwarding optimization deduplication process. The upstream CDN redirects the user content request to the downstream CDN. After receiving the user content request, the downstream CDN queries the metadata associated with the CDNI content identifier to determine that the content requested by the user has not been cached, and obtains the content requested by the user from the upstream CDN. Then provide the content to the user. The specific process includes step S701 to step S610.

[0076] Step S701, the user terminal sends a content request to the upstream CDN, and the request carries resource identification information of the target content.

[0077] Step S702, the upstream CDN finds that the downstream CDN is more suitable for providing content for the user according to the location information of the user, and then returns a content redirection response to the user terminal, and the response carries the resource identifier associated wit...

Embodiment 3

[0088] Figure 8 It is the second CDNI forwarding optimization deduplication process. The upstream CDN redirects the user content request to the downstream CDN. After receiving the user content request, the downstream CDN judges that the content requested by the user has been cached, and directly provides the content to the user. The specific process includes step S801 to step S807.

[0089] Step S801, the user terminal sends a content request to the upstream CDN, and the request carries resource identification information of the target content.

[0090] Step S802, the upstream CDN finds that the downstream CDN is more suitable for providing content for the user according to the location information of the user, and then returns a content redirection response to the user terminal, and the response carries the resource identifier associated with the upstream CDN and the address information of the downstream CDN.

[0091] Step S803, after receiving the redirection response, th...

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Abstract

The invention discloses a method and a device of data obtaining. The method is applied to interconnection and interworking of a plurality of content distribution networks (CDNs). The method comprises that when a downstream CDN obtains content from at least one upstream CDN, a content identification list is inquired according to content identifications of the content, wherein the content identifications of all the content obtained by the downstream CDN are stored in the content identification list, and each piece of content only corresponds to one content identification; and when the content identifications of the content are not found in the content identification list of the downstream CDN, the content is obtained from the upstream CDNs. The method and the device of data obtaining can resolve the problem that downstream CDNs in correlation technique repeatedly obtain and cache the same content.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data acquisition method and device. Background technique [0002] With the rapid growth of the transmission volume of video and multimedia content in the network, a single CDN (Content Distribution Network, content distribution network) cannot fully meet the requirements of reducing the cost of network transmission content, Improve the user experience effect and the stability of content transmission. CDNI (Content Distribution Network Interconnection, Content Distribution Network Interconnection Interface) provides a unified interface protocol for the establishment of interconnection and interoperability between different CDNs. Through CDNI, the content business agency relationship between CDN operators, and the content operator only needs to sign an agency business agreement with one (upstream) CDN operator, and other (downstream) CDN operators who have established intercon...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06
CPCH04L67/10
Inventor 金伟毅郝振武王炜
Owner ZTE CORP
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