Content acquisition method, node and content network

Abstract

The invention discloses a content acquisition method, a content acquisition node and a content network, which belong to the field of communication. The method comprises the following steps of: receiving a content request, wherein the content request at least comprises an identifier of requested contents; judging whether the contents corresponding to the identifier can be locally acquired or not, and if the contents corresponding to the identifier can be locally acquired, locally acquiring the contents corresponding to the identifier; otherwise, querying a name resolution system according to the identifier to obtain a target node corresponding to the identifier, and acquiring the contents corresponding to the identifier from the target node, wherein the name resolution system comprises a hierarchical distributed hash table and a global content resolution structure; and the global content resolution structure supports name aggregation and longest match searching. The node comprises a content agent module and a content acquisition module. The content network comprises the content acquisition node and a transmission network. In the content acquisition method, the content acquisition node and the content network, a content-oriented network architecture is constructed by adopting a distributed scheme, the content delivery efficiency and the safety of the network are improved by introducing an optimization strategy, network investment is reduced, and the network is more adaptive to the rapid increasing of the contents.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a method for obtaining content, a node and a content network. Background technique [0002] Internet technology has experienced more than 40 years of development since its invention. Today's Internet is active with various elements such as Web applications, multimedia audio and video applications, mobility, and hacker attacks. As these elements continue to grow, they also bring unprecedented challenges to the Internet. Especially with the increasing scale of the Internet and the increasing popularity of high-definition video / pictures, the amount of data transmitted on the Internet has grown rapidly in recent years. How to efficiently retrieve content from the Internet has become a topic of increasing concern. [0003] The Internet in the prior art is a host-based architecture, wherein any computer connected to the Internet is called a host, and each host has a unique IP (In...

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Problems solved by technology

[0004] Due to the explosive growth of content transmitted on the Internet, and when the Internet transmits content based on the IP protocol, many clients simultaneously establish sessions with the host where the content resides to obtain the content, resulting in low efficiency of content distribution and congestion of the source server and the network; In order to avoid the above-mentioned network congestion, it is necessary to continuously expand bandwidth and upgrade network equipment, which increases the investment cost of the network; in addition, hackers can cause network paralysis by sending a large number of content requests to the same host, so the current network architecture is still insecure disadvantages, unable to adapt to the rapid growth of content

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