A rewriting-based anycast method and system in NDN

Abstract

The invention discloses an anycast method based on rewriting in NDN, comprising: a client sends a first request to a first-layer scheduler; the first-layer scheduler selects a server group serving the first request, and sends the first request Rewrite as a second request, and forward the second request to the second-tier scheduler of the selected server farm; the second-tier scheduler selects the server serving the second request, and rewrites the second request as a third request ; The second-level scheduler forwards the third request to the selected server; the server returns the first response message to the second-level scheduler; the second-level scheduler rewrites the first response message into a second response message, and The second response message is returned to the first-level scheduler; the first-level scheduler rewrites the second response message into a third response message, and returns the third response message to the client. The method of the invention can meet the diversified anycast requirements of the NDN network, without destroying the forwarding logic of the forwarding engine of the NDN content router.

Description

technical field [0001] The present invention relates to the technical field of Named Data Networking (NDN), in particular to an anycast method and system based on rewriting in NDN. Background technique [0002] At present, users' access to the Internet has changed from point-to-point communication to content acquisition. The traditional TCP / IP network only transmits content, but does not perceive content, resulting in a large amount of redundant traffic transmission on the network. In order to solve the content explosion caused by content acquisition, the research community proposes a content-centric network NDN, which realizes the decoupling of content and address, as well as the sender and receiver, and provides ubiquitous built-in cache to satisfy users' requirements for content. Asynchronous access with heavy tail characteristics. [0003] There are many large-scale services with billions of dollars in the existing Internet, such as Google, Facebook, WeChat, etc. Thes...

AI Technical Summary

Problems solved by technology

However, the existing NDN transmission mode only provides a simple anycast mechanism based on anycast routing, which cannot meet the flexible and changeable anycast requirements.

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