Expandable anycast method and system based on redirection in NDN (Named Data Networking)

Abstract

The invention discloses an expandable anycast method and system based on redirection in NDN (Named Data Networking). The method comprises the steps that a client sends a first request to a network; an intermediate router forwards the first request to a certain first layer scheduler according to an anycast route; the first layer scheduler selects a server cluster for serving the first request according to a first preset strategy; the first layer scheduler returns a first redirection announcement to the client; the client sends a second request to a second layer scheduler according to the first redirection announcement; the second scheduler selects a server for serving the second request according to a second preset strategy; the second layer scheduler returns a second redirection announcement to the client; the client sends a third request to the selected server according to the second redirection announcement; and the server returns a response message to the client. According to the method and the system, the diversified anycast demands in the NDN can be satisfied without damaging the forwarding logic of a forwarding engine of a content router of the NDN.

Description

technical field [0001] The present invention relates to the technical field of Named Data Networking (NDN), in particular to a redirection-based scalable anycast method and system 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...

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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