A routing method and device for an information center network

Abstract

An embodiment of the present invention provides a routing method and device for an information center network. The method includes: querying the local pending interest packet PIT table and the local content storage CS table, and querying the local forwarding information base when there is no corresponding content entry Whether there is a content entry corresponding to the target interest packet in the FIB table; if it exists in the local FIB table, forward the target interest packet through a corresponding forwarding port; if it does not exist in the local FIB table, send a forwarding path acquisition request to the controller to Make the controller cooperate with the content router in the first local area network to determine a destination forwarding path from the content router to the destination, and make each content router on the destination forwarding path update their respective FIB tables according to the destination forwarding path; The target Interest is forwarded through an updated forwarding port. By applying the embodiments of the present invention, traffic redundancy can be reduced and the response speed of Interest packets can be improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a routing method and device for an information center network. Background technique [0002] ICN (Information-Centric Internet, Information Center Network) is a brand-new network architecture proposed to solve the problems of IP address shortage and poor security performance in the current network. The distance of content enables users to obtain resources from multiple paths and achieve resource access faster. For example, NDN (Named Data Internet, Named Data Network) is a representative ICN architecture. By naming the content, it decouples the content from the location, relies on the content name for pathfinding, and uses the name of the information to represent each information. There are two formats of messages in NDN: Interest packets and data packets. Both the interest packet and the data packet contain content name information, the content name information in the ...

AI Technical Summary

Problems solved by technology

[0009] In traditional NDN, because the content entries of the Interest packets in the FIB table record all the forwarding ports where the data packets corresponding to the Interest packets are located, the Interest packets will be forwarded from all reachable forwarding ports, and the network will Transmitting a large number of repeated Interest packets can improve the response speed of Interest packets, but it will cause a large amount of traffic redundancy in the network

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