Data retrieval and pushing method based on NDN and SDN

Abstract

The invention discloses a data retrieval and pushing method based on NDN and SDN, and belongs to the technical field of computer networks. According to the method, an original distributed NDN architecture and an SDN architecture are fused, a central controller is introduced, push-based data packet sending is realized from a global perspective through the central controller and a source routing technology, PIT and FIB tables are removed, the performance of a router is thoroughly liberated, the traffic in a network is reduced, and the processing delay of the router is greatly shortened; the router timely notifies the changed content of the CS to the central controller, and the central controller selects the routing node with the lowest cost from the consumer, and flexibly and effectively distributes the content notification, so that the CS is utilized to the maximum extent, and the data acquisition time delay is reduced. The method can be applied to the field of information retrieval and the like, and the technical defects that according to a traditional NDN architecture, time delay of matching search processing in an FIB is too long, and content announcements cannot be flexibly and effectively distributed are overcome.

Description

technical field [0001] The invention relates to a data retrieval and pushing method based on a named data network (Named Data Networking, NDN) and a software-defined network (Software-Defined Networking, SDN), which belongs to the technical field of computer networks. Background technique [0002] Named Data Networking (NDN) is centered on data content. Unlike the existing TCP / IP network addressing method based on IP addresses, NDN sets the content name as the addressing method, and establishes a routing table based on the content name for communication. , which decouples the relationship between data content and location. Compared with the server-centric communication mode, in the NDN architecture, the data content has nothing to do with the location, so it is very suitable for data retrieval. [0003] The transmission mechanism of the NDN network is to communicate data through the way that users send interest packets to drive content producers to reply data packets, and b...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical defects of "the matching search processing delay in the FIB is too long" and "the content notification cannot be distributed flexibly and effectively" in the traditional NDN architecture, and proposes a flexible data based on the NDN-SDN fusion architecture. Retrieval method, used in the field of information retrieval, to solve the above problems existing in the traditional NDN architecture

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