Transportation information publishing and retrieving method based on named data networking (NDN)

Abstract

The invention discloses a transportation information publishing and retrieving method based on named data networking (NDN). The method comprises the following specific steps: recommending a data naming mechanism: names are partitioned into five basic layers; publishing transportation information: a source vehicle node forwards a generated data packet to the periphery, and vehicle nodes receiving the data packet cache the data packet and continually forward the data packet outwards in a broadcasting way; and retrieving the transportation information: a requester vehicle node transmits an interest packet outwards, and returns the data packet according to a naming prefix matching rule of the NDN. According to the transportation information publishing and retrieving method based on an NDN mechanism without any central server in a VANET (Vehicular Ad-hoc Network), vehicles in a whole network are self-organized, and each vehicle node plays the roles of a producer, a consumer and a forwarder, so that the vehicles can forward and cache information through the NDN mechanism, and vehicle drivers can rapidly and efficiently inquire relevant transportation information of a certain geographical position through other vehicles without the assistance of the central server used in a conventional mode.

Description

technical field [0001] The invention relates to the technical field of traffic information publishing, in particular to a method for publishing and retrieving traffic information based on a data naming network. Background technique [0002] With the rapid development of modern transportation and the automobile industry, the number of automobiles in my country has increased sharply. Frequent traffic accidents, increasingly serious traffic jams, and users' strong Internet access requirements have jointly promoted the intelligent transportation system ITS (Intelligent Transportation System). System) development. In order to provide applications such as improving road safety and improving traffic efficiency, and to meet the needs of drivers for traffic information, traffic information publishing and retrieval applications emerged as the times require. [0003] Under the current TCP / IP network architecture, vehicles need to be equipped with sensors and communication devices, whic...

AI Technical Summary

Problems solved by technology

[0007] (2) Mobile problem

In the Internet, IP has dual semantics. It not only represents the host, but also represents the physical location of the network. If the node moves a large distance, the IP address may need to be changed, so it is not conducive to the movement of vehicle nodes in the network;

[0008] (3) need to use the central server

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