A large batch of high-efficiency decoding method and system for ship AIS data

Abstract

The present invention discloses a ship AIS (Automatic Identification System) data big batch efficient decoding method and system. The system comprises a satellite or a plurality of base receiving stations for collecting AIS message, a network, an AIS message storage server, a decoding work station and a result storage server. The AIS message is collected to the AIS message storage server through the network, and after the decoding work station performs efficient parallel decoding, a result is stored on the result storage server. The method employs a memory mapping mode to read message files, a message screening filtering function is provided to perform classification transcoding of the message and perform parallel decoding work based on multinuclear CPU computer. In the system work, except the serial operation of two steps of multiple information message screening and multiple information message binary system transcoding, other decoding steps are all subjected to parallel operation so as to improve the CPU utilization rate and improve the IO speed. The ship AIS data big batch efficient decoding method and system allow big batch AIS data decoding to fully utilize the parallel computing capability of the computer multinuclear CPU so as to reach high decoding efficiency.

Description

technical field [0001] The invention relates to the application of concurrent computing technology of computer multi-core CPU and the technical field of ship AIS data decoding, in particular to a method and system for large-volume and high-efficiency decoding of ship AIS data. Background technique [0002] The Automatic Identification System (AIS system for short) is composed of shore-based facilities (base stations) and ship-borne equipment. It is a new type of network technology, modern communication technology, computer technology, and electronic information display technology. Digital aids to navigation systems and equipment. [0003] The Automatic Ship Identification System (AIS) is developed from the IFF of ships and aircrafts. It cooperates with the Global Positioning System (GPS) to combine ship dynamic information such as ship longitude and latitude, ship speed, rate of change of course and course with ship name, call sign, draft and The static information of ships...

AI Technical Summary

Problems solved by technology

[0008] The general message data decoding method is to decode one by one according to the chronological order, but in the face of massive AIS data, the speed of this method is very slow and cannot meet the actual needs. If the decoding program is directly run in parallel on a multi-core CPU computer, there is no guarantee The decoding order of the segmented long information meets the requirements, which will cause errors in the decoded data

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