Vehicle-mounted network data distribution method on basis of collaborative optimization sign bit encoding

Abstract

The invention relates to a vehicle-mounted network data distribution method on the basis of collaborative optimization sign bit encoding. The vehicle-mounted network data distribution method comprises the following steps that a data distribution center distributes data on vehicle nodes in a selected region in a broadcasting manner by arranged base stations, wherein each vehicle node is provided with a single radio wireless receiver and each base station has the same source file F obtained from the data distribution center; sign bit encoding is applied to encode the distributed data and when the vehicle nodes are positioned in the broadcasting range of the base stations, the base stations broadcast the data to the vehicle nodes in a circulating manner; and when the vehicle nodes are positioned beyond the broadcasting range of the base station, the vehicle nodes are self-organized mutually to form a mobile network and a group of relay nodes are selected among the vehicle nodes so as to collaboratively distribute the data among the vehicle nodes and implement data collaborative broadcasting distribution on the basis of encoding. The method disclosed by the invention can be more flexibly suitable for the dynamic environment of the vehicle-mounted network; and compared with a conventional network encoding mode, the vehicle-mounted network data distribution method has high encoding rate, large network throughput and short distribution time delay.

Description

technical field [0001] The application of the present invention relates to a method for data distribution in Vehicular Ad-hoc Networks (VANETs, ​​VANETs for short), and in particular to a method for distributing data in a vehicular network based on collaborative optimization sign bit coding. The invention helps to improve the data distribution rate in the vehicle network. The present invention completes the distribution of data in the vehicle-mounted network by performing sign bit encoding on the distribution data, combined with technologies such as optimized run length coding, dynamic programming, and fuzzy average rank, and using a cooperative data broadcast distribution mechanism based on coding and data validity to meet It satisfies the demand for efficient data distribution in the vehicle network, thereby providing distribution support for applications such as traffic safety and inter-vehicle entertainment, and belongs to the field of network communication technology. B...

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is: network coding is beneficial to the data distribution of the vehicular network, but the coding efficiency and coding speed of the network coding method currently applied to the vehicular network are not ideal, and a large amount of redundant data may be generated, and the intelligent distribution small file

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