Index coding based vehicle-mounted network data broadcasting protocol

Abstract

The invention discloses an index coding based vehicle-mounted network data broadcasting protocol. The protocol is implemented by the following steps: step 1, for each transmission node, generating edge information through distributed feedback; step 2, looking for a maximum clique in the edge information; and step 3, performing index coding by applying the maximum clique, coding a message and broadcasting the message. According to the protocol, the index coding is applied to the vehicle-mounted network information broadcasting, so that more efficient information distribution is realized, a least transmission frequency can be effectively reduced, the wireless channel bandwidth is reduced, the broadcasting efficiency is improved, and the problem that broadcast information cannot correctly arrive and cannot be correctly received caused by vulnerability of a wireless channel and high mobility of a vehicle in a vehicle-mounted network in the prior art is solved.

Description

technical field [0001] The invention relates to a vehicle network data broadcast protocol, in particular to a vehicle network data broadcast protocol based on index coding. Background technique [0002] Vehicular Mobile Opportunistic Network (VANET) is developed from the traditional vehicle network. It is a networking method specially designed for vehicle communication and used in environments where communication connections are often interrupted. It has aroused great interest from researchers all over the world. big interest. In the vehicular mobile opportunistic network, the security vehicular network application is one of the most critical and important issues. Through vehicle-to-vehicle communication, safety information is broadcast periodically to avoid potential dangers. [0003] The index coding problem is a special network coding problem, and network coding technology can be used to code messages to save wireless channel bandwidth. However, due to the fragility of...

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Problems solved by technology

[0004] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a data broadcasting protocol for vehicle network based on index coding, which realizes more efficient information distribution by applying index coding to the information broadcasting of vehicle network, and can Effectively reduce the minimum number of transmissions, thereby saving wireless channel bandwidth, improving broadcast efficiency, and overcoming the problem that broadcast information cannot be correctly received and received due to the vulnerability of wireless channels in vehicle-mounted networks and the high mobility of vehicles in the prior art

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