Air-ground integrated Internet of Vehicles information transmission method based on fog computing and intelligent traffic

Abstract

The invention belongs to the technical field of air-ground integrated Internet of Vehicles communication. The invention discloses an air-ground integrated Internet of Vehicles information transmissionmethod based on fog computing and intelligent traffic. The information transmission method based on fog computing is adopted for the problems existing in the prior art. An information transmission problem is formalized into a multi-objective optimization problem related to a link transmission rate, a link switching frequency and a network copy number; the number of times of link switching and thelink transmission rate are optimized in a combined manner; the number of network copies is optimized on the premise of ensuring the link reliability; transmission is carried out in a storage-carrying-forwarding opportunity transmission mode, and the unmanned aerial vehicle and the parking vehicle group are used as fog nodes to assist network communication, so that the network transmission successrate can be effectively improved, and the routing overhead, the transmission time delay and the link switching frequency are reduced. Compared with an existing mechanism, the information transmissionsuccess rate can be effectively improved, and the transmission delay, the routing overhead and the link switching frequency are reduced.

Description

technical field [0001] The invention belongs to the field of air-ground integrated vehicle networking communication technology, and in particular relates to a fog computing-based air-ground integrated vehicle networking information transmission method and intelligent transportation. Background technique [0002] At present, the closest existing technology: as the core infrastructure of a modern intelligent transportation system (Intelligent transportation system, ITS), vehicle networking (Vehicular ad hoc networks, VANETs) has received extensive attention. Through communication between Vehicle-to-vehicle (V2V) and Vehicle-to-infrastructure (V2I), VANETs provide users with various types of services, including road safety, entertainment demand services, location-based services, etc. Future-oriented intelligent transportation system applications require a vehicle networking environment with larger coverage, more flexible and efficient communication methods, and smarter and saf...

AI Technical Summary

Problems solved by technology

[0007] (1) Existing technology 1 is an air-ground cooperative vehicle network architecture that does not take into account that high-speed movement of vehicles or drones will cause frequent link switching and affect link quality

[0008] (2) In existing technology 2, the cooperation between satellite and terrestrial wireless communication network requires data transmission through the satellite-ground link, and the transmission delay is relatively large, which cannot meet the real-time requirements of information transmission.

[0009] (3) Existing technology 3 uses one or more drones as the relay node for communication between two remote ground nodes without considering the problem that multi-copy transmission will consume a large amount of node energy, which may cause the node energy to be exhausted prematurely Exit from the network occurs

[0010] Difficulty in solving the above technical problems: Existing technology 1: Vehicles or drones will move at high speed in the air-ground integrated vehicle network, so the established communication link is unstable, and the link switching will be very frequent, and frequent switching The link will make the link quality worse, which will affect the network performance and reduce the transmission success rate

However, the coverage of vehicles and drones is limited. If the link is not switched frequently, the information cannot be effectively forwarded, which will affect the success rate of information transmission.

Existing technology 2: This technology transmits data through the satellite-ground link. The satellite-ground link has a long transmission path and large transmission loss and interference, so it will cause a large transmission delay and cannot meet the real-time requirements of information transmission.

At present, the methods to reduce transmission loss and interference mainly include increasing the power of the transmitting node and improving the receiving sensitivity of the node. However, if the transmitting power of the node is increased, the energy of the node itself will be greatly consumed, the online time of the node will be reduced, and the life of the network will be reduced, which is limited by existing technology, improving the node receiving sensitivity will greatly increase the cost of the node, and it is difficult to be used in practical applications

Existing technology 3: This technology improves the success rate of information transmission through a large number of replicas, but this solution will also consume a lot of energy of the node itself, reduce the online time of nodes, and reduce the life of the network

Reducing the number of copies will reduce the success rate of information transmission and affect network performance.

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