Parking area-based spider web routing protocol in urban VANET

Abstract

The invention discloses a parking area-based spider web routing protocol in an urban VANET, which comprises the following steps: 1, respectively selecting a source road intersection point and a targetroad intersection point, constructing a quadrilateral spider web model area, constructing a parking area-based spider web model layer by layer in the model area, and selecting an optimal transmissionpath; 2, according to the characteristic that the position of the parking area is fixed, dividing nodes with communication capability in the whole network into two types, namely a fixed node and a mobile node, and dividing the nodes into two modes, namely a fixed node mode and a mobile node mode; after the transmission path is selected, performing data forwarding along the path by utilizing a multi-mode greedy algorithm; and 3, when the data packet arrives at the current vehicle forwarding node, placing the data packet into different message queues according to different priorities of the data packet, dynamically adjusting the data packet, and quickly processing the emergency data packet. According to the invention, the parking area and the spider web model are combined to construct a newspider web transmission model based on the parking area, and the transmission time delay and delivery rate of the data packet are obviously improved.

Description

technical field [0001] The invention relates to the technical field of a vehicle ad hoc network (VANET), in particular to a method for implementing a routing protocol related to a vehicle ad hoc network. Background technique [0002] Vehicle Ad Hoc Network (VANET) enables vehicles to communicate with each other and establishes a large-scale network with vehicles as network nodes to achieve road safety, The three major applications of traffic efficiency and information services. However, due to high-speed mobility and dynamic network topology, data generated by various applications may cause network congestion, packet loss and end-to-end delay. Especially when emergency events such as traffic accidents, road damage, and road construction occur, it is necessary to ensure that such emergency data is reliably transmitted to the destination with minimum delay within its effective life cycle. Therefore, how to ensure fast and reliable transmission of urgent data in VANET is a ve...

AI Technical Summary

Problems solved by technology

However, when traffic congestion occurs, as the number of data packets increases, the transmission delay will also increase

In addition, the existing scheduling mechanism does not prioritize urgent data packets, so it cannot efficiently process urgent data in large-scale VANETs

For example, the journals "Mobility-aware ant colonyoptimization routing for vehicular as hoc networks" and "A Spider-Web-LikeTransmission Mechanism for Emergency Data in Vehicular Ad Hoc Networks" proposed ant colony optimization (ACO) and spider-like transmission mechanism (TMED) for VANET. ) bio-inspired algorithm, however, in areas with sparse vehicles, network connectivity becomes poor, this type of bio-inspired algorithm cannot guarantee high packet delivery rate and low transmission delay

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