Real-time motorcade communication performance analysis method based on 802.11 p at traffic intersection

Abstract

The invention provides a real-time motorcade communication performance analysis method based on 802.11 p at a traffic intersection, which can accurately describe the communication real-time change process of an unsteady state process, and in the complexity formula of the calculation method, the model is simple and reasonable, and the traffic accident occurrence frequency at the traffic intersection can be effectively reduced. In the technical scheme of the invention, the method comprises the following steps: firstly, constructing a network communication model in a multi-lane intersection sceneunder the control of traffic lights; secondly, designing a moving model of multiple motorcades at the road intersection; converting a Markov back-off process under an 802.11 p EDCA mechanism into a linear system in a Z domain to calculate average communication performance; and finally, obtaining an 802.11 p real-time performance analysis method by utilizing a Fluid-Flow (fluid flow) model.

Description

technical field [0001] The invention relates to the technical field of vehicle wireless communication, in particular to an 802.11p-based real-time fleet communication performance analysis method at traffic intersections. Background technique [0002] In modern traffic control, Vehicle Ad Hoc Network (VANET), as one of the most important applications in Intelligent Transportation System (ITS), is evolving to Internet of Vehicles (IoV) to meet the requirements of road safety and Quality of Service (QoS) for autonomous vehicles. ) needs. [0003] In IoV, autonomous vehicles usually drive in a convoy; in convoy strategy, the lead vehicle drives on the road, and several member vehicles follow the lead vehicle one after the other in the same lane. Such as figure 1 As shown, the leader vehicle 1 (LeaderVehicle) is driven by a human, and controls the driving strategy of the entire team, including speed, acceleration, distance within the fleet and distance outside the fleet, etc.; ...

AI Technical Summary

Problems solved by technology

[0007] For the IEEE 802.11p performance research method for V2V communication in the existing technology, the real-time communication performance of the unsteady process cannot be studied, the real-time communication status of the fleet cannot be accurately described, and the complete and timely communication of the fleet at the traffic intersection cannot be ensured. For the problem of data transfer, the present invention provides a real-time fleet communication performance analysis method based on 802.11p at a traffic intersection, which can accurately describe the real-time communication change process of the unsteady process, and the calculation method complexity is simple and reasonable, Can effectively reduce the frequency of traffic accidents at traffic intersections

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