Dynamic conflict-free multiple access method and system in Internet of Vehicles

Abstract

The embodiment of the invention provides a dynamic conflict-free multiple access method and system in Internet of Vehicles, and the method comprises the steps that a target vehicle obtains time slot arrangement sent by a target road side unit, and the time slot arrangement is used for enabling the target road side unit to be allocated to vehicles in a communication range; if the target vehicle isthe vehicle with the time slot allocated to the target road side unit, a corresponding safety data packet is sent to the target road side unit and a one-hop neighbor vehicle of the target vehicle in the corresponding allocation time slot, so that the target road side unit and the one-hop neighbor vehicle of the target vehicle obtain information of the target vehicle according to the safety data packet; and if the target vehicle is the vehicle of which the time slot is not allocated to the target road side unit, a reservation message is sent to the target road side unit, so that the target roadside unit allocates the time slot to the target vehicle at the next synchronization interval. According to the dynamic conflict-free multiple access method and system in the Internet of Vehicles provided by the embodiment of the invention, the transmission delay can be reduced, and the dynamic conflict-free multiple access method and system can well adapt to road traffic variability when the vehicle density is unbalanced.

Description

technical field [0001] The embodiments of the present invention relate to the field of Internet of Vehicles, and in particular, to a method and system for dynamic and conflict-free multiple access in the Internet of Vehicles. Background technique [0002] With the development of road traffic and the increasing rate of traffic accidents year by year, improving road traffic safety has become an important issue to be solved urgently. The vehicle ad hoc network is a highly dynamic topological network that realizes data forwarding in the vehicle environment. It can manage the traffic system and improve road safety. The primary problem to be solved when vehicles are organized into a network for communication is how to arrange the communication channels between vehicles. occupancy, ensuring fair competition among vehicle nodes, reducing access latency, and maximizing channel utilization. [0003] There are mainly three existing methods. The first one is based on backoff competitio...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a dynamic conflict-free multiple access method and system in the Internet of Vehicles to solve the problem that the existing method has a high transmission delay and cannot adapt to the variability of road traffic when the vehicle density is uneven

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