Distributed Internet of Vehicles MAC layer time slot resource adaptive selection method

Abstract

The invention provides a distributed Internet of Vehicles MAC layer time slot resource adaptive selection method, which is used for vehicle nodes in the Internet of Vehicles to select time slot resources, and mainly comprises two parts of signal transmitting power adaptive control and time slot opposite selection. Through power adaptive control, vehicle nodes in the Internet of Vehicles can adaptively and dynamically adjust the signal transmitting power in a distributed manner according to the real-time change condition of traffic flow density, so that the communication range of the vehicle nodes is adjusted; through opposite time slot selection, vehicle nodes in different driving directions can adaptively select available time slots in a communication range. Therefore, the vehicle nodes in the Internet of Vehicles can adaptively and reasonably select available time slots for communication according to traffic flow conditions of different time periods and different sections through combination of the two, the situation that time slot resources of an MAC layer of the Internet of Vehicles are wasted or insufficient is avoided, and the utilization efficiency of network resources is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of media access in the communication technology, and in particular relates to a method for adaptively selecting time slot resources at the MAC layer of the distributed Internet of Vehicles. Background technique [0002] With the development of vehicle communication systems and the gradual maturity of mobile ad hoc network technology, in order to realize real-time, dynamic and intelligent management of vehicles, a short-range communication (Dedicated Short Range Communications, DSRC) technology for vehicle networking has emerged. Through DSRC between vehicle nodes and between vehicle nodes and roadside nodes, point-to-multipoint and point-to-point methods are used to conduct two-way interaction of information such as position, speed, road environment and equipment status, and collect information from vehicles to vehicles, vehicles and roadsides The devices are organically connected, and when dangerous road co...

AI Technical Summary

Problems solved by technology

However, these schemes also have the following disadvantages: firstly, it is difficult to judge the frame length of each node in this method; secondly, even if the frame length of each node can be judged, because the frame lengths of the nodes are different, it is difficult to allocate time slot

Therefore, this method is not very practical

[0009] To sum up, in the prior art, the TDMA technology-based time slot resource allocation mechanism at the MAC layer of the Internet of Vehicles cannot flexibly adapt to the dynamic change of vehicle node density, so the practicability is poor

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