A method and device for controlling wireless transmission power

Abstract

The invention provides a wireless transmission power control method and a control device. The wireless transmission power control method is applied to a vehicle ad-hoc network system comprising a plurality of OBU nodes. Each OBU node possesses same minimal receiving power and a receiving antenna gain. The control method comprises the following steps of acquiring a running speed of a current OBU node; according to the running speed, acquiring an effective communication distance; according to an emission antenna gain, the receiving antenna gain and the minimal receiving power of the current OBU node and the effective communication distance, determining expected emission power of the current OBU node; adjusting current emission power of the current OBU node so that the current emission power approaches the expected emission power. In the above scheme, through using a moving speed of the OBU node, emission power of a wireless signal of the OBU node is adjusted; a communication conflict among the OBU nodes are reduced and reliability of data transmission among the OBU nodes is guaranteed.

Description

technical field [0001] The invention relates to the technical field of wireless transmission of vehicle ad hoc network, in particular to a control method and a control device of wireless transmission power. Background technique [0002] Vehicle Ad Hoc Network (VANET, Vehiclar Ad Hoc Network) is a mobile ad hoc network (MANET, Mobile Ad Hoc Network) that combines sensor technology, short-distance mobile communication and information processing technology. Composition, to achieve the goal of safe driving of the vehicle. It has various characteristics of ad hoc networks, and also has some inherent characteristics, such as vehicle nodes have communication, storage, and computing functions, and node energy is not limited. The VANET communication mechanism is divided into two types: vehicle-to-vehicle communication (V2V, Vehicle to Vehicle) and vehicle-to-road test unit communication (V2R, Vehicle to RUS). [0003] OBU (On Board Unit) is the on-board unit of VANET. In VANET, mo...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a control method and control device for wireless transmission power to solve the problem that the existing wireless transmission power cannot make full use of wireless resources and the existing method for adjusting wireless transmission power is not suitable for rapid topology changes The vehicle ad hoc network cannot realize wireless power control in real time, resulting in the problem of low reliability of data transmission between OBU nodes

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