Contents I. Introduction
Streetlight is an indispensable part of a city's infrastructure, the main function of which is to illuminate the city's streets during the dark hours of the day. It also has a function to decorate street and even has some effects to reduce traffic accident and street crime [1], [2]. So it is important for the public and city governor to guarantee street lighting normal on and off. In the beginning, street lighting was switched on at dusk and switched off at dawn by manual operation, and then the smart controller was used to switch street lighting on and off automatically based on sunrise/sunset times light intensity of controller surroundings [3] at each transformer station. Although the smart controller can automatically turn streetlight on and off, the cases of street lighting on at daytime and off at night often occur because the smart controller time is wrong or the light sensor is covered with dust or whatever. These increase the public dissatisfaction with improper streetlights and will lead to some potential danger for street vehicle and pedestrian. In order to find out failure streetlight and reduce wasted energy, the maintenance man needs to patrol street by street at night and day. This increases the maintenance and management cost. Since above reasons and streetlight function diversification, the streetlight control by smart controller can't meet with the requirements of streetlight control.
