Application Of Wireless Sensor Network In The "Green" Lighting System

Wireless Sensor Network (WSN) is a new technology in the field of informationcommunication. Thanking to sensor technology, embedded technology and wirelesscommunication technology, WSN can sense, supervise and collect the information ofthe sensed objects in all kinds of environment, obtaining the exact information of thesensed objects through coorperative information processing, and sending theinformation to the users who need them. This paper applies WSN in the lightingsystem, such as street lighting system and gymnasium lighting system, in order torealize highly intelligentized management of lighting equipment, saving power andrealize "green" lighting.First, this paper introduces the basic concept, characteristics and studies onnetwork protocals of wireless sensor network, as well as its core technology andapplication fields. Second, on the basis of analizing the problems the lighting systemfaces in China and comparing the corrent solutions, this paper puts forward a solutionof applying the WSN in the lighting system. After studying and comparing serveraltypical WSN MAC protocals, according to the characteristics of lighting system, thispaper introduces a simplified MAC protocal—LMAC (Light MAC) and implementsnetwork simulation using NS2, verificating its feasibility and reliability. The paperobtains a not bad result through comparing LMAC with S-MAC(Sensor MAC) on thenetwork performance of reducing network delay. Last but not least, the paper laysemphasis on the design of network nodes, introducing the hardware configuration of anode. This paper presents the developping process of the main embedded softwareand implements simulation and debugging on EasyARM2131 board.