白皮书 Internet of Things: Wireless Sensor Networks

A WSN can generally be described as a network of nodes that cooperatively sense and control the environment, enabling interaction between persons or computers and the surrounding environment [2]. WSNs nowadays usually include sensor nodes, actuator nodes, gateways and clients. A large number of sensor nodes deployed randomly inside of or near the monitoring area (sensor fi eld), form networks through self-organization. Sensor nodes monitor the collected data to transmit along to other sensor nodes by hopping. During the process of transmission, monitored data may be handled by multiple nodes to get to gateway node after multihop routing, and fi nally reach the management node through the internet or satellite. It is the user who confi gures and manages the WSN with the management node, publish monitoring missions and collection of the monitored data. As related technologies mature, the cost of WSN equipment has dropped dramatically, and their applications are gradually expanding from the military areas to industrial and commercial fi elds. Meanwhile, standards for WSN technology have been well developed, such as Zigbee®1,


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