Sensor Network
A sensor network is composed of a large number of sensor nodes that are densely deployed either inside the phenomenon or very close to it. The position of sensor nodes need not be engineered or predetermined. This allows random deployment in inaccessible terrains or disaster relief operations. On the other hand, this also means that sensor network protocols and algorithms must possess self-organizing capabilities. Another unique feature of sensor networks is the cooperative effort of sensor nodes. Sensor nodes are fitted with an onboard processor. Instead of sending the raw data to the nodes responsible for the fusion, they use their processing abilities to locally carry out simple computations and transmit only the required and partially processed data。
传感器网络由大量的传感器组成，传感器节点部署的位置可以不受距离的限制。
Two types of sensor network
- 分布式节点被部署仅用于数据的采集，例如交通监测。
2. 分布式节点不仅可以采集数据，还能对数据进行处理和储存。从图中可以看出，节点向数据中心传送处理后的数据而不是原始数据。
A Survey on Sensor Networks
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1024422
Data-intensive System sildes from University of St Andrews
