Garis besar topik

  • BASIC WIRELESS SENSOR TECHNOLOGY

    In this chapter we look at basic sensor node systems technology at several levels. First, we focus on the sensor node technology itself (Section 3.2), providing a survey of sensor technology, including a taxonomy that classifies devices in families, such as large sensors (e.g., radar sensors), microsensors (tiny sensors), nanosensors, tag-reading sensors, and other sensors (Section 3.3). As already noted, WSNs are characterized by the fact that they need to operate in resource-constrained environments; in turn, this fact imposes strict design guidelines and limitations on the WNs; to this end, we address sensor functionality and components, including the sensing and actuation unit, processing unit, communication unit, power unit, and other application-dependent units. Second, we look at fundamental networking and topological issues (Section 3.4). Building on the introduction provided herein, these issues are revisited in more detail in subsequent chapters. Finally, we look at some current research trends in sensor technology.