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The scope of wireless ad hoc networks continues to expand, and now includes not just sensor networks but sensor and actuator networks. Two articles in this issue consider wireless networks that include both sensors and actuators, while the third considers the issue of energy-efficient transmission in wearable body Area networks, or WBANs.
A sensor, actuator, and device network (SADN) is composed of sensor, actuator, and device nodes. Sensor nodes sense physical events and send sensed values of the events to actuator nodes. Actuator nodes decide on proper actions on receipt of sensed values and then issue requests of the actions to the device nodes. We propose an SADN model where sensor, actuator, and device functions are replicated...
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