Over-the-air Function Computation in Sensor Networks

Abstract

Many sensor applications are interested in computing a function over measurements (e.g., sum, average, max) as opposed to collecting all sensor data. Today, such data aggregation is done in a cluster-head. Sensor nodes transmit their values sequentially to a cluster-head node, which calculates the aggregation function and forwards it to the base station. In contrast, this paper explores the possibility of computing a desired function over the air. We devise a solution that enables sensors to transmit coherently over the wireless medium so that the cluster-head directly receives the value of the desired function. We present analysis and preliminary results that demonstrate that such a design yield a large improvement in network throughput.

8 pages

References in corpus (2)

• AirSync: Enabling Distributed Multiuser MIMO with Full Spatial Multiplexing
• Computing linear functions by linear coding over networks

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• Computation Over NOMA: Improved Achievable Rate Through Sub-Function Superposition
• Robust Interference Management for SISO Systems with Multiple Over-the-Air Computations