To Compress or Not to Compress: Processing Vs Transmission Tradeoffs for Energy Constrained Sensor Networking

Date Added: Jun 2012
Format: PDF

In the past few years, lossy compression has been widely applied in the field of Wireless Sensor Networks (WSN), where energy efficiency is a crucial concern due to the constrained nature of the transmission devices. Often, the common thinking among researchers and implementers is that compression is always a good choice, because the major source of energy consumption in a sensor node comes from the transmission of the data. Lossy compression is deemed a viable solution as the imperfect reconstruction of the signal is often acceptable in WSN, subject to some application dependent maximum error tolerance. Nevertheless, this is seldom supported by quantitative evidence.