Affiliation:
1. Nanyang Technological University
2. National Tsing Hua University
3. University of Illinois at Urbana-Champaign
4. Singapore University of Technology and Design
5. SK Telecom, Seoul, Korea
Abstract
Fine-grained real-time metering is a fundamental service of wireless energy auditing networks, where metering data is transmitted from embedded wireless power meters to gateways for centralized processing, storage, and forwarding. Due to limited meter capability and wireless bandwidth, the increasing sampling rates and network scales needed to support new energy auditing applications pose significant challenges to metering data
fidelity
and
secrecy
. This article exploits the
compression
and
encryption
properties of compressive sensing (CS) to design a jo<underline>i</underline>nt data <underline>c</underline>ompression and <underline>e</underline>ncryption (JICE) approach that addresses these two challenges simultaneously. Compared with a conventional signal processing pipeline that compresses and encrypts data sequentially, JICE reduces computation and space complexities due to its simple design. It thus leaves more processor time and available buffer space for handling lossy wireless transmissions. Moreover, JICE features an adaptive reconfiguration mechanism that selects the signal representation basis of CS at runtime among several candidate bases to achieve the best fidelity of the recovered data at the gateways. This mechanism enables JICE to adapt to changing power consumption patterns. On a smart plug platform, we implemented JICE and several baseline approaches including downsampling, lossless compression, and the pipeline approach. Extensive testbed experiments show that JICE achieves higher data delivery ratios and lower recovery distortions under a range of realistic settings. In particular, at a meter sampling rate of 8 Hz, JICE increases the number of meters supported by a gateway by 50%, compared with the commonly used pipeline approach, while keeping a signal distortion rate lower than 5%.
Publisher
Association for Computing Machinery (ACM)
Subject
Computer Networks and Communications
Reference50 articles.
1. Compressive wireless sensing
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3. BBC. 2013. Smart Meter Project Is Delayed. Retrieved from http://www.bbc.com/news/business-22480068. BBC. 2013. Smart Meter Project Is Delayed. Retrieved from http://www.bbc.com/news/business-22480068.
Cited by
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