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Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data

Publication ,  Journal Article
Mahzoon, M; Li, C; Li, X; Grover, P
Published in: IEEE Journal on Selected Areas in Communications
May 1, 2016

We consider the problem of communicating data from energy-constrained distributed sensors. To reduce energy requirements, we go beyond the source reconstruction problem classically addressed, and focus on the problem where the recipient wants to perform supervised learning and classification on the data received from the sensors. Restricting our attention to a noiseless communication setting under simplistic Gaussian source assumptions, we study supervised learning and classification under total energy limitations. The energy constraints are modeled in two ways: 1) a linear scaling and 2) an exponential scaling of energy with number of bits used for compression at sensors. We first assume that the underlying parameters for Gaussian distributions have already been learned, and obtain (with linear scaling, reverse-waterfilling-type) strategies for allocating energy, and thus, bits, across different sensors under these two models. Intuitively, these strategies allocate larger rates and energies to sensors that are more 'relevant' for the classification goal. These strategies are used to obtain an achievable bound on the tradeoff between energy and error-probability (classification risk). We then provide an algorithm for learning the distribution-parameters of the sensor-data under energy constraints to arrive at high-reliability energy-allocation strategies, while enabling the energy-allocation algorithm to backtrack when the underlying distributions change, or when there is noise in sensed data that can push the algorithm toward a local minimum. Finally, we provide numerical results on energy-savings for classification of simulated data as well as neural data acquired from electrocorticography (ECoG) experiments.

Duke Scholars

Published In

IEEE Journal on Selected Areas in Communications

DOI

ISSN

0733-8716

Publication Date

May 1, 2016

Volume

34

Issue

5

Start / End Page

1417 / 1430

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0805 Distributed Computing
 

Citation

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Mahzoon, M., Li, C., Li, X., & Grover, P. (2016). Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data. IEEE Journal on Selected Areas in Communications, 34(5), 1417–1430. https://doi.org/10.1109/JSAC.2016.2545381
Mahzoon, M., C. Li, X. Li, and P. Grover. “Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data.” IEEE Journal on Selected Areas in Communications 34, no. 5 (May 1, 2016): 1417–30. https://doi.org/10.1109/JSAC.2016.2545381.
Mahzoon M, Li C, Li X, Grover P. Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data. IEEE Journal on Selected Areas in Communications. 2016 May 1;34(5):1417–30.
Mahzoon, M., et al. “Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data.” IEEE Journal on Selected Areas in Communications, vol. 34, no. 5, May 2016, pp. 1417–30. Scopus, doi:10.1109/JSAC.2016.2545381.
Mahzoon M, Li C, Li X, Grover P. Energy-constrained distributed learning and classification by exploiting relative relevance of sensors' data. IEEE Journal on Selected Areas in Communications. 2016 May 1;34(5):1417–1430.

Published In

IEEE Journal on Selected Areas in Communications

DOI

ISSN

0733-8716

Publication Date

May 1, 2016

Volume

34

Issue

5

Start / End Page

1417 / 1430

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0805 Distributed Computing