NDLI: A cross-layer framework for joint control and distributed sensing in agile wireless networks

Content Provider	IEEE Xplore Digital Library
Author	Michelusi, N. Mitra, U.
Copyright Year	2014
Description	Author affiliation: Ming Hsieh Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA (Michelusi, N.; Mitra, U.)
Abstract	In this paper, a cross-layer framework for joint control and distributed sensing in agile wireless networks is presented, where an agent schedules actions to control a partially observable Markov decision process, whose state is inferred by collecting measurements from nearby assistant wireless nodes with cognitive and sensing capabilities (ANs). The framework makes it possible to model practical constraints of wireless networks, such as the cost incurred by the ANs to sense and transmit to the agent and the shared wireless channel, as well as to jointly optimize the acquisition of state information at the agent via distributed sensing, and the scheduling policy, under sensing-transmission cost constraints for the ANs. The optimality of a two-stage decomposition is proved, which enables decoupling of the optimization of action scheduling and distributed sensing. This scheme is applied to spectrum sensing, where the activity of licensed (PU, primary) users is measured by distributed wireless assisting receivers, based on which an agile (SU, secondary) user adapts its transmissions over time. Simulation results demonstrate that the proposed adaptive joint sensing-scheduling policy improves the SU throughput up to 50% over a scheme employing non-adaptive sensing, for a given constraint on the throughput degradation to the PU pair and cost incurred by the ANs, and up to a three-fold increase over a scheme where sensing is performed only locally by the SU.
Starting Page	1747
Ending Page	1751
File Size	504042
Page Count	5
File Format	PDF
ISBN	9781479951864
ISSN	21578117
DOI	10.1109/ISIT.2014.6875133
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensors Optimization Joints Wireless sensor networks Wireless communication Throughput Digital signal processing
Content Type	Text
Resource Type	Article

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