Controlled spectrum sensing and scheduling under resource constraints

Nicolò Michelusi, Urbashi Mitra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In this paper, a cross-layer framework to perform spectrum sensing and scheduling in agile wireless networks under resource constraints is presented. A network of secondary users (SUs) opportunistically accesses portions of the spectrum left unused by a network of licensed primary users (PUs). A central controller (CC) schedules the traffic of the SUs over the spectrum bands, based on distributed compressed spectrum sensing performed by the SUs. Both sensing and scheduling are controlled based on the current spectrum occupancy belief, with the goal to maximize the SU throughput, under constraints on the PU throughput degradation and the sensing-transmission cost incurred by the SUs. The high optimization complexity is reduced by proposing a partially myopic scheduling strategy, where the total traffic of the SUs is determined optimally via dynamic programming, whereas the allocation of the resulting total traffic across frequency bands is determined via a myopic maximization of the instantaneous trade-off between PU and SU throughputs, which can be solved efficiently using convex optimization tools. Structural results of the partially myopic scheduling strategy are proved. Simulation results demonstrate how the proposed framework allows to balance optimally the cost of acquisition of state information via distributed spectrum sensing and the cost of data transmission incurred by the SUs, while achieving the best trade-off between PU and SU throughput under the resource constraints available.

Original languageEnglish (US)
Title of host publication24th International Conference on Computer Communications and Networks, ICCCN 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479999644
DOIs
StatePublished - Oct 2 2015
Externally publishedYes
Event24th International Conference on Computer Communications and Networks, ICCCN 2015 - Las Vegas, United States
Duration: Aug 3 2015Aug 6 2015

Publication series

NameProceedings - International Conference on Computer Communications and Networks, ICCCN
Volume2015-October
ISSN (Print)1095-2055

Conference

Conference24th International Conference on Computer Communications and Networks, ICCCN 2015
CountryUnited States
CityLas Vegas
Period8/3/158/6/15

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

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