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Optimal Scheduling and Power Allocation in Cooperate-to-Join Cognitive Radio Networks

Karaca, Mehmet LU ; Khalil, Karim; Ekici, Eylem and Ercetin, Ozgur (2013) In IEEE/ACM Transactions on Networking 21(6). p.1708-1721
Abstract
In this paper, optimal resource allocation policies are characterized for wireless cognitive networks under the spectrum leasing model. We propose cooperative schemes in which secondary users share the time-slot with primary users in return for cooperation. Cooperation is feasible only if the primary system's performance is improved over the non-cooperative case. First, we investigate a scheduling problem where secondary users are interested in immediate rewards. Here, we consider both infinite and finite backlog cases. Then, we formulate another problem where the secondary users are guaranteed a portion of the primary utility, on a long-term basis, in return for cooperation. Finally, we present a power allocation problem where the goal is... (More)
In this paper, optimal resource allocation policies are characterized for wireless cognitive networks under the spectrum leasing model. We propose cooperative schemes in which secondary users share the time-slot with primary users in return for cooperation. Cooperation is feasible only if the primary system's performance is improved over the non-cooperative case. First, we investigate a scheduling problem where secondary users are interested in immediate rewards. Here, we consider both infinite and finite backlog cases. Then, we formulate another problem where the secondary users are guaranteed a portion of the primary utility, on a long-term basis, in return for cooperation. Finally, we present a power allocation problem where the goal is to maximize the expected net benefit defined as utility minus cost of energy. Our proposed scheduling policies are shown to outperform non-cooperative scheduling policies, in terms of expected utility and net benefit, for a given set of feasible constraints. Based on Lyapunov optimization techniques, we show that our schemes are arbitrarily close to the optimal performance at the price of reduced convergence rate. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE/ACM Transactions on Networking
volume
21
issue
6
pages
1708 - 1721
publisher
Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:84891633558
ISSN
1063-6692
DOI
10.1109/TNET.2012.2230187
language
English
LU publication?
no
id
b9eaddd7-d950-4bc8-a95f-264b5c6a9d83
date added to LUP
2016-05-12 12:28:33
date last changed
2016-12-04 04:51:31
@misc{b9eaddd7-d950-4bc8-a95f-264b5c6a9d83,
  abstract     = {In this paper, optimal resource allocation policies are characterized for wireless cognitive networks under the spectrum leasing model. We propose cooperative schemes in which secondary users share the time-slot with primary users in return for cooperation. Cooperation is feasible only if the primary system's performance is improved over the non-cooperative case. First, we investigate a scheduling problem where secondary users are interested in immediate rewards. Here, we consider both infinite and finite backlog cases. Then, we formulate another problem where the secondary users are guaranteed a portion of the primary utility, on a long-term basis, in return for cooperation. Finally, we present a power allocation problem where the goal is to maximize the expected net benefit defined as utility minus cost of energy. Our proposed scheduling policies are shown to outperform non-cooperative scheduling policies, in terms of expected utility and net benefit, for a given set of feasible constraints. Based on Lyapunov optimization techniques, we show that our schemes are arbitrarily close to the optimal performance at the price of reduced convergence rate.},
  author       = {Karaca, Mehmet and Khalil, Karim and Ekici, Eylem and Ercetin, Ozgur},
  issn         = {1063-6692},
  language     = {eng},
  number       = {6},
  pages        = {1708--1721},
  publisher    = {ARRAY(0x8674f08)},
  series       = {IEEE/ACM Transactions on Networking},
  title        = {Optimal Scheduling and Power Allocation in Cooperate-to-Join Cognitive Radio Networks},
  url          = {http://dx.doi.org/10.1109/TNET.2012.2230187 },
  volume       = {21},
  year         = {2013},
}