Loading...

QoS-aware joint policies in cognitive radio networks

Salehkaleybar, S ; Sharif University of Technology | 2011

744 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/IWCMC.2011.5982774
  3. Publisher: 2011
  4. Abstract:
  5. One of the most challenging problems in Opportunistic Spectrum Access (OSA) is to design channel sensing-based protocol in multi secondary users (SUs) network. Quality of Service (QoS) requirements for SUs have significant implications on this protocol design. In this paper, we propose a new method to find joint policies for SUs which not only tries to guarantee QoS requirements but also maximize network throughput. We use Decentralized Partially Observable Markov Decision Process (Dec-POMDP) to formulate interactions between SUs. Meanwhile, a tractable approach for Dec-POMDP is utilized to extract sub-optimum joint policies for large horizons. Among these policies, the QoS-aware joint policy is selected as the joint sensing strategy for SUs. To show the efficiency of the proposed method, we consider two SUs trying to access two-channel primary users (PUs) network modeled by discrete Markov chains. Simulations demonstrate two interesting findings: 1- Optimum joint policies for large horizons can be obtained using the proposed method. 2- Our method outperforms other related works in terms of network throughput
  6. Keywords:
  7. Decentralized Partially Observable Markov Decision Process (Dec-POMDP) ; Dynamic Programming (DP) ; Opportunistic Spectrum Access (OSA) ; Quality of Service (QoS) ; Cognitive radio network ; Network throughput ; Partially observable Markov decision process ; Protocol design ; QoS requirements ; Two-channel ; Markov processes ; Mobile computing ; Quality control ; Spectroscopy ; Wireless telecommunication systems
  8. Source: IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference, 4 July 2011 through 8 July 2011 ; July , 2011 , Pages 2220-2225 ; 9781424495399 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5982774