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Throughput analysis of a cognitive multi-hop IEEE 802.11-based WLAN overlaid on a cellular network

Soleimani, H ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. Publisher: 2011
  3. Abstract:
  4. In this paper, we focus on a cognitive network scenario, comprised of a multi-hop IEEE 802.11-based WLAN overlaid on a cellular network. In this scenario, the wireless nodes in a WLAN, i.e., cognitive nodes, use the downlink frequency channels of the cellular network opportunistically, such that at each packet transmission all idle channels have been exploited. In order to evaluate the capability of the considered cognitive network scenario, we propose an open queueing network model such that different packet transmission phases are mapped onto different queueing nodes. We also map different types of collisions, i.e., collision on control signals as well as collision on data transmission due to hidden terminals and the activation of primary users, onto suitable parameters of the queueing network. By writing the corresponding traffic equations and applying the stability conditions, we derive the maximum stable throughput, i.e., the maximum packet generation rate at cognitive nodes such that all queues are stable. Finally, we show the applicability of our analytical model in different situations and confirm our model by simulations
  5. Keywords:
  6. Analytical model ; Cellular network ; Cognitive network ; Control signal ; Downlink frequency ; Generation rate ; Hidden terminal ; Idle channel ; IEEE 802.11s ; Maximum stable throughput ; Multihop ; Open queueing networks ; Packet transmissions ; Stability condition ; Throughput analysis ; Wireless nodes ; Cellular neural networks ; Computer simulation ; Mathematical models ; Packet networks ; Queueing theory ; Standards ; Queueing networks
  7. Source: 2011 International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2011, 15 September 2011 through 17 September 2011, Split, Hvar, Dubrovnik ; 2011 , Pages 307-311 ; 9789532900262 (ISBN)
  8. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6064441&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6064441