Dynamic link/frequency selection in multi-hop cognitive radio networks for delay sensitive applications

Jashni, B ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1109/ICTEL.2010.5478652
  3. Publisher: 2010
  4. Abstract:
  5. Regarding the dynamic nature of cognitive radio networks and the delay of the central decision algorithms due to collecting necessary information in a multi-hop wireless network, distributed resource allocation algorithms are of crucial importance. In this paper we propose a new distributed resource allocation algorithm that properly selects link/frequency in a multi-hop cognitive radio network for delay sensitive applications. This algorithm, uses the locally collected information from neighboring nodes to make suitable routing decisions regarding the dynamic environment and the behavior of the neighbors. We consider the delay as the routing criterion, consisting the queueing delay and the transmission delay. Based on the gathered information from neighboring nodes, we estimate the path delay of all available links and then select the appropriate link/frequency to send data. Simulation results illustrate that our proposed algorithm outperforms the previously published ones that consider only the transmission delay as the decision criterion
  6. Keywords:
  7. Dynamic link/frequency selection ; Cognitive radio ; Cognitive radio network ; Decision algorithms ; Decision criterions ; Delay sensitive application ; Distributed resource allocation ; Dynamic environments ; Dynamic nature ; Multihop ; Multihop wireless network ; Neighboring nodes ; Path delay ; Queueing delays ; Routing criteria ; Routing decisions ; Simulation result ; Transmission delays ; Algorithms ; Radio systems ; Resource allocation ; Wireless networks ; Radio
  8. Source: ICT 2010: 2010 17th International Conference on Telecommunications, 4 April 2010 through 7 April 2010 ; April , 2010 , Pages 128-132 ; 9781424452477 (ISBN)
  9. URL: http://ieeexplore.ieee.org/abstract/document/5478652