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Multipath Routing in Cognitive Radio Networks

Rezaei, Shahbaz | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44755 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hemmatyar, Ali Mohammad Afshin
  7. Abstract:
  8. Cognitive Radio (CR) technology enables dynamic spectrum access (DSA) to overcome the problems of unlicensed bands which is becoming overcrowded. However, providing an acceptable quality of service (QoS) for cognitive users requiresmore sophisticated approachesdut to the existence of primary users (PU) with their high priority over licensed bands. Additionally, reducing interference with primary users so that they can communicate without interruption is of extreme importance. In order to meet cognitive user’s quality of service as much as possible and reduce interference with PUs, a new class-based multipath on-demand routing protocol for cognitive radio networks (CMORC) is proposed. CMORC is a multipath routing protocol which defines two class of routing to make delay and interference optimum, respectively. CMORC finds optimum sending rates for each path by solving an optimization problem for each routing class. It is proved to be easy to solve these optimization problems that it makes CMORC an efficient and feasible solution for radio equipment with limited computation capacity. The simulation results reveal that the proposed protocol outperforms the other existing multipath routing protocol in terms of interference, delay, and packet delivery ratio depending on the class type
  9. Keywords:
  10. Cognitive Radio ; Optimization ; Multipath Routing ; Routing

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