Loading...

Efficient Multicasting in Cognitive Wireless Sensor Networks

Farzan Heydari, Mohammad | 2012

696 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43398 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Movaghar Rahimabadi, Ali
  7. Abstract:
  8. Today with growth of wireless communications and progress of small and cheap sensors which have capability of communication and calculation, wireless sensor networks are important and useful topic. But due to energy restrictions, efficient use of resources and increasing network lifetime, have been considered as key factors in network design. In this regard, using efficient multicast routing in energy consumption, for an efficient data transmission to specific number of nodes instead of all nodes code updates, information requests, task assignments and etc., is necessary.On the other hand these networks use unlicensed spectrum and suffer from collision due to congestion caused by other networks using similar unlicensed spectrum. For this purpose cognitive wireless sensor networks transfer data using licensed spectrum without paying high cost and avoiding collision due to the use of unlicensed spectrum. Also cognitive radio with change of system parameters can affect energy consumption and network lifetime. In this thesis, wireless sensor networks have been introduced briefly. Cognitive wireless sensor networks, different methods of data transfer and advantages and disadvantages of each have been discussed. In continue multicast routing in wireless sensor networks, challenges and solutions are discussed. Finally we propose two novel protocols for multicast routing in cognitive wireless sensor networks. The first protocol uses cognitive radio features and tries to decrease energy consumption and minimize end to end delay. The second proposed protocol with round the area which primary users are active, trying to find the path with minimum energy consumption. Simulation results shows improvement of performance measures such as energy consumption.
  9. Keywords:
  10. Cognitive Radio ; Wireless Sensor Network ; Routing ; Multicast

 Digital Object List

 Bookmark

No TOC