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A Multi-channel Scheme for Fast Data Collection in Wireless Sensor Networks

Ghods, Fatemeh | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43333 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hemmatyar, Ali Mohammad Afshin
  7. Abstract:
  8. With the development of technology and growing interest in using high performance and low price products, Wireless Sensor Networks (WSNs) are being dramatically deployed as an emerging technology. The main concern in WSNs is energy consumption that has an effect on sensor’s life time. In order to minimize the energy consumption, Data aggregation, which obtains aggregated values from WSNs, is an important functionality but yet time consuming. On the other hands, Emerging applications of Wireless Sensor Networks (WSNs) such as real-time detection of events need high-rate data collection, which is now an important challenge in WSNs. Multi-channel communication is one of the efficient methods to overcome this challenge. Network throughput can be improved by enabling parallel transmissions over different frequency channels, which cause to alleviate interference and contention on the wireless medium. In this Thesis we have proposed a new approach for frequency- channel and time-slot assignment in multi-channel WSNs. We have presented, data collection rate can be improved using combination of orthogonal channels and overlapped channels. Simulation results show overall time of data collection can be reduced by the same hardware, or the same overall time can be achieved by simpler hardware.
  9. Keywords:
  10. Channel Assignment Problem ; Wireless Sensor Network ; Time Assignment ; Orthogonal Channel ; Overlapping Channel

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