Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Energy-Efficient Reservation-Based Medium Access Control Protocol for Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 878412 22 pages doi 2010 878412 Research Article Energy-Efficient Reservation-Based Medium Access Control Protocol for Wireless Sensor Networks Mikko Kohvakka Jukka Suhonen Timo D. Hamalainen and Marko Hannikainen Department of Computer Systems Tampere University of Technology 33720 Tampere Finland Correspondence should be addressed to Jukka Suhonen Received 13 April 2010 Accepted 16 August 2010 Academic Editor Sudip Misra Copyright 2010 Mikko Kohvakka et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. In Wireless Sensor Networks WSNs a robust and energy-efficient Medium Access Control MAC protocol is required for high energy efficiency in harsh operating conditions where node and link failures are common. This paper presents the design of a novel MAC protocol for low-power WSNs. The developed MAC protocol minimizes the energy overhead of idle time and collisions by strict frame synchronization and slot reservation. It combines a dynamic bandwidth adjustment mechanism multicluster-tree network topology and a network channel allowing rapid and low-energy neighbor discoveries. The protocol achieves high scalability by employing frequency and time division between clusters. Performance analysis shows that the MAC protocol outperforms current state-of-the-art protocols in energy efficiency and the energy overhead compared to an ideal MAC protocol is only to . The high energy efficiency is achieved in both leaf and router nodes. The models and the feasibility of the protocol were verified by simulations and with a full-scale prototype implementation. 1. Introduction Wireless Sensor Network WSN is an emerging technology which combines distributed sensing and
