tailieunhanh - Báo cáo hóa học: "Research Article GRAdient Cost Establishment (GRACE) for an Energy-Aware Routing in Wireless Sensor Networks"

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 GRAdient Cost Establishment (GRACE) for an Energy-Aware Routing in Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 275694 15 pages doi 2009 275694 Research Article GRAdient Cost Establishment GRACE for an Energy-Aware Routing in Wireless Sensor Networks Noor M. Khan 1 Zubair Khalid 2 and Ghufran Ahmed1 1 Department of Electronic Engineering Mohammad Ali Jinnah University Islamabad 44000 Pakistan 2 Faculty of Electronic Engineering GIK Institute of Engineering Sciences and Technology Topi 23640 Pakistan Correspondence should be addressed to Ghufran Ahmed gahmad78@ Received 14 March 2009 Revised 27 September 2009 Accepted 8 October 2009 Recommended by Naveen Chilamkurti In Wireless Sensor Network WSN the nodes have limitations in terms of energy-constraint unreliable links and frequent topology change. In this paper we propose an energy-aware routing protocol that outperforms the existing ones with an enhanced network lifetime and more reliable data delivery. Major issues in the design of a routing strategy in wireless sensor networks are to make efficient use of energy and to increase reliability in data delivery. The proposed approach reduces both energy consumption and communication-bandwidth requirements and prolongs the lifetime of the wireless sensor network. Using both analysis and extensive simulations we show that the proposed dynamic routing helps achieve the desired system performance under dynamically changing network conditions. The proposed algorithm is compared with one of the best existing routing algorithms GRAB. Moreover a modification in GRAB is proposed which not only improves its performance but also prolongs its lifetime. Copyright 2009 Noor M. Khan 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. 1. Introduction . Overview. Advances in sensor technology .