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 HUMS: An Autonomous Moving Strategy for Mobile Sinks in Data-Gathering Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 64574 15 pages doi 2007 64574 Research Article HUMS An Autonomous Moving Strategy for Mobile Sinks in Data-Gathering Sensor Networks Yanzhong Bi 1 2 Limin Sun 1 Jian Ma 3 Na Li 4 Imran Ali Khan 4 and Canfeng Chen3 1 Institute of Software Chinese Academy of Sciences Beijing 100080 China 2 Graduate School of Chinese Academy of Sciences Beijing 100039 China 3 Nokia Research Center Beijing 100013 China 4 Computer Network Information Center Chinese Academy of Sciences Beijing 100080 China Received 30 September 2006 Accepted 13 March 2007 Recommended by Lionel M. Ni Sink mobility has attracted much research interest in recent years because it can improve network performance such as energy efficiency and throughput. An energy-unconscious moving strategy is potentially harmful to the balance of the energy consumption among sensor nodes so as to aggravate the hotspot problem of sensor networks. In this paper we propose an autonomous moving strategy for the mobile sinks in data-gathering applications. In our solution a mobile sink approaches the nodes with high residual energy to force them to forward data for other nodes and tries to avoid passing by the nodes with low energy. We performed simulation experiments to compare our solution with other three data-gathering schemes. The simulation results show that our strategy cannot only extend network lifetime notably but also provides scalability and topology adaptability. Copyright 2007 Yanzhong Bi 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 Wireless sensor networks composed of networked sensors and mobile sinks have the potentiality of providing diverse services to numerous applications such as surveillance systems and .
