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 Mobile Agent-Based Directed Diffusion in Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 36871 13 pages doi 2007 36871 Research Article Mobile Agent-Based Directed Diffusion in Wireless Sensor Networks Min Chen 1 Taekyoung Kwon 2 Yong Yuan 3 Yanghee Choi 2 and Victor C. M. Leung1 1 Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada V6T1Z4 2 School of Computer Science and Engineering Seoul National University Seoul 151-744 South Korea 3 Department of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan 430074 China Received 29 November 2005 Revised 12 May 2006 Accepted 16 July 2006 Recommended by Deepa Kundur In the environments where the source nodes are close to one another and generate a lot of sensory data traffic with redundancy transmitting all sensory data by individual nodes not only wastes the scarce wireless bandwidth but also consumes a lot of battery energy. Instead of each source node sending sensory data to its sink for aggregation the so-called client server computing Qi et al. in 2003 proposed a mobile agent MA -based distributed sensor network MADSN for collaborative signal and information processing which considerably reduces the sensory data traffic and query latency as well. However MADSN is based on the assumption that the operation of mobile agent is only carried out within one hop in a clustering-based architecture. This paper considers MA in multihop environments and adopts directed diffusion DD to dispatch MA. The gradient in DD gives a hint to efficiently forward the MA among target sensors. The mobile agent paradigm in combination with the DD framework is dubbed mobile agent-based directed diffusion MADD . With appropriate parameters set extensive simulation shows that MADD exhibits better performance than original DD in the client server paradigm in terms of packet delivery ratio energy consumption and end-to-end delivery .
