tailieunhanh - Báo cáo hóa học: "Research Article Efficient Scheduling of Pigeons for a Constrained Delay Tolerant Application"

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 Efficient Scheduling of Pigeons for a Constrained Delay Tolerant Application | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 142921 7 pages doi 2010 142921 Research Article Efficient Scheduling of Pigeons for a Constrained Delay Tolerant Application Jiazhen Zhou Jiang Li and Legand Burge Department of Systems and Computer Science Howard University Washington DC 20059 USA Correspondence should be addressed to Jiazhen Zhou zhouj@ Received 2 September 2009 Accepted 10 September 2009 Academic Editor Benyuan Liu Copyright 2010 Jiazhen Zhou 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. Information collection in the disaster area is an important application of pigeon networks a special type of delay tolerant networks DTNs that borrows the ancient idea of using pigeons as the telecommunication method. The aim of this paper is to explore highly efficient scheduling strategies of pigeons for such applications. The upper bound of traffic that can be supported under the deadline constraints for the basic on-demand strategy is given through the analysis. Based on the analysis a waitingbased packing strategy is introduced. Although the latter strategy could not change the maximum traffic rate that a pigeon can support it improves the efficiency of a pigeon largely. The analytical results are verified by the simulations. 1. Introduction After disasters . earthquakes fires tornadoes happen it is urgent to rescue people and protect property. To ensure the rescuing work timely and correctly executed accurate live information . in the format of videos is needed by the commanding headquarter. As the instant communications of large amount of message is usually unrealistic especially after the disasters which probably destroy the communication infrastructure a feasible solution is to send special .