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 A Multievent Congestion Control Protocol for Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 803271 12 pages doi 2008 803271 Research Article A Multievent Congestion Control Protocol for Wireless Sensor Networks Faisal B. Hussain 1 Yalcin Cebi 1 and Ghalib A. Shah2 1 Department of Computer Engineering Dokuz Eylul University 35100 Izmir Turkey 2 Department of Computer Engineering College of Electrical and Mechanical Engineering National University of Sciences and Technology NUST Rawalpindi 46000 Pakistan Correspondence should be addressed to Ghalib A. Shah ghalib@ Received 8 February 2008 Revised 29 October 2008 Accepted 7 December 2008 Recommended by Abraham Fapojuwo Wireless sensor networks are application-dependent networks. An application may require general event region information pernode event region information or prioritized event information in case of multiple events. All event flows are subject to congestion in wireless sensor networks. This is due to the sudden impulse of information flow from a number of event nodes to a single destination. Congestion degrades system throughput and results in energy loss of nodes. In this paper we present a multievent congestion control protocol MCCP for wireless sensor networks. MCCP supports multiple event reporting modes that is general event reporting per-node fair event reporting and prioritized multiple event reporting. MCCP efficiently mitigates congestion and provides output according to selected event reporting mode. MCCP uses hop-by-hop packet delivery time and buffer size as the basic metrics for congestion detection. Moreover we introduce a schedule-based scheme at the transport layer for rate assignment and ordered delivery of event packets to underlying routing layer. This helps to avoid packet collisions and increases the packet delivery ratio even in high densities. Detailed simulation analysis confirms that MCCP decreases packet drops and provides high packet .
