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: BOB-RED queue management for IEEE wireless sensor networks | Lin et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 107 http content 2011 1 107 o EURASIP Journal on Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access BOB-RED queue management for IEEE wireless sensor networks Mu-Sheng Lin1 Jenq-Shiou Leu1 Wen-Chi Yu1 Min-Chieh Yu1 and Jean-Lien C Wu2 Abstract Multimedia services over resource constrained wireless sensor networks WSNs face a performance bottleneck issue from the gateway node to the sink node. Therefore the queue management at the gateway node is crucial for diversified messages conveyed from the front nodes to the sink node. In this article beacon order-based random early detection BOB-RED queue management is proposed. BOB-RED is a dynamic adaptation scheme based on adjusting beacon interval and superframe duration in the IEEE MAC superframe accompanied with RED queue management scheme to increase the transmission efficiency of multimedia over WSNs. We focus on the performance improvement upon different traffic loads over WSNs. Evaluation metrics include end-to-end delay packet delivery ratio and energy consumption in IEEE beacon enabled mode. Simulation results show that BOB-RED can effectively decrease end-to-end delay and energy consumption compared to the DropTail scheme. Keywords wireless sensor networks WSNs IEEE superframe beacon-enabled beacon order BO superframe order SO queue management DropTail random early detection RED 1. Introduction IEEE standard 1 defines the protocol and interconnection of devices via radio communication in a wireless personal area network WPAN . The standard uses CSMA CA medium access mechanism and supports star as well as peer-to-peer topologies. It provides applications such as home entertainment and control security alarms industrial monitoring and control personal mobile healthcare and tele-assist etc. Two types of device called the full function .
