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内蒙古自治区呼和浩特市赛罕区大学西街235号 邮编: 010021
作者机构:Southeast Univ Natl ASIC Syst Engn Res Ctr Nanjing 210096 Jiangsu Peoples R China Southeast Univ Suzhou Key Lab Integrated Circuits & Syst Suzhou 215123 Peoples R China
出 版 物:《INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS》 (分布式传感网络国际杂志)
年 卷 期:2014年第000卷第8期
页 面:1-11页
核心收录:
学科分类:0810[工学-信息与通信工程] 08[工学] 0812[工学-计算机科学与技术(可授工学、理学学位)]
基 金:National Science Foundation of China Natural Science Foundation of Jiangsu [BK2011018] Graduate Research and Innovation Projects of Universities in Jiangsu Province [KYLX 0130]
主 题:WIRELESS sensor networks -- Access control DISTRIBUTED network protocols DATA packets & packeting QUEUEING networks (Data transmission) WIRELESS sensor nodes
摘 要:Duty cycling is an efficient design approach to achieve energy efficiency in wireless sensor networks. However, it may aggravate congestion due to long access delay and amplified hidden/exposed terminal problems. This paper first investigates some key facts that impact congestion and deteriorate packet transmission. With above observations, we propose a queue length based contention window adjustment approach, which allows congested nodes having high priority to access the channel. Then, a batch transmission scheme is introduced to drain accumulated packets rapidly. Finally, a random preamble mechanism is designed, so that congested nodes have more chances to get channel when other transmission is happening. Through the experiments on TelosB nodes test-bed using TinyOS, evaluation results show that our proposed schemes can mitigate congestion efficiently and have better performance than traditional approaches.