Distributed Congestion Mitigation and Medium Access in Duty Cycling Wireless Sensor Networks

作     者：Liu, Hao Liu, Ye 

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.