数字传感网络的高速数据传输协议设计
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摘要
针对大型有线数字传感网络的数据传输要求和特性,提出一种适合网络节点大跨距条件的低功耗高速数据传输协议,阐述了在物理层采用以太网PHY芯片,实现数据实时高速可靠传输的设计新思路,介绍了协议跨层精简设计的技术,对该协议的实时性能进行了分析,并讨论了选择恰当的数据帧长来提高数据输送效率的方法.实验表明:节点间220 m大跨距时,该协议下通过双绞线,全网数据速率可达40 Mbps,能满足大型有线数字传感网络的高速实时应用需求。
In view of the requirements and features of data transmission in a large-scale wired digital sensor network, a low power High-speed Data Transmission Protocol(HDTP) is proposed,which is suitable for long node span.The paper gives a new design for real-time,high-speed and reliable data transmission using Ethernet PHY chips in the physical layer,and describes the techniques of cross-layer protocol design.Also the paper analyzes the real-time performance of HDTP and the way of improving the efficiency of data transmission through selecting appropriate data frame length.Experiment results show that the data rate of HDTP can reach up to 40 Mbps using unshielded twisted pair,which meets the real-time requirements of large-scale wired digital sensor network with long node span.
In view of the requirements and features of data transmission in a large-scale wired digital sensor network, a low power High-speed Data Transmission Protocol(HDTP) is proposed,which is suitable for long node span.The paper gives a new design for real-time,high-speed and reliable data transmission using Ethernet PHY chips in the physical layer,and describes the techniques of cross-layer protocol design.Also the paper analyzes the real-time performance of HDTP and the way of improving the efficiency of data transmission through selecting appropriate data frame length.Experiment results show that the data rate of HDTP can reach up to 40 Mbps using unshielded twisted pair,which meets the real-time requirements of large-scale wired digital sensor network with long node span.
引文
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[2]STANKOVIC J A.Wireless sensor networks[J].IEEE Computer,2008,41(10):92-95.
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[5]ISHIKAWA K I,MITA A.Time synchronization of a wired sensor network for structural health monitoring[J].IOP Publishing Smart Mater.Struct.,2008,doi:10.1088/ 0964-1726/17/01/015016.
[6]SHARMA G,MAZUMDAR R R.A case for hybrid sensor networks[J].IEEE/ACM NETWORKING,2008,16 (5):1121-1132.
[7]史铁林,刘世元.互换性传感器网络与动态可重构应用开发[J].仪器仪表学报,2009,30(11):2330-2335. SHI T L,LIU SH Y.On interchangeable sensor networks and its dynamic reconfigurable application development [J].Chinese Journal of Scientific Instrument.2009,30 (11 ):2330-2335.
[8]ALI M,SULEMAN T,UZMI Z A.MMAC:a mobility-adaptive collision-free MAC protocol for wireless sensor networks[J].IEEE Performance Computing and Communications Conference,2005:401-407.
[9]冯时雨,王轶辰.实时网络通信协议的设计与实现[J].计算机工程与设计.2008,29(17):4441-4443. FENG SH Y,WANG Y CH.Research on communication of distributed simulation testing environment[J].Computer Engineering and Design,2008,29(17):4441-4443.
[10]WANG B,WU J,ZHANG J.The design and implementation of custom protocol testing module based on ARM [C].Proceedings of ICEMI 2009,Ⅰ:882-885.
[11]International Organization for Standardization.Open Sys- terns Interconnection-Basic Reference Model:The Basic Model[s].International Standard ISO/IEC 7498 = 1: 1994(E).
[12]谢明璞.大规模陆上地震仪器结构设计[D].合肥:中国科学技术大学,2009:25-26. XIE M P.Key technologies of large scale seismic survey system design[D].Univ.of Sci.& Tech.of China, 2009:25-26.
[13]IEEE Computer Society.“IEEE std.802.3TM-2005”[C].SECTION TWO,2005:9-59.
[14]VON GORDON A F J,HANCKE G P.Protocol conversion for real-time energy management systems[C].Factory Communication Systems,IEEE International Workshop Proceedings,2004:319-322.
[15]武杰,韩晓泉,王兵.基于FPGA的嵌入式以太网帧流量测试仪的实现[J].仪器仪表学报,2009,30(6sup): 331-334. WU J,HAN X Q,WANG B.The implementation of an embedded ethernet frame network traffic instrument based on FPGA[J].Chinese Journal of Scientific Instrument. 2009,30(6sup):331-334.
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