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面向工厂自动化无线网络的时间同步方法
Time Synchronization Method of Wireless Network for Factory Automation
查看参考文献13篇
文摘
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时间同步技术是保障工厂自动化无线网络高实时性与高可靠性的支撑技术.工厂自动化无线网络技术指标要求时间同步的精度成为同步方法的重心,在商用的IEEE 802.11硬件平台上,设计并实现了基于时分多址(time division multiple access, TDMA)机制并由时钟偏差测量、时钟偏差预测和时钟漂移补偿3部分算法组成的高精度时间同步方法.实验证明由于该同步算法相对于传统的双向同步算法加入了时钟偏差预测与补偿机制,使其有精度高、可靠性高、自适应性强等优势,有助于实现工厂自动化无线网络微秒级的TDMA时隙调度. |
其他语种文摘
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As one of the key technologies in wireless networks, time synchronization is the supporting technology of factory automation wireless network that guarantees high reliability and high real-time. The high rate and simply effective topology of IEEE 802.11 make it become the best protocol for wireless network of factory automation. This paper first analyzes the importance of clock synchronization precision for high reliability and high real-time in factory automation and proves that high time synchronization precision is the important goal for wireless network in factory automation. Then it designs and realizes the high precision time synchronization method of wireless network for factory automation based on TDMA mechanism on commercial IEEE 802.11 hardware. The high-precision time synchronization method includes three algorithms that are clock skew measurement, clock skew prediction, and clock skew compensation, which are interlocked in one cycle of superframe of TDMA mechanism for high precision of time synchronization. Experiments show that through measurement, prediction and compensation, the time synchronization precision is improved obviously relative to the traditional two-way time synchronization algorithm. The high reliability and strong adaptability of this method adapt to the factory environment, and the high precision of time synchronization is helpful to realize the TDMA timeslot schedule in microsecond of wireless network for factory automation. |
来源
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计算机研究与发展
,2014,51(3):511-518 【核心库】
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DOI
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10.7544/issn1000-1239.2014.20120621
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关键词
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工厂自动化
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无线网络
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时间同步
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802.11
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时分多址
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双向同步
;
预测补偿
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地址
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中国科学院沈阳自动化研究所, 沈阳, 110016
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1000-1239 |
学科
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自动化技术、计算机技术 |
基金
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国家自然科学基金项目
;
国家863计划
;
国家973计划
;
中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:5080987
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参考文献 共
13
共1页
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1.
De Pellegrini F. On the use of wireless networks at low level of factory automation systems.
IEEE Trans on Indμstrial Informatics,2006,2(2):129-143
|
被引
1
次
|
|
|
|
2.
林俊如. 面向高速工业无线网络的TDMA MAC协议设计与实现.
计算机科学,2011,38(10A):299-304
|
被引
2
次
|
|
|
|
3.
Elson J. Fine-grained network time synchronization using reference broadcasts.
Proc of the 5th Symp on Operating System Design and Implementation,2002:147-163
|
被引
1
次
|
|
|
|
4.
Ping S.
Delay measurement time synchronization for wireless sensor networks,2012
|
被引
1
次
|
|
|
|
5.
Maroti M. The flooding time synchronization protocol.
Proc of the 2nd Int ACM Conf on Embedded Networked Sensor Systems,2004:39-49
|
被引
1
次
|
|
|
|
6.
Ganeriwal S. Timing-sync protocol for sensor networks.
Proc of the 1st Int ACM Conf on Embedded Networked Sensor Systems,2003:138-149
|
被引
1
次
|
|
|
|
7.
Sichitiu M. Simple, accurate time synchronization for wireless sensor networks.
Proc of WCNC 2003,2003:1266-1273
|
被引
1
次
|
|
|
|
8.
Dirk S.
1588-2002 IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems,2002
|
被引
1
次
|
|
|
|
9.
Kannisto J. Software and hardware prototypes of the IEEE 1588 precision time protocol on wireless LAN.
Local and Metropolitan Area Networks,2005,42(1):174-183
|
被引
1
次
|
|
|
|
10.
Mahmood A. Software support for clock synchronization over IEEE 802.11 wireless LAN with open source drivers.
Proc of 2010 Int IEEE Symp on Precision Clock Synchronization for Measurement, Control and Communications (ISPCS 2010),2010:61-66
|
被引
1
次
|
|
|
|
11.
Mahmood A. Timestamping for IEEE1588 based clock synchronization in wireless LAN.
Proc of 2009 IEEE Int Symp on Precision Clock Synchronization for Measurement, Control and Communications (ISPCS 2009),2009:1-6
|
被引
1
次
|
|
|
|
12.
Atheros Communications Inc.
AR5213 MAC/baseband processor,2012
|
被引
1
次
|
|
|
|
13.
.
Ath5k.The madwifi project,2012
|
被引
1
次
|
|
|
|
|
|