2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication最新文献

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Wireless sensors exploiting IEEE802.15.4a for precise timestamping 无线传感器利用ieee802.15.a精确的时间戳
C. M. D. Dominicis, P. Ferrari, A. Flammini, E. Sisinni
{"title":"Wireless sensors exploiting IEEE802.15.4a for precise timestamping","authors":"C. M. D. Dominicis, P. Ferrari, A. Flammini, E. Sisinni","doi":"10.1109/ISPCS.2010.5609782","DOIUrl":"https://doi.org/10.1109/ISPCS.2010.5609782","url":null,"abstract":"This paper deals with the application of the Chirp Spread Spectrum (CSS) modulation for the synchronization of wireless sensors. Chirp modulation is a well known technique for precise localization, originally developed for RADAR applications. When CSS is used for communication purposes, radio frequency pulses are modulated in order to convey also user data. This approach allows for robustness, thanks to processing gain deriving from pulse compression, and for high accuracy estimation of the Time of Arrival of frames. In this paper, the CSS properties have been exploited in order to arrange a robust timestamping mechanism for distributed wireless sensor networks. The proposed system is based on the CSS modulation of the IEEE802.15.4a. Since commercial transceivers do not have synchronization support, the paper is based on a CSS modulation module implemented using a software defined radio approach. The outcome is a highly flexible solution that offers the desired synchronization support, confirmed by the simulation results showing a packet timestamping capability well below one nanosecond.","PeriodicalId":254081,"journal":{"name":"2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121748361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
IEEE 1588 for time synchronization of devices in the electric power industry IEEE 1588用于电力工业设备的时间同步
F. Steinhauser, C. Riesch, M. Rudigier
{"title":"IEEE 1588 for time synchronization of devices in the electric power industry","authors":"F. Steinhauser, C. Riesch, M. Rudigier","doi":"10.1109/ISPCS.2010.5609787","DOIUrl":"https://doi.org/10.1109/ISPCS.2010.5609787","url":null,"abstract":"There is an increasing demand on accurate time synchronization for protection and control equipment for the electrical power supply system. Today, with the proliferation of Ethernet networks in the substation automation systems, mainly driven by other standards as IEC 61850, time distribution over these networks appears to be especially appealing. NTP was already specified in IEC 61850 as time distribution mechanism, but this was only suitable for less demanding purposes. For the more challenging protection applications, IEEE 1588 seems to be the right choice. The experts in substation automation, protection, and control have already identified these issues and initiated coordinated action on this. The Power Systems Relaying Committee of the IEEE, in close coordination with the Technical Committee 57 of IEC, is currently working on a profile of PTP for Power System Applications (IEEE PC37.238).","PeriodicalId":254081,"journal":{"name":"2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124360751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 41
System integration of an IEEE 802.11 based TDoA localization system 基于IEEE 802.11的TDoA定位系统集成
Stefan Schwalowsky, H. Trsek, R. Exel, N. Kero
{"title":"System integration of an IEEE 802.11 based TDoA localization system","authors":"Stefan Schwalowsky, H. Trsek, R. Exel, N. Kero","doi":"10.1109/ISPCS.2010.5609762","DOIUrl":"https://doi.org/10.1109/ISPCS.2010.5609762","url":null,"abstract":"Network entities with synchronized clocks are an enabler for many interesting and innovative applications. Localization of mobile WLAN devices by means of propagation delay measurements and position calculation according to time difference of arrival (TDoA) method is one of the most interesting applications. Those localization techniques are favored over standard signal strength based methods when high accuracy positioning is desired. This paper presents a system that utilizes special synchronized receivers in conjunction with a central unit to locate WLAN devices. The system architecture is described in terms of the integration of all participating entities for both, hardware and software. 1","PeriodicalId":254081,"journal":{"name":"2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131212926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
A master redundancy technique in IEEE 1588 synchronization with a link congestion estimation 基于链路拥塞估计的ieee1588同步主冗余技术
T. Murakami, Y. Horiuchi
{"title":"A master redundancy technique in IEEE 1588 synchronization with a link congestion estimation","authors":"T. Murakami, Y. Horiuchi","doi":"10.1109/ISPCS.2010.5609780","DOIUrl":"https://doi.org/10.1109/ISPCS.2010.5609780","url":null,"abstract":"This paper presents a master redundancy technique for improving the availability of synchronization in IEEE 1588. We propose a novel best master clock (BMC) algorithm to take account of link congestion between master and slave nodes. To determine the priority of master nodes, a BMC algorithm with a simple link congestion estimation based on a modified IEEE 1588 message sequence is used. The effectiveness of the proposed master redundancy technique is demonstrated by numerical simulation.","PeriodicalId":254081,"journal":{"name":"2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132059556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Cluster TDEV a new performance metric for timing over packet networks 集群TDEV是一种新的性能指标,用于在分组网络上计时
T. Haddad, K. Rahbar, Peter Meyer
{"title":"Cluster TDEV a new performance metric for timing over packet networks","authors":"T. Haddad, K. Rahbar, Peter Meyer","doi":"10.1109/ISPCS.2010.5609803","DOIUrl":"https://doi.org/10.1109/ISPCS.2010.5609803","url":null,"abstract":"One of the main topics on the ITU-T study group 15 (SG15/Q13) agenda is defining new network performance limits for recovered timing information across packet networks. The metrics shall apply to the network packet delay variation (PDV) sequence and help in projecting the required system bandwidth given a specific performance envelope. Current ITU-T TDEV-based metrics are based on processing percentiles of the input PDV sequence. In this paper we introduce a new metric, which is primarily based on a time domain packet clustering approach. The new metric provides more flexibility and improves the prediction of clock recovery performance through operation over different bands of the input network delay sequence. The new metric also provides the designer with the option of using network-specific cluster anchor points. This improves the chances of identifying the most suitable network delay bands for a timing over packet clock recovery system that meets the performance envelope.","PeriodicalId":254081,"journal":{"name":"2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"11 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114091032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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