{"title":"Practical application of 1588 security","authors":"Albert Treytl, B. Hirschler","doi":"10.1109/ISPCS.2008.4659210","DOIUrl":"https://doi.org/10.1109/ISPCS.2008.4659210","url":null,"abstract":"Version 2 of IEEE 1588 contains an extension to secure the given service of clock synchronization. This article describes a practical implementation of this extension for a clock synchronization network. Pitfalls also relevant to other implementations and important properties are discussed and performance results that cover normal operation and stress tests such as denial of service attacks are presented. Additionally, important concepts for integration of hardware timestamping and transparent clock support are presented, which are necessary to use the full potential in more complicated applications.","PeriodicalId":428276,"journal":{"name":"2008 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132926992","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}
{"title":"An application of IEEE 1588 to Industrial Automation","authors":"K. Harris","doi":"10.1109/ISPCS.2008.4659216","DOIUrl":"https://doi.org/10.1109/ISPCS.2008.4659216","url":null,"abstract":"This paper describes an application of the IEEE 1588 standard to industrial automation. Key application use cases are identified that can benefit from time-based control techniques to improve performance results over traditional control methods. A brief discussion of how the 1588 standard may be adopted suitable to these applications. Application problems specific to industrial automation are enumerated and candidate solutions described.","PeriodicalId":428276,"journal":{"name":"2008 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132938218","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}
{"title":"Improving reliability of IEEE1588 in electric substation automation","authors":"J. Tournier, Xiaomin Yin","doi":"10.1109/ISPCS.2008.4659215","DOIUrl":"https://doi.org/10.1109/ISPCS.2008.4659215","url":null,"abstract":"The IEEE 1588 precision time protocol seems to be a promising way to handle synchronization requirements of tomorrow substation automation. However, one of the remaining issues is its lack of reliability in case of the loss of the GPS signal (e.g. due to atmospheric disturbances or failure of the GPS antenna) which would lead to the desynchronization of the devices inside a substation or between different substations. To keep the devices synchronized without the GPS signal, this paper explores different drift clock prediction techniques. Three main approaches based on statistical, probabilistic and time series techniques are evaluated. On one hand, a statistical-based prediction technique can easily reach an accuracy of less than 10 musec for a prediction duration of a couple of seconds at a minimal computing cost. On the other hand, a time series-based prediction technique can provide an accuracy of 76 musec over a period of 48 hours but at a much higher computing power cost. Finally, we identify the most suitable technique for different type of GPS signal loss that typically occurs in the context of substation automation.","PeriodicalId":428276,"journal":{"name":"2008 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123845871","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}
{"title":"Towards an adaptive synchronization policy for wireless sensor networks","authors":"A. Ageev, D. Macii, A. Flammini","doi":"10.1109/ISPCS.2008.4659224","DOIUrl":"https://doi.org/10.1109/ISPCS.2008.4659224","url":null,"abstract":"Time synchronization in wireless sensor networks (WSNs) is essential to coordinate activities distributed among different nodes. In recent years many protocols have been proposed to achieve high-accuracy synchronization. However, up to now only few researchers focused their attention on the issue of trading the number of periodic synchronization events for target accuracy. In fact, the synchronization requirements of low-cost WSNs often are not particularly strict and strongly depend on the intended application. In this paper, we propose an algorithm aimed at changing the number of synchronization events as a function of the probability of finding the various WSN nodes within given tolerance boundaries. Some experimental results to validate the proposed algorithm are reported. This algorithm is expected to pave the way to novel WSN synchronization protocols, which should provide better flexibility and power efficiency than existing ones.","PeriodicalId":428276,"journal":{"name":"2008 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116615054","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}
{"title":"IEEE 1588 syntonization and synchronization functions completely realized in hardware","authors":"Sven Meier, Hans Weibel, Karl Weber","doi":"10.1109/ISPCS.2008.4659209","DOIUrl":"https://doi.org/10.1109/ISPCS.2008.4659209","url":null,"abstract":"The Precision Time Protocol (PTP) is an application layer protocol and therefore destined to be implemented in software. Hardware functions, if present, include a high resolution clock that helps to generate precise timestamps for PTP messages. The presented paper describes an IEEE 1588 clock that realizes syntonization and synchronization functions completely in hardware. It combines a three-port bridge with peer-to-peer Transparent Clock (TC) functionality and an Ordinary Clock (OC), together with other protocol and application specific logic within an FPGA. The aim of such an implementation is to provide a high accuracy and robust system clock that can be driven by a simple crystal oscillator. It can cope with oscillator instabilities caused by environmental effects such as fast temperature changes or accelerations (shock/vibration). It may deliver synchronicity in deeply cascaded topologies.","PeriodicalId":428276,"journal":{"name":"2008 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131885634","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}