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On synchronization techniques: performance and impact on time metrics monitoring
Author(s) -
Adami Davide,
Garroppo Rosario G.,
Giordano Stefano,
Lucetti Stefano
Publication year - 2003
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.587
Subject(s) - network time protocol , computer science , global positioning system , synchronization (alternating current) , metric (unit) , real time computing , server , time synchronization , quality of service , computer network , performance metric , clock synchronization , the internet , protocol (science) , telecommunications , medicine , channel (broadcasting) , operations management , alternative medicine , management , pathology , world wide web , economics
The paper presents an experimental comparison of device synchronization strategies to monitor quality of service (QoS) time metrics, such as the one‐way delay and the delay variation. The compared strategies are based on global positioning system (GPS), public Internet network time protocol (NTP) servers and ad hoc GPS‐based NTP servers with different treatments of the NTP traffic. The presented experimental results allow to quantitatively evaluate the level of performance achievable using each synchronization technique. Finally, considering a satellite test bed, we focus our analysis on two relevant aspects of time metrics monitoring: the impact of the synchronization errors on the metrics observation and the different values that can be measured when a metric is monitored at the application or data link level. Copyright © 2003 John Wiley & Sons, Ltd.