TY - GEN
T1 - Towards a Network Aware Model of the Time Uncertainty Bound in Precision Time Protocol
AU - Deshpande, Yash
AU - Diederich, Philip
AU - Kellerer, Wolfgang
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Synchronizing the system time between devices by exchanging timestamped messages over the network is a popular method to achieve time-consistency in distributed applications. Accurate time synchronization is essential in applications such as cellular communication, industrial control, and transactional databases. These applications consider the maximum possible time offset or the Time Uncertainty Bound (TUB) in the network while configuring their guard bands and waiting times. Choosing the right value for the TUB poses a fundamental challenge to the system designer - a conservatively high value of the TUB decreases the chances of time-based byzantine faults but increases latency due to larger guard bands and waiting times. The TUB is affected by packet delay variation (PDV) of time synchronization messages due to congestion from background network traffic. In this work, we use Network Calculus (NC) to derive the relation between network traffic and the TUB for a network built with commercial off-the-shelf (COTS) hardware. For centrally deployed and monitored local area networks (LAN)s such as in cellular networks and datacenters this relation could be useful for system designers to plug a better-informed value of the TUB.
AB - Synchronizing the system time between devices by exchanging timestamped messages over the network is a popular method to achieve time-consistency in distributed applications. Accurate time synchronization is essential in applications such as cellular communication, industrial control, and transactional databases. These applications consider the maximum possible time offset or the Time Uncertainty Bound (TUB) in the network while configuring their guard bands and waiting times. Choosing the right value for the TUB poses a fundamental challenge to the system designer - a conservatively high value of the TUB decreases the chances of time-based byzantine faults but increases latency due to larger guard bands and waiting times. The TUB is affected by packet delay variation (PDV) of time synchronization messages due to congestion from background network traffic. In this work, we use Network Calculus (NC) to derive the relation between network traffic and the TUB for a network built with commercial off-the-shelf (COTS) hardware. For centrally deployed and monitored local area networks (LAN)s such as in cellular networks and datacenters this relation could be useful for system designers to plug a better-informed value of the TUB.
UR - http://www.scopus.com/inward/record.url?scp=85171614154&partnerID=8YFLogxK
U2 - 10.1109/INFOCOMWKSHPS57453.2023.10226161
DO - 10.1109/INFOCOMWKSHPS57453.2023.10226161
M3 - Conference contribution
AN - SCOPUS:85171614154
T3 - IEEE INFOCOM 2023 - Conference on Computer Communications Workshops, INFOCOM WKSHPS 2023
BT - IEEE INFOCOM 2023 - Conference on Computer Communications Workshops, INFOCOM WKSHPS 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE INFOCOM Conference on Computer Communications Workshops, INFOCOM WKSHPS 2023
Y2 - 20 May 2023
ER -