Model-based evaluation and improvement of PTP syntonisation accuracy in packet-switched backhaul networks for mobile applications

Wolter, Katinka, Reinecke, Philipp ORCID: https://orcid.org/0000-0002-2411-0891 and Mittermaier, Alfons 2011. Model-based evaluation and improvement of PTP syntonisation accuracy in packet-switched backhaul networks for mobile applications. Presented at: EPEW 2011: 8th European Performance Engineering Workshop, Borrowdale, UK, 12-13 October 2011. Published in: Thomas, Nigel ed. Computer Performance Engineering: 8th European Performance Engineering Workshop, EPEW 2011, Borrowdale, UK, October 12-13, 2011. Proceedings. Lecture notes in computer science. Lecture Notes in Computer Science , vol.6977 Springer, 219 - 234. 10.1007/978-3-642-24749-1_17

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Abstract

Base stations in mobile networks have very strict frequency synchronisation (also referred to as syntonisation) requirements. As backhaul networks are migrated to asynchronous packet-switching technology, timing over packet using the IEEE 1588 Precision Time Protocol (PTP) replaces current synchronisation methods that rely on the synchronous bit clock of the network. With PTP, base-station clocks derive their frequency from the inter-packet delays of Sync messages sent by a high-quality time source at regular time intervals. Packet-delay variation (PDV) thus has a major impact on the achievable synchronisation quality, and the amount of PDV of a backhaul network determines whether the network can support frequency synchronisation of base stations. We present a simulation and an analytical approach to assessing the suitability of backhaul networks for clock synchronisation using PTP and derive two methods for reducing PDV.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics
Publisher:	Springer
ISBN:	9783642247484
ISSN:	1611-3349
Last Modified:	26 Oct 2022 07:13
URI:	https://orca.cardiff.ac.uk/id/eprint/124316

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