One-Way Delay Measurement: State of the Art

Vito, Luca De; Rapuano, Sergio; Tomaciello, Laura

doi:10.1109/tim.2008.926052

Cited by 90 publications

(39 citation statements)

References 15 publications

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“…In reality, these assumptions are typically not true, and therefore some external clock synchronisation mechanism is required (as considered in [1]). Although our clients and server are synchronised using NTP, their clocks are still subject to an unknown relative offset β (the difference between the values of the clocks), and relative skew α (the ratio of the rates of the clocks).…”

Section: Skew Removal / One-way Delaymentioning

confidence: 99%

End-to-end and network-internal measurements of real-time traffic to residential users

Ellis

Perkins

Pezaros

2011

Proceedings of the Second Annual ACM Conference on Multimedia Systems

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Little performance data currently exists for streaming highquality Internet video to residential users. Data on streaming performance will provide valuable input to the design of new protocols and applications, such as congestion control and error-correction schemes, and sizing playout buffers in video receivers. This paper presents measurements of streaming real-time UDP traffic to a number of residential users, and discusses the basic characteristics of the data.

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Section: Skew Removal / One-way Delaymentioning

confidence: 99%

End-to-end and network-internal measurements of real-time traffic to residential users

Ellis

Perkins

Pezaros

2011

Proceedings of the Second Annual ACM Conference on Multimedia Systems

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“…However, it should be noted that this depends a lot on the specific hardware and software used. In a recent work [9] the performance of the Linux PTP daemon was evaluated and their findings were in line with [8]. What concerns NTP there are also improvements in this provided by the NTPv4 [10] which could bring the accuracy down into the µs region in certain cases.…”

Section: Related Workmentioning

confidence: 61%

“…However, as the computation of OWD is based on time information from different nodes in the network it has very strict requirements in terms of clock accuracy and synchronization [7]. As described in [8] the main protocols for distributing clock information across as network, NTP (Network Time Protocol) and PTP (Precision Time Protocol) have different capabilities in this regard. The latter is stated to give accuracy in the order of µs, while the former in the order of ms.…”

Section: Related Workmentioning

confidence: 99%

A Measurement Study of Active Probing on Access Links

Villa

Heegaard

2013

Lecture Notes in Computer Science

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Abstract. This paper presents a measurement study of two different methods for active probing of cross traffic on access links. The categories used in the study are packet pair probing and one-way-delay probing. The first approach uses measured increase in packet spacing as indicator of cross traffic presence, while the latter uses increase in one-way-delay for probe packets as indicator. These methods have been chosen because they are fundamentally different in terms of requirements, benefits and challenges. The main novelty of this paper is the presentation and discussion of measurement results from an access network using an adaptive video service as cross-traffic. The findings clearly illustrate the potential strengths of a probing method based on one-way-delay measurements, under the condition that the required timing accuracy is achieved and delay characteristics is available for the involved network path. The benefit of using Precision Time Protocol instead of Network Time Protocol is illustrated, even in networks of limited size.

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“…Traditional methods to determine one way delays are based on precise clock synchronization [14]. The delay estimation problem here is unique in that there is identical traffic arriving on two different interfaces and we are not interested in the delay of the link itself, but in the relative delay between the links.…”

Section: Delay Difference Estimationmentioning

confidence: 99%

Lossless Multicast Handovers in Proxy Fast Mobile IPv6 Networks

Meijerink

Heijenk

2015

Lecture Notes in Computer Science

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Abstract. There is a demand in the Public Protection and Disaster Relief (PPDR) community for high bandwidth services on mobile devices. Group communication is an important aspect of PPDR networks. In IP based networks multicast is the preferred method to efficiently transmit data to more than one receiver simultaneously. It is important PPDR users can switch seamlessly between wireless networks. This paper describes improvements to multicast in Fast handovers for Proxy Mobile IPv6 (PFMIPv6) to provide seamless mobility to its users. We also identify and explore the specific problems stemming from difference in end-to-end delay between the old and new path during handovers for multicast traffic. A novel mechanism to determine the delay difference between two paths in a PFMIPv6 system is described and an implementation of this system is evaluated. It is shown the proposed approach can prevent multicast packet loss during a handover.

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One-Way Delay Measurement: State of the Art

Cited by 90 publications

References 15 publications

End-to-end and network-internal measurements of real-time traffic to residential users

End-to-end and network-internal measurements of real-time traffic to residential users

A Measurement Study of Active Probing on Access Links

Lossless Multicast Handovers in Proxy Fast Mobile IPv6 Networks

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