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Statements

Subject Item
n2:RIV%2F68407700%3A21230%2F14%3A00219454%21RIV15-TA0-21230___
rdf:type
skos:Concept n17:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.measurement.2014.03.020
dcterms:description
Node synchronization can be implemented in an Ethernet network using time protocols; e.g. IEEE 1588 [1]. Active network components like switches and routers influence the accuracy of synchronization because they affect a packet delay variation in the network. Therefore, the delay is not constant and, as well, the delay in one direction is not equal to the delay in the opposite direction. This paper presents a low-cost device that can measure the packet delay with high accuracy in both communication directions and, at the same time, calculate network parameters including a packet delay variation, path asymmetry and dependency of the delay in opposite directions. The measurements can be used for the estimation of synchronization accuracy within the tested network. Some network elements have an unexpectedly large variability of path delays and large asymmetry. This behavior can be measured directly and therefore it is possible to eliminate these devices from the network. The results can be also used for the manual calibration of end nodes. It is not recommended, however, as it is vulnerable to network topology changes. Node synchronization can be implemented in an Ethernet network using time protocols; e.g. IEEE 1588 [1]. Active network components like switches and routers influence the accuracy of synchronization because they affect a packet delay variation in the network. Therefore, the delay is not constant and, as well, the delay in one direction is not equal to the delay in the opposite direction. This paper presents a low-cost device that can measure the packet delay with high accuracy in both communication directions and, at the same time, calculate network parameters including a packet delay variation, path asymmetry and dependency of the delay in opposite directions. The measurements can be used for the estimation of synchronization accuracy within the tested network. Some network elements have an unexpectedly large variability of path delays and large asymmetry. This behavior can be measured directly and therefore it is possible to eliminate these devices from the network. The results can be also used for the manual calibration of end nodes. It is not recommended, however, as it is vulnerable to network topology changes.
dcterms:title
Precise packet delay measurement in an Ethernet network Precise packet delay measurement in an Ethernet network
skos:prefLabel
Precise packet delay measurement in an Ethernet network Precise packet delay measurement in an Ethernet network
skos:notation
RIV/68407700:21230/14:00219454!RIV15-TA0-21230___
n3:aktivita
n6:P
n3:aktivity
P(TA01010988)
n3:cisloPeriodika
54
n3:dodaniDat
n14:2015
n3:domaciTvurceVysledku
n13:4248864 n13:3591360 n13:7334664
n3:druhVysledku
n8:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
38683
n3:idVysledku
RIV/68407700:21230/14:00219454
n3:jazykVysledku
n11:eng
n3:klicovaSlova
IEEE 1588; Precise Time Protocol; Packet delay variation; Ethernet network
n3:klicoveSlovo
n10:Ethernet%20network n10:Precise%20Time%20Protocol n10:IEEE%201588 n10:Packet%20delay%20variation
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[9EF4C42C2397]
n3:nazevZdroje
Measurement
n3:obor
n16:JA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n20:TA01010988
n3:rokUplatneniVysledku
n14:2014
n3:svazekPeriodika
54
n3:tvurceVysledku
Roztočil, Jaroslav Breuer, Jan Vigner, Vojtěch
n3:wos
000336613600024
s:issn
0263-2241
s:numberOfPages
7
n15:doi
10.1016/j.measurement.2014.03.020
n19:organizacniJednotka
21230