Estimation of clock skew in telephony over packet switched networks

This study deals with some synchronization issues occurring in telephony over asynchronous packet switched networks. A method for estimation of clock skew i.e. difference between the transmitter and receiver clock frequencies is described. The method is based on modeling the clock skew as a linear t...

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1. Verfasser:	Trump, T.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Clocks Frequency estimation Frequency synchronization Jitter Maximum likelihood estimation Packet switching Parameter estimation Random processes Telephony Transmitters
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description	This study deals with some synchronization issues occurring in telephony over asynchronous packet switched networks. A method for estimation of clock skew i.e. difference between the transmitter and receiver clock frequencies is described. The method is based on modeling the clock skew as a linear trend and the network delay jitter as an exponentially distributed i.i.d. random process. The corresponding maximum likelihood parameter estimator of the trend and jitter parameters is derived and expressions for the mean squared estimation error are provided. Simulation results for computer generated data and for delay data recorded in some existing networks are given.
doi_str_mv	10.1109/ICASSP.2000.860999
format	Conference Proceeding
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A method for estimation of clock skew i.e. difference between the transmitter and receiver clock frequencies is described. The method is based on modeling the clock skew as a linear trend and the network delay jitter as an exponentially distributed i.i.d. random process. The corresponding maximum likelihood parameter estimator of the trend and jitter parameters is derived and expressions for the mean squared estimation error are provided. 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A method for estimation of clock skew i.e. difference between the transmitter and receiver clock frequencies is described. The method is based on modeling the clock skew as a linear trend and the network delay jitter as an exponentially distributed i.i.d. random process. The corresponding maximum likelihood parameter estimator of the trend and jitter parameters is derived and expressions for the mean squared estimation error are provided. Simulation results for computer generated data and for delay data recorded in some existing networks are given.</description><subject>Clocks</subject><subject>Frequency estimation</subject><subject>Frequency synchronization</subject><subject>Jitter</subject><subject>Maximum likelihood estimation</subject><subject>Packet switching</subject><subject>Parameter estimation</subject><subject>Random processes</subject><subject>Telephony</subject><subject>Transmitters</subject><issn>1520-6149</issn><issn>2379-190X</issn><isbn>9780780362932</isbn><isbn>0780362934</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2000</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotj91KxDAUhIM_YF33BfYqL9B6krRpzqWU1RUWFFbBu6VtTtna2pYmWPbtDawwMDAwwzeMbQQkQgA-vhZPh8N7IgEgMRoQ8YpFUuUYC4Sva7bG3ECQ0hKVvGGRyCTEWqR4x-6d-w49k6cmYsXW-fan9O048LHhdT_WHXcdLbwduKeeptM4nPn4SzOfyrojz93S-vpElg_kl3Hu3AO7bcre0frfV-zzeftR7OL920sA3cetyKWPrSZbEegql4BZXktdBSgqRQk6rTIlEUymFFRKQBqiMkOqjMXUNFZZS2rFNpfdloiO0xy45_Pxcl_9AWmETOM</recordid><startdate>2000</startdate><enddate>2000</enddate><creator>Trump, T.</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>2000</creationdate><title>Estimation of clock skew in telephony over packet switched networks</title><author>Trump, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i172t-d6edbe06b720957c26b520ea1a064b5329085330b3104064a59eb8d948fd3dde3</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Clocks</topic><topic>Frequency estimation</topic><topic>Frequency synchronization</topic><topic>Jitter</topic><topic>Maximum likelihood estimation</topic><topic>Packet switching</topic><topic>Parameter estimation</topic><topic>Random processes</topic><topic>Telephony</topic><topic>Transmitters</topic><toplevel>online_resources</toplevel><creatorcontrib>Trump, T.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Trump, T.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Estimation of clock skew in telephony over packet switched networks</atitle><btitle>2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100)</btitle><stitle>ICASSP</stitle><date>2000</date><risdate>2000</risdate><volume>5</volume><spage>2605</spage><epage>2608 vol.5</epage><pages>2605-2608 vol.5</pages><issn>1520-6149</issn><eissn>2379-190X</eissn><isbn>9780780362932</isbn><isbn>0780362934</isbn><abstract>This study deals with some synchronization issues occurring in telephony over asynchronous packet switched networks. A method for estimation of clock skew i.e. difference between the transmitter and receiver clock frequencies is described. The method is based on modeling the clock skew as a linear trend and the network delay jitter as an exponentially distributed i.i.d. random process. The corresponding maximum likelihood parameter estimator of the trend and jitter parameters is derived and expressions for the mean squared estimation error are provided. Simulation results for computer generated data and for delay data recorded in some existing networks are given.</abstract><pub>IEEE</pub><doi>10.1109/ICASSP.2000.860999</doi></addata></record>
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Clocks Frequency estimation Frequency synchronization Jitter Maximum likelihood estimation Packet switching Parameter estimation Random processes Telephony Transmitters
title	Estimation of clock skew in telephony over packet switched networks
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