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Quality of Service for IP Networks: In Theory and Practice
Blekinge Institute of Technology, Department of Software Engineering and Computer Science.
2002 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesisAlternative title
Quality of service för IP-nätverk : i teori och praktik (Swedish)
Abstract [en]

Quality of Service (QoS) for IP networks is a set of methods for establishing better and more reliable performance for today's and tomorrow's networks. When transmitting real-time data from such applications as IP telephony, video conferencing and IP broadcasting, it is imperative that the data is transmitted quickly and with even delays. Longer delays mean problems when communicating, varying transfer times means that data packets are delivered too late to be used, or even dropped. As network applications grow more demanding, the networks can not always keep up. Even though a network may offer more bandwidth than needed, disturbances to sound and picture is to be expected because of the competition with other data traffic. QoS can solve many such problems by reserving private channels through a network, or differentiating classes of traffic to prioritise the sensitive data. QoS also contains methods to speed up backbone data transfers by in advance planning complete routes over a network, and avoiding congested or broken connections. This report explains QoS as it stands today, together with suggestions on how it could work for Axis Communications AB. It also presents an experiment to test some QoS methods in a real-time sensitive situation, demonstrating the effectiveness and priceworthiness of QoS.

Abstract [sv]

Quality Of Service (QoS) för IP-nätverk är en uppsättning metoder för att erbjuda garantier i hastighet och pålithlighet för överföringar i IP-nätverk. I takt med att nätverk blir snabbare och att flera former av kommunikation flyttas till IP-nätverk, kommer krav på stabilare och mer pålitliga överföringar. QoS gör det möjligt att använda vanliga datornätverk till att exempelvis ringa och genomföra videokonferanser, applikationer som vanligtvis plågas av bristande kvalité på grund av att nätverkstrafik tappas eller försenas. Denna rapport presenterar nuvarande problem och dess lösningar i form av QoS. För att testa vissa QoS-funktioner och mognaden av Open Source-implementationer för QoS görs tester som även visar effektiviteten och de ekonomiska fördelarna av QoS.

Place, publisher, year, edition, pages
2002. , 59 p.
Keyword [en]
IP Networks, QoS, Quality, Nätverk, Ethernet
National Category
Computer Sciences
URN: urn:nbn:se:bth-3295Local ID: diva2:830598
Magnus von Rosen Juryvägen 35 226 57 Lund 046 - 13 89 61 magnusvr@telia.comAvailable from: 2015-04-22 Created: 2002-11-20 Last updated: 2018-01-11Bibliographically approved

Open Access in DiVA

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