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IP Quality-of-Service queuing mechanism for a satellite based communication system (SkyWAN)
2003 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The ND SatCom SkyWAN communication system provides best effort Internet Protocol (IP) transport via a geo-stationary satellite. Due to both the large capacity of present day terrestrial networks and satellite services typically offering limited bandwidth, it is of utmost importance to offer scalable service discrimination Quality of Service (QoS) scheme as provided by the Differentiated Services (DS) enhancement to IP. The SkyWAN network currently provides no IP QoS. The abstract interface model provided in this thesis meets the requirements of current applications and is extendable to cover future demands. This thesis analyses the requirements for a DS implementantation in the SkyWAN In-Door Unit, and implements a scalable design based on the Linux kernel implementation. The QoS implementation is fully integrated into the SkyWAN embedded real-time IP router. Both legacy queuing algorithms and the implemented functionality is tested and it is shown that DS and Assured Forwarding compliance for core DS-domain nodes is provided. Due to the lack of bandwidth reservation in the SkyWAN best effort IP traffic class, Expedited Forwarding compliance can not be provided. However, the implementation covers all requirements apart from the assured bandwidth limitation.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Quality of Service, Satellite, Differentiated Services, Satellite Communication, Embedded, Real Time
Keyword [sv]
URN: urn:nbn:se:ltu:diva-42707ISRN: LTU-EX--03/325--SELocal ID: 0af26d3b-b93c-407d-83e5-caeb0ac9034bOAI: diva2:1015933
Subject / course
Student thesis, at least 30 credits
Educational program
Computer Science and Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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