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Evaluation of a ROHC profile for TCP/IP header compression
2004 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

For links with narrow bandwidth it can be important to compress protocol headers if these represent a significant part of the packets sent on the link. The Robust Header Compression (ROHC) framework has made such compression possible for different protocols. Recent efforts have been focused on creating a compression profile for the TCP protocol. In this thesis the suggested specification for such a profile is evaluated. The evaluation is mainly focused on the compression ratio and the robustness of the profile. The profile specifies how to compress TCP-options unlike other existing TCP compression schemes. The compression of the options is evaluated in this thesis. A new concept called context replication is also used in the profile. This mechanism is created to improve the start-up phase when multiple short-lived flows are used. This mechanism is also evaluated. The benefits of compressing the TCP protocol are substantial when the data is relatively small compared to the header. ROHC TCP provides the possibility to compress the TCP headers efficiently for a large variety of behaviours due to different TCP stack implementations. This fact leads to a more complex structure for the protocol however. The compression of options can be important especially the timestamp option can be worth compressing. Context replication only affects the overall compression if the majority of the headers are used to initialize a stream.

Place, publisher, year, edition, pages
Keyword [en]
Technology, ROHC, TCP compression, header compression
Keyword [sv]
URN: urn:nbn:se:ltu:diva-50750ISRN: LTU-EX--04/144--SELocal ID: 7fa70726-12a3-48f1-8afa-c953c8a4b37aOAI: diva2:1024112
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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