Publication No 36400


Necker, M.C.*; Scharf, M.*; Weber, A.


Performance of TCP and HTTP Proxies in UMTS Networks


Measurement and Trials; Network Planning; Performance Evaluation; Protocol Engineering; Traffic Engineering




It is well known that the large round trip time and the highly variable delay in a cellular network may degrade the performance of TCP. Many concepts have been proposed to improve this situation, including performance enhancing proxies (PEP). One important class of PEPs are split connection proxies, which terminate a connection from a server in the Internet in a host close to the Radio Access Network (RAN) and establish a second connection towards the mobile User Equipment (UE). This connection splitting can be done either purely on the transport layer (TCP proxy) or on the application layer (HTTP proxy). While it is clear that an application layer proxy also infers the splitting of an underlying transport layer connection, the performance of web applications may be essentially different for both approaches. This paper first investigates the TCP connection behavior of the Mozilla web browser. Subsequently, the performance of TCP and HTTP proxies in UMTS networks is studied under different scenarios and for different HTTP configurations by means of emulation.



Reference entry

Necker, M.C.; Scharf, M.; Weber, A.
Performance of TCP and HTTP Proxies in UMTS Networks
Proceedings of the 11th European Wireless 2005 (EW 2005), Nicosia, April 2005, pp. 504-513

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Authors marked with an asterisk (*) were IKR staff members at the time the publication has been written.