TCP over CDMA2000 Networks: A Cross-Layer Measurement Study


Show simple item record Mattar, Karim Abdel Magid en_US 2011-10-20T04:42:48Z 2011-10-20T04:42:48Z 2007 en_US
dc.description.abstract Modern cellular channels in 3G networks incorporate sophisticated power control and dynamic rate adaptation which can have a significant impact on adaptive transport layer protocols, such as TCP. Though there exists studies that have evaluated the performance of TCP over such networks, they are based solely on observations at the transport layer and hence have no visibility into the impact of lower layer dynamics, which are a key characteristic of these networks. In this work, we present a detailed characterization of TCP behavior based on cross-layer measurement of transport, as well as RF and MAC layer parameters. In particular, through a series of active TCP/UDP experiments and measurement of the relevant variables at all three layers, we characterize both, the wireless scheduler in a commercial CDMA2000 network and its impact on TCP dynamics. Somewhat surprisingly, our findings indicate that the wireless scheduler is mostly insensitive to channel quality and sector load over short timescales and is mainly affected by the transport layer data rate. Furthermore, we empirically demonstrate the impact of the wireless scheduler on various TCP parameters such as the round trip time, throughput and packet loss rate. en_US
dc.language.iso en_US en_US
dc.publisher Boston University Computer Science Department en_US
dc.relation.ispartofseries BUCS Technical Reports;BUCS-TR-2007-016 en_US
dc.title TCP over CDMA2000 Networks: A Cross-Layer Measurement Study en_US
dc.type Technical Report en_US Master of Arts masters Computer Science Boston University
dc.relation.isnodouble 1677 *

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