Elements of information theory
Elements of information theory
The Eifel algorithm: making TCP robust against spurious retransmissions
ACM SIGCOMM Computer Communication Review
TCP/IP performance over 3G wireless links with rate and delay variation
Proceedings of the 8th annual international conference on Mobile computing and networking
An empirical study of bandwidth predictability in mobile computing
Proceedings of the third ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Anatomizing application performance differences on smartphones
Proceedings of the 8th international conference on Mobile systems, applications, and services
A first look at traffic on smartphones
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
Performance comparison of 3G and metro-scale WiFi for vehicular network access
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
Evaluation of data communication opportunities from oil field locations at remote areas
Proceedings of the 2011 ACM SIGCOMM conference on Internet measurement conference
Obtaining in-context measurements of cellular network performance
Proceedings of the 2012 ACM conference on Internet measurement conference
Go this way: navigation for better access quality in mobile networks
Proceedings of the eighth ACM international workshop on Mobility in the evolving internet architecture
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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.