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SEARCH: Robust TCP Slow Start Performance over Satellite Networks
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SEARCH: Robust TCP Slow Start Performance over Satellite Networks


Maryam Ataei Kachooei, Jae Chung, Feng Li, Benjamin Peters, and Mark Claypool

In Proceedings of the 48th IEEE Conference on Local Computer Networks (LCN)
Daytona Beach, FL, USA
October 1-5, 2023


TCP slow start begins at a conservative bitrate but quickly ramps up to the available bandwidth. Unfortunately, current TCP implementations can either: 1) exit from slow start prematurely, which is especially detrimental to utilization on satellite links, or 2) exit from slow start too late, causing unnecessary packet loss. We propose a novel technique to exit slow start while avoiding both premature and belated exits. We evaluate our approach over commercial satellite links -- long, fat networks that pose challenges to determining the right slow start exit time. Preliminary results show a high success rate for picking appropriate exit points over satellite links, with potentially being applicable to other types of networks, more generally.


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