QUIC is increasingly being deployed on the Internet as an alternative to TCP. However, QUIC over satellite links faces particular challenges as high and variable round-trip times (RTTs) make it difficult to determine and then reach link capacity. Standard TCP slow start algorithms to detect link capacity can perform poorly over satellite links, often exiting slow start too early and limiting throughput or exiting too late and causing unnecessary packet loss. The Slow start Exit At Right CHokepoint (SEARCH) aims to exit slow start after reaching link capacity but before incurring packet loss by tracking delivery rates and exiting when rates have not increased by the expected amount. SEARCH has shown benefits over traditional slow start for TCP connections but has yet to be implemented and evaluated in QUIC. This paper presents the design and implementation of SEARCH in an open-source QUIC library, with the code publicly available as a contribution. Evaluation of SEARCH over a geostationary satellite link show SEARCH successfully exits slow start before loss in the majority of cases, improving goodput compared to the baseline and improving download times by up to 3 seconds in the median case.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Cronin, Amber

Publisher

• Worcester Polytechnic Institute

Identifier

• 122041
• E-project-042924-160718

Palabra Clave

• Congestion Control
• Satellite
• SEARCH
• Slow start
• QUIC

Advisor

• Claypool, Mark L.
• Wyglinski, Alexander

Year

• 2024

Sponsor

• Viasat, Inc.

Date created

• 4/29/2024

Resource type

• Major Qualifying Project

Major

• Computer Science

Source

• E-project-042924-160718

Rights statement

• In Copyright