Master Thesis: QUIC Congestion Control

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About this opportunity:

QUIC is a modern Internet transport protocol first developed by Google to improve web traffic by reducing latency and supporting security and mobility. It is now widely used with HTTP/3, and is also being explored for applications such as Media over QUIC (MoQ), which can support low-latency streaming, conferencing, and event distribution.

QUIC can be implemented in user space, enabling multiple implementations with different performance characteristics. Congestion control is essential to prevent network overload, and the selected algorithm can significantly affect application performance—particularly for applications using multiple concurrent streams or real-time encoding.

This thesis will evaluate SCREAMv2 and BBRv3, congestion control algorithms being developed in the context of IETF standardisation, against existing algorithms. The focus will be on mobile-network conditions and tunnelling scenarios such as VPNs.

What you will do:

Implement and verify SCREAMv2 and BBRv3 in two QUIC implementations, one in Rust and one in Python.

Evaluate the algorithms and compare their implementations under different network conditions.

Use emulated and simulated networks, including shallow-buffer networks using Low Latency, Low Loss, Scalable Throughput (L4S), and test relevant application traffic patterns.

If issues or limitations are identified, investigate potential improvements where time allows.

The skills you bring:

You are pursuing a master’s degree in Computer Science, Control Systems, Signal Processing, or a related field.

Programming experience in Python and Rust.

A basic understanding of IP networks and Layer 4 transport protocols such as TCP and QUIC.

Why join Ericsson?At Ericsson, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build solutions never seen before to some of the world’s toughest problems. You´ll be challenged, but you won’t be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

What happens once you apply?Click Here to find all you need to know about what our typical hiring process looks like.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more.

Primary country and city: Sweden (SE) || Stockholm

Req ID: 793009