Ericsson

Master Thesis: A Learned World Model for Downlink Link Adaptation

Ericsson  •  Stockholm, SE (Onsite)  •  10 days ago
Apply
AI can make mistakes so check important info. Chat history is never stored.

Job Description

Join our Team

About this opportunity:

We are seeking a talented Master's student to develop an action-conditioned world model for downlink link adaptation in AI-native 5G/6G radio access networks. The thesis will combine real radio and baseband trace data, predictive modeling, and offline reinforcement learning to investigate whether synthetic model-generated trajectories can enable safer and more sample-efficient policy training.

What you will do:

  • Characterize available 5G cell and baseband trace data, including radio conditions, mobility, interference, and traffic load.
  • Preprocess traces into state, action, next-state, and key-performance-indicator tuples for model training and evaluation.
  • Design and train a compact latent, action-conditioned world model that predicts short-horizon throughput, block error rate, channel-quality indicator, and spectral-efficiency trajectories.
  • Evaluate single-step and multi-step prediction accuracy and study how well the model separates the effect of modulation-and-coding actions from external channel variation.
  • Integrate the learned world model into an offline reinforcement-learning pipeline to generate synthetic rollout data.
  • Compare rule-based outer-loop link adaptation, logged-data-only offline reinforcement learning, and world-model-augmented reinforcement learning.
  • If time permits, investigate calibrated uncertainty estimates to restrict policy exploration to regions where predictions are reliable.
  • Document methods, results, and recommendations in the thesis report and present the work at the final defense.
  • Collaborate with supervisors and radio, AI, and baseband experts to ensure technical relevance and sound evaluation.

The skills you bring:

Required Skills and Qualifications

  • Enrolled in or recently admitted to a Master’s program in Electrical Engineering, Computer Engineering, Computer Science, Machine Learning, Wireless Communications, or a related field.
  • Strong foundation in machine learning and data analysis.
  • Programming experience in Python and familiarity with a deep-learning framework such as PyTorch.
  • Basic understanding of wireless communications, radio access networks, or link-level performance metrics.
  • Ability to work with time-series or sequential data and design reproducible experiments.
  • Solid technical writing and communication skills.
  • Independent, analytical, and collaborative problem-solving mindset.

Preferred Qualifications

  • Experience with reinforcement learning, offline reinforcement learning, model-based reinforcement learning, or sequence modeling.
  • Familiarity with latent dynamics models, recurrent state-space models, transformers, probabilistic models, or uncertainty estimation.
  • Knowledge of 5G/6G link adaptation, modulation and coding schemes, channel-quality reporting, block error rate, or radio scheduling.
  • Experience with MATLAB for signal-processing, trace preprocessing, or validation.
  • Experience handling large experimental datasets, simulation traces, or performance-counter logs.
Ericsson

About Ericsson

The future of mobile isn’t on the horizon, it’s happening now. At Ericsson, we’re building the foundation for an open network ecosystem where industries, developers, and enterprises thrive.

The convergence of 5G, AI, cloud, and network APIs isn’t just a technological shift; it’s a transformation that is redefining industries and enhancing everyday life. Open, programmable networks are enabling real-time innovation and unlocking new business models across the globe.

Imagine a world where developers can dynamically access network capabilities on demand, where enterprises don’t just use connectivity but shape it. This isn’t a distant vision, it’s the ecosystem we’re creating today.

Collaboration fuels everything we do. By working across industries, we’re designing a future where connectivity isn’t just seamless. It’s intelligent, programmable, and transformative.

The shift is happening. Are you part of it?

Industry
Telecommunications
Company Size
10,000+ employees
Headquarters
Kista, SE
Year Founded
1876
Social Media