Master Thesis Students or Interns for the Topic: Performance of collision-prone transmissions in 5G systems HiWi-Job

For the Broadband & Broadcast department in Erlangen, the Fraunhofer Institute for Integrated Circuits IIS is currently seeking


Master Thesis Students or Interns for the Topic: Performance of collision-prone transmissions in 5G systems


The Broadband & Broadcast (BB) department is active in the areas of mobile communications, satellite communications, Internet-of-Things and automotive communication systems. We take new concepts and algorithms from theory, implement them and test them in simulations and in prototypes in our labs and in the field. For instance, we operate a commercial LTE-Advanced testbed network, which we use to check the interoperability of our prototypes with the LTE standard. In short, the BB department establishes a bridge between communication theory and its employment in practice.


Conventionally, users in cellular systems are granted access to the communication channels through handshake mechanisms and scheduling, thereby avoiding unintended collisions between transmissions within each cell. The 5th generation (5G) cellular systems, however, introduce additional use cases, such as the massive machine-type communications (mMTC) and the ultra-reliable low-latency communication (URLLC), which have stringent requirements necessitating grant-free transmissions. Such grant-free transmissions can suffer from potential intra-cell collisions and have limitations in link adaptation due to the inherent unpredictability of the channel quality. Performance assessment of cellular systems with collision-prone transmissions opens several pertinent problems that need to be investigated via link- and system-level evaluations, which will be the focus of this work.


Your responsibilities:

  • Learn the state-of-the-art grant-free random access mechanisms proposed in the literature and the 5G New Radio (NR) standardization.
  • Model essential features of collision-prone transmissions and incorporate them into an existing multi-cell system-level simulation framework.
  • Evaluate collision probability and the effect of the ensuing interference surge on the system performance in terms of detection, outage, and throughput.


Your profile: You …

  • have good knowledge about fundamentals of digital communications (mandatory)
  • have good knowledge about signals and systems (mandatory)
  • have good programming skills in MATLAB/Python/Octave (mandatory)
  • have basic knowledge on probability, statistics, and stochastic processes


What you can expect from us

  • An open and cooperative working environment
  • Collaboration in interesting and innovative projects
  • Many opportunities to gain practical experience


The thesis will be assigned and carried out in accordance with the rules of your university. For this reason, please discuss the thesis with a professor who can advise you over the course of the project.

The duration for the thesis should be 6 months and it can be started from now on.



Please apply for this position using the following link:

Applications are possible in German and English. Please include a cover letter, your CV and your latest transcripts of records (as PDF) and quote ID number 46278. Address your application to Nina Wörlein.


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Additional information is available on our website:

Fraunhofer Institut für Integrierte Schaltungen IIS Erlangen

Ansprechpartner Nina Wörlein
Arbeitsort Am Wolfsmantel 33, 91058 Erlangen
Wochenarbeitszeit k.A.