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The wireless era requires smarter communication networks

The evolution of wireless communication — and all the new applications enabled by it — drastically increases the demand on the performance of communication networks. Many of these new wireless applications are subject to time critical constraints, especially ones related to human safety. If these constraints are violated, the consequences may be severe.

In Swedish.

Le-Nam Hoang, a PhD student at the School of Information Technology at Halmstad University, presents his licentiate thesis today. Le-Nam aims, in his thesis, to fulfil the real-time communication constraints in these wireless applications.

– My research addresses two main questions: how can the probability of successful message delivery in a wireless distributed control system be increased, without causing additional delays? And how can the proposed approach be incorporated into a solution that provides predictable channel access and uses standardised chipsets of reasonably low complexity and cost?

Real-time challenges

The advantages of wireless access are many, as control systems become mobile, autonomous and connected. Examples include platooning on our roads and automated factories. However, distributed control systems have demanding requirements on both reliability and timeliness, so-called “real-time requirements”. In addition, wireless channels are, by nature, more exposed to noise and interference than their wired counterparts.

– Consequently, these requirements are challenging for wireless networks. In my thesis, I propose a framework to fulfil the real-time communication constraints in distributed control applications, says Le-Nam Hoang, who will continue with his research at Halmstad University towards his PhD.

Framework structure for real-time communication.

The figure is an example a framework structure for real-time communication – this framework is for a platoon of N trucks.


Le-Nam Hoang

Le-Nam Hoang, a PhD student at the School of Information Technology at Halmstad University, presented his licentiate thesis on June 1, 2015.

Licentiate seminar

Thesis title: Relaying for Timely and Reliable Message Dissemination in Wireless Distributed Control Systems

Time: June 1 at 13.15

Place: Haldasalen, House Visionen

Opponent: Docent Fredrik Brännström, Associate Professor at Chalmers University of Technology

Examiner: Professor Anatanas Verikas, Halmstad University

Main supervisor: Docent Elisabeth Uhlemann, Halmstad University

Co-supervisor: Professor Magnus Jonsson, Halmstad University

Updated 2015-06-01