Prof. Joerg Widmer
IMDEA Networks (Spain)
Date: : September 12, 2017 (afternoon)
The tutorial will highlight some of the challenges of and possible approaches for networking in the millimeter-wave (mm-wave) band. Communication at such high frequencies brings unique challenges, primarily due the high signal attenuation, which can only be overcome by the use of highly directional antennas. On the one hand side, this results in much less interference compared to omni-directional communication at lower frequencies, allowing for a high degree of spatial reuse and potentially simpler Medium Access Control Protocols (MAC) and interference management mechanisms. On the other hand, high directionality may cause deafness due to beam misalignments, whereas channels may appear and disappear over very short time intervals and cause sudden communication blockages, in particular for mobile devices. The tutorial specifically focuses on networking aspects of the MAC layer and above. It starts by an overview of mm-wave communication aspects and characteristics, and then delves into the most important network and protocol design aspects, ranging from beam-training and medium access to the impact on transport protocols and efficient network architectures.
Joerg Widmer is Research Professor as well as Research Director of IMDEA Networks in Madrid, Spain. His research focuses primarily on wireless networks, ranging from extremely high frequency millimeter-wave communication and MAC layer design to mobile network architectures. From 2005 to 2010, he was manager of the Ubiquitous Networking Research Group at DOCOMO Euro-Labs in Munich, Germany, leading several projects in the area of mobile and cellular networks. Before, he worked as post-doctoral researcher at EPFL, Switzerland on ultra-wide band communication and network coding. He was a visiting researcher at the International Computer Science Institute in Berkeley, CA, USA and University College London, UK. Joerg Widmer authored more than 150 conference and journal papers and three IETF RFCs, holds 13 patents, serves on the editorial board of IEEE Transactions on Communications, and regularly participates in program committees of several major conferences. He was awarded an ERC consolidator grant, the Friedrich Wilhelm Bessel Research Award of the Alexander von Humboldt Foundation, as well as a Spanish Ramon y Cajal grant, and is senior member of IEEE and ACM.