Dear subscribers of the colloquium newsletter,
we are happy to inform you about the next date of our Communication
*Friday, January 21, 2022*
*Speaker*: Ali Yilmaz Yildirim
*Time*: 11:00 a.m.
Meeting-ID: 979 0415 7921
*Master Lecture*: Dynamic Spectrum Access in Highly Mobile Environments
Dynamic Spectrum Access (DSA) has been introduced to enable the
opportunistic utilization of licensed frequency bands by secondary users
(SUs). DSA was introduced for ground-based users, and algorithms were
developed by considering those users. With the increase in air data
traffic, DSA has started to be considered for airborne communication.
Nevertheless developed algorithms for ground-based users can not be
reused for airborne communication. The main reason for that is the high
mobility of aerial vehicles. Therefore, current DSA algorithms should be
examined and adapted for highly mobile environments.
With this need, this thesis aims to develop algorithms for DSA in highly
mobile environments by focusing on the aspects of DSA that require to be
adapted. As a result of SUs being considered as temporary users, SUs
should vacate the channel with the transmission of the primary users
(PUs) and find a new common idle channel to continue their
communication. With the highly varying spectral environment as a result
of high mobility, communication between SUs will be interrupted with PU
transmission more frequently compared to stationary environments. That
is why SUs should detect PU transmission and react by finding a new
common idle channel in the shortest time. By considering the need for an
adaptation in this aspect of DSA, this thesis proposes algorithms and a
frame structure to identify the PU presence and to find a new common
channel in highly mobile environments.
All interested parties are cordially invited, registration is not required.
General information on the colloquium, as well as a current list of
dates of the Communication Technology Colloquium can be found at:
Institute of Communication Systems (IKS)
RWTH Aachen University
Muffeter Weg 3a, 52074 Aachen, Germany
+49 241 80 26958 (phone)