Communication Systems and Networks

Picture : Multipath TCP deployed on smartphones in Korea

In ICTEAM, a large variety of problems related to communication systems and networks are investigated. The different topics cover all the layers of communication systems going from the physical layer up to the application layer, including the MAC, network and transport layers. A few examples of particular activities are detailed below. Thanks to its expertise on such a large array of subjects, ICTEAM is able to undertake complex research projects dealing with very different aspects of communication systems.

Principal Investigators :

Olivier Bonaventure, Jean-Charles Delvenne, Christophe De Vleeschouwer, Denis Flandre, Raphaël Jungers, Jérôme Louveaux, Benoit Macq, Claude Oestges, Etienne Rivière, Ramin Sadre, Peter Van Roy, Luc Vandendorpe, Danielle Vanhoenacker-Janvier

Research Labs :

Image and Signal Processing Group (ISPGroup), IP Networking Lab, Programming Languages and Distributed Computing

Research Areas :

The research focuses on the physical layer and the MAC layer of modern wired and wireless communications systems. Transmitters, receivers and resource allocation are designed and optimized for OFDM(A) based systems, multi-antenna systems (MIMO, distributed MIMO, relay techniques) and multiuser systems. At the receiver side, both detection and estimation are considered. Iterative or turbo based techniques are receiving a lot of attention. Particular attention is paid to multicell wireless communications and sensor networks.

This researches focuses on ultra wide band (UWB) based localisation or positioning. Methods considered are time of arrival (TOA), time difference of arrival (TDOA) and angle of arrival (AOA). Bounds have been derived to assess the potential of UWB, understand the impact of multipath propagation and investigate the ambiguities. Practical estimators are proposed and their performance is investigated. A practical testbed has been developed and is being upgraded. An accuracy of a few millimeters has been achieved for indoor positioning over distances of about ten meters and with obstacles.

The DSL activity is investigating signal processing solutions, mainly at the physical layer, for improving the performance of communication on the telephone lines (digital subscriber lines). The current focus is on the mitigation of the crosstalk between lines, including pre-/post-cancellation techniques, adaptive crosstalk channel estimation, as well as dynamic spectrum management by means of centralized optimization.

The radio propagation activity aims at the measurement, characterization and modeling of multi-dimensional propagation channels for a range of wireless systems and networks: MIMO, WLAN/WPAN, body area networks, vehicular communication systems, etc. The facilities include a state-of-the art channel MIMO sounder, various network analyzers and antennas, as well a ray-tracing tool.

  • evaluation of link budget for satellite systems, deep-space missions, ...
  • generation of time series for the design of fade mitigation techniquespropagation modelling into collapsed buildings and harsh environments for radio-localization

We develop new protocols and mechanisms for the global Internet. Our main area of expertise are the network and transport layers of the TCP/IP stack. More specifically, we have proposed extensions to allow routing protocols (both intradomain and interdomain) to better handle link failures and have designed and evaluated various types of traffic engineering techniques. We also address the multihoming problem both from the network viewpoint and the endhost viewpoint. We carry both theoretical research and applied research by developing reference implementations of new protocols. We actively participate in the development of future Internet architecture proposals and contribute to standardisation within the Internet Engineering Task Force.

Image and video compression algorithms are investigated, including for stereo and multi-view contents. Visually pleasant and fluent video streaming or image browsing are implemented by adapting compression and forwarding mechanisms to network and terminal resources. This implies the rate-distortion optimization of image/video packet schedules, but also adaptive switching between multiple versions of the content. For low bandwidth wireless accesses, interactive streaming architectures are investigated to allow the end-user to control the trade-offs involved when reducing the spatial and temporal resolution of the streamed content.

Distributed systems are becoming ever larger and must handle problems of frequent faults, security issues, and management complexity.  We have built large-scale transactional storage systems based on techniques from self-organizing peer-to-peer networks.  We are developing design techniques for these systems based on ideas from complex systems theory.  Future work will focus on building practical programming platforms that provide cloud computing properties such as elasticity and that support large-scale applications using techniques from machine learning. 

Most recent publications

Below are listed the 10 most recent journal articles and conference papers produced in this research area. You also can access all publications by following this link : see all publications

Journal Articles

1. Pan, Yun-Tian; Zheng, Guo-Xin; Oestges, Claude. Characterization of Polarized Radio Channel with Leaky Coaxial Cable in a Tunnel-like Environment. In: IEEE Antennas and Wireless Propagation Letters,. doi:10.1109/LAWP.2017.2747773.

2. Vinogradov, Evgenii; Bamba, Aliou; Joseph, Wout; Oestges, Claude. Physical-Statistical Modeling of Dynamic Indoor Power Delay Profiles. In: IEEE Transactions on Wireless Communications,. doi:10.1109/TWC.2017.2724034.

3. Ai, Bo; Oestges, Claude. Antennas and Propagation for Future Transportation Systems. In: IEEE Antennas and Wireless Propagation Letters,. doi:10.1109/LAWP.2017.2699259.

4. Makhoul, Gloria; Mani, Francesco; DErrico, Raffaele; Oestges, Claude. On the Modeling of Time Correlation Functions for Mobile-to-Mobile Fading Channels in Indoor Environments. In: IEEE Antennas and Wireless Propagation Letters,. doi:10.1109/LAWP.2017.2682959.

5. Doone, Michael G.; Cotton, Simon L.; Oestges, Claude. An Experimental Investigation into the Impact of Vehicular Traffic on Interpersonal Wearable-to-Wearable Communications Channels. In: IEEE Transactions on Antennas and Propagation,. doi:10.1109/TAP.2017.2738071.

6. Bonaventure, Olivier; Paasch, Christoph; Detal, Gregory. Use Cases and Operational Experience with Multipath TCP. In: Requests for Comments,. doi:10.17487/RFC8041.

7. Wang, Zijian; Vandendorpe, Luc. Subcarrier Allocation and Precoder Design for Energy Efficient MIMO-OFDMA Downlink Systems. In: IEEE Transactions on Communications,. doi:10.1109/TCOMM.2016.2626370.

8. Castel, Thijs; Lemey, Sam; Van Torre, Patrick; Oestges, Claude; Rogier, Hendrik. Four-element Ultra-Wideband Textile Cross Array for Dual Spatial and Dual Polarization Diversity. In: IEEE Antennas and Wireless Propagation Letters,. doi:10.1109/LAWP.2016.2585308.

9. Mani, Francesco; Makhoul, Gloria; Oestges, Claude; D Errico, Raffaele. On the generation of correlated short and long term fading for multiple BANs. In: IEEE Antennas and Wireless Propagation Letters,. doi:10.1109/LAWP.2016.2590474.

10. Van Hecke, J.; Del Fiorentino, P.; Andreotti, R.; Lottici, V.; Giannetti, F.; Vandendorpe, Luc; Moeneclaey, M. Adaptive coding and modulation using imperfect CSI in cognitive BIC-OFDM systems. In: Eurasip Journal on Wireless Communications and Networking,.

Conference Papers

1. Oestges, Claude; Dementieva, Natalia; Vinogradov, Evgenii. Experimental Characterization of Geometry-Based Channel Models in Suburban Microcells. 2017, 978-1-5386-3531-5.

2. Wiame, Charles; Vandendorpe, Luc; Oestges, Claude. Comparison of Access Point Distributions and Beamforming Strategies for Massive MIMO Networks : a Stochastic Geometry Approach. 2017, 978-1-5386-3531-5.

3. Oestges, Claude; Dementieva, Natalia; Vinogradov, Evgenii. Evaluation of Large-Scale Parameters in Urban Microcells at 3.8 GHz. 2017, 978-9082598704.

4. Hanssens, Brecht; Martinez-Ingles, Maria-Teresa; Tanghe, Emmeric; Plets, David; Molina-Garcia-Pardo, Jose-Maria; Oestges, Claude; Martens, Luc; Joseph, Wout. Polarimetric analysis of reverberation times for 94 GHz indoor communication. 2017, 978-8-8907-0187-0. doi:10.23919/EuCAP.2017.7928035; 10.23919/EuCAP.2017.7928035.

5. Makhoul, Gloria; Mani, Francesco; D'Errico, Raffaele; Oestges, Claude. Doppler characteristics for indoor mobile-to-mobile channels. 2017, 978-8-8907-0187-0. doi:10.23919/EuCAP.2017.7928150; 10.23919/EuCAP.2017.7928150.

6. Miao, Yang; Gueuning, Quentin; Gan, Mingming; Oestges, Claude. Adding diffuse scattering correlation to effective roughness models in ray tracing. 2017, 978-8-8907-0187-0. doi:10.23919/EuCAP.2017.7928171.

7. Gusi-Amigo, Adria; Ciosas, Pau; Vandendorpe, Luc. Mean square error performance of sample mean and sample median estimators. 2016, 16252493. doi:10.1109/SSP.2016.7551739.

8. Wang, Zijian; Vandendorpe, Luc. Energy efficient power allocation and relay selection in MIMO relay channels. 2016, 2166-9589. doi:10.1109/PIMRC.2016.7794640.

9. Feuillen, Thomas; Mallat, Achraf; Vandendorpe, Luc. Stepped frequency radar for automotive application: Range-Doppler coupling and distortions analysis. 2016, 2155-7586. doi:10.1109/MILCOM.2016.7795443.

10. Oestges, Claude. Vehicular Channel Characterization and Modeling.