Creating and sharing knowledge for telecommunications

Wave-Controlled Metasurface-based Reconfigurable Intelligence Surfaces

on 04-01-2023

... ComSoc PT Chapter and IEEE VTS PT Chapter, and Instituto de Telecomunicações, are inviting you to the talk entitled “Wave-Controlled Metasurface-based Reconfigurable Intelligence Surfaces”, which will be presented online by Professor Ender Ayanoglu of the University of California Irvine.

Reconfigurable Intelligent Surfaces (RISs) are programmable metasurfaces that can adaptively steer received electromagnetic energy in desired directions by employing controllable phase-shifting cells. Among other uses, an RIS can modify the propagation environment to provide wireless access to user locations that are not otherwise reachable by a base station. Alternatively, an RIS can steer the waves away from particular locations in space, to eliminate interference and allow for the co-existence of the wireless network with other types of fixed wireless services (e.g., radars, unlicensed radio bands, etc.). The novel approach presented in this talk is a wave-controlled architecture that properly accounts for the maximum possible change in the local reflection phase that can be achieved by adjacent RIS elements. It obviates the need for dense wiring and signal paths that would be required for individual control of every RIS element, and thus offers a substantial reduction in the required hardware. We specify this wave-controlled RIS architecture in detail and discuss signal processing and machine learning methods that exploit it in both point-to-point and multi-cell MIMO systems. Such implementations can lead to a dramatic improvement in next-generation wireless, radar, and navigation systems where RIS finds wide applications. They have the potential to improve the efficiency of spectrum utilization and coexistence by orders of magnitude.

Ender Ayanoglu has been a Professor in the Department of Electrical Engineering and Computer Science, University of California, Irvine, Irvine, CA, where he served as the Center for Pervasive Communications Director and Computing and held the Conexant-Broadcom Endowed Chair. His past accomplishments include the invention of the 56K modems, the characterization of wavelength conversion gain in Wavelength Division Multiplexed (WDM) systems, and diversity coding, a technique for link failure recovery in communication networks employing erasure coding introduced in 1990, prior to the publication of the first papers on network coding. He served as the Editor-in-Chief of the IEEE Transactions on Communications from 2004 to 2008. From January 2015 until December 2016, he served as the Editor-in-Chief of the IEEE Journal on Selected Areas in Communications - Series on Green Communications and Networking.

When: 04 January of 2023, from 4:00 pm to 6:00 pm (UTC+00:00) Lisbon time.

Hosts: Luís Bernardo & Daniel Corujo

Participation through the Zoom URL:

Meeting ID: 921 0531 3378
Password: 582517 More Information..

Globecom 2022 - Workshop on Sustainable Future Ultra-Dense Networks

on 04-12-2022

... The Workshop on Sustainable Future Ultra-Dense Networks will be held, as a hybrid event, in the scope of Globecom 2022 - IEEE Global Communications Conference, with the theme "Accelerating the Digital Transformation through Smart Communications", on December 4-8, in Rio de Janeiro, Brazil.

The Workshop will focus on Sustainable Future Ultra-Dense Networks (FutureUDNs) including vehicular environments, smart cities, and buildings, and envisage the most important components in future networks: frequency spectrum usage and underlying Radio Access Network (RAN) techniques. FutureUDNs consider aspects such as applying intelligence-based algorithms for energy-efficient communication systems, radio resource management, optimization of cellular and cell-free networks, as well as software-defined networking. Challenges encompass research on dual connectivity, carrier aggregation, and shared spectrum while exploring unlicensed spectrum. Future wireless networks will mainly consider centralized solutions, where virtualized-RANs are implemented to enhance 5G New Radio sustainability. Beyond 5G networks are being designed for a broad range of usage: enterprises and future mission-critical applications, virtual/augmented reality, and enhanced wireless usage for many verticals.

The Workshop on Sustainable Future Ultra-Dense Networks aims to bring researchers together to discuss the opportunities and challenges in the research, design, and optimization of future mobile and wireless networks that comprise UDNs, especially energy efficiency and business-oriented strategies. This event will focus on, but will not be limited to, the following subjects of interest:

(1) Use cases that include terrestrial and flying heterogeneous networks with small cells supporting URLLC, mMTC, and eMBB, e.g., in dense public and industrial environments;
(2) RAN techniques in future cellular and cell-free massive MIMO networks;
(3) Case studies that consider a diverse set of services, enabling sustainable cities and infrastructures: e.g., safe autonomous transportation, reliable access to remote health care;
(4) Radio resource management and capacity enhancement;
(5) Challenges in the optimization of networks with flying UAVs;
(6) Field trials and test beds in real setups, e.g., with Open RAN (and eCPRI) solutions, with Remote Units and UEs;
(7) Innovative models delivered through virtualization principles;
(8) Next-Generation Wi-Fi (IEEE 802.11be/ax/ay) and interworking with 5G/LTE;
(9) Machine learning techniques to reach sustainable and efficient spectrum management solutions;
(10) Application of business planning strategies to evaluate the radio technologies and their deployments for innovative services and products;
(11) Aspects of privacy and security;
(12) Optimization of energy efficiency and sustainable techno-economic issues;
(13) Contribution to public policies for spectrum management;
(14) Standards and standardization activities.

Important dates:
Paper Submission Deadline: 15 July 2022
Paper Acceptance Notification: 1 September 2022
Camera-Ready: 1 October 2022

Workshop organizers:
Fernando J. Velez (Instituto de Telecomunicações and Universidade da Beira Interior, Portugal,, Ana Garcia Armada (Universidad Carlos III de Madrid, Spain,, Pedro Sebastião (Instituto de Telecomunicações and ISCTE-IUL, Portugal,, Maria Julia Fernández-Getino García (Universidad Carlos III de Madrid, Spain,, Periklis Chatzimisios (International Hellenic University, Greece, and Christos Masouros (University College London, United Kingdom,

Further info on the conference's page:

For the submission details, please download the CfP brochure:
More Information..