Filters








80 Hits in 3.8 sec

Fault Adaptive Routing in Metasurface Controller Networks [article]

Taqwa Saeed, Constantinos Skitsas, Dimitrios Kouzapas, Marios Lestas, Vassos Soteriou, Anna Philippou, Sergi Abadal, Christos Liaskos, Loukas Petrou, Julius Georgiou, Andreas Pitsillides
2018 arXiv   pre-print
In this paper, we present work in progress towards the development of fault-tolerant routing mechanisms for the chosen architecture.  ...  HyperSurfaces are a merge of structurally reconfigurable metasurfaces whose electromagnetic properties can be changed via a software interface, using an embedded miniaturized network of controllers, thus  ...  In addition, the limited adaptability of the network topology renders the deployment of traditional fault tolerant routing techniques infeasible.  ... 
arXiv:1810.06329v1 fatcat:n6oy25oqhrgxte2elyynsbheri

Toward Fault-Tolerant Deadlock-Free Routing in HyperSurface-Embedded Controller Networks [article]

Taqwa Saeed, Vassos Soteriou, Christos Liaskos, Andreas Pitsillides, Marios Lestas
2020 arXiv   pre-print
With the HSF controllers, interconnected in an irregular, near-Manhattan geometry, we propose a robust, deterministic Fault-Tolerant (FT), deadlock- and livelock-free routing protocol where faults are  ...  HyperSurfaces (HSFs) consist of structurally reconfigurable metasurfaces whose electromagnetic properties can be changed via a software interface, using an embedded miniaturized network of controllers.  ...  Fig. 2 : 2 A 5 × 5 HSF-embedded controller network topology with two packetized directives routing scenarios shown in solid blue and dotted orange links; the ACK path is shown in solid green. effectiveness  ... 
arXiv:2011.04407v1 fatcat:bbnujopo3jfz7mdtswyz4lqhpm

Toward the Realization of a Programmable Metasurface Absorber Enabled by Custom Integrated Circuit Technology

K. M. Kossifos, L. Petrou, G. Varnava, A. Pitilakis, O. Tsilipakos, F. Liu, P. Karousios, A. C. Tasolamprou, M. Seckel, D. Manessis, N. V. Kantartzis, D.-H. Kwon (+2 others)
2020 IEEE Access  
Furthermore, the ASICs populate the back of the metasurface to form a mesh network to enable programmability.  ...  The ASIC is used to provide an adaptive complex impedance load to each of the metasurface unit cells.  ...  ACKNOWLEDGMENT The authors like to thank the partners in the VISORSURF consortium, Prof. S. Tretyakov, M. S. Mirmoosa, C. Liaskos, Prof. M. Kafesaki, and Prof A. Pitsilides for useful discussions.  ... 
doi:10.1109/access.2020.2994469 fatcat:kpuu65xq45cmvctua3n5xwq2fm

Programmable Metamaterials for Software-Defined Electromagnetic Control: Circuits, Systems, and Architectures

Sergi Abadal, Tie-Jun Cui, Tony Low, Julius Georgiou
2020 IEEE Journal on Emerging and Selected Topics in Circuits and Systems  
In this paper, recent progress in the field of programmable metasurfaces is reviewed, cutting across layers from the application down to the device and technology levels.  ...  Index Terms-Programmable metamaterials, programmable metasurfaces, software-defined electromagnetic control, cyberphysical systems, embedded digital systems.  ...  Essentially, the metasurface receives reconfiguration requests that are disseminated to the internal control logic via chip-to-chip interconnects and routing logic [86] , [87] .  ... 
doi:10.1109/jetcas.2020.2976165 fatcat:qsne5sl26veshbzstb6q4w6tgi

Error Analysis of Programmable Metasurfaces for Beam Steering

Hamidreza Taghvaee, Albert Cabellos-Aparicio, Julius Georgiou, Sergi Abadal
2020 IEEE Journal on Emerging and Selected Topics in Circuits and Systems  
This paradigm shift, however, comes with a non-trivial increase of the complexity of the metasurfaces that will pose new reliability challenges stemming from the need to integrate tuning, control, and  ...  To derive the error model, the causes and potential impact of faults are identified and discussed qualitatively.  ...  Another example would relate to the loss of connectivity at the network: faults in a few interconnects can leave an entire region of the metasurface isolated and stuck in an old state [63] . • Aligned  ... 
doi:10.1109/jetcas.2020.2970077 fatcat:ngn3cokil5envfkuagr2r3daeu

IEEE Access Special Section Editorial: Communications in Harsh Environments

Qilian Liang, Tariq S. Durrani, Xin Wang, Wei Wang, Jinhwan Koh, Qiong Wu
2021 IEEE Access  
Energy-efficient routing in heterogeneous wireless sensor networks (HWSNs) is useful for prolonging network lifetime and energy conservation.  ...  In the article ''Spectral efficiency improvement and power control optimization of massive MIMO networks,'' by Zhang et al., spectral efficiency (SE) and power control of cell-free massive MIMO networks  ... 
doi:10.1109/access.2021.3077176 fatcat:nnggukisyrdill733z7twkfk5e

A novel communication paradigm for high capacity and security via programmable indoor wireless environments in next generation wireless systems

Christos Liaskos, Shuai Nie, Ageliki Tsioliaridou, Andreas Pitsillides, Sotiris Ioannidis, Ian Akyildiz
2019 Ad hoc networks  
HyperSurfaces are a novel class of metasurfaces whose structure and, hence, electromagnetic behavior can be altered and controlled via a software interface.  ...  This paper contributes the software-programmable wireless environment, consisting of several HyperSurface tiles (programmable metasurfaces) controlled by a central server.  ...  A HyperSurface tile is a planar, intelligent structure that incorporates networked hardware control elements and adaptive meta-atom metasurfaces.  ... 
doi:10.1016/j.adhoc.2018.11.001 fatcat:okj2k7cozvfjphl7gkle4rf32q

Realizing Wireless Communication through Software-defined HyperSurface Environments [article]

Christos Liaskos, Shuai Nie, Ageliki Tsioliaridou, Andreas Pitsillides, Sotiris Ioannidis, Ian Akyildiz
2018 arXiv   pre-print
HyperSurfaces are a novel class of metasurfaces whose structure and, hence, electromagnetic behavior can be altered and controlled via a software interface.  ...  Multiple networked tiles coat indoor objects, allowing fine-grained, customizable reflection, absorption or polarization overall.  ...  A HyperSurface tile is a planar, rectangular structure that incorporates networked hardware control elements and adaptive meta-atom metasurfaces.  ... 
arXiv:1805.06677v1 fatcat:ayr5rqqccjekfeyc2rs4vzwf4i

A Vision to Smart Radio Environment: Surface Wave Communication Superhighways [article]

Kai-Kit Wong, Kin-Fai Tong, Zhiyuan Chu, Yangyang Zhang
2020 arXiv   pre-print
emerged is to pursue a smart radio environment by using software-defined materials or programmable metasurfaces for establishing favourable propagation conditions.  ...  One important technology which will be discussed is a software-controlled fluidic waveguiding architecture that permits dynamic creation of high-throughput data highways.  ...  The pathways are software-controlled to adapt to the radio environment and always provide the best routes requiring the least power consumption to the UEs free of interference, thanks to the extraordinary  ... 
arXiv:2005.14082v1 fatcat:3bftf75qp5hi3cvajouzes3s2a

Machine–learning-enabled metasurface for direction of arrival estimation

Min Huang, Bin Zheng, Tong Cai, Xiaofeng Li, Jian Liu, Chao Qian, Hongsheng Chen
2022 Nanophotonics  
For certain incident signals, a tunable metasurface is controlled in sequence, generating a series of field intensities at the single receiving probe.  ...  The reported strategy opens a feasible route for intelligent DOA detection in full space and wide band.  ...  Introduction As a key technology in adaptive arrays, the direction of arrival (DOA) is widely used in mobile communication, radar, sonar, navigation, seismic detection, and medical imaging [1] [2] [3]  ... 
doi:10.1515/nanoph-2021-0663 fatcat:vviefa2jnvb2jpbosayfrkgxui

Extremum Seeking Control for Beam Steering using Hypersurfaces

Nouman Ashraf, Marios Lestas, Taqwa Saeed, Hamidreza Taghvaee, Sergi Abadal, Andreas Pitsillides, Christos Liaskos
2020 2020 IEEE International Conference on Communications Workshops (ICC Workshops)  
In addition, a discrete time implementation is considered, investigating its limitations as we increase the sampling time while also characterizing the traffic within the controller network.  ...  Index Terms-Beam steering, extremum seeking control, mm-wave and terahertz communication, intelligent metasurface, HyperSurface.  ...  Here, we assume the XY algorithm, which works effectively in the absence of faults and consider unicast routing one-by-one to the corresponding controllers.  ... 
doi:10.1109/iccworkshops49005.2020.9145206 dblp:conf/icc/AshrafLSTAPL20 fatcat:b5nznq3xfjc2xf3o6il6ld2o6a

Towards Smart Wireless Communications via Intelligent Reflecting Surfaces: A Contemporary Survey [article]

Shimin Gong, Xiao Lu, Dinh Thai Hoang, Dusit Niyato, Lei Shu, Dong In Kim, Ying-Chang Liang
2020 arXiv   pre-print
To exploit the performance gain, we discuss the joint optimization of the IRS's phase control and the transceivers' transmission control in different network design problems, e.g.  ...  Conventionally, the network optimization has been limited to transmission control at two endpoints, i.e., end users and network controller.  ...  To ensure reliable communications among controllers embedded in the metasurface structure, the authors in [50] adopt the traditional Network-on-Chip (NoC) methodologies and develop two fault adaptive  ... 
arXiv:1912.07794v2 fatcat:r76gsjgpovhhbgexlkdd3y5pqu

Complex Systems: A Communication Networks Perspective towards 6G

Charalampos Sergiou, Marios Lestas, Pavlos Antoniou, Christos Liaskos, Andreas Pitsillides
2020 IEEE Access  
In Section IV we present the Complex Adaptive Systems (CAS) Properties while in Section V we present specific network modeling paradigms.  ...  From a communication networks perspective, the key challenge is to learn how to design such networks that can self-organize, self-adapt and optimize their interactions and functions, in a continuous and  ...  For example, in the physical layer for channel precoding, in network layer for traffic control, for fault prediction, authentication etc [9] .  ... 
doi:10.1109/access.2020.2993527 fatcat:ee25q7voora2jkn373yemnzmyy

Survey on Terahertz Nanocommunication and Networking: A Top-Down Perspective [article]

Filip Lemic, Sergi Abadal, Wouter Tavernier, Pieter Stroobant, Didier Colle, Eduard Alarcón, Johann Marquez-Barja, Jeroen Famaey
2021 arXiv   pre-print
As it is expected that these trends will continue in the future, we see it beneficial to summarize the current status in these research domains.  ...  Recent developments in nanotechnology herald nanometer-sized devices expected to bring light to a number of groundbreaking applications.  ...  [136] propose two fault-adaptive XY routing mechanisms (one avoiding loops, and another maximizing success delivery probability) enabling communication between a network of controllers in the context  ... 
arXiv:1909.05703v3 fatcat:wbc5fggjvngojfbxqv24p4kp6i

Survey on Terahertz Nanocommunication and Networking: A Top-Down Perspective

Filip Lemic, Sergi Abadal, Wouter Tavernier, Pieter Stroobant, Didier Colle, Eduard Alarcon, Johann Marquez-Barja, Jeroen Famaey
2021 IEEE Journal on Selected Areas in Communications  
As it is expected that these trends will continue in the future, we see it beneficial to summarize the current status in these research domains.  ...  Recent developments in nanotechnology herald nanometer-sized devices expected to bring light to a number of groundbreaking applications.  ...  [136] propose two fault-adaptive XY routing mechanisms (one avoiding loops, and another maximizing success delivery probability) enabling communication between a network of controllers in the context  ... 
doi:10.1109/jsac.2021.3071837 fatcat:tvcbvr7u3jeqbh2yoaygywjelq
« Previous Showing results 1 — 15 out of 80 results