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Kostas Christodoulopoulos –
Assistant Professor Department of Informatics and Telecommunications Room: B19 Mail: kchristodou at di dot uoa dot gr Tel: +30 210 727 5313 |
Full list of publications
Journal papers
[J1] T. Pfeiffer, P. Dom, S. Bidkar, F. Fredricx, K. Christodoulopoulos, R. Bonk,
"PON going beyond FTTH",
IEEE/OSA Journal of Optical Communications and Networking, 2022. Invited
[J2]
W. Lautenschlaeger, F. Frick, K. Christodoulopoulos, T. Henke,
"A Scalable Factory Backbone for
Multiple Independent Time-Sensitive Networks",
Elsevier Journal of Systems Architecture, 2021.
[J3]
A. Mahajan,
K. Christodoulopoulos, R. Martínez, R. Muñoz, S. Spadaro, "Impact of Multi-Vendor
Transponders Performance on Design Margin in Optical Networks",
IEEE Access 9, 2021.
[J4]
F. Locatelli,
K. Christodoulopoulos, M.S. Moreolo, J.M. Fabrega, L.
Nadal, S. Spadaro, "Spectral processing techniques for
efficient monitoring in optical networks”,
IEEE/OSA Journal of Optical Communications and Networking 13 (7), 2021.
[J5]
S. Bigo, N. Benzaoui, K. Christodoulopoulos, R. Miller, W. Lautenschlaeger, F. Frick, "Dynamic deterministic digital
infrastructure for time-sensitive applications in factory floors",
IEEE Journal of Selected Topics in Quantum Electronics, 2021. Invited
[J6] A. Mahajan, K. Christodoulopoulos, R. Martínez, R. Muñoz, S.
Spadaro, "Quality
of transmission estimator retraining for dynamic optimization in optical
networks", IEEE/OSA Journal of Optical Communications and Networking
13 (4), 2021.
[J7] K. Tokas, G. Patronas, C. Spatharakis, P. Bakopoulos, A.
Kyriakos, G Landi, E. Zahavi, K. Christodoulopoulos, M. Aziz, R. Pitwon, D. Gallico, D. Reisis, E.
Varvarigos, H. Avramopoulos "End-to-End Real-Time Demonstration
of the Slotted, SDN-Controlled NEPHELE Optical Datacenter Network",
Photonics 7 (2), 2020.
[J8] A. Mahajan, K. Christodoulopoulos, R. Martínez, S. Spadaro, R.
Muñoz, "Modeling
EDFA gain ripple and filter penalties with machine learning for accurate QOT
estimation", IEEE/OSA Journal of Lightwave Technology, 38 (9),
2616-2629, 2020.
[J9] F. Locatelli, K. Christodoulopoulos, M. Svaluto
Morelo, J. M. Fabrega, S. Spadaro, “Machine
Learning-Based in-band OSNR Estimation from Optical Spectra“, IEEE Photonic
Technology Letters (PTL), 2019.
[J10]
K. Christodoulopoulos,
C. Delezoide, N. Sambo, A. Kretsis, I.
Sartzetakis, A. Sgambelluri, N. Argyris, G. Kanakis, P. Giardina, G. Bernini,
D. Roccato, A. Percelsi, R.
Morro, H. Avramopoulos, P. Castoldi, P. Layec, S. Bigo, “Toward efficient, reliable, and
autonomous optical networks: the ORCHESTRA solution”,
IEEE/OSA Journal of Optical Communications and Networking 2019. Invited
[J11]
N. Sambo, K. Christodoulopoulos,
N. Argyris, P. Giardina, C. Delezoide, D. Roccato,
A. Percelsi, R. Morro, A. Sgambelluri, A. Kretsis, G.
Kanakis, G. Bernini, E. Varvarigos, P. Castoldi, “Field Trial: Demonstrating
Automatic Reconfiguration of Optical Networks based on Finite State Machine”,
IEEE/OSA, Journal of Lightwave Technology, 2019. Invited
[J12]
C. Delezoide, K. Christodoulopoulos, A. Kretsis, N. Argyris,
G. Kanakis, A. Sgambelluri, N. Sambo, P. Giardina, G. Bernini, D. Roccato, A. Percelsi, R. Morro,
H. Avramopoulos, E Varvarigos, P. Castoldi, P. Layec, S. Bigo, “Marginless
Operation of Optical Networks”, IEEE/OSA, Journal of Lightwave
Technology, 2019. Invited
[J13]
I.
Sartzetakis, K. Christodoulopoulos, E. Varvarigos, “Accurate
quality of transmission estimation with machine learning”, IEEE/OSA,
Journal of Optical Communications and Networking, 2019.
[J14]
N. Sambo, K.
Christodoulopoulos, N. Argyris, P. Giardina, C. Delezoide, A. Sgambelluri, A. Kretsis, G.
Kanakis, F. Fresi, G. Bernini, H. Avramopoulos, E. Varvarigos, P. Castoldi, “Experimental Demonstration of a
Fully Disaggregated and Automated White Box Comprised of Different Types of
Transponders and Monitors”, IEEE/OSA Journal of Lightwave
Technology, 2019.
[J15]
A. Siokis, K. Christodoulopoulos, E. Varvarigos,
"Layout
model for optical interconnects based on ?-routing grids and topology
embeddings", IEEE/OSA, Journal of Optical Communications and
Networking, 2018.
[J16]
I.
Sartzetakis, N. Sambo, K. Christodoulopoulos, P. Castoldi, E. Varvarigos, "Exploiting
spectrum sharing for soft failure recovery", IEEE/OSA, Journal of
Optical Communications and Networking, 2018.
[J17]
G. Landi, M.
Capitani, A. Kretsis, K. Kontodimas, P. Kokkinos, D. Gallico, M. Biancani, K.
Christodoulopoulos, E. Varvarigos, "Inter-domain
optimization and orchestration for optical datacenter networks",
IEEE/OSA, Journal of Optical Communications and Networking, 2018.
[J18]
I. Gravalos, P. Makris, K. Christodoulopoulos, E. Varvarigos, "Efficient
Network Planning for Internet of Things with QoS Constraints", IEEE
Journal of Internet of Things, 5 (5), 2018.
[J19]
P. Bakopoulos, K. Christodoulopoulos, G. Landi, M. Aziz, E.
Zahavi, D. Gallico, R. Pitwon,
K. Tokas, I. Patronas, M. Capitani, C. Spatharakis, K. Yiannopoulos, K. Wang, K. Kontodimas, I. Lazarou, P. Wieder, D. Reisis, E. Varvarigos, M. Biancani, H.
Avramopoulos, "NEPHELE:
An End-to-End Scalable and Dynamically Reconfigurable Optical Architecture for
Application-Aware SDN Cloud Data Centers", IEEE Communications
Magazine, 2018.
[J20]
P.
Papanikolaou, K. Christodoulopoulos, E. Varvarigos,
"Optimization
Techniques for Incremental Planning of Multilayer Elastic Optical Networks",
IEEE/OSA Journal of Optical Communications and Networking, 2018.
[J21]
I. Sartzetakis,
K. Christodoulopoulos, E. Varvarigos, "Cross-Layer
Adaptive Elastic Optical Networks", IEEE/OSA Journal of Optical
Communications and Networking (JOCN), 2018. Invited
[J22]
P. Soumplis,
K. Christodoulopoulos, M. Quagliotti, A. Pagano, E. Varvarigos, "Multi-Period
Planning With Actual Physical and Traffic Conditions", IEEE/OSA
Journal of Optical Communications and Networking (JOCN), 2018. Invited
[J23]
K.
Christodoulopoulos, K. Kontodimas, A. Siokis, K. Yiannopoulos, E. Varvarigos,
"Efficient
bandwidth allocation in the NEPHELE optical/electrical datacenter interconnect",
IEEE/OSA Journal of Optical Communications and Networking (JOCN), 2017.
[J24]
P. Soumplis,
K. Christodoulopoulos, M. Quagliotti, A. Pagano, E. Varvarigos, "Network
Planning with Actual Margins", IEEE/OSA Journal of Lightwave
Technology (JLT), 2017.
[J25]
A. Siokis, K. Christodoulopoulos, N. Pleros,
E. Varvarigos, "Electro-optic
switches based on space switching of multiplexed WDM signals: Blocking vs
non-blocking design trade-offs", Elsevier Optical Switching and Networking
25, pp. 40-56, 2017.
[J26]
P. Maniotis, N. Terzenidis, A. Siokis, K. Christodoulopoulos, E. Varvarigos,
M. Immonen, H. J. Yan, L. X. Zhu, K. Hasharoni, R. Pitwon, K. Wang, N. Pleros,
"Application-oriented
On-board Optical Technologies for HPCs", IEEE/OSA Journal of Lightwave
Technology (JLT), 2017.
[J27]
P.
Papanikolaou, K. Christodoulopoulos, E. Varvarigos,
"Joint
multi-layer survivability techniques for IP-over-elastic-optical-networks",
IEEE/OSA Journal of Optical Communications and Networking (JOCN), 9 (1), 2017.
[J28]
A. Siokis, K. Christodoulopoulos, E. Varvarigos,
“Multipoint
Architectures for On-Board Optical Interconnects”, IEEE/OSA Journal of
Optical Communications and Networking (JOCN), Vol. 8 is. 11, 2016.
[J29]
I.
Sartzetakis, K. Christodoulopoulos, C. Tsekrekos, D. Syvridis,
E. Varvarigos, “Quality
of transmission estimation in WDM and elastic optical networks accounting for
space–spectrum dependencies”, IEEE/OSA Journal of Optical Communications
and Networking (JOCN), Vol. 8, is. 9, 2016
[J30]
M.S. Moreolo, J.M. Fabrega, L. Martin, K. Christodoulopoulos, E.
Varvarigos, J. P. F. Palacios, “Flexgrid
Technologies Enabling BRAS Centralization in MANs”, IEEE/OSA Journal
of Optical Communications and Networking (JOCN), Vol. 8, is. 7, 2016
[J31]
V. Gkamas, K. Christodoulopoulos, E. Varvarigos,
"Energy-minimized design of IP over flexible optical
networks", Wiley International Journal of Communication Systems, 2015.
[J32]
V. Gkamas, K. Christodoulopoulos, E. Varvarigos,
"A joint multi-layer planning algorithm for IP over
flexible optical networks", IEEE/OSA Journal of Lightwave Technology
(JLT), Vol. 33, Is. 14, 2015.
[J33]
K.
Christodoulopoulos, C. Papageorgiou, E. Varvarigos, "Minimizing
Expected Transmissions Multicast in Wireless Multihop
Networks", Springer International Journal of Wireless Information
Networks: Vol. 22, Is. 3, pp. 205-219, 2015.
[J34]
P.
Papanikolaou, P. Soumplis, K. Manousakis, G. Papadimitriou, G. Ellinas, K.
Christodoulopoulos, E. Varvarigos, "Minimizing Energy and Cost in fixed-grid and flex-grid
networks", IEEE/OSA Journal of Optical Communications and Networking
(JOCN), Vol. 7, Is. 4, 2015.
[J35]
K.
Christodoulopoulos, D. Lugones, K. Katrinis, M. Rufinni, D. O'Mahony, "Performance Evaluation of a Hybrid Optical/Electrical
Interconnect", IEEE/OSA Journal of Optical Communications and
Networking (JOCN), Vol. 7, Is. 3, 2015.
[J36]
P. Soumplis,
K. Christodoulopoulos, E. Varvarigos, "Dynamic Connection Establishment and Network
Re-optimization in Flexible Optical Networks", Invited, Springer
Photonic Network Communications (PNC), 2015.
[J37]
A. Kretsis, P.
Kokkinos, K. Christodoulopoulos, T. Varvarigou, E. Varvarigos, "Mantis: Cloud-based optical network planning and
operation tool", Elsevier Compute Networks, Vol. 77, pp. 153-168,
2015.
[J38]
E. Varvarigos, K. Christodoulopoulos, "Algorithmic Aspects in Planning Fixed and Flexible
Optical Networks With Emphasis on Linear Optimization and Heuristic
Techniques", Invited, IEEE/OSA Journal Lightwave Technology (JLT), Vol
32, Is. 4, pp. 681-693, 2014.
[J39]
A Kretsis, K
Christodoulopoulos, P Kokkinos, E Varvarigos, "Planning
and operating flexible optical networks: Algorithmic issues and tools",
IEEE Communications Magazine, Vol. 52, Is. 1, pp. 61-69, 2014.
[J40]
K.
Christodoulopoulos, P. Soumplis, E. Varvarigos, "Planning flexible optical networks under physical layer
constraints", IEEE/OSA Journal of Optical Communications and
Networking, (JOCN), Vol. 5, Is. 11, pp. 1296-1312, 2013.
[J41]
K.
Christodoulopoulos, K. Katrinis, M. Ruffini, D. O'
Mahony, "Tailoring the Network to the Problem: Topology
Configuration in Hybrid EPS/OCS Interconnects", Willey Interscience Concurrency and Computation: Practice and
Experience, Vol. 25, Is. 17, pp. 2412-2432, 2013.
[J42]
K.
Christodoulopoulos, I. Tomkos, E. Varvarigos,
"Time-Varying Spectrum Allocation Policies in Flexible
Optical Networks", IEEE Journal on Selected Areas in Communication
(JSAC), Vol 31, Is. 1, pp. 13-25, 2013.
[J43]
E. Palkopoulou, M. Angelou, D. Klonidis,
K. Christodoulopoulos, A. Klekamp, F. Buchali, E. Varvarigos, I. Tomkos, "Quantifying
spectrum, cost, and energy efficiency in fixed-grid and flex-grid networks",
IEEE/OSA Journal of Optical Communications and Networking, Nov, 2012 [Invited]
[J44]
K.
Christodoulopoulos, K. Manousakis, E. Varvarigos,
"Reach
Adapting Algorithms for Mixed Line Rate WDM Transport Networks",
IEEE/OSA Journal of Lightwave Technology, Vol 29, Is. 21, 2011.
[J45]
K.
Christodoulopoulos, P. Kokkinos, E. Varvarigos,
"Indirect
and Direct Multicost Algorithms for Online
Impairment-Aware RWA", IEEE/ACM Transactions on Networking, Vol 19,
Is. 6, 2011.
[J46]
K.
Christodoulopoulos, I. Tomkos, E.Varvarigos,
"Elastic Bandwidth Allocation in Flexible OFDM-based Optical
Networks", IEEE/OSA Journal of Lightwave Technology, 2011.
[J47]
P. Kokkinos,
K. Christodoulopoulos, E. Varvarigos, "Efficient
Data Consolidation in Grid Networks", Future Generation Computer
Systems, Elsevier, Vol. 27, Is. 2, 2011.
[J48]
K.
Christodoulopoulos, P. Kokkinos, K. Manousakis, E. Varvarigos,
"Impairment Aware RWA in optical networks: over-provisioning or
cross optimization?", Journal of Networks, Special Issue on
All-Optical Routing, Vol. 5, No. 11, 2010.
[J49]
K.
Christodoulopoulos, K. Manousakis, E. Varvarigos,
"Offline
Routing and Wavelength Assignment in Transparent WDM Networks",
IEEE/ACM Transactions on Networking, Vol. 18, Is. 5, 2010.
[J50]
K.
Manousakis, P. Kokkinos, K. Christodoulopoulos, E. Varvarigos,
"Joint
Online Routing, Wavelength Assignment and Regenerator Allocation in Translucent
Optical Networks", IEEE/OSA Journal of Lightwave Technology, Vol. 28,
is. 8, pp. 1152-1163, Apr. 2010.
[J51]
T. Stevens,
M. De Leenheer, C. Develder, B. Dhoedt, K.
Christodoulopoulos, P. Kokkinos, E. Varvarigos,
"Multi-Cost
Job Routing and Scheduling in Grid Networks", Future Generation
Computer Systems, Elsevier, Vol. 25, Is. 8, pp. 912-925, Sept. 2009.
[J52]
K.
Manousakis, K. Christodoulopoulos, E. Kamitsas, I. Tomkos, E. Varvarigos, "Offline
Impairment-Aware Routing and Wavelength Assignment Algorithms in Translucent
WDM Optical Networks", IEEE/OSA Journal of Lightwave Technology, Vol.
27, Is. 12, pp. 1866 - 1877, June, 2009.
[J53]
K.
Christodoulopoulos, K. Manousakis, E. Varvarigos, M.
Angelou, "Considering Physical Layer Impairments in Offline RWA",
IEEE Network Magazine, Vol. 23, Is. 3, pp. 26-33, 2009.
[J54]
K.
Christodoulopoulos, V. Sourlas, I. Mpakolas, E. Varvarigos, "A
Comparison of Centralized and Distributed Meta-Scheduling Architectures for
Computation and Communication Tasks in Grid Networks", Computer
Communications, Elsevier, Vol. 32, Is. 7-10, pp. 1172-1184, May 2009.
[J55]
E. Varvarigos, V. Sourlas, K.
Christodoulopoulos, "Routing
and Scheduling Connections in Networks that Support Advance Reservations",
Computer Networks, Elsevier, Vol. 52, no. 15, pp. 2988-3006, Oct. 2008.
[J56]
K.
Christodoulopoulos, E. Varvarigos, K. Vlachos, "A new Burst
Assembly Scheme based on the Average Packet Delay and its Performance for TCP
Traffic", Journal of Optical Switching and Networking, Elsevier, Vol.
4, no. 3-4, pp. 200-212, Nov. 2007.
[J57]
R. V. Caenegem, D. Colle, M. Pickavet,
P. Demeester, K. Christodoulopoulos, K. Vlachos, E. Varvarigos,
L. Stampoulidis, D. Roccato,
R. Vilar, "The Design of an All-Optical Packet-Switching Network",
IEEE Communications Magazine, Vol. 45, no. 11, pp. 52 - 61, Nov. 2007.
[J58]
K.
Christodoulopoulos, V. Gkamas, E. Varvarigos,
"Statistical Analysis and Modeling of Jobs in a Grid Environment",
Journal of Grid Computing, Springer, Vol. 6, pp. 77-101, Nov. 2007.
[J59]
K. Vlachos,
E. Van Breusegem , K. Christodoulopoulos, D. Colle ,
K. Ramantas, P. Demeester, "Constrained and
Unconstrained Overspill Routing in Optical Networks: A Detailed Performance
Evaluation", Photonic Network Communications, Springer, Vol. 13, No.
3, pp. 227-240, June 2007.
[J60]
J. Aracil, N. Akar, S. Bjornstad, M. Casoni,
K. Christodoulopoulos, D. Careglio, J. Fdez-Palacios, C. Gauger, O. Gonzalez de Dios, G. Hu, E. Karasan, M. Klinkowski, D.
Morato, R. Nejabati, H. Overby , C. Raffaelli, D. Simeonidou,
N. Stol, G. Tosi-Beleffi,
K. Vlachos, "Research in Optical Burst Switching within the e-Photon/ONe Network of Excellence", Journal of Optical
Switching and Networking, Elsevier, Vol. 4, Is. 1, pp. 1-19, Feb. 2007.
[J61]
K.
Manousakis, V. Sourlas, K. Christodoulopoulos, E. A. Varvarigos, K. Vlachos, "A Bandwidth
Monitoring Mechanism Enhancing SNMP to Record Timed Resource Reservations",
Journal of Network and Systems Management, Springer, Vol. 14, No. 4, pp.
583-597, Dec 2006.
[J62]
E. Kehayas, K. Vyrsokinos,L. Stampoulidis, K. Christodoulopoulos, K. Vlachos, H.
Avramopoulos "ARTEMIS: A 40 Gb/s All-Optical Self-Routing Node and Network
Architecture employing Asynchronous Bit and Packet-Level Optical Signal
Processing", IEEE/OSA Journal of Lightwave Technology, Vol. 24, no.8,
pp. 2967-2977, Aug. 2006.
[J63]
K.
Christodoulopoulos, L. SpellE>Stampoulidis,
E. Kehayas, K. Vlachos, E. Varvarigos,
"Efficient burst
reservation protocol: a hybrid signaling protocol for efficient burst-level
reservations and quality-of-service differentiation in optical burst switching
networks", OSA Journal of Optical Networking, Vol 5, Is. 3, 2006.
Conferences
[C1]
S. Bidkar, K.
Christodoulopoulos, T. Pfeiffer, R. Bonk, “Evaluating
Bandwidth Efficiency and Latency of Scheduling Schemes for 5G Fronthaul Over
TDM-PON”, European Conference on Optical Communications (ECOC), 2022
[C2]
K.
Christodoulopoulos, S. Bidkar, W. Lautenschlaeger, T.
Pfeiffer, R. Bonk, "Demonstration
of Industrial-grade Passive Optical Network", Optical Fiber
Communication Conference (OFC), 2022
[C3]
A. Mahajan,
K. Christodoulopoulos, R. Martínez, R. Muñoz, S. Spadaro, "Adaptive
and iterative QoT estimator retraining for launch
power optimization", Optical Fiber Communications Conference (OFC),
2021
[C4]
F. Locatelli,
K. Christodoulopoulos, J.M. Fàbrega, M.S. Moreolo, L. Nadal, S. Spadaro, "Filter
Features Extraction from Optical Spectra", European Conference on
Optical Communications (ECOC), 2020
[C5]
A. Mahajan,
K. Christodoulopoulos, R. Martínez, S. Spadaro, R. Muñoz, "Modelling
Multi-Vendor Transponders Performance and Optimizing Launch Power”,
European Conference on Optical Communications (ECOC), 2020
[C6]
A. Mahajan,
K. Christodoulopoulos, R. Martinez, S. Spadaro, R. Munoz, "Improving
QoT Estimation Accuracy with DGE Monitoring using
Machine Learning", International Conference on Optical Network Design
and Modeling (ONDM), 2020
[C7]
F. Locatelli,
K. Christodoulopoulos, J.M. Fàbrega, M.S. Moreolo, L. Nadal, S. Spadaro, "Experimental
Demonstration of a Machine Learning-Based in-band OSNR Estimator from Optical
Spectra", International Conference on Optical Network Design and
Modeling (ONDM), 2020
[C8]
K.
Christodoulopoulos, W. Lautenschlaeger, F. Frick, N.
Benzaoui, T. Henke, U. Gebhard, L. Dembeck, A. Lechler, Y. Pointurier,
S. Bigo, "Enabling
the Scalability of Industrial Networks by Independent Scheduling Domains",
Optical Fiber Communications Conference (OFC), 2020
[C9]
A. Mahajan,
K. Christodoulopoulos, R. Martinez, S. Spadaro, R. Munoz, "Modeling
Filtering Penalties in ROADM-based Networks with Machine Learning for QoT Estimation", Optical Fiber Communications
Conference (OFC), 2020
[C10]
A. Mahajan K.
Christodoulopoulos, R. Martinez, S. Spadaro, R. Munoz, "Machine
Learning Assisted EDFA Gain Ripple Modelling for Accurate QoT
Estimation", European Conference on Optical Communication (ECOC),
2019.
[C11]
K. Kontodimas, K. Christodoulopoulos, E. Varvarigos,
"Simplifying
Optical DCN Fabrics with Blocking Space Switching and Wavelength-Constrained
WDM", International Conference on Optical Network Design and Modeling
(ONDM), 2019.
[C12]
[C13]
P. Papanikolaou, K.
Christodoulopoulos, E. Varvarigos, “Joint Multilayer
Planning of Survivable Elastic Optical Networks”, Optical Fiber Communication
Conference (OFC), M2K. 3, 2016.
[C14]
K. Christodoulopoulos, N. Sambo,
E. Varvarigos, “Exploiting Network Kriging for Fault
Localization”, Optical Fiber Communication Conference (OFC), W1B. 5, 2016.
[C15]
I. Sartzetakis, K.
Christodoulopoulos, C. Tsekrekos, D. Syvridis, E. Varvarigos, “Estimating QoT of
Unestablished Lightpaths”, Optical Fiber
Communication Conference (OFC), Tu3F. 2, 2016.
[C16]
A. Di Giglio, A. Pagano, K.
Christodoulopoulos, P. Kokkinos, N. Argyris, C. Spatharakis,
S. Dris, H. Avramopoulos, J-C. Antona, C. Delezoide,
P. Jenneve, J. Pesic, Y. Pointurier,
P. Castoldi, N. Sambo, G. Bernini, G. Carrozzo, E. Varvarigos,
“Cross-layer, dynamic network orchestration, leveraging software-defined
optical performance monitors”, AEIT Italian Conference on Photonics
Technologies (Fotonica), 2015
[C17]
P. Papanikolaou, K.
Christodoulopoulos, E. Varvarigos, "Multilayer flex-grid network planning",
International Conference on Optical Network Design and Modeling, (ONDM), 2015.
[C18]
J.M. Fabrega, M. Moreolo, J.J. Vilchez, K. Christodoulopoulos, E. Varvarigos, J.P. Fernandez-Palacios, "Experimental validation of MTU-BRAS connectivity with DMT
transmission and coherent detection in flexgrid metro
networks using sliceable transceivers", Optical Fiber Communication
conference (OFC), 2015.
[C19]
S. Markou, A. Siokis,
P. Maniotis, K. Christodoulopoulos, E. Varvarigos, N. Pleros, "Performance analysis and layout design of optical blades
for HPCs using the OptoBoard-Sim simulator",
IEEE Optical Interconnects (OI), 2015.
[C20]
V. Gkamas,
K. Christodoulopoulos, E. Varvarigos, "Energy-Aware Multi-layer Flexible Optical Network
Operation", International Conference on Software, Telecommunications
and Computer Networks (SoftCOM), 2015.
[C21]
P. Soumplis, K.
Christodoulopoulos, E. Varvarigos, "Dynamic connection establishment and network
re-optimization in flexible optical networks",International Conference on Optical Network Design and
Modeling (ONDM), 2014.
[C22]
P. Soumplis, P. Papanikolaou, K.
Christodoulopoulos, G. Papadimitriou, E. Varvarigos, "Energy minimization design of fixed-and flex-grid optical
networks", Computer Aided Modeling and Design of Communication Links
and Networks (CAMAD), 2014.
[C23]
K. Yiannopoulos, E. Varvarigos, V. Katopodis, K. Christodoulopoulos, I.
Lazarou, P. Bakopoulos, H. Avramopoulos, D. Klonidis, I. Tomkos, P. Dimos, G.
Heliotis, "Coverage capabilities of a multi-wavelength passive
optical network architecture", Computer Aided Modeling and Design of
Communication Links and Networks (CAMAD), 2014.
[C24]
A. Siokis,
K. Christodoulopoulos, E. Varvarigos, "Laying
out interconnects on optical printed circuit boards", ACM/IEEE
symposium on Architectures for networking and communications systems (ANCS),
2014.
[C25]
M. S. Moreolo,
J.M. Fabrega, F.J. Vilchez, K Christodoulopoulos, E. Varvarigos,
V. Lopez, J.P. Fernandez-Palacios, "Assessment
of Flexgrid Technologies in the MAN for Centralized
BRAS Architecture Using S-BVT", European Conference on Optical
Communication (ECOC), 2014
[C26]
C. Papageorgiou, K.
Christodoulopoulos, N. Doulamis, E. Varvarigos, "On Least Expected Transmissions multicasting in wireless
networks", International Conference on Computing, Networking and
Communications (ICNC), 2014
[C27]
D. Lugones, K. Christodoulopoulos,
K. Katrinis, M. Ruffini, D. O Mahony, M. Collier,
"Accelerating
communication-intensive parallel workloads using commodity optical switches and
a software-configurable control stack", European Conference on
Parallel and Distributed Computing (Europar), 2013.
[C28]
E. Palkopoulou,
I. Stiakogiannakis,D. Klonidis,
K. Christodoulopoulos, E. Varvarigos, O. Gerstel, I. Tomkos, "Dynamic
Cooperative Spectrum Sharing in Elastic Networks", Optical Fiber
Communications Conference (OFC), 2013.
[C29]
K. Christodoulopoulos, P.
Soumplis, E. Varvarigos, "Trading off
Transponders for Spectrum in Flexgrid Networks",
Optical Fiber Communications Conference (OFC), 2013.
[C30]
K. Christodoulopoulos, K. Katrinis, M. Ruffini, D O Mahony, "Topology
Configuration in Hybrid EPS/OCS Interconnects", European Conference on
Parallel and Distributed Computing (Europar), 2012.
[C31]
K. Christodoulopoulos, E. Varvarigos, "Routing and
Spectrum Allocation Policies for Time-Varying Traffic in Flexible Optical
Networks", International Conference on Optical Networking Design and
Modeling (ONDM), 2012.
[C32]
M. Angelou, K. Christodoulopoulos,
D. Klonidis, A. Klekamp, F. Buchali,
E. Varvarigos, I. Tomkos,
"Spectrum,
Cost and Energy Efficiency in Fixed-Grid and Flex-Grid Networks",
Optical Fiber Communications Conference (OFC) 2012.
[C33]
K. Christodoulopoulos, I. Tomkos, E. Varvarigos, "Dynamic
Bandwidth Allocation in Flexible OFDM-based Networks", Optical Fiber
Communications Conference (OFC), 2011.
[C34]
K. Christodoulopoulos, K.
Manousakis, E. Varvarigos, "Adapting
the Transmission Reach in Mixed Line Rates WDM Transport Networks",
International Conference on Optical Network Design and Modeling, (ONDM), 2011.
[C35]
K. Christodoulopoulos, I. Tomkos, E. Varvarigos, "Routing and
Spectrum Allocation in OFDM-based Optical Networks with Elastic Bandwidth
Allocation", IEEE Global Conference on Communications (GLOBECOM),
2010.
[C36]
K. Christodoulopoulos, I. Tomkos, E. Varvarigos, "Spectrally/Bitrate
Flexible Optical Network Planning", European Conference on Optical
Communication (ECOC), 2010.
[C37]
De Groote, K. Manousakis, P.
Kokkinos, D. Colle, M. Pickavet,K.
Christodoulopoulos, E. Varvarigos, P. Demeester,
"Cost comparison of different Translucent Optical Network
Architectures", Conference of Telecommunication, Media and Internet
Techno-Economics (CTTE),2010.
[C38]
P. Kokkinos, K.
Christodoulopoulos, K. Manousakis, E. Varvarigos,
"Multi-Parametric Online RWA based on Impairment Generating
Sources", IEEE Global Conference on Communications (GLOBECOM),
Honolulu, USA, Dec. 2009.
[C39]
K. Christodoulopoulos, K.
Manousakis, M. Angelou, I. Tomkos, E. Varvarigos, "A Multicost Approach to Online Impairment-Aware RWA",
IEEE International Conference on Communications (ICC), Dresden, Germany, June
2009.
[C40]
K. Christodoulopoulos, K.
Manousakis, E Varvarigos, "Cross-layer
Optimization of Static Lightpath Demands in
Transparent WDM Optical Networks", IEEE Information Theory Workshop
(ITW), Volos, Greece, May 2009.
[C41]
K. Manousakis, K.
Christodoulopoulos, E. Varvarigos, "Impairment-Aware
Offline RWA for Transparent Optical Networks", IEEE Conference on
Computer Communications (INFOCOM), Rio De Janeiro, Brazil, April 2009.
[C42]
K. Christodoulopoulos, K.
Manousakis, E. Varvarigos, "Comparison
of Routing and Wavelength Assignment Algorithms in WDM Networks", IEEE
Global Telecommunications Conference (GLOBECOM), New Orleans, USA, Dec. 2008.
[C43]
E. Varvarigos,
V. Sourlas, K. Christodoulopoulos, "Routing and Scheduling Sessions in Networks that Support
Advance Reservations", International Conference on Broadband
Communications, Networks and Systems (BROADNETS), London, U.K., Sept. 2008.
[C44]
K. Christodoulopoulos, N. Doulamis, E. Varvarigos, "Joint
Communication and Computation Task Scheduling in Grids", IEEE/ACM
International Symposium on Cluster Computing and the Grid (CCGrid),
Lyon, France, May 2008.
[C45]
P. Kokkinos, K.
Christodoulopoulos, A. Kretsis, E. Varvarigos, "Data
Consolidation: A Task Scheduling and Data Migration Technique for Grid Networks",
IEEE/ACM International Symposium on Cluster Computing and the Grid (CCGrid), Lyon, France, May 2008.
[C46]
K. Christodoulopoulos, E. Varvarigos, C. Develder,M.
Leenheer, B. Dhoedt, "Job
Demand Models For Optical Grid Research", International Conference on
Optical Networking Design and Modeling (ONDM),Athens, Greece, May 2007.
[C47]
K. Christodoulopoulos, V. Gkamas, E. Varvarigos, "Delay
Components of Job Processing in a Grid: Statistical Analysis and Modeling",
International Conference on Networking and Services (ICNS), Athens, Greece,
2007.
[C48]
M. Oikonomakos,
K. Christodoulopoulos, E. Varvarigos, "Profiling
Computation Jobs in Grid Systems", IEEE/ACM International Symposium on
Cluster Computing and the Grid (CCGrid), Rio De
Janeiro, Brazil, May 2007.
[C49]
K. Christodoulopoulos, K. Vlachos,
K. Yiannopoulos, E. Varvarigos, "Relaxing
Delayed Reservations: An approach for QoS provision and service differentiation
in Optical Burst Switching networks", International Conference on
Broadband Communications, Networks and Systems (BROADNETS), San Jose, USA, Oct.
2006.
[C50]
K. Ramantas, K.
Christodoulopoulos, K. Vlachos, E. Van Breusegem, M. Pickavet, "SLIP-N
Architecture: A new Hybrid Optical Switching Scheme", International
Conference on Broadband Communications, Networks and Systems (BROADNETS), San
Jose, USA, Oct. 2006.
[C51]
K. Christodoulopoulos, E. V. Breusegem, K. Vlachos, M. Pickavet,
E. Varvarigos, D. Colle, "Performance
Evaluation of Overspill Routing in Optical Networks", IEEE
International Conference on Communications (ICC), Istanbul, Turkey, June 2006.
[C52]
L. Stampoulidis,
E. Kehayas, K. Vyrsokinos, K.
Christodoulopoulos, D. Tsiokos, Bakopoulos,
T. Kanellos, K. Vlachos, E. A. Varvarigos and H.
Avramopoulos, "ARTEMIS: A 40 Gb/s All-Optical Self-Routing Node and Network
Architecture employing Asynchronous Bit and Packet-Level Optical Signal
Processing", IEEE Global Telecommunications Conference (GLOBECOM), St.
Louis, USA, Dec. 2005.
[C53]
K. Vyrsokinos,
E Kehayas,L. Stampoulidis,
H. Avramopoulos, K. Christodoulopoulos, K. Vlachos, E. A. Varvarigos,
"ARTEMIS:
A New Architecture for All-Optical Asynchronous Self-Routing Network with
Efficient Contention Protection and QoS Differentiation", European
Conference on Optical Communication (ECOC), Glasgow, U.K., Tech. Dig. We4.P.083, 2005.
Posters
[P6] V. Gkamas, K. Christodoulopoulos, E. Varvarigos,
"A comparison study of joint and sequential multi-layer
planning for IP over flexible optical networks", Optical Fiber
Communications Conference (OFC), 2015.
[P5] K.
Christodoulopoulos, K. Katrinis, M. Ruffini, D.
O'Mahony, "Accelerating HPC workloads with dynamic adaptation of a
software-defined hybrid electronic/optical interconnect", Optical
Fiber Communication Conference (OFC), 2014.
[P4] K.
Christodoulopoulos, M. Angelou, P. Zakynthinos, D. Klonidis, E. Varvarigos, I. Tomkos, "The Value of Flexible Optical Networking,
poster", ECOC, 2011
[P3] K.
Manousakis, K. Christodoulopoulos, E. Varvarigos,
"Avoiding Adjacent Channel Interference in Static RWA", 6th
International Symposium on communication systems, networks and digital signal
processing (CSNDSP) Graz, Austria, 2008.
[P2] K.
Christodoulopoulos, N. Doulamis, E.Varvarigos
"Joint Communication and Computation Task Scheduling in Grids", 3rd
E-science Conference, 2007. (Best poster award).
[P1] K.
Christodoulopoulos, E. Varvarigos "Statistical
Analysis of the Workload and Modeling of the Time a Job Spends at Different
States in the LCG/EGEE Environment", EGEE Conference, 2007.
Invited Talks
[I15] A.
Kretsis, L. Corazza, K. Christodoulopoulos, P. Kokkinos, E. Varvarigos,
“An emulation environment for SDN enabled flexible IP/optical networks”,
International Conference on Transparent Optical Networks (ICTON), 2016
[I14] K.
Christodoulopoulos, K. Kontodimas, K. Yiannopoulos,
E. Varvarigos, “Bandwidth allocation in the NEPHELE
hybrid optical interconnect”, International Conference on Transparent Optical
Networks (ICTON), 2016
[I13] K.
Christodoulopoulos, E. Varvarigos, "Evaluating flexibility degrees in optical networks",
Optical Fiber Communication Conference (OFC), 2015.
[I12] K.
Christodoulopoulos, P. Kokkinos, A. Di Giglio, A. Pagano, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, JC. Antona, C. Delezoide, P. Jenneve, J. Pesic,
Y. Pointurier, N. Sambo, F. Cugini, P. Castoldi, G.
Bernini , G. Carrozzo, and E. Varvarigos, "ORCHESTRA - Optical performance monitoring enabling
flexible networking", International Conference on Transparent Optical
Networks (ICTON), 2015.
[I11] P.
Castoldi, G. Bernini, K. Christodoulopoulos, F. Cugini, N. Sambo, “A monitoring
architecture for self-configurable optical networks”, ”,
International Conference on Transparent Optical Networks (ICTON), 2015
[I10] P.
Soumplis, P. Papanikolaou, K. Christodoulopoulos, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, E. Varvarigos, "Cross-layer optimization: Network cost vs. physical layer
margins", International Conference on Transparent Optical Networks
(ICTON), 2015.
[I9] E. Varvarigos, K. Christodoulopoulos, "Algorithmic challenges in flexible optical networks",
International Conference on Computing, Networking and Communications (ICNC),
2014.
[I8] A. Siokis, K. Christodoulopoulos, E. Varvarigos,
"On-OPCB interconnection networks", International
Conference on Transparent Optical Networks (ICTON), 2014.
[I7] A.
Kretsis, P. Kokkinos, K. Christodoulopoulos, E. Varvarigos,
"Mantis: Optical network planning and operation tool",
International Conference on Transparent Optical Networks (ICTON), 2013.
[I6] E. Varvarigos, K. Christodoulopoulos, Static
and dynamic spectrum allocation in flexi-grid optical networks", International
Conference on Transparent Optical Networks, (ICTON), 2012.
[I5] E. Varvarigos, K. Christodoulopoulos, "Algorithmic
aspects of optical network design", International Conference on
Optical Network Design and Modeling, (ONDM), 2011.
[I4] K.
Christodoulopoulos, "Elastic Bandwidth Allocation in Flexible OFDM-based Optical
Networks", Workshop on Cross-layer Algorithms and Protocols for
Optical Networks, International Conference on Broadband Communications,
Networks and Systems (BROADNETS), Athens, Greece, Oct. 2010.
[I3] K.
Christodoulopoulos, P. Kokkinos, K. Manousakis, E. Varvarigos,
" Cross Layer RWA in WDM Networks: Is the Added Complexity
Useful or a Burden?, International Conference on Transparent Optical
Networks, (ICTON), Azores, Portugal, July 2009.
[I2] K.
Christodoulopoulos, I. Tomkos, E. Varvarigos,
"A Comparison of Offline IARWA Approaches", Networks
and Optical Communications - Optical Cabling and Infrastructure (NOC-OCI),
Valladolid, Spain, June 2009.
[I1] K.
Christodoulopoulos, E. Varvarigos, "Routing and Scheduling in Grids", International
Conference on Transparent Optical Networks, (
Book Chapters
[B5] L.
Velasco, M. Ruiz, K. Christodoulopoulos, E. Varvarigos,
M. Zotkiewicz, M. Pioro, “Routing
and Spectrum Allocation”, Elastic Optical Networks, pp. 55-81, 2016.
[B4] A. Stavdas, C. Matrakidis, M.
Gunkel, A. Asensio, L. Velasco, E. Varvarigos, K.
Christodoulopoulos “Taking Advantage of Elastic Optical Networks”, Elastic
Optical Networks, pp. 31-54, 2016.
[B3] K.
Christodoulopoulos, E. Varvarigos, "Considering
linear and non-linear impairments in offline-design", in "Cross-layer
Design in Optical Networks",Eds
Subramaniam,Chava, Springer, to appear.
[B2] K.
Christodoulopoulos, E. Varvarigos, "Online
Impairment Aware Routing and Wavelength Assignment in WDM Optical
Networks", in "Horizons in Computer Science Research. Volume 6",
Nova publishers, 2011, ISBN:978-1-61470-455-3.
[B1] P.
Kokkinos, K. Christodoulopoulos, N. Doulamis, E. Varvarigos, "Quality of Service Scheduling of
Computation and Communication Resources in Grid Networks", Chapter 3, Grid
Computing Research Progress, Nova publishers, 2008. ISBN: 978-1-60456-404-4.