Publications

Journal Papers: (*corresponding author)

  1. Y. Yuan, L. Lei*, Y. Yang, Y. Luo, L. Pu, S. Chatzinotas, "Energy-Efficient Federated Learning in Wireless Edge Computing: Sparsification and Resource Optimization", IEEE Journal on Selected Areas in Communications, 2022, submitted.

  2. M. Minardi, T. X. Vu, L. Lei, S. Chatzinotas, and C. Politis, “Virtual Network Embedding for Dynamic NGSO Systems: Algorithmic Solution and SDN-Testbed Validation,” IEEE/ACM Transactions on Networking, 2022, submitted.

  3. Ortiz-Gomez, Flor G., Lei Lei, Eva Lagunas, Ramon Martinez, Daniele Tarchi, Jorge Querol, Miguel A. Salas-Natera, and Symeon Chatzinotas, "Machine Learning for Radio Resource Management in Multibeam GEO Satellite Systems", Electronics, no. 7: 992, 2022.

  4. Y. Yuan, L. Lei*, T. X. Vu, C. Zhang, S. Chatzinotas, and S. Sun, “Adapting to Dynamic LEO-B5G Systems: Meta-Critic Learning Based Efficient Resource Scheduling”, IEEE Transactions on Wireless Communications, 2022.

  5. A. Wang, L. Lei*, E. Lagunas, A. I. Pérez-Neira, S. Chatzinotas, and B. Ottersten, "Joint Optimization of Beam-Hopping Design and NOMA-Assisted Transmission for Flexible Satellite Systems", IEEE Transactions on Wireless Communications, 2022.

  6. A. B. M. Adam, L. Lei*, S. Chatzinotas, and N. U. R. Junejo, "Deep Convolutional Self-Attention Network for Energy-Efficient Power Control in NOMA Networks", IEEE Transactions on Vehicle Technology, 2022.

  7. L. Lei, Y. Yuan, T. X. Vu, S. Chatzinotas, M. Minardi, and J. F. Mendoza Montoya, “Dynamic-Adaptive AI Solutions for Network Slicing Management in Satellite-Integrated B5G Systems”, IEEE Network Magazine, 2021.

  8. K. Long, Y. Ai, L. Lei, G. Kaddoum, S. Chatzinotas, and B. Ottersten, "An Overview of Information-Theoretic Secrecy Analysis over Classical Wiretap Fading Channels", EURASIP Journal on Wireless Communications and Networking, 2021.

  9. Y. Luo, L. Pu, L. Lei, ``Malicious Energy Attack and Defense in RF Energy Harvesting Wireless Sensor Networks'', IEEE Wireless Communications Letters, 2021, submitted.

  10. Y. Yuan, L. Lei*, T. X. Vu, S. Chatzinotas, S. Sun, and B. Ottersten, “Energy Minimization in UAV-Aided Networks: Actor-Critic Learning for Constrained Scheduling Optimization,” IEEE Transactions on Vehicle Technology, 2021. (code).

  11. A. Wang, L. Lei*, E. Lagunas, S. Chatzinotas, and B. Ottersten, ``Completion Time Minimization in NOMA Systems: Learning for Combinatorial Optimization'', IEEE Networking Letters, 2021. (code)

  12. Y. Yuan, L. Lei, T. X. Vu, S. Chatzinotas, S. Sun, and B. Ottersten, "Actor-Critic Learning based Energy Optimization for UAV Access-and-Backhaul Networks", EURASIP Journal on Wireless Communications and Networking, 2021 (code).

  13. L. Lei, E. Lagunas, Y. Yuan, M. Kibria, S. Chatzinotas, and B. Ottersten, ``Beam Illumination Pattern Design in Satellite Networks: Learning and Optimization for Efficient Beam Hopping", IEEE Access, vol. 8, pp. 136655-136667, 2020.

  14. O. Kodheli et al., “Satellite Communications in the New Space Era: A Survey and Future Challenges”, IEEE Communications Surveys& Tutorials, 2020,

  15. A. Wang, L. Lei*, E. Lagunas, A. I. Pérez-Neira, S. Chatzinotas, and B. Ottersten, "NOMA-Enabled Multi-Beam Satellite Systems: Joint Optimization to Overcome Offered-Requested Data Mismatches", IEEE Transactions on Vehicle Technology, 2020.

  16. Y. Luo, L. Pu, L. Lei, ``Impact of Varying Radio Power Density on Wireless Communications of RF Energy Harvesting Systems'', IEEE Transactions on Communications, 2020.

  17. L. Lei, L. You, Y. Yang, D. Yuan, S. Chatzinotas, and B. Ottersten, "Load Coupling and Energy Optimization in Multi-Cell and Multi-Carrier NOMA Networks", IEEE Transactions on Vehicular Technology, 2019.

  18. T. X. Vu, L. Lei, S. Chatzinotas, and B. Ottersten, and A. V. Trinh, "On The Successful Delivery Probability of Full-Duplex Enabled Mobile Edge Caching," IEEE Communications Letters, Apr. 2019.

  19. L. Lei, L. You, Q. He, T. X. Vu, S. Chatzinotas, D. Yuan, and B. Ottersten, "Learning-Assisted Optimization for Efficient Scheduling in Deadline-Aware NOMA Systems", IEEE Transactions on Green Communications and Networking, Sept. 2019.

  20. L. Lei, E. Lagunas, S. Chatzinotas, and B. Ottersten, "NOMA Aided Interference Management for Full-Duplex Self-Backhauling HetNets", IEEE Communications Letters, Aug. 2018.

  21. Z. Chang, L. Lei, Z. Zhou, S. Mao, T. Ristaniemi, "Learn to Cache: Machine Learning for Network Edge Caching in the Big Data Era", IEEE Wireless Communications, July 2018

  22. L. You, D. Yuan, L. Lei, S. Sun, S. Chatzinotas, and B. Ottersten, "Resource Optimization with Load Coupling in Multi-cell NOMA", IEEE Transactions on Wireless Communications, May 2018.

  23. Z. Chang, L. Lei*, H. Zhang, T. Ristaniemi, S. Chatzinotas, B. Ottersten, and Z. Han, "Energy-Efficient and Secure Resource Allocation for Multiple-Antenna NOMA with Wireless Power Transfer", IEEE Transactions on Green Communications and Networking, 2018.

  24. Z. Liu, L. Lei, N. Zhang, G. Kang, and S. Chatzinotas, "Joint Beamforming and Power Optimization with Iterative User Clustering for MISO-NOMA Systems", IEEE Access, 2017.

  25. L. Lei, D. Yuan, P. Värbrand, "On Power Minimization for Non-orthogonal Multiple Access (NOMA)," IEEE Communications Letters, vol. 20, no. 12, pp. 2458-2461, Dec. 2016.

  26. L. Lei, D. Yuan, C. K. Ho, and S. Sun, "Power and Channel Allocation for Non-orthogonal Multiple Access in 5G Systems: Tractability and Computation," IEEE Transactions on Wireless Communications, vol. 15, no. 12, pp. 8580-8594, Dec. 2016. (IEEE Best Readings in Non-Orthogonal Multiple Access)

  27. C. K. Ho, D. Yuan, L. Lei, and S. Sun. "On Power and Load Coupling in Cellular Networks for Energy Optimization," IEEE Transactions on Wireless Communications, vol.14, no.1, pp.509-519, Jan. 2015.

  28. L. Lei, D. Yuan, C. K. Ho, and S. Sun, " Optimal Cell Clustering and Activation for Energy Saving in Load-Coupled Wireless Networks," IEEE Transactions on Wireless Communications, vol.14, no.11, pp.6150-6163, Nov. 2015.

  29. Y. X. Zhao, T. Larsson, D. Yuan, E. Rönnberg, L. Lei, "Power Efficient Uplink Scheduling in SC-FDMA Benchmarking by Column Generation," Journal of Optimization and Engineering, 2014.

  30. L. Lei, D. Yuan, C. K. Ho, and S. Sun, "A Unified Graph Labeling Algorithm for Consecutive-Block Channel Allocation in SC-FDMA," IEEE Transactions on Wireless Communications, vol.12, no.11, pp.5767-5779, November 2013. (IEEE Sweden VT-COM-IT Joint Chapter Best Student Journal Paper Award)


Book Chapters:

  1. M. Minardi, F. Mendoza, L. Lei, T. X. Vu, and S. Chatzinotas, "Virtual network embedding for NGSO-terrestrial systems: parallel computation and SDN-testbed implementation", in Non‐Geostationary Satellite Communications Systems, IET, 2021.


Conference Papers:

  1. L. Lei, Y. Yuan, Y. Yang, Y. Luo, L. Pu, and S. Chatzinotas, "Sparsification and Optimization for Energy-Efficient Federated Learning in Wireless Edge Networks", IEEE Globecom 2022, submitted.

  2. A. Wang, L. Lei, X. Hu, E. Lagunas, A. I. Pérez Neira, and S. Chatzinotas, "Adaptive Beam Pattern Selection and Resource Allocation for NOMA-Based LEO Satellite Systems", IEEE Globecom 2022, submitted.

  3. T. S. Abdu, S. Kisseleff, L. Lei, E. Lagunas, Joel Grotz, and S. Chatzinotas, "A Deep Learning Based Acceleration of Complex Satellite Resource Management Problem", IEEE European Signal Processing Conference (EUSIPCO), 2022.

  4. Y. Yuan, L. Lei, T. X. Vu, S. Fowler, and S. Chatzinotas, "Efficient Resource Scheduling and Optimization for Over-Loaded LEO-Terrestrial Networks", IEEE ICC, 2022.

  5. T. S. Abdu, L. Lei, S. Kisseleff, E. Lagunas, S. Chatzinotas, and B. Ottersten, "Precoding-Aided Bandwidth Optimization for High Throughput Satellite Systems", IEEE 5G World Forum (5GWF), 2021.

  6. A. Wang, L. Lei, E. Lagunas, S. Chatzinotas, and B. Ottersten, "Dual-DNN Assisted Optimization for Efficient Resource Scheduling in NOMA-Enabled Satellite Systems", IEEE GLOBECOM, 2021.

  7. J. F. Mendoza, M. Minardi, S. Chatzinotas, L. Lei, and T. X. Vu, “An SDN Based Testbed for Dynamic Network Slicing in Satellite-Terrestrial Networks,” in Proc. IEEE MeditCom, 2021.

  8. A. Wang, L. Lei, E. Lagunas, A. I. Pérez-Neira, S. Chatzinotas, and B. Ottersten, "Joint Beam-Hopping Scheduling and Power Allocation in NOMA-Assisted Satellite Systems", IEEE WCNC 2021.

  9. Y. Yang, Y. Yuan, A. Chatzimichailidis, R. Sloun, L. Lei, S. Chatzinotas, ``Prox-SGD: Training Structured Neural Networks under Regularization and Constraints'', International Conference on Learning Representations (ICLR) 2020. (code).

  10. L. Xiang, L. Lei, S. Chatzinotas, B. Ottersten, and R. Schober, ``Towards Power-Efficient Aerial Communications via Dynamic Multi-UAV Cooperation'', IEEE WCNC 2020.

  11. Y. Yuan, L. Lei, T. X. Vu, S. Chatzinotas, and B. Ottersten, ``Actor-Critic Deep Reinforcement Learning for Energy Minimization in UAV-Aided Networks'', IEEE EUCNC 2020.

  12. L. Lei, E. Lagunas, Y. Yuan, M. Kibria, S. Chatzinotas, and B. Ottersten, ``Deep Learning for Beam Hopping in Multibeam Satellite Systems'', IEEE VTC 2020 Spring.

  13. Anyue Wang, Lei Lei, Eva Lagunas, Ana I. Pérez Neira, Symeon Chatzinotas, and Björn Ottersten, "On Fairness Optimization for NOMA-Enabled Multi-Beam Satellite Systems", IEEE PIMRC, 2019.

  14. Eva Lagunas, Lei Lei, Symeon Chatzinotas, Björn Ottersten, ``Satellite Links Integrated in 5G SDN-enabled Backhaul Networks: An Iterative Joint Power and Flow Assignment'', IEEE EUSIPCO, 2019.

  15. Yaxiong Yuan, Thang X. Vu, Lei Lei, Symeon Chatzinotas, and Björn Ottersten, ``Joint User Grouping and Power Allocation for MISO Systems: Learning to Schedule'', IEEE EUSIPCO, 2019.

  16. Thang X. Vu, Lei Lei, Symeon Chatzinotas, and Björn Ottersten, ``Machine Learning based Antenna Selection and Power Allocation in Multi-user MISO Systems'', IEEE WiOpt Workshop on Machine Learning for Communications, 2019.

  17. Lei Lei, Yaxiong Yuan, Thang X. Vu, Symeon Chatzinotas, and Björn Ottersten, ``Learning-Based Resource Allocation: Efficient Content Delivery Enabled by Convolutional Neural Network'', IEEE SPAWC, 2019.

  18. L. Lei, T. X. Vu, L. Xiang, X. Zhang, S. Chatzinotas, and B. Ottersten, “Optimal Resource Allocation for NOMA-Enabled Cache Replacement and Content Delivery”, IEEE PIMRC, 2019.

  19. E. Lagunas, L. Lei, S. Chatzinotas and B. Ottersten, “Power and Flow Assignment for 5G Integrated Terrestrial-Satellite Backhaul Networks”, in Proc. IEEE WCNC, 2019.

  20. T. X. Vu, L. Lei, S. Chatzinotas, B. Ottersten, and T. A. Vu, “Energy Efficient Design for Coded Caching Delivery Phase”, in Proc. IEEE SigTelCom 2019.

  21. T. X. Vu, T. A. Vu, L. Lei, S. Chatzinotas, and B. Ottersten, “Linear Precoding Design for Cache-aided Full-duplex Networks”, in Proc. IEEE WCNC 2019.

  22. L. Lei, L. You, Y. Yang, D. Yuan, S. Chatzinotas, and B. Ottersten, "Power and Load Optimization in Interference-Coupled Non-Orthogonal Multiple Access Networks'', in Proc. IEEE GLOBECOM 2018.

  23. L. Lei, L. You, D. Yuan, S. Chatzinotas, and B. Ottersten, "Efficient Resource Optimization in Wireless Networks: A Deep-Learning Assisted Approach", INFORMS Telecommunications Conference 2018.

  24. L. Lei, Zheng Chang, Yun Hu, Tapani Ristaniemi, Yaxiong Yuan, and Symeon Chatzinotas, “Energy-Efficient Resource Optimization with Wireless Power Transfer for Secure NOMA Systems”, in Proc. IEEE/CIC International Conference on Communications in China (ICCC) 2018.

  25. T. X. Vu, L. Lei, S. Vuppala, A. Kalantari, S. Chatzinotas, and B. Ottersten, "Latency Minimization for Content Delivery Networks with Wireless Edge Caching", in Proc. IEEE ICC 2018.

  26. L. Lei, T. X. Vu, L. You, S. Fowler, and D. Yuan, "Efficient Minimum-Energy Scheduling with Machine-Learning based Predictions for Multiuser MISO Systems", in Proc. IEEE ICC 2018.

  27. T. X. Vu, L. Lei, S. Vuppala, S. Chatzinotas, and B. Ottersten, "Energy-Efficient Design for Latency-tolerant Content Delivery Networks'', in Proc. IEEE WCNC, 2018.

  28. L. Lei, L. You, G. Dai, T. X. Vu, D. Yuan, and S. Chatzinotas, "A Deep Learning Approach for Optimizing Content Delivering in Cache-Enabled HetNet", IEEE International Symposium on Wireless Communication Systems (ISWCS), 2017.

  29. L. You, L. Lei, D. Yuan, S. Sun, S. Chatzinotas, and B. Ottersten, "A Framework for Optimizing Multi-Cell NOMA: Delivering Demand with Less Resource," IEEE GLOBECOM, 2017.

  30. E. Lagunas, L. Lei, S. Maleki, S. Chatzinotas and B. Ottersten, "Power Allocation for In-Band Full-Duplex Self-Backhauling", IEEE 40th International Conference on Telecommunications and Signal Processing (TSP), 2017.

  31. L. Lei, E. Lagunas, S. Maleki, Q. He, S. Chatzinotas and B. Ottersten, "Energy Optimization for Full-Duplex Self-Backhauled HetNet with Non-Orthogonal Multiple Access", IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2017.

  32. E. Lagunas, S. Maleki, L. Lei, C. Tsinos, S. Chatzinotas, B. Ottersten, "Carrier Allocation for Hybrid Satellite-Terrestrial Backhaul Networks", IEEE ICC, 2017.

  33. Z. Liu, G. Kang, L. Lei, N. Zhang and S. Zhang, "Power Allocation for Energy Efficiency Maximization in Downlink CoMP Systems With NOMA", IEEE Wireless Communications and Networking Conference (WCNC), 2017.

  34. L. You, L. Lei, and D. Yuan, "Optimizing Power and User Association for Energy Saving in Load-Coupled Cooperative LTE," IEEE International Conference on Communications (ICC), 2016.

  35. M. Lei, X. Zhang, T. Zhang, L. Lei, Q. He, and D. Yuan. "Successive interference cancellation for throughput maximization in wireless powered communication networks", IEEE VTC (Fall 2016), 2016.

  36. L. Lei, D. Yuan, C. K. Ho, and S. Sun. "Joint optimization of power and channel allocation with non-orthogonal multiple access for 5G cellular systems". Proceedings of IEEE GLOBECOM, 2015.

  37. L. You, L. Lei, and D. Yuan. "Load balancing via joint transmission in heterogeneous LTE: modeling and computation". Proceedings of IEEE PIMRC, 2015.

  38. L. Lei, D. Yuan, C. K. Ho, and S. Sun, "Resource Scheduling to Jointly Minimize Receiving and Transmitting Energy in OFDMA Systems," 2014 IEEE International Symposium on Wireless Communication Systems (ISWCS), 2014.

  39. L. You, L. Lei, and D. Yuan, "A Performance Study of Energy Minimization for Interleaved and Localized FDMA," IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), Dec., 2014.

  40. C. K. Ho, D. Yuan, L. Lei, and S. Sun, "Optimal Energy Minimization in Load-Coupled Wireless Networks: Computation and Properties," 2014 IEEE International Conference on Communications (ICC), 2014.

  41. L. You, L. Lei, and D. Yuan, "Range Assignment for Power Optimization in Load-Coupled Heterogeneous Networks", IEEE International Conference on Communication Systems (ICCS), Nov., 2014.

  42. H. Zhao, L. Lei, D. Yuan, T. Larsson, and E. Rönnberg, "Power Efficient Uplink Scheduling in SC-FDMA: Bounding Global Optimality by Column Generation," IEEE 18th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), pp.119-123, September 2013.

  43. L. Lei, S. Fowler, and D. Yuan, "Improved Resource Allocation Algorithm Based on Partial Solution Estimation for SC-FDMA Systems," IEEE 78th Vehicular Technology Conference (VTC), pp.1-5, September, 2013.

  44. L. Lei, V. Angelakis, and D. Yuan, "Performance analysis of chunk-based resource allocation in wireless OFDMA systems," IEEE 17th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), pp.90-94, September, 2012.

  45. D. Yuan, V. Angelakis, and L. Lei, "Minimum-length Scheduling in Wireless Networks With Multi-user Detection and Interference Cancellation: Optimization and Performance Evaluation," IEEE International Conference on Communication Systems (ICCS), pp.315-319, November, 2012.


Thesis:

  1. L. Lei, "From Orthogonal to Non-orthogonal Multiple Access: Energy- and Spectrum-Efficient Resource Allocation," Ph.D. Dissertation, No. 1752, Linköping Studies in Science and Technology, Linköping University, May 2016.

  2. L. Lei, "Radio Resource Optimization for OFDM-based Broadband CellularSystems," Licentiate Thesis No. 1649, Linköping Studies in Science and Technology, Linköping University, 2014.

Project Report:

  1. FP7-PEOPLE-2012-IAPP-324515 MESH-WISE, D1.3: "Heterogeneous Network Deployment Optimization and Performance Evaluation", 2016.

  2. FP7-PEOPLE-2012-IRSES-318992 WiNDOW, D3.2: "Interference Mitigation for Indoor Dense Heterogeneous Deployments", 2015.