Submitted/In Revision Journal Papers

  1. E. Fountoulakis, M. Codreanu, A. Ephremides, N. Pappas, ‘‘Joint Sampling and Transmission Policies for Minimizing Cost under AoI Constraints", Submitted, IEEE Transactions on Communications, Nov. 2022.

  2. Z. Chen, K. Lang, H. Yang, N. Pappas, M. Wang, and T. Quek, ‘‘Age of Information of A Dual Queue Status Update System: A Stochastic Hybrid Systems Method ", Submitted, IEEE Wilreless Communications Letters, Oct. 2022.

  3. H. Zhou, X. Liu, Y. Deng, N. Pappas, and A. Nallanathan, ‘‘Task-Oriented Semantics-Aware 6G Networks", Submitted, IEEE Wireless Communications, Oct. 2022.

  4. N. Nomikos, T. Charalambous, Y. Pignolet, N. Pappas, “On the Interplay Between Deadline-Constrained Traffic and the Number of Allowed Retransmissions in Random Access Networks”, Submitted, Oct. 2022.

  5. D. Kumar, P. Mohapatra, N. Pappas, ‘‘Two-user Z Interference Channel under Fading: A Finite Block Length Performance Analysis", Submitted, IEEE Transactions on Communications, Sept. 2022.

  6. Z. Chen, D. Deng, H. Yang, N. Pappas, L. Hu, Y. Jia, M. Wang, and T. Quek, ‘‘ Analysis of Age of Information in Dual Updating Systems", Submitted, IEEE Transactions on Wilreless Communications, June 2022.

  7. G. Stamatakis, N. Pappas, A. Fragkiadakis, A. Traganitis, ‘‘Semantics-Aware Active Fault Detection in Status Updating Systems", Submitted, IEEE Transactions on Communications, Feb. 2022.

  8. E. Fountoulakis, T. Charalambous, A. Ephremides, N. Pappas, ‘‘A Dynamic Scheduling Policy for a Network with Heterogeneous Time-Sensitive Traffic", Submitted, IEEE Transactions on Communications, Sept. 2021.

  9. C. Xu, X. Zhang, H. Yang, X. Wang, N. Pappas, D. Niyato, T. Quek, ‘‘Optimal Status Updates for Minimizing Age of Correlated Information in IoT Networks with Energy Harvesting Sensors", Submitted, IEEE Transactions on Mobile Computing, Aug. 2021.

  10. H. Chen, Q. Wang, P. Mohapatra, N. Pappas, ‘‘Secure Status Updates under Eavesdropping: Age of Information-based Physical Layer Security Metrics”, Submitted, Feb. 2020.

Journal Papers (Published/To Appear)

  • [J55] M. Hatami, M. Leinonen, Z. Chen, N. Pappas, M. Codreanu, ‘‘On-Demand AoI Minimization in Resource-Constrained Cache-Enabled IoT Networks with Energy Harvesting Sensors”, IEEE Transactions on Communications, vol. 70, no. 11, Nov. 2022.

  • [J54] J. Cheng, C. Shen, Z. Chen, N. Pappas, ‘‘Robust Beamforming Design for IRS-Aided URLLC in D2D Networks”, IEEE Transactions on Communications, vol. 70, no. 9, Sept. 2022.

  • [J53] P. Popovski, F. Chiariotti, K. Huang, A. Kalor, M. Kountouris, N. Pappas, B. Soret, ‘‘A Perspective on Time toward Wireless 6G", Proceedings of the IEEE, vol. 110, no. 8, Aug. 2022.

  • [J52] C. Tatino, N. Pappas, D. Yuan, ‘‘QoS Aware Robot Trajectory Optimization with IRS-Assisted Millimeter-Wave Communications", IEEE Open Journal of Communications Society, vol. 3, pp. 1323-1336, 2022.

  • [J51] S. Allipuram, P. Mohapatra, N. Pappas, S. Parmar, S. Chakrabarti, ‘‘Performance Analysis of a MIMO System with Bursty Traffic under Jamming Attack", IEEE Transactions on Green Communications and Networking, vol. 6, no. 2, June 2022.

  • [J50] E. Fountoulakis, T. Charalambous, N. Nomikos, A. Ephremides, N. Pappas, ‘‘Information Freshness and Packet Drop Rate Interplay in a Two-User Multi-Access Channel", IEEE/KICS Journal of Communications and Networks (JCN), vol. 24, no. 3, pp. 357-364, June 2022.

  • [J49] M. Salimnejad, N. Pappas, ‘‘On the Age of Information in a Two-User Multiple Access Setup“, Entropy Special Issue ‘‘Age of Information: Concept, Metric and Tool for Network Control”, Apr. 2022.

  • [J48] M. Moltafet, M. Leinonen, M. Codreanu, N. Pappas, ‘‘Power Minimization for Age of Information Constrained Dynamic Control in Wireless Sensor Networks", IEEE Transactions on Communications, vol. 70, no. 1, Jan. 2022.

  • [J47] P. D. Mankar, Z. Chen, M. A. Abd-Elmagid, N. Pappas, H. S. Dhillon, ‘‘Throughput and Age of Information in a Cellular-based IoT Network”, IEEE Transactions on Wireless Communications, vol. 20, no. 12, Dec. 2021.

  • [J46] A. Arvanitaki, N. Pappas, N. Carlsson, P. Mohapatra, O. Burdakov, ‘‘Performance Analysis of Congestion-Aware Secure Broadcast Channels", EURASIP Journal on Wireless Communications and Networking, Sept. 2021.

  • [J45] M. Kountouris, N. Pappas, ‘‘Semantics-Empowered Communication for Networked Intelligent Systems", IEEE Communications Magazine, vol. 59, no. 6, June 2021.

  • [J44] N. Nomikos, T. Charalambous, N. Pappas, D. Vouyioukas, R. Wichman, ‘‘LoLa4SOR: Leveraging Successive Transmissions for Low-Latency Buffer-Aided Opportunistic Relay Networks", IEEE Open Journal of Communications Society, vol. 2, pp. 1041-1054, 2021.

  • [J43] A. Kosta, N. Pappas, A. Ephremides, V. Angelakis, ‘‘The Age of Information in a Discrete Time Queue: Stationary Distribution and Non-linear Age Mean Analysis", IEEE Journal on Selected Areas in Communications, vol. 39, no. 5, May 2021.

  • [J42] N. Pappas, I. Dimitriou, Z. Chen, ‘‘On the Benefits of Network-level Cooperation in IoT Networks with Aggregators", Performance Evaluation, Vol. 147, May 2021.

  • [J41] G. Smpokos, Z. Chen, P. Mohapatra, N. Pappas, ‘‘Performance Analysis of a Cache-Aided Wireless Heterogeneous Network with Secrecy Constraints", IEEE Access, vol. 9, 2021.

  • [J40] I. Avgouleas, N. Pappas, V. Angelakis, ‘‘Wireless Caching Helper System with Heterogeneous Traffic and Random Availability", EURASIP Journal on Wireless Communications and Networking, Mar. 2021.

  • [J39] Z. Chen, N. Pappas, E. Bjornson, E. G. Larsson, ‘‘Optimizing Information Freshness in a Multiple Access Channel With Heterogeneous Devices", IEEE Open Journal of Communications Society, vol. 2, pp. 456-470, 2021.

  • [J38] E. Fountoulakis, N. Pappas, A. Ephremides, “Dynamic Power Control for Time-Critical Networking with Heterogeneous Traffic”, ITU Journal on Future and Evolving Technologies, Vol. 2, Issue 1, Mar. 2021

  • [J37] I. Dimitriou, N. Pappas, ‘‘A Random Access G-Network: Stability, Stable Throughput, and Queueing Analysis", Probability in the Engineering and Informational Sciences (PEIS), Cambridge University Press, vol. 35, no. 1, pp. 111–137, 2021.

  • [J36] C. Tatino, N. Pappas, D. Yuan, ‘‘Multi-Robot Association-Path Planning in Millimeter-Wave Industrial Scenarios", IEEE Networking Letters, vol. 2, no. 4, pp. 190-194, Dec. 2020.

  • [J35] M. A. Abd-Elmagid, H. S. Dhillon, N. Pappas, ‘‘AoI-optimal Joint Sampling and Updating for Wireless Powered Communication Systems”, IEEE Transactions on Vehicular Technology, IEEE Transactions on Vehicular Technology, vol. 69, no. 11, Nov. 2020.

  • [J34] E. Fountoulakis, G. Paschos, N. Pappas, ‘‘UAV Trajectory Optimization for Time Constrained Applications", IEEE Networking Letters, vol. 2, no. 3, Sept. 2020.

  • [J33] A. Kosta, N. Pappas, A. Ephremides, V. Angelakis, “The Cost of Delay in Status Updates and their Value: Non-linear Ageing”, IEEE Transactions on Communications, vol. 68, no. 8, Aug. 2020. [Best Student Journal Paper Award in Swe-CTW 2021]

  • [J32] M. A. Abd-Elmagid, H. S. Dhillon, N. Pappas, ‘‘A Reinforcement Learning Framework for Optimizing Age-of-Information in RF-powered Communication Systems”, IEEE Transactions on Communications, vol. 68, no. 8, Aug. 2020.

  • [J31] G. Stamatakis, N. Pappas, A. Traganitis, ‘‘Optimal Policies for Status Update Generation in an IoT Device with Heterogeneous Traffic", IEEE Internet of Things Journal, vol. 7, no. 6, June 2020.

  • [J30] E. Fountoulakis, Qi Liao, N. Pappas, ‘‘An End-to-End Performance Analysis for Service Chaining in a Virtualized Network", IEEE Open Journal of Communications Society, vol. 1, pp. 148-163, 2020.

  • [J29] A. Arvanitaki, N. Pappas, P. Mohapatra, N. Carlsson, “Delay Performance of a Two-User Broadcast Channel with Security Constraints”, SN Computer Science, Vol. 1, Jan. 2020.

  • [J28] I. Avgouleas, D. Yuan, N. Pappas, V. Angelakis, ‘‘Virtual Network Functions Scheduling under Delay-Weighted Pricing", IEEE Networking Letters, vol. 1, no. 4, pp. 160-163, Dec. 2019.

  • [J27] M. A. Abd-Elmagid, N. Pappas, H. S. Dhillon, ‘‘On the Role of Age-of-Information in Internet of Things", IEEE Communications Magazine, Dec. 2019.

  • [J26] C. Tatino, N. Pappas, I. Malanchini, L. Ewe, D. Yuan, ‘‘On the Benefits of Network-Level Cooperation in Millimeter-Wave Communications", IEEE Transactions on Wireless Communications, vol. 18, no. 9, pp. 4408-4424, Sept. 2019.

  • [J25] A. Kosta, N. Pappas, A. Ephremides, V. Angelakis, ‘‘Age of Information Performance of Multiaccess Strategies with Packet Management", IEEE/KICS Journal of Communications and Networks (JCN), June 2019. [2022 JCN Best Paper]

  • [J24] I. Dimitriou, N. Pappas, ‘‘Performance Analysis of a Cooperative Wireless Network with Adaptive Relays", Ad Hoc Networks, Vol. 87, May 2019.

  • [J23] N. Pappas, M. Kountouris, ‘‘Stable Throughput Region of the Two-User Interference Channel", Ad Hoc Networks, Vol. 85, Mar. 2019.

  • [J22] B. Chen, N. Pappas, Z. Chen, D. Yuan, J. Zhang, ‘‘Throughput and Delay Analysis of LWA with Bursty Traffic and Randomized Flow Splitting", IEEE Access, vol. 7, pp. 24667-24678, 2019.

  • [J21] B. Chen, L. You, N. Pappas, D. Yuan, ‘‘Resource Optimization for Joint LWA and LTE-U in Load-Coupled and Multi-Cell Networks", IEEE Communications Letters, vol. 23, no. 2, Feb. 2019.

  • [J20] O. Holland, E. Steinbach, V. Prasad, Q. Liu, Z. Dawy, A. Aijaz, N. Pappas, K. Chandra, V. Rao, S. Oteafy, M. Eid, M. Luden, A. Bhardwaj, X. Liu, J. Sachs, J. Araujo, ‘‘The IEEE 1918.1 “Tactile Internet” Standards Working Group and its Standards", Proceedings of the IEEE, vol. 107, no. 2, pp. 256-279, Feb. 2019.

  • [J19] L. You, Q. Liao, N. Pappas, D. Yuan, ‘‘Resource Optimization with Flexible Numerology and Frame Structure for Heterogeneous Services", IEEE Communications Letters, vol. 22, no. 12, Dec. 2018.

  • [J18] N. Pappas, M. Kountouris, A. Ephremides, V. Angelakis, ‘‘Stable Throughput Region of the Two-user Broadcast Channel", IEEE Transactions on Communications, vol. 66, no. 10, Oct. 2018.

  • [J17] Z. Chen, N. Pappas, M. Kountouris and V. Angelakis, ‘‘Throughput with Delay Constraints in a Shared Access Network with Priorities", IEEE Transactions on Wireless Communications, vol. 17, no. 9, Sept. 2018.

  • [J16] P. Mohapatra, N. Pappas, J. Lee, T. Q. S. Quek, V. Angelakis, “Secure Communications for the Two-user Broadcast Channel with Random Traffic”, IEEE Transactions on Information Forensics & Security, vol. 13, no. 9, Sept. 2018.

  • [J15] I. Dimitriou, N. Pappas, ‘‘Stable Throughput and Delay Analysis of a Random Access Network With Queue-Aware Transmission". IEEE Transactions on Wireless Communications, vol. 17, no. 5, pp. 3170-3184, May 2018.

  • [J14] N. Pappas, Z. Chen, I. Dimitriou, ‘‘Throughput and Delay Analysis of Wireless Caching Helper Systems with Random Availability", IEEE Access, vol. 6, 2018.

  • [J13] N. Pappas, J. Jeon, Di Yuan, A. Traganitis, A. Ephremides, ‘‘Wireless Network-Level Partial Relay Cooperation: A Stable Throughput Analysis", IEEE/KICS Journal of Communications and Networks (JCN), vol. 20, no. 1, Feb. 2018.

  • [J12] I. Avgouleas, N. Pappas, Di Yuan, V. Angelakis, ‘‘Probabilistic Cooperation of a Full-Duplex Relay in Random Access Networks", IEEE Access, vol. 5, 2017.

  • [J11] Z. Chen, N. Pappas, M. Kountouris, ‘‘Probabilistic Caching in Wireless D2D Networks: Hit Optimal vs. Throughput Optimal", IEEE Communications Letters, vol. 21, no. 3, Mar. 2017.

  • [J10] L. You, D. Yuan, N. Pappas, P. Varbrand, ‘‘Energy-aware wireless relay selection in load-coupled OFDMA cellular networks", IEEE Communications Letters, vol. 21, no. 1, Jan. 2017.

  • [J9] M. Ploumidis, N. Pappas, A. Traganitis, ‘‘Flow Allocation for Maximum Throughput and Bounded Delay on Multiple Disjoint Paths for Random Access Wireless Multihop Networks", IEEE Transactions on Vehicular Technology, vol. 66, no. 1, pp. 720-733, Jan. 2017.

  • [J8] V. Angelakis, I. Avgouleas, N. Pappas, E. Fitzgerald, Di Yuan, ‘‘Allocation of Heterogeneous Resources of an IoT Device to Flexible Services", IEEE Internet of Things Journal, vol. 3, no. 5, Oct. 2016.

  • [J7] N. Pappas, M. Kountouris, J. Jeon, A. Ephremides, A. Traganitis, ‘‘Effect of Energy Harvesting on Stable Throughput in Cooperative Relay Systems", IEEE/KICS Journal of Communications and Networks (JCN), Vol.18 No.2, Apr. 2016.

  • [J6] M. Ploumidis, N. Pappas, V. Siris, A. Traganitis, ‘‘On the Performance of Network Coding and Forwarding Schemes with Different Degrees of Redundancy for Wireless Mesh Networks", Computer Communications, Vol. 72, Dec. 2015.

  • [J5] G. Papadimitriou, N. Pappas, V. Angelakis, A. Traganitis, ‘‘Network-Level Performance Evaluation of a Two-Relay Cooperative Random Access Wireless System", Computer Networks, Vol. 88, Sep. 2015.

  • [J4] Y. Li, N. Pappas, V. Angelakis, M. Pioro, D. Yuan, ‘‘Optimization of Free Space Optical Wireless Network for Cellular Backhauling", IEEE Journal on Selected Areas in Communications, Vol. 33, No. 9, Sep. 2015.

  • [J3] N. Pappas, M. Kountouris, A. Ephremides, A. Traganitis, ‘‘Relay-assisted Multiple Access with Full-duplex Multi-Packet Reception", IEEE Transactions on Wireless Communications, Vol.14, No.7, July 2015.

  • [J2] N. Pappas, A. Ephremides, A. Traganitis, ‘‘Stability and Performance Issues of a Relay Assisted Multiple Access Scheme with MPR Capabilities", Computer Communications, Vol. 42, 1 Apr. 2014, Pages 70-76, Elsevier.

  • [J1] N. Pappas, J. Jeon, A. Ephremides, A. Traganitis, ‘‘Optimal Utilization of a Cognitive Shared Channel with a Rechargeable Primary Source Node", IEEE/KICS Journal of Communications and Networks (JCN) Special Issue on Energy Harvesting in Wireless Networks, Vol. 14, No. 2, Apr. 2012.