Nikolaos Pappas
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Submitted/In Revision Journal Papers

Journal Papers (Published/To Appear)

  • [J83] Z. Chen, Y. Tianqing, S. Fang, N. Pappas, M. Wang, D. Wu, T. Quek, ‘‘Age Analysis of Critical Information in Internet of Vehicle Networks with Service Confluence", IEEE Open Journal of Communications Society, Accepted/to appear, Mar. 2025.

  • [J82] L. Guo, W. Chen, Y. Sun, Bo Ai, N. Pappas, T. Quek, ‘‘Hierarchy-Aware and Channel-Adaptive Semantic Communication for Bandwidth-Limited Data Fusion", IEEE Wireless Communications Letters, Accepted/to appear, Mar. 2025.

  • [J81] L. Guo, W. Chen, Y. Sun, Bo Ai, N. Pappas, T. Quek, ‘‘Diffusion-Driven Semantic Communication for Generative Models with Bandwidth Constraints", IEEE Transactions on Wireless Communications, Accepted/to appear, Mar. 2025.

  • [J80] Q. Xiong, J. Cao, Xu Zhu, Y. Jiang, N. Pappas, ‘‘Inference-Aware State Reconstruction for Industrial Metaverse under Synchronous Asynchronous Short-Packet Transmission", IEEE Transactions on Communications, Accepted/to appear, Mar. 2025.

  • [J79] E. Delfani, N. Pappas, ‘‘Optimizing Information Freshness in Constrained IoT Systems: A Token-Based Approach", IEEE Transactions on Communications, Accepted/to appear, Dec. 2024.

  • [J78] E. Fountoulakis, M. Codreanu, A. Ephremides, N. Pappas, ‘‘Joint Sampling and Transmission Policies for Minimizing Cost under AoI Constraints", Entropy, Accepted/to appear, Nov. 2024.

  • [J77] G. Karevvanavar, H. Pable, Om Patil, R. V. Bhat, N. Pappas, ‘‘Version Age of Information Minimization over Fading Broadcast Channels", IEEE Transactions on Wireless Communications, Accepted/to appear, Nov. 2024.

  • [J76] J. Cao, E. Kurniawan, A. Boonkajay, N. Pappas, S. Sun, P. Popovski, ‘‘Goal-Oriented Communication, Estimation, and Control over Bidirectional Wireless Links", IEEE Transactions on Communications Accepted/to appear, Oct. 2024.

  • [J75] E. Delfani, G. Stamatakis, N. Pappas, ‘‘State-Aware Timeliness in Energy Harvesting IoT Systems Monitoring a Markovian Source", IEEE Transactions on Green Communications and Networking, Accepted/to appear, Oct. 2024.

  • [J74] E. Delfani, N. Pappas, ‘‘Version Age-Optimal Cached Status Updates in a Gossiping Network with Energy Harvesting Sensor", IEEE Transactions on Communications, Accepted/to appear, Sept. 2024.

  • [J73] F. Zhao, N. Pappas, C. Ma, X. Sun T. Q. S. Quek, H. Yang, ‘‘Age-Threshold Slotted ALOHA for Optimizing Information Freshness in Mobile Networks", IEEE Transactions on Wireless Communications, Accepted/to appear, Aug. 2024.

  • [J72] Z. Chen, T. Yang, N. Pappas, H. Yang, Z. Tian, M. Wang, T. Quek, ‘‘Improving Information Freshness via Multi-Sensor Parallel Status Updating", IEEE Transactions on Communications, Accepted/to appear, June 2024.

  • [J71] Z. Chen, K. Lang, N. Pappas, H. Yang, M. Wang, Z. Tian, T. Quek, ‘‘Timeliness of Status Update System: The Effect of Parallel Transmission Using Heterogeneous Updating Devices", IEEE Transactions on Communications, Accepted/to appear, May 2024.

  • [J70] N. Nomikos, T. Charalambous, R. Wichman, Y. Pignolet, N. Pappas, “On the Interplay Between Deadline-Constrained Traffic and the Number of Allowed Retransmissions in Random Access Networks”, Entropy, 2024.

  • [J69] H. Zhou, X. Liu, Y. Deng, N. Pappas, and A. Nallanathan, ‘‘Goal-Oriented Semantic Communications for 6G Networks", IEEE Internet of Things Magazine, vol. 7, no. 5, Sept. 2024.

  • [J68] P. Agheli, N. Pappas, M. Kountouris, ‘‘Goal-Oriented Multiple Access Connectivity for Networked Intelligent Systems", IEEE Communications Letters, vol. 28, no. 8, Aug. 2024.

  • [J67] P. Agheli, N. Pappas, M. Kountouris, ‘‘Semantic Filtering and Source Coding in Distributed Wireless Monitoring Systems", IEEE Transactions on Communications, vol. 72, no. 6, June 2024.

  • [J66] 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", IEEE Transactions on Mobile Computing, vol. 23, no. 6, June 2024.

  • [J65] M. Salimnejad, M. Kountouris, N. Pappas, ‘‘Real-time Reconstruction of Markov Sources and Remote Actuation over Wireless Channels", IEEE Transactions on Communications, vol. 72, no. 5, May 2024.

  • [J64] S. Trevlakis, N. Pappas, A. Boulogeorgos, ‘‘Toward Natively Intelligent Semantic Communications and Networking", IEEE Open Journal of Communications Society, vol. 5, Feb. 2024.

  • [J63] G. Stamatakis, N. Pappas, A. Fragkiadakis, N. Petroulakis, A. Traganitis, ‘‘Semantics-Aware Active Fault Detection in Status Updating Systems", IEEE Open Journal of Communications Society, vol. 5, Feb. 2024.

  • [J62] 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", IEEE Transactions on Wireless Communications, vol. 22, no. 11, Nov. 2023.

  • [J61] M. Salimnejad, M. Kountouris, N. Pappas, ‘‘State-aware Real-time Tracking and Remote Reconstruction of a Markov Source” IEEE/KICS Journal of Communications and Networks (JCN), vol. 25, no. 5, Oct. 2023.

  • [J60] E. Fountoulakis, N. Pappas, M. Kountouris, ‘‘Goal-oriented Policies for Cost of Actuation Error Minimization in Wireless Autonomous Systems", IEEE Communications Letters, vol. 27, no. 9, Sept. 2023.

  • [J59] D. Kumar, P. Mohapatra, N. Pappas, ‘‘Short Packet Communication Over A Two-user Rayleigh Fading Z-Interference Channel: From Stability Region to the Age of Information", IEEE Open Journal of Communications Society, Vol. 4, Aug. 2023.

  • [J58] 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", IEEE Communications Letters, vol. 27, no. 7, July 2023.

  • [J57] E. Fountoulakis, T. Charalambous, A. Ephremides, N. Pappas, ‘‘Scheduling Policies for AoI Minimization with Timely Throughput Constraints", IEEE Transactions on Communications, vol. 71, no. 7, July 2023.

  • [J56] Z. Yue, H. Yang, M. Zhang, N. Pappas, ‘‘Age of Information under Frame Slotted ALOHA-Based Status Updating Protocol", IEEE Journal on Selected Areas in Communications - xURLLC in 6G: Next Generation Ultra-Reliable and Low-Latency Communications, vol. 41, no. 7, July 2023.

  • [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.