Article
Engineering, Electrical & Electronic
Jiayu Zhou, Deli Qiao, Haifeng Qian
Summary: This paper investigates secure communication in buffer-aided cooperative wireless networks with one eavesdropper. Two cooperative secure transmission schemes are proposed to improve secrecy throughput and secrecy outage probability. Theoretical analysis and numerical results demonstrate that the proposed schemes outperform benchmark schemes in terms of secrecy throughput and secrecy outage probability.
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
(2022)
Article
Computer Science, Information Systems
Fahimeh Fazel, Jamshid Abouei, Muhammad Jaseemuddin, Alagan Anpalagan, Konstantinos N. Plataniotis
Summary: This article discusses an ultradense heterogeneous network consisting of cache-enabled UAVs and IMDs receiving contents through PD-NOMA protocol. By optimizing the number of UAVs, their placements, and cache probabilities, the network aims to maximize secure cache throughput. Various algorithms are proposed to achieve this goal effectively.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Telecommunications
Dongming Li, Xuan Yang, Fuhui Zhou, Dawei Wang, Naofal Al-Dhahir
Summary: This paper proposes a secrecy rate-energy efficient UAV relay mode adaptation scheme to enhance wireless transmission security. The proposed scheme models the secrecy energy efficiency and optimizes the mode adaptation ratios under both secrecy rate-prioritized and energy-saving criteria. Experimental results show that the proposed scheme achieves higher secrecy energy efficiency compared to traditional schemes.
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING
(2023)
Article
Computer Science, Theory & Methods
Shuangrui Zhao, Jia Liu, Yulong Shen, Xiaohong Jiang, Norio Shiratori
Summary: This paper focuses on secure and energy-efficient precoding design for MIMO two-way relay systems with an untrusted relay. A hierarchical theoretical framework is developed to solve the optimal precoding design problem, which significantly improves system performance according to extensive numerical results.
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
(2021)
Article
Computer Science, Information Systems
Jia Xie, Zhou Zhang, Saman Atapattu, Yan Ye, Hailin Zhang
Summary: This letter investigates optimal channel access strategies to improve secure communications over a distributed cooperative wireless network. It proposes an optimal channel access strategy using direct transmission, cooperative AF relaying, or cooperative jamming in an adaptive manner. The solution is rigorously proven to be optimal and a distributed channel access algorithm based on the pure threshold structure is provided.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Xiao Jiang, Peng Li, Bin Li, Yulong Zou, Ruchuan Wang
Summary: This paper investigates the secrecy performance of a spectrum sharing network and proposes two intelligent jamming strategies to improve the physical layer security. Numerical results show that the secrecy performance of the optimal jammer selection scheme is better than the suboptimal jammer selection scheme and non-jammer selection scheme in the low channel power gain region.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Cheng Zhang, Xuening Liao, Zhenqiang Wu, Guoyong Qiu, Zitong Chen, Zhiliang Yu
Summary: This paper investigates the problem of buffer-aided relay selection to achieve reliable and secure communications in a two-hop amplify-and-forward (AF) network with an eavesdropper. The study proposes a buffer-aided relay selection scheme based on deep Q-learning (DQL) that considers both reliability and security. Simulation results show that the proposed scheme outperforms the max-ratio scheme in terms of secrecy outage probability (SOP), indicating that the two-hop wireless relay network can achieve reliable and secure communications using the proposed scheme.
Article
Computer Science, Information Systems
Lu Lv, Zan Li, Haiyang Ding, Yuchen Zhou, Jian Chen
Summary: This paper investigates the physical layer security issue of coordinated direct and untrusted relay transmissions and proposes two novel interference-assisted jamming schemes to enhance the security and rate of uplink and downlink transmissions.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Physics, Multidisciplinary
Manos Athanasakos, George Karagiannidis
Summary: This paper introduces a technique based on polar coding for the primitive relay wiretap channel, allowing the relay to intelligently decide whether to cooperate or not for information-theoretic security.
Article
Computer Science, Information Systems
Xuening Liao, Zhenqiang Wu, Yuanyu Zhang, Xiaohong Jiang
Summary: This paper studies buffer-aided relay selection for achieving physical layer security in two-hop wireless networks with limited packet lifetime. The proposed scheme achieves a slightly higher SOP than the typical scheme, but greatly reduces the network's PDP.
Article
Engineering, Electrical & Electronic
Omer Waqar, Hina Tabassum, Raviraj Adve
Summary: In this study, an amplify-and-forward relay network with a wireless-powered jammer is considered to confuse eavesdroppers, and a new secure beamforming scheme is proposed to achieve near-optimal secrecy capacity for a large number of antennas at the source. It is shown that the proposed beamforming vector significantly outperforms traditional energy beamforming and information beamforming vectors in terms of secrecy rate, with a tight closed-form approximation derived for the ergodic secrecy rate for a large number of antennas. Numerical examples and simulations validate the analytical results.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Majid H. Khoshafa, Telex M. N. Ngatched, Mohamed H. Ahmed
Summary: This paper investigates the physical layer security of inband underlay Device-to-Device (D2D) communication where direct link is not available. Optimal and suboptimal relay selections are utilized to secure the transmission and secrecy performance is analyzed. The results show that increasing the number of relays enhances the security performance of the communication.
Article
Telecommunications
Sajad Poursajadi, Mohammad Hossein Madani
Summary: This paper investigates the physical layer security of vehicular communications, proposing a Generalized Optimal Relay Selection (GORS) scheme and an Adaptive Optimal Relay Selection (AORS) scheme. The analysis considers two scenarios with different availability of channel state information, and Monte Carlo simulations validate the results.
VEHICULAR COMMUNICATIONS
(2021)
Article
Computer Science, Theory & Methods
Yulong Nie, Xiaolong Lan, Yong Liu, Qingchun Chen, Gaojie Chen, Lisheng Fan, Dong Tang
Summary: This paper proposed an energy-harvesting based secure two-way relay network with a secure bidirectional relaying scheme based on time division broadcast to address the presence of potential eavesdroppers. By formulating a secure sum-rate maximization problem and utilizing the Lyapunov optimization framework, a security-aware adaptive transmission scheme was developed to jointly adapt transmission mode selection, power allocation, and security rate allocation according to channel/buffer/energy state information. The analysis results showed a trade-off among transmission delay, transmit power consumption, and achievable secure sum-rate, emphasizing the critical factor of channel condition between the energy-constrained relay and the potential eavesdropper on the long-term average secrecy rate performance.
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
(2021)
Article
Computer Science, Information Systems
Maryam Fazeli, Alireza Keshavarz-Haddad, Ali Jamshidi
Summary: This research proposes a smart decode-and-forward max-min relay selection scheme based on source-destination links' outage status and selected relays, aiming to enhance communication system diversity and maximize the expected number of recovered packets in various situations. Analytical and simulation results show that the scheme outperforms existing network coded cooperation schemes.
Editorial Material
Engineering, Electrical & Electronic
Kunlun Wang, Yang Yang, Jiong Jin, Tao Zhang, Arumugam Nallanathan, Chintha Tellambura, Bijan Jabbari
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Wenhan Shen, Zhijin Qin, Arumugam Nallanathan
Summary: Reconfigurable intelligent surface (RIS) allows the configuration of the propagation environment. Channel estimation is essential in RIS-aided communication systems. In a RIS-aided multi-user MIMO-OFDM system, the channels involved are high-dimensional and have complex statistics. Implementing the optimal MMSE with integration computation is impractical, so a convolutional neural network called SRDnNet is proposed to accurately estimate channels by modeling channel state information (CSI) estimation as an image super-resolution problem.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yan Liu, Yansha Deng, Hui Zhou, Maged Elkashlan, Arumugam Nallanathan
Summary: This study proposes a learning framework for signature-based GF-NOMA in mURLLC service, considering multiple access signature collision, UE detection, and data decoding. The framework aims to maximize the number of successfully served UEs under latency constraint using a real-time DDQN for repetition value configuration and a CMA-DQN for optimizing repetition values and CTU numbers. The results show the superior performance of CMA-DQN over LE-URC in heavy traffic and its ability to dynamically configure mURLLC service in the long term.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Aikaterini I. Griva, Achilles D. Boursianis, Shaohua Wan, Panagiotis Sarigiannidis, Konstantinos E. Psannis, George Karagiannidis, Sotirios K. Goudos
Summary: The implementation of smart networks has been greatly advanced by the development of IoT, with LoRa being a prominent technology due to its long-distance transmission capabilities with low power consumption. This study simulated various environments to assess network performance based on different factors and parameters. Path loss model, deployment area size, transmission power, spreading factor, number of nodes and gateways, and antenna gain significantly affect the energy consumption and data extraction rate of LoRa networks. The research performed simulations using the FLoRa framework in OMNeT++, investigating rural and urban environments, as well as a parking area model. The results emphasize the importance of optimizing key parameters for the deployment of smart networks.
Article
Engineering, Electrical & Electronic
Jiacheng Yao, Jindan Xu, Wei Xu, Chau Yuen, Xiaohu You
Summary: To fully exploit the additional dimension brought by recon-figurable intelligent surface (RIS), information can be modulated upon RIS phases to send extra information with increased communication rate. In this paper, a novel superimposed RIS-phase modulation (SRPM) scheme is proposed, which transfers extra messages by superimposing information-bearing phase offsets to conventionally optimized RIS phases. The theoretical analysis shows that SRPM achieves reliable communication of more bits and has a diversity order of 21.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Muxin He, Jindan Xu, Wei Xu, Hong Shen, Ning Wang, Chunming Zhao
Summary: Reconfigurable intelligent surfaces (RISs) can create favorable wireless environments for mmWave bands by combating attenuation and blockages. This paper presents a quasi-static broad coverage RIS design that reduces overhead by using statistical CSI. A design framework is proposed to synthesize the RIS's power pattern for customized broad coverage requirements. The proposed quasi-static broad coverage method outperforms the design method based on instantaneous CSI even when considering channel estimation overhead. Numerical simulations are conducted to validate the observations.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Kunlun Wang, Dusit Niyato, Wen Chen, Arumugam Nallanathan
Summary: This paper proposes a cell-free massive MIMO-aided computing system by deploying multi-tier computing nodes to improve computation performance. By investigating computational latency and energy consumption, we formulate a total cost minimization problem to design bandwidth and task allocation. Simulation results demonstrate that our proposed task offloading scheme outperforms benchmark schemes.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yan Liu, Hui Zhou, Yansha Deng, Arumugam Nallanathan
Summary: The research on 6G communication is still in its early stage and URLLC remains an important service. However, the severe spectrum scarcity in 6G networks poses challenges to achieving URLLC requirements, especially in NR-U networks where interference and collisions among multiple access technologies occur. This paper presents centralized deep reinforcement learning (CDRL) and federated DRL (FDRL) frameworks to optimize the downlink URLLC transmission in NR-U and WiFi coexistence systems by adjusting energy detection thresholds dynamically. The results show improved reliability in the NR-U system, but the CDRL approach sacrifices the reliability of the WiFi system. To address this, the fairness aspect is considered in the modified CDRL framework to ensure the reliability of both systems.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Narendra Vishwakarma, R. Swaminathan, Panagiotis D. D. Diamantoulakis, George K. K. Karagiannidis
Summary: The paper proposes an optical reflecting surface (ORS)-assisted free space optics (FSO) communication system based on optical space shift keying (OSSK) technique, which can provide improved link reliability and enhanced coverage area. The channel statistics and performance metrics such as average bit error rate (BER) and ergodic capacity are derived. Numerical results are provided to verify the theoretical analysis of the system.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Haijun Zhang, Hongyu Wang, Yabo Li, Keping Long, Arumugam Nallanathan
Summary: This paper proposes a dynamic resource allocation scheme for task-oriented semantic communication networks based on deep reinforcement learning, which allows data with richer semantic information to preferentially occupy limited communication resources to improve long-term transmission efficiency.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Konstantinos G. Rallis, Vasilis K. Papanikolaou, Panagiotis D. Diamantoulakis, Sotiris A. Tegos, Alexis A. Dowhuszko, Mohammad-Ali Khalighi, George K. Karagiannidis
Summary: This paper investigates an indoor wireless network that aggregates communication resources in visible light and radio-frequency bands. A non-orthogonal multiple access scheme is introduced for visible light communication downlink, enhancing the data rate of cell-edge users through cooperative communications over RF sidelinks. The optimal resource allocation strategy is derived for maximizing energy efficiency. Additionally, a weighted energy efficiency metric is proposed for assessing the performance of the aggregated VLC/RF network.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Wenqi Zhou, Junjuan Xia, Fasheng Zhou, Lisheng Fan, Xianfu Lei, Arumugam Nallanathan, George K. Karagiannidis
Summary: This paper investigates a multiuser cache-enabled vehicular mobile edge computing (MEC) network, and proposes a solution to the critical challenge of optimizing the system design and performance by maximizing the profit of the edge server (ES) and jointly exploiting caching and computing resources.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Xiaotian Jiang, Kai Liang, Xiaoli Chu, Cheng Li, George K. Karagiannidis
Summary: This letter investigates the multiplexing of enhanced mobile broadband (eMBB) and ultra-reliable low-latency communications (URLLC) services in a wireless powered communication network. The proposed algorithm achieves a higher eMBB sum rate than the existing schemes by using preemptive puncturing to multiplex URLLC traffic onto eMBB transmission and a deep reinforcement learning-based approach to jointly allocate subcarriers, time, and energy.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Computer Science, Information Systems
Nikos A. A. Mitsiou, Sotiris A. A. Tegos, Panagiotis D. D. Diamantoulakis, Panagiotis G. G. Sarigiannidis, George K. K. Karagiannidis
Summary: To address the inefficiency in terms of resource utilization of grant-free (GF) protocols, the fast uplink (FU) grant medium-access protocol has been proposed. In this letter, we design a proactive wireless power transfer (WPT) framework for FU grant zero-energy massive machine-type communication. Specifically, zero-energy devices (ZEDs) first harvest energy during the WPT phase and then transmit data based on the FU grant protocol. Moreover, a multi-arm bandit traffic prediction scheme is adopted. Simulation results show that the proposed scheme outperforms GF access.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Computer Science, Theory & Methods
Xiangjun Ma, Xianfu Lei, Xiangyun Zhou, Xiaohu Tang
Summary: This paper presents the first performance analysis of physical layer downlink secure transmissions in a scalable cell-free massive MIMO (SCF-mMIMO) system. The locations of the access points (APs), user equipments (UEs), and eavesdroppers (Eves) are modeled as independent homogeneous Poisson point processes (HPPPs) using a stochastic geometry approach. Maximum ratio transmission (MRT) and null-space artificial noise are used for sending confidential messages and enhancing secrecy. The analytical characterization of secrecy performance provides insights on design and the benefits of artificial noise insertion.
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
(2023)
