Search Results for author: Kezhi Wang

Found 40 papers, 1 papers with code

Large Language Model Enhanced Multi-Agent Systems for 6G Communications

no code implementations13 Dec 2023 Feibo Jiang, Li Dong, Yubo Peng, Kezhi Wang, Kun Yang, Cunhua Pan, Dusit Niyato, Octavia A. Dobre

The rapid development of the Large Language Model (LLM) presents huge opportunities for 6G communications, e. g., network optimization and management by allowing users to input task requirements to LLMs by nature language.

Language Modelling Large Language Model +2

Large AI Model Empowered Multimodal Semantic Communications

no code implementations3 Sep 2023 Feibo Jiang, Yubo Peng, Li Dong, Kezhi Wang, Kun Yang, Cunhua Pan, Xiaohu You

To this end, we propose a Large AI Model-based Multimodal SC (LAM-MSC) framework, in which we first present the MLM-based Multimodal Alignment (MMA) that utilizes the MLM to enable the transformation between multimodal and unimodal data while preserving semantic consistency.

Language Modelling Large Language Model

LAMBO: Large Language Model Empowered Edge Intelligence

no code implementations29 Aug 2023 Li Dong, Feibo Jiang, Yubo Peng, Kezhi Wang, Kun Yang, Cunhua Pan, Robert Schober

Next-generation edge intelligence is anticipated to bring huge benefits to various applications, e. g., offloading systems.

Active Learning Decision Making +3

Training Latency Minimization for Model-Splitting Allowed Federated Edge Learning

no code implementations21 Jul 2023 Yao Wen, Guopeng Zhang, Kezhi Wang, Kun Yang

To alleviate the shortage of computing power faced by clients in training deep neural networks (DNNs) using federated learning (FL), we leverage the edge computing and split learning to propose a model-splitting allowed FL (SFL) framework, with the aim to minimize the training latency without loss of test accuracy.

Edge-computing Federated Learning

Large AI Model-Based Semantic Communications

no code implementations7 Jul 2023 Feibo Jiang, Yubo Peng, Li Dong, Kezhi Wang, Kun Yang, Cunhua Pan, Xiaohu You

Semantic communication (SC) is an emerging intelligent paradigm, offering solutions for various future applications like metaverse, mixed-reality, and the Internet of everything.

Mixed Reality

Over-the-Air Federated Averaging with Limited Power and Privacy Budgets

no code implementations5 May 2023 Na Yan, Kezhi Wang, Cunhua Pan, Kok Keong Chai, Feng Shu, Jiangzhou Wang

We aim to improve the learning performance by jointly designing the device scheduling, alignment coefficient, and the number of aggregation rounds of federated averaging (FedAvg) subject to sum power and privacy constraints.

Federated Learning Scheduling

Beyond 5G Networks: Integration of Communication, Computing, Caching, and Control

no code implementations26 Dec 2022 Musbahu Mohammed Adam, Liqiang Zhao, Kezhi Wang, Zhu Han

In recent years, the exponential proliferation of smart devices with their intelligent applications poses severe challenges on conventional cellular networks.

Device Scheduling for Over-the-Air Federated Learning with Differential Privacy

no code implementations31 Oct 2022 Na Yan, Kezhi Wang, Cunhua Pan, Kok Keong Chai

The scheme schedules the devices with better channel conditions in the training to avoid the problem that the alignment coefficient is limited by the device with the worst channel condition in the system.

Federated Learning Scheduling

Joint Optimization of Deployment and Trajectory in UAV and IRS-Assisted IoT Data Collection System

no code implementations27 Oct 2022 Li Dong, Zhibin Liu, Feibo Jiang, Kezhi Wang

To address this issue, we propose a joint optimization framework of deployment and trajectory (JOLT), where an adaptive whale optimization algorithm (AWOA) is applied to optimize the deployment of the UAV, and an elastic ring self-organizing map (ERSOM) is introduced to optimize the trajectory of the UAV.

Toward Secure and Private Over-the-Air Federated Learning

no code implementations14 Oct 2022 Na Yan, Kezhi Wang, Kangda Zhi, Cunhua Pan, Kok Keong Chai, H. Vincent Poor

In this paper, a novel secure and private over-the-air federated learning (SP-OTA-FL) framework is studied where noise is employed to protect data privacy and system security.

Federated Learning Scheduling +1

Deep Reinforcement Learning-Based Long-Range Autonomous Valet Parking for Smart Cities

no code implementations23 Sep 2021 Muhammad Khalid, Liang Wang, Kezhi Wang, Cunhua Pan, Nauman Aslam, Yue Cao

In this paper, to reduce the congestion rate at the city center and increase the quality of experience (QoE) of each user, the framework of long-range autonomous valet parking (LAVP) is presented, where an Autonomous Vehicle (AV) is deployed in the city, which can pick up, drop off users at their required spots, and then drive to the car park out of city center autonomously.

reinforcement-learning Reinforcement Learning (RL)

Private and Utility Enhanced Recommendations with Local Differential Privacy and Gaussian Mixture Model

no code implementations26 Feb 2021 Jeyamohan Neera, Xiaomin Chen, Nauman Aslam, Kezhi Wang, Zhan Shu

At the SP, The MoG model estimates the noise added to perturbed ratings and the MF algorithm predicts missing ratings.

Recommendation Systems

Self-Sustainable Reconfigurable Intelligent Surface Aided Simultaneous Terahertz Information and Power Transfer (STIPT)

no code implementations8 Feb 2021 Yijin Pan, Kezhi Wang, Cunhua Pan, Huiling Zhu, Jiangzhou Wang

This paper proposes a new simultaneous terahertz (THz) information and power transfer (STIPT) system, which is assisted by reconfigurable intelligent surface (RIS) for both the information data and power transmission.

Secure Wireless Communication in RIS-Aided MISO Systems with Hardware Impairments

no code implementations23 Dec 2020 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Zhangjie Peng

In this paper, we study the robust transmission design for a reconfigurable intelligent surface (RIS)-aided secure communication system in the presence of transceiver hardware impairments.

Information Theory Signal Processing Information Theory

Outage Constrained Robust Transmission Design for IRS-aided Secure Communications with Direct Communication Links

no code implementations19 Nov 2020 Sheng Hong, Cunhua Pan, Gui Zhou, Hong Ren, Kezhi Wang

In this paper, we investigate the robust outage constrained transmission design for an intelligent reflecting surface (IRS) aided secure communication system.

Reconfigurable Intelligent Surfaces for 6G Systems: Principles, Applications, and Research Directions

no code implementations9 Nov 2020 Cunhua Pan, Hong Ren, Kezhi Wang, Jonas Florentin Kolb, Maged Elkashlan, Ming Chen, Marco Di Renzo, Yang Hao, Jiangzhou Wang, A. Lee Swindlehurst, Xiaohu You, Lajos Hanzo

Reconfigurable intelligent surfaces (RISs) or intelligent reflecting surfaces (IRSs), are regarded as one of the most promising and revolutionizing techniques for enhancing the spectrum and/or energy efficiency of wireless systems.

UAV-Assisted and Intelligent Reflecting Surfaces-Supported Terahertz Communications

no code implementations27 Oct 2020 Yijin Pan, Kezhi Wang, Cunhua Pan, Huiling Zhu, Jiangzhou Wang

In this paper, unmanned aerial vehicles (UAVs) and intelligent reflective surface (IRS) are utilized to support terahertz (THz) communications.

Power Scaling Law Analysis and Phase Shift Optimization of RIS-aided Massive MIMO Systems with Statistical CSI

no code implementations26 Oct 2020 Kangda Zhi, Cunhua Pan, Hong Ren, Kezhi Wang

We consider the Rician channel model and exploit the long-time statistical CSI to design the phase shifts of the RIS, while the maximum ratio combination (MRC) technique is applied for the active beamforming at the base station (BS) relying on the instantaneous CSI.

Sliding Differential Evolution Scheduling for Federated Learning in Bandwidth-Limited Networks

no code implementations18 Oct 2020 Yifan Luo, Jindan Xu, Wei Xu, Kezhi Wang

Federated learning (FL) in a bandwidth-limited network with energy-limited user equipments (UEs) is under-explored.

Federated Learning Scheduling

Multi-Agent Deep Reinforcement Learning Based Trajectory Planning for Multi-UAV Assisted Mobile Edge Computing

no code implementations23 Sep 2020 Liang Wang, Kezhi Wang, Cunhua Pan, Wei Xu, Nauman Aslam, Lajos Hanzo

An unmanned aerial vehicle (UAV)-aided mobile edge computing (MEC) framework is proposed, where several UAVs having different trajectories fly over the target area and support the user equipments (UEs) on the ground.

Edge-computing Fairness +1

Stochastic Learning-Based Robust Beamforming Design for RIS-Aided Millimeter-Wave Systems in the Presence of Random Blockages

no code implementations21 Sep 2020 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Maged Elkashlan, Marco Di Renzo

To enhance the robustness of hybrid analog-digital beamforming in the presence of random blockages, we formulate a stochastic optimization problem based on the minimization of the sum outage probability.

Stochastic Optimization

Uplink Achievable Rate of Intelligent Reflecting Surface-Aided Millimeter-Wave Communications with Low-Resolution ADC and Phase Noise

no code implementations2 Aug 2020 Kangda Zhi, Cunhua Pan, Hong Ren, Kezhi Wang

In this paper, we derive the uplink achievable rate expression of intelligent reflecting surface (IRS)-aided millimeter-wave (mmWave) systems, taking into account the phase noise at IRS and the quantization error at base stations (BSs).

Quantization

A Review on Computational Intelligence Techniques in Cloud and Edge Computing

no code implementations27 Jul 2020 Muhammad Asim, Yong Wang, Kezhi Wang, Pei-Qiu Huang

These optimization problems usually have complex properties, such as non-convexity and NP-hardness, which may not be addressed by the traditional convex optimization-based solutions.

Cloud Computing Edge-computing +1

Joint Transmit Power and Placement Optimization for URLLC-enabled UAV Relay Systems

no code implementations20 Jul 2020 Hong Ren, Cunhua Pan, Kezhi Wang, Wei Xu, Maged Elkashlan, Arumugam Nallanathan

This letter considers an unmanned aerial vehicle (UAV)-enabled relay communication system for delivering latency-critical messages with ultra-high reliability, where the relay is operating under amplifier-and-forward (AF) mode.

Joint Trajectory and Passive Beamforming Design for Intelligent Reflecting Surface-Aided UAV Communications: A Deep Reinforcement Learning Approach

1 code implementation16 Jul 2020 Liang Wang, Kezhi Wang, Cunhua Pan, Nauman Aslam

In this paper, the intelligent reflecting surface (IRS)-aided unmanned aerial vehicle (UAV) communication system is studied, where the UAV is deployed to serve the user equipment (UE) with the assistance of multiple IRSs mounted on several buildings to enhance the communication quality between UAV and UE.

Fairness

User Cooperation for IRS-aided Secure SWIPT MIMO Systems

no code implementations9 Jun 2020 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Kok Keong Chai, Kai-Kit Wong

In this paper, intelligent reflecting surface (IRS) is proposed to enhance the physical layer security in the Rician fading channel where the angular direction of the eavesdropper is aligned with a legitimate user.

Distributed Resource Scheduling for Large-Scale MEC Systems: A Multi-Agent Ensemble Deep Reinforcement Learning with Imitation Acceleration

no code implementations21 May 2020 Feibo Jiang, Li Dong, Kezhi Wang, Kun Yang, Cunhua Pan

We consider the optimization of distributed resource scheduling to minimize the sum of task latency and energy consumption for all the Internet of things devices (IoTDs) in a large-scale mobile edge computing (MEC) system.

Decision Making Edge-computing +1

Robust Transmission Design for Intelligent Reflecting Surface Aided Secure Communication Systems with Imperfect Cascaded CSI

no code implementations24 Apr 2020 Sheng Hong, Cunhua Pan, Hong Ren, Kezhi Wang, Kok Keong Chai, Arumugam Nallanathan

To minimize the transmit power, the beamforming vector at the transmitter, the AN covariance matrix, and the IRS phase shifts are jointly optimized subject to the outage rate probability constraints under the statistical cascaded channel state information (CSI) error model that usually models the channel estimation error.

Robust Beamforming Design for Intelligent Reflecting Surface Aided Cognitive Radio Systems with Imperfect Cascaded CSI

no code implementations9 Apr 2020 Lei Zhang, Cunhua Pan, Yu Wang, Hong Ren, Kezhi Wang

Simulation results verify the efficiency of the proposed algorithms and reveal the impacts of CSI uncertainties on ST's minimum transmit power and feasibility rate of the optimization problems.

Artificial-Noise-Aided Secure MIMO Wireless Communications via Intelligent Reflecting Surface

no code implementations17 Feb 2020 Sheng Hong, Cunhua Pan, Hong Ren, Kezhi Wang, Arumugam Nallanathan

To tackle it, we propose to utilize the block coordinate descent (BCD) algorithm to alternately update the TPC matrix, AN covariance matrix, and phase shifts while keeping SR non-decreasing.

AI Driven Heterogeneous MEC System with UAV Assistance for Dynamic Environment -- Challenges and Solutions

no code implementations11 Feb 2020 Feibo Jiang, Kezhi Wang, Li Dong, Cunhua Pan, Wei Xu, Kun Yang

By taking full advantage of Computing, Communication and Caching (3C) resources at the network edge, Mobile Edge Computing (MEC) is envisioned as one of the key enablers for the next generation networks.

Decision Making Edge-computing +3

Stacked Auto Encoder Based Deep Reinforcement Learning for Online Resource Scheduling in Large-Scale MEC Networks

no code implementations24 Jan 2020 Feibo Jiang, Kezhi Wang, Li Dong, Cunhua Pan, Kun Yang

An online resource scheduling framework is proposed for minimizing the sum of weighted task latency for all the Internet of things (IoT) users, by optimizing offloading decision, transmission power and resource allocation in the large-scale mobile edge computing (MEC) system.

Data Compression Edge-computing +1

A Framework of Robust Transmission Design for IRS-aided MISO Communications with Imperfect Cascaded Channels

no code implementations20 Jan 2020 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Arumugam Nallanathan

Specifically, the transmit power minimization problems are formulated subject to the worst-case rate constraints under the bounded CSI error model and the rate outage probability constraints under the statistical CSI error model, respectively.

Robust Beamforming Design for Intelligent Reflecting Surface Aided MISO Communication Systems

no code implementations14 Nov 2019 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Marco Di Renzo, Arumugam Nallanathan

In this paper, we study the worst-case robust beamforming design for an IRS-aided multiuser multiple-input single-output (MU-MISO) system under the assumption of imperfect CSI.

Deep Reinforcement Learning Based Dynamic Trajectory Control for UAV-assisted Mobile Edge Computing

no code implementations10 Nov 2019 Liang Wang, Kezhi Wang, Cunhua Pan, Wei Xu, Nauman Aslam, Arumugam Nallanathan

In this paper, we consider a platform of flying mobile edge computing (F-MEC), where unmanned aerial vehicles (UAVs) serve as equipment providing computation resource, and they enable task offloading from user equipment (UE).

Edge-computing reinforcement-learning +1

Bit-level Optimized Neural Network for Multi-antenna Channel Quantization

no code implementations24 Sep 2019 Chao Lu, Wei Xu, Shi Jin, Kezhi Wang

Quantized channel state information (CSI) plays a critical role in precoding design which helps reap the merits of multiple-input multiple-output (MIMO) technology.

Information Theory Signal Processing Information Theory

Intelligent Reflecting Surface Aided Multigroup Multicast MISO Communication Systems

no code implementations10 Sep 2019 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Arumugam Nallanathan

We aim for maximizing the sum rate of all the multicasting groups by the joint optimization of the precoding matrix at the base station (BS) and the reflection coefficients at the IRS under both the power and unit-modulus constraint.

RL-Based User Association and Resource Allocation for Multi-UAV enabled MEC

no code implementations8 Apr 2019 Liang Wang, Peiqiu Huang, Kezhi Wang, Guopeng Zhang, Lei Zhang, Nauman Aslam, Kun Yang

In this paper, multi-unmanned aerial vehicle (UAV) enabled mobile edge computing (MEC), i. e., UAVE is studied, where several UAVs are deployed as flying MEC platform to provide computing resource to ground user equipments (UEs).

Edge-computing Reinforcement Learning (RL)

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