Search Results for author: Tony Q. S. Quek

Found 59 papers, 5 papers with code

Harnessing the Power of AI-Generated Content for Semantic Communication

no code implementations10 Apr 2024 Yiru Wang, Wanting Yang, Zehui Xiong, Yuping Zhao, Tony Q. S. Quek, Zhu Han

Recognizing the transformative capabilities of AI-generated content (AIGC) technologies in content generation, this paper explores a pioneering approach by integrating them into SemCom to address the aforementioned challenges.

Agent-driven Generative Semantic Communication for Remote Surveillance

no code implementations10 Apr 2024 Wanting Yang, Zehui Xiong, Yanli Yuan, Wenchao Jiang, Tony Q. S. Quek, Merouane Debbah

In the era of 6G, featuring compelling visions of intelligent transportation system, digital twins, remote surveillance is poised to become a ubiquitous practice.

Byzantine-resilient Federated Learning With Adaptivity to Data Heterogeneity

no code implementations20 Mar 2024 Shiyuan Zuo, Xingrun Yan, Rongfei Fan, Han Hu, Hangguan Shan, Tony Q. S. Quek

This paper deals with federated learning (FL) in the presence of malicious Byzantine attacks and data heterogeneity.

Federated Learning

Adaptive Federated Learning Over the Air

no code implementations11 Mar 2024 Chenhao Wang, Zihan Chen, Nikolaos Pappas, Howard H. Yang, Tony Q. S. Quek, H. Vincent Poor

In contrast, an Adam-like algorithm converges at the $\mathcal{O}( 1/T )$ rate, demonstrating its advantage in expediting the model training process.

Federated Learning

RIS-Enhanced Cognitive Integrated Sensing and Communication: Joint Beamforming and Spectrum Sensing

no code implementations10 Feb 2024 Yongqing Xu, Yong Li, Tony Q. S. Quek

Cognitive radio (CR) and integrated sensing and communication (ISAC) are both critical technologies for the sixth generation (6G) wireless networks.

Spectral Co-Distillation for Personalized Federated Learning

1 code implementation NeurIPS 2023 Zihan Chen, Howard H. Yang, Tony Q. S. Quek, Kai Fong Ernest Chong

Personalized federated learning (PFL) has been widely investigated to address the challenge of data heterogeneity, especially when a single generic model is inadequate in satisfying the diverse performance requirements of local clients simultaneously.

Personalized Federated Learning

OFDM-Based Digital Semantic Communication with Importance Awareness

no code implementations4 Jan 2024 Chuanhong Liu, Caili Guo, Yang Yang, Wanli Ni, Tony Q. S. Quek

Based on semantic importance, we formulate a sub-carrier and bit allocation problem to maximize communication performance.

Age-Based Scheduling for Mobile Edge Computing: A Deep Reinforcement Learning Approach

1 code implementation1 Dec 2023 Xingqiu He, Chaoqun You, Tony Q. S. Quek

In the traditional definition of AoI, it is assumed that the status information can be actively sampled and directly used.

Edge-computing Reinforcement Learning (RL) +1

Privacy-preserving Federated Primal-dual Learning for Non-convex and Non-smooth Problems with Model Sparsification

no code implementations30 Oct 2023 Yiwei Li, Chien-Wei Huang, Shuai Wang, Chong-Yung Chi, Tony Q. S. Quek

Federated learning (FL) has been recognized as a rapidly growing research area, where the model is trained over massively distributed clients under the orchestration of a parameter server (PS) without sharing clients' data.

Federated Learning Privacy Preserving

Foundation Model Based Native AI Framework in 6G with Cloud-Edge-End Collaboration

no code implementations26 Oct 2023 Xiang Chen, Zhiheng Guo, Xijun Wang, Howard H. Yang, Chenyuan Feng, Junshen Su, Sihui Zheng, Tony Q. S. Quek

Future wireless communication networks are in a position to move beyond data-centric, device-oriented connectivity and offer intelligent, immersive experiences based on task-oriented connections, especially in the context of the thriving development of pre-trained foundation models (PFM) and the evolving vision of 6G native artificial intelligence (AI).

Analysis of Age of Information in Non-terrestrial Networks

no code implementations6 Oct 2023 Yanwu Lu, Howard Yang, Nikolaos Pappas, Giovanni Geraci, Chuan Ma, Tony Q. S. Quek

Our work fills a gap in the literature by providing a comprehensive analysis of AoI in NTN and offers new insights into the performance of LEO satellite networks.

The Role of Federated Learning in a Wireless World with Foundation Models

no code implementations6 Oct 2023 Zihan Chen, Howard H. Yang, Y. C. Tay, Kai Fong Ernest Chong, Tony Q. S. Quek

Foundation models (FMs) are general-purpose artificial intelligence (AI) models that have recently enabled multiple brand-new generative AI applications.

Federated Learning

Semi-Federated Learning: Convergence Analysis and Optimization of A Hybrid Learning Framework

no code implementations4 Oct 2023 Jingheng Zheng, Wanli Ni, Hui Tian, Deniz Gunduz, Tony Q. S. Quek, Zhu Han

To tackle this issue, we propose a semi-federated learning (SemiFL) paradigm to leverage the computing capabilities of both the BS and devices for a hybrid implementation of centralized learning (CL) and FL.

Federated Learning

Optimizing Cache Content Placement in Integrated Terrestrial and Non-terrestrial Networks

no code implementations10 Aug 2023 Feng Wang, Giovanni Geraci, Tony Q. S. Quek

Non-terrestrial networks (NTN) offer potential for efficient content broadcast in remote regions, thereby extending the reach of digital services.

Edge Intelligence Over the Air: Two Faces of Interference in Federated Learning

no code implementations17 Jun 2023 Zihan Chen, Howard H. Yang, Tony Q. S. Quek

Federated edge learning is envisioned as the bedrock of enabling intelligence in next-generation wireless networks, but the limited spectral resources often constrain its scalability.

Federated Learning

Physical-layer Adversarial Robustness for Deep Learning-based Semantic Communications

no code implementations12 May 2023 Guoshun Nan, Zhichun Li, Jinli Zhai, Qimei Cui, Gong Chen, Xin Du, Xuefei Zhang, Xiaofeng Tao, Zhu Han, Tony Q. S. Quek

We argue that central to the success of ESC is the robust interpretation of conveyed semantics at the receiver side, especially for security-critical applications such as automatic driving and smart healthcare.

Adversarial Robustness

Deep Learning and Image Super-Resolution-Guided Beam and Power Allocation for mmWave Networks

no code implementations8 May 2023 Yuwen Cao, Tomoaki Ohtsuki, Setareh Maghsudi, Tony Q. S. Quek

In this paper, we develop a deep learning (DL)-guided hybrid beam and power allocation approach for multiuser millimeter-wave (mmWave) networks, which facilitates swift beamforming at the base station (BS).

Image Super-Resolution

DPP-based Client Selection for Federated Learning with Non-IID Data

no code implementations30 Mar 2023 Yuxuan Zhang, Chao Xu, Howard H. Yang, Xijun Wang, Tony Q. S. Quek

This paper proposes a client selection (CS) method to tackle the communication bottleneck of federated learning (FL) while concurrently coping with FL's data heterogeneity issue.

Federated Learning

Automated Federated Learning in Mobile Edge Networks -- Fast Adaptation and Convergence

no code implementations23 Mar 2023 Chaoqun You, Kun Guo, Gang Feng, Peng Yang, Tony Q. S. Quek

With the obtained FL hyperparameters and resource allocation, we design a MAML-based FL algorithm, called Automated Federated Learning (AutoFL), that is able to conduct fast adaptation and convergence.

Federated Learning Meta-Learning

Hierarchical Personalized Federated Learning Over Massive Mobile Edge Computing Networks

no code implementations19 Mar 2023 Chaoqun You, Kun Guo, Howard H. Yang, Tony Q. S. Quek

Personalized Federated Learning (PFL) is a new Federated Learning (FL) paradigm, particularly tackling the heterogeneity issues brought by various mobile user equipments (UEs) in mobile edge computing (MEC) networks.

Edge-computing Personalized Federated Learning +1

Joint Beamforming for RIS-Assisted Integrated Sensing and Communication Systems

no code implementations3 Mar 2023 Yongqing Xu, Yong Li, J. Andrew Zhang, Marco Di Renzo, Tony Q. S. Quek

However, due to multiple performance metrics used for communication and sensing, the limited degrees-of-freedom (DoF) in optimizing ISAC systems poses a challenge.

Personalizing Federated Learning with Over-the-Air Computations

no code implementations24 Feb 2023 Zihan Chen, Zeshen Li, Howard H. Yang, Tony Q. S. Quek

Additionally, we leverage a bi-level optimization framework to personalize the federated learning model so as to cope with the data heterogeneity issue.

Federated Learning Privacy Preserving

Differentially Private Deep Q-Learning for Pattern Privacy Preservation in MEC Offloading

no code implementations9 Feb 2023 Shuying Gan, Marie Siew, Chao Xu, Tony Q. S. Quek

Mobile edge computing (MEC) is a promising paradigm to meet the quality of service (QoS) requirements of latency-sensitive IoT applications.

Edge-computing Q-Learning

Semi-Synchronous Personalized Federated Learning over Mobile Edge Networks

no code implementations27 Sep 2022 Chaoqun You, Daquan Feng, Kun Guo, Howard H. Yang, Tony Q. S. Quek

Experimental results verify the effectiveness of PerFedS2 in saving training time as well as guaranteeing the convergence of training loss, in contrast to synchronous and asynchronous PFL algorithms.

Personalized Federated Learning Scheduling

Towards Federated Long-Tailed Learning

no code implementations30 Jun 2022 Zihan Chen, Songshang Liu, Hualiang Wang, Howard H. Yang, Tony Q. S. Quek, Zuozhu Liu

Data privacy and class imbalance are the norm rather than the exception in many machine learning tasks.

Federated Learning

FedCorr: Multi-Stage Federated Learning for Label Noise Correction

1 code implementation CVPR 2022 Jingyi Xu, Zihan Chen, Tony Q. S. Quek, Kai Fong Ernest Chong

Although there exist methods in centralized learning for tackling label noise, such methods do not perform well on heterogeneous label noise in FL settings, due to the typically smaller sizes of client datasets and data privacy requirements in FL.

Federated Learning Privacy Preserving

Federated Stochastic Gradient Descent Begets Self-Induced Momentum

no code implementations17 Feb 2022 Howard H. Yang, Zuozhu Liu, Yaru Fu, Tony Q. S. Quek, H. Vincent Poor

Federated learning (FL) is an emerging machine learning method that can be applied in mobile edge systems, in which a server and a host of clients collaboratively train a statistical model utilizing the data and computation resources of the clients without directly exposing their privacy-sensitive data.

Federated Learning

Networking of Internet of UAVs: Challenges and Intelligent Approaches

no code implementations13 Nov 2021 Peng Yang, Xianbin Cao, Tony Q. S. Quek, Dapeng Oliver Wu

Internet of unmanned aerial vehicle (I-UAV) networks promise to accomplish sensing and transmission tasks quickly, robustly, and cost-efficiently via effective cooperation among UAVs.

Distributed Reinforcement Learning for Privacy-Preserving Dynamic Edge Caching

no code implementations20 Oct 2021 Shengheng Liu, Chong Zheng, Yongming Huang, Tony Q. S. Quek

In this paper, a privacy-preserving distributed deep deterministic policy gradient (P2D3PG) algorithm is proposed to maximize the cache hit rates of devices in the MEC networks.

Edge-computing Federated Learning +3

Optimal Distribution Design for Irregular Repetition Slotted ALOHA with Multi-Packet Reception

no code implementations15 Oct 2021 Zhengchuan Chen, Yifan Feng, Chundie Feng, Liang Liang, Yunjian Jia, Tony Q. S. Quek

Associated with multi-packet reception at the access point, irregular repetition slotted ALOHA (IRSA) holds a great potential in improving the access capacity of massive machine type communication systems.

Dynamic Attention-based Communication-Efficient Federated Learning

no code implementations12 Aug 2021 Zihan Chen, Kai Fong Ernest Chong, Tony Q. S. Quek

Federated learning (FL) offers a solution to train a global machine learning model while still maintaining data privacy, without needing access to data stored locally at the clients.

Federated Learning

Adaptive Anomaly Detection for Internet of Things in Hierarchical Edge Computing: A Contextual-Bandit Approach

no code implementations9 Aug 2021 Mao V. Ngo, Tie Luo, Tony Q. S. Quek

In comparison with both baseline and state-of-the-art schemes, our adaptive approach strikes the best accuracy-delay tradeoff on the univariate dataset, and achieves the best accuracy and F1-score on the multivariate dataset with only negligibly longer delay than the best (but inflexible) scheme.

Anomaly Detection Edge-computing +1

Learning Autonomy in Management of Wireless Random Networks

no code implementations15 Jun 2021 Hoon Lee, Sang Hyun Lee, Tony Q. S. Quek

The DMPNN is investigated for various configurations of the power control in wireless networks, and intensive numerical results prove its universality and viability over conventional optimization and DNN approaches.

Distributed Optimization Management

Feeling of Presence Maximization: mmWave-Enabled Virtual Reality Meets Deep Reinforcement Learning

no code implementations3 Jun 2021 Peng Yang, Tony Q. S. Quek, Jingxuan Chen, Chaoqun You, Xianbin Cao

This paper investigates the problem of providing ultra-reliable and energy-efficient virtual reality (VR) experiences for wireless mobile users.

reinforcement-learning Reinforcement Learning (RL)

Training Classifiers that are Universally Robust to All Label Noise Levels

1 code implementation27 May 2021 Jingyi Xu, Tony Q. S. Quek, Kai Fong Ernest Chong

In particular, we shall assume that a small subset of any given noisy dataset is known to have correct labels, which we treat as "positive", while the remaining noisy subset is treated as "unlabeled".

Ranked #7 on Image Classification on Clothing1M (using clean data) (using extra training data)

Image Classification

Two-Stage Stochastic Optimization via Primal-Dual Decomposition and Deep Unrolling

no code implementations5 May 2021 An Liu, Rui Yang, Tony Q. S. Quek, Min-Jian Zhao

Then we propose a PDD-based stochastic successive convex approximation (PDD-SSCA) algorithmic framework to find KKT solutions for two-stage stochastic optimization problems.

Rolling Shutter Correction Stochastic Optimization +1

Non-Terrestrial Networks for UAVs: Base Station Service Provisioning Schemes with Antenna Tilt

no code implementations14 Apr 2021 Seongjun Kim, Minsu Kim, Jong Yeol Ryu, Jemin Lee, Tony Q. S. Quek

By considering the antenna tilt angle-based channel gain, we derive the network outage probability for both IS-BS and ES-BS schemes, and show the existence of the optimal tilt angle that minimizes the network outage probability after analyzing the conflict impact of the antenna tilt angle.

Optimizing the Long-Term Average Reward for Continuing MDPs: A Technical Report

no code implementations13 Apr 2021 Chao Xu, Yiping Xie, Xijun Wang, Howard H. Yang, Dusit Niyato, Tony Q. S. Quek

cost), by integrating R-learning, a tabular reinforcement learning (RL) algorithm tailored for maximizing the long-term average reward, and traditional DRL algorithms, initially developed to optimize the discounted long-term cumulative reward rather than the average one.

reinforcement-learning Reinforcement Learning (RL)

Joint Network Topology Inference via Structured Fusion Regularization

no code implementations5 Mar 2021 Yanli Yuan, De Wen Soh, Xiao Yang, Kun Guo, Tony Q. S. Quek

Theoretically, we provide a theoretical analysis of the proposed graph estimator, which establishes a non-asymptotic bound of the estimation error under the high-dimensional setting and reflects the effect of several key factors on the convergence rate of our algorithm.

Computational Efficiency

Fresh, Fair and Energy-Efficient Content Provision in a Private and Cache-Enabled UAV Network

no code implementations25 Feb 2021 Peng Yang, Kun Guo, Xing Xi, Tony Q. S. Quek, Xianbin Cao, Chenxi Liu

Particularly, we first propose to decompose the sequential decision problem into multiple repeated optimization subproblems via a Lyapunov technique.

Networking and Internet Architecture Signal Processing

Power Control for a URLLC-enabled UAV system incorporated with DNN-Based Channel Estimation

no code implementations14 Nov 2020 Peng Yang, Xing Xi, Tony Q. S. Quek, Xianbin Cao, Jingxuan Chen

This problem is challenging to be solved due to the requirement of analytically tractable channel models and the non-convex characteristic as well.

Multi-Armed Bandit Based Client Scheduling for Federated Learning

1 code implementation5 Jul 2020 Wenchao Xia, Tony Q. S. Quek, Kun Guo, Wanli Wen, Howard H. Yang, Hongbo Zhu

In each communication round of FL, the clients update local models based on their own data and upload their local updates via wireless channels.

Federated Learning Scheduling

Adaptive Anomaly Detection for IoT Data in Hierarchical Edge Computing

no code implementations10 Jan 2020 Mao V. Ngo, Hakima Chaouchi, Tie Luo, Tony Q. S. Quek

We evaluate our proposed approach using a real IoT dataset, and demonstrate that it reduces detection delay by 84% while maintaining almost the same accuracy as compared to offloading detection tasks to the cloud.

Anomaly Detection Edge-computing

Federated Learning with Differential Privacy: Algorithms and Performance Analysis

no code implementations1 Nov 2019 Kang Wei, Jun Li, Ming Ding, Chuan Ma, Howard H. Yang, Farokhi Farhad, Shi Jin, Tony Q. S. Quek, H. Vincent Poor

Specifically, the theoretical bound reveals the following three key properties: 1) There is a tradeoff between the convergence performance and privacy protection levels, i. e., a better convergence performance leads to a lower protection level; 2) Given a fixed privacy protection level, increasing the number $N$ of overall clients participating in FL can improve the convergence performance; 3) There is an optimal number of maximum aggregation times (communication rounds) in terms of convergence performance for a given protection level.

Federated Learning Privacy Preserving +1

Age-Based Scheduling Policy for Federated Learning in Mobile Edge Networks

no code implementations31 Oct 2019 Howard H. Yang, Ahmed Arafa, Tony Q. S. Quek, H. Vincent Poor

Federated learning (FL) is a machine learning model that preserves data privacy in the training process.

Information Theory Signal Processing Information Theory

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

no code implementations26 Oct 2019 Hoon Lee, Tony Q. S. Quek, Sang Hyun Lee

For universal support of arbitrary dimming target, the DL-based VLC transceiver is trained with multiple dimming constraints, which turns out to be a constrained training optimization that is very challenging to handle with existing DL methods.

Binarization

On Safeguarding Privacy and Security in the Framework of Federated Learning

no code implementations14 Sep 2019 Chuan Ma, Jun Li, Ming Ding, Howard Hao Yang, Feng Shu, Tony Q. S. Quek, H. Vincent Poor

Motivated by the advancing computational capacity of wireless end-user equipment (UE), as well as the increasing concerns about sharing private data, a new machine learning (ML) paradigm has emerged, namely federated learning (FL).

Networking and Internet Architecture

Scheduling Policies for Federated Learning in Wireless Networks

no code implementations17 Aug 2019 Howard H. Yang, Zuozhu Liu, Tony Q. S. Quek, H. Vincent Poor

Due to limited bandwidth, only a portion of UEs can be scheduled for updates at each iteration.

Information Theory Signal Processing Information Theory

Deep Learning for Distributed Optimization: Applications to Wireless Resource Management

no code implementations31 May 2019 Hoon Lee, Sang Hyun Lee, Tony Q. S. Quek

This paper studies a deep learning (DL) framework to solve distributed non-convex constrained optimizations in wireless networks where multiple computing nodes, interconnected via backhaul links, desire to determine an efficient assignment of their states based on local observations.

Binarization Distributed Optimization +2

Deep Learning Framework for Wireless Systems: Applications to Optical Wireless Communications

no code implementations13 Dec 2018 Hoon Lee, Sang Hyun Lee, Tony Q. S. Quek, Inkyu Lee

Optical wireless communication (OWC) is a promising technology for future wireless communications owing to its potentials for cost-effective network deployment and high data rate.

Three Dimensional Convolutional Neural Network Pruning with Regularization-Based Method

no code implementations NIPS Workshop CDNNRIA 2018 Yuxin Zhang, Huan Wang, Yang Luo, Lu Yu, Haoji Hu, Hangguan Shan, Tony Q. S. Quek

Despite enjoying extensive applications in video analysis, three-dimensional convolutional neural networks (3D CNNs)are restricted by their massive computation and storage consumption.

Model Compression Network Pruning

Variational Probability Flow for Biologically Plausible Training of Deep Neural Networks

no code implementations21 Nov 2017 Zuozhu Liu, Tony Q. S. Quek, Shaowei Lin

The quest for biologically plausible deep learning is driven, not just by the desire to explain experimentally-observed properties of biological neural networks, but also by the hope of discovering more efficient methods for training artificial networks.

Biologically-plausible Training

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