A. Hamid Aghvami

A. Hamid Aghvami
King's College London | KCL · Department of Informatics

About

789
Publications
68,129
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10,943
Citations
Additional affiliations
September 2014 - January 2017
King's College London
Position
  • Professor (Full) in Tlecommuications Engieering

Publications

Publications (789)
Preprint
Mobile communication standards were developed for enhancing transmission and network performance by utilizing more radio resources and improving spectrum and energy efficiency. How to effectively address diverse user requirements and guarantee everyone's Quality of Experience (QoE) remains an open problem. The future Sixth Generation (6G) system ca...
Article
Full-text available
This manuscript was accepted by IEEE Transactions on Wireless Communications on 19th March 2022, of which the preprint version was available in ResearchGate months ago to the acceptance. The link of this preprint version is https://www.researchgate.net/publication/354235269_Path_Planning_for_Cellular-Connected_UAV_A_DRL_Solution_with_Quantum-Inspir...
Conference Paper
Full-text available
In the presence of Warden's detection, a maximization problem on transmission throughput from unmanned aerial vehicle (UAV) to legitimate nodes is considered and solved via UAV trajectory design, subject to covert, velocity and mobility constraints. With the building-distribution-based pathloss model and the Warden's uncertain location model, the f...
Conference Paper
Full-text available
Note that this publication is the conference version of our preprinted journal paper "Path Planning for Cellular-Connected UAV: A DRL Solution with Quantum-Inspired Experience Replay". The following is the original abstract of this conference paper. In cellular-connected unmanned aerial vehicle (UAV) network, a minimization problem on the weighted...
Article
How to prolong network lifetime has become an important issue in the design of large scale wireless sensor networks (WSNs). In this paper, a novel power saving scheme for conventional WSNs via simultaneous wireless information and power transfer (SWIPT) based relays is proposed. Unlike conventional relays based communications need extra energy supp...
Article
With the stringent requirement of receiving video from the unmanned aerial vehicle (UAV) from anywhere in the stadium of sports events and the significant-high per-cell throughput for video transmission to virtual reality (VR) users, a promising solution is a cell-free multi-group broadcast (CF-MB) network with cooperative reception and broadcast a...
Preprint
Full-text available
Integrating unmanned aerial vehicles (UAVs) into the existing cellular networks faces lots of challenges, in which one of the most striking concerns is how to adopt UAVs into cellular networks with less adverse effects on ground user equipments (UEs). In this paper, a cellular-connected UAV network is considered, where multiple UAVs receive message...
Preprint
Full-text available
In cellular-connected unmanned aerial vehicle (UAV) network, a minimization problem on the weighted sum of time cost and expected outage duration is considered. Taking advantage of UAV's adjustable mobility, an intelligent UAV navigation approach is formulated to achieve the aforementioned optimization goal. Specifically, after mapping the navigati...
Preprint
Scalability is the key roadstone towards the application of cooperative intelligent algorithms in large-scale networks. Reinforcement learning (RL) is known as model-free and high efficient intelligent algorithm for communication problems and proved useful in the communication network. However, when coming to large-scale networks with limited centr...
Article
In this paper, we consider a wireless uplink transmission scenario in which an unmanned aerial vehicle (UAV) serves as an aerial base station collecting data from ground users. To optimize the expected sum uplink transmit rate without any prior knowledge of ground users (e.g., locations, channel state information and transmit power), the trajectory...
Article
Smartphone-based indoor localization has attracted considerable attentions in both research and industrial areas. However, the localization accuracy and robustness are still challenging problems due to low-cost noisy devices, especially in those complicated localization environments. Considering that pedestrian dead-reckoning (PDR) devices are wide...
Article
This article investigates the ultra-reliable communication for industrial wireless sensor networks (IWSNs), where frequency diversity, path diversity and cooperative diversity are jointly investigated. We propose a novel IWSN equipped with the full-duplex (FD) relays and carrier aggregation (CA) technique, to improve the reliability of all sensors....
Article
Extended reality (XR)-aided teleoperation has shown its potential in improving operating efficiency in mission-critical, information-rich, and complex scenarios. The multi-sensory XR devices introduce several new types of traffic with unique quality of service (QoS) requirements, which are usually defined by three measures: human perception, corres...
Chapter
The dawn of the 5G commercialization era brings the proliferation of advanced capabilities within the triptych of radio access network, end user devices, and edge cloud computing which hopefully propel the introduction of novel, complex multimodal services such as those that enlarge the physical world around us like mobile augmented reality. Managi...
Preprint
Full-text available
Extended Reality (XR)-aided teleoperation has shown its potential in improving operating efficiency in mission-critical, rich-information and complex scenarios. The multi-sensory XR devices introduce several new types of traffic with unique quality-of-service (QoS) requirements, which are usually defined by three measures---human perception, corres...
Preprint
Full-text available
With the stringent requirement of receiving video from unmanned aerial vehicle (UAV) from anywhere in the stadium of sports events and the significant-high per-cell throughput for video transmission to virtual reality (VR) users, a promising solution is a cell-free multi-group broadcast (CF-MB) network with cooperative reception and broadcast acces...
Conference Paper
Full-text available
This paper presents a multipath routing solution combined with Quality-of-Service (QoS) in Software Defined Network (SDN) for providing a low-delay traffic solution for Tactile Internet network domain. After SDN controller has calculated the k-best end-to-end routing paths based on the available bandwidth and number of the hops in the path, the flo...
Article
Full-text available
To enhance transmission performance, privacy level, and energy manipulating efficiency of wireless networks, this paper initiates a novel simultaneous wireless information and power transfer (SWIPT) full-duplex (FD) relaying protocol, named harvest-andopportunistically- relay (HOR). Due to the FD characteristics, the dynamic fluctuation of relay’s...
Conference Paper
In this work, we develop a novel channel estimation method using recurrent neural networks (RNNs) for massive multiple-input multiple-output (MIMO) systems. The proposed framework alleviates the need for channel-state-information (CSI) feedback and pilot assignment through exploiting the inherent time and frequency correlations in practical propaga...
Preprint
Full-text available
In this paper, we consider a wireless uplink transmission scenario in which an unmanned aerial vehicle (UAV) serves as an aerial base station collecting data from ground users. To optimise the expected sum uplink transmit rate without any prior knowledge of ground users (e.g., locations, channel state information and transmit power), the trajectory...
Article
Full-text available
Cellular-connected wireless connectivity provides new opportunities for virtual reality (VR) to offer seamless user experience from anywhere at anytime. To realize this vision, the quality-of-service (QoS) for wireless VR needs to be carefully defined to reflect human perception requirements. In this article, we first identify the primary drivers o...
Preprint
For enhancing transmission performance, privacy level and energy manipulating efficiency of wireless networks, this paper initiates a novel simultaneous wireless information and power transfer (SWIPT) full-duplex (FD) relaying protocol, termed harvest-and-opportunistically-relay (HOR). In the proposed HOR protocol, the relay can work opportunistica...
Preprint
Full-text available
Cellular-connected wireless connectivity provides new opportunities for virtual reality(VR) to offer seamless user experience from anywhere at anytime. To realize this vision, the quality-of-service (QoS) for wireless VR needs to be carefully defined to reflect human perception requirements. In this paper, we first identify the primary drivers of V...
Conference Paper
In this work, a deep learning-based symbol detection method is developed for multi-user multiple-input multiple-output (MIMO) systems. We demonstrate that the linear threshold-based detection methods, which were designed for AWGN channels, are suboptimal in the context of MIMO fading channels. Furthermore, we propose a MIMO detection framework whic...
Article
Full-text available
A novel joint optimization framework for device to device (D2D) enabled non-orthogonal multiple access (NOMA) networks is proposed. Our objective is to maximize the performance of D2D communication by jointly optimizing the resource block (RB) assignment, the power allocation, by considering the SIC decoding order of NOMA based cellular user equipm...
Conference Paper
Full-text available
This paper presents a foundation study of the routing support in scoped IP access networks towards early investigations and conclusions on provisioning the tactile traffic class in related networks. A specification for a type of traffic for tactile/haptic communications is derived and applied in the paper and tested in network scenarios alongside w...
Article
Full-text available
The exploding volumes of mobile video traffic call for deploying content caches inside mobile operator networks. Within-network caching, users’ requests for popular content can be served from a content cache deployed at mobile gateways in vicinity to the end user. This inherently reduces the load on the content servers and the backbone of operator’...
Article
Full-text available
The development of compressive sensing (CS) technology has inspired data gathering in wireless sensor networks to move from traditional raw data gathering towards compression based gathering using data correlations. While extensive efforts have been made to improve the data gathering efficiency, little has been done for data that is gathered and re...
Article
We present a review of spectrum sharing wireless body area networks. We investigate how cognitive radio and dynamic spectrum access are used for body area networks to save spectral resources. Specifically, we study the features associated with the usage of the three major cognitive radio paradigms of underlay, interweave, and overlay in these netwo...
Conference Paper
This paper studies the physical (PHY)-layer security performance in full-duplex (FD) multiple- input multiple-output (MIMO) small-cell networks. Here, we take into account (i) residual self- interference (SI) over Rician fading channels, and (ii) mutual-interference (MI) under successive interference cancellation (SIC) mechanism. Considering linear...
Conference Paper
Full-text available
The expected variable nature of future access network structures calls for network providers to adapt accordingly in order to facilitate loss free networks supported with the developing IP infrastructure. To this end, a routing optimization mechanism applicable to randomly shaped all-IP access networks must be developed. In this paper, Multi-Plane...
Article
We provide a theoretical study of physical (PHY)- layer security performance in full-duplex (FD) small-cell networks. Here, the multi-antenna base stations (BSs) and user equipments (UEs) follow from the homogeneous Poisson point process (PPP)-based abstraction model. To facilitate FD communications, we take into account (i) successive interference...
Article
Full-text available
The development of wireless power transfer (WPT) technology has inspired the transition from traditional battery-based wireless sensor networks (WSNs) towards wireless rechargeable sensor networks (WRSNs). While extensive efforts have been made to improve charging efficiency, little has been done for routing optimization. In this work, we present a...
Article
Mobile cyber-physical systems (M-CPSs) are envisaged as an integral part of our digital future. Dependability of M-CPSs is subject to timely, reliable, and secure information exchange among M-CPS entities. Information exchange provisioning in such systems is conventionally built with sole reliance on wireless connectivity. The conventional approach...
Conference Paper
In this work, we investigate the physical layer security (PHYLS) performance of full-duplex (FD) cellular networks, where the downlink (DL) and uplink (UL) occur over the same radio-frequency (RF) resources. Here, the locations of the base stations (BSs) and mobile terminals (MTs) are drawn from stationary Poisson point processes (PPPs). Moreover,...
Article
Full-text available
The exponential growth in data traffic and dramatic capacity demand in fifth generation (5G) have inspired the move from traditional single-tier cellular networks towards heterogeneous cellular networks (HCNs). To face the coming trend in 5G, the high availability requirement in new applications, needs to be satisfied to achieve low latency service...
Article
Full-text available
For many, this is no longer a valid question and the case is considered settled with SDN/NFV (Software Defined Networking/Network Function Virtualization) providing the inevitable innovation enablers solving many outstanding management issues regarding 5G. However, given the monumental task of softwarization of radio access network (RAN) while 5G i...
Article
Full-text available
With the expected surge in the global IP traffic,service providers would need to adapt accordingly to operatedisruption and loss free networks supported with the developing IP infrastructure. With the disposal of the hierarchical networkstructure, radio access networks are moving towards a flat-IParchitecture and novel topological set-ups in the ba...
Conference Paper
Full-text available
Over the past few years, many scientists have envisioned an Internet generation that will not only provide voice and data communications but can also support Haptic communications. This new Internet dimension can be beneficial for the society by facilitating the development of new technologies and applications that will improve our standards of liv...
Article
Full-text available
Traditional cellular networks are moving towards heterogeneous cellular networks (HetNets) to satisfy the stringent demand for data rates and capacity. To enable the new applications in 5G, such as haptic communications, we face new challenges of achieving high availability with low latency in HetNets. In this paper, we introduce coordinated multi-...
Article
Full-text available
The fifth-generation (5G) networks are expected to be able to satisfy users' different quality-of-service (QoS) requirements. Network slicing is a promising technology for 5G networks to provide services tailored for users' specific QoS demands. Driven by the increased massive wireless data traffic from different application scenarios, efficient re...
Article
As a tool of overcoming radio spectrum shortages in wireless communications, cognitive radio technology plays a vital role in future smart grid applications, particularly in Advanced Metering Infrastructure (AMI) networks with Quality of Service (QoS) requirements. This paper focuses on the investigation of the receiver-based routing protocol for e...
Article
Full-text available
Advanced metering infrastructure (AMI) networks, which are an integral component of the smart grid ecosystem, are practically deployed as a static multihop wireless mesh network. Recently, routing solutions for AMI networks have attracted a lot of attention in the literature. On the other hand, it is expected that the use of cognitive radio (CR) te...
Article
Due to increased energy consumption and carbon emissions of the ICT industry, operators worldwide are focusing on reducing energy consumption of their networks from the financial as well as corporate responsibility perspectives. The subject of green or energy-efficient operation of the cellular access network has attracted a lot of attention in the...
Conference Paper
Full-text available
With the expected surge in the global IP traffic, service providers would need to adapt accordingly to operate disruption and loss free networks supported with the developing IP infrastructure. With the disposal of the hierarchical network structure, radio access networks are moving towards a flat-IP architecture and novel topological set-ups in th...
Conference Paper
Full-text available
The exploding volumes of mobile video traffic call for deploying content caches inside mobile operators network. With in-network caching, users’ requests for popular content can be served from a content cache deployed at mobile gateways in vicinity to the end user, therefore considerably reducing the load on the content servers and the backbone of...
Conference Paper
Full-text available
There has been a rapid rise in the IP traffic throughout the Internet which takes advantage of the already established widespread IP infrastructure. Different suggestions are being explored to facilitate the next-generation access networks via IP mechanisms, with a growing trend towards a flat-IP structure and novel topological set-ups in the backh...
Article
Full-text available
In this letter we propose a QoE-aware video adaptation and resource allocation approach for power-efficient streaming over downlink OFDMA systems. Our adaptation scheme selectively drops packets from a video stream to produce a lower bit-rate version under QoE and delay constraints. This results in a reduction of the load and an increase of the vide...
Article
Full-text available
This paper presents a study of a method termed, multi-plane routing, that maximizes path diversity in IP routing and is targeted for IP access networks (AN). The motivation for the work is in the specific shortcomings of the conventional intra-domain IP routing principles such as “shortest-path” and “best-effort” when applied in IP ANs. We generali...