
Chamitha De AlwisUniversity of Bedfordshire
Chamitha De Alwis
PhD
About
85
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Introduction
Chamitha De Alwis (Senior Member, IEEE) is a Lecturer in Cybersecurity in the School of Computer Science and Technology, University of Bedfordshire, United Kingdom. He received the B.Sc. (First Class Hons.) in Electronic and Telecommunication Engineering from University of Moratuwa, Sri Lanka, in 2009, and the Ph.D. in Electronic Engineering from University of Surrey, United Kingdom, in 2014.
Skills and Expertise
Publications
Publications (85)
Forward-thinking reference on spectrum sharing and resource management for 5G, B5G, and 6G wireless networks
Intelligent Spectrum Management: Towards 6G explores various aspects of spectrum sharing and resource management in 5G, beyond 5G, and the envisaged 6G networks. The book offers an in-depth exploration of intelligent and secure sharing of s...
Energy blockchain applications are becoming inevitable with the transformation of electricity distribution networks into the decentralized Smart Grid 2.0 architecture. The scalability of the blockchain platform plays a key role in catering to the increasing number of nodes connected due to consumer-turned-prosumers being integrated into the distrib...
Blockchain has become the technology enabler in delivering modern Smart Grid 2.0 functionalities. Many services including Peer-to-Peer energy trading, distribution network management, financial settlements, and energy data management are catered through blockchain-enabled platforms. However, areas such as service quality-based pricing strategies, s...
Today, elastic optical networks (EONs) are required to accommodate traffic with different service priorities. For example, mission‐critical applications such as industrial internet, smart grids, and remote surgery require an ultra‐reliable low‐latency communication system. The novel impairment‐aware resource allocation scheme proposed here prioriti...
The futuristic energy grids comprise of predominantly renewable generation, to align with the sustainable development goals. This would require integration of renewable energy sources at different levels of the power system out of which, consumers turning into power producers, often referred to as prosumers is an important aspect. Prosumers who gen...
The futuristic energy grids comprise of predominantly renewable generation, to align with the sustainable development goals. This would require integration of renewable energy sources at different levels of the power system out of which, consumers turning into power producers, often referred to as prosumers is an important aspect. Prosumers who gen...
The dawn of softwarized networks enables Network Slicing (NS) as an important technology towards allocating end-to-end logical networks to facilitate diverse requirements of emerging applications in fifth-generation (5G) mobile networks. However, the emergence of NS also exposes novel security and privacy challenges, primarily related to aspects su...
Researchers and standardization bodies have been paying increasing attention to the network management automation issue in 5G systems. Autonomous solutions for managing network resources are required in the present era of flexible and dynamic cloud-based settings. Operators strive for efficiency by optimizing network resources. The next step in net...
Accurate fetal Ultrasound (US) image segmentation facilitates advanced obstetric health care by enabling remote monitoring of expectant mothers. However, fetal US image segmentation is challenging due to distortions, motion artifacts, various imaging conditions and presence of maternal anatomy. Recent research work has proposed many methods towards...
The concept of the Metaverse aims to bring a fully-fledged extended reality environment to provide next generation applications and services. Development of the Metaverse is backed by many technologies, including, 5G, artificial intelligence, edge computing and extended reality. The advent of 6G is envisaged to mark a significant milestone in the d...
With the advent of 5G technology and rise of autonomous vehicles (AVs), road safety is going to get more secure with less human errors. However, integration of 5G in AVs is still at its infant stage with several research challenges that needs to be addressed. Therefore, this survey discusses the current advancements of integrating 5G technology in...
This paper proposes a network quality-based navigation routing algorithm to facilitate users to enjoy seamless access to mobile services in 5G and beyond networks. The proposed algorithm is capable of finding K multiple optimum paths satisfying multiple Quality of Service (QoS) metrics required for a particular mobile application. Relevant QoS para...
While 5G is at the early deployment state around the globe, the research and industrial communities have already started concentrating their efforts on formulating the overall 6G vision comprising requirements, key enabling technologies, performance indicators, and applications. Following the trend, it is evident that 6G will emerge as highly softw...
Sixth-generation mobile networks (6G) are expected to reach extreme communication capabilities to realize emerging applications demanded by the future society. This paper focuses on six technological directions towards 6G, namely, intent-based networking, THz communication, artificial intelligence, distributed ledger technology/blockchain, smart de...
The ever-growing smart applications will expand the Internet of Things (IoT) ecosystem to connect over 75 billion devices by 2025. IoT ecosystems comprise sensors that act as data suppliers and applications where monetary transactions are required to compensate the data producers. This signifies the importance of IoT payments and marketplaces to fa...
The network management automation problem in 5G systems has been gaining attention from standardization organizations and researchers. The current age of agile and dynamic cloud-based environments demands autonomous systems for managing network resources. Operators aim to optimize the network resources to achieve minimalism with efficiency. Autonom...
This chapter discusses the key sixth‐generation driving trends elaborating why and how each trend demands a new generation of communication networks. Internet of Things (IoT) envisions to weave a global network of machines and devices that are capable of interacting with each other. The term “Small Data” refers to small data sets representing a lim...
This conclusion presents some closing thoughts on the concepts covered in the preceding chapters of this book. The book provides a visionary insight in to the present and future developments of sixth‐generation (6G). It covers a multitude of 6G aspects, including, what will be the 6G requirements, and how to build different architectures to play to...
Sixth‐generation (6G) is envisaged to play a key role in emerging healthcare applications. This chapter discusses the evolution of telehealth toward intelligent healthcare applications. It details emerging trends of intelligent healthcare applications. The chapter also focuses on security and privacy aspects of future healthcare applications. The e...
Harmonized mobile networks refer to the smooth interconnection of multiple communication technologies, data storage, and processing platforms at different scales. Extreme global network coverage refers to the digital inclusion through seamless global service coverage by connecting remote, rural, deep‐sea, and even space locations. This chapter focu...
Sixth‐generation (6G) is envisaged to rely on the advancements of Artificial Intelligence and data analytics to provide personalized and fully automated seamless communication services. However, this may lead to several security and privacy issues and concerns. This chapter discusses the security threat landscape of future 6G networks. In the fifth...
In a smart city, the administration/government uses Information and Communications Technology (ICTs) for efficient administration and governance to provide quality and better services to the urban citizens. Recent advances and innovations in technologies and devices, such as smart phones, cloud computing, edge computing, AI and allied technologies,...
Industrial automation together with the advent of Industry 5.0 is envisaged to be one of the key emerging sixth‐generation (6G) applications in the coming decade. This chapter discusses the network‐level requirements to enable Industry 5.0, Collaborative Robots, and Digital Twin. It examines the relevance of 6G networks for realization of Industria...
Network softwarization emerged with the advent of fifth‐generation. These functionalities are expected to evolve toward intelligent network softwarization with the dawn of sixth‐generation networks. This chapter focuses on the technological development toward intelligent network softwarization. Softwarized network architecture integrates the princi...
This chapter provides an overview of key technologies in future sixth‐generation (6G) wireless systems. It presents important 6G radio network technologies, including terahertz (THz) communications and nonterrestrial networks toward 3D networking. THz band channel is highly frequency‐selective. These channels suffer from high atmospheric absorption...
Sixth‐generation (6G) introduces a new landscape for mobile communication. This requires new legal framework and standardization efforts. This chapter focuses on 6G legal aspects and standardization approaches. The evolving 6G landscape will also demand changes in legal and regulatory domains. For instance, 6G mobile networks will heavily depend on...
Sixth‐generation (6G) has a tremendous potential and vision that can push new industries, applications, and businesses through connecting earth‐to‐space, space‐to‐space, space‐to‐deep sea, and so on. This chapter explores three visionary applications of 6G, namely, metaverse, space communication, and deep‐sea tourism. The concept of metaverse refer...
Mobile networks have been evolving since the 1980s, resulting in a new generation of mobile network every decade. Presently, fifth‐generation (5G) mobile networks are being deployed. The sixth‐generation (6G) mobile communication networks are expected to mark a disruptive transformation to the mobile networking paradigm by reaching extreme network...
Sixth‐generation (6G) mobile network architecture is envisaged to undergo a remarkable evolution from fifth‐generation to facilitate the flexible infrastructure demanded by future technologies and applications. This chapter describes how 6G evolves to be an intelligent and energy efficient network. The network architecture proposed by Letaief et al...
Future sixth‐generation (6G) networks are expected to have fully automated (zero‐touch) network services and management. This chapter discusses the needs of automated network and service management for 6G. It details the zero‐touch network and service management (ZSM) architecture and its components. One of the main design objectives of the ZSM ref...
Sixth‐generation (6G) networks are envisaged to have greater energy efficiency and green computing capabilities compared to its predecessors. This chapter focuses on the energy‐efficient network management with 6G. It discusses the energy‐efficient security. The chapter also focuses on the energy‐efficient resource management. Exploiting machine‐le...
Edge AI, also known as edge intelligence, combines the capabilities of edge computing with Artificial Intelligence (AI) to facilitate sixth‐generation applications and services. This chapter details the benefits of edge AI and explores building blocks for edge AI. Edge AI is the processing of AI algorithms on edge, that is, on users' devices. It ha...
The sixth‐generation (6G) networks are required to develop over existing fifth‐generation (5G) networks to support emerging technologies and applications. Enhanced Mobile Broadband (eMBB) represents a continuing evolution from traditional Long‐Term Evolution, which enables mobile broadband in limited applications. In 5G, eMBB is being enhanced grea...
A Radio Access Network (RAN) is an important part of any wireless communication system that connects end users with the other components of a network through radio communication links. This chapter discusses the three key concepts of sixth‐generation (6G) RANs, including Aerial Radio Access Network (ARAN), AI‐enabled Radio Access Network, and Open...
The agricultural sector is a major economic force in Sri Lanka, which contributes to the national economy, food security, and employment. The traditional methods practiced by farmers mainly drove the growth of the agriculture sector over the last 2500 years. However, these traditional methods have often been ineffective against pest attacks in rece...
Fifth Generation (5G) technology is an emerging and fast adopting technology which is being utilized in most of the novel applications that require highly reliable low-latency communications. It has the capability to provide greater coverage, better access, and best suited for high density networks. Having all these benefits, it clearly implies tha...
Multi-access Edge Computing (MEC) is a novel edge computing paradigm that moves cloud-based processing and storage capabilities closer to the mobile users by implementing server resources in the access nodes. MEC helps fulfill the stringent requirements of 5G and beyond networks to offer anytime-anywhere connectivity for many devices with ultra-low...
Smart Grid 2.0 (SG 2.0) architecture is envisaged to revolutionize the next generation of electricity networks. Further, it is identified as a key role player in realizing Industry 4.0, which is striving towards cyber-physical systems. Blockchain integration in next-generation smart grids has proven to be beneficial in catering to the requirements...
The popularity of blockchain is on the rise as the technology is touted to become an enabler of many existing and futuristic applications. These applications range from cryptocurrency-based financial applications to secure supply chain management, privacy-protected medical data handling, secure yet transparent e-voting, decentralized Internet of Th...
The next generation of mobile networks, i.e., sixth-generation (6G), is expected by 2030, with already burgeoning research efforts towards this goal. Along with other various candidate technologies, blockchain is envisioned to enable and enhance various key functionalities of 6G networks. Accordingly, the main objective of this paper is threefold:...
The entire world progression has ceased with the unexpected outbreak of the COVID-19 pandemic, and urges the requirement for contact-less and autonomous services and applications. Realizing these predominantly Internet of Things (IoT) based applications demands a holistic pervasive computing infrastructure. In this paper, we conduct a survey to det...
Network slicing (NS) is a utilitarian technology that enables heterogeneous smart use cases in Fifth Generation (5G) and beyond networks. Smart hospitals require NS to realize its applications with diverse network requirements, which can not facilitate via traditional networks in hospital environments. NS can be performed under different strategies...
The dawn of smart industries will utilize myriads of interconnected machines, devices, and sensors in factory environments to perform intelligent operations. This paradigm demands satisfying diverse communication requirements through strong network connectivity and services. Network Slicing (NS) in the fifth-generation (5G) and beyond networks is a...
Smart grids are placed in a conspicuous position of future, decentralized electricity distribution systems, possessing automated capabilities and fault recovery through self-resilience. Such architecture enables maximization of consumer participation in electricity trading and optimized utilization of distributed generation, which mainly comprises...
Smart Grid 2.0 is envisaged to automate the operations of the intelligent electricity grid. Blockchain and smart contracts are integrated to facilitate the transformation from DSO-centric operations to consumer-oriented, distributed electricity grid management. The envisaged smart grids, integrated with blockchain would provoke challenges, which wo...
Emergence of the Energy Internet (EI) demands restructuring of traditional electricity grids to integrate heterogeneous energy sources, distribution network management with grid intelligence and big data management. This paradigm shift is considered to be a breakthrough in the energy industry towards facilitating autonomous and decentralized grid o...
The demand for various smart applications in the Internet of Things (IoT) domain is overgrowing. These applications require access to the sensor data generated from different IoT applications. This IoT ecosystem needs a way for sensors and devices to make monetary transactions in exchange for these data services. This has given rise to the concept...
Emerging applications such as Internet of Everything , Holographic Telepresence, collaborative robots, and space and deep-sea tourism are already highlighting the limitations of existing fifth-generation (5G) mobile networks. These limitations are in terms of data-rate, latency, reliability, availability, processing, connection density and global c...
Flexible-grid elastic optical networks (EONs) are widely considered as the future of next generation optical transport networks. Depleting spectral resources and increasing power consumption are two critical bottlenecks of EONs. In this paper, we propose a novel impairment-aware resource allocation scheme that jointly minimizes bandwidth waste and...
Agriculture sector is a major economic force in Sri Lanka, making a significant contribution to the national economy. However, it is observed that land and human resources available in Sri Lanka for agriculture becomes scarce. On the other hand, the demand for high quality agricultural products is on the rise. Therefore, we need to embrace cost eff...
The COVID-19 pandemic has affected the world in an unexpected manner. The human race is battling against the pandemic while schools, universities, industries, hospitals and governments are seeking new methods and technologies to seamlessly continue their usual operations. In response, this paper presents how 5G and IoT (Internet of Things) related...
This research paper proposes a novel physical layer-impairments-aware (PLI-aware) resource allocation scheme to increase the spectrum efficiency of an Elastic Optical Network (EON) serving internet traffic with different service priorities. The proposed scheme guarantees low latency and low blocking rate for high-priority connections while causing...
Imaging is one of the key medical diagnostic tools to observe internal organs and soft tissues. One such tool is ultrasound scanning, which is highly utilized in gynecology and echo cardiogram. This is due to the number of advantages of ultrasound scanning, such as being non-invasive, free of radiation, economical and real-time. However, access to...
This work investigates the feasibility of using High Efficiency Video Coding (HEVC) to stream ultra-sound scan video over mobile networks. HEVC is designed to efficiently encode and decode high volume video to achieve a significant bit-rate saving while preserving the video quality. Even though HEVC is capable of encoding and decoding movies, the e...
Along with the rapid growth in consumer adoption of modern portable devices, video streaming is expected to dominate a large share of the global internet traffic in the near future. In the wireless communications domain, this trend creates considerable challenges to consumers' quality of experience (QoE). From a consumer-focused vision, predicting...
Along with the rapid growth in consumer adoption of modern portable devices, video streaming is expected to dominate a large share of the global internet traffic in the near future. In the wireless communications domain, this trend creates considerable challenges to consumers' quality of experience (QoE). From a consumer-focused vision, predicting...
Technological advancements have realized inexpensive standalone portable devices to perform ultrasound scans, which enables underfunded rural medical establishments to be equipped with ultrasound scanning facilities. However, the scarcity of medical experts to observe ultrasound scans is a major limiting factor. It is possible to overcome this limi...
Along with the rapid growth in consumer adoption of modern portable devices, video streaming is expected to dominate a large share of the global internet traffic in the near future. In the wireless communications domain, this trend creates considerable challenges to consumers??? quality of experience (QoE). From a consumer-focused vision, predictin...
This paper proposes content and network-aware redundancy allocation algorithms for channel coding and network coding to optimally deliver data and video multicast services over error prone wireless mesh networks. Each network node allocates redundancies for channel coding and network coding taking in to account the content properties, channel bandw...
Demand on multimedia content by consumers' handheld devices over wireless channels is on the increase. In view of the accelerated trend towards consumption of high quality video, power utilization by mobile devices is expected to excessively increase. Hence, it becomes equally important to advance more efficient power minimization techniques, in li...
Demand on multimedia content by consumers' handheld devices over wireless channels is on the increase. In view of the accelerated trend towards consumption of high quality video, power utilization by mobile devices is expected to excessively increase. Hence, it becomes equally important to advance more efficient power minimization techniques, in li...
For OFDM channels, we propose a content-aware subcarrier allocation scheme for multiuser video transmission that maximizes user perceived quality while minimizing power consumption. The scheme utilizes utility function-based genetic algorithms to solve the multi-objective optimization problem. It significantly outperforms existing methods in terms...
We present a method to estimate the probability of decoding a network coded packet generation transmitted across an erasure network. Simulation results closely correlate to estimated results. The proposed method is used to multicast delay sensitive data at the a.) required delivery probability b.) optimal throughput.
We present a method to estimate the probability of decoding a network coded packet generation transmitted across an erasure network. Simulation results closely correlate to estimated results. The proposed method is used to multicast delay sensitive data at the a.) required delivery probability b.) optimal throughput.
Network Coding is a promising approach to increase network throughput and robustness to facilitate high volume traffic. Performing network coding in dynamic network structures requires transmitting coding coefficients for information sinks to decode network coded packets. Compared to the packet sizes used in practical networks, the size of coeffici...
Stereoscopic 3D video is an important technology for immersive and interactive multimedia. Quality of Experience (QoE) provision is a key objective of the emerging multimedia delivery systems. While subjective assessment of QoE remains the most reliable option, objective metrics are often sought after while engineering practical media distribution...
Stereoscopic 3D video is a key enabler of advanced immersive multimedia systems. Network coding on the other hand is a promising technology that would be implemented on the future internet that has the capability to increase the throughput of networks. This paper considers a methodology for 3D video transmission over network coding enabled networks...
Stereoscopic 3D video is an important technology for immersive and interactive multimedia. Quality of Experience (QoE) provision is a key objective of the emerging multimedia delivery systems. While subjective assessment of QoE remains the most reliable option, objective metrics are often sought after while engineering practical media distribution...
Stereoscopic 3D video is a key enabler of advanced immersive multimedia systems. Network coding on the other hand is a promising technology that would be implemented on the future internet that has the capability to increase the throughput of networks. This paper considers a methodology for 3D video transmission over network coding enabled networks...
Network Coding is a promising approach to increase network throughput and robustness to facilitate high volume traffic. Performing network coding in dynamic network structures requires transmitting coding coefficients for information sinks to decode network coded packets. Compared to the packet sizes used in practical networks, the size of coeffici...
With the increasing popularity of online video streaming and broadcasting applications, video transmission has become the most bandwidth consumed application in the Internet. Unless resource utilisation is further optimised, existing networks would not be able to accommodate the forecasted demand for high volume video traffic. Random Linear Network...
With the increasing popularity of online video streaming and broadcasting applications, video transmission has become the most bandwidth consumed application in the Internet. Unless resource utilisation is further optimised, existing networks would not be able to accommodate the forecasted demand for high volume video traffic. Random Linear Network...
Dengue epidemic is one the hard challenges that Sri Lankan citizen face today. With the fast growth and due to unavailability of medicines, situation has been worsened. The only way to thwart this danger is to extinct the main cause Aedes aegypti mosquito. Current activities to minimize the mosquito population, are done in an ad-hoc manner. This pa...
Dengue epidemic is one the hard challenges that Sri Lankan citizen face today. With the fast growth and due to unavailability of medicines, situation has been worsened. The only way to thwart this danger is to extinct the main cause Aedes aegypti mosquito. Current activities to minimize the mosquito population, are done in an ad-hoc manner. This pa...