6,580 research outputs found

    Securing NextG networks with physical-layer key generation: A survey

    Get PDF
    As the development of next-generation (NextG) communication networks continues, tremendous devices are accessing the network and the amount of information is exploding. However, with the increase of sensitive data that requires confidentiality to be transmitted and stored in the network, wireless network security risks are further amplified. Physical-layer key generation (PKG) has received extensive attention in security research due to its solid information-theoretic security proof, ease of implementation, and low cost. Nevertheless, the applications of PKG in the NextG networks are still in the preliminary exploration stage. Therefore, we survey existing research and discuss (1) the performance advantages of PKG compared to cryptography schemes, (2) the principles and processes of PKG, as well as research progresses in previous network environments, and (3) new application scenarios and development potential for PKG in NextG communication networks, particularly analyzing the effect and prospects of PKG in massive multiple-input multiple-output (MIMO), reconfigurable intelligent surfaces (RISs), artificial intelligence (AI) enabled networks, integrated space-air-ground network, and quantum communication. Moreover, we summarize open issues and provide new insights into the development trends of PKG in NextG networks

    Information actors beyond modernity and coloniality in times of climate change:A comparative design ethnography on the making of monitors for sustainable futures in Curaçao and Amsterdam, between 2019-2022

    Get PDF
    In his dissertation, Mr. Goilo developed a cutting-edge theoretical framework for an Anthropology of Information. This study compares information in the context of modernity in Amsterdam and coloniality in Curaçao through the making process of monitors and develops five ways to understand how information can act towards sustainable futures. The research also discusses how the two contexts, that is modernity and coloniality, have been in informational symbiosis for centuries which is producing negative informational side effects within the age of the Anthropocene. By exploring the modernity-coloniality symbiosis of information, the author explains how scholars, policymakers, and data-analysts can act through historical and structural roots of contemporary global inequities related to the production and distribution of information. Ultimately, the five theses propose conditions towards the collective production of knowledge towards a more sustainable planet

    Analysis and Design of Non-Orthogonal Multiple Access (NOMA) Techniques for Next Generation Wireless Communication Systems

    Get PDF
    The current surge in wireless connectivity, anticipated to amplify significantly in future wireless technologies, brings a new wave of users. Given the impracticality of an endlessly expanding bandwidth, there’s a pressing need for communication techniques that efficiently serve this burgeoning user base with limited resources. Multiple Access (MA) techniques, notably Orthogonal Multiple Access (OMA), have long addressed bandwidth constraints. However, with escalating user numbers, OMA’s orthogonality becomes limiting for emerging wireless technologies. Non-Orthogonal Multiple Access (NOMA), employing superposition coding, serves more users within the same bandwidth as OMA by allocating different power levels to users whose signals can then be detected using the gap between them, thus offering superior spectral efficiency and massive connectivity. This thesis examines the integration of NOMA techniques with cooperative relaying, EXtrinsic Information Transfer (EXIT) chart analysis, and deep learning for enhancing 6G and beyond communication systems. The adopted methodology aims to optimize the systems’ performance, spanning from bit-error rate (BER) versus signal to noise ratio (SNR) to overall system efficiency and data rates. The primary focus of this thesis is the investigation of the integration of NOMA with cooperative relaying, EXIT chart analysis, and deep learning techniques. In the cooperative relaying context, NOMA notably improved diversity gains, thereby proving the superiority of combining NOMA with cooperative relaying over just NOMA. With EXIT chart analysis, NOMA achieved low BER at mid-range SNR as well as achieved optimal user fairness in the power allocation stage. Additionally, employing a trained neural network enhanced signal detection for NOMA in the deep learning scenario, thereby producing a simpler signal detection for NOMA which addresses NOMAs’ complex receiver problem

    Communicating a Pandemic

    Get PDF
    This edited volume compares experiences of how the Covid-19 pandemic was communicated in the Nordic countries – Denmark, Finland, Iceland, Norway, and Sweden. The Nordic countries are often discussed in terms of similarities concerning an extensive welfare system, economic policies, media systems, and high levels of trust in societal actors. However, in the wake of a global pandemic, the countries’ coping strategies varied, creating certain question marks on the existence of a “Nordic model”. The chapters give a broad overview of crisis communication in the Nordic countries during the first year of the Covid-19 pandemic by combining organisational and societal theoretical perspectives and encompassing crisis response from governments, public health authorities, lobbyists, corporations, news media, and citizens. The results show several similarities, such as political and governmental responses highlighting solidarity and the need for exceptional measures, as expressed in press conferences, social media posts, information campaigns, and speeches. The media coverage relied on experts and was mainly informative, with few critical investigations during the initial phases. Moreover, surveys and interviews show the importance of news media for citizens’ coping strategies, but also that citizens mostly trusted both politicians and health authorities during the crisis. This book is of interest to all who are looking to understand societal crisis management on a comprehensive level. The volume contains chapters from leading experts from all the Nordic countries and is edited by a team with complementary expertise on crisis communication, political communication, and journalism, consisting of Bengt Johansson, Øyvind Ihlen, Jenny Lindholm, and Mark Blach-Ørsten. Publishe

    LIPIcs, Volume 251, ITCS 2023, Complete Volume

    Get PDF
    LIPIcs, Volume 251, ITCS 2023, Complete Volum

    “It’s not a vacation, it’s your life”. Privileged identities, ageing experiences, and migration projects of British retirees on the coasts of Spain

    Full text link
    [eng] This doctoral thesis investigates identity, ageing, and migration through an intersectional approach to retirement and later life migration from the UK to Spain. Through an in-depth exploration of the experiences of British expatriate retirees in Costa del Sol, Andalusia, and Costa Brava, Catalonia, Spain, the thesis analyzes the generation of experiences between privilege, vulnerability, and precarity, and its contingent effects on the construction of these identity processes. The trend of British retirees moving to Spain has a long-standing history and has been studied in Anthropology, Gerontology, migration studies, and more. Yet, in the period between 2019 and 2020, when this research took place, the confluence of Brexit and the COVID-19 pandemic reinvigorated the field of study. Said geopolitical and sociosanitary shifts put the experiences and identities of British expatriate retirees in question; altering the material foundations upon which their privileged migration life projects were constructed. Like this, creating a unique context where privilege and uncertainty meet in the crux of intersecting experiences of migration and ageing. Through the latter, the thesis contributes to anthropological debates on the contextualized construction of identities between the self and society; on Global North ageing discourses and its’ effects on later life identity projects; and questions the use of migration categories on the ground. Since identity, ageing and migration are polysemic concepts that have mutated over time with their subsequent analytical repercussions, this thesis adopts an intersectional lens that recognizes and develops the debates these terms are involved in, as well as captures the everyday connections between micro experiences and macro structures that evidence relationships of power and the perpetuation of inequalities. This involves the study of labels and their adjacent prejudices and stigmas, exposing how these travel from one sociocultural context to another, while also exploring how feelings of belonging are built abroad. By examining through the seemingly privileged retirement migration experiences of informants, this doctoral thesis exposes the intricacies between privilege, vulnerability, dependence, and precarity through the minutiae of the quotidian, contributing to wider empirical and conceptual debates regarding identity, ageing, and migration.[spa] Esta tesis doctoral investiga la identidad, el envejecimiento y la migración a través de un enfoque interseccional de la gerontomigración y la migración en etapas vitales tardías des del Reino Unido a España. Al explorar en profundidad las experiencias de jubilados expatriados británicos en la Costa del Sol y la Costa Brava, España, esta tesis analiza la generación de experiencias entre el privilegio, la vulnerabilidad, y la precariedad, y sus efectos contingentes sobre la construcción de estos procesos identitarios. El fenómeno de jubilados británicos que migran a España tiene una larga historia y se ha estudiado en antropología, gerontología, estudios de migración y más. No obstante, en el período entre 2019 y 2020 cuando se llevó a cabo esta investigación, la confluencia del Brexit y la pandemia de COVID-19 revitalizó el campo de estudio. Dichos cambios geopolíticos y sociosanitarios cuestionan las experiencias e identidades de los jubilados expatriados británicos; alterando los cimientos materiales sobre los que se construyeron sus privilegiados proyectos de vida migratoria. Así, creando un contexto único donde el privilegio y la incertidumbre se encuentran en la intersección de experiencias migratorias y de envejecimiento. A través de esto último, la tesis contribuye a debates antropológicos sobre la construcción contextualizada de identidades entre el yo y la sociedad; sobre los discursos acerca del envejecimiento del Norte Global y sus efectos en los proyectos identitarios en la vejez; y cuestiona los usos de las categorías migratorias tradicionales sobre el terreno. Dado que la identidad, el envejecimiento y la migración son conceptos polisémicos que han mutado a lo largo del tiempo, con sus subsecuentes repercusiones analíticas, esta investigación adopta una aproximación interseccional que reconoce y desarrolla los debates en los que están involucrados estos términos, y, asimismo, también capturando las conexiones entre las micro experiencias y las macroestructuras que evidencian las relaciones de poder y la perpetuación de desigualdades. Esto implica el estudio de etiquetas y sus prejuicios y estigmas adyacentes, apuntando cómo éstos transitan de un contexto sociocultural a otro, además de explorar cómo se construyen los sentimientos de pertenencia en el extranjero. Al examinar las experiencias migratorias de jubilación aparentemente privilegiadas de los informantes, esta tesis doctoral expone las complejidades entre el privilegio, la vulnerabilidad, la dependencia y la precariedad a través de las minucias de lo cotidiano. Así contribuyendo a debates empíricos y conceptuales más amplios en torno a la identidad, el envejecimiento y la migración

    Investigating the Effects of Network Dynamics on Quality of Delivery Prediction and Monitoring for Video Delivery Networks

    Get PDF
    Video streaming over the Internet requires an optimized delivery system given the advances in network architecture, for example, Software Defined Networks. Machine Learning (ML) models have been deployed in an attempt to predict the quality of the video streams. Some of these efforts have considered the prediction of Quality of Delivery (QoD) metrics of the video stream in an effort to measure the quality of the video stream from the network perspective. In most cases, these models have either treated the ML algorithms as black-boxes or failed to capture the network dynamics of the associated video streams. This PhD investigates the effects of network dynamics in QoD prediction using ML techniques. The hypothesis that this thesis investigates is that ML techniques that model the underlying network dynamics achieve accurate QoD and video quality predictions and measurements. The thesis results demonstrate that the proposed techniques offer performance gains over approaches that fail to consider network dynamics. This thesis results highlight that adopting the correct model by modelling the dynamics of the network infrastructure is crucial to the accuracy of the ML predictions. These results are significant as they demonstrate that improved performance is achieved at no additional computational or storage cost. These techniques can help the network manager, data center operatives and video service providers take proactive and corrective actions for improved network efficiency and effectiveness

    QoS-aware architectures, technologies, and middleware for the cloud continuum

    Get PDF
    The recent trend of moving Cloud Computing capabilities to the Edge of the network is reshaping how applications and their middleware supports are designed, deployed, and operated. This new model envisions a continuum of virtual resources between the traditional cloud and the network edge, which is potentially more suitable to meet the heterogeneous Quality of Service (QoS) requirements of diverse application domains and next-generation applications. Several classes of advanced Internet of Things (IoT) applications, e.g., in the industrial manufacturing domain, are expected to serve a wide range of applications with heterogeneous QoS requirements and call for QoS management systems to guarantee/control performance indicators, even in the presence of real-world factors such as limited bandwidth and concurrent virtual resource utilization. The present dissertation proposes a comprehensive QoS-aware architecture that addresses the challenges of integrating cloud infrastructure with edge nodes in IoT applications. The architecture provides end-to-end QoS support by incorporating several components for managing physical and virtual resources. The proposed architecture features: i) a multilevel middleware for resolving the convergence between Operational Technology (OT) and Information Technology (IT), ii) an end-to-end QoS management approach compliant with the Time-Sensitive Networking (TSN) standard, iii) new approaches for virtualized network environments, such as running TSN-based applications under Ultra-low Latency (ULL) constraints in virtual and 5G environments, and iv) an accelerated and deterministic container overlay network architecture. Additionally, the QoS-aware architecture includes two novel middlewares: i) a middleware that transparently integrates multiple acceleration technologies in heterogeneous Edge contexts and ii) a QoS-aware middleware for Serverless platforms that leverages coordination of various QoS mechanisms and virtualized Function-as-a-Service (FaaS) invocation stack to manage end-to-end QoS metrics. Finally, all architecture components were tested and evaluated by leveraging realistic testbeds, demonstrating the efficacy of the proposed solutions

    Summer/Fall 2023

    Get PDF
    corecore