One of the main objectives of the METIS-II project was to enable 5G concepts to reach and convinc... more One of the main objectives of the METIS-II project was to enable 5G concepts to reach and convince a wide audience from technology experts to decision makers from non-ICT industries. To achieve this objective, it was necessary to provide easy-to-understand and insightful visualization of 5G. This paper presents the visualization platform developed in the METIS-II project as a joint work of researchers and artists, which is a 3D visualization tool that allows viewers to interact with 5G-enabled scenarios, while permitting simulation driven data to be intuitively evaluated. The platform is a game-based customizable tool that allows a rapid integration of new concepts, allows real-time interaction with remote 5G simulators, and provides a virtual reality-based immersive user experience. As a result, the METIS-II visualization platform has successfully contributed to the dissemination of 5G in different fora and its use will be continued after METIS-II.
This paper presents a novel user plane framework, tailored for different 5G services with diverse... more This paper presents a novel user plane framework, tailored for different 5G services with diverse and conflicting key performance indicators. Initially, this paper identifies the major challenges in the legacy user-plane approaches and highlights the up-to-date 5G standardization activities in this area. It further analyzes new functional requirements related to service-oriented design and the introduction of new mechanisms to address them. Subsequently, this paper discusses how various user plane design decisions related to the control/user plane split options, network slicing, and radio access network (RAN)core network (CN) interfacing can potentially impact the overall 5G architecture. For the latter, some key RAN/CN interface considerations and the interactions with CN given different protocols and quality of service models are investigated. INDEX TERMS 5G, radio access network, 3GPP, architecture.
2016 7th International Conference on the Network of the Future (NOF), 2016
Device to Device communications (D2D) is considered as a key technology component in fifth genera... more Device to Device communications (D2D) is considered as a key technology component in fifth generation (5G) of mobile communication, which anticipates higher user density and traffic volume than in present. D2D communication aims to offload base station from traffic routing by enabling direct link between communicating devices in proximity. D2D underlay allows a D2D pair to reuse resources with a cellular link, leading to better spectrum utilization. However, D2D transmission causes significant interference to cellular link with which it reuses physical resource block (PRB), thereby hindering cellular performance. Regulating D2D transmissions to mitigate the aforementioned problem would mean sub-optimal exploitation of D2D communications. As a solution, post-resource allocation power control at cellular users is proposed in this paper. Three schemes namely interference aware power control, blind power control and threshold based power control are discussed. Simulation results show reductions in dropping of cellular users due to interference from D2D transmissions, improvement in throughput at base station (uplink) while not hindering the D2D performance.
Mobile communication is arguably the most ubiquitously used technology in contemporary world, evo... more Mobile communication is arguably the most ubiquitously used technology in contemporary world, evolving towards its fifth generation (5G). The key challenges being faced by present day mobile communication are growing number of mobile users and subsequent high traffic volume posed by them. Providing uniform service quality and best quality of experience (QoE) in such dense scenarios is a major motive of 5G. Context awareness is a concept of extracting information from the user and his environment, and utilizing it to optimize user performance. Context awareness is recognized as one of the key pillars in enabling uniform quality of experience for mobile users. For instance, predicting the next cell for user transition, predicting the crowd formation in a cell etc., will assist the basestation to reserve or manage resources and prepare the cell well in advance for a future event, targeting to provide uninterrupted and uniform QoE. This paper investigates context aware procedures with a focus on user mobility, finds commonalities among different procedures and proposes a general framework to support mobility context awareness. The new information and interfaces which are required from various entities (e.g., vehicular infrastructure) are discussed. Further, a context aware resource allocation algorithm is designed, exploiting new interfaces and information arising from vehicular infrastructure. Simulation results demonstrate improvements in user throughput, thus validating the requirement of new interfaces.
Mobile communication is one of the most ubiquitously used technologies in today's world, evolving... more Mobile communication is one of the most ubiquitously used technologies in today's world, evolving towards its fifth generation (5G). Amidst increasing number of devices and traffic volume, one of the key focuses of 5G is to provide uniform service quality despite high mobility. In real world scenarios, user mobility is not random but rather direction oriented, based on its origin and destination. Further, several users exhibit repeated mobility patterns on daily basis (e.g., office goers, commuters in public transport etc.). Such mobility is termed as Diurnal mobility. Information of such diurnal mobility can assist in improving prediction accuracy of future user location (e.g., cells, routes). Knowledge of future user location will enable the designing of efficient resource management algorithms, aiming to make great service quality follow the user. In the presented work, information of diurnal mobility is used to enhance the accuracy of mobility prediction (next cell prediction as well as route prediction) in a realistic urban scenario. Further, using this context information about future routes and possible coverage holes in them, efficient resource allocation is done to sustain streaming/full buffer services, even in coverage holes. The simulation results show substantial improvements in user throughput as a result of context aware resource allocation, enabled by diurnal user mobility prediction.
2012 19th International Conference on Systems Signals and Image Processing, 2012
ABSTRACT We propose an improved method of secret key generation using the variations in wireless ... more ABSTRACT We propose an improved method of secret key generation using the variations in wireless channel. We construct reciprocal channel profiles at a pair of transceivers and enhance it using the l1-norm minimization technique. Thereafter preliminary keys are obtained that are synchronized by a localized information reconciliation technique. The privacy of the synchronized keys is enhanced by generating secure hashes. We implement the proposed method on a testbed and validate its performance to show decreased rates of bit disagreement of preliminary keys, at an increased key generation rate.
Research activities in METIS WP4 include several aspects related to the network-level of future w... more Research activities in METIS WP4 include several aspects related to the network-level of future wireless communication networks. Thereby, a large variety of scenarios is considered and solutions are proposed to serve the needs envisioned for the year 2020 and beyond. This document provides vital findings about several trade-offs that need to be leveraged when designing future network-level solutions. In more detail, it elaborates on the following tradeoffs: • Complexity vs. Performance improvement • Centralized vs. Decentralized • Long timescale vs. Short timescale • Information Interflow vs. Throughput/Mobility enhancement • Energy Efficiency vs. Network Coverage and Capacity Outlining the advantages and disadvantages in each trade-off, this document serves as a guideline for the application of different network-level solutions in different situations and therefore greatly assists in the design of future communication network architectures.
METIS WP4 covers research activities in network-level aspects of the advancement of wireless netw... more METIS WP4 covers research activities in network-level aspects of the advancement of wireless network technologies towards the year 2020 and beyond. The aim is to develop novel network-level technology concepts to address the challenges foreseen in future scenarios with regard to interference, traffic and mobility management issues. Moreover, another task of this work package is to propose functional enablers which can support the above potential solutions. This document provides a report of the ongoing progress in WP4 regarding the research topics agreed upon in IR 4.1, a high level description of the proposed concepts and approaches adopted by different partners. More specifically, the document describes, first set of potential network-level solutions and presents some first research results in order to position them with regards to the state of the art approaches. It also gives an overview of research activities to be considered later in WP4.
Mobility of commuters is not purely random but rather direction oriented and may be learned after... more Mobility of commuters is not purely random but rather direction oriented and may be learned after monitoring user movements for a couple of business days. Exploiting movement data and context information of diurnal user movements (public transportation, vehicular users, etc.) allows for predicting cell transitions and lays the basis e.g. for designing efficient resource reservation schemes or smart resource mapping approaches. In real life scenarios, several mobile users co-travel in public transport forming data intensive moving user clusters or moving networks [12]. Various load balancing solutions exist to manage congestion situations that could arise [4][5]. However, the crucial trigger for these solutions is timely prediction of arrival of moving user clusters or moving networks into a cell. This paper presents prediction and detection schemes that exploit context information for predicting user cell transitions and resulting congestion. These schemes are utilized to anticipate the arrival of data intensive moving user groups/moving networks, which are also referred to as "hotspots", into a cell. Simulation results demonstrate robust and timely prediction of these events and their applicability for handover optimization and smart resource management even at high velocities.
One of the main objectives of the METIS-II project was to enable 5G concepts to reach and convinc... more One of the main objectives of the METIS-II project was to enable 5G concepts to reach and convince a wide audience from technology experts to decision makers from non-ICT industries. To achieve this objective, it was necessary to provide easy-to-understand and insightful visualization of 5G. This paper presents the visualization platform developed in the METIS-II project as a joint work of researchers and artists, which is a 3D visualization tool that allows viewers to interact with 5G-enabled scenarios, while permitting simulation driven data to be intuitively evaluated. The platform is a game-based customizable tool that allows a rapid integration of new concepts, allows real-time interaction with remote 5G simulators, and provides a virtual reality-based immersive user experience. As a result, the METIS-II visualization platform has successfully contributed to the dissemination of 5G in different fora and its use will be continued after METIS-II.
This paper presents a novel user plane framework, tailored for different 5G services with diverse... more This paper presents a novel user plane framework, tailored for different 5G services with diverse and conflicting key performance indicators. Initially, this paper identifies the major challenges in the legacy user-plane approaches and highlights the up-to-date 5G standardization activities in this area. It further analyzes new functional requirements related to service-oriented design and the introduction of new mechanisms to address them. Subsequently, this paper discusses how various user plane design decisions related to the control/user plane split options, network slicing, and radio access network (RAN)core network (CN) interfacing can potentially impact the overall 5G architecture. For the latter, some key RAN/CN interface considerations and the interactions with CN given different protocols and quality of service models are investigated. INDEX TERMS 5G, radio access network, 3GPP, architecture.
2016 7th International Conference on the Network of the Future (NOF), 2016
Device to Device communications (D2D) is considered as a key technology component in fifth genera... more Device to Device communications (D2D) is considered as a key technology component in fifth generation (5G) of mobile communication, which anticipates higher user density and traffic volume than in present. D2D communication aims to offload base station from traffic routing by enabling direct link between communicating devices in proximity. D2D underlay allows a D2D pair to reuse resources with a cellular link, leading to better spectrum utilization. However, D2D transmission causes significant interference to cellular link with which it reuses physical resource block (PRB), thereby hindering cellular performance. Regulating D2D transmissions to mitigate the aforementioned problem would mean sub-optimal exploitation of D2D communications. As a solution, post-resource allocation power control at cellular users is proposed in this paper. Three schemes namely interference aware power control, blind power control and threshold based power control are discussed. Simulation results show reductions in dropping of cellular users due to interference from D2D transmissions, improvement in throughput at base station (uplink) while not hindering the D2D performance.
Mobile communication is arguably the most ubiquitously used technology in contemporary world, evo... more Mobile communication is arguably the most ubiquitously used technology in contemporary world, evolving towards its fifth generation (5G). The key challenges being faced by present day mobile communication are growing number of mobile users and subsequent high traffic volume posed by them. Providing uniform service quality and best quality of experience (QoE) in such dense scenarios is a major motive of 5G. Context awareness is a concept of extracting information from the user and his environment, and utilizing it to optimize user performance. Context awareness is recognized as one of the key pillars in enabling uniform quality of experience for mobile users. For instance, predicting the next cell for user transition, predicting the crowd formation in a cell etc., will assist the basestation to reserve or manage resources and prepare the cell well in advance for a future event, targeting to provide uninterrupted and uniform QoE. This paper investigates context aware procedures with a focus on user mobility, finds commonalities among different procedures and proposes a general framework to support mobility context awareness. The new information and interfaces which are required from various entities (e.g., vehicular infrastructure) are discussed. Further, a context aware resource allocation algorithm is designed, exploiting new interfaces and information arising from vehicular infrastructure. Simulation results demonstrate improvements in user throughput, thus validating the requirement of new interfaces.
Mobile communication is one of the most ubiquitously used technologies in today's world, evolving... more Mobile communication is one of the most ubiquitously used technologies in today's world, evolving towards its fifth generation (5G). Amidst increasing number of devices and traffic volume, one of the key focuses of 5G is to provide uniform service quality despite high mobility. In real world scenarios, user mobility is not random but rather direction oriented, based on its origin and destination. Further, several users exhibit repeated mobility patterns on daily basis (e.g., office goers, commuters in public transport etc.). Such mobility is termed as Diurnal mobility. Information of such diurnal mobility can assist in improving prediction accuracy of future user location (e.g., cells, routes). Knowledge of future user location will enable the designing of efficient resource management algorithms, aiming to make great service quality follow the user. In the presented work, information of diurnal mobility is used to enhance the accuracy of mobility prediction (next cell prediction as well as route prediction) in a realistic urban scenario. Further, using this context information about future routes and possible coverage holes in them, efficient resource allocation is done to sustain streaming/full buffer services, even in coverage holes. The simulation results show substantial improvements in user throughput as a result of context aware resource allocation, enabled by diurnal user mobility prediction.
2012 19th International Conference on Systems Signals and Image Processing, 2012
ABSTRACT We propose an improved method of secret key generation using the variations in wireless ... more ABSTRACT We propose an improved method of secret key generation using the variations in wireless channel. We construct reciprocal channel profiles at a pair of transceivers and enhance it using the l1-norm minimization technique. Thereafter preliminary keys are obtained that are synchronized by a localized information reconciliation technique. The privacy of the synchronized keys is enhanced by generating secure hashes. We implement the proposed method on a testbed and validate its performance to show decreased rates of bit disagreement of preliminary keys, at an increased key generation rate.
Research activities in METIS WP4 include several aspects related to the network-level of future w... more Research activities in METIS WP4 include several aspects related to the network-level of future wireless communication networks. Thereby, a large variety of scenarios is considered and solutions are proposed to serve the needs envisioned for the year 2020 and beyond. This document provides vital findings about several trade-offs that need to be leveraged when designing future network-level solutions. In more detail, it elaborates on the following tradeoffs: • Complexity vs. Performance improvement • Centralized vs. Decentralized • Long timescale vs. Short timescale • Information Interflow vs. Throughput/Mobility enhancement • Energy Efficiency vs. Network Coverage and Capacity Outlining the advantages and disadvantages in each trade-off, this document serves as a guideline for the application of different network-level solutions in different situations and therefore greatly assists in the design of future communication network architectures.
METIS WP4 covers research activities in network-level aspects of the advancement of wireless netw... more METIS WP4 covers research activities in network-level aspects of the advancement of wireless network technologies towards the year 2020 and beyond. The aim is to develop novel network-level technology concepts to address the challenges foreseen in future scenarios with regard to interference, traffic and mobility management issues. Moreover, another task of this work package is to propose functional enablers which can support the above potential solutions. This document provides a report of the ongoing progress in WP4 regarding the research topics agreed upon in IR 4.1, a high level description of the proposed concepts and approaches adopted by different partners. More specifically, the document describes, first set of potential network-level solutions and presents some first research results in order to position them with regards to the state of the art approaches. It also gives an overview of research activities to be considered later in WP4.
Mobility of commuters is not purely random but rather direction oriented and may be learned after... more Mobility of commuters is not purely random but rather direction oriented and may be learned after monitoring user movements for a couple of business days. Exploiting movement data and context information of diurnal user movements (public transportation, vehicular users, etc.) allows for predicting cell transitions and lays the basis e.g. for designing efficient resource reservation schemes or smart resource mapping approaches. In real life scenarios, several mobile users co-travel in public transport forming data intensive moving user clusters or moving networks [12]. Various load balancing solutions exist to manage congestion situations that could arise [4][5]. However, the crucial trigger for these solutions is timely prediction of arrival of moving user clusters or moving networks into a cell. This paper presents prediction and detection schemes that exploit context information for predicting user cell transitions and resulting congestion. These schemes are utilized to anticipate the arrival of data intensive moving user groups/moving networks, which are also referred to as "hotspots", into a cell. Simulation results demonstrate robust and timely prediction of these events and their applicability for handover optimization and smart resource management even at high velocities.
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Papers by Nandish Kuruvatti