1,004 research outputs found
Five Facets of 6G: Research Challenges and Opportunities
Whilst the fifth-generation (5G) systems are being rolled out across the
globe, researchers have turned their attention to the exploration of radical
next-generation solutions. At this early evolutionary stage we survey five main
research facets of this field, namely {\em Facet~1: next-generation
architectures, spectrum and services, Facet~2: next-generation networking,
Facet~3: Internet of Things (IoT), Facet~4: wireless positioning and sensing,
as well as Facet~5: applications of deep learning in 6G networks.} In this
paper, we have provided a critical appraisal of the literature of promising
techniques ranging from the associated architectures, networking, applications
as well as designs. We have portrayed a plethora of heterogeneous architectures
relying on cooperative hybrid networks supported by diverse access and
transmission mechanisms. The vulnerabilities of these techniques are also
addressed and carefully considered for highlighting the most of promising
future research directions. Additionally, we have listed a rich suite of
learning-driven optimization techniques. We conclude by observing the
evolutionary paradigm-shift that has taken place from pure single-component
bandwidth-efficiency, power-efficiency or delay-optimization towards
multi-component designs, as exemplified by the twin-component ultra-reliable
low-latency mode of the 5G system. We advocate a further evolutionary step
towards multi-component Pareto optimization, which requires the exploration of
the entire Pareto front of all optiomal solutions, where none of the components
of the objective function may be improved without degrading at least one of the
other components
Context-Aware Security for 6G Wireless The Role of Physical Layer Security
Sixth generation systems are expected to face new security challenges, while
opening up new frontiers towards context awareness in the wireless edge. The
workhorse behind this projected technological leap will be a whole new set of
sensing capabilities predicted for 6G devices, in addition to the ability to
achieve high precision localization. The combination of these enhanced traits
can give rise to a new breed of context-aware security protocols, following the
quality of security (QoSec) paradigm. In this framework, physical layer
security solutions emerge as competitive candidates for low complexity,
low-delay and low-footprint, adaptive, flexible and context aware security
schemes, leveraging the physical layer of the communications in genuinely
cross-layer protocols, for the first time.Comment: arXiv admin note: text overlap with arXiv:2011.0732
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