31,125 research outputs found
Co-primary Spectrum Sharing for Inter-operator Device-to-Device Communication
The business potential of device-to-device (D2D) communication including
public safety and vehicular communications will be realized only if direct
communication between devices subscribed to different mobile operators (OPs) is
supported. One possible way to implement inter-operator D2D communication may
use the licensed spectrum of the OPs, i.e., OPs agree to share spectrum in a
co-primary manner, and inter-operator D2D communication is allocated over
spectral resources contributed from both parties. In this paper, we consider a
spectrum sharing scenario where a number of OPs construct a spectrum pool
dedicated to support inter-operator D2D communication. OPs negotiate in the
form of a non-cooperative game about how much spectrum each OP contributes to
the spectrum pool. OPs submit proposals to each other in parallel until a
consensus is reached. When every OP has a concave utility function on the
box-constrained region, we identify the conditions guaranteeing the existence
of a unique equilibrium point. We show that the iterative algorithm based on
the OP's best response might not converge to the equilibrium point due to
myopically overreacting to the response of the other OPs, while the Jacobi-play
strategy update algorithm can converge with an appropriate selection of update
parameter. Using the Jacobi-play update algorithm, we illustrate that
asymmetric OPs contribute an unequal amount of resources to the spectrum pool;
However all participating OPs may experience significant performance gains
compared to the scheme without spectrum sharing.Comment: Accepted to appear in IEEE Journal on Selected Areas in
Communications (JSAC
Survey of Spectrum Sharing for Inter-Technology Coexistence
Increasing capacity demands in emerging wireless technologies are expected to
be met by network densification and spectrum bands open to multiple
technologies. These will, in turn, increase the level of interference and also
result in more complex inter-technology interactions, which will need to be
managed through spectrum sharing mechanisms. Consequently, novel spectrum
sharing mechanisms should be designed to allow spectrum access for multiple
technologies, while efficiently utilizing the spectrum resources overall.
Importantly, it is not trivial to design such efficient mechanisms, not only
due to technical aspects, but also due to regulatory and business model
constraints. In this survey we address spectrum sharing mechanisms for wireless
inter-technology coexistence by means of a technology circle that incorporates
in a unified, system-level view the technical and non-technical aspects. We
thus systematically explore the spectrum sharing design space consisting of
parameters at different layers. Using this framework, we present a literature
review on inter-technology coexistence with a focus on wireless technologies
with equal spectrum access rights, i.e. (i) primary/primary, (ii)
secondary/secondary, and (iii) technologies operating in a spectrum commons.
Moreover, we reflect on our literature review to identify possible spectrum
sharing design solutions and performance evaluation approaches useful for
future coexistence cases. Finally, we discuss spectrum sharing design
challenges and suggest future research directions
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