Results 271 to 280 of about 906,253 (320)
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Distributed Computing, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Halldórsson, Magnús M. +3 more
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Halldórsson, Magnús M. +3 more
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Auction-Based Spectrum Sharing
Mobile Networks and Applications, 2006We study auction mechanisms for sharing spectrum among a group of users, subject to a constraint on the interference temperature at a measurement point. The users access the channel using spread spectrum signaling and so interfere with each other. Each user receives a utility that is a function of the received signal-to-interference plus noise ratio ...
Jianwei Huang +2 more
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Dimensions of Spectrum Sharing
2011All spectrum sharing takes place in various dimensions or parameter spaces: frequency, information, space and time or in some combination thereof. In the following, each of these dimensions will be considered in more detail with examples drawn from established technologies and systems.
Jan Kruys, Luke Qian
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Approaches to spectrum sharing
IEEE Communications Magazine, 2005Many complain about severe spectrum shortage. The shortage comes from outdated spectrum policies that allows for little sharing. Regulators have granted licenses that offer exclusive access to the spectrum. When these licensees are not transmitting, the spectrum sits idle.
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Spectrum Sharing through Contracts
2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN), 2010Development of dynamic spectrum access and allo- cation techniques recently [6] have made feasible the vision of cognitive radio systems. However, a fundamental question arises: Why would licensed primary users of a spectrum band allow secondary users to share the band and degrade performance for them?
Dileep M. Kalathil, Rahul Jain
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Dynamic Spectrum Sharing Detectors
2007 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2007Dynamic frequency sharing provides a mean to more efficiently allocate frequency spectrum. For this to be accomplished the ambient spectrum has to be sensed and characterized. This paper presents how energy detection can be used to differentiate signals from noise for various operating environments.
Karl N. Steadman +2 more
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Spectrum Sharing Exploiting Spectrum Database for LPWA
2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN), 2019In the most of current low power wide area (LPWA), packet collisions of uplink communication are controlled by setting duty cycle (DC), which controls the transmission cycle not to exceed the predefined fixed threshold. However, as the number of LPWA nodes increases, the fixed DC fatally increases the number of packet collisions and degrades the ...
Yudai Yamazaki +4 more
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Simulation in spectrum sharing
Simulation and Modelling of Satellite Systems, 2002The radio spectrum is a limited resource. Its regulation and management have become increasingly important as a result of an ever-growing demand for wireless communication applications. Access to the radio spectrum is based on the Table of Frequency Allocations of the International Telecommunications Union (ITU) Radio Regulations.
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2016
Spectrum sharing for 5G is motivated by the fact that significantly more spectrum and much wider bandwidths than what is available today will be needed in order to realize the performance targets of 5G. First, spectrum sharing scenarios, i.e. vertical sharing and horizontal sharing, are summarized for different type of spectrum.
Gen Li +4 more
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Spectrum sharing for 5G is motivated by the fact that significantly more spectrum and much wider bandwidths than what is available today will be needed in order to realize the performance targets of 5G. First, spectrum sharing scenarios, i.e. vertical sharing and horizontal sharing, are summarized for different type of spectrum.
Gen Li +4 more
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Spectrum-Sharing Transmission Capacity
IEEE Transactions on Wireless Communications, 2011This paper analyzes spectrum sharing between multiple systems. The efficiency of spectrum sharing is determined primarily by interference, which is a function of the spatial densities of the transmitters in systems dependent on the chosen spectrum sharing method.
Jemin Lee +2 more
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