منابع مشابه
Spectrum Sharing In Dynamic Spectrum Access Networks
A study by Federal Communication Commission shows that most of the spectrum in current wireless networks is unused most of the time, while some spectrum is heavily used. Recently dynamic spectrum access (DSA) has been proposed to solve this spectrum inefficiency problem, by allowing users to opportunistically access to unused spectrum. One important question in DSA is how to efficiently share s...
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This paper considers non-cooperative and fully-distributed power-allocation for secondary-users (SUs) in spectrum-sharing environments when normalized-interference to each secondary-user is uncertain. We model each uncertain parameter by the sum of its nominal (estimated) value and a bounded additive error in a convex set, and show that the allocated power always converges to its equilibrium, c...
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dynamic spectrum access (DSA) that promises to alleviate the spectrum shortage problem in wireless networks. By employing spectrum sensing techniques or referring to the geolocation databases, a CR (or a CR-enabled secondary user) is able to intelligently decide which licensed spectrum band is free for use without causing harmful interference to licensed (or primary) users. Besides, the spectru...
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Machine type communications (or Machine-to-Machine / M2M) communications have emerged as an important paradigm in wireless communication networks. The current M2M standardization activities are presented and their implementation in 4G/LTE networks is described in detail. The chapter is divided in three parts that are related to the evolution of the Future M2M communication Networks. The first p...
متن کاملSpectrum sharing through distributed coordination in dynamic spectrum access networks
Spectrum sharing in open spectrum systems is a challenging problem, particularly since users experience dynamic spectrum availabilities that vary over time and location. In the absence of any centralize infrastructure, users coordinate their spectrum usage to support fair access of spectrum and avoid interference. One critical challenge is to construct an efficient signalling path in the presen...
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ژورنال
عنوان ژورنال: IEEE Transactions on Mobile Computing
سال: 2019
ISSN: 1536-1233,1558-0660,2161-9875
DOI: 10.1109/tmc.2018.2867022