Results 131 to 140 of about 15,831,729 (172)
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On the usefulness of spectrum prediction for dynamic spectrum access
2016 8th International Conference on Wireless Communications & Signal Processing (WCSP), 2016Spectrum prediction, as one enabling technique for dynamic spectrum access (DSA), has recently been received ever-increasing research attention. Most related studies (explicitly or implicitly) assume that spectrum prediction is useful for DSA. However, it does't fundamentally clear when spectrum prediction is really beneficial.
Jing Zhang +3 more
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Advanced Dynamic Channel Access Strategy in Spectrum Sharing 5G Systems
IEEE Wireless Communications, 2017 5G wireless communications aim at providing higher data rates, spectral efficiency, and energy efficiency than 4G. To achieve this target, the spectrum resource with low utilization is emptied out for 5G refarming.
Muhammad Khurram Khan +2 more
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Dynamic spectrum access and management [Dynamic Spectrum Management
IEEE Wireless Communications, 2010This article addresses a subject that is ripe for application and is approaching necessity for the continued expansive growth in the use of wireless for broadband multimedia communications. If we carry on business as usual in broadcast, public service and paid auctions in assigning spectrum without regard to actual empirical full time use, we will find
Bijan Jabbari +2 more
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Spatial distributed dynamic spectrum access
2013 IEEE International Conference on Communications (ICC), 2013The spatial aspect of distributed dynamic spectrum access (DSA) in a wireless ad hoc network is usually overlooked in the literature. By using tools from stochastic geometry, we analytically characterized the spatial distribution of users and subsequent interference in the network.
Ching-Yueh Kao +2 more
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A Markov Process for Dynamic Spectrum Access
2011 4th IFIP International Conference on New Technologies, Mobility and Security, 2011In order to increase the efficient spectrum usage and to mitigate the current spectrum scarcity, dynamic spectrum access is considered to be an emerging technique. In this paper, based on the concept of dynamic spectrum access, we propose a Markov process that models the two-way interaction process between a primary and a cognitive radio user for ...
Mir, Usama +3 more
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Dynamic spectrum access for small cells
2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013More flexible spectrum access policies that take advantage of the cognitive radio capabilities of small cells are required to improve the suboptimal spectrum utilization at small cells. However, care must be taken to ensure that interference from autonomously deployed small cells is tightly controlled when developing such policies.
Ahmed Alsohaily, Elvino S. Sousa
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A partial spectrum transmission method for dynamic spectrum access
2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, 2009This paper proposes a partial spectrum transmission (PST) method for dynamic spectrum access (DSA). For DSA, it is preferable to select modulation scheme which is appropriate for the low-priority user's condition and radio environment by taking into account the required E b /N 0 , frequency efficiency and PARR.
Yasunori Futatsugi +2 more
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Dynamic spectrum access based on interruptible spectrum leasing
Wireless Networks, 2012Dynamic spectrum access (DSA) based on interruptible spectrum leasing allows secondary users (SUs) to lease a licensed, but idle, spectrum that is owned by primary users (PUs) on condition that the PUs preempt the access to the leased spectrum. This paper considers a DSA scenario where the SUs opportunistically use the primary spectrum in addition to ...
Im, SY Im, Soo-Yeol +4 more
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Information Sharing in Spectrum Auction for Dynamic Spectrum Access
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference, 2009Spectrum under-utilization is one of the bottlenecks of the development of wireless communication, and Dynamic Spectrum Access (DSA) is envisioned as a novel mechanism to solve the problem of spectrum scarcity. Spectrum Auction has been recognized as an effective way to achieve DSA, wherein the primary spectrum owner (PO) acts as an auctioneer who has ...
Hui Yu 0002 +7 more
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A Spectrum Surveying Framework for Dynamic Spectrum Access Networks
IEEE Transactions on Vehicular Technology, 2009Dynamic spectrum access networks and wireless spectrum policy reforms heavily rely on accurate spectrum utilization statistics, which are obtained via spectrum surveys. In this paper, we propose a generic spectrum-surveying framework that introduces both standardization and automation to this process, as well as enables a distributed approach to ...
Dinesh Datla +2 more
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