Cognitive radio transmission under QoS constraints and interference limitations

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Akin, Sami; Gursoy, Mustafa Cenk: Cognitive radio transmission under QoS constraints and interference limitations. In: Eurasip Journal on Wireless Communications and Networking 2012 (2012), 301. DOI:

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Sum total of downloads: 63

In this article, the performance of cognitive transmission under quality of service (QoS) constraints and interference limitations is studied. Cognitive secondary users are assumed to initially perform sensing over multiple frequency bands (or equivalently channels) to detect the activities of primary users. Subsequently, they perform transmission in a single channel at variable power and rates depending on the channel sensing decisions and the fading environment. A state transition model is constructed to model this cognitive operation. Statistical limitations on the buffer lengths are imposed to take into account the QoS constraints of the cognitive secondary users. Under such QoS constraints and limitations on the interference caused to the primary users, the maximum throughput is identified by finding the effective capacity of the cognitive radio channel. Optimal power allocation strategies are obtained and the optimal channel selection criterion is identified. The intricate interplay between effective capacity, interference and QoS constraints, channel sensing parameters and reliability, fading, and the number of available frequency bands is investigated through numerical results.
License of this version: CC BY 2.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2012
Appears in Collections:Fakultät für Elektrotechnik und Informatik

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downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 53 84.13%
2 image of flag of China China 4 6.35%
3 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 2 3.17%
4 image of flag of No geo information available No geo information available 1 1.59%
5 image of flag of Russian Federation Russian Federation 1 1.59%
6 image of flag of United Kingdom United Kingdom 1 1.59%
7 image of flag of France France 1 1.59%

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