Simulation and Basic Experiment of Inter Radio System Handover for Cognitive Radio

Hanaoka, Seishi; Yamamoto, Junpei; Wakayama, Koji; Yoshizawa, Shin; Hirata, Terumitsu

doi:10.1109/pimrc.2007.4394149

Cited by 2 publications

(2 citation statements)

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“…Some contributions (e.g. [3], [4], [5] and [6]) were recently made to improve the spectrum sharing between PUs and cognitive users (also called secondary or unlicensed users). In general, the difficulty lies in developing a spectrum access/sharing scheme that guarantees interference protection for PUs while meeting QoS requirements of secondary users (SUs).…”

Section: Introductionmentioning

confidence: 99%

“…In [4], a dynamic spectrum access MAC-protocol using busy-burst principle to avoid interference with PUs and reduce transmission delay has been proposed. In [5], the proposed scheme enables the cognitive radio terminal to switch from one frequency band to another according to the received-signal level; whereas in [6], the dynamic spectrum access of a cognitive radio is based on the level of the induced interference in the system. Most of these proposed approaches, however, are not QoS-aware; QoS aspects are not considered.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic spectrum access in heterogeneous networks

Hamouda¹,

Hamdaoui

2009

Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wireless

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The next generation of radio wireless networks is expected to support spectrum decision operations that will allow a cognitive radio terminal to share the frequency bandwidth with primary users without impairing their QoS requirements. This can indeed enhance the utilization of the limited spectrum resources, and help meet the growing bandwidth demand. In this paper, we propose a new, cross-layer algorithm that allows a cognitive terminal to share and access to either HSDPA or WiMAX licensed spectrum while giving priority to the primary users. This algorithm not only considers the interference caused by the cognitive terminal, but also enhances the achievable throughput of this cognitive terminal. Simulation results show the effectiveness of our spectrum access scheme. Under our proposed scheme, the achievable data rate of the cognitive radio terminal is increased by 30% when compared with that obtained under common access schemes.

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Section: Introductionmentioning

confidence: 99%