Samad Nejatian

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In cognitive radio networks, the secondary users (SUs) switch the data transmission to another empty spectrum band to give priority to primary users (PUs). In this paper, channel switching in cognitive radio mobile ad hoc networks (CR-MANETs) through an established route is modeled. The probability of channel availability in this route is calculated based(More)
The Cognitive Radio (CR) can delivers the environment to Secondary Users (SUs) of Wireless Mesh Network (WMN) to utilize unused spectrum of Primary Users (PUs) opportunistically. The CR can improve the spectrum usage of the WMN. However, this rises the some additional complexities for the SUs such as spectrum heterogeneity, unpredictable PU activity and(More)
² in cognitive radio (CR), CR users or also known as secondary users (SUs) are considered DV³YLVLWRUV´WRWKHlicensed spectrum. During the case when the primary user claims the band of the spectrum that is occupied by the SU WKH 68 ¶V ongoing call must be transferred to another unused spectrum band. The variation in spectrum band is called spectrum mobility.(More)
The aim of this study is to introduce a conceptual framework for the new approach Intelligent Proactive Pre-emptive Unified Spectrum Handoff (IP PRO-PUSH) algorithm is presented, which is a highly potential intelligent technology to intelligently address the spectrum scarcity challenges in Cognitive Radio Mobile Ad hoc Networks (CR-MANETs). The fact that(More)
Almost all institutions and organizations use Integrated Management duo to its efficiency. Irrespective to order or sector, they are interested to integrate their management systems into one unified system with a comprehensive set of documentation, politicizes, methods and processes. In order to create an integrated and unified command system, modeling of(More)
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