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Abstract
A spectrum handoff model and optimal channel decision method based on Extenics have been proposed in order to resolve the optimal channel decision problem of spectrum handoff in Cognitive Radio Sensor Networks. The method of matter-element Extenics is used to analyses the spectrum handoff process. The channel state through the spectrum sensing and status information of the primary users is analyzed and transformed by matter-element Extenics. Then the parameters to determine the best channel are calculated on the basis of Extenics correlation function. Finally the optimal channel is selected. The simulation results show that the proposed method can improve spectrum utilization efficiency of Cognitive Radio Sensor Networks and can reduce the interrupt probability of second users.
Highlights
Cognitive Radio Sensor Networks (CRSN) are composed of Wireless Sensor Networks (WSN) and Cognitive Radio(CR) technology, can effectively solve the problem that the available spectrum resources are limited in WSN [1,2].CRSN have the following characteristics [3]: low energy consumption, simple hardware, self-organization, event-driven, etc
Because the CRSN have the characteristics such as simple hardware and low computational ability, and the Extenics is suitable for multi-attribute judgment under uncertainty and low computation required[12,13], this paper proposed a spectrum handoff model and an optimal channel decision method based on Extenics comprehensive considering various factors of spectrum handoff
This paper proposed a period prediction spectrum handoff scheme based on the Extenics and an optimal channel selection methods for CRSN
Summary
Cognitive Radio Sensor Networks (CRSN) are composed of Wireless Sensor Networks (WSN) and Cognitive Radio(CR) technology, can effectively solve the problem that the available spectrum resources are limited in WSN [1,2].CRSN have the following characteristics [3]: low energy consumption, simple hardware, self-organization, event-driven, etc. In CRSN, the SUs (second users, SU) can use the spectrum of PUs (Primary users, PU) only in the case of don’t have interfere with PUs. Once the PU appears, SU must vacate the occupied frequency band, search and switch to another idle channel, this process is called spectrum handoff [4]. The spectrum handoff is a multi-attribute comprehensive decision, need to consider various parameters to make the judgment such as the characteristics of channel, the accessing probability of PUs, the requirements of SUs and communication quality and so on [7]. Because the CRSN have the characteristics such as simple hardware and low computational ability, and the Extenics is suitable for multi-attribute judgment under uncertainty and low computation required[12,13], this paper proposed a spectrum handoff model and an optimal channel decision method based on Extenics comprehensive considering various factors of spectrum handoff
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