Abstract
In mobility management, detection of spectrum hole plays very important role for doing spectrum handoff mechanism. Operation of the cognitive radio depends on the spectrum sensing which is the most important task in case of cognitive radio network. Detection of spectrum holes (underutilized sub-bands of the radio spectrum) estimates average power, throughput and utilized time for each spectrum hole. But in case of reactive spectrum handoff mechanism, spectrum handoff delay becomes tedious task. So in order to make spectrum handoff mechanism efficient our scheme proposed spectrum handoff mechanism with negligible spectrum handoff delay. In this paper we had real time experimental setup with the spectrum handoff mechanism. We investigate algorithm for spectrum handoff mechanism which strongly minimizes spectrum handoff delay of cognitive radio network using spectrum detection method for sensing spectrum holes.
Highlights
Nowadays, poor utilization of licensed spectrum creates spectrum scarcity
For improved spectrum utilization [1], cognitive radio, a new technology introduced in wireless communications, has a solution to solve the problem of spectrum underutilization [2] [3]
The method of retransmission of the collided packets using discrete-time Markov chain has been used in the performance analysis of spectrum handoff for cognitive Radio ad-hoc networks without common control channel under homogeneous traffic [22]
Summary
Poor utilization of licensed spectrum creates spectrum scarcity. For improved spectrum utilization [1], cognitive radio, a new technology introduced in wireless communications, has a solution to solve the problem of spectrum underutilization [2] [3]. (2014) Performance Evaluation of Spectrum Detection in Cognitive Radio Network. An estimated noise variance is used to calculate the threshold used in the spectrum sensing based on energy detection They proposed a new analytical model to evaluate the statistical performance of the energy detection with cooperative spectrum sensing method. In case of performance of cognitive radio spectrum access with intra- and inter-handoff [16] is considered for the determination of the rate of inter-handoff. The method of retransmission of the collided packets using discrete-time Markov chain has been used in the performance analysis of spectrum handoff for cognitive Radio ad-hoc networks without common control channel under homogeneous traffic [22]. In an optimal spectrum handoff scheme which is designed for the cognitive mobile ad-hoc networks developed co-operative spectrum searching approach is designed. By using prior spectrum sensing information, the information is broadcasted to the nearby users which minimizes the delay that occurred during the spectrum handoff mechanism
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