Cross layer approach for effective spectrum management in cognitive radio ad hoc networks

Abstract

Cognitive Radio Ad Hoc Networks CRAHNs is a major application field of Cognitive Radio CR that provides high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques CR technology delivers better capabilities for effective utilization of the scarce and valuable spectrum resources It works in such a way that it allows unlicensed users Secondary User or SUs to access the spectrum holes that are left by the licensed users Primary Users or PUs The major challenge in CRAHNs is its heterogeneous nature in the spectrum This might occur due to location difference among different secondary users dynamic traffic of primary users and opportunistic spectrum access nature of secondary users However the sharing of the licensed spectrum among SUs without interfering with the transmission of other licensed users should also be taken care of This research work has proposed Co operative Routing and Game theory Based Scheduling CRGBS Fuzzy Based Resource Allocation FBRA optimal Relay Selection with spectrum sharing using PSO RS PSO and Dynamic Packet Shifting DPS for an effective spectrum management of CRAHNs The proposed system concentrates on the fluctuating nature of the available spectrum and conforms to Quality of Service QoS requirements The spectrum management in cognitive systems identifies the spectrum selects the appropriate spectrum band shares among the SUs and mobilizes between frequencies to avoid interference The Cross layer design can be used appropriately with the spectrum management that can lead to increased network efficiency and better QoS support in CR by exchanging information between different layers newline