Hybrid MAC Protocol for Channel Allotment in Heterogeneous Cognitive Radio Networks

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Bharath Raj D, et. al.

Abstract

Cognitive radio (CR) is an emergent wireless communication technology. Due to its nature it meets scarcity spectrum, the CR has been provides a keen solution to challenge spectrum scarcity issues by permitting spectrum sharing. The existing static channel allocation system leads to spectrum scarcity. The existing CR medium access protocol CR-MAC protocols have issues like delay, packet collision, and quality of services (QoS) during channel choice randomly. We propose a novel hybrid MAC protocol in light of channel quality approach. The channel quality indicator (CQI) is adopted with each channel in cognitive radio network (CRN). The TDMA based slotted cognitive function (SCF) is used to maintain transmission control. Distributed coordination function (DCF) is used to manage the packets transmission. The priorities are assigned based on the channel weights respectively. The proposed system has minimized the congestion and delay using NS-2 simulation.

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