Resource allocation in heterogeneous cognitive radio sensor networks

Mohammed Al-Medhwahi,Borhanuddin Mohd Ali,Fazirulhisyam Hashim,Abdulsalam Alkholidi,A Sali

doi:10.1177/1550147719851944

Abstract

Cognitive radio sensor networks offer a promising means of meeting rapidly expanding demand for wireless sensor network applications in new monitoring and objects tracking fields. Several challenges, particularly in terms of quality of service provisioning, arise because of the inherited capability-limitation of end-sensor nodes. In this article, an efficient resource allocation scheme, improved Pliable Cognitive Medium Access Protocol, is proposed to tackle multilevel of heterogeneity in cognitive radio sensor networks. The first level is the network’s application heterogeneity, and the second level is the heterogeneity of the radio environment. The proposed scheme addresses scheduling and radio channel allocation issues. Allocation-decision making is centralized, whereas spectrum sensing is distributed, thereby increasing efficiency and limiting interference. Despite the limited capabilities of the sensor’s networks, the effectiveness of the proposed scheme also includes increasing the opportunity to utilize a wider range of the radio spectrum. improved Pliable Cognitive Medium Access protocol is quite appropriate for critical communications that gain attention in the next 5G of wireless networks. Simulation results and the comparison of the proposed protocol with other protocols indicate the robust performance of the proposed scheme. The results reveal the significant effectiveness, with only a slight trade-off in terms of complexity.

Highlights

And commercially interests in wireless sensor networks (WSNs) are increasing day by day
The improved Pliable Cognitive Medium Access protocol proposed in this study maintains the conventional characteristics of end-sensor node, copes with the required quality of service (QoS) for emerging wireless sensor applications, and allows more efficient utilization of the radio spectrum
Pliable cognitive medium access control protocol (PCMAC) maintains traditional WSN features such as the low complexity and the low power consumption at the same time it addresses a variety of node traffic criticality in homogeneous radio environments

Summary

Introduction

And commercially interests in wireless sensor networks (WSNs) are increasing day by day. It presents a novel scheduling and radio allocation scheme that is treating high important data and reducing intra-network and inter-network interference in the same time of maintaining the conventional end-sensor characteristics It enables targeting heterogeneous radio environments by allowing utilization of more channels belonging to different radio environments. Most of the existing studies either employ improper architecture of the network, for example, the ad hoc-based topology, or require significant changes for the power supply and the computational capability of the end-sensor node.[16,17,18] these works do not efficiently address the heterogeneous nature of the new wireless networks. The improved Pliable Cognitive Medium Access (iPCMAC) protocol proposed in this study maintains the conventional characteristics of end-sensor node, copes with the required QoS for emerging wireless sensor applications, and allows more efficient utilization of the radio spectrum.

Related work

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