Outage and Throughput Analysis of Cognitive Users in Underlay Cognitive Radio Networks With Handover

Samuel D Okegbile,Attahiru S Alfa,Bodhaswar T Maharaj

doi:10.1109/access.2020.3037787

Samuel D Okegbile, Attahiru S Alfa + Show 1 more

Open Access

https://doi.org/10.1109/access.2020.3037787

Copy DOI

Journal: IEEE Access	Publication Date: Jan 1, 2020
Citations: 36	License type: CC BY 4.0

Affiliation: University of Pretoria, University of Manitoba

Abstract

Interference characterization in cognitive networks with handover has received less attention in stochastic geometry-based interference management and control, especially in cognitive radio networks, because of the possibility of complicating the analysis of various performance metrics of interest, such as outage probability and throughput. However, because of the possible mobility that is observed in real practical systems, some of the receivers may be located outside the coverage regions of their paired transmitters. In order to ensure that any receiver located outside the coverage region of its paired transmitter continues to receive its required service from its paired transmitter while still achieving tractable analysis for various performance metrics of interest, we adopted multiuser diversity via packet relaying. With this approach, any secondary nodes waiting to transmit can be used to sustain coverage between any typical active transmitter and receiver pair, while reducing their own waiting period in the process. We obtained tractable analysis for outage probability, spectral efficiency and throughput and showed the effect of handover rate over the network performance. The outcomes of the numerical results show that the proposed approach is capable of improving the overall network performance by improving coverage and throughput among network users in the cognitive radio networks.

Highlights

The continuous demand for an effective and efficient data transmission service has necessitated the exploration of the benefits of the cognitive radio network (CRN) in tackling the issue of spectrum scarcity
We modelled interference in underlay CRN with handover using the stochastic geometry approach, considering the case where primary and secondary receivers may be located outside the coverage region of their tagged transmitters owing to mobility
The analysis of the outage probability for each network was based on the use of stationary point process analysis, simulation results show that such analysis accurately captures the performance of mobile users

Summary

INTRODUCTION

The continuous demand for an effective and efficient data transmission service has necessitated the exploration of the benefits of the cognitive radio network (CRN) in tackling the issue of spectrum scarcity. PUs or SUs cooperate among one another to increase transmission efficiency and throughput, while vertical cooperation ensures cooperation between PUs and SUs so as to aid the transmission opportunity probability for SUs. In this work, we modelled interference in underlay CRN with handover using the stochastic geometry approach, considering the case where primary and secondary receivers may be located outside the coverage region of their tagged transmitters owing to mobility. When the tagged receiver is located outside the coverage region of its paired transmitter owing to mobility, communication between the transmitter-receiver pair is achieved through the packet relaying technique In such a case, a tagged transmitter is considered to select any waiting secondary node that produces the highest signal at the tagged receiver through the multiuser diversity technique - a technique that can lead to handoffs.

SYSTEM MODEL

ANALYSIS OF THROUGHPUT

NUMERICAL RESULTS

CONCLUSION