Route selection for multi-hop cognitive radio networks using reinforcement learning: an experimental study

Syed, A. R., Yau, K.-L. A., Qadir, J., Mohamad, H., Ramli, N. and Keoh, S. L. (2016) Route selection for multi-hop cognitive radio networks using reinforcement learning: an experimental study. IEEE Access, 4, pp. 6304-6324. (doi: 10.1109/ACCESS.2016.2613122)

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Abstract

Cognitive radio (CR) enables unlicensed users to explore and exploit underutilized licensed channels (or white spaces). While multi-hop CR network has drawn significant research interest in recent years, majority work has been validated through simulation. A key challenge in multi-hop CR network is to select a route with high quality of service (QoS) and lesser number of route breakages. In this paper, we propose three route selection schemes to enhance the network performance of CR networks, and investigate them using a real testbed environment, which consists of universal software radio peripheral and GNU radio units. Two schemes are based on reinforcement learning (RL), while a scheme is based on spectrum leasing (SL). RL is an artificial intelligence technique, whereas SL is a new paradigm that allows communication between licensed and unlicensed users in CR networks. We compare the route selection schemes with an existing route selection scheme in the literature, called highest-channel (HC), in a multi-hop CR network. With respect to the QoS parameters (i.e., throughput, packet delivery ratio, and the number of route breakages), the experimental results show that RL approaches achieve a better performance in comparison with the HC approach, and also achieve close to the performance achieved by the SL approach.

Item Type:Articles
Keywords:Channel estimation, learning (artificial intelligence), quality of service, spread spectrum communication, switches, systems architecture, throughput, cognitive radio, multi-hop network, reinforcement learning, route selection, spectrum leasing.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Keoh, Dr Sye Loong
Authors: Syed, A. R., Yau, K.-L. A., Qadir, J., Mohamad, H., Ramli, N., and Keoh, S. L.
College/School:College of Science and Engineering > School of Computing Science
Journal Name:IEEE Access
Publisher:IEEE
ISSN:2169-3536
ISSN (Online):2169-3536
Copyright Holders:Copyright © 2016 IEEE
First Published:First published in IEEE Access 4: 6304-6324
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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