Abstract
The Wireless Mesh Networks (WMNs) technology has recently emerged as a promising high-speed wireless technology, which provides the last mile broadband Internet access and delivers integrated wireless communication solutions. Integrating the traditional wireless with new wireless technologies such as cognitive radio (CR) technology creates a platform for high-speed broadband communication. In a multihop ad hoc cognitive radio network (CRN) environment, the performance of the network is degraded by the routing protocols, which are adapted from the traditional wireless networks. In an endeavor to optimize the performance of the CRNs, existing routing protocols can be adapted and optimized. Secondly, new dynamic routing protocols can be designed to meet the requirements of CRNs. This paper investigates the existing routing protocols in WMNs and proposes a new routing protocol called extended Weighted Cumulative Expected Transmission Time (xWCETT). The xWCETT routing protocol was evaluated through network simulations using the NS 2. Its performance was evaluated with respect to the end-to-end average latency, the throughput, jitter, packet delivery ratio, and the normalized routing load. The comparative evaluation results show that the xWCETT achieves superior results in terms of average throughput, latency, and the normalized routing load.
Highlights
The realization of ubiquitous computing in recent years has brought greater and promising opportunities for users residing in rural and remote areas as well as the developing countries
The proposed scheme is based on joint routing and spectrum selection criteria that compute the most likely path that satisfies the requirements stated by the application
We proposed a spectrum-aware, spectrum-agile, and interference-aware routing scheme called the xWCETT routing protocol
Summary
The realization of ubiquitous computing in recent years has brought greater and promising opportunities for users residing in rural and remote areas as well as the developing countries. Greater advances in various technologies such as social networking, the online gaming, mobile voice over Internet protocol (VoIP), mobile cloud storage, and videoconferencing have been experienced These technologies require high-speed communication infrastructure that serves as an effective transport system. The CR technology is defined as a fully programmable wireless system that is capable of sensing its operating environment and intelligently adapting its transmission parameters [5, 6] These two technologies may be integrated to provide the generation of intelligent, frequency-switching, and autonomous mesh networks. Reliable and robust connectivity depends on the efficiency and effectiveness of a routing strategy employed Both the mesh routers and client nodes play a fundamental role in routing decision-making. The implementation and optimization of efficient routing protocol remain a significant part in the CR-WMN
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