EH-CRN (Energy Harvesting Cognitive Radio Network)
Introduction
Energy Harvesting Cognitive Radio Networks (EH-CRN) is a new paradigm in wireless communications that combines the cognitive radio technology with energy harvesting techniques. EH-CRN is considered as a promising solution for energy efficiency, spectrum utilization, and the Internet of Things (IoT) systems. In this article, we will discuss the EH-CRN, its components, architecture, operation, and potential applications.
Background
Cognitive Radio Networks (CRNs) have been introduced to address the spectrum scarcity problem by allowing secondary users to access the underutilized licensed spectrum. However, energy efficiency is still a critical issue in CRNs, especially in mobile and wireless sensor networks. Energy harvesting technology, on the other hand, has attracted great attention due to its potential to provide a sustainable and long-lasting energy source for wireless communication devices. Therefore, the combination of cognitive radio technology and energy harvesting techniques has led to the emergence of EH-CRN.
Components of EH-CRN
The EH-CRN consists of three main components: energy harvesting devices, cognitive radios, and a control system. Energy harvesting devices are used to harvest energy from the environment, such as solar cells, wind turbines, and thermal energy converters. The cognitive radio is responsible for spectrum sensing, spectrum management, and communication. Finally, the control system is used to manage and coordinate the operation of the EH-CRN.
Architecture of EH-CRN
The EH-CRN architecture is composed of three layers: the physical layer, the network layer, and the application layer. The physical layer is responsible for the energy harvesting and the wireless communication. The network layer is responsible for the spectrum sensing, spectrum management, and routing. Finally, the application layer is responsible for the application-specific functionalities, such as data gathering and processing.
Operation of EH-CRN
The EH-CRN operation can be divided into two phases: the energy harvesting phase and the communication phase. During the energy harvesting phase, the energy harvesting devices collect energy from the environment and store it in energy storage devices, such as batteries or supercapacitors. During the communication phase, the cognitive radio uses the harvested energy to sense the spectrum and select the optimal channel for communication. The cognitive radio also adjusts the transmission power to conserve energy and avoid interference with the primary users.
Potential Applications of EH-CRN
EH-CRN has a wide range of potential applications, including wireless sensor networks, machine-to-machine communication, and IoT systems. EH-CRN can be used in remote areas where access to a power source is limited, such as in agriculture, wildlife monitoring, and disaster management. EH-CRN can also be used in smart grids to improve the energy efficiency of the power distribution network.
Conclusion
EH-CRN is a promising solution for energy-efficient wireless communications. By combining energy harvesting technology with cognitive radio technology, EH-CRN can provide sustainable and long-lasting energy sources for wireless communication devices. EH-CRN has the potential to be used in a wide range of applications, including wireless sensor networks, machine-to-machine communication, and IoT systems.