The future of mobile information systems is transcending towards systems where the radio environment becomes controllable, programmable, and intelligent by leveraging emerging technologies such as intelligent reflecting surfaces and cognitive radios. These technologies possess perception, learning, reasoning, and decision-making capabilities where different parts of the system might be configured and controlled via intelligent and software-defined system paradigms. Energy efficiency is an important aspect in reconfigurable mobile information systems, not only due to the technological limitations on energy supplies but also due to the environmental impact caused by the information and communication technologies. Besides the environmental concerns about energy consumption in mobile information systems, and the possible reduction in operational expenditures, the need to improve energy efficiency becomes apparent, as the number of power-consuming functionalities required from these devices increases.

However, there still exist several critical challenges in the energy-efficient reconfigurable mobile information systems. A huge challenge is that the inherent mechanism of the integration of energy efficiency and reconfigurable mobile information system is not clear, which requires an intelligent approach to reveal the complicated mechanism. Another challenge is that the system design becomes much more complicated, where we should jointly take into account the energy consumption, the system reconfiguration, as well as the conventional performance metrics. Another challenge is the complicated system resource allocation, as the system resource dimension has increased significantly due to the reconfiguration, and some intelligent algorithms should be developed to fully utilize the system resource, in an intelligent and efficient approach.

To address the major challenges in energy-efficient reconfigurable mobile information systems, this Special Issue aims to provide a new comprehensive overview and create more ideas on the energy-efficient reconfigurable mobile information systems. This Special Issue will bring together researchers from academia, industry, and governmental agencies to promote the research and developments that pertain to this cutting-edge research topic. We welcome original research and review articles.

Potential topics include but are not limited to the following:

• Energy-efficient methods for reconfigurable mobile information systems
• Energy-saving reconfigurable hardware and devices
• Energy-efficient communication techniques for reconfigurable mobile information systems
• Design of energy-aware reconfigurable network architectures
• Intelligent reflecting surface aided mobile networks and protocols
• Energy-friendly software and applications supporting sustainability
• Development of renewable energy sources
• Industrial internet of things
• Machine learning algorithms for energy-efficient communications in reconfigurable mobile environments
• Smart and reconfigurable environments using intelligent reflecting surface aided mobile networks