THE EXPLOSIVELY growing demand for ubiquitous broadband wireless access has led to a significant increase in energy consumption by wireless communication networks. To counter this increase, future generations of wireless networks are expected to make use of renewable energy sources, e.g., wind, solar, tides, etc., to fulfill the everincreasing user demand, Sustainability Analysis and Resource Management for Wireless Mesh Networks with Renewable Energy Supplies while reducing the detrimental effects of conventional energy production. However, unlike traditional energy supplied from the electricity grid, renewable energy sources are intrinsically dynamic with unstable availability and time varying capacity. For example, a wind turbine usually provides intermittent power which depends on how windy the weather is. Although solar panels can provide relatively continuous power supply, the energy supply varies across the time of a day and the season of the year, and is influenced by atmospheric conditions and geography. As a result, when renewable energy is deployed to power wireless communication Sustainability Analysis and Resource Management for Wireless Mesh Networks with Renewable Energy Supplies networks, its dynamic and unreliable nature will affect the availability and efficiency of communications, and therefore will make energy-sustainable network design a necessity. Improving energy efficiency has long been a fundamental research issue in wireless communications, mainly because of the limited battery power of mobile terminals and/or the increasing cost of the energy from the electricity grid. Sustainability Analysis and Resource Management for Wireless Mesh Networks with Renewable Energy Supplies In traditional systems powered by batteries, the energy is a limited resource but it is stable during the battery lifetime. The electricity grid generally provides continuous power on demand with no stringent usage limit; however, this power is primary generated from limited and non-sustainable resources, such as coal, natural gas, and petroleum. In contrast, renewable energy sources are sustainable in the long term but are unstable and intermittently available in the short term. Sustainability Analysis and Resource Management for Wireless Mesh Networks with Renewable Energy Supplies As a result, the fundamental design criterion and the main performance metric have shifted from energy efficiency to energy sustainability in a network powered by renewable energy . While many existing works focus on energy efficiency, energy sustainability has not been well explored and deserves further investigation. Thus motivated, we first develop a mathematical model to study the “energy sustainability” performance of wireless devices theoretically and, based on this analysis, we further dimension the resource management and admission controlstrategies to improve the sustainable network performance under an energy sustainability constraint