As concerns about climate change, rising fossil fuel prices, and energy security increase, companies and governments around the world are committing great efforts to develop new technologies for green strategies addressing climate change globally and facilitating low greenhouse gas (GHG) development. The deployment of ubiquitous intelligent communication systems and networks can effectively improve the efficiency of current energy production, management, distribution and consumption, and integrate a growing number of renewable sources. ICT deployment in support of the smart grid and other sectors forces reconsideration of energy-awareness, especially where large numbers of devices are involved. The first track of the workshop is dedicated to networking, communication theory, information theory, and signal processing aspects of wireless networks composed of devices that are powered by smart grids and renewable power sources. Smart grids allow greater flexibility in the energy aware resource allocation for the ICT sector. In green wireless networks, renewable power sources can be used to replenish the energy of wireless network nodes as an alternative to a traditional power source. Renewable power sources and the smart grid open up new exciting possibilities in wireless communication and networking. However, there many theoretical and practical open problems.

In a cellular network, energy harvesting can be used to provide power in many elements of a telecom network, saving considerable costs in electricity supply and providing low maintenance monitoring. Powering mobile phone base stations with wind or solar power allows telecom networks to expand beyond the limits of the power grid. The possibility of re-distribution of the renewable energy in smart grids allows further efficient utilization, but leads to many challenges as well.

The second track of the workshop considers communication theory, information theory, and signal processing of energy harvesting communications on a smaller scale. In particular for wireless sensor networks, because of its ultra-low-power operation, small, wireless, autonomous sensors can be powered by harvesting ambient power which is scavenged in milliwatts or even microwatts. If these wireless sensors, which are spread throughout a home or factories, in-buildings or even outdoor to monitor all kind of environmental conditions, are powered by energy harvesting, there are no batteries to replace and no labor costs associated with replacing them, in other words, self-sustainable. More importantly, energy harvesting eliminates the need to replace batteries in impossible-to-reach sensors such as within the body or walls. Energy harvesting becomes a promising technology that enables smart cities, wide area rural communications, or next generation machine-to-machine communications. However, the design of communication systems has to take into account the fluctuating availability of energy source.

Another important focus of this workshop is on RF energy harvesting. RF energy is currently broadcasted from billions of radio transmitters around the world, including mobile telephones, handheld radios, mobile base stations, and television/ radio broadcast stations. The ability to harvest RF energy, from ambient or dedicated sources, enables wireless charging of low-power devices and has significant benefits to product design, usability, and reliability. Fundamental practical issues on realizing this ability leads to many interesting research problems.