Energy efficiency in communications: part II [Guest Editorial]

This Feature Topic issue is a continuation in sequence of the previous November 2010 issue on "Energy Efficiency in Communications." Dedicated to the latest advances in various energy-efficient fixed and wireless communications and networking technologies, this second part (June 2011) of the Feature Topic further highlights the increasingly global interest in the technical potentials and approaches to mitigating energy consumption and the consequential environmental influences, and includes eight articles selected from a pool of high-quality paper submissions.