This book constitutes the thoroughly refereed post-conference proceedings of the 5th International Conference on Advanced Infocomm Technology, ICAIT 2012, held in Paris, France, July 2012. The 32 revised full papers presented together with 4 invited talks were carefully selected from 97 submissions. The papers are organized in topical sections on fixed mobile convergence and emerging networks technologies, performance and quality of service, fiber technologies and multimedia processing, communication softwares and services, security, sensor technologies and wireless systems, energy-aware networks and power management, and mobile ad-hoc, mesh and vehicular networks.