During the last decade, we have witnessed fast developments of various networking technologies, and many forms of networking are becoming core parts of our daily lives. With the proliferation of future wireless technologies and electronic devices, there is a fast growing interest in ubiquitous and future networks. In the days to come, we expect that the ubiquitous communication and networking technologies will become ubiquitous along with the emergence of many future networking technologies. The ubiquitous and future network will offer multiservice, multimedia services convergence, mobility, service ubiquity and context awareness, fixed-mobile convergence, quality of service, variable connectivity, spontaneous networking, autonomic networking and other capabilities as the norm. Building on the success of the last four years, the Fifth International Conference on Ubiquitous and Future Networks (ICUFN 2013) aims at addressing advances in research on ubiquitous and future networks, covering topics ranging from technology issues to emerging applications and test-bed developments. ICUFN 2013 solicits original, unpublished contributions in all aspects of ubiquitous and future networking. Submitted articles must not be concurrently considered elsewhere for publication. The conference is organized by KICS and the School of Electronics and Telecommunications, Hanoi University of Science and Technology(HUST) with the technical co-sponsorship of IEEE Communications Society.