During the last decade, we have witnessed fast developments of various networking technologies, and many forms of networking and systems 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, fixedmobile convergence, quality of service, variable connectivity, spontaneous networking, autonomic networking and other capabilities as the norm. Building on the success of the last eight years, the ninth International Conference on Ubiquitous and Future Networks (ICUFN 2017) 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 ICUFN 2017 solicits original, unpublished contributions in all aspects of ubiquitous and future networking and system. Submitted articles must not be concurrently considered elsewhere for publication. We also encourage authors to submit short papers on the early stages of research or development in progress, which present important new challenges. Position papers on new idea and industry papers are also welcome. The conference is organized by KICS (The Korean Institute of Communications and Information Sciences) with the technical co-sponsorship of IEEE Communications Society. Accepted and presented papers will be published in the ICUFN 2017 Conference Proceedings and submitted to IEEE Xplore as well as other Abstracting and Indexing (A&I) databases such as EI Compendex, ScienceDirect, Scopus, Web of Knowledge, Thomson ISI, and IET Inspect.Also Extended versions of selected papers will be published in the following international journals as a special section for the ICUFN 2017.