Dongsoo Han is Professor of Computer Science at KAIST. Dongsoo Han’s group, in collaboration with KTNET, built an indoor positioning and navigation system at COEX in 2010, and KAIST Indoor Localization System (KAILOS) to realize an indoor GPS system in 2014. In 2011, Dongsoo Han founded the indoor positioning research center (IPRC) at KAIST. Dongsoo Han is serving as director for the IPRC. In 2013, Dongsoo Han published the book “Infinite Challenge for Patent." Dongsoo Han's current research focus is on providing indoor positioning and navigation service at public buildings. Dongsoo Han is a member of IEEE and IEEE Computer society, and a board member of the ITS Korea society.