Content-Centric Future Internet Architecture Design (2010 - 2014)

Project motivation :
Way back in 1960¡¯s, the current Internet was originally conceived and designed as an interconnection of hosts. It is now fast evolving towards an inter-network of services, multimedia contents, people, and ¡°things,¡± and such change warrants a paradigm shift from host-centric to content-centric networking. The need for paradigm change has also been fueled by growing concerns with data traffic explosion, security and privacy issues encountered on a daily basis, especially with wide deployment of social network services. It is anticipated that, at least over the next 5 to 10 years, significant qualitative and quantitative changes to the Internet as we know today will be driven by the rapid proliferation of mobile wireless devices and sensors, which has already outnumbered wired PCs. Such mobile, wireless, and sensor – so called Internet of Things (IoT) – requirements represent new network architecture design challenges. In this work, such design challenges have been identified and future-proof researches have been conducted focused on content-centric Future Internet paradigm.

What I have done :

Press Release


Human mobility modeling and its impact to wireless networking applications (2005 - 2010)

Project motivation :
The performance of wireless networks such as routing and hand-off is highly correlated with the movement patterns of wireless device holders. As humans are often carriers of mobile communication devices, simulating human mobility is important in evaluating the performance of mobile networks. So to develop a human mobility model that resembles real human movement patterns and evaluate wireless networking applications is really important.

What I have done :
We have developed a new statistical model that simulates human mobility patterns, mimicking the way people move over the course of a day, a month or longer. The model is the first to represent the regular movement patterns of humans using statistical data. The model has a host of potential uses, ranging from land use planning and evaluation of wireless networking applications to public health studies of disease outbreak. We gave global positioning system (GPS) devices to approximately 100 volunteers at five locations in the U.S. and South Korea and tracked the participants' movements over time. We found that people tend to perform multiple activities in clusters that are in close proximity to each other - such as going to a bank, a dry-cleaner and a pharmacy that are all located on the same street. Furthermore, people will try to make the most efficient use of their time and effort by clustering activities together that are in geographical proximity to each other. These patterns are best explained by statistical processes called self-similar points of visits and power-law distribution of jumping distances. The realistic human mobility model could be used by civil engineers to plan roads, by public health officials to study virus outbreak spread, or by telecommunication companies for planning where to locate cell-phone towers. Our model has been published in world top conferences such as INFOCOM 2008 and 2009. Recently, it has been released to various presses both in US and Korea.

Press Release

Network Management Architecture Design & Operations Support System (OSS) Software Development (1998 - 2005)

Project motivation :
As network technologies have tremendously evolved and the customer demand for telecommunications services has increased so fast, the need for OSS (i.e. network management system) to process various service orders and manage a lot of equipments has become bigger and bigger. To meet these requirements, to develop OSS that has special features such as time-to-market quick deployment, extensible architecture and simple user interface is really important.

What I have done :
I have 8 years of working experience as a software developer and a technical leader in KT Laboratory. My main job was to develop and deploy network management systems for various network equipments such as ATM (Asynchronous Transfer Mode) or ADSL (Asymmetric Digital Subscriber Line). I was involved in two big projects. The first one is to design a nation-wide ATM network architecture and develop its network management system. It also includes the deployment of network devices and its management system. I worked as both a network designer and software developer. Through this project, I could obtain real knowledge on high speed networks, software development, commercial network management system deployment and etc. Based on my achievements at the first project, I could get a chance to work as a leader for the next project. The second project is to develop a web-based integrated network management system, called NeOSS (New OSS), that manages most of major network devices in KT. Through this project, I could get the valuable experience to lead and organize a team which has over a few hundreds of developers. Also deploying a nation-wide commercial system was a valuable experience.

NeOSS summary (2001 - 2005) :

Korean Information Superhighway summary (1998 - 2000) :