Smart Grid Communications and Networking

Energy efficiency is increasingly gaining importance due to environmental awareness and the pressure to reduce operation costs. It has become one of the key requirements for our lives and will no doubt change the ways we design and operate future societies. In the past decades, there have been many efforts by both governments and organizations to improve the efficiency of the electric power grid system. Within past few years, smart grid technologies, using wireless metering infrastructures, have provided the grid operators and consumers with more information about the electric power grid. Although, considerable research progress has been made in the smart grid technologies, many problems still remain to realize a true smart grid. In particular, wireless communication is a promising means to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost. However, supporting wireless communication over smart grid poses significant challenges since the research requires understanding of both communication technologies and power systems. Our group aims to develop protocols and optimization tools to realize a "smarter" grid. Our current research interest include: distributed control of information in microgrids, vehicle-to-grid (V2G) system, demand and response system, big data analysis, and security and privacy.

  • "Big Data Analysis for Securing Smart Grid” funded by National Natural Science Foundation of China (NSFC), China (2013/07 ~ 2014/06).
  • “Designing Secure and Efficient Distributed Smart Grid” funded by Ministry of Science, ICT and Future Planning, Korea (2013/06 ~ 2016/05).
  • “User-Centered Dynamic Microgrid using Data Science Techniques” funded by Ministry of Science, ICT and Future Planning, Korea (2015/11 ~ 2018/10).

Green Networks

With the rapid growth and widespread of applications using wireless mobile communication technologies, e.g., worldwide interoperability for microwave access (WiMAX), IEEE 802.11-based wireless local area network (WLAN), Bluetooth, wireless sensor network (WSN), and vehicular ad-hoc network (VANET), the number of portable wireless mobile devices has grown rapidly and prompted research and development efforts to enhance the performance of the devices and supporting infrastructures. While processor speed and storage capacity have been increasing exponentially, advances in battery technology have been much slower, creating large gap between the energy demand and energy supply. Moreover, since mobile devices are driven by limited battery power, energy efficiency is critical for the performance and the lifetime of communication oriented mobile devices that consume high proportion of their total power on wireless network interfaces. Also, the energy consumption by the supporting infrastructures, e.g., base stations and intermediate network devices, is also important since it accounts for a large portion of operator’s expenses even though devices are not fully utilized and wasting energy. Our group aims to develop energy efficient protocols in both wired and wireless environments. Our current research interests include: energy efficient routing algorithms, sleep scheduling algorithms, cross-layer design, and integration with electric vehicles.


Network Security and Privacy

The number of mobile wireless computing devices continues to grow explosively since past decade. However, one of the major challenges for deployment of these devices is to provide secure communications and preserve privacy of users. Typical issues include authentication, confidentiality, integrity, non-repudiation, anonymity, and availability. Although, traditional cryptographic primitives (such as encryption, signature, and key agreement) are well established, security and privacy issues for specific network are either inefficient or not directly applicable. Our group aims to tackle security and privacy issues in emerging networks. Our current research interests include: security and privacy issues in mobile social networks, cyber physical security in smart grids, and distributed and secure system for cloud computing.

  • “Analysis of Network Security Breaches in Smart Grid” funded by National Security Research Institute, Korea (2013/03 ~ 2013/10)
  • "Global Advance Technology Center," funded by Korea Institute for Industrial Economics & Trade, Korea. (2015/07 ~ 2020/06) (collaborative funding with Pradipta De and Sael Lee)