Se Gi Hong | Projects

10/2011 ~ Present
Heterogeneous Network (HetNet) Project
Hughes Network Systems, LLC
Multiple networking system

Propose a deployable and controllable multihoming system, which combines a satellite network and a terrestrial network (4G LTE), to enhance network services.
Design network system architecture and implement the prototype of the system.

Publication

Se Gi Hong and Chi-Jiun Su,“ASAP: Fast, Controllable, and Deployable Multiple Networking System for Satellite Networks,” (To be appeared) In Proceeding of IEEE Conference on Global Communications, San Diego, CA, Dec. 2015.

09/2009 ~ 08/2011
Internet Cache on Wheels (ICOW) Project
Columbia University
Opportunistic wireless networks for public transit systems

Defined network resource limitation and allocation problems of opportunistic networks in public transit systems.
Proposed a system-level solution to increase content availability and system usability.
Developed system architecutre, built prototype, evaluated performance and analyzed the system.

Publication

Se Gi hong, SungHoon Seo, Henning Schulzrinne, and Prabhakar Chitrapu, “ICOW: Internet Access in Public Transit Systems,” IEEE Communications Magazine, Vol. 53, No. 6, pp. 134 - 141, 2015.

05/2009 ~ 08/2009
Hybrid Wireless Network Project
InterDigital Communications, LLC (Summer Internship)

Security issues on authentication, authorization, accounting, and privacy in hybrid networks.
Categorized security architectures in hybrid networks and raised security problems.

09/2007 ~ 05/2009
Permission-Based Sending (PBS) Project
Columbia University
Control plane signaling architecture for programmable routers

Proposed a signaling architecture for network traffic authorization, aiming to prevent denial-of-service (DoS) attacks and other forms of unauthorized traffic.
Exploited control plane signaling protocol architecture and secure authorization (permission).
Implemented this project using netfilter, Click modular router and NSIS (FreeNSIS).

Publication

Se Gi Hong and Henning Schulzrinne, “PBS: signaling architecture for network traffic authorization,” IEEE Communications Magazine, Vol. 51, No. 7, pp. 89 - 96, 2013.

Se Gi Hong, Henning Schulzrinne and Swen Weiland, “Signaling architecture for network traffic authorization,” In Proceeding of IEEE Conference on Global Communications, Miami, FL, Dec. 2010.

Se Gi Hong and Henning Schulzrinne, “PBS NSLP: Network Traffic Authorization,” IETF, Internet Draft, April, 2014, work in progress.

06/2007 ~ 08/2007
Evaluation of a DHT-based P2P System
Bell Labs at Alcatel-Lucent (Summer Internship)
DHT-based P2P control messages

Evaluated the control message overhead created by the DHT-based P2P system under various churn rates and different networking sizes.
Simulated this project using OMNeT++ and OverSim.

Publication

Se Gi Hong, Volker Hilt, and Henning Schulzrinne, “Evaluation of Control Message Overhead of DHT-based P2P System,” Bell Labs Technical Journal (BLTJ), Vol. 13, No. 3.

01/2006 ~ 05/2007
Seven Degrees (7DS) Project
Columbia University
Distributed wireless networks

Measurements of Multicast Service Discovery

Measured and analyzed multicast service discovery traffic in a campus wireless network.
Analyzed different service discovery delay models in terms of packet overhead and service discovery delay under different network sizes and mobilities.

Accerelating Service Discovery

Proposed and algorithm to accelerate service discvory in wireless Zero Configuration Networking (Zeroconf) mobile ad hoc networks.
Allowed users to discover network topology changes and new services in real-time while minimizing network overhead.
Implemented and tested this project on Linux, using C.

P2P Information Exchange

Worked on data exchanges on wireless mobile ad hoc networks by providing an application-level set of protocol services that will enable exchange of information between peer devices.
Implemented and tested this project on Linux using C, and also implemented and tested it using LEAF (Linux Embedded Application Firewall), an embedded Linux distribution, on a WRAP (Wireless Router Application Platform).

Publication

Se Gi Hong, Suman Srinivasan, and Henning Schulzrinne, “Measurements of Multicast Service Discovery in a Campus Wirless Network,” In Proceeding of IEEE Conference on Global Communications, Honolulu, Hawaii, Nov. 2009.

Se Gi Hong, Suman Srinivasan and Henning Schulzrinne, “Accelerating Service Discovery in Ad-hoc Zero Configuration Networking,” In Proceeding of IEEE Conference on Global Communications, Washington D.C., Nov. 2007. [pdf]

Suman Srinivasan, Arezu Moghadam, Se Gi Hong and Henning Schulzrinne, “7DS - Node Cooperation and Information Exchange in Mostly Disconnected Networksi,” In Proceeding of IEEE International Conference on Communications, Glasgow, Scotland, June 24 - 28, 2007. [pdf]

01/2004 ~ 12/2005
The Armstrong Project
Columbia University
Funneling-MAC protocol

Worked on a localized and sink-oriented MAC protocol in wireless sensor networks, focusing on congestion control and aggregation of information.
Wrote a C++ code of this protocol and tested it on NS-2 simulator.

Pulication

Gahng-Seop Ahn, Emiliano Miluzzo, Andrew T. Campbell, Se Gi Hong and Francesca Cuomo, “Funneling-MAC: A Localized, Sink-Oriented MAC For Boosting Fidelity in Sensor Networks,” In Proc. of Fourth ACM Conference on Embedded Networked Sensor Systems (SenSys 2006), Boulder, Colorado, USA, Nov. 1-3, 2006. [pdf]