places emphasis on naming the data instead of their location. This design hopes to adapt to the current Internet's usage patterns due to the majority of internet's traffic being data retrieval and service access. It may result in stronger network security, routing scalability, and built-in support for conferencing applications. Content-Centric Networking is especially attractive in mobile wireless networks because of the decoupling of hosts and locations. More importantly, local sharing is natively supported, thus eliminate the need for redundant data dissemination. To this end, CCNx, Haggle, NetInf, and among others, are giving serious attempts at implementing the future Internet architecture. Currently, we are building conferencing tools on CCNx and integrating it with Junction.
J. Wei, D. Nguyen, C. Tzeng, S. Ramaswamy. "Collaborative Conference Applications in Content Centric Networks." Demo and Poster presented at The 1st CCNx Community Conference, Sept.9, 2011, Palo Alto, CA

Collision-Free Asynchronous Multi-Channel Access

Transmission over multiple channels raises a number of challenges including hidden terminals over multiple channels and node synchronization. The main question is: how do I assure that my neighbors aware of my channel selection in a multi-hop environment. In this work, we present a collision-free asynchronous multi-channel access protocol for Ad Hoc wireless networks using a single transceiver. This is accomplished through an asynchronous split phase together with an observation phase as well as an unique handshake. Nodes observe the control channel for a period of time before asynchronously switching to the negotiated channel
D. Nguyen, J.J. Garcia-Luna-Aceves, and K. Obraczka, "Collision-Free Asynchronous Multi-Channel Access in Ad Hoc Networks," (Update: fixed analysis errors) Proc. IEEE Globecom 2009 Ad Hoc, Sensor and Mesh Networking Symposium, 30 Nov. - 4 Dec., 2009, Honolulu, HI. slides
Source Code: ns-2 Implementation

Minstrel Linux Port (Google Summer Code)

Minstrel is a widely deployed and popular Linux rate control algorithm based on the Sample Rate Adaptation approach. Using exponentially weighted moving average (EWMA) statistics, it sorts out the best throughput, second best throughput and the highest probability of success for adapting rates. I ported the Minstrel implementation from Linux Kernel to ns-3 simulator
Collaborators: Ruben Merz (mentor), Tom Henderson, and Mathieu Lacage

MACE project (UC San Diego)

Mace/Macedon (Methodology for Automatically Creating, Evaluating, and Designing Overlay Networks) provides a platform for development, research, and deployment of Distributed Systems. I worked on network interface and automated database logging infrastructure.
Collaborators: Amin Vahdat (mentor) and Chip Killian

Nimrod (Monash University) and Rocks Cluster (SDSC)

Part of the Pacific Rim Undergraduate Experiences (PRIME) funded by National Science Foundation. I spent one summer doing research at Monash University in Australia. I worked on the Nimrod Grid Software as well as setting it on Rocks Clusters.
Collaborators: David Abramson (Monash University), Kim Baldridge (SDSC and UCSD), Philip Papadopoulos (SDSC), Slavisa Garic, Colin Enticott, and Tom Peachey.

BOINC-GAMESS project at San Diego Supercomputer Center (SDSC)

BOINC (Berkeley Open Infrastructure for Network Computing) is used for harnessing computer power for computational and scientific research. GAMESS is a computational software for quantum chemistry. I set up a working BOINC-GAMESS application and was the main developer behind the project.
Collaborators: Kim Baldridge (mentor), Karan Bhatia, Sriram Krisman, and Jerry Greenberg

Publications

D. Nguyen, J.J. Garcia-Luna-Aceves, C. Westphal. .Throughput-Centric Rate Adaptation for MIMO Systems.
in submission Preprint: http://users.soe.ucsc.edu/~duy/trams.pdf

D. Nguyen, J.J. Garcia-Luna-Aceves, C. Westphal. .Throughput Enabled Rate Adaptation in Wireless Networks. Proc. International Conference on Computing, Networking and Communications, San Diego, California, January 28-31, 2013 Preprint: http://users.soe.ucsc.edu/~duy/tera.pdf

J. Wei, D. Nguyen, J.J. Garcia-Luna-Aceves, K. Nichols .Experience with Conferencing Applications in Content Centric Networks. The 10th Annual IEEE CCNC- Multimedia Networking & Services & Applications Preprint: http://users.soe.ucsc.edu/~duy/cca.pdf

D. Nguyen, J.J. Garcia-Luna-Aceves, C. Westphal. .Multi-rate Adaptation with Interference and Congestion Awareness. Proc. 30th IEEE International Performance Computing and Communications Conference, Orlando, Florida, November 17-19, 2011.

D. Nguyen, J.J. Garcia-Luna-Aceves. .A Practical Approach to Multi-rate Adaptation for Multi-Antenna Systems. The 19th IEEE International Conference on Network Protocols (ICNP'11), Oct. 17-20, 2011, Vancouver, Canada

D. Nguyen, J.J. Garcia-Luna-Aceves, and K. Obraczka, "Collision-Free Asynchronous Multi-Channel Access in Ad Hoc Networks," Proc. IEEE Globecom 2009 Ad Hoc, Sensor and Mesh Networking Symposium, 30 Nov. - 4 Dec., 2009, Honolulu, HI.

S. Bromage, J. Koshimoto, C. Engstrom, M. Bromage, V. Petkov, B. Nunes, H. Taylor, K. Obraczka, S. Dabideen, M. Hu, R. Menchaca-Mendez, D. Nguyen, D. Sampath, JJ Garcia-Luna-Aceves, H. Sadjadpour, B. Smith, "SCORPION: A Heterogenous Wireless Networking Testbed", ACM SIGMOBILE Mobile Computing and Communications Review Volume 13 Issue 1, January 2009

Sudholt, W.; Baldridge, K.; Abramson, D.; Enticott, C.; Garic, S.; Kondric, C.; Nguyen, D. Application of Grid Computing to Parameter Sweeps and Optimizations in Molecular Modeling. Future Generation Computer Systems (Invited), 2005. 21, 27-35.