LoFi:

LoFi is a WiFi based indoor localization/positioning system. It consists of two components: a modified WiFi network using off-the-shelf WiFi routers, and an iPhone app for now (Android version is in development). Here is the video showing how the LoFi system works.

Paperfocus:

I am building a social website for researchers these days. What? Why?

• Social networks (notably Facebook and Twitter) are dominating the Internet now, but unfortunately we (i.e., researchers) do not use them as they are not useful for work. Talking about research on Facebook/Twitter is weird.
• But social networks can be very useful for us and so I created Paperfocus --- the Twitter for researchers where we can:
  • Follow papers, people, conferences that we care about.
  • Share/Talk whatever we like about research. No weirdos any more! We are in the research world!
  • Ask/Answer questions about papers, conferences, etc that you care.
• Fancy a look? Try to search your name here if you published papers before in networking conferences, and claim your page following the instructions that you will see. Otherwise, welcome to register an account and be social!

Publications:

• Linghe Kong, Tianji Li, Minyou Wu, and Wei Shu , Eagle Eye: A Dual Radio Architecture in Delay Tolerant Networks, IEEE MASS 2012.
• Tianji Li, Mi Kyung Han, Apurv Bhartia, Lili Qiu, Eric Rozner, Yin Zhang, and Brad Zarikoff, CRMA: Collision-Resistant Multiple Access", best paper nominee of ACM Mobicom 2011.
• Song Han, Tianji Li, Chen Qian, Douglas Leith, Aloysius K. Mok, and Simon S. Lam, HartFi: An Energy-Efficient Localization System", to appear in ACM SIGCOMM Workshop on Energy and IT: from Green Networking to Smarter Systems.
• Tianji Li, Douglas Leith, and David Malone, Buffer Sizing for 802.11 Based Networks, IEEE/ACM Transactions on Networking, Feb 2011. The eBDP algorithm proposed in this paper is being implemented/tested in Linux kernel, see here and here to combat the so-called bufferbloat problem. (source code)
• Tianji Li, Douglas Leith, V. Badarla, David Malone, and Qizhi Cao, Achieving End-to-end Fairness in 802.11e Based Wireless Multi-Hop Mesh Networks Without Coordination, Mobile Networks and Applications (MONET), Feb. 2011.
• Tianji Li, Douglas Leith, and Lili Qiu Opportunistic Routing for Interactive Traffic in Wireless Networks , IEEE ICDCS 2010. (NS-2 code) (TCL code)
• Qizhi Cao, Tianji Li and Douglas Leith, Achieving Fairness in Lossy 802.11e Wireless Multi-Hop Mesh Networks , MeshTech 2009, co-located with IEEE MASS 2009.
• Tianji Li, Qiang Ni, David Malone, Douglas Leith, Thierry Turletti, and Yang Xiao, Aggregation with Fragment Retransmission for Very High-Speed WLANs, IEEE/ACM Transactions on Networking, Apr. 2009. (NS-2 code)
• Tianji Li and Douglas Leith, Buffer Sizing for TCP Flows in 802.11e WLANs, IEEE Communications Letters, Mar. 2008.(NS-2 code)
• Tianji Li, Qiang Ni, and Yang Xiao, Investigation of the Block ACK scheme in Wireless Ad-hoc Networks, Wiley Journal of Wireless Communications and Mobile Computing, 2006
• Ken Duffy, Douglas Leith,Tianji Li, and David Malone, Modeling 802.11 Mesh Networks, IEEE Communication Letters, Aug. 2006.
• Qiang Ni, Tianji Li, Thierry Turletti, and Yang Xiao, Saturation Throughput Analysis of Error-Prone 802.11 Wireless Networks, Wiley Journal of Wireless Communications and Mobile Computing, 2005.
• Tianji Li and Douglas Leith, Adaptive Buffer Sizing for TCP Flows in 802.11e WLANs, Chinacom 2008. (NS-2 code)
• Tianji Li, Douglas Leith, David Malone, and Venkataramana Badarla, Achieving End-to-end Fairness in 802.11e Based Wireless Multi-hop Mesh Networks, Chinacom 2008.
• Tianji Li, Qiang Ni, David Malone, Douglas Leith, Yang Xiao, and Thierry Turletti, A New MAC Scheme for Very High-Speed WLANs, IEEE WOWMOM 2006. (slides) (NS-2 code)
• Ken Duffy, Douglas Leith, Tianji Li, and David Malone, Improving Fairness in Multi-Hop Mesh Networks Using 802.11e, RAWNET 2006 workshop (in conjunction with IEEE WiOpt 2006)
• Tianji Li, Qiang Ni, Thierry Turletti, and Yang Xiao, Performance Analysis of the IEEE 802.11e Block ACK Scheme in a Noisy Channel, IEEE BroadNets 2005. (slides)

Awards:

• PI: SFI/EI Technology Innovation Development Award (TIDA) Feasibility Study , Jan. 2013 -- Dec. 2013.
• Co-PI: EU FP7 FLAVIA project, led by Giuseppe Bianchi, and locally by David Malone, 2010--2013.
• PI: IRCSET INSPIRE postdoc fellowship, Oct. 2009 -- Sep. 2012.
• PI: IRCSET EMBARK postdoc fellowship, Jan. 2008 -- Oct. 2009.