Tan Zhang (张檀)

Ph.D., Computer Sciences, Univesity of Wisconsin

Google PhD Fellow

Email: tzhang {at} cs.wisc.edu

CV: PDF (updated: October 2015)

About Me

I'm currently at Google. I graduated with a Ph.D. in Computer Sciences at UW-Madison. My thesis is available here. I worked in the Wisconsin Wireless and NetworkinG Systems (WiNGS) Lab guided by Prof. Suman Banerjee. My research area lies in wireless networking and mobile systems. I have received a Google PhD Fellowship in Mobile Systems (2015 - 2017).

My thesis work focuses on designing wireless networks based on a dynamic spectrum access model. I have explored this concept via networking over TV whitespace spectrum (unused TV channels) for various applications, e.g., providing Internet connectivity to metro buses, offloading cellular traffic in femto-cell networks, and supporting intelligent video surveillance over wide-area. I have also explored low-cost and scalable approaches to monitoring wireless spectrum at a large scale. This research thread includes a vehicule based measurement framework and a smartphone based spectrum sensing platform.

In my spare time, I enjoy many outdoor activities such as skiing, hiking, biking, kayaking, and scuba diving.


Conference proceeding

The Design and Implementation of a Wireless Video Surveillance System
Tan Zhang, Aakanksha Chowdhery, Paramvir Bahl, Kyle Jamieson, Suman Banerjee
ACM MobiCom 2015
A Wireless Spectrum Analyzer in Your Pocket
Tan Zhang, Ashish Patro, Ning Leng, Suman Banerjee
ACM HotMobile 2015
WiSense Android App is available here (Featured as a geek tool for power users in Google Play)
Patches to enable spectral scan in Ath9k driver is available here
A Vehicle-based Measurement Framework for Enhancing Whitespace Spectrum Databases
Tan Zhang, Ning Leng, Suman Banerjee
ACM MobiCom 2014 (Awarded third place of best presentation)
Web front-end to visualize data is available at here
Participated in Spectrum Observatory Project led by Microsoft to collect measurements over 4GHz spectral band.
Enhancing Vehicular Internet Connectivity using Whitespaces, Heterogeneity, and a Scouting Radio
Tan Zhang, Sayandeep Sen, Suman Banerjee
ACM MobiSys 2014
Inaccurate Spectrum Databases? Public Transit to its Rescue!
Tan Zhang, Suman Banerjee
ACM HotNets 2013
Scout: An Asymmetric Vehicular Network Design over TV Whitespaces
Tan Zhang, Sayandeep Sen, Suman Banerjee
ACM HotMobile 2013
[pdf] A Dual Technology Femto Cell Architecture for Robust Communication using Whitespaces
Sayandeep Sen, Tan Zhang, Milind Buddhikot, Suman Banerjee, Dragan Samardzija, Susan Walker
IEEE DySPAN, 2012 (Awarded best paper)


[pdf] Design and Implementation of an ``Approximate'' Communication System for Wireless Media Applications
Sayandeep Sen, Tan Zhang, Syed Gilani, Shreesha Srinath, Steve Schmitt, Suman Banerjee, Sateesh Addepalli
IEEE/ACM Transactions on Networking

Poster and Demo

V-Scope: An Opportunistic Wardriving Approach to Augmenting TV Whitespace Databases (poster)
Tan Zhang, Suman Banerjee
ACM MobiCom 2013 (Won first place in ACM student research competition)
Video Streaming using Whitespace Spectrum for Vehicular Applications (video demo)
Tan Zhang, Sayandeep Sen, Suman Banerjee
ACM MobiSys 2013


[pdf] Method and Apparatus for Wireless Communication using A Short-range Base Station with Multiple Radio Interfaces
of Different Technologies

Milind M Buddhikot, Sayandeep Sen, Dragan Samardzija, Tan Zhang, Susan Walker
US Patent Publication No: US20140105134 A1

Technical Report

[pdf] Sip: Speculative Insertion Policy for High Performance Caching
Hongil Yoon, Tan Zhang, Mikko H Lipasti
TR-1676, UW Computer Science Department, 2010


Summer 2015: Google, Seattle, USA
Working with Michael Buettner and Matt Welsh on improving a mobile web compression proxy for Chrome browser.
Winter 2014: University College London, UK
Worked with Prof.Kyle Jamieson on deploying an indoor wireless video surveillance system over the unlicensed ISM band.
Summer 2014: Microsoft Research, Redmond, USA
Worked with Victor Bahl and Aakanksha Chowdhery on building a real-time vision analytic system over TV whitespace networks.
Summer 2012: Bell Labs, Alcatel-Lucent, NJ, USA
Worked with Milind M. Buddhikot on deploying long-distance wireless backhauling networks over TV whitespaces.
Summer 2011: Bell Labs, Alcatel-Lucent, NJ, USA
Worked with Milind M. Buddhikot on developing whitespace radio prototypes and indoor whitespace femtocells for offloading cellular traffic.
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