Yongsen Ma
001 McGlothlin Street Hall
Department of Computer Science
College of William and Mary
Williamsburg, VA 23187, USA
yma AT cs.wm.edu
+1 (757) 945-8623

Biography

I am a Ph.D. student at the Department of Computer Science at the College of William and Mary. My research interests include wireless networks and mobile systems, with a focus on improving the performance and efficiency of real-world systems.

I received the M.S. degree from Shanghai Jiao Tong University and the B.S. degree from Shandong University, both on Control Science and Engineering. I was a Research Assistant at the Mobile and Communications Group of Intel at Shanghai.


Projects

802.11ax on NS3

Mar, 2014 to Aug, 2014

IEEE 802.11ax is the next generation WiFi standard which aims at High Efficiency WLAN (HEW) in high density scenarios. This project includes a NS3 simulation model, some PHY calibration results, and 5 patents for the IEEE 802.11ax standard. The simulation model includes 40,000 lines of C++ code, and all the source code and patents are owned by Intel. Some documents and calibration results can be found at the IEEE 802.11 website, and the related patents are listed below.

Mobile 802.11n

Mar, 2012 to Jun, 2013 Source Code Home Page

IEEE 802.11n introduces MIMO and provides high throughput for WiFi, but it needs more frequent measurement to acquire sufficient information for all possible MIMO settings. This project exploits both packet and physical level metrics to get accurate and fast wireless measurement for mobile 802.11n networks. It was written in 2,000 lines of C code based on Qualcomm Atheros's wireless driver ath9k.

GSM-R Monitoring

Sep, 2010 to Feb, 2012 Source Code Home Page

GSM-R networks provide wireless connections for high-speed railway. The GSM-R monitoring system passively monitors the wireless interface in real-time to improve the GSM-R reliability in extremely high-speed scenarios. The software was written in 4,000 lines of C# code, deployed on a Windows XP Embedded platform, and tested along the Beijing-Shanghai high-speed railway.

Zigbee on NS2

Mar, 2010 to Jun, 2010 Source Code Home Page

This project provides a performance evaluation of Zigbee networks based on NS2. The deployment of Zigbee nodes is in a 3-D topology. It provides a NS2 simulation model written in tcl, and the evaluation script written in awk.


Publications

Journal

  1. Yongsen Ma, Xiaofeng Mao, Pengyuan Du, Chengnian Long, Bo Li, and Yueming Hu. Dynamic estimation of local mean power of Rician fading channels in GSM-R networks. ACM/Springer Wireless Networks. June 2013. pdf

Conferences

  1. Yongsen Ma, Pengyuan Du, Xiaofeng Mao, and Chengnian Long. On-line and dynamic estimation of Rician fading channels in GSM-R networks. IEEE WCSP 2012. pdf slides
  2. Pengyuan Du, Lujin Luo, Yongsen Ma, and Chengnian Long. A dual-antenna based handover scheme for GSM-R network. IEEE WCSP 2012. pdf slides

Patents

  1. Yongsen Ma, Rongzhen Yang, Peng Meng, Qinghua Li, and Huaning Niu. Apparatus, Method and System of Multi-user Uplink Transmission, August 2014. US Patent.
  2. Yongsen Ma, Rongzhen Yang, Peng Meng, Qinghua Li, and Huaning Niu. Multi-user Block ACK Scheme for Wireless Broadband Communication System, September 2014. US Patent.
  3. Rongzhen Yang, Po-Kai Huang, Hujun Yin, Robert J. Stacey, Yongsen Ma, and Peng Meng. Access Point Assisted Spatial Reuse, September 2014. US Patent.
  4. Rongzhen Yang, Po-Kai Huang, Hujun Yin, Robert J. Stacey, Yongsen Ma, and Peng Meng. Finite Power Transmission Scheme for Low Cost Wireless Broadband System, September 2014. US Patent.
  5. Rongzhen Yang, Po-Kai Huang, Hujun Yin, Robert J. Stacey, Yongsen Ma, and Peng Meng. Dynamic CCA Scheme with Legacy Device Coexistance, October 2014. US Patent.
  6. Chengnian Long, Yongsen Ma, and Xiaofeng Mao. GIS-based link quality measurement system for GSM-R networks, July 2012. China Patent CN102595445A.
  7. Chengnian Long, Yongsen Ma, and Xiaofeng Mao. Dynamic measurement algorithm of received signal strength in GSM-R networks, July 2012. China Patent CN102571238A.
  8. Chengnian Long, Yongsen Ma, and Xiaofeng Mao. Online Um interface testing and warning system for GSM-R networks, May 2012. China Patent CN102438270A.