ECG

Efficient Wireless System Design

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Wireless broadband access from mobile systems is among the largest system power consumers. In this project, we aim at improving its energy efficiency while meeting performance constraints. Our approach is system and we study solutions that can be implemented in wireless network interface card (WNIC) and software in a mostly standard-compliant manner. Our current focus is on directional antennas, both passive and active, for mobile systems.

Collaborators

Publications

  • Hang Yu, Lin Zhong, Ashutosh Sabharwal, and David Kao, "Beamforming on mobile devices: a first study," in Proc. ACM Int. Conf. Mobile Computing and Networking (MobiCom), September 2011. (related arXiv Technical Report) (PDF)
  • Ardalan Amiri Sani, Lin Zhong, and Ashutosh Sabharwal, "Directional antenna diversity for mobile devices: characterizations and solutions," in Proc. ACM Int. Conf. Mobile Computing and Networking (MobiCom), September 2010. (PDF)
  • Ardalan Amiri Sani, Hasan Dumanli, Lin Zhong, and Ashutosh Sabharwal, "Power-efficient directional wireless communication on small form-factor mobile devices, " in Proc. ACM/IEEE Int. Symp. Low Power Electronics and Design (ISLPED), August 2010. (PDF) (See the BeamSwitch technical report for a complete set of results and a video demo)
  • Hang Yu, Lin Zhong, and Ashutosh Sabharwal, "Beamsteering on mobile devices, network capacity and client efficiency," Technical Report 0623-2010, Rice University, June 2010. (PDF)
  • Hang Yu, Lin Zhong, and Ashutosh Sabharwal, "Adaptive RF chain management for energy-efficient MIMO transmission," in Proc. ACM/IEEE Int. Symp. Low Power Electronics and Design (ISLPED), August 2009. (PDF)
  • Hasan Dumanli, Ardalan Amiri Sani, Lin Zhong, and Ashutosh Sabharwal, "BeamSwitch: system solution for energy-efficient directional communication on mobile devices," Technical Report 0616-09, Rice University, June 2009. (PDF) (Video)
  • Husheng Li, Lin Zhong, and Kun Zheng, "Drowsy transmission: physical layer energy optimization for transmitting random packet traffic," in Proc. IEEE Conf. Computer Communications (INFOCOM), April 2009. (PDF)
  • Hasan Dumanli and Lin Zhong, "Demonstration: Energy-efficient wireless communication based on directional transmission from mobile access," in MobiCom'08, September 2008. (finalist for Best Student Demo) (PDF)
  • Jiayang Liu and Lin Zhong, "Micro power management of active 802.11 interfaces," in Proc. ACM/USENIX Int. Conf. Mobile Systems, Applications, and Services (MobiSys), June 2008. (PDF)
  • Ahmad Rahmati and Lin Zhong, "Context for Wireless: Context-sensitive energy-efficient wireless data transfer,"  in Proc. ACM/USENIX Int. Conf. Mobile Systems, Applications, and Services (MobiSys), June 2007. (PDF) (Traces and logger source code)

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