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StarLego is a wireless system that can produce custom wireless signals over commodity devices without hardware modification. It is showcased by implementing a custom WiFi PHY preamble, and exhibits great promise to facilitate penetration of new wireless PHY techniques to existing wireless systems.

EasyPass exploits the excessive SNR margin in a wireless channel as a dedicated side channel for IoT traffic, and allow multiple access to the side channel by separating signals from different transmitters on the air. It allows multiple IoT devices to simultaneously transmit data over a congested wireless link without being delayed.

Device-free acoustic motion tracking allows a commodity mobile device to precisely track the human user’s motion, without applying any extra hardware tracker on the human body. We present a new system that ensures precise motion tracking over large targets by correctly interpreting the reflected acoustic signal and extracting the phase from the signal.

EmBee is designed to exploit the diversity of different wireless technologies’ spectrum utilization, so as to adaptively reserve occupied spectrum from the strong devices for weak wireless devices’ concurrent data transmissions. It is a new wireless PHY technique that enables cross-technology coexistence at zero cost or performance loss to these extremely weak wireless devices.

This work leverages the unique characteristics of image warping used in current VR applications, and fundamentally expand the scope of image warping to the entire VR lifespan to precisely capture the fluctuations of VR scene due to VR dynamics. We implemented our design over Android OS and Unity VR application engine, and demonstrated that our design can maximize the mobile VR performance over highly dynamic VR scenarios with 95% less amount of VR frame data being transmitted.

MUVR aims to remove the performance constraint of highly dynamic VR appliations by adaptively reusing the redundant VR frames being rendered for different VR users. The redundancy in each frame is decided at run-time by the edge cloud, which further reuses its redundant pixels compared with other frames. The design implementation over Android OS and Unity VR demonstrated that the design can reduce edge computation burden and transmitted VR frame data.

This work presents vMod, a lightweight and practical solution towards maximum wireless network throughput by redesigning the wireless link rates from discrete to continuous. The key idea of vMod is to modulate a fractional number of data bits into each symbol by employing the Variable-Length Code (VLC), which is able to statistically yield any link rate.