TY - GEN
T1 - Ripple II
T2 - 13th USENIX Symposium on Networked Systems Design and Implementation, NSDI 2016
AU - Roy, Nirupam
AU - Choudhury, Romit Roy
N1 - Funding Information:
We sincerely thank our shepherd Dr. Jonathan Smith and the anonymous reviewers for their valuable feedback. We are also thankful to Prof. Pramod Viswanath and Shaileshh Venkatakrishnan for the various discussions on this topic. We are grateful to Qualcomm, Huawei, and NSF (grant CNS-1430033) for partially funding this research.
PY - 2016
Y1 - 2016
N2 - We envision physical vibration as a new modality of data communication. In NSDI 2015, our paper reported the feasibility of modulating the vibration of a smartphone’s vibra-motor. When in physical contact with another smartphone, the accelerometer of the second phone was able to decode the vibrations at around 200 bits/s. This paper builds on our first prototype, but redesigns the entire radio stack to now achieve 30 kbps. The core redesign includes (1) a new OFDM-based physical layer that uses the microphone as a receiver (instead of the accelerometer), and (2) a MAC layer that detects collision at the transmitter and performs proactive symbol retransmissions. We also develop two example applications on top of the vibratory radio: (1) a finger ring that transmits vibratory passwords through the finger bone to enable touch based authentication, and (2) surface communication between devices placed on the same table. The overall system entails unique challenges and opportunities, including ambient sound cancellation, OFDM over vibrations, back-EMF based carrier sensing, predictive retransmissions, bone conduction, etc. We call our system Ripple II to suggest the continuity from the NSDI 2015 paper. We close the paper with a video demo that streams music as OFDM packets through vibrations and plays it in real time through the receiver’s speaker.
AB - We envision physical vibration as a new modality of data communication. In NSDI 2015, our paper reported the feasibility of modulating the vibration of a smartphone’s vibra-motor. When in physical contact with another smartphone, the accelerometer of the second phone was able to decode the vibrations at around 200 bits/s. This paper builds on our first prototype, but redesigns the entire radio stack to now achieve 30 kbps. The core redesign includes (1) a new OFDM-based physical layer that uses the microphone as a receiver (instead of the accelerometer), and (2) a MAC layer that detects collision at the transmitter and performs proactive symbol retransmissions. We also develop two example applications on top of the vibratory radio: (1) a finger ring that transmits vibratory passwords through the finger bone to enable touch based authentication, and (2) surface communication between devices placed on the same table. The overall system entails unique challenges and opportunities, including ambient sound cancellation, OFDM over vibrations, back-EMF based carrier sensing, predictive retransmissions, bone conduction, etc. We call our system Ripple II to suggest the continuity from the NSDI 2015 paper. We close the paper with a video demo that streams music as OFDM packets through vibrations and plays it in real time through the receiver’s speaker.
UR - http://www.scopus.com/inward/record.url?scp=85010705438&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85010705438&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85010705438
T3 - Proceedings of the 13th USENIX Symposium on Networked Systems Design and Implementation, NSDI 2016
SP - 671
EP - 684
BT - Proceedings of the 13th USENIX Symposium on Networked Systems Design and Implementation, NSDI 2016
PB - USENIX Association
Y2 - 16 March 2016 through 18 March 2016
ER -