research-article

PixNet: interference-free wireless links using LCD-camera pairs

Authors:

Samuel David Perli,

Dina KatabiAuthors Info & Claims

MobiCom '10: Proceedings of the sixteenth annual international conference on Mobile computing and networking

Pages 137 - 148

https://doi.org/10.1145/1859995.1860012

Published: 20 September 2010 Publication History

Abstract

Given the abundance of cameras and LCDs in today's environment, there exists an untapped opportunity for using these devices for communication. Specifically, cameras can tune to nearby LCDs and use them for network access. The key feature of these LCD-camera links is that they are highly directional and hence enable a form of interference-free wireless communication. This makes them an attractive technology for dense, high contention scenarios. The main challenge however, to enable such LCD-camera links is to maximize coverage, that is to deliver multiple Mb/s over multi-meter distances, independent of the view angle. To do so, these links need to address unique types of channel distortions, such as perspective distortion and blur.

This paper explores this novel communication medium and presents PixNet, a system for transmitting information over LCD-camera links. PixNet generalizes the popular OFDM transmission algorithms to address the unique characteristics of the LCD-camera link which include perspective distortion, blur, and sensitivity to ambient light. We have built a prototype of PixNet using off-the-shelf LCDs and cameras. An extensive evaluation shows that a single PixNet link delivers data rates of up to 12 Mb/s at a distance of 10 meters, and works with view angles as wide as 120 degree°.

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Index Terms

PixNet: interference-free wireless links using LCD-camera pairs
1. Networks
  1. Network types
    1. Mobile networks
    2. Wireless access networks

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Published In

cover image ACM Conferences

MobiCom '10: Proceedings of the sixteenth annual international conference on Mobile computing and networking

September 2010

402 pages

ISBN:9781450301817

DOI:10.1145/1859995

General Chair:
Nitin Vaidya
University of Illinois at Urbana-Champaign, USA
,
Program Chairs:
Suman Banerjee
University of Wisconsin-Madison, USA
,
Dina Katabi
Massachusetts Institute of Technology, USA

Copyright © 2010 ACM.

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 20 September 2010

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MobiCom/MobiHoc '10: The 16th Annual International Conference on Mobile Computing and Networking and The 11th ACM International Symposium on Mobile Ad Hoc Networking and Computing

September 20 - 24, 2010

Illinois, Chicago, USA

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https://doi.org/10.1109/LRA.2024.3517292
Zou XLiu JHan JWang Z(2024)Exploring Polarization in Hybrid Modulation for LED-Camera CommunicationIEEE Transactions on Mobile Computing10.1109/TMC.2023.3300315(1-14)Online publication date: 2024
https://doi.org/10.1109/TMC.2023.3300315
Han HXie KWang TZhu XZhao YXu F(2024)RescQR: Enabling Reliable Data Recovery in Screen-Camera Communication SystemIEEE Transactions on Mobile Computing10.1109/TMC.2023.3277212(1-13)Online publication date: 2024
https://doi.org/10.1109/TMC.2023.3277212
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