1. September 2009doc.: IEEE 802.15-12-0278-00-wng0
<month year>
4/15/2019<month year>
doc.: IEEE
May 2015
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Kookmin University Response to 15.7r1 CFA: Positioning issues of OCC based Vehicular Communication]
Date Submitted: [March, 2015]
Source: [Md. Shareef Ifthekhar, Trang Nguyen, Nirzhar Saha, Nam Tuan Le, Mohammad Arif Hossain, Chang Hyun Hong and Yeong Min Jang]
[Kookmin University]
Address [Kookmin University, Seoul, Korea]
Voice:[ ], FAX: [ ],
Re: []
Abstract:
Purpose: Call for Application Response
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
Yeong Min Jang, Kookmin University
<author>, <company>

2. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
May 2015
Kookmin University Response to 15.7r1 CFA: Positioning issues of OCC based Vehicular Communication
Yeong Min Jang
<author>, <company>

3. Contents OCC based V2V communication OCC based V2V positioning
May 2015
Contents
OCC based V2V communication
OCC based V2V positioning
Conclusion

4. OCC based V2V Communication (Advantage)
May 2015
OCC based V2V Communication (Advantage)
Negligible multipath fading and Doppler effects
Static channel impulse response compared with optical signal frequency
Minimum interference
Spatial separation of multiple light source in receiving plane
Simpler OCC link design than RF channel
Due negligible multipath fading and Doppler effect
Simultaneous data communication without complicated protocol
Each pixel acts as independent receiver

5. OCC based V2V Communication (Issues)
May 2015
OCC based V2V Communication (Issues)
Background noise from sun
Pixel could saturate due to high back ground noise from sun
hence unable to receive signal
Only LoS communication is possible for V2V communication
Camera frame rates vs. vehicle speed
Unable to receive data at time interval between two frames
For low frame rate camera, vehicle will travel more distance at that interval
Hence increase tracking complexity
Also increase collision probability
Perspective distortion
Due to viewing angle and distance
Data from multiple LED may not be resolved

6. OCC based V2V Positioning
May 2015
OCC based V2V Positioning
Why
To prevent collision
As GPS could determine only users’ vehicle position
It unable to determine neighbor vehicle position
RADAR and LADAR are expensive to use.
Advantage
Simultaneous communication and positioning
Cooperative vehicle positioning
Vision based positioning

7. OCC based V2V Positioning (Issues)
May 2015
OCC based V2V Positioning (Issues)
Out of focus issues
Limited camera FOV
Angular movement of vehicle
Angular rotation (Roll, Pitch, Yaw) of target and users’ vehicle affects the positioning accuracy
Computer Vision (CV) and OCC based combined approach
CV require ground truth (predefine known marker location) to estimate target vehicle position*.
OCC based combined approach could be used.
Ref: M.S. Ifthekhar, N. Saha, Y.M. Jang, “Stereo-vision-based cooperative-vehicle positioning using OCC and neural networks,” Optics Communications, 2015 (In Press)
*R. Hartley, A. Zisserman, “Multiple View Geometry in Computer Vision,” Cambridge University Press, March 2004

8. May 2015
Conclusion
As transmitter and receiver are continuously changing their position
Communication and positioning should be done simultaneously
If any vehicle move 40 km/h then it will move 11m/s.
So technical document (Receiver) should specify vehicle speed vs. allowable minimum camera frame rates for applications A4 and A7
Also technical documents (Transfer Mode) should consider to broadcast ID during data transfer mode for applications A4 and A7.
Identification of transmitter (for A4 and A7)
Receiver will receive data from multiple independent transmitters (Car lights or traffic lights) which is not MIMO.
Sometimes it may happen to resume communication with one or more transmitters due to brief out of sight.