1. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 1 WLAN field trial in high speed moving environment Notice: This document has been prepared to assist IEEE 802.11. 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 grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2008-09-09 Authors:

2. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 2 Abstract We introduce our WLAN field trial in high speed moving environment (> 200km/h) –Packet loss measurement –Video Transfer

3. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 3 Packet loss measurement

4. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 4 Location Fuji Speedway in Japan –May, 2007 –Weather:cloudy (no rain) –Course length:4.5km –Home straight length:1.5km –F1 GP will be held here in next month

5. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 5 System IEEE802.11g OFDM6 Pseudo ad-hoc (No BSS/ Association) Transmitter transmits UDP broadcast packet (avoid retry) in 20ms interval. Receiver records captured packets by “tcpdump” with time stamp and all headers. Packet length is 100, 500, 1500byte including IP header. Each packet has sequential number as a part of payload for packet loss detection. Intel Celeron Atheros WLAN NetBSD Transmitter Vehicle Receiver Antenna Roadside Antenna 20ms 100B 500B1500B

6. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 6 Antenna Vehicle Roadside Gain: 3.5dBiGain: 6dBi

7. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 7 Antenna installation in vehicle

8. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 8 Installation at roadside Receiver Receivable Area RX1RX2

9. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 9 Antenna installation at roadside View from antenna

10. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 10 Packet loss Maximum speed is approximately 280km/h. Packet loss occurred only behind the antenna. (-90dBm is the minimum signal strength for connection while stopping) RX1

11. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 11 Video Transfer

12. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 12 Location JARI (Japan Automobile Research Institute) High Speed Test Course –Apr. 2003 –Oval course with banked curve –Length:5km IEEE802.11b AP with MISP

13. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 13 System Base Router Mobile Router Vehicle Antenna Roadside IEEE802.11b DS11 MIS protocol MPEG1 encoded video is transferred from vehicle to roadside. MIS protocol is a suitable protocol for high speed moving environment. It uses pseudo ad-hoc mode and has function like authentication, encryption… (See 05/859r0) Mobile router supports Mobile IP for handover. Antenna Hitachi SH-4 Intersil WLAN NetBSD PC ASHA

14. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 14 Antenna Vehicle Roadside Omnidirectional Gain: 3dBi Omnidirectional Gain: -1.27dBi

15. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 15 Antenna installation Vehicle antenna Roadside antenna

16. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 16 Video transferred from vehicle (moving in 260km/h)

17. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 17 Conclusion IEEE802.11 PHY can be used in high speed moving environment. (> 200km/h) But…. IEEE802.11 MAC has some issues in high speed moving environment especially on handover. (So we used MIS protocol instead of IEEE802.11 MAC.)

18. doc.: IEEE 802.11-08/1020r0 Submission September 2008 Hitoshi MORIOKA, ROOT Inc.Slide 18 Questions and Comments?