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Project: IEEEP802.15 Working Group for Wireless Personal Area Network(WPAN)

Project: IEEEP802.15 Working Group for Wireless Personal Area Network(WPAN). ) Submission Title: [ Study of mm wave propagation modeling to realize WPANs ] Date Submitted: [November 2003] Revised: []

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Project: IEEEP802.15 Working Group for Wireless Personal Area Network(WPAN)

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  1. Project: IEEEP802.15 Working Group for Wireless Personal Area Network(WPAN) ) Submission Title: [Study of mm wave propagation modeling to realize WPANs ] Date Submitted:[November 2003] Revised: [] Source: [ToshiyukiHirose & see slide 2] Company [Siemens k.k.] Address [20-14, Higashi-Gotanda 3-Chome Shinagawa-ku, Tokyo 141-8641, Japan] Voice [+81(3) 5423-8855], Fax [+81(3) 5423-8728], E-mail [toshiyuki.hirose@siemens.com] Re: [Millimeter wave propagation characteristics] Abstract: [60GHz-band Propagation characteristics are presented in this document ] Purpose: [Contribute to mm wave interest group for WPANs] Notice:This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual or organization. The material in this document is subject to change in form and content after further study. The contributor reserves 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 P802.15.

  2. Study of mm wave propagation modelingⅡto realize WPANs The following individuals support this proposal as co-authors: Akira AKEYAMA (NTT Advanced Technology Corp.) Kouichi SAKAMOTO (Murata Manufacturing Co., Ltd.) Ami Kanazawa (Communications Research Laboratory)

  3. Study of mm wave propagation modeling to realize WPANs 60GHz-Band is expected to realize a very high rate transmission system. In this document, several propagation characteristics are presented for the promotion of new system proposals. Overview of propagation model was presented as Doc.: IEEE802. 15.-03/0365 in Singapore meeting. In this document,more detail data are presented. Content ￭ Propagation characteristics in Wooden house ￭ Penetration loss of trees with/without leaves ￭ Propagation characteristics in train ￭ Propagation characteristics in cafeteria This measurement results are a summary of the experimental works done in a collaboration research project for Millimeter-wave Ad-Hoc communication in YRP.

  4. Propagation Path Image オフィス Train/Bus Conference Office Home/Cafeteria

  5. Equipment Wall side Door Transmitter Receiver Window side Turn table 3 m Window side Propagation characteristics in wooden houseMeasurement of reflection • Parameter • Antenna height：1m / Distance：3m • Angle : 0 to 360 degrees every 5 degrees • Tx antenna beam width：60° • Rx antenna beam width：15° • Polarization：Ｖ

  6. Tx Wall Wall Door Equipment Wall Door Transmitter Receiver Window Turn table 3 m Window Arrival signal level V (70GHz) Three significant signals arrived. 1st : direct signal 2nd : reflection from the wall 3rd : double reflection between door and window

  7. Delay spread Delay spread increased by a small changing of Rx antenna direction.

  8. Summary of propagation characteristics in Wooden house 1 time reflection level max: -20dB to direct signal 2 times reflection level max: -25dB to direct signal Delay spread in Off beam condition : 10nS or more (Non-acceptable effect for wall reflection wave communication) Small variation of Antenna direction affects the Delay Spread value.

  9. Penetration loss of trees with/without leaves 0 - 1 0 - 2 0 Loss - 3 0 V H V - 4 0 H - 5 0 5 0 2 4 6 8 1 0 1 2 Number of tree No leaf No Leaf With Leaf With leaves

  10. Summary of penetration loss of trees Penetration Loss by a tree : Without leaf, the loss is 2 to 4dB With leaf, the loss is 10dB to 22dB Penetration loss is in proportion to the number of trees

  11. Propagation in trainMeasurement in a train Parameter Tx Antenna height：2m Rx Antenna height: 1m Angle : 0 to 360 degrees every 5 degrees Tx antenna beam width：60° Rx antenna beam width：15° Polarization：Ｖ

  12. (0, 0) (0.5, 0.5) (3, 0.5) Multi-path arrival in a Train • Rx antenna direction was changed (0 ～360 degrees). • The reflection signals arrived from near window or wall.

  13. Train Environment -Delay Spread- Tx Rx Delay Profile Delay Spread

  14. Summary of propagation characteristics in Train The reflection signals arrived from near window or wall Delay spread is below 5 ns at 4m distance in Ad-Hoc Mode

  15. Scenery of a Cafeteria

  16. Propagation Test Site-cafeteria- 4m 8m 8m 0.25m ① ② ③ ④ 0.6m 1.5m 1.95m 0.6m 柱 柱 植　木 ⑤ ⑥ ⑦ 1.2m 0.15m ⑧ ⑨ ⑩ 1.2m 2.38m 4.8m 0.6m 1.18m 正面入口 6.9m レジ台 0.8m ウイング側入口 厨房 0.4m 金属 0.11m 5.13m 0.3m ガラス 0.15m 1.5m 0.91m パーティション（木材） column entrance 90° partition 0°

  17. Measuring Equipments Transmitter Receiver

  18. Specification of Measurement Level Calibration: propagation loss on the 1m free space path

  19. Propagation Loss 20 30 Free space 40 Path loss (dB) 50 60 70 Measured value 80 90 100 110 1 2 3 4 5 10 20 30 40 50 Distance (m) (a) Frequency: 282 MHz 20 30 Free space 40 Path loss (dB) 50 60 70 Measured value 80 90 100 110 1 2 3 4 5 10 20 30 40 50 Distance (m) (b) Frequency: 920 MHz ITU-R P1238-3 Ltotal=20log10f+Nlog10d+Lf(n)-28 (dB)

  20. Propagation Loss Relative to Free Space Level 30 Relative loss (dB) 20 10 0 -10 0 2 4 6 8 Distance (m) Freq.:70GHz Antenna BW : 15° BW : 60° NLoS

  21. Shadowing Loss (1)LoS Path (2)Shadowing loss by a human body

  22. Reflection Waves Window 90 TX 0 180

  23. Frequency Correlation Coefficient Window 90 TX 0 180 BW=60° θ=0° θ＝90，180，270° 270 θ＝12.7°

  24. Delay Profile

  25. Delay Spread 8 Delay Spread (ns) Freq.:70GHz Antenna BW : 15° BW : 60° NLoS 6 4 2 0 0 2 4 6 8 Distance (m)

  26. Summary of propagation in cafeteria Propagation loss free space loss Shadowing loss human body 20dB partition 25dB Delay spread 1ns (BW=15°) 3ns (BW=60°） Reflection waves very few

  27. Reference [1]T.Suzuki, et al, “Millimeter-wave Ad-Hoc Wireless Access System-(9)RMS Delay Measurements In Indoor Radio Channels-“TSMMW2002,p-9(2002-03) [2]N.Sakamoto, et al, “Indoor propagation Experiment at 60GHz and 70GHz-A study of propagation characteristic in an office environment-“ TECNICAL REPORT OF IEICE.RCS2002-3001,pp157-162(2003-03) [3]N.Kuribayashi, et al, “Millimeter-wave Ad-Hoc Wireless Access SystemⅡ-(4) (4)Receiving Power Time Variation Characteristics in 70GHz Band Indoor Propagation–“ TSMMW2003,2-4,(2003-03)  [4]F.Ohkubo, et al, “Millimeter-wave Ad-Hoc Wireless Access SystemⅡ-(5)Statistical characteristic of shadowing loss due to human movement –“ TSMMW2003,2-5,(2003-03) [5]N.Kuribayashi, et al, “Millimeter-wave Ad-Hoc Wireless Access System-(8)60GHz Band propagation Loss Characteristics Along the Surface of Wooden/Metallic Desk Planes-“ TSMMW2002,p-8(2002-03) [6]T.Hirose, et al, “Millimeter-wave Ad-Hoc Wireless Access System-(7) Strict Solution of Fresnel Zone Radius and Visibility Estimation-“ TSMMW2002,p-8(2002-03) [7]A.Akeyama, et al, “Propagation Characteristics in Indoor Environments” 2003 IEEE Topical Conference on Wireless Communication Technology (TCWCT2003) [8] A. Kanazawa, D. Ushiki, and H. Ogawa,"Practical Propagation Measurements for Millimeter-wave Ad-hoc Wireless System",WPMC2003, vol.2, pp. 507-511, Oct. 2003. [9] A. Kanazawa, N. Sakamoto, and H. Ogawa,"Propagation Measurements for Millimeter-wave Ad-hoc Wireless System in a train",WPMC2003, vol.2, pp. 512-516, Oct. 2003.

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