Project: IEEE P Working Group for Wireless Personal Area Networks N
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1 Project: IEEE P Working Group for Wireless Personal Area Networks N (WPANs( WPANs) Title: [VLC application trials] Date Submitted: [17 March, 2008] Source: [Dongjae Shin, D.K. Jung, Y.J. Oh, Taehan Bae, Hyuk-Choon Kwon, Chihong Cho, Jaeseung Son ] Company [Samsung Electronics Co.,LTD] Address [Dong Suwon P.O. Box 105, 416 Maetan-3dong, Yeongtong-gu, Suwon-si, Gyeonggi-do, Korea] Voice:[ ], FAX: [ ], [taehan.bae@samsung.com] Re: [] Abstract: [Some visible light communication (VLC) application trials are described in this document. The VLC applications are categorized. Some demonstrations and the feature of each categorized application are also presented.] Purpose: [Contribution to IEEE IG-VLC] 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 Slide 1
2 VLC application trials Samsung Electronics Slide 2
3 Contents Introduction Motivation VLC vs. RF Characteristic Demonstrations Mobile-to-mobile Infra-to-mobile (uni-direction) Infra-to-mobile (bi-direction) Applications Technical Requirement of Applications Summary Slide 3
4 VLC introduction VLC (Visible Light Communication) : New communication technology using Visible Light. Visible Light : Wavelength between ~400nm (750THz) and ~700nm (428THz) General Characteristic Visibility : Aesthetically pleasing Security : What You See Is What You Send. Health : Harmless for human body Unregulated : no regulation in optical frequency Using in the restricted area : aircraft, spaceship, hospital Eye safety Slide 4
5 VLC motivation Communication community trend Ubiquitous (Connect each other everywhere, every time) Security LED trend LED technology (efficiency, brightness) LED Cost Environmental trend Health Energy saving Intrinsic characteristic of VLC Visibility No interference / No regulation Slide 5
6 VLC vs. RF Characteristic Property VLC RF Bandwidth Unlimited, 400nm~700nm Regulatory, BW Limited EMI No High Line of Sight (LOS) Yes No Standard Beginning (IG-VLC) Matured Hazard No Yes Mobile To Mobile Visibility (Security) Power Consumption Distance Yes Relatively low Short No Medium Medium Visibility (Security) Yes No Infra to Mobile Infra Mobility LED Illumination Limited Access Point Yes Coverage Narrow Wide Slide 6
7 Demonstrations Mobile to Mobile (100Mbps,Samsung) Tx, Rx (~30Mbps,Univ. of Oxford) LED array (~1Gbps, Keio Univ.) High speed Music broadcasting (6Mbps, Univ. of Oxford) Infra to Mobile (10Mbps, Tamura Inc.) Sign board (10Mbps, Samsung) Infra to Mobile(VLAN) (4Mbps, Samsung) Low speed Audio system (100kbps, Hongkong Univ.) Infra to Mobile, VLCC (Keio Univ., NEC, Toshiba, Sony, Matsushita, Casio etc. ) (4.8kbps, illuminations, visible light ID, sign board, applications based on JEITA) Slide 7
8 Mobile-to-mobile What You See Is What You Send (WYSIWYS) 120 Mbps, 1m, Full duplex File transfer and video streaming PDA/UMPC 30 cm Slide 8
9 Mobile-to-mobile (protocol) Standby Transmitting Beam guiding User alignment Device discovery Start steaming Temporal blocking ( < 8 sec.) Streaming end Primary Screen D LS D LS TS D LS TS D LS TS Link Secondary Screen Slide 9
10 Mobile-to-mobile (Link performance) Coverage (cm) 120 Mbps 240 Mbps Distance (cm) Distance (cm) Slide Mbps log(ber) Distance (cm)
11 Mobile-to-mobile Slide 11
12 Mobile-to-mobile feature Modulation : NRZ Encoding : 8B/10B Optical Source : LD, LED Wavelength : 630nm PD : Silicon Protocol : Visibility support Beam Guiding& Discovery Alarm for Miss alignment Self Restoration Slide 12
13 Infra-to-mobile (bi-direction) doc.: IEEE <doc#> Information broadcasting from signboard Main function : Display, Indication, Text, Graphic Additional function : Broadcast additional information Public / commercial information Unspecified individuals RGB WDM transmission 20 Mbps, 3m, Uni-direction Slide 13
14 Infra-to-mobile (Link performance) modules RX lens data pattern driver driver free space sensor PIN PD driver drivers LEDs Power Meter sign board Experimental setup Data Rate = 10 Mbps -4-5 Data Rate = 20 Mbps RED BLUE GREEN RED+BLUE RED+GREEN BLUE+GREEN WHITE SAMSUNG Slide 14
15 Infra-to-mobile (Uni-direction) Sign board free space Slide 15
16 Infra-to-mobile (bi-direction) 4 Mbps, 3 m, bi-direction Secure indoor LAN Slide 16
17 Infra-to-mobile (Link performance) Downstream : White LED Upstream : LD Slide 17
18 Infra-to-mobile (Bi-direction) Slide 18
19 VLC Applications Application Mobile to Mobile Handheld device Portable device Contents-sharing Data transfer Mobile to Fixed CE Kiosk Portable device Handheld device File transfer Video streaming M-commerce Infra to Mobile Rx TRx CE Illuminator Sign-board Traffic Signal Portable device Handheld device Information-broadcast ITS Indoor LBS Indoor Navigation Networked Robot Slide 19
20 Technical Requirement of Applications Link Distance Rate Need to be considered Mobile to Mobile Bi-direction ~50cm ~100Mbps FOV (Field of View) Short range Mobile to Fixed Unidirection ~1m ~100Mbps Asymmetric high speed data rate High security Rx diffuser Unidirection High security Multi-path Cell planning Sync between light Infra to Mobile Bi-direction ~3m ~10Mbps Mobility Uplink mobility Define / Design the light ID Multiple access Infra network access Color Balancing (works as illuminator) Slide 20
21 Summary The VLC is new communication technology using Visible Light. Motivation Communication community trend LED trend Environmental trend Intrinsic characteristic of VLC Characteristic Demonstrations Mobile-to-mobile Infra-to-mobile (uni-direction / bi-direction) Applications Technical Requirement of Applications Slide 21
Project: IEEE P Working Group for Wireless Personal Area Networks N
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