Request for VLC Interest Group

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					         Nov 2007                                                           doc.: IEEE 802.15-07/0911r0
  Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [Request for a VLC interest group]
Date Submitted: [November 2007]
Source: [see next page] Company []
Address []
Voice:[], FAX: [], E-Mail:[etwon@samsung.com]
Re: []
Abstract: []
Purpose: [formation of interest group]
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(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 P802.15.




         Submission                                 Slide 1                            Eun Tae Won, Samsung
Nov 2007                                   doc.: IEEE 802.15-07/0911r0




                 Look Who’s Coming
             Visible Light Communications




                        2007. 11. 12

                  Telecommunication R&D Center

               Global Standards & Research Lab.

Submission                   Slide 2                 Eun Tae Won, Samsung
Nov 2007                                                   doc.: IEEE 802.15-07/0911r0

 Contents


Title : Look who’s coming – VLC             Information Broadcasting of VLC

Contents                                       Experimental setup

                                               Feasibility Test
Ubiquitous connectivity

New Idea for the Communication?
                                            LED as a light source
Introduce of the VLC
                                            Network Access
Application scenario
                                            Technical Fields to be discussed
Peripheral Interface of VLC
     Basic experimental setup               Technical Issues

     Feasibility Test                       Conclusion – Look what’s coming



Submission                        Slide 3                            Eun Tae Won, Samsung
Nov 2007                                 doc.: IEEE 802.15-07/0911r0

 Ubiquitous Connectivity


   Let there be
    LIGHT !!


                  Existing or Being everywhere
                         at the same time




Submission              Slide 4                    Eun Tae Won, Samsung
Nov 2007                                                                        doc.: IEEE 802.15-07/0911r0

  New Idea for the Communication?

                                               Health
                                                                  Power
                  Regulation                                   consumption
                                                                                    Price
                                       Eye safety
                                                                     Mobility
       Security                                                                     Convenience
                            Invisibility            High Speed

             Invisibility                                                                   Low price
             Multimedia                                                            Human body safe
             Eavesdropping                                                      Eye safety regulation
             Frequency restriction                  Ease to use           Low power consumption
                                               Using it everywhere


                                   There is a large range of
                               new opinion on these consideration.
Submission                                           Slide 5                                Eun Tae Won, Samsung
Nov 2007                                                                          doc.: IEEE 802.15-07/0911r0

 Introduce of Visible Light Communication
             •         High speed communication using Visible Light from the LED

  Bandwidth
   Security




                                                           Video
       1nm
                 UV




                                           Da
                                             ta
     380nm                                                                  sic
                                                                          Mu
             visible




                                          Video,
                                          Sound                            Da
                                                                             ta
     780nm
                 IR




                                                                     me
                                                     ta


     100μm
                                                   Da




       3cm                                                         Ga
                 RF




        1m



   Coverage
    Mobility                        Visible Light Communication
Submission                                           Slide 6                                Eun Tae Won, Samsung
Nov 2007                                                      doc.: IEEE 802.15-07/0911r0

 Introduce of Visible Light Communication
   Visible Light Communication is one of the newest
   communication technology using "Visible Light".


         Visibility : Aesthetically pleasing environment

         Security : What You See Is What You Send.

         Health : Harmless for human body and electronic devices

         Unregulated : no room to use more radio frequency

         Using inside the aircraft, spaceship, hospital, etc…

         Eye safety : regulation




Submission                                 Slide 7                      Eun Tae Won, Samsung
Nov 2007                                                     doc.: IEEE 802.15-07/0911r0

 Application Scenario of VLC
                 •   Private information
                 •   information-oriented society
                          While some welcome, other fear.
  Peripheral
    Private               Violate personal information
   Interface
  Information             Protect the privacy right.

                 •   Data can be confirmed by your eye



                 •   Public Information
                 •   information-oriented society, Deluge of information
  Information    •   You can choose the information
     Public
   Broadcast
   Information
                         Your Needs & Your Will
                         Whenever, wherever, whatever you want.



Submission                              Slide 8                        Eun Tae Won, Samsung
    Nov 2007                                                 doc.: IEEE 802.15-07/0911r0

 Application Scenario of VLC
•   Mobile to
    Mobile
•   Mobile to        USB dongle
                                  elgnod BSU



    Multimedia
•   Keyless door
    entry                                                                       Peripheral
•   ID check                                                                      Interface
•   E-payment




•    Sign Board
                                                          se

•    E-book                                          Ch
                                                       ine




                                                                     h
                                                                 n




                                                                     Englis
                                                                a
                                                             re
                                                         Ko


•    ITS
•    Airplane                         SAMSUNG
                                                                                 Information
•    Museum
•    Product Info.                                                                Broadcast




    Submission                             Slide 9                            Eun Tae Won, Samsung
    Nov 2007                                                   doc.: IEEE 802.15-07/0911r0

 Peripheral Interface of VLC
•   Peripheral Interface




                                                                                 Video
         For the portable mobile device.                          Da
                                                                    ta
                                                                                                  sic
                                                                                                Mu
         Can transmit/receive the digital data using the
         visible light.                                          Video,
                                                                 Sound                           Dat
                                                                                                    a


         visible TX in a USB dongle, PDA and etc.




                                                                                           me
                                                                             a
                                                                           at




                                                                                         Ga
                                                                          D
•   Visible Light Communication visualizes the
    communication pathway.

•   Feasibility of Peripheral Interface.
     – Coverage, Distance & Ambient light effect.

•   Multi-color features at higher speeds will expand its
    market potential.




    Submission                                      Slide 10                     Eun Tae Won, Samsung
Nov 2007                                                       doc.: IEEE 802.15-07/0911r0

 Basic Experimental Setup

                           Distance



             TX     TX lens                               RX lens               RX
                                                             lens
             LED                                                          Silicon PD
                                                                           PIN PD
                                             free
                                            space
                                                                          TIA



                                                    Coverage

                                         Error
                                        Detector               detected
                                                                data
                                         Pattern
                   data pattern         Generator




Submission                            Slide 11                              Eun Tae Won, Samsung
  Nov 2007                         doc.: IEEE 802.15-07/0911r0

 Feasibility Test (PDA-PC/PC-PC visible link)




  Submission           Slide 12              Eun Tae Won, Samsung
    Nov 2007                                                                doc.: IEEE 802.15-07/0911r0

 Information Broadcasting of VLC
•     Information Broadcasting system
           Normal function as indication and illumination devices
           Can be used as communication devices for transmitting &
           broadcasting digital information.
           Message Board
           E-book
           Sign Board
           ITS (intelligent Transport System)


•    Feasibility of Information Broadcasting system - based
     on signboard.
      – Using 4 LED array modules


                                           ★
•     Distance and Coverage of
      Transmission - might be
      improved as all of RGB LEDs
      could be modulated.


                                           Picture source: ★ LED Magazine
    Submission                                    Slide 13                            Eun Tae Won, Samsung
Nov 2007                                                             doc.: IEEE 802.15-07/0911r0

 Experimental setup (with, w/o ambient)
                            1 module
                                                                ~ 50,000 Lux
                         1 module
                      1 module                                  (Outdoor environment)
                    1 module


                                                                                       RX
              driver
                                                                         lens
                          …
                          …
                          …

              driver                                     free                    PIN PD
                                                        space
                               …
                               …
                               …
               …
               …




                                                                sensor           TIA
              driver
             32 drivers
                                      …
                                      …
                                      …


                                                                         Power
                              8 red                                      Meter
                              leds

                sign board (4 modules)


                                                   Error
                                                                                 detected
                                                  Detector
                                                                                   data
                                                   Pattern               clock
                              data pattern        Generator


Submission                                   Slide 14                            Eun Tae Won, Samsung
Nov 2007                                            doc.: IEEE 802.15-07/0911r0

   Feasibility Test (visible signboard)
        1 module                            4 modules
              …              …              …           …               …
38 cm




                         …



                                 …



                                                …



                                                             …
        …




                                 …



                                                …



                                                             …



                                                                              …
                     …
              …              …              …           …               …
             38 cm



• Red LED : 16 x 16

• Green LED : 16 x 16




Submission                       Slide 15                     Eun Tae Won, Samsung
    Nov 2007                                                                doc.: IEEE 802.15-07/0911r0

     Network Access
•     PLC (Power Line Communication) : other application scenario
       – A kind of communication system using electric power lines


                                                    Power line              Lamp


                                                            PLC Modem
                                Electrical Signal




                 Power line
                              PLC Modem



                      Power line communication                              Visible light




    Submission                                                   Slide 16                   Eun Tae Won, Samsung
                      Nov 2007                                                                                               doc.: IEEE 802.15-07/0911r0

                  LED as a Light Source
          • Light-Emitting Diode (LED) :
                                – A semiconductor diode that emits incoherent light when electrically biased.
                                – energy-saving / more efficient            – faster response times.
                                – difficult to damage with external shock   – small

  •                         LED market growth :


                                                                               [ Visible LED Application ]
                     7000                                                           Automotive
Revenue($ Million)




                     6000
                                                                                    Elctronic Equipmant/other
                     5000
                     4000
                                                                                    Traffic Signal
                     3000                                                           Illumination
                     2000                                                           Signs/Displays
                     1000
                                                                                    Mobile Appliances
                        0
                             2004    2005   2006          2007   2008   2009
                                                   Year

                                    Visible LED Market Forecast                                                 Growth in the high brightness LED Market

                                    Source : Strategies Unlimited 2005                                              Source : LED Magazine March 2007
                      Submission                                                                     Slide 17                          Eun Tae Won, Samsung
   Nov 2007                                                         doc.: IEEE 802.15-07/0911r0

 Technical Fields to be discussed
                                                          Considering Factor

                                     • Centralized network between AP and VL device.
• Network Topology
                                     • Distributed network between VL devices

                                     • Initial network entry
• To establish visible light link    • Channel access
                                     • Media access control

                                     • IM (Intensity Modulation)
• Modulation
                                     • Sub-carrier

                                     • Efficient resource allocation to different connections
• Resource management (RM) and QoS
                                     • Reuse of resources
                                     • Sleep/Idle modes for power saving
                                     • Indicate arrival of packets to nodes in power save mode
• Power saving/power control         • Buffer management for devices in power save mode
                                     • Power control for battery management and bandwidth
                                     management

• Mobility (micro mobility)          • when the RX moving


   Submission                             Slide 18                             Eun Tae Won, Samsung
Nov 2007                                                    doc.: IEEE 802.15-07/0911r0

   Technical Issues




               Ambient Light                             Eye Safety




      Relatively Low Responsivity of PD              Network Access Plan

Submission                                Slide 19                    Eun Tae Won, Samsung
Nov 2007                                                            doc.: IEEE 802.15-07/0911r0


 Conclusion – Look What’s Coming
       Introduce VLC as a new communication

       Application scenario using VLC

       Define 2 type of information.
             Peripheral Interface

             Information Broadcasting

             Feasibility Test

       Other side
             Light source (LED), Network access (PLC application)

       Technical Field to be discussed

       Technical Issues

Submission                                  Slide 20                          Eun Tae Won, Samsung
Nov 2007                                    doc.: IEEE 802.15-07/0911r0


                 Other Interested Parties

             SIEMEMS

             France Telecom

             Oxford University

             ETRI

             VLCC




Submission                       Slide 21             Eun Tae Won, Samsung
Nov 2007                     doc.: IEEE 802.15-07/0911r0




                END

             THANK YOU !




Submission        Slide 22             Eun Tae Won, Samsung

				
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