Visible light beacon system for multimedia applications

IEC 62943:2017 aims at establishing a unified standard concerning the lower communication layer common to multimedia applications, and does not deal with the upper communication layer which depends upon individual applications. This document specifies a unidirectional visible light communication protocol using visible light, named "visible light beacon system for multimedia applications".

Système de balise de lumière visible pour applications multimédias

L'IEC 62943:2017 vise à l'établissement d'une norme unifiée concernant la couche inférieure de communication commune aux applications multimédias et ne traite pas de la couche supérieure de communication qui dépend des applications individuelles. Le présent document spécifie un protocole de communication unidirectionnelle par lumière visible qui utilise la lumière visible, nommé "système de balise de lumière visible pour applications multimédias".

General Information

Status
Published
Publication Date
06-Mar-2017
Current Stage
PPUB - Publication issued
Start Date
07-Mar-2017
Completion Date
07-Mar-2017
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IEC 62943
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Visible light beacon system for multimedia applications
Système de balise de lumière visible pour applications multimédias
IEC 62943:2017-03(en-fr)
---------------------- Page: 1 ----------------------
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IEC 62943
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Visible light beacon system for multimedia applications
Système de balise de lumière visible pour applications multimédias
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ISBN 978-2-8322-4016-8
ICS 33.160.60; 35.100.10

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62943:2017  IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 System outline ................................................................................................................. 7

4.1 Interface points and protocol rules .......................................................................... 7

4.2 Functions ................................................................................................................ 9

5 Physical layer .................................................................................................................. 9

5.1 Wavelength ............................................................................................................. 9

5.2 Data rate ................................................................................................................. 9

5.3 Data transmission system ....................................................................................... 9

5.4 Spurious ............................................................................................................... 10

6 Frame layer ................................................................................................................... 10

6.1 Single frame transmission ..................................................................................... 10

6.1.1 Frame structure ............................................................................................. 10

6.1.2 Preamble (PRE)............................................................................................. 10

6.1.3 ID length (IDLEN) .......................................................................................... 11

6.1.4 ID type (IDTYPE) ........................................................................................... 11

6.1.5 CRC .............................................................................................................. 11

6.2 Multiple frames transmission ................................................................................. 11

6.2.1 Frame structure ............................................................................................. 11

6.2.2 Preamble (PRE)............................................................................................. 12

6.2.3 Sequence number (SEQNO) .......................................................................... 13

6.2.4 Partition type (PTYPE) ................................................................................... 13

6.2.5 BODY ............................................................................................................ 14

6.2.6 CRC .............................................................................................................. 14

6.3 Idle pattern ........................................................................................................... 15

7 Measurement method .................................................................................................... 15

Annex A (normative) Code management concerning frame type, ID and DATA .................... 16

Annex B (informative) Background, application examples, and safety .................................. 17

B.1 General ................................................................................................................. 17

B.2 Background of this standard .................................................................................. 17

B.3 Application examples ............................................................................................ 17

B.3.1 General ......................................................................................................... 17

B.3.2 Multimedia applications utilizing positional information .................................. 17

B.3.3 Application in public spaces ........................................................................... 17

B.3.4 Cooperation with other services ..................................................................... 18

B.3.5 Application to setting of equipment ................................................................ 18

B.3.6 Application to AV and multimedia devices ...................................................... 18

B.3.7 Application to entertainment .......................................................................... 18

B.4 Safety ................................................................................................................... 18

Annex C (informative) Purpose, justification, possible applications, and installation

examples .............................................................................................................................. 19

C.1 Purpose ................................................................................................................ 19

C.2 Justification .......................................................................................................... 19

C.3 Possible applications ............................................................................................ 19

---------------------- Page: 4 ----------------------
IEC 62943:2017  IEC 2017 – 3 –

C.3.1 Genereal ....................................................................................................... 19

C.3.2 Visible light beacon system for multimedia devices receiving location-

dependent advertisement multimedia information from digital signage ........... 19

C.3.3 Visible light beacon system for guiding and navigation system....................... 20

C.3.4 Visible light beacon system for multimedia devices receiving multimedia

information from a TV backlight ..................................................................... 20

C.4 Installation examples ............................................................................................ 21

C.4.1 General ......................................................................................................... 21

C.4.2 Visible light beacon system for indoor navigation for the visually

impaired (february 2012) ............................................................................... 21

C.4.3 Visible light beacon system for indoor smartphone users (april 2013) ............ 21

Bibliography .......................................................................................................................... 23

Figure 1 – Visible light beacon system for multimedia applications.......................................... 7

Figure 2 – Visible light beacon system for multimedia applications: structure and

interface point ......................................................................................................................... 8

Figure 3 – I-4PPM signal waveform ......................................................................................... 9

Figure 4 – I-4PPM Slot and Symbol ...................................................................................... 10

Figure 5 – Frame structure for single frame transmission ...................................................... 10

Figure 6 – Preamble for single frame transmission ................................................................ 11

Figure 7 – Frame structure for a multiple frames transmission .............................................. 12

Figure 8 – Body field in Single frame compatible mode ......................................................... 14

Figure C.1 – Visible light beacon system for multimedia devices receiving location-

dependent advertisement multimedia information from digital signage .................................. 19

Figure C.2 – Visible light beacon system for guiding and navigation system .......................... 20

Figure C.3 – Visible light beacon system for multimedia devices receiving multimedia

information from a TV backlight ............................................................................................ 20

Figure C.4 – Visible light beacon system for indoor navigation for the visually impaired ........ 21

Figure C.5 – Visible light beacon system for indoor smartphone users .................................. 22

Table 1 – ID length ............................................................................................................... 11

Table 2 – Length of CRC and generator polynomial .............................................................. 11

Table 3 – Possible length of concatenated data .................................................................... 12

Table 4 – Preambles for multiple frames transmission .......................................................... 13

Table 5 – Sequence number ................................................................................................. 13

Table 6 – Partition type ......................................................................................................... 14

Table 7 – Field composition for each length of ID/DATA in Single frame compatible

mode .................................................................................................................................... 14

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– 4 – IEC 62943:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VISIBLE LIGHT BEACON SYSTEM FOR MULTIMEDIA APPLICATIONS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC

Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

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6) All users should ensure that they have the latest edition of this publication.

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62943 has been prepared by IEC technical committee 100: Audio,

video and multimedia systems and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
100/2850/FDIS 100/2857/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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IEC 62943:2017  IEC 2017 – 5 –

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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– 6 – IEC 62943:2017  IEC 2017
VISIBLE LIGHT BEACON SYSTEM FOR MULTIMEDIA APPLICATIONS
1 Scope

This International Standard aims at establishing a unified standard concerning the lower

communication layer common to multimedia applications, and does not deal with the upper

communication layer which depends upon individual applications.

This document specifies a unidirectional visible light communication protocol using visible

light, named "visible light beacon system for multimedia applications". This document does

not specify the type of receivers. Dimming can be done by such methods as pulse width

control or amplitude control, but the dimming is out of the scope of this document.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
visible light beacon transmitter

transmitter utilizing visible light beacon of visible light transmission standard

3.2
visible light beacon receiver
receiver utilizing visible light beacon of visible light transmission standard
3.3
visible light beacon system
unidirectional beacon system utilizing visible light as its carrier
3.4
ID resolution
resolution of information related to the ID
3.5
ID resolution server
server capable of ID resolution from inquired ID
---------------------- Page: 8 ----------------------
IEC 62943:2017  IEC 2017 – 7 –
3.6
carrier

signal consisting of a visible light in the case of visible light communication for transmission of

information through (wired or wireless) communication media
3.7
modulation

processing and transforming of a carrier according to information in order to enable the

information to be transmitted efficiently and correctly through communication media

3.8
frame
assembly of information continued for a certain length of time
3.9
preamble

signal to inform reception side about preparation and time position of start of the frame

3.10
communication protocol
set of rules decided for mutual communication between transmitters and receivers
3.11
encode

adapting the transmitted data array to be consistent with the transmission protocol

4 System outline
4.1 Interface points and protocol rules

The IF-a (interface point a) part in the visible light beacon system in Figure 1 shall be used.

Visible light
beacon
transmitter
IF-a
Visible light
beacon receiver
IEC
Figure 1 – Visible light beacon system for multimedia applications

Figures 2 a), b), c) and d) represent interface standard points between system structure

figures and element systems of visible light beacon system for multimedia applications.

• Figure 2 a) is the whole structure (standard structure) of most common visible light beacon

system for multimedia applications. The visible light beacon receiver sends the beacon

received from a visible light beacon transmitter to an ID resolution server, obtains the

address of the information providing server where target information exists, and obtains

the target information from the information providing server using the address.
---------------------- Page: 9 ----------------------
– 8 – IEC 62943:2017  IEC 2017

• Figure 2 b) is the system structure (degeneracy system structure 1) for obtaining target

information by implementing ID resolution in the beacon receiver, referring to ID resolution

table incorporated in the visible light beacon receiver, and directly accessing the

information providing server based on the result.

• Figure 2 c) is the system structure (degeneracy system structure 2) for preliminarily

caching target information, in addition to ID resolution table, in the visible light beacon

receiver, and directly indicating the selected target information based on the received

beacon.

• Figure 2 d) is the system structure (direct information delivery structure) for the visible

light beacon receiver to directly receive delivery of target information itself from visible

light beacon transmitter.
The interface point a common to Figure 2 a) to 2 d) shall be used.
Visible light Visible light
beacon beacon
transmitter transmitter
IF-b
resolution
server
IF-a IF-a
URL
URL
Information Information
Visible light
Visible light
providing providing
beacon receiver
beacon receiver
server server
Information
Information
IF-c
IF-c
IEC
IEC
a) Standard structure b) Degeneracy system structure 1
Visible light Visible light
beacon beacon
transmitter transmitter
IF-a
IF-a
Visible light Visible light
Cache
beacon
beacon within
receiver
receiver
receiver
IEC
IEC
c) Degeneracy system structure 2 d) Direct information delivery structure
Figure 2 – Visible light beacon system for multimedia applications:
structure and interface point

All the system structures above assume that there is one visible light beacon transmitter. If

there are multiple light sources and the visible light beacon receiver receives signals from

multiple light sources at the same time, it can cause interference. The interference problem

can be solved by aligning the optics of a transmitter and a receiver. However, the alignment is

outside the scope of this document.
---------------------- Page: 10 ----------------------
IEC 62943:2017  IEC 2017 – 9 –
4.2 Functions

The visible light beacon transmitter can transmit information. The transmitted information can

be either arbitrary data or an ID code. The ID code system used is selectable, and various

services can be provided or enjoyed through ID resolution (drawing information related to ID).

5 Physical layer
5.1 Wavelength

The wavelength of the system optical output shall be in the visible range with peak

wavelength from 380 nm to 780 nm.
5.2 Data rate
Data rate shall be 4,8 kb/s with tolerance of ±0,5 %.
5.3 Data transmission system

The transmission system for modulation of visible light should use Inverted 4PPM encoding.

Such a modulation method is called I-4PPM (Inverted 4PPM). Figure 3 shows I-4PPM signal

waveform. Although the signal is represented by square wave, actually waveform shaping is

required to comply with spurious rules as individual electronic instruments. The same applies

to Figure 4.

The bit ordering of the transmitted data after preamble is LSB (least significant bit) first,

meaning that the least significant bit is transmitted first.
Transmission order: last
Transmission order: first
Data 0(LSB) 0 0 1 1 0 1 1
4PPM signal
1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1
Bright
Dark
IEC
Figure 3 – I-4PPM signal waveform

With waveform intensities a and b shown in Figure 3, signal amplitude and modulation index

are defined as below.
signal amplitude = b – a
modulation index = (b – a)/b

The 4PPM encoding system distributes evenly a specific length of time defined as symbol

time (D ) to 4 slots (C ), it converts a pulse of 1 slot width in 1 symbol time, and transmits

1 1

information of 2 bits assigned to existing slot time position of the pulse. Encoding rule of slot

time position are illustrated in Figure 4. For example:
Symbol time D = 2 × (1/4 800) = 0,416 ms
Slot time C = D / 4 = 0,104 ms
1 1
---------------------- Page: 11 ----------------------
– 10 – IEC 62943:2017  IEC 2017
Data 0 (LSB) 0 0 1 1 0 1 1
I-4PPM signal 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1
Slot
(C1)
2 bit = 1 symbol = 4 slot
Symbol (D1)
IEC
Figure 4 – I-4PPM Slot and Symbol
5.4 Spurious

The details of this item are defined in each application standard. For example, visible light

beacon transmitters using LED lighting systems should be defined in electrical spurious

standard for lighting equipment.
6 Frame layer
6.1 Single frame transmission
6.1.1 Frame structure

Figure 5 shows a frame structure for a single frame transmission. The frame consists of

preamble (PRE), ID length (IDLEN), ID type (IDTYPE), ID and/or data (ID/DATA), and cyclic

redundancy code (CRC) fields.
PRE IDLEN IDTYPE ID / DATA CRC
6 bit 3 bit 5 bit variable length variable length
Start of frame Body End of frame
IEC
Figure 5 – Frame structure for single frame transmission
6.1.2 Preamble (PRE)

The pattern of "1" in three sequential slots followed by nine "0" slots, which does not occur by

I-4PPM encode of data, is set as a preamble for single frame transmission as shown in

Figure 6.
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...

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