ISO/IEC 17982:2012

INTERNATIONAL ISO/IEC
STANDARD 17982
First edition
2012-08-01
Information technology —
Telecommunications and information
exchange between systems — Close
Capacitive Coupling Communication
Physical Layer (CCCC PHY)
Technologies de l'information — Téléinformatique — Couche physique
pour communication par couplage capacitif fermé

Reference number
©
ISO/IEC 2012
©  ISO/IEC 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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Published in Switzerland
ii © ISO/IEC 2012 – All rights reserved

Contents Page
Foreword . v
Introduction . vi
1  Scope . 1
2  Conformance . 1
3  Normative references . 1
4  Terms, definitions and acronyms . 1
5  Conventions and notations . 2
5.1  Representation of numbers . 2
5.2  Names . 2
6  General . 2
7  Reference plate-electrode assembly . 4
8  PHY parameters . 5
8.1  Voltage conditions . 5
8.2  Bit representation . 6
8.2.1  Bit duration . 6
8.2.2  Bit encoding . 6
8.3  Transmission . 6
8.4  DC balance of a P-PDU . 6
8.5  Reception of a P-PDU . 7
9  P-PDU . 7
9.1  Structure . 7
9.2  Space . 7
9.3  Level adjust . 7
9.4  Pre-amble and Sync . 7
9.5  Attribute . 8
9.6  TDS number . 8
9.7  Sequence number . 9
9.7.1  Initial and range . 9
9.7.2  Acknowledgement . 9
9.8  Payload . 9
9.9  CRC . 9
9.10  Post-amble . 9
9.11  Null P-PDU . 9
9.12  Data P-PDU . 9
10  PHY Data Unit (P-DU) . 9
11  Segmentation and Reassembly . 10
12  TDS . 10
13  LBT and synchronisation . 11
13.1  LBT . 11
13.2  Synchronisation . 11
14  Association procedure. 11
© ISO/IEC 2012 – All rights reserved iii

15  Communication .13
15.1  Full duplex communication .13
15.2  Broadcast communication .15
Annex A (normative) Tests .17

iv © ISO/IEC 2012 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 17982 was prepared by Ecma International (as ECMA-401) and was adopted, under a special “fast-
track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its
approval by national bodies of ISO and IEC.
© ISO/IEC 2012 – All rights reserved v

Introduction
This International Standard specifies the PHY protocol and for wireless communication between the Close
Capacitive Coupling Communication (CCCC) devices.

vi © ISO/IEC 2012 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 17982:2012(E)

Information technology — Telecommunications and information
exchange between systems — Close Capacitive Coupling
Communication Physical Layer (CCCC PHY)
1 Scope
This International Standard specifies the CCCC PHY for Full duplex and Broadcast communication in time
slots on frequency division multiplex channels.
2 Conformance
Conforming entities implement:
 both Talker and Listener,
 listen before talk (LBT) for both Talker and Listener,
 the capability to execute association on FDC2 and to communicate on (FDC0 and FDC1), (FDC3 and
FDC4), or (FDC0, FDC1, FDC3 and FDC4),
 the capability for Talkers and Listeners to use any of the 8 TDS on a FDC,
 both Full duplex and Broadcast communication, and pass the tests in Annex A as specified herein.
3 Normative references
The following referenced documents are indispensable for the application 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.
ISO/IEC 7498-1:1994, Information technology — Open Systems Interconnection — Basic Reference Model:
The Basic Model
ITU-T V.41, Data communication over the telephone network — Code-independent error-control system
4 Terms, definitions and acronyms
For the purposes of this document, the following terms and definitions apply, in addition to those defined in
ISO/IEC 7498-1:1994.
CRC Cyclic Redundancy Check
D Divisor
DUT Device Under Test
FDC Frequency Division Channel
© ISO/IEC 2012 – All rights reserved 1

LBT Listen Before Talk
LEN Length
Listener entity that does not initiate communication
P-DU PHY Data Unit
P-PDU PHY PDU
PHY Physical layer
RFU Reserved for Future Use
TDS Time Division Slot
Talker entity that initiates communication
5 Conventions and notations
5.1 Representation of numbers
The following conventions and notations apply in this document.
- A sequence of characters of ‘A’, ‘B’, ‘C”, ‘D, ‘E’ or ‘F’ and decimal digits in parentheses represent numbers
in hexadecimal notation unless followed by a ‘b’ character see next.
- Numbers in binary notation and bit patterns are represented by a sequence of 0 and 1 digits or ‘X’
characters in parentheses followed by a ‘b’ character, e.g. (0X11X010)b. Where X indicates that the
setting of a bit is not specified, and the leftmost bit is the most significant bit unless the sequence is a bit
pattern.
5.2 Names
The names of basic elements, e.g. specific fields, are written with a capital initial letter.
6 General
The protocol architecture of CCCC follows ISO/IEC 7498-1 as the basic model. CCCC devices communicate
through mediators, such as conductive and dielectric materials.
Plate-electrodes for CCCC device E and F are equivalent to the reference plate-electrode assembly.
The plate-electrode A faces to the imaginary point at infinity and the plate-electrode B faces to the mediator.
The plate-electrode C faces to the mediator and the plate-electrode D faces to the imaginary point at infinity.
See Figure 1.
Figure 2 is the equivalent circuit of Figure 1. The voltage of X is the potential of the point at infinity. The
voltage of Y is the potential of the point at infinity. It is deemed that the potential of X and Y is identical.
Therefore, X and Y is imaginary short. Consequently, device E and F is able to send and receive signal.
Regarding the information transfers from CCCC device E to F, the device E changes the voltage between
plate-electrode A and B. It changes the electric charge between plate-electrode B and the mediator. The
change in electric charge affects the device F by the capacitive coupling between plate-electrode C and
mediator. Plate-electrodes A and B and plate-electrodes C and D have potential differences of reverse
polarity; therefore device F senses the information as changes in voltage between plate-electrode C and D.
2 © ISO/IEC 2012 – All rights reserved

Plate-Electrode B
Plate-Electrode C
point at infinity
Electrostatic Electrostatic
Capacity Capacity
Mediator
Conductive
materials
point at infinity
or
point at infinity
Dielectric
materials
Plate-Electrode D
Closed Capacitive Closed Capacitive
Plate-Electrode A Coupling Com munication Co
...