ISO IEC 17982 pdf – Information technology — Telecommunications and information exchange between systems — Close capacitive coupling communication physical layer (CCCC PHY)
1 Scope
This document specifies the close capacitive coupling communication physical layer(CCCC PHY) for fullduplex and broadcast communication in time slots on frequency division multiplex channels.
NOTE An implementation for small size and low power devices is provided in Annex B.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO/IEC 7498-1, Information technology — Open Systems Interconnection — Basic Reference Model: TheBasic Model
ITU-T Rec. V.41,Data communication over the telephone network — Code-independent error-controlsystem
3 Terms, definitions and abbreviated terms3.1Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 7498-1 and the followingapply.
lS0 and IEC maintain terminological databases for use in standardization at the following addresses:- ISO online browsing platform: available at https://www.iso .org/obp
—IEC Electropedia: available at http://www.electropedia .org/
3.1.1
listener
entity that does not initiate communication3.1.2
talker
entity that initiates communication3.2Abbreviated terms
CRC
cyclic redundancy check
cccc
close capacitive coupling communication
DUT
device under test
LBT
listen before talk
LEN
length
P-DU
PHY data unit
P-PDU
PHY PDU
PHY
physical layer
RFU
reserved for future use
TDS
time division slot
4 Conventions and notations
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.
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.(OX11X010)b. Where X indicates that thesetting of a bit is not specified, and the leftmost bit is the most significant bit unless the sequence isa bit pattern.
5 Conformance
Conforming entities implement:一 both talker and listener;
listen before talk (LBT) for both talker and listener;
the capability to execute association on FDC2 and to communicate on (FDCO and FDC1),(FDC3 andFDC4), or (FDCO, FDC1, FDC3 and FDC4);
– the capability for talkers and listeners to use any of the 8 TDS on an FDC;
一 both full duplex and broadcast communication, and pass the tests specified in Annex A.
6 Architecture
The protocol architecture ofCCCC follows ISO/IEC7498-1as the basic model.cCCCdevices communicatethrough mediators, such as conductive and dielectric materials.
Plate-electrodes for cccc device E and F are equivalent to the reference plate-electrode assembly.Theplate-electrode A faces to the imaginary point at infinity and the plate-electrode B faces to themediator. The plate-electrode C faces to the mediator and the plate-electrode D faces to the imaginarypoint at infinity.See Figure 1.
Pigure 2 is the equivalent circuit of Figure 1.The voltage of X is the potential of the point at infinity.Thevoltage of Y is the potential of the point at infinity.Ilt is deemed that the potential of X and Y is identical.Therefore, X and Y is imaginary short.Consequently, devices E and F are able to send and receive signal.Regarding the information transfers from cccC devices E to F, device E changes the voltage betweenplate-electrode A and B. It changes the electric charge between plate-electrode B and the mediator.