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BS ISO/IEC 14543-3-10:2020

BS ISO/IEC 14543-3-10:2020

$167.15

Information technology. Home electronic system (HES) architecture – Amplitude modulated wireless short-packet (AMWSP) protocol optimized for energy harvesting. Architecture and lower layer protocols

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BSI 2020 38
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This part of ISO/IEC 14543 specifies a wireless protocol for low-powered devices such as energy harvesting devices in a home environment. This wireless protocol is specifically designed to keep the energy consumption of such sensors and switches extremely low.

The design is characterized by

  • keeping the communications very short, infrequent and mostly unidirectional, and

  • using communication frequencies that provide a good range even at low transmit power and avoid collisions from disturbers.

This allows the use of small and low-cost energy harvesting devices that can compete with similar battery-powered devices. The messages sent by energy harvesting devices are received and processed mainly by line-powered devices such as relay switch actuators, repeaters or gateways. Together these form part of a home automation system, which, when conforming to ISO/IEC 14543 (all parts), is defined as a home electronic system.

This document specifies OSI Layers 1 to 3 of the amplitude modulated wireless short-packet (AMWSP) protocols.

The AMWSP protocol system consists of two and optionally three types of components that are specified in this document. These are the transmitter, the receiver and optionally the repeater. Repeaters are needed when the transmitter and the receiver are located in such a way that no good direct communication between them can be established.

Protection against malicious attacks is handled in the upper layers and thus not treated in this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
10 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
15 3.2 Abbreviated terms
4 Conformance
5 Architecture
5.1 Generic protocol description
5.1.1 Overview
16 5.1.2 Physical layer
5.1.3 Data link layer
5.1.4 Network layer
Tables
Table 1 – AMWSP protocol stack structure (OSI)
17 5.1.5 Transport layer
5.1.6 Session layer
5.1.7 Presentation layer
5.1.8 Application layer
5.2 Data unit description
Figures
Figure 1 – Structure of a subtelegram
18 6 Layer 1 – Physical layer
6.1 Overview
6.2 General description
19 Figure 2 – Illustration of an ASK envelope and various physical parameters
20 6.3 Requirements for the 315 MHz AMWSP protocol
21 Table 2 – Transmitter requirements for the 315 MHz AMWSP protocol
22 Table 3 – Receiver requirements for the 315 MHz AMWSP protocol
Table 4 – Minimum required link budget for the 315 MHz AMWSP protocol
23 6.4 Requirements for the 868,3 MHz AMWSP protocol
Table 5 – Maximum RX power for the 315 MHz AMWSP protocol
Table 6 – Transmitter requirements for the 868,3 MHz AMWSP protocol
24 Table 7 – Receiver requirements for the 868,3 MHz AMWSP protocol
Table 8 – Minimum required link budget for the 868,3 MHz AMWSP protocol
25 6.5 Frame structure
Figure 3 – Complete frame structure for the 868,3 MHz AMWSP protocol
Table 9 – Maximum RX power for the 868,3 MHz AMWSP protocol
26 Figure 4 – Encoded subframe
Table 10 – Frame definition for the 315 MHz AMWSP protocol
Table 11 – Frame definition for the 868,3 MHz AMWSP protocol
27 7 Layer 2 – Data link layer
7.1 Overview
7.2 Subtelegram timing
Figure 5 – TX maturity time divided into four 10 ms time ranges
Table 12 – Maturity time parameters
28 7.3 Data integrity
7.3.1 General
Table 13 – Allocation of time slots to the different subtelegrams
29 7.3.2 4 bit summation hash function algorithm
7.3.3 8 bit summation hash function algorithm
7.3.4 8 bit cyclic redundancy check (CRC) hash function algorithm
Table 14 – Identification of the hash function used in the telegram
30 7.4 Listen before talk
8 Layer 3 – Network layer
8.1 Overview
8.2 Switch telegram
31 8.3 Repeater
8.3.1 General
8.3.2 Time response for collision avoidance
Figure 6 – Conversion of a switch telegram to a normal telegram
Table 15 – Conversion of the telegram type and STATUS fieldsfrom a switch telegram to a telegram
32 8.3.3 Bits of a repeater level in the STATUS byte
8.4 Addressing
8.4.1 General
Table 16 – STATUS byte with repeater level bits
Table 17 – Repeating bits in STATUS byte
33 8.4.2 Encapsulation
Figure 7 – Example of an encapsulation
34 Annex A (informative)Examples of how to evaluate the hash values
Figure A.1 – Example of a C code program of the 4 bit long summation hash value
Figure A.2 – Example of a C code program of the 8 bit long summation hash value
35 Figure A.3 – Efficient C code program for the evaluationof an 8 bit long CRC type hash value
36 Bibliography

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BS ISO/IEC 14543-3-10:2020
$167.15