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BS EN IEC 62980:2022

BS EN IEC 62980:2022

$189.07

Parasitic communication protocol for radio-frequency wireless power transmission

Published By Publication Date Number of Pages
BSI 2022 50
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This standard defines procedures for transferring power to non-powered IoT devices using the existing ISM band communication infrastructure and RF WPT and a protocol for a two-way, long-distance wireless network in which IoT devices and APs communicate using backscatter modulation of ISM-band signals. Three components are required for two-way, long-distance wireless communication using backscatter modulation of ISM-band signals: an STA that transmits wireless power and data packets to SSNs by forming ISM-band signal channels between HIE-APs, a batteryless SSN that changes the sensitivity of the channel signals received from the STA using backscatter modulation, and an HIE-AP that practically decodes the channel signals whose sensitivity was changed by the SSN. In this standard, the procedures for CW-type RF WPT using communication among these three components are specified based on application of the CSI or RSSI detection method of ISM-band communication. This standard proposes a convergence communication protocol than can deploy sensors, which can operate at low power (dozens of microwatts or less) without batteries, collect energy, and perform communication, to transmit power to SSNs using RF WPT based on parasitic communication. This method can be applied to application service areas such as domestic IoT, the micro-sensor industry, and industries related to environmental monitoring in the future

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
13 3.1 Terms and definitions
3.2 Abbreviated terms
14 4 Overview
Figures
Figure 1 – Usage of RF-WPT
15 5 Communication procedures for RF WPT
5.1 General
Figure 2 – RF-WPT structure of using parasitic Wi-Fi communication technology
16 5.2 Communication procedures for parasitic downlink communication
Figure 3 – Parasitic downlink/uplink communication procedures
17 5.3 Communication procedures for parasitic uplink communication
Figure 4 – Specific parasitic downlink communication procedures
18 5.4 Backscatter downlink/uplink data flow
Figure 5 – Specific parasitic uplink communication procedures
19 5.5 WPT process
Figure 6 – Data flow during parasitic downlink/uplink communication
Figure 7 – RF WPT access procedures
20 6 Physical layer
6.1 Modulation/coding method
6.1.1 General
6.1.2 Downlink modulation method
Figure 8 – RF WPT control protocol
21 6.1.3 Uplink modulation method
6.1.4 Downlink coding method
Figure 9 – PIE method packet configuration
Figure 10 – Modulation and coding of the downlink preamble
22 6.1.5 Uplink coding method
6.2 Frame structure
6.2.1 General
6.2.2 Downlink frame structure
Figure 11 – Modulation and coding of the downlink preamble
Figure 12 – Modulation and coding of the uplink preamble
Figure 13 – Modulation and coding of the uplink payload
23 Figure 14 – Physical layer structure of the downlink frame
Tables
Table 1 – Downlink preamble structure
Table 2 – Downlink payload structure
24 6.2.3 Uplink frame structure
Figure 15 – Physical layer structure of the uplink frame
Table 3 – Downlink frame check CRC
Table 4 – Uplink preamble structure
25 7 Datalink layer
7.1 Message definition
7.1.1 General
Table 5 – Uplink frame detection field structure
Table 6 – Downlink payload structure
26 Figure 16 – Model of command transmission between the STA and SSN
Figure 17 – Diagram of sequential command transmission between the STA and SSN
27 Table 7 – CMD list
Table 8 – Responses for each CMD
28 7.1.2 Select step
Figure 18 – SSN memory structure
29 Figure 19 – Message exchange in the select step
Table 9 – Select CMD
30 7.1.3 Inventory step
Figure 20 – CRC-16 circuit example
Table 10 – Valid response
31 Figure 21 – Message exchange method of the inventory step
Table 11 – Query CMD field
32 Table 12 – QueryRep CMD field
Table 13 – QueryAdj CMD field
Table 14 – Valid_Query response field
33 7.1.4 Access step
Table 15 – Ack CMD field
Table 16 – Valid_Ack response field list
34 Table 17 – Read CMD field
Table 18 – Data field of the response to the read command
Table 19 – Write CMD field
Table 20 – Data field of the response to the write command
35 7.2 Data encoding
7.2.1 General
7.2.2 FM0 encoding
Figure 22 – Basic functions for FM0 encoding
Figure 23 – State diagram for FM0 encoding generation
36 7.2.3 Miller encoding
Figure 24 – Basic functions for Miller encoding
Figure 25 – State diagram for FM0 encoding generation
37 8 RF WPT control protocol
8.1 Wireless charging architecture
8.1.1 General
Figure 26 – Encoding theory combining basic Miller functions
38 8.1.2 Power control purpose of RF WPT
8.1.3 HIE-AP operation control
Figure 27 – Basic configuration of the RF wireless charging network of the proposed standard
39 8.1.4 SSN operation control
Figure 28 – HIE-AP operation in RF WPT in the proposed standard
Figure 29 – SSN operation in RF WPT in the proposed standard
40 8.2 RF WPT process
8.2.1 General
Figure 30 – Operating range of the rectified battery voltage
41 8.2.2 General WPT management
Figure 31 – RF WPT information acquisition and control protocol of the proposed standard
Table 21 – WPT CMD field
42 8.2.3 SSN control
Table 22 – WPT sub-CMD list
Table 23 – SSN control field
Table 24 – Detailed WPT field description
43 8.2.4 SSN static parameter
Table 25 – Response to the SSN control CMD
Table 26 – SSN static parameter field
Table 27 – Rectifier maximum power field
Table 28 – Rectifier minimum constant voltage
Table 29 – Rectifier maximum constant voltage
44 8.2.5 SSN dynamic parameter
Table 30 – Rectifier minimum constant voltage
Table 31 – SSN dynamic parameter field
Table 32 – Rectifier dynamic voltage field
Table 33 – Rectifier dynamic current field
Table 34 – Output dynamic voltage of the battery terminal
45 Table 35 – Output dynamic current of the battery terminal
Table 36 – Battery temperature of the SSN
Table 37 – SSN critical state field
Table 38 – Rectifier desired minimum voltage
46 Annex A (informative)Regulation and certification
47 Bibliography

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BS EN IEC 62980:2022
$189.07