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eLibrary > BS EN 13757-4:2025 Communication systems for meters - Wireless M-Bus communication >

BS EN 13757-4:2025 Communication systems for meters - Wireless M-Bus communication, 2025

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BS EN 13757-4:2025 Communication systems for meters - Wireless M-Bus communication, 2025

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European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms [Go to Page]
4.1 Symbols
4.2 Abbreviated terms
5 General [Go to Page]
5.1 Modes of operation
5.2 Meter communication types
Table 1 — Meter communication types [Go to Page]
5.3 Performance classes
Table 2 — Transmitter performance classes
Table 3 — Receiver performance classes
6 Mode S [Go to Page]
6.1 Channel properties
Table 4 — Mode S, Channel properties [Go to Page]
6.2 Transmitter
Table 5 — Mode S, Transmitter [Go to Page]
6.3 Receiver
Table 6 — Mode S, Receiver [Go to Page]
6.4 Data encoding and preamble [Go to Page]
6.4.1 Data encoding
6.4.2 Order of transmission of the encoded data
6.4.3 Preamble and synchronization pattern
7 Mode T [Go to Page]
7.1 Channel properties
Table 7 — Mode T, Channel properties [Go to Page]
7.2 Transmitter
Table 8 — Mode T, Transmitter [Go to Page]
7.3 Receiver
Table 9 — Receiver (T2 only) [Go to Page]
7.4 Data encoding and preamble [Go to Page]
7.4.1 General
7.4.2 Meter transmit, “3 out of 6” data encoding [Go to Page]
7.4.2.1 Coding rules
Table 10 — Mode T, meter transmit, 3 out of 6 data encoding [Go to Page]
7.4.2.2 Order of transmission of the encoded data
7.4.2.3 Preamble and synchronization pattern
7.4.3 Other Device transmit, Manchester encoding [Go to Page]
7.4.3.1 Coding rules
7.4.3.2 Preamble and synchronization pattern
8 Mode R2 [Go to Page]
8.1 Channel properties
Table 11 — Mode R2, Channel properties [Go to Page]
8.2 Transmitter
Table 12 — Mode R2, Transmitter [Go to Page]
8.3 Receiver
Table 13 — Mode R2, Receiver [Go to Page]
8.4 Data encoding and preamble [Go to Page]
8.4.1 Data encoding
8.4.2 Order of transmission of the encoded data
8.4.3 Preamble and synchronization pattern
9 Mode C [Go to Page]
9.1 Channel properties
Table 14 — Mode C, Channel properties [Go to Page]
9.2 Transmitter
Table 15 — Mode C, Transmitter [Go to Page]
9.3 Receiver
Table 16 — Mode C, Receiver [Go to Page]
9.4 Data encoding and preamble [Go to Page]
9.4.1 Encoding
9.4.2 Preamble and synchronization pattern
10 Mode N [Go to Page]
10.1 Channel properties
Table 17 — Mode N, Channel properties, sub-band A
Table 18 — Mode N, Channel properties, sub-band B
Table 19 — Mode N, Channel properties, sub-band C
Table 20 — Mode N, Channel properties, sub-band D [Go to Page]
10.2 Physical link parameters
Table 21 — Mode N, Frequencies, and channels
Table 22 — Mode N, Modulation, and timing [Go to Page]
10.3 Receiver sensitivity
Table 23 — Mode N, Receiver [Go to Page]
10.4 Data encoding and preamble [Go to Page]
10.4.1 Encoding
10.4.2 Preamble and synchronization pattern
11 Mode F [Go to Page]
11.1 Channel properties
Table 24 — Mode F, Channel properties [Go to Page]
11.2 Physical link parameters
Table 25 — Mode F, Transmitter parameters [Go to Page]
11.3 Receiver sensitivity
Table 26 — Mode F, Receiver [Go to Page]
11.4 Data encoding and preamble [Go to Page]
11.4.1 Data Encoding
11.4.2 Preamble and synchronization pattern
12 Data Link Layer [Go to Page]
12.1 General
12.2 Order of multi byte fields
12.3 Frame format A
Table 27 — Format A, format of first block
Table 28 — Format A, format of second block
Table 29 — Format A, format of optional block(s) [Go to Page]
12.4 Frame format B
Table 30 — Format B, format of first block
Table 31 — Format B, format of second block
Table 32 — Format B, format of optional block(s) [Go to Page]
12.5 Field definitions [Go to Page]
12.5.1 General
12.5.2 Multi byte fields
12.5.3 Length field (L-Field)
12.5.4 Control field (C-Field)
Table 33 — C-field data format
Table 34 — Function codes of the C-field in messages sent from primary stations
Table 35 — Function codes of C-field in messages sent from secondary stations [Go to Page]
12.5.5 Manufacturer ID (M-field)
12.5.6 Address (A-field)
12.5.7 Cyclic redundancy check (CRC-field)
12.5.8 Control information field (CI-field)
12.6 Timing [Go to Page]
12.6.1 Timing for installation messages
12.6.2 Synchronous transmissions of meter messages
Table 36 — Maximum values of nominal transmission interval, tNOM [Go to Page]
12.6.3 Access timing [Go to Page]
12.6.3.1 General
12.6.3.2 Mode R, S, T, C, N and F: Access to meter
Table 37 — Accessibility of an R-, S-, T-, C-, N-, F-meter [Go to Page]
12.6.3.3 Frequent Access Cycle (FAC)
12.7 Repeated or duplicate messages
12.8 Forward error correction (FEC) [Go to Page]
12.8.1 Overview
12.8.2 Datagram structure [Go to Page]
12.8.2.1 General
Table 38 — Datagram structure with FEC [Go to Page]
12.8.2.2 FEC header
Table 39— FEC header structure
Table 40 — FEC ID allocation [Go to Page]
12.8.2.3 FEC check data
12.8.3 FEC Algorithm [Go to Page]
12.8.3.1 General
12.8.3.2 Reed Solomon (255,223)
Table 41 — Possible use of FEC for different modes
13 Connection to higher protocol layers [Go to Page]
13.1 The Control information field (CI-field)
Table 42 — Cl−field [Go to Page]
13.2 CI-fields for the Extended Link Layer [Go to Page]
13.2.1 General
Table 43 — CI-fields for the Extended Link Layer [Go to Page]
13.2.2 CI-field = 8Ch
Table 44 — Extended Link Layer with CI = 8Ch [Go to Page]
13.2.3 CI-field = 8Dh
Table 45 — Extended Link Layer with CI = 8Dh [Go to Page]
13.2.4 CI-field = 8Eh
Table 46 — Extended Link Layer with CI = 8Eh [Go to Page]
13.2.5 CI-field = 8Fh
Table 47 — Extended Link Layer with CI = 8Fh [Go to Page]
13.2.6 CI-field = 86h
Table 48 — Extended Link Layer with CI field 86h
Table 49 — Extended Link Layer Control, ECL, field (1 byte) [Go to Page]
13.2.7 Communication Control Field (CC-field) [Go to Page]
13.2.7.1 General
Table 50 — Communication Control Field [Go to Page]
13.2.7.2 Bi-directional Subfield (B-field)
13.2.7.3 Response Delay Subfield (D-field)
Table 51 — Response Delay Specification [Go to Page]
13.2.7.4 Synchronized Subfield (S-field)
13.2.7.5 Hop Count Subfield (H-field)
13.2.7.6 Priority Subfield (P-field)
13.2.7.7 Accessibility Subfield (A-field)
13.2.7.8 Repeated Access Subfield (R-field)
13.2.7.9 Extended Delay Subfield (X-field)
13.2.8 Access Number Field (ACC-field)
13.2.9 Manufacturer ID 2 (M2-field)
13.2.10 Address 2 (A2-field)
13.2.11 Session Number Field (SN-field) [Go to Page]
13.2.11.1 General
Table 52 — Session Number Field [Go to Page]
13.2.11.2 ENC-subfield
Table 53 — Encryption [Go to Page]
13.2.11.3 Time-field
13.2.11.4 Session-field
13.2.11.5 Specification of a session
13.2.12 AES-128 Counter Mode Encryption [Go to Page]
13.2.12.1 General
Table 54 — AES-128 (CTR) Initial Counter Block [Go to Page]
13.2.12.2 Manufacturer ID field (M-field)
13.2.12.3 Address field (A-field)
13.2.12.4 Communication Control Field (CC-field)
13.2.12.5 Session Number Field (SN-field)
13.2.12.6 Frame Number (FN)
13.2.12.7 Block Counter (BC)
13.2.13 Run Time Delay field (RTD-field)
13.2.14 Reception Level field (RXL-field)
Table 55 — Meaning of the RXL-field
Table 56 — Coding of reception level (RL) in RXL-field
Figure 1 — Example of the usage of the RXL-field (using RSSI) [Go to Page]
13.2.15 Payload Checksum Field (PayloadCRC-field)
13.3 CI-fields for the Transport Layer [Go to Page]
13.3.1 General
13.3.2 Short Transport Layer
Table 57 — Short Transport Layer [Go to Page]
13.3.3 Long Transport Layer
Table 58 — Long Transport Layer
14 Management functions for link control [Go to Page]
14.1 General
Table 59 — Function fields for the management of radio parameters
Figure 2 — Preparation for change of radio parameters
Figure 3 — Start up after change of radio parameters [Go to Page]
14.2 Set Radio Parameters [Go to Page]
14.2.1 General
14.2.2 Command [Go to Page]
14.2.2.1 General
Table 60 —Format of Set Radio Parameters command, part 1
Table 61 —Format of Set Radio Parameters command, part 2 [Go to Page]
14.2.2.2 SF
Table 62 — SF field allocation [Go to Page]
14.2.2.3 SF2
Table 63 — SF2 field allocation [Go to Page]
14.2.2.4 Activation time
14.2.2.5 Fall back time
14.2.2.6 Mode
Table 64 — Mode selection [Go to Page]
14.2.2.7 Frame format
Table 65 — Frame format selection [Go to Page]
14.2.2.8 Tx-power
Table 66 — Configuration of Tx power [Go to Page]
14.2.2.9 Tx-Interval
14.2.2.10 Up-Channel
14.2.2.11 Down-Channel
14.2.2.12 Manuf
Table 67 — Format of manufacturer specific commands [Go to Page]
14.2.2.13 FAC transmission delay
14.2.3 Response [Go to Page]
14.2.3.1 General
Table 68 — Format of Set Radio Parameters response [Go to Page]
14.2.3.2 SF
Table 69 — SF field allocation [Go to Page]
14.2.3.3 Power level
Table 70 — Used power level [Go to Page]
14.2.3.4 Error report
Table 71 — Error report [Go to Page]
14.2.3.5 Manuf. error report
14.2.3.6 Error2 report
Table 72 — Error2 report (part 1)
Table 73 — Error2 report (part 2) [Go to Page]
14.3 Get Radio Parameters [Go to Page]
14.3.1 General
14.3.2 Command [Go to Page]
14.3.2.1 General
Table 74 —Format of Get Radio Parameters command [Go to Page]
14.3.2.2 SF
14.3.3 Response [Go to Page]
14.3.3.1 General
Table 75 — Format of Get Radio Parameters response, part 1
Table 76 — Format of Get Radio Parameters response, part 2 [Go to Page]
14.3.3.2 SF
Table 77 — SF field allocation [Go to Page]
14.3.3.3 SF2
Table 78 — SF2 field allocation [Go to Page]
14.3.3.4 Activation time
14.3.3.5 Fall back time
14.3.3.6 Mode
14.3.3.7 Frame format
14.3.3.8 Tx-power
14.3.3.9 Tx-Interval
14.3.3.10 Up-Channel
14.3.3.11 Down-Channel
14.3.3.12 Manuf
14.3.3.13 FAC transmission delay
14.4 Set limited radio parameters [Go to Page]
14.4.1 General
14.4.2 Command [Go to Page]
14.4.2.1 General
Table 79 —Format of Set Limited Radio Parameters command, part 1
Table 80 —Format of Set Limited Radio Parameters command, part 2 [Go to Page]
14.4.2.2 SF field
Table 81 — SF bit allocation [Go to Page]
14.4.2.3 SF2
14.4.2.4 Activation time
14.4.2.5 Fall back time
14.4.2.6 Tx-power
14.4.2.7 Tx - interval
14.4.2.8 Up-Channel
14.4.2.9 Manuf
14.4.2.10 FAC transmission delay
14.4.3 Response [Go to Page]
14.4.3.1 General
Table 82 — Format of Set Limited Radio Parameters response [Go to Page]
14.4.3.2 SF
14.4.3.3 Power level
14.4.3.4 Error report
14.4.3.5 Manuf. error report
14.4.3.6 Error2 report
14.5 Confirm Radio Parameters [Go to Page]
14.5.1 General
14.5.2 Command [Go to Page]
14.5.2.1 Format
Table 83 —Format of Confirm Radio Parameters command [Go to Page]
14.5.2.2 SF
Table 84 — SF bit allocation [Go to Page]
14.5.2.3 Fall-back time
14.5.3 Response [Go to Page]
14.5.3.1 Format
Table 85 — Format of Confirm Radio Parameters response [Go to Page]
14.5.3.2 SF
Table 86 — SF bit allocation [Go to Page]
14.5.3.3 Error report
Table 87 — Error report allocation [Go to Page]
14.6 Set manufacturer specific parameters [Go to Page]
14.6.1 General
14.6.2 Command [Go to Page]
14.6.2.1 Format
Table 88 — Format of manufacturer specific commands [Go to Page]
14.6.2.2 SF
Table 89 — SF-field allocation [Go to Page]
14.6.2.3 Man.ID
14.6.2.4 Len
14.6.2.5 Man. Spec. fields
14.6.3 Response [Go to Page]
14.6.3.1 Format
Table 90 — Format of Manufacture Specific response [Go to Page]
14.6.3.2 SF
Table 91 — SF bit allocation [Go to Page]
14.6.3.3 Manufacturer specific report
Annex A (informative) Frequency allocation and transmit power for the 868 MHz band
Figure A.1 — Frequency allocation and transmit power for the 868 MHz band
Figure A.2 — Frequency allocation and duty cycle for the 868 MHz band
Annex B (informative) Frequency allocation for the 169 MHz band
B.1 Frequencies and allowed power levels
Figure B.1 — Frequencies and allowed power levels
B.2 Frequencies and corresponding maximum duty cycles
Figure B.2 — Frequencies and allowed duty cycles
Annex C (informative) Frame examples
C.1 Example of a frame from a meter in mode S
C.1.1 Conditions
C.1.2 Block content
C.1.3 Bit string
C.2 Example of a frame from a meter in mode T1
C.2.1 Condition
C.2.2 Block Content
C.2.3 Bit string
C.3 Example of a frame from a meter in mode C1
C.3.1 Conditions
C.3.2 Block content
Table C.1 — Mode C format B block content
C.3.3 Bit string
Annex D (informative) Example of predictive reception of synchronous messages
Figure D.1 — Prediction of the synchronous transmission time
Annex E (informative) Timing diagrams
Figure E.1 — Legend of how to read the timing diagram
Figure E.2 — Installation timing
Figure E.3 — Connection applying Long Transport Layer
Figure E.4 — Connection applying Short Transport Layer
Figure E.5 — Time out, FAC
Figure E.6 — Access demand
Figure E.7 — RF-connection using SND-UD2
Figure E.8 — Mode C, normal transfer
Figure E.9 — Mode C, transfer involving repeater
Figure E.10 — Mode C, using FAC
Figure E.11 — Mode C, fast or slow response delay
Figure E.12 — Preparation for multicast
Figure E.13 — Multicast synchronization and transfer using SND-UD3
Annex F (informative) Counter Mode Flow
Figure F.1 — AES (128) counter mode encryption flow
Figure F.2 — AES (128) counter mode decryption flow
Bibliography [Go to Page]

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