ETSI TS 103 311-2 V1.1.1 (2017-02)

Integrated broadband cable telecommunication networks (CABLE); Fourth Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 2: Physical Layer; DOCSIS® 3.1

DTS/CABLE-00017-2

General Information

• Status: Published
• Publication Date: 14-Feb-2017
• Technical Committee: CABLE WG1 - Architecture, Interfaces, protocols
• Current Stage: 12 - Completion
• Due Date: 20-Jun-2017
• Completion Date: 15-Feb-2017

Standards Content (Sample)

ETSI TS 103 311-2 V1.1.1 (2017-02)






TECHNICAL SPECIFICATION
Integrated broadband cable
telecommunication networks (CABLE);
Fourth Generation Transmission Systems for Interactive Cable
Television Services - IP Cable Modems;
Part 2: Physical Layer;
®
DOCSIS 3.1

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2 ETSI TS 103 311-2 V1.1.1 (2017-02)



Reference
DTS/CABLE-00017-2
Keywords
access, broadband, cable, data, DOCSIS, IP,
IPCable, modem
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3 ETSI TS 103 311-2 V1.1.1 (2017-02)
Contents
Intellectual Property Rights . 10
Foreword . 10
Modal verbs terminology . 10
1 Scope . 11
2 References . 11
2.1 Normative references . 11
2.2 Informative references . 13
3 Definitions, symbols and abbreviations . 13
3.1 Definitions . 13
3.2 Symbols . 26
3.3 Abbreviations . 27
4 Requirements and Conventions . 30
4.1 Requirements . 30
4.2 Conventions . 30
5 Overview and Functional Assumptions . 31
5.0 Cable Plant Characteristics . 31
5.1 Overview . 31
5.2 Functional Assumptions . 32
5.2.1 Equipment Assumptions . 32
5.2.1.1 Frequency Plan . 32
5.2.1.2 Compatibility with Other Services . 32
5.2.1.3 Fault Isolation Impact on Other Users . 33
5.2.1.4 Cable System Terminal Devices . 33
5.2.2 RF Channel Assumptions . 33
5.2.2.0 Cable Networks Interoperability . 33
5.2.2.1 Transmission Downstream . 33
5.2.2.2 Transmission Upstream . 34
5.2.2.2.0 RF Channel Transmission Characteristics . 34
5.2.2.2.1 Availability . 35
5.2.3 Transmission Levels . 35
5.2.4 Frequency Inversion . 35
6 PHY Sublayer for SC-QAM. 35
6.1 Scope . 35
6.2 Upstream Transmit and Receive . 36
6.2.1 Overview . 36
6.2.2 Signal Processing Requirements . 36
6.2.3 Modulation Formats . 36
6.2.4 R-S Encode . 36
6.2.5 Upstream R-S Frame Structure (Multiple Transmit Enabled) . 36
6.2.6 Upstream R-S Frame Structure (Multiple Transmit Disabled) . 36
6.2.7 TDMA Byte Interleaver . 36
6.2.8 Scrambler (Randomizer) . 36
6.2.9 TCM Encoder . 37
6.2.10 Preamble Prepend . 37
6.2.11 Modulation Rates . 37
6.2.12 S-CDMA Framer and Interleaver . 37
6.2.13 S-CDMA Framer . 37
6.2.14 Symbol Mapping . 37
6.2.15 S-CDMA Spreader . 37
6.2.16 Transmit Pre-Equalizer . 37
6.2.17 Spectral Shaping . 37
6.2.18 Relative Processing Delays . 37
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4 ETSI TS 103 311-2 V1.1.1 (2017-02)
6.2.19 Transmit Power Requirements . 37
6.2.20 Burst Profiles . 37
6.2.21 Burst Timing Convention . 37
6.2.22 Fidelity Requirements . 38
6.2.23 Upstream Demodulator Input Power Characteristics . 38
6.2.24 Upstream Electrical Output from the CM . 38
6.2.25 Upstream CM Transmitter Capabilities . 38
6.3 Downstream Transmit . 38
6.3.1 Downstream Protocol . 38
6.3.2 Spectrum Format . 38
6.3.3 Scaleable Interleaving to Support Video and High-Speed Data Services . 38
6.3.4 Downstream Frequency Plan . 38
6.3.5 DRFI Output Electrical . 38
6.3.6 CMTS or EQAM Clock Generation . 39
6.3.7 Downstream Symbol Clock Jitter for Synchronous Operation . 39
6.3.8 Downstream Symbol Clock Drift for Synchronous Operation . 39
6.3.9 Timestamp Jitter . 39
6.4 Downstream Receive . 39
6.4.1 Downstream Protocol and Interleaving Support . 39
6.4.2 Downstream Electrical Input to the CM . 39
6.4.3 CM BER Performance . 39
6.4.4 Downstream Multiple Receiver Capabilities . 39
6.4.5 Non-Synchronous DS Channel Support . 40
7 PHY Sublayer for OFDM. 40
7.1 Scope . 40
7.2 Upstream and Downstream Frequency Plan . 40
7.2.0 System Spectrum Requirement . 40
7.2.1 Downstream CM Spectrum . 40
7.2.2 Downstream CMTS Spectrum . 40
7.2.3 Upstream CM Spectrum . 40
7.2.4 Upstream CMTS Spectrum . 41
7.2.5 Channel Band Rules. 41
7.2.5.0 OFDM/OFDMA Channel Planning . 41
7.2.5.1 Downstream Channel Bandwidth Rules. 41
7.2.5.2 Downstream Exclusion Band Rules . 42
7.2.5.3 Upstream Channel Bandwidth Rules . 43
7.2.5.4 Upstream Exclusion Band Rules . 43
7.3 OFDM Numerology . 43
7.3.1 Downstream OFDM Numerology . 43
7.3.2 Upstream OFDMA Numerology . 44
7.3.3 Subcarrier Clocking . 44
7.4 Upstream Transmit and Receive . 45
7.4.1 Overview . 45
7.4.2 Signal Processing Requirements . 45
7.4.2.0 OFDMA Frames . 45
7.4.2.1 Framing . 46
7.4.2.2 Forward Error Correction Encoding . 47
7.4.2.3 Randomizer and Symbol Mapper . 47
7.4.2.4 OFDMA framer and Interleaver . 47
7.4.2.5 Pre-Equalization . 47
7.4.2.6 IFFT Transformation . 47
7.4.2.7 Cyclic Prefix and Windowing . 47
7.4.3 Time and Frequency Synchronization . 48
7.4.3.0 Timing and Frequency Synchronization Requirements . 48
7.4.3.1 Channel Frequency Accuracy . 48
7.4.3.2 Channel Timing Accuracy . 48
7.4.3.3 Modulation Timing Jitter . 48
7.4.3.4 Upstream Subcarrier Clock Frequency . 48
7.4.4 Forward Error Correction . 49
7.4.4.0 Upstream Codword Parameters . 49
7.4.4.1 FEC Codeword Selection . 49
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5 ETSI TS 103 311-2 V1.1.1 (2017-02)
7.4.4.1.0 FEC Codeword Size . 49
7.4.4.1.1 FEC Codeword Selection Algorithm . 49
7.4.4.2 FEC Encoding . 52
7.4.4.3 Shortening of LDPC Codewords . 54
7.4.5 Data Randomization . 54
7.4.6 Time and Frequency Interleaving and De-interleaving. 54
7.4.7 Mapping of Bits to Cell Words . 60
7.4.8 Mapping and De-mapping Bits to/from QAM Subcarriers . 61
7.4.8.0 Minislots Structure . 61
7.4.8.1 Modulation Formats . 61
7.4.8.2 Constellation Mapping . 61
7.4.9 REQ Messages . 62
7.4.10 IDFT . 62
7.4.11 Cyclic Prefix and Windowing . 63
7.4.11.0 Background and General Requirements . 63
7.4.11.1 Cyclic Prefix and Windowing Algorithm . 65
7.4.11.2 Parameter Optimization . 67
7.4.11.2.1 Impacts of Cyclic Prefix and Windowing . 67
7.4.11.2.2 Joint Optimization of Cyclic Prefix and Windowing Parameters . 67
7.4.12 Burst Timing Convention . 67
7.4.12.0 OFDMA Transmission . 67
7.4.12.1 Upstream Time Reference of an OFDMA Frame . 68
7.4.12.2 Upstream Time Reference of an OFDMA Symbol . 68
7.4.13 Fidelity Requirements . 68
7.4.13.0 CM Transmit Channel Set . 68
7.4.13.1 Maximum Scheduled Minislots . 69
7.4.13.2 Transmit Power Requirements . 69
7.4.13.2.0 Transmit Power Requirements Overview . 69
7.4.13.2.1 Transmit Power Requirements with Multiple Transmit Channel Mode Enabled . 70
7.4.13.3 OFDMA Transmit Power Calculations . 73
7.4.13.4 Global Reconfiguration Time for OFDMA Channels . 74
7.4.13.5 OFDMA Fidelity Requirements . 75
7.4.13.5.0 TCS Fidelity Requirements . 75
7.4.13.5.1 Spurious Emissions . 75
7.4.13.5.1.0 Spurious Emissions Requirements . 75
7.4.13.5.2 Spurious Emissions During Burst On/Off Transients . 80
7.4.13.5.3 MER Requirements . 80
7.4.14 Cable Modem Transmitter Output Requirements . 82
7.4.15 CMTS Receiver Capabilities . 84
7.4.15.1 CMTS Receiver Input Power Requirements . 84
7.4.15.2 CMTS Receiver Error Ratio Performance in AWGN Channel . 84
7.4.16 Ranging . 85
7.4.16.0 Ranging Procedure . 85
7.4.16.1 Initial Ranging . 85
7.4.16.1.1 Initial Ranging Zone . 85
7.4.16.1.2 Initial Ranging Signal . 86
7.4.16.1.3 Preamble Construction . 87
7.4.16.1.4 FEC for the Initial Ranging Data . 87
7.4.16.1.5 Padding and Randomizing . 88
7.4.16.1.6 Symbol Duplicating Cyclic Prefix and Windowing . 88
7.4.16.2 Fine Ranging . 89
7.4.16.2.0 Fine Ranging Operations . 89
7.4.16.2.1 Fine Ranging Signal . 89
7.4.16.2.2 Transmission of the Fine Ranging Signal . 90
7.4.16.2.3 Fine Ranging FEC . 91
7.4.16.2.4 Padding and Randomizing . 92
7.4.16.2.5 Exclusion Bandwidths . 92
7.4.16.2.6 Allowed Values and Ranges for Configuration Parameters . 93
7.4.16.2.7 Power and Time Adjustments . 94
7.4.16.3 Probing . 94
7.4.16.3.0 Probing Usage . 94
7.4.16.3.1 Probing Frame . 94
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6 ETSI TS 103 311-2 V1.1.1 (2017-02)
7.4.16.3.2 Probing Symbol Pilots .
...