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ISSUEDSPECIFICATIONNotice

This document is a cooperative effort undertaken at the direction ofCable Television Laboratories, Inc. for the benefit of the cable industry ingeneral. Neither CableLabs nor any member company is responsible forany liability of any nature whatsoever resulting from or arising out of useor reliance upon this specification by any party. This document isfurnished on an AS IS basis and neither CableLabs nor its membersprovides any representation or warranty, express or implied, regardingits accuracy, completeness, or fitness for a particular purpose.

Copyright 1999-2004 Cable Television Laboratories, Inc.All rights reserved.able Service Interface SpecificationsDOCSIS 2.0

dio Frequency Interface Specification

CM-SP-RFIv2.0-I07-041210

golowSuperseded

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface Specifications

ii

Document Status Sheet

Key to Document Status CodesWork in Process: An incomplete document, designed to guide discussion and generate feedback, that mayinclude several alternative requirements for consideration.

Draft: A document in specification format considered largely complete, but lacking review by cable industry andvendors. Drafts are susceptible to substantial change during the review process.

Issued: A stable document, which has undergone rigorous member and vendor review and is suitable for productdesign and development, cross-vendor interoperability, and for certification testing.

Closed: A static document, reviewed, tested, validated, and closed to further engineering change requests to thespecification through CableLabs.

Trademarks:

DOCSIS, eDOCSIS, PacketCable, CableHome, OpenCable, CableCARD, CableOffice , and CableLabs are trademarks of Cable Television Laboratories, Inc.

Document Control Number: CM-SP-RFIv2.0-I07-041210

Reference: Radio Frequency Interface Specification

Revision History: I01 First Issued Release, December 31, 2001I02 Second Issued Release, June 17, 2002I03 Third Issued Release, December 18, 2002I04 Fourth Issued Release, July 30, 2003I05 Fifth Issued Release, April 7, 2004I06 Sixth Issued Release, August 4, 2004I07 Seventh Issued Release, December 10, 2004

Date: December 10, 2004

Status Code: Work in Process

Draft Issued Closed

Distribution Restrictions: CableLabs only

CLReviewers

CLVendor

Public

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210Table of Contents1 SCOPE AND PURPOSE.................................................................................................................................1

1.1 SCOPE ................................................................................................................................................................11.2 REQUIREMENTS .................................................................................................................................................21.3 BACKGROUND ...................................................................................................................................................2

1.3.1 Service Goals ..........................................................................................................................................21.3.2 Reference Architecture ...........................................................................................................................31.3.3 Categories of Interface Specification .....................................................................................................51.3.4 Statement of Compatibility .....................................................................................................................5

1.4 CONVENTIONS FOR THIS SPECIFICATION...........................................................................................................5

2 REFERENCES (NORMATIVE/INFORMATIVE) .....................................................................................7

3 GLOSSARY (INFORMATIVE) ..................................................................................................................11

4 FUNCTIONAL ASSUMPTIONS.................................................................................................................23

4.1 BROADBAND ACCESS NETWORK ....................................................................................................................234.2 EQUIPMENT ASSUMPTIONS..............................................................................................................................23

4.2.1 Frequency Plan.....................................................................................................................................234.2.2 Compatibility with Other Services........................................................................................................244.2.3 Fault Isolation Impact on Other Users.................................................................................................244.2.4 Cable System Terminal Devices ...........................................................................................................24

4.3 RF CHANNEL ASSUMPTIONS ...........................................................................................................................244.3.1 Transmission Downstream ...................................................................................................................244.3.2 Transmission Upstream........................................................................................................................25

4.4 TRANSMISSION LEVELS ...................................................................................................................................264.5 FREQUENCY INVERSION ..................................................................................................................................26

5 COMMUNICATION PROTOCOLS ..........................................................................................................27

5.1 PROTOCOL STACK ...........................................................................................................................................275.1.1 CM and CMTS as Hosts .......................................................................................................................275.1.2 Data Forwarding Through the CM and CMTS ....................................................................................28

5.2 THE MAC FORWARDER ..................................................................................................................................315.2.1 Rules for Data-Link-Layer Forwarding ...............................................................................................32

5.3 NETWORK LAYER............................................................................................................................................325.3.1 Requirements for IGMP Management..................................................................................................33

5.4 ABOVE THE NETWORK LAYER ........................................................................................................................355.5 DATA LINK LAYER..........................................................................................................................................35

5.5.1 LLC Sublayer ........................................................................................................................................365.5.2 Link-Layer Security Sublayer ...............................................................................................................365.5.3 MAC Sublayer.......................................................................................................................................36

5.6 PHYSICAL LAYER ............................................................................................................................................365.6.1 Downstream Transmission Convergence Sublayer ..............................................................................36iii

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface Specifications5.6.2 PMD Sublayer...................................................................................................................................... 37

6 PHYSICAL MEDIA DEPENDENT SUBLAYER SPECIFICATION .................................................... 39

6.1 SCOPE ............................................................................................................................................................. 396.2 UPSTREAM ...................................................................................................................................................... 39

6.2.1 Overview .............................................................................................................................................. 396.2.2 Signal Processing Requirements ......................................................................................................... 406.2.3 Modulation Formats ............................................................................................................................ 446.2.4 R-S Encode........................................................................................................................................... 446.2.5 R-S Frame Structure ............................................................................................................................ 456.2.6 TDMA Byte Interleaver........................................................................................................................ 476.2.7 Scrambler (Randomizer)...................................................................................................................... 506.2.8 TCM Encoder....................................................................................................................................... 506.2.9 Preamble Prepend ............................................................................................................................... 536.2.10 Modulation Rates ............................................................................................................................... 546.2.11 S-CDMA Framer and Interleaver...................................................................................................... 546.2.12 S-CDMA Framer................................................................................................................................ 616.2.13 Symbol Mapping ................................................................................................................................ 646.2.14 S-CDMA Spreader ............................................................................................................................. 726.2.15 Transmit Pre-Equalizer ..................................................................................................................... 746.2.16 Spectral Shaping ................................................................................................................................ 766.2.17 Relative Processing Delays ............................................................................................................... 776.2.18 Transmit Power Requirements........................................................................................................... 786.2.19 Burst Profiles ..................................................................................................................................... 836.2.20 Burst Timing Convention ................................................................................................................... 896.2.21 Fidelity Requirements ........................................................................................................................ 906.2.22 Upstream Demodulator Input Power Characteristics....................................................................... 986.2.23 Upstream Electrical Output from the CM ......................................................................................... 98

6.3 DOWNSTREAM ................................................................................................................................................ 996.3.1 Downstream Protocol .......................................................................................................................... 996.3.2 Scalable Interleaving to Support Low Latency.................................................................................... 996.3.3 Downstream Frequency Plan ............................................................................................................ 1006.3.4 CMTS Output Electrical .................................................................................................................... 1006.3.5 Downstream Electrical Input to CM.................................................................................................. 1016.3.6 CM BER Performance ....................................................................................................................... 1016.3.7 CMTS Timestamp Jitter ..................................................................................................................... 1026.3.8 CMTS Clock Generation.................................................................................................................... 1046.3.9 CMTS Downstream Symbol Clock Jitter for Synchronous Operation .............................................. 1056.3.10 CMTS Downstream Symbol Clock Drift for Synchronous Operation ............................................. 105

7 DOWNSTREAM TRANSMISSION CONVERGENCE SUBLAYER ................................................. 107

7.1 INTRODUCTION ............................................................................................................................................. 1077.2 MPEG PACKET FORMAT.............................................................................................................................. 107iv

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-0412107.3 MPEG HEADER FOR DOCSIS DATA-OVER-CABLE .....................................................................................1087.4 MPEG PAYLOAD FOR DOCSIS DATA-OVER-CABLE...................................................................................108

7.4.1 stuff_byte.............................................................................................................................................1087.4.2 pointer_field........................................................................................................................................108

7.5 INTERACTION WITH THE MAC SUBLAYER....................................................................................................1097.6 INTERACTION WITH THE PHYSICAL LAYER...................................................................................................1107.7 MPEG HEADER SYNCHRONIZATION AND RECOVERY ..................................................................................110

8 MEDIA ACCESS CONTROL SPECIFICATION...................................................................................111

8.1 INTRODUCTION ..............................................................................................................................................1118.1.1 Overview.............................................................................................................................................1118.1.2 Definitions ..........................................................................................................................................1118.1.3 Future Use ..........................................................................................................................................114

8.2 MAC FRAME FORMATS ................................................................................................................................1148.2.1 Generic MAC Frame Format .............................................................................................................1148.2.2 Packet-Based MAC Frames................................................................................................................1188.2.3 ATM Cell MAC Frames ......................................................................................................................1198.2.4 Reserved PDU MAC Frames..............................................................................................................1198.2.5 MAC-Specific Headers .......................................................................................................................1208.2.6 Extended MAC Headers .....................................................................................................................1268.2.7 Fragmented MAC Frames ..................................................................................................................1308.2.8 Error-Handling...................................................................................................................................132

8.3 MAC MANAGEMENT MESSAGES ..................................................................................................................1338.3.1 MAC Management Message Header ..................................................................................................1338.3.2 Time Synchronization (SYNC) ............................................................................................................1368.3.3 Upstream Channel Descriptor (UCD)................................................................................................1368.3.4 Upstream Bandwidth Allocation Map (MAP) ....................................................................................1458.3.5 Ranging Request (RNG-REQ) ............................................................................................................1478.3.6 Ranging Response (RNG-RSP)...........................................................................................................1498.3.7 Registration Request (REG-REQ) ......................................................................................................1548.3.8 Registration Response (REG-RSP).....................................................................................................1558.3.9 Registration Acknowledge (REG-ACK)..............................................................................................1588.3.10 Upstream Channel Change Request (UCC-REQ)............................................................................1608.3.11 Upstream Channel Change Response (UCC-RSP) ..........................................................................1608.3.12 Dynamic Service Addition Request (DSA-REQ) ..........................................................................1618.3.13 Dynamic Service Addition Response (DSA-RSP) ........................................................................1638.3.14 Dynamic Service Addition Acknowledge (DSA-ACK) .................................................................1658.3.15 Dynamic Service Change Request (DSC-REQ) ...........................................................................1668.3.16 Dynamic Service Change Response (DSC-RSP)..........................................................................1678.3.17 Dynamic Service Change Acknowledge (DSC-ACK) ..................................................................1698.3.18 Dynamic Service Deletion Request (DSD-REQ)..........................................................................1708.3.19 Dynamic Service Deletion Response (DSD-RSP)..........................................................................1718.3.20 Dynamic Channel Change Request (DCC-REQ) ..........................................................................171v

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface Specifications8.3.21 Dynamic Channel Change Response (DCC-RSP)........................................................................ 1778.3.22 Dynamic Channel Change Acknowledge (DCC-ACK)................................................................. 1798.3.23 Device Class Identification Request (DCI-REQ)............................................................................. 1818.3.24 Device Class Identification Response (DCI-RSP) ........................................................................... 1818.3.25 Upstream Transmitter Disable (UP-DIS) MAC Management Message ......................................... 1828.3.26 Initial Ranging Request (INIT-RNG-REQ)...................................................................................... 1848.3.27 Test Request (TST-REQ) .................................................................................................................. 185

9 MEDIA ACCESS CONTROL PROTOCOL OPERATION.................................................................. 189

9.1 UPSTREAM BANDWIDTH ALLOCATION......................................................................................................... 1899.1.1 The Allocation MAP MAC Management Message ............................................................................ 1909.1.2 Information Elements......................................................................................................................... 1909.1.3 Requests ............................................................................................................................................. 1939.1.4 Information Element Feature Usage Summary ................................................................................. 1949.1.5 Map Transmission and Timing .......................................................................................................... 1949.1.6 Protocol Example .............................................................................................................................. 1959.1.7 MAP Generation Example - Two Logical Upstreams ....................................................................... 196

9.2 SUPPORT FOR MULTIPLE CHANNELS............................................................................................................ 1979.3 TIMING AND SYNCHRONIZATION.................................................................................................................. 197

9.3.1 Global Timing Reference ................................................................................................................... 1989.3.2 CM Channel Acquisition.................................................................................................................... 1989.3.3 Ranging.............................................................................................................................................. 1999.3.4 Timing Units and Relationships......................................................................................................... 200

9.4 UPSTREAM TRANSMISSION AND CONTENTION RESOLUTION ....................................................................... 2019.4.1 Contention Resolution Overview ....................................................................................................... 2029.4.2 Transmit Opportunities...................................................................................................................... 2039.4.3 CM Bandwidth Utilization ................................................................................................................. 204

9.5 DATA LINK ENCRYPTION SUPPORT.............................................................................................................. 2049.5.1 MAC Messages .................................................................................................................................. 2049.5.2 Framing ............................................................................................................................................. 204

10 QUALITY OF SERVICE AND FRAGMENTATION.......................................................................... 20510.1 THEORY OF OPERATION ............................................................................................................................. 205

10.1.1 Concepts........................................................................................................................................... 20610.1.2 Object Model.................................................................................................................................... 21010.1.3 Service Classes ................................................................................................................................ 21110.1.4 Authorization ................................................................................................................................... 21210.1.5 Types of Service Flows .................................................................................................................... 21310.1.6 Service Flows and Classifiers.......................................................................................................... 21510.1.7 General Operation ........................................................................................................................... 216

10.2 UPSTREAM SERVICE FLOW SCHEDULING SERVICES .................................................................................. 21910.2.1 Unsolicited Grant Service................................................................................................................ 22010.2.2 Real-Time Polling Service ............................................................................................................... 221vi

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-04121010.2.3 Unsolicited Grant Service with Activity Detection...........................................................................22110.2.4 Non-Real-Time Polling Service ........................................................................................................22210.2.5 Best Effort Service ............................................................................................................................22210.2.6 Other Services...................................................................................................................................22210.2.7 Parameter Applicability for Upstream Service Scheduling..............................................................22310.2.8 CM Transmit Behavior .....................................................................................................................223

10.3 FRAGMENTATION ........................................................................................................................................22410.3.1 CM Fragmentation Support..............................................................................................................22410.3.2 CMTS Fragmentation Support .........................................................................................................22710.3.3 Fragmentation Example ...................................................................................................................228

10.4 PAYLOAD HEADER SUPPRESSION................................................................................................................23210.4.1 Overview...........................................................................................................................................23210.4.2 Example Applications .......................................................................................................................23310.4.3 Operation..........................................................................................................................................23310.4.4 Signaling ...........................................................................................................................................23510.4.5 Payload Header Suppression Examples...........................................................................................236

11 CABLE MODEM - CMTS INTERACTION.........................................................................................239

11.1 CMTS INITIALIZATION................................................................................................................................23911.2 CABLE MODEM INITIALIZATION..................................................................................................................239

11.2.1 Scanning and Synchronization to Downstream................................................................................24111.2.2 Obtain Upstream Parameters...........................................................................................................24211.2.3 Message Flows During Scanning and Upstream Parameter Acquisition ........................................24511.2.4 Ranging and Automatic Adjustments................................................................................................24611.2.5 Device Class Identification...............................................................................................................25011.2.6 Establish IP Connectivity .................................................................................................................25011.2.7 Establish Time of Day.......................................................................................................................25111.2.8 Transfer Operational Parameters ....................................................................................................25211.2.9 Registration ......................................................................................................................................25311.2.10 Baseline Privacy Initialization .......................................................................................................25811.2.11 Service IDs During CM Initialization.............................................................................................25911.2.12 Multiple-Channel Support ..............................................................................................................259

11.3 STANDARD OPERATION...............................................................................................................................25911.3.1 Periodic Signal Level Adjustment.....................................................................................................25911.3.2 Changing Upstream Channel Descriptor Message Parameters ......................................................26211.3.3 Changing Upstream Channels..........................................................................................................263

11.4 DYNAMIC SERVICE......................................................................................................................................26711.4.1 Dynamic Service Flow State Transitions..........................................................................................26811.4.2 Dynamic Service Addition ................................................................................................................27611.4.3 Dynamic Service Change..................................................................................................................28711.4.4 Dynamic Service Deletion ................................................................................................................29811.4.5 Dynamically Changing Downstream and/or Upstream Channels ...................................................304

11.5 FAULT DETECTION AND RECOVERY ...........................................................................................................330vii

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface Specifications11.5.1 Prevention of Unauthorized Transmissions..................................................................................... 330

12 SUPPORTING FUTURE NEW CABLE MODEM CAPABILITIES................................................. 331

12.1 DOWNLOADING CABLE MODEM OPERATING SOFTWARE .......................................................................... 331

ANNEX A WELL-KNOWN ADDRESSES................................................................................................. 333

A.1 MAC ADDRESSES........................................................................................................................................ 333A.2 MAC SERVICE IDS ...................................................................................................................................... 333

A.2.1 All CMs and No CM Service IDs....................................................................................................... 333A.2.2 Well-Known Multicast Service IDs ................................................................................................... 333A.2.3 Priority Request Service IDs ............................................................................................................. 334

A.3 MPEG PID .................................................................................................................................................. 334

ANNEX B PARAMETERS AND CONSTANTS........................................................................................ 335

ANNEX C COMMON RADIO FREQUENCY INTERFACE ENCODINGS......................................... 339C.1 ENCODINGS FOR CONFIGURATION AND MAC-LAYER MESSAGING ............................................................ 339

C.1.1 Configuration File and Registration Settings ................................................................................... 339C.1.2 Configuration-File-Specific Settings................................................................................................. 352C.1.3 Registration-Request/Response-Specific Encodings ......................................................................... 357C.1.4 Dynamic-Service-Message-Specific Encodings ................................................................................ 361

C.2 QUALITY-OF-SERVICE-RELATED ENCODINGS ............................................................................................. 362C.2.1 Packet Classification Encodings....................................................................................................... 362C.2.2 Service Flow Encodings .................................................................................................................... 370

C.3 ENCODINGS FOR OTHER INTERFACES .......................................................................................................... 387C.3.1 Telephone Settings Option ................................................................................................................ 387C.3.2 Baseline Privacy Configuration Settings Option .............................................................................. 387

C.4 CONFIRMATION CODE.................................................................................................................................. 387C.4.1 Confirmation Codes for Dynamic Channel Change ......................................................................... 389C.4.2 Confirmation Codes for Major Errors .............................................................................................. 389

ANNEX D CM CONFIGURATION INTERFACE SPECIFICATION................................................... 391

D.1 CM IP ADDRESSING .................................................................................................................................... 391D.1.1 DHCP Fields Used by the CM.......................................................................................................... 391

D.2 CM CONFIGURATION................................................................................................................................... 392D.2.1 CM Binary Configuration File Format............................................................................................. 392D.2.2 Configuration File Settings............................................................................................................... 393D.2.3 Configuration File Creation ............................................................................................................. 394

D.3 CONFIGURATION VERIFICATION .................................................................................................................. 396D.3.1 CMTS MIC Calculation .................................................................................................................... 396

ANNEX E THE DATA-OVER-CABLE SPANNING TREE PROTOCOL ............................................ 399

E.1 BACKGROUND .............................................................................................................................................. 399E.2 PUBLIC SPANNING TREE .............................................................................................................................. 399viii

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210E.3 PUBLIC SPANNING TREE PROTOCOL DETAILS..............................................................................................400E.4 SPANNING TREE PARAMETERS AND DEFAULTS ...........................................................................................401

E.4.1 Path Cost ............................................................................................................................................401E.4.2 Bridge Priority ...................................................................................................................................402

ANNEX F EUROPEAN SPECIFICATION ADDITIONS.........................................................................403

F.1 SCOPE AND PURPOSE ....................................................................................................................................403F.2 REFERENCES..................................................................................................................................................403F.3 GLOSSARY.....................................................................................................................................................403F.4 FUNCTIONAL ASSUMPTIONS..........................................................................................................................403

F.4.1 Broadband access network.................................................................................................................403F.4.2 Equipment Assumptions .....................................................................................................................404F.4.3 RF Channel Assumptions ...................................................................................................................404F.4.4 Transmission Levels ...........................................................................................................................406F.4.5 Frequency Inversion...........................................................................................................................406

F.5 COMMUNICATION PROTOCOLS......................................................................................................................407F.6 PHYSICAL MEDIA DEPENDENT SUBLAYER SPECIFICATION ..........................................................................407

F.6.1 Scope ..................................................................................................................................................407F.6.2 Upstream ............................................................................................................................................407F.6.3 Downstream .......................................................................................................................................421

F.7 DOWNSTREAM TRANSMISSION CONVERGENCE SUBLAYER ...........................................................................427F.7.1 Introduction........................................................................................................................................427F.7.2 MPEG Packet format .........................................................................................................................428F.7.3 MPEG Header for Euro-DOCSIS Data-Over-Cable.........................................................................428F.7.4 MPEG Payload for Euro-DOCSIS Data-Over-Cable .......................................................................428F.7.5 Interaction with the MAC sublayer ....................................................................................................429F.7.6 Interaction with the Physical layer ....................................................................................................429F.7.7 MPEG Header synchronization and recovery ...................................................................................429

F.8 MEDIA ACCESS CONTROL SPECIFICATION....................................................................................................429F.8.1 Introduction........................................................................................................................................429F.8.2 MAC Frame Formats .........................................................................................................................429F.8.3 MAC Management Messages .............................................................................................................429

ANNEX G DOCSIS 2.0 AND 1.0/1.1 INTEROPERABILITY...................................................................431

G.1 GENERAL INTEROPERABILITY ISSUES ..........................................................................................................431G.1.1 Provisioning.......................................................................................................................................431G.1.2 Registration........................................................................................................................................432G.1.3 Dynamic Service Establishment.........................................................................................................433G.1.4 Fragmentation ...................................................................................................................................434G.1.5 Multicast Support...............................................................................................................................434G.1.6 Changing Upstream Channels...........................................................................................................434

G.2 HYBRID DEVICES..........................................................................................................................................434G.3 DOCSIS 2.0 TDMA INTEROPERABILITY.....................................................................................................435ix

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface SpecificationsG.3.1 Mixed-mode operation with TDMA .................................................................................................. 435G.3.2 Interoperability & Performance ....................................................................................................... 436

G.4 DOCSIS 2.0 S-CDMA INTEROPERABILITY ................................................................................................ 436G.4.1 Mixed mode operation with S-CDMA............................................................................................... 436G.4.2 Interoperability & Performance ....................................................................................................... 436

ANNEX H THE DOCSIS MAC/PHY INTERFACE (DMPI) ................................................................... 437H.1 SCOPE .......................................................................................................................................................... 437H.2 CONVENTIONS.............................................................................................................................................. 437

H.2.1 Terminology ...................................................................................................................................... 437H.2.2 Ordering of Bits and Bytes................................................................................................................ 437H.2.3 Signal Naming Conventions.............................................................................................................. 437H.2.4 Active Clock Edge ............................................................................................................................. 437H.2.5 Timing Specifications........................................................................................................................ 438

H.3 OVERVIEW ................................................................................................................................................... 438H.3.1 Downstream Data ............................................................................................................................. 441H.3.2 Upstream Data.................................................................................................................................. 441H.3.3 Upstream Control ............................................................................................................................. 441H.3.4 SPI Bus.............................................................................................................................................. 441

H.4 SIGNALS....................................................................................................................................................... 442H.4.1 Downstream Data ............................................................................................................................. 442H.4.2 Upstream Data.................................................................................................................................. 442H.4.3 Upstream Control ............................................................................................................................. 443H.4.4 SPI Bus.............................................................................................................................................. 443H.4.5 Parity................................................................................................................................................. 444H.4.6 Interrupts........................................................................................................................................... 444

H.5 PROTOCOL ................................................................................................................................................... 445H.5.1 Downstream Data (ITU-T Recommendations J.83 Annex A) ........................................................... 445H.5.2 Downstream Data (ITU-T Recommendations J.83 Annex B) ........................................................... 446H.5.3 Upstream Data.................................................................................................................................. 446H.5.4 Upstream Control ............................................................................................................................. 447H.5.5 SPI Bus.............................................................................................................................................. 449

H.6 ELECTRICAL SPECIFICATIONS...................................................................................................................... 450H.6.1 DC Specifications.............................................................................................................................. 450

H.7 TIMING SPECIFICATIONS.............................................................................................................................. 451H.7.1 Downstream Data ............................................................................................................................. 451H.7.2 Upstream Data.................................................................................................................................. 451H.7.3 Upstream Control ............................................................................................................................. 451H.7.4 SPI Bus.............................................................................................................................................. 452

H.8 DATA FORMAT AND USAGE ........................................................................................................................ 452H.8.1 Downstream Data ............................................................................................................................. 452H.8.2 Upstream Data.................................................................................................................................. 452H.8.3 Upstream Control ............................................................................................................................. 458x

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210H.8.4 SPI Bus...............................................................................................................................................460

APPENDIX I MAC SERVICE DEFINITION.............................................................................................461

I.1 MAC SERVICE OVERVIEW.............................................................................................................................461I.1.1 MAC Service Parameters ....................................................................................................................462

I.2 MAC DATA SERVICE INTERFACE ..................................................................................................................463I.2.1 MAC_DATA.request............................................................................................................................463I.2.2 MAC_DATA.indicate...........................................................................................................................464I.2.3 MAC_GRANT_SYNCHRONIZE.indicate ...........................................................................................464I.2.4 MAC_CMTS_MASTER_CLOCK_SYNCHRONIZE.indicate ..............................................................465

I.3 MAC CONTROL SERVICE INTERFACE............................................................................................................465I.3.1 MAC_REGISTRATION_RESPONSE.indicate ....................................................................................465I.3.2 MAC_CREATE_SERVICE_FLOW.request ........................................................................................465I.3.3 MAC_CREATE_SERVICE_FLOW.response ......................................................................................466I.3.4 MAC_CREATE_SERVICE_FLOW.indicate .......................................................................................466I.3.5 MAC_DELETE_SERVICE_FLOW.request ........................................................................................466I.3.6 MAC_DELETE_SERVICE_FLOW.response ......................................................................................467I.3.7 MAC_DELETE_SERVICE_FLOW.indicate .......................................................................................467I.3.8 MAC_CHANGE_SERVICE_FLOW.request .......................................................................................467I.3.9 MAC_CHANGE_SERVICE_FLOW.response.....................................................................................467I.3.10 MAC_CHANGE_SERVICE_FLOW.indicate ....................................................................................468

I.4 MAC SERVICE USAGE SCENARIOS................................................................................................................468I.4.1 Transmission of PDUs from Upper Layer Service to MAC DATA Service ........................................468I.4.2 Reception of PDUs to Upper Layer Service from MAC DATA Service..............................................468I.4.3 Sample Sequence of MAC Control and MAC Data Services ..............................................................469

APPENDIX II EXAMPLE PREAMBLE SEQUENCE ..............................................................................471II.1 INTRODUCTION .............................................................................................................................................471II.2 EXAMPLE PREAMBLE SEQUENCE..................................................................................................................471

APPENDIX III MULTIPLE UPSTREAM CHANNELS ...........................................................................473

III.1 SINGLE DOWNSTREAM AND SINGLE UPSTREAM PER CABLE SEGMENT .....................................................473III.2 MULTIPLE DOWNSTREAMS AND MULTIPLE UPSTREAMS PER CABLE SEGMENT ........................................475

III.2.1 Topologies.........................................................................................................................................475III.2.2 Normal Operation.............................................................................................................................477III.2.3 Initial Ranging ..................................................................................................................................478III.2.4 Dynamic Channel Change................................................................................................................478

APPENDIX IV DOCSIS TRANSMISSION AND CONTENTION RESOLUTION...............................479

IV.1 INTRODUCTION............................................................................................................................................479IV.2 VARIABLE DEFINITIONS ..............................................................................................................................480IV.3 STATE EXAMPLES .......................................................................................................................................480

IV.3.1 Idle Waiting for a Packet to Transmit ..........................................................................................480IV.3.2 Data Ack Pending Waiting for Data Ack only .............................................................................481xi

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface SpecificationsIV.3.3 Grant Pending Waiting for a Grant ............................................................................................ 481IV.3.4 Deferring Determine Proper Transmission Timing & Transmit................................................. 481

IV.4 FUNCTION EXAMPLES ................................................................................................................................ 482IV.4.1 CalcDefer() Determine Defer Amount ........................................................................................ 482IV.4.2 UtilizeGrant() Determine Best Use of a Grant............................................................................ 482IV.4.3 Retry() .............................................................................................................................................. 483

APPENDIX V IGMP EXAMPLE ................................................................................................................ 485

V.1 EVENTS ........................................................................................................................................................ 485V.2 ACTIONS ...................................................................................................................................................... 486

APPENDIX VI UNSOLICITED GRANT SERVICES .............................................................................. 487

VI.1 UNSOLICITED GRANT SERVICE (UGS)....................................................................................................... 487VI.1.1 Introduction...................................................................................................................................... 487VI.1.2 Configuration Parameters ............................................................................................................... 487VI.1.3 Operation ......................................................................................................................................... 487VI.1.4 Jitter ................................................................................................................................................. 488VI.1.5 Synchronization Issues ..................................................................................................................... 488

VI.2 UNSOLICITED GRANT SERVICE WITH ACTIVITY DETECTION (UGS-AD) .................................................. 489VI.2.1 Introduction...................................................................................................................................... 489VI.2.2 MAC Configuration Parameters ...................................................................................................... 489VI.2.3 Operation ......................................................................................................................................... 489VI.2.4 Example............................................................................................................................................ 490VI.2.5 Talk Spurt Grant Burst..................................................................................................................... 491VI.2.6 Admission Considerations................................................................................................................ 492

APPENDIX VII S-CDMA FRAMING ........................................................................................................ 493

VII.1 CODED SUBSYMBOL NUMBERING............................................................................................................. 493VII.2 UNCODED SUBSYMBOL NUMBERING ........................................................................................................ 494VII.3 FRAMER OUTPUT NUMBERING ................................................................................................................. 494VII.4 COMMENTS ............................................................................................................................................... 494

APPENDIX VIII AMBIENT TEMPERATURE AND WIND LOADING EFFECTS ........................... 495

VIII.1 SYNCHRONIZATION TOLERANCES TO PLANT DELAY VARIATIONS ......................................................... 495VIII.2 CHANGE IN PROPAGATION DELAY DUE TO TEMPERATURE CHANGES ................................................... 496

VIII.2.1 Fiber Delay Changes Due to Temperature ................................................................................... 496VIII.2.2 Coaxial Cable Delay Changes Due to Temperature..................................................................... 497VIII.2.3 Delay Change Due to Wind........................................................................................................... 497

VIII.3 REFERENCES ............................................................................................................................................ 497

APPENDIX IX ACKNOWLEDGMENTS .................................................................................................. 499

APPENDIX X REVISIONS .......................................................................................................................... 501

X.1 ECNS INCLUDED IN SP-RFIV2.0-I02-020617 ............................................................................................. 501xii

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210X.2 ECNS INCLUDED IN SP-RFIV2.0-I03-021218..............................................................................................502X.3 ECNS INCLUDED IN SP-RFIV2.0-I04-030730..............................................................................................503X.4 ECNS INCLUDED IN SP-RFIV2.0-I05-040407..............................................................................................504X.5 ECNS INCLUDED IN CM-SP-RFIV2.0-I06-040804 ......................................................................................504X.6 ECNS INCLUDED IN CM-SP-RFIV2.0-I07-041210 ......................................................................................505xiii

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface SpecificationsThis page intentionally left blank.xiv

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210List of FiguresFIGURE 1-1 TRANSPARENT IP TRAFFIC THROUGH THE DATA-OVER-CABLE SYSTEM ..................................2FIGURE 1-2 DATA-OVER-CABLE REFERENCE ARCHITECTURE ......................................................................4FIGURE 5-1 PROTOCOL STACK ON THE RF INTERFACE................................................................................27FIGURE 5-2 DATA FORWARDING THROUGH THE CM AND CMTS...............................................................28FIGURE 5-3 EXAMPLE CONDITION FOR NETWORK LOOPS ...........................................................................29FIGURE 5-4 MAC FORWARDER ....................................................................................................................31FIGURE 6-1 UPSTREAM SIGNAL-PROCESSING SEQUENCE..............................................................................41FIGURE 6-2 TDMA UPSTREAM TRANSMISSION PROCESSING ......................................................................42FIGURE 6-3 S-CDMA UPSTREAM TRANSMISSION PROCESSING ..................................................................43FIGURE 6-4 EXAMPLE FRAME STRUCTURES WITH FLEXIBLE BURST LENGTH MODE..................................45FIGURE 6-5 BYTE INTERLEAVER OPERATION...............................................................................................48FIGURE 6-6 INTERLEAVER OPERATION FOR LAST INTERLEAVER BLOCK

(WITH SHORTENED LAST CODEWORD) .......................................................................................48FIGURE 6-7 SCRAMBLER STRUCTURE...........................................................................................................50FIGURE 6-8 CONVOLUTIONAL ENCODER ......................................................................................................51FIGURE 6-9 REPETITIVE PATTERNS OF BYTE MAPPING TO SYMBOL MAP BITS FOR TCM.............................52FIGURE 6-10 EXAMPLE BYTE TO BIT ASSIGNMENT FOR 64 QAM ..................................................................52FIGURE 6-11 EXAMPLE OF RETURN TO ZERO BITS FOLLOWED BY 0 ...........................................................53FIGURE 6-12 TIMESTAMP SNAPSHOT..............................................................................................................55FIGURE 6-13 MINI-SLOT MAPPING WITH TWO CODES PER MINI-SLOT, 128 ACTIVE CODES.........................57FIGURE 6-14 MINI-SLOT MAPPING WITH THREE CODES PER MINI-SLOT, 126 ACTIVE CODES......................58FIGURE 6-15 S-CDMA AND SPREADER-OFF INTERVALS ...............................................................................60FIGURE 6-16 SUBFRAME STRUCTURE .............................................................................................................62FIGURE 6-17 SYMBOL NUMBERING WITHOUT TCM......................................................................................64FIGURE 6-18 SYMBOL CONSTELLATIONS .......................................................................................................67FIGURE 6-19 QPSK GRAY AND DIFFERENTIAL SYMBOL MAPPING...............................................................68FIGURE 6-20 8QAM SYMBOL MAPPING ........................................................................................................68FIGURE 6-21 16QAM SYMBOL MAPPING ......................................................................................................69FIGURE 6-22 32QAM SYMBOL MAPPING ......................................................................................................69FIGURE 6-23 64QAM SYMBOL MAPPING ......................................................................................................70FIGURE 6-24 QPSK AND 8QAM TCM SYMBOL MAPPING............................................................................70FIGURE 6-25 16QAM AND 32QAM TCM SYMBOL MAPPING.......................................................................71FIGURE 6-26 64QAM AND 128QAM TCM SYMBOL MAPPING.....................................................................71FIGURE 6-27 CODE HOPPING RANDOM NUMBER GENERATOR ......................................................................74FIGURE 6-28 TRANSMIT PRE-EQUALIZER STRUCTURE...................................................................................75FIGURE 6-29 NOMINAL TDMA BURST TIMING .............................................................................................89FIGURE 6-30 WORST-CASE TDMA BURST TIMING .......................................................................................90FIGURE 7-1 EXAMPLE OF INTERLEAVING MPEG PACKETS IN DOWNSTREAM ..........................................107FIGURE 7-2 FORMAT OF AN MPEG PACKET ..............................................................................................107FIGURE 7-3 PACKET FORMAT WHERE A MAC FRAME IMMEDIATELY FOLLOWS THE POINTER_FIELD.....109FIGURE 7-4 PACKET FORMAT WITH MAC FRAME PRECEDED BY STUFFING BYTES .................................109xv

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface SpecificationsFIGURE 7-5 PACKET FORMAT SHOWING MULTIPLE MAC FRAMES IN A SINGLE PACKET ....................... 109FIGURE 7-6 PACKET FORMAT WHERE A MAC FRAME SPANS MULTIPLE PACKETS................................. 110FIGURE 8-1 GENERIC MAC FRAME FORMAT ............................................................................................ 114FIGURE 8-2 UPSTREAM MAC/PMD CONVERGENCE ................................................................................. 115FIGURE 8-3 MAC HEADER FORMAT ......................................................................................................... 116FIGURE 8-4 ETHERNET/802.3 PACKET PDU FORMAT ............................................................................... 118FIGURE 8-5 RESERVED PDU FORMAT ....................................................................................................... 120FIGURE 8-6 TIMING MAC HEADER ........................................................................................................... 121FIGURE 8-7 MANAGEMENT MAC HEADER ............................................................................................... 122FIGURE 8-8 REQUEST FRAME FORMAT...................................................................................................... 123FIGURE 8-9 FRAGMENTATION MAC HEADER FORMAT ............................................................................ 124FIGURE 8-10 CONCATENATION OF MULTIPLE MAC FRAMES ..................................................................... 125FIGURE 8-11 CONCATENATION MAC HEADER FORMAT............................................................................. 125FIGURE 8-12 EXTENDED MAC FORMAT ..................................................................................................... 126FIGURE 8-13 FRAGMENTATION DETAILS ..................................................................................................... 131FIGURE 8-14 MAC HEADER AND MAC MANAGEMENT MESSAGE HEADER FIELDS.................................. 134FIGURE 8-15 FORMAT OF PACKET PDU FOLLOWING THE TIMING HEADER............................................... 136FIGURE 8-16 UPSTREAM CHANNEL DESCRIPTOR ........................................................................................ 137FIGURE 8-17 TOP-LEVEL ENCODING FOR BURST DESCRIPTORS ................................................................. 140FIGURE 8-18 EXAMPLE OF UCD ENCODED TLV DATA.............................................................................. 144FIGURE 8-19 MAP FORMAT ........................................................................................................................ 145FIGURE 8-20 MAP INFORMATION ELEMENT STRUCTURE ........................................................................... 146FIGURE 8-21 PACKET PDU FOLLOWING THE TIMING HEADER................................................................... 148FIGURE 8-22 RANGING RESPONSE ............................................................................................................... 149FIGURE 8-23 GENERALIZED DECISION FEEDBACK EQUALIZATION COEFFICIENTS ..................................... 152FIGURE 8-24 EXAMPLE OF TLV DATA ........................................................................................................ 153FIGURE 8-25 REGISTRATION REQUEST ........................................................................................................ 154FIGURE 8-26 REGISTRATION RESPONSE FORMAT........................................................................................ 156FIGURE 8-27 REGISTRATION ACKNOWLEDGMENT ...................................................................................... 159FIGURE 8-28 UPSTREAM CHANNEL CHANGE REQUEST............................................................................... 160FIGURE 8-29 UPSTREAM CHANNEL CHANGE RESPONSE ............................................................................. 161FIGURE 8-30 DYNAMIC SERVICE ADDITION REQUEST ........................................................................... 161FIGURE 8-31 DYNAMIC SERVICE ADDITION RESPONSE ......................................................................... 163FIGURE 8-32 DYNAMIC SERVICE ADDITION ACKNOWLEDGE................................................................. 165FIGURE 8-33 DYNAMIC SERVICE CHANGE REQUEST ............................................................................. 166FIGURE 8-34 DYNAMIC SERVICE CHANGE RESPONSE............................................................................ 167FIGURE 8-35 DYNAMIC SERVICE CHANGE ACKNOWLEDGE................................................................... 169FIGURE 8-36 DYNAMIC SERVICE DELETION REQUEST........................................................................... 170FIGURE 8-37 DYNAMIC SERVICE DELETION RESPONSE ......................................................................... 171FIGURE 8-38 DYNAMIC CHANNEL CHANGE REQUEST ................................................................................ 171FIGURE 8-39 DYNAMIC CHANNEL CHANGE RESPONSE............................................................................... 178FIGURE 8-40 DYNAMIC CHANNEL CHANGE ACKNOWLEDGE...................................................................... 180FIGURE 8-41 DEVICE CLASS IDENTIFICATION REQUEST ............................................................................. 181xvi

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210FIGURE 8-42 DEVICE CLASS IDENTIFICATION RESPONSE ............................................................................182FIGURE 8-43 UP-DIS MESSAGE FORMAT......................................................................................................183FIGURE 8-44 PACKET PDU FOLLOWING THE TIMING HEADER ...................................................................184FIGURE 8-45 TEST REQUEST.........................................................................................................................186FIGURE 9-1 ALLOCATION MAP...................................................................................................................189FIGURE 9-2 PROTOCOL EXAMPLE...............................................................................................................195FIGURE 9-3 LOGICAL S-CDMA TDMA CHANNELS...................................................................................196FIGURE 10-1 PROVISIONED AUTHORIZATION MODEL ENVELOPES...........................................................207FIGURE 10-2 DYNAMIC AUTHORIZATION MODEL ENVELOPES ................................................................208FIGURE 10-3 CLASSIFICATION WITHIN THE MAC LAYER ............................................................................209FIGURE 10-4 THEORY OF OPERATION OBJECT MODEL ................................................................................211FIGURE 10-5 REGISTRATION MESSAGE FLOW..............................................................................................216FIGURE 10-6 DYNAMIC SERVICE ADDITION MESSAGE FLOW CM INITIATED ........................................218FIGURE 10-7 DYNAMIC SERVICE ADDITION MESSAGE FLOW CMTS INITIATED ...................................219FIGURE 10-8 CM FRAGMENTATION FLOWCHART ........................................................................................226FIGURE 10-9 EXAMPLE OF FRAGMENTING A SINGLE PACKET .....................................................................230FIGURE 10-10 FRAGMENTED CONCATENATED PACKET EXAMPLE ................................................................231FIGURE 10-11 PAYLOAD HEADER SUPPRESSION OPERATION ........................................................................234FIGURE 10-12 PAYLOAD HEADER SUPPRESSION WITH MASKING ..................................................................235FIGURE 10-13 PAYLOAD HEADER SUPPRESSION SIGNALING EXAMPLE ........................................................236FIGURE 10-14 UPSTREAM PAYLOAD HEADER SUPPRESSION EXAMPLE.........................................................237FIGURE 10-15 DOWNSTREAM PAYLOAD HEADER SUPPRESSION EXAMPLE...................................................238FIGURE 11-1 CM INITIALIZATION OVERVIEW..............................................................................................240FIGURE 11-2 SDL NOTATION .......................................................................................................................241FIGURE 11-3 OBTAINING UPSTREAM PARAMETERS .....................................................................................244FIGURE 11-4 MESSAGE FLOWS DURING SCANNING AND UPSTREAM PARAMETER ACQUISITION ...............245FIGURE 11-5 RANGING AND AUTOMATIC ADJUSTMENTS PROCEDURE........................................................246FIGURE 11-6 INITIAL RANGING - CM...........................................................................................................247FIGURE 11-7 UNICAST INITIAL RANGING - CM ...........................................................................................248FIGURE 11-8 INITIAL RANGING - CMTS ......................................................................................................249FIGURE 11-9 DEVICE CLASS IDENTIFICATION ..............................................................................................250FIGURE 11-10 ESTABLISHING IP CONNECTIVITY ...........................................................................................251FIGURE 11-11 ESTABLISHING TIME OF DAY ..................................................................................................252FIGURE 11-12 REGISTRATION CM.............................................................................................................254FIGURE 11-13 WAIT FOR REGISTRATION RESPONSE CM .........................................................................255FIGURE 11-14 REGISTRATION CMTS........................................................................................................257FIGURE 11-15 REGISTRATION ACKNOWLEDGMENT CMTS .......................................................................258FIGURE 11-16 PERIODIC RANGING - CMTS...................................................................................................261FIGURE 11-17 PERIODIC RANGING - CM VIEW..............................................................................................262FIGURE 11-18 CHANGING UPSTREAM CHANNELS: CMTS VIEW...................................................................264FIGURE 11-19 CHANGING UPSTREAM CHANNELS: CM VIEW PART 1...........................................................265FIGURE 11-20 CHANGING UPSTREAM CHANNELS: CM VIEW PART 2...........................................................266FIGURE 11-21 DYNAMIC SERVICE FLOW OVERVIEW.....................................................................................267xvii

CM-SP-RFIv2.0-I07-041210 Data-Over-Cable Service Interface SpecificationsFIGURE 11-22 DYNAMIC SERVICE FLOW STATE TRANSITION DIAGRAM...................................................... 270FIGURE 11-23 DSALOCALLY INITIATED TRANSACTION STATE TRANSITION DIAGRAM .......................... 271FIGURE 11-24 DSAREMOTELY INITIATED TRANSACTION STATE TRANSITION DIAGRAM........................ 272FIGURE 11-25 DSCLOCALLY INITIATED TRANSACTION STATE TRANSITION DIAGRAM .......................... 273FIGURE 11-26 DSCREMOTELY INITIATED TRANSACTION STATE TRANSITION DIAGRAM........................ 274FIGURE 11-27 DSDLOCALLY INITIATED TRANSACTION STATE TRANSITION DIAGRAM .......................... 275FIGURE 11-28 DYNAMIC DELETION (DSD) - REMOTELY INITIATED TRANSACTION STATE

TRANSITION DIAGRAM ........................................................................................................... 276FIGURE 11-29 DYNAMIC SERVICE ADDITION INITIATED FROM CM ............................................................. 277FIGURE 11-30 DYNAMIC SERVICE ADDITION INITIATED FROM CMTS......................................................... 278FIGURE 11-31 DSALOCALLY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM ......................... 279FIGURE 11-32 DSALOCALLY INITIATED TRANSACTION DSA-RSP PENDING STATE FLOW DIAGRAM ... 280FIGURE 11-33 DSALOCALLY INITIATED TRANSACTION HOLDING STATE FLOW DIAGRAM .................... 281FIGURE 11-34 DSALOCALLY INITIATED TRANSACTION RETRIES EXHAUSTED STATE FLOW DIAGRAM . 282FIGURE 11-35 DSALOCALLY INITIATED TRANSACTION DELETING SERVICE FLOW STATE FLOW

DIAGRAM ................................................................................................................................ 283FIGURE 11-36 DSAREMOTELY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM....................... 284FIGURE 11-37 DSAREMOTELY INITIATED TRANSACTION DSA-ACK PENDING STATE FLOW DIAGRAM 285FIGURE 11-38 DSAREMOTELY INITIATED TRANSACTION HOLDING DOWN STATE FLOW DIAGRAM ...... 286FIGURE 11-39 DSAREMOTELY INITIATED TRANSACTION DELETING SERVICE STATE FLOW DIAGRAM.. 287FIGURE 11-40 CM-INITIATED DSC ............................................................................................................... 289FIGURE 11-41 CMTS-INITIATED DSC........................................................................................................... 289FIGURE 11-42 DSCLOCALLY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM ......................... 290FIGURE 11-43 DSCLOCALLY INITIATED TRANSACTION DSC-RSP PENDING STATE FLOW DIAGRAM.... 291FIGURE 11-44 DSCLOCALLY INITIATED TRANSACTION HOLDING DOWN STATE FLOW DIAGRAM ......... 292FIGURE 11-45 DSCLOCALLY INITIATED TRANSACTION RETRIES EXHAUSTED STATE FLOW DIAGRAM . 293FIGURE 11-46 DSCLOCALLY INITIATED TRANSACTION DELETING SERVICE FLOW STATE FLOW

DIAGRAM ................................................................................................................................ 294FIGURE 11-47 DSCREMOTELY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM....................... 295FIGURE 11-48 DSCREMOTELY INITIATED TRANSACTION DSC-ACK PENDING STATE FLOW DIAGRAM 296FIGURE 11-49 DSCREMOTELY INITIATED TRANSACTION HOLDING DOWN STATE FLOW DIAGRAM ...... 297FIGURE 11-50 DSCREMOTELY INITIATED TRANSACTION DELETING SERVICE FLOW STATE FLOW

DIAGRAM ................................................................................................................................ 298FIGURE 11-51 DYNAMIC SERVICE DELETION INITIATED FROM CM ............................................................. 299FIGURE 11-52 DYNAMIC SERVICE DELETION INITIATED FROM CMTS......................................................... 299FIGURE 11-53 DSDLOCALLY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM ......................... 300FIGURE 11-54 DSDLOCALLY INITIATED TRANSACTION DSD-RSP PENDING STATE FLOW DIAGRAM ... 301FIGURE 11-55 DSDLOCALLY INITIATED TRANSACTION HOLDING DOWN STATE FLOW DIAGRAM......... 302FIGURE 11-56 DSDREMOTELY INITIATED TRANSACTION BEGIN STATE FLOW DIAGRAM....................... 303FIGURE 11-57 DSDREMOTELY INITIATED TRANSACTION HOLDING DOWN STATE FLOW DIAGRAM ...... 304FIGURE 11-58 DYNAMICALLY CHANGING CHANNELS: CMTS VIEW PART 1............................................... 311FIGURE 11-59 DYNAMICALLY CHANGING CHANNELS: CMTS VIEW PART 2............................................... 312FIGURE 11-60 DYNAMICALLY CHANGING CHANNELS: CMTS VIEW PART 3............................................... 313FIGURE 11-61 DYNAMICALLY CHANGING CHANNELS: CMTS VIEW PART 4............................................... 314xviii

Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210FIGURE 11-62 DYNAMICALLY CHANGING CHANNELS: CM VIEW PART 1 ....................................................315FIGURE 11-63 DYNAMICALLY CHANGING CHANNELS: CM VIEW PART 2 ....................................................316FIGURE 11-64 DYNAMICALLY CHANGING CHANNELS: CM VIEW PART 3 ....................................................317FIGURE 11-65 DYNAMICALLY CHANGING CHANNELS: CM VIEW PART 4 ....................................................318FIGURE 11-66 DCC EXAMPLE OPERATIONAL FLOW .....................................................................................321FIGURE 11-67 EXAMPLE COMBINING NETWORK 1 ........................................................................................327FIGURE 11-68 EXAMPLE COMBINING NETWORK 2 ........................................................................................329FIGURE D-1 BINARY CONFIGURATION FILE FORMAT .................................................................................393FIGURE D-2 CREATE TLV ENTRIES FOR PARAMETERS REQUIRED BY THE CM.........................................395FIGURE D-3 ADD CM MIC .........................................................................................................................395FIGURE D-4 ADD CMTS MIC.....................................................................................................................395FIGURE D-5 ADD END OF DATA MARKER ..................................................................................................396FIGURE E-1 SPANNING TREE TOPOLOGY....................................................................................................399FIGURE E-2 SPANNING TREE ACROSS CMTSES.........................................................................................400FIGURE F-1 FORMAT OF PACKET PDU FOLLOWING THE TIMING HEADER................................................430FIGURE H-1 DMPI APPLICATION ................................................................................................................440FIGURE H-2 DOWNSTREAM DATA SIGNAL PROTOCOL FOR ITU-T RECOMMENDATIONS J.83

ANNEX A OPERATION .............................................................................................................445FIGURE H-3 DOWNSTREAM DATA SIGNAL PROTOCOL FOR ITU-T RECOMMENDATIONS J.83

ANNEX B OPERATION..............................................................................................................446FIGURE H-4 UPSTREAM DATA PROTOCOL ..................................................................................................446FIGURE H-5 COUNTER SYNCHRONIZATION .................................................................................................447FIGURE H-6 UPSTREAM CONTROL MESSAGE TRANSFER............................................................................448FIGURE H-7 SPI BUS TRANSACTION ...........................................................................................................449FIGURE III-1 SINGLE DOWNSTREAM AND SINGLE UPSTREAM CHANNELS PER CM ....................................474FIGURE III-2 MULTIPLE DOWNSTREAM AND MULTIPLE UPSTREAM CHANNELS PER CM...........................476FIGURE IV-1 TRANSMISSION & DEFERENCE STATE TRANSITION DIAGRAM ...............................................479FIGURE V-1 IGMP SUPPORT CM PASSIVE MODE.....................................................................................485FIGURE VI-1 EXAMPLE JITTER WITH MULTIPLE GRANTS PER SID..............................................................488FIGURE VI-2 VAD START-UP AND STOP .....................................................................................................490xix

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Radio Frequency Interface Specification CM-SP-RFIv2.0-I07-041210List of Tables

TABLE 4-1 ASSUMED DOWNSTREAM RF CHANNEL TRANSMISSION CHARACTERISTICS (SEE NOTE 1)......25TABLE 4-2 ASSUMED UPSTREAM RF CHANNEL TRANSMISSION CHARACTERISTICS (SEE NOTE 1)............26TABLE 6-1 BURST SIZE................................................................................................................................46TABLE 6-2 INTERLEAVER OPERATING PARAMETERS ..................................................................................47TABLE 6-3 I/Q MAPPING .............................................................................................................................65TABLE 6-4 DEFINITION OF DIFFERENTIAL QUADRANT CODING .................................................................66TABLE 6-5 MAXIMUM CHANNEL WIDTH ....................................................................................................76TABLE 6-6 CONSTELLATION GAINS AND POWER LIMITS............................................................................78TABLE 6-7 BURST PROFILE ATTRIBUTES ....................................................................................................84TABLE 6-8 USER UNIQUE BURST PARAMETERS..........................................................................................85TABLE 6-9 SPURIOUS EMISSIONS ................................................................................................................92TABLE 6-10 ADJACENT CHANNEL SPURIOUS EMISSIONS RELATIVE TO THE TRANSMITTED BURST

POWER LEVEL ...........................................................................................................................93TABLE 6-11 SPURIOUS EMISSIONS IN 5 TO 42 MHZ RELATIVE TO THE TRANSMITTED BURST

POWER LEVEL ...........................................................................................................................93TABLE 6-12 FILTER AMPLITUDE DISTORTION...............................................................................................96TABLE 6-13 MAXIMUM RANGE OF COMMANDED NOMINAL RECEIVE POWER IN EACH CARRIER...............98TABLE 6-14 ELECTRICAL OUTPUT FROM CM ..............................................................................