ETSI
8.3.7 Contention Access ...................................................................................................................................... 52
8.3.8 Dedicated Return Bearer (High Data Rate) operation ................................................................................ 52
8.4 Transmit Burst Assembly ................................................................................................................................. 52
8.4.0 General ........................................................................................................................................................ 52
8.4.1 Usage of Dedicated Reservation Slots ........................................................................................................ 53
8.4.1.1 Multiplexing of Data and Queue Status Reporting in Dedicated Reservations ..................................... 53
8.4.1.2 DTX Operation ..................................................................................................................................... 55
8.4.1.3 Enhanced ISDN Data Transmission ...................................................................................................... 55
8.4.2 Shared Reservation Access ......................................................................................................................... 56
8.4.2.1 Multiplexing of Data and Queue Reporting information in Shared Reservations ................................. 56
8.4.2.2 DTX operation ...................................................................................................................................... 57
8.4.3 Controlled Random Access ........................................................................................................................ 57
8.4.3.1 General Principles of operation ............................................................................................................. 57
8.4.3.1.0 Overview ......................................................................................................................................... 57
8.4.3.1.1 Initiation of transmission ................................................................................................................. 58
8.4.3.1.2 Continuation of transmission ........................................................................................................... 58
8.4.3.2 Multiplexing of Data and Queue Status Reports in Controlled Random Access .................................. 58
8.4.3.3 Untimed operation of Controlled Random Access ................................................................................ 59
8.4.4 Contention slot usage .................................................................................................................................. 59
8.4.4.1 General Principles of operation ............................................................................................................. 59
8.4.4.2 Contention Slot Usage Backoff mechanisms ........................................................................................ 59
8.4.4.3 Contention Slot Usage in Untimed Access Mode ................................................................................. 60
8.4.4.4 Queue Status Reporting in contention slots .......................................................................................... 61
8.4.4.5 Transmit_Schedule Process (Informational) ......................................................................................... 63
8.4.4.6 Create_slot Process ............................................................................................................................... 63
8.5 Return Link Adaptation .................................................................................................................................... 65
8.5.0 Overview .................................................................................................................................................... 65
8.5.1 General Principles of Operation.................................................................................................................. 65
8.5.1.0 Overview ............................................................................................................................................... 65
8.5.1.1 Basic Operation Principle ..................................................................................................................... 65
8.5.1.2 Bearer Table .......................................................................................................................................... 66
8.5.1.2.1 Bearer Table Usage ......................................................................................................................... 66
8.5.1.2.2 Extensions to Bearer Table Usage for mobile UE classes ............................................................... 68
8.5.1.2.3 Maximum Code Rate Limitations ................................................................................................... 68
8.5.2 Dedicated Reservation and Contention Access Modes ............................................................................... 68
8.5.2.1 Initial Contention Mode Access ............................................................................................................ 68
8.5.2.2 Code rate selection in transmission schedule ........................................................................................ 69
8.5.3 Shared Reservation and Controlled Random Access Mode ........................................................................ 69
8.5.3.0 General .................................................................................................................................................. 69
8.5.3.1 Shared Reservation Access ................................................................................................................... 69
8.5.3.2 Controlled Random Access Return Link Adaptation ............................................................................ 69
8.5.4 Dedicated Return Bearers (High Data Rate Operation) .............................................................................. 70
8.6 Forward Link Adaptation ................................................................................................................................. 70
8.6.1 Shared Access Forward Bearers ................................................................................................................. 70
8.6.1.1 General principles ................................................................................................................................. 70
8.6.1.2 Measuring Forward Link Quality .......................................................................................................... 70
8.6.1.3 C/No Reporting ..................................................................................................................................... 71
8.6.1.4 Code Rate Selection .............................................................................................................................. 71
8.6.1.5 Sleep Mode ........................................................................................................................................... 72
8.6.2 Variable Modulation Index Shared Access Bearers (FR80T2.5X4-5B, FR80T5X4-5B) ........................... 72
8.6.2.1 General principles ................................................................................................................................. 72
8.6.2.2 Signalling of forward link quality reports ............................................................................................. 72
8.6.3 Dedicated Forward Bearers (FR80T2.5X16/32/64, FR80T5X16/32/64).................................................... 72
8.7 Receiver Processing (Bearer_Rx) ..................................................................................................................... 73
8.8 Transmit Processing (Bearer_Tx) ..................................................................................................................... 75
8.8.0 General ........................................................................................................................................................ 75
8.8.1 Dedicated Reservation and Contention Mode Bursts ................................................................................. 75
8.8.1.1 BCtPDU Addressing mechanisms ........................................................................................................ 75
8.8.1.2 CRC generation and Burst Formatting .................................................................................................. 75
8.8.1.3 ISDN Specific Behaviour ...................................................................................................................... 75
8.8.1.4 Physical Layer Parameters .................................................................................................................... 76
8.8.2 Shared Reservation and Controlled Random Access Mode ........................................................................ 76