Content for TS 28.062 Word version: 18.0.0
5 TFO Frame Structure
6 Elementary Procedures for TFO Operation
7 TFO Messages
8 Time Alignment of TFO Frames and TFO Messages
9 TFO State Machine
10 Detailed Description of the TFO Protocol
11 TFO Decision Algorithm
12 Determination of the OACS for AMR-NB
5 TFO Frame Structure p. 22
5.1 General p. 22
5.2 TFO Frames for 16 kbit/s sub-multiplexing p. 22
5.2.1 TFO Frames for GSM Full Rate and GSM Enhanced Full Rate p. 22
5.2.2 TFO Frames for the Adaptive Multi Rate Family p. 23
5.2.2.1 TFO Frame Format AMR_TFO_16k p. 23
5.2.2.2 TFO Frame Format AMR_TFO_8+8k p. 26
5.2.2.3 TFO Frame Format AMR_WB_TFO_16k and AMR_WB_TFO_32k p. 28
5.2.3 Transmission of the bits of 16 kbit/s TFO Frames p. 30
5.2.3a Transmission of the bits of 32 kbit/s TFO Frames p. 30
5.2.4 Transmission of the bits of AMR_TFO_8+8k Frames p. 31
5.2.5 Optional AMR_TRAU_8+8k Frames p. 31
5.3 TFO Frames for 8 kbit/s sub-multiplexing p. 32
5.3.1 TFO Frame for the GSM Half Rate p. 32
5.3.2 Transmission of the bits of 8 kbit/s TFO frames p. 32
5.4 Void
5.5 Determination of the TFO Frame format p. 33
5.6 Codec Types in TFO Frames p. 33
6 Elementary Procedures for TFO Operation p. 33
6.1 Pre-synchronisation of IPEs p. 33
6.2 TFO Negotiation p. 34
6.3 Codec Mismatch Resolution p. 34
6.4 TFO Establishment p. 35
6.5 Codec Optimisation p. 35
6.6 TFO Termination p. 36
6.7 TFO Fast Establishment after Local Handover p. 36
7 TFO Messages p. 37
7.1 Extendibility p. 39
7.2 Regular and Embedded TFO Messages p. 39
7.3 Cyclic Redundancy Check p. 39
7.4 TFO_REQ Messages p. 40
7.4.1 Definition of the SIG_LUC Extension_Block p. 41
7.4.2 Definition of the Codec_x Extension_Block p. 41
7.4.3 Definition of the Codec_List_Extension_Block p. 42
7.4.4 Definition of the Codec_Attribute_Head Extension_Block p. 42
7.4.5 Definition of the TFO_Version Extension_Block p. 43
7.5 TFO_ACK Messages p. 44
7.6 TFO_TRANS Messages p. 44
7.7 TFO_NORMAL Message p. 44
7.8 TFO_FILL Message p. 45
7.9 TFO_DUP Message p. 45
7.10 TFO_SYL Message p. 45
7.11 Specification of the TFO Messages p. 45
8 Time Alignment of TFO Frames and TFO Messages p. 51
8.1 Alignment of TFO Frames and TFO Messages for GSM p. 51
8.1.1 Time Alignment of TFO Messages in GSM p. 51
8.1.2 Time Alignment of TFO Frames to Uplink TRAU Frames p. 51
8.1.3 Time Alignment of TFO Frames to Downlink TRAU Frames p. 52
8.2 Time Alignment of TFO Frames and TFO Messages for 3G p. 53
9 TFO State Machine p. 55
9.1 Initialisation p. 56
9.1.1 Not_Active State p. 56
9.1.2 Wakeup State p. 56
9.2 Establishment p. 56
9.2.1 First_Try State p. 56
9.2.2 Continuous_Retry State p. 57
9.2.3 Periodic_Retry State p. 57
9.2.4 Monitor State p. 57
9.2.5 Mismatch State p. 57
9.3 Contact State p. 57
9.4 Preparation p. 58
9.4.1 Wait_RC State p. 58
9.4.2 Konnect State p. 58
9.5 Operation State p. 58
9.6 Local Handover p. 58
9.6.1 Fast_Try State p. 58
9.6.2 Fast_Contact State p. 58
9.7 Distant Handover, TFO Interruption p. 58
9.8 Failure State p. 59
10 Detailed Description of the TFO Protocol p. 59
10.1 Syntax Used for the TFO_Protocol Description p. 59
10.2 Detailed Description of the Conditions p. 59
10.2.1 Conditions for TFO_REQ, TFO_ACK, TFO_REQ_L, TFO_ACK_L, New_Local_Codec, New_Local_Config, Distant Config p. 60
10.2.2 Conditions for TFO_Frame p. 60
10.3 Abbreviations, Definitions, Notations used in the TFO_Protocol Description p. 61
10.4 Detailed Description of the Events p. 63
10.5 Actions Table p. 65
10.6 Protocol Tables p. 68
11 TFO Decision Algorithm p. 83
11.1 Main TFO Decision Procedure p. 84
11.2 TFO Decision Algorithm for AMR codec types p. 84
11.2.1 Principles p. 84
11.2.2 Available Information at Call Set-up p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision p. 86
11.2.5 Annotations to the Flowcharts p. 88
11.3 Immediate TFO Establishment p. 88
11.4 FR - HR - Optimisation (only for AMR-NB) p. 89
11.5 Codec Mode Optimisation p. 89
11.6 Codec Type Optimisation and Codec Mismatch Resolution p. 89
11.7 Immediate Codec Type Optimisation p. 91
11.8 TFO Decision Table for AMR-WB p. 91
12 Determination of the OACS for AMR-NB p. 92
12.1 Principles p. 92
12.2 Algorithm for OACS Determination p. 92
12.2.1 Case 1: No side supports ACS change p. 92
12.2.2 Case 2: Only one side supports ACS change p. 94
12.2.3 Case 3: Both sides support ACS change p. 94
12.3 OACS Selection Rules p. 95
12.3.1 Case 1: No Half Rate Channel is involved p. 95
12.3.2 Case 2: A Half Rate Channel is involved p. 96
12.4 Rules for Contiguous Subset Selection p. 96
12.5 Acceptability Rule for the OACS p. 96
12.6 FR - HR - Matching p. 96
12.7 Contiguity Rule p. 97
12.8 Examples of OACS Computation p. 97
12.8.1 TFO between a full rate channel and a half rate channel p. 97
12.8.2 TFO between two full rate channels with different ACS p. 97
12.8.3 Full Rate Channel with restricted capabilities p. 98
12.8.4 Scenario: Full Rate Channel with MACS == 2 p. 98
12.8.5 Scenario: AMR codec type with only one supported mode p. 98
