Content for TS 28.062 Word version: 16.0.0
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 Word‑p. 22
5.1 General
5.2 TFO Frames for 16 kbit/s sub-multiplexing
5.2.1 TFO Frames for GSM Full Rate and GSM Enhanced Full Rate
5.2.2 TFO Frames for the Adaptive Multi Rate Family Word‑p. 23
5.2.2.1 TFO Frame Format AMR_TFO_16k
5.2.2.2 TFO Frame Format AMR_TFO_8+8k Word‑p. 26
5.2.2.3 TFO Frame Format AMR_WB_TFO_16k and AMR_WB_TFO_32k Word‑p. 28
5.2.3 Transmission of the bits of 16 kbit/s TFO Frames Word‑p. 30
5.2.3a Transmission of the bits of 32 kbit/s TFO Frames
5.2.4 Transmission of the bits of AMR_TFO_8+8k Frames Word‑p. 31
5.2.5 Optional AMR_TRAU_8+8k Frames
5.3 TFO Frames for 8 kbit/s sub-multiplexing Word‑p. 32
5.4 Void
5.5 Determination of the TFO Frame format Word‑p. 33
5.6 Codec Types in TFO Frames
6 Elementary Procedures for TFO Operation
6.1 Pre-synchronisation of IPEs
6.2 TFO Negotiation Word‑p. 34
6.3 Codec Mismatch Resolution
6.4 TFO Establishment Word‑p. 35
6.5 Codec Optimisation
6.6 TFO Termination Word‑p. 36
6.7 TFO Fast Establishment after Local Handover
7 TFO Messages Word‑p. 37
7.1 Extendibility Word‑p. 39
7.2 Regular and Embedded TFO Messages
7.3 Cyclic Redundancy Check
7.4 TFO_REQ Messages Word‑p. 40
7.4.1 Definition of the SIG_LUC Extension_Block Word‑p. 41
7.4.2 Definition of the Codec_x Extension_Block
7.4.3 Definition of the Codec_List_Extension_Block Word‑p. 42
7.4.4 Definition of the Codec_Attribute_Head Extension_Block
7.4.5 Definition of the TFO_Version Extension_Block Word‑p. 43
7.5 TFO_ACK Messages Word‑p. 44
7.6 TFO_TRANS Messages
7.7 TFO_NORMAL Message
7.8 TFO_FILL Message Word‑p. 45
7.9 TFO_DUP Message
7.10 TFO_SYL Message
7.11 Specification of the TFO Messages
8 Time Alignment of TFO Frames and TFO Messages Word‑p. 51
8.1 Alignment of TFO Frames and TFO Messages for GSM
8.1.1 Time Alignment of TFO Messages in GSM
8.1.2 Time Alignment of TFO Frames to Uplink TRAU Frames
8.1.3 Time Alignment of TFO Frames to Downlink TRAU Frames Word‑p. 52
8.2 Time Alignment of TFO Frames and TFO Messages for 3G Word‑p. 53
9 TFO State Machine Word‑p. 55
9.1 Initialisation Word‑p. 56
9.2 Establishment
9.2.1 First_Try State
9.2.2 Continuous_Retry State Word‑p. 57
9.2.3 Periodic_Retry State
9.2.4 Monitor State
9.2.5 Mismatch State
9.3 Contact State
9.4 Preparation Word‑p. 58
9.5 Operation State
9.6 Local Handover
9.7 Distant Handover, TFO Interruption
9.8 Failure State
10 Detailed Description of the TFO Protocol
10.1 Syntax Used for the TFO_Protocol Description
10.2 Detailed Description of the Conditions
10.2.1 Conditions for TFO_REQ, TFO_ACK, TFO_REQ_L, TFO_ACK_L, New_Local_Codec, New_Local_Config, Distant Config Word‑p. 60
10.2.2 Conditions for TFO_Frame
10.3 Abbreviations, Definitions, Notations used in the TFO_Protocol Description Word‑p. 61
10.4 Detailed Description of the Events Word‑p. 63
10.5 Actions Table Word‑p. 65
10.6 Protocol Tables Word‑p. 68
11 TFO Decision Algorithm Word‑p. 83
11.1 Main TFO Decision Procedure Word‑p. 84
11.2 TFO Decision Algorithm for AMR codec types
11.2.1 Principles
11.2.2 Available Information at Call Set-up Word‑p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision Word‑p. 86
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.3 Immediate TFO Establishment
11.4 FR - HR - Optimisation (only for AMR-NB) Word‑p. 89
11.5 Codec Mode Optimisation
11.6 Codec Type Optimisation and Codec Mismatch Resolution
11.7 Immediate Codec Type Optimisation Word‑p. 91
11.8 TFO Decision Table for AMR-WB
12 Determination of the OACS for AMR-NB Word‑p. 92
12.1 Principles
12.2 Algorithm for OACS Determination
12.2.1 Case 1: No side supports ACS change
12.2.2 Case 2: Only one side supports ACS change Word‑p. 94
12.2.3 Case 3: Both sides support ACS change
12.3 OACS Selection Rules Word‑p. 95
12.3.1 Case 1: No Half Rate Channel is involved
12.3.2 Case 2: A Half Rate Channel is involved Word‑p. 96
12.4 Rules for Contiguous Subset Selection
12.5 Acceptability Rule for the OACS
12.6 FR - HR - Matching
12.7 Contiguity Rule Word‑p. 97
12.8 Examples of OACS Computation
5.1 General
5.2 TFO Frames for 16 kbit/s sub-multiplexing
5.2.1 TFO Frames for GSM Full Rate and GSM Enhanced Full Rate
5.2.2 TFO Frames for the Adaptive Multi Rate Family Word‑p. 23
5.2.2.1 TFO Frame Format AMR_TFO_16k
5.2.2.2 TFO Frame Format AMR_TFO_8+8k Word‑p. 26
5.2.2.3 TFO Frame Format AMR_WB_TFO_16k and AMR_WB_TFO_32k Word‑p. 28
5.2.3 Transmission of the bits of 16 kbit/s TFO Frames Word‑p. 30
5.2.3a Transmission of the bits of 32 kbit/s TFO Frames
5.2.4 Transmission of the bits of AMR_TFO_8+8k Frames Word‑p. 31
5.2.5 Optional AMR_TRAU_8+8k Frames
5.2.2.1 TFO Frame Format AMR_TFO_16k
5.2.2.2 TFO Frame Format AMR_TFO_8+8k Word‑p. 26
5.2.2.3 TFO Frame Format AMR_WB_TFO_16k and AMR_WB_TFO_32k Word‑p. 28
5.2.3a Transmission of the bits of 32 kbit/s TFO Frames
5.2.4 Transmission of the bits of AMR_TFO_8+8k Frames Word‑p. 31
5.2.5 Optional AMR_TRAU_8+8k Frames
5.3 TFO Frames for 8 kbit/s sub-multiplexing Word‑p. 32
5.4 Void
5.5 Determination of the TFO Frame format Word‑p. 33
5.6 Codec Types in TFO Frames
5.6 Codec Types in TFO Frames
6.1 Pre-synchronisation of IPEs
6.2 TFO Negotiation Word‑p. 34
6.3 Codec Mismatch Resolution
6.4 TFO Establishment Word‑p. 35
6.5 Codec Optimisation
6.6 TFO Termination Word‑p. 36
6.7 TFO Fast Establishment after Local Handover
6.5 Codec Optimisation
6.6 TFO Termination Word‑p. 36
6.7 TFO Fast Establishment after Local Handover
7.1 Extendibility Word‑p. 39
7.2 Regular and Embedded TFO Messages
7.3 Cyclic Redundancy Check
7.4 TFO_REQ Messages Word‑p. 40
7.4.1 Definition of the SIG_LUC Extension_Block Word‑p. 41
7.4.2 Definition of the Codec_x Extension_Block
7.4.3 Definition of the Codec_List_Extension_Block Word‑p. 42
7.4.4 Definition of the Codec_Attribute_Head Extension_Block
7.4.5 Definition of the TFO_Version Extension_Block Word‑p. 43
7.5 TFO_ACK Messages Word‑p. 44
7.6 TFO_TRANS Messages
7.7 TFO_NORMAL Message
7.8 TFO_FILL Message Word‑p. 45
7.9 TFO_DUP Message
7.10 TFO_SYL Message
7.11 Specification of the TFO Messages
7.4.1 Definition of the SIG_LUC Extension_Block Word‑p. 41
7.4.2 Definition of the Codec_x Extension_Block
7.4.3 Definition of the Codec_List_Extension_Block Word‑p. 42
7.4.4 Definition of the Codec_Attribute_Head Extension_Block
7.4.5 Definition of the TFO_Version Extension_Block Word‑p. 43
7.4.4 Definition of the Codec_Attribute_Head Extension_Block
7.4.5 Definition of the TFO_Version Extension_Block Word‑p. 43
7.5 TFO_ACK Messages Word‑p. 44
7.6 TFO_TRANS Messages
7.7 TFO_NORMAL Message
7.8 TFO_FILL Message Word‑p. 45
7.9 TFO_DUP Message
7.10 TFO_SYL Message
7.11 Specification of the TFO Messages
7.9 TFO_DUP Message
7.10 TFO_SYL Message
7.11 Specification of the TFO Messages
8 Time Alignment of TFO Frames and TFO Messages Word‑p. 51
8.1 Alignment of TFO Frames and TFO Messages for GSM
8.1.1 Time Alignment of TFO Messages in GSM
8.1.2 Time Alignment of TFO Frames to Uplink TRAU Frames
8.1.3 Time Alignment of TFO Frames to Downlink TRAU Frames Word‑p. 52
8.2 Time Alignment of TFO Frames and TFO Messages for 3G Word‑p. 53
9 TFO State Machine Word‑p. 55
9.1 Initialisation Word‑p. 56
9.2 Establishment
9.2.1 First_Try State
9.2.2 Continuous_Retry State Word‑p. 57
9.2.3 Periodic_Retry State
9.2.4 Monitor State
9.2.5 Mismatch State
9.3 Contact State
9.4 Preparation Word‑p. 58
9.5 Operation State
9.6 Local Handover
9.7 Distant Handover, TFO Interruption
9.8 Failure State
10 Detailed Description of the TFO Protocol
10.1 Syntax Used for the TFO_Protocol Description
10.2 Detailed Description of the Conditions
10.2.1 Conditions for TFO_REQ, TFO_ACK, TFO_REQ_L, TFO_ACK_L, New_Local_Codec, New_Local_Config, Distant Config Word‑p. 60
10.2.2 Conditions for TFO_Frame
10.3 Abbreviations, Definitions, Notations used in the TFO_Protocol Description Word‑p. 61
10.4 Detailed Description of the Events Word‑p. 63
10.5 Actions Table Word‑p. 65
10.6 Protocol Tables Word‑p. 68
11 TFO Decision Algorithm Word‑p. 83
11.1 Main TFO Decision Procedure Word‑p. 84
11.2 TFO Decision Algorithm for AMR codec types
11.2.1 Principles
11.2.2 Available Information at Call Set-up Word‑p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision Word‑p. 86
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.3 Immediate TFO Establishment
11.4 FR - HR - Optimisation (only for AMR-NB) Word‑p. 89
11.5 Codec Mode Optimisation
11.6 Codec Type Optimisation and Codec Mismatch Resolution
11.7 Immediate Codec Type Optimisation Word‑p. 91
11.8 TFO Decision Table for AMR-WB
12 Determination of the OACS for AMR-NB Word‑p. 92
12.1 Principles
12.2 Algorithm for OACS Determination
12.2.1 Case 1: No side supports ACS change
12.2.2 Case 2: Only one side supports ACS change Word‑p. 94
12.2.3 Case 3: Both sides support ACS change
12.3 OACS Selection Rules Word‑p. 95
12.3.1 Case 1: No Half Rate Channel is involved
12.3.2 Case 2: A Half Rate Channel is involved Word‑p. 96
12.4 Rules for Contiguous Subset Selection
12.5 Acceptability Rule for the OACS
12.6 FR - HR - Matching
12.7 Contiguity Rule Word‑p. 97
12.8 Examples of OACS Computation
8.1 Alignment of TFO Frames and TFO Messages for GSM
8.1.1 Time Alignment of TFO Messages in GSM
8.1.2 Time Alignment of TFO Frames to Uplink TRAU Frames
8.1.3 Time Alignment of TFO Frames to Downlink TRAU Frames Word‑p. 52
8.2 Time Alignment of TFO Frames and TFO Messages for 3G Word‑p. 53
9.1 Initialisation Word‑p. 56
9.2 Establishment
9.2.1 First_Try State
9.2.2 Continuous_Retry State Word‑p. 57
9.2.3 Periodic_Retry State
9.2.4 Monitor State
9.2.5 Mismatch State
9.3 Contact State
9.4 Preparation Word‑p. 58
9.5 Operation State
9.6 Local Handover
9.7 Distant Handover, TFO Interruption
9.8 Failure State
9.2.1 First_Try State
9.2.2 Continuous_Retry State Word‑p. 57
9.2.3 Periodic_Retry State
9.2.4 Monitor State
9.2.5 Mismatch State
9.5 Operation State
9.6 Local Handover
9.7 Distant Handover, TFO Interruption
9.8 Failure State
10 Detailed Description of the TFO Protocol
10.1 Syntax Used for the TFO_Protocol Description
10.2 Detailed Description of the Conditions
10.2.1 Conditions for TFO_REQ, TFO_ACK, TFO_REQ_L, TFO_ACK_L, New_Local_Codec, New_Local_Config, Distant Config Word‑p. 60
10.2.2 Conditions for TFO_Frame
10.3 Abbreviations, Definitions, Notations used in the TFO_Protocol Description Word‑p. 61
10.4 Detailed Description of the Events Word‑p. 63
10.5 Actions Table Word‑p. 65
10.6 Protocol Tables Word‑p. 68
10.5 Actions Table Word‑p. 65
10.6 Protocol Tables Word‑p. 68
11 TFO Decision Algorithm Word‑p. 83
11.1 Main TFO Decision Procedure Word‑p. 84
11.2 TFO Decision Algorithm for AMR codec types
11.2.1 Principles
11.2.2 Available Information at Call Set-up Word‑p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision Word‑p. 86
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.3 Immediate TFO Establishment
11.4 FR - HR - Optimisation (only for AMR-NB) Word‑p. 89
11.5 Codec Mode Optimisation
11.6 Codec Type Optimisation and Codec Mismatch Resolution
11.7 Immediate Codec Type Optimisation Word‑p. 91
11.8 TFO Decision Table for AMR-WB
12 Determination of the OACS for AMR-NB Word‑p. 92
12.1 Principles
12.2 Algorithm for OACS Determination
12.2.1 Case 1: No side supports ACS change
12.2.2 Case 2: Only one side supports ACS change Word‑p. 94
12.2.3 Case 3: Both sides support ACS change
12.3 OACS Selection Rules Word‑p. 95
12.3.1 Case 1: No Half Rate Channel is involved
12.3.2 Case 2: A Half Rate Channel is involved Word‑p. 96
12.4 Rules for Contiguous Subset Selection
12.5 Acceptability Rule for the OACS
12.6 FR - HR - Matching
12.7 Contiguity Rule Word‑p. 97
12.8 Examples of OACS Computation
11.1 Main TFO Decision Procedure Word‑p. 84
11.2 TFO Decision Algorithm for AMR codec types
11.2.1 Principles
11.2.2 Available Information at Call Set-up Word‑p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision Word‑p. 86
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.3 Immediate TFO Establishment
11.4 FR - HR - Optimisation (only for AMR-NB) Word‑p. 89
11.5 Codec Mode Optimisation
11.6 Codec Type Optimisation and Codec Mismatch Resolution
11.7 Immediate Codec Type Optimisation Word‑p. 91
11.8 TFO Decision Table for AMR-WB
11.2.1 Principles
11.2.2 Available Information at Call Set-up Word‑p. 85
11.2.3 Void
11.2.4 Flowchart for AMR-NB TFO Decision Word‑p. 86
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.2.5 Annotations to the Flowcharts Word‑p. 88
11.5 Codec Mode Optimisation
11.6 Codec Type Optimisation and Codec Mismatch Resolution
11.7 Immediate Codec Type Optimisation Word‑p. 91
11.8 TFO Decision Table for AMR-WB
12.1 Principles
12.2 Algorithm for OACS Determination
12.2.1 Case 1: No side supports ACS change
12.2.2 Case 2: Only one side supports ACS change Word‑p. 94
12.2.3 Case 3: Both sides support ACS change
12.3 OACS Selection Rules Word‑p. 95
12.3.1 Case 1: No Half Rate Channel is involved
12.3.2 Case 2: A Half Rate Channel is involved Word‑p. 96
12.4 Rules for Contiguous Subset Selection
12.5 Acceptability Rule for the OACS
12.6 FR - HR - Matching
12.7 Contiguity Rule Word‑p. 97
12.8 Examples of OACS Computation
12.3.1 Case 1: No Half Rate Channel is involved
12.3.2 Case 2: A Half Rate Channel is involved Word‑p. 96
12.8 Examples of OACS Computation