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4‑5x
Content for
TS 28.062
Word version: 16.0.0
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4…
5…
A…
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
5.3.1
TFO Frame for the GSM Half Rate
5.3.2
Transmission of the bits of 8 kbit/s TFO frames
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
7.4.5.1
Selector for Alternative Codecs
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
7.11.1
Codec_Types
7.11.2
Codec_List
7.11.3
Codec_Type Attributes
7.11.3.1
AMR Codec_Type Attributes
Word‑p. 46
7.11.3.1.1
AMR Active_Codec_Set Attributes
Word‑p. 47
7.11.3.1.2
AMR Supported_Codec_Set Attributes
7.11.3.1.3
AMR specific Codec_Attribute_Head Extension_Block
Word‑p. 48
7.11.3.1.4
AMR-WB specific Codec_Attribute_Head Extension_Block
Word‑p. 50
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
8.2.1
Time Alignment of TFO Messages in 3G
8.2.2
Time Alignment of TFO Frames to Uplink Iu Frames
Word‑p. 54
8.2.3
Time Alignment of TFO Frames to Downlink Iu Frames
9
TFO State Machine
Word‑p. 55
9.1
Initialisation
Word‑p. 56
9.1.1
Not_Active State
9.1.2
Wakeup State
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
9.4.1
Wait_RC State
9.4.2
Konnect State
9.5
Operation State
9.6
Local Handover
9.6.1
Fast_Try State
9.6.2
Fast_Contact State
9.7
Distant Handover, TFO Interruption
9.7.1
Sync_Lost State
9.7.2
Re_Konnect State
Word‑p. 59
9.7.3
TFO_Term
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
11.6.1
Procedure
11.6.2
Preference List of TFO candidates
Word‑p. 90
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
12.8.1
TFO between a full rate channel and a half rate channel
12.8.2
TFO between two full rate channels with different ACS
12.8.3
Full Rate Channel with restricted capabilities
Word‑p. 98
12.8.4
Scenario: Full Rate Channel with MACS == 2
12.8.5
Scenario: AMR codec type with only one supported mode