1、 ETSI TS 128 062 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Inband Tandem Free Operation (TFO) of speech codecs; Service description; Stage 3 (3GPP TS 28.062 version 15.0.0 Release 15) TECHNICAL SPECIFICATION GLOB
2、AL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TS 128 062 V15.0.0 (2018-07)13GPP TS 28.062 version 15.0.0 Release 15Reference RTS/TSGS-0428062vf00 Keywords GSM,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 0
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9、ogo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 128 062 V15.0.0 (2018-07)23GPP TS 28.062 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The informat
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13、 being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specif
14、ication (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverabl
15、es. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interprete
16、d as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 128 062 V15.0.0 (2018-07)33GPP TS 28.062 version 15.0.0 Release 15Contents Intellectua
17、l Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 10g31 Scope 11g32 References 11g33 Definitions and abbreviations . 12g33.1 Definitions 12g33.2 Abbreviations . 13g34 General Description 15g34.1 Background Information 15g34.2 Principle of TFO Operation 16g34.2.1 Principle for
18、TFO Operation for Narrow-Band speech codec types . 16g34.2.2 Principle for TFO Operation for Wide-Band speech codec types (i.e. AMR-WB) 19g34.3 TFO Standard Version Handling 20g34.4 Document Content 21g35 TFO Frame Structure 22g35.1 General . 22g35.2 TFO Frames for 16 kbit/s sub-multiplexing . 22g35
19、.2.1 TFO Frames for GSM Full Rate and GSM Enhanced Full Rate 22g35.2.2 TFO Frames for the Adaptive Multi Rate Family . 23g35.2.2.1 TFO Frame Format AMR_TFO_16k 23g35.2.2.2 TFO Frame Format AMR_TFO_8+8k 26g35.2.2.3 TFO Frame Format AMR_WB_TFO_16k and AMR_WB_TFO_32k . 28g35.2.3 Transmission of the bit
20、s of 16 kbit/s TFO Frames 30g35.2.3a Transmission of the bits of 32 kbit/s TFO Frames 30g35.2.4 Transmission of the bits of AMR_TFO_8+8k Frames . 31g35.2.5 Optional AMR_TRAU_8+8k Frames . 31g35.3 TFO Frames for 8 kbit/s sub-multiplexing . 32g35.3.1 TFO Frame for the GSM Half Rate 32g35.3.2 Transmiss
21、ion of the bits of 8 kbit/s TFO frames. 32g35.4 Void 33g35.5 Determination of the TFO Frame format . 33g35.6 Codec Types in TFO Frames 33g36 Elementary Procedures for TFO Operation 33g36.1 Pre-synchronisation of IPEs . 33g36.2 TFO Negotiation 33g36.3 Codec Mismatch Resolution. 34g36.4 TFO Establishm
22、ent . 35g36.5 Codec Optimisation 35g36.6 TFO Termination 36g36.7 TFO Fast Establishment after Local Handover 36g37 TFO Messages 37g37.1 Extendibility . 39g37.2 Regular and Embedded TFO Messages 39g37.3 Cyclic Redundancy Check . 39g37.4 TFO_REQ Messages 40g37.4.1 Definition of the SIG_LUC Extension_B
23、lock 41g37.4.2 Definition of the Codec_x Extension_Block 41g37.4.3 Definition of the Codec_List_Extension_Block . 42g37.4.4 Definition of the Codec_Attribute_Head Extension_Block 42g37.4.5 Definition of the TFO_Version Extension_Block 43g3ETSI ETSI TS 128 062 V15.0.0 (2018-07)43GPP TS 28.062 version
24、 15.0.0 Release 157.4.5.1 Selector for Alternative Codecs 43g37.5 TFO_ACK Messages . 44g37.6 TFO_TRANS Messages . 44g37.7 TFO_NORMAL Message 44g37.8 TFO_FILL Message . 44g37.9 TFO_DUP Message . 45g37.10 TFO_SYL Message 45g37.11 Specification of the TFO Messages 45g37.11.1 Codec_Types 45g37.11.2 Code
25、c_List 45g37.11.3 Codec_Type Attributes . 45g37.11.3.1 AMR Codec_Type Attributes . 45g37.11.3.1.1 AMR Active_Codec_Set Attributes 47g37.11.3.1.2 AMR Supported_Codec_Set Attributes 47g37.11.3.1.3 AMR specific Codec_Attribute_Head Extension_Block 48g37.11.3.1.4 AMR-WB specific Codec_Attribute_Head Ext
26、ension_Block . 50g38 Time Alignment of TFO Frames and TFO Messages 51g38.1 Alignment of TFO Frames and TFO Messages for GSM 51g38.1.1 Time Alignment of TFO Messages in GSM . 51g38.1.2 Time Alignment of TFO Frames to Uplink TRAU Frames 51g38.1.3 Time Alignment of TFO Frames to Downlink TRAU Frames .
27、52g38.2 Time Alignment of TFO Frames and TFO Messages for 3G . 53g38.2.1 Time Alignment of TFO Messages in 3G . 53g38.2.2 Time Alignment of TFO Frames to Uplink Iu Frames . 53g38.2.3 Time Alignment of TFO Frames to Downlink Iu Frames 54g39 TFO State Machine 55g39.1 Initialisation 56g39.1.1 Not_Activ
28、e State . 56g39.1.2 Wakeup State 56g39.2 Establishment . 56g39.2.1 First_Try State 56g39.2.2 Continuous_Retry State 56g39.2.3 Periodic_Retry State . 57g39.2.4 Monitor State 57g39.2.5 Mismatch State . 57g39.3 Contact State 57g39.4 Preparation . 57g39.4.1 Wait_RC State 57g39.4.2 Konnect State 58g39.5
29、Operation State . 58g39.6 Local Handover 58g39.6.1 Fast_Try State. 58g39.6.2 Fast_Contact State 58g39.7 Distant Handover, TFO Interruption 58g39.7.1 Sync_Lost State 58g39.7.2 Re_Konnect State . 58g39.7.3 TFO_Term 58g39.8 Failure State 59g310 Detailed Description of the TFO Protocol 59g310.1 Syntax U
30、sed for the TFO_Protocol Description . 59g310.2 Detailed Description of the Conditions 59g310.2.1 Conditions for TFO_REQ, TFO_ACK, TFO_REQ_L, TFO_ACK_L, New_Local_Codec, New_Local_Config, Distant Config . 59g310.2.2 Conditions for TFO_Frame 60g310.3 Abbreviations, Definitions, Notations used in the
31、TFO_Protocol Description 61g310.4 Detailed Description of the Events . 62g310.5 Actions Table . 65g310.6 Protocol Tables . 68g311 TFO Decision Algorithm 83g3ETSI ETSI TS 128 062 V15.0.0 (2018-07)53GPP TS 28.062 version 15.0.0 Release 1511.1 Main TFO Decision Procedure . 84g311.2 TFO Decision Algorit
32、hm for AMR codec types 84g311.2.1 Principles 84g311.2.2 Available Information at Call Set-up 85g311.2.3 Void 86g311.2.4 Flowchart for AMR-NB TFO Decision 86g311.2.5 Annotations to the Flowcharts 88g311.3 Immediate TFO Establishment . 88g311.4 FR HR Optimisation (only for AMR-NB) 89g311.5 Codec Mode
33、Optimisation 89g311.6 Codec Type Optimisation and Codec Mismatch Resolution 89g311.6.1 Procedure 89g311.6.2 Preference List of TFO candidates . 90g311.7 Immediate Codec Type Optimisation . 91g311.8 TFO Decision Table for AMR-WB 91g312 Determination of the OACS for AMR-NB 92g312.1 Principles 92g312.2
34、 Algorithm for OACS Determination 92g312.2.1 Case 1: No side supports ACS change 92g312.2.2 Case 2: Only one side supports ACS change 94g312.2.3 Case 3: Both sides support ACS change . 94g312.3 OACS Selection Rules . 95g312.3.1 Case 1: No Half Rate Channel is involved . 95g312.3.2 Case 2: A Half Rat
35、e Channel is involved . 96g312.4 Rules for Contiguous Subset Selection 96g312.5 Acceptability Rule for the OACS . 96g312.6 FR HR Matching 96g312.7 Contiguity Rule 97g312.8 Examples of OACS Computation 97g312.8.1 TFO between a full rate channel and a half rate channel 97g312.8.2 TFO between two full
36、rate channels with different ACS 97g312.8.3 Full Rate Channel with restricted capabilities 98g312.8.4 Scenario: Full Rate Channel with MACS = 2 . 98g312.8.5 Scenario: AMR codec type with only one supported mode 98g3Annex A (normative): In-band Signalling Protocol: Generic Structure . 99g3A.0 Scope o
37、f Annex A and Annex B 99g3A.1 Generic Structure of Inband Signalling Messages . 99g3A.1.1 Frequency and Order of Bit Transmission . 99g3A.1.2 IS_Header . 100g3A.1.3 IS_Command_Block 100g3A.1.4 IS_Extension_Block(s) . 101g3A.2 Detailed Specification of IS Messages . 101g3A.2.1 IS_REQ Message . 101g3A
38、.2.2 IS_ACK Message . 101g3A.2.3 IS_IPE, IS_TRANS and IS_NORMAL Messages . 102g3A.2.4 IS_FILL Message . 103g3A.2.5 IS_DUP Message 103g3A.2.6 IS_SYL Message 104g3A.3 Keep_Open_Indication . 104g3A.4 Rules for Sending of IS Messages 104g3A.5 System Identification and IS_System_Identification_Block 105g
39、3Annex B (informative): In Path Equipment: Generic Rules and Guidelines 107g3B.1 Types of In Path Equipment . 107g3B.2 IS_Compliant IPEs . 107g3B.2.1 Typical IPEs are IS_Passive . 107g3B.2.2 IS Message_Transparency 108g3ETSI ETSI TS 128 062 V15.0.0 (2018-07)63GPP TS 28.062 version 15.0.0 Release 15B
40、.2.2.1 First IS Message . 108g3B.2.2.2 IS Messages within a Sequence 108g3B.2.2.3 Isolated IS Message 109g3B.2.2.4 Check if IS Message is following . 109g3B.3 IPE State Representation 109g3B.3.1 IPE in Sync_Not_Found . 111g3B.3.2 IPE in Sync_Found . 111g3B.3.3 IPE in Sync_Lost 111g3B.3.4 IPE in Keep
41、_Open_Sync 112g3B.3.5 IPE in Keep_Open_Lost . 112g3B.4 IPE Error Handling . 112g3B.5 IPE Transmission Delay . 112g3B.5.1 IPE Transmission Delay in Normal_Mode 112g3B.5.2 IPE Transmission Delay in Transparent_Mode 113g3B.6 Compliance to IS Messages . 113g3B.6.1 Compliance to IS_REQ and IS_ACK Message
42、s 113g3B.6.2 Compliance to IS_NORMAL Message 113g3B.6.3 Compliance to IS_TRANS_x Messages . 113g3B.6.4 Compliance to IS_TRANS_x_u Messages . 114g3B.6.5 Compliance to IS_FILL Message . 114g3B.6.6 Compliance to IS_DUP Messages 114g3B.6.7 Compliance to IS_SYL Messages 114g3Annex C (normative): Tandem F
43、ree Operation in GSM, including AMR-WB . 116g3C.1 Scope 116g3C.2 Overview 116g3C.2.1 TFO_TRAU . 117g3C.2.2 TFO_BSC . 117g3C.2.3 TFO_BTS . 117g3C.2.4 Modifications of the Codec Type and/or the Codec Configuration 118g3C.3 TFO_TRAU . 119g3C.3.1 Rx_TRAU Process . 120g3C.3.2 Tx_TRAU Process . 121g3C.3.2
44、.1 Downlink Speech Transmission and DTX handling if TFO is ON 122g3C.3.2.1.1 GSM_FR, GSM_EFR and GSM_HR cases 122g3C.3.2.1.2 AMR and AMR-WB cases 123g3C.3.2.2 Synchronisation and Bit Errors in Received TFO Frames 123g3C.3.2.2.1 GSM_FR, GSM_EFR and GSM_HR cases 123g3C.3.2.2.2 AMR and AMR-WB cases 123
45、g3C.3.2.2.2.1 No format conversion 123g3C.3.2.2.2.2 With format conversion . 123g3C.3.2.3 Maximum Rate Control 123g3C.3.3 Tx_TFO Process . 124g3C.3.3.1 Maximum Rate Control 125g3C.3.3.2 Codec Modes outside the allowed Range . 125g3C.3.4 Rx_TFO Process 125g3C.3.4.1 Search for and Monitoring of TFO Sy
46、nchronization 125g3C.3.4.2 Errors in TFO Messages and TFO Frames . 126g3C.3.5 TFO_Protocol Process 127g3C.3.5.1 Messages from Rx_TRAU or local BSS. 128g3C.3.5.2 Messages to Tx_TRAU 128g3C.3.5.3 Optional Messages to the local BSC . 129g3C.3.5.4 Messages to Tx_TFO 129g3C.3.5.5 Messages from Rx_TFO . 1
47、29g3C.4 TFO_BTS . 130g3C.4.1 TFO_States and Transitions . 130g3C.4.2 Handling of downlink DTX in TFO . 132g3ETSI ETSI TS 128 062 V15.0.0 (2018-07)73GPP TS 28.062 version 15.0.0 Release 15C.4.3 Handling of Errors in Configuration Parameters 132g3C.4.4 Procedures for Round Trip Delay Measurements 132g
48、3C.5 TFO_BSC . 132g3C.5.1 Resolution of Codec Type Mismatch and Codec Type Optimization 132g3C.5.2 Role of the BSC for AMR and AMR-WB TFO . 133g3C.5.2.1 Configuration of the AMR and AMR-WB speech service. 133g3C.5.2.2 Determination and Establishment of the Common ACS 133g3C.5.2.3 Handovers and the A
49、MR TFO 134g3C.6 The Dialogue between TFO_TRAU and TFO_BTS 134g3C.6.1 Configuration Parameters in AMR-NB TRAU/TFO frames 134g3C.6.1.1 Configuration Protocol Format . 134g3C.6.1.2 Config_Prot field 135g3C.6.1.3 Message_No Field 135g3C.6.1.4 Configuration Parameters Fields . 135g3C.6.1.5 Mapping of the Configuration Parameters on 16 and 8 kbit/s TRAU/TFO frames for AMR Configuration 136g3C.6.2 TFO and Handover Status of the Connection . 138g3C.6.2.1 TFO Status Messages 138g3C.6.2.2 Notification of Status of Connection 138g3C.7 The Dialogue between TFO_BTS and TFO_BSC .
