1、 ETSI TS 1Digital cellular teleco(3GPP TS 45.0TECHNICAL SPECIFICATION145 009 V13.0.0 (2016communications system (PhaLink adaptation .009 version 13.0.0 Release 13GLOBAL SYSTEMOBILE COMMUN16-01) hase 2+); 13) TEM FOR ICATIONSRETSI ETSI TS 145 009 V13.0.0 (2016-01)13GPP TS 45.009 version 13.0.0 Releas
2、e 13Reference RTS/TSGG-0145009vd00 Keywords GSM 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 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice
3、 The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorizati
4、on of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be awa
5、re that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: ht
6、tps:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not
7、be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the b
8、enefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 145 009 V13.0.0 (2016-01)23GPP TS 45.009 version 13.0.0 Rele
9、ase 13Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Pr
10、operty Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR s
11、earches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been pro
12、duced 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 deliverables. The cross reference b
13、etween 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 interpreted as described in clause
14、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 145 009 V13.0.0 (2016-01)33GPP TS 45.009 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Fore
15、word . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g31.1 References 6g31.2 Abbreviations . 6g32 General . 6g33 Adaptive Multi-Rate inband control and link adaptation . 7g33.1 General operation . 7g33.1.1 Operation without Tandem Free Operation 7g33.1.2 Operation with ongoing Tandem Free Ope
16、ration . 8g33.1.3 Operation at handover with ongoing Tandem Free Operation 8g33.2 Inband Signalling . 8g33.2.1 Frequent inband signalling for AMR codec mode adaptation 9g33.2.1.1 General aspects . 9g33.2.1.2 Operation with DTX enabled 9g33.2.1.3 Transmitter/Receiver Synchronisation 9g33.2.2 Robust i
17、nband signalling for AMR configuration modification . 10g33.2.2.1 General aspects . 10g33.2.2.2 RATSCCH protocol 11g33.2.2.3 RATSCCH messages 12g33.2.2.3.1 ACK_OK message 12g33.2.2.3.2 ACK_ERR message 12g33.2.2.3.3 ACK_UNKNOWN message . 12g33.2.2.3.4 CMI_PHASE_REQ message 13g33.2.2.3.5 AMR_CONFIG_RE
18、Q message . 13g33.2.2.3.6 THRESH_REQ message . 14g33.3 Codec mode adaptation 14g33.3.1 Channel quality measure . 14g33.3.2 Generation of Codec Mode Commands and Requests 15g33.3.3 Performance requirements 15g33.3.3.1 MS response to the Codec Mode Command . 15g33.3.3.2 BTS response to the Codec Mode
19、Request . 15g33.3.3.3 Performance of the Codec Mode Request Generation 16g33.4 Setup procedures 16g33.4.1 Definition of the AMR Active Codec Set . 16g33.4.2 Definition of Codec Mode Command/Request decision thresholds . 16g33.4.3 Initial Codec Mode Selection at Call Setup and Handover . 18g3Annex A
20、(informative): Example Solution for Link quality estimation 19g3Annex B (informative): Example Definition of Mode Command/Request decision thresholds 20g3Annex C (informative): Principles for AMR codec mode adaptation with TFO 22g3C.1 Downgrading 22g3C.1.1 Uplink downgrading . 22g3C.1.2 Downlink dow
21、ngrading 23g3C.2 Upgrading . 24g3C.2.1 Downlink upgrading . 24g3C.2.2 Uplink upgrading 25g3ETSI ETSI TS 145 009 V13.0.0 (2016-01)43GPP TS 45.009 version 13.0.0 Release 13Annex D (informative): Change history . 26g3History 27g3ETSI ETSI TS 145 009 V13.0.0 (2016-01)53GPP TS 45.009 version 13.0.0 Relea
22、se 13Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, i
23、t will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version 8.x.y where: 8 indicates release 1999. x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. y the third
24、 digit is incremented when editorial only changes have been incorporated in the specification. ETSI ETSI TS 145 009 V13.0.0 (2016-01)63GPP TS 45.009 version 13.0.0 Release 131 Scope The requirements described in the present document are mandatory for implementation in all GSM MSs and BSSs capable of
25、 supporting the Adaptive Multi-Rate speech traffic channel, unless otherwise stated. Unless otherwise specified, references to GSM include GSM at any frequency band. 1.1 References The following documents contain provisions which, through reference in this text, constitute provisions of the present
26、document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (in
27、cluding a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 44.018: “Mobile radio interface layer 3 specification, Radio Resource Control Prot
28、ocol“. 3 3GPP TS 45.002: “Multiplexing and multiple access on the radio path“. 4 3GPP TS 45.003: “Channel Coding“. 5 3GPP TS 45.005: “Radio transmission and reception“. 6 3GPP TS 48.008: “Mobile-services Switching Centre - Base Station System (MSC - BSS) interface, Layer 3 specification“. 7 3GPP TS
29、28.062: “Inband Tandem Free Operation (TFO) of Speech Codecs“. 1.2 Abbreviations For the purposes of the present document, the following abbreviations apply. Further GSM related abbreviations are listed in 3GPP TR 21.905. AMR Adaptive Multi-Rate AMR-WB Adaptive Multi-Rate Wideband ACS Active Codec S
30、et CMC Codec Mode Command CMI Codec Mode Indication CMR Codec Mode Request ICM Initial Codec Mode RATSCCH Robust AMR Traffic Synchronized Control Channel 2 General The present document gives the detailed requirements for the correct operation of in call service specific link adaptation and control f
31、or GSM services implemented in GSM Mobile Stations (MS)s and Base Station Systems (BSS)s. In this specification the term AMR refers to both narrow-band and wide-band AMR codecs if not otherwise stated. For the Adaptive Multi-Rate (AMR) speech service, the detailed description and requirements for th
32、e associated inband signaling, AMR codec mode adaptation, and AMR codec configuration are given. ETSI ETSI TS 145 009 V13.0.0 (2016-01)73GPP TS 45.009 version 13.0.0 Release 13An inband signalling channel is defined for AMR which enables the MS and the BTS to exchange messages on applied or requeste
33、d speech and channel codec modes. Codec mode adaptation for AMR is based on received channel quality estimation in both MS and BTS, followed by a decision on the most appropriate speech and channel codec mode to apply at a given time. The overall operation of AMR, in terms of used codec modes as wel
34、l as general adaptation behaviour is controlled by the network. 3 Adaptive Multi-Rate inband control and link adaptation 3.1 General operation 3.1.1 Operation without Tandem Free Operation A high-level block diagram of the complete AMR system is depicted in figure 1. The system consists of the major
35、 components TRAU and BTS on the network side and the MS. On the network side, speech encoder (SPE) and channel encoder (CHE) as well as channel decoder (CHD) and speech decoder (SPD) are connected via the serial A-bis interface. For each link, quality information is derived by estimating the current
36、 channel state. Based on the channel state, and also taking into consideration possible constraints from network control, the codec mode control, which is located on the network side, selects the codec modes to be applied. The channel mode to use (TCH/AFS, TCH/AHS, O-TCH/AHS, TCH/WFS, O-TCH/WFS or O
37、-TCH/WHS) is controlled by the network. Uplink and downlink always apply the same channel mode. For codec mode adaptation the receiving side performs link quality measurements of the incoming link. The measurements are processed yielding a Quality Indicator. For uplink adaptation, the Quality Indica
38、tor is directly fed into the UL mode control unit. This unit compares the Quality Indicator with certain thresholds and generates, also considering possible constraints from network control, a Codec Mode Command indicating the codec mode to be used on the uplink. The Codec Mode Command is then trans
39、mitted inband to the mobile side where the incoming speech signal is encoded in the corresponding codec mode. For downlink adaptation, the DL Mode Request Generator within the mobile compares the DL Quality indicator with certain thresholds and generates a Codec Mode Request indicating the preferred
40、 codec mode for the downlink. The Codec Mode Request is transmitted inband to the network side where it is fed into the DL Mode Control unit. This unit generally grants the requested mode. However, considering possible constraints from network control, it may also override the request. The resulting
41、 codec mode is then applied for encoding of the incoming speech signal in downlink direction. Both for uplink and downlink, the presently applied codec mode is transmitted inband as Codec Mode Indication together with the coded speech data. At the decoder, the Codec Mode Indication is decoded and ap
42、plied for decoding of the received speech data. ETSI ETSI TS 145 009 V13.0.0 (2016-01)83GPP TS 45.009 version 13.0.0 Release 13Figure 1: High level AMR block diagram Codec mode selection is done from a set of codec modes (ACS, Active Codec Set), which may include 1 to 4 AMR codec modes. Associated w
43、ith this set is a list of 1 to 3 switching thresholds and hysteresis used by the DL Mode Request Generator and the UL mode control unit to generate the Codec Mode Requests and Codec Mode Commands. These configuration parameters (ACS, thresholds, hysteresis) are defined at call set-up and can be modi
44、fied at handover or during a call. 3.1.2 Operation with ongoing Tandem Free Operation If tandem free operation is ongoing (see 3GPP TS 28.062) then the speech signal has to be transmitted over two radio links, first uplink (MS1 to BTS1) and then downlink (BTS2 to MS2), respectively symmetrically in
45、the reverse direction. The optimal Codec Mode in direction MS1 to MS2 shall be derived from the Codec Mode Command for the first uplink (CMC1, within BTS1) and the Codec Mode Request derived for the second downlink (CMR2 within MS2) in the following way: MS2 shall send the CMR2 back to BTS2 in the u
46、sual way. BTS2 shall either accept this CMR2 (default) or may modify it according to network control needs: CMR2. Then BTS2 shall send the CMR2 further uplink to its TRAU2, to TRAU1 and downlink to BTS1 (see 3GPP TS 28.062 on how this transmission shall be handled on Abis and A interfaces). BTS1 com
47、bines the received CMR2 with its own derived CMC1 by taking the minimum of both values. If needed, BTS1 may modify this minimum value according to own network control ( CMC1) and shall send it finally downlink to MS1 as CMC. The identical procedure shall be performed in the reverse direction. Annex
48、C gives an informative description. 3.1.3 Operation at handover with ongoing Tandem Free Operation Before and during an handover at one or both sides of the MS-to-MS connection, it may be needed to freeze the codec mode adaptation for a short while, e.g. to optimise the common Active Codec Set, or t
49、o allow fast (re-)synchronisation between BTS and TRAU or to optimise the CMI Phase in downlink. Both BTSs may therefore enable or disable the codec mode adaptation (see 3GPP TS 28.062). As long as the codec mode adaptation is frozen to a specific codec mode, then this codec mode shall be used in both directions as long as tandem free operation is ongoing, or tandem free operation shall be discontinued. The Codec Mode Requests from the MSs may be taken into account to decide whether to continue TFO or not, but not for codec mode adaptation. 3.2 Inband
