ETSI TS 145 009-2017 Digital cellular telecommunications system (Phase 2+) (GSM) GSM EDGE Link adaptation (V14 0 0 3GPP TS 45 009 version 14 0 0 Release 14)《数字蜂窝通信系统(第2+阶段)(GSM全球移动.pdf

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1、 ETSI TS 145 009 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); GSM/EDGE Link adaptation (3GPP TS 45.009 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TS 145 009 V14.0.0 (2017-04)13GPP TS 45.009 version 14.0.0 Rel

2、ease 14Reference RTS/TSGR-0645009ve00 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 not

3、ice 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 authoriz

4、ation 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

5、aware 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 https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following

6、 services: https:/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 versi

7、on shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registe

8、red for the benefit 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 V14.0.0 (2017-04)23GPP TS 45.009 versio

9、n 14.0.0 Release 14Intellectual 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: “In

10、tellectual Property 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, in

11、cluding IPR searches, 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)

12、 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 deliverables. The cros

13、s 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 interpreted as describ

14、ed 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 145 009 V14.0.0 (2017-04)33GPP TS 45.009 version 14.0.0 Release 14Contents Intellectual Property R

15、ights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g31.1 References 5g31.2 Abbreviations . 5g32 General . 5g33 Adaptive Multi-Rate inband control and link adaptation . 6g33.1 General operation . 6g33.1.1 Operation without Tandem Free Operation 6g33.1.2 Operation with ongoing Ta

16、ndem Free Operation . 7g33.1.3 Operation at handover with ongoing Tandem Free Operation 7g33.2 Inband Signalling . 7g33.2.1 Frequent inband signalling for AMR codec mode adaptation 8g33.2.1.1 General aspects . 8g33.2.1.2 Operation with DTX enabled 8g33.2.1.3 Transmitter/Receiver Synchronisation 8g33

17、.2.2 Robust inband signalling for AMR configuration modification . 9g33.2.2.1 General aspects . 9g33.2.2.2 RATSCCH protocol 10g33.2.2.3 RATSCCH messages 11g33.2.2.3.1 ACK_OK message 11g33.2.2.3.2 ACK_ERR message 11g33.2.2.3.3 ACK_UNKNOWN message . 11g33.2.2.3.4 CMI_PHASE_REQ message 12g33.2.2.3.5 AM

18、R_CONFIG_REQ message . 12g33.2.2.3.6 THRESH_REQ message . 13g33.3 Codec mode adaptation 13g33.3.1 Channel quality measure . 13g33.3.2 Generation of Codec Mode Commands and Requests 14g33.3.3 Performance requirements 14g33.3.3.1 MS response to the Codec Mode Command . 14g33.3.3.2 BTS response to the

19、Codec Mode Request . 14g33.3.3.3 Performance of the Codec Mode Request Generation 15g33.4 Setup procedures 15g33.4.1 Definition of the AMR Active Codec Set . 15g33.4.2 Definition of Codec Mode Command/Request decision thresholds . 15g33.4.3 Initial Codec Mode Selection at Call Setup and Handover . 1

20、7g3Annex A (informative): Example Solution for Link quality estimation 18g3Annex B (informative): Example Definition of Mode Command/Request decision thresholds 19g3Annex C (informative): Principles for AMR codec mode adaptation with TFO 21g3C.1 Downgrading 21g3C.1.1 Uplink downgrading . 21g3C.1.2 D

21、ownlink downgrading 22g3C.2 Upgrading . 22g3C.2.1 Downlink upgrading . 22g3C.2.2 Uplink upgrading 23g3Annex D (informative): Change history . 25g3History 27g3ETSI ETSI TS 145 009 V14.0.0 (2017-04)43GPP TS 45.009 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the

22、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, it will be re-released by the TSG with an identifying change of relea

23、se 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 digit is incremented when editorial only changes have been incorpor

24、ated in the specification. ETSI ETSI TS 145 009 V14.0.0 (2017-04)53GPP TS 45.009 version 14.0.0 Release 141 Scope The requirements described in the present document are mandatory for implementation in all GSM MSs and BSSs capable of supporting the Adaptive Multi-Rate speech traffic channel, unless o

25、therwise 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 document. References are either specific (identified by date of publ

26、ication, 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 (including a GSM document), a non-specific reference implicitly refers

27、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 Protocol“. 3 3GPP TS 45.002: “Multiplexing and multiple access on the ra

28、dio 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 28.062: “Inband Tandem Free Operation (TFO) of Speech Codecs“. 1.2 A

29、bbreviations 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 Set CMC Codec Mode Command CMI Codec Mode Indication CMR Codec Mode R

30、equest 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 for GSM services implemented in GSM Mobile Stations (MS)s and Base St

31、ation 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 the associated inband signaling, AMR codec mode adaptation, and AMR co

32、dec configuration are given. ETSI ETSI TS 145 009 V14.0.0 (2017-04)63GPP TS 45.009 version 14.0.0 Release 14An inband signalling channel is defined for AMR which enables the MS and the BTS to exchange messages on applied or requested speech and channel codec modes. Codec mode adaptation for AMR is b

33、ased 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 well as general adaptation behaviour is controlled by the network. 3 Ad

34、aptive 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 components TRAU and BTS on the network side and the MS. On the netw

35、ork 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 channel state. Based on the channel state, and also taking into con

36、sideration 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-TCH/WHS) is controlled by the network. Uplink and downlink always a

37、pply 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 Indicator is directly fed into the UL mode control unit. This unit compare

38、s 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 transmitted inband to the mobile side where the incoming speech signal is

39、 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 codec mode for the downlink. The Codec Mode Request is transmitted

40、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 codec mode is then applied for encoding of the incoming speech sign

41、al 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 applied for decoding of the received speech data. ETSI ETSI TS 145 009

42、 V14.0.0 (2017-04)73GPP TS 45.009 version 14.0.0 Release 14Figure 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 with this set is a list of 1 to 3 switching thresholds and hysteresis

43、 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 modified at handover or during a call. 3.1.2 Operation with ongoing Tand

44、em 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 the reverse direction. The optimal Codec Mode in direction MS1 to MS

45、2 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 usual way. BTS2 shall either accept this CMR2 (default) or may modify

46、 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 combines the received CMR2 with its own derived CMC1 by taking the mini

47、mum 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 C gives an informative description. 3.1.3 Operation at handover with

48、 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 to allow fast (re-)synchronisation between BTS and TRAU or to optimis

49、e 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 Signalling The AMR inband signalling consists of two parts: - Frequ