ETSI TS 143 013-2017 Digital cellular telecommunications system (Phase 2+) (GSM) Discontinuous Reception (DRX) in the GSM system (V14 0 0 3GPP TS 43 013 version 14 0 0 Release 14)《.pdf

1、 ETSI TS 143 013 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Discontinuous Reception (DRX) in the GSM system (3GPP TS 43.013 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TS 143 013 V14.0.0 (2017-04)13GPP TS 43

2、.013 version 14.0.0 Release 14Reference RTS/TSGR-0643013ve00 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)

3、N 7803/88 Important notice 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

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9、e GSM Association. ETSI ETSI TS 143 013 V14.0.0 (2017-04)23GPP TS 43.013 version 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 avail

10、able for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual 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 serve

11、r (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including 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

12、, essential to the present document. Foreword This Technical Specification (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 i

13、nterpreted as being references to the corresponding ETSI deliverables. 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“, “nee

14、d not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted 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 143 013 V14.0.0 (20

15、17-04)33GPP TS 43.013 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Abbreviations . 5g34 Overview of discontinuous reception . 6g35 MSC functions 6g36 BSS functions . 6g37 MS functions 7g38 Suppor

16、t via the air interface . 7g39 Operational aspects. 7g310 SGSN functions 7g3Annex A (informative): Change History 8g3History 9g3ETSI ETSI TS 143 013 V14.0.0 (2017-04)43GPP TS 43.013 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Proj

17、ect (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 release date and an increase in ver

18、sion number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, correct

19、ions, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 143 013 V14.0.0 (2017-04)53GPP TS 43.013 version 14.0.0 Release 141 Scope The present document provides a system wide view of the operation of discontinuous reception

20、 on the GSM system. The support of DRX is mandatory in GSM PLMNs. The detailed coding and procedural details are defined in the relevant Technical Specifications dealing with the specific interfaces that are involved, for instance GSM 08.08 and GSM 04.08. Reference is also made to the framing on the

21、 air interface which is defined in Technical Specification GSM 05.02. The present document gives an overview of the implementation of discontinuous reception DRX within the GSM system, the actions required at MSC, BSS, and MS, the support of the facility via the air interface, and some operational a

22、spects of the facility. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. The following documents contain provisions which, through reference in this text, constitute provisions of the present document. Refer

23、ences 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 (including a GSM d

24、ocument), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 GSM 01.04: “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. 2 GSM 04.08: “Digital cellular telecommunications system (Phase 2

25、+); Mobile radio interface layer 3 specification“. 3 GSM 05.02: “Digital cellular telecommunications system (Phase 2+); Multiplexing and multiple access on the radio path“. 4 GSM 08.02: “Digital cellular telecommunications system (Phase 2+); Base Station System - Mobile-services Switching Centre (BS

26、S - MSC) interface Interface principles“. 5 GSM 08.08: “Digital cellular telecommunications system (Phase 2+); Mobile Switching Centre - Base Station System (MSC - BSS) interface Layer 3 specification“. 6 GSM 03.68: “Digital cellular telecommunications system (Phase 2+); Voice Group Call Service (VG

27、CS) Stage 2“. 7 GSM 03.69: “Digital cellular telecommunications system (Phase 2+); Voice Broadcast Service (VBS) Stage 2“. 8 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 9 3GPP TS 45.002: “Technical Specification Group GSM/EDGE Radio Access Network; Multiplexing and multiple access on the r

28、adio path” 3 Abbreviations Abbreviations used in the present document are listed in GSM 01.04 1 and in 3GPP TS 21.905 8. ETSI ETSI TS 143 013 V14.0.0 (2017-04)63GPP TS 43.013 version 14.0.0 Release 144 Overview of discontinuous reception DRX/eDRX is a technique that allows the mobile station to powe

29、r down significant amounts of its internal circuitry for a high percentage of the time when it is in the idle mode. It also ensures that the MS is aware of exactly when page requests for it may be transmitted and it can then therefore schedule other tasks such that it avoids the problem of not decod

30、ing valid page requests transmitted by the network in the idle mode periods. The technique works by dividing the MSs within a cell into a set of groups. The group in which an MS resides is then known locally at both the MS and the BSS. All paging requests to each group are then scheduled and sent at

31、 a particular time which is derived from the TDMA frame number in conjunction with the IMSI of the MS and some BCCH transmitted data. When a MS uses eDRX the BSS derives the precise paging time applicable to the radio interface using IMSI and the eDRX cycle length information provided within a pagin

32、g request (received from the SGSN) and, when paging on PCH, some BCCH data. In addition, for an EC-EGPRS MS, when paging on EC-PCH, the downlink coverage class is also included in the paging request. Thus both the BSS and the MS know when relevant page requests will be sent and the MS can power down

33、 for the period when it knows that page requests will not occur. The page request can contain the IMSI and may contain the TMSI in order to identify the MS concerned. The IMSI is however always used to identify the paging population. Paging by means of the IMEI is for further study. Mechanisms for t

34、he application of DRX for the voice group call and voice broadcast services are defined in stage 2 descriptions in GSM 03.68 6 and GSM 03.69 7, respectively. 5 MSC functions The MSC is almost transparent to DRX, since it has no real time knowledge of the absolute frame numbers on the air interface (

35、refer to Technical Specification GSM 08.02). It should be noted, however, that the MSC does define which cells are to be paged in order to locate a particular MS. Normally this will be a location area. The MSC therefore constructs page requests and sends them to a specific set of BSSs. Each page req

36、uest always includes the IMSI. The timer to detect non receipt of a page response may require alteration depending upon the number of page groups that are involved. If this is the case, then the timer will be set by O and M command at the same time as the number of paging groups at the cell is alter

37、ed. 6 BSS functions At the BSS page requests are received. It is implicit (single cell BSSs) or explicit (multi cell BSSs) within the page requests from the MSC to which cell the page request is destined (Technical Specifications GSM 08.08 and GSM 08.02 refers). The BSS analyses the IMSI in order to

38、 derive the page group of the MS involved. The air interface page request is then constructed and transmitted in the appropriate TDMA burst. If the page request includes a TMSI and IMSI then the IMSI is used to derive the page population and the TMSI is inserted into the actual page request message.

39、 The scheduling of the page requests is therefore completely controlled by the BSS. The relationship between paging group and TDMA burst, and IMSI and paging group is given in Technical Specification 3GPP TS 45.002 9. The exact scheduling mechanism used at the BSS is not defined in the present docum

40、ent. However, when DRX is used the BSS may set the “page mode“ bits as described in Technical Specification GSM 04.08. This can be used to optimise paging load and reduce missed page requests during system reconfiguration. An exception case is when EC-EGPRS is used in which case paging load can be o

41、ptimized and missed pages can be reduced using “paging extension” information sent within EC-AGCH and EC-PCH messages (see 3GPP TS 44.018). ETSI ETSI TS 143 013 V14.0.0 (2017-04)73GPP TS 43.013 version 14.0.0 Release 147 MS functions The MS shall derive its paging group as defined in Technical Speci

42、fication GSM 05.02. The MS shall interpret all paging requests in its paging group according to the paging mode bits as described in Technical Specification GSM 04.08. 8 Support via the air interface The BCCH and paging channel messages are defined in Technical Specification GSM 04.08. Technical Spe

43、cification GSM 05.02 defines the algorithms which enable an MS to know the exact frame and burst when page requests relevant to it might be transmitted. 9 Operational aspects There will be occasions when it is necessary to alter the parameters of cell such that the paging group of the MS may alter.

44、If (referring to Technical Specification GSM 05.02) any of the parameters BS_AG_BLKS_RES, BS_CC_CHANS_COMB, BS_CC_CHANS or BS_PA_MFRMS have to be altered, then the period when page requests may be lost can be minimised for example by: Firstly setting the page mode to “page reorganisation“ in all pag

45、e requests on the affected cell for the exact duration of one paging period (i.e. BS_PA_MFRMS multiframes). At the completion of this announcement period, the BCCH parameters are set to the new values and the BSS starts scheduling the paging messages according to the new parameters. The page mode is

46、 reset to any of the values “normal mode“ or “extended mode“ as required. 10 SGSN functions The SGSN maintains knowledge of the cells that are to be paged, and when the paging group occurs in the respective cell(s), in order to locate a particular MS for packet data delivery. In addition, when eDRX

47、is used the SGSN maintains the value of the eDRX value it has negotiated with the MS. The SGSN constructs paging requests and sends them to a specific set of BSSs. Each page request always includes the IMSI. If a MS uses eDRX then the page request also includes the negotiated eDRX value. If EC-EGPRS

48、 is used, the downlink coverage class applicable to the MS is also included in the page request. ETSI ETSI TS 143 013 V14.0.0 (2017-04)83GPP TS 43.013 version 14.0.0 Release 14Annex A (informative): Change History Change history SMG No. TDoc. No. CR. No. Section affected New version Subject/Comments

49、 SMG#07 4.0.4 ETSI Publication SMG#17 5.0.0 Release 1996 version SMG#27 6.0.0 Release 1997 version SMG#29 7.0.0 Release 1998 version SMG#31 8.0.0 Release 1999 version Change history Date TSG GERAN# TSG Doc. CR Rev Subject/Comment Old New 2001-04 4 Release 4 version 4.0.0 2002-06 10 Release 5 version 4.0.0 5.0.0 2005-01 23 Release 6 version 5.0.0 6.0.0 2007-08 35 Release 7 version 6.0.0 7.0.0 2008-12 40 Release 8 version 7.0.0 8.0.0 2009-12 44 Release 9 version 8.0.0 9.0.0 2011-03 49 Release 10 version 9.0.0 10.0.0 2012-09 55 Rele