1、2774442 O45b285 453 = DEUTSCHE NORM Januar1995 v) Europisches zellulares dig i tales Fun kkom m u n i kat ionssystem (Phase 2) - ETS 300531 Diskontinuierlicher Empfang (DRX) im GSM-System Englische Fassung ETS 300531 : 1994 ICs 33.060.50 Deskriptoren: Telekommunikation, Funkdienst, Empfang European
2、digital cellular telecommunications system (phase 2) - Discontinuous Reception (DRX) in the GSM system; English version ETS 300531 : 1994 Die Europische Telekommunikationsnorm ETS 300531 : 1994 hat den Status einer Deutschen Norm. Nationales Vorwort Die vorliegende Norm ist auf der Grundlage der vom
3、 Europischen Institut fr Telekommunika- tionsnormen (ETSI) herausgegebenen Europischen Telekommunikationsnorm ETS 300531, Ausgabe September 1994, “European digital cellular telecommunications system (phase 2) - Discontinuous Reception (DRX) in the GSM system“, verffentlicht worden. Diese Norm enthif
4、 unter Bercksichtigung des DIN-Prsidialbeschlusses 131 983 den englischen Originaltext der vom Technischen Komitee SMG des ETSI erarbeiteten ETS 300531. Fachlich zustndig in Deutschland ist das Komitee 736 “Bewegliche Funkdienste“ der Deutschen Elektrotechnischen Kommission im DIN und VDE (DKE). O D
5、IN Deutsches Institut fur Normung eV. . Jede Art der Vervielfaltigung, auch auszugsweise, Alleinverkauf der Normen durch Beuth Verlag GmbH, 10772 Berlin nur mit Genehmigung des DIN Deutsches Institut fur Normung eV., Berlin. gestattet. Ref. N,: DIN ETS 300531 : 1995-01 Preisgr: 06 VertK-NI: 7 706 r
6、il w O O m v) I+ w z H A il z H A rn DIN3 DIN ETS 300533 75 E 2774442 0456286 39T E ETS 300 531 September 1994 Source: ETSI TC-SMG Reference: GSM 03.1 3 UDC: 621.396.21 Key words: European digital cellular telecommunications system, Global System for Mobile communications (GSM) European digital cell
7、ular telecommunications system (Phase 2); Discontinuous Reception (DRX) in the GSM system (GSM 03.13) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipoiis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
8、Tel.: + 33 92 94 42 O0 - Fax: + 33 93 65 47 16 I European Telecommunications Standards Institute 1994. All rights reserved. No part may be reproduced except as authorised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the information m
9、ay be embodied. DIN3 DIN ETS 300533 95 = 2794442 0456287 226 = Page 2 ETS 300 531:1994 (GSM 03.13 version 4.0.41 I Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accur
10、acy, please write to “ETSI Editing and Standards Approval Dept.” at the address shown on the title page. DIN1 DIN ETS 300531 95 1 2794442 0456288 162-1 Page 3 ETS 300 531:1994 (GSM 03.13 version 4.0.4) Contents Foreword . 5 1 Scope . 7 2 Normative references 7 3 Definitons and abbreviations . 7 4 5
11、MSC functions . 8 6 BSS functions 8 7 MS functions . 8 8 Support via the air interface . 9 9 Operational aspects . 9 History 1 0 Overview of discontinuous reception . 7 i DIN1 DIN ETS 300531 95 2774442 0456287 OT7 Page 4 ETS 300 531:1994 (GSM 03.13 version 4.0.4) Blank page I DIN1 DIN ETS 300531 95
12、m 2794442 045b290 610 Page 5 ETS 300 531:1994 (GSM 03.13 version 4.0.4) Foreword This European Telecommunication Standard (ETSI has been produced by the Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI). This ETS defines the Discontinuo
13、us Reception (DRX) in the GSM system for the European digital cellular telecommunications system (Phase 2). This ETS corresponds to GSM Technical Specification (GSM-TS) GSM 03.1 3 version 4.0.4. The specification from which this ETS has been derived was originally based on CEPT documentation, hence
14、the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules. Reference is made within this ETS to GSM-TSs (NOTE). NOTE: TC-SMG has produced documents which give the technical specifications for the implementation of the European digital cellular telecommunications system.
15、Historically, these documents have been identified as GSM Technical Specifications (GSM-TSs). These TSs may have subsequently become I-ETSs (Phase 11, or ETSs (Phase 21, whilst others may become ETSI Technical Reports (ETRs). GSM-TSs are, for editorial reasons, still referred to in GSM ETSs. DIN3 DI
16、N ETS 300533 95 M 2794442 0456293 757 M Page 6 ETS 300 531:1994 (GSM 03.13 version 4.0.4) Blank page I DIN1 DIN ETS 300531 95 2794442 0456292 693 Page 7 ETS 300 531:1994 IGSM 03.13 version 4.0.41 1 Scope This Technical Specification provides a system wide view of the operation of discontinuous recep
17、tion 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
18、 the air interface which is defined in Technical Specification GSM 05.02. The Technical Specification 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 op
19、erational aspects of the facility. 2 Normative references This ETS incorporates by dated and undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent a
20、mendments to or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. i1 1 i31 i41 i51 GSM O1 .O4 (ETR 100): “European digital cellular telecommunications syst
21、em (Phase 2); Abbreviations and acronyms“. GSM 04.08 (prETS 300 557): “European digital cellular telecommunications system (Phase 2); Mobile radio interface layer 3 specification“. GSM 05.02 (prETS 300 574): “European digital cellular telecommunications system (Phase 2); Multiplexing and multiple ac
22、cess on the radio path“. GSM 08.02 (prETS 300 587-2): “European digital cellular telecommunications system (Phase 2); Base Station System - Mobile- services Switching Centre (BSS - MSC) interface Interface principles“. GSM 08.08 (prETS 300 590): “European digital cellular telecommunications system (
23、Phase 2); Mobile Switching Centre - Base Station System (MSC - BSS) interface Layer 3 specification“. 3 Definitons and abbreviations Abbreviations used in this specification are listed in GSM 01.04. 4 Overview of discontinuous reception DRX is a technique that allows the mobile station to power down
24、 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 decoding va
25、lid page requests transmitted by the network in the idle mode periods. DIN1 DIN ETS 300531 95 D 27944q2 0456293 52T Page 8 ETS 300 531:1994 IGSM 03.13 version 4.0.4) 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
26、both the MS and the BSS. All paging requests to each group are then scheduled and sent at a particular time which is derived from the TDMA frame number in conjunction with the IMSI of the MS and some BCCH transmitted data. Thus both the BSS and the MS know when relevant page requests will be sent an
27、d the MS can power down 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
28、study. 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 (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 par
29、ticular 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 request 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
30、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 altered. 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 fro
31、m the MSC to which cell the page request is destined (Technical Specifications GSM 08.08 and GSM 08.02 refers). The 6% analyses the IMSI in order to 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
32、 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. The scheduling of the page requests is therefore completely controlled by the BSS. The relationship between paging group and TDMA burst, and IMSI and p
33、aging group is given in Technical Specification GSM 05.02. The exact scheduling mechanism used at the BSS is not defined in this Technical Specification. However 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 reduc
34、e missed page requests during system reconfiguration. 7 MS functions The MS shall derive its paging group as defined in Technical Specification 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 04.0
35、8. DIN1 DIN ETS 300533 95 W 2794442 0456294 4bb Page 9 ETS 300 53 1 : 1994 (GSM 03.13 version 4.0.4) 8 Support via the air interface The BCCH and paging channel messages are defined in Technical Specification GSM 04.08. Technical Specification GSM 05.02 defines the algorithms which enable an MS to k
36、now the exact frame and 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. If (referring to Technical Specification GSM 05.02) any of the
37、parameters BS-AG-BLKS RES, BS CC CHANS-COMB, BSCC-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 page requests on the affected cell for the exact duration of one pa
38、ging period (.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 reset to any of the values “normal mode“ or “extended mode“ as required. Page 10 ETS 300 September 1994 History First Edition DIN3 DIN ETS 300533 95 531:1994 (GSM 03.13 version 4.0.4) 2794442 045b295
