1、ETSI TR 121 91 O V3.0.0 (2000-07) Technical Report Universal Mobile Telecommunications System (UNITS); Multi-mode User Equipment (UE) issues; Categories principles and procedures (3G TR 21.910 version 3.0.0 Release 1999) 3G TR 21.91 O version 3.0.0 Release 1999 1 ETSI TR 121 91 O V3.0.0 (2000-07) Re
2、ference RTWTSGT-O22191 OUR1 Keywords U MTS ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 0001 7 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice T
3、he pre ent d Individual copies of the present document can be downloaded from: http:/w.etsi.aq cument mav be made available in more than one electronic version or in orint. In anv case f existing or perceived difference in coitents between such versions, the reference version is the Poiable Docuhent
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6、ction extend to reproduction in all media. O European Telecommunications Standards Institute 2000. All rights reserved. ETSI 3G TR 21.91 O version 3.0.0 Release 1999 2 ETSI TR 121 91 O V3.0.0 (2000-07) Intellectual Property Rights IPRs essential or potentially essential to the present document may h
7、ave 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 O00 3 14: “Intellectual Propero Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI in respect of ETSI stand
8、ards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (-. 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
9、O00 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 Report (TR) has been produced by the ETSI 3d Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports us
10、ing their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under www.etsi.org/kev . ETSI 3G TR 21.91 O version 3.0.0 Release 1999 3
11、ETSI TR 121 91 O V3.0.0 (2000-07) Contents Foreword 4 Introduction 4 1 Scope 5 2 References 5 3 Definitions. symbols and abbreviations . 6 3.1 Definitions . 6 3.2 Abbreviations . 6 4 General Aspects . 7 4.1 Types of UEs . 7 4.1.1 Type 1 7 4.1.2 Type 2 7 4.1.3 Type 3 7 4.1.4 Type 4 8 5 Multi-mode ope
12、ration 8 5.1 Multi-mode operation of UMTS and GSM 8 5.1.1 Principles 8 5.1.2 PLMN selection . 8 5.1.3 Control of Radio Access Technology and Mode used . 8 5.1.4 Handover between Radio Access Technologies and Modes 9 5.1.5 Mobility Management aspects 9 Annex A: Change history 10 ETSI 3G TR 21.91 O ve
13、rsion 3.0.0 Release 1999 4 ETSI TR 121 91 O V3.0.0 (2000-07) Foreword This Technical Report has been produced by the 3d Generation Partnership Project, Technical Specification Group Terminals. The contents of the present document may be subject to continuing work within the 3GPP and may change follo
14、wing formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released with an identifying change of release date and an increase in version number as follows: Version m.x.y where: m indicates major version number x the second digit is incremented for all change
15、s of substance, i.e. technical enhancements, corrections, updates, etc. y the third digit is incremented when editorial only changes have been incorporated into the specification. Introduction When UMTS is launched the coverage will be very limited in many areas while several second-generation syste
16、ms will have a very wide coverage. To make UMTS useful for a wide range of users from the start, multi-mode UEs, combining e.g. second-generation radio access system with UMTS, are necessary. The present document describes issues concerning multi-mode UEs from a service and a terminal point of view.
17、 ETSI 3G TR 21.91 O version 3.0.0 Release 1999 5 ETSI TR 121 91 O V3.0.0 (2000-07) 1 Scope This 3GPP Technical Report identifies multi-mode User Equipments categories. This technical report also describes the general principles and procedures for the multi-mode operation standardised in the 3GPP spe
18、cifications. In particular, this TR is focused on a type 2 UE, as defined in Clause 4 in the present report. This type of UE can when utilising one mode, perform monitoring of another mode and report it utilising the current mode. This type of UE does not support simultaneous reception or transmissi
19、on through different modes. The scope of this TR is the type of terminal implemented with at least the following modes: - UTRA FDD and/or TDD mode - GSMmode Regarding the GSM mode, it encompasses the capabilities offered by the GSM technical specifications, e.g, Circuit Switched and Packet Switched
20、services using either GMSK or 8-PSK modulation in the frequency bands specified in the GSM specifications. The present report is built on and references specifications/reports being produced in 3GPP or within other relevant foras e.g. ETSI SMG. 2 Ref e re nces The following documents contain provisi
21、ons which, through reference in this text, constitute provisions of the present 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 referenc
22、e, the latest version applies. il Pl 3G TS 23.122: “NAS Functions related to Mobile Station (MS) in idle mode“ v3.2.0 3G TS 25.304: “UE Procedures in Idle Mode“ v1.2.0 31 3G TS 22.129: “Handover Requirements between UMTS and GSM or other Radio Systems“ v3.2.0 41 51 61 71 3G TR 21.905: “Vocabulary fo
23、r 3GPP Specifications “ v1.0.0 3G TS 22.01 1: “Service accessibility“ v3.1.0 3G TS 25.303: “UE Functions and Interlayer Procedures in Connected Mode“ v3.0.0 TS GSM 05.08: “ Digital cellular telecommunications system (Phase 2); Radio subsystem link control“ ETSI 3G TR 21.91 O version 3.0.0 Release 19
24、99 6 ETSI TR 121 91 O V3.0.0 (2000-07) 3 3.1 Definitions, symbols and abbreviations Definitions For the purposes of the present document, the terms and definitions apply: Active communication: a UE is in active communication when it has a CS connection established. For PS active communication is def
25、ined by the existence of one or more Activated PDP contexts. Either one or both of the mentioned active communications may occur in the UE. Camping on a cell: The UE is in idle mode and has completed the cell selection / reselection process and has chosen a cell. The UE monitors system information a
26、nd (in most cases) paging information. See 3G TS 23.122 i and 3G TS 25.304 2. Multi-mode UE: UE that can obtain service from at least one mode of UMTS, and one or more different systems such as GSM bands or possibly other radio systems such IMT-2000 family members. 31 Radio Access Mode: Mode of the
27、cell, FDD or TDD 4 Radio Access Technology: UMTS, GSM etc 4 3.2 Ab b revi at ions For the purposes of the present document, the following abbreviations apply: cc cs FFS GMM HO LA LU MM MMI PS RA RAT RR RRC SM URA Call Control Circuit Switched For Further Study GPRS Mobility Management Handover Locat
28、ion Area Location Update Mobility Management Man-Machine Interface Packet Switched Routing Area Radio Access Technology Radio Resource Radio Resource Control Session Management UTRAN Registration Area Additional definitions and abbreviations can be found in TR 21.905 4. ETSI 3G TR 21.91 O version 3.
29、0.0 Release 1999 7 ETSI TR 121 91 O V3.0.0 (2000-07) 4 General Aspects In the context of this Technical Report a multi-mode UE is considered to be a UE with at least one UMTS part (UTRA FDD and/or TDD). In addition, the multi-mode UE supports one or more other radio systems, e.g., GSM CSPS. Generall
30、y multi-mode UEs can be split in two categories based on the number of subscriptions. Either they have one and only one subscription, which is common for all modes of operation, or they have several subscriptions typical one per mode of operation. The first case with only one subscription is conside
31、red to be the typical case where the different modes are related to different radio access technologies on the same type of core network, e.g., UTRA FDD/TDD and GSM radio on a MAP based core network. This report deals only with the case of multi-mode UEs with one and only one subscription. The case
32、of multiple subscriptions can either be very simple or very complex. The modes can either work fully independently in which case each mode just would have to comply with the relevant standard or there are dependencies on the states between modes which makes the operation of this type of equipment in
33、 relation to the networks very complicated. Therefore the latter case is for the time being not considered of interest. This report will mainly deal with the interworking of UMTS and GSM, as the standards provides support for dual-mode of operation for these two radio access technologies. 4.1 Types
34、of UEs As stated earlier, this technical report only considers multi-mode UEs with a single common subscription for all of the supported modes. For Multi mode UEs with a single common subscription different types of UEs can be imagined and are briefly introduced in the following. In the descriptions
35、 of the types the term mode is used as short term for both Radio Access Technology and Radio Access Mode. 4.1.1 Type 1 This type of UE operates in each of the supported modes as a single mode UE, Le., when in a given mode the UE does not scan for or monitor any other mode. Change of mode is based on
36、 manual selection of a new mode. Manual selection of mode is understood to be a selection with user interaction. In the case this process is automated, the automated process shall use a timer to avoid repeated change of mode (ping-pong). When in a given mode the UE shall comply with the standard for
37、 that mode. When a new mode is selected, the mobile shall react towards the old mode as a single mode UE which is being switched off and towards the new mode as a single mode UE which is being switched on in that mode. 4.1.2 Type 2 This type of UE can when utilising one mode, perform monitoring of a
38、nother mode and report it utilising the current mode. The UEs monitoring and reporting capabilities can be considered to fulfil the specified behaviour for Multi-mode operation of the respective modes. When in a given mode, this type of UE shall comply with the standard for that mode including its s
39、pecified multi-mode operation. An overview of Multi-mode UMTS GSM operation can be found in clause 5 of this technical report. This type of UE does not support simultaneous reception or transmission through different modes. If the UE supports manual selection of mode, and manual selection of mode is
40、 activated, the UE shall behave as a UE of Type 1. 4.1.3 Type 3 For multi-mode in general a Type 3 UE, which can receive simultaneously in more than one mode, but not transmit simultaneously in more than one mode has been suggested. Utilisation of the additional capabilities of the Type 3 UE compare
41、d to the Type 2 UE is considered complex due to the cross impact of the two receptions. The current UMTS standard do not provide specific support for this type of UE. Therefore this technical report does not further treat this type of terminal. ETSI 3G TR 21.91 O version 3.0.0 Release 1999 8 ETSI TR
42、 121 91 O V3.0.0 (2000-07) 4.1.4 Type 4 For multi-mode in general a Type 4 UE, which can receive and transmit simultaneously in more than one mode has been suggested. Utilisation of the additional capabilities of the Type 4 UE compared to the Type 2 UE is considered complex due to the cross impact o
43、f the two receptions and/or transmissions. The current UMTS standard do not provide specific support for this type of UE. Therefore this technical report does not further treat this type of terminal. 5 Multi-mode operation This clause provides an overview of the multi-mode operations as specified in
44、 the standard. Throughout this clause the UE is assumed to be a UE of type 2 as defined in clause 4. 5.1 Multi-mode operation of UMTS and GSM 5.1 .l Principles Considering that the UMTS and GSM standards are using a common core network specification and that UMTS is seen as a natural evolution path
45、for GSM operators, it has been a requirement through the standardisation to provide for multi-mode UMTS GSM operation. This clause describes the basic principles for the multi-mode of operation as specified in the UMTS and GSM standards. Multi-mode operation is based on a separation of the PLMN sele
46、ction from the mode and cell selection. Meaning the PLMN is chosen first and, once the PLMN is selected, the choice of the mode has to be decided among the ones offered by the chosen PLMN as a part of the cell selection/reselection process, and thus is controlled by the selected operator through the
47、 parameter setting. The PLMN can be chosen by the user/application, but once the PLMN is selected, the user only provides wishes of the requested services and has no capability to actually choose the serving cell or the Radio Access Technology and its mode. 5.1.2 PLMN selection The procedures for PL
48、MN selection at power on and when recovering from lack of coverage is described in 3G TS 22.0 1 1 5 and 3G TS 23.122 i. Two procedures are specified for the PLMN selection, manual selection and automatic selection. The manual selection is a PLMN selection, which is based on user interaction, e.g. th
49、e user actively chooses a PLMN from a list of available PLMNs, refer 3G TS 22.01 1 5 for the detailed specification. The automatic PLMN selection is based on specified procedure by which the UE first search for the last registered PLMN and if that is not available then it search for the HPLMN followed by a search for other PLMNs. In automatic mode the search order for the PLMNs can be controlled by the prefer PLMN lists, see 3G TS 22.01 1 5 and 3G TS 23.122 i. When a suitable cell (see 3G TS 23.122) of a PLMN is found, the UE attempts to register on th
