1、 ETSI TR 122 936 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Multi-system terminals (3GPP TR 22.936 version 15.0.0 Release 15) TECHNICAL REPORT ETSI ETSI TR 122 936 V15.0.0 (2018-07)13GPP TR 22.936 version 15.
2、0.0 Release 15Reference RTR/TSGS-0122936vf00 Keywords GSM,LTE,UMTS 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/
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9、8-07)23GPP TR 22.936 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-me
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13、ame. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document m
14、ay 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 between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi
15、.org/key/queryform.asp. Modal verbs terminology In the present document “should“, “should not“, “may“, “need 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“
16、 are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 122 936 V15.0.0 (2018-07)33GPP TR 22.936 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Defin
17、itions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Categories of multi system terminals . 6g34.1 Common characteristics . 6g34.2 Category 1 - Manual switching 6g34.3 Category 2 - Automatic switching by an overlay function . 6g34.4 Category 3 - Selection method of one system to
18、 extended to another 6g34.4.1 Example A, extended PLMN list 6g34.4.2 Example B, extended PRL 6g34.5 Category 4 Multiple systems operational simultaneously . 6g35 Use cases 7g35.1 Roaming cases 7g35.2 Non-roaming cases . 7g36 Considerations for multi system terminals . 7g36.1 General categorization o
19、f usage . 7g36.2 Subscription aspects . 7g36.3 MMI aspects . 8g36.4 Charging aspects 8g36.5 Security aspects 8g36.6 Target time to select system . 8g36.7 System preference settings . 8g36.8 System selection 9g36.8.1 Overview 9g36.8.2 Switch-on or recovery from lack of coverage . 9g36.8.3 User resele
20、ction 9g36.8.4 System switching 9g37 Conclusion 9g37.1 Overview 9g37.2 General requirements for system selection . 10g3Annex A: Change history 11g3History 12g3ETSI ETSI TR 122 936 V15.0.0 (2018-07)43GPP TR 22.936 version 15.0.0 Release 15Foreword This Technical Report has been produced by the 3rdGen
21、eration 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 release dat
22、e and an increase in version 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. technic
23、al enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction In the past, operators within a country or a region deployed single system networks and, consequently, users got service from a single system
24、terminal. Multi mode terminals were sometimes deployed to maximise coverage, particularly during times of transition between radio access technologies (e.g. cdma/AMPS), but the same core network was always used. In the future it is likely that operators will operate more than one system and the core
25、 networks will be different. This may happen either through choice or company merger/acquisition. There will be cases where operators have different systems in the same geographic area and cases where operators use different systems in different regions. It is also likely that there will be roaming
26、agreements between operators of different systems. Therefore, the market for multi system terminals will increase and consideration is needed in 3GPP if new standardisation will be required or not. Leaving system selection unspecified could lead to differences between vendor implementations. Whereas
27、 this may in itself not be a problem, it needs to be ensured that 3GPP specifications are followed by multi system terminals with 3GPP capability and that no harm to 3GPP networks is caused. ETSI ETSI TR 122 936 V15.0.0 (2018-07)53GPP TR 22.936 version 15.0.0 Release 151 Scope The present document s
28、tudies the behaviour of a multi system terminal that supports both 3GPP and non-3GPP systems. Particular issues handled include, but are not restricted to: Whether the system selection or PLMN selection should take higher priority in a multi system terminal. Criteria for system change. Interaction b
29、etween the users and the operators preferences. Support of automatic and manual system selection mode. Different methods of system selection and their impact on 3GPP specifications. Some areas for possible standardization, to ensure 3GPP compliance and protection of 3GPP networks. The present docume
30、nt treats non-3GPP networks in a generic way but it applies mainly to the case of 3GPP2/3GPP compliant terminals. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified b
31、y 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 document), a non-specific reference impl
32、icitly 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 22.011: “Service accessibility“. 3 Definitions and abbreviations 3.1 Definitions Multi mode terminal: Terminal which supports multiple a
33、ccess technologies and accesses 3GPP core network (e.g. GSM/UMTS). Multi system terminal: Terminal which supports both the 3GPP system and non-3GPP system(s). Non-3GPP system: Mobile telecommunications system, having non-MAP core network, with specifications which are outside the control or influenc
34、e of 3GPP. 3GPP system: MAP core network and various access networks. 3GPP2 system: IS-41 core network and various cdma access network . Other definitions are given in 3GPP TR 21.905 1. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: PRL Preferred Roami
35、ng List GAIT GSM/ANSI-136 Interoperability R-UIM Removable User Interface Module (a 3GPP2 abbreviation) ETSI ETSI TR 122 936 V15.0.0 (2018-07)63GPP TR 22.936 version 15.0.0 Release 15Further abbreviations are given in 3GPP TR 21.905 1. 4 Categories of multi system terminals 4.1 Common characteristic
36、s - 3GPP and non-3GPP system(s) in the same terminal. Benefit to the user Increased coverage area. Wider range of services Can use one terminal for both systems. 4.2 Category 1 - Manual switching - The user manually selects system. - Separate 3GPP and non-3GPP identities (e.g. USIM and R-UIM). - Whe
37、n in 3GPP system, terminal does not scan non-3GPP systems and vice versa. 4.3 Category 2 - Automatic switching by an overlay function - When in 3GPP system, terminal scans non-3GPP systems and vice versa. - Terminal does not suspend operation on a system while it scans for the other (i.e. dual trans
38、ceivers). - Scanning information is passed to an overlay function which decides if to change system. - System is changed by selecting USIM or R-UIM in the case of 3GPP2 depending on user and/or operators preferences. 4.4 Category 3 - Selection method of one system to extended to another 4.4.1 Exampl
39、e A, extended PLMN list - The 3GPP network selection mechanism could be extended to non-3GPP networks. - Non 3GPP entries (e.g. cdma2000, SSID) could be contained in the 3GPP Preferred PLMN+RAT List. Note 1: Significant work would be needed in 3GPP and GSM-A to allow non-3GPP network information to
40、be contained in the PLMN list. However, one implementation specific solution may be for a dummy entry “switch to PRL” to be placed in the preferred PLMN list. 4.4.2 Example B, extended PRL - The 3GPP2 network selection mechanism could be extended to non-3GPP2 networks. - GSM/W-CDMA or SSID informati
41、on could be contained in the 3GPP2 PRL. Note 2: Work is being done in 3GPP2 on this method. 4.5 Category 4 Multiple systems operational simultaneously - User can access the internet directly via WLAN while the terminal is connected to the cellular network at the same time. Note 1: While connected to
42、 the 3GPP network, the terminal will follow 3GPP specifications. ETSI ETSI TR 122 936 V15.0.0 (2018-07)73GPP TR 22.936 version 15.0.0 Release 15- 3GPP and 3GPP2 parts of the terminal may be active at the same time (e.g. for different applications). 5 Use cases 5.1 Roaming cases Example 1: Luke, who
43、has a multi system terminal, uses the services of his 3GPP operator A. While on vacation in another country, the available networks are the 3GPP network of operator B, offering very basic 3GPP functionalities, and the non 3GPP network of operator C, offering equivalent services compared to operator
44、A. Ideally, Luke would like his device to select the non-3GPP operator C to be able to take advantage of the similarity of services. If his device selects operator B, Luke can select operator C manually if he wishes. Example 2: Andrew, who has a multi system terminal, uses the services of his 3GPP o
45、perator A. While on vacation in another country, the available networks are the 3GPP network of operator B, offering a wide range of 3GPP functionalities, and the non 3GPP network of operator C, offering equivalent services compared to operators A and B. Ideally, Andrew would like his device to sele
46、ct 3GPP operator B because services should generally work better in the same system (e.g. no transcoding). If his device selects operator C, Andrew can select operator B manually if he wishes. Example 3: Leia, who has a multi system terminal, uses the services of her 3GPP operator A. While on vacati
47、on in another country, the available networks are the 3GPP network of operator B, and the non 3GPP network of operator C. Operator A and C have a commercial alliance. Therefore, operator A would prefer that the non 3GPP operator C will be selected. Leia can select operator B manually if she wishes.
48、Example 4: Harry, who has a multi system terminal, uses the services of his 3GPP operator A. While on vacation in another country, the available networks are the 3GPP network of operator B, and the non 3GPP network of operator C. Operator A and C are in fact owned by the same company. Therefore, ope
49、rator A would like to be sure that the non 3GPP operator C will be selected. Harry can select operator B manually if he wishes. Note: In the above examples it is assumed that there are roaming agreements between operators A, B and C. 5.2 Non-roaming cases Example 5: Ana, who has a multi system terminal, uses the services of operator A. Operator A operates both 3GPP and a non-3GPP system in the same area. Operator A wishes to control when Ana uses each system for reasons of load sharing and to ensure that Ana gets the best possible user experi
