1、 ETSI TR 1Digital cellular telecoUniversal Mobile TelService aspects and(3GPP TR 22.9TECHNICAL REPORT 122 951 V13.0.0 (2016communications system (Phaelecommunications System (LTE; nd requirements for network s.951 version 13.0.0 Release 1316-01) hase 2+); (UMTS); k sharing 13) ETSI ETSI TR 122 951 V
2、13.0.0 (2016-01)13GPP TR 22.951 version 13.0.0 Release 13Reference RTR/TSGS-0122951vd00 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 enregist
3、re la Sous-Prfecture de Grasse (06) 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 docume
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9、R 122 951 V13.0.0 (2016-01)23GPP TR 22.951 version 13.0.0 Release 13Intellectual 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-
10、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 server (https:/ipr.etsi.org/). Purs
11、uant 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, essential to the present doc
12、ument. Foreword This Technical Report (TR) 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
13、 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“, “need not“, “will“, “will not“, “can“ and
14、 “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 TR 122 951 V13.0.0 (2016-01)33GPP TR 22.951 version 13.0.0
15、Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Symbols 6g33.3 Abbreviations . 6g34 General Aspects 6g35 Network Sharing Scenarios
16、 6g35.1 Scenario1: Multiple core networks sharing common radio access network in R99 . 7g35.1.1 Limitations 7g35.2 Scenario 2: Geographically split networks sharing 7g35.3 Scenario 3: Common Network Sharing 8g35.4 Scenario 4: Common spectrum network sharing 8g35.5 Scenario 5: Multiple radio access n
17、etworks sharing common core network 9g36 Network Identities and User Classification 10g37 User Requirements . 10g37.1 Network selection . 10g37.2 Network name display 10g37.3 UE requirements . 10g38 Network requirements 11g39 Mobility Requirements . 11g39.1 Service continuity . 11g39.2 Handover 11g3
18、9.3 Roaming . 11g310 Security Requirements . 12g311 Charging Requirements 12g312 Conclusions 12g312.1 Impacts on 3GPP Specifications 12g3Annex A (informative): Examples of network sharing realisations . 13g3A.1 Advanced Geographical split with seamless national roaming 13g3A.1.1 Functionalities need
19、ed 14g3A.2 Common shared spectrum scenario 14g3A.2.1 Functionalities needed 15g3Annex B (informative): Change history . 19g3History 20g3ETSI ETSI TR 122 951 V13.0.0 (2016-01)43GPP TR 22.951 version 13.0.0 Release 13Foreword This Technical Report has been produced by the 3rdGeneration Partnership Pro
20、ject (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 ve
21、rsion 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, correc
22、tions, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction Network sharing is becoming more and more popular as a means to provide coverage quickly and in a cost efficient way. The high price paid for the license in some cou
23、ntries as well as mergers, acquisitions have raised recently high interest in this topic. For these reasons 3GPP has decided to investigate what shortcomings currently in the technical specifications may prevent a standardized approach to the deployment of shared networks. This TR is aimed to descri
24、be a wide variety of possible network sharing and highlight the expected user experience for each of the scenarios. Charging aspects, terminal aspects and security are also investigated. The purpose of this technical report is to collate in a single document the requirements, considerations and depl
25、oyment scenarios that operators as well as users need to see fulfilled for a successful use of a shared network. Particular attention has been given in making possible the avoidance of proprietary solutions particularly for what concerns the terminals. Furthermore, the concepts discussed in this rep
26、ort may be applied to sharing a GERAN and UTRAN infrastructure, in this sense the interest in network sharing tools extends to the vast majority of the existing GSM operators who intend to deploy a UMTS Terrestrial Radio Access Network layer to complement the existing GSM/GPRS coverage. ETSI ETSI TR
27、 122 951 V13.0.0 (2016-01)53GPP TR 22.951 version 13.0.0 Release 131 Scope In the current dynamic market place, as a result of partnerships, acquisitions, creative agreements among operators and so on, the need for tools that enable various degrees of network sharing is becoming more and more import
28、ant. When GSM and then UMTS were specified, the possibility of sharing part or all of the network by two or more separated commercial entities was not considered and as a result the standards lack some functionalities that enable the realisation of such commercial agreements. GSM was designed under
29、the principle “one operator, one radio access network“. The GSM network has some possibilities of infrastructure sharing, but it does not support true radio access network sharing. The initial design of 3GPP system has followed the same principle. This technical report is aimed to capture the servic
30、e and user requirements that must be fulfilled by the 3GPP system in order to enable network sharing in a standardised way. Section 5 describes various Network sharing includes various scenarios e.g. spanning from common radio access network connected to multiple core networks toor multiple radio ac
31、cess networks sharing one core network. Section 6 contains a summary of the user classification and network identities. In section 7 the user requirements are described, while section 8 deals with the network operator requirements. Section 9 describes the mobility requirements in a shared network. T
32、he rest of the document is covering security (section 10) and charging (section 11). Some conclusions can be found in section 12 and an annex with examples of practical realisation of network sharing is provided. 2 References The following documents contain provisions which, through reference in thi
33、s 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 reference, the latest version applies. In t
34、he case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly 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 “. 3 Definitions, symbols and abbreviations 3.1 D
35、efinitions Core Network Operator: Operator that offers core network services. Iu-flex: Routing functionality for intra domain connection of RAN nodes to multiple CN nodes. Radio Access Network Operator: Operator that offers radio access to one or more core network operators. RAN sharing: Two or more
36、 CN operators share the same RAN, i.e. a RAN node (RNC or BSC) is connected to multiple CN nodes (SGSNs and MSC/VLRs) belonging to different CN operators. Roaming: The ability for a user to function in a serving network different from the home network. The serving network could be a shared network o
37、perated by two or more network operator. Shared Network: When two or more network operator sharing network elements. ETSI ETSI TR 122 951 V13.0.0 (2016-01)63GPP TR 22.951 version 13.0.0 Release 133.2 Symbols 3.3 Abbreviations For the purposes of the present document, the following abbreviations appl
38、y: 4 General Aspects 5 Network Sharing Scenarios Sharing networks and network infrastructure has become a very important part of 3GPP systems. There are many network-sharing scenarios possible depending on different operator strategies but also on rules and legislation in different countries. 3GPP s
39、ystems are originally not fully designed for network sharing between different operators however some limited support exists in the 3GPP Release 99.The equivalent PLMN feature in Release 99 allows operators to share a common UTRAN, with certain parts of the core networks also shared between the oper
40、ators, see Figure 1. CommonCore Network 1 + 2UTRANOperator BCore Network 2Operator ACore Network 1Figure 1: Two operators sharing the same UTRAN. To make this work, parts of the core network need to shared as well. Important to note here is that this network-sharing scenario allows operators without
41、 a UMTS license to share the network and supply its customers with 3G services. For example, a 2G operator may supply its subscribers with 3G services using another operator“s allocated spectrum. A geographically split network, i.e. a scenario in which cooperating operators cover different parts of
42、a country, is also possible in Release 99. One operator“s core network may also be connected to several UTRANs, see Figure 1. Different kinds of evolution paths are essential for shared networks. For example, it is not only the sharing solution at a certain time that is important, but also how it is
43、 possible for the sharing partners to evolve either to a more dedicated network or to a more joint network. That is, the set of infrastructure sharing solutions and scenarios that is discussed in the industry cover alternatives that together include: - solution alternatives targeting at dedicated ne
44、tworks in the near future, - solutions for infrastructure sharing not targeting at immediate exit, but at exit when for example the network capacity demand so requires, - infrastracture sharing targeting at long term sharing, which for example is the case when one of the operators lacks a frequency
45、license. Although these network-sharing scenarios are possible in Release 99 of 3GPP systems, the solutions are far from optimised. Identifying, changing, and adding appropriate functionality in the network will definitely lead to a better shared-network operation. ETSI ETSI TR 122 951 V13.0.0 (2016
46、-01)73GPP TR 22.951 version 13.0.0 Release 135.1 Scenario1: Multiple core networks sharing common radio access network in R99 For operators that have multiple frequency allocations it is possible to share the RAN elements, but not to share the radio frequencies. In this case the operators connect di
47、rectly to their own dedicated carrier layer in the shared RNC in the shared RAN. This solution is possible with 3GPP Release 99 and is illustrated below in Figure 2 for the case when two operators have one license each. Frequency oneFrequency twoShared RNCFrequency oneFrequency twoShared Node BMNCon
48、eMNCtwoOperator oneOperator twoFigure 2: The figure illustrates how it is possible to within the 3GPP Release 99 framework have dedicated carrier layers in the RAN for multiple operator. The operators transmit their own mobile network code (MNC) on their dedicated carrier 5.1.1 Limitations FFS 5.2 S
49、cenario 2: Geographically split networks sharing In this scenario, two (or more) operators with individual 3G licenses will with their respective radio access networks cover different parts of a country but together provide coverage of the entire country. This scenario can be divided into following cases: 1) When two (or more operators) employ national roaming for the users, which implies that only one core network will be associated with each radio access network. Care is obviously needed when coverage regions overlap, which makes this a valid shared-networks scenar
