1、 ETSI TR 122 986 V14.0.0 (2017-03) Universal Mobile Telecommunications System (UMTS); Study on Service Specific Access Control (3GPP TR 22.986 version 14.0.0 Release 14) TECHNICAL REPORT ETSI ETSI TR 122 986 V14.0.0 (2017-03)13GPP TR 22.986 version 14.0.0 Release 14Reference RTR/TSGS-0122986ve00 Key
2、words 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 7803/88 Important notice The present document can be download
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7、tten authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPP
8、TM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 122 986 V14.0.0 (2017-03)23GPP TR 22.986 version 14.0.0 Release 14Intellectual Property
9、 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-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essen
10、tial, 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/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried o
11、ut 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 document. Foreword The present document may refer to technical specifications or reports usi
12、ng 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.org/key/queryform.asp. Modal verbs terminology In
13、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“ are NOT allowed in ETSI deliverables except when u
14、sed in direct citation. ETSI ETSI TR 122 986 V14.0.0 (2017-03)33GPP TR 22.986 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definiti
15、ons 5g33.2 Symbols 5g33.3 Abbreviations . 5g34 Use Cases . 6g35 Considerations 6g36 Candidate Requirements. 6g37 Conclusion 7g3Annex A: Change history 8g3History 9g3ETSI ETSI TR 122 986 V14.0.0 (2017-03)43GPP TR 22.986 version 14.0.0 Release 14Foreword This Technical Report (TR) has been produced by
16、 ETSI 3rd Generation 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 o
17、f release date 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,
18、 i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction In an emergency situation, like Earthquake or Tsunami, degradation of quality of service may be experienced. Degradation in servi
19、ce availability and performance can be accepted in such situations, but mechanisms are desirable to minimize such degradation and maximize the efficiency of the remaining resources. When Domain Specific Access Control (DSAC) mechanism was introduced for UMTS, the original motivation was to enable PS
20、 service continuation during congestion in CS Nodes in the case of major disaster like an Earthquake or a Tsunami. In fact, the use case of DSAC in real UMTS deployment situation has been to apply access control separately on different types of services, such as voice and other packet-switched servi
21、ces. For example, peoples psychological behaviour is to make a voice call in emergency situations and it is not likely to change. Hence, a mechanism will be needed to separately restrict voice calls and other services. As EPS is a PS-Domain only system, DSAC access control does not apply. This SSAC
22、TR identifies specific features useful when the network is subjected to decreased capacity and functionality. Considering the characteristics of voice and non-voice calls in EPS, requirements of the SSAC could be to restrict the voice calls and non-voice calls separately. For a normal paid service t
23、here are QoS requirements. The provider can choose to shut down the service if the requirements cannot be met. In an emergency situation the most important thing is to keep communication channels uninterrupted, therefore the provider should preferably allow for a best effort (degradation of) service
24、 in preference to shutting the service down. During an emergency situation there should be a possibility for the service provider also to grant services, give extended credit to subscribers with accounts running empty. Under some circumstances (e.g. the terrorist attack in London on the 7 of July in
25、 2005), overload access control may be invoked giving access only to authorities or a predefined set of users. It is up to national authorities to define and implement such schemes. ETSI ETSI TR 122 986 V14.0.0 (2017-03)53GPP TR 22.986 version 14.0.0 Release 141 Scope This Technical Report (TR) pres
26、ents the results of the Study on Service Specific Access Control (SSAC). The intent of this Study is to assess the ability of 3GPP specifications to meet requirements identified for Services Specific Access Control. This Study considers the following aspects: - Study use cases and clarify issues in
27、SSAC in EPS. - Describe the considerations and the problems with existing access control, which are identified in the use cases - Identify candidate requirements and aspects for providing SSAC in EPS. 2 References The following documents contain provisions which, through reference in this text, cons
28、titute 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 the case of a
29、 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”. 2 3GPP TR 23.898: “Access Class Barring and Overload Protec
30、tion (ACBOP)“ 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
31、1. 3.2 Symbols For the purposes of the present document, the following symbols apply: 3.3 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of th
32、e same abbreviation, if any, in TR 21.905 1. ETSI ETSI TR 122 986 V14.0.0 (2017-03)63GPP TR 22.986 version 14.0.0 Release 144 Use Cases Use case 1 Japanese operators provide Disaster Message Board services whenever a major disaster has happened such as an earthquake, tsunami or typhoon. This service
33、 enables the large number of subscribers to access the message board in order to post or retrieve information concerning the safety of individuals in the affected area with their mobile phones during a major disaster. The human psychological behaviour is to make a voice call in emergency situations.
34、 Thus increased voice traffic consumes too much bandwidth for accessing other services such as the Disaster Message Board and/or data services (e.g. SMS). Hence, a limiting mechanism is required to differentiate bandwidth consuming real-time services (e.g. Voice) from bandwidth-efficient data servic
35、e to access to e.g. a Disaster Message Board. Use case 2 As described in the Use case 1 above, subscribers may wish to make voice calls to check on the safety of individuals and it may cause congestion. Under such a situation, prioritised subscribers (e.g. governmental, military civil authorities )
36、and (depending on national regulation) access to emergency services should still be allowed access to EPS, while voice calls for other subscribers are restricted. 5 Considerations In UMTS, Domain Specific Access Control (DSAC) has been introduced. According to Section 4.1.1 of TR23.898 x, the origin
37、al motivation was to enable PS service continuation during congestion in CS nodes. Although that was the original motivation, operators have been using DSAC to restrict CS calls while permitting PS sessions. Operators want to avoid service discontinuity in the packet data services due to the congest
38、ion in the voice calls side. Consequently, the use case of DSAC in a real deployment situation has been to apply access control separately on different types of services, such as voice and other packet-switched services. The voice services will be provided by MMTeL using IMS in EPS; however the VoIP
39、 will be used in the same way as the existing CS-domain voice services (e.g. including Emergency Calls). This means customer experience per “Service” in EPS is not different from UMTS. It is reasonable that DSAC principles are to be applied in the PS-domain only EPS as well. However, EPS is a PS-Dom
40、ain only system, so the “Domain Specific” way of access control cannot be applied as it is now. Hence, “Service Specific” Access Control (SSAC) has to be specified and introduced to EPS. 6 Candidate Requirements The following is the principle for the Service Specific Access Control. 1. The EPS shall
41、 provide a capability to apply independent access control for telephony services (MMTEL) and other data services, for mobile originating session requests from idle-mode. 2. The EPS shall provide a capability to assign a service probability factor for each of MMTEL voice and MMTEL video: - assign a b
42、arring rate (percentage) commonly applicable for Access Classes 0-9; - assign a flag barring status (barred /unbarred) for each Access Class in the range 11-15. SSAC shall not apply to Access Class 10. 3. The SSAC shall be provided by the VPLMN based on operator policy without accessing the HPLMN. 4
43、. The SSAC shall provide mechanisms to minimize service availability degradation (i.e. radio resource shortage) due to the mass simultaneous mobile originating session requests and maximize the availability of the wireless access resources for non-barred services. ETSI ETSI TR 122 986 V14.0.0 (2017-
44、03)73GPP TR 22.986 version 14.0.0 Release 147 Conclusion This Technical Report (TR) on Study on Service Specific Access Control (SSAC) identified the requirements for SSAC and considered the following aspects: - Use cases were documented and issues clarified for SSAC in EPS. - Considerations were de
45、scribed as well as problems with existing access control, which are identified in the use cases. - Candidate requirements and aspects were identified for providing SSAC in EPS. From this study, it is concluded the following: - EPS is a PS-Domain only system, so the “Domain Specific” way of access co
46、ntrol cannot be applied as it is now. Hence, “Service Specific” Access Control (SSAC) has to be specified and introduced to EPS. SSAC shall provide mechanisms to minimize service availability degradation (i.e. radio resource shortage) due to the mass simultaneous mobile originating session requests
47、and maximize the availability of the wireless access resources for non-barred services. It is also concluded that the content of this TR be used as a basis for further work within 3GPP. ETSI ETSI TR 122 986 V14.0.0 (2017-03)83GPP TR 22.986 version 14.0.0 Release 14Annex A: Change history Change hist
48、ory TSG SA# SA Doc. SA1 Doc Spec CR Rev Rel Cat Subject/Comment Old New WI SP-42 SP-080786 S1-084390 22.986 - - Rel-9 - One-step-approved at SA#42 1.0.0 9.0.0 SSAC 2011-03 - - - - - - - Update to Rel-10 version (MCC) 9.0.0 10.0.0 2012-09 - - - - - - - Updated to Rel-11 by MCC 10.0.0 11.0.0 2014-10 Updated to Rel-12 by MCC 11.0.0 12.0.0 2015-12 - - - - - - - Updated to Rel-13 by MCC 12.0.0 13.0.0 2017-03 - - - - - - - Updated to Rel-14 by MCC 13.0.0 14.0.0 ETSI ETSI TR 122 986 V14.0.0 (2017-03)93GPP TR 22.986 version 14.0.0 Release 14History Document history V14.0.0 March 2017 Publication
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