1、 ETSI TR 143 901 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Feasibility Study on generic access to A/Gb interface (3GPP TR 43.901 version 15.0.0 Release 15) TECHNICAL REPORT GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TR 143 901 V15.0.0 (2018-07)13GPP TR 43.
2、901 version 15.0.0 Release 15Reference RTR/TSGR-0643901vf00 Keywords GSM 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
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9、0 (2018-07)23GPP TR 43.901 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
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14、ment 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 corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webap
15、p.etsi.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 “mus
16、t not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 143 901 V15.0.0 (2018-07)33GPP TR 43.901 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33
17、 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 7g33.3 Abbreviations . 7g34 Assumed high level requirements 9g35 Study results . 9g35.1 Architecture 9g35.1.1 Architecture for generic access interface 9g35.1.1.1 Functional architecture 9g35.1.1.2 Functional entities . 10g3
18、5.1.1.2.1 Mobile Stations (MS) 10g35.1.1.2.2 Generic Access Network Controller (GANC) . 10g35.1.1.3 Interfaces . 11g35.1.1.3.1 A/Gb interfaces 11g35.1.1.3.2 Up interface . 11g35.1.1.3.3 Wm interface . 11g35.1.1.4 High level description of generic access . 11g35.1.2 Signalling flows 11g35.1.2.1 Regis
19、tration for generic access 11g35.1.2.2 Deregistration 13g35.1.3 Mobile originated call flow . 14g35.1.4 Mobile terminated call flow 16g35.1.5 GPRS procedures 17g35.1.5.1 GAN-GRR user data transport channel . 17g35.1.5.2 GPRS user data transport procedures 17g35.1.5.3 GPRS signalling and SMS transpor
20、t procedures . 17g35.1.5.4 Packet paging for GPRS data service 17g35.1.5.5 Packet paging for CS domain service 18g35.1.5.6 GPRS Suspend procedure . 18g35.1.5.7 GPRS Resume procedure 18g35.2 Protocol aspects 18g35.2.1 New Generic Layer . 18g35.2.1.1 CS domain signalling plane 18g35.2.1.2 CS domain us
21、er plane 20g35.2.1.3 PS domain signalling plane . 21g35.2.1.4 PS domain user plane 22g35.2.2 Existing protocols . 23g35.2.2.1 Standard 3GPP protocols 23g35.2.2.1.1 Short Message Service 23g35.2.2.1.2 GSM SMS services 24g35.2.2.1.3 GPRS SMS services 24g35.2.2.1.4 Supplementary services . 24g35.2.2.2
22、Standard IP-based protocols 24g35.3 Security mechanisms 24g35.3.1 Security levels . 24g35.3.2 Up interface security . 25g3ETSI ETSI TR 143 901 V15.0.0 (2018-07)43GPP TR 43.901 version 15.0.0 Release 155.4 Multi-mode terminal operation. 25g35.4.1 Mechanism of mode selection in multi-mode terminals .
23、26g35.4.2 PLMN selection 26g35.4.3 Re-selection between GERAN/UTRAN and GAN modes . 27g35.4.3.1 Rove-in (from GERAN/UTRAN to GAN) . 27g35.4.3.2 Rove-out (from GAN to GERAN/UTRAN) . 27g35.4.3.3 Ping-pong avoidance between GAN and GERAN/UTRAN . 27g35.4.4 Handovers between GAN and GERAN 28g35.4.4.1 Cel
24、l identifiers in generic access . 28g35.4.4.1.1 GAN cell id for Location Services 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, corrections, updates, etc
25、. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction This document captures the results of the feasibility study of enabling generic access to A/Gb interface using alternate access means such as ADSL, Cable, Bluetooth, etc. Mobile statio
26、ns obtain services from the GSM core network using such generic access means rather than through the traditional GERAN radio interface. The goal is to ensure no impact to the current A/Gb interface specifications. ETSI ETSI TR 143 901 V15.0.0 (2018-07)63GPP TR 43.901 version 15.0.0 Release 151 Scope
27、 This document studies the feasibility of generic access to A/Gb interface. Specific areas of study are: - Architecture to enable generic access. - Access interface protocols required to provide connectivity to A/Gb interface and GSM/GPRS services. - Security mechanisms to support generic access arc
28、hitecture. - Determining feasibility for support of services currently supported through GERAN. The focus of the study shall be on establishing the feasibility for supporting generic access in the home network case, while also identifying issues with extending the solution to the roaming scenarios.
29、2 References The following documents contain provisions, 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, subse
30、quent 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 implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TS
31、 22.011: “Service accessibility“. 2 3GPP TS 23.234: “3GPP system to Wireles Local Area Network (WLAN) interworking; System description“. 3 3GPP TS 26.103: “Speech codec list for GSM and UMTS“. 4 ITU-T Recommendation V.110: “Support by an ISDN of data terminal equipments with V-Series type interfaces
32、“. 5 IETF RFC 791: “Internet Protocol“. 6 IETF RFC 793: “Transmission Control Protocol“. 7 IETF RFC 2406: “IP Encapsulating Security Payload (ESP)“. 8 IKEv2 9 EAP SIM 10 IPSec NAT 11 IETF RFC 768: “User Datagram Protocol“. 12 IETF RFC 3550: “A Transport Protocol for Real-Time Applications“. 13 3GPP
33、TS 33.234: “3G security; Wireless Local Area Network (WLAN) interworking security“. 14 IETF RFC 2406: “ IP Encapsulating Security Payload (ESP)“. 15 3GPP TS 23.122: “Non-Access-Stratum functions related to Mobile Station (MS) in idle mode“. ETSI ETSI TR 143 901 V15.0.0 (2018-07)73GPP TR 43.901 versi
34、on 15.0.0 Release 153 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply. Generic Access Network: an access network providing access to A/Gb interfaces using broadband IP network. Generic Access Network Controlle
35、r: the network node that connects to the MSC and SGSN via the A-interface and Gb interface respectively and mimics the functionality of the GERAN BSS. Roving: the action of re-selection between 3GPP access technology and GAN for a mobile station in idle mode. Rove in: the mobile station reselects fr
36、om GERAN/UTRAN to GAN. Rove out: the mobile station reselects from GAN to GERAN/UTRAN. Handover: a mobile station engaged in a call moves between GERAN/UTRAN and GAN. Handover in: the mobile station moves from GERAN/UTRAN to GAN. Handover out: the mobile station moves from GAN to GERAN/UTRAN. Seamle
37、ss: free from noticeable transitions (i.e., no end-user action is required; speech interruptions are short; service interruptions are short; incoming calls are not missed; packet sessions are maintained; services work identically). 3.2 Symbols For the purposes of the present document, the following
38、symbols apply: A GSM A Interface : the A interface is located between the MSC (Mobile service Switching Centre) and the BSS (Base station system or radio Sub-System). Gb GSM Gb Interface : the Gb interface connects the Base Station System (BSS) to the Serving GPRS Support Node (SGSN) Up Interface be
39、tween MS and GAN Wm Reference point between a Packet Data Gateway and a 3GPP AAA Server or 3GPP AAA proxy 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: A-GPS Assisted-GPS AAA Authentication, Authorisation and Accounting ADSL Asymmetric Digital Subscri
40、ber Line ARFCN Absolute Radio Frequency Channel Number BCCH Broadcast Control CHannel BSIC Base transceiver Station Identity Code BSS Base Station Subsystem BSSAP Base Station Subsystem Application Part BSSGP Base Station Subsystem GPRS Protocol BSSMAP Base Station Subsystem Management Application P
41、art CBS Cell Broadcast Service CC Call Control CGI Cell Global Identity CI Cell Identity CM Connection Management CN Core Network CS Circuit SwitchedDSL Digital Subscriber Line DTAP Direct Transfer Application Part DTM Dual Transfer Mode ETSI ETSI TR 143 901 V15.0.0 (2018-07)83GPP TR 43.901 version
42、15.0.0 Release 15ESP Encapsulating Security Payload FFS For Further Study GAN Generic Access Network GANC Generic Access Network Controller GERAN GSM EDGE Radio Access Network GMM GPRS Mobility Management GMMRR GPRS Mobility Management Radio Resource GRR GPRS Radio Resource HLR Home Location Registe
43、r HO Handover HPLMN Home Public Land Mobile Network HTTP Hyper Text Transfer Protocol IMS IP Multimedia Subsystem IMSI International Mobile Subscriber Identity IP Internet Protocol L1 Layer 1 (physical layer) LA Location Area LA Location Area Identity LCS Location Services LLC Logical Link Control M
44、AC Medium Access Control (protocol layering context) MBMS Multimedia Broadcast and Multicast Service MM Man Machine MMI Man Machine Interface MMS Multimedia Messaging Service MO Mobile Originated MS Mobile StationMSC Mobile Switching Centre MVNO Mobile Virtual Network Operator NACC Network Assisted
45、Cell Change NAS Non-Access Stratum NC2 Network Control mode 2 OTDOA Observed Time Difference Of Arrival (positioning method) PCM Pulse Code Modulation PDP Packet Data Protocol PDU Protocol Data Unit PLMN Public Land Mobile Network PS Packet Switched RAN Radio Access Network RR Radio Resources RRC Ra
46、dio Resource Control RTCP Real-Time Transport Control Protocol RTP Real Time Protocol SAP Service Access PointSAPI Service Access Point Identifier SCCP Signalling Connection Control Part SGW Security Gateway SGSN Serving GPRS Support Node SID SIlence Descriptor SIM GSM Subscriber Identity Module SM
47、Session Management SMS Short Message Service SS Supplementary ServiceSSL Secure Sockets Layer TBF Temporary Block Flow TCP Transmission Control Protocol TFO Tandem Free Operation TLLI Temporary Logical Link Identity TMSI Temporary Mobile Subscriber Identity TrFO Transcoding Free Operation UDP User D
48、atagram Protocol UNC Universal Naming Convention ETSI ETSI TR 143 901 V15.0.0 (2018-07)93GPP TR 43.901 version 15.0.0 Release 15UTRAN Universal Terrestrial Radio Access Network VBS Voice Broadcast Service VGCS Voice Group Call Service VPLMN Visited Public Land Mobile Network 4 Assumed high level req
49、uirements This clause summarizes the various assumed requirements for the feasibility study, when providing generic access to A/Gb interfaces: - GAN interfaces to the core network shall use existing standard A interface to the MSC and Gb interface to the SGSN. Non-access stratum (NAS) protocols shall not be impacted. - GAN shall reuse the existing GERAN identifiers toward the core network. - GAN should support all telecommunication services supported using the A/Gb interfaces. - GAN shall be able to operate over existing generic IP access network
