1、 ETSI TR 143 902 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Enhanced Generic Access Networks (EGAN) study (3GPP TR 43.902 version 14.0.0 Release 14) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRTECHNICAL REPORT ETSI ETSI TR 143 902 V14.0.0 (2017-04)13GPP TR 43.902 vers
2、ion 14.0.0 Release 14Reference RTR/TSGR-0643902ve00 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 7803/88
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9、ociation. ETSI ETSI TR 143 902 V14.0.0 (2017-04)23GPP TR 43.902 version 14.0.0 Release 14Intellectual 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
10、ETSI members and non-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:
11、/ipr.etsi.org/). 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 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essenti
12、al to the present document. 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 be
13、ing 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 the present document “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 143 902 V14.0.0 (2017-04)33GPP TR 43.902 version 14.0.0 R
15、elease 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 6g3Introduction 6g31 Scope 7g32 References 7g33 Definitions, symbols and abbreviations . 8g33.1 Definitions 8g33.2 Symbols 8g33.3 Abbreviations . 8g34 Requirements 10g34.1 Objectives . 10g34.2 Benef
16、its 11g34.3 For further investigation . 11g35 Architecture alternatives. 11g35.1 A/Gn based architectures 11g35.1.1 Enhanced Up . 11g35.1.1.1 Architecture . 11g35.1.1.2 Protocol stacks 13g35.1.1.2.1 PS Control Plane 13g35.1.1.2.2 PS User Plane 14g35.1.1.3 Affected Procedures 14g35.1.1.3.1 PS mobilit
17、y overview 14g35.1.1.3.2 PDP Context Activation /De-Activation . 20g35.1.1.3.3 PS Handover procedures between GAN and GERAN/UTRAN . 26g35.1.1.3.4 CS+PS Handover between GAN and GERAN/UTRAN . 29g35.1.1.3.5 APN resolution in EGAN mode 35g35.1.1.3.6 SMS in EGAN mode . 38g35.1.1.3.7 EGAN Registration an
18、d subscriber management in PS Domain . 39g35.1.1.3.8 Network Requested PDP Context Activation (NRPCA) . 42g35.1.1.3.9 Roaming aspects 45g35.1.1.4 Terminal architecture and impacts 46g35.1.1.4.1 Introduction . 46g35.1.1.4.2 CS domain Control Plane 47g35.1.1.4.3 CS domain User Plane . 48g35.1.1.4.4 PS
19、 domain 48g35.1.1.5 EGAN handovers and LA/RA Update signalling . 51g35.1.1.5.1 Introduction . 51g35.1.1.5.2 GERAN/GAN Scenario . 51g35.1.1.5.3 UMTS/GERAN/GAN Scenario 53g35.1.1.5.4 GAN Enhancement alternatives 53g35.1.1.6 Proxy-Gn Load and Performance 54g35.1.1.6.1 Introduction . 54g35.1.1.6.2 Assum
20、ptions 55g35.1.1.6.3 CPU Load 55g35.1.1.6.4 Memory Consumption . 56g35.1.1.6.5 Signalling Delay 56g35.1.2 Combined GANC/SGSN 57g35.1.2.1 Introduction . 57g35.1.2.2 Architecture . 58g3ETSI ETSI TR 143 902 V14.0.0 (2017-04)43GPP TR 43.902 version 14.0.0 Release 145.1.2.3 Protocol stacks 59g35.1.2.3.1
21、PS Control plane 59g35.1.2.3.2 PS User plane 60g35.1.2.4 Affected procedures 60g35.1.2.5 Terminal architecture and impacts 60g35.1.2.6 Optimization for LLC and SNDCP Layers . 61g35.2 GAN Iu Mode . 62g35.2.1 Functional Architecture 62g35.2.2 Functional entities . 64g35.2.2.1 Mobile Station (MS) . 64g
22、35.2.2.2 Generic Access Network Controller (GANC) . 64g35.2.3 Control and User Plane Architecture 64g35.2.3.1 Circuit Switched (CS) Domain . 65g35.2.3.1.1 CS Domain - Control Plane . 65g35.2.3.1.2 CS Domain - User Plane 66g35.2.3.2 Packet Switched (PS) Domain 67g35.2.3.2.1 PS Domain - Control Plane
23、. 67g35.2.3.2.2 PS Domain - User Plane 68g35.2.3.3 GA-RC (Generic Access Resource Control) . 68g35.2.3.3.1 General 68g35.2.3.3.2 States of the GA-RC sub-layer 69g35.2.3.4 GA-RRC (Generic Access Radio Resource Control) 70g35.2.3.4.1 General 70g35.2.3.4.2 States of the GA-RRC sub-layer . 70g35.2.4 Sec
24、urity Mechanisms 71g35.2.5 High Level Procedures 71g35.2.5.1 Mode Selection in Multi-mode terminals 71g35.2.5.2 PLMN Selection 72g35.2.5.3 Re-selection between GERAN/UTRAN and GAN modes . 73g35.2.5.3.1 Rove-in (from GERAN/UTRAN mode to GAN mode) 73g35.2.5.3.2 Rove-out (from GAN mode to GERAN/UTRAN m
25、ode) 73g35.2.5.4 GAN Discovery and Registration related procedures . 74g35.2.5.4.1 Discovery and Registration for Generic Access 74g35.2.5.4.2 De-Registration 80g35.2.5.4.3 Registration Update . 81g35.2.5.4.4 Keep Alive. 82g35.2.5.4.5 Cell Broadcast Information . 82g35.2.5.5 Void. 83g35.2.5.6 Void.
26、83g35.2.5.7 GA-RRC Connection handling . 83g35.2.5.7.1 GA-RRC Connection Establishment . 83g35.2.5.7.2 GA-RRC Connection Release . 83g35.2.5.8 Security Mode Control 84g35.2.5.9 NAS Signalling Procedures . 84g35.2.5.10 Mobile Originated CS Call 85g35.2.5.11 Mobile Terminated CS Call 87g35.2.5.12 CS C
27、all Clearing . 88g35.2.5.13 CS Handover . 88g35.2.5.13.1 CS Handover from GERAN to GAN 88g35.2.5.13.2 CS Handover from UTRAN to GAN 90g35.2.5.13.3 CS Handover from GAN to GERAN 92g35.2.5.13.4 CS Handover from GAN to UTRAN 93g35.2.5.14 Void. 95g35.2.5.15 Void. 95g35.2.5.16 Void. 95g35.2.5.17 GA-RRC P
28、acket Transport Channel Management Procedures . 95g35.2.5.17.1 States of the GA-RRC Packet Transport Channel . 96g35.2.5.17.2 PTC Initial Activation . 97g35.2.5.17.3 PTC Data Transfer . 98g35.2.5.17.4 MS initiated PTC Deactivation 99g35.2.5.17.5 MS initiated PTC Re-activation 100g35.2.5.17.6 Network
29、 initiated PTC De-activation 101g3ETSI ETSI TR 143 902 V14.0.0 (2017-04)53GPP TR 43.902 version 14.0.0 Release 145.2.5.17.7 Network initiated PTC Re-activation 101g35.2.5.17.8 Implicit PTC De-activation due to MS De-registration . 102g35.2.5.18 PDP Context Activation 103g35.2.5.19 Network Requested
30、PDP Context Activation 104g35.2.5.20 PS Handover between GERAN and GAN 105g35.2.5.20.1 PS Handover from GERAN to GAN . 105g35.2.5.20.2 PS Handover from GAN to GERAN . 105g35.2.5.21 SRNS Relocation between UTRAN and GAN . 105g35.2.5.21.1 SRNS Relocation from UTRAN to GAN 105g35.2.5.21.2 SRNS Relocati
31、on from GAN to UTRAN 107g35.2.6 Terminal Architecture Impacts . 109g35.2.6.1 Assumptions and Definitions 109g35.2.6.2 Impact on CS Control Plane 110g35.2.6.2.1 CS Control Plane - Before . 110g35.2.6.2.2 CS Control Plane-After . 111g35.2.6.2.3 Summary of CS Control Plane Changes 111g35.2.6.3 Impact o
32、n CS User Plane 112g35.2.6.3.1 CS User Plane-Before 112g35.2.6.3.2 CS User Plane-After 113g35.2.6.3.3 Summary of CS User Plane Changes 113g35.2.6.4 Impact on PS Control Plane 113g35.2.6.4.1 PS Control Plane-Before . 113g35.2.6.4.2 PS Control Plane-After 114g35.2.6.4.3 Summary of PS Control Plane Cha
33、nges 115g35.2.6.5 Impact on PS User Plane . 116g35.2.6.5.1 PS User Plane-Before 116g35.2.6.5.2 PS User Plane-After 117g35.2.6.5.3 Summary of PS User Plane Changes . 117g36 Evaluation Section 118g36.1 Enhanced Up 118g36.2 Combined GANC/SGSN 122g36.3 GAN Iu Mode . 124g36.4 Comparison of the Proposed S
34、olutions 126g37 Conclusion 132g3Annex A: Change history 134g3History 135g3ETSI ETSI TR 143 902 V14.0.0 (2017-04)63GPP TR 43.902 version 14.0.0 Release 14Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject
35、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 version number as follows: Version x.y.z where: x the first digi
36、t: 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, corrections, updates, etc. z the third digit is incremented when edi
37、torial only changes have been incorporated in the document. Introduction During the course of Release 6, 3GPP TS 43.318 2 (Generic access to the A/Gb interface; Stage 2) and 3GPP TS 44.318 3 (Generic access to the A/Gb interface; Stage 3) were developed that provide access to the 3GPP core network u
38、sing generic IP connection. Generic Access Networks, or GAN, is an extension of GSM/GPRS mobile services into the customers premises that is achieved by tunnelling certain GSM/GPRS protocols between the customers premises and the Core Network over broadband IP network, and relaying them through an u
39、nlicensed radio link inside the customers premises. GAN is a complement to traditional GSM/GPRS radio coverage, used to enhance customer premises coverage, increase network capacity and potentially lower costs. Early deployments of GAN are now ongoing. As part of the continuous process of optimizing
40、 their network to better meet customer demand a number of operators have indicated a need to further enhance the GAN system. Various goals for such enhancements are documented in section four of the present document. After presentation of the goals, the present document technical alternatives for ho
41、w to implement such enhancements to GAN. ETSI ETSI TR 143 902 V14.0.0 (2017-04)73GPP TR 43.902 version 14.0.0 Release 141 Scope The present document contains the results of the feasibility study into the enhancements to Generic Access Networks or GAN. Considerations include overall requirements for
42、enhancements, architectural requirements, evaluation of potential architectural solutions and alternative architectures. The objective is to identify an architectural solution that best meets the requirements as specified in first section. The feasibility study shall also investigate mechanisms for
43、selecting the most appropriate network domain to serve the user. Existing solutions developed by the 3GPP should be reused as much as possible. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are
44、 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 reference to a 3GPP document (including a GSM document),
45、 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 TS 43.318: “Generic access to the A/Gb interface; Stage 2“. 3 3GPP TR 44 318: “Generic Access (GA) to the A/G
46、b interface; Mobile GA interface layer 3 specification“. 4 3GPP TS 24.008: “Mobile radio interface Layer 3 specification; Core network protocols; Stage 3“. 5 3GPP TS 29.060: “General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface“. 6 3GPP TS 23.060: “Gener
47、al Packet Radio Service (GPRS); Service description; Stage 2“. 7 3GPP TS 23.078: “Customized Applications for Mobile network Enhanced Logic (CAMEL) Phase X; Stage 2“. 8 3GPP TS 32.251: “Telecommunication management; Charging management; Packet Switched (PS) domain charging“. 9 3GPP TS 24.007: “Mobil
48、e radio interface signalling layer 3; General aspects“. 10 3GPP TS 33.107: “3G security; Lawful interception architecture and functions“. 11 IETF RFC 2784 (March 2000): “Generic Routing Encapsulation (GRE)“. 12 3GPP TS 25.410: “UTRAN Iu interface: General aspects and principles“. 13 3GPP TS 25.450:
49、“UTRAN Iupc interface general aspects and principles“. 14 3GPP TS 25.419: “UTRAN Iu-BC interface: Service Area Broadcast Protocol (SABP)“. 15 3GPP TS 29.234, v11.2.0: “3GPP system to Wireless Local Area Network (WLAN) interworking; Stage 3“. 16 3GPP TS 25.412: “UTRAN Iu interface signalling transport“. ETSI ETSI TR 143 902 V14.0.0 (2017-04)83GPP TR 43.902 version 14.0.0 Release 1417 3GPP TS 25.414: “UTRAN Iu interface data transport and transport signalling“. 18 3GPP TS 25.415: “UTRAN Iu interface user plane protocols“. 19 3G
