Requirements and capabilities for an evolving NGN infrastructure

Transcription

1 FORUM ON NEXT GENERATION STANDARDIZATION (Clmb, Sri Lanka, 7-10 April 2009) Requirements and capabilities fr an evlving NGN infrastructure Marc Carugi ITU-T SG13 WP2 c-chair and Q.3/13 Rapprteur Senir Advisr, Nrtel Netwrks FRANCE

2 Outline Requirements and capabilities f an evlving NGN infrastructure in sme key technical dmains Architecture QS Mbility Security and Identity Management Intercnnectin Accunting and charging NOTE: presentatin fcused n ITU-T SG13 wrk (but NGN related deliverables have been develped in varius Study Grups) Clmb, Sri Lanka, 7-10 April

3 Y.2012: basic functinal view Applicatins ANI Applicatin Supprt & Service Supprt Management End-User Service User Prfiles Service stratum Netwrk Attachment Cntrl Transprt User Prfiles Service Cntrl Transprt Cntrl Resurce and Admissin Cntrl Other Netwrks Transprt UNI Transprt stratum Cntrl Media Management NNI Clmb, Sri Lanka, 7-10 April

4 Applicatins A NGN cmpnents view Service Stratum Applicatin Applicatin Supprt and Service Supprt S. User Prfile Other NGN Service Cmpnents Service Cntrl Legacy Terminals Legacy Terminals GW GW Access T. User Netwrk Attachment Prfile Cntrl Attachment (NACF) PSTN / ISDN Emulatin Service Cmpnent IP Multimedia IP Multimedia Cmpnent &PSTN/ISDN Service Cmpnent Simulatin Resurce and Admissin Cntrl (RACF) Other Netwrks Custmer Netwrks NGN Terminals End User Access Access Netwrk Transprt Edge Cre Cre transprt Transprt Transprt Stratum Clmb, Sri Lanka, 7-10 April

5 Y.2201 : NGN Release 1 Requirements and Capabilities Scpe f Y.2201 High level requirements and capabilities t supprt NGN Release 1 service bjectives NOTES: Rel.1 addresses nly NGN netwrk capabilities (n user equipment) Service-specific requirements are ut f scpe Each NGN realisatin may use an arbitrary set f services & capabilities The NGN Capabilities identified in Y.2201 Derived essentially frm functinalities already develped in varius technical bdies and cnsidered ready fr use in Rel.1 time frame Described in terms f requirements (but these are nt precise Functinal Requirements fr specific NGN entities) Prviding guidelines fr the NGN architecture wrk s that the specified architecture FEs are able t supprt these capabilities and assciated requirements (architecture FEs and related prtcl specificatins) Y.2201 NGN Release planned fr apprval in Q2-Q Clmb, Sri Lanka, 7-10 April

6 3GPP IMS subsystem IMS (IP Multimedia Subsystem) Prvisin f call prcessing and a variety f multimedia services in an IP-based packet-switching dmain Cmpliance with IETF standardized sessin cntrl (SIP); prfiling Unique features f SIP fr interactive end-t-end cmmunicatins Vice, vide, presence, messaging, cnferencing and thers Independence frm Access Netwrk Applicatin platfrm itself is utside the scpe f IMS Applicatin platfrm IMS (SIP) IP transprt netwrk (IP-CAN) Clmb, Sri Lanka, 7-10 April

7 The central rle f 3GPP IMS in NGN Release 1 Architecture Advanced Architecture bjectives Cmprehensive set f services ver a unifying IP layer netwrk Services separable frm transprt stratum int service stratum Transprt stratum supprt f a multiplicity f access netwrks and a variety f mbile and fixed terminal types Services nt limited t thse prvided by the hme netwrk Services shall be able t traverse multiple prviders netwrks Abut IP Multimedia Subsystem (IMS) in NGN IMS was unanimusly agreed as central cmpnent in NGN Leveraging the 3GPP IMS capabilities but they need sme extensins ther functins still needed Y.2012 (NGN Rel.1 functinal requirements and architecture) Y.2021 (IMS fr NGN) Clmb, Sri Lanka, 7-10 April

8 Instantiatin f NGN reference pints Appendix III Y.2012 Applicatins Applicatins Applicatins ANI Service terminatin End-server functins Service Transprt terminatin End-user functins (including enterprise netwrks) Service terminatin UNI Service Transprt Transprt Service SVI: Server t netwrk interface NNI Other netwrks Service Transprt terminatin Transprt Transprt Transprt Transprt Y.2012(06)Amd1_FIII.1 Clmb, Sri Lanka, 7-10 April

9 Key architectural challenges Applicatin-driven QS: QS classes Explicit bandwidth selectin Mapping & Cntrl frm Service t Transprt Flw awareness (mnitring, accunting) Mbility Seamless handver Fixed Mbile Cnvergence (FMC) Scalability Multicast Ubiquitus netwrking Clmb, Sri Lanka, 7-10 April

10 Ubiquitus netwrking as a future target Which capabilities t enable Any Service, Any Time, Any Where, Any Device peratins using NGN Human-t-human, but als human-t-machine and machine-t-machine cmmunicatins Draft definitin f ubiquitus netwrking [Y.NGN- UbiNet] Ability fr all f bjects t cmmunicate and access services withut any restrictins at services, places, time, users, etc., in the cntext f the service(s) subscribed t Y.NGN-UbiNet - Overview and principles fr ubiquitus netwrking in NGN (wrk just started) Objectives f ubiquitus netwrking in NGN, fundamental characteristics and design principles including architectural mdel and enhanced capabilities Clmb, Sri Lanka, 7-10 April

11 Quality f Service (QS) High level bjectives in NGN Release 1 End-t-end QS envirnment fr the services ffered t end users via QS crdinatin acrss the transprt stratum NGN Release 1 shall prvide an initial set f requirements, architectures, mechanisms and guidelines t enable end-t-end QS Key items under study Dynamic QS cntrls, including Resurce and admissin cntrl Negciatin f QS requirements Interwrking f QS mechanisms Inter-dmain cnsideratins Framewrks aspects Perfrmance bjectives Netwrk perfrmance classes and allcatin Perfrmance measurement, management and predictin Aiming t develp a cmprehensive QS slutin allwing incremental deplyment Clmb, Sri Lanka, 7-10 April

12 Resurce and Admissin Cntrl (RACF) Applicatin-driven, plicy-based resurce management Bridging service cntrl and packet transprt t dynamically guarantee QS and enfrce certain netwrk security measures QS crdinatin in transprt stratum thrugh Access Netwrk, Cre Netwrk and ther NGNs Different mdes fr plicy cntrl Different resurce management methds measurement, reservatin Endpints f varius QS cntrl capabilities Relative and abslute QS, including pririty Existing and emerging QS transprt mechanisms Clmb, Sri Lanka, 7-10 April

13 Generic RACF architecture in NGN Y.2111 Service Cntrl Service Stratum Transprt Stratum Netwrk Attachment Cntrl Ru Rh RACF Rd Rp Rt TRC-FE Rs PD-FE Ri Other NGNs CGPE-FE Rn Rc TRE-FE Rw PE-FE CPN Transprt Decmpsitin f PD-FE (Plicy decisin functinal entity) and TRC-FE (Transprt resurce cntrl functinal entity) enables RACF t supprt a variety f access and cre netwrks (e.g. fixed and mbile access netwrks) within a general resurce cntrl framewrk. PE-FE (Plicy enfrcement functinal entity), packet-t-packet gateway at the bundary f different packet netwrks and/r between the CPN and access netwrk, is key injectin nde t enfrce dynamic QS and resurce cntrl, NAPT cntrl and NAT traversal. CGPE-FE (CPN Gateway Plicy Enfrcement Functinal Entity) in CPN enfrces transprt plicy rules fr upstream traffic instructed by PD-FE. TRE-FE (Transprt resurce enfrcement functinal entity) enfrces transprt resurce plicy rules instructed by TRC-FE at the technlgy-dependent aggregate level. Clmb, Sri Lanka, 7-10 April

14 QS challenges in custmer premise netwrk Desktp PC Desktp PC Netwrk Terminating Unit 10/100 Base-T Hme Gateway Custmer Premise Netwrk Set Tp Bx Televisin Other Devices, Appliances, etc Set Tp Bx. IP phne Televisin Hme Gateway issues and QS per device/terminal Clmb, Sri Lanka, 7-10 April

15 Mbility: a fundamental enabler f NGN Cmplex and hetergeneus envirnment Basic User Requirements Access frm a variety f envirnments with a variety f terminals with varying capabilities Glbal raming, and ubiquitus and seamless slutins Clmb, Sri Lanka, 7-10 April

16 Mbility dmains and types - Y.2011 Device mbility dmain User/service mbility dmain Netwrk Pints f attachment (POA) Telecmmunicatins bjects (mbile with transient binding t POA) Transient binding (mbile with transient binding t device/service) Clmb, Sri Lanka, 7-10 April

17 Other dimensins f mbility Mbility Service cntinuity Service discntinuity Seamless Handver Handver Nmadicity Prtability Q.1706/Y.2801 Clmb, Sri Lanka, 7-10 April

18 Limited Mbility bjectives in NGN Release 1 NGN Release 1 shall supprt Nmadism The ability t change netwrk access pint n mving, withut maintaining service cntinuity T be supprted between netwrks and within a netwrk But supprt fr service cntinuity is nt excluded N new interfaces defined fr Release 1 mbility Persnal mbility Terminal Mbility The initial step twards Generalized Mbility and Fixed Mbile Cnvergence Clmb, Sri Lanka, 7-10 April

19 MM functinal architecture Q.1707/Y.2804 Mbility management cntrl functin (MMCF) mdel MMCF functinal architecture in NGN Clmb, Sri Lanka, 7-10 April

20 Example f MMCF netwrk cnfiguratin Q.1707/Y.2804 Initial step f detailed functinal mapping within the NGN architecture framewrk is currently prgressing in Y.MMCF Architecture and functinal requirements fr management f lgical lcatin infrmatin and cntrl f mbility in NGN transprt stratum Clmb, Sri Lanka, 7-10 April

21 Twards Fixed Mbile Cnvergence: but which cnvergence? The multiple dimensins f cnvergence Cnverged services Service integratin (vice and multimedia, messaging, presence etc.) Cnverged service platfrm Cnverged netwrks Access and cre, incumbent and cmpetitive, wireline r wireless, VNO, ISPs and Bradband SPs Cnverged devices Phnes, smartphnes, PDAs, laptps, Cnverged management Seamless service prvisining Fixed Netwrk Mbile Netwrk IP Netwrk Crprate Netwrk Cable Netwrk Clmb, Sri Lanka, 7-10 April

22 Functinal scenaris f cnvergence - Q.1762/Y.2802 Charging and Billing Management Layer Fixed Netwr k Service Cntrl Applicatins Applicatin /Service Supprt Service Cntrl Mbile Netwrk Applicatin Layer Cntrl Layer Example f cnvergence at Applicatin/Service Supprt Fixed access netwrk Mbile access netwrk Cnvergence may be happen at different functinal levels Y.2802: FMC characteristics, requirements, capabilities and scenaris Clmb, Sri Lanka, 7-10 April

23 Security bjectives Address security dimensins Security Address security features required fr secure dmain intercnnectin Security dimensins and cuntered threats (ITU-T X.805 principles) Security threats and risks in NGN Security trust mdels Security architecture Security bjectives Requirements f NGN netwrk elements Cmmn requirements In Trusted Zne Netwrk brder elements CPE brder elements Objectives and reqts fr Emergency Telecm. Services Other security tpics: NGN Authenticatin and authrizatin requirements (Y.2702) AAA service in NGN (Y.2703) Onging: NGN Certificate Mgt, NGN Security mechanisms and prcedures, Mbility security framewrk in NGN, Secure slutins fr mbile cmmerce and banking Identity Management Security Requirements fr NGN Release 1 (Y.2701) Clmb, Sri Lanka, 7-10 April

24 Security f financial transactins future item Security slutins supprting scenaris where a mbile terminal serves as a payment r banking terminal, and NGN is used as transprt t carry transactin flws Related security issues include netwrk and interface functins t supprt transactin prtectin, privacy plicy, financial infrastructure prtectin, subscriber prtectin and identity management aspects Planned draft Recmmendatins Security requirements fr mbile financial transactins in NGN Architecture fr secure mbile financial transactins in NGN Clmb, Sri Lanka, 7-10 April

25 Identities are nt needed nly fr Users The figure belw shws examples f identities mapped int the NGN architecture Identities fr devices, netwrk elements, netwrk cmpnents, applicatins, service prviders etc. Applicatins Identities in applicatins User Identity Data Identities in NACF Legacy Terminals Legacy Terminals GW GW Service Stratum Applicatin Supprt Applicatin and Service Supprt S. User Prfile Access T. User Netwrk Attachment Prfile Cntrl Attachment (NACF) Other NGN Service Cmpnents PSTN / ISDN Emulatin Service Cmpnent IP M ultimedia IP M ultimedia Cmpnent &PSTN/ISDN Service Cmpnent Simulatin Resurce and Admissin Cntrl (RACF) Service Cntrl Other Netwrks Identities in IMS PES, and ther cmpnents Identity Interperability Identities in RACF User and terminal identities Custmer Netwrks NGN Terminals End-User * Access Transprt Netwrk Edge Cre Cre transprt Transprt Transprt Stratum Nte: Gateway (GW ) may exist in either Transprt Stratum r End-User. Netwrk elements identities Clmb, Sri Lanka, 7-10 April

26 Identity Management (IdM): a key nging activity Wrking definitin fr IdM (Q.16/13) Management by NGN prviders f trusted attributes f an entity such as a subscriber, a device r a prvider. This is nt intended t indicate psitive validatin f a persn. Challenges f identity infrmatin assurance, security and management End users are increasingly using multiple identities These identities may be assciated with differing cntexts and service privileges The identities may nly partially identify the end user The identities may be used anywhere, anytime The identities may nt be interperable between prviders Clmb, Sri Lanka, 7-10 April

27 NGN Identity Management framewrk - Y.2720 A structured apprach fr designing, defining, and implementing interperable Identity Management (IdM) slutins fr NGN Y.2720 identifies a set f capabilities e.g., administratin, discvery, cmmunicatin exchanges, crrelatin and binding, plicy enfrcement, authenticatin and authrizatin These capabilities allw assurance f identity infrmatin (e.g., identifiers, credentials, and attributes) allw assurance f the identity f an entity (e.g., users/subscribers, user devices, service prviders, and netwrk elements) supprt and enhance business and security applicatins Clmb, Sri Lanka, 7-10 April

28 Intercnnectin f NGN with ther netwrks Intercnnectin at Netwrk t Netwrk Interface Between multiple NGN dmains, between NGN and ther netwrks Tw types f Intercnnectin Cnnectivity-riented Intercnnect (CIx) is required Simple IP cnnectivity, irrespective f interperability levels N service awareness, n specific requirements assurance Service-riented Intercnnect (SIx) is nt precluded (R1) Services ffered with defined levels f interperability Surce fr figure: ETSI TISPAN Clmb, Sri Lanka, 7-10 April

29 SIX versus CIX Service Transprt Transprt Transprt Transprt Originating netwrk Service Originating netwrk Cnnectivity nly transit Hub Hub Service Terminating netwrk Transprt Transprt Transprt Transprt Service related transit Service Terminating netwrk CIX transit netwrk is an IP pipe Transit netwrk peratr nt aware f service SIX sessins ruted thrugh transit netwrk SIP prxies Transit netwrk aware f service Bth require a SIP NNI SIX enables transit netwrk t: Accunt + charge based n service (phne call, vide call etc.) Apply dynamic (transprt) resurce reservatin based n service Bth likely t c-exist CIX is a special case f SIX (with n interventin at the service layer) Different markets sme carriers will want t peer with a transit netwrk and accunt based n phne calls/sessins, thers will want t peer at IP level nly. Depends n pricing / revenue flw / traffic mix. GSMA IPX allws either pure L3 r Applicatin layer peering Clmb, Sri Lanka, 7-10 April

30 Intercnnectin capabilities and specificatins Intercnnectin capabilities (R1 bjectives) ruting; QS interwrking; signalling interwrking; numbering, naming and/r addressing interwrking; user and terminal prfile infrmatin exchange; media interwrking; accunting and charging related infrmatin exchange; security interwrking; management interwrking; plicy management ITU-T NGN NNI deliverables Q.3401 NGN NNI signalling prfile (prtcl set 1) SIP-NNI with cdecs/rtp prfiles rules and recmmendatins Includes ability t carry MIME encapsulated ISUP (SIP-I) Originally fr vice services nly recently amended fr vide/data services Q Interwrking between Sessin Initiatin Prtcl (SIP) and Bearer Independent Call Cntrl prtcl r ISDN User Part Nt an intercnnectin spec but useful in defining SIP-I Clmb, Sri Lanka, 7-10 April

31 Y.2233 Rev1 (nging): Y.2233 extensins t enable plicy-based accunting and charging capabilities in NGN Multiple relevant attributes fr plicy enabled charging and accunting access specific characteristics, bearer QS, service type, time, user subscriptin infrmatin, thers SCF B illing D m ain Cb Charging and Accunting Rs PD-FE Charging Gateway Functin Cc Charging C llectin Functin Cp R ating Functin Cr Inter-P rvider Charging Gateway F unctin Accunt M anagem ent Functin Cg O nline Ca Charging Functin Ci Other NGN Charging And Accunting Rw Ct C PE-FE Ce Charging Trigger Functin NGN Service Clmb, & Sri Transprt Lanka, 7-10 April

32 Numerus ther develpments ITU-T nging standards develpments address NGN capabilities in numerus ther technical dmains including Management, Migratin Perfrmance, measurement, testing IPv6 Hme netwrking Advanced service enablers and service riented infrastructure Enhanced access and cre transprt Emergency telecmmunicatins and accessibility And thers A glbal ITU standardizatin effrt fr an advanced telecmmunicatin infrastructure able t evlve and adapt t the emerging and varying requirements f the user cmmunity Clmb, Sri Lanka, 7-10 April

33 Thank yu fr yur attentin Questins? Clmb, Sri Lanka, 7-10 April