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Services in UMTS Networks per. johansson@ericsson. com Rev PA 1 2/25/02 1 Services in UMTS Networks per. [email protected] com Rev PA 1 2/25/02 1

Outline • UMTS Architecture Overview • GPRS Mobility and Roaming • GPRS Qo. S Outline • UMTS Architecture Overview • GPRS Mobility and Roaming • GPRS Qo. S • IP Multimedia Subsystem • Home Network Environment • Open Service Access -- OSA • Relation to ISP structure Rev PA 1 2/25/02 2

UMTS Architecture Overview • An implementation of the IMT-2000 requirements – WCDMA radio access UMTS Architecture Overview • An implementation of the IMT-2000 requirements – WCDMA radio access – Higher rates and Qo. S • Major effort: Provide Internet oriented services! – SIP based multimedia support – Open interfaces • Modular approach – Allows for independently evolving network components • Physical entities grouped into Domains • Grouping of protocols offer services in Strata – Provided by one or several domains Rev PA 1 2/25/02 3

UMTS Architecture - (Physical) Domains • Subscription Mgmt • Home Services E 2 E UMTS Architecture - (Physical) Domains • Subscription Mgmt • Home Services E 2 E Applications TE Radio Access MT Rev PA 1 • Routes Calls/Data E 2 E • Local Services • Radio Resource Mgmt • Core Network Access 2/25/02 • Data transport to remote party • Non-user specific information 4

Network Strata…what’s that? • A (telecom? ) way to abstract the notion “networks of Network Strata…what’s that? • A (telecom? ) way to abstract the notion “networks of networks” • Stratified Reference Model -- SRM 7 Example: 6 5 4 IP Network Stratum n-1 Network Stratum n-2 ATM VP/VC Network n-1 connectivity Network n-2 connectivity Link functions Infrastructure n-1 Infrastructure n-2 Network n Network Stratum n Network n connectivity Network n-1 Network n-2 Rev PA 1 2/25/02 5 SONET/SDH Etc. . . DWDM

Strata -- Functional Aspects of UMTS Stratum: Grouping of protocol layers providing a specific Strata -- Functional Aspects of UMTS Stratum: Grouping of protocol layers providing a specific service • Authentication • Mobility Mgmt • Billing/charging • Home specific services • Routing from source to destination • Mobility Mechanisms • Telecom services (local/generic) • Transport user/signaling data • ARQ FEC • Data adaptation for network access • Access technique specific functions Rev PA 1 2/25/02 6

Application Stratum • Applications provided to the end user • Applications may be within Application Stratum • Applications provided to the end user • Applications may be within or outside the scope of UMTS • PS and CS based applications Note! Rev PA 1 2/25/02 7

Packet Switched and Circuit Switched Domains • • One PLMN (Public Land Mobile Network) Packet Switched and Circuit Switched Domains • • One PLMN (Public Land Mobile Network) is One Mobile Operator Migration from GSM to UMTS crucial Coexistence over long period foreseen Multimode mobile equipment PS Domain GSM BSS Home Domai n ME CS Domain UMTS RNS (UTRAN) Rev PA 1 PDN (e. g. IP Network) 2/25/02 8 Core Network PSTN

GPRS -- Generic Packet Radio Service • • • Introduces Packet Switching to Cellular GPRS -- Generic Packet Radio Service • • • Introduces Packet Switching to Cellular Networks -- the 3 GPP way! Concept: Hide cellular specifics from the legacy PS (PDN) domain Migrate from GSM to UMTS access with the same GPRS Core Network Use legacy PDN as infrastructure for the CN Many design decisions made “pre-Internet boom” -- IP not given! Rev PA 1 2/25/02 10

GPRS user plane for GSM and UMTS access GSM UMTS Rev PA 1 2/25/02 GPRS user plane for GSM and UMTS access GSM UMTS Rev PA 1 2/25/02 11

GPRS Mobility GTP Tunnels redirect traffic! Rev PA 1 2/25/02 12 GPRS Mobility GTP Tunnels redirect traffic! Rev PA 1 2/25/02 12

GPRS Roaming: two alternative ways “Home” Services • ISP Roaming – – ISP Visited GPRS Roaming: two alternative ways “Home” Services • ISP Roaming – – ISP Visited GGSN the network access Services Internet based Gives more optimal routing No static IP addresses ISP • PLMN Roaming – – – Home GGSN the network access Operator based services. Collection of charging data in home PLMN Additional screening in Home GGSN Access to all services and networks that are available in the Home network – Needs Inter-PLMN GPRS Backbone Network for GTP tunnels Home Services Local Services ME PLMN B Rev PA 1 2/25/02 13

PLMN Roaming: GPRS Roaming e. Xchange -- GRX PLMN 1 (Home) GGSN BG DNS PLMN Roaming: GPRS Roaming e. Xchange -- GRX PLMN 1 (Home) GGSN BG DNS R GRX PLMN 2 (Visited) PLMN 3 R R BG DNS Roaming Agreement SLA Roaming Agreement ME PLMN 1 • Provides secure and Qo. S based (VPN) operator roaming (GTP tunneling) • . gprs root DNS services • BGP-4 routing (PLMN=AS) • Support for peering: p 2 p Roaming Agreements still needed. BG SLA DNS SLA Roaming Agreement SGSN Rev PA 1 SGSN 2/25/02 14

Roaming Brokering PLMN 1 (Home) GGSN BG DNS • Centralized handling of roaming relations Roaming Brokering PLMN 1 (Home) GGSN BG DNS • Centralized handling of roaming relations • Broker acts as full HPLMN and VPLMN w. r. t. contractual relationship. • Peered roaming big hurdle for new operators • Claim: Enables 3 G roaming to scale • Claim: Brokering enables fast time-to-market • Example: Comfone/Infonet => [GRX on IPo. ATM backbone, Roaming Agreement support services, Roaming Brokering] Roaming Agreement SLA R GRX PLMN 2 (Visited) R BG DNS ME PLMN 1 BG SLA DNS SLA Roaming Broker Roaming Agreement SGSN Rev PA 1 PLMN 3 R 2/25/02 Roaming Agreement 15 SGSN

Global GRX network • Next level of peering GRX-GRX • Biggest peering point AMS-IX Global GRX network • Next level of peering GRX-GRX • Biggest peering point AMS-IX • Now 17 GRXes: Aicent, Belgacom, Cable & Wireless, Carrier 1, Comfone/Infonet, Deutsche Telekom, Ebone, Energis, France Telecom, Global Crossing, KPNQwest, Sonera/Equant, Telecom Italia, Telenor, Telia, Operator A Telecommunications Services Inc, World. Com BG GGSN GRX R R R DNS. gprs GRX R R GRX R Operator C R SGSN 2/25/02 R BG DNS Rev PA 1 DNS SGSN DNS Operator C DNS BG GPRS Peering Network R BG Operator C 16 DNS

UMTS Qo. S Architecture • End-to-End approach External IP Qo. S (e. g. RSVP/Diffserv) UMTS Qo. S Architecture • End-to-End approach External IP Qo. S (e. g. RSVP/Diffserv) UMTS Qo. S Rev PA 1 2/25/02 17

IP vs. UMTS Qo. S • • Policy Enforcement Point • UMTS Qo. S IP vs. UMTS Qo. S • • Policy Enforcement Point • UMTS Qo. S classes Diffserv edge function RSVP sender/receiver proxy Mapping between IP and UMTS bearer Qo. S – – Rev PA 1 2/25/02 18 Conversational class Streaming class Interactive class Background

IP Multimedia (IM) Domain • Support for real time multimedia services • Combined support IP Multimedia (IM) Domain • Support for real time multimedia services • Combined support from PS and CS bearer services IM Domain PS Domain GSM BSS Home Domai n ME Core Network CS Domain UMTS RNS (UTRAN) Rev PA 1 PDN (e. g. IP Network) 2/25/02 19 PSTN

IP Multimedia Subsystem • SIP based signaling • Separate overlay network for MM support IP Multimedia Subsystem • SIP based signaling • Separate overlay network for MM support Rev PA 1 2/25/02 20

UMTS Virtual Home Environment • • • Provides portability for the Personal Service Environment UMTS Virtual Home Environment • • • Provides portability for the Personal Service Environment Users presented with same personalized features regardless of network and terminal VHE components – – *CAMEL: User Profile Generic Qo. S bearer services Call control (e. g. IMS) Service Toolkits • CAMEL* (IN in GSM) • OSA (API for 3 rd party service development) Customized Application for Mobile Network Enhamced Logic Rev PA 1 2/25/02 21

User Profile(s) • The user profile aspects – – – – Classification (personal and User Profile(s) • The user profile aspects – – – – Classification (personal and service specific) Location and distribution Mgmt and access Policies Synchronization Security and privacy Format Rev PA 1 2/25/02 22

3 G Operator’s “Export Products” • • What have 3 G operators to offer 3 G Operator’s “Export Products” • • What have 3 G operators to offer Service Providers? 3 rd party involvement of Internet based service providers seen as essential for Offered: growth “Basic” Services RAN MS Core Network GPRS Rev PA 1 • Large customer base! • IP connectivity • Controlled Qo. S (MM apps etc. ) • User location (geographic, network) • Global Mobility and Roaming • VHE • Security • Application based charging • VPN access In return: Service & Application providers “Internet” • Reach internet content • Shared risks • Faster application development • Reach customers via other ISPs (accesses) 2/25/02 23

How to “export” the “ 3 G functionality package”? • The IN way too How to “export” the “ 3 G functionality package”? • The IN way too expensive. . . – Compare number of SS 7 developers with Java/HTML developers! • IP transport and open interfaces enables – Shared computing platforms for telecom and Internet applications – Shared (IP) infrastructure – Integration of IDCs and telecom hotels (Note! Still Carrier Class performance and availability) – Globally distributed “Home” servers… • => Expected to give fast and cheap development for 3 G applications! Rev PA 1 2/25/02 24

OSA - Open Service Access • Part of the “Virtual Home Environment” • Open, OSA - Open Service Access • Part of the “Virtual Home Environment” • Open, standardized API for 3 rd party application developers – Developed in the Parlay group • “Exports” typical Mobile Network Functionality – Call control, UMTS Qo. S – User location, Terminal capabilities – Content based charging Rev PA 1 2/25/02 25

OSA - Open Service Access Applications: • VPN • Conferencing • Location based applications OSA - Open Service Access Applications: • VPN • Conferencing • Location based applications • …. Framework mechanisms: • Authentication • Discovery of service capabily features Rev PA 1 Network Service Capability Features: (Abstractions of network functionality) • Call control • User location • Terminal capabilities • Charging 2/25/02 26

OSA and Server distribution • • • Actual servers and the SCS may be OSA and Server distribution • • • Actual servers and the SCS may be distributed Optional to run on the same physical server or in one or more separate Implications for application server placement in the network? Rev PA 1 2/25/02 27

So does all this fit into an Internet Service Architecture? Cable Modem Premisesbased Access So does all this fit into an Internet Service Architecture? Cable Modem Premisesbased Access Networ ks Transit Net Premisesbased Core Networks Transit Net WLAN Operatorbased Cell H. 323 Data Regional Voice Rev PA 1 Analog Transit Net Public Peering 2/25/02 PSTN 28 LAN Private Peering Internet Datacenter NAP LAN RAS H. 323 Data Voice DSLAM Wireline Regional

GPRS operators -- MO needs to adapt to this GPRS operator S PS CN GPRS operators -- MO needs to adapt to this GPRS operator S PS CN service/content cacheing hosting G FW FW FW data center IX service network e. g. , modem pool or CATV backbone provider FW access operator OSA “Exported”? backbone provider service/content backbone provider cacheing hosting IX GPRS operator The NO service/ content service network FW S PS CN Rev PA 1 data center GPRS operator FW link FW G S 2/25/02 FW PS CN 31 G BGP-relation

Issues • Performance implications on GTP tunneling and IMS backbone VPNs? • Will application Issues • Performance implications on GTP tunneling and IMS backbone VPNs? • Will application developers buy into the OSA idea? • How easy will it be for current SPs to offer applications to mobile customers? – Can OSA be easily distributed? • Alternatives? – Direct Internet access from mobiles… – Service adaptation in overlay networks • Mobile IP? • Specialized Radio Qo. S overlay support network? Rev PA 1 2/25/02 34