cdma450 Core Network Betsy Kidwell Chair, 3GPP2 TSG-X Lucent Technologies CDMA450 Evolution Seminar Hosted by 3GPP2, CDG, and IA450 Warsaw, Poland 15 June 2004 1 Presentation Overview Network Evolution Drivers End User Needs Operator/Vendor Needs Network Evolution Goals IP Core Network Worldwide Roaming Security 3GPP2 Progress Harmonization Efforts MMD CDMA/GSM Roaming Services Conclusion 15 June Network Evolution Drivers End User Needs Voice Services High Speed Data Easy Operation Low Cost High Quality Bandwidth as appropriate Worldwide roaming Small/Multifunction device 15 June Network Evolution Drivers Operator/Vendor Needs Low cost of operation Protection against theft of service Profitable business Worldwide access for their customers via roaming or actual network Simple billing and collection More spectrum 15 June Network Evolution Goals IP Core Network Voice and data services VoIP High speed data transfer Internet access Ease of service introduction Lower maintenance Standard protocols and services Cross-technology interoperability 15 June Network Evolution Goals Worldwide Roaming CDMA/GSM circuit and packet roaming IP cdma2000 1 /UMTS roaming Cross-technology roaming (wireless/WLAN) Backwards compatible with legacy network (TIA-41, LMSD) 1 cdma2000 is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication), cdma2000 is a registered trademark of the Telecommunications Industry Association (TIA USA) in the United States. 15 June GPP2 Progress Harmonization Efforts with 3GPP Decided to harmonize IP Core Network in April 2002 Core network now virtually identical X.S v1.0 aligned with 3GPP Release 5 X.S0013-A v1.0 will align with 3GPP Release 6 Harmonization applies to services as well as core network MMS Push to Talk Presence Etc. 15 June Harmonized Architecture 3GPP3GPP2 15 June GPP2 Progress 3GPP2 Allows IPv4 Allows home P-CSCF address on MS (e.g. SIP URI, IP address) or use DHCP Allows PDSN and P-CSCF to be located in different networks (e.g., PDSN in visited network, P-CSCF in home network) Smart cards optional Allows HTTP digest authentication Other minor differences 3GPP Mandates IPv6 Special GPRS Procedure Requires GGSN and P-CSCF to be in the same network Smart cards required 3GPP2/3GPP Differences 15 June GPP2 Progress Harmonization Efforts with IETF Why Leveraging Internet products Easy to interwork with Internet services Flexible service creation How Close coordination with IETF on ID/RFC development 3GPP2/IETF Liaison IETF Dependency List Members actively participate in IETF Use of SIP, DIAMETER, IPv4, IPv6 15 June GPP2 Progress Harmonization Efforts with OMA Proposal to transfer network independent aspects of MMS to OMA On hold pending OMA IPR issue resolution Coordinated with similar transfer proposal from 3GPP Ongoing coordination on Presence Push to Talk IP based Location Services 15 June GPP2 Progress MMD Functional Entities Authentication, Authorization, Accounting (AAA) extension of the HLR to include user data for the IP Multimedia Subsystem Access from the CSCF uses IETF protocols (DIAMETER) Call Session Control Function (CSCF) provides call control functions Proxy CSCF SIP proxy server for the mobile, acting on behalf of the UE within IMS Forward messages between mobile and other SIP servers Serving CSCF SIP registrar, with cooperation from AAA (location server) Session control call state machine for the registered end-point Interaction with service platforms for service control, provides service triggers Interrogating CSCF Entry point from other networks Allocate or determine the S-CSCF May hide network topology 15 June GPP2 Progress MMD Architecture 15 June GPP2 Progress MMD Protocol Stack 15 June GPP2 Progress MMD High Level Call Flow 15 June GPP2 Progress Release A Features Harmonization across different access technologies (e.g., 3GPP, WLAN) Interworking between MMD and Internet Interworking between MMD and PSTN Presence Instant Messaging Conferencing Group management Interface between mobile and application server for service data management 15 June GPP2 Progress Evolution path to MMD Legacy MS Domain Support provides a step by step evolution path from existing circuit networks to All IP networks LMSD Step 1 (X.S v2.0) published March 2004 LMSD Step 2 (X.P v1.0) planned for publication 3Q04 MMD Release A (X.P0013-A v1.0) provides support for circuit/packet handoff with LMSD 15 June GPP2 Progress CDMA/GSM Roaming Approved X.S0023, Network Interworking between GSM MAP and TIA-41Networking, for publication in June 2004 One way and two way circuit based service roaming SIM based operations X.P0003, TIA/EIA-41-D Network Enhancements to Support CDMA SIM Roaming to GSM, approved for V&V in June 2004 TIA-41 specific enhancements for one way and two way roaming New project X.P0023-A, CDMA/GPRS Data Roaming, planned for publication 1Q05 Enhances current roaming capabilities to include packet data as well as circuit service 15 June GPP2 Services Presence 3GPP/3GPP2/OMA focused on SIP/SIMPLE for Presence and Instant Messaging SIP Subscribe/Notify and Message methods Watcher subscribes to presence events Work in progress SIP Publish to declare presence information XCAP to manage user data 15 June GPP2 Services Presence Architecture CSCFs serve as watcher/presentity proxies Network may update presentity (via AAA interface or presence user agent) IM Server and applications connect to CSCF proxies ( non-IMS/MMD implementations currently in use: Wireless Village SMS transport of AOL/Yahoo IM etc.) 15 June GPP2 Services Push to Talk (PTT) Several vendors have PTT solutions over cdma2000 1x networks ZTE (Gota) Huawei Kodiak (RTX) Motorola HP/Togabi (PocketCHAT) Qualcomm (QCHAT) Ericsson Push to Talk over Cellular (PoC) being addressed in OMA With 3GPP2 review and comment 15 June GPP2 Services Broadcast/Multicast Service (BCMCS) Supported for both 3G1X and HRPD systems Efficient use of radio resources when transmitting to multiple end users Operator has control over: Which programs are delivered to which part(s) of the network Billing of user/content provider Encryption of IP flows Service offerings Pay per view movies Sporting events Streaming data (e.g., stock values, traffic 15 June GPP2 Services BCMCS (continued) End user Needs a BCMCS capable device Subscription for/ad hoc access to BCMCS service Selects BCMCS programming (may be menu driven from device) Receives BCMCS programming Receives billing for BCMCS services 15 June GPP2 Services Multimedia Messaging Service (MMS) X.S v1.0 (parts 000, 200, 310, 311, 340, 370) published May 2003 Aligned with 3GPP Release 5 MMS Supports Stage 3s using OMA-WAP Inter-carrier Interworking VASP Interworking 15 June GPP2 Services High Level MMS Architecture 15 June GPP2 Services MMS Architectural Elements 15 June Conclusion Benefits of 3GPP2 Specifications Evolution path from circuit (TIA-41) networks to IP networks Standard service offerings Interoperability with other networks (e.g., GSM/UMTS, WLAN) Economy of scale with common platforms and protocols Support for inter-technology roaming (allows worldwide roaming) 15 June ACRONYMS 3GPP/2: 3rd Generation Partnership Project/2 AAA: Authentication, Authorization, and Accounting AKA: Authentication and Key Agreement AMR: Adaptive Multi-Rate AS: Application Server BCMCS: Broadcast Multicast Service BGCF: Breakout Gateway Control Function BSC: Base Station Controller BTS: Base Transceiver Subsystem CDMA: Code Division Multiple Access CS: Circuit Switched CSCF: Call/Session Control Function GGSN: Gateway GPRS Support Node GSM: Global System Mobile GSN: GPRS Support Node GPRS: General Packet Radio Service HSS: Home Subscriber Server I-CSCF: Interrogating CSCF IMS: IP Multimedia Subsystem IM: Instant Messaging IP: Internet Protocol MAP: Mobile Application Part MGCF: Media Gateway Control Function MGW: Media Gateway MMD: IP Multi-Media Domain MMS: Multimedia Messaging Service MRF: Multimedia Resource Function MS: Mobile Station MSC: Mobile Switching Center OMA: Open Mobile Alliance PCF: Packet Control Function P-CSCF: Proxy CSCF PDSN: Packet Data Serving Node PoC: Push-to-Talk over Cellular PS: Packet Switched PTT: Push-to-Talk QoS: Quality of Service RAN: Radio Access Network RLP: Radio Link Protocol RTP: Real-time Transmission Protocol S-CSCF: Serving CSCF SDP: Session Description Protocol SGSN: Serving GPRS Support Node SIP: Session Initiation Protocol UE: User Equipment UMTS: Universal Mobile Telecommunications System WCDMA: Wideband CDMA 15 June Supplementary Slides WLAN Security 15 June Wireless LAN Interworking Capability Four scenarios have been identified for the WLAN Interworking capability. Scenario 1: Common Billing and Customer Care Scenario 2: 3GPP2 System Based Access Control Scenario 3: Access to 3GPP2 Packet Data Services via the WLAN System Scenario 4: Session Continuity 15 June Wireless LAN Interworking Capability Phase 1 Efforts in 3GPP2 will focus on Scenarios 1 and 2. WLAN Interworking Requirements Document S.P0087 is under review and comment Stage 2 and Stage 3 text (X.P0028)is under development in 3GPP2 TSG-X WG3.1 with a scheduled completion of 2Q04. 15 June Wireless LAN Interworking Reference Model 3GPP2-WLAN Interworking Architecture for Scenario 2 15 June Wireless LAN Interworking Reference Model H-AAA: AAA in a home 3GPP2 Network. Authenticates and Authorizes the MS for access to the 3GPP2-WLAN interworking service. B-AAA: AAA in a broker network. An intermediate network between the WLAN and 3GPP2 home network. May be 0, 1 or more. W-AAA: The AAA in the WLAN, if available, interacts with the MSs H- AAA server to authenticate and authorize the MS for WLAN access. Database - The database is in the MSs 3GPP2 home network where authentication and subscriber service profile information is stored. WLAN: The Wireless Local Area Network supports types of accesses. It may support 802.1x and/or i. The topology of the WLAN is outside the scope of a 3GPP2 specification. 15 June Wireless LAN Interworking Capability Work is currently focused on choosing an Authentication and Key bootstrapping method for Authentication of a mobile accessing a WLAN and authenticated by a 3GPP2 system. Several authentication methods using EAP are under consideration as well as several keying methods. 15 June Network Security MMD Security Architecture Several Layers of Security Access Network Packet Data Network Mobile IP (if used) MMD Security Association MS to P-CSCF (TLS, Digest, IPSec) End-to-end Security (optional, not specified) MMD Security also includes network interfaces (CSCF-AAA) 15 June Network Security MMD Security Architecture