Unified Mobility Management Architecture for NGN

1. Unified Mobility Management Architecture for NGN 2008. 12. 10. Kyounghee Lee (leekhe@etri.re.kr) Network Research Division

2. ITU-T MM Standardization Activities • Recommendations & Drafts

3. Next Step for MM? • MM JRG has produced 4 Recommendations in Stage 1/2 • MMR (Q.1705/Y.2801), MMF (Q.1707/Y.2804), LMF (Q.1708/Y.2805), HCF (Q.1709/Y.2806) • The scope was limited as “Terminal Mobility at Network Layer” • Current MM issues for NGN • Harmonization of MM framework and NGN-FRA r2 • Y.MMCF (Q3/13) is being positioned for this purpose • MM signaling & implementation details (Stage 3/4) • Q.NACF.mob (Q7/11) series are going on as the NACF functionality • MM signaling based on MMCF Architecture? • Advanced MM issues • Integration of MM architecture at different layers • Seamless & QoS-guaranteed mobility support • Integration of host-based & network-based MM approaches • Vertical handover support, etc.

4. Why Unified MM Architecture (UMA)? • Motivation • A unified MM architecture would be required to: • combine various MM approaches in ITU-T • accommodate de-facto SDOs’ MM architectures (3GPP, IETF, IEEE, …) • introduce advanced MM features into a single architecture • Design considerations of UMA • Addressing the scalability problem on MIP/PMIP-based solutions • Concretion of MMCF architecture • Signaling protocol & implementation scenario • Interworking with the other functions in NGN • Accommodation of 3GPP LTE/SAE architecture • Integration of IMS-based MM architecture • QoS guarantees with mobility support • Flow-based QoS control • QoS interworking between IP domain & RF domain

5. All-IP Converged Network (AIPCN) • UMA is being designed for MM in AIPCN • Definition of AIPCN • An IP-based Fixed/Mobile/Broadcasting converged network, which provides the service continuity to multimedia users independent of type, location and access technology of a mobile terminal • Service Continuity: Authentication, security, connection, QoS, policy • [Ref.] Definition of AIPN in 3GPP • A collection of entities that provide a set of capabilities for the provision of IP services to users based on IP technology where various access systems can be connected • QoS (e.g. End-to-end QoS, policy coordination) • Multiple Access System scenarios • Network/Domain/Access System Selection principles and policies • Mobility  enhancements • Network resiliency, redundancy  and reliability • Resource availability and optimization • Network management (e.g. ‘back-office’ considerations for new services) • Interoperability Service

6. High Level Requirements of UMA • Authentication continuity • Seamless AAA for network & services with a Single-Sign-On (SSO) • Security continuity • Transparent security service independent of access network & IP addressing scheme • Connection continuity • Provisioning of seamless IP connectivity for users moving among heterogeneous networks • QoS continuity • Seamless & adaptive QoS guarantees depending on the mobile users’ communication environment • Policy continuity • Integrity of user preference & service policy independent of a user’s location & terminal

7. Functional Requirements of UMA • Unified IP mobility control • Host-initiated+ Network-initiated • Multi-session mobility support • Authentication convergence • Access authentication + Mobility service authentication • Fast authentication with context-transfer • QoS guarantee • Flow-based QoS control over IP-in-IP encapsulation • Interworking between IP domain & RF domain QoS • Policy switching with user’s movement • Integration of IMS-based MM & IP-based MM • IP-based MM: M_NACF  MMCF  M_RACF • IMS-based MM: M_NACF  SCF  MMCF  M_RACF • Functional extensions required to RACF/NACF/SCF • Interworking with 3GPP network • Interwork with GPRS/SAE/LTE M_ : Mobility Support SCF : Service Control Function NACF: Network Attachment Control Function MMCF: Mobility Management & Control Function RACF: Resource Admission & Control Function

8. Unified IP Mobility Control (1/3) • High level architecture SCF U_MMCF M_RACF HBMC NBMC UE AR AR UE H/O H/O AR AR UE UE MobilityControl Sig. HBMC : Host-based Mobility Control NBMC : Network-based Mobility Control Call set-up/mobilityControl Sig. Data

9. Unified IP Mobility Control (2/3) • Functional description • Unified MMCF • Location management • Handover control • Separation of data & control planes • Single architecture to support both host-based & network-based MM • Integration of IP mobility & call/session mobility • IP mobility: transport stratum • Call/session mobility: service stratum • Seamless service provisioning with an integrated control • QoS policy switching • User preference & QoS policy are transferred with user’s movement • IP Addressing • Unique ID & Location ID based on IPv4/v6

10. Unified IP Mobility Control (3/3) • Overall framework IMGWF : Integrated Mobile G/W function EUF : End user function RRCF : Radio resource control function ATF : Access transport function AAA M_SCF • CDR mgt. for H/O Session • Dynamic awareness of IP-CAN • Converged Authentication M_NACF U_MMCF M_RACF • Host-based Access Authentication • I/F with U_MMCF • Unified mobility Control • Host-based + Net-based • I/F with M_RACF • HoA/CoA mgt. • Resource control for H/O session • Policy switching HBMC NBMC • 3G terminal mgt. • 3G tunnel info. mgt. • Tunnel interworking 3GPP–IP mobility IMGWF EUF RRCF ATF CTF • Radio resource inform. push to ATF • Flow QoS Control • Radio adaptive QoS • H/O control agent • H/O control agent

11. Thank You for Your Attention. (Q&A)