1. Unified Mobility Management Network Research Division
Architecture for NGN
Kyounghee Lee
Network Research Division

2. ITU-T MM Standardization Activities
Recommendations & Drafts
Group
Scope
Recommendations/Drafts
Status
MM JRG
(Q2/19 + Q6/13)
MM Requirements (Stage 1) & Framework (Stage 2) for NGN
Q.1705/Y.2801 (MM Requirements for NGN)
In Force, Nov. 2006
Q.1707/Y.2804 (Generic Framework of MM for NGN)
Approved, Feb. 2008
Q.1708/Y.2805 (Framework of Location Management for NGN)
Q.1709/Y.2806 (Framework of Handover Control for NGN)
Approved, Oct. 2008
Q.SMF (Framework of MM in Service Stratum for NGN)
Q.MM-WAU (MM for Interworking between WiMAX and UMTS)
Q.MM-VPN (MM Architecture & Scenarios for Mobile VPN Services)
Working Draft
Q3/13
Mobility Management & Control Function (MMCF) Architecture in NGN
Y.MMCF (Mobility Management & Control Framework and Architecture within the NGN Transport Stratum)
Q2/13
MPLS-based MM Architecture
Y.2807 (MPLS-based MM for NGN services)
AAP consented, Sep. 2008
Q7/11
NACF-related NGN MM protocols
Q.NACF.mob0 (NACF Signalling Requirements & Architecture for Nomadism)
Q.NACF.mob1 (L2/L3 Interworking Issues in NACF)
Q.NACF.mob2 (Signalling Requirements & Architecture of NACF for IPv6 Mobility)

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 UE AR
H/O
Mobility Control Sig.
Call set-up/mobility Control Sig.
Data
HBMC
NBMC
HBMC : Host-based Mobility Control
NBMC : Network-based Mobility Control

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

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