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•Introduction•Proxy Mobile IPv6•IP-based mobility management•The PMIPv6-based mobility architecture
of the evolved packet system•Non-optimized handovers•Optimized handovers•conclusion
Introduction
•This article provides an overview of the evolved packet core (EPC) specifications that use a network-based mobility mechanism based on Proxy Mobile IPv6 (PMIPv6) to enable mobility between access networks.
IP-based mobility management
•Network-based mobility management ex: PMIPv6•Client-based mobility management ex: MIP, MIPv6
The PMIPv6-based mobility architecture of the evolved packet system(2/4)
•User Equipment (UE)•Packet Data Network Gateway (PDN GW)•Serving Gateway (S-GW)•ACCESS Gateway (A-GW)•Evolved Packet Data Gateway (ePDG)
The PMIPv6-based mobility architecture of the evolved packet system(3/4)
•Support of IPv4 UE.•Simultaneous access to multiple PDNs.•Support for overlapping address spaces of
different PDNs.•Unique UE identification across accesses
on EPC PMIPv6 interface.•Providing a PDN GW address to the target
access.
The PMIPv6-based mobility architecture of the evolved packet system(4/4)
•Subscription Profile Repository (SPR)•Policy and Charging Rules Function
(PCRF)•Policy and Charging Enforcement
Function (PCEF)•Bearer Binding and Event Reporting
Function (BBERF)
Optimized handovers(2/5)
•Mobility Management Entity (MME)•HRPD Access Network (HRPD AN)•HRPD Serving Gateway (HSGW)
佳句•The EPC assigns to the UE an IP address
that belongs to the PDN to which it is connected and allows the UE to simultaneously access multiple PDNs.