network-based mobility management in the evolved 3gpp core network

Network-Based Mobility Management in the Evolved 3GPP Core Network

Outline•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.

Proxy Mobile IPv6 (1/2)

Proxy Mobile IPv6 (2/2)•The local mobility anchor (LMA).•The mobile access gateway (MAG).

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(1/4)

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)

Non-optimized handovers (1/2)

Non-optimized handovers (2/2)

Optimized handovers(1/5)

Optimized handovers(2/5)•Mobility Management Entity (MME)•HRPD Access Network (HRPD AN)•HRPD Serving Gateway (HSGW)

Optimized handovers(3/5)•Pre-Registration•Preparation•Execution

Optimized handovers(4/5)

Optimized handovers(5/5)

conclusion

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.

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