Network-based mobility management in the evolved 3GPP core network

Authors:
Irfan Ali;Alessio Casati;Kuntal Chowdhury;Katsutoshi Nishida;Eric Parsons;Stefan Schmid;Rahul Vaidya
Affiliations:
Motorola Inc.;Alcatel-Lucent;Starent Networks;NTT DoCoMo Inc.;Nortel Networks;NEC Europe Ltd.;Samsung India Software Operations
Venue:
IEEE Communications Magazine
Year:
2009

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Abstract

A key aspect of the 3GPP system architecture evolution is the specification of an evolved packet core that supports multiple access networks. The EPC enables operators to deploy and operate one common packet core network for 3GPP radio accesses (E-UTRAN, UTRAN, and GERAN), as well as other wireless and wireline access networks (e.g., eHRPD, WLAN, WIMAX, and DSL/Cable), providing the operator with a common set of services and capabilities across the networks. A key requirement of the EPC is to provide seamless mobility at the IP layer as the user moves within and between accesses. This article provides an overview of the EPC specifications that use a network-based mobility mechanism based on Proxy Mobile IPv6 to enable mobility between access networks. An important facet of providing seamless mobility for a user's sessions across technologies is to ensure that quality of service is maintained as the user moves between accesses. An overview of the "off-path" QoS model to supplement PMIPv6 is also provided.