Decentralised secure handover in IMS-based networks

Authors:
Wei-Kuo Chiang;Po-Chiang Kuo
Affiliations:
Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan;Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan
Venue:
International Journal of Ad Hoc and Ubiquitous Computing
Year:
2012

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Abstract

This paper proposes a decentralised secure handover scheme for service continuity in IP Multimedia Subsystem (IMS)-based networks: Decentralised Service Continuity (DSC). The novelty of the DSC is that the Proxy Call and Session Control Function (P-CSCF) in IMS is enhanced as a distributed Application Server (AS) with third-party call control (3PCC) for handling the handover. Moreover, the DSC integrates a secure context transfer mechanism to the P-CSCF to get the context information of a newly attached User Equipment (UE) and guarantee the confidentiality and the integrity. The DSC could shorten the IMS transmission latency significantly and reduce UE power consumption, as compared with the standard IMS-based service continuity and the Mid-Session Macro-Mobility (MSM).