Simplified Handover Procedure for Seamless Roaming Across 4G Heterogeneous Networks
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Abstract
This paper presents a simplified handover procedure (SHP) which enables the users to freely and securely move across different network architectures. The user does not require any additional permission for roaming. Seamless roaming across different access systems in a multi-operator environment with different facilities is made possible by this approach. The proposed SHP demonstrates seamless roaming, network provisioning, mobility and security context transfer between existing networks. The SHP contains three different entities to ensure seamless roaming across different networks. Signaling agent (SA) which act as a gateway between different network systems in the interworking. The SA can be implemented as a separate entity or integrated with existing networks. The link agent (LA) is an intermediate agent for interconnecting access networks of different independent operators. It is an independent entity located outside the 3GPP core network and can be deployed by network operators and providers. The processing agent (PA) handles the handover effectively.
Keywords: seamless roaming, security, handover control, mobility
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