ISSN : 1796-2056
Volume : 2    Issue : 6    Date : December 2007

Reliable Integrated Architecture for Heterogeneous Mobile and Wireless Networks
Christian Makaya and Samuel Pierre
Page(s): 24-32
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The major trend in next-generation or 4G wireless networks (NGWN/4G) is the coexistence of
diverse but complementary architectures and wireless access technologies. In this context, an
appropriate integration and interworking of existing wireless networks are crucial to allow seamless
roaming across those networks. Several integrated architectures have been proposed for 3G
cellular networks and wireless local area networks (WLANs) by both third generation wireless
initiatives, 3GPP and 3GPP2. However, the proposed architectures have several drawbacks, the
most significant being the absence of quality of service (QoS) guarantees, seamless roaming and
service continuity. This paper proposes a novel architecture, called Integrated InterSystem
Architecture (IISA), which enables the integration and interworking of various wireless networks and
hide their heterogeneities from one another. The IISA architecture aims provisioning of guaranteed
seamless roaming and service continuity across different access networks. Performance
evaluation shows that IISA together with the proposed handoff management scheme provide
significant gains than existing interworking architectures and mobility management protocols.

Index Terms
Interworking architecture, seamless roaming, mobility management, quality of service.