P-MIP: paging extensions for mobile IP
Mobile Networks and Applications - Analysis and Design of Multi-Service Wireless Networks
A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next-Generation Wireless Systems
IEEE Transactions on Mobile Computing
IEEE Wireless Communications
A survey of mobility management in next-generation all-IP-based wireless systems
IEEE Wireless Communications
A dynamic location management scheme for next-generation multitier PCS systems
IEEE Transactions on Wireless Communications
VEPSD: a novel velocity estimation algorithm for next-generation wireless systems
IEEE Transactions on Wireless Communications
Interworking and interoperability issues for North American PCS
IEEE Communications Magazine
Challenges in the migration to 4G mobile systems
IEEE Communications Magazine
Interworking architectures for IP multimedia subsystems
Mobile Networks and Applications
LCSCW2: an architecture for IP multimedia subsystems
The Fourth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness & Workshops
A Provable Billing Protocol on the Current UMTS
Wireless Personal Communications: An International Journal
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Current wireless world witnesses multiple heterogeneous systems such as Bluetooth, IEEE 802.11, UMTS, and satellite networks. These systems are envisioned to coordinate with each other to provide ubiquitous communications to mobile users. A novel architecture, Architecture for ubiquitous Mobile Communications (AMC), is introduced in this paper that integrates these heterogeneous wireless systems. AMC eliminates the need for direct Service Level Agreements (SLAs) among service providers by using a third party, Network Inter-operating Agent (NIA). Instead of developing a new architecture, AMC extends the existing infrastructure to integrate heterogeneous wireless systems. It uses IP as the inter-connection protocol to provide transparency to the heterogeneities of individual systems. Third-party-based authentication and billing algorithms are designed for AMC. New handoff management protocols are also designed to support seamless vertical handoffs between different wireless systems in AMC. Performance analysis is carried out to determine the latency associated with vertical handoffs and the load on the NIA that arises because of these vertical handoffs. Toward this, a network deployment scenario that consists of three types of wireless systems: WLAN, 3G, and satellite networks is considered. Moreover, the number of SLAs required in AMC is also determined for a given number of network operators. It is also shown that by using hierarchical structure, AMC can realize the integration of heterogeneous wireless systems around the globe.