Dynamic hierarchical database architecture for location management in PCS networks
IEEE/ACM Transactions on Networking (TON)
New Caching-based Location Management Scheme in Personal Communication Systems
ICOIN '01 Proceedings of the The 15th International Conference on Information Networking
The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Second Edition
Efficient multimedia call delivery over IP-based heterogeneous wireless access networks
Proceedings of the 6th ACM international symposium on Mobility management and wireless access
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
Heterogeneous personal communications services: integration of PCS systems
IEEE Communications Magazine
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Next generation heterogeneous wireless networks are expected to interwork with IP-based infrastructures. The IP Multimedia Subsystem (IMS) is an open, standard based solution that merges the Internet with Third Generation (3G) cellular networks. Attainment of a unified logical database is one of the key aspects that promote deployment of IMS. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of signaling cost savings, hence a better delay performance.