Skip to Main content Skip to Navigation

Enabling Roaming in Heterogeneous Multi-Operator Wireless Networks

Abstract : In a future, existing wireless access technologies such as WiFi (Wireless Fidelity), WiMAX (Worldwide Interoperability for Microwave Access) and UMTS (Universal Mobile Telecommunication System) will coexist on daily basis. Nevertheless, this daily coexistence does not imply that they will be able to fully interoperate. Thus, my research work focuses on a specific roaming scenario which is formed by heterogeneous wireless access networks managed by different operators. Our main objective is to provide a seamless (for the mobile user) roaming architecture to enable network interoperability under a heterogeneous multi-operator wireless environment, all this without major changes in current wireless architectures. In this regard, we also aim at reducing the roaming signaling exchange caused by the authentication and authorization mechanisms in the network registration and session initiation process while providing robust network security. The results obtained through computer simulation indicated that the use of our approach reduces significantly the network registration and session initiation delay, hence outperforming the traditional Roaming-SIP method. We also confirmed that the wireless delay introduced by the VN increases considerably when increasing the traffic congestion level in the Visiting Networks. Thus, from the simulations results we can state that by reducing the signaling message exchange, and maintaining acceptable congestion levels in the wireless network, hence reducing the wireless transmission delay, we can improved the overall de-lay in both network registration and session initiaition process
Document type :
Domain :
Complete list of metadata

Cited literature [46 references]  Display  Hide  Download
Contributor : Ecole Télécom ParisTech Connect in order to contact the contributor
Submitted on : Wednesday, July 7, 2010 - 8:00:00 AM
Last modification on : Friday, July 31, 2020 - 10:44:05 AM
Long-term archiving on: : Thursday, December 1, 2016 - 5:59:16 PM


  • HAL Id : pastel-00003796, version 1



Oscar Salazar Gaitan. Enabling Roaming in Heterogeneous Multi-Operator Wireless Networks. domain_other. Télécom ParisTech, 2007. English. ⟨pastel-00003796⟩



Record views


Files downloads