Intelligent seamless vertical handoff algorithm for the next generation wireless networks
Proceedings of the 1st international conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications
A dynamic network discovery and selection method for heterogeneous wireless networks
International Journal of Internet Protocol Technology
Heterogeneous Wireless Networks: Configuration and Vertical Handoff Management
Wireless Personal Communications: An International Journal
Performance of an adaptive timer-based handoff scheme for wireless mobile communications
ISCGAV'10 Proceedings of the 10th WSEAS international conference on Signal processing, computational geometry and artificial vision
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The integration of WLANs and CDMA networks has recently evolved into hot issue. We propose a vertical handoff algorithm between WLAN and CDMA network. In this algorithm, a vertical handoff is classified into handoff decision making and MIP (Mobile IP) registration process. Then, a handoff initiation is decided by the received signal strength (RSS). To reduce the unnecessary handoff probability, we consider a handoff initiation model based on the criteria of RSS. As a mechanism of network selection, we also propose a context based network selection and the corresponding algorithms between WLAN to CDMA network, based on wireless channel assignment. We focus on a handoff initiation criteria which uses both the RSS and the network selection method which uses context information such as dropping probability, blocking probability, GOS (Grade of Service), velocity. As a decision making criterion, velocity threshold is determined to optimize the system performance. The optimal velocity threshold is adjusted to assign available channels to the mobile stations. The proposed scheme is validated by computer simulation.