A new paradigm vertical handoff algorithm in CDMA-WLAN integrated networks

Authors:
Kyung-Soo Jang;Jang-Sub Kim;Jae-Sang Cha;Dong-Ryeol Shin
Affiliations:
School of Computer Information, Kyungin Women's College, InCheon, Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Korea;Dept. of Information and Communication Engineering, Seokyeong University, Seoul, Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Korea
Venue:
KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part II
Year:
2005

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Abstract

The integration of WLANs and CDMA networks has recently evolved into hot issue. We propose a vertical handoff algorithm between WLAN and CDMA network. A handoff initiation is decided by the received signal strength (RSS). To reduce the unnecessary handoff probability, we also consider a distance. As a mechanism of network selection, we propose a context based network selection algorithms between WLAN to CDMA network, based on wireless channel assignment such as dropping probability, blocking probability, GoS (Grade of Service), the number of handoff attempts. 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.