A flexible bound admission control algorithm for vertical handover in ubiquitous environment

Authors:
Jong Min Lee;Ok Sik Yang;Seong Gon Choi;Jun Kyun Choi
Affiliations:
Information and Communications University (ICU), Daejeon, Republic of Korea;Information and Communications University (ICU), Daejeon, Republic of Korea;Chungbuk National University (CBNU), Chungbuk, Republic of Korea;Information and Communications University (ICU), Daejeon, Republic of Korea
Venue:
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
Year:
2006

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Abstract

In this paper, we present FBAC (Flexible Bound Admission Control) algorithm using softness profile to reduce handover blocking probability over WLAN and WAAN (Wide Area Access Network). FBAC algorithm utilizes dynamic resource allocation scheme to decrease the blocking probability of vertical handover connections within the limited capacity of system. Based on FBAC algorithm, we derive the handover blocking probability as new traffic load and handover traffic load increase. In order to evaluate the performance, we compare FBAC algorithm against traditional non-bounded and fixed bound schemes. Numerical results show that the FBAC scheme improves handover blocking probability in ubiquitous environment.