Performance of Adaptive Hysteresis Vertical Handoff in Heterogeneous Networks of WCDMA and WLAN Systems

• Main Authors: Chin-Wei Hsu, 許晉維
• Other Authors: Cheng-Hsiung Hsieh
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/37911205775919539928

碩士 === 朝陽科技大學 === 資訊工程系碩士班 === 97 === This thesis explores the performance of adaptive vertical handoff schemes for overlaid WCDMA and wireless LAN (WLAN) heterogeneous networks. We propose an adaptive hysteresis vertical handoff scheme to effectively adjust the hysteresis to compromise the handoff rate and bandwidth. Simulation results show that the proposed Adaptive hysteresis Vertical (AHYV) handoff scheme can increase lots of average data rate than the fixed hysteresis vertical handoff scheme. Furthermore, with quality of service (QoS), we model three service by video, talk and internet services. Moreover, for three type mobility users with0, 10 and 60(km/hr), we design QoS based AHYV (QAHYV) schemes to compromise the handoff rate and system bandwidth. Simulation results show that the proposed QAHYV can not only reduce the handoff rate but also maintain the demanded QoS bandwidth for different mobile users.