A History based Adaptive Bandwidth Reservation and Admission Control Mechanism in QoS-Sensitive Cellular Networks

• Main Authors: Yi-Lun Chen, 陳逸倫
• Other Authors: Yaw-Chung Chen
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/91914573728716339319

碩士 === 國立交通大學 === 資訊工程系 === 91 === Nowadays, how to provide continuity and keep Quality-of-Service (QoS) guarantee during the handoff period of a mobile host is an crucial issue multimedia wireless communications. In general, a forced termination is very objectionable for users and considered as more serious than a new-call blocking. Therefore, to avoid handoff dropping is an important topic that needs further investigation. In this thesis, we propose call admission control schemes that adaptively reserve resource for handoff calls in order to keep the handoff dropping probability below a certain level. In these methods, bandwidth reservation is based on the collected history record in each base station and the mechanism is dynamically adjustable. Simulation results show the satisfactory data in new-call blocking probability, handoff-call dropping probability, system utilization and complexity.