QoS Based Call Admission Control in 802.11e Enhanced Distributed Coordinate Access Communication System

• Main Authors: Yung-Lan Tseng, 曾勇嵐
• Other Authors: ChingYao Huang
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/12346524329643028455

碩士 === 國立交通大學 === 電子工程系所 === 94 === How to fulfill the QoS of different kinds of services is getting more and more important with the increasing demands of WLAN system. Although different applications have different priority settings under the definition of IEEE 802.11e spec, the contention process still disturbs hard QoS guarantee in EDCA. In this thesis, Virtual traffic source estimation (VTSE) algorithm is proposed to judge the access request of a new real-time service by estimating the impacts of the new real-time service and the system loading. By using VTSE, WLAN system can protect real-time services’ QoS effectively. A bandwidth reservation algorithm is also proposed to implement with VTSE to prevent the impacts of non-real-time services.