naa a22 4500 510794831 CHVBK 20180411083332.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11277-012-0670-y doi (NATIONALLICENCE)springer-10.1007/s11277-012-0670-y A Simple Analytical Model for Expected Frame Waiting Time Evaluation in IEEE 802.11e HCCA Mode [Elektronische Daten] [Aphirak Jansang, Anan Phonphoem] IEEE 802.11e standard defines two access modes to provide Quality of Service support for 802.11-based Wireless LANs: Enhanced Distributed Channel Access and HCF Controlled Channel Access (HCCA). Only HCCA can guarantee bandwidth per flow which is suitable for various multimedia application requirements. However, the reference scheme HCCA is designed without awareness of variable bit rate (VBR) transmission. Several enhancement techniques have been proposed to address the VBR problem, but there are few research results for a model to capture the characteristics of HCCA. In this paper, an analytical model for the expected packet waiting time is proposed. The model can capture the system behavior per session leading to suitable admission control process for VBR support. The proposed model has been validated using the Network Simulator. The results confirm that the reference admission control scheme with mean data rate acceptance cannot guarantee the required bound on waiting time. Using the model, suitable parameters can be investigated for admission control with VBR support. The model can also be applied with polling based technologies, such as WiMAX. Springer Science+Business Media, LLC., 2012 IEEE 802.11e nationallicence Quality of service nationallicence HCCA nationallicence Admission control nationallicence Expected waiting time nationallicence Jansang Aphirak Department of Computer Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Rd, 10900, Chatuchak, Bangkok, Thailand aut Phonphoem Anan Department of Computer Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Rd, 10900, Chatuchak, Bangkok, Thailand aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1899-1924 0929-6212 69:4<1899 2013 69 11277 https://doi.org/10.1007/s11277-012-0670-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0670-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jansang Aphirak Department of Computer Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Rd, 10900, Chatuchak, Bangkok, Thailand aut NATIONALLICENCE 700 1- Phonphoem Anan Department of Computer Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Rd, 10900, Chatuchak, Bangkok, Thailand aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1899-1924 0929-6212 69:4<1899 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer