A Call Admission and Rate Control Scheme for Multimedia Support over IEEE 802.11 Wireless LANs

Authors:
Hongqiang Zhai;Xiang Chen;Yuguang Fang
Affiliations:
University of Florida;University of Florida;University of Florida
Venue:
QSHINE '04 Proceedings of the First International Conference on Quality of Service in Heterogeneous Wired/Wireless Networks
Year:
2004

Citing 0
Cited 4

Voice over Internet Protocol over IEEE 802.11 Wireless Local Area Networks and effective admission control with transmission interval adaptation

International Journal of Autonomous and Adaptive Communications Systems
An autonomous distributed admission control scheme for IEEE 802.11 DCF

The Fourth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness & Workshops
A resource management strategy for interconnected WLAN and UMTS networks based on user mobility, call renegotiation, and call reallocation

ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
Improvement of capacity and energy saving of VoIP over IEEE 802.11 WLANs by a dynamic sleep strategy

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications

Quantified Score

Hi-index	0.00

Visualization

Abstract

In this paper, we proposed a novel call admission and rate control (CARC) scheme. Unlike previous research works that are focused on providing service differentiation in the contention-based 802.11 DCF, we aim to support stringent QoS requirements of real-time and streaming traffic. The key idea of this scheme is to regulate the arriving traffic of the WLAN such that the network can work at an optimal point. We first show that the channel busyness ratio is a good indicator of the network status in the sense that it is easy to obtain and can accurately and timely represent channel utilization. Then we propose two algorithms that function upon the use of the channel busyness ratio. The call admission control algorithm is used to regulate the admission of real-time or streaming traffic and the rate control algorithm to control the transmission rate of best effort traffic. A comprehensive simulation study in ns-2 has verified the performance of our proposed CARC scheme, showing that the original 802.11 DCF protocol can statically support strict QoS requirements, such as those required by voice over IP or streaming video, and at the same time, achieve a high channel utilization.