Document Type
Conference Proceeding
Publisher
IEEE
Faculty
Computing, Health and Science
School
School of Engineering, Centre for Communications Engineering Research
RAS ID
5095
Abstract
Wireless local area networks (WLANs) have become very popular both in private and public sectors. Despite the fast expansion of WLANs in various environments, quality of service (QoS) issues for multimedia applications in WLANs are not yet resolved. Multimedia applications contain traffic that are sensitive to delay and jitter and therefore a best-effort protocol such as the legacy IEEE 802.11 is not suitable. The 802.11e protocol provides prioritization and classification of traffic to offer better QoS for real-time services. However, it leaves the design and implementation of many important optimization features to vendors. In this paper we introduce a mechanism to improve the delay and jitter of real-time traffic in WLAN nodes supporting multimedia applications. In our proposed mechanism, we segregate voice and video traffic from the best-effort traffic. We create a scheduler that schedules the access of real-time traffic and non real-time traffic to the medium with centralized polling and distributed contention respectively. We show that our proposed protocol performs better in terms of delay and jitter than the legacy 802.11 and 802.11e in a scenario where all wireless nodes carry multimedia traffic simultaneously.
Comments
This conference paper was originally published as: Zen, H., Habibi, D., Rassau, A. M., & Wyatt, J. (2007). Adaptive Segregation-Based MAC Protocol for Real-Time Multimedia Traffic in WLANs. Proceedings of IEEE International Conference On Networking . (pp.461-466). Adelaide. IEEE. Original article available here