Title
A novel QoE-aware multicast mechanism for video communications over IEEE 802.11 WLANs
Date Issued
09 August 2012
Access level
metadata only access
Resource Type
journal article
Author(s)
Santos M.A.
Villalón J.
UCLM
Abstract
During the past few years, the development of video services over wireless networks has been driven by Quality of Service (QoS) parameters and service level agreements. Even though QoS parameters, such as packet losses, jitter and delays are good indicators of the service provided by the underlying network services to the applications, they fall short on providing a better measure of the Quality of Experience (QoE) to the end-user. In order to gain a better understanding of the benefits in terms of the QoE guarantees, it is essential to evaluate the effectiveness of the enabling protocol mechanisms. In this paper, we introduce a novel multicast service for the IEEE 802.11 WLAN standard. The proposed service combines a novel MAC scheme and layered video, guaranteeing a minimum acceptable video quality to all the members of the multicast group through the base layer. To avoid penalizing the users capable of receiving data at higher rates and the performance of an IEEE 802.11 WLAN, the enhancement layers are transmitted using a higher transmission rate. We show that by properly coupling the video and multicast control mechanisms, the QoS as well as the QoE requirements of the end-user can be guaranteed. The performance of the proposed system architecture is extensively investigated by simulations and through numerical evaluation of relevant QoS and QoE metrics. Furthermore, our results show that the real-time video streaming quality of the total system can be greatly improved while keeping downward compatibility with the IEEE 802.11 multicast mechanism. © 1983-2012 IEEE.
Start page
1205
End page
1214
Volume
30
Issue
7
Language
English
OCDE Knowledge area
Ingeniería de sistemas y comunicaciones
Scopus EID
2-s2.0-84864543485
Source
IEEE Journal on Selected Areas in Communications
ISSN of the container
07338716
Sponsor(s)
Manuscript received 21 August 2011; revised 31 January 2012. This work was supported by the Spanish MICINN, Consolider Programme and Plan E funds, as well as European Commission FEDER funds, under Grants CSD2006-00046 and TIN2009-14475-C04-03. It was also partly supported by the Council of Science and Technology of Castilla-La Mancha under Grants PEII09-0037-2328 and PII2I09-0045-9916.
Sources of information: Directorio de Producción Científica Scopus