Wireless multimedia delivery over 802.11e with cross-layer optimization techniques

Authors:
Naveen Chilamkurti;Sherali Zeadally;Robin Soni;Giovanni Giambene
Affiliations:
Department of Computer Science and Computer Engineering, La Trobe University, Melbourne, Australia 3086;Department of Computer Science and Information Technology, University of the District of Columbia, Washington, DC, USA 20008;Department of Computer Science and Computer Engineering, La Trobe University, Melbourne, Australia 3086;Universit`a degli Studi di Siena, Siena, Italy 53100
Venue:
Multimedia Tools and Applications
Year:
2010

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Abstract

The use of wireless networks has spread further than simple data transfer to delay sensitive and loss tolerant multimedia applications. Over the past few years, wireless multimedia transmission across Wireless Local area Networks (WLANs) has gained a lot of attention because of the introduction of technologies such as Bluetooth, IEEE 802.11, 3G, and WiMAX. The IEEE 802.11 WLAN has become a dominating technology due to its low cost and ease of implementation. But, transmitting video over WLANs in real time remains a challenge because it imposes strong demands on video codec, the underlying network, and the Media Access Control (MAC) layer. This paper presents a cross-layer mapping algorithm to improve the quality of transmission of H.264 (a recently-developed video coding standard of the ITU-T Video Coding Experts Group) video stream over IEEE 802.11e-based wireless networks. The major goals of H.264 standard were on improving the rate distortion and the enhanced compression performance. Our proposed cross-layer design involves the mapping of H.264 video slices (packets) to appropriate access categories of IEEE 802.11e according to their information significance. We evaluate the performance of our proposed cross-layer design and the results obtained demonstrate its effectiveness in exploiting characteristics of the MAC and application layers to improve the video transmission quality.