Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
A cross-layer approach to channel assignment in wireless ad hoc networks
Mobile Networks and Applications
Cross-layer design for medium access control in CDMA ad hoc networks
EURASIP Journal on Applied Signal Processing
Comparison of Multichannel MAC Protocols
IEEE Transactions on Mobile Computing
Content-aware error-resilient transcoding using prioritized intra-refresh for video streaming
Journal of Visual Communication and Image Representation
H.264/AVC video for wireless transmission
IEEE Wireless Communications
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Optimized Cross-Layer Design for Scalable Video Transmission Over the IEEE 802.11e Networks
IEEE Transactions on Circuits and Systems for Video Technology
Journal of Systems and Software
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This paper presents a cross-layer design for a reliable video transmission over wireless ad hoc networks based on multichannel MAC protocol with TDMA. First, we conduct a study of the multichannel MAC protocol through Markov chain model. Based on this study, two novel cross-layer modules are adopted for the design of multichannel MAC protocol. First, we adopt maximum latency rate (MLR) as the channel quality metric. Unlike the traditional MAC design based on network allocation vector (NAV), MLR is implemented to provide differentiated traffic so that the channel with smaller MLR time is initiated for higher priority traffic. Second, we adopt two congestion-aware metrics, namely MAC utilization and queue length of MAC layer, to improve the congestion-aware routing protocols with AODV and DSR. These two novel modules allow the proposed MAC protocol design to achieve high performance video transmission over wireless ad hoc networks. Experimental results show that the proposed scheme outperforms the state-of-the-art schemes under multichannel environments in wireless ad hoc networks for as much as 3.6 dB in PSNR. Such significant performance enhancement confirms that the cross-layer approllch is very effective for multichannel MAC protocol design.