Joint Adoption of QoS Schemes for MPEG Streams
Multimedia Tools and Applications
IEEE Transactions on Multimedia
Wireless multimedia delivery over 802.11e with cross-layer optimization techniques
Multimedia Tools and Applications
Intelligent QoS management for multimedia services support in wireless mobile ad hoc networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
A distortion-minimizing rate controller for wireless multimedia sensor networks
Computer Communications
A dynamical games approach to transmission-rate adaptation in multimedia WLAN
IEEE Transactions on Signal Processing
Channel, deadline, and distortion (CD2) aware scheduling for video streams over wireless
IEEE Transactions on Wireless Communications
IEEE Communications Magazine
Optimized Cross-Layer Design for Scalable Video Transmission Over the IEEE 802.11e Networks
IEEE Transactions on Circuits and Systems for Video Technology
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To support and keep high quality of video transmission over wireless sensor networks, this paper proposes a parameter adaptive bi-directional cross-layer mapping algorithm on the basis of the operation mechanism of IEEE 802.11e Enhanced Distributed Coordination Function (EDCF) supporting video service differentiation, named PABM-EDCF. Instead of classifying video data to a specific access category in 802.11e network, our proposed adaptive cross-layer scheme makes use of the hierarchy characteristic of video stream, dynamically maps video data to the appropriate access categories according to both the significance of the different video frames and the network traffic load. The significance passes from the application layer to the media access layer through a cross-layer architecture. In order to prevent the network congestion and keep the high transmission quality, the proposed algorithm adopts bi-directional floating mapping algorithm and congestion awareness mechanism based on the queue length and frame types. The mapping parameters are updated according to the network condition in time. Our simulation results indicate: the proposed method (a) improves the video transmission quality; (b) optimizes the management and utilization of queue resources; and (c) yields superior performance (under different loads) over 802.11e, static mapping and adaptive mapping schemes.