A cross-layer design for efficient video transmission over wireless networks: Statistical QoS optimisation

Studies on the cross-layer design for efficient multimedia delivery with QoS assurance over wireless networks utilize the differentiated service architecture to convey multimedia data. The common approach is the partitioning of multimedia data into smaller units, and then maps these units to different classes for prioritized transmission. The partitioned video units are prioritized based on its contribution to the expected quality at the end user, while the priority transmission system provides different QoS guarantees depending on its corresponding service priority. In order to maintain quality of video and uninterrupted service in highly dynamic wireless environment, it is necessary to utilize statistical QoS in cross-layer design and interaction between layers. An in-depth analysis and comparative evolution of optimally strategies for mapping video layers to one of the priority classes, are presented in this paper.