黄建伟AU - Ci，宋AU - Wang，郝红AU - Wu，黄建伟AU - Ci，宋AU - Wang，郝红AU - WuDalei PY - 2008 DA - 2008/04/29 TI - Quality-Aware跨层优化的无线多媒体通信的理论框架SP - 543674六世- 2008 AB——尽管跨层被认为是最有效的和有效的方法之一,为多媒体通信在无线网络和大量的研究已经完成area, there is still lacking of a rigorous mathematical model to gain in-depth understanding of cross-layer design tradeoffs, spanning from application layer to physical layer. As a result, many existing cross-layer designs enhance the performance of certain layers at the price of either introducing side effects to the overall system performance or violating the syntax and semantics of the layered network architecture. Therefore, lacking of a rigorous theoretical study makes existing cross-layer designs rely on heuristic approaches which are unable to guarantee sound results efficiently and consistently. In this paper, we attempt to fill this gap and develop a new methodological foundation for cross-layer design in wireless multimedia communications. We first introduce a delay-distortion-driven cross-layer optimization framework which can be solved as a large-scale dynamic programming problem. Then, we present new approximate dynamic programming based on significance measure and sensitivity analysis for high-dimensional nonlinear cross-layer optimization in support of real-time multimedia applications. The major contribution of this paper is to present the first rigorous theoretical modeling for integrated cross-layer control and optimization in wireless multimedia communications, providing design insights into multimedia communications over current wireless networks and throwing light on design optimization of the next-generation wireless multimedia systems and networks. SN - 1687-5680 UR - https://doi.org/10.1155/2008/543674 DO - 10.1155/2008/543674 JF - Advances in Multimedia PB - Hindawi Publishing Corporation KW - ER -