中文摘要：

随着通信技术的发展，各种多媒体应用被引入到无线和卫星网络，然而由于无线及卫星网络的信道特性并不理想，传统的分层设计方法对于无线环境来说有相当大的局限性，因此近年来另外一个设计方法——跨层设计成为了一个研究热点．本文首先简单介绍了跨层设计方法的背景、思路，之后论述了该方法在卫星通信网络中的应用，最后分析讨论了跨层设计的特点、代价和折衷．

英文摘要：

Abstract： With the development of communication technologies, various multi-media applications have been introduced into wireless and satellite networks. However, as wireless channels and satellite channels are not ideal and the traditional layering design method has its deficiencies, another network design method cross-layer design has attracted more attention in recent years. In this article, the origin and methodology of cross-layer design are fast presented. Then present efforts on cross-layer design for satellite networks are reviewed. Last the costs and tradeoffs in crosslayer design are analyzed.