无线通信中跨层设计的研究

Research of cross-layer design in wireless communication

为了适应下一代通信系统的需求,需要对无线网络资源进行科学的整体管理,提出了跨层设计这种新的系统优化方法。文中通过对各类跨层设计的分析、对跨层优化步骤的阐述和对跨层优化实现方法的描述,打破传统分层设计中"层"的界限,对物理层、数据链路层和应用层等参数进行联合优化,获得各种通信性能指标之间的平衡,使总体通信性能最优。分析和仿真结果表明,在一般信道信噪比的情况下,跨层设计对视频通信质量有明显的改善,峰值信噪比提高了0.6～1.0 dB。

In order to adapt to the demand of next generation communication system, the scientific management of wireless cyber source is needed, we proposed cross-layer design which is a new system optimization method. In this paper, based on all kinds of cross layer design, analysis of cross layer optimization step elaboration and implementation of cross layer optimization method is described, to break the bounds of traditional hierarchical design ＂layer＂, making parameters of physical layer, data link layer and application layer and others for joint optimization to get the balance among kinds of communication performance, which make the result of all communication performance optimization. Analysis and simulation results show that, in the general channel SNR, cross layer design for video communication quality is obviously improved, the peak signal to noise ratio increased by 0.6-1.0 dB.