中文摘要：

该文首次将跨层设计思想引入IEEE802.22标准草案里关于感知时隙调度方案的设计中。为达到提高系统整体性能的目的,采用跨层设计思想,对目前IEEE802.22草案中关于TSS（Two-Stage Sengsing）方案中的参数作了进一步研究和定义。从两方面提出一种新的关于MAC层感知时隙调度的方案。一方面,基于物理层的无线衰落信道二阶统计特性定义了快速感知时隙的调度频率;另一方面,以最大化非授权用户传输吞吐量为目标,得到细微感知的最佳持续时间。结果证明该文提出的方案使MAC层的TSS方案更加明确、有效并能适应不同传输环境变化的目的。

英文摘要：

In this paper,one sensing-slots scheduling scheme is proposed by using cross-layer design based on IEEE802.22 draft standard.In order to improve the whole system performance,the parameters of TSS scheme in current IEEE802.22 draft are further studied and modified by using cross-layer design.A new sensing-slots scheduling scheme on the MAC layer is proposed from two aspects.First,on the basis of the second-order statistic properties of wireless fading channels on the physical layer,the scheduling frequency of fast sensing timeslot is defined.Then,in order to maximize the transmission throughput for sencondary users,the duration of fine sensing stage is optimized.It is proven that the scheme proposed in this paper makes the TSS scheme more explicit,effective and be able to adapt to varying transmission environments.