自组织时分多址甚高频数据链的延时分析

Delay analysis of self-organized TDMA VHF datalink

时隙预约方法对自组织时分多址系统的延时性能有很大影响 .针对动态时隙分配方案中典型的回溯搜索算法 ,分析了时隙空闲概率及预约冲突概率对报文延时的影响 ,并采用概率周期分析方法 ,通过引入时隙处于空闲和忙状态的概率 ,详细分析了报文延时与用户数和发报率的关系 .最后 ,提出了一种新的时隙选择算法———序贯搜索算法 .仿真结果表明 ,该算法的延时性能比回溯搜索算法优越 .

The method of slots reservation affects on the time delay performance of self-organized time division multiple access (S-TDMA) system heavily. In allusion to the backdate search arithmetic typically used in the dynamic slot assignment scheme, the influence exerted on message delay by slot idle probability and reservation collision probability is analyzed. A detailed analysis of the relationship between the message delay and the number of users is also presented, as well as the relationship between the message delay and the speed of data. In the end, an alternative arithmetic namely sequential search arithmetic is proposed. The simulation results indicate that the delay performance of this arithmetic is superior to backdate search arithmetic.