Delay analysis of self-organized TDMA VHF datalink
-
摘要: 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.Abstract: The method of slots reservation affect 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 in this paper. 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.
-
[1] Johnsson L. The cellular CNS concept (CCC) operating concept based on the VHF STDMA data link[J]. Navigation, 1996, 44(176):432~459 [2]Bretmersky S, Konangi V K, Kerczewski R J. Comparison of VDL modes in the aeronautical telecommunications network . Proceedings of IEEE Aerospace Conference . 2002, 3:1183~1190 [3]ICAO AMCP WG-D, Draft VDL mode 4 standards and recommended practices (Version 5.4) [S]. VDL SARPs WG-D/6, 1997 [4] 张 军,张其善,邓秋林. S-TDMA系统时隙预约选择算法分析[J]. 北京航空航天大学学报, 2001, 27(5):514~517 Zhang Jun, Zhang Qishan, Deng Qiulin. On the slot reservation selection algorithm about self-organized TDMA VHF data link[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(5):514~517(in Chinese) [5] Gustavsson N. VDL mode 4/STDMA-a CNS data link . Proceedings of the AIAA/IEEE 15th Digital Avionics Systems Conference . New York, USA, 1996. 111~116 [6] 张 军,李 宏,李忠孝,等. 一种新的自组织时分多址甚高频数据链隐藏终端分析方法[J].电子学报, 2001, 29(12):1615~1619 Zhang Jun, Li Hong, Li Zhongxiao, et al. A new analysis method on the hidden terminals in self-organized TDMA VHF datalink[J]. Acta Electronica Sinica, 2001, 29(12):1615~1619(in Chinese) -
点击查看大图
计量
- 文章访问数: 3035
- HTML全文浏览量: 188
- PDF下载量: 919
- 被引次数: 0
下载:
