摘要
STDMA是AIS(船舶自动识别系统)中的关键技术,它采用时隙动态预约的自组织方式工作.由于候选时隙的重叠,系统可能发生时隙的冲突.针对这一问题,利用概率分析理论,推导出在两船及多船的情况下,系统时隙冲突概率的数学模型,给出了仿真的曲线并进行了分析.结果表明STDMA时隙动态预约算法采用周期时隙预约和增量时隙预约相结合的方式,减少了时隙发生冲突的可能.最后,提出了对这一算法进行改进的思路.
The dynamic slot reservation selection method is adopted in STDMA, which is the key technique in AIS. Because of the overlapping of candidate slots, the reserved slots will collide. The mathematical models of slot collision are presented for two and more ships based on the theory of probability and it is concluded from the simulation curves that the STDMA algorithm decreases the probability of slot collision by combining the periodic slot reservation and the increment slot reservation, and some ideas are proposed for improving the slot selection algorithm.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2002年第5期52-56,共5页
Journal of Harbin Engineering University
