P坚持时隙ALOHA稳定性

摘要

The slotted ALOHA protocol is used to obtain the channel of data in dynamic spectrum sharing communication system, but the problem of stability is the inherent characteristics for slotted ALOHA.A model about p-persistent slotted ALOHA has been designed.This paper analyzes the stability of slotted ALOHA system in case of determinate retransmission probability and the variable probability of new packed generation, furthermore the stability of slotted ALOHA system is analyzed in the case of variable retransmission probability and the determinate probability of new packed generation.The condition of system stability is proposed via numerical calculation and simulation.%动态频谱共享无线通信系统使用时隙ALOHA协议完成对数据信道的竞争,稳定性问题是时隙ALOHA协议的固有特性.通过建立P坚持时隙ALOHA的系统模型,分析了在重传概率确定情况下,新包的生成率对系统稳定性的影响,以及新包的生成率已知情况时,重传概率对系统稳定的影响；通过数值计算与仿真,给出了两种情况下系统稳定的条件.