计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (34): 101-102.

• 网络、通信、安全 • 上一篇    下一篇

P坚持时隙ALOHA稳定性

方 飞1,2,毛玉明1,冷甦鹏1,毛建兵1   

  1. 1.电子科技大学 通信与信息工程学院,成都 610054
    2.内江师范学院 物理与电子信息工程学院,四川 内江 641112
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-12-01 发布日期:2011-12-01

Stability of p-persistent slotted ALOHA

FANG Fei1,2,MAO Yuming1,LENG Supeng1,MAO Jianbing1   

  1. 1.School of Communication and Info. Engin. University of Electronic Science and Technology of China,Chengdu 610054,China
    2.School of Physics & Electronic Information Engineering,Neijiang Normal University,Neijiang,Sichuan 641112,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-12-01 Published:2011-12-01

摘要: 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。

关键词: 动态共享无线通信系统, 时隙ALOHA, p坚持, 稳定性

Abstract: 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.

Key words: dynamic spectrum sharing communication system, slot ALOHA, p-persistent, stability