Figure 12.5 Vulnerable time for pure ALOHA protocol 纯ALOHA可能的冲突时间是帧长度的两倍 B's end A's end collides with collides with A's beginning C's beginning 感 B 器 A 器 盈 器 t-Tfr t+Tir Time Vulnerable time =2 x Tfr 12.912.9 Figure 12.5 Vulnerable time for pure ALOHA protocol 纯ALOHA可能的冲突时间是帧长度的两倍