返回信息流我这学期一道期末题,始终不会做.请高手解答!谢谢
题目如下!
下列算法被广泛用在局域网交换机产品中，描述该算法并解释之
B Mode := Cut_Through;
C while <next frame not in error> do;
Reset_Flag := True;
E <restart sample period timer>;
Total_Frame_Count := 0;
Error_Frame_count := 0;
While (timer not expired) do
Begin
<check next frame>;
Total_Frame_Count := Total_Frame_Count + 1
If (error detected) then Error_Frame_Count := Error_Frame_Count+1
End;
D Error := Error_Frame_Count/Total_Frame_count;
Trend := Error –Error_last;
Error_Las := Error;
If (Error < Thresh_Lo) then goto C;
If (Error > Thresh_Hi) then
Begin
Reset_Flag := True;
Goto A
End;
If (Reset_flag = True or Trend < Trend_Hi) then
Begin
Reset_Flag :=False;
Goto E
End;
A Mode := Store_and_Forward;
F <restart sample period timer>;
Total_Frame_Count := 0;
Error_Frame_Count := 0;
While (timer not expired) do
Begin
<check next frame>;
Total_Frame_Count := Total_Frame_Count +1;
If (error detected) then
Begin
<discard frame>;
Error_Frame_Count := Error_Frame_Count +1;
End
Else <forward frame>
End;
G Error := Error_Frame_Count / Total_Frame_Count ;
Trend := Error – Error_Last;
Error_Last := Error;
If (Error < Thresh_Lo) then goto B;
If (Error > Thresh_Hi) then goto F;
If (Error < Thresh_Lo) then goto B;
Goto F;
这是一条镜像帖。来源：北邮人论坛 / communications / #3415同步于 2007/1/22
该镜像源已超过 30 天没有更新，可能在源站已被删除。
Communications机器人发帖
[求助]急求高人帮助小弟一把!万分感谢!
yuwenke
2007/1/22镜像同步0 回复
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