[Smac-users] goodput about SMAC

[=?GB2312?B?zO/D9w==?=]

Hi to all, I am trying to trace the goodput(throughput) of two wireless
nodes communicating with each other using the SMAC protocol implemented in
ns2. The two nodes are within the transmission range of each other and
sending ping messages to each other. First i will simulate it in ns2, and
then get the information about the goodput using gawk.But i am not sure how
to calculate the goodput using awk, is any body has the awk file about this
?
 the following is my code, is there any error?

BEGIN {
    packet_byte=0;
    packet_losts =0;
}

$1 ~/r/ {
 #goodput
 if(match($4,"AGT") && match($7,"tcp") )
 {
       packet_byte = packet_byte + $8;
  }
 if(match($4,"AGT") && match($7,"ack") )
 {
        packet_byte = packet_byte + $8;
  }
}
$1 ~/D/ {
 if(match($4,"RTR") && match($5,"CBK") && match($7,"tcp"))
 {
       packet_losts = packet_losts + 1;
  }
}
END {
     goodput = (packet_byte*8.0)/1024/1024/50;   #Mbps
     printf "%d\t%d\t%d\t%f\n",nodes_num,packet_losts,nodes_num/2,goodput >>
outfile;
}
and the trace file are like this :

r 45.123933000 _0_ MAC  --- 0 CTS 38 [52ac 0 0 0]
s 45.123943000 _0_ MAC  --- 9 tcp 2612 [102 1 0 800] ------- [0:0 1:0 30 1]
[6 0] 0 0
r 45.144839500 _1_ MAC  --- 9 tcp 2560 [102 1 0 800] ------- [0:0 1:0 30 1]
[6 0] 1 0
s 45.144849500 _1_ MAC  --- 0 ACK 38 [0 0 0 0]
r 45.144864500 _1_ AGT  --- 9 tcp 2560 [102 1 0 800] ------- [0:0 1:0 30 1]
[6 0] 1 0
s 45.144864500 _1_ AGT  --- 13 ack 40 [0 0 0 0] ------- [1:0 0:0 32 0] [6 0]
0 0
r 45.145098000 _0_ MAC  --- 0 ACK 38 [0 0 0 0]




Thanks a lot

Ming,

Computer Science and Technology

JiLin University
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