Sorry last message I sent, is incomplete, it was a mistake!! Hi,
I want to make a simple script to measure those parameters, and i'm changing the example datarate.tcl that came with the Nist package. My problem is, i'm using the c++ functions that are in http://140.116.72.80/~smallko/ns2/tool_en.htm . That functions give me 2 files, and one of them has this data about the packets received by the sink node: packet id ; packet send time; packet receiving time; end-to-end delay. -My method was, to measure the end-to-end delay, i just made one AWK script to calculate the average of all delays (delay_of_packet[i]=packet[i]_send_time-packet[i]_receiving_time). - To measure the Jitter is given by the formula jitter ＝((recvtime(j)-sendtime(j))-(recvtime(i)-sendtime(i)))/(j-i) Can i use this formula? It's easy because i've all that times. But How to calculate the average? Some Jitter times are negative, i'm using this expression: Jitter_average= sum(absolute_value(Jitter[i]))/(number_of_packets_received-1) Should I kept the absolute value to avoid the negative instantaneous Jitters or not? OR Some of you already tried that functions made by Chih-Heng, Ke, and you think that the functions are no good idea to take that parameters? Instead of that should i use Mac/802_16 set print_stats_ true? But i haven't found information about how to interpret that results. Thanks! Tiago Junqueira
