July 17, 2005

[INFO] Tips cara menghitung troughput wireless / FO /LC :

Lakukan ping 100 kali ke arah IP router lawan dengan menaikan beban data (60 - 100000 bytes ) hingga tercapai :

Time /latency antara 50 - 100 ms
Packet loss antara 2 - 5 %

Latency dibawah 50 berarti bytes yang dikirim masih dibawah trougput .
Latency diatas 100 berarti bytes yang dikirim sudah diatas trougput .
Demikian juga berlaku untuk packet loss.

Rumusnya : Total Bytes yang terkirim / sec = xxx bit/sec
Contoh :
C:\Documents and Settings>ping -l 5000 202.43.166.18 -t

Pinging 202.43.166.18 with 5000 bytes of data:
Reply from 202.43.166.18: bytes=5000 time=80ms TTL=254
Reply from 202.43.166.18: bytes=5000 time=90ms TTL=254
Request timed out.
Reply from 202.43.166.18: bytes=5000 time=46ms TTL=254
Reply from 202.43.166.18: bytes=5000 time=46ms TTL=254

Ping statistics for 202.43.166.18:
Packets: Sent = 22, Received = 21, Lost = 1 (4% loss),
Approximate round trip times in milli-seconds:
Minimum = 36ms, Maximum = 101ms, Average = 59ms

Total bytes data = 5000 bytes x 21 x 8 ( dikonversi ke bit )
Waktu = 59 ms = 59 / 1000 sec
Trougput = ( 5000 x 21 x 8 x 1000 ) / 59 = 14237288 bit/sec = 14.2 Mbit/sec

Mudah-mudahan bisa berguna untuk semua, perhitungan ini mengacu pada s/wnettools ( troughtput test ) wacthup gold 6

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