Calculating bit error probability

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atticus87

Joined: 03 Nov 2009
Posts: 1
Location: Germany

03 Nov 2009 12:23 Calculating bit error probability

Hi all,

I would like to calculate the bit error probability and packet error probability in a network. The network characteristics are : the network uses handshaking protocols, so after sending a packet the sender has to wait for an acknowledgement packet. Only then can it send another packet. The transfer time of the acknowledgement packet is negligible and it is assumed that the sender transmits the acknowledgement immediately after receiving the packet.
Propagation delay is 5 microsec transmission delay is 10 Mb/sec.

I know I need the distribution function of the random variable which describes the number of errors in a packet.
Could you please help me ? I have not found any method on how to calculate those probabilities !

Thanks,
atticus

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moustafa.abdelhady

Joined: 07 Nov 2009
Posts: 16
Helped: 1
Location: Egypt

09 Nov 2009 23:38 Re: Calculating bit error probability

You can try to count a number of packets, for example 1000 packets, and also count the number of re-transmissions within those 1000 packets and simply divide the number of the re-transmissions by 1000 to get the packet error rate.
You can also count the packets with CRC failed and divide the number of these packets by 1000.