2008/7/23 Omprakash Gnawali [EMAIL PROTECTED]:

> If you put sequence numbers in the packet, you can find out which
> packets were not received. For example, you sent sequence numbers 1
> through 10 but and received 1,2,3,4,6,7,8,9,10 then you know exactly
> how many packets were not received.
>
> - om_p
>

actually this isn't my scenario;
here is an example of my protocol mechanism:
we assume Node1 neighbor of nodes 2 & 3, and these two nodes are neighbors
of source S (S will send 10 msgs for example)
if 3 crashes so node 1 won't receive any more packets from 3. which means if
S sends messages (from numSeq = 5 to 9)  node A will never notice that he
missed the 5 last nodes (because he doesn't communicate with S directly ,
and node 3 is turned off for ever and node 2 won't help him to know what
node 3 lost as messages (from S or other sources) because seq number is
unique and different for each node (the 5th seqNum for node 2 may be the 1st
message of the source S)
now i wonna to calculate packet loss rate in my network since i have a set
of nodes who crash and will lose some sent messages.
am i clear now ? if yes, how to handle this situation.
thanks in advance.
best regards.
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