I'm trying to simulate satellite links using ns1.3.
Before 'TCP extension option' is included, I've just changed parameters
(delay, bandwidth).
Now, I hesitate simulation.
1. What is the value of 'window size' ?
Using TCP window scaling option, I can extend window size to 2^30 bytes.
But, window scaling option is included in TCP SYN segment.
So, TCP has no information about window scaling.
Can I use bandwidth*delay as window size?
2. What is the value of 'initial ssthresh' ?
Before TCP extension option is included, initial ssthresh equals to
'window size' from receiver.
Still can I use 'window size' as initial ssthresh?
3. As you know, most people assume that they don't use delayed ACK in their
reports.
If they assume like that, these reports can explain real TCP congestion
control in satellite links?
sample topology)
hosts gateway terminal
O-----------------------O----------------------O
10 Mbps, 10ms (satellite link)
up-downlink : 10 Mbps, 290 ms (RTT = 580 ms)
* MSS : 1000 bytes (or other).
* use window scaling option.
4. Above figure shows a sample topology.
What are the parameter values (i.e window size, initial ssthresh, etc)
in your simulation or experiment.
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