ORBIT-USER: Questions about analyzing results and OML
Yang Chen
yangchen at cc.gatech.edu
Mon Nov 20 18:52:52 EST 2006
hi, all:
>From the introduction of OML, there would be two tables at the
sender/receiver side respectively.
On the sender side, there would be a time-triggered measurement on the
summation of the pkt size sent;
On the receiver side, there would be time-triggered measurement on the
summation of the pkt size received;
I have the following questions:
1) How to compute the throughput at each side?
>From sender.rb and receiver.rb, the measurement interval seems to be 1
seocnd. But the value of pkt_size_sample_sum
and rcvd_pkt_size_sample_sum are in terms of what? Byte? Bit? Does it
include headers' size or it is just the payload?
2) How to compute the average delay?
In senderport table, there are three columns, two of them are integers and
one of them is float.
| timestamp | gen_timestamp | tx_timestamp |
How to interpret each of them?
On each side's table, there is a column called pkt_seqno, but none of the
records has the same pkt_seqno. So how can I know which
packet I should track for its sending time and receiving time?
3) In my helloworld experiment, both rssi and xmitrate in the receiver table
are always 0 while a certain amount of pkts are received. Is this correct?
Any comments and suggestions are appreciated.
rgds,
Yang
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