ORBIT-USER: Doubts regarding anaylsis and meaurement script

[semhatre at cc.gatech.edu]

Hi.

I have some doubts regarding teh analysis of results in OML.
In the helloworld experiment the results are stored in 3 tables
sender_otg_senderport
receiver_otr_receiverport
receiver_otr_flow

1.I used the mac filtering commands on the wiki

http://www.orbit-lab.org/wiki/HowTo/virtualMobility

on one of the nodes of sandbox. I reduced the RSSI value in teh iwpriv
command as

node1-2:~# iwpriv ath1 orbitfilter 0x00 0x60 0xb3 0x25 0xc0 0x27 75 55

But yet the receiver_otr_receiverport database showed all rssi values as 0.
The rssi values remain 0 even when I just run the simple helloworld script
without using the command above.CAn I know why RSSI is always 0?

2.Also another data measurement script on this page
http://www.orbit-lab.org/wiki/Documentation/OTG/Measurement/DatabaseProcess
is aimed at showing the packet loss count by analysing the sender and
receiver side tables.

But even when the receiver table contains entries for packets with all
fields 0 (that is packet was lost) teh script always gives equal number of
packets from sender and received in reciever in the "tempres" file.
This is because the script just takes a row count of the two tables not
considering the field entries.

for eg-
sender_otg_senderport table has following entries
node_id sequence_no timestamp pkt_seqno pkt_size_sample_sum gen_timestamp
tx_timestamp
node1-1 1 1163993992 1 36864 27.3067 13191741
node1-1 2 1163993993 37 36864 1010.35 13192724
node1-1 3 1163993994 73 37888 1993.39 13193708
node1-1 4 1163993995 110 37888 3003.73 13194718
node1-1 5 1163993996 147 36864 4014.08 13195729
node1-1 6 1163993997 183 37888 4997.12 13196711
node1-1 7 1163993998 220 37888 6007.47 13197721
node1-1 8 1163993999 257 36864 7017.81 13198732
node1-1 9 1163994000 293 37888 8000.85 13199715
node1-1 10 1163994001 330 37888 9011.2 13200726


while receiver_otr_receiverport table has following entries
node_id sequence_no timestamp pkt_seqno flow_no rcvd_pkt_size_sample_sum
rx_timestamp rssi xmitrate
node1-2 1 1163993992 0 0 0 0 0 0
node1-2 3 1163993993 38 0 16384 13192753 0 0
node1-2 4 1163993994 69 0 13312 13193599 0 0
node1-2 5 1163993995 0 0 0 0 0 0
node1-2 6 1163993996 0 0 0 0 0 0
node1-2 7 1163993997 0 0 0 0 0 0
node1-2 8 1163993998 0 0 0 0 0 0
node1-2 9 1163993999 0 0 0 0 0 0
node1-2 10 1163994000 0 0 0 0 0 0

yet the tempres file shows 10 10 as the result which measn no packets
lost. Can anybody throw light on this?

Regards,
Swapnil