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Re: [Discuss-gnuradio] [Douglas Geiger BBN 802.11b] Porting code on USR

From: Miklos Christine
Subject: Re: [Discuss-gnuradio] [Douglas Geiger BBN 802.11b] Porting code on USRP2 problems
Date: Fri, 8 May 2009 15:07:15 -0700
Hello Ben,

When I try to run the version of simple_mac that you posted, I get an error.
It seems like an infinite loop that prints to stdout:

2nstreams:  

It happens at the call to fg.rxpath.start() .

Do you have the same problem?

Thanks,
Miklos Christine

On Wed, May 6, 2009 at 10:46 AM, Ben Yahmed <address@hidden> wrote:
Hi all,
I modified the gain in the bbn_80211_rx.py file from 46 to 27 and the loss ratio has fallen down to 15-20%. Do you have any idea about the best value to put?
this is the ping capture:


# ping 10.0.0.1        PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=51.9 ms
64 bytes from 10.0.0.1: icmp_seq=2 ttl=64 time=52.0 ms
64 bytes from 10.0.0.1: icmp_seq=3 ttl=64 time=52.0 ms
64 bytes from 10.0.0.1: icmp_seq=4 ttl=64 time=49.2 ms
64 bytes from 10.0.0.1: icmp_seq=5 ttl=64 time=49.4 ms
64 bytes from 10.0.0.1: icmp_seq=6 ttl=64 time=46.3 ms
64 bytes from 10.0.0.1: icmp_seq=7 ttl=64 time=45.7 ms
64 bytes from 10.0.0.1: icmp_seq=10 ttl=64 time=35.2 ms
64 bytes from 10.0.0.1: icmp_seq=12 ttl=64 time=35.1 ms
64 bytes from 10.0.0.1: icmp_seq=13 ttl=64 time=34.3 ms
64 bytes from 10.0.0.1: icmp_seq=15 ttl=64 time=32.5 ms
64 bytes from 10.0.0.1: icmp_seq=16 ttl=64 time=33.0 ms
64 bytes from 10.0.0.1: icmp_seq=17 ttl=64 time=29.7 ms
64 bytes from 10.0.0.1: icmp_seq=18 ttl=64 time=29.8 ms
64 bytes from 10.0.0.1: icmp_seq=19 ttl=64 time=28.7 ms
64 bytes from 10.0.0.1: icmp_seq=20 ttl=64 time=28.1 ms
64 bytes from 10.0.0.1: icmp_seq=21 ttl=64 time=27.2 ms
64 bytes from 10.0.0.1: icmp_seq=22 ttl=64 time=25.8 ms
64 bytes from 10.0.0.1: icmp_seq=23 ttl=64 time=24.2 ms
64 bytes from 10.0.0.1: icmp_seq=24 ttl=64 time=23.6 ms
64 bytes from 10.0.0.1: icmp_seq=25 ttl=64 time=22.4 ms
64 bytes from 10.0.0.1: icmp_seq=26 ttl=64 time=20.4 ms
64 bytes from 10.0.0.1: icmp_seq=27 ttl=64 time=21.5 ms
64 bytes from 10.0.0.1: icmp_seq=28 ttl=64 time=11.1 ms
64 bytes from 10.0.0.1: icmp_seq=29 ttl=64 time=10.9 ms
64 bytes from 10.0.0.1: icmp_seq=30 ttl=64 time=10.2 ms
64 bytes from 10.0.0.1: icmp_seq=31 ttl=64 time=11.3 ms
64 bytes from 10.0.0.1: icmp_seq=32 ttl=64 time=11.2 ms
64 bytes from 10.0.0.1: icmp_seq=33 ttl=64 time=10.7 ms
64 bytes from 10.0.0.1: icmp_seq=34 ttl=64 time=11.2 ms
64 bytes from 10.0.0.1: icmp_seq=36 ttl=64 time=9.74 ms
64 bytes from 10.0.0.1: icmp_seq=38 ttl=64 time=11.2 ms
64 bytes from 10.0.0.1: icmp_seq=39 ttl=64 time=10.7 ms
64 bytes from 10.0.0.1: icmp_seq=40 ttl=64 time=11.2 ms
64 bytes from 10.0.0.1: icmp_seq=41 ttl=64 time=10.8 ms
64 bytes from 10.0.0.1: icmp_seq=44 ttl=64 time=9.83 ms
64 bytes from 10.0.0.1: icmp_seq=45 ttl=64 time=10.4 ms
64 bytes from 10.0.0.1: icmp_seq=47 ttl=64 time=9.91 ms
64 bytes from 10.0.0.1: icmp_seq=48 ttl=64 time=10.1 ms
64 bytes from 10.0.0.1: icmp_seq=49 ttl=64 time=11.1 ms
64 bytes from 10.0.0.1: icmp_seq=50 ttl=64 time=10.4 ms
64 bytes from 10.0.0.1: icmp_seq=51 ttl=64 time=10.4 ms
64 bytes from 10.0.0.1: icmp_seq=52 ttl=64 time=10.7 ms
64 bytes from 10.0.0.1: icmp_seq=53 ttl=64 time=10.0 ms
64 bytes from 10.0.0.1: icmp_seq=54 ttl=64 time=16.3 ms
64 bytes from 10.0.0.1: icmp_seq=55 ttl=64 time=10.1 ms
64 bytes from 10.0.0.1: icmp_seq=56 ttl=64 time=10.6 ms
64 bytes from 10.0.0.1: icmp_seq=58 ttl=64 time=9.69 ms
64 bytes from 10.0.0.1: icmp_seq=60 ttl=64 time=10.2 ms
64 bytes from 10.0.0.1: icmp_seq=62 ttl=64 time=9.91 ms
64 bytes from 10.0.0.1: icmp_seq=63 ttl=64 time=10.3 ms
64 bytes from 10.0.0.1: icmp_seq=65 ttl=64 time=11.0 ms
64 bytes from 10.0.0.1: icmp_seq=67 ttl=64 time=10.1 ms
64 bytes from 10.0.0.1: icmp_seq=68 ttl=64 time=11.0 ms
64 bytes from 10.0.0.1: icmp_seq=69 ttl=64 time=15.5 ms

^C
--- 10.0.0.1 ping statistics ---
69 packets transmitted, 55 received, 20% packet loss, time 68792ms
rtt min/avg/max/mdev = 9.695/20.881/52.076/13.669 ms


Ben Yahmed wrote:
Hi all,

I succeeded to make the simple_mac.py working. now it's pinging correctly but with a huge loss ratio. At first I disabled the carrier sense functions but after I reactivated them but I'm not sure these functions are working. I attached the 80211_mac folder so any suggestion or amelioration is welcome. I used this command line to run the python file: ./simple_mac.py -S 8 -v

I also hard_coded my mac adress so you need to change it before use.


you can see here the results that I have obtained by ping:

address@hidden ~]# ping 10.0.0.1
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
>From 10.0.0.2 icmp_seq=2 Destination Host Unreachable
>From 10.0.0.2 icmp_seq=3 Destination Host Unreachable
>From 10.0.0.2 icmp_seq=4 Destination Host Unreachable
>From 10.0.0.2 icmp_seq=5 Destination Host Unreachable
>From 10.0.0.2 icmp_seq=6 Destination Host Unreachable
>From 10.0.0.2 icmp_seq=7 Destination Host Unreachable
64 bytes from 10.0.0.1: icmp_seq=17 ttl=64 time=7.66 ms
64 bytes from 10.0.0.1: icmp_seq=24 ttl=64 time=15.3 ms
64 bytes from 10.0.0.1: icmp_seq=29 ttl=64 time=7.57 ms
64 bytes from 10.0.0.1: icmp_seq=33 ttl=64 time=8.12 ms
64 bytes from 10.0.0.1: icmp_seq=42 ttl=64 time=7.63 ms
64 bytes from 10.0.0.1: icmp_seq=49 ttl=64 time=8.13 ms
64 bytes from 10.0.0.1: icmp_seq=55 ttl=64 time=7.67 ms
64 bytes from 10.0.0.1: icmp_seq=56 ttl=64 time=7.74 ms
64 bytes from 10.0.0.1: icmp_seq=57 ttl=64 time=7.61 ms
64 bytes from 10.0.0.1: icmp_seq=69 ttl=64 time=8.10 ms
64 bytes from 10.0.0.1: icmp_seq=70 ttl=64 time=8.11 ms
64 bytes from 10.0.0.1: icmp_seq=76 ttl=64 time=8.06 ms
64 bytes from 10.0.0.1: icmp_seq=77 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=80 ttl=64 time=7.56 ms
64 bytes from 10.0.0.1: icmp_seq=87 ttl=64 time=7.55 ms
64 bytes from 10.0.0.1: icmp_seq=90 ttl=64 time=7.50 ms
64 bytes from 10.0.0.1: icmp_seq=96 ttl=64 time=7.64 ms
64 bytes from 10.0.0.1: icmp_seq=97 ttl=64 time=7.99 ms
64 bytes from 10.0.0.1: icmp_seq=100 ttl=64 time=8.20 ms
64 bytes from 10.0.0.1: icmp_seq=101 ttl=64 time=8.13 ms
64 bytes from 10.0.0.1: icmp_seq=102 ttl=64 time=7.96 ms
64 bytes from 10.0.0.1: icmp_seq=104 ttl=64 time=8.03 ms
64 bytes from 10.0.0.1: icmp_seq=111 ttl=64 time=7.63 ms
64 bytes from 10.0.0.1: icmp_seq=124 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=126 ttl=64 time=7.61 ms
64 bytes from 10.0.0.1: icmp_seq=130 ttl=64 time=7.69 ms
64 bytes from 10.0.0.1: icmp_seq=131 ttl=64 time=7.67 ms
64 bytes from 10.0.0.1: icmp_seq=132 ttl=64 time=7.61 ms
64 bytes from 10.0.0.1: icmp_seq=139 ttl=64 time=7.87 ms
64 bytes from 10.0.0.1: icmp_seq=140 ttl=64 time=7.86 ms
64 bytes from 10.0.0.1: icmp_seq=142 ttl=64 time=7.59 ms
64 bytes from 10.0.0.1: icmp_seq=146 ttl=64 time=8.17 ms
64 bytes from 10.0.0.1: icmp_seq=150 ttl=64 time=7.85 ms
64 bytes from 10.0.0.1: icmp_seq=151 ttl=64 time=7.68 ms
64 bytes from 10.0.0.1: icmp_seq=157 ttl=64 time=7.95 ms
64 bytes from 10.0.0.1: icmp_seq=161 ttl=64 time=7.76 ms
64 bytes from 10.0.0.1: icmp_seq=169 ttl=64 time=8.22 ms
64 bytes from 10.0.0.1: icmp_seq=171 ttl=64 time=8.07 ms
64 bytes from 10.0.0.1: icmp_seq=176 ttl=64 time=8.13 ms
64 bytes from 10.0.0.1: icmp_seq=180 ttl=64 time=8.19 ms
64 bytes from 10.0.0.1: icmp_seq=181 ttl=64 time=7.73 ms
64 bytes from 10.0.0.1: icmp_seq=182 ttl=64 time=8.04 ms
64 bytes from 10.0.0.1: icmp_seq=183 ttl=64 time=8.09 ms
64 bytes from 10.0.0.1: icmp_seq=187 ttl=64 time=8.18 ms
64 bytes from 10.0.0.1: icmp_seq=190 ttl=64 time=7.94 ms
64 bytes from 10.0.0.1: icmp_seq=210 ttl=64 time=8.03 ms
64 bytes from 10.0.0.1: icmp_seq=211 ttl=64 time=7.84 ms
64 bytes from 10.0.0.1: icmp_seq=213 ttl=64 time=7.61 ms
64 bytes from 10.0.0.1: icmp_seq=216 ttl=64 time=7.86 ms
64 bytes from 10.0.0.1: icmp_seq=221 ttl=64 time=7.96 ms
64 bytes from 10.0.0.1: icmp_seq=224 ttl=64 time=7.82 ms
64 bytes from 10.0.0.1: icmp_seq=225 ttl=64 time=7.74 ms
64 bytes from 10.0.0.1: icmp_seq=229 ttl=64 time=7.78 ms
64 bytes from 10.0.0.1: icmp_seq=236 ttl=64 time=8.00 ms
64 bytes from 10.0.0.1: icmp_seq=238 ttl=64 time=7.98 ms
64 bytes from 10.0.0.1: icmp_seq=246 ttl=64 time=16.4 ms
64 bytes from 10.0.0.1: icmp_seq=253 ttl=64 time=7.53 ms
64 bytes from 10.0.0.1: icmp_seq=270 ttl=64 time=8.42 ms
64 bytes from 10.0.0.1: icmp_seq=275 ttl=64 time=8.22 ms
64 bytes from 10.0.0.1: icmp_seq=276 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=284 ttl=64 time=8.03 ms
64 bytes from 10.0.0.1: icmp_seq=296 ttl=64 time=7.65 ms
64 bytes from 10.0.0.1: icmp_seq=302 ttl=64 time=8.00 ms
64 bytes from 10.0.0.1: icmp_seq=306 ttl=64 time=7.66 ms
64 bytes from 10.0.0.1: icmp_seq=311 ttl=64 time=7.59 ms
64 bytes from 10.0.0.1: icmp_seq=322 ttl=64 time=8.06 ms
64 bytes from 10.0.0.1: icmp_seq=327 ttl=64 time=8.01 ms
64 bytes from 10.0.0.1: icmp_seq=331 ttl=64 time=8.02 ms
64 bytes from 10.0.0.1: icmp_seq=332 ttl=64 time=7.75 ms
64 bytes from 10.0.0.1: icmp_seq=341 ttl=64 time=8.28 ms
64 bytes from 10.0.0.1: icmp_seq=349 ttl=64 time=8.23 ms
64 bytes from 10.0.0.1: icmp_seq=350 ttl=64 time=8.27 ms
64 bytes from 10.0.0.1: icmp_seq=351 ttl=64 time=7.87 ms
64 bytes from 10.0.0.1: icmp_seq=352 ttl=64 time=7.90 ms
64 bytes from 10.0.0.1: icmp_seq=359 ttl=64 time=7.92 ms
64 bytes from 10.0.0.1: icmp_seq=360 ttl=64 time=7.95 ms
64 bytes from 10.0.0.1: icmp_seq=368 ttl=64 time=7.86 ms
64 bytes from 10.0.0.1: icmp_seq=371 ttl=64 time=14.7 ms
64 bytes from 10.0.0.1: icmp_seq=372 ttl=64 time=7.61 ms
64 bytes from 10.0.0.1: icmp_seq=376 ttl=64 time=7.95 ms
64 bytes from 10.0.0.1: icmp_seq=387 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=391 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=392 ttl=64 time=8.27 ms
64 bytes from 10.0.0.1: icmp_seq=393 ttl=64 time=7.88 ms
64 bytes from 10.0.0.1: icmp_seq=407 ttl=64 time=8.18 ms
64 bytes from 10.0.0.1: icmp_seq=410 ttl=64 time=7.68 ms
64 bytes from 10.0.0.1: icmp_seq=418 ttl=64 time=8.19 ms
64 bytes from 10.0.0.1: icmp_seq=439 ttl=64 time=7.60 ms
64 bytes from 10.0.0.1: icmp_seq=450 ttl=64 time=7.59 ms
64 bytes from 10.0.0.1: icmp_seq=465 ttl=64 time=7.54 ms
64 bytes from 10.0.0.1: icmp_seq=470 ttl=64 time=7.58 ms
64 bytes from 10.0.0.1: icmp_seq=479 ttl=64 time=8.08 ms
64 bytes from 10.0.0.1: icmp_seq=482 ttl=64 time=7.96 ms
64 bytes from 10.0.0.1: icmp_seq=498 ttl=64 time=8.15 ms
64 bytes from 10.0.0.1: icmp_seq=499 ttl=64 time=8.14 ms
64 bytes from 10.0.0.1: icmp_seq=514 ttl=64 time=8.06 ms
64 bytes from 10.0.0.1: icmp_seq=522 ttl=64 time=7.57 ms
64 bytes from 10.0.0.1: icmp_seq=527 ttl=64 time=7.95 ms
64 bytes from 10.0.0.1: icmp_seq=531 ttl=64 time=8.08 ms
64 bytes from 10.0.0.1: icmp_seq=540 ttl=64 time=7.60 ms
^C
--- 10.0.0.1 ping statistics ---
546 packets transmitted, 100 received, +6 errors, 81% packet loss, time 546190ms
rtt min/avg/max/mdev = 7.505/8.136/16.441/1.325 ms, pipe 3



Ben Yahmed

------------------------------------------------------------------------

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