[ros-users] image transport saturating network

[Patrick Bouffard]

Hi Dan,

Thanks for posting your experiences. I'm curious, what type of
equipment was the built-in wireless on the robot?

Pat

On Wed, Apr 21, 2010 at 10:50 AM, Dan Lazewatsky
<lazewatskyd at cse.wustl.edu> wrote:
> In case anyone's interested, I resolved this problem by putting a
> wireless router (WRT54GS with DD-WRT) on top of the robot setup as a
> bridge instead of using the robot's built-in wireless.
>
> -Dan
>
> On 4/9/10 2:34 PM, Dan Lazewatsky wrote:
>> Hi all -
>> This isn't strictly a ROS question, but I was hoping people here would
>> have some thoughts. I'm grabbing video off a webcam on my robot and
>> using image transport to stream it to another computer on the same
>> wireless network. I'm having a problem where shortly after I start
>> subscribing to messages, my network latency skyrockets (like 1000ms+
>> ping times for computers on the same network, and bit rate on the
>> robot's wifi connection goes down to 1Mb/s from 54Mb/s). I had fixed
>> this problem a while ago by letting the router choose which channel to
>> use, but the problem came back and I haven't had any luck fixing it.
>> It's not a signal strength issue - iwconfig shows a link quality of
>> 90/100 or better. Any suggestions as to what might be going on would be
>> much appreciated.
>>
>> (I'm using a WRT54GS with DD-WRT)
>>
>> Thanks,
>> -Dan
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