View Single Post
  #1   Spotlight this post!  
Unread 31-05-2009, 16:14
EHaskins EHaskins is offline
Needs to change his user title.
AKA: Eric Haskins
no team (CARD #6 (SCOE))
Team Role: College Student
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Elkhorn, WI USA
Posts: 998
EHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond reputeEHaskins has a reputation beyond repute
Send a message via MSN to EHaskins
Re: Wireless Router to Connect with Driver Station

Quote:
Originally Posted by fimmel View Post
OK, That would make sense i just was not sure, hence the disclaimer. Also it would be an interesting test to measure the bandwidth used, I'm not sure how you could do it but im fairly positive DD-WRT has bandwidth monitoring, however im not sure if that only between LAN and WAN not two LAN devices.

...Forest
Each communication packet between the robot and DS is aprox. 1kbyte, and the robot replies once to each message. Then add in dashboard data, which is also 1kbyte, and communication to/from the FMS, again aprox. 1kbyte each direction. All of this communication takes place at 50hz.

Even leaving significant margin for error, by my calculation the total bandwidth required for a robot is less than 0.5mbyte/sec/robot. Or less than 5mbps, which is well below the 11mbps B provides. That calculation has an even larger margin since in most situations the dashboard data and FMS data will not be sent over the wireless link, reducing the required bandwidth by more than half.

That said, latency could potentially become an issue with lower bandwidth signals.
__________________
Eric Haskins KC9JVH
Reply With Quote