[robocup-humanoid] Summary of rule discussions in Mexico/Regarding WiFi

[Alejandro Malo Tamayo]

Dear humanoid teams
Regarding the WiFi limitations and restrictions please see the respective sections of the wikipedia WiFi entry. That might give more insight into the problem. 

As a user I realize that WiFi is an evolving standard. If I understand correctly the number of channles is geographically dependent. It has between 11 and 14 channels (Link Layer), but they are overlapping channels, non overlapping channels must differ by five or more. So really there are only three independent channels. In Mexico, if I remember correctly each team had a subnet (Internet layer). 36  humanoid teams, not considering other categories.  They had to share channels. You might also consider restricting the use of channels.

Best regards
Alejandro Malo

On Sep 2, 2012, at 4:31 AM, Daniel Seifert <dseifert at fumanoids.de> wrote:

> Dear humanoid teams,
> 
> on behalf of the Technical Committee, please find below a short
> summary on the rule discussions and votes held in the team leader
> meetings at RoboCup 2012 in Mexico City.
> 
> -----------------------
> 
> Considering the usual WiFi problems at the venue, discussions were
> held regarding how to minimize this issue in the next year(s).
> 
> Possible approaches:
> - reduction of bandwidth/team to 500kbit/s
> - using 5 GHz band
> - hidden ESSID
> - using a WEP-Key so visitors can not accidentially connect to AP
> (majority of teams indicated that their robots support WEP)
> - using a WEP-Key per game to minimize interference with other teams
> still connected to this field
> 
> 
> -----------------------
> 
> dseifert at fumanoids.de
> Phone +49 30 838 75-117 (Office), -125 (Lab)
> 
> Freie Universität Berlin
> Institut für Informatik
> AG Intelligente Systeme und Robotik
> Arnimallee 7
> 14195 Berlin
> Germany
> _______________________________________________
> robocup-humanoid mailing list
> robocup-humanoid at cc.gatech.edu
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Alejandro J. Malo Tamayo
Control Automático/Cinvestav
Av IPN 2508
Mexico 07300
http://www.ctrl.cinvestav.mx
alexmalo at ctrl.cinvestav.mx