Long distance wireless networking
14/02/2018 9:30
I have a need to tie in a number (up to say 50) of points spread overabout 4 square miles. There is a centrally located base station, whichcould accomodate a larger aerial if needed. I have PCs with USB, ethernet,and serial ports. The communication is low-bandwidth; each unit sends outa short string - about 100 bytes - every minute or so. Timing is notcritical.

We have tried using radio modems that are supposed to do collisiondetection; the problem is that while all radios can reach the basestation, not all radios can hear each other so they end up stepping oneach other.

I guess we're looking at some sort of polled system or a token-ringsystem. It would be nice, but not required, to be able to push updates toeach unit; the updates take about 3-5 minutes at 9600 baud, during whichtime the other units should keep quiet.

This would be used in a rural area; the obstructions are hills and trees,not buildings.

Anyone aware of any existing technology that can do this? TIA...


Source is Usenet: comp.os.linux.networking
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Answer score: 5
14/02/2018 9:30 - whichethernet,outon Not clear what you are using at the base station, but max power,unlicensed APs may or may not provide the operating modes(s) yourequire, eg., repeater, bridge, and AP simultaneously.

Using licensed or unlicensed spectrum/products? By radios do youmean access points for clients or bridges between lan segments? Also not clear what stepping on each other means. Clarify? updates towhichtrees, If wireless is the way you need to go, you can try this Ciscobackground doc and see if it provides any ideas. It is almostcertainly over kill for your needs, but covers severalprovisioning/topology schemes. I may have some other links layingabout.

http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/wireless.htm hth,prg

Source is Usenet: comp.os.linux.networking
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