IEEE802.11x versus TDMA UHF for mobile


Thread Starter

Guy Rousseau

Good morning,

I'm currently working on a mobile equipment project where we are trying to bring equipment health status to a central location. Our work environment are mostly open quarry.

Most of the suppliers are proposing us communication over IEEE802.11x technology but we also have another one proposing TDMA UHF 400MHz communication. Internally, we are a somewhat divided on which technology will be the best one to use. From the information I gathered, I came to this conclusion:


More recent and still a current technology
More support from many vendor (not tie to one specific vendor)
No specific licence to get
Need more access points to cover a large outside area
More prone to interferences
Security can be more at risk as there is more users on that technology
Large bandwidth but poor distance covered (??)


Outdated technology (what's the future?)
Need only one antenna to cover a very large distance
Main antenna and receptors cost more money than 802.11x technology
More resistant to interference
More suited for industrial application, especially moving equipment (??)
That's all the information that I got but I'm not sure of the validity of all of them. I would really appreciate to get your input on that subject matter. Any experience or opinion will be appreciated.

Best regards,

Guy Rousseau

Did you check into MOSCAD by Motorola - ?

This system can operate on a normal UHF voice frequency - even co-exist on the customers radio frequency.

I assume by health status of equipment, you are looking for alarm or analog status.If this is the case, there is no need for 802.11 broadband.

MOSCAD operates on COS(change of state)which transmits on alarm to a central location which is why it can coexist on a voice freq. and be mobile. It doesn't constantly poll like spread spectrum.

Bill Mackstutis
[email protected]