Are there any network protocol that we can use at competition?

[Nirvash]

Originally Posted by EricH

IIRC, Bluetooth also operates in the 2.4GHZ range; thus, be cautious. I suggest reading T5 as well as T4--they are not kidding about anything in that. The field staff can sniff out networks in the 802.11 band (and other stuff like that)--if they say to shut it off, hit the power switch immediately.

You might be able to use a router that operates in another band entirely.

Bluetooth does use the 2.4GHz range yes, it however is not a 802.11 protocol (as listed in the rules) and 2.4GHz will not interfere with the field.
For United states competitions 5GHz is used, I believe though in some other countries, 5GHz is a restricted band and 2.4GHz is used.
There is no reason one should have to shut off a bluetooth system unless there is an FTC completions also going on, as they do use a 2.4GHz system for their control system (Bluetooth).