Old protocols, new protocols, online protocols, realtime protocols... it really doesn't matter so long as they (and your subs) serve you and you don't serve them.
In fact, a lot of folk are most disturbed by uppity subs who are so bold as to ask rather than wait and be asked (or told.) Not me, I like a submissive who wants me so much she asks to be used. But that's rare, they're more scared of rejection than they are of not being asked... so I say take... I mean ask and watch his eyes light up.
As to how... seems to me that should in a manner that suits your nature, pleases you, and offers a hint of how delightful life under your dominion might be.