That would make sense, since there's no such thing as a one-way GSM device. GSM towers (cells) need to keep track of which devices are in their vicinity and do smooth handovers to neighboring towers.
I'm not sure how the protocol you mentioned works, but I'd imagine it still needs some info about the whereabouts of the receiver to route the messages to him.
That would make sense, since there's no such thing as a one-way GSM device. GSM towers (cells) need to keep track of which devices are in their vicinity and do smooth handovers to neighboring towers.
I'm not sure how the protocol you mentioned works, but I'd imagine it still needs some info about the whereabouts of the receiver to route the messages to him.