Unidirectional Bluetooth (after paired one time)

Hi,

I tryed to find an answer in a correct thread before opening a new one without any result, so I', openning a new thread.

Our project need to do the following:
To have a Bluetooth compatible transmitter that could transmit to a normal Android phone at more distance that the normal phone can.

That means that we paired the phone and the Bluetooth module at a close distance, then the module start to transmit (at a very very low rate, 8 bytes every 10 second is enough), but if the phone go away a long distance (more than 30 meters) and the module can't receive an acknowledge, the module MUST continue to transmit all the time.
We are trying to figure out if we can do this with Bluetooth.

could this be done ?

Best Regards,

Christian