Question about scatternet

Hi, Im working with Bluetooth, more precisely, with scatternet type ( one master and more than one slave). When a master is transmitting/sending information to a particular slave, the master must leave the connection openned with the other slaves, or it must close the connection? Or put them in spark/low mode or else? I had been searching in Internet and documentation an answer to my problem, but there is nothing. I need this question because I have to write C code for an aplication of bluetooth. Could you help me or give the URL to HOWTOSa/tutorial...??