Need fast way for Bluetooth piconet of four devices to continue communicating when master shuts off

I have a piconet of 4 devices, where 1 device is a master and 3 devices are slave.

Communication continuously occurs between master and the slaves.

But then the master is shutdown at an arbitrary time.

What's the fastest way for the remaining 3 devices to continue to communicate?

Does this require the discovery process to repeat, and links reestablished? Or is there a faster way to restore communication?

-Ken

Software Engineer