How To Fire An Event

Hello,

I would like to fire an event from my control and listen to that in another control.

I know this can be done with a publish subscribe mechanish using busevent

var bus = sap.ui.getCore().getEventBus();

bus.publish("MY_EVENT");

I would however not want to do it this ways as I think its very lose in nature.

I would like to fire an event from control A and then be able to listen to it in control B on the instance of A say oA.

Whats the best way to fire an event?

Please help!

Thanks

Amjad