Android : Android, get the object of a running service

Background: I'm running a background service (independent of the app opened or not) to maintain connection with Tizen-based app on Gear2 (not Android, hence the manual maintenance).

Whenever my phone apps (multiple apps) have data to send to send to the service, I need to get the 'connection' object inside the service and call 'send'.

So my question is: how can I get running service object?

If I can get that service, my code will be like this:

MyConnection  connection = runningService.getConnection()
connect.send(message); 

Thanks.