UDP Communication in background mode?

Hi,

I have a hardware connected to iPhone over bluetooth. Hardware sometimes send a UDP request which is being dropped if the app is in background. I found from all previous discussions that there is no way to handle UDP requests in background if the app is suspended. And our app doesn't qualify to keep the app in background forever.

1. Is there any latest update or other suggested way to handle these UDP requests.
2. How does Apple watch app handle such cases where a watch app sends a UDP request ?

Thanks in advance