Hi
I'd say that cabling will be surely more stable and with lower latency then wireless in most of cases. For time sensitivity application, wireless is not the best option.
If your device is working at best coverage possible( at least -65 dBm RSSI and 35 dB SNR) and still you are facing disconnection then there isn't too much you can do on the infrastructure side.
Depending on the WLC version you can play with AVC(Application Visibility Control) and ATF(Air Time Fairness).
And of course, the wired network must imprement proper QoS policy as well.
-If I helped you somehow, please, rate it as useful.-