kernel error -110

Hi
Env: Debian 9.9 4.9.0-9-686-pae
Connected to internet via usb tethering with Android device
Prb : Randomly (once a week) Debian disconnect from network
Action:restarting network does not reconnect
Investigating ...
at trouble time i always find this kernel error msg
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usb 2-7 device descriptor read/64 error -110
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modprobe usbcore permit me to access the device again
via filemanager,but rndis interface does not reconnect

Searching internet i cannot find error -110 explanation
is an hardware error ? or a software problem ?

reboot the pc restore normal operations .
any help will be appreciated
Maurizio