US Patent 10536828 Keeping radio resource control activity after SMS wakeup

A vehicle includes a gateway and a telematics controller. The controller is programmed to generate a signal to transition the gateway from sleep to powered state responsive to receipt of a wakeup message over a network; initialize a gateway cloud connector and a timer to periodically send ping messages to keep radio resource control alive; and responsive to inactivity over the network for a predefined period, discontinue the timer and transition the gateway from powered to sleep state.