Gateway Device Wake-Up via HTTP Tunneling

The patent introduces a management server as an intermediary that receives wake-up requests from the cloud server and forwards them to the gateway-enabled device through alternative communication channels (email, fax) that are not blocked by firewalls. This mediator enables indirect communication when direct communication is blocked, allowing the device to be woken up from deep sleep mode while maintaining energy savings.

The patent implements preliminary authentication and session establishment before the device enters deep sleep mode. The management server stores authentication results and session information, so when the device needs to wake up for HTTP tunneling, the authentication and negotiation processes have already been completed in advance, eliminating the need to repeat these processes and reducing server load.

The patent implements periodic wake-up checks where the gateway-enabled device periodically wakes up from deep sleep mode to check for pending print jobs or communication requests. During these periodic wake-ups, the device can receive wake-up requests through alternative channels (email, fax) and establish HTTP tunneling sessions only when necessary, rather than maintaining continuous communication. This periodic action pattern ensures print job reception capability while allowing the device to remain in energy-saving mode most of the time.