Patent ID: 7966415

Claim:
A communication apparatus having a normal power consumption mode and a power saving mode lower in power consumption than in the normal power consumption mode, the communication apparatus comprising: a communication unit configured to connect to a network via a network interface device and communicate with a device on the network; an acquisition unit configured to acquire, from the network interface device, capability information indicating a communication capability of the device; a determination unit configured to, based on the capability information acquired by the acquisition unit, determine a communication mode to be used when the network interface device communicates with the device under a condition that the communication apparatus has shifted to the power saving mode; and a setting unit configured to, when the communication apparatus shifts from the normal power consumption mode to the power saving mode, set the communication mode determined by the determination unit as a communication mode to be used when the network interface device communicates with the device, wherein the determination unit is configured to determine a communication speed to be used when the network interface device communicates with the external device under a condition that the communication apparatus has shifted to the power saving mode, wherein the determination unit is configured to determine a lower speed from a plurality of communication speeds, which the external device can operate, as the communication speeds, which the external device can operate, as the communication speed to be used when the network interface device communicates with the device under a condition that the communication apparatus has shifted to the power saving mode.