Patent ID: 7860537

Claim:
A detecting method for saving electrical power consumption of a communication device, comprising: providing a receiving end, wherein an operation cycle of the receiving end comprises a hibernation mode and an operation mode; after a first time period, switching the receiving end from the hibernation mode to the operation mode, wherein the receiving end in the hibernation mode is supplied with a first electric power, and the receiving end in the operation mode is supplied with a second electric power; switching to the operation mode, wherein the receiving end detects a signal for communication sent from a sending end in a second time period; keeping the receiving end in the operation mode when receiving a plurality of first signals from the sending end; switching the receiving end from the operation mode to the hibernation mode if the receiving end does not detect the first signals after the second time period; and wherein the second time period is determined by a sending time parameter period, a buffer time parameter buf, and a transmission time parameter τ, and the second time period is (period+buf+τ).