Method of getting energy level of communication channel

摘要

Provided is a method of getting an energy level of a communication channel including skipping two channels and performing energy detection scanning when an energy level higher than an energy threshold of a wireless LAN network is detected during a process of sequentially performing the energy detection scanning according to channels, reducing a time consumed for the energy detection scanning.

主权项

1. A method of getting an energy level of a communication channel including scanning an energy level from a first channel having a smallest number to a final channel having a largest number of a plurality of communication channels having numbers sequentially increased one by one in a direction in which a frequency is increased or reduced, in an energy detection frequency region, the method comprising:
(A) setting the first channel as a subject channel; (B) performing energy detection scanning of the subject channel; (C) comparing the energy level obtained in step (B) with an energy threshold of a wireless LAN network; (D) storing the obtained energy level when the obtained energy level is larger than the energy threshold of the wireless LAN network as a result of the comparison in step (C); (E) setting the subject channel in step (D) as a completion channel; (F) setting a channel having a channel number larger than that of the completion channel set in step (E) by 3 as a subject channel; (G) performing energy detection scanning of the subject channel set in step (F); (H) comparing the energy level obtained in step (G) with the energy threshold of the wireless LAN network; (I) storing the obtained energy level when the obtained energy level is larger than the energy threshold of the wireless LAN network as a result of the comparison in step (H); (J) setting a channel having a channel number larger than that of the subject channel of the previous step by 1 as a subject channel; and (K) feeding back to step (B) when the channel number of the subject channel of the previous step is smaller than that of the final channel, and completing the method when the channel number of the subject channel of the previous step is larger than that of the final channel.