Patent ID: 8483681

Claim:
A channel scanning method applied to a wireless communication system comprising: (a) performing, by a network device, in a first time period a first channel scanning procedure for scanning each of a plurality of channels to determine which of the channels is capable of establishing a corresponding connection, and setting each of the channels capable of establishing corresponding connections to be a target channel, thereby creating a subset of target channels, wherein the first channel scanning procedure is associated with a first data transceiving stoppage time; and (b) performing, by the network device, in a later time period a second channel scanning procedure for scanning only the subset of target channels to determine which of the target channels is capable of establishing a connection and updating the subset of target channels by omitting from the target channels any channel not determined to be capable of establishing a connection, wherein the second channel scanning procedure is associated with a second data transceiving stoppage time that is less than the first data transceiving stoppage time; wherein step (a) and step (b) are repeated, wherein a number of repetitions of step (b) is greater than a number of repetitions of step (a), and wherein the number of repetitions of step (a) is a function of the number of repetitions of step (b); wherein sequentially scanning channels of a first channel set of the channels occurs in a first sub-period of the first period; and sequentially scanning channels of a second channel set of the channels occurs in a second sub-period of the first period.