Patent ID: 9301149
Filing Date: 2016-03-29
CPC Classification: H04B,H04W

Claim Text:
1. A method for allocating channels, the method comprising: receiving information including a list of available channels from a TVWS (television white space) database; selecting a non-overlapping channel for each TVBD (television band device) network or device among a plurality of TVBD networks including a first network, a second network, and a third network or devices; transmitting information including the non-overlapping channel to each TVBD network or device; and providing a common clock to both the first network and the second network at every timing corresponding to a least common multiple (LCM) of a frame length of the first network and a frame length of the second network, wherein when coexistence contours of the first network and the second network, which indicate distances guaranteeing a particular signal strength or transfer rate, overlap each other and a specific channel is used by the first network, the specific channel in a coexistence white space map for the second network is marked as being occupied by a TV device other than the first network, and wherein the third network is provided with a silent duration at the every timing corresponding to the LCM of the frame length of the first network and the frame length of the second network if a frame length of the third network does not correspond to the LCM of the frame length of the first network and the frame length of the second network.