Patent ID: 9204307
Filing Date: 2015-12-01
Classification: H04W

Abstract:
1. An operation method of a source base station in a Cognitive Radio (CR) system, the operation method comprising: occupying at least one channel in a first mode based on an operation channel and a backup channel of a neighbor cell; selecting at least one channel for a second mode when there is no channel to be occupied; and occupying available frames among frames of the selected at least one channel in the second mode based on a frame request, wherein the backup channel comprises a channel for channel switching in which a target base station releases the operation channel and replaces the released operation channel with the backup channel, if the source base station transmits a channel request to the target base station, wherein the first mode comprises a mode in which a plurality of frames of any channel is occupied by one base station, and wherein the second mode comprises a mode in which a plurality of frames of any channel is shared by at least two base stations.