Method and Apparatus for Transmitting Channel Information in Cognitive Radio Network and Method and Apparatus for Performing Channel Switching

An apparatus for transmitting information of a channel used by a station from among TV white space channels, the apparatus comprising:

• a radio frequency (RF) unit;
• and
• a processor,
• wherein the processor determines one or more channels used by the station from among channels contained in a plurality of OFDM blocks, each OFDM block including one or more contiguous channels from among the TV white space channels, and generates a message including first information indicating the lowest channel number from among channels contained in a first OFDM block, second information indicating the lowest channel number from among channels contained in a second OFDM block, third information indicating the one or more channels used by the station as bitmap information, and fourth information indicating a total amount of bandwidth used by the station.

A method for indicating channel switching by a station that uses TV white space channels, the method comprising:

• determining one or more channels used by the station from among channels contained in a plurality of OFDM blocks, wherein each OFDM block includes one or more contiguous channels from among the TV white space channels;
• determining whether an interference occurs in the one or more channels used by the station;
• determining whether the interference is caused by a primary user;
• and
• transmitting a message indicating channel switching when the interference is caused by the primary user,
• wherein the message includes first information indicating the lowest channel number from among channels contained in a first OFDM block, second information indicating the lowest channel number from among channels contained in a second OFDM block, third information indicating one or more channels to be used by the station as bitmap information, and fourth information indicating a total amount of bandwidth to be used by the station, wherein the first to fourth information indicates one or more channels to be used after completion of the channel switching.

An apparatus for indicating channel switching by a station that uses TV white space channels, the apparatus comprising:

• a radio frequency (RF) unit;
• and
• a processor,
• wherein the processor determines one or more channels used by the station from among channels contained in a plurality of OFDM blocks, each OFDM block including one or more contiguous channels from among the TV white space channels, determines whether an interference occurs in the one or more channels used by the station, determines whether the interference is caused by a primary user, and transmits a message indicating channel switching when the interference is caused by the primary user,
• wherein the message includes first information indicating the lowest channel number from among channels contained in a first OFDM block, second information indicating the lowest channel number from among channels contained in a second OFDM block, third information indicating one or more channels to be used by the station as bitmap information, and fourth information indicating a total amount of bandwidth to be used by the station, wherein the first to fourth information indicates one or more channels to be used after completion of the channel switching.