Method and apparatus for transmitting and receiving channel information in wireless communication system
One embodiment of the present invention relates to a method for transmitting channel information in a wireless communication system. Disclosed is method for transmitting channel information, comprising the steps of: generating a frame which includes an operating class field and a channel number field; and transmitting the generated frame, wherein the channel number field indicates a number of a wireless local area network (WLAN) channel allocated according to available channel information.
1. A method of setting an operation channel for a second station (STA) in a whitespace by a first STA, the method comprising:
acquiring information regarding available TV channels from a geo-location database; and
transmitting setting information regarding the operation channel, determined based on the information regarding the available TV channels, to the second STA,
wherein the operation channel is defined as a channel structure from among a plurality of channel structures, including channel widths consisting of two non-contiguous frequency parts, each of which including two contiguous W MHz channels when a minimum channel bandwidth supported by the operation channel is W MHz.
2. The method according to claim 1 , wherein:
the operation channel is defined as being present spaced apart from a channel starting frequency by a predetermined frequency; and
the setting information regarding the operation channel comprises information regarding the predetermined frequency.
3. The method according to claim 2 , wherein the predetermined frequency is set to be an integer multiple of W when the minimum channel bandwidth supported by the operation channel is W MHz.
4. The method according to claim 1 , wherein the plurality of channel structures includes:
(a) one W MHz channel width;
(b) two contiguous W MHz channel widths;
(c) four contiguous W MHz channel widths; and
(d) two non-contiguous W MHz channel widths.
5. The method according to claim 4 , wherein the channel starting frequency is a frequency of a first channel of the available TV channels.
6. The method according to claim 4 , wherein one W MHz channel is positioned in a center of one TV channel of the available TV channels.
7. The method according to claim 4 , wherein the operation channel and the available TV channels are spaced apart from each other by a predetermined guard interval.
8. The method according to claim 7 , wherein the primary channel for each of the operation channels corresponding to (c) is set to be the same frequency location.
9. The method according to claim 7 , wherein clear channel assessment (CCA) is performed on each of the operation channels corresponding to (a) to (d) using the primary channel.
10. The method according to claim 4 , wherein a location of the operation channel is specified according to a location of a primary channel with W MHz.
11. The method according to claim 4 , wherein:
the first STA is an enabling STA; and
the second STA is a dependent STA.
12. A method of receiving operation channel setting information from a first station (STA) in a whitespace by a second STA, the method comprising:
receiving setting information regarding the operation channel determined based on information regarding available TV channels from the first STA; and
determining a location of the operation channel based on the operation channel setting information,
wherein the operation channel is defined as a channel structure from among a plurality of channel structures, including channel widths consisting of two non-contiguous frequency parts, each of which including two contiguous W MHz channels when a minimum channel bandwidth supported by the operation channel is W MHz.
13. A first station (STA) apparatus for setting an operation channel for a second station (STA) in a whitespace, the first STA apparatus comprising:
a transceiver configured to perform transmission and reception with other devices; and
a processor configured to:
control the first STA comprising the transceiver;
acquire information regarding available TV channels from a geo-location database (DB); and
transmit setting information regarding the operation channel, determined based on the information regarding the available TV channels, to the second STA using the transceiver, and
wherein the operation channel is defined as a channel structure from among a plurality of channel structures, including channel widths consisting of two non-contiguous frequency parts, each of which including two contiguous W MHz channels when a minimum channel bandwidth supported by the operation channel is W MHz.
14. A second station (STA) apparatus for receiving operation channel setting information from a first STA in a whitespace, the second STA comprising:
a transceiver configured to perform transmission and reception with other devices; and
a processor configured to:
control the second STA comprising the transceiver;
receive setting information regarding the operation channel, determined based on information regarding available TV channels from the first STA; and
determine a location of the operation channel based on the operation channel setting information, and
wherein the operation channel is defined as a channel structure from among a plurality of channel structures, including channel widths consisting of two non-contiguous frequency parts, each of which including two contiguous W MHz channels when a minimum channel bandwidth supported by the operation channel is W MHz.