Method for sensing whitespace in a wireless LAN system, and apparatus for performing same
Provided is a method for sensing a channel of a whitespace band in a wireless LAN system. A method for sensing and reporting a channel of a whitespace band in a wireless LAN system according to one embodiment of the present invention comprises the steps of: receiving a sensing request including a candidate report channel and a target channel of a whitespace band to be sensed; sensing the target channel; and determining a channel for transmitting sensed results in accordance with whether a licensed user is detected on the target channel, and transmitting the sensed results.
1. A method for transmitting a sensing result frame in a wireless local area network (WLAN) system, the method comprising:
receiving, at a station (STA) a sensing request frame including a channel number field indicating a channel for which the sensing applies; and
transmitting, by the STA the sensing result frame including information indicating whether a primary signal has been detected in the channel, wherein the primary signal is a signal that requires protection,
wherein the sensing result frame field further includes an unidentified signal bit indicating whether a high power of uncharacterized type has been detected in the channel.
2. The method of claim 1 ,
wherein the Primary Signal field is set to 1 when the primary signal is detected, and
wherein Primary Signal field is set to 0 when the primary signal is not detected.
3. The method of claim 1 ,
wherein the sensing request frame further includes:
a start time field indicating a time point at which the sensing starts, and
a duration field indicating a duration of the sensing.
4. The method of claim 1 ,
wherein the sensing result frame further includes:
a channel number field indicating a channel on which the sensing is performed,
a start time field indicating a time point at which the sensing starts, and
a duration field indicating a duration over which the sensing was performed.
5. A method for transmitting a sensing request in a wireless local area network (WLAN) system, the method comprising:
transmitting, by an access point (AP) the sensing request frame including a channel number field indicating a channel for which the sensing applies; and
receiving, at the AP a sensing result frame including information indicating whether a primary signal has been detected in the channel, wherein the primary signal is a signal that requires protection,
wherein the sensing result frame further includes an unidentified signal bit indicating whether a high power of uncharacterized type has been detected in the channel.
6. The method of claim 5 ,
wherein the Primary Signal field is set to 1 when the primary signal is detected, and
wherein Primary Signal field is set to 0 when the primary signal is not detected.
7. The method of claim 5 ,
wherein the sensing request frame further includes:
a start time field indicating a time point at which the sensing starts, and
a duration field indicating a duration of the sensing.
8. The method of claim 5 ,
wherein the sensing result frame further includes:
a channel number field indicating a channel on which the sensing is performed,
a start time field indicating a time point at which the sensing starts, and
a duration field indicating a duration over which the sensing is performed.
9. A station for transmitting a sensing result frame in a wireless local area network (WLAN) system, the station comprising:
a receiver for receiving a sensing request frame including a channel number field indicating a channel for which the sensing applies; and
a transmitter for transmitting the sensing result frame including information indicating whether a primary signal has been detected in the channel, wherein the primary signal is a signal that requires protection,
wherein the sensing result frame further includes an unidentified signal bit indicating whether a high power of uncharacterized type has been detected in the channel.
10. An access point (AP) for transmitting a sensing request in a wireless local area network (WLAN) system, the AP comprising:
receiver for transmitting the sensing request frame including a channel number field indicating a channel for which the sensing applies; and
transmitter for receiving a sensing result frame including information indicating whether a primary signal has been detected in the channel, wherein the primary signal is a signal that requires protection,
wherein the sensing result frame further includes an unidentified signal bit indicating whether a high power of uncharacterized type has been detected in the channel.