Method for transmitting/receiving a signal in a wireless communication system
According to an embodiment of the present invention, a method of transmitting/receiving a signal of a device using a non-licensed band in a wireless communication system includes: receiving available channel information by a first type device; and determining a first channel for transmitting a signal from the first type device to a second type device, and a second channel for receiving a signal from the second type device, among the available channels.
1. A method for receiving a signal, by a first device from a second device, using an unlicensed band in a wireless communication system, the method comprising:
receiving, by the first device, available channel information comprising:
one or more first available channels for the first device; and
one or more second available channels for the second device;
determining, by the first device, whether a common channel between the one or more first available channels and the one or more second available channels exists or not;
when the common channel exists, receiving, by the first device, the signal from the second device through the common channel; and
when the common channel does not exist:
switching, by the first device, an operation band to a channel determined among the one or more second available channels; and
receiving, by the first device, the signal from the second device through the determined channel.
2. The method of claim 1 , wherein the first device broadcasts information regarding the determined channel.
3. The method of claim 2 , wherein the information regarding the determined channel comprises at least one of information regarding a channel number of the determined channel, operating time duration in the determined channel, information regarding time duration up to switch to the determined channel, and information regarding an identifier of a device for transmitting a signal received from the determined channel.
4. A first device using an unlicensed band in a wireless communication system, the first device comprising:
a transceiver; and
a processor configured to:
control the first device comprising the transceiver;
receive available channel information comprising:
one or more first available channels for the first device; and
one or more second available channels for a second device;
determine whether a common channel between the one or more first available channels and the one or more second available channels exists or not;
when the common channel exists, receive the signal from the second device through the common channel; and
when the common channel does not exist:
switch an operation band to a channel determined among the one or more second available channels; and
receive the signal from the second device through the determined channel.
5. The method of claim 1 , wherein the one or more first available channels for the first device are determined based on a geo-location information of the first device.