METHOD FOR SENSING CHANNEL DYNAMICALLY IN WIRELESS LAN SYSTEM AND APPARATUS THEREFOR

摘要

The present invention relates to a wireless communications system, and more particularly to a method for sensing a channel dynamically in a wireless LAN system and an apparatus therefor. A method for performing a back-off in a wireless LAN system according to an embodiment of the present invention includes the steps of performing CCA by applying clear channel assessment conditions in order to transmit a data unit with a different channel width, and performing a back-off based thereon.

主权项

1. A method for performing backoff in a wireless LAN (WLAN) system, the method comprising:
performing, when transmission of a data unit having a size greater than or equal to a first channel width is intended, a first backoff process on a first primary channel having a size of a second channel width less than or equal to the first channel width, using a first clear channel assessment (CCA) condition; performing, when transmission of a data unit having a size greater than or equal to a third channel width is intended, a second backoff process on a second primary channel having a size of a fourth channel width less than or equal to the third channel width, using a second CCA condition; and transmitting, when a transmission opportunity (TXOP) is allowed as a result of the first backoff process, the data unit having the size greater than or equal to the first channel width and transmitting, when the TXOP is allowed as a result of the second backoff process, the data unit having the size greater than or equal to the third channel width.