Patent ID: 11943659
Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A terminal accessing an access point (AP) in a wireless communication system, the terminal comprising:
a communicator configured to communicate with a plurality of APs;
a memory storing one or more instructions; and
at least one processor configured to execute the one or more instructions to:
receive a beacon frame comprising first load information of an accessed AP per radio channel unit;
determine whether to maintain an accessed radio channel of the accessed AP, based on the first load information;
receive a beacon frame comprising second load information of an AP near the terminal in case that it is determined not to maintain the accessed radio channel;
determine a radio channel to be accessed based on second load information and channel interference information; and
access the determined radio channel,

wherein the at least one processor is further configured to execute the one or more instructions to determine the radio channel to be accessed by:
measuring a received signal strength indicator (RSSI) of a signal received from the AP near the terminal;
determining whether channel interference of the AP near the terminal occurs, based on the measured RSSI and an adjacent channel power leakage ratio having a pre-determined value according to a channel distance,
obtaining a sum of channel load quantities of channels interfering with the radio channel of the accessed AP in case that the channel interference of the AP near the terminal occurs,
obtaining a weight value based on the sum of the channel load quantities and a channel load quantity of the radio channel to be accessed, wherein the weight value is inversely proportional to the sum of the channel load quantities,
obtaining an expected value of an average spectral efficiency of the radio channel to be accessed, based on the average spectral efficiency of the radio channel to be accessed, and

obtaining a resource efficiency of the radio channel to be accessed based on the weight value and the expected value of the average spectral efficiency.