Patent ID: 11903009
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a base station in a wireless communication system, the method comprising:
receiving, from an information providing server managing a shared spectrum, information on an available frequency band of the shared spectrum, wherein the available frequency band includes at least one frequency band which is accessible by the base station with a priority;
measuring a channel quality for each of the at least one frequency band in the available frequency band; and
identifying an operation frequency band among the at least one frequency band based on a frequency assignment mode of the base station and the channel quality,
wherein the frequency assignment mode is configured by the information providing server, and includes a first mode applying a weight value based on a received signal strength indicator (RSSI) value for reducing interference from other cell, a second mode applying a weight value based on a reference signal received power (RSRP) value for performing a handover without changing frequency band, and a third mode applying different weight values based on a combination ratio of the first mode and the second mode, and
wherein the identifying further comprises:
selecting, based on the first mode, a frequency band with a lowest RSSI value as the operation frequency band,
selecting, based on the second mode, a frequency band of a neighbor cell with a highest RSRP value in a neighbor cell list of the base station as the operation frequency band, and
selecting, based on the third mode, a frequency band corresponding to a largest one of the RSSI value or the RSRP value multiplied by the different weight values based on the combination ratio as the operation frequency band, and
wherein the selecting, based on the second mode, further comprises:
receiving, from a management server, information on at least one neighbor cell, and
updating the neighbor cell list based on the information on the at least one neighbor cell, wherein a number of neighbor cells included in the updated neighbor cell list is less than or equal to a threshold number.