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

Claim 4:
5. A first base station in a wireless communication system, the first base station comprising:
a transceiver configured to transmit or receive a signal; and
at least one processor coupled with the transceiver and configured to:
receive, 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 first base station with a priority,
measure a channel quality for each of the at least one frequency band in the available frequency band, and
identify an operation frequency band among the at least one frequency band based on a frequency assignment mode of the first 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 at least one processor is further configured to identify the operation frequency band by:
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 first 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.