US 12,335,882 B2
Base station, communication system, communication method, and non-transitory computer-readable medium
Yoshio Ueda, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/629,447
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Feb. 3, 2021, PCT No. PCT/JP2021/003992
§ 371(c)(1), (2) Date Jan. 24, 2022,
PCT Pub. No. WO2021/199666, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-060940 (JP), filed on Mar. 30, 2020.
Prior Publication US 2022/0248351 A1, Aug. 4, 2022
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/001 (2013.01) 13 Claims
OG exemplary drawing
 
1. A base station as a second base station, comprising:
at least one memory; and
at least one processor coupled to the at least one memory,
wherein the at least one processor is configured to acquire, from a first base station of a plurality of first base stations, frequency accuracy information indicating frequency accuracy of the first base station in a wireless manner or via a backhaul,
acquire, from the plurality of first base station, in a wireless manner or via a backhaul, the frequency accuracy information of the first base station, synchronization status information indicating a synchronization status of the first base station, and stratum level information indicating a stratum level of the first base station, the stratum level corresponding to the number of relay base stations existing in a synchronization path between the first base station and the other base station that performs GPS (Global Positioning System) synchronization,
select a synchronization source base station from the plurality of first base stations, based on the frequency accuracy information, the synchronization status information, and the stratum level information of the plurality of first base stations, and
synchronize with the first base station selected as the synchronization source base station using network listening.