US 12,438,611 B2
Switching device and switching method
Yohei Hasegawa, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC Corporation, Tokyo (JP)
Filed on Mar. 13, 2023, as Appl. No. 18/120,629.
Claims priority of application No. 2022-082192 (JP), filed on May 19, 2022.
Prior Publication US 2023/0379052 A1, Nov. 23, 2023
Int. Cl. H04B 10/073 (2013.01); H04B 10/077 (2013.01); H04Q 11/00 (2006.01)
CPC H04B 10/0775 (2013.01) [H04Q 11/0005 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A switching device comprising:
an optical communication unit configured to receive an optical communication signal; and
a control unit configured to switch a path for the optical communication unit to receive an optical communication signal based on at least one of reception power of the optical communication signal received by the optical communication unit, an error rate of a synchronous signal therefor, an error rate after signal demodulation thereof, an error rate after error correction decoding thereof, and an SN (Signal-to-Noise) ratio of the path for the optical communication signal,
wherein the optical communication unit transmits a test optical communication signal to another switching device and receives a result of reception of the test optical communication signal obtained in the other switching device, and
the control unit determines a priority of a link with the other switching device based on the result of the reception of the test optical communication signal obtained in the other switching device.