US 12,224,850 B2
Monitoring apparatus, monitoring method, and non-transitory computer-readable medium containing program
Morihiko Ota, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/913,015
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 16, 2021, PCT No. PCT/JP2021/010514
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2021/200097, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-059470 (JP), filed on Mar. 30, 2020.
Prior Publication US 2023/0145196 A1, May 11, 2023
Int. Cl. H04J 14/02 (2006.01); H04B 10/079 (2013.01)
CPC H04J 14/02 (2013.01) [H04B 10/079 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A monitoring apparatus comprising:
hardware, including a processor and memory;
variable parameter changing unit implemented at least by the hardware and configured to change a variable parameter that is related to a characteristic of optical communication and is changeable for at least one of multiple network apparatuses that constitute an optical communication network transmitting optical signals by wavelength division multiplexing;
monitoring information acquisition unit implemented at least by the hardware and configured to acquire at least one piece of monitoring information related to a state of the optical communication from the at least one of the multiple network apparatuses;
estimation unit implemented at least by the hardware and configured to estimate at least one penalty for a network apparatus on a receiving side, which receives optical signals in the optical communication, among the multiple network apparatuses, using the monitoring information; and
improvement processing unit implemented at least by the hardware and configured to determine whether a transmission efficiency of the optical communication network can be improved, using the estimated penalty, and, if it is determined that the transmission efficiency can be improved, performs processing for changing a transmission scheme so that the transmission efficiency can be improved, by changing the transmission scheme from a first transmission scheme to a second transmission scheme whose transmission efficiency is improved from that of the first transmission scheme, wherein:
the monitoring information acquisition unit acquires at least an actual measured value of a first parameter of the monitoring information indicating a communication quality of an optical signal transmitted from a network apparatus on a transmitting side, which transmits the optical signals in the optical communication, among the multiple network apparatuses, to the network apparatus on the receiving side, and
the improvement processing unit:
in order to determine whether the transmission efficiency can be improved, calculates, using the estimated penalty, a limiting value of the first parameter needed in the network apparatus on the receiving side, in a case where the transmission scheme would be changed from the first transmission scheme to the second transmission scheme, and
when a value obtained by subtracting the limiting value of the first parameter from the actual measured value of the first parameter is greater than or equal to a predetermined value, determines that the transmission scheme can be changed from the first transmission scheme to the second transmission scheme and thereby determines that the transmission efficiency can be improved, and performs processing for changing the transmission scheme so that the transmission efficiency can be improved.