US 12,170,539 B2
Optical network system, optical node device, and optical network control method
Tomoyuki Hino, Tokyo (JP); Akio Tajima, Tokyo (JP); Hitoshi Takeshita, Tokyo (JP); and Shinsuke Fujisawa, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC Corporation, Tokyo (JP)
Filed on Apr. 18, 2023, as Appl. No. 18/136,026.
Application 18/136,026 is a continuation of application No. 17/519,717, filed on Nov. 5, 2021, granted, now 11,652,546.
Application 17/519,717 is a continuation of application No. 16/903,691, filed on Jun. 17, 2020, granted, now 11,201,668, issued on Dec. 14, 2021.
Application 16/903,691 is a continuation of application No. 15/559,899, granted, now 10,715,249, issued on Jul. 14, 2020, previously published as PCT/JP2016/001587, filed on Mar. 18, 2016.
Claims priority of application No. 2015-065717 (JP), filed on Mar. 27, 2015.
Prior Publication US 2023/0254036 A1, Aug. 10, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/079 (2013.01); H04J 14/02 (2006.01)
CPC H04B 10/0795 (2013.01) [H04B 10/0793 (2013.01); H04J 14/0213 (2013.01); H04J 14/0227 (2013.01); H04J 14/0256 (2013.01); H04J 14/0257 (2013.01); H04J 14/0263 (2013.01); H04B 2201/70703 (2013.01); H04J 2203/0069 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An optical network management device, comprising:
a receiver configured to receive a notice of data variation in a client signal on a network; and
a controller configured to perform a control to decrease a fragmentation of unused part of an optical subcarrier on the network,
wherein the controller is configured to
change, depending on the data variation having been received, an active optical subcarrier, which is the optical subcarrier to be used for transmitting the client signal, synchronously between an optical transmitting node and an optical receiving node,
map the client signal onto the active optical subcarrier having been changed, synchronously between the optical transmitting node and the optical receiving node, and
perform synchronously a changing process of the active optical subcarrier and a mapping process of the client signal,
wherein the controller is configured to perform
a first control to select a change candidate optical subcarrier whose operation to be stopped from among the active optical subcarrier,
a second control to set a wavelength of a changed optical subcarrier that becomes the active optical subcarrier due to a change, and
a third control to change the active optical subcarrier, based on respective results of the first control and the second control,
wherein the controller is configured to select an optical subcarrier with a maximum number of consecutive unused optical subcarriers in an adjacent link in an identical wavelength band as the change candidate optical subcarrier from the optical subcarrier, and
wherein the controller is configured to select an optical subcarrier with a maximum number of unused optical subcarriers as the change candidate optical subcarrier from optical subcarriers in an adjacent wavelength band when number of the consecutive unused optical subcarriers is equal.