US 12,119,867 B2
Transmission apparatus and transmission method
Kei Kitamura, Musashino (JP); Fumikazu Inuzuka, Musashino (JP); Kengo Shintaku, Musashino (JP); Takuya Oda, Musashino (JP); Takafumi Tanaka, Musashino (JP); and Masahito Tomizawa, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/632,589
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Aug. 5, 2019, PCT No. PCT/JP2019/030680
§ 371(c)(1), (2) Date Feb. 3, 2022,
PCT Pub. No. WO2021/024346, PCT Pub. Date Feb. 11, 2021.
Prior Publication US 2022/0321210 A1, Oct. 6, 2022
Int. Cl. H04B 10/032 (2013.01); H04B 10/079 (2013.01)
CPC H04B 10/032 (2013.01) [H04B 10/0795 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A transmission apparatus comprising:
a resource for an active system path;
a resource for a standby system path;
a controller configured to carry out processing to secure the resource for the standby system path in response to detection of a sign of failure in the active system path; and
a switch configured to connect a transmission path for a main signal to the resource for the active system path or the resource for the standby system path;
wherein, the resource for the active system path is an active system communicator,
the resource for the standby system path is a standby system communicator,
the resource for the standby system path is shared among a plurality of active system paths,
the number of resources for the active system path is more than the number of resources for the standby system path, and
the switch connects some of the active system paths and the resource for the standby system path, so that a duplicated main signal is transmitted to the standby system path from the active system path with the detected sign of failure,
a failure sign source information is used to detect the sign of failure, and
the failure sign source information includes at least one of:
first information indicating a warning occurring in the transmission apparatus, and
second information being about a processing performed, by an operator of a communication system, based on a network operation policy, and
upon detecting the sign of failure, a delay adjuster configured to adjust delay difference in the active system path and the standby system path substantially to zero, and after the delay difference is reduced to zero, when the sign of failure is still detected, switching between the active system path and the standby system path is performed.