Method and apparatus for matching fiber connections for ROADM service

• US 10,666,377 B2
• Filed: 12/19/2018
• Issued: 05/26/2020
• Est. Priority Date: 09/14/2018
• Status: Active Grant

• Current Assignee: Accelink Technologies Company Limited
• Original Assignee: Accelink Technologies Company Limited
• Inventors: Yu, Jiekui, Zhang, Ying, Liu, Zhaoxia, Xu, Jian
• Primary Examiner(s): Lee, Jai M
• Application Number:
  US16/226,591
• Publication Number:
  US 20200092027A1
• Time in Patent Office: 524 Days
• Field of Search: None
• CPC Class Codes: H04B 10/07 Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
• CPC Class Codes: H04J 14/0205 Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
• CPC Class Codes: H04J 14/0212 using optical switches or wavelength selective switches [WSS]
• CPC Class Codes: H04J 14/0217 Multi-degree architectures, e.g. having a connection degree greater than two
• CPC Class Codes: H04J 14/0264 Multiplex identification or labelling
• CPC Class Codes: H04J 14/0272 Transmission of OAMP information
• CPC Class Codes: H04Q 2011/0083 Testing; Monitoring

Abstract

The present disclosure relates to a technical field of optical communication, and more particularly to a device and method for matching optical fiber connections for ROADM service side, wherein the device comprises a reference control optical channel transmitter, a downlink WSS, a plurality of emitting ports, a reference control optical channel receiver, an uplink WSS and a plurality of receiving ports; the reference control optical channel transmitter emitting a reference control optical channel signal, and the downlink WSS emitting the reference control optical channel through the respective emitting ports in a polling manner; the reference control optical channel receiver receiving the reference control optical channel signal, and the uplink WSS selectively receiving the reference control optical channel over the plurality of receiving ports in the polling manner; wherein the reference control optical channel operating within an operating wavelength range of WSSs in the ROADM but outside a wavelength range of a service optical channel. By using WSS to control polling of the reference control optical channel among service side ports of ROADM, the present disclosure realizes an auto-routing matching of an optical fiber connection between different service side ports of ROADM and improves configuration efficiency, and at the same time, also realize to monitor performance of the optical fiber connection between service side ports of ROADMs in different directions and be a standby physical channel for chassis cascade.

Claims

1. A device for matching optical fiber connections for ROADM service, characterized in comprising:

a reference control optical channel transmitter (1), a downlink Wavelength Selective Switch (WSS) (2), a plurality of emitting ports, a reference control optical channel receiver (3), an uplink WSS (4) and a plurality of receiving ports;

the reference control optical channel transmitter (1) emitting a first reference control optical channel signal, and the downlink WSS (2) emitting the first reference control optical channel through the respective emitting ports in a polling manner;

the reference control optical channel receiver (3) receiving a second reference control optical channel signal from another matching device, and the uplink WSS (4) selectively receiving the second reference control optical channel over the plurality of receiving ports in the polling manner;

wherein the reference control optical channels operating within an operating wavelength range of WSSs in the ROADM but outside a wavelength range of a service optical channel,

wherein the matching device and the another matching device are located in different chassis and duplex-connected with each other, the reference control optical channels further operate as a backup physical channel for a cascade communication channel between the different chassis for carrying cascade interactive services.

2. The device for matching optical fiber connections for ROADM service of claim 1, characterized in further comprising a combiner (5), the combiner (5) being located between the reference control optical channel transmitter (1) and the downlink WSS (2), and the combiner (5) operating to multiplex a downlink service signal of the ROADM with the first reference control optical channel signal and inject them into the downlink WSS (2).

3. The device for matching optical fiber connections for ROADM service of claim 1, characterized in further comprising a wavelength separator (6), the wave separator (6) being located between the uplink WSS (4) and the reference control optical channel receiver (3), and the wave separator (6) operating to separate the second reference control optical channel signal from the uplink service optical signal of the ROADM.

4. A method for matching optical fiber connections for ROADM service side, characterized in that a reference control optical channel is used in the ROADM service, the reference control optical channel operating within an operating wavelength range of WSS in the ROADM but outside a wavelength range of a service optical channel;

an uplink WSS, a downlink WSS, a plurality of emitting ports and a plurality of receiving ports being provided in the ROADM, and the method comprises;

on an emitting side of the reference control optical channel in a first ROADM, emitting, by the downlink WSS, a reference control optical channel signal through the respective emitting ports in a polling manner;

on a receiving side of the reference control optical channel in a second ROADM, receiving, by the uplink WSS, the reference control optical channel over the respective receiving ports in the polling manner, when any receiving port of the second ROADM receives the reference control optical channel signal from a certain emitting port of the first ROADM, establishing a matching relationship between the receiving port of the second ROADM and the certain emitting port of the first ROADM connected by an optical fiber,

wherein the first ROADM and the second ROADM are located in different chassis and duplex-connected with each other, the reference control optical channel further operates as a backup physical channel for a cascade communication channel between the different chassis for carrying cascade interactive services.

5. The method for matching optical fiber connections for ROADM service side of claim 4, characterized in that on the emitting side of the reference control optical channel in the first ROADM, the reference control optical channel signal emitted through the respective emitting ports carries ROADM card information and corresponding emitting port information.

6. The method for matching optical fiber connections for ROADM service side of claim 5, characterized in that on the emitting side of the reference control optical channel in the first ROADM, emitting, by the downlink WSS, a reference control optical channel signal through the respective emitting ports in a polling manner, further comprises:

determining a current emitting port by polling by the downlink WSS, emitting the reference control optical channel signal which carries the ROADM card information and the current emitting port information from the determined current emitting port by a reference control optical channel transmitter, thereby transmitting the carried information;

wherein when a downlink service optical signal and the reference control optical channel signal exist simultaneously, the downlink service signal is injected into the downlink WSS together with the reference control optical channel signal, and is emitted out from the corresponding emitting port.

7. The method for matching optical fiber connections for ROADM service side of claim 5, characterized in that when any receiving port of the second ROADM receives the reference control optical channel signal from a certain emitting port of the first ROADM, establishing a matching relationship between the receiving port of the second ROADM and the certain emitting port of the first ROADM connected by an optical fiber, further comprises:

determining a current receiving port in the second ROADM through polling the respective receiving ports by the uplink WSS;

when a reference control optical channel receiver receives, through the current receiving port of the second ROADM, the reference control optical channel signal emitted from an emitting port of the first ROADM in any other direction, analyzing the carried information of the received reference control optical channel signal; and

through analyzing the carried information, determining the first ROADM and corresponding emitting port that emits the reference control optical channel signal, establishing a matching relationship between the current receiving port of the second ROADM and the corresponding emitting port of the first ROADM connected by an optical fiber, and generating configuration information of the connecting optical fiber for the two ports.

8. The method for matching optical fiber connections for ROADM service side of claim 7, characterized in that the reference control optical channel receiver receiving, through the current receiving port of the second ROADM, the reference control optical channel signal emitted from an emitting port of the first ROADM in any other direction further comprises:

a combined optical signal of an uplink service signal of the second ROADM and the reference control optical channel signal entering into the uplink WSS through the current receiving port, and after being separated, injecting the reference control optical channel signal into the reference control optical channel receiver of the second ROADM.

9. The method for matching optical fiber connections for ROADM service side of claim 4, characterized in that the reference control optical channel signal emitted by the reference control optical channel transmitter through the respective emitting port of the first ROADM carries transmitting optical power information, and the method further comprises, after the connection relationship is established between an emitting port x of the first ROADM in a direction X and a receiving port y of the second ROADM in a direction Y:

the reference control optical channel receiver of the second Y-direction ROADM detecting received optical power, analyzing and obtaining the transmitting optical power information emitted by the reference control optical channel transmitter of the first X-direction ROADM through the emitting port x, and calculating an insertion loss on the corresponding link;

retrieving an insertion loss from the reference control optical channel transmitter of the first X-direction ROADM to the emitting port x and an insertion loss from the receiving port y to the reference control optical channel receiver of the second Y-direction ROADM calibrated and stored in the ROADM cards in advance;

calculating, from the above data, an insertion loss of the physical optical fiber connection between the emission port x of the first X-direction ROADM and the receiving port y of the second Y-direction ROADM.