Monitoring multiple passive optical networks

Patent metadata

Field	Value
Publication number	US-11178472-B2
Application number	US-201916424678-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	Jun 8, 2018
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A PON system comprising multiple PONs, each having a respective intelligent splitter monitor (ISM). In addition to having a passive optical splitter therein, an ISM also has several remotely powered active components configured to monitor the presence of uplink light signals on the ports of the splitter and communicate with the central office using out-of-band optical signals. These ISM functionalities enable the network operator, e.g., to automatically map PON connectivity, pairing each port on the splitter with a distinct optical network unit. The PON system further comprises an optical module connected to the multiple PONs through an optical switch in a manner that supports shared access to said module by the corresponding multiple ISMs. In an example embodiment, the optical module comprises an optical transceiver capable of communicating with the ISM transceivers and one or more lasers configured to provide high-intensity light for remotely charging the ISM batteries.

First claim

What is claimed is:

1. An apparatus comprising:
a plurality of first optical data transceivers, each of the first optical data transceivers being connected to transmit and receive data-modulated light through a corresponding optical fiber;
an optical monitor comprising a laser configured to generate continuous-wave light and a second optical data transceiver; and
an optical cross-connect connecting each one of the first optical data transceivers to a corresponding one of first optical ports thereof, the corresponding optical fiber being external to the optical cross-connect and connected to said corresponding one of the first optical ports;
wherein the second optical data transceiver is optically connected to a second optical port of the optical cross-connect and the optical cross-connect is switchable to optically connect the second optical port to selected individual ones of the first optical ports; and
wherein the laser is optically connected to a third optical port of the optical cross-connect and the optical cross-connect is switchable to selectively optically connect the third optical port to selected single ones of the first optical ports.

2. The apparatus of claim 1 ,
wherein data-modulated light transmitted through the optical cross-connect by the second optical data transceiver has a first wavelength; and
wherein the second optical data transceiver is further configured to receive, through the optical cross-connect, data-modulated light having a second wavelength that is different from the first wavelength.

3. The apparatus of claim 2 ,
wherein the first optical data transceivers are configured to transmit and receive the data-modulated light using a plurality of wavelength channels; and
wherein the first and second wavelengths are out-of-band with respect to the wavelength channels.

4. The apparatus of claim 2 , wherein the continuous-wave light has a third wavelength different from the first and second wavelengths.

5. The apparatus of claim 1 , further comprising a plurality of passive optical networks, each one of the passive optical networks including a respective intelligent optical splitter configured to monitor at least some of the data-modulated light in said one of the passive optical networks.

6. The apparatus of claim 5 , wherein the respective intelligent optical splitter is configured to optically communicate with the second optical data transceiver.

7. The apparatus of claim 5 , wherein the respective intelligent optical splitter is configured to be powered using some of the continuous-wave light.

8. The apparatus of claim 5 , wherein the second optical data transceiver is configured to communicate with the respective intelligent optical splitters of two or more of the passive optical networks.

9. The apparatus of claim 5 , wherein each of the plurality of passive optical networks further includes a respective plurality of optical network units connected to communicate with a respective one of the first optical transceivers by way of the respective intelligent optical splitter.

10. The apparatus of claim 1 , wherein the optical cross-connect comprises a wavelength-selective switch, the second and third optical ports being optical ports of the wavelength-selective switch.

11. The apparatus of claim 1 , wherein the optical cross-connect is switchable such that the second optical port and the third optical port are not optically connected to a same one of the first optical ports at a same time.

12. The apparatus of claim 1 , wherein the optical cross-connect is switchable such that the second optical port and one of the first optical data transceivers are optically connected to a same one of the first optical ports.

13. The apparatus of claim 1 , wherein the optical cross-connect is switchable such that the third optical port and one of the first optical data transceivers are optically connected to a same one of the first optical ports.

14. An apparatus comprising:
a plurality of first optical data transceivers, each of the first optical data transceivers being connected to transmit and receive data-modulated light;
an optical monitor; and
an optical cross-connect configured to connect each of the first optical data transceivers to a corresponding optical fiber;
wherein the optical monitor is optically connected to the optical cross-connect, and the optical cross-connect is switchable to optically connect the optical monitor to selected individual ones of the optical fibers such that the optical monitor can transmit light to and receive light from the selected individual ones of the optical fibers;
wherein the optical cross-connect comprises:
a plurality of first optical ports, each of the first optical ports being externally connected to the corresponding optical fiber; and
a second optical port and a plurality of third optical ports;

wherein the optical monitor is optically connected to transmit and receive modulated optical signals through the second optical port, the optical cross-connect being switchable to selectively connect the second optical port to any one of the third optical ports;
wherein each of the third optical ports is connected to a respective one of the first optical ports by way of a respective wavelength multiplexer; and
wherein each of the respective wavelength multiplexers is further connected between a respective one of the first optical data transceivers and the respective first optical port to transmit the data-modulated light therebetween.

15. The apparatus of claim 14 ,
wherein the optical monitor is configured to transmit and receive light having wavelengths of a continuous spectral band; and
wherein the data-modulated light transmitted and received by each of the first optical data transceivers has wavelengths outside said spectral band.

16. The apparatus of claim 15 , wherein each of the respective wavelength multiplexers includes the respective first optical port, a respective fourth optical port, and a respective fifth optical port and is configured to:
route the wavelengths of said spectral band between the respective first optical port and the respective fifth optical port; and
route the wavelengths outside said spectral band between the respective first optical port and the respective fourth optical port.

Assignees

• Nokia Solutions & Networks Oy

Inventors

• Iannone Patrick
• Straub Michael
• Pfeiffer Thomas
• Hehmann Joerg

Classifications

• H04Q2011/0016

  using wavelength multiplexing or demultiplexing · CPC title

• H04Q11/0005 Primary

  Switch and router aspects · CPC title

• H04B10/691

  Arrangements for optimizing the photodetector in the receiver · CPC title

• H04B10/40

  Transceivers · CPC title

• H04Q2011/0015

  using splitting combining · CPC title