US 2016/0112136 A1Published application

Optical device, optical distribution network and respective methods performed thereby

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorPatryk URBAN

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Abstract

An optical device, OD, for partitioning a received signal and outputting the partitions via two outputs. An optical distribution network comprising at least two Optical Network Terminations, ONTs, the ONTs being connected to the CO by the fibre ring structure, wherein each ONT is connected to the fibre ring structure by means of a respective OD is provided. The OD has a first port, a second port and a third port, each port being operable as both an input and an output interface. The first and second ports are adapted to receive an input signal, to split the signal and to output a first respective portion of the received signal through the second or first port respectively and to output a respective second portion of the received signal through the third port, the first portion of the received signal being larger than the second portion of the received signal.

Claims27

Dependent claims

An optical device comprising:

a first port;
a second port;
and
a third port, wherein each port being operable as both an input and an output interface, and wherein:
the first port is adapted to receive a first input signal, to split the first input signal and to output a first portion, A, of the received first input signal through the second port and to output a second portion, B, of the received first input signal through the third port, wherein the first portion, A, of the received first input signal is larger than the second portion, B, of the received first input signal;
the second port is adapted to receive a second input signal, to split the received second input signal and to output a first portion, C, of the received second input signal through the first port and to output a second portion, D, of the received second input signal through the third port, wherein the first portion, C, of the received second input signal is larger than the second portion, D, of the received second input signal;
and
the third port is adapted to receive a third input signal, to split the third input signal and to output a first portion, E, of the received third input signal through the first port and to output a second portion, F, of the received third input signal through the second port.

5 more elements

An optical distribution network comprising a Central Office (CO) connected to a fibre ring structure and at least two Optical Network Terminations (ONTs), the ONTs being connected to the CO by the fibre ring structure, wherein each ONT is connected to the fibre ring structure by means of a respective optical device, wherein the CO is adapted to transmit a signal to the ONTs in either direction of the fibre ring structure, wherein the optical devices are adapted to receive the signal from the CO, to direct a fraction of the signal to a respective ONT and to direct a remaining portion of the signal to the ring structure.

A method performed by an optical device having a first, a second and a third port, each port being operable as both an input and an output interface, the method comprising:

receiving an input signal on one of the three ports;
splitting the received input signal into two portions:
and
transmitting each of the respective two portions of the received input signal on the other two ports, and wherein:
when the input signal is received on the first port, the method comprises splitting the received input signal and outputting a first portion, A, of the received input signal through the second port and outputting a second portion, B, of the received input signal through the third port, wherein the first portion A of the received input signal is larger than the second portion B of the received input signal;
when the input signal is received on the second port, the method comprises splitting the received input signal and outputting a first portion, C, of the received input signal through the first port and outputting a second portion, D, of the received input signal through the third port, wherein the first portion C of the received input signal is larger than the second portion D of the received input signal;
and
when the input signal is received on the third port, the method comprises splitting the received input signal and outputting a first portion, E, of the received input signal to the first port and outputting a second portion, F, of the received input signal to the second port.

5 more elements

A method performed by an optical distribution network comprising a Central Office (CO) connected to a fibre ring structure and at least two Optical Network Terminations (ONTs), the ONTs being connected to the CO by the fibre ring structure, wherein each ONT is connected to the fibre ring structure by means of a respective optical device, the method comprising the CO transmitting a signal to the ONTs in either direction of the fibre ring structure, the optical devices respectively receiving the signal from the CO, directing a fraction of the received signal to a respective ONT and directing a remaining portion of the signal to the ring structure.

Dependencies are inferred from the claim text.