US 8,897,642 B2Granted

Remote node and network architecture and data transmission method for a fiber-optic network, especially for low bit-rate data transmission

AssigneeADVA Optical Networking SE

InventorsKlaus Grobe, Henning Hinderthur

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Abstract

The invention relates to a remote node architecture for a fiber-optic network, especially for low bit-rate data transmission, the fiber-optic network comprising a central node and a plurality of remote nodes serially connected to each other or to the central node, respectively, the central node and the remote node being capable of communicating by means of digital optical signals created by the central node or a respective remote node, each digital optical signal comprising a data frame.

Claims16

Dependent claims

A remote node architecture for a fiber-optic network, especially for low bit-rate data transmission, the fiber-optic network comprising a central node and a plurality of remote nodes serially connected to each other and to the central node, respectively, the central node and the plurality of remote nodes being capable of communicating by means of digital optical signals created by the central node or one of the plurality of remote nodes, each digital optical signal comprising a data frame,

(a) a first remote node of the plurality of remote nodes comprising an optical connection network, a single transceiver device comprising an optical receiver unit and an optical transmitter unit, and a controller device for controlling the transceiver device,
(b) the optical connection network defining a western optical connection port, an eastern optical connection port, an internal optical receiving port being connected to the optical receiver unit and an internal optical transmitting port being connected to the optical transmitter unit, the western and eastern optical connection ports being connected via an optical pass-through path for passing through a digital optical signal received at the western or eastern optical connection port as digital optical pass-through signal to the respective other optical connection port with at least a portion of an optical power of the received digital optical signal, and
(c) the controller device, the transceiver device and the optical connection network being configured such that
(i) for transmitting information from the first remote node to the central node, the controller device creates a first data frame including content data supplied to the controller device and address data for addressing the central node and controls the optical transmitter unit such that a digital optical transmit signal according to the data frame is created, the digital optical transmit signal being supplied at least to the optical connection port facing the central node,
(ii) for receiving information from the central node, the receiver unit receives a digital optical transmit signal created by the central node or a digital optical echo signal created by a second remote node of the plurality of remote nodes, which is supplied to the western or eastern optical connection port and which comprises a second data frame including content data and address data for addressing the second remote node, with at least a given power portion at the internal optical receiving port, and the controller device processes the second data frame, and
(iii) for regenerating a digital optical transmit or echo signal received, the receiver unit receives a digital optical transmit signal created by the central node or the first remote node or a digital optical echo signal created by the second remote node, which is supplied to the western or eastern optical connection port and which comprises a third data frame including content data and address data not addressing the first remote node, with at least a given power portion at the internal optical receiving port, the controller device creates an echo data frame including the same content and address data as the received third data frame and controls the optical transmitter unit such that an additional digital optical echo signal according to the echo data frame is created immediately or after a predetermined time interval after the end of the third data frame of the received optical signal, the additional digital optical echo signal being output at the respective other optical connection port or at both optical connection ports.

3 more elements

A fiber-optic network architecture, especially for a fiber-optic sensor network requiring low data transmission bit-rates, comprising:

(a) a central node including an optical connection port and a plurality of remote nodes, each remote node including a western and eastern optical connection port, the central node and the plurality of remote nodes connected in series to each other,
(b) the central node and each of the plurality of remote nodes being capable of communicating by means of digital optical signals created by the central node or one of the plurality of remote nodes, each digital optical signal comprising a data frame, wherein
(c) each of the remote nodes comprises:
an optical connection network, a single transceiver device comprising an optical receiver unit and an optical transmitter unit, and a controller device for controlling the transceiver device,
the optical connection network defining a western optical connection port, an eastern optical connection port, an internal optical receiving port being connected to the optical receiver unit and an internal optical transmitting port being connected to the optical transmitter unit, the western and eastern optical connection ports being connected via an optical pass-through path for passing through a digital optical signal received at the western or eastern optical connection port as digital optical pass-through signal to the respective other optical connection port with at least a portion of an optical power of the received digital optical signal, and
the controller device, the transceiver device and the optical connection network being configured such that
(i) for transmitting information from the a first remote node of the plurality of remote nodes to the central node, the controller device creates a first data frame including content data supplied to the controller device and address data for addressing the central node and controls the optical transmitter unit such that a digital optical transmit signal according to the data frame is created, the digital optical transmit signal being supplied at least to the optical connection port facing the central node,
(ii) for receiving information from the central node, the receiver unit receives a digital optical transmit signal created by the central node or a digital optical echo signal created by a second remote node of the plurality of remote nodes, which is supplied to the western or eastern optical connection port and which comprises a second data frame including content data and address data for addressing the second remote node, with at least a given power portion at the internal optical receiving port, and the controller device processes the second data frame, and
(iii) for regenerating a digital optical transmit or echo signal received, the receiver unit receives a digital optical transmit signal created by the central node or the first remote node or a digital optical echo signal created by the second remote node, which is supplied to the western or eastern optical connection port and which comprises a third data frame including content data and address data not addressing the first remote node, with at least a given power portion at the internal optical receiving port, the controller device creates an echo data frame including the same content and address data as the received third data frame and controls the optical transmitter unit such that an additional digital optical echo signal according to the echo data frame is created immediately or after a predetermined time interval after the end of the third data frame of the received optical signal, the additional digital optical echo signal being output at the respective other optical connection port or at both optical connection ports.

6 more elements

A method for transmitting digital data in a fiber-optic network, especially for low bit-rate data transmission, the network comprising a central and a plurality of remote nodes serially connected to each other and to the central node by means of a fiber-optic path, respectively, forming a fiber-optic bus structure, the method comprising the steps of:

(a) for transmitting information from a first selected remote node to the central node:
(i) creating, in the first selected remote node, a digital optical transmit signal addressed to the central node comprising a data frame and outputting the digital optical signal to the fiber-optic path at least in the direction to the central node,
(ii) passing the digital optical signal through each of the remote nodes in the path between the first selected remote node and the central node,
(iii) receiving, in at least one of the remote nodes in the path between the first selected remote node and the central node, the digital optical transmit signal and, as the case may be, one or more echo signals created by other remote nodes in the path between the first selected remote node and the at least one remote node,
(iv) creating, in the at least one remote node an echo signal comprising a data frame including the same information to be transmitted as the digital optical transmit signal or the echo signal received last based on the transmit signal and outputting the echo signal to the fiber-optic path at least in the direction to the central node, and
(v) receiving, at the central node, the transmit signal and the echo signal or the echo signal, only, and
(b) for transmitting information from the central node to a second selected remote node:
(i) creating, in the central node, a digital optical transmit signal addressed to the second selected remote node comprising a data frame and outputting the digital optical signal to the fiber-optic path at least in the direction to the second selected remote node,
(ii) passing the digital optical signal through each of the remote nodes in the path between the central node and the second selected remote node,
(iii) receiving, in at least one of the remote nodes in the path between the central node and the second selected remote node, the digital optical transmit signal and, as the case may be, one or more echo signals created by other remote nodes in the path between the central node and the at least one remote node,
(iv) creating, in the at least one remote node an echo signal comprising a data frame including the same information to be transmitted as the transmit signal or the echo signal received last based on the transmit signal and outputting the echo signal to the fiber-optic path at least in the direction to the at least one remote node, and
(v) receiving, at the central node, the transmit signal and the echo signal or the echo signal, only.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

(a) a first remote node of the plurality of remote nodes comprising an optical connection network, a single transceiver device comprising an optical receiver unit and an optical transmitter unit, and a controller device for controlling the transceiver device,
(b) the optical connection network defining a western optical connection port, an eastern optical connection port, an internal optical receiving port being connected to the optical receiver unit and an internal optical transmitting port being connected to the optical transmitter unit, the western and eastern optical connection ports being connected via an optical pass-through path for passing through a digital optical signal received at the western or eastern optical connection port as digital optical pass-through signal to the respective other optical connection port with at least a portion of an optical power of the received digital optical signal, and
(c) the controller device, the transceiver device and the optical connection network being configured such that
(i) for transmitting information from the first remote node to the central node, the controller device creates a first data frame including content data supplied to the controller device and address data for addressing the central node and controls the optical transmitter unit such that a digital optical transmit signal according to the data frame is created, the digital optical transmit signal being supplied at least to the optical connection port facing the central node,
(ii) for receiving information from the central node, the receiver unit receives a digital optical transmit signal created by the central node or a digital optical echo signal created by a second remote node of the plurality of remote nodes, which is supplied to the western or eastern optical connection port and which comprises a second data frame including content data and address data for addressing the second remote node, with at least a given power portion at the internal optical receiving port, and the controller device processes the second data frame, and
(iii) for regenerating a digital optical transmit or echo signal received, the receiver unit receives a digital optical transmit signal created by the central node or the first remote node or a digital optical echo signal created by the second remote node, which is supplied to the western or eastern optical connection port and which comprises a third data frame including content data and address data not addressing the first remote node, with at least a given power portion at the internal optical receiving port, the controller device creates an echo data frame including the same content and address data as the received third data frame and controls the optical transmitter unit such that an additional digital optical echo signal according to the echo data frame is created immediately or after a predetermined time interval after the end of the third data frame of the received optical signal, the additional digital optical echo signal being output at the respective other optical connection port or at both optical connection ports.

3 more elements