CN113572531A

CN113572531A - Optical interconnection system

Info

Publication number: CN113572531A
Application number: CN202010357437.6A
Authority: CN
Inventors: 尚迎春; 叶兵
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-10-29
Also published as: WO2021219085A1

Abstract

The present application provides an optical interconnect system. The optical interconnect system includes: an optical interconnect and at least one veneer; the optical interconnect device includes: at least one junction box; each of the junction boxes contains at least one junction module therein; each of the connection modules is connected to a connector on a corresponding one of the connection boxes; each of said veneers is optically connected to at least one connector in at least one of said junction boxes. This embodiment is through disassembling the light backplate into at least one connecting box, and every connecting box is disassembled into at least one connection module, greatly reduced the preparation degree of difficulty and the cost of light backplate.

Description

Optical interconnection system

Technical Field

The present application relates to communications, and more particularly, to an optical interconnection system.

Background

With the increasing demand for interconnection of everything, the development of the internet is more and more rapid, and a large amount of traffic is instantly transferred between different sites, which puts higher and higher demands on the switching capacity of the switching devices in the network. And along with the electric signal that electric backplate speed promoted and brought, under the condition that the normal sub-frame internal connection can not be realized to too big insertion loss during the internal transmission of exchange equipment, optical backplane or optical interconnection has become a must selection.

In the existing optical backplane scheme, a large optical backplane is used to connect multiple single boards on a device, so as to realize optical connection between the multiple single boards. However, the optical backplane has many problems, for example, thousands of optical paths on the optical backplane require very complicated connection methods and manufacturing difficulties, which further results in high cost and long manufacturing time.

Disclosure of Invention

The embodiment of the application provides an optical interconnection system, which simplifies the manufacturing difficulty of an optical back plate and reduces the cost.

An embodiment of the present application provides an optical interconnection system, including: an optical interconnect and at least one veneer; the optical interconnect device includes: at least one junction box; each of the junction boxes contains at least one junction module therein; each of the connection modules is connected to a connector on a corresponding one of the connection boxes;

each of said veneers is optically connected to at least one connector in at least one of said junction boxes.

In one embodiment, each of the connection modules is connected to a connector on a corresponding connection box, including:

each of the connection modules is connected to a connector on a corresponding connection box through an optical fiber;

alternatively, the connector of each of the connection modules serves as a connector on the corresponding connection box.

Drawings

FIG. 1 is a block diagram of an optical interconnect system in accordance with an embodiment of the present disclosure;

FIG. 2 is an internal schematic view of an optical interconnect device provided by an embodiment of the present application;

fig. 3 is an internal connection diagram of a connection module according to an embodiment of the present application;

FIG. 4 is a diagram illustrating an example of an optical interconnect system according to an embodiment of the present application;

fig. 5 is an exemplary diagram of an optical interconnection system applied in a switching device according to an embodiment of the present application;

fig. 6 is an exemplary diagram of an optical interconnection system applied in a ROADM according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, embodiments of the present application will be described with reference to the drawings. The present application is described below with reference to the accompanying drawings of embodiments, which are provided for illustration only and are not intended to limit the scope of the present application.

Fig. 1 is a block diagram of an optical interconnection system provided in the present application. As shown in fig. 1, the optical interconnection system in the present embodiment includes: an optical interconnect device 10 and at least one single board 20; the optical interconnect device 10 includes: at least one connection box 101; each junction box 101 contains at least one junction module 1011 therein; each connection module 1011 is connected to at least one connector 1012 on a corresponding connection box 101; each veneer 20 is optically connected to at least one connector 1012 in at least one junction box 101.

In fig. 1, the optical interconnection system includes: an optical interconnect device 10 and a single board 20, and the optical interconnect device 10 includes: the structure of the optical interconnection system will be described by taking as an example a junction box 101, each junction box 101 comprising two junction modules 1011.

In an embodiment, at least one connection box is included in the optical interconnection system, each connection box containing at least one connection module therein, and each connection box including two kinds of ports. Illustratively, there are two categories of a-port and B-port on each connection box. Meanwhile, the optical interconnection system also comprises at least one single board. In an embodiment, each single board is optically connected (either by optical fiber or directly) to at least one connector in each junction box to achieve the effect of optical interconnection. In this embodiment, the optical backplane is disassembled into at least one connection box, and one connection box is disassembled into at least one connection module, so that optical interconnection between each veneer and at least one connector in each connection box is realized, and a complex optical backplane is connected through the combination of a plurality of simple connection modules, thereby greatly reducing the manufacturing difficulty and cost of the optical backplane.

In an embodiment, a connector on a connection box refers to a port of the connection box. In one embodiment, each connection module is connected to a connector on a corresponding connection box, comprising: each connection module is connected to a connector on a corresponding connection box through an optical fiber; alternatively, the connectors of each connection module act as connectors on the corresponding connection box.

In one embodiment, each veneer is optically connected to at least one connector in at least one junction box, comprising: each single board is optically connected with at least one connector in at least one connecting box through an optical fiber or an optical fiber ribbon under the condition of meeting the preset interweaving connection relationship. The preset interleaving connection relation means that at least 1 connection is kept between two ports of a single board.

In an embodiment, in a case that the optical interconnection system includes two single boards, the presetting of the interleaving connection relationship includes: each first port on each first veneer is optically connected with at least one first port on at least one connecting box; each second port on each second board is optically connected to at least one second port on at least one junction box. The interface on the first single board is an a port, the interface on the second single board is a B port, and the a port and the B port can be connected to the connection box through optical fibers or optical fiber ribbons. Exemplarily, in an embodiment, the first board is a line card (LineCard, LC) board; the second board is a Switch Card (SC) board. In an embodiment, in the case that the optical interconnection system includes two single boards, the first port is an LC port; the second port is an SC port. The preset interleaving connection relationship means that at least 1 connection is maintained between the whole formed by all the ports of each LC single board and the whole formed by all the ports of each SC single board.

In the embodiment, in the case that the optical interconnection system includes two kinds of boards, the board may be an LC board or an SC board, that is, in the case that the first board is an LC board, the second board is an SC board; correspondingly, when the first board is an SC board, the second board is an LC board. In this embodiment, a connection relationship between a board and an upper port of a connection box is described by taking an example in which a first board is an LC board and a second board is an SC board. In an embodiment, the first board is an LC board, the second board is an SC board, and the first port on the connection box is an LC port and the second port is an SC port. That is, the LC port on the LC single board is connected to the LC port on the connection box, and the SC port on the SC single board is connected to the SC port on the connection box.

In an embodiment, in a case that the optical interconnection system includes a single board, the presetting of the interleaving connection relationship includes: each third port on each veneer is optically connected with at least one third port on at least one connection box; each fourth port on each board is optically connected to at least one fourth port on at least one junction box. In one embodiment, where the optical interconnection system comprises a single board of wavelength division multiplexing demultiplexing, the third port is a wavelength division demultiplexer (DeM) port; the fourth port is a wavelength division multiplexer (Mux) port. In an embodiment, in a case that the optical interconnection system includes a single board, the first single board and the second single board are merged on the same single board. Each merged veneer comprises a third port and a fourth port. Correspondingly, each connection box comprises a plurality of third ports and a plurality of fourth ports. Illustratively, the connection relationship between the single board and the ports on the connection box is described by taking the third port as DeM port and the fourth port as Mux port as an example. In an embodiment, all DeM ports on each board connect with DeM ports on the junction box, and all Mux ports on each board connect with Mux ports on the junction box. The preset interleaving connection relationship means that at least 1 connection is maintained between the whole formed by all the Mux ports on each board and the whole formed by all the DeM ports on each board.

In one embodiment, the connection module comprises one of: a fiber-optic flexible board; an optical waveguide plate; a Printed Circuit Board (PCB); a cable plate.

Fig. 2 is an internal schematic diagram of an optical interconnection apparatus according to an embodiment of the present application. As shown in FIG. 2, n connection boxes are included in the optical interconnection device, and n is more than or equal to 1; each connecting box comprises m connecting modules, wherein m is more than or equal to 1; each connection module is connected to a connector on a corresponding connection box. Each connection module can be connected to the connector on the corresponding connection box through optical fibers, and can also be directly used as the connector of the connection box through the connector of the connection module. Illustratively, the junction box 1 includes therein a junction module 1, a junction module 2 … … junction module m, each of which is connected to a connector on the junction box 1. In an embodiment, a connector on a junction box refers to a port on the junction box; the connectors on the connection module refer to ports on the connection module.

Fig. 3 is an internal connection diagram of a connection module according to an embodiment of the present application. As shown in fig. 3, each connection module may include two types of connectors, for example, the connection module may be internally divided into connectors a and B. Wherein, the total number of the connectors A is 1-a, the total number of the connectors B is 1-B, a is more than or equal to 1, and B is more than or equal to 1. There is at least one optical connection from each connector a to each connector B. In one embodiment, connector a and connector B may be combined on a single connector. That is, the distribution of the connectors a and B in the connection module may be arbitrarily set, and this is not particularly limited. And one connection box comprises at least one connection module, and the connection relationship between each connection module and all connectors on each connection box can be through optical fiber connection, or the connection ports (i.e. the ports in the above embodiments) of the connection modules can be directly used as the connectors on the connection box.

Fig. 4 is a diagram of an application example of an optical interconnection system according to an embodiment of the present application. As shown in FIG. 4, assume that in one device interior, there are n connection boxes (connection box 1, connection box 2 … … connection box n) and k boards (board 1, board 2 … … board k), where n ≧ 1 and k ≧ 1. Including connector a and connector B in each connection and pair. In an embodiment, each single board and each connection box may be connected by an optical fiber or an optical fiber ribbon or the like. In one embodiment, the single board can be divided into two types: a board C and a board D, such that all connectors on both boards are connected to the connector a and the connector B on each junction box, respectively. In one embodiment, if there is only one board on the device, i.e. board C and board D are combined on one board, then this combined board is connected to both connector a and connector B of each junction box.

In an implementation manner, taking 4 connection boxes included in the switching device and 4 connection modules included in each connection box as an example, a connection process of all connectors in a single board and the connection boxes is described. Fig. 5 is an exemplary diagram of an optical interconnection system applied in a switching device according to an embodiment of the present application. As shown in fig. 5, it is assumed that 4 connection blocks (connection block 1, connection block 2, connection block 3, and connection block 4) are included in the exchange device, and 4 connection modules are provided on each connection block. Each connecting module comprises 16LC ports and 16SC ports, each LC port and each SC port are 16-core optical connectors, namely, each connecting box has 1-64 LC ports and 1-64 SC ports, and each LC port and SC port are 16-core optical connectors. Illustratively, 1-16 LC and 1-16 SC are on the same connecting module (i.e. on the first connecting module on the connecting box 1, 2, 3 or 4), and 1 optical path is arranged between each LC port and each SC port; 17-32 LC and 17-32 SC are on the same connecting module (namely on the second connecting module on the connecting box 1, 2, 3 or 4), and 1 optical path is arranged between each LC port and each SC port; and so on.

In the embodiment, it is assumed that there are two kinds of single boards on one switching device, for example, the single board C is an LC board, and the single board D is an SC board. In this embodiment, the switching device has 64 LC panels, each of which has 1 framing deframer (Framer), and outputs 32 transceiver pairs (i.e., 64 signals for 32 transceivers and 32 transceivers). Each LC panel outputs 4 ports of 16 cores, with 4 boxes of diagonal lines on the LC panel as shown in fig. 5. There are 4 connection signals (i.e. 2 receive and 2 transmit) between each LC panel and each SC panel.

In an embodiment, there are 16SC boards on the switching device. Each SC board has 1 switching chip (SF), and outputs 128 transceiver pairs. Each SC plate outputs 16 ports of 16 cores, as shown by the 16 gray boxes on the SC plate in fig. 5.

On the connection of each single board and each connection box, the j ═ 1,16 ports on the SC board i ═ 1,16] are connected to the SC ports of the j { [ (j-1)/4] remainder } × 16+ i on the connection box of [ (j-1)/4] integer part + 1; the n-th [1,4] ports of the LC panel m-1, 64 are connected to the m-th [1,64] LC ports of the junction box n-1, 4. Wherein i ═ 1,16 represents any number of i 1 and 2 … … 16; j ═ 1,16] indicates that j is any one of 1 and 2 … … 16; m ═ 1,64 represents that m is any one of 1 and 2 … … 64; n ═ 1,4 denotes that n is any one of 1 and 2 … … 4.

Through the above-mentioned interleaving connection, it is possible to implement that the LC port of each LC single board is connected to the LC port of at least one connection box, and the SC port of each SC board is connected to the SC port of at least one connection box, that is, it is possible to implement that 4 optical paths are connected to the ports of all SC single boards in the port of each LC single board.

In an implementation manner, a connection process of all connectors in a single board and a connection box is described by taking an example that a Reconfigurable Optical Add-Drop Multiplexer (ROADM) includes 3 connection boxes, and each connection box includes 3 connection modules. Fig. 6 is an exemplary diagram of an optical interconnection system applied in a ROADM according to an embodiment of the present disclosure. As shown in fig. 6, it is assumed that 3 connection boxes (connection box 1, connection box 2, connection box 3) are included in the ROADM, and each connection box has 3 connection modules. Each connecting module comprises 24Mux ports (namely, oblique line boxes) and 24DeM ports (namely, gray boxes) outwards, each Mux port and each DeM port are 24-core optical connectors, namely, each connecting box has 1-72 Mux ports and 1-72 DeM ports in total, and each port is a 24-core optical connector. Wherein, 1-24 Mux and 1-24 DeM are on the same connecting module (namely on the first connecting module on the connecting box 1, 2 or 3), and 1 optical path is arranged between each Mux port and each DeM port; 25-48 Mux and 25-48 DeM are on the same connection module (i.e. on the second connection module on the connection box 1, 2 or 3), and 1 optical path is arranged between each Mux port and each DeM port; and so on.

In a ROADM device, there is a single board, i.e. the single board C and the single board D are merged on the same single board. In an embodiment, the ROADM device has 72 boards, each board containing 3 DeM connectors (e.g., the gray boxes in fig. 6) and 3 Mux connectors (e.g., the diagonal boxes in fig. 6), each connector being a 24-core optical connector.

On each single board to each junction box connection, the gray box on the single board i ═ 1,72 (i.e. DeM ports) the jth ═ 1,3 ports are connected to the gray box on the junction box of the [ (i-1)/24] integer part +1, at 24 × (j-1) + [ (i-1)/24] remainder part + 1; the slant line block port (i.e. Mux port) on the single board i ═ 1,72] is connected to the ith ═ 1,72] slant line block port of the first connection box j ═ 1, 3. In the embodiment, i ═ 1,72 represents any number of i 1 and 2 … … 72; j ═ 1,3 indicates that j is any one of 1, 2, and 3.

Through the above-mentioned interleaving connection, it is possible to implement connection between the DeM core of each board and the DeM port on each connection box, and connection between the Mux core on each board and the Mux port on each connection box, that is, there is an optical path connection between each board and each connection box.

In the above embodiments, the connection module distinguishes two ports in two rows, which does not mean that the two ports are arranged up and down in reality, and they may be on the same row on the same side of the connection module, or may be distributed on two sides of the connection module, or in other distribution forms.

In one embodiment, the connection module may be a fiber optic flex board, an optical waveguide board, or the like.

In one embodiment, the optical connection may also be an electrical connection, the optical fiber is changed into a cable, and the connection module may be a PCB board or a cable board, etc.

In the embodiment, the interconnection device in the embodiment overcomes the problems of difficulty in implementation, high cost and the like of the existing optical backplane, greatly simplifies the manufacturing difficulty of the optical backplane, and reduces the cost.

The foregoing is merely an exemplary embodiment of the present application and it is to be understood that the scope of the invention is not limited to such statements and embodiments. Modifications and variations that may occur to those skilled in the art without the benefit of this disclosure are considered to be within the scope of this patent.

The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the drawings and the following claims without departing from the scope of the invention. Accordingly, the proper scope of the application is to be determined according to the claims.

Claims

1. An optical interconnect system, comprising: an optical interconnect and at least one veneer; the optical interconnect device includes: at least one junction box; each of the junction boxes contains at least one junction module therein; each of the connection modules is connected to a connector on a corresponding one of the connection boxes;

2. The optical interconnection system of claim 1, wherein each of the connection modules is connected to a connector on a corresponding connection box, comprising:

3. The optical interconnection system of claim 1, wherein each of the boards is optically connected to at least one connector in at least one of the junction boxes, comprising:

and each single board is optically connected with at least one connector in at least one connection box through an optical fiber or an optical fiber ribbon under the condition of meeting the preset interweaving connection relationship.

4. The optical interconnection system according to claim 3, wherein, in a case where the optical interconnection system includes two single boards, the preset interleaving connection relationship includes: each first port on each first board is optically connected with at least one first port on at least one connection box;

each second port on each second board is optically connected to at least one second port on at least one of the junction boxes.

5. The optical interconnection system according to claim 3, wherein, in a case where the optical interconnection system includes a single board, the predetermined interleaving connection relationship includes: each third port on each said board is optically connected to at least one third port on at least one said junction box;

each fourth port on each said board is optically connected to at least one fourth port on at least one said junction box.

6. The optical interconnection system according to claim 4, wherein the first board is a line card LC board; the second single board is an exchange card SC single board.

7. The optical interconnection system according to claim 6, wherein in a case where the optical interconnection system includes two single boards, the first port is an LC port; the second port is an SC port.

8. The optical interconnection system of claim 5, wherein, in the case where the optical interconnection system comprises a single board, the third port is a wavelength division multiplexer DeM port; the fourth port is a multiplexer Mux port.

9. The optical interconnect system of claim 1, wherein the connection module comprises one of: a fiber-optic flexible board; an optical waveguide plate; a PCB board; a cable plate.

10. The optical interconnection system of claim 1, wherein the connectors on the junction box are each ports on the junction box.