An optical interconnection system

Abstract

The present application proposes an optical interconnection system. The optical interconnection system includes: an optical interconnection device and at least one single board; the optical interconnection device includes: at least one connection box; each of the connection boxes includes at least one connection module; each of the connection modules is connected to a connector on the corresponding connection box; each of the single boards is optically connected to at least one connector in at least one of the connection boxes. This embodiment greatly reduces the difficulty and cost of manufacturing the optical backplane by disassembling the optical backplane into at least one connection box, and each connection box is disassembled into at least one connection module.

Description

Technical Field

[0001] The present application relates to communications, and in particular to an optical interconnection system. Background Art

[0002] As the demand for the Internet of Everything becomes stronger and stronger, the Internet develops more and more rapidly, and a large number of services are transmitted instantly between different sites, which puts higher and higher requirements on the switching capacity of switching equipment in the network. As the electrical signal brought by the increase in the speed of the electrical backplane is too large to achieve normal internal connection of the sub-rack when the insertion loss is too large during transmission within the switching equipment, optical backplane or optical interconnection has become an inevitable choice.

[0003] In the existing optical backplane solution, a large optical backplane is used to connect multiple boards on the device to achieve optical connection between multiple boards. However, this method brings many problems to the optical backplane, such as thousands of optical paths on the optical backplane require very complex connection methods and manufacturing difficulties, which in turn leads to high costs and long manufacturing time. Summary of the invention

[0004] The embodiment of the present application provides an optical interconnection system, which simplifies the manufacturing difficulty of an optical backplane and reduces the cost.

[0005] The embodiment of the present application provides an optical interconnection system, comprising: an optical interconnection device and at least one single board; the optical interconnection device comprises: at least one connection box; each of the connection boxes comprises at least one connection module; each connection module is connected to a connector on the corresponding connection box;

[0006] Each of the single boards is optically connected to at least one connector in at least one of the connection boxes.

[0007] In one embodiment, each of the connection modules is connected to a connector on the corresponding connection box, including:

[0008] Each of the connection modules is connected to a connector on the corresponding connection box via an optical fiber;

[0009] Alternatively, the connector of each connection module serves as the connector on the corresponding connection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural block diagram of an optical interconnection system provided by the present application;

[0011] Figure 2 is an internal schematic diagram of an optical interconnection device provided in an embodiment of the present application;

[0012] Figure 3 is an internal connection diagram of a connection module provided in an embodiment of the present application;

[0013] Figure 4 is an application example diagram of an optical interconnection system provided in an embodiment of the present application;

[0014] Figure 5 This is an example diagram of an optical interconnection system provided by an embodiment of the present application being applied in a switching device;

[0015] Figure 6 This is an example diagram of an optical interconnection system provided in an embodiment of the present application applied in a ROADM. DETAILED DESCRIPTION

[0016] The following will describe the embodiments of the present application in conjunction with the accompanying drawings. The following will describe the present application in conjunction with the accompanying drawings of the embodiments, and the examples cited are only used to explain the present application and are not used to limit the scope of the present application.

[0017] Figure 1 This is a structural block diagram of an optical interconnection system provided by the present application. Figure 1 As shown, the optical interconnection system in this embodiment includes: an optical interconnection device 10 and at least one single board 20; the optical interconnection device 10 includes: at least one connection box 101; each connection box 101 includes at least one connection module 1011; each connection module 1011 is connected to at least one connector 1012 on the corresponding connection box 101; each single board 20 is optically connected to at least one connector 1012 in at least one connection box 101.

[0018] exist Figure 1 In the embodiment, the optical interconnection system includes: an optical interconnection device 10 and a single board 20, and the optical interconnection device 10 includes: a connection box 101, each connection box 101 includes two connection modules 1011 as an example, and the structure of the optical interconnection system is described.

[0019] In an embodiment, the optical interconnection system includes at least one connection box, each connection box includes at least one connection module, and each connection box includes two types of ports. Exemplarily, each connection box is divided into two types: port A and port B. At the same time, the optical interconnection system also includes at least one single board. In an embodiment, each single board is optically connected to at least one connector in each connection box (it can be an optical fiber connection or a direct connection) to achieve the effect of optical interconnection. In this embodiment, the optical backplane is disassembled into at least one connection box, and a connection box is disassembled into at least one connection module, so that the optical interconnection between each single board and at least one connector in each connection box is achieved. Through the combination of multiple simple connection modules, complex optical backplane connections are achieved, thereby greatly reducing the difficulty and cost of manufacturing the optical backplane.

[0020] In an embodiment, the connector on the connection box refers to a port of the connection box. In an embodiment, each connection module is connected to a connector on a corresponding connection box, including: each connection module is connected to a connector on a corresponding connection box via an optical fiber; or, the connector of each connection module serves as a connector on a corresponding connection box.

[0021] In one embodiment, each single board is optically connected to at least one connector in at least one connection box, including: each single board is optically connected to at least one connector in at least one connection box through an optical fiber or an optical fiber ribbon, and when a preset interlaced connection relationship is satisfied. The preset interlaced connection relationship means that at least one connection is maintained between two ports of the single board.

[0022] In one embodiment, when the optical interconnection system includes two single boards, the preset interlaced connection relationship includes: each first port on each first single board is optically connected to at least one first port on at least one connection box; each second port on each second single board is optically connected to at least one second port on at least one connection box. The interface on the first single board is port A, and the interface on the second single board is port B, which can be connected to port A and port B on the connection box respectively through optical fiber or optical fiber ribbon. Exemplarily, in one embodiment, the first single board is a line card (LineCard, LC) single board; the second single board is a switch card (SwitchCard, SC) single board. In one embodiment, when the optical interconnection system includes two single boards, the first port is an LC port; the second port is an SC port. Among them, the preset interlaced connection relationship means that at least one connection is maintained between the whole formed by all ports of each LC single board and the whole formed by all ports of each SC single board.

[0023] In an embodiment, when the optical interconnection system includes two single boards, the single board may be an LC single board or an SC single board, that is, when the first single board is an LC single board, the second single board is an SC single board; correspondingly, when the first single board is an SC single board, the second single board is an LC single board. In this embodiment, taking the first single board as an LC single board and the second single board as an SC single board as an example, the connection relationship between the single board and the port on the connection box is described. In an embodiment, the first single board is an LC single board and the second single board is an SC single board, then the first port on the connection box is an LC port, and the second port is an SC port. That is to say, 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.

[0024] In one embodiment, when the optical interconnection system includes a single board, the preset interleaved connection relationship includes: each third port on each single board is optically connected to at least one third port on at least one connection box; each fourth port on each single board is optically connected to at least one fourth port on at least one connection box. In one embodiment, when the optical interconnection system includes a wavelength division multiplexing demultiplexing single board, the third port is a wavelength division multiplexer (DeM) port; the fourth port is a wavelength division multiplexer (Mux) port. In an embodiment, when 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 single board includes a third port and a fourth port. Correspondingly, each connection box includes a plurality of third ports and a plurality of fourth ports. Exemplarily, taking the third port as a DeM port and the fourth port as a Mux port as an example, the connection relationship between the ports on the single board and the connection box is described. In an embodiment, all DeM ports on each single board are connected to the DeM port on the connection box, and all Mux ports on each single board are connected to the Mux port on the connection box. The preset interleaving connection relationship means that at least one connection is maintained between the whole formed by all Mux ports on each single board and the whole formed by all DeM ports on each single board.

[0025] In one embodiment, the connection module includes one of the following: an optical fiber flexible board; an optical waveguide board; a printed circuit board (PCB); and a cable board.

[0026] Figure 2 Schematic diagram of the interior of an optical interconnection device provided in an embodiment of the present application. Figure 2 As shown, the optical interconnection device includes n connection boxes, n≥1; each connection box includes m connection modules, m≥1; each connection module is connected to the connector on the corresponding connection box. Each connection module can be connected to the connector on the corresponding connection box through an optical fiber, or directly used as the connector of the connection box through the connector of the connection module itself. Exemplarily, the connection box 1 includes connection module 1, connection module 2...connection module m, and each connection module is connected to the connector on the connection box 1. In the embodiment, the connector on the connection box refers to the port on the connection box; the connector on the connection module refers to the port on the connection module.

[0027] Figure 3 : is an internal connection diagram of a connection module provided in an embodiment of the present application. Figure 3As shown, each connection module may include two types of connectors, for example, the connection module is internally divided into connectors A and B. Among them, there are 1 to a connectors A in total, and 1 to b connectors B in total, a≥1, b≥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 also be combined on one connector. In other words, the distribution of connector A and connector B in the connection module can be set arbitrarily, and there is no specific limitation on this. A connection box includes at least one connection module, and the connection relationship between each connection module and all connectors on each connection box can be connected through optical fiber, or the connection port of the connection module (i.e., the port in the above embodiment) can be directly used as a connector on the connection box.

[0028] Figure 4 is an application example diagram of an optical interconnection system provided in an embodiment of the present application. Figure 4 As shown, it is assumed that there are n connection boxes (connection box 1, connection box 2 ... connection box n) and k single boards (single board 1, single board 2 ... single board k) inside a device, where n≥1, k≥1. Connector A and connector B are included in each connection box. In an embodiment, each single board can be connected to each connection box through an optical fiber or an optical fiber ribbon. In one embodiment, the single boards can be divided into two types: single board C and single board D, so that all connectors on these two single boards are respectively connected to connector A and connector B on each connection box. In one embodiment, if there is only one single board on the device, that is, single board C and single board D are merged into one single board, then the merged single board is simultaneously connected to connector A and connector B of each connection box.

[0029] In one implementation, a switching device includes four connection boxes, each of which includes four connection modules, and the connection process of all connectors in the single board and the connection box is described as an example. Figure 5 FIG. 1 is an example diagram of an optical interconnection system provided in an embodiment of the present application being applied in a switching device. Figure 5As shown, it is assumed that the switching device includes 4 connection boxes (connection box 1, connection box 2, connection box 3 and connection box 4), and each connection box has 4 connection modules. Each connection module includes 16 LC ports and 16 SC ports externally, and each LC port and each SC port are 16-core optical connectors, that is, each connection box has a total of 1 to 64 LC ports and 1 to 64 SC ports, and each LC port and SC port are 16-core optical connectors. Exemplarily, 1 to 16 LC and 1 to 16 SC are on the same connection module (i.e., the first connection module on the connection box 1, 2, 3 or 4), and there is one optical path between each LC port and each SC port; 17 to 32 LC and 17 to 32 SC are on the same connection module (i.e., the second connection module on the connection box 1, 2, 3 or 4), and there is one optical path between each LC port and each SC port; and so on.

[0030] In the embodiment, it is assumed that there are two types of boards on a switching device, for example, board C is an LC board and board D is an SC board. In this embodiment, there are 64 LC boards on the switching device, each of which has a framer and a deframer, which outputs 32 transmit and receive line pairs (i.e., 32 receive and 32 transmit, for a total of 64 signals). Each LC board outputs four 16-core ports, such as Figure 5 There are 4 diagonal squares on the LC board shown in FIG. There are 4 connection signals (i.e., 2 receiving and 2 transmitting) between each LC board and each SC board.

[0031] In the embodiment, there are 16 SC boards on the switching device. Each SC board has a switch chip (SwitchFabric, SF), which outputs 128 transceiver line pairs. Each SC board outputs 16 16-core ports, such as Figure 5 The 16 grey boxes on the SC plate shown in .

[0032] In the connection between each single board and each connection box, the j=[1,16]th port on the SC board i=[1,16] is connected to the {remainder of [(j-1) / 4]}*16+ith SC port on the connection box of the integer part of [(j-1) / 4]+1; the n=[1,4]th port on the LC board m=[1,64] is connected to the m=[1,64]th LC port of the connection box n=[1,4]. Among them, i=[1,16] means that i is any number from 1, 2...16; j=[1,16] means that j is any number from 1, 2...16; m=[1,64] means that m is any number from 1, 2...64; n=[1,4] means that n is any number from 1, 2...4.

[0033] Through the above-mentioned interlaced connection, it is possible to achieve connection between the LC port of each LC board and the LC port on at least one connection box, and between the SC port on each SC board and the port of the SC board on at least one connection box, that is, it is possible to achieve connection between the port of each LC board and the ports of all SC boards, with four optical paths.

[0034] In one implementation, a reconfigurable optical add-drop multiplexer (ROADM) includes three connection boxes, each of which includes three connection modules. The connection process of a single board and all connectors in the connection box is described as an example. Figure 6 FIG. 1 is an example diagram of an optical interconnection system provided in an embodiment of the present application applied in a ROADM. Figure 6 As shown in the figure, it is assumed that there are three connection boxes (connection box 1, connection box 2, connection box 3) in the ROADM, and each connection box has three connection modules. Each connection module includes 24 Mux ports (i.e., diagonal boxes) and 24 DeM ports (i.e., gray boxes) to the outside, and each Mux port and each DeM port are 24-core optical connectors, that is, there are 1 to 72 Mux ports and 1 to 72 DeM ports on each connection box, and each port is a 24-core optical connector. Among them, 1 to 24 Mux and 1 to 24 DeM are on the same connection module (i.e., the first connection module on the connection box 1, 2 or 3), and there is one optical path between each Mux port and each DeM port; 25 to 48 Mux and 25 to 48 DeM are on the same connection module (i.e., the second connection module on the connection box 1, 2 or 3), and there is one optical path between each Mux port and each DeM port; and so on.

[0035] In a ROADM device, there is a board, that is, board C and board D are combined on the same board. In the embodiment, the ROADM device has 72 boards, each of which includes 3 DeM connectors (such as Figure 6 The gray box in the figure) and 3 Mux connectors (such as Figure 6 Each connector is a 24-core optical connector.

[0036] In the connection between each single board and each connection box, the j=[1,3]th gray box port (i.e., DeM port) on single board i=[1,72] is connected to the 24*(j-1)+[(i-1) / 24]th gray box of the integer part+1 of the connection box of [(i-1) / 24]th; the j=[1,3]th slash box port (i.e., Mux port) on single board i=[1,72] is connected to the i=[1,72]th slash box port of the connection box j=[1,3]. In the embodiment, i=[1,72] means that i is any number among 1, 2...72; j=[1,3] means that j is any number among 1, 2 and 3.

[0037] Through the above interleaved connection, the DeM core of each single board can be connected to the DeM port on each connection box, and the Mux core on each single board can be connected to the Mux port on each connection box, that is, there is an optical path connection between each single board and each connection box.

[0038] In the above embodiment, the connection module is distinguished by two rows of ports, which does not mean that the two ports are arranged up and down in reality. They can be on the same row on the same side of the connection module, or distributed on both sides of the connection module, or in other distribution forms.

[0039] In one embodiment, the connection module may be a fiber optic flexible board, an optical waveguide board, etc.

[0040] In one embodiment, the optical connection may also be an electrical connection, the optical fiber is changed to a cable, and the connection module may be a PCB board or a cable board, etc.

[0041] In the embodiment, the interconnection device in the above embodiment overcomes the problems of the existing optical backplane such as the difficulty in realizing and the high cost, greatly simplifies the manufacturing difficulty of the optical backplane, and reduces the cost.

[0042] The above description is only an exemplary embodiment of the present application, and it should be understood that the protection scope of the present invention is not limited to such description and embodiment. Any modification and change made by relevant personnel in the field through non-creative work shall fall within the protection scope of this patent.

[0043] By way of exemplary and non-limiting examples, a detailed description of exemplary embodiments of the present application has been provided above. However, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and claims, but will not depart from the scope of the present application. Therefore, the proper scope of the present application will be determined according to the claims.

Claims

1. An optical interconnection system, characterized in that: include: An optical interconnect device and at least one board; The optical interconnection device comprises: at least one connection box; each of the connection boxes comprises at least one connection module; each of the connection modules is connected to a connector on the corresponding connection box; Each of the single boards is optically connected to at least one connector in at least one of the connection boxes; Each of the single boards is optically connected to at least one connector in at least one of the connection boxes, including: Each of the single boards is optically connected to at least one connector in at least one of the connection boxes through an optical fiber or an optical fiber ribbon and under the condition of satisfying a preset interlaced connection relationship, wherein the preset interlaced connection relationship means that at least one connection is maintained between the two ports of the single board; The connection module is an optical waveguide plate.

2. The optical interconnection system according to claim 1, characterized in that: Each of the connection modules is connected to a connector on the corresponding connection box, including: Each of the connection modules is connected to a connector on the corresponding connection box via an optical fiber; Alternatively, the connector of each connection module serves as the connector on the corresponding connection box.

3. The optical interconnection system according to claim 1, characterized in that: In the case where the optical interconnection system includes two single boards, the preset interleaved connection relationship includes: each first port on each first single board is optically connected to at least one first port on at least one of the connection boxes; Each second port on each second board is optically connected to at least one second port on at least one of the connection boxes.

4. The optical interconnection system according to claim 1, characterized in that: In the case where the optical interconnection system includes a single board, the preset interleaved connection relationship includes: each third port on each of the single boards is optically connected to at least one third port on at least one of the connection boxes; Each fourth port on each of the boards is optically connected to at least one fourth port on at least one of the connection boxes.

5. The optical interconnection system according to claim 3, characterized in that: The first single board is a line card LC single board; the second single board is a switch card SC single board.

6. The optical interconnection system according to claim 5, characterized in that: In the case where the optical interconnection system includes two boards, the first port is an LC port; and the second port is an SC port.

7. The optical interconnection system according to claim 4, characterized in that: In the case where the optical interconnection system includes a single board, the third port is a wavelength division multiplexer DeM port; and the fourth port is a multiplexer Mux port.

8. The optical interconnection system according to claim 1, characterized in that: The connection module also includes one of the following: an optical fiber flexible board; a PCB board; a cable board.

9. The optical interconnection system according to claim 1, characterized in that: Each of the ports is a connector.

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