WO2021219085A1

WO2021219085A1 - Optical interconnection system

Info

Publication number: WO2021219085A1
Application number: PCT/CN2021/091033
Authority: WO
Inventors: 尚迎春; 叶兵
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-04-29
Filing date: 2021-04-29
Publication date: 2021-11-04
Also published as: CN113572531A

Abstract

The present disclosure provides an optical interconnection system. The optical interconnection system comprises an optical interconnection device and at least one single board; the optical interconnection device comprises at least one connection box; each connection box comprises at least one connection module; each connection module is connected to a connector on the corresponding connection box; and each type of the single board is optically connected to at least one connector in the at least one connection box. In the embodiment, an optical backplane is decomposed into at least one connection box, and each connection box is decomposed into at least one connection module, thus greatly reducing the production difficulty and costs of the optical backplane.

Description

Optical interconnection system

Technical field

The present disclosure relates to communications, and in particular to an optical interconnection system.

Background technique

As the demand for the Internet of Everything becomes stronger and the Internet develops more and more rapidly, a large number of services are transferred instantly between different sites, which puts forward higher and higher requirements for the switching capacity of the switching equipment in the network. With the electrical signals brought about by the increase in the rate of the electrical backplane, when the insertion loss in the internal transmission of the switching equipment is too large to realize the normal internal connection of the subrack, the optical backplane or optical interconnection has become an inevitable choice. .

In the existing optical backplane solution, a large optical backplane is used to connect multiple single boards on the device to realize the optical connection between the multiple single boards. However, this method brings many problems with the optical backplane. For example, the thousands of optical paths on the optical backplane require very complicated connection methods and manufacturing difficulties, which in turn leads to high costs and long manufacturing time.

Summary of the invention

The embodiments of the present disclosure provide an optical interconnection system, which simplifies the manufacturing difficulty of the optical backplane and reduces the cost.

The embodiment of the present disclosure provides an optical interconnection system, including: an optical interconnection device and at least one single board; the optical interconnection device includes: at least one connection box; each connection box includes at least one connection module ; Each of the connection modules is connected to a connector on the corresponding connection box;

Each type of the single board is optically connected with at least one connector in at least one of the connection boxes.

In an embodiment, each connection module connected to the connector on the corresponding connection box includes:

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

Or, the connector of each connection module is used as a connector on the corresponding connection box.

Description of the drawings

Figure 1 is a structural block diagram of an optical interconnection system provided by the implementation of the present disclosure;

2 is an internal schematic diagram of an optical interconnection device provided by an embodiment of the present disclosure;

Fig. 3 is an internal connection diagram of a connection module provided by an embodiment of the present disclosure;

4 is an application example diagram of an optical interconnection system provided by an embodiment of the present disclosure;

FIG. 5 is an example diagram of an optical interconnection system provided by an embodiment of the present disclosure applied in a switching device; FIG.

FIG. 6 is an example diagram of an optical interconnection system provided by an embodiment of the present disclosure applied in ROADM.

Detailed ways

Hereinafter, the embodiments of the present disclosure will be described with reference to the accompanying drawings. The present disclosure will be described below in conjunction with the accompanying drawings of the embodiments. The examples cited are only used to explain the present disclosure, and are not used to limit the scope of the present disclosure.

Fig. 1 is a structural block diagram of an optical interconnection system provided by the implementation of the present disclosure. As shown in Figure 1, 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 contains 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 type of single board 20 is optically connected to at least one connector 1012 in the at least one connection box 101.

In Figure 1, 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 For example, the structure of the optical interconnection system will be explained.

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: A port and B port. At the same time, the optical interconnection system also includes at least one single board. In the embodiment, each single board is optically connected to at least one connector in each connection box (it may 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 one connection box is disassembled into at least one connection module, so that the optical interaction between each type of single board and at least one connector in each connection box is realized. Through the combination of multiple simple connection modules, a complex optical backplane connection is realized, thereby greatly reducing the manufacturing difficulty and cost of the optical backplane.

In the embodiment, the connector on the connection box refers to the port of the connection box. In an embodiment, each connection module is connected to the connector on the corresponding connection box, including: each connection module is connected to the connector on the corresponding connection box through an optical fiber; or, the connector of each connection module serves as the corresponding connection The connector on the box.

In an embodiment, the optical connection between each type of single board and at least one connector in at least one connection box includes: each type of single board passes through an optical fiber or an optical fiber ribbon, and under the condition that a preset interweaving connection relationship is satisfied, with At least one connector in at least one connection box is optically connected. Among them, the preset interleaving connection relationship means that at least one connection is maintained between the two ports of the single board.

In an embodiment, when the optical interconnection system includes two types of single boards, the preset interweaving connection relationship includes: each first port on each first single board and at least one first port on at least one connection box One port is optically connected; 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 the A port, and the interface on the second single board is the B port, which can be connected to the A port and the B port on the connection box through an optical fiber or an optical fiber ribbon. Illustratively, in an 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 an embodiment, when the optical interconnection system includes two types of single boards, the first port is an LC port; the second port is an SC port. The preset interweaving connection relationship means that at least one 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, when the optical interconnection system includes two kinds of 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. 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 ports on the connection box will be described. In the embodiment, if the first single board is an LC single board and the second single board is an SC single board, 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 with the LC port on the connection box, and the SC port on the SC single board is connected with the SC port on the connection box.

In an embodiment, when the optical interconnection system includes a single board, the preset interweaving connection relationship includes: each third port on each single board and at least one third port on at least one connection box Perform optical connection; each fourth port on each single board is optically connected with at least one fourth port on at least one connection box. In an embodiment, when the optical interconnection system includes a single board of wavelength division multiplexing and demultiplexing, the third port is a wavelength division multiplexer (DeM) port; the fourth port is a wavelength division multiplexing器(Mux) port. In the embodiment, when the optical interconnection system includes a single board, the first single board and the second single board are combined on the same single board. Each combined single board includes a third port and a fourth port. Correspondingly, each connection box includes several third ports and several fourth ports. Illustratively, taking the third port as the DeM port and the fourth port as the Mux port as an example, the connection relationship between the single board and the ports on the connection box will be described. In the embodiment, all the DeM ports on each single board are connected with the DeM ports on the connection box, and all the Mux ports on each single board are connected with the Mux ports on the connection box. The preset interweaving connection relationship means that at least one connection is maintained between the whole formed by all Mux ports on each board and the whole formed by all DeM ports on each board.

In an embodiment, the connection module includes one of the following: an optical fiber soft board; an optical waveguide board; a printed circuit board (Printed Circuit Board, PCB); and a cable board.

Fig. 2 is an internal schematic diagram of an optical interconnection device provided by an embodiment of the present disclosure. As shown in Figure 2, the optical interconnection device contains n connection boxes, n≥1; each connection box contains m connection modules, m≥1; each connection module is connected to the connector on the corresponding connection box . Among them, each connection module can be connected to the connector on the corresponding connection box through an optical fiber, or can be directly used as the connector of the connection box through the connector of the connection module itself. Exemplarily, the connection box 1 includes a connection module 1, a connection module 2 ... connection module m, and each connection module is connected to a 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.

Fig. 3 is an internal connection diagram of a connection module provided by an embodiment of the present disclosure. As shown in Figure 3, each connection module can include two types of connectors. For example, the connection module is divided into connectors A and B. Among them, the connector A has a total of 1 to a, and the connector B has a total of 1 to b, with a≥1 and b≥1. There is at least one optical connection from every connector A to every connector B. In an embodiment, the connector A and the connector B may also be combined on one connector. That is to say, the distribution of the connector A and the connector B in the connection module can be set arbitrarily, which is not specifically limited. A connection box includes at least one connection module, and the connection relationship between each connection module and all the connectors on each connection box can be connected by optical fiber or the connection port of the connection module (that is, the port in the above embodiment). ) Directly as a connector on the connection box.

Fig. 4 is an application example diagram of an optical interconnection system provided by an embodiment of the present disclosure. As shown in Figure 4, suppose 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 ), where n≥1 and k≥1. Include connector A and connector B in each connection sum. In the embodiment, each single board and each connection box may be connected by optical fibers or optical fiber ribbons. In an embodiment, the single board can be divided into two types: single board C and single board D, so that all connectors on these two types of single boards are respectively connected to connector A and connector B on each connection box superior. In an embodiment, if there is only one single board on the device, that is, single board C and single board D are combined on a single board, then the combined single board is simultaneously connected to connector A and connection of each connection box.器B上。 B on.

In an implementation manner, the switching device includes 4 connection boxes, and each connection box includes 4 connection modules as an example, to describe the connection process of the single board and all the connectors in the connection box. FIG. 5 is an example diagram of an optical interconnection system provided by an embodiment of the present disclosure applied in a switching device. As shown in Figure 5, suppose that the switching device contains 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, each LC port and each SC port is a 16-core optical connector, 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, 1-16LC and 1-16SC are on the same connection module (that is, on the first connection module on the connection box 1, 2, 3, or 4), and there is a connection between each LC port and each SC port 1 optical path; 17～32LC and 17～32SC are on the same connection module (that is, on the second connection module on the connection box 1, 2, 3 or 4), there is between each LC port and each SC port 1 light path; and so on.

In the embodiment, it is assumed that there are two types of single boards on a switching device, for example, single board C is an LC board, and single board D is an SC board. In this embodiment, there are 64 LC boards on the switching equipment, and each LC board has a framer (Framer), which outputs 32 transceiver pairs (that is, 32 receive and 32 transmit, a total of 64 signals) . Each LC board outputs 4 16-core ports, as shown in Figure 5, 4 on the LC board are boxed with diagonal lines. There are 4 connection signals between each LC board and each SC board (that is, 2 receiving and 2 sending).

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 pairs. Each SC board outputs 16 16-core ports, as shown in Figure 5 on the 16 gray boxes on the SC board.

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

Through the above-mentioned interleaving connection, the LC port of each LC board can be connected to the LC port on at least one connection box, and the SC port on each SC board is connected to the port of the SC board on at least one connection box. That is to say, 4 optical paths are connected between the ports of each LC single board and all the ports of all SC single boards.

In an implementation, take the reconfigurable optical add-drop multiplexer (Reconfigurable Optical Add-Drop Multiplexer, ROADM) contains 3 connection boxes, and each connection box contains 3 connection modules as an example. The connection process of all connectors in the connection box is explained. FIG. 6 is an example diagram of an optical interconnection system provided by an embodiment of the present disclosure applied in ROADM. As shown in Figure 6, suppose that there are 3 connection boxes (connection box 1, connection box 2, connection box 3) in the ROADM, and there are 3 connection modules on each connection box. Each connection module includes 24 Mux ports (that is, slashed boxes) and 24 DeM ports (that is, gray boxes). Each Mux port and each DeM port is a 24-core optical connector, that is, each There are a total of 1 to 72 Mux ports and 1 to 72 DeM ports on the connection box, and each port is a 24-core optical connector. Among them, 1～24Mux and 1～24DeM are on the same connection module (that is, on the first connection module on the connection box 1, 2 or 3), and there is 1 optical path between each Mux port and each DeM port; 25～48Mux and 25～48DeM are on the same connection module (that is, on the second connection module on connection box 1, 2 or 3), there is 1 optical path between each Mux port and each DeM port; and so on .

On a ROADM device, there is a single board, that is, single board C and single board D are combined on the same single board. In the embodiment, the ROADM device has 72 single boards, and each single board contains 3 DeM connectors (gray boxes in Figure 6) and 3 Mux connectors (slashed boxes in Figure 6) ), each connector is a 24-core optical connector.

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

Through the above interweaving connection, the DeM core of each board can be connected to the DeM port on each connection box, and the Mux core of each board can be connected to the Mux port on each connection box, that is, each There is an optical connection between the board and each connection box.

In the above-mentioned embodiment, the way of connecting the upper and lower rows of the module to distinguish the two kinds of ports 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 connecting module, or Distributed on both sides of the connection module, or other forms of distribution.

In an embodiment, the connection module may be an optical fiber soft board, an optical waveguide board, or the like.

In an 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.

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

The above are only exemplary embodiments of the present disclosure, and it should be understood that the protection scope of the present invention is not limited to such statements and embodiments. Modifications and changes made by relevant personnel in the field through non-creative work all fall within the scope of protection of this patent.

By way of exemplary and non-limiting examples, a detailed description of the exemplary embodiments of the present disclosure has been provided above. However, considering the accompanying drawings and claims, various modifications and adjustments to the above embodiments are obvious to those skilled in the art, but they do not deviate from the scope of the present disclosure. Therefore, the proper scope of the present disclosure will be determined according to the claims.

Claims

An 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 connection box includes at least one connection module; The connection module is connected to the connector on the corresponding connection box;

Each type of the single board is optically connected with at least one connector in at least one of the connection boxes.
The optical interconnection system according to claim 1, wherein the connection of each of the connection modules to the corresponding connector on the connection box comprises:

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

Or, the connector of each connection module is used as a connector on the corresponding connection box.
The optical interconnection system according to claim 1, wherein the optical connection between each of the single boards and at least one connector in at least one of the connection boxes comprises:

Each type of the single board is optically connected with at least one connector in at least one of the connection boxes under the condition that the preset interweaving connection relationship is satisfied by the optical fiber or the optical fiber ribbon.
The optical interconnection system according to claim 3, wherein, in the case that the optical interconnection system includes two kinds of single boards, the preset interleaving connection relationship includes: each first single board on each first single board One port is optically connected to at least one first port on at least one of the connection boxes;

Each second port on each second single board is optically connected with at least one second port on at least one of the connection boxes.
The optical interconnection system according to claim 3, wherein, in the case that the optical interconnection system includes a single board, the preset interleaving connection relationship includes: each second on each single board The three ports are optically connected with at least one third port on at least one of the connection boxes;

Each fourth port on each single board is optically connected to at least one fourth port on at least one connection box.
The optical interconnection system according to claim 4, wherein the first single board is a line card LC single board; and the second single board is a switch card SC single board.
The optical interconnection system according to claim 6, wherein, in a case where the optical interconnection system includes two types of single boards, the first port is an LC port; and the second port is an SC port.
The optical interconnection system according to claim 5, wherein, in the case that the optical interconnection system includes a single board, the third port is a DeM port of a wavelength division multiplexer; and the fourth port is Mux port of the multiplexer.
The optical interconnection system according to claim 1, wherein the connection module comprises one of the following: an optical fiber soft board; an optical waveguide board; a PCB board; a cable board.
The optical interconnection system according to claim 1, wherein each of the ports is a connector.