Master-slave gateway device, fiber-to-the-room system and communication method

Abstract

The present disclosure relates to a master-slave gateway device, a fiber-to-room system and a communication method. The master-slave gateway device comprises: a master gateway, which is equipped with a passive color optical module; a first slave gateway, which is equipped with a color optical module of at least one working wavelength, wherein the master gateway and the first slave gateway are directly connected via a point-to-point optical fiber to perform point-to-point optical fiber direct communication. The present disclosure has the characteristics of supporting high-bandwidth and low-latency service carrying between the master and slave gateways.

Description

Technical Field

[0001] The present disclosure relates to the field of network technology and security, and in particular to a master-slave gateway device, a FTTR (Fiber to The Room) system and a communication method. Background Art

[0002] In the PON (Passive Optical Network) all-optical networking scenario, FTTR technology is used to deploy master-slave gateways to achieve all-optical coverage. Related technologies At present, the master-slave gateways are mainly point-to-multipoint networking, and the master and slave gateways continue to use the original EPON (Ethernet Passive Optical Network) / GPON (Gigabit-Capable Passive Optical Network) protocol for communication. Each slave gateway needs to apply to the master gateway for "windowing" to complete the uplink data transmission. Summary of the invention

[0003] In view of at least one of the above technical problems, the present disclosure provides a master-slave gateway device, a fiber-to-the-room system and a communication method, which have the characteristics of supporting high-bandwidth and low-latency service carrying between the master and slave gateways.

[0004] According to one aspect of the present disclosure, there is provided a master-slave gateway device, comprising:

[0005] The main gateway is equipped with a passive color optical module;

[0006] The first slave gateway has at least one color optical module with a working wavelength built in.

[0007] The master gateway and the first slave gateway are directly connected via point-to-point optical fiber to perform point-to-point optical fiber direct communication.

[0008] In some embodiments of the present disclosure, the master-slave gateway device includes:

[0009] Multiple first slave gateways;

[0010] The master gateway and the multiple first slave gateways are directly connected via point-to-point optical fibers in parallel to complete point-to-point communication.

[0011] In some embodiments of the present disclosure, the master-slave gateway device includes:

[0012] Multiple first slave gateways;

[0013] The master gateway and multiple first slave gateways are directly connected via point-to-point optical fibers in a cascade manner to complete point-to-point communication.

[0014] In some embodiments of the present disclosure, the master-slave gateway device further includes:

[0015] A plurality of second slave gateways, each second slave gateway comprising a passive optical network module;

[0016] The master gateway includes a passive optical network module, and point-to-multipoint communication is accomplished between the master gateway and the second slave gateway through point-to-multipoint time division multiplexing.

[0017] In some embodiments of the present disclosure, the forwarding priority of the service carried by the first slave gateway is higher than the forwarding priority of the service carried by the second slave gateway.

[0018] In some embodiments of the present disclosure, multiple first slave gateways are set with different forwarding priorities.

[0019] In some embodiments of the present disclosure, the operating wavelengths of the color optical modules in the multiple slave gateways are different;

[0020] Different working wavelengths are forwarding priority identifiers corresponding to the first slave gateway.

[0021] According to another aspect of the present disclosure, a fiber-to-the-room FTTR system is provided, comprising: at least one master-slave gateway device as described in any of the above embodiments.

[0022] In some embodiments of the present disclosure, the FTTR system includes a first master-slave gateway device and a second master-slave gateway device, wherein:

[0023] In the first master-slave gateway device, the master gateway and the plurality of first slave gateways are directly connected via point-to-point optical fibers in parallel to complete point-to-point communication;

[0024] In the second master-slave gateway device, the master gateway and the plurality of first slave gateways are directly connected via point-to-point optical fibers in a cascade manner to complete point-to-point communication.

[0025] According to another aspect of the present disclosure, there is provided a communication method, comprising:

[0026] The master gateway and the first slave gateway communicate with each other via a point-to-point optical fiber direct connection, wherein the master gateway and the first slave gateway are the master gateway and the first slave gateway in the master-slave gateway device as described in any of the above embodiments.

[0027] In some embodiments of the present disclosure, the master gateway and the first slave gateway communicate through a point-to-point optical fiber direct connection, including:

[0028] The master gateway and the first slave gateway communicate with each other in a point-to-point optical fiber direct connection and parallel manner.

[0029] In some embodiments of the present disclosure, the master gateway and the first slave gateway communicate through a point-to-point optical fiber direct connection, including:

[0030] The master gateway and the first slave gateway communicate with each other through a point-to-point optical fiber direct connection cascade.

[0031] In some embodiments of the present disclosure, the communication method further includes:

[0032] The master gateway and the second slave gateway communicate with each other via a point-to-multipoint time division multiplexing method, wherein the second slave gateway is the second slave gateway in the master-slave gateway device as described in any of the above embodiments of the present disclosure.

[0033] In some embodiments of the present disclosure, the communication method further includes:

[0034] The forwarding priority of the service carried by the first slave gateway is set to be higher than the forwarding priority of the service carried by the second slave gateway.

[0035] In some embodiments of the present disclosure, the communication method further includes:

[0036] Set different forwarding priorities for multiple first slave gateways.

[0037] In some embodiments of the present disclosure, the communication method further includes:

[0038] Set the working wavelengths of multiple color optical modules in the gateway to be different;

[0039] Different working wavelengths are used as forwarding priority identifiers corresponding to the first slave gateway.

[0040] The present disclosure has the characteristics of supporting high-bandwidth and low-latency business carrying between master and slave gateways. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 Schematic diagram of some embodiments of the master-slave gateway device disclosed in the present invention.

[0043] Figure 2 Schematic diagram of some embodiments of the fiber-to-the-room system disclosed herein.

[0044] Figure 3 The following are schematic diagrams of some embodiments of the communication method disclosed herein. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0047] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0048] Technologies, network access methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, such technologies, network access methods and devices should be considered part of the authorization specification.

[0049] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] Figure 1 Schematic diagram of some embodiments of the master-slave gateway device disclosed in the present invention. Figure 1 As shown, the master-slave gateway device of the present disclosure may include a master gateway 10 and a first slave gateway 20, wherein:

[0052] The main gateway 10 is deployed with a passive color optical module.

[0053] The first slave gateway 20 has a built-in color optical module with at least one working wavelength.

[0054] The master gateway 10 and the first slave gateway 20 are directly connected via a point-to-point optical fiber to perform point-to-point optical fiber direct communication.

[0055] In some embodiments of the present disclosure, Figure 1 As shown, the master gateway 10 may be an industrial PON master gateway; the first slave gateway 20 may be an industrial PON slave gateway.

[0056] In some embodiments of the present disclosure, Figure 1 As shown, the master-slave gateway device includes multiple first slave gateways.

[0057] Figure 1 Schematic diagram of the network of the master-slave gateway point-to-point parallel group disclosed in the present invention. Figure 1 As shown, the master gateway 10 and the plurality of first slave gateways 20 can be directly connected via point-to-point optical fibers in parallel to complete point-to-point communication.

[0058] In some other embodiments of the present disclosure, the master gateway 10 and the plurality of first slave gateways 20 may be directly connected via point-to-point optical fibers in a cascade manner to achieve point-to-point communication.

[0059] In some embodiments of the present disclosure, the master gateway 10 has a built-in passive color optical module, and can communicate with multiple first slave gateways 20 in a point-to-point manner by direct optical fiber connection.

[0060] In some embodiments of the present disclosure, the master gateway deploys a point-to-point optical module as needed, and is connected to the first slave gateway via a direct optical fiber connection. Figure 1 and Figure 2 The upper right box shows the Figure 2 box on the lower right).

[0061] The above-mentioned embodiments of the present disclosure have the characteristics of supporting high-bandwidth and low-latency service carrying between master and slave gateways; at the same time, the color optical module is adopted, and there is no need to support the burst transmission and burst reception required by the PON technology. Especially in high-speed scenarios, it has the advantages of greater technical difficulty, mature industrial chain and low overall cost.

[0062] In some embodiments of the present disclosure, multiple first slave gateways 20 are set with different forwarding priorities.

[0063] In some embodiments of the present disclosure, the operating wavelengths of the color optical modules in the multiple slave gateways are different.

[0064] In some embodiments of the present disclosure, Figure 1 As shown, the working wavelengths of the color optical modules in the four slave gateways from top to bottom are different. The working wavelengths between the four first slave gateways 20 and the master gateway 10 from top to bottom are: uplink 1471nm, downlink 1271nm; uplink 1491nm, downlink 1291nm; uplink 1511nm, downlink 1311nm; uplink 1571nm, downlink 1371nm. Among them, up and down are the directions from the first slave gateway 20 to the master gateway 10, and downlink is the direction from the master gateway 10 to the first slave gateway 20.

[0065] In some embodiments of the present disclosure, different working wavelengths are forwarding priority identifiers corresponding to the first slave gateway 20. For example: Figure 1 In the embodiment, 1471 nm, 1491 nm, 1511 nm and 1571 nm can be respectively used as forwarding priority identifiers of four first slave gateways 20 from top to bottom.

[0066] In some embodiments of the present disclosure, the first slave gateway is a slave gateway of a point-to-point working wavelength.

[0067] In some embodiments of the present disclosure, Figure 1 As shown, the master gateway 10 and the first slave gateway 20 are connected via an optical fiber cable.

[0068] In some embodiments of the present disclosure, Figure 1 As shown, the optical fiber between the master gateway 10 and the first slave gateway 20 is a single-fiber bidirectional optical fiber.

[0069] The slave gateways of the point-to-point working wavelengths in the above embodiments of the present disclosure can also forward services according to high and low priorities, and scheduling and forwarding of services between the slave gateways can be achieved by defining different working wavelengths as identifiers of priority queues.

[0070] The above embodiments of the present disclosure propose a point-to-point FTTR master-slave gateway networking technology based on passive color light. For government, enterprise, industry and industrial Internet scenarios, the slave gateway carries services with high bandwidth and low latency. At the same time, priority scheduling can be performed between the slave gateways through different working wavelengths.

[0071] The advantages of the point-to-point optical fiber direct connection method used in the above embodiments of the present disclosure are: 1) high bandwidth; 2) low latency; 3) the optical fiber distance between the master and slave gateways in the FTTR network is short, which can save an optical splitter device.

[0072] The above-mentioned embodiments of the present disclosure innovatively propose a point-to-point optical fiber direct connection mechanism based on passive colored light for the point-to-point master gateway, and use different working wavelengths for each slave gateway to communicate with the master gateway in a point-to-point manner. During this period, the passive optical network uses miniaturized wavelength division devices.

[0073] In some embodiments of the present disclosure, the main gateway 10 may be equipped with a built-in PON optical module supporting burst transmission to perform point-to-multipoint time-division multiplexing communication with an OLT (Optical Line Terminal) device.

[0074] In some embodiments of the present disclosure, Figure 1 As shown, the main gateway 10 can be connected to the OLT device through an optical splitter.

[0075] In some embodiments of the present disclosure, Figure 1As shown, the master gateway 10 also has a built-in power supply unit.

[0076] In some embodiments of the present disclosure, Figure 1 As shown, the transmission rate from the optical splitter to the master gateway 10 is 10 Gbit / s; the transmission rate from the master gateway 10 to the first slave gateway 20 is 1 Gbit / s.

[0077] In some embodiments of the present disclosure, the master-slave gateway device may be a point-to-point communication mode between independent color light modules.

[0078] In some other embodiments of the present disclosure, the master-slave gateway device may also be a hybrid communication mode of point-to-multipoint time division multiplexing PON optical module and point-to-point optical fiber direct connection of optical modules.

[0079] In some embodiments of the present disclosure, the master-slave gateway device may further include multiple second slave gateways, wherein each second slave gateway includes a passive optical network module; the master gateway 10 includes a passive optical network module, and the master gateway 10 and the second slave gateways complete point-to-multipoint communication through a point-to-multipoint time division multiplexing method.

[0080] In some embodiments of the present disclosure, the forwarding priority of the service carried by the first slave gateway 20 is higher than the forwarding priority of the service carried by the second slave gateway.

[0081] In the above-mentioned embodiment of the present disclosure, when there is a mixture of point-to-point and point-to-multipoint communication between the master gateway and the slave gateway (specifically, there may be point-to-point communication between the master gateway and the first slave gateway, and point-to-multipoint communication between the master gateway and the second slave gateway), the point-to-point slave gateway bearer service ensures the highest priority forwarding.

[0082] According to another aspect of the present disclosure, a fiber-to-the-room FTTR system is provided, comprising: at least one master-slave gateway device as described in any of the above embodiments.

[0083] Figure 2 Schematic diagram of some embodiments of the fiber-to-the-room system disclosed in the present invention. Figure 2 As shown, the FTTR system of the present disclosure may include a first master-slave gateway device 1 and a second master-slave gateway device 2, wherein:

[0084] In the first master-slave gateway device 1, the master gateway 10 and the plurality of first slave gateways 20 are directly connected via point-to-point optical fibers in parallel to complete point-to-point communication.

[0085] In some embodiments of the present disclosure, the first master-slave gateway device 1 may be Figure 1 A master-slave gateway device of an embodiment.

[0086] In some embodiments of the present disclosure, in the second master-slave gateway device 2, the master gateway 10 and the plurality of first slave gateways 20 are directly connected via point-to-point optical fibers in a cascade manner to complete point-to-point communication.

[0087] In some embodiments of the present disclosure, Figure 2 As shown in the second master-slave gateway device 2, the working wavelengths of the color optical modules in the three slave gateways from left to right are different, and the working wavelengths between the three first slave gateways 20 and the master gateway 10 from left to right are: uplink 1471nm, downlink 1271nm; uplink 1491nm, downlink 1291nm; uplink 1571nm, downlink 1371nm. Among them, up and down are the directions from the first slave gateway 20 to the master gateway 10, and downlink is the direction from the master gateway 10 to the first slave gateway 20.

[0088] Figure 2 This is a schematic diagram of the master-slave gateway point-to-point optical fiber direct parallel and cascade hybrid networking disclosed in the present invention. Figure 2 As shown, in terms of networking, the master-slave gateway (such as the first master-slave gateway device 1) can adopt the traditional passive colored light point-to-point connection method (that is, the optical fiber direct connection adopts the parallel connection method), and the master-slave gateway (such as the second master-slave gateway device 2) can also adopt the passive colored light point-to-point cascade method to meet different full-optical coverage requirements (that is, the optical fiber direct connection can also adopt the cascade method).

[0089] In some embodiments of the present disclosure, the master gateway can deploy point-to-point optical modules as needed, and connect to the first slave gateway through a direct optical fiber connection, which can be connected in parallel (such as Figure 1 and Figure 2 The first master-slave gateway device 1 in FIG. 1 can also be cascaded (as shown in FIG. 1 ). Figure 2 As shown in the second master-slave gateway device 2).

[0090] In some embodiments of the present disclosure, Figure 2 As shown, the FTTR system of the present disclosure may further include an optical line terminal 3, an optical fiber splitter box 4 and an optical splitter 5, wherein:

[0091] In some embodiments of the present disclosure, Figure 2 As shown, the optical line terminal 3 may be an industrial PON OLT; the optical fiber splitter box 4 is arranged at the optical cable splitter node.

[0092] In some embodiments of the present disclosure, Figure 2 As shown, the operating wavelength of the optical line terminal 3 may be 1577 nm.

[0093] In some embodiments of the present disclosure, Figure 2 As shown, the optical splitter 5 may be a 1:N optical splitter. Figure 2 In an embodiment, N may be 4.

[0094] In some embodiments of the present disclosure, the optical line terminal 3 is connected to the optical fiber splitter box 4 through a trunk optical fiber. After the optical fiber splitter box 4 splits the optical fiber, the optical splitter 5 is used to split the optical signal to the first master-slave gateway device 1 and the second master-slave gateway device 2.

[0095] The present disclosure provides a point-to-point FTTR system. The above embodiments of the present disclosure can be applied to all-optical networking scenarios based on FTTR architecture in a PON network.

[0096] The above-mentioned embodiments of the present disclosure can provide high-bandwidth, low-latency services to high-value users such as the industrial Internet, government and enterprises.

[0097] The above-mentioned embodiments of the present disclosure can also provide high-bandwidth and low-latency services on demand for high-value public users.

[0098] Figure 3 Schematic diagram of some embodiments of the communication method of the present disclosure. Preferably, the present embodiment can be performed by the master-slave gateway device of the present disclosure or the fiber-to-the-room system of the present disclosure. The network access method may at least include step 30, wherein:

[0099] In step 30, the master gateway 10 and the first slave gateway 20 communicate with each other via a point-to-point optical fiber direct connection, wherein the master gateway 10 and the first slave gateway 20 are the master gateway 10 and the first slave gateway 20 in the master-slave gateway device as described in any of the above embodiments of the present disclosure.

[0100] In some embodiments of the present disclosure, step 30 may include at least one of step 31 and step 32, wherein:

[0101] Step 31, the master gateway 10 and the first slave gateway 20 communicate with each other in a point-to-point optical fiber direct connection and parallel manner.

[0102] Step 32, the master gateway 10 and the first slave gateway 20 communicate with each other through a point-to-point optical fiber direct connection cascade.

[0103] In some embodiments of the present disclosure, the communication method may further include: the master gateway and the second slave gateway communicate via point-to-multipoint time division multiplexing, wherein the second slave gateway is the second slave gateway in the master-slave gateway device as described in any of the above embodiments of the present disclosure.

[0104] In some embodiments of the present disclosure, the communication method may further include: setting the forwarding priority of the service carried by the first slave gateway 20 to be higher than the forwarding priority of the service carried by the second slave gateway.

[0105] In some embodiments of the present disclosure, the communication method may further include: setting different forwarding priorities for the multiple first slave gateways 20 .

[0106] In some embodiments of the present disclosure, the communication method may further include: setting the working wavelengths of the color optical modules in the plurality of slave gateways to be different; and using the different working wavelengths as forwarding priority identifiers corresponding to the first slave gateway 20 .

[0107] The above-mentioned embodiments of the present disclosure propose a master-slave gateway device communication working mechanism.

[0108] In terms of service forwarding in the above-mentioned embodiments of the present disclosure, the PON master gateway ensures the highest priority for forwarding services carried by slave gateways using point-to-point communication.

[0109] The above-mentioned embodiments of the present disclosure support redefining the priority of service forwarding between different working wavelengths in point-to-point communication.

[0110] In terms of networking, the above-mentioned embodiments of the present disclosure can use the traditional passive colored light point-to-point connection method for the master-slave gateway (i.e., the optical fiber direct connection adopts the parallel connection method), or can use the passive colored light point-to-point cascading method to meet different full-optical coverage requirements (i.e., the optical fiber direct connection can also adopt the cascading method).

[0111] The inventors discovered through research and development that the master-slave gateways of the related technology FTTR architecture adopt the traditional PON point-to-multipoint time division multiplexing mechanism. The slave gateways need the master gateway to open windows and compete with each other. It is difficult to guarantee bandwidth and latency relative to point-to-point communication.

[0112] The above-mentioned embodiments of the present disclosure propose a master-slave gateway point-to-point communication method (including equipment and working mechanism) under the original FTTR architecture, which can provide reliable service bearing for high-bandwidth and low-latency scenarios.

[0113] The above-mentioned embodiments of the present disclosure propose point-to-point communication between master and slave gateways based on passive color optical wavelength division technology, providing high-bandwidth and low-latency solutions for government, enterprise, industry and industrial Internet scenarios.

[0114] The above-mentioned embodiments of the present disclosure strictly guarantee the priority forwarding of point-to-point communication slave gateway services for the mixed scenario of point-to-multipoint and point-to-point communications between the master and slave gateways; priority marking is performed between the point-to-point communication slave gateways through the working wavelength, breaking the traditional Ethernet-based VLAN priority method and other methods to meet further business SLA requirements.

[0115] Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0116] The present disclosure is described with reference to the flowcharts and / or block diagrams of the network access methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of the processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0119] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0120] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by instructing the relevant hardware through a program, and the program may be stored in a non-transitory computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0121] The description of the present disclosure is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present disclosure to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure, and to enable those of ordinary skill in the art to understand the present disclosure and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A master-slave gateway device, comprising: The main gateway is equipped with a passive color optical module; The first slave gateway has a built-in color optical module with at least one working wavelength; A plurality of second slave gateways, each second slave gateway comprising a passive optical network module; Among them, the master gateway and the first slave gateway are directly connected through point-to-point optical fiber to carry out point-to-point optical fiber direct communication; the master gateway includes a passive optical network module, and the master gateway and the second slave gateway complete point-to-multipoint communication through point-to-multipoint time division multiplexing; the forwarding priority of the first slave gateway bears a higher priority than the forwarding priority of the second slave gateway bears a higher priority.

2. The master-slave gateway device according to claim 1, comprising: Multiple first slave gateways; The master gateway and the multiple first slave gateways are directly connected via point-to-point optical fibers in parallel to complete point-to-point communication.

3. The master-slave gateway device according to claim 1, comprising: Multiple first slave gateways; The master gateway and multiple first slave gateways are directly connected via point-to-point optical fibers in a cascade manner to complete point-to-point communication.

4. A master-slave gateway device, comprising: The main gateway is equipped with a passive color optical module; A plurality of first slave gateways, each of which is equipped with a color optical module of at least one working wavelength; The master gateway and the multiple first slave gateways are directly connected via point-to-point optical fibers in parallel to complete point-to-point communication; the multiple first slave gateways are set with different forwarding priorities; The working wavelengths of the colored optical modules in the multiple slave gateways are different; the different working wavelengths are forwarding priority identifiers corresponding to the first slave gateway.

5. A master-slave gateway device, comprising: The main gateway is equipped with a passive color optical module; A plurality of first slave gateways, each of which is equipped with a color optical module of at least one working wavelength; Among them, the master gateway and multiple first slave gateways are directly connected through point-to-point optical fibers in a cascade manner to complete point-to-point communication; multiple first slave gateways are set with different forwarding priorities; The working wavelengths of the colored optical modules in the multiple slave gateways are different; the different working wavelengths are forwarding priority identifiers corresponding to the first slave gateway.

6. The master-slave gateway device according to claim 4 or 5, further comprising: A plurality of second slave gateways, each second slave gateway comprising a passive optical network module; The master gateway includes a passive optical network module, and point-to-multipoint communication is accomplished between the master gateway and the second slave gateway through point-to-multipoint time division multiplexing.

7. The master-slave gateway device according to claim 6, wherein: The forwarding priority of the service carried by the first slave gateway is higher than the forwarding priority of the service carried by the second slave gateway.

8. A fiber-to-the-room FTTR system, comprising: At least one master-slave gateway device as claimed in any one of claims 1-7.

9. The FTTR system according to claim 8, comprising a first master-slave gateway device and a second master-slave gateway device, wherein: The first master-slave gateway device is the master-slave gateway device as claimed in claim 2 or 4; The second master-slave gateway device is the master-slave gateway device as described in claim 3 or 5.

10. A communication method, comprising: The master gateway and the first slave gateway communicate with each other via a point-to-point optical fiber direct connection, wherein the master gateway and the first slave gateway are the master gateway and the first slave gateway in the master-slave gateway device as described in any one of claims 1-7.

11. The communication method according to claim 10, wherein: The master gateway and the first slave gateway communicate via a point-to-point optical fiber direct connection, including: The master gateway and the first slave gateway communicate with each other in a point-to-point optical fiber direct connection and in parallel; and / or, The master gateway and the first slave gateway communicate with each other through a point-to-point optical fiber direct connection cascade.

12. The communication method according to claim 10 or 11, further comprising: The master gateway and the second slave gateway communicate with each other via point-to-multipoint time division multiplexing, wherein the second slave gateway is the second slave gateway in the master-slave gateway device as described in any one of claims 1-3 and 6-7.

13. The communication method according to claim 12, wherein: The forwarding priority of the service carried by the first slave gateway is set to be higher than the forwarding priority of the service carried by the second slave gateway.

14. The communication method according to claim 10 or 11, further comprising: Set different forwarding priorities for multiple first slave gateways.

15. The communication method according to claim 14, further comprising: Set the working wavelengths of multiple color optical modules in the gateway to be different; Different working wavelengths are used as forwarding priority identifiers corresponding to the first slave gateway.

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