阅读说明：本技术 用于无源光网络链路的保护装置及方法 (Protection device and method for passive optical network link ) 是由 杜喆 李浩琳 张东 孙慧 于 2020-05-29 设计创作，主要内容包括：本公开提供了一种用于无源光网络链路的保护装置及方法,涉及通信技术领域。保护装置包括：第一OLT双模光模块,被配置为支持第一速率通道和第二速率通道；第二OLT双模光模块,被配置为支持第一速率通道和第二速率通道；第一无源光网络链路,与第一OLT双模光模块通信连接,包括级联的多个第一分光器、和多个第一光网络单元,其中,每一级的第一分光器与处于相同级的第一光网络单元连接；和第二无源光网络链路,与第二OLT双模光模块通信连接,包括级联的多个第二分光器、和多个第二光网络单元,其中,每一级的第二分光器与处于相同级的第二光网络单元连接。(The disclosure provides a protection device and a method for a passive optical network link, and relates to the technical field of communication. The protection device includes: a first OLT dual-mode optical module configured to support a first rate channel and a second rate channel; a second OLT dual-mode optical module configured to support a first rate channel and a second rate channel; the first passive optical network link is in communication connection with the first OLT dual-mode optical module and comprises a plurality of cascaded first optical splitters and a plurality of first optical network units, wherein the first optical splitter of each stage is connected with the first optical network unit at the same stage; and the second passive optical network link is in communication connection with the second OLT dual-mode optical module and comprises a plurality of cascaded second optical splitters and a plurality of second optical network units, wherein the second optical splitter of each stage is connected with the second optical network unit at the same stage.)

1. A protection device for a passive optical network link, comprising:

a first Optical Line Terminal (OLT) dual-mode optical module configured to support a first rate channel and a second rate channel;

a second OLT dual mode optical module configured to support the first rate channel and the second rate channel;

the first passive optical network link is in communication connection with the first OLT dual-mode optical module and comprises a plurality of cascaded first optical splitters and a plurality of first optical network units, wherein the first optical splitter of each stage is connected with the first optical network unit at the same stage; and

the second passive optical network link is in communication connection with the second OLT dual-mode optical module and comprises a plurality of cascaded second optical splitters and a plurality of second optical network units, wherein the second optical splitter of each stage is connected with the second optical network unit at the same stage;

each first optical splitter comprises a first port, a second port, a third port and a fourth port; a first port of the first optical splitter at the first stage is in communication connection with the first OLT dual-mode optical module, and a first port of the first optical splitter at the other stage except the first stage is in communication connection with the first optical splitter at the previous stage; the second port of each first optical splitter is in communication connection with the first optical network unit at the same level by using the first rate channel; the third port of each first optical splitter is in communication connection with a second optical network unit at the same level by using the second rate channel; the fourth port of each first optical splitter of the other stages except for the first optical splitter of the last stage is communicatively connected to the first optical splitter of the next stage;

each second optical splitter comprises a fifth port, a sixth port, a seventh port and an eighth port; a fifth port of the second optical splitter at the first stage is in communication connection with the second OLT dual-mode optical module, and fifth ports of the second optical splitters at other stages except the first stage are in communication connection with the second optical splitter at the previous stage; the sixth port of each second optical splitter is in communication connection with a second optical network unit at the same level by using the first rate channel; the seventh port of each second optical splitter is in communication connection with the first optical network unit at the same level by using the second rate channel; the eighth port of each of the second optical splitters of the other stages except for the last-stage second optical splitter is communicatively connected to the second optical splitter of the next stage.

2. The protection device of claim 1, wherein a transmission rate of the second rate channel is less than a transmission rate of the first rate channel.

3. The protection device of claim 1 or 2,

the first rate channel is a primary rate channel, and the second rate channel is a standby rate channel.

4. The protection device of claim 1,

the first OLT dual-mode optical module and the second OLT dual-mode optical module are both positioned in the same optical line terminal.

5. The protection device of claim 1,

the first OLT dual-mode optical module and the second OLT dual-mode optical module are respectively positioned in different optical line terminals.

6. The protection device of claim 1,

in each of the first optical splitters of the other stages except for the last stage first optical splitter, the fourth port is allocated optical power greater than or equal to the optical power allocated to any one of the second port and the third port;

in each of the second optical splitters of the other stages except for the last stage of the second optical splitter, the optical power allocated to the eighth port is greater than or equal to the optical power allocated to any one of the sixth port and the seventh port.

7. The protection device of claim 6,

in each first optical splitter, the optical power distributed to the second port is equal to the optical power distributed to the third port;

in each second optical splitter, the optical power allocated to the sixth port is equal to the optical power allocated to the seventh port.

8. The protection device of claim 3, further comprising:

the first trunk optical fiber comprises an optical fiber line connected between the first OLT dual-mode optical module and the first optical splitter at the first stage and an optical fiber line connected between the first optical splitters;

the second trunk optical fiber comprises an optical fiber line connected between the second OLT dual-mode optical module and the first-stage second optical splitter and an optical fiber line connected between the second optical splitters;

a plurality of first distribution fibers, each first distribution fiber comprising a fiber line connected between the first optical splitter and a respective first optical network unit;

a plurality of second distribution fibers, each second distribution fiber comprising a fiber line connected between the second optical splitter and a respective second optical network unit;

a plurality of third distribution fibers, each third distribution fiber comprising a fiber line connected between the first optical splitter and a respective second optical network unit; and

a plurality of fourth distribution fibers, each fourth distribution fiber comprising a fiber line connected between the second optical splitter and a respective first optical network unit.

9. The protection device of claim 8,

the first optical network unit includes:

the first single-mode optical module is in communication connection with the second port of the corresponding first optical splitter and is configured to transmit information by adopting the first rate channel; and

the second single-mode optical module is in communication connection with a seventh port of the corresponding second optical splitter and is configured to transmit information by adopting the second rate channel;

the second optical network unit includes:

a third single-mode optical module, communicatively connected to a sixth port of the corresponding second optical splitter, configured to perform information transmission using the first rate channel; and

and the fourth single-mode optical module is in communication connection with the corresponding third port of the first optical splitter and is configured to transmit information by adopting the second rate channel.

10. A method of protecting a passive optical network link using the protection device of claim 9, comprising:

detecting each of the plurality of first distribution optical fibers; and

and under the condition that at least one first distribution optical fiber in the plurality of first distribution optical fibers is determined to be interrupted, the first optical network unit corresponding to the at least one first distribution optical fiber is switched from the adopted first rate channel to the second rate channel, and performs traffic information transmission with the second OLT dual-mode optical module through the second optical splitter.

11. The method of claim 10, further comprising:

detecting each of the plurality of second distribution optical fibers; and

and under the condition that at least one second distribution optical fiber in the plurality of second distribution optical fibers is determined to be interrupted, the second optical network unit corresponding to the at least one second distribution optical fiber is switched from the adopted first rate channel to the second rate channel, and performs service information transmission with the first OLT dual-mode optical module through the first optical splitter.

12. The method of claim 11, further comprising:

detecting the first trunk optical fiber; and

and under the condition that the first trunk optical fiber is determined to be interrupted, the first optical network unit is switched to the second speed channel from the adopted first speed channel, and performs service information transmission with the second OLT dual-mode optical module through the second optical splitter.

13. The method of claim 12, further comprising:

detecting the second trunk optical fiber; and

and under the condition that the second trunk optical fiber is determined to be interrupted, the second optical network unit is switched from the adopted first rate channel to the second rate channel, and performs service information transmission with the first OLT dual-mode optical module through the first optical splitter.

14. The method of any of claims 10 to 13, further comprising:

before each first distribution optical fiber is detected, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first single-mode optical module, the second single-mode optical module, the third single-mode optical module, and the fourth single-mode optical module are all in a working state, and the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first optical network unit, and the second optical network unit all adopt the first speed channel to transmit service information.

15. A protection device for a passive optical network link, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the method of any of claims 10-14 based on instructions stored in the memory.

16. A computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 10 to 14.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a protection device and a method for a passive optical network link.

Background

In the information application scenario of the industrial passive optical network, the related art has started to adopt the optical fiber communication network technology based on the passive optical network technology to implement service bearer. In order to improve network reliability and survivability, a link protection mechanism may be employed in a passive optical network system. Currently, a link protection mechanism in the related art may provide a service processing capability for an Optical network unit through an Optical Line Terminal (OLT) Optical module, and provide a link protection capability for the Optical network unit through another OLT Optical module

Disclosure of Invention

One technical problem that embodiments of the present disclosure solve is: a protection device for a passive optical network link is provided to realize the protection of the passive optical network link.

According to an aspect of the embodiments of the present disclosure, there is provided a protection apparatus for a passive optical network link, including: a first OLT dual-mode optical module configured to support a first rate channel and a second rate channel; a second OLT dual mode optical module configured to support the first rate channel and the second rate channel; the first passive optical network link is in communication connection with the first OLT dual-mode optical module and comprises a plurality of cascaded first optical splitters and a plurality of first optical network units, wherein the first optical splitter of each stage is connected with the first optical network unit at the same stage; the second passive optical network link is in communication connection with the second OLT dual-mode optical module and comprises a plurality of cascaded second optical splitters and a plurality of second optical network units, wherein the second optical splitter of each stage is connected with the second optical network unit at the same stage; each first optical splitter comprises a first port, a second port, a third port and a fourth port; a first port of the first optical splitter at the first stage is in communication connection with the first OLT dual-mode optical module, and a first port of the first optical splitter at the other stage except the first stage is in communication connection with the first optical splitter at the previous stage; the second port of each first optical splitter is in communication connection with the first optical network unit at the same level by using the first rate channel; the third port of each first optical splitter is in communication connection with a second optical network unit at the same level by using the second rate channel; the fourth port of each first optical splitter of the other stages except for the first optical splitter of the last stage is communicatively connected to the first optical splitter of the next stage; each second optical splitter comprises a fifth port, a sixth port, a seventh port and an eighth port; a fifth port of the second optical splitter at the first stage is in communication connection with the second OLT dual-mode optical module, and fifth ports of the second optical splitters at other stages except the first stage are in communication connection with the second optical splitter at the previous stage; the sixth port of each second optical splitter is in communication connection with a second optical network unit at the same level by using the first rate channel; the seventh port of each second optical splitter is in communication connection with the first optical network unit at the same level by using the second rate channel; the eighth port of each of the second optical splitters of the other stages except for the last-stage second optical splitter is communicatively connected to the second optical splitter of the next stage.

In some embodiments, the transmission rate of the second rate channel is less than the transmission rate of the first rate channel.

In some embodiments, the first rate channel is a primary rate channel and the second rate channel is a backup rate channel.

In some embodiments, the first OLT dual-mode optical module and the second OLT dual-mode optical module are both located in the same optical line terminal.

In some embodiments, the first OLT dual-mode optical module and the second OLT dual-mode optical module are located in different optical line terminals, respectively.

In some embodiments, in each of the first optical splitters of the other stages except for the last stage of the first optical splitter, the fourth port is allocated an optical power greater than or equal to an optical power allocated to any one of the second port and the third port; in each of the second optical splitters of the other stages except for the last stage of the second optical splitter, the optical power allocated to the eighth port is greater than or equal to the optical power allocated to any one of the sixth port and the seventh port.

In some embodiments, in each first optical splitter, the optical power allocated to the second port is equal to the optical power allocated to the third port; in each second optical splitter, the optical power allocated to the sixth port is equal to the optical power allocated to the seventh port.

In some embodiments, the protection apparatus for a passive optical network link further comprises: the first trunk optical fiber comprises an optical fiber line connected between the first OLT dual-mode optical module and the first optical splitter at the first stage and an optical fiber line connected between the first optical splitters; the second trunk optical fiber comprises an optical fiber line connected between the second OLT dual-mode optical module and the first-stage second optical splitter and an optical fiber line connected between the second optical splitters; a plurality of first distribution fibers, each first distribution fiber comprising a fiber line connected between the first optical splitter and a respective first optical network unit; and a plurality of second distribution fibers, each second distribution fiber comprising a fiber line connected between the second optical splitter and a respective second optical network unit; and a plurality of third distribution fibers, each third distribution fiber comprising a fiber line connected between the first optical splitter and a respective second optical network unit; and a plurality of fourth distribution fibers, each fourth distribution fiber comprising a fiber line connected between the second optical splitter and a respective first optical network unit.

In some embodiments, the first optical network unit comprises: the first single-mode optical module is in communication connection with the second port of the corresponding first optical splitter and is configured to transmit information by adopting the first rate channel; the second single-mode optical module is in communication connection with a seventh port of the corresponding second optical splitter and is configured to transmit information by adopting the second rate channel; the second optical network unit includes: a third single-mode optical module, communicatively connected to a sixth port of the corresponding second optical splitter, configured to perform information transmission using the first rate channel; and the fourth single-mode optical module is in communication connection with the corresponding third port of the first optical splitter and is configured to transmit information by adopting the second rate channel.

According to another aspect of the embodiments of the present disclosure, there is provided a method for protecting a passive optical network link by using the protection device, including: detecting each of the plurality of first distribution optical fibers; and under the condition that at least one first distribution optical fiber in the plurality of first distribution optical fibers is determined to be interrupted, the first optical network unit corresponding to the at least one first distribution optical fiber is switched to the second speed channel from the adopted first speed channel, and a third distribution optical fiber and the second OLT dual-mode optical module are used for carrying out service information transmission through the second optical splitter.

In some embodiments, the method for protecting a passive optical network link by using the protection device further includes: detecting each of the plurality of second distribution optical fibers; and under the condition that at least one second distribution optical fiber in the plurality of second distribution optical fibers is determined to be interrupted, the second optical network unit corresponding to the at least one second distribution optical fiber is switched to the second speed channel from the adopted first speed channel, and a fourth distribution optical fiber and the first OLT dual-mode optical module are used for carrying out service information transmission through the first optical splitter.

In some embodiments, the method for protecting a passive optical network link by using the protection device further includes: detecting the first trunk optical fiber; and under the condition that the first trunk optical fiber is determined to be interrupted, the first optical network unit is switched to the second speed channel from the adopted first speed channel, and performs service information transmission with the second OLT dual-mode optical module through the second optical splitter.

In some embodiments, the method for protecting a passive optical network link by using the protection device further includes: detecting the second trunk optical fiber; and under the condition that the second trunk optical fiber is determined to be interrupted, the second optical network unit is switched to the second speed channel from the adopted first speed channel, and performs service information transmission with the first OLT dual-mode optical module through the first optical splitter.

In some embodiments, the method for protecting a passive optical network link by using the protection device further includes: before each first distribution optical fiber is detected, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first single-mode optical module, the second single-mode optical module, the third single-mode optical module, and the fourth single-mode optical module are all in a working state, and the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first optical network unit, and the second optical network unit all adopt the first speed channel to transmit service information.

According to yet another aspect of the present disclosure, there is provided a protection apparatus for a passive optical network link, including: a memory; and a processor coupled to the memory, the processor configured to perform the method of any of the above embodiments based on instructions stored in the memory.

According to yet another aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method according to any one of the above embodiments.

In the protection device for the passive optical network link, both the first OLT dual-mode optical module and the second OLT dual-mode optical module support a first rate channel and a second rate channel; the first passive optical network link is in communication connection with the first OLT dual-mode optical module and comprises a plurality of cascaded first optical splitters and a plurality of first optical network units, wherein the first optical splitter of each stage is connected with the first optical network unit at the same stage; the second passive optical network link is in communication connection with the second OLT dual-mode optical module and comprises a plurality of cascaded second optical splitters and a plurality of second optical network units, wherein the second optical splitter of each stage is connected with the second optical network unit at the same stage; each first optical splitter is in communication connection with a first optical network unit at the same level by using a first rate channel and also in communication connection with a second optical network unit at the same level by using a second rate channel, and each second optical splitter is in communication connection with the first optical network unit at the same level by using a second rate channel in addition to the first rate channel. The protection device can realize the protection of the passive optical network link.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a protection device for a passive optical network link according to some embodiments of the present disclosure.

Fig. 2 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure.

Fig. 3 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure.

Fig. 4 is a flow diagram of a protection method for a passive optical network link according to some embodiments of the present disclosure.

Fig. 5 is a flow diagram of a protection method for a passive optical network link according to further embodiments of the present disclosure.

Fig. 6 is a flow diagram of a protection method for a passive optical network link according to further embodiments of the present disclosure.

Fig. 7 is a flow diagram of a protection method for a passive optical network link according to still further embodiments of the present disclosure.

Fig. 8 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure.

Fig. 9 is a schematic structural diagram of a protection device for a passive optical network link according to some further embodiments of the present disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic structural diagram of a protection device for a passive optical network link according to some embodiments of the present disclosure.

As shown in fig. 1, the protection device for a passive optical network link in this embodiment includes: a first OLT dual mode optical module 101, a second OLT dual mode optical module 102, a first passive optical network link, and a second passive optical network link.

The first OLT dual mode optical module 101 is configured to support a first rate channel and a second rate channel. It should be understood that the first OLT dual-mode optical module 101 may select to use the first rate channel and the second rate channel for information transmission at the same time, or may select to use one of the first rate channel and the second rate channel for information transmission. For example, the information may include service information, control and management information, and the like.

The second OLT dual mode optical module 102 is configured to support a first rate channel and a second rate channel. It should be understood that the second OLT dual-mode optical module 102 may choose to use the first rate channel and the second rate channel for information transmission at the same time, or may choose to use one of the first rate channel and the second rate channel for information transmission.

The first passive optical network link may be communicatively connected with the first OLT dual mode optical module 101. For example, the first passive optical network link may be communicatively connected to the first OLT dual mode optical module 101 through a first passive optical network port (not shown in the figure).

The first passive optical network link may comprise a plurality of first optical splitters 103 and a plurality of first optical network units 105 cascaded. The first optical splitter 103 of each stage may be connected to the first optical network unit 105 at the same stage, that is, the plurality of first optical splitters 103 are connected to the plurality of first optical network units 105 in one-to-one correspondence.

Each first optical splitter 103 may include a first port a, a second port b, a third port c, and a fourth port d. The first port a of the first optical splitter 103 at the first stage is communicatively connected to the first OLT dual-mode optical module 101. The first port a of the first optical splitter 103 at the other stage than the first stage is communicatively connected to the first optical splitter 103 at the upper stage. The second port b of each first optical splitter 103 is communicatively connected to the first optical network unit 105 at the same level using a first rate channel. The third port c of each first optical splitter 103 is communicatively connected to the second optical network unit 106 at the same peer using a second rate channel. The fourth port d of each first optical splitter 103 of the other stages except the last stage first optical splitter 103 is communicatively connected to the next stage first optical splitter 103.

The second passive optical network link may be communicatively coupled to the second OLT dual mode optical module 102. For example, the second passive optical network link may be communicatively coupled to the second OLT dual mode optical module 102 via a second passive optical network port (not shown).

The second passive optical network link may include a plurality of second optical splitters 104 and a plurality of second optical network units 106 in cascade. The second optical splitter 104 of each stage may be connected to the second optical network unit 106 at the same stage, that is, the plurality of second optical splitters 104 and the plurality of second optical network units 106 are connected in a one-to-one correspondence.

Each second optical splitter 104 may include a fifth port e, a sixth port f, a seventh port g, and an eighth port h. The fifth port e of the second optical splitter 104 at the first stage is communicatively connected to the second OLT dual-mode optical module 102. The fifth port e of the second optical splitter 104 at the other stage than the first stage is communicatively connected to the second optical splitter 104 at the upper stage. The sixth port f of each second optical splitter 104 is communicatively coupled to the second optical network unit 106 at the same level using a first rate channel. The seventh port g of each second optical splitter 104 is communicatively connected to the first optical network unit 105 at the same peer using a second rate channel. The eighth port h of each of the second optical splitters 104 of the other stages except the last-stage second optical splitter 104 is communicatively connected to the second optical splitter 104 of the next stage.

In the protection device for the passive optical network link, both the first OLT dual-mode optical module and the second OLT dual-mode optical module support a first rate channel and a second rate channel; the first passive optical network link is in communication connection with the first OLT dual-mode optical module and comprises a plurality of cascaded first optical splitters and a plurality of first optical network units, wherein the first optical splitter of each stage is connected with the first optical network unit at the same stage; the second passive optical network link is in communication connection with the second OLT dual-mode optical module and comprises a plurality of cascaded second optical splitters and a plurality of second optical network units, wherein the second optical splitter of each stage is connected with the second optical network unit at the same stage; each first optical splitter is in communication connection with a first optical network unit at the same level by using a first rate channel and also in communication connection with a second optical network unit at the same level by using a second rate channel, and each second optical splitter is in communication connection with the first optical network unit at the same level by using a second rate channel in addition to the first rate channel. The protection device can realize the protection of the passive optical network link.

The inventors of the present disclosure have noted that, in the related art, in the case where the OLT optical module providing the traffic processing capability normally operates, the OLT optical module providing the link protection capability is in an idle state. This may cause a problem of passive optical network resource waste.

In some embodiments, the first rate channel is a primary rate channel, and the second rate channel is a backup rate channel. For example, the first OLT dual-mode optical module 101 may use a first rate channel as an active rate channel and a second rate channel as a standby rate channel; the second OLT dual-mode optical module 102 may use the first rate channel as an active rate channel and the second rate channel as a standby rate channel.

Here, the active rate channel may be represented as a rate channel for information transmission, that is, a channel for performing relevant service processing. The backup rate lanes may be denoted as rate lanes for passive optical network link protection. For example, the active rate channel is used as an active link, which may be responsible for control and service, and is used to transmit service information and control and management information; the backup rate channel is used as a backup link, and can only be responsible for control and used for transmitting control and management information. In the case that the first rate channel cannot be used for information transmission, the first OLT dual-mode optical module 101 and the second OLT dual-mode optical module 102 can use the second rate channel for information transmission.

In the above embodiment, on the one hand, the first OLT dual-mode optical module 101 may use the first rate channel as an active rate channel to be communicatively connected to the first optical network unit 105 and perform information transmission, and the second OLT dual-mode optical module 102 may use the second rate channel as a standby rate channel to be communicatively connected to the first optical network unit 105. In this way, when the first OLT dual-mode optical module 101 and the first optical network unit 105 cannot communicate using the active rate channel, the second OLT dual-mode optical module 102 may transmit information to the first optical network unit 105 using the standby rate channel. On the other hand, the second OLT dual-mode optical module 102 may use the first rate channel as an active rate channel to be communicatively connected to the second optical network unit 106 and perform information transmission, and the first OLT dual-mode optical module 101 may use the second rate channel as a standby rate channel to be communicatively connected to the second optical network unit 106. In this way, when the second OLT dual-mode optical module 102 and the second optical network unit 106 cannot communicate using the active rate channel, the first OLT dual-mode optical module 101 may transmit information with the second optical network unit 106 using the standby rate channel.

It can also be understood that the first OLT dual-mode optical module 101 may provide service processing capability for the first optical network unit 105 and may also provide a link protection function for the second optical network unit 106, and the second OLT dual-mode optical module 102 may provide service processing capability for the second optical network unit 106 and may also provide a link protection function for the first optical network unit 105. Therefore, on the premise of realizing service bearing and link protection, the protection device of the embodiment of the disclosure can improve the resource utilization rate of the passive optical network, solve the problem of resource waste of the passive optical network in the related technology, protect the networking investment of operators, and reduce the corresponding service cost.

The protection device adopts a hand-in-hand cross protection mode. The optical network unit is used as an active link in the PON port of the protection group through the first rate channel, and is registered to another PON port in the protection group as a standby link through the second rate channel.

In some embodiments, the first rate channel and the second rate channel may be of the same type of rate channel. For example, the first rate channel and the second rate channel may both be rate channels corresponding to an EPON (Ethernet Passive Optical Network) and may also both be rate channels corresponding to a GPON (Gigabit-Capable Passive Optical Network).

In some embodiments, the transmission rate of the first rate channel and the transmission rate of the second rate channel may not be equal. For example, the transmission rate of the second rate channel may be less than the transmission rate of the first rate channel. For example, the first rate channel may correspond to a rate channel of an xg(s) -PON (e.g., 10G GPON). For example, the upstream transmission rate of 10G GPON may be 2.48832Gbit/s (bits per second) and the downstream transmission rate may be 9.95328 Gbit/s. For example, the second rate channel may correspond to a 1G GPON rate channel, with an upstream transmission rate of 1.244Gbit/s and a downstream transmission rate of 2.488 Gbit/s. Another example is: the first rate channel may correspond to a 10G EPON rate channel and the second rate channel may correspond to a 1G EPON rate channel.

In other embodiments, the transmission rate of the first rate channel may also be less than the transmission rate of the second rate channel. For example: the first rate channel may correspond to a rate channel of 1G GPON and the second rate channel may correspond to a rate channel of 10G GPON. Another example is: the first rate channel may correspond to a 1G EPON rate channel and the second rate channel may correspond to a 10G GPON rate channel.

Fig. 2 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure.

The following description focuses on differences between the protection device of the present embodiment and the above-described embodiments, and similar parts will not be repeated.

As shown in fig. 2, the first OLT dual-mode optical module 101 and the second OLT dual-mode optical module 102 may both be located in the same OLT 201.

In some embodiments, the first optical network unit 105 may include a first single mode optical module 202 and a second single mode optical module 203. The first single-mode optical module 202 is communicatively connected to the second port b of the corresponding first optical splitter 103. The first single-mode optical module 202 is configured to transmit information using a first rate channel. The second single-mode optical module 203 is communicatively connected to the seventh port g of the corresponding second optical splitter 104. The second single-mode optical module 203 is configured to transmit information using a second rate channel.

In some embodiments, second optical network unit 106 includes a third single mode optical module 204 and a fourth single mode optical module 205. The third single-mode optical module 204 is communicatively connected to the sixth port f of the corresponding second optical splitter 104. The third single-mode optical module 204 is configured to transmit information using a first rate channel. The fourth single-mode optical module 205 is communicatively connected to the third port c of the corresponding first optical splitter 103. The fourth single-mode optical module 205 is configured to transmit information using a second rate channel.

In some embodiments, each of the first optical network unit and the second optical network unit may further include a first MAC (Medium Access Control) chip 206, as shown in fig. 2. For example, the first MAC chip 206 can be coupled to and used with the first single mode optical module 202 and the second single mode optical module 203. For another example, the first MAC206 chip can be connected to and used with the third single-mode optical module 204 and the fourth single-mode optical module 205.

In other embodiments, each of the first optical network unit and the second optical network unit may further include a second MAC chip (not shown in the figures) and a third MAC chip (not shown in the figures). For example, a second MAC chip may be connected to and used with the first single-mode optical module 202; the third MAC chip can be connected to and used with the second single-mode optical module 203. For another example, the second MAC chip may be connected to and used with the third single-mode optical module 204; the third MAC chip may be connected to and used with the fourth single-mode optical module 205.

In the above embodiment, the first optical network unit and the second optical network unit each include two optical modules. The first optical network unit may perform service processing by using a first single-mode optical module communicatively connected to the first optical splitter, and may perform backup protection by using a second single-mode optical module communicatively connected to the second optical splitter. That is, the first optical network unit may further perform service communication through the second single-mode optical module under the condition that the first single-mode optical module cannot provide the service communication capability. The second optical network unit is similar to the first optical network unit. Therefore, the service operation of the optical network unit can be ensured, and the protection of the passive optical network link can be further realized.

In some embodiments, as shown in fig. 2, the link protection apparatus for a passive optical network further includes a first trunk fiber 207, a second trunk fiber 208, a plurality of first distribution fibers 209, a plurality of second distribution fibers 210, a plurality of third distribution fibers 211, and a plurality of fourth distribution fibers 212.

The first trunk optical fiber 207 may include an optical fiber line connected between the first OLT dual-mode optical module 101 and the first optical splitter 103 of the first stage and an optical fiber line connected between the respective first optical splitters 103.

The second trunk optical fiber 208 may include an optical fiber line connected between the second OLT dual-mode optical module 102 and the second optical splitter 104 of the first stage and an optical fiber line connected between the respective second optical splitters 104.

Each first distribution fiber 209 may comprise a fiber line connected between the first optical splitter 103 and the corresponding first optical network unit 105.

Each second distribution fiber 210 may include a fiber-optic line connected between the second optical splitter 104 and a respective second optical network unit 106.

Each third distribution fiber 211 may comprise a fiber line connected between the first optical splitter 103 and the corresponding second optical network unit 106.

Each fourth distribution fiber 212 may comprise a fiber-optic line connected between the second optical splitter 104 and a corresponding first optical network unit 105.

Fig. 3 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure.

In some embodiments, as shown in fig. 3, the first OLT dual mode optical module 101 and the second OLT dual mode optical module 102 may be located in different OLTs, respectively. For example, a first OLT dual mode optical module 101 may be located in one OLT 301 and a second OLT dual mode optical module 102 may be located in another OLT 302.

In some embodiments, in each of the first optical splitters of the other stages except for the last stage of the first optical splitter, the fourth port d is allocated an optical power greater than or equal to an optical power allocated to any one of the second port b and the third port c. In each of the second optical splitters of the other stages except for the last stage second optical splitter, the optical power allocated to the eighth port h is greater than or equal to the optical power allocated to any one of the sixth port f and the seventh port g. Therefore, the optical splitter of the embodiment of the present disclosure is an optical splitter with unequal optical power.

In some embodiments, in each first optical splitter, the second port b is allocated the same optical power as the third port c. In each second optical splitter, the optical power allocated to the sixth port f is equal to the optical power allocated to the seventh port g.

The following describes in detail a case where an optical signal is transmitted from an optical line terminal to an optical network unit.

For example, the optical signal power input to the first port a of the first optical splitter of the first stage may be 1 (i.e., the initial optical power), and the optical signal power input to the fifth port e of the second optical splitter of the first stage may be 1. When the optical signal passes through the first optical splitter, 1/n (n can be any integer greater than or equal to 3) optical power is distributed to the second port b and the third port c of the first optical splitter of the first stage, respectively, and 1- (2/n) optical power is distributed to the fourth port d of the first optical splitter of the first stage. Thus, an optical signal having 1/n optical power may be transmitted to the first optical network unit through the second port b, an optical signal having 1/n optical power may be transmitted to the second optical network unit through the third port c, and an optical signal having 1- (2/n) optical power may be transmitted to the next-stage first optical splitter through the fourth port d. The first port a of the first optical splitter of the subsequent second stage may redistribute the optical signal of 1- (2/n) optical power according to the power distribution rule of the first optical splitter of the first stage. The first optical splitters of the other stages may distribute the power of the optical signal in the same way as described above. The power distribution of the second optical splitter may refer to the power distribution of the first optical splitter, and a description thereof will not be repeated.

Fig. 4 is a flow diagram of a protection method for a passive optical network link according to some embodiments of the present disclosure.

The protection method of this embodiment adopts the protection device to protect the passive optical network link. The protection method includes steps S402 to S404.

In step S402, each of the plurality of first distribution optical fibers is detected. For example, each optical network unit has a detection mechanism for determining whether a link is broken, and may detect a corresponding distribution optical fiber to determine whether the distribution optical fiber is broken.

In step S404, when it is determined that at least one first distribution optical fiber of the plurality of first distribution optical fibers is broken, the first optical network unit corresponding to the at least one first distribution optical fiber is switched from the adopted first rate channel to the second rate channel, and performs traffic information transmission with the second OLT dual-mode optical module through the second optical splitter. It will also be appreciated that in case of a break in the first distribution fibre 209, the first optical network unit 105 will perform the relevant traffic handling via the corresponding fourth distribution fibre 212. That is, the first onu detects the working channel in real time, starts the standby channel in time after finding the interruption of the distribution optical fiber, and informs the OLT to start the protection switching.

In the above embodiment, with the protection device, when the first distribution optical fiber is interrupted, the first optical network unit may quickly switch the service to the second optical splitter, thereby ensuring normal service operation of the first optical network unit. Therefore, the method not only can realize the protection of the passive optical network link, but also can improve the resource utilization rate of the passive optical network, protect the networking investment of operators and reduce the corresponding service cost.

Fig. 5 is a flow diagram of a protection method for a passive optical network link according to further embodiments of the present disclosure. As shown in fig. 5, the protection method for the passive optical network link may further include steps S502 to S504.

In step S502, each of the plurality of second distribution optical fibers is detected.

In step S504, when it is determined that at least one second distribution optical fiber of the plurality of second distribution optical fibers is broken, the second optical network unit corresponding to the at least one second distribution optical fiber is switched from the adopted first rate channel to the second rate channel, and performs traffic information transmission with the first OLT dual-mode optical module through the first optical splitter. It will also be appreciated that in case of a break in the second distribution fibre 210, the second optical network unit 106 will perform the relevant traffic handling via the corresponding third distribution fibre 211. That is, the second onu detects the working channel in real time, starts the standby channel in time after finding the interruption of the distribution optical fiber, and informs the OLT to start the protection switching.

In the above embodiment, with the protection device, when the second distribution optical fiber is interrupted, the second optical network unit may quickly switch the service to the first optical splitter, thereby ensuring normal service operation of the second optical network unit. Therefore, the protection of the passive optical network link can be realized, and the resource utilization rate of the passive optical network can be improved.

Fig. 6 is a flow diagram of a protection method for a passive optical network link according to further embodiments of the present disclosure. As shown in fig. 6, the protection method for the passive optical network link may further include steps S602 to S604.

In step S602, a first trunk fiber is detected. For example, the OLT where the OLT dual-mode optical module is located has a detection mechanism for determining whether a link is interrupted, and may detect a trunk optical fiber corresponding to the OLT, so as to determine whether the trunk optical fiber is interrupted.

In step S604, when it is determined that the first trunk fiber is interrupted, the first optical network unit switches from the adopted first rate channel to a second rate channel, and performs service information transmission with the second OLT dual-mode optical module through the second optical splitter.

In the above embodiment, with the protection device, under the condition that the first trunk optical fiber is interrupted, all the first optical network units in the first passive optical network link may quickly switch the service to the corresponding first optical splitter, thereby ensuring normal service operation of all the first optical network units. Therefore, the protection of the passive optical network link can be realized, and the resource utilization rate of the passive optical network can be improved.

Fig. 7 is a flow diagram of a protection method for a passive optical network link according to still further embodiments of the present disclosure. As shown in fig. 7, the protection method for the passive optical network link may further include steps S702 to S704.

In step S702, the second trunk optical fiber is detected.

In step S704, in a case that it is determined that the second trunk fiber is interrupted, the second optical network unit switches from the adopted first rate channel to a second rate channel, and performs service information transmission with the first OLT dual-mode optical module through the first optical splitter.

In the above embodiment, with the protection device, under the condition that the second trunk optical fiber is interrupted, all the second optical network units in the second passive optical network link may quickly switch the service to the corresponding first optical splitter, thereby ensuring normal service operation of all the second optical network units. Therefore, the protection of the passive optical network link can be realized, and the resource utilization rate of the passive optical network can be improved.

In the above embodiment, the working channel and the standby channel of the OLT PON port in the protection group alternately perform link interruption detection, and discover interruption of the trunk fiber in time and implement protection switching to the standby PON port.

It should be noted that, with reference to the related art, specific detection mechanisms for the first distribution optical fiber, the second distribution optical fiber, the first trunk optical fiber and the second trunk optical fiber are not described in detail herein to avoid obscuring the main inventive points of the present disclosure.

In some embodiments, the protection method for the passive optical network link may further include the steps of: before each first distribution optical fiber is detected, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first single-mode optical module, the second single-mode optical module, the third single-mode optical module and the fourth single-mode optical module are all in a working state, and the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first optical network unit and the second optical network unit all adopt a first speed channel to transmit service information.

For example, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first optical network unit, and the second optical network unit are all in an on state. And the first optical network unit and the second optical network unit finish registration authentication on the OLT. Namely, a first single-mode optical module of a first optical network unit is registered and linked up to a first OLT dual-mode optical module, a second single-mode optical module of the first optical network unit is registered and linked up to a second OLT dual-mode optical module, a third single-mode optical module of the second optical network unit is registered and linked up to the first OLT dual-mode optical module, and a fourth single-mode optical module of the second optical network unit is registered and linked up to the second OLT dual-mode optical module. Therefore, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first single-mode optical module, the second single-mode optical module, the third single-mode optical module and the fourth single-mode optical module are all in a working state, the first OLT dual-mode optical module, the second OLT dual-mode optical module, the first single-mode optical module and the third single-mode optical module can transmit service information and control and management information by adopting a first speed channel, and the second single-mode optical module and the fourth single-mode optical module can transmit control and management information by adopting a second speed channel.

In the above embodiment, the first optical network unit not only maintains normal traffic communication with the first OLT dual-mode optical module, but also maintains communication connection with the second OLT dual-mode optical module. Under the condition that a first passive optical network link connected with a first OLT dual-mode optical module is interrupted, a first optical network unit can switch service to a second OLT dual-mode optical module connected with a second passive optical network link in time for processing, and time delay caused by link switching can be reduced. The second optical network unit is similar to the first optical network unit and will not be described again here.

Fig. 8 is a schematic structural diagram of a protection device for a passive optical network link according to further embodiments of the present disclosure. The protection apparatus for a passive optical network link includes a memory 810 and a processor 820. Wherein:

the memory 810 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in at least one corresponding embodiment of fig. 4-7.

Processor 820 is coupled to memory 810 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 820 is configured to execute instructions stored in the memory, so as to implement protection on a passive optical network link and improve the resource utilization rate of the passive optical network.

In one embodiment, as also shown in fig. 9, the protection apparatus 900 for a passive optical network link includes a memory 910 and a processor 920. Processor 920 is coupled to memory 910 by a BUS 930. The protection device 900 may also be connected to an external storage device 950 through a storage interface 940 for invoking external data, and may also be connected to a network or another computer system (not shown) through a network interface 960, which will not be described in detail herein.

In the embodiment, the data instruction is stored in the memory, and the instruction is processed by the processor, so that the protection of the passive optical network link can be realized, the resource utilization rate of the passive optical network can be improved, the networking investment of an operator is protected, and the corresponding service cost is reduced.

In another embodiment, the present disclosure also provides a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in at least one of the corresponding embodiments of fig. 4-7. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

The method and system of the present disclosure may be implemented in a number of ways. For example, the methods and systems of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.