CN102316392A - Method for realizing optical network unit (ONU) redundancy protection in fiber to the home (FTTH) network, apparatus and system thereof - Google Patents

Abstract

The invention provides a method, device and system for realizing ONU redundancy protection in an FTTH network. The system includes an OLT, an optical splitter, and an active ONU and a standby ONU connected to each user. When the OLT receives an equipment alarm , judging whether the device alarm type is the device alarm type that triggers ONU protection switching, when the device alarm type is the device alarm type that triggers ONU protection switching, then open the UNI of the backup ONU, and provide business services to users through the UNI of the backup ONU. Because in the present invention, the main ONU and the standby ONU are arranged on the user side, therefore, when the ONU on the user side has a problem, it can be switched to the standby state to ensure the realization and recovery of the business, thereby improving the security and reliability of the business .

Description

Method, device and system for realizing ONU redundancy protection in FTTH network

technical field

The present invention relates to the field of communication technology, in particular to a method, device and system for realizing redundancy protection of Optical Network Unit (ONU) in a Fiber to the Home (FTTH) network.

Background technique

With the continuous maturity of next-generation network technology, users have higher and higher requirements for network capacity, speed, quality and service. The FTTH network can meet various requirements of users and thus become the mainstream of next-generation bandwidth access applications. At present, a variety of protection technologies have been formed in the protection and security of FTTH networks. Optical link protection includes: TYPE-A protection, TYPE-B protection, TYPE-C protection and TYPE-D protection.

Figure 1 is a schematic diagram of the network structure of TYPE-A protection in the prior art optical link protection, two passive optical network (Passive Optical Network, PON) ports of the optical line terminal (optical line terminal, OLT) use a PON media access The control (Media Access Control, MAC) chip is connected to the first optical module and the second optical module through a 1:2 electric switch, and the first optical module and the second optical module are respectively connected to the first optical module through a 2:N optical splitter. PON ports in ~N ONUs, so as to realize the protection of the two PON ports in the OLT. This protection method is based on the protection technology between PON ports in the same PON board. In this protection technology, the standby OLT optical module is in a cold standby state, and is detected and switched by the OLT.

Figure 2 is a schematic diagram of the network structure of TYPE-B protection in the prior art optical link protection. The two PON ports of the OLT use independent PON MAC chips and optical modules respectively, and the optical module of the first PON port and the optical module of the second PON port The optical modules are respectively connected to the PON ports of the 1st to N ONUs through 2:N optical splitters, so as to realize the protection of the two PON ports in the OLT. This protection mode is a PON port protection mode within the same PON board and between different PON boards. The standby PON interface in the OLT is in the cold standby state. The entire switching process is completed by the OLT, and the OLT can ensure that the service information of the active PON port can be synchronously backed up to the standby PON port, so that the standby PON port can maintain the ONU during the protection switching process. The attributes of the business remain unchanged.

Figure 3 is a schematic diagram of the network structure of TYPE-C protection in the prior art optical link protection, OLT dual PON ports, dual optical modules in each ONU, main optical fiber, optical splitter (1:N) and branch optical fiber Dual-channel redundancy, the two optical modules of the ONU are connected to the active and standby PON ports of the OLT through an optical splitter. This protection method is a PON port protection method within the same PON board or between different PON boards. Both the active and standby PON ports of the OLT are in working state. Both the ONU and the OLT can detect the link status and decide whether to switch according to the link status. The OLT should be able to ensure that the service information of the active PON port can be synchronously backed up to the standby PON port, so that during the protection switching process, the standby PON port can maintain the service attributes of the ONU unchanged.

Figure 4 is a schematic diagram of the network structure of TYPE-D protection in the prior art optical link protection, OLT dual PON ports, dual optical modules in ONU dual PON ports, main optical fiber, optical splitter (1:N) and distribution optical fiber Dual-channel redundancy, the two PON ports of the ONU are respectively connected to the active and standby PON ports of the OLT through an optical splitter. This protection method is a PON port protection method within the same PON board or between different PON boards. . Both the active and standby PON ports of the OLT are working. The OLT should be able to ensure that the service information of the active PON port can be synchronously backed up to the standby PON port, so that the standby PON port can maintain the service attributes of the ONU during the protection switching process. In this protection mode, the ONU has two independent PON ports, which are registered to the two PON ports of the OLT respectively, and the two PON ports of the ONU work in a master state and a standby state. The ONU should be able to ensure that the service information of the active PON port can be synchronously backed up to the standby PON port, so that during the PON port switching process, the ONU can maintain the local service attributes unchanged, without the need for initial configuration and service attribute configuration of the ONU.

The above-mentioned FTTH network protection methods are all based on line and PON MAC level protection. 1+1 redundancy technology is implemented on optical fiber lines and PON MAC to realize line and trunk level protection. However, when the user's ONU is powered off, the ONU's user network interface (UNI) fails, the optical fiber is disconnected, or the ONU fails or is damaged, the service cannot be protected and restored.

Contents of the invention

The invention provides a method, a device and a system for realizing ONU redundancy protection in an FTTH network, which are used to solve the problem in the prior art that services cannot be protected and restored when a problem occurs in a user's ONU.

The invention provides a system for realizing redundant protection of optical network unit ONU in a fiber-to-the-home FTTH network, characterized in that in the system: an optical line terminal OLT, a 1:N optical splitter and a main Use ONU and standby ONU;

The OLT determines whether a device alarm is received, and when receiving a device alarm, judges whether the device alarm type is the device alarm type that triggers ONU protection switching, and when the device alarm type is the device alarm type that triggers ONU protection switching, Open the user network interface of the standby ONU, and provide business services for users through the user network interface of the standby ONU;

The standby ONU provides business services for the user when the user network interface is opened.

The present invention provides a kind of method of optical network unit ONU redundancy protection in a kind of fiber to the home FTTH network, it is characterized in that, in said method, active ONU and backup ONU are connected with user respectively, and this method comprises:

Determine whether to receive a device alarm;

When receiving a device alarm, determine whether the device alarm type is the device alarm type that triggers ONU protection switching;

When the device alarm type is the device alarm type that triggers ONU protection switching, open the user network interface of the standby ONU, and provide business services for users through the user network interface of the standby ONU.

The present invention provides a kind of device that realizes optical network unit ONU redundant protection in a kind of fiber to the home FTTH network, it is characterized in that, described device comprises:

Judging module, used to judge whether to receive equipment warning; When receiving equipment warning, judge whether the equipment warning type is the equipment warning type that triggers ONU protection switching;

The switching module is used to open the user network interface of the standby ONU when the equipment alarm type is the equipment alarm type that triggers ONU protection switching, and provide business services for users through the user network interface of the standby ONU.

The invention provides a method, device and system for realizing ONU redundancy protection in an FTTH network. The system includes an OLT, an optical splitter, and an active ONU and a standby ONU connected to each user. When the OLT receives an equipment alarm , determine whether the equipment alarm type is the equipment alarm type that triggers ONU protection switching, and when the equipment alarm type is the equipment alarm type that triggers ONU protection switching, then open the UNI of the standby ONU, and provide business services to users through the UNI of the standby ONU. Because in the present invention, the main ONU and the standby ONU are arranged on the user side, therefore, when the ONU on the user side has a problem, it can be switched to the standby state to ensure the realization and recovery of the business, thereby improving the security and reliability of the business .

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic diagram of the networking structure of TYPE-A protection in the prior art optical link protection;

FIG. 2 is a schematic diagram of a network structure of TYPE-B protection in the prior art optical link protection;

3 is a schematic diagram of a network structure of TYPE-C protection in the prior art optical link protection;

FIG. 4 is a schematic diagram of a network structure of TYPE-D protection in the prior art optical link protection;

Fig. 5 realizes the system networking structural representation of ONU redundant protection in this FTTH network provided by the present invention;

Fig. 6 realizes the system networking structure diagram of ONU redundancy protection in another kind of FTTH network provided by the present invention;

Fig. 7 is the process based on the ONU redundancy protection that the networking structure of above-mentioned Fig. 5 and Fig. 6 realizes;

FIG. 8 is a schematic structural diagram of a device for implementing ONU redundancy protection in a fiber-to-the-home FTTH network provided by the present invention.

Detailed ways

The present invention provides a method, a device and a system for realizing ONU redundancy protection in an FTTH network in order to realize the restoration of business guarantee business and improve the reliability and security of business when a problem occurs in the ONU at the user side.

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Fig. 5 is the system networking structural diagram that realizes ONU redundant protection in this FTTH network provided by the present invention, comprises in this system: OLT, 1: N optical splitter and the active ONU that is connected with each user and standby ONU .

The PON port in the OLT in this system is respectively connected to the PON port of the active ONU and the PON port of the standby ONU through a 1:N optical splitter, and the active ONU and the standby ONU are respectively connected to the terminal of the same user.

In this networking structure, both the active ONU and the standby ONU connected to the terminal of the same user are in the working state. In order to ensure that the subsequent service attributes can be maintained during the protection switching process, the OLT of the present invention saves The configured information of the active ONU and the standby ONU. The information of the configured active ONU and the standby ONU are consistent.

Fig. 6 is a schematic diagram of the system networking structure that realizes ONU redundancy protection in another kind of FTTH network provided by the present invention, comprises in this system: OLT, 1: N optical splitter and the active ONU that is connected with each user and Standby ONU.

The system adopts dual PON ports based on ONU-level protection technology. The OLT has dual PON ports. Two ONUs are used, namely the main ONU and the backup ONU. The main ONU and the backup ONU are connected to the same user. Optical splitters and distribution fibers are dual redundant. In this networking system, the main PON port and the backup PON port inside the OLT are respectively connected to the PON port of the main ONU and the PON port of the backup ONU connected to each user through a 1:N optical splitter.

In this networking structure, both the active ONU and the standby ONU connected to the terminal of the same user are in working state. In order to ensure that the subsequent service attributes can be maintained during the protection switching process, the OLT of the present invention The service information in the active PON port is synchronized to the standby PON port, and the active PON port and the standby PON port are configured with the information of the active ONU and the standby ONU, and the information of the configured active ONU and the standby ONU is consistent.

Fig. 7 is the process based on the ONU redundancy protection that the networking structure of above-mentioned Fig. 5 and Fig. 6 realizes, and this process comprises the following steps:

S701: Redundancy protection starts.

S702: Judging whether a device alarm is received, if it is judged that a device alarm is received, go to step S703, otherwise, go to step S702.

S703: Determine whether the device alarm type is the device alarm type that triggers ONU protection switching. When the device alarm type is the device alarm type that triggers ONU protection switching, go to step S704; otherwise, go to step S702.

S704: Open the user network interface of the standby ONU, and provide business services for users through the user network interface of the standby ONU.

Moreover, when the standby ONU provides business services for users, it can be considered that the standby ONU becomes the active ONU at this time. Since the active ONU does not provide business services for users at this time, it can be considered that the active ONU is the standby ONU at this time. The method for implementing ONU redundancy protection is the same as the above method.

Specifically, in the present invention, the device alarm type that triggers ONU protection switching includes:

Optical line terminal OLT passive optical network PON port signal loss alarm, active ONU power failure alarm, active ONU fiber cut alarm and active ONU user network interface failure alarm.

Fig. 8 is a schematic structural diagram of a device for implementing optical network unit ONU redundancy protection in a fiber-to-the-home FTTH network provided by the present invention, the device comprising:

Judging module 81, is used for judging whether to receive equipment alarm; When receiving equipment alarm, judge whether this equipment alarm type is the equipment alarm type that triggers ONU protection switching;

The switching module 82 is used to open the user network interface of the standby ONU when the equipment alarm type is the equipment alarm type that triggers ONU protection switching, and provide business services for users through the user network interface of the standby ONU.

The switching module 82 is specifically used to determine that the alarm type of the equipment is an alarm for signal loss at the passive optical network PON port of the optical line terminal OLT, an alarm for power failure of the main ONU, an alarm for fiber breakage of the main ONU, or a user network interface of the main ONU In case of a fault alarm, open the user network interface of the standby ONU, and provide business services for users through the user network interface of the standby ONU.

Specifically, the device may be located in the OLT.

The invention provides a method, device and system for realizing ONU redundancy protection in an FTTH network. The system includes an OLT, an optical splitter, and an active ONU and a standby ONU connected to each user. When the OLT receives an equipment alarm , determine whether the equipment alarm type is the equipment alarm type that triggers ONU protection switching, and when the equipment alarm type is the equipment alarm type that triggers ONU protection switching, then open the UNI of the standby ONU, and provide business services to users through the UNI of the standby ONU. Because in the present invention, the main ONU and the standby ONU are arranged on the user side, therefore, when the ONU on the user side has a problem, it can be switched to the standby state to ensure the realization and recovery of the business, thereby improving the security and reliability of the business .

The above description shows and describes a preferred embodiment of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications, and environments can be made within the scope of the inventive concept described herein, by the above teachings or by skill or knowledge in the relevant field. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

Claims (10)

1. realize the system of optical network unit ONU redundancy protecting in the fiber-to-the-home FTTH network, it is characterized in that, in the said system: optical line terminal OLT, 1:N optical branching device and leading of being connected with each user with ONU and subsequent use ONU;

Said OLT; Judge whether to receive equipment alarm; When receiving equipment alarm, judge whether this equipment alarm type is to trigger ONU to protect the equipment alarm type of switching, when this equipment alarm type is when triggering the equipment alarm type of ONU protection switching; Open the User Network Interface of subsequent use ONU, the User Network Interface through this subsequent use ONU provides business service for the user;

Said subsequent use ONU is when User Network Interface is opened, for the user provides business service.

2. the system of claim 1; It is characterized in that said OLT is the passive optical-fiber network PON mouth loss of signal alarm of optical line terminal OLT at the judgment device alarm type; The main ONU alarm for power-off of using; Main with the disconnected fine alarm of ONU or main during with the fault warning of ONU User Network Interface, open the User Network Interface of subsequent use ONU, the User Network Interface through this subsequent use ONU provides business service for the user.

3. the system of claim 1 is characterized in that, said OLT, its inner passive optical-fiber network PON mouth are connected to the main PON mouth with ONU and subsequent use ONU that is connected with each user through the 1:N optical branching device.

4. system as claimed in claim 3 is characterized in that, in the said system,

Said OLT preserves the main information with ONU and subsequent use ONU that disposes, and wherein configuration is main consistent with the information of ONU and subsequent use ONU.

5. the system of claim 1 is characterized in that, said OLT, its inner master are connected to the main PON mouth with ONU and subsequent use ONU that is connected with each user with passive optical-fiber network PON mouth and subsequent use PON mouth through 1:N optical branching device correspondence.

6. system as claimed in claim 5; It is characterized in that; Said OLT; Said master is synchronized to subsequent use PON mouth with the business information in the PON mouth, and it is said main with disposing main information with ONU and subsequent use ONU in PON mouth and the subsequent use PON mouth, and wherein configuration is main consistent with the information of ONU and subsequent use ONU.

7. realize the method for optical network unit ONU redundancy protecting in the fiber-to-the-home FTTH network, it is characterized in that mainly in the said method be connected with the user respectively with subsequent use ONU with ONU, this method comprises:

Judge whether to receive equipment alarm;

When receiving equipment alarm, judge whether this equipment alarm type is to trigger the equipment alarm type that the ONU protection is switched;

When this equipment alarm type during for the equipment alarm type that triggers the ONU protection and switch, open the User Network Interface of subsequent use ONU, the User Network Interface through this subsequent use ONU provides business service for the user.

8. method as claimed in claim 7 is characterized in that, the equipment alarm type that said triggering ONU protection is switched comprises:

The passive optical-fiber network PON mouth loss of signal alarm of optical line terminal OLT, the main ONU alarm for power-off of using, main with the disconnected fine alarm of ONU and main with the fault warning of ONU User Network Interface.

9. realize the device of optical network unit ONU redundancy protecting in the fiber-to-the-home FTTH network, it is characterized in that said device comprises:

Judge module is used to judge whether to receive equipment alarm; When receiving equipment alarm, judge whether this equipment alarm type is to trigger the equipment alarm type that the ONU protection is switched;

Handover module is used for opening the User Network Interface of subsequent use ONU when this equipment alarm type during for the equipment alarm type that triggers the ONU protection and switch, and the User Network Interface through this subsequent use ONU provides business service for the user.

10. device as claimed in claim 9; It is characterized in that, said handover module, specifically being used for working as the judgment device alarm type is the passive optical-fiber network PON mouth loss of signal alarm of optical line terminal OLT; The main ONU alarm for power-off of using; Main with the disconnected fine alarm of ONU or main during with the fault warning of ONU User Network Interface, open the User Network Interface of subsequent use ONU, the User Network Interface through this subsequent use ONU provides business service for the user.

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