WO2011160366A1

WO2011160366A1 - Method, equipment and optical line terminal for restarting optical network unit

Info

Publication number: WO2011160366A1
Application number: PCT/CN2010/077875
Authority: WO
Inventors: 徐群立
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-21
Filing date: 2010-10-19
Publication date: 2011-12-29
Also published as: CN101873519B; CN101873519A

Abstract

A method, equipment and Optical Line Terminal (OLT) for restarting an Optical Network Unit are provided by the present invention. The method includes: an OLT sends a Physical Layer Operations Administration and Maintenance (PLOAM) message to an Optical Network Unit (ONU), the type of the message is marked as restarting, and the information, which indicates the ONU needing to be restarted, is carried; the ONU analyzes the message after receiving the PLOAM message, and if the type of the message is restarting, determines whether said ONU itself needs to be restarted according to the information that indicates the ONU needing to be restarted, if yes, then restart. The present invention provides a method for restarting the ONU using the PLOAM message, which is an expansion for the prior restarting method, and under the condition that ONUs are allocated dispersedly, the effective restarting method for the fault diagnosis and the fault treatment of ONU is provided, thus improving the efficiency of fault treatment and saving the labor and material resources for maintenance.

Description

Method, device and optical line terminal for restarting optical network unit

Technical field

The present invention relates to the field of Passive Optical Networks (PON) communication, and in particular, to a method, a device, and an Optical Line Termination (OLT) for restarting an optical network unit. Background technique

In Gigabit-Capable Passive Optical Networks (GPON) communication, the OLT establishes an optical network unit management control interface (ONU Management and Control Interface, OMCI) with an Optical Network Unit (ONU). ) Channel, to achieve management and control of the ONU.

The OMCI message for the OLT to restart the ONU is specified in the ITU-T Rec. G.984.4 standard. When the OLT needs to restart a specific ONU, the OLT sends an OMCI message requesting the restart to the ONU. After receiving the OMCI message requesting the restart, the ONU receives the OMCI message. Perform a restart action.

As can be seen from the above description, the OLT needs two prerequisites to restart the ONU:

(1) The OMCI channel of the ONU and OLT is normal.

The OMCI channel needs to be properly registered in the ONU and can be established after the ONU reaches the 05 operating state.

(2) The ONU can normally respond to the OMCI message requesting to restart.

The ONU can respond normally. The premise of the OMCI message is: The OMCI function module and the messaging module work normally.

In actual use, the ONU sometimes fails to reach the 05 state after power-on, but stays in the 02-04 state. Even in the 05 state, the OMCI function module may be abnormal due to long-term operation, and cannot respond to the OMCI message. In the above case, the ONU cannot be restarted on the OLT side, and must be processed at the ONU distribution point, wasting human and material resources.

Summary of the invention The technical problem to be solved by the present invention is to provide a method and a device for restarting an optical network unit. When the OLT cannot restart the ONU by using the OMCI method, the ONU is restarted.

To solve the above technical problem, a method for restarting an optical network unit according to the present invention includes:

The optical line terminal (OLT) sends physical layer operation management and maintenance to the optical network unit (ONU)

(PLOAM) message, marking the message type as restart in the PLOAM message, and carrying information indicating the ONU that needs to be restarted;

After receiving the PLOAM message, the ONU parses the PLOAM message. If the type of the PLOAM message is restarted, it determines whether it needs to be restarted according to the information indicating the ONU that needs to be restarted, and if necessary, restarts.

Before the step of sending the PLOAM message, the method further includes: if the OLT has learned the identifier of the ONU that needs to be restarted, the identifier of the ONU is recorded in the ONU identifier field of the PLOAM message, and the PLOAM message is sent to the ONU that needs to be restarted;

The information indicating the ONU that needs to be restarted includes: information indicating that the ONU compares its own sequence number (SN) with the SN carried in the PLOAM message and the SN of the ONU that needs to be restarted.

Before the step of sending the PLOAM message, the method further includes: if the OLT does not know the identifier of the ONU that needs to be restarted, set the ONU identifier field of the PLOAM message to be invalid, and send the PLOAM message to the next by using the broadcast mode. All ONUs;

The information indicating the ONU that needs to be restarted includes: indicating that the ONU has its own SN and

The information carried by the SN carried in the PLOAM message and the SN of the ONU that needs to be restarted.

The step of the ONU determining whether it needs to be restarted according to the information indicating the ONU that needs to be restarted includes:

After parsing the information indicating that the ONU compares its own SN with the SN carried in the PLOAM message, the ONU parses the carried SN from the PLOAM message, compares the parsed SN with its own SN, and if they are the same, performs the same Restart; otherwise, discard the PLOAM message.

Before the step of sending the PLOAM message, the method further includes: if the OLT restarts all the ONUs under the OLT, the PLOAM message is sent to all of the following by broadcast ONU;

The information indicating the ONU that needs to be restarted includes: information indicating that the ONU is restarted;

After the ONU receives the PLOAM message, the parsing step is: After parsing the information indicating that the ONU is restarted, restarting is performed.

The OLT marks the message type as Restart in the Message ID field of the PLOAM message.

The present invention also provides an apparatus for restarting an optical network unit, comprising: a restart control module and a restart execution module, the restart control module is disposed in an optical line terminal (OLT), and the restart execution module is disposed in an optical network unit (ONU) Medium, where:

The restart control module is set to: Send physical layer operation management and maintenance to the restart execution module.

(PLOAM) message, marking the message type as restarting in the PLOAM message, and carrying the information indicating the ONU that needs to be restarted;

The restart execution module is configured to: after receiving the PLOAM message, parse the PLOAM message, and if the type of the PLOAM message is restarted, determine, according to the information indicating the ONU that needs to be restarted, whether the ONU needs to be restarted, if necessary, Restart the ONU.

The restart control module is further configured to: if the identifier of the ONU that needs to be restarted is obtained, record the identifier of the ONU to the ONU identifier field of the PLOAM message, and send the PLOAM message to the restart execution module;

The information indicating the ONU that needs to be restarted includes: information indicating that the serial number (SN) of the ONU is compared with the SN carried in the PLOAM message, and the SN of the ONU that needs to be restarted.

The restart control module is further configured to: if the identifier of the ONU that needs to be restarted is not known, set the ONU identifier field of the PLOAM message to be invalid, and send the PLOAM message to the restarting of all the ONUs in the broadcast mode. Module

The information indicating the ONU that needs to be restarted includes: information indicating that the SN of the ONU is compared with the SN carried in the PLOAM message, and the SN of the ONU that needs to be restarted.

The restart control module is further configured to: if the all ONUs under the restart are restarted, the PLOAM message is sent to the restart execution module of all the ONUs in the broadcast mode;

The information indicating the ONU that needs to be restarted includes: information indicating that both are restarted. The present invention also provides an optical line terminal (OLT) for restarting an optical network unit, where the OLT includes a restart control module.

The restart control module is configured to: send physical layer operation management and maintenance to the restart execution module.

The restart execution module is disposed in an optical network unit (ONU), and the restart execution module parses the PLOAM message after receiving the PLOAM message, and if the type of the PLOAM message is restart, restarting according to the pair The ONU performs the indicated information to determine whether the ONU to which it belongs needs to be restarted, and if necessary, restarts the ONU.

The restart control module is further configured to: if the identifier of the ONU that needs to be restarted is known,

The identifier of the ONU is recorded in the ONU identifier field of the PLOAM message, and the PLOAM message is sent to the restart execution module.

The restart control module is further configured to: if the identifier of the ONU that needs to be restarted is not known, set the ONU identifier field of the PLOAM message to be invalid, and send the PLOAM message to all ONUs under the broadcast mode. Restart execution module in ;

The restart control module is further configured to: if the all ONUs in the OLT are restarted, send the PLOAM message to the restart execution module of all ONUs under the OLT by using a broadcast manner;

The information indicating the ONU that needs to be restarted includes: information indicating that both are restarted. In summary, the present invention utilizes the ONU in the case where the OMCI mode restarts the ONU.

The 02 to 05 state can receive the physical layer operation management and maintenance (PLOAM) message mechanism, and provides a method for restarting the ONU by using the PLOAM message. It is an extension of the existing restart method and is distributed in the ONU. conditions of The utility model provides an effective restart method for fault diagnosis and processing of the ONU, improves the efficiency of fault processing, and saves manpower and material resources for maintenance. BRIEF abstract

1 is a flowchart of a method for restarting an optical network unit according to an embodiment of the present invention;

2 is a block diagram of an apparatus for restarting an optical network unit according to the embodiment. Preferred embodiment of the invention

In this embodiment, the PLOAM message that the ONU can receive in the 02 to 05 state is extended to control the ONU restart. The PLOAM message is extended on both sides of the OLT and the ONU. When the OLT needs to restart the ONU, the OLT sends a PLOAM message to restart the ONU. After receiving the PLOAM message requesting the restart, the ONU determines whether it is required to restart itself. If yes, Call the interface to restart.

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings:

FIG. 1 is a method for restarting an optical network unit according to the embodiment, including:

101: Perform unified extension of PLOAM messages on the OLT and ONU sides;

The OLT and ONU sides must agree on the extension of the PLOAM message. The PLOAM message format is as shown in Table 1, which has 13 bytes.

Data 6 8

Data 7 9

Data 8 10

Data 9 11

Data 10 12

CRC 13

Table 1

The first byte is the ONU ID field, which is used to record the identity of the destination ONU. The identifier of the ONU is the address of the ONU. If the OLT has been notified of the identity of the ONU that needs to be restarted, the ID of the ONU is recorded in the ONU ID field.

If the ONU fails, the OLT has not established communication with the failed ONU. If the ONU does not report the identity, the PLOAM message can be sent to all ONUs under the OLT in broadcast mode. At this time, the ONU ID is invalid (FFFF).

The second byte is the Message ID field, which is the identifier of the PLOAM message. It is used to distinguish the message type. In this embodiment, the message ID is equal to 0x82, indicating that the message type is restart.

The third to eleventh bytes carry information indicating the ONU that needs to be restarted, wherein: the third byte is Data 1 and is defined as follows:

0x00: Discard the message without any processing;

0x01: is information indicating that the ONU compares its own SN with the serial number (SN) carried in the PLOAM message, and compares whether the 8 bytes of Data 2~Data 9 match their own SN, and if they match, it indicates Need to restart the ONU, restart immediately; otherwise, discard the PLOAM message;

OxFF: Ignore all the following bytes, which is information indicating that the ONU is restarting. After receiving this message, the ONU restarts immediately.

The fourth to eleventh bytes are Data 2 to Data9, and the eight bytes are used to store the SN of the ONU that needs to be restarted when Data 1 is equal to 0x01; The twelfth byte is Data 10, reserved, and is not used in this embodiment.

The thirteenth byte is the Cyclic Redundancy Check (CRC).

102: When the OLT side needs to restart the ONU, if the OMCI mode is invalid, the PLOAM message is constructed, and the message type is restarted in the message, and the ONU that needs to be restarted is indicated;

Invalid OMCI mode includes: OMCI channel exception and ONU cannot respond to OMCI messages.

If a specific ONU needs to be restarted, the OLT sets Data 1 to 0x01 and Data 2 to Data 9 to save the SN of the ONU to be restarted when constructing the PLOAM message; if the OLT wants to restart all ONUs under it, Set Data 1 to OxFF and then send a PLOAM message to the ONU below it.

103: After receiving the PLOAM message, the ONU parses the PLOAM message. If the PLOAM message indicates that the ONU is restarted, the ONU restarts.

The ONU side performs message parsing after receiving the PLOAM message. If the Message ID is equal to 0x82, indicating that the message type is restart, then the value of Data 1 is determined. If it is equal to 0x01, the SN in Data 2 to Data 9 and its own SN are compared. If they are consistent, call the restart interface to restart immediately. If they are inconsistent, discard the message and do not process it. If the value of Data 1 is equal to OxFF, immediately call the restart interface to restart.

When the optical path between the ONU and the OLT is normal, the ONU may be in any of 02 to 05, and the ONU processes the received PLOAM message in any state from 02 to 05.

2 is a device for restarting an optical network unit according to the embodiment, including: a restart control module and a restart execution module, the restart control module is set in the OLT, and the restart execution module is set in the ONU, where:

And a restart control module, configured to send a PLOAM message to the restart execution module, where the message type is restarted, and the information indicating the ONU that needs to be restarted is carried;

If the restart control module has obtained the identifier of the ONU that needs to be restarted, the identifier of the ONU is recorded in the ONU identifier field of the PLOAM message, and the PLOAM message is sent to the restart execution module. The information indicating the ONU that needs to be restarted includes: ONU serial number (SN) and The SN carried in the PLOAM message compares the information and the SN of the ONU that needs to be restarted. If the restart control module does not know the identity of the ONU that needs to be restarted, the ONU identifier field of the PLOAM message is set to be invalid, and the PLOAM message is sent to the restart execution module in all the ONUs under the broadcast mode; The information indicating by the ONU includes: information indicating that the SN of the ONU is compared with the SN carried in the PLOAM message and the SN of the ONU that needs to be restarted.

If the restart control module restarts all the ONUs, the PLOAM message is sent to the restarting module of all the ONUs in the broadcast mode; the information indicating the ONU that needs to be restarted includes: .

The execution module is restarted. After receiving the PLOAM message, the message is parsed. If the type of the message is restarted, it is determined whether the ONU needs to be restarted according to the information indicating the ONU that needs to be restarted. If necessary, the ONU is restarted. After parsing the information indicating that the SN of the ONU is compared with the SN carried in the PLOAM message, the ONU parses the carried SN from the PLOAM message, compares the parsed SN with its own SN, and if it is the same, restarts the ONU. Otherwise, the PLOAM message is discarded. After parsing the information indicating that the ONU is restarting, restart the ONU.

One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

INDUSTRIAL APPLICABILITY The present invention provides a mechanism for receiving an ONO message by using an ONU in a state of 02 to 05 when the OMCI mode restarts the ONU, and provides an extension of the existing restart method by using a PLOAM message to restart the ONU. Under the condition of distributed arrangement of ONU, it provides an effective restart method for fault diagnosis and processing of ONU, which improves the efficiency of fault handling and saves manpower and material resources for maintenance.

Claims

Claim

A method for restarting an optical network unit, comprising:

The optical line terminal (OLT) sends a physical layer operation management and maintenance (PLOAM) message to the optical network unit (ONU), and marks the message type as restarting in the PLOAM message, and carries information indicating the ONU that needs to be restarted;

After receiving the PLOAM message, the ONU parses the PLOAM message. If the type of the PLOAM message is restarted, it determines whether it needs to be restarted according to the information indicating the ONU that needs to be restarted, and if necessary, restarts. .

2. The method of claim 1 wherein

Before the step of sending the PLOAM message, the method further includes: if the OLT has learned the identifier of the ONU that needs to be restarted, the identifier of the ONU is recorded in the ONU identifier field of the PLOAM message, and the PLOAM message is sent. Giving the ONU that needs to be restarted;

The information indicating the ONU that needs to be restarted includes: information indicating that the ONU compares its own sequence number (SN) with the SN carried in the PLOAM message, and the SN of the ONU that needs to be restarted.

3. The method of claim 1, wherein

Before the step of sending the PLOAM message, the method further includes: if the OLT does not know the identifier of the ONU that needs to be restarted, setting the ONU identifier field of the PLOAM message to be invalid, and using the broadcast mode to the PLOAM The message is sent to all the ONUs in the OLT; the information indicating the ONU that needs to be restarted includes: information indicating that the ONU compares its own SN with the SN carried in the PLOAM message, and the SN of the ONU that needs to be restarted. .

The method according to claim 2 or 3, wherein the step of determining, by the ONU, whether the ONU needs to be restarted according to the information indicating the ONU that needs to be restarted includes:

After parsing the information indicating that the ONU compares its own SN with the SN carried in the PLOAM message, the ONU parses the carried SN from the PLOAM message, and parses the SN and its own SN. For comparison, if they are the same, restart; otherwise, the PLOAM message is discarded.

5. The method of claim 1, wherein

Before the step of sending the PLOAM message, the method further includes: if the OLT restarts all of its own ONUs, the PLOAM message is sent to all ONUs under the OLT by means of broadcast;

The information indicating the ONU that needs to be restarted includes: information indicating that the ONUs are all restarted; after the ONU receives the PLOAM message, the parsing step is: after parsing the information indicating that the ONUs are restarted, Restart.

6. The method of claim 1, wherein

A device for restarting an optical network unit, comprising: a restart control module and a restart execution module, wherein the restart control module is disposed in an optical line terminal (OLT), and the restart execution module is disposed in an optical network unit (ONU) Medium, where:

The restart control module is configured to: send a physical layer operation management and maintenance (PLOAM) message to the restart execution module, and mark the message type as restarting in the PLOAM message, and carry information indicating the ONU that needs to be restarted;

The restart execution module is configured to: after receiving the PLOAM message, parse the PLOAM message, and if the type of the PLOAM message is restarted, determine, according to the information indicating the ONU that needs to be restarted, whether the ONU belongs to Restart, if necessary, restart the ONU

8. The apparatus according to claim 7, wherein

The information indicating the ONU that needs to be restarted includes: indicating a serial number of the ONU

(SN) The information to be compared with the SN carried in the PLOAM message and the SN of the ONU that needs to be restarted.

9. The apparatus according to claim 7, wherein The restart control module is further configured to: if the identifier of the ONU that needs to be restarted is not known, set the ONU identifier field of the PLOAM message to be invalid, and send the PLOAM message to all ONUs under the broadcast mode. Restart execution module in ;

10. The apparatus according to claim 7, wherein

The information indicating the ONU that needs to be restarted includes: information indicating that both are restarted.

11. An optical line terminal (OLT) for restarting an optical network unit, the OLT comprising a restart control module,

The restart control module is configured to: send a physical layer operation management and maintenance (PLOAM) message to the restart execution module, mark the message type as restarting in the PLOAM message, and carry information indicating the ONU that needs to be restarted;

The OLT according to claim 11, wherein the restart control module is further configured to: if the identifier of the ONU that needs to be restarted is known, record the identifier of the ONU to the ONU identifier field of the PLOAM message, and Sending the PLOAM message to the restart execution module;

The OLT according to claim 11, wherein the restart control module is further configured to: if the identifier of the ONU that needs to be restarted is not known, set the ONU identifier field of the PLOAM message to be invalid, and use the broadcast Sending the PLOAM message to all ONUs under it Restart the execution module;

The OLT according to claim 11, wherein the restart control module is further configured to: if the all ONUs under the OLT are restarted, send the PLOAM message to the OLT by means of broadcast Restart execution module of all ONUs under;