CN101247665B - Method for improving gigabit passive optical network reliability - Google Patents
Method for improving gigabit passive optical network reliability Download PDFInfo
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- CN101247665B CN101247665B CN200810084489XA CN200810084489A CN101247665B CN 101247665 B CN101247665 B CN 101247665B CN 200810084489X A CN200810084489X A CN 200810084489XA CN 200810084489 A CN200810084489 A CN 200810084489A CN 101247665 B CN101247665 B CN 101247665B
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Abstract
The invention discloses a method for enhancing reliability of gigabit passive optical network, which includes: optical network unit ONU is determined whether is in serial number obtaining state or distance measuring state after optical line terminal OLT receives serial number sent by said ONU, if ONU is not in serial number obtaining state or distance measuring state, OLT does not processing said ONU serial number and sends abnormal warning to network management. ONU is judged whether is in one state of serial number obtaining state or distance measuring state at the same time OLT obtaining serial number sent by ONU, if not, an indicator is sent to said ONU and said ONU is not configured, and a serial number sending state error warning is reported to network management for informing serviceman processing said ONU condition in time. Thus, OLT can process correctly when receives abnormal ONU serial number and GPON network reliability can be increased.
Description
Technical field
The present invention relates to gigabit passive optical network (GPON, Gigabit Passive Optical Network) technology, particularly a kind of method that improves gigabit passive optical network reliability.
Background technology
In the existing Gbit passive optical network system, be connected with a plurality of optical network units (ONU, Optical Network Unit) under each optical line terminal (OLT, Optical Line Terminal).With an ONU is example, confirms that the process of ONU identity is as follows before the OLT configuration ONU: at first enter init state after ONU powers on; According to standard G.984.3, OLT transmits Sequence Number after the request of obtaining gives ONU, and OLT is that sequence number obtains state in this locality with the status indication of ONU; ONU receives sequence number and obtains request, transmits Sequence Number to OLT; Receive the sequence number of ONU transmission as OLT after, check whether the configuration information of this ONU is arranged earlier, if having, then OLT sends and distributes ONU identification message Assign_ONU-ID to ONU, send distance measurement request then to ONU, and be distance measuring states with the status indication of ONU in OLT this locality.According to standard G.984.3, under distance measuring states, ONU also can send OLT with sequence number; After range finding was finished, ONU entered normal operating conditions, no longer transmits Sequence Number to OLT, and OLT just can be configured ONU.
In sum, OLT receives that the situation that ONU transmits Sequence Number has two kinds:
1) sequence number obtains state: OLT broadcast transmission sequence number obtains request, can receive the sequence number that each ONU sends;
2) distance measuring states: OLT sends distance measurement request to each ONU, and each ONU can transmit Sequence Number and respond.
In the real work, except sequence number obtains state and distance measuring states, when communication abnormality, OLT also may receive the sequence number that ONU sends.In this case, the state of the ONU that OLT judges still is normal condition, and the actual abnormality that is in of ONU, then OLT can not normally dispose the data of ONU, so, may cause the professional obstructed of ONU, thereby cause serious fault.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of the GPON of raising reliability, makes the ONU abnormality to be found early, avoids fault to delay.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method that improves gigabit passive optical network reliability, this method comprises:
A, optical line terminal OLT determine whether described ONU is in sequence number and obtains state or distance measuring states after receiving the sequence number of optical network unit ONU transmission, when ONU does not obtain state or distance measuring states for sequence number, and execution in step B;
B, OLT do not handle described ONU sequence number, and send the ONU abnormality alarming to webmaster.
In the steps A, OLT reads the variable of the local ONU state of preserving and determines whether ONU is in sequence number and obtains state or distance measuring states, or operating state.
In the steps A, after OLT receives the sequence number of ONU transmission,, then judge the ONU operation irregularity if the variable indication ONU of the local ONU state of preserving of OLT is in running order.
Step B comprises that also OLT sends Indication message to ONU, and described Indication message comprises numbering, Indication message number and the reserved place of described ONU.
Described ONU state is the state of G.984.3 standard code.
Described Indication message sends by physical layer operations management maintenance PLOAM message.
Described abnormality alarming is a display notification message on network management platform, or shows the ONU icon with particular color on network management platform.
The present invention obtains the sequence number while that ONU sends at OLT, whether the state of judging ONU is in sequence number is obtained in state or the distance measuring states one, if not, just send Indication message to this ONU, this ONU is not configured, report a sequence number transmit status of webmaster fault alarm simultaneously, notify the maintenance personal in time the situation of this ONU to be handled.Like this, OLT can carry out correct processing when receiving unusual ONU sequence number, improved the GPON network reliability.The present invention realizes simply, and is safe and reliable.
Description of drawings
Fig. 1 is the realization flow schematic diagram of the inventive method.
Embodiment
Basic thought of the present invention is: when OLT obtains the ONU serial number message Serial number ONU of ONU transmission, whether the state of judging ONU is in sequence number is obtained in state or the distance measuring states one, if not, just send Indication message, be that invalid ONU identification message Deactivate ONU-ID gives ONU, report the alarm of a sequence number transmit status mistake simultaneously to webmaster, notify the maintenance personal in time the situation of this ONU to be handled.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical solution of the present invention.
After the ONU initialization was finished, method of the present invention comprised as shown in Figure 1:
The state of the ONU that step 2, OLT are preserved according to this locality is judged the state of this ONU, whether is in sequence number and obtains state or distance measuring states, if then execution in step 3, otherwise execution in step 4.
Here, OLT can use global variable to preserve the state of ONU as required; When request of transmitting Sequence Number to ONU or distance measurement request, OLT can upgrade the state information of this ONU.
According to standard G.984.3, if this ONU is the serial number request state, receive the sequence number of ONU transmission as OLT after, check the configuration information whether this ONU is arranged earlier, if have, then OLT sends Assign_ONU-ID message to ONU, sends distance measurement request then to ONU, and is distance measuring states in OLT this locality with the status indication of ONU.
If this ONU is a distance measuring states, ONU also can send OLT with sequence number, and finds range.After range finding was finished, ONU entered normal operating conditions, and OLT just can be configured ONU.
Step 4, OLT do not handle the sequence number that this ONU sends, and send the ONU abnormality alarming.
If ONU is not in sequence number and obtains state or distance measuring states, then should be in normal operating conditions, this moment, ONU no longer transmitted Sequence Number to OLT.Therefore, if the state of the ONU that reads is a normal operating conditions, and OLT receives the sequence number that ONU sends, and it is unusual to show that ONU occurs.This moment, OLT sent a physical layer operations management maintenance (PLOAM to ONU, Physical Layer Operation Administration and Maintenance) Indication message, be Deactivate ONU-ID message, the composition form and the content of this message are as shown in table 1.
| Byte | |
| 1 | The ONU numbering |
| 2 | Message number |
| 3-12 | Reserved place |
Table 1
Reserved place in the table 1 can send indication to ONU as required, and is perhaps vacant.When reserved place was vacant, OLT did not react the unusual sequence number transmission of ONU; Simultaneously, OLT reports the alarm of sequence number transmit status mistake to webmaster.This abnormality alarming can pass through display notification message on network management platform, or by on network management platform, showing that with particular color the ONU icon carries out failure warning.The webmaster attendant just can know as early as possible that concrete which ONU work is undesired like this, so that handle and safeguard.
The present invention can make OLT under the situation of receiving unusual Serial_number_ONU message, carries out correct processing, thereby can not produce erroneous judgement to the state of ONU, improves the GPON network reliability.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (6)
1. a method that improves gigabit passive optical network reliability is characterized in that, this method comprises:
A, optical line terminal OLT determine whether described ONU is in sequence number and obtains state or distance measuring states after receiving the sequence number of optical network unit ONU transmission, when ONU does not obtain state or distance measuring states for sequence number, and execution in step B;
B, OLT do not handle described ONU sequence number, and send the ONU abnormality alarming to webmaster,
In the steps A, OLT reads the variable of the local ONU state of preserving and determines whether ONU is in sequence number and obtains state or distance measuring states, or operating state.
2. the method for raising gigabit passive optical network reliability according to claim 1, it is characterized in that, in the steps A, after OLT receives the sequence number of ONU transmission, if the variable indication ONU of the local ONU state of preserving of OLT is in running order, then judge the ONU operation irregularity.
3. the method for raising gigabit passive optical network reliability according to claim 1 and 2 is characterized in that, step B comprises that also OLT sends Indication message to ONU, and described Indication message comprises numbering, Indication message number and the reserved place of described ONU.
4. the method for raising gigabit passive optical network reliability according to claim 3 is characterized in that, described ONU state is the state of G.984.3 standard code.
5. the method for raising gigabit passive optical network reliability according to claim 3 is characterized in that, described Indication message sends by physical layer operations management maintenance PLOAM message.
6. the method for raising gigabit passive optical network reliability according to claim 3 is characterized in that, described abnormality alarming is a display notification message on network management platform, or shows the ONU icon with particular color on network management platform.
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| CN200810084489XA CN101247665B (en) | 2008-03-25 | 2008-03-25 | Method for improving gigabit passive optical network reliability |
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| CN200810084489XA CN101247665B (en) | 2008-03-25 | 2008-03-25 | Method for improving gigabit passive optical network reliability |
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| CN101247665A CN101247665A (en) | 2008-08-20 |
| CN101247665B true CN101247665B (en) | 2010-12-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101931830B (en) * | 2009-06-18 | 2014-03-19 | 中兴通讯股份有限公司 | Method for upgrading secret key in Gigabit passive optical network and optical line terminal |
| CN102065344B (en) * | 2009-11-12 | 2016-09-07 | 中兴通讯股份有限公司 | Data transmission method and Gbit passive optical network system |
| CN102111689B (en) * | 2009-12-29 | 2014-03-12 | 中兴通讯股份有限公司 | Method and system for notifying state of optical network unit in passive optical network |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383276A (en) * | 2001-04-25 | 2002-12-04 | 华为技术有限公司 | Method for measuring distance in passive optical ATM network |
| CN101060370A (en) * | 2006-04-21 | 2007-10-24 | 华为技术有限公司 | A PON terminal management method and system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383276A (en) * | 2001-04-25 | 2002-12-04 | 华为技术有限公司 | Method for measuring distance in passive optical ATM network |
| CN101060370A (en) * | 2006-04-21 | 2007-10-24 | 华为技术有限公司 | A PON terminal management method and system |
Non-Patent Citations (2)
| Title |
|---|
| Gigabit-capable Passive Optical Networks (G-PON): Transmission convergence layer specification;TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU;ITU-T Recommendation G.984.3;20040229;57-58 * |
| TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU.Gigabit-capable Passive Optical Networks (G-PON): Transmission convergence layer specification.ITU-T Recommendation G.984.3.2004,57-58. |
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