WO2009094943A1

WO2009094943A1 - Line administrating method, system and apparatus

Info

Publication number: WO2009094943A1
Application number: PCT/CN2009/070286
Authority: WO
Inventors: Zhiguang Xu; Sulin Yang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2008-01-25
Filing date: 2009-01-22
Publication date: 2009-08-06
Also published as: CN101494497A

Abstract

The embodiment of the present invention discloses a line administrating method, which comprises: identifying the source of the uplink optical signal and obtaining the source identification information of the said uplink optical signal; measuring the optical power of the uplink optical signal before it is amplified or regenerated by the extender and/or the optical power of the uplink optical signal after it is amplified or regenerated by the extender and obtaining measurement data relevant to optical power of the uplink optical signal; uploading the said measurement data and the identification information of the source of the said uplink optical signal. An optical network system and a line administrating apparatus are also disclosed by the embodiments of the present invention. By applying the embodiments of the present invention, the following is realized without need of service cut-off: optical power measuring for the uplink optical signal transmitted from each ONU, as well as carrying out administration and finding both the failure place and the failure cause according to the measurement data, so that the system maintainability and extensibility are improved and the system maintaining cost is reduced.

Description

The present invention claims to be filed on January 25, 2008 by the Chinese Patent Office, the application number is 200810006941.0, the Chinese patent application entitled "A Method, System and Apparatus for Line Management" Priority is hereby incorporated by reference in its entirety. Technical field

Embodiments of the present invention relate to optical network transmission technologies, and in particular, to a method, system, and apparatus for line management. Background technique

At present, FTTx (fiber-to-the-home, fiber-to-the-building, fiber-to-the-resident, etc.) network construction is becoming a hot spot in the construction of access networks at home and abroad. PON (Passive Optical Network) access network technology is recognized as the best solution for FTTx in the industry. This technology enables multiple users to share a single fiber, thus enabling ODN (Optical Distribution Network). Does not require any active devices, ie does not require 0-Ε-0 (Optical-Electrical-Optical) conversion, this point-to-multipoint architecture greatly reduces network installation, management and maintenance cost.

The P0N network is composed of an OLT (Optical Line Terminal) on the central office, an Optical Network Unit (ONU) on the user side, or an Optical Network Terminal (OTT) and an ODN, as shown in Figure 1. . The transmission direction of 0LT to 0NU is the downlink direction, and the TDM (Time Division Multiplex) is adopted, that is, the downlink data transmission is continuous, and the OLT continuously transmits the information broadcast to each ONU, and each ONU selects itself. Data reception; ONU to OLT transmission is in the uplink direction, using TDMA (Time Division Multiple Access), that is, uplink data transmission is bursty, different ONUs occupy different uplink time slots, multiple ONUs The uplink is shared by time division multiplexing.

In order to enable a network to access more users and cover a wider range, it is necessary to extend the distance between the OLT and the ODN and increase the branch ratio of the ODN. Add the attenuation of the optical signal in the network. Therefore, it is necessary to add a repeater Extender to the network to compensate for the attenuation of the signal, so that the receiver of the OLT and the ONU can work normally, as shown in FIG. Extender can be implemented by OEO or OA (Optical Amplifier).

In the process of deploying and running the PON network, in order to better control the management system and more accurately locate the fault point and the cause of the fault, it is necessary to measure the uplink of each ONU before the Extender amplification or regeneration process and/or after the Extter amplification or regeneration process. The optical power of the optical signal. Summary of the invention

The embodiment of the invention provides a line management method, system and device, so as to measure the optical power of the uplink optical signal sent by each ONU without interrupting the service, thereby better controlling the management line and being more accurate. The location of the fault and the cause of the fault improve the maintainability and expandability of the line and reduce the maintenance cost of the line.

To achieve the above objective, an embodiment of the present invention provides a method for line management, including:

Identifying a source of the uplink optical signal, and acquiring identification information of a source of the uplink optical signal;

Measuring optical power of the upstream optical signal before being subjected to amplification or regeneration processing by the repeater and/or after the upstream optical signal is subjected to amplification or regeneration processing by the repeater, and obtaining optical power related to the optical power of the upstream optical signal Measurement data;

The identification information of the measurement data and the source of the upstream optical signal is uploaded. On the other hand, an embodiment of the present invention also provides an optical network system, including an ONU, a repeater including a line management device, and an OLT:

The ONU is configured to send an uplink optical signal.

The repeater for the line management device is configured to perform amplification or regeneration processing on the uplink optical signal sent by the ONU, identify a source of the uplink optical signal, and acquire Identifying information of a source of the upstream optical signal, and measuring optical power after the upstream optical signal is subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater, And measuring data related to optical power of the uplink optical signal, and uploading the measurement data and the identification information of the source of the uplink optical signal to the OLT; the OLT is configured to receive the relay of the device including the line management The measurement data uploaded by the device and the identification information of the source of the upstream optical signal. On the other hand, the embodiment of the present invention further provides a device for line management, including: a source identification module, configured to identify a source of the uplink optical signal, to obtain identification information of a source of the uplink optical signal;

a power measurement module, configured to measure, after the amplification or regeneration process by the repeater, and/or the optical power after being amplified or regenerated by the repeater, to obtain an optical power related to the optical signal of the uplink optical signal Measurement data;

a measurement control module, configured to control the power measurement module to start optical power measurement and end optical power measurement according to the identification information obtained by the source identification module;

And a data uploading module, configured to upload the measurement data obtained by the power measurement module and the identification information obtained by the source identification module. The embodiment of the invention also provides a method for line management, and the method for line management includes:

Detecting the presence or absence of an uplink optical signal from the optical network unit ONU received by the repeater, controlling the start optical power measurement and the ending optical power measurement according to the detection result of the signal detection module, and recording time information of the uplink optical signal, where Determining, according to the detection result of the signal detecting module, the starting optical power measurement, measuring the optical power of the upstream optical signal after being subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater. The measurement data related to the optical power of the uplink optical signal is obtained. After the optical power measurement is ended, the measurement data and the time information of the uplink optical signal are reported to the optical line terminal OLT. An embodiment of the present invention further provides a device for line management, where the device for line management includes:

a signal detecting module, configured to detect the presence or absence of an uplink optical signal;

a power measurement module, configured to measure optical power of the upstream optical signal after being subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater, to obtain optical power related to the uplink optical signal Measurement data;

a measurement control module, configured to control the power measurement module to start optical power measurement or end optical power measurement according to the detection result of the signal detection module, and record time information of the uplink optical signal;

And a data uploading module, configured to upload measurement data of the power measurement module and time information of the uplink optical signal recorded by the measurement control module. Compared with the prior art, the technical solution of the embodiment of the present invention has the following advantages: Because the line management method for the optical power measurement of the uplink optical signal is performed on the Extender, the OLT is implemented without interrupting the service. It can accurately measure the upstream optical power of each ONU. The measurement accuracy is better than one microwatt, and the measurement time is less than one microsecond. According to the configuration of the system, only the upstream optical power of the ONU needs to be measured. Supporting the time of one uplink frame Measure the optical power of all ONUs in a PON system with 128 ONUs; more accurately locate the fault point and the cause of the fault, and facilitate system expansion. When adding a new ONU, there is no need to increase the relevant configuration to improve the system. Maintainability and reduce maintenance costs. DRAWINGS

1 is a tree topology of a passive optical network system in the prior art;

2 is a schematic diagram of a tree topology of a passive optical network system with an Extender added; FIG. 3 is a schematic flowchart of a line management method according to Embodiment 1 of the present invention; FIG. 4 is a specific implementation manner of the method according to the present invention: Schematic diagram of a line management method based on uplink frame parsing;

5 is a schematic structural diagram of an uplink frame of an EPON; 6 is a schematic structural diagram of an uplink frame of a GPON;

7 is a schematic flowchart of a method for line management based on downlink frame parsing according to a second embodiment of the method of the present invention;

8 is a schematic structural diagram of a downlink frame of a GPON;

9 is a schematic flowchart of a method for line management based on real-time detection of presence or absence of an optical signal according to a third embodiment of the method of the present invention;

10 is a schematic diagram of an optical signal propagation path of a passive optical network system with a Guard Time according to an embodiment of the present invention;

11 is a schematic flowchart of a method for managing a line according to a method for recording an uplink optical signal transmission time according to a fourth embodiment of the method of the present invention;

12 is a schematic structural diagram of a line management system according to Embodiment 2 of the present invention; FIG. 13 is a schematic structural diagram of a line management apparatus based on uplink frame parsing according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a line management apparatus based on downlink frame parsing according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a line management apparatus based on detecting the presence or absence of an optical signal in real time according to an embodiment of the present invention; FIG.

FIG. 16 is a schematic structural diagram of a line management apparatus based on recording an uplink optical signal transmission time according to an embodiment of the present invention. detailed description

Referring to FIG. 2, after the Extender is added to the PON network, the original PON is divided into two parts, the first part between the ONU and the Extender, and the second part between the Extender and the OLT. This is because when the upstream optical signal passes through the Extender, it will be amplified or reproduced. After these processes, some characteristics of the upstream optical signal are changed by Extender, such as optical power, signal to noise ratio, extinction ratio, and jitter. Therefore, it is not possible to judge the operation of the entire PON network only by the characteristics of the signals transmitted or received by the ONU and the OLT. It is also necessary to know the signals before and after entering the Extender. The characteristics of the Extender can correctly understand the changes of the upstream optical signal during the above two parts of the transmission process, and judge the network operation. These characteristics are typically optical power, optical delay characteristics, and optical dispersion characteristics. The embodiment of the invention provides a method, a system and a device for managing a line, wherein the source and the end time of the uplink optical signal are obtained by identifying the source of the uplink optical signal on the Extender, and the uplink optical signal is implemented at the Extender. Optical power measurement, and the measurement results are transmitted to the OLT, which better manages and maintains the PON system including Extender, more accurately locates the fault point and the cause of the fault, improves the maintainability and expandability of the system, and reduces system maintenance. cost.

The specific embodiments of the present invention are further described in detail below with reference to the drawings and embodiments.

To achieve the above objective, the first embodiment of the present invention provides a method for line management. As shown in FIG. 3, the method includes:

Step S201: Obtain a start and end time of the ONU uploading the uplink optical signal. Since the uplink in the PON network is TDMA, that is, different ONUs upload information in different time periods. Therefore, it is necessary to know the start and end time of the ONU uploading the upstream optical signal to ensure that the measured data belongs to one ONU, and the measured data is meaningful. Otherwise, the measurement results of multiple ONUs may be indistinguishable due to the inability to distinguish between the data and the ONU. The relationship between the data causes the data to be unprocessable.

Step S202: Identify a source of the uplink optical signal.

After the measurement data of an ONU is correctly obtained, it is also necessary to know the identifier of the ONU, that is, the source of the optical signal. If you do not know which ONU the measured data belongs to, even if you get the correct measurement result, you cannot correspond to the ONU, and the measurement is still unsuccessful.

Step S203: Measure optical characteristics (such as optical power) before the uplink optical signal is subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater, to obtain optical characteristics (such as light) with the upstream optical signal. Power) related measurement data.

When the upstream optical signal passes through the Extender, it will be amplified or regenerated. After these processes, the characteristics of the upstream optical signal are changed, and some of its original characteristics, such as optical power, are lost. If only the upstream optical signal is measured on the OLT, only the characteristics of the optical signal entering the OLT can be obtained, and neither the upstream optical signal nor the Extender can be obtained. Or the characteristics before the regenerative processing, nor the characteristics when the upstream optical signal leaves the Extender. These characteristics are very important for understanding the operation of the network.

Measuring the optical power of the upstream optical signal before being amplified or regenerated by the Extender on the Extender, such as measuring the optical power before the Extender amplification or reproduction processing can obtain the signal transmission between the ONU and the Extender;

Measuring the optical power of the upstream optical signal after the Extender is measured on the Extender, such as measuring the optical power after the Extender is amplified or reproduced, to obtain the signal transmission of the line between the Extender and the OLT;

The Extender's relay of the upstream optical signal can be obtained by simultaneously measuring the optical power of the upstream optical signal after the Extender amplification or regeneration processing and the optical power after the amplification or reproduction processing on the Extender.

It should be noted that steps S201, S202, and S203 may be reversed or may be performed simultaneously.

Step S204: The Extender records measurement time information of the measurement uplink optical signal, where the measurement time information includes but is not limited to the following: a) measurement start time and measurement end time, b) measurement start time and measurement duration, c) end Time and measurement duration. In this embodiment of the invention, the measurement time information can be used as identification information identifying the source of the upstream optical signal.

If the source of the uplink optical signal can be identified in step S202, this step can be skipped; if the source of the upstream optical signal cannot be identified, the Extender needs to record the measurement time information for measuring the uplink optical signal, and use the measurement time information as the uplink light. The identification information of the source of the signal may also be used by the ONU to upload the start time and end time of the uplink optical signal (ie, the start time and the authorized time of the upload in the UP BW map) as the identification information of the source of the uplink optical signal. Because the OLT knows the start time and the end time of the ONU upload, the time between the ONU uplink optical signal and the Extender can be estimated based on the measurement time information and the distance between the OLT, the ONU, and the Extender, so that the OLT or the network management can establish the measurement time. The correspondence between the information (such as the measurement start time and the measurement end time) and the ONU, thereby obtaining the correspondence between the measurement data and the ONU. Or, according to the ONU, the start time and the end time of the uplink optical signal are directly uploaded. Identify the ONU.

It should be noted that steps S204 and S203 are performed simultaneously, that is, when the measurement starts, the measurement start time is recorded; when the measurement is finished, the measurement end time or the measurement duration is recorded.

Step S205: Upload the measurement data and the identification information of the source of the uplink optical signal.

The Extender uploads the identification data of the measurement data and the source of the upstream optical signal to the OLT or the network management system, and the data is processed by the OLT or the network management tube. According to the correspondence between the measurement data and the ONU, the ONU is obtained before and after the amplification or regeneration process by the Extender. Optical power information, so as to understand the operation of the network, better real-time management and maintenance of the PON system. The Extender can also report the measurement time information indicating the measurement optical signal together with the identification data of the measurement data and the source of the upstream optical signal, including but not limited to: start time and measurement end time, or measurement start time and measurement duration, Or end time and measurement duration.

The following describes a specific implementation manner of the method of the present invention with reference to FIG. 4: A line management method based on uplink frame parsing is further described in detail. The method includes:

Step S301: The Extender parses the information carried by the current ONU uplink optical signal to identify the source of the uplink optical signal.

In the uplink frame structure of the ONU of the EPON (Ethernet Passive Optical Network) and the GPON (Gigabit Passive Optical Network), the source information of the uplink optical signal is included in the uplink frame structure. The upstream frame of the ONU is parsed to know the source of the upstream optical signal.

The uplink frame structure of EPON is shown in Figure 5. The first is the 8-byte preamble Preamble. The 6th and 7th bytes of the preamble are LLID (Logical Link Identification), which is used to identify ONU's ONU identifier;

The upstream frame structure of GPON is shown in Figure 6. The first is the pre-code Preamble of a byte, then the delimiter of the b-byte delimiter, followed by the inter-bit difference parity BIP of 1 byte length. 1 byte ONU identifier.

According to the above ONU identifier, it can be clearly known which ONU is currently uploading. Step S302: Obtain an ONU upload start time and an end time. Once the ONU ID is detected, it indicates that the ONU upload has started, that is, the ONU upload start time can be determined according to the time of the ONU ID to start the measurement.

The time at which the ONU upload ends is obtained according to the Length/Type field in the EPON or the length information in the GEM frame header in the GPON.

Step S303: After the ONU identifier is parsed, it is learned that an ONU is uploaded, and the measurement of the optical power of the uplink optical signal is started.

Step S304: Measure the optical power of the upstream optical signal after the Extender amplification or regeneration process and/or after the Extender amplification or regeneration process. Since the Extender is amplified or regenerated by OEO or OA, it measures the optical power of the upstream optical signal before OEO/OA amplification or regeneration and/or after OEO/OA amplification or regeneration. For the upstream optical signal, the optical signal before the OEO/OA amplification or regeneration process is the optical signal between the OEO/OA and the ONU, and the optical signal after the OEO/OA amplification or regeneration process is between the OEO/OA and the OLT. Optical signal. An optical power measurement method prior to OEO/OA amplification or regeneration processing is as follows:

The upstream optical signal is split into two parts by a 1:2 coupler (optical coupler) before entering the OEO or OA amplification or regeneration process, and part of it enters OEO or OA (such as semiconductor amplifier SOA) for relaying. A portion enters the power measurement unit for power measurement. In the power measurement, the optical signal is first converted into an electrical signal, and then the electrical signal is amplified, filtered, etc., to obtain a voltage or current signal corresponding to the optical power, and the voltage or current signal is sampled to be amplified or regenerated by Extender. The previous sampled data is processed, and the sampled data is further processed to obtain an optical power value before being amplified or reproduced by the Extender.

The second optical power measurement method before OEO/OA amplification or regeneration processing is as follows:

The uploaded optical signal is received by a receiver in the OEO, and the receiver converts the incident optical signal into an electrical signal, which is forwarded to the transmitter in the OEO and the embedded MAC chip, and also generates a voltage proportional to the incident optical power or The current signal is output to the power measurement unit. The power measurement unit samples the voltage or current signal to obtain The Extender amplifies or reproduces the sampled data before processing, and further processes the sampled data to obtain the optical power value before being amplified or reproduced by the Extender.

An optical power measurement method after OEO/OA is as follows:

After passing the OEO or OA, the upstream optical signal divides the optical signal into two parts through a 1: 2 coupler (optocoupler), one part continues to upload to the OLT, and the other part enters the power measurement unit for power measurement. In power measurement, the optical signal is first converted into an electrical signal, and then the electrical signal is amplified, filtered, etc., to obtain a voltage or current signal corresponding to the optical power, and the voltage or current signal is sampled to be amplified or regenerated by Extender. After processing the sampled data, the sampled data is further processed to obtain an optical power value after being amplified or reproduced by the Extender.

Another method of measuring optical power after OEO/OA amplification or regeneration is as follows:

The uploaded optical signal is received by a receiver in the OEO, and the receiver converts the incident optical signal into an electrical signal that is forwarded to the transmitter in the OEO and the embedded MAC chip. The transmitter in OEO converts the forwarded electrical signal into an optical signal that is transmitted to the OLT and also produces a voltage or current signal proportional to the incident optical power that is output to the power measurement unit. The power measurement unit samples the voltage or current signal to obtain sampled data after being extended or reproduced by the Extender, and further processes the sampled data to obtain an optical power value after being extended or reproduced by the Extender.

Step S305: End the measurement of the optical power of the uplink optical signal when the end time of the ONU uploading in the uplink frame arrives or before the arrival.

Step S306: Upload measurement data and identification information.

The measurement data is an optical power value or sample data of the uplink optical signal. If the measured measurement data is sampled data, and the sampled data includes voltage, current, etc., the optical power value is calculated by the OLT or the network tube based on the sampled data.

While measuring the optical power value of the uplink optical signal, the ONU identifier of the uplink optical signal, that is, the identification information of the uplink optical signal, is recorded, and the measurement data and the ONU identifier are uploaded to the OLT together. The following describes the second embodiment of the method of the present invention with reference to FIG. 7: A line management method based on downlink frame parsing is further described in detail. The method includes:

Step S601: The Extender parses the downlink frame of the OLT to obtain the start and end time of the ONU upload.

In the GPON downlink frame structure, the authorization information uploaded by the ONU is included, and the start time and the end time of the ONU upload can be obtained by the authorization information of the ONU uploading the optical signal parsed by the frame of the downlink optical signal of the OLT. As shown in FIG. 8, in the bandwidth map US BW map domain, the OLT allocates a time slot for each transmission container T-CONT, that is, allocates the start time and end time of the upload, and the T-CONT is assigned by the identifier Alloc-ID. distinguish. Each ONU may contain one or more T-CONTs, and the time slot assigned to the T-CONT determines the upload start time and upload end time of each ONU, thereby determining the upload order of multiple ONUs. The Extender can know the time when each ONU upload starts and ends by parsing the US BW map information.

Step S602: Identify a source of the uplink optical signal.

The Extender parses the US BW map information and records the start and end time of the ONU upload and the ONU identifier in the US BW map information. The time when the upstream optical signal arrives at the Extender and the recorded ONU upload start and end times and the ONU identifier is determined to be Which ONU is uploading, thereby obtaining the ONU ID of the upstream optical signal, that is, the identifier of the upstream optical signal. In another embodiment of the present invention, the time at which the ONU upload starts and ends can be directly used as the identification information of the source of the upstream optical signal.

Step S603: When any one ONU upload start time comes, the optical power measurement of the uplink optical signal is started. Measuring the optical power of the upstream optical signal after it has been subjected to Extender amplification or regeneration processing and/or after Extter amplification or regeneration processing, that is, after OEO/OA amplification or regeneration processing and/or after OEO/OA amplification or regeneration processing. Optical power.

The specific measurement method is as described in step S304 of the first embodiment of the method of the present invention, and details are not described herein again.

Step S604, ending the optical power measurement of the uplink optical signal when the time when the ONU upload ends or before the arrival. Step S605, uploading measurement data and identification information. The measurement data and the identification information are as described in step S306 of the first embodiment of the method of the present invention, and are not described herein again.

In the above specific embodiments of the present invention, the frame of the uplink optical signal of the ONU or the frame of the downlink optical signal of the OLT is parsed by the Extender to identify the source of the uplink optical signal, which may be performed without interrupting the service. The optical power is measured on the uplink optical signal sent by each ONU, so that the management and maintenance of the PON system are better realized, the fault point and the fault cause are more accurately located, the maintainability and expandability of the system are improved, and the system maintenance is reduced. cost.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to Figure 9, a third embodiment of the method of the present invention will be further described in detail based on a line management method for detecting the presence or absence of an optical signal in real time. The method includes: Step S801, detecting the presence or absence of the uplink optical signal received by the Extender in real time, and detecting that the uplink optical signal changes from nothing to the next step, performing step S802;

The ONU uplink adopts the TDMA format. In order to prevent the uplink burst optical signals of multiple ONUs from colliding, there is a guard time Guard time between the signals of the adjacent two ONUs, and there is no optical signal during this protection time, as shown in Fig. 10. Shown. That is, there is a period of no light before the start of any ONU upstream optical signal; after any ONU upstream optical signal ends, there is also a period of no light. The Extender can detect the start of any ONU upload by detecting the change of the upstream optical signal from scratch in real time. After any ONU upstream optical signal is over, there is also a dull time. By Extender real-time detection of the upstream optical signal from the beginning to the end of the change, you can know the end of any ONU's upload.

Step S802: When it is detected in step S801 that the uplink optical signal changes from nothing, the uplink frame is analyzed, and the source of the uplink optical signal is identified, for example, the ONU identifier carried in the uplink frame is parsed, and the ONU corresponding to the ONU identifier is determined to be uploaded. At the beginning, the optical power measurement of the upstream optical signal is started, and the time at which the measurement is started is recorded.

When a change from a no-light signal to an optical signal is detected, it is confirmed that an ONU is uploading data at this time, and the upstream frame of the ONU is started to be parsed. By analyzing the uplink frame of the ONU, the ONU identifier is obtained, and it is known which ONU is uploading at this time. Thereby determining the source of the upstream optical signal. By identifying the ONU identifier, it can ensure that the uplink data measurement is more direct and effective, and the computational complexity is reduced, which is not easy to cause misjudgment. For example, in actual applications, the presence of a zero in the upstream optical signal may determine that the state of the upstream optical signal received by the Extender is a no-light signal, stopping the power measurement; when the consecutive 0 in the upstream optical signal ends, The status of the uplink optical signal received by the Extender is determined to be an optical signal, and the power measurement is started. Since the uplink optical signal is actually transmitted by the same ONU, the ONU identifier is not detected from the uplink frame, and the signal may not be measured. , or measure the signal, but record the measurement start information.

Step S803, measuring the optical power of the upstream optical signal after the Extender amplification or regeneration process and/or after the Extender amplification or regeneration process, that is, before the OEO/OA amplification or regeneration process and/or by OEO/OA amplification or regeneration. The optical power after processing is processed and the measurement data is recorded.

Step S804: When the uplink optical signal received by the Extender is detected in real time from no change to no change, the measurement is ended, and the time for ending the measurement is recorded, and the measurement end time is indicated.

Step S805: Upload measurement data and identification information. The measurement data and the identification information are as described in step S306 of the first embodiment of the method of the present invention, and are not described again.

In addition, the identification information ONU identifier in step S306 can be replaced by measurement time information, where the measurement time information is determined according to the measurement start time obtained in step S802 and the measurement end time obtained in S804, for example, the measurement time information is the measurement start time and the measurement end. Time, or measurement start time and measurement duration, or measurement end time and measurement duration. That is to say, in step S802, the time for starting the measurement and the time for ending the measurement can be detected and recorded as the source of identifying the upstream optical signal, and the time of starting the 3⁄4 'J amount and the time of ending the measurement are taken as the source of the upstream optical signal. Identification information.

In addition, the measurement time information may be reported to the OLT together with the measurement data and the identification information, so that the OLT identifies the ONU according to the measurement time information and/or performs analysis according to the measurement time information and the measurement data to determine the operation of the network. At this time, the measurement time information can be used as a basis for evaluating the measurement data and the operation of the network. In the embodiment of the present invention, the presence or absence of the uplink optical signal is detected by the Extender in real time, and the uplink frame of the ONU is analyzed to determine the source of the uplink optical signal and the start time and end time of the upload, and when the ONU uploads data, the real-time pair The optical power measurement of the uplink optical signal can measure the optical power of the uplink optical signal sent by each ONU without interrupting the service, thereby better implementing management and maintenance of the PON system, and more accurately locating the fault point. And the cause of the failure, improve system maintainability, scalability, and reduce system maintenance costs.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to Figure 11, a fourth embodiment of the method of the present invention will be further described in detail based on a line management method for recording the transmission time of an upstream optical signal. The method includes:

Step S901: detecting the presence or absence of the uplink optical signal received by the Extender in real time, determining the start of the ONU upload if the uplink optical signal changes from nothing, performing step S902; and determining the ONU upload if the uplink optical signal changes from presence to no. When it is finished, step S904 is performed.

The ONU uplink adopts the TDMA format, and the Extender can detect the change of the upstream optical signal from scratch in real time, and can know the start of uploading of any ONU.

Step S902: When it is determined that the ONU upload starts, the optical power measurement of the uplink optical signal is started, and the time for starting the measurement is recorded, and is represented by the measurement start time.

When a change from a no-light signal to an optical signal is detected, it is considered that an ONU is uploading data, starting the optical power measurement of the upstream optical signal, and recording the time at which the measurement starts.

Step S903: When the optical power measurement of the uplink optical signal is started in step S902, performing measurement, and the specific steps of performing the measurement include:

Measuring the optical power of the upstream optical signal after the Extender amplification or regeneration process and/or after the Extter amplification or regeneration process, ie, before the OEO/OA amplification or regeneration process and/or after the OEO/OA amplification or regeneration process Optical power, and record measurement data. The specific measurement method is as described in step S304 of the first embodiment of the method of the present invention, and details are not described herein again.

Step S904, detecting the presence or absence of the uplink optical signal received by the Extender in real time, when The end of the ONU upload is judged, the optical power measurement of the upstream optical signal is ended, and the time at which the measurement is ended is recorded, and the measurement end time is indicated.

The ONU uplink adopts the TDMA format, and the time in which the upload of the ONU is completed can be known by the real-time detection in step S901 that the Extender receives the change of the uplink optical signal from the presence to the end. When a change from the optical signal to the no-light signal is detected, it is considered that the ONU upload is ended, the optical power measurement of the upstream optical signal is ended, and the time at which the measurement ends is recorded, which is indicated by the measurement end time.

The ONU uplink adopts the TDMA format, and the Extender can detect the change of the uplink optical signal from the presence to the end in real time, and can know the time when the upload of any ONU ends. When a change from the optical signal to the no-light signal is detected, the ONU upload is considered to be completed, the optical power measurement of the upstream optical signal is ended, and the time at which the measurement ends is recorded.

Step S905: Upload measurement data and corresponding measured time information to the OLT, wherein the measured time information is the measurement start time of step S902 and the measurement end time of step S904.

In actual applications, the Extender may recognize that the status of the upstream optical signal is a no-light signal and stop the power measurement. If the connected end of the upstream optical signal is 0, the Extender will recognize the uplink. The optical signal state is an optical signal, and the power measurement is started. Since the OLT clearly knows the time period during which each ONU transmits the uplink optical signal, even if the Extender performs multiple measurements on the uplink optical signal sent by the same ONU, and records more The time information is measured, but if the OLT recognizes that the plurality of measurement time information is within the same period of time that the same ONU sends the uplink optical signal, the OLT still classifies the plurality of measurement data as the measurement data of the uplink optical signal sent by the same ONU.

In the embodiment of the present invention, the presence or absence of the uplink optical signal is detected by the Extender in real time. When the ONU uploads data, the optical power measurement of the uplink optical signal and the transmission time of the uplink optical signal are recorded in real time, without interrupting the service. , measuring the optical power of the uplink optical signal sent by each ONU, thereby better implementing the tube of the PON system Management and maintenance, more accurate positioning of fault points and causes of failure, improve system maintainability, scalability, and reduce system maintenance costs.

The second embodiment of the present invention further provides an optical network system, such as the passive optical network system shown in FIG. 12, including an ONU 1, an Extender 2 and an OLT 3 including a line management device 21, and an Extender 2 respectively passing through an optical transmission channel and an ONU. 1 is connected to OLT 3.

The ONU 1 is used for transmitting the uplink optical signal; the Extender 2 including the line management device 21 is used for amplifying or regenerating the ONU 1 upstream optical signal, and measuring it before OEO/OA amplification or regeneration processing and/or passing OEO/OA The optical power after the processing is amplified or reproduced, and the result of the measurement is uploaded to the OLT 3; the OLT 3 is configured to receive the result of the measurement of the ONU 1 upstream optical signal and the Extender 2 upload.

The line management device 21 is configured to identify the source of the uplink optical signal, obtain identification information of the source of the uplink optical signal, and measure the uplink optical signal of the ONU 1 before being amplified or regenerated by the Extender 2 and/or after being amplified or regenerated by the Extender 2 The optical power is used to obtain measurement data; and the identification information and measurement data are reported to the OLT.

The identification information includes but is not limited to: a) identifying an ONU identifier of the ONU 1; b) measuring a measurement time of the uplink optical signal, such as a measurement start time and a measurement end time, a measurement start time, a measurement duration, and a measurement end time. And the measurement duration, etc.; c) The ONU 1 transmits the upload start and end times of the upstream optical signal.

Specifically, the line management device 21 monitors the downlink frame sent by the OLT to the ONU, parses the upload start time and the end time of the ONU from the 0 downlink frame, and controls the uplink light of the specific ONU according to the upload start time and the end time of the monitored ONU. The measurement is performed after the signal is amplified or regenerated by the Extender 2 and/or after the amplification or regeneration process of the Extender 2 to obtain the measurement data of the specific ONU, and the measurement data of the specific ONU and the identification information of the source of the upstream optical signal are reported to the signal. OLT. The identification information may be an ONU identifier, an upload start time and an end time of the ONU, or a combination of an ONU identifier and an ONU upload start time and an end time.

The specific structure of the line management device 21 is as described in the following embodiments of the present invention.

As shown in FIG. 13, a line management apparatus based on uplink frame parsing according to an embodiment of the present invention includes: a source identification module 211, a time acquisition module 212, and a power measurement module. Block 213, data upload module 214.

The source identification module 211 is configured to parse the information carried by the current ONU uplink optical signal to identify the source of the uplink optical signal. Once the source identification module 211 detects the ONU ID for the EPON or GPON analysis, the ONU upload has begun. The measurement can be performed immediately.

The time acquisition module 212 is configured to record measurement time information of the measured uplink optical signal, such as one or more of a measurement start time, a measurement end time, and a measurement duration. After the source identification module 211 parses the ONU identifier, the time acquisition module 212 knows that an ONU is uploading according to the ONU identifier, and records the measurement start time of the measured uplink optical signal.

The power measurement module 213 is configured to measure the optical power of the upstream optical signal after the Extender amplification or regeneration process and/or after the Extender amplification or regeneration process; when the time acquisition module 212 knows that the ONU upload end time comes or arrives, The measurement end time of the measurement of the uplink optical signal is recorded, and the power measurement module 213 ends the measurement of the optical power of the uplink optical signal, and the measurement data of the power measurement module 213 and the identification information and time of the source identification module 211 are output by the data uploading module 214. The time information recorded by the acquisition module 212 is uploaded to the OLT. Here, the measurement start time and the measurement end time are respectively equivalent to the start time and end time of the arrival of the upstream optical signal to the Extender.

The source identification module 211 may further include:

The uplink frame parsing module 2111 is configured to parse the frame of the uplink optical signal received by the Extender, and obtain the length information of the ONU identifier and the uplink optical signal. Here, the length information of the uplink optical signal may be the start time and the end time of the uplink optical signal, or the start time and duration of the uplink optical signal.

In addition, the line management device further includes a measurement control module 215, configured to control the power measurement module 213 to start optical power measurement and end optical power measurement according to the identification information of the source identification module 211, and the specific control manner includes: uploading according to the ONU recorded on the Extender. The start time and end time control, or based on the detection of the presence or absence of the upstream optical signal, or the time calculated according to the start time and end time of the ONU upload (such as the measurement time, or the start and end of the upstream optical signal to the Extender) Time) control, etc.

The embodiment of the invention further provides a line management device based on downlink frame analysis, and a device The structure is similar to the structure of the line management device based on the uplink frame resolution provided by the embodiment of the present invention. As shown in FIG. 14, the source identification module 211, the time acquisition module 212, the power measurement module 213, the data uploading module 214, and the measurement control module 215 are included. .

In the line management device based on the downlink frame analysis, the source identification module 211 may further include:

The downlink frame parsing module 2112 is configured to parse the frame of the downlink optical signal received by the Extender to obtain the authorization information of the ONU to upload the optical signal, and obtain the start time and the end time of the ONU uploading the uplink optical signal according to the authorization information of the ONU uploading the optical signal.

The time obtaining module 212 obtains the start time and the end time of the upload of the ONU from the downlink frame parsing module 2112, and provides time information to the data uploading module 214, which may also be the start time and end time of the upload of the ONU, or according to the upload of the ONU. Start time and end time and parameters related to Extender (such as the distance between Extender and OLT, or the distance between Extender and ONU, or the delay parameter between Extender and ONU) calculate the start time and end time of the estimated upstream optical signal to reach Extender. . The time acquisition module 212 can also provide time information to the measurement control module 215 as a basis for measurement control. The measurement control module 215 can obtain the reference information of the measurement control from the time acquisition module 212 or the source identification module 211 as a basis for the measurement control, such as the start time and the end time of the uplink optical signal, and the time after the time acquisition module 212 calculates the processing. The source identification module 211 identifies one or more combinations of the ONU identifiers, and the like.

As shown in FIG. 15, a line management device based on real-time detection of the presence or absence of an optical signal according to an embodiment of the present invention includes a source identification module 211, a power measurement module 213, a data uploading module 214, and a measurement control module 215.

The source identification module 211 may further include:

The signal detecting module 2113 is configured to detect the presence or absence of the uplink optical signal in real time, determine the start and end of the uplink optical signal according to the presence or absence of the uplink optical signal, and record the start time and the detected time when the uplink optical signal uploaded by the ONU is detected. The end time of the end of the upstream optical signal uploaded by the ONU;

The uplink frame parsing module 2111 is configured to detect the detection result according to the signal detecting module 2113. It is confirmed that when an ONU uploads data, it parses the frame of the uplink optical signal received by the Extender, obtains the ONU identifier, and determines the source of the uplink optical signal.

The measurement control module 215 obtains the identification information of the source of the uplink optical signal (such as the start time and the end time of the ONU's upstream optical signal reaching the Extender, one or more combinations of the ONU identifier, etc.), and provides the identification information of the currently measured uplink optical signal to the The data upload module 214, and the control power measurement module 213 begin measuring and ending the measurement.

As shown in FIG. 16 , a line management apparatus for recording an uplink optical signal transmission time according to an embodiment of the present invention is configured to measure optical power of an uplink optical signal in an PON in which an Extender is added, including: a signal detection module 2114 , a power measurement module 213 and a data upload module 214.

The signal detecting module 2114 detects the presence or absence of the uplink optical signal in real time; the power measuring module 213 is configured to measure the optical power of the upstream optical signal after the Extender amplification or regeneration process and/or after the Extender amplification or regeneration process, and obtain the Measurement data related to the optical power of the upstream optical signal.

In addition, the line management device further includes a measurement control module 215, configured to control the power measurement module 213 to start optical power measurement or end optical power measurement according to the detection result of the signal detection module 2114, and record the start time and end time of the uplink optical signal. The measurement control module 215 detects the change of the uplink optical signal from scratch according to the signal detection module 2114, determines the start of the uplink optical signal uploaded by the ONU, and determines that the ONU uploads the uplink optical signal according to the change of the upstream optical signal from presence to no. End, and record the start time and end time of the upstream optical signal. The data uploading module 214 uploads the measurement data of the power measurement module 213 and the time information recorded by the measurement control module 215 to the optical line terminal OLT.

Through the technical solution described in the foregoing embodiments of the present invention, the method for implementing line management on the Extender for measuring the uplink optical power is adopted, so that the OLT can accurately measure the transmission of each ONU without interrupting the service. Upstream optical power, measurement accuracy is better than one microwatt, measurement time is less than one microsecond; and according to the configuration of the system, only the upstream optical power of the ONU needs to be measured; Supporting 128 ONUs in one uplink frame time Optical power of all ONUs in the PON system; more accurate positioning of fault points and causes of failure, and easy system expansion, when adding new ONUs, not Need to increase the relevant configuration. Achieve the effect of improving system maintainability and reducing maintenance costs.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product that can be stored in a non-volatile storage medium.

(may be a CD-ROM, a USB flash drive, a removable hard drive, etc.), including a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for line management, characterized in that it comprises:

The identification information of the measurement data and the source of the upstream optical signal is uploaded.

The optical network line management method according to claim 1, wherein the identification information comprises: an ONU identifier of an optical network unit ONU that transmits the uplink optical signal, or the repeater measures the uplink The measurement time information of the optical signal, or the start time and end time of the ONU transmitting the upstream optical signal.

The method of line management according to claim 1 or 2, wherein the method for identifying a source of the uplink optical signal specifically includes:

Identifying a source of the uplink optical signal according to an ONU identifier included in a frame of the uplink optical signal received by the repeater; or

And identifying a source of the uplink optical signal according to ONU upload authorization information included in a frame of the downlink optical signal received by the repeater.

The method of line management according to claim 3, wherein the identifying the source of the uplink optical signal according to the ONU identifier included in the frame of the uplink optical signal received by the relay, specifically includes :

Parsing the frame in the uplink optical signal, and when parsing the ONU identifier in the frame, identifying the source of the uplink optical signal according to the ONU identifier, and further analyzing the length information of the uplink optical signal; or

Detecting the presence or absence of the uplink optical signal, when detecting the change of the uplink optical signal from scratch, starting to parse the frame in the uplink optical signal, and identifying the uplink optical signal according to the ONU identifier included in the frame origin of.

5. The method of line management according to claim 3, wherein said basis The ONU uploading authorization information included in the frame of the downlink optical signal received by the relay device identifies the source of the uplink optical signal, and specifically includes:

Obtain an ONU identifier for transmitting an upstream optical signal, and a start time and an end time for each ONU to send an uplink optical signal.

6. The method of line management according to claim 4, wherein said measuring said upstream optical signal is subjected to amplification or regeneration processing by a repeater and/or said upstream optical signal is amplified by said repeater or Obtaining measurement data related to the optical power of the uplink optical signal, which includes:

When the frame that is parsed into the uplink optical signal includes an ONU identifier, the measurement is started, and the end time of the uplink optical signal is estimated according to the length information of the uplink optical signal, and before the end time or the end time When the arrival, the measurement is ended; or when the change of the upstream optical signal is detected from scratch, the measurement is started, and when the change of the upstream optical signal from the presence to the end is detected, the measurement is ended.

7. An optical network system, comprising: an ONU, a repeater including a line management device, and an OLT:

The ONU is configured to send an uplink optical signal.

And the repeater for the device that includes the line management device is configured to perform amplification or regeneration processing on the uplink optical signal sent by the ONU, identify a source of the uplink optical signal, and obtain identification information of a source of the uplink optical signal, And measuring optical power after the uplink optical signal is subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater, and obtaining measurement data related to optical power of the uplink optical signal. And uploading, to the OLT, the measurement data and the identification information of the source of the uplink optical signal; the OLT, configured to receive the measurement data uploaded by the repeater of the device including the line management, and the Identification information of the source of the upstream optical signal.

The optical network system according to claim 7, wherein the device for managing the line includes:

a source identification module, configured to identify a source of the uplink optical signal;

An identification information acquiring module, configured to acquire identification information of a source of the uplink optical signal; a power measurement module, configured to learn, according to the identification information acquiring module, a start time and an end time of the uplink optical signal, and measure measurement data related to optical power of the uplink optical signal that is amplified or regenerated by the repeater ;

And a data uploading module, configured to upload measurement data of the power measurement module and the identification information acquired by the identification information acquiring module.

The optical network system according to claim 8, wherein the device for managing the line includes:

a signal detecting module, configured to detect presence or absence of the uplink optical signal;

a power measurement module, configured to learn, according to the detection result of the signal detection module, a start time and an end time of the uplink optical signal, and measure the uplink optical signal before and/or after the amplification or regeneration process by the repeater Determining the optical power after the repeater is amplified or regenerated, and obtaining measurement data related to the optical power of the upstream optical signal;

And a data uploading module, configured to upload measurement data of the power measurement module and start/end time information of the uplink optical signal to the OLT.

10. A device for line management, comprising:

a source identification module, configured to identify a source of the uplink optical signal, to obtain identification information of a source of the uplink optical signal;

a power measurement module, configured to measure, by the repeater, the uplink optical signal to amplify or reproduce measurement data related to optical power of the uplink optical signal;

And a data uploading module, configured to upload the measurement data obtained by the power measurement module and the identification information obtained by the source identification module.

The device for managing a line according to claim 10, wherein the source identification module comprises:

The uplink frame parsing module is configured to parse the frame of the uplink optical signal received by the repeater, and obtain length information of the ONU identifier and the uplink optical signal.

12. The device for line management according to claim 10, wherein the source identification module comprises:

The downlink frame parsing module is configured to parse the ONU upload authorization information included in the frame of the downlink optical signal received by the repeater, where the ONU upload authorization information includes a start time and an end time of the ONU upload.

The uplink frame parsing module is configured to parse the frame of the uplink optical signal received by the repeater according to the detection result of the signal detecting module, to obtain an ONU identifier.

14. A method of line management, characterized in that the method of line management comprises:

Detecting the presence or absence of an uplink optical signal from the optical network unit ONU received by the repeater, controlling the start optical power measurement and the ending optical power measurement according to the detection result of the signal detection module, and recording time information of the uplink optical signal, where Determining, according to the detection result of the signal detecting module, the starting optical power measurement, measuring the optical power of the upstream optical signal after being subjected to amplification or regeneration processing by the repeater and/or after being amplified or regenerated by the repeater. The measurement data related to the optical power of the uplink optical signal is obtained. After the optical power measurement is ended, the measurement data and the time information of the uplink optical signal are reported to the optical line terminal OLT.

15. A device for line management, characterized in that: the device for managing the line comprises:

a measurement control module, configured to control, according to the detection result of the signal detection module, the power measurement module to start optical power measurement or end optical power measurement, and record time information of the uplink optical signal; And a data uploading module, configured to upload measurement data of the power measurement module and time information of the uplink optical signal recorded by the measurement control module.