WO2013131336A1 - 一种检测光节点的光模块异常发光的方法及装置 - Google Patents
一种检测光节点的光模块异常发光的方法及装置 Download PDFInfo
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- WO2013131336A1 WO2013131336A1 PCT/CN2012/076867 CN2012076867W WO2013131336A1 WO 2013131336 A1 WO2013131336 A1 WO 2013131336A1 CN 2012076867 W CN2012076867 W CN 2012076867W WO 2013131336 A1 WO2013131336 A1 WO 2013131336A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Definitions
- the invention relates to a passive optical network (PON) technology in optical network communication, and in particular to a method and a device for detecting abnormal illumination of an optical module of an optical network unit (ONU).
- PON passive optical network
- ONU optical network unit
- the network topology of the PON is a point-to-multipoint physical topology.
- the PON consists of an optical cable terminal (OLT) and an ONU.
- the uplink communication of the PON uses time division multiple access (TDMA, Time Division Multiple Access).
- TDMA Time Division Multiple Access
- the method of sharing the bandwidth so when the optical modules in one or more ONUs managed by the OLT are not illuminated by the OLT, the normal services of other ONUs managed by the OLT are affected.
- One is a fault active detection and isolation method and an optical line unit disclosed in the patent application number CN200910110771.5: detecting the actual light-emitting state of the light-emitting device of the optical module of the ONU, and the time window for realizing the light-emitting state of the light-emitting device and the authorized assignment of the optical line terminal Comparing, when it is detected that the light emitter is still in the light-emitting state at the end of the time window authorized for distribution by the optical line terminal, further determining whether the light-emitting time outside the time window exceeds a preset time length, and if so, If the optical module is abnormal, the optical module is turned off.
- the patent can only monitor the status of the optical module within a preset length of time from the beginning to the end of the authorization allocation window, and cannot be after the preset time length after the end of the authorization allocation window.
- the status change of the optical module before the start of the secondary authorization allocation window cannot be monitored.
- the other is a passive optical network protection system and method disclosed in the patent application No.
- the illuminating detection unit compares the transmitted optical power of the optical transmitter of the terminal device with a predetermined threshold to obtain a detection result, and protects
- the control unit starts the transmission start timer and the transmission end timer when the terminal device starts transmitting the uplink data and ends the transmission of the uplink data; if the transmission start timer expires or the transmission end timer expires, and the protection control unit
- the protection control unit determines that the terminal device has failed, and turns off the optical transmitter of the terminal device.
- the duration of the transmission start timer or the transmission end timer in the solution is a fixed value set according to experience, and the transmission pulse duration allocated to the ONU in the PON may change according to the network condition, so the solution cannot be based on actual conditions.
- the length of the determination of the transmission start timer or the transmission end timer is adjusted in time, which may lead to misjudgment of the fault.
- an object of the present invention is to provide a method and a device for detecting an abnormal illumination of an optical module of an ONU, which can detect the abnormal illumination of the optical module of the ONU in a comprehensive and timely manner, thereby timely controlling abnormal illumination to be brought to other ONUs managed by the same OLT.
- the impact guarantees the reliability of the PON.
- the present invention provides a method for detecting abnormal illumination of an optical module of an ONU.
- the method includes: if the information is assigned according to the current uplink signal, determining that the duration of the uplink signal is abnormal, or If the transmission period of the uplink signal is abnormal, the transmission function of the optical module of the ONU is turned off; or if the current illumination indication signal is abnormal according to the preset interval parameter, or the interval between the uplink signals is determined to be abnormal, The sending function of the optical module of the ONU is disabled.
- the method before the assigning information according to the current uplink signal, the method further includes: the ONU saving the interval threshold between the delay threshold of the preset illumination indication signal and the uplink signal as the interval parameter; after the ONU is turned on, receiving the The signal transmission time, the signal transmission duration, and the dynamic bandwidth allocation (DBA, Dynamic Bandwidth Allocation) scheduling period sent by the OLT are saved as the current uplink signal assignment information.
- DBA Dynamic Bandwidth Allocation
- the determining whether the duration of the uplink signal is abnormal is: the real-time detection whether the pulse width timer is less than or equal to the signal transmission duration; if the pulse width timer is less than or equal to the signal transmission duration, and the uplink signal stops transmitting, The duration of the uplink signal is normal. If the pulse width timer is longer than the signal transmission duration and the uplink signal is not stopped, the duration of the uplink signal is abnormal.
- the method before the determining that the sending period of the uplink signal is abnormal, the method further includes: calculating, according to the received two uplink signal assignment information, a sending period of the uplink signal.
- the determining that the sending period of the current uplink signal is abnormal includes: detecting whether the uplink signal is sent again in real time, and recording the duration of the current period timer when detecting that the uplink signal is sent again; determining the current period timer The duration is the same as the calculated period of the uplink signal. If they are the same, the transmission period of the uplink signal is normal. Otherwise, the transmission period of the uplink signal is abnormal.
- the determining that the current illumination indication signal is abnormal includes: when the uplink signal is stopped, turning on a delay timer, detecting whether the illumination indication signal is stopped in real time, and detecting whether the delay timer is less than or equal to the illumination in real time.
- the delay threshold of the indication signal if the delay timer is less than or equal to the delay threshold of the illumination indication signal, and the illumination indication signal is stopped, then The light indication signal is normal; if the delay timer is greater than the delay threshold of the illumination indication signal, and the illumination indication signal is not stopped, the illumination indication signal is abnormal.
- the determining that the interval between the uplink signals is abnormal includes: opening an interval timer when the illuminating indication signal is stopped, detecting whether to start transmitting the uplink signal in real time, and detecting whether the interval timer is less than or equal to the uplink signal in real time. Interval threshold; if the interval timer is less than or equal to the interval threshold between the uplink signals, and the uplink signal is sent again, the interval between the uplink signals is normal; if the interval timer is greater than the interval threshold between the uplink signals, and there is no When the uplink signal is sent again, the interval between the uplink signals is abnormal.
- the present invention also provides an apparatus for detecting abnormal illumination of an optical module of an ONU, the apparatus comprising: an abnormal illumination detection module and an optical module;
- the abnormal illuminating detection module is configured to: if the time of the uplink signal is abnormal according to the current uplink signal assignment information, or determine that the sending period of the current uplink signal is abnormal, shut down the sending function of the optical module of the ONU; or If the current illuminating indication signal is abnormal according to the preset interval parameter, or the interval between the uplink signals is determined to be abnormal, the sending function of the optical module of the ONU is turned off;
- the optical module is configured to receive a control function of the abnormal illuminating detection module to turn off its own sending function.
- the device further includes: a control module, configured to parse the downlink signal sent by the optical module, and use the signal sending time, the signal sending duration, and the DBA scheduling period of the uplink signal in the downlink signal as the current uplink signal assignment information.
- the abnormal illuminating detection module is configured to save the preset interval parameter, and when the ONU is turned on, receive and save the current uplink signal assignment information sent by the control module;
- the optical module is further configured to send a downlink signal sent by the OLT to the control module.
- the abnormal illuminating detection module is specifically configured to detect whether the pulse width timer is less than or equal to the signal sending time in real time, and if the pulse width timer is less than or equal to the signal sending duration, And receiving the notification that the uplink signal stops transmitting, the duration of the uplink signal is normal. If the pulse width timer is longer than the signal transmission duration, and the notification that the uplink signal stops transmitting is not received, the uplink signal is The duration is not normal.
- the abnormal luminescence detection module is further configured to calculate a transmission period of the uplink signal according to the received uplink signal assignment information.
- the abnormal illuminating detection module is specifically configured to detect whether a retransmission of an uplink signal is received in real time, and when detecting that an uplink signal is sent again, record a duration of a current period timer; and determine a duration of the current period timer. Whether the period of the calculated uplink signal is the same, if the same, the transmission period of the uplink signal is normal, otherwise, the transmission period of the uplink signal is abnormal.
- the abnormal illuminating detection module is specifically configured to: when receiving the notification of stopping sending the uplink signal, turn on the delay timer, detect whether the illuminating indication signal is stopped in real time, and detect whether the delay timer is less than The delay threshold equal to the preset illumination indication signal; if the delay timer is less than or equal to the delay threshold of the illumination indication signal, and the illumination indication signal stops, the illumination indication signal is normal; if the delay timer is greater than the delay of the illumination indication signal When the time threshold is reached and the illumination indication signal is not stopped, the illumination indication signal is abnormal.
- the abnormal illuminating detection module is specifically configured to: when the illuminating indication signal is stopped, turn on the interval timer, detect in real time whether there is a notification to start transmitting the uplink signal again, and detect whether the interval timer is less than or equal to the preset uplink in real time.
- the interval threshold between the signals if the interval timer is less than or equal to the interval threshold between the uplink signals, and the uplink signal is sent again, the interval between the uplink signals is normal; if the interval timer is greater than the interval threshold between the uplink signals, If the uplink signal is not sent again, the interval between the uplink signals is abnormal.
- the method and device for detecting abnormal light emission of an optical module of an ONU avoids the present by detecting the duration of the uplink signal, the transmission period of the uplink signal, the current illumination indication signal, and the interval between the uplink signals. After the next uplink signal is sent, the next time it is sent Before the transmission of the line signal, the abnormal illumination problem of the optical module cannot be monitored for a period of time; in addition, the duration of the uplink signal and the transmission period of the current uplink signal are detected according to the uplink signal assignment information received in real time, thereby avoiding being unable to be timely according to the actual situation.
- FIG. 1 is a schematic flow chart of a method for detecting abnormal illumination of an optical module of an ONU according to the present invention
- FIG. 2 is a schematic structural diagram of a device for detecting abnormal illumination of an optical module of an ONU according to the present invention.
- the basic idea of the present invention is: if the information of the current uplink signal is used to determine that the duration of the current uplink signal is abnormal, or the transmission period of the current uplink signal is abnormal, the transmission function of the optical module of the ONU is turned off; or If it is determined that the current illumination indication signal is abnormal according to the preset interval parameter, or it is determined that the interval between the uplink signals is abnormal, the transmission function of the optical module of the ONU is turned off.
- the uplink signal assignment information is that the OLT specifies a downlink signal that is sent to the ONU according to the Multi-Point Control Protocol (MPCP) of the prior art, and includes: a signal transmission time of the uplink signal, a signal transmission duration, and DBA scheduling period, etc.;
- MPCP Multi-Point Control Protocol
- the interval parameter includes: a delay threshold of the illuminating indication signal and an interval threshold between the uplink signals; wherein, the delay threshold of the illuminating indication signal is a preset time value according to an actual situation, and an actual illuminating indication is generated in the ONU
- the performance of the voltage comparator used by the signal is related. For example, if a high-speed voltage comparator in the prior art is used, the delay threshold can be preset to 40 ns; the generation and transmission of the illuminating indication signal are all optical modules of the ONU. Existing technology Surgery, do not repeat here;
- the interval threshold between the uplink signals is a time value set according to an actual situation, and may be preset according to a pulse period in the PON, for example, may be 100 us.
- the method for detecting abnormal illumination of an optical module of an ONU provided by the present invention includes the following steps:
- Step 101 The ONU saves the preset interval parameter. After the ONU is turned on, the uplink signal assignment information sent by the OLT is received and saved.
- Step 102 When the ONU starts to send the uplink signal, the pulse width timer (T1) and the cycle timer (T2) are turned on.
- Step 103 According to the signal transmission duration in the uplink signal assignment information, determine whether the duration of the current uplink signal is normal. If yes, go to step 104; if not, go to step 108.
- the determining includes: detecting whether T1 is less than or equal to the signal transmission duration in real time; if T1 is less than or equal to the signal transmission duration, and the uplink signal stops transmitting, the duration of the current uplink signal is normal; if T1 is greater than the signal transmission duration, and If the uplink signal does not stop, the duration of the uplink signal is abnormal.
- Step 104 Determine whether the current illumination indication signal is normal according to the delay threshold of the illumination indication signal in the interval parameter. If yes, perform step 105; otherwise, perform step 108.
- the determining includes: when the sending of the uplink signal is stopped, turning on the delay timer (T3), detecting whether the lighting indication signal is stopped in real time, and detecting in real time whether the T3 is less than or equal to the delay threshold of the lighting indication signal; If the delay threshold is less than or equal to the illumination indication signal, and the illumination indication signal is stopped, the illumination indication signal is normal; if T3 is greater than the delay threshold of the illumination indication signal, and the illumination indication signal is not stopped, the illumination indication signal is abnormal.
- T3 delay timer
- Step 105 Determine whether to receive the uplink signal assignment information sent by the OLT again, if not If yes, go to step 106; if yes, go to step 107.
- Step 106 Determine whether the interval between the uplink signals is normal according to the interval threshold between the uplink signals in the interval parameter. If yes, return to step 105. If not, go to step 108.
- the determining includes: turning on the interval timer (T4) when detecting that the lighting indication signal is stopped, detecting whether to start transmitting the uplink signal again in real time, and detecting in real time whether T4 is less than or equal to an interval threshold between the uplink signals; if T4 is smaller than Equal to the interval threshold between the uplink signals, and the uplink signal is sent again, the interval between the uplink signals is normal; if T4 is greater than the interval threshold between the uplink signals, and the uplink signal is not sent again, the interval between the uplink signals unusual.
- Step 107 Using the calculated transmission period of the uplink signal, determine whether the transmission period of the current uplink signal is normal. If it is normal, the detection result of the optical module of the ONU is that there is no abnormal condition, and the processing flow ends; otherwise, step 108 is performed.
- the calculated transmission period of the uplink signal is calculated according to the two uplink signal assignment information allocated by the OLT, and the calculation method may be the difference between the two signal transmission times, or may be the DBA scheduling period allocated according to the OLT.
- the difference between the signal transmission time of the uplink signal and the last signal transmission time; the specific calculation method can be set by the manager according to the actual situation;
- Whether the determination is normal whether the ONU starts to send an uplink signal again in real time, and when detecting that the ONU starts to send an uplink signal, records the duration of the current T2; determines whether the currently recorded T2 duration and the calculated uplink signal period are The same, if the same, the transmission period of the uplink signal is normal, otherwise, the transmission period of the uplink signal is abnormal.
- Step 108 Turn off the sending function of the optical module of the ONU.
- the shutdown can be implemented by turning off the power supply of the LED in the optical module circuit of the ONU, or by turning off the power supply of the optical module of the optical module.
- the formula is prior art and will not be described here.
- step 108 subsequent operations may be performed according to the determination condition of step 108, for example: when the condition of step 108 is that the current illumination indication signal is abnormal, or the interval between the uplink signals is abnormal, then the ONU is If the optical module is faulty, the ONU can be reset to the static state and then reset. Then, according to the prior art, the information sent by the OLT is started, and step 101 is performed.
- step 108 When the condition of step 108 is that the duration of the uplink signal is abnormal, or the transmission period of the uplink signal is abnormal, the test mode may be entered, and the following steps are performed:
- Step a Turn on T1 and T2 when the ONU starts to send the uplink test signal.
- the uplink test signal is an ONU sending an uplink signal according to a preset test signal transmission time, a test signal transmission length, and a test signal transmission period.
- Step b Determine whether the current uplink test signal is normal. If it is normal, go to step c. If it is not normal, go to step d.
- the determining includes: the ONU sends an uplink test signal, and detects in real time whether T1 is less than or equal to the signal transmission duration; if T1 is less than or equal to the signal transmission duration, and the uplink signal stops transmitting, the duration of the uplink test signal is normal; if T1 If the signal transmission time is longer than the uplink signal, and the uplink signal does not stop, the duration of the uplink test signal is abnormal.
- Step c Determine whether the sending period of the uplink test signal is normal. If it is normal, determine that the optical module of the ONU does not have a controlled abnormality, and end the processing flow; otherwise, perform step d.
- the determination is: detecting whether the ONU starts to send an uplink test signal again in real time, and when detecting that the ONU starts to send an uplink test signal, recording the duration of the current T2; whether the duration of the current T2 is the same as the preset test signal transmission period, If they are the same, the transmission period of the uplink test signal is normal; otherwise, the transmission period of the uplink test signal is abnormal.
- Step d Determine that the optical module of the ONU sends a controlled function abnormality, and disable the sending function of the optical module of the ONU. Further, after the step d is completed, the optical module may be subsequently detected and repaired according to the prior art, and no further details are provided herein. After the detection and repair are completed, step 101 is started.
- the present invention provides an abnormal light emitting device for detecting an ONU, as shown in FIG. 2, including: an abnormal light emitting detecting module 21 and an optical module 22;
- the abnormal illuminance detecting module 21 is configured to: if the time of the uplink signal is abnormal according to the current uplink signal assignment information, or determine that the sending period of the current uplink signal is abnormal, the function of transmitting the optical module 22 of the ONU is turned off; Or, if it is determined that the current illumination indication signal is abnormal according to the preset interval parameter, or that the interval between the uplink signals is abnormal, the transmission function of the optical module 22 of the ONU is turned off;
- the optical module 22 is configured to receive the transmission function of the abnormal illumination detection module 21 to turn off its own transmission function.
- the optical module 22 has all the functions of the optical module of the ONU specified in the prior art, and details are not described herein.
- the device further includes: a control module 23, configured to parse the downlink signal sent by the optical module 22, and send, as the uplink signal assignment information, the signal sending time, the signal sending duration, and the DBA scheduling period of the uplink signal in the downlink signal to
- the abnormal illuminance detecting module 21 is configured to save the preset interval parameter, and when the ONU is turned on, receive and save the current uplink signal assignment information sent by the control module 23;
- the light module 22 is further configured to send the downlink signal sent by the OLT to the control module 23.
- the control module 23 is configured to notify the optical module 22 and the abnormal illuminating detection module 21 to start sending the current uplink signal.
- the optical module 22 is specifically configured to receive the control of the control module 23;
- the module 21 is specifically configured to: after receiving the notification sent by the control module 23 to start sending the uplink signal, turn on T2 and T1.
- the abnormal luminescence detection module 21 is specifically configured to use the current uplink signal assignment information.
- the signal transmission duration is determined whether the duration of the current uplink signal is normal. If it is normal, it is determined whether the illumination indication signal is normal. If not, the transmission function of the optical module 22 of the ONU is turned off, and the control module 23 is notified of this time.
- the duration of the uplink signal is abnormal.
- the control module 23 is further configured to receive the notification that the duration of the uplink signal sent by the abnormal illuminance detection module 21 is abnormal, and save the notification as a detection result.
- the abnormal illuminance detection module 21 is specifically configured to detect whether the T1 is less than or equal to the signal transmission duration in real time. If T1 is less than or equal to the signal transmission duration, and the notification sent by the control module 23 stops transmitting the uplink signal, the current time is The duration of the uplink signal is normal. If T1 is greater than the signal transmission duration, and the notification of the transmission of the uplink signal is stopped, the duration of the uplink signal is abnormal.
- the control module 23 is further configured to notify the light.
- the module 22 and the abnormal illuminance detecting module 21 stop transmitting the current uplink signal.
- the abnormal illuminating detection module 21 is configured to determine whether the illuminating indication signal of the optical module 22 is normal according to the delay threshold of the illuminating indication signal in the interval parameter, and if it is normal, determine whether the control module 23 is received again. Uplink signal assignment information, if not, shutting down the function of the optical module 22 of the ONU, and notifying the control module 23 that the illumination indication signal of the optical module 22 is abnormal; correspondingly, the control module 23 is further configured to receive abnormal illumination. The notification that the light-emitting instruction signal of the optical module 22 sent from the detection module 21 is abnormal is saved as a detection result.
- the abnormal illuminating detection module 21 is specifically configured to: when the notification of the stop of the uplink signal is received, turn on T3, detect whether the illuminating indication signal sent by the optical module 22 is stopped, and detect in real time whether the T3 is less than or equal to the delay of the illuminating indication signal. Time threshold, if T3 is less than or equal to the delay threshold of the illumination indication signal, and the illumination indication signal is stopped, the illumination indication signal is normal. If T3 is greater than the delay threshold of the illumination indication signal, and the illumination indication signal is not stopped, the illumination indication signal is not normal.
- the abnormal luminescence detection module 21 is specifically configured to use an uplink signal according to the interval parameter. If the interval between the uplink signals is normal, if it is normal, it continues to determine whether to receive the uplink signal assignment information sent by the control module 23 again. If not, the transmission of the optical module 22 of the ONU is turned off. The function and the notification control module 23 are not normal in the interval between the uplink signals. Correspondingly, the control module 23 is further configured to receive the notification that the interval between the uplink signals sent by the abnormal illuminance detection module 21 is abnormal. Save it.
- the abnormal illuminating detection module 21 is specifically configured to detect whether the interval between the uplink signals is normal.
- T4 is turned on, and the real-time detection control module 23 sends out an uplink signal again.
- the T4 is turned on, and the real-time detection control module 23 sends out an uplink signal again.
- the T4 is less than or equal to the interval threshold between the preset uplink signals, and if the T4 is less than or equal to the interval threshold between the uplink signals, and receiving the notification sent by the control module 23 to start transmitting the uplink signal again, the uplink signal
- the interval between the uplink signals is normal. If the interval between T1 is greater than the interval threshold between the uplink signals and the uplink signal is not received from the control module 23, the interval between the uplink signals is abnormal.
- the abnormal illuminating detection module 21 is configured to determine whether the sending period of the uplink signal is normal by using the calculated sending period of the uplink signal, and if not, notify the optical module 22 of the ONU where the control module 23 is located that there is no abnormal condition, otherwise The sending function of the optical module 22 of the ONU is turned off, and the transmission module of the control module 23 is notified that the transmission period of the uplink signal is abnormal.
- the control module 23 is further configured to receive the sending of the uplink signal sent by the abnormal illuminating detection module 21.
- the notification that the cycle is abnormal is stored as the detection result, and the notification that the optical module 22 of the ONU that is sent by the abnormal illuminance detection module 21 is not abnormal is stored as the detection result.
- the abnormal illuminance detection module 21 is further configured to perform calculation according to two uplink signal assignment information, and the calculation method may be a difference between two signal transmission times, or may be a signal transmission time of adding an uplink signal according to a DBA scheduling period. The difference between the last signal transmission time.
- the abnormal luminescence detection module 21 is further configured to detect whether the control module 23 is received in real time. The sent notification of the uplink signal is sent again. If it is detected, the duration of the current T2 is recorded, and it is determined whether the current duration of T2 is the same as the calculated period of the current uplink signal. If they are the same, the transmission period of the uplink signal is normal. Otherwise, the transmission period of the uplink signal is abnormal.
- the control module 23 is further configured to select the entry into the test mode according to the actual operation, and notify the optical module 22 and the abnormal illumination detection module 21 to start transmitting the uplink test signal.
- the abnormal illumination detection module 21 is specifically configured to be used according to the control. At the beginning of module 23, a notification of the uplink test signal is sent, and T1 and T2 are turned on.
- the abnormal illuminating detection module 21 is further configured to determine whether the duration of the current uplink test signal is normal. If the duration of the current uplink test signal is normal, it is determined whether the sending period of the uplink test signal is normal, and if the sending period of the uplink test signal is normal.
- the optical module 22 of the ONU does not have a controlled abnormality, and the optical module 22 of the ONU of the ONU is notified that the controlled function of the optical module 22 of the ONU is not abnormal. Otherwise, the ONU of the optical module 22 of the ONU is abnormal. If the current optical module 22 of the ONU is abnormal, the optical module 22 of the ONU is abnormal, and the ONU of the ONU is closed.
- the transmission function of the optical module 22 and the notification that the transmission control function of the optical module 22 of the ONU where the control module 23 is located is abnormal;
- control module 23 is further configured to receive, as a detection result, a notification that the transmission control function of the optical module 22 where the abnormal illuminance detection module 21 is located is abnormal or does not have a controlled abnormality.
- the abnormal illuminating detection module 21 is specifically configured to detect whether the T1 is less than or equal to the signal transmission time in real time. If T1 is less than or equal to the signal transmission duration and the current uplink test signal stops transmitting, the current uplink test signal has a normal width, if T1 is greater than the signal. If the transmission duration is long and the current uplink test signal is not stopped, the width of the current uplink test signal is abnormal.
- the abnormal luminescence detection module 21 is specifically configured to be used according to a preset uplink test signal
- the real-time detection control module 23 sends a notification of the uplink test signal again. If it is received, the duration of the current T2 is recorded, and it is determined whether the duration of T2 is the same as the period of the preset uplink test signal. If they are the same, the uplink test signal is The sending period is normal. Otherwise, the sending period of the uplink test signal is abnormal. It is determined that the transmitting function of the optical module 22 is faulty. The function of sending the optical module 22 is turned off, and subsequent detection and maintenance work is performed according to the prior art. After the detection and maintenance, the administrator can set the operation mode, notify the optical module 22 to start accepting the current signal transmission time allocated by the OLT, and send an uplink signal to the OLT.
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Abstract
本发明公开了一种检测光节点(ONU)的光模块异常发光的方法,包括:若根据本次上行信号指派信息,检测到本次上行信号的时长不正常、或检测到本次上行信号的发送周期不正常,则关闭ONU的光模块的发送功能;或者,若根据预置的间隔参数,检测到当前激光器发光指示信号不正常、或检测到上行信号之间的间隔不正常,则关闭ONU的光模块的发送功能。本发明还同时公开了一种检测ONU的光模块异常发光的装置,采用本发明能全面、及时检测ONU的光模块异常发光,从而及时控制异常发光给光缆终端设备(OLT)同一个接口下管理的其他ONU带来的影响,进而保证无源光网络(PON)的可靠性。
Description
一种检测光节点的光模块异常发光的方法及装置 技术领域
本发明涉及光网络通信中的无源光网络 ( PON , Passive Optical Network )技术, 尤其涉及一种检测光节点 (ONU, Optical Network Unit ) 的光模块异常发光的方法及装置。 背景技术
随着光通信技术的不断发展, PON的应用也越来越广泛。 PON的网络 拓朴结构为点到多点的物理拓朴结构, PON由光缆终端设备(OLT, Optical Line Terminal )和 ONU组成, 由于 PON的上行通信釆用时分多址( TDMA, Time Division Multiple Access )共享带宽的方式, 所以当 OLT同一个接口下 管理的一个或多个 ONU中的光模块不受 OLT控制出现异常发光时, 就会 影响到该 OLT管理的其他 ONU的正常业务。
目前, 为了解决上述 ONU的光模块异常发光的问题, 已提出以下两个 解决方案:
一个是专利申请号为 CN200910110771.5公开的一种故障主动检测隔离 方法和光线路单元: 检测 ONU的光模块的光发射器实际发光状态, 将光发 射器实际发光状态和光线路终端授权分配的时间窗口进行比较, 当检测到 光发射器在本次光线路终端授权分配的时间窗结束时仍处于发光状态时, 进一步判断其在时间窗外的发光时间是否超过预先设定的时间长度, 如果 超过, 则判定光模块异常, 关闭光模块。 但是, 该专利只能在本次授权分 配窗口开始至结束后的预设的时间长度内对光模块状态进行监控, 不能对 本次授权分配窗口结束后的预设的时间长度结束后、 到下次授权分配窗口 开始之前的光模块状态变化无法进行监控。
另一个是专利申请号为 CN200710087367.1公开的一种无源光网络保护 系统及方法, 包括: 发光检测单元将终端设备的光发射机的发射光功率与 预定门限进行比较得到检测结果, 并且保护控制单元分别在所述终端设备 开始发送上行数据时、 以及结束发送上行数据时, 开启发送开始定时器和 发送结束定时器; 若发送开始定时器超时或发送结束定时器超时、 并且保 护控制单元中保存的检测结果为发射光功率不小于所述预定门限时, 保护 控制单元判定终端设备发生故障, 关闭终端设备的光发射机。 但是, 该方 案中的发送开始定时器或发送结束定时器的时长为根据经验设置的固定 值,而 PON中为 ONU分配的发送脉冲时长可能会根据网络情况发生变化, 所以该方案无法根据实际情况及时调整判定发送开始定时器或发送结束定 时器的时长, 进而可能导致误判故障。
可见, 上述方案, 虽然都能在一定程度上解决 ONU的光模块异常发光 问题, 但是, 要么不能对本次授权分配窗口结束后的预设的时间长度结束 后、 到下次授权分配窗口开始之前监控光模块异常发光问题; 要么不能根 据实际情况及时调整判定发送开始定时器超时或发送结束定时器超时的依 据,进而可能导致误判故障。显然, 目前已有的 ONU异常发光的解决方法, 无法满足全面、 及时检测 ONU的光模块异常发光, 从而无法及时控制异常 发光给相同 OLT管理的其他 ONU带来的影响, 进而影响 PON的可靠性。 发明内容
有鉴于此,本发明的目的在于提供一种检测 ONU的光模块异常发光的 方法及装置, 能全面、 及时检测 ONU的光模块异常发光, 从而及时控制异 常发光给相同 OLT管理的其他 ONU带来的影响,进而保证 PON的可靠性。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种检测 ONU的光模块异常发光的方法, 该方法包括: 若根据本次上行信号指派信息, 判定本次上行信号的时长不正常、 或判
定本次上行信号的发送周期不正常, 则关闭 ONU的光模块的发送功能; 或者, 若根据预置的间隔参数, 判定当前发光指示信号不正常、 或判 定上行信号之间的间隔不正常, 则关闭 ONU的光模块的发送功能。
上述方案中, 所述根据本次上行信号指派信息之前, 该方法还包括: ONU 保存预置的发光指示信号的延时门限和上行信号之间的间隔门限 作为间隔参数; ONU开启后, 接收并保存 OLT发来的信号发送时间、 信号发送时长和动态带宽分配 (DBA, Dynamic Bandwidth Allocation ) 调度周期作为本次上行信号指派信息。
上述方案中, 所述判定本次上行信号的时长不正常, 包括: 实时检 测脉宽计时器是否小于等于信号发送时长; 若脉宽计时器小于等于信号 发送时长、 且本次上行信号停止发送, 则本次上行信号的时长正常; 若 脉宽计时器大于信号发送时长、 且本次上行信号没有停止, 则本次上行 信号的时长不正常。
上述方案中, 所述判定本次上行信号的发送周期不正常之前, 该方 法还包括: 根据接收到的两次上行信号指派信息计算得出上行信号的发 送周期。
上述方案中, 所述判定本次上行信号的发送周期不正常, 包括: 实 时检测是否再次发出上行信号, 当检测到再次发出上行信号时, 记录当 前周期计时器的时长; 判断当前周期计时器的时长与计算得出的上行信 号的周期是否相同, 若相同, 则上行信号的发送周期正常, 否则, 上行 信号的发送周期不正常。
上述方案中, 所述判定当前发光指示信号不正常, 包括: 当停止发 送本次上行信号时, 开启延时计时器, 实时检测发光指示信号是否停止、 并实时检测延时计时器是否小于等于发光指示信号的延时门限; 若延时 计时器小于等于发光指示信号的延时门限、 且发光指示信号停止, 则发
光指示信号正常; 若延时计时器大于发光指示信号的延时门限、 且发光 指示信号没有停止, 则发光指示信号不正常。
上述方案中, 所述判定上行信号之间的间隔不正常, 包括: 当发光 指示信号停止时开启间隔计时器,实时检测是否开始再次发送上行信号、 并实时检测间隔计时器是否小于等于上行信号之间的间隔门限; 若间隔 计时器小于等于上行信号之间的间隔门限、 且开始再次发送上行信号, 则上行信号之间的间隔正常; 若间隔计时器大于上行信号之间的间隔门 限、 且没有再次发送上行信号, 则上行信号之间的间隔不正常。
本发明还提供了一种检测 ONU的光模块异常发光的装置, 该装置包 括: 异常发光检测模块和光模块; 其中,
异常发光检测模块, 用于若根据本次上行信号指派信息, 判定本次 上行信号的时长不正常、 或判定本次上行信号的发送周期不正常, 则关 闭所在 ONU的光模块的发送功能; 或者, 若根据预置的间隔参数, 判定 当前发光指示信号不正常、 或判定上行信号之间的间隔不正常, 关闭所 在 ONU的光模块的发送功能;
光模块, 用于接收异常发光检测模块的控制关闭自身的发送功能。 上述方案中, 所述装置还包括: 控制模块, 用于解析光模块发来的 下行信号, 将下行信号中的上行信号的信号发送时间、 信号发送时长和 DBA调度周期作为本次上行信号指派信息发送给异常发光检测模块; 相应的, 所述异常发光检测模块, 具体用于保存预置的间隔参数, 当所在 ONU 开启后, 接收并保存控制模块发来的本次上行信号指派信 息;
所述光模块, 还用于将 OLT发来的下行信号发送给控制模块。
上述方案中, 所述异常发光检测模块, 具体用于实时检测脉宽计时 器是否小于等于信号发送时长, 若脉宽计时器小于等于信号发送时长、
且收到本次上行信号停止发送的通知, 则本次上行信号的时长正常, 若 脉宽计时器大于信号发送时长、 且没有收到本次上行信号停止发送的通 知, 则本次上行信号的时长不正常。
上述方案中, 所述异常发光检测模块, 还用于根据接收到的两次上 行信号指派信息计算得出上行信号的发送周期。
上述方案中, 所述异常发光检测模块, 具体用于实时检测是否收到 再次发出上行信号的通知, 当检测到再次发出上行信号时, 记录当前周 期计时器的时长; 判断当前周期计时器的时长与计算得出的上行信号的 周期是否相同, 若相同, 则上行信号的发送周期正常, 否则, 上行信号 的发送周期不正常。
上述方案中, 所述异常发光检测模块, 具体用于当收到停止发送本 次上行信号的通知时, 开启延时计时器, 实时检测发光指示信号是否停 止、 并实时检测延时计时器是否小于等于预置的发光指示信号的延时门 限; 若延时计时器小于等于发光指示信号的延时门限、 且发光指示信号 停止, 则发光指示信号正常; 若延时计时器大于发光指示信号的延时门 限、 且发光指示信号没有停止, 则发光指示信号不正常。
上述方案中, 所述异常发光检测模块, 具体用于当发光指示信号停 止时开启间隔计时器, 实时检测是否有开始再次发送上行信号的通知、 并实时检测间隔计时器是否小于等于预置的上行信号之间的间隔门限; 若间隔计时器小于等于上行信号之间的间隔门限、 且开始再次发送上行 信号, 则上行信号之间的间隔正常; 若间隔计时器大于上行信号之间的 间隔门限、 且没有再次发送上行信号, 则上行信号之间的间隔不正常。
本发明所提供的检测 ONU的光模块异常发光的方法及装置,通过对本 次上行信号的时长、 上行信号的发送周期、 当前发光指示信号、 以及上 行信号之间的间隔进行检测,从而避免本次上行信号发送完成后到下次上
行信号发送之前, 出现一段时间无法监控光模块异常发光问题; 另外, 通 过根据实时接收的上行信号指派信息检测本次上行信号的时长、 本次上 行信号的发送周期, 从而避免不能根据实际情况及时调整判定发送开始定 时器超时或发送结束定时器超时的依据的问题;从而全面、及时的检测 ONU 的光模块异常发光, 及时控制异常发光给相同 OLT管理的其他 ONU带来 的影响, 进而保证 PON的可靠性。 附图说明
图 1为本发明检测 ONU的光模块异常发光的方法流程示意图; 图 2为本发明检测 ONU的光模块异常发光的装置的组成结构示意图。 具体实施方式
本发明的基本思想是: 若根据本次上行信号指派信息, 判定本次上 行信号的时长不正常、 或判定本次上行信号的发送周期不正常, 则关闭 ONU 的光模块的发送功能; 或者, 若根据预置的间隔参数, 判定当前发 光指示信号不正常、 或判定上行信号之间的间隔不正常, 则关闭 ONU的 光模块的发送功能。
其中,所述上行信号指派信息为 OLT根据现有技术的多点控制协议 ( MPCP, Multi-Point Control Protocol )规定向 ONU发送的下行信号, 其中包括: 上行信号的信号发送时间、 信号发送时长和 DBA 调度周期 等;
所述间隔参数包括: 发光指示信号的延时门限和上行信号之间的间 隔门限; 其中, 所述发光指示信号的延时门限为根据实际情况预置的时 间值, 与 ONU 中实际产生发光指示信号所使用的电压比较器的性能相 关, 比如, 若使用现有技术中的高速电压比较器, 则可以预置延时门限 为 40ns; 所述发光指示信号的产生及发送均为 ONU的光模块的现有技
术, 这里不做赘述;
所述上行信号之间的间隔门限为根据实际情况设置的时间值, 可以 根据 PON中的脉冲周期进行预置, 比如, 可以为 100us。
下面结合附图及具体实施例对本发明再作进一步详细的说明。
本发明提供的一种检测 ONU的光模块异常发光的方法, 如图 1所示, 包括以下步骤:
步骤 101 : ONU保存预置的间隔参数; ONU开启后, 接收并保存 OLT发来的本次上行信号指派信息。
步骤 102: ONU开始发送本次上行信号时, 开启脉宽计时器 (T1 ) 和周期计时器 (T2 ) 。
步骤 103 : 根据本次上行信号指派信息中的信号发送时长, 判断本 次上行信号的时长是否正常, 若正常, 则执行步骤 104; 若不正常, 则 执行步骤 108。
这里, 所述判断包括: 实时检测 T1 是否小于等于信号发送时长; 若 T1 小于等于信号发送时长、 且本次上行信号停止发送, 则本次上行 信号的时长正常; 若 T1大于信号发送时长、 且本次上行信号没有停止, 则本次上行信号的时长不正常。
步骤 104: 根据间隔参数中的发光指示信号的延时门限, 判断当前 发光指示信号是否正常, 若正常, 则执行步骤 105 ; 否则,执行步骤 108。
这里, 所述判断包括: 当停止发送本次上行信号时, 开启延时计时 器 (T3 ) , 实时检测发光指示信号是否停止、 并实时检测 T3 是否小于 等于发光指示信号的延时门限; 若 T3 小于等于发光指示信号的延时门 限、 且发光指示信号停止, 则发光指示信号正常; 若 T3 大于发光指示 信号的延时门限、 且发光指示信号没有停止, 则发光指示信号不正常。
步骤 105 : 判断是否再次收到 OLT发来的上行信号指派信息, 若没
收到, 则执行步骤 106; 若收到, 则执行步骤 107。
步骤 106: 根据间隔参数中的上行信号之间的间隔门限, 判断上行 信号之间的间隔是否正常, 若正常, 则返回步骤 105 ; 若不正常, 则执 行步骤 108。
这里, 所述判断包括: 当检测到发光指示信号停止时开启间隔计时 器 (T4 ) , 实时检测是否再次开始发送上行信号、 并实时检测 T4是否 小于等于上行信号之间的间隔门限; 若 T4 小于等于上行信号之间的间 隔门限、 且再次开始发送上行信号, 则上行信号之间的间隔正常; 若 T4 大于上行信号之间的间隔门限、 且没有再次发送上行信号, 则上行信号 之间的间隔不正常。
步骤 107: 利用计算得到的上行信号的发送周期, 判断本次上行信 号的发送周期是否正常, 若正常, 则 ONU 的光模块的检测结果为没有 异常状况, 结束处理流程; 否则, 执行步骤 108。
这里 ,所述计算得到的上行信号的发送周期为根据 OLT分配的两次 上行信号指派信息进行计算, 计算方法可以为两次信号发送时间之差, 也可以为根据 OLT分配的 DBA调度周期加即将发送上行信号的信号发 送时间与上次信号发送时间之差; 具体釆用哪种计算方法可以根据实际 情况、 由管理人员设定;
所述判断是否正常为: 实时检测 ONU是否再次开始发出上行信号, 当检测到 ONU开始发出上行信号时, 记录当前 T2的时长; 判断当前记 录的 T2 的时长与计算得出的上行信号的周期是否相同, 若相同, 则上 行信号的发送周期正常, 否则, 上行信号的发送周期不正常。
步骤 108: 关闭 ONU的光模块的发送功能。
这里, 所述关闭可以通过关闭 ONU 的光模块电路中发光二极管的 供电电源实现、 也可以通过关闭光模块的发送端电源实现, 具体实现方
式为已有技术, 这里不做赘述。
另外, 步骤 108之后, 还可以根据进入步骤 108的判断条件, 进行 后续操作, 比如: 当进入步骤 108的条件为当前发光指示信号不正常、 或上行信号之间的间隔不正常时, 则 ONU 的光模块自身出现问题, 可 以按照现有技术将 ONU 置为静默状态后再复位, 再按照现有技术开始 接收 OLT下发的信息, 执行步骤 101。
当进入步骤 108的条件为本次上行信号的时长不正常、 或本次上行 信号的发送周期不正常时, 可以进入测试模式, 执行以下步骤:
步骤 a: ONU开始发送上行测试信号时开启 T1和 T2。
这里, 所述上行测试信号为 ONU按照预置的测试信号发送时间、 测试信号发送长度及测试信号发送周期发出上行信号。
步骤 b: 判断当前上行测试信号的时长是否正常, 若正常, 则执行 步骤 c; 若不正常, 则执行步骤 d。
这里, 所述判断包括: ONU发送上行测试信号, 并实时检测 T1是 否小于等于信号发送时长; 若 T1 小于等于信号发送时长、 且本次上行 信号停止发送, 则上行测试信号的时长正常; 若 T1大于信号发送时长、 且本次上行信号没有停止, 则上行测试信号的时长不正常。
步骤 c: 判断上行测试信号的发送周期是否正常, 若正常, 则确定 ONU的光模块没有出现受控异常, 结束处理流程; 否则, 执行步骤 d。
这里, 所述判断为: 实时检测 ONU是否再次开始发出上行测试信 号, 当检测到 ONU开始发出上行测试信号时, 记录当前 T2的时长; 当 前 T2 的时长与预置的测试信号发送周期是否相同, 若相同, 则上行测 试信号的发送周期正常; 否则, 上行测试信号的发送周期不正常。
步骤 d: 确定 ONU的光模块发送受控功能出现异常, 关闭 ONU的 光模块的发送功能。
进一步的, 上述步骤 d完成后, 可以按照现有技术对光模块进行后 续检测及维修工作, 这里不做赘述; 完成检测及维修后, 开始执行步骤 101。
本发明提出一种检测 ONU的光模块异常发光装置, 如图 2所示, 包 括: 异常发光检测模块 21和光模块 22; 其中,
异常发光检测模块 21 , 用于若根据本次上行信号指派信息, 判定本 次上行信号的时长不正常、 或判定本次上行信号的发送周期不正常, 则 关闭所在 ONU的光模块 22发送功能; 或者, 若根据预置的间隔参数, 判 定当前发光指示信号不正常、 或判定上行信号之间的间隔不正常, 关闭 所在 ONU的光模块 22的发送功能;
光模块 22, 用于接收异常发光检测模块 21 的控制关闭自身的发送功 能。
所述光模块 22具有现有技术中规定的 ONU的光模块所有功能, 这 里不做赘述。
所述装置还包括: 控制模块 23 , 用于解析光模块 22发来的下行信 号, 将下行信号中的上行信号的信号发送时间、 信号发送时长和 DBA 调度周期作为本次上行信号指派信息发送给异常发光检测模块 21 ; 相应 的, 所述异常发光检测模块 21 , 具体用于保存预置的间隔参数, 当所在 ONU开启后, 接收并保存控制模块 23发来的本次上行信号指派信息; 所述光模块 22 , 还用于将 OLT发来的下行信号发送给控制模块 23。
所述控制模块 23 , 具体用于通知光模块 22 以及异常发光检测模块 21开始发送本次上行信号; 相应的, 所述光模块 22 , 具体用于接收控制 模块 23 的控制; 所述异常发光检测模块 21 , 具体用于接收到控制模块 23发来的开始发送本次上行信号的通知后, 开启 T2以及 Tl。
所述异常发光检测模块 21 , 具体用于根据本次上行信号指派信息中
的信号发送时长, 判断本次上行信号的时长是否正常, 若正常, 则开始 判断发光指示信号是否正常, 若不正常, 则关闭所在 ONU 的光模块 22 的发送功能、 并通知控制模块 23本次上行信号的时长不正常; 相应的, 所述控制模块 23 , 还用于接收异常发光检测模块 21发来的本次上行信 号的时长不正常的通知作为检测结果进行保存。
所述异常发光检测模块 21 , 具体用于实时检测 T1是否小于等于信 号发送时长, 若 T1小于等于信号发送时长、 且收到控制模块 23发来的 停止发送本次上行信号的通知, 则本次上行信号的时长正常, 若 T1 大 于信号发送时长、 且为收到停止发送本次上行信号的通知, 则本次上行 信号的时长不正常; 相应的, 所述控制模块 23 , 还用于通知光模块 22 及异常发光检测模块 21停止发送本次上行信号。
所述异常发光检测模块 21 , 具体用于根据间隔参数中的发光指示信 号的延时门限, 判断光模块 22的发光指示信号是否正常, 若正常, 则判 断是否再次收到控制模块 23发来的上行信号指派信息, 若不正常, 则关 闭所在 ONU的光模块 22发送功能、 并通知控制模块 23光模块 22的发光 指示信号不正常; 相应的, 所述控制模块 23 , 还用于接收异常发光检测 模块 21发来的光模块 22的发光指示信号不正常的通知作为检测结果进 行保存。
所述异常发光检测模块 21 , 具体用于当收到本次上行信号停止的通 知时开启 T3 , 实时检测光模块 22发出的发光指示信号是否停止、 并实 时检测 T3是否小于等于发光指示信号的延时门限, 若 T3小于等于发光 指示信号的延时门限、 且发光指示信号停止, 则发光指示信号正常, 若 T3大于发光指示信号的延时门限、 且发光指示信号没有停止, 则发光指 示信号不正常。
所述异常发光检测模块 21 , 具体用于根据间隔参数中的上行信号之
间的间隔门限, 判断上行信号之间的间隔是否正常, 若正常, 则继续判 断是否再次收到控制模块 23发来的上行信号指派信息, 若不正常, 则关 闭所在 ONU的光模块 22的发送功能、 并通知控制模块 23上行信号之间 的间隔不正常; 相应的, 所述控制模块 23 , 还用于接收异常发光检测模 块 21发来的上行信号之间的间隔不正常的通知作为检测结果进行保存。
所述异常发光检测模块 21 , 具体用于检测上行信号之间的间隔是否 正常时, 当检测到光模块 22的发光指示信号停止时开启 T4 , 实时检测 控制模块 23是否再次发出开始发送上行信号、 并实时检测 T4是否小于 等于预置的上行信号之间的间隔门限, 若 T4 小于等于上行信号之间的 间隔门限、且收到控制模块 23发来的再次开始发送上行信号的通知, 则 上行信号之间的间隔正常, 若 T4 大于上行信号之间的间隔门限、 且没 收到控制模块 23发来的再次发送上行信号的通知,则上行信号之间的间 隔不正常。
所述异常发光检测模块 21 , 具体用于利用计算得到的上行信号的发 送周期, 判断上行信号的发送周期是否正常, 若正常, 则通知控制模块 23所在 ONU的光模块 22的没有异常状况, 否则, 关闭所在 ONU的光 模块 22的发送功能、 并通知控制模块 23上行信号的发送周期不正常; 相 应的, 所述控制模块 23 , 还用于接收异常发光检测模块 21发来的上行 信号的发送周期不正常的通知作为检测结果进行保存, 以及接收异常发 光检测模块 21发来的所在 ONU的光模块 22没有异常状况的通知作为 检测结果保存。
所述异常发光检测模块 21 , 还用于根据两次上行信号指派信息进行 计算, 计算方法可以为两次信号发送时间之差, 也可以为根据 DBA 调 度周期加即将发送上行信号的信号发送时间与上次信号发送时间之差。
所述异常发光检测模块 21 , 还用于实时检测是否收到控制模块 23
发出的再次发出上行信号的通知, 若检测到, 则记录当前 T2 的时长, 判断当前 T2 的时长与计算得出的当前的上行信号的周期是否相同, 若 相同, 则上行信号的发送周期正常, 否则, 上行信号的发送周期不正常。
所述控制模块 23 , 还用于根据实际操作选择进入测试模式, 则通知 光模块 22及异常发光检测模块 21开始发送上行测试信号; 相应的, 所 述异常发光检测模块 21 , 具体用于根据控制模块 23 的开始发送上行测 试信号的通知, 开启 T1和 T2。
所述异常发光检测模块 21 , 还用于判断当前上行测试信号的时长是 否正常, 若当前上行测试信号的时长正常, 则开始判断上行测试信号的 发送周期是否正常, 若上行测试信号的发送周期正常, 则确定 ONU 的 光模块 22没有出现受控异常、 并通知控制模块 23所在 ONU的光模块 22没有出现受控异常, 否则, 确定所在 ONU的光模块 22的发送受控功 能出现异常, 关闭 ONU的光模块 22 的发送功能、 并通知控制模块 23 所在 ONU的光模块 22出现异常; 若当前上行测试信号的时长不正常, 则确定 ONU的光模块 22发送受控功能出现异常, 关闭所在 ONU的光 模块 22的发送功能、 并通知控制模块 23所在 ONU的光模块 22的发送 受控功能出现异常;
相应的, 所述控制模块 23 , 还用于接收异常发光检测模块 21发来 的所在 0 N U的光模块 22的发送受控功能出现异常或没有出现受控异常 的通知作为检测结果。
所述异常发光检测模块 21 , 具体用于实时检测 T1是否小于等于信 号发送时长, 若 T1 小于等于信号发送时长、 且当前上行测试信号停止 发送, 则当前上行测试信号的宽度正常, 若 T1 大于信号发送时长、 且 当前上行测试信号没有停止, 则当前上行测试信号的宽度不正常。
所述异常发光检测模块 21 , 具体用于根据预置的上行测试信号的周
期, 实时检测控制模块 23是否再次发来上行测试信号的通知, 若接收到 则记录当前 T2的时长, 判断 T2的时长与预置的上行测试信号的周期是 否相同, 若相同, 则上行测试信号的发送周期正常, 否则, 上行测试信 号的发送周期不正常, 确定光模块 22 发送功能出现问题, 关闭光模块 22发送功能,再按照现有技术进行后续检测及维修工作,这里不做赘述, 完成检测及维修后, 可以由管理人员设置进入工作模式、 通知光模块 22 开始接受 OLT分配的本次信号发送时间及信号发送时长向 OLT发出上 行信号。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的 保护范围。
Claims
1、 一种检测光节点 ONU的光模块异常发光的方法, 其特征在于, 该 方法包括: 若根据本次上行信号指派信息, 判定本次上行信号的时长不 正常、 或判定本次上行信号的发送周期不正常, 则关闭 ONU的光模块的 发送功能;
或者, 若根据预置的间隔参数, 判定当前发光指示信号不正常、 或判 定上行信号之间的间隔不正常, 则关闭 ONU的光模块的发送功能。
2、 根据权利要求 1所述的方法, 其特征在于, 所述根据本次上行信 号指派信息之前, 该方法还包括: ONU保存预置的发光指示信号的延时 门限和上行信号之间的间隔门限作为间隔参数; ONU开启后, 接收并保 存光缆终端设备 OLT发来的信号发送时间、 信号发送时长和动态带宽分 配 DBA调度周期作为本次上行信号指派信息。
3、 根据权利要求 1所述的方法, 其特征在于, 所述判定本次上行信 号的时长不正常, 包括: 实时检测脉宽计时器是否小于等于信号发送时 长; 若脉宽计时器小于等于信号发送时长、 且本次上行信号停止发送, 则本次上行信号的时长正常; 若脉宽计时器大于信号发送时长、 且本次 上行信号没有停止, 则本次上行信号的时长不正常。
4、 根据权利要求 1所述的方法, 其特征在于, 所述判定本次上行信 号的发送周期不正常之前, 该方法还包括: 根据接收到的两次上行信号 指派信息计算得出上行信号的发送周期。
5、 根据权利要求 4所述的方法, 其特征在于, 所述判定本次上行信 号的发送周期不正常, 包括: 实时检测是否再次发出上行信号, 当检测 到再次发出上行信号时, 记录当前周期计时器的时长; 判断当前周期计 时器的时长与计算得出的上行信号的周期是否相同, 若相同, 则上行信 号的发送周期正常, 否则, 上行信号的发送周期不正常。
6、 根据权利要求 1所述的方法, 其特征在于, 所述判定当前发光指 示信号不正常, 包括: 当停止发送本次上行信号时, 开启延时计时器, 实时检测发光指示信号是否停止、 并实时检测延时计时器是否小于等于 发光指示信号的延时门限; 若延时计时器小于等于发光指示信号的延时 门限、 且发光指示信号停止, 则发光指示信号正常; 若延时计时器大于 发光指示信号的延时门限、 且发光指示信号没有停止, 则发光指示信号 不正常。
7、 根据权利要求 1 所述的方法, 其特征在于, 所述判定上行信号之 间的间隔不正常, 包括: 当发光指示信号停止时开启间隔计时器, 实时 检测是否开始再次发送上行信号、 并实时检测间隔计时器是否小于等于 上行信号之间的间隔门限; 若间隔计时器小于等于上行信号之间的间隔 门限、 且开始再次发送上行信号, 则上行信号之间的间隔正常; 若间隔 计时器大于上行信号之间的间隔门限、 且没有再次发送上行信号, 则上 行信号之间的间隔不正常。
8、 一种检测 ONU的光模块异常发光的装置, 其特征在于, 该装置包 括: 异常发光检测模块和光模块; 其中,
异常发光检测模块, 用于若根据本次上行信号指派信息, 判定本次 上行信号的时长不正常、 或判定本次上行信号的发送周期不正常, 则关 闭所在 ONU的光模块的发送功能; 或者, 若根据预置的间隔参数, 判定 当前发光指示信号不正常、 或判定上行信号之间的间隔不正常, 关闭所 在 ONU的光模块的发送功能;
光模块, 用于接收异常发光检测模块的控制关闭自身的发送功能。
9、 根据权利要求 8所述的装置, 其特征在于, 所述装置还包括: 控 制模块, 用于解析光模块发来的下行信号, 将下行信号中的上行信号的 信号发送时间、 信号发送时长和 DBA 调度周期作为本次上行信号指派 信息发送给异常发光检测模块;
相应的, 所述异常发光检测模块, 具体用于保存预置的间隔参数, 当所在 ONU 开启后, 接收并保存控制模块发来的本次上行信号指派信 息;
所述光模块, 还用于将 OLT发来的下行信号发送给控制模块。
10、 根据权利要求 8所述的装置, 其特征在于,
所述异常发光检测模块, 具体用于实时检测脉宽计时器是否小于等 于信号发送时长, 若脉宽计时器小于等于信号发送时长、 且收到本次上 行信号停止发送的通知, 则本次上行信号的时长正常, 若脉宽计时器大 于信号发送时长、 且没有收到本次上行信号停止发送的通知, 则本次上 行信号的时长不正常。
11、 根据权利要求 8所述的装置, 其特征在于,
所述异常发光检测模块, 还用于根据接收到的两次上行信号指派信 息计算得出上行信号的发送周期。
12、 根据权利要求 1 1所述的装置, 其特征在于,
所述异常发光检测模块, 具体用于实时检测是否收到再次发出上行 信号的通知, 当检测到再次发出上行信号时, 记录当前周期计时器的时 长;判断当前周期计时器的时长与计算得出的上行信号的周期是否相同, 若相同, 则上行信号的发送周期正常, 否则, 上行信号的发送周期不正 常。
13、 根据权利要求 8所述的装置, 其特征在于,
所述异常发光检测模块, 具体用于当收到停止发送本次上行信号的 通知时, 开启延时计时器, 实时检测发光指示信号是否停止、 并实时检 测延时计时器是否小于等于预置的发光指示信号的延时门限; 若延时计 时器小于等于发光指示信号的延时门限、 且发光指示信号停止, 则发光 指示信号正常; 若延时计时器大于发光指示信号的延时门限、 且发光指 示信号没有停止, 则发光指示信号不正常。
14、 根据权利要求 8所述的装置, 其特征在于,
所述异常发光检测模块, 具体用于当发光指示信号停止时开启间隔 计时器, 实时检测是否有开始再次发送上行信号的通知、 并实时检测间 隔计时器是否小于等于预置的上行信号之间的间隔门限; 若间隔计时器 小于等于上行信号之间的间隔门限、 且开始再次发送上行信号, 则上行 信号之间的间隔正常; 若间隔计时器大于上行信号之间的间隔门限、 且 没有再次发送上行信号, 则上行信号之间的间隔不正常。
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