CN115865221B - PON network BOSA device interference shielding method and system - Google Patents
PON network BOSA device interference shielding method and system Download PDFInfo
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Abstract
The invention provides a PON network BOSA device interference shielding device, a method and a system, and relates to the technical field of optical network communication. The device provided by the invention effectively absorbs and discharges electromagnetic waves by improving the shape and the size of the Gaussian curved surface of the BOSA outer shielding cover, effectively solves the problem of effective transmission of optical signals of products, and ensures the transmission quality of the optical signals inside the products. The wireless electromagnetic wave signal is led to GND in the circuit through the Gaussian curved surface shielding cover outside the BOSA device, so that the electromagnetic wave is effectively absorbed and discharged, and the interference of the wireless electromagnetic wave signal is reduced; the method provided by the invention can detect, identify, locate and alarm the optical signal interference in the PON network, and can formulate different shielding strategies according to the type of the optical signal interference and automatically execute the shielding strategies; after the investigation is completed, the uplink/path transmission communication of the shielding area is restored additionally. Compared with the prior art, the method has the characteristics of rapidness, convenience and intelligence.
Description
Technical Field
The present invention relates to the field of optical network communications technologies, and in particular, to a PON BOSA device interference shielding apparatus, method, and system.
Background
With the continuous development of communication technology and the increasing network demands of people, optical copper advance and retreat have become the irreversible major trend of the solid network development. Wherein PON networks have travelled a lengthy path in their relatively short history; from the beginning of the non-eye, it has now become an important component of many large network infrastructures; the system is a key support of the Internet, thoroughly changes our communication mode, and initiates an unprecedented technological progress era. As trends such as 5G mature, PON networks seem to be expected to continue to play an important role in our increasingly digitized world
PON networks are typically comprised of an Optical Line Terminal (OLT) installed at a central control station, and a plurality of Optical Network Units (ONUs) that are installed in-line at the customer premises. The downlink data transmission is a broadcasting mechanism, all Optical Network Units (ONUs) can receive all downlink data frames on the physical PON port, the uplink working mechanism is a Time Division Multiple Access (TDMA) mode, and each ONU only transmits uplink data in an uplink grant time slot allocated to the ONU by an Optical Line Terminal (OLT).
The uplink and the downlink of a data frame between an Optical Line Terminal (OLT) and an Optical Network Unit (ONU) in the PON are carried out through a device optical transmitting and receiving assembly (BOSA device), when the BOSA device is abnormal or shielded and leaked, optical signal interference is generated, and the optical signal interference is transmitted to the whole network through the uplink of the data frame; the light interference of the optical signal affects the stability of the PON network, and the normal operation of the whole network is endangered. Therefore, when optical signal interference occurs, the optical signal interference is prevented from being leaked in the uplink at the first time, so as not to affect the whole network.
A network is interfered by optical signals due to the failure, open leakage or electronic interference of the BOSA device, and therefore, it is necessary to provide a PON network BOSA device interference shielding apparatus, method and system to solve the above technical problems.
Disclosure of Invention
In order to solve one of the above technical problems, the present invention provides a PON BOSA device interference shielding apparatus, including: a Gaussian curved surface shielding cover and a shielding cover base;
The BOSA device is mounted on a PCB board, including: the BOSA comprises a BOSA body, a BOSA adapter and a BOSA tail fiber; the BOSA body is connected with a BOSA adapter, and the BOSA adapter is connected with a BOSA tail fiber; the BOSA adapter and the BOSA tail fiber are arranged in a column shape;
the shield cover base includes: a base frame and a BOSA device mounting groove; the base frame is a closed frame and is arranged on the PCB, and the BOSA body is enclosed inside the closed frame; the BOSA device mounting groove is formed in the upper edge of the base frame, is matched with the outer diameter of the BOSA adapter to be arranged, and is supported in the groove;
The Gaussian curved surface shielding case comprises: a shield shell and a shield opening; a shielding case mounting groove is formed in the bottom edge of the shielding case shell, and the shielding case shell is mounted on the base frame through the shielding case mounting groove; the shield cover opening is offered in BOSA device mounting groove relative position department, includes: BOSA tail fiber inlet slot and BOSA device mounting port; the BOSA tail fiber inlet groove is matched with the outer diameter of the BOSA tail fiber to be arranged, and the BOSA tail fiber can pass through the BOSA tail fiber inlet groove and enter the BOSA device mounting port; the BOSA device mounting port is matched with the outer diameter of the BOSA adapter to be arranged, and the BOSA device mounting port and the BOSA device mounting groove jointly enclose the BOSA adapter inside;
the PCB is provided with a circuit GND port, and the Gaussian curved surface shielding cover is arranged through a conductive material and is electrically connected with the circuit GND port;
When in use: the BOSA device, the Gaussian curved surface shielding cover and the shielding cover base are combined to form a closed Gaussian curved surface; the Gaussian surface is used for reducing open leakage of the BOSA body, absorbing external clutter through the Gaussian surface shielding cover and transmitting the external clutter to the GND port information of the circuit to eliminate.
The BOSA device interference shielding method is used for detecting optical signal interference in the PON, judging whether the optical signal interference comes from the BOSA device or not, and shielding the BOSA device generating the optical signal interference; the method comprises the following specific steps: optical signal interference detection, optical signal interference alarm, optical signal interference identification, optical signal interference positioning, BOSA device shielding strategy generation, BOSA device shielding strategy execution and optical signal interference shielding result feedback; wherein:
the optical signal interference detection: for detecting whether optical signal interference exists in the PON network;
The optical signal interference identification: for identifying an optical signal interference category, the optical signal interference category comprising: simple uplink optical signal interference and bidirectional optical signal interference, the bidirectional optical signal interference comprising: bidirectional optical signal interference and path transmission bidirectional optical signal interference of the BOSA device;
the optical signal interference positioning: the device is used for positioning the occurrence point of the optical signal interference;
the optical signal interference alarm comprises the following steps: executing an optical signal interference alarm strategy after detecting that optical signal interference occurs;
the BOSA device masking policy generation: generating corresponding shielding strategies aiming at different optical signal interference categories;
The BOSA device masking policy performs: the BOSA device shielding strategy is lowered to a corresponding execution unit, and the BOSA device shielding strategy is executed through the execution unit;
and feeding back the optical signal interference shielding result: and detecting the optical signal interference in the PON again, judging whether the optical signal interference problem is improved, and feeding back the result.
As a still further solution, the optical signal disturbance detection comprises the steps of:
broadcasting an interference detection command to the whole network through the Optical Line Terminal (OLT) in the PON network at regular/irregular time; the interference detection command comprises a corresponding authorized time slot table;
An optical network unit ONU in the PON network receives an interference detection command and transmits a beam of standard uplink optical signals to the optical line terminal OLT in a time-sharing manner in a corresponding authorized time slot;
the optical line terminal OLT receives standard uplink optical signals and compares the standard uplink optical signals with an uplink optical signal theoretical value to calculate an uplink optical signal difference value;
comparing the uplink optical signal difference value with an uplink optical signal interference judging threshold value, and if the uplink optical signal difference value exceeds the uplink optical signal interference judging threshold value, considering that the uplink optical signal interference is detected; otherwise, continuing to perform optical signal interference detection on the PON network.
As a still further solution, the optical signal disturbance recognition is performed after detecting an optical signal disturbance; the method comprises the following steps:
recording an Optical Network Unit (ONU) when the optical signal interference is detected, and obtaining an interference Optical Network Unit (ONU) to be identified;
Transmitting a beam of standard downlink optical signals to an interference optical network unit ONU to be identified through an optical line terminal OLT;
receiving a standard downlink optical signal through an interference optical network unit ONU to be identified, comparing the standard downlink optical signal with a theoretical value of the downlink optical signal, and calculating a difference value of the downlink optical signal;
Comparing the downlink optical signal difference value with a downlink optical signal interference judging threshold value, and if the downlink optical signal difference value exceeds the downlink optical signal interference judging threshold value, considering the optical signal interference category as follows: bidirectional optical signal interference, and executing a bidirectional optical signal interference identification step; otherwise, the optical signal interference category is considered as follows: the optical signal interference recognition result is output by the simple uplink optical signal interference;
And a bidirectional optical signal interference identification step:
collecting standard uplink optical signals sent to an Optical Line Terminal (OLT) by an Optical Network Unit (ONU) to be identified, and obtaining a first comparison signal;
acquiring a standard downlink optical signal sent by an Optical Line Terminal (OLT) to an interference Optical Network Unit (ONU) to be identified, and obtaining a second comparison signal;
extracting interference waves of the sum of the first comparison signal and the second comparison signal to obtain first interference waves and second interference waves;
waveform comparison is carried out on the first interference wave and the second interference wave:
If the waveforms of the first interference wave and the second interference wave approach, the optical signal interference category is primarily considered as follows: path transmission bi-directional optical signal interference;
if the waveforms of the first interference wave and the second interference wave are different, preliminarily considering the optical signal interference category as follows: the BOSA device is two-way optical signal disturbance.
As a still further solution, the optical signal disturbance localization is performed after optical signal disturbance identification; the method comprises the following steps:
Acquiring an optical signal interference category;
optical signal interference positioning is carried out according to the optical signal interference category:
if the optical signal interference category is: the optical signal interference is positioned at the corresponding optical network unit ONU;
If the optical signal interference category is: bidirectional optical signal interference, the optical signal interference is located at the corresponding optical network unit ONU and/or on the path transmission line.
As a further solution, the optical signal interference alarm is executed after the optical signal interference positioning and provides interference positioning information for operation and maintenance personnel;
If the optical signal interference category is: the interference positioning information is the position information of the corresponding optical network unit ONU if the uplink optical signal is simply interfered;
if the optical signal interference category is: the bidirectional optical signal is interfered, and the interference positioning information is the position information of the corresponding optical network unit ONU and the path information of the path transmission line;
operation and maintenance personnel: if the uplink optical signal interference is only carried out, the system directly goes to the corresponding optical network unit ONU for investigation; if the path transmission bidirectional optical signal interference is primarily considered, checking the path transmission line corresponding to the path transmission line in advance; if the bidirectional optical signal interference of the BOSA device is primarily considered, the corresponding optical network unit ONU is preferably checked.
As a further solution, the BOSA device shielding strategy generation is performed after the optical signal interference identification, and corresponding shielding strategies are generated for different optical signal interference categories:
shielding strategy of simple uplink optical signal interference: shielding an uplink optical signal corresponding to an Optical Network Unit (ONU), and reserving a downlink optical signal;
shielding strategy of bidirectional optical signal interference: the uplink optical signal and the downlink optical signal of the corresponding path transmission line are directly shielded.
As a still further solution, the BOSA device shielding policy enforcement is performed after the BOSA device shielding policy is generated;
If a shielding strategy of simple uplink optical signal interference is executed: the optical line terminal OLT sends a signaling to the corresponding optical network unit ONU, and the work of the sending end of the BOSA device is required to be stopped, but the work of the receiving end of the BOSA device is reserved;
If a shielding strategy of bidirectional optical signal interference is implemented: the optical line termination OLT temporarily cuts off the corresponding path transmission line.
As a further solution, the optical signal interference shielding result feedback is performed after the BOSA device shielding strategy is executed; if the optical line terminal OLT does not detect the uplink optical signal from the corresponding optical network unit ONU after executing the BOSA device shielding strategy, the shielding is successful and the result is fed back; otherwise, the shielding fails and the result is fed back.
A PON network BOSA device interference shielding system, wherein an optical signal interference physical shielding is performed on a BOSA device in a PON network by using a PON network BOSA device interference shielding apparatus as described above; or performing optical signal interference algorithm shielding on the BOSA device in the PON network by using the PON network BOSA device interference shielding method.
Compared with the related art, the PON network BOSA device interference shielding device, method and system provided by the invention have the following beneficial effects:
1. According to the PON network BOSA device interference shielding device, the shape and the size of the Gaussian curved surface of the BOSA outer shielding cover are improved, electromagnetic waves are effectively absorbed and discharged, effective transmission of optical signals of products is effectively achieved, and the transmission quality of the optical signals inside the products is guaranteed. The wireless electromagnetic wave signal is led to GND in the circuit through the Gaussian curved surface shielding cover outside the BOSA device, so that the electromagnetic wave is effectively absorbed and discharged, and the interference of the wireless electromagnetic wave signal is reduced;
2. The PON network BOSA device interference shielding method provided by the invention can detect, identify, locate and alarm the optical signal interference in the PON network, and can formulate different shielding strategies according to the type of the optical signal interference and automatically execute the different shielding strategies; the method is used as a shielding means after the occurrence of the optical signal interference, can detect the optical signal interference in the uplink PON network at the first time and position the optical signal interference, and when informing an operation and maintenance person to go to a corresponding area, different shielding strategies are formulated according to the type of the optical signal interference and are automatically executed, so that the optical signal interference in the PON network can be eliminated immediately without waiting for the operation and maintenance person to check; after the investigation is completed, the uplink/path transmission communication of the shielding area is restored additionally. Compared with the prior art, the method has the characteristics of rapidness, convenience and intelligence.
Drawings
Fig. 1 is a schematic diagram of a preferred structure of a BOSA device interference shielding apparatus for PON according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a preferred installation of a BOSA device interference shielding apparatus of a PON network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a preferred opening of a PON BOSA device interference shielding apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a BOSA device according to the embodiment of the present invention;
Fig. 5 is a schematic flow chart of a PON BOSA device interference shielding method according to an embodiment of the present invention;
Fig. 6 is a flowchart of a preferred identification method for a BOSA device interference shielding method in a PON network according to an embodiment of the present invention.
Wherein, the reference numeral number: 1. a gaussian curved surface shielding cover; 11. a shield opening; 2. a shield base; 3. a PCB board; 41. a BOSA body; 42. a BOSA adapter; 43. BOSA pigtail.
Detailed Description
The invention will be further described with reference to the drawings and embodiments.
Starting from two aspects, the physical shielding effect of the BOSA device is guaranteed through the hardware device, and the possibility of occurrence of optical signal interference is reduced as much as possible; in addition, a shielding program method is combined, and after uplink optical signal interference is detected, a corresponding shielding strategy is formulated, so that the communication stability and the safety of the whole network are ensured at the first time.
As shown in fig. 1 to 4, the interference shielding device for a BOSA device of a PON network provided in this embodiment includes: a Gaussian curved surface shielding case 1 and a shielding case base 2;
the BOSA device is mounted on the PCB board 3, and includes: a BOSA body 41, a BOSA adapter 42 and a BOSA pigtail 43; the BOSA body 41 is connected with a BOSA adapter 42, and the BOSA adapter 42 is connected with a BOSA pigtail 43; the BOSA adapter 42 and the BOSA pigtail 43 are both arranged in a column shape;
The shield base 2 includes: a base frame and a BOSA device mounting groove; the base frame is a closed frame, is arranged on the PCB 3 and surrounds the BOSA body 41 inside the closed frame; the BOSA device mounting groove is formed in the upper edge of the base frame, is matched with the outer diameter of the BOSA adapter 42 for setting, and supports the BOSA adapter 42 in the groove;
The gaussian curved surface shield 1 includes: a shield case and a shield opening 11; a shielding case mounting groove is formed in the bottom edge of the shielding case shell, and the shielding case shell is mounted on the base frame through the shielding case mounting groove; the shield cover opening 11 is opened at the relative position of the BOSA device mounting groove, and comprises: BOSA tail fiber inlet slot and BOSA device mounting port; the BOSA tail fiber inlet groove is matched with the outer diameter of the BOSA tail fiber 43 for setting, and the BOSA tail fiber 43 can pass through the BOSA tail fiber inlet groove and enter the BOSA device mounting port; the BOSA device mounting port is configured to fit the outer diameter of the BOSA adapter 42 and to enclose the BOSA adapter 42 inside in conjunction with the BOSA device mounting groove;
the PCB 3 is provided with a circuit GND port, and the Gaussian curved surface shielding cover 1 is arranged through a conductive material and is electrically connected with the circuit GND port;
When in use: the BOSA device, the Gaussian curved surface shielding case 1 and the shielding case base 2 are combined to form a closed Gaussian curved surface; the gaussian surface is used for reducing the open leakage of the BOSA body 41, and the gaussian surface shielding cover 1 absorbs external clutter and transmits the external clutter to the circuit GND port information for elimination.
It should be noted that: along with the progress of technology, the demands of people on the network are higher, the performance of the optical fiber network is continuously improved, the capacity of optical fiber communication is further optimized and perfected, a plurality of optical signals with different wavelengths are transmitted on the same optical fiber, the service efficiency of the optical fiber is increased, and the optical fiber can be interfered by external wireless electromagnetic waves in the same time space to transmit optical wave signals under the condition that multi-wavelength, multi-channel and wireless signals work simultaneously. According to the embodiment, the shape and the size of the Gaussian curved surface of the BOSA outer shielding cover are improved, electromagnetic waves are effectively absorbed and discharged, effective transmission of optical signals of a product is effectively achieved, and the transmission quality problem of the optical signals inside the product is guaranteed. The wireless electromagnetic wave signals are led to GND in the circuit through the Gaussian curved surface shielding cover outside the BOSA device, electromagnetic waves are effectively absorbed and discharged, and therefore interference of the wireless electromagnetic wave signals is reduced.
As shown in fig. 5 and fig. 6, the method for shielding BOSA devices of PON network according to the present embodiment is configured to detect optical signal interference in a PON network, determine whether the optical signal interference is from a BOSA device, and shield the BOSA device that generates the optical signal interference; the method comprises the following specific steps: optical signal interference detection, optical signal interference alarm, optical signal interference identification, optical signal interference positioning, BOSA device shielding strategy generation, BOSA device shielding strategy execution and optical signal interference shielding result feedback; wherein:
the optical signal interference detection: for detecting whether optical signal interference exists in the PON network;
The optical signal interference identification: for identifying an optical signal interference category, the optical signal interference category comprising: simple uplink optical signal interference and bidirectional optical signal interference, the bidirectional optical signal interference comprising: bidirectional optical signal interference and path transmission bidirectional optical signal interference of the BOSA device;
the optical signal interference positioning: the device is used for positioning the occurrence point of the optical signal interference;
the optical signal interference alarm comprises the following steps: executing an optical signal interference alarm strategy after detecting that optical signal interference occurs;
the BOSA device masking policy generation: generating corresponding shielding strategies aiming at different optical signal interference categories;
The BOSA device masking policy performs: the BOSA device shielding strategy is lowered to a corresponding execution unit, and the BOSA device shielding strategy is executed through the execution unit;
and feeding back the optical signal interference shielding result: detecting the optical signal interference in the PON again, judging whether the optical signal interference problem is improved, and feeding back the result.
It should be noted that: the traditional optical signal interference shielding method is to detect the PON network in real time, and send operation and maintenance personnel to the corresponding areas one by one to check when detecting that the optical signal interference exists in the PON network, and only after the check is finished, the optical signal interference in the PON network can be completely eliminated; the PON network BOSA device interference shielding method provided by the embodiment can detect, identify, locate and alarm the optical signal interference in the PON network, and can formulate different shielding strategies according to the type of the optical signal interference and automatically execute the different shielding strategies; the method is used as a shielding means after the occurrence of the optical signal interference, can detect the optical signal interference in the uplink PON network at the first time and position the optical signal interference, and when informing an operation and maintenance person to go to a corresponding area, different shielding strategies are formulated according to the type of the optical signal interference and are automatically executed, so that the optical signal interference in the PON network can be eliminated immediately without waiting for the operation and maintenance person to check; after the investigation is completed, the uplink/path transmission communication of the shielding area is restored additionally. Compared with the prior art, the method has the characteristics of rapidness, convenience and intelligence.
As a still further solution, the optical signal disturbance detection comprises the steps of:
broadcasting an interference detection command to the whole network through the Optical Line Terminal (OLT) in the PON network at regular/irregular time; the interference detection command comprises a corresponding authorized time slot table;
An optical network unit ONU in the PON network receives an interference detection command and transmits a beam of standard uplink optical signals to the optical line terminal OLT in a time-sharing manner in a corresponding authorized time slot;
the optical line terminal OLT receives standard uplink optical signals and compares the standard uplink optical signals with an uplink optical signal theoretical value to calculate an uplink optical signal difference value;
comparing the uplink optical signal difference value with an uplink optical signal interference judging threshold value, and if the uplink optical signal difference value exceeds the uplink optical signal interference judging threshold value, considering that the uplink optical signal interference is detected; otherwise, continuing to perform optical signal interference detection on the PON network.
It should be noted that: the optical line terminal OLT is maintained by special persons for a long time and has a self-checking function, and the conditions of BOSA device faults and the like are not existed in general, so that the optical signal interference in the PON network is usually from optical network units ONU with huge quantity, wide distribution and no special person maintenance; therefore, the object of the optical signal interference detection is the optical network unit ONU, and the object of the detection is whether there is optical signal interference in the uplink optical signal. The stability of the whole PON network can be affected by the existence of optical signal interference in the uplink optical signal, but the influence of the existence of the downlink optical signal of the optical network unit ONU can only affect individual equipment, so that the problem is not very urgent; therefore, in order to optimize the detection flow and increase the detection speed, we choose to calculate the difference value of the uplink optical signal to evaluate whether the PON network has optical signal interference.
As a still further solution, the optical signal disturbance recognition is performed after the optical signal disturbance is detected as illustrated in the figure; the method comprises the following steps:
recording an Optical Network Unit (ONU) when the optical signal interference is detected, and obtaining an interference Optical Network Unit (ONU) to be identified;
Transmitting a beam of standard downlink optical signals to an interference optical network unit ONU to be identified through an optical line terminal OLT;
receiving a standard downlink optical signal through an interference optical network unit ONU to be identified, comparing the standard downlink optical signal with a theoretical value of the downlink optical signal, and calculating a difference value of the downlink optical signal;
Comparing the downlink optical signal difference value with a downlink optical signal interference judging threshold value, and if the downlink optical signal difference value exceeds the downlink optical signal interference judging threshold value, considering the optical signal interference category as follows: bidirectional optical signal interference, and executing a bidirectional optical signal interference identification step; otherwise, the optical signal interference category is considered as follows: the optical signal interference recognition result is output by the simple uplink optical signal interference;
And a bidirectional optical signal interference identification step:
collecting standard uplink optical signals sent to an Optical Line Terminal (OLT) by an Optical Network Unit (ONU) to be identified, and obtaining a first comparison signal;
acquiring a standard downlink optical signal sent by an Optical Line Terminal (OLT) to an interference Optical Network Unit (ONU) to be identified, and obtaining a second comparison signal;
extracting interference waves of the sum of the first comparison signal and the second comparison signal to obtain first interference waves and second interference waves;
waveform comparison is carried out on the first interference wave and the second interference wave:
If the waveforms of the first interference wave and the second interference wave approach, the optical signal interference category is primarily considered as follows: path transmission bi-directional optical signal interference;
if the waveforms of the first interference wave and the second interference wave are different, preliminarily considering the optical signal interference category as follows: the BOSA device is two-way optical signal disturbance.
It should be noted that: optical signal interference identification is the key to generating a corresponding shielding strategy, and by optical signal interference detection we know that optical signal interference exists in a PON network, as to which type of interference, we need to identify so as to give a targeted strategy later
The optical signal interference types include: pure uplink optical signal interference, path transmission bidirectional optical signal interference and BOSA device bidirectional optical signal interference; wherein, simple uplink optical signal interference: namely, the BOSA device can normally receive the downlink optical signals, but the uplink optical signals uploaded have optical signal interference; path transmission bi-directional optical signal interference: the optical signal interference is introduced because of bending, leakage and other conditions existing at a certain position in the path transmission process; BOSA device bi-directional optical signal interference: that is, there is optical signal interference in both uplink optical signals and downlink optical signals of the current BOSA device, which is likely to be the overall failure of the BOSA device.
The simple uplink optical signal interference is easy to identify, namely: the BOSA device can normally receive the downlink optical signals, which means that the path transmission process is normal, and the BOSA device can also normally receive the downlink optical signals;
The BOSA device bidirectional optical signal interference and the path transmission bidirectional optical signal interference have identification uncertainty, so that the BOSA device bidirectional optical signal interference and the path transmission bidirectional optical signal interference can be identified only initially; by approaching/separating the waveforms of the first interference wave and the second interference wave, we can roughly identify whether the bidirectional optical signal interference of the BOSA device or the bidirectional optical signal interference of the path transmission occurs; because the bidirectional optical signal interference of the path transmission is usually that compatible optical signal interference is introduced into both uplink and downlink, the waveforms of the obtained first interference wave and the second interference wave approach; the BOSA device bidirectional optical signal interference is that two ends are failed, and different links adopted by the two ends are in different forms on waveforms with high probability; but the method can only be used as a preliminary identification, in individual cases: intermittent power down of BOSA devices, for example, can also cause both upstream and downstream to introduce compatible optical signal interference.
As a still further solution, the optical signal disturbance localization is performed after optical signal disturbance identification; the method comprises the following steps:
Acquiring an optical signal interference category;
optical signal interference positioning is carried out according to the optical signal interference category:
if the optical signal interference category is: the optical signal interference is positioned at the corresponding optical network unit ONU;
If the optical signal interference category is: bidirectional optical signal interference, the optical signal interference is located at the corresponding optical network unit ONU and/or on the path transmission line.
As a further solution, the optical signal interference alarm is executed after the optical signal interference positioning and provides interference positioning information for operation and maintenance personnel;
If the optical signal interference category is: the interference positioning information is the position information of the corresponding optical network unit ONU if the uplink optical signal is simply interfered;
if the optical signal interference category is: the bidirectional optical signal is interfered, and the interference positioning information is the position information of the corresponding optical network unit ONU and the path information of the path transmission line;
operation and maintenance personnel: if the uplink optical signal interference is only carried out, the system directly goes to the corresponding optical network unit ONU for investigation; if the path transmission bidirectional optical signal interference is primarily considered, checking the path transmission line corresponding to the path transmission line in advance; if the bidirectional optical signal interference of the BOSA device is primarily considered, the corresponding optical network unit ONU is preferably checked.
It should be noted that: the interference position of the simple uplink optical signal interference is clear, and an operation and maintenance person can directly go to the position corresponding to the optical network unit ONU; the bidirectional optical signal interference of the path transmission and the bidirectional optical signal interference of the BOSA device are uncertain, but the type of the bidirectional optical signal interference can be primarily determined through waveform comparison, and an operation and maintenance person can go to the primarily determined area currently and go to other areas when the optical signal interference is not checked yet.
As a further solution, the BOSA device shielding strategy generation is performed after the optical signal interference identification, and corresponding shielding strategies are generated for different optical signal interference categories:
shielding strategy of simple uplink optical signal interference: shielding an uplink optical signal corresponding to an Optical Network Unit (ONU), and reserving a downlink optical signal;
shielding strategy of bidirectional optical signal interference: the uplink optical signal and the downlink optical signal of the corresponding path transmission line are directly shielded.
It should be noted that: the simple uplink optical signal interference does not affect the normal receiving optical signal of the BOSA device, so that the downlink optical signal can be reserved, and the function use requirements of users, such as keeping the video stream to continue downlink transmission, are guaranteed to the greatest extent. The bidirectional optical signal interference needs to disconnect the path transmission line from the PON network, and the user is transferred to other links; so as to exclude optical signal interference.
As a still further solution, the BOSA device shielding policy enforcement is performed after the BOSA device shielding policy is generated;
If a shielding strategy of simple uplink optical signal interference is executed: the optical line terminal OLT sends a signaling to the corresponding optical network unit ONU, and the work of the sending end of the BOSA device is required to be stopped, but the work of the receiving end of the BOSA device is reserved;
If a shielding strategy of bidirectional optical signal interference is implemented: the optical line termination OLT temporarily cuts off the corresponding path transmission line.
As a further solution, the optical signal interference shielding result feedback is performed after the BOSA device shielding strategy is executed; if the optical line terminal OLT does not detect the uplink optical signal from the corresponding optical network unit ONU after executing the BOSA device shielding strategy, the shielding is successful and the result is fed back; otherwise, the shielding fails and the result is fed back.
A PON network BOSA device interference shielding system, wherein an optical signal interference physical shielding is performed on a BOSA device in a PON network by using a PON network BOSA device interference shielding apparatus as described above; or performing optical signal interference algorithm shielding on the BOSA device in the PON network by using the PON network BOSA device interference shielding method.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the invention.
Claims (7)
1. The PON network BOSA device interference shielding method is characterized by detecting optical signal interference in a PON network, judging whether the optical signal interference comes from the BOSA device or not, and shielding the BOSA device generating the optical signal interference; the method comprises the following specific steps: optical signal interference detection, optical signal interference alarm, optical signal interference identification, optical signal interference positioning, BOSA device shielding strategy generation, BOSA device shielding strategy execution and optical signal interference shielding result feedback; wherein:
the optical signal interference detection: for detecting whether optical signal interference exists in the PON network;
The optical signal interference identification: for identifying an optical signal interference category, the optical signal interference category comprising: simple uplink optical signal interference and bidirectional optical signal interference, the bidirectional optical signal interference comprising: bidirectional optical signal interference and path transmission bidirectional optical signal interference of the BOSA device;
the optical signal interference positioning: the device is used for positioning the occurrence point of the optical signal interference;
the optical signal interference alarm comprises the following steps: executing an optical signal interference alarm strategy after detecting that optical signal interference occurs;
the BOSA device masking policy generation: generating corresponding shielding strategies aiming at different optical signal interference categories;
The BOSA device masking policy performs: the BOSA device shielding strategy is lowered to a corresponding execution unit, and the BOSA device shielding strategy is executed through the execution unit;
And feeding back the optical signal interference shielding result: detecting the optical signal interference in the PON again, judging whether the optical signal interference problem is improved or not, and feeding back the result;
The optical signal interference detection comprises the following steps:
broadcasting an interference detection command to the whole network through the Optical Line Terminal (OLT) in the PON network at regular/irregular time; the interference detection command comprises a corresponding authorized time slot table;
An optical network unit ONU in the PON network receives an interference detection command and transmits a beam of standard uplink optical signals to the optical line terminal OLT in a time-sharing manner in a corresponding authorized time slot;
the optical line terminal OLT receives standard uplink optical signals and compares the standard uplink optical signals with an uplink optical signal theoretical value to calculate an uplink optical signal difference value;
Comparing the uplink optical signal difference value with an uplink optical signal interference judging threshold value, and if the uplink optical signal difference value exceeds the uplink optical signal interference judging threshold value, considering that the uplink optical signal interference is detected; otherwise, continuing to perform optical signal interference detection on the PON network;
The optical signal interference identification is performed after the optical signal interference is detected; the method comprises the following steps:
recording an Optical Network Unit (ONU) when the optical signal interference is detected, and obtaining an interference Optical Network Unit (ONU) to be identified;
Transmitting a beam of standard downlink optical signals to an interference optical network unit ONU to be identified through an optical line terminal OLT;
receiving a standard downlink optical signal through an interference optical network unit ONU to be identified, comparing the standard downlink optical signal with a theoretical value of the downlink optical signal, and calculating a difference value of the downlink optical signal;
Comparing the downlink optical signal difference value with a downlink optical signal interference judging threshold value, and if the downlink optical signal difference value exceeds the downlink optical signal interference judging threshold value, considering the optical signal interference category as follows: bidirectional optical signal interference, and executing a bidirectional optical signal interference identification step; otherwise, the optical signal interference category is considered as follows: the optical signal interference recognition result is output by the simple uplink optical signal interference; and a bidirectional optical signal interference identification step:
collecting standard uplink optical signals sent to an Optical Line Terminal (OLT) by an Optical Network Unit (ONU) to be identified, and obtaining a first comparison signal;
acquiring a standard downlink optical signal sent by an Optical Line Terminal (OLT) to an interference Optical Network Unit (ONU) to be identified, and obtaining a second comparison signal;
extracting interference waves of the sum of the first comparison signal and the second comparison signal to obtain first interference waves and second interference waves;
waveform comparison is carried out on the first interference wave and the second interference wave:
If the waveforms of the first interference wave and the second interference wave approach, the optical signal interference category is primarily considered as follows: path transmission bi-directional optical signal interference;
if the waveforms of the first interference wave and the second interference wave are different, preliminarily considering the optical signal interference category as follows: the BOSA device is two-way optical signal disturbance.
2. The PON network BOSA device interference shielding method according to claim 1, wherein the optical signal interference positioning is performed after optical signal interference recognition; the method comprises the following steps:
Acquiring an optical signal interference category;
optical signal interference positioning is carried out according to the optical signal interference category:
if the optical signal interference category is: the optical signal interference is positioned at the corresponding optical network unit ONU;
If the optical signal interference category is: bidirectional optical signal interference, the optical signal interference is located at the corresponding optical network unit ONU and/or on the path transmission line.
3. The PON network BOSA device interference shielding method according to claim 2, wherein the optical signal interference alarm is performed after optical signal interference positioning and provides interference positioning information to an operator;
If the optical signal interference category is: the interference positioning information is the position information of the corresponding optical network unit ONU if the uplink optical signal is simply interfered;
if the optical signal interference category is: the bidirectional optical signal is interfered, and the interference positioning information is the position information of the corresponding optical network unit ONU and the path information of the path transmission line;
operation and maintenance personnel: if the uplink optical signal interference is only carried out, the system directly goes to the corresponding optical network unit ONU for investigation; if the path transmission bidirectional optical signal interference is primarily considered, checking the path transmission line corresponding to the path transmission line in advance; if the bidirectional optical signal interference of the BOSA device is primarily considered, the corresponding optical network unit ONU is preferably checked.
4. A PON network BOSA device interference shielding method according to claim 3, wherein the following steps are performed
The BOSA device shielding strategy generation is executed after the optical signal interference is identified, and corresponding shielding strategies are generated aiming at different optical signal interference categories:
shielding strategy of simple uplink optical signal interference: shielding an uplink optical signal corresponding to an Optical Network Unit (ONU), and reserving a downlink optical signal;
shielding strategy of bidirectional optical signal interference: the uplink optical signal and the downlink optical signal of the corresponding path transmission line are directly shielded.
5. The PON network BOSA device interference shielding method of claim 4, wherein the BOSA device shielding policy enforcement is performed after the BOSA device shielding policy is generated;
If a shielding strategy of simple uplink optical signal interference is executed: the optical line terminal OLT sends a signaling to the corresponding optical network unit ONU, and the work of the sending end of the BOSA device is required to be stopped, but the work of the receiving end of the BOSA device is reserved;
If a shielding strategy of bidirectional optical signal interference is implemented: the optical line termination OLT temporarily cuts off the corresponding path transmission line.
6. The PON network BOSA device interference shielding method of claim 5, wherein the optical signal interference shielding result feedback is performed after a BOSA device shielding policy is executed; if the optical line terminal OLT does not detect the uplink optical signal from the corresponding optical network unit ONU after executing the BOSA device shielding strategy, the shielding is successful and the result is fed back; otherwise, the shielding fails and the result is fed back.
7. A PON network BOSA device interference shielding system, wherein the BOSA devices in the PON network are shielded from optical signal interference by a PON network BOSA device interference shielding method according to any one of claims 1-6.
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