WO2013159350A1

WO2013159350A1 - Method, system, and device for positioning abnormal onu in passive optical network system

Info

Publication number: WO2013159350A1
Application number: PCT/CN2012/074862
Authority: WO
Inventors: 张伟良; 耿丹
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2013-10-31

Abstract

Disclosed is a method for positioning an abnormal ONU in a passive optical network system, comprising: based on different optical power values of ONUs, randomly combining the ONUs in the system to form different ONU groups, and storing an optical power interval value of each ONU group; when an abnormal ONU is present, obtaining an optical power value of an ONU currently transmitting data, matching the obtained optical power value with the stored optical power interval values to determine an ONU group where the corresponding abnormal ONU is located, and positioning the abnormal ONU in the ONU group. Correspondingly, also disclosed are a system and device for positioning an abnormal ONU in a passive optical network system. An ONU group comprises a limited number of ONUs, so the positioning range of the abnormal ONU is reduced, the impact on other normally working ONUs is reduced, and the quality of the network service is improved.

Description

Locating method, system and device for abnormal ONU in passive optical network system

The present invention relates to the field of communications technologies, and in particular, to a method, system and device for locating an abnormal optical network unit (ONU) in a passive optical network (PON) system. Background technique

With the development of network technology, a large amount of voice, data, video and other services are transmitted through the network, so the bandwidth requirements are continuously improved, and a PON system is generated to meet such demands.

FIG. 1 is a schematic diagram of a topology structure of a PON system. The PON system uses a point-to-multipoint network and an optical distribution node (ODN) and an optical network unit (ONU) on the user side, where the ODN is an OLT and The physical connection between the ONUs provides an optical transmission medium.

In the new Gigabit-Capable PON (GPON) system, the data transmission direction from the OLT to the ONU is the downlink direction, and the data transmission direction from the ONU to the OLT is the uplink direction. The downlink data transmission adopts the broadcast mode, and each ONU receives all the data frames respectively, according to the ONU identifier (ONU-ID) carried in the data frame, and the GPON Encapsulation Method (GEM) - the port label i (Port ID) Assign the Allocation-ID information to determine which data frames are received and sent to the OLT. When performing uplink data transmission, the ONU needs to share the transmission medium, and each ONU performs uplink data transmission according to the time slot allocated by the OLT.

2 is a schematic structural diagram of a downlink data frame of a G-PON Transmission Convergence (GTC) layer in a GPON system, including PCBd and a payload in the data frame, where PCBd Including: Physical Synchronization (Psync) domain, ID (Ident) domain, Physical Layer Operation, Administraion & Maintenance downstream (PLOAMd) Bit Interleaved Parity , BIP ) or , Payload Length downstream ( Plend ) or the upstream bandwidth map ( US BWmap ) field.

The OLT can use the PLOAMd field in the data frame to implement management functions such as activation of the ONU, establishment of an ONU management control channel, encryption configuration, and key management. The US BWmap domain includes N allocation structures (Allocation Structure), and each of the allocation structures includes: an Allocation Identifier (Alloc-ID) domain, a Flags domain, a bandwidth start time (StartTime) domain, and a bandwidth end time ( StopTime) domain and Cyclic Redundancy Check (CRC) field, where Alloc-ID can be identified by Transmission Container (T-CONT), and Flags field is an option for bandwidth allocation, occupying 0~11 The 12-bit bit, where bit 10 is used to notify the ONU to send a PLOAM message on the upstream bandwidth, and bits 0-6 are reserved bits.

When the ONU receives an allocation structure, the ONU determines that the allocation structure is sent to the OLT according to the Alloc-ID information in the allocation structure, and the ONU performs CRC check on the received data of the allocation structure. When the verification passes, the ONU sends the data in the T-CONT in the allocation structure according to the bandwidth start time carried in the allocation structure, and ends the transmission of the data at the bandwidth end time.

When an ONU in the PON system turns on the activator to emit light or sends uplink data in the uplink bandwidth corresponding to the allocation structure allocated by the OLT to other ONUs, then two ONUs simultaneously emit or transmit data on the uplink channel, resulting in the OLT failing. The received uplink data is normally parsed, so the OLT needs to locate the ONU that has an abnormality.

In the prior art, the method for locating an abnormal ONU by the OLT includes: The OLT sends a disable sequence number to each ONU in the PON system to which it has a connection relationship (Disable_Serial_) The message is sent or deactivated (Deactivate_ONU-ID). The ONU that receives the above information turns off its own laser. When the ONU turns off its own laser and the OLT can correctly parse the received uplink data, it can implement the abnormal ONU. Or the OLT may send a control command to stop the uplink data transmission to all ONUs, and then perform an uplink data transmission instruction to the ONU one by one to realize positioning of the abnormal ONU.

It can be seen that, in the prior art, when the OLT locates an abnormal ONU, it needs to send information to each ONU one by one, or send an instruction to stop sending data to each ONU, and stop when the normal ONU receives the corresponding information. The transmission of data will affect the operation of normal ONUs and reduce the quality of service of the network. Summary of the invention

In view of the above, the embodiments of the present invention provide a method, a system, and a device for locating an abnormal ONU in a passive optical network system, which are used to solve the problem that the existing abnormal ONU positioning affects the normal ONU and reduces the network service quality.

The embodiment of the invention provides a method for locating an abnormal ONU in a passive optical network system, and the method includes:

When an abnormal ONU occurs in the passive optical network system, the optical line terminal acquires the optical power value of the ONU currently transmitting data;

Matching the optical power value with the optical power interval value saved by the optical line terminal itself; and information corresponding to the information of each ONU in the ONU group according to the optical power interval value saved by the optical line terminal;

According to the information of each ONU in the ONU group, the abnormal ONU is located.

The correspondence between the optical power interval value of the optical line terminal and the information of each ONU in the ONU group is:

For each ONU group, measure the optical power value when each ONU in the group sends uplink data. Each of the ONU groups includes information of at least one ONU;

And determining, according to the measured optical power value and the adjustment interval, an optical power interval value corresponding to the optical power value, and storing a correspondence between the optical power interval value and information of each ONU in the group of ONUs.

When the m ONUs simultaneously send the uplink data, the optical line terminal measures the received optical power value, determines the m ONUs as an ONU group, and uses the measured optical power value as the uplink data of the group of ONUs. The optical power value, where m is an integer not less than 1, determining an optical power interval value corresponding to the optical power value according to the measured optical power value and the adjustment interval, and saving the optical power interval value and each of the group of ONUs The correspondence between the information of the ONU.

Before the m ONUs simultaneously send uplink data, the method further includes:

The optical line terminal notifies the m ONUs to simultaneously send uplink data on the same uplink bandwidth by using downlink information, where the downlink information includes an ONU management control interface message, or a bandwidth mapping domain of a downlink data frame, or a physical layer. Operation, management, and maintenance messages.

When each ONU sends uplink data, the optical line terminal measures the optical power value of each ONU, and records information of each ONU;

Selecting m ONUs as an ONU group, determining the optical power value when the ONUs send uplink data according to the measured optical power value of each ONU in the group, and determining the optical power according to the determined optical power value and the adjustment interval. The optical power interval value corresponding to the value, and the correspondence between the optical power interval value and the information of each ONU in the group of ONUs is saved, where m is an integer not less than 1.

According to the information of each ONU in the ONU group, the ONU that locates the abnormality is: Sending the disabled serial number information to each ONU in the ONU group one by one, or deactivating the information. Locate the abnormal ONU; or,

A control command for stopping uplink data transmission is sent to all ONUs in the ONU group, and an instruction for uplink data transmission is sent to each ONU in the ONU group one by one to locate an abnormal ONU.

The embodiment of the present invention further provides a positioning device for an abnormal ONU in a passive optical network system, where the device includes: an obtaining module, a matching determining module, and a positioning module;

The obtaining module is configured to obtain an optical power value of an ONU that is currently performing data transmission; the matching determining module is configured to match the optical power value with the saved optical power interval value; according to the saved optical power interval value and The information of each ONU in the ONU group determines the information of each ONU in the ONU group corresponding to the optical power interval value that matches the optical power value;

The positioning module is configured to locate an abnormal ONU according to information of each ONU in the ONU group.

The matching determining module is specifically configured to: for each ONU group, measure an optical power value when each ONU in the group sends uplink data, where each ONU group includes information of any at least one ONU; according to the measured light The power value, and the saved adjustment interval, determine an optical power interval value corresponding to the optical power value, and store a correspondence between the optical power interval value and information of each ONU in the group of ONUs.

The matching determining module is specifically configured to: when the m ONUs simultaneously send uplink data, measure the received optical power value, determine the m ONUs as an ONU group, and use the measured optical power value as the group of ONUs. The optical power value when transmitting the uplink data, where m is an integer not less than 1.

The matching determining module is specifically configured to notify the m ONUs to simultaneously send uplink data on the same uplink bandwidth by using downlink information, where the downlink information includes an ONU management control interface message, or a bandwidth mapping of a downlink data frame. Domain, physical layer operation, management and maintenance Message.

The matching determining module is specifically configured to: when each ONU sends uplink data, measure an optical power value of each ONU, and record information of each ONU; select m ONUs as an ONU group, according to the measured group The optical power value of each ONU determines the optical power value when the group of ONUs sends uplink data, determines the optical power interval value corresponding to the optical power value according to the determined optical power value and the adjustment interval, and saves the optical power interval value. Correspondence with information of each ONU in the group of ONUs, where m is an integer not less than one.

The positioning module is specifically configured to send the disabled serial number information to each ONU in the ONU group one by one, or deactivate the information to locate the abnormal ONU; or, specifically, send to all ONUs in the ONU group to stop uplinking. The control command for data transmission, and then sends an instruction for uplink data transmission to each ONU in the ONU group one by one, and locates the abnormal ONU.

The embodiment of the present invention further provides a positioning system for an abnormal ONU in a passive optical network system, where the system includes an optical line terminal and an ONU, where

The optical line terminal includes the positioning device of the abnormal ONU in the passive optical network system described above,

ONU, used for data transmission.

In the embodiment of the present invention, the ONUs in the system are combined to form different ONU groups, and the optical power interval values of the ONU groups are saved. When there is an abnormal ONU allocation, the corresponding ONU group is determined. The abnormal ONU is located in the ONU group. Because the ONU group contains a limited number of ONUs, the location of the abnormal ONU is reduced, which reduces the impact of abnormal ONU positioning on other normal working ONUs and improves network service quality. DRAWINGS

Figure 1 is a schematic diagram of the topology of a PON system;

2 is a schematic structural diagram of a downlink data frame of a transmission aggregation layer in a GPON system; FIG. 3 is a positioning process of an abnormal ONU in a PON system according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a positioning system of an abnormal optical network unit ONU in a passive optical network system according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a positioning device of an abnormal optical network unit ONU in a passive optical network system according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to reduce the influence of abnormal ONU positioning on the normal working ONU in the system and improve the network service quality, the embodiment of the present invention provides a positioning method, system and device for an abnormal ONU in a PON system, because the optical power value of each ONU Differently, the ONUs in the system are combined to form different ONU groups. Each group of ONUs includes at least one ONU, and saves the optical power interval value of the ONU group. When there is an abnormal ONU, it determines the several ONU optical powers that are currently illuminated. The value is matched with the saved optical power interval value to determine the corresponding ONU group where the abnormal ONU is located, and the abnormal ONU is located in the ONU group. Since the ONU group contains a limited number of ONUs, the positioning range of the abnormal ONU is The reduction, thereby reducing the impact of abnormal ONU positioning on other normal working ONUs, improves network service quality.

FIG. 3 is a schematic diagram of a positioning process of an abnormal ONU in a PON system according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

S301: The optical line terminal acquires an optical power value of the ONU currently transmitting data.

When there is an abnormal ONU in the PON system, the OLT cannot perform normal analysis on the received uplink data. At this time, the OLT needs to obtain the abnormal ONU in the system by acquiring the optical power of the ONU that performs data transmission at this time. Power value, because there is an abnormal ONU in the system, the abnormal ONU is the same as the normal ONU. When the OLT directly measures the received optical power value, the sum of the illuminating light power values of different ONUs that are currently transmitting data simultaneously can be obtained.

S302: Match the optical power value to the optical power interval value saved by itself.

Specifically, in the embodiment of the present invention, the OLT itself saves the optical power interval value of each ONU group and the correspondence between the information of each ONU in the ONU group.

After acquiring the optical power value of the ONU currently transmitting data, in order to locate the range of the abnormal ONU, the optical power value is matched with the optical power interval value saved by itself, and the range of the interval in which the optical power interval value is located is determined.

S303: Determine information about each ONU in the ONU group corresponding to the optical power interval value that is successfully matched with the optical power value according to the correspondence between the optical power interval value saved by the ONU group and the information of each ONU in the ONU group, where each The ONU group includes information of at least one ONU.

After the matching is successful, the optical power interval in which the currently acquired optical power value is determined is determined, and the optical power interval value of the ONU group saved in the ONU group and the information of each ONU in the ONU group are determined. The letter of each ONU in the ONU group corresponding to the power interval value

S304: According to the information of each ONU in the ONU group, locate an abnormal ONU. Specifically, according to the information of each ONU in the ONU group, the abnormal ONU is located, including:

Sending the disabled serial number information to each ONU in the ONU group one by one, or deactivating the information to locate the abnormal ONU; or

In the embodiment of the present invention, the ONUs are arbitrarily combined according to each ONU in the PON system, and the same ONUs may be located in different ONU groups, where each ONU group is packaged. The information of at least one ONU is included, and the optical power interval value corresponding to the ONU group is measured and recorded. Specifically, in the embodiment of the present invention, the correspondence between the saved optical power interval value and the information of each ONU in the ONU group includes:

For each ONU group, measure the optical power value when each ONU in the group sends uplink data, where each ONU group includes information of any at least one ONU;

And determining an optical power interval value corresponding to the optical power value, and storing a correspondence between the optical power interval value and each ONU in the group of ONUs.

When measuring the optical power value when each ONU sends the uplink data in the group, when the m ONUs simultaneously send the uplink data, the optical line terminal measures the received optical power value, and determines the m ONUs as one. The ONU group sets the measured optical power value as the optical power value when the uplink data is sent by the group of ONUs, where m is an integer not less than 1.

Alternatively, when each ONU sends uplink data, the optical line terminal measures the optical power value of each ONU, and records information of each ONU;

The m ONUs are selected as an ONU group, and the optical power value of each ONU when the uplink data is sent is determined according to the measured optical power value of each ONU in the group, where m is an integer not less than 1.

In order to ensure that the m ONUs can simultaneously send the uplink data, the optical line terminal needs to notify the m ONUs to simultaneously send the uplink data on the same uplink bandwidth by using the downlink information, where the downlink information includes the ONU management control interface message, or Bandwidth mapping domain of downlink data frames, physical layer operation, management and maintenance messages.

Specifically, in order to ensure the accuracy of the abnormal ONU determination, in the embodiment of the present invention, the number of ONUs included in the ONU group may be subdivided, and each ONU group includes one ONU, and each ONU group includes N. The ONUs sequentially measure and record the optical power interval values corresponding to each ONU group.

When the OLT saves information for each ONU group and each ONU in the group, the OLT first Each ONU can be used as an ONU group, that is, each ONU group corresponds to a 0NU information. The OLT determines the optical power value of each ONU when each ONU sends uplink data, or the OLT allocates an uplink bandwidth to each ONU through the BWmap domain. When each ONU transmits data on the uplink bandwidth specified by the OLT, the OLT measures the optical power value of the ONU. After the OLT obtains the optical power value of each ONU, the optical power interval value corresponding to each optical power value is determined according to the adjustment interval saved by the OLT, and the corresponding relationship between the optical power interval value and the ONU information is saved. It should be noted that the optical power value sent by the ONU changes within a certain range. Therefore, the optical power value of the OLT-second measured ONU transmission data is only a value within a range, and the OLT can define a range, that is, an adjustment interval. , used to define the range of optical power transmitted by the ONU.

After that, the OLT uses any two ONUs as one ONU group. When there are n ONUs in the PON system, the OLT can determine C _n ² ONU groups including two ONUs, that is, determine C _n ² ONU groups. The OLTs allocate the same uplink bandwidth to the two ONUs in the ONU group through the BWmap. When the two ONUs respond to the uplink bandwidth allocated by the OLT, the uplink bandwidth is sent at the same time. In the uplink data, the OLT measures the received optical power value, determines the optical power interval value corresponding to the optical power value according to the measured optical power value, and the saved adjustment interval, and uses the optical power interval value as the group ONU. The optical power interval value stores the correspondence between the optical power interval value and the information of each ONU in the group of ONUs. The adjustment interval may be a range value set according to experience. Because the optical power value of the ONU is not constant, the adjustment interval is set here to ensure the success rate of subsequent optical power matching.

Similarly, when each ONU group contains three ONUs, when the PON system includes n ONUs, when determining the ONU group, it can be determined that C _n ³ ONU groups including three ONUs, that is, any three The ONU can be used as an ONU group. After each ONU group is determined, the same uplink bandwidth can be allocated to the three ONUs in each ONU group through BWmap. Thereby determining the optical power value of the ONU in the ONU group. By the way, when the 4, 5, and 6 n ONUs are included in each of the ONU groups, the above method is used to determine the correspondence between the optical power interval value of each ONU group and the information of each ONU. After the new ONU is added to the PON system, the newly added ONUs can be combined with other existing ONUs according to the above method to determine the optical power interval value of each newly added ONU group. Correspondence with the information of each ONU.

For example, when 10 ONUs are included in the PON system, the serial numbers of the 10 ONUs are respectively

When determining the ONU group, first determine the ONU group that contains one ONU. The ONU group that contains one ONU is 10, and each ONU group contains the above-mentioned ONU. Then, the OUN group containing the two ONUs is determined. Then, it can be determined that the ONU with the sequence number 1 and the serial number is

The ONUs of 2- 10 form an ONU group, respectively, and the ONU with the sequence number 2 can be numbered with

The ONUs of 3 to 10 respectively constitute an ONU group, and so on can determine C102 ONU groups including two ONUs, and then determine the ONU group including three ONUs, then it can be determined that the ONUs with sequence numbers 1 and 2 can be numbered with The ONUs of 3~10 respectively form an ONU group. The ONUs with the serial number 1 and 3 can form an ONU group with the ONUs with the serial number 4~10, and so on can determine C103 ONU groups containing three ONUs. Then, using the above method, each ONU group containing 4~10 ONUs can be determined.

When a new ONU is added to the PON system, for example, the number of the ONU is 11, the optical power interval value corresponding to the ONU group and the identification information of the newly added ONU may be increased after the new ONU is added to the group. When the newly added ONU and the other ONUs form an ONU group including two ONUs, the optical power interval value of the ONU group and the information of the ONUs in the group are determined, that is, the ONUs with the sequence number 11 are respectively determined to be 1~ The ONU of the ONU component of 10 constitutes the correspondence between the optical power interval value of each ONU group and the information of the ONU in the group, and then determines that the new ONU and the other two ONUs constitute an ONU group including three ONUs, the ONU Group of light The correspondence between the power interval value and the information of the ONU in the group, the determination process is the same as the above process, and is not described here.

After determining each ONU group, the OLT sends downlink information to the ONUs in each ONU group, and notifies each ONU in the group to simultaneously send uplink data on the same uplink bandwidth, where the downlink information includes ONU management. Control interface messages, or bandwidth mapping fields of downstream data frames, physical layer operation, management, and maintenance messages.

Specifically, in the embodiment of the present invention, the OLT may allocate the same uplink bandwidth to the ONUs in each ONU group through the BWmap, or may allocate the same uplink bandwidth to the ONUs in each ONU group through the PLOAM message, or the OLT may pass the OLT. The BWmap allocates the uplink bandwidth to one ONU, and allocates the same uplink bandwidth to the other ONUs through the PLOAM message to the other m-1 ONUs. Other optional methods are also possible. And when the OLT transmits the uplink data by using the downlink information to notify the m ONUs to simultaneously transmit the uplink data on the same uplink bandwidth, the downlink information may be encrypted to ensure the reliability of the data transmission.

When the same upstream bandwidth is allocated to the ONUs in each ONU group through the PLOAM message, the format of the PLOAM message is as shown in Table 1:

Table 1

The first byte of the message is the value of the ONU-ID, indicating that the message is sent to the ONU whose ONU-ID value is ONU-ID1; the content of the second byte indicates that the type of the PLOAM message is the structural information type of the AssignJJP BWmap message. The contents of the third to twelfth bytes are the upstream bandwidth allocated by the OLT to the ONU. The OLT can choose to encrypt the contents of the 2nd to 12th bytes of the AssignJJP BWma message, or only the contents of the 3rd to 12th bytes.

In addition, the OLT can also allocate the same uplink bandwidth to each ONU in the ONU group through the ONU Management Control Interface (OMCI) message, or the OLT can give an ONU through the BWmap. The uplink bandwidth is allocated, and the same upstream bandwidth as the above ONU is allocated to other m-1 ONUs through the OMCI message, and the OLT may also select to encrypt all or part of the content of the OMCI message. After the correspondence between the information, when there is an abnormal ONU in the PON system, the OLT acquires the optical power value of the ONU currently emitting light in the system, that is, the sum of the optical power values of the ONUs currently transmitting data. And matching the obtained optical power value of the ONU with each saved optical power interval value, and determining an optical power interval value that successfully matches the acquired optical power value of the ONU, and when the matching is successful, the current transmission may be considered as being performed. The information of the ONU is the ONU in the ONU group corresponding to the optical power interval value, that is, the abnormal ONU exists in the ONU group corresponding to the optical power interval value.

After the ONU group in which the abnormal ONU is located is determined, the serial number message is disabled to each ONU in the ONU group, or the abnormal ONU is deactivated by the deactivation message, or the uplink data transmission may be stopped by sending to all ONUs in the ONU group. The control command transmits an instruction for uplink data transmission to each ONU in the ONU group one by one, and locates the abnormal ONU.

The optical power value corresponding to the ONU group that includes the different ONUs is determined in the embodiment of the present invention, and the information about the currently transmitted ONU is determined according to the optical power value of the abnormal ONU, and then the abnormal ONU is located according to the determined information of the ONU. Thereby narrowing the range determined by the ONU, reducing the impact on the normal operation of other ONUs, and improving the service quality of the network.

FIG. 4 is a schematic structural diagram of a positioning system of an abnormal optical network unit ONU in a passive optical network system according to an embodiment of the present invention. As shown in FIG. 3, the system includes:

The optical line terminal 41 is configured to obtain an optical power value of the ONU currently transmitting data, and match the optical power value with the optical power interval value saved by the optical power interval value according to the optical power interval value saved by the ONU group and each ONU in the ONU group. Corresponding relationship of the information, determining information of each ONU in the ONU group corresponding to the optical power interval value that the optical power value matches successfully, wherein each ONU The group includes information of at least one ONU; and according to information of each ONU in the ONU group, an abnormal ONU is located.

ONU42, used to send uplink data.

The optical line terminal 41 is specifically configured to measure, for each ONU group, an optical power value when each ONU in the group sends uplink data, where each ONU group includes information of any at least one ONU; according to the optical power The value, and the saved adjustment interval, determine an optical power interval value corresponding to the optical power value, and save a correspondence between the optical power interval value and each ONU in the group of ONUs.

FIG. 5 is a schematic structural diagram of a positioning device of an abnormal optical network unit ONU in a passive optical network system according to an embodiment of the present disclosure, where the device includes:

The ear 4 block 51 is used to obtain the optical power value of the ONU currently transmitting data; the matching determining module 52 is configured to match the optical power value with the optical power interval value saved by itself; according to the optical power saved by itself The information of the interval value and the information of each ONU in the ONU group determines the information of each ONU in the ONU group corresponding to the optical power interval value that matches the optical power value, wherein each ONU group includes at least one ONU. Information

The positioning module 53 is configured to locate an abnormal ONU according to the information of each ONU in the ONU group.

The matching determination module 52 is specifically configured to measure, for each ONU group, an optical power value when each ONU in the group sends uplink data, where each ONU group includes information of any at least one ONU; according to the optical power The value, and the saved adjustment interval, determine an optical power interval value corresponding to the optical power value, and save a correspondence between the optical power interval value and each ONU in the group of ONUs.

Preferably,

The matching determining module 52 is specifically configured to: when the m ONUs simultaneously send the uplink data, the optical line terminal measures the received optical power value, and determines the m ONUs as an ONU group. And measuring the measured optical power value as the optical power value when the uplink data is sent by the group of ONUs, where m is an integer not less than 1, and determining the light corresponding to the optical power value according to the measured optical power value and the adjustment interval. The power interval value, and the correspondence between the optical power interval value and the information of each ONU in the group of ONUs is saved.

The matching determining module 52 is configured to notify the m ONUs to simultaneously send uplink data on the same uplink bandwidth by using downlink information, where the downlink information includes an ONU management control interface message, or a bandwidth of a downlink data frame. Mapping domain, physical layer operation, management and maintenance information.

Preferably,

The matching determining module 52 is specifically configured to: when each ONU sends uplink data, the optical line terminal measures the optical power value of each ONU, and records information of each ONU; selects m ONUs as an ONU group, according to the measurement The optical power value of each ONU in the group determines the optical power value when the group of ONUs sends uplink data, where m is an integer not less than 1, and the optical power value is determined according to the determined optical power value and the adjustment interval. Corresponding optical power interval value, and storing the correspondence between the optical power interval value and the information of each ONU in the group of ONUs.

The positioning module 53 is specifically configured to send the disabled serial number information to each ONU in the ONU group one by one, or deactivate the information to locate the abnormal ONU; or send the uplink data transmission to all the ONUs in the ONU group. The control command transmits an instruction for uplink data transmission to each ONU in the ONU group one by one, and locates the abnormal ONU.

Specifically, the device can be located in the OLT.

The embodiment of the invention provides a method, a system and a device for locating an abnormal ONU in a passive optical network system. In this method, because the optical power values of each ONU are different, the ONUs in the system are arbitrarily combined to form different ONU groups. Each group of ONUs includes at least one ONU, and saves the optical power interval value of the ONU group. When there is an abnormal ONU, it determines the current ONU optical power values of the current illumination, and matches the saved optical power interval values to determine Corresponding abnormality The ONU group in which the ONU is located locates the abnormal ONU in the ONU group. Because the ONU group contains a limited number of ONUs, the positioning range of the abnormal ONU is reduced, which reduces the impact on other normal working ONUs and improves the network service quality. .

The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

A method for locating an abnormal optical network unit ONU in a passive optical network system, wherein the method comprises:

2. The method according to claim 1, wherein the correspondence between the optical power terminal interval value and the information of each ONU in the ONU group is:

For each ONU group, measuring an optical power value when each ONU in the group sends uplink data, where each ONU group includes at least one ONU information;

3. The method according to claim 1, wherein the correspondence between the optical power terminal interval value and the information of each ONU in the ONU group is:

The method of claim 3, wherein before the sending the uplink data by the m ONUs, the method further includes: The optical line terminal notifies the m ONUs to simultaneously send uplink data on the same uplink bandwidth by using downlink information, where the downlink information includes an ONU management control interface message, or a bandwidth mapping domain of a downlink data frame, or a physical layer. Operation, management, and maintenance messages.

The method according to claim 1, wherein the optical line terminal saves the correspondence between the optical power interval value and the information of each ONU in the ONU group as follows:

6. The method according to claim 1, wherein, according to the information of each ONU in the ONU group, the ONU that locates the abnormality is:

A positioning device for an abnormal ONU in a passive optical network system, wherein the device comprises: an acquisition module, a matching determination module, and a positioning module; wherein

The obtaining module is configured to obtain an optical power value of an ONU that is currently performing data transmission; the matching determining module is configured to match the optical power value with the saved optical power interval value; according to the saved optical power interval value and The correspondence between the information of each ONU in the ONU group determines the ONU of each ONU group corresponding to the optical power interval value that matches the optical power value. Information

The apparatus according to claim 7, wherein the matching determining module is specifically configured to measure, for each ONU group, an optical power value when each ONU in the group sends uplink data, where each ONU group And including the information of the at least one ONU; determining the optical power interval value corresponding to the optical power value according to the measured optical power value, and the saved adjustment interval, and saving the optical power interval value and each ONU of the group of ONUs Correspondence of information.

The apparatus according to claim 7, wherein the matching determining module is specifically configured to: when the m ONUs simultaneously send uplink data, measure the received optical power value, and determine the m ONUs as an ONU group. And measuring the measured optical power value as the optical power value when the group of ONUs sends uplink data, where m is an integer not less than 1.

The apparatus according to claim 9, wherein the matching determining module is configured to notify the m ONUs to simultaneously send uplink data on the same uplink bandwidth by using downlink information, where the downlink information includes The ONU manages control interface messages, or bandwidth mapping fields of downlink data frames, physical layer operation, management, and maintenance messages.

The apparatus according to claim 7, wherein the matching determining module is specifically configured to: when each ONU sends uplink data, measure an optical power value of each ONU, and record information of each ONU; The ONUs are used as an ONU group, and according to the measured optical power value of each ONU in the group, the optical power value when the uplink data is sent by the group of ONUs is determined, and the optical power value is determined according to the determined optical power value and the adjustment interval. The optical power interval value, and the correspondence between the optical power interval value and the information of each ONU in the group of ONUs is saved, where m is an integer not less than 1.

The device according to claim 7, wherein the positioning module is specifically configured to send the disabled serial number information to each ONU in the ONU group one by one, or deactivate the information, and the positioning occurs. An abnormal ONU; or specifically, is configured to send a control command for stopping uplink data transmission to all ONUs in the ONU group, and then send an instruction for uplink data transmission to each ONU in the ONU group one by one, and locate an abnormal ONU.

13. A positioning system for an abnormal ONU in a passive optical network system, wherein the system includes an optical line terminal and an ONU, wherein

The optical line terminal includes the positioning device of the abnormal ONU in the passive optical network system according to any one of claims 7 to 12,

ONU, used for data transmission.