CN117560071A - Double-end-protection ONU terminal communication method, optical network channel and system - Google Patents

Double-end-protection ONU terminal communication method, optical network channel and system Download PDF

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Publication number
CN117560071A
CN117560071A CN202311381197.3A CN202311381197A CN117560071A CN 117560071 A CN117560071 A CN 117560071A CN 202311381197 A CN202311381197 A CN 202311381197A CN 117560071 A CN117560071 A CN 117560071A
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China
Prior art keywords
olt
onu
equipment
terminal
onu terminal
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CN202311381197.3A
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Chinese (zh)
Inventor
胡庭彪
张宏伟
邓泽禧
潘志锋
何文豪
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Guangdong Xintong Communication Co ltd
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Guangdong Xintong Communication Co ltd
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Priority to CN202311381197.3A priority Critical patent/CN117560071A/en
Publication of CN117560071A publication Critical patent/CN117560071A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/038—Arrangements for fault recovery using bypasses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention discloses a double-end protected ONU (optical network Unit) terminal communication method, an optical network channel and a system, wherein an ONU terminal is connected with two OLT (optical line terminal) devices to form a double-end protected communication link; the ONU terminal acquires the equipment information of all connected OLT equipment; the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy; and finally, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, and selecting the OLT device with the highest score as the main access device. The dual-end protection can be realized, the ONU terminal can adaptively select proper OLT equipment for connection, the condition that one OLT equipment is jammed and one OLT equipment is idle is avoided, and the utilization rate of hardware equipment and the reliability of network communication are improved.

Description

Double-end-protection ONU terminal communication method, optical network channel and system
Technical Field
The invention relates to the field of power transmission intellectualization, in particular to an ONU terminal communication method, an optical network channel and a system with double-end protection.
Background
The communication system plays an indispensable supporting role for the safe and economic operation of the power system, along with the continuous improvement of the demand of the power market and the rapid development of the optical fiber communication technology, the construction of the intelligent power grid has become a necessary trend, and the optical copper advance and retreat has become a necessary choice of the power communication technology. GPON technology is the most widely used fiber access technology with the natural technology and cost advantages, has a network architecture which is quite similar to that of a power distribution network, and is very suitable for being applied to a power distribution automation system. The OLT equipment of the GPON optical network channel is arranged in the transformer substation, the ONU terminals are arranged at the power distribution terminals, and the ONU terminals are connected with the OLT equipment through a passive optical network.
The problem of the existing GPON optical network channel is that once a certain communication node in the middle is disconnected, the following ONU terminals cannot be connected with the OLT equipment, and the main station server cannot be connected, so that the service of a corresponding area is interrupted. In the prior art, the problem is solved by adopting a double-end protection mode, namely, two OLT devices are arranged to form two optical fiber channels, each ONU device is connected with two OLT devices, and even if one communication node is disconnected, the ONU device can be connected with a master station server through the other OLT device. However, although the ONU terminal is connected to two OLT devices, at present, the ONU terminal can only manually switch the connected OLT devices, which easily causes that all ONU terminals are connected to the master station through one OLT device, one OLT device has a large load pressure, and the other OLT device is in an idle state, which causes waste of hardware resources.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the double-end protection ONU terminal communication method, the optical network channel and the system, which can realize the double-end protection of transmission line communication and enable the ONU terminal to adaptively select proper OLT equipment for connection.
According to an embodiment of the invention, the ONU terminal communication method with double-end protection is applied to an optical fiber line between two substations, and comprises the following steps:
the ONU terminal is respectively connected with the OLT equipment of the previous-stage substation and the OLT equipment of the latter-stage substation to form a double-end protection communication link;
the ONU terminal acquires the equipment information of all connected OLT equipment;
the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy;
and the ONU terminal comprehensively evaluates the two connected OLT devices according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selects the OLT device with the highest score as the main access device, and selects the other OLT device as the secondary access device.
The ONU terminal communication method with double-end protection according to the embodiment of the first aspect of the invention has at least the following beneficial effects:
firstly, an ONU terminal is respectively connected with the OLT equipment of a previous-stage substation and the OLT equipment of a later-stage substation to form a double-end protection communication link; then the ONU terminal acquires the equipment information of all connected OLT equipment; then the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy; and finally, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selecting the OLT device with the highest score as the main access device, and selecting the other OLT device as the secondary access device. The ONU terminal can adaptively select the most suitable OLT equipment as the main access equipment to be connected with the main station server according to the comprehensive score, and the other OLT equipment as the secondary access equipment to be used as the backup, so that double-end protection can be realized, the ONU terminal can adaptively select the suitable OLT equipment to be connected, the condition that one OLT equipment is jammed and one OLT equipment is idle is avoided, and the utilization rate of hardware equipment and the reliability of network communication are improved.
According to some embodiments of the present invention, in the step of the ONU terminal obtaining device information of all connected OLT devices, the device information includes a transmission distance and a priority of the OLT device and the ONU terminal.
According to some embodiments of the present invention, the specific steps of the ONU terminal calculating the weight value of each OLT device according to the device information of the OLT device in combination with the load balancing policy are:
acquiring equipment information and bandwidth utilization rate of each OLT equipment as reference indexes;
normalizing the reference index to obtain a normalized index;
according to the load balancing strategy, determining the weight distribution modes of different indexes;
and calculating the weight of each OLT device according to the normalization index and the weight distribution mode.
According to some embodiments of the invention, the normalization indicator includes a normalized bandwidth utilization, a normalized transmission distance, and a normalized load status.
According to some embodiments of the present invention, the calculation formula for calculating the weight of each OLT apparatus according to the normalization index and the weight distribution manner is as follows
W＝w1*X1+w2*X2+w3*X3；
Wherein W is the weight of the corresponding OLT equipment, X1 is the normalized bandwidth utilization, X2 is the normalized transmission distance, X3 is the normalized load state, and W1, W2 and W3 are different weight factors respectively.
According to some embodiments of the invention, the method further comprises a switching step of switching to the secondary access device for connection if the communication link between the ONU terminal and the primary access device is disconnected.
According to some embodiments of the present invention, when the ONU terminal connects with the secondary access device, it detects in real time whether the communication state with the primary access device is normal, if so, it immediately switches to the primary access device for connection, and if not, it continues to connect with the secondary access device.
The power transmission line GPON optical network channel according to the embodiment of the second aspect of the invention is applied between two substations and comprises first OLT equipment, wherein the first OLT equipment is arranged in a previous-stage substation; the second OLT equipment is arranged in the post-stage substation; and the ONU terminals are respectively arranged on a power transmission line between the front-stage substation and the rear-stage substation and are respectively connected with the first OLT equipment and the second OLT equipment through optical fibers.
The transmission line GPON optical network channel according to the embodiment of the second aspect of the invention has at least the following beneficial effects:
firstly, an ONU terminal is respectively connected with the OLT equipment of a previous-stage substation and the OLT equipment of a later-stage substation to form a double-end protection communication link; then the ONU terminal acquires the equipment information of all connected OLT equipment; then the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy; and finally, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selecting the OLT device with the highest score as the main access device, and selecting the other OLT device as the secondary access device. The ONU terminal can adaptively select the most suitable OLT equipment as the main access equipment to be connected with the main station server according to the comprehensive score, and the other OLT equipment as the secondary access equipment to be used as the backup, so that double-end protection can be realized, the ONU terminal can adaptively select the suitable OLT equipment to be connected, the condition that one OLT equipment is jammed and one OLT equipment is idle is avoided, and the utilization rate of hardware equipment and the reliability of network communication are improved.
According to some embodiments of the invention, the ONU terminal is spaced apart by a distance of 3-5km.
According to a third aspect of the invention, the power transmission system comprises the power transmission line GPON optical network channel.
The power transmission system according to the embodiment of the third aspect of the present invention has at least the following advantages:
firstly, an ONU terminal is respectively connected with the OLT equipment of a previous-stage substation and the OLT equipment of a later-stage substation to form a double-end protection communication link; then the ONU terminal acquires the equipment information of all connected OLT equipment; then the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy; and finally, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selecting the OLT device with the highest score as the main access device, and selecting the other OLT device as the secondary access device. The ONU terminal can adaptively select the most suitable OLT equipment as the main access equipment to be connected with the main station server according to the comprehensive score, and the other OLT equipment as the secondary access equipment to be used as the backup, so that double-end protection can be realized, the ONU terminal can adaptively select the suitable OLT equipment to be connected, the condition that one OLT equipment is jammed and one OLT equipment is idle is avoided, and the utilization rate of hardware equipment and the reliability of network communication are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a flowchart of an ONU terminal communication method with double-ended protection in an embodiment of the present invention;
fig. 2 is a schematic diagram of a GPON optical network channel of a transmission line in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a single core failure in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a double-ended fault at a node of a single core in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a circuit core anomaly in an embodiment of the present invention;
FIG. 6 is a schematic illustration of a station with one end broken away of a length of fiber optic cable in accordance with an embodiment of the present invention;
fig. 7 is a schematic diagram of a station in which both access ends of a section of optical cable are disconnected in an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, the ONU terminal communication method with double-end protection is applied to an optical fiber line between two substations, and includes the following steps:
s100, respectively connecting an ONU terminal with the OLT equipment of a previous-stage substation and the OLT equipment of a later-stage substation to form a double-end protection communication link;
specifically, an optical cable joint box is arranged at two ends of each strain section of the power transmission line between the front-stage power substation and the rear-stage power substation, tail fibers can be led out of the optical cable joint boxes to be connected into the passive optical splitter and the ONU terminal, an OLT device is respectively arranged at the front-stage power substation and the rear-stage power substation, a power transmission GPON optical network channel is built, network access requirements of various power transmission on-line monitoring terminals such as a camera are met, and a double-end protection communication link is formed through the two OLT devices.
S200, the ONU terminal acquires equipment information of all connected OLT equipment;
specifically, the device information includes a transmission distance between the OLT device and the ONU terminal, a priority and a load state, where the transmission distance refers to a transmission distance between the OLT device and the ONU terminal, attenuation is necessarily present if the transmission distance is long, and it is obvious that the ONU terminal should select an OLT device with a shorter transmission distance to connect under the condition that other conditions are equal, and the priority refers to that the OLT device can set an artificial priority according to a performance state of the OLT device, a level and a quality condition of the OLT device corresponding to the optical fiber, for example, the performance state of the front-stage OLT device is better, and the performance state of the rear-stage OLT device is worse, and then the priority of the front-stage OLT device is set to be greater than the priority of the rear-stage OLT device. It should be understood that, where the weight value of the priority is low, the ONU terminal will determine according to the priority only if other conditions are the same. Of course, the same priority may be set for all OLT devices, that is, the two optical communication lines and the related devices are identical, and the load state refers to the current loading situation of the OLT device, for example, how many connected devices and the current port power.
S300, the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy;
specifically, the specific steps of step S300 are as follows:
s301, acquiring equipment information and bandwidth utilization rate of each OLT equipment as reference indexes;
specifically, in the embodiment of the present invention, priority is not considered, and the reference indexes include bandwidth utilization, transmission distance and load status.
S302, normalizing the reference index to obtain a normalized index;
it should be noted that, the reference index is normalized to be in a uniform range, for example, between 0 and 1. The normalization can ensure that the weight calculation results of different indexes are comparable, and specifically, the normalization indexes in the embodiment of the invention comprise the normalization bandwidth utilization rate, the normalization transmission distance and the normalization load state.
S303, determining weight distribution modes of different indexes according to a load balancing strategy;
specifically, for example, OLT equipment with a lower bandwidth utilization obtains a higher weight, so as to share more transmission services. Therefore, the balanced distribution of the bandwidth can be realized, the performance and the stability of the whole network are improved, the OLT equipment with smaller transmission distance obtains higher weight, the OLT equipment with smaller load state obtains higher weight, the hardware utilization rate and the loan utilization rate of the whole network equipment can be improved, and the overall transmission reliability and the transmission efficiency are improved.
S304, calculating the weight of each OLT device according to the normalization index and the weight distribution mode.
Specifically, in the embodiment of the present invention, according to the normalization index and the weight distribution manner, a calculation formula for calculating the weight of each OLT apparatus is
W＝w1*X1+w2*X2+w3*X3；
Wherein W is the weight of the corresponding OLT equipment, X1 is the normalized bandwidth utilization rate, X2 is the normalized transmission distance, X3 is the normalized load state, W1 is the weight factor of the bandwidth utilization rate, W2 is the weight factor of the band transmission distance, and W3 is the weight factor of the load state. In this embodiment w1 is greater than w3 and greater than w2.
And S400, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selecting the OLT device with the highest score as the main access device, and selecting the other OLT device as the secondary access device.
In step S400, the transmission delay refers to a non-disconnection condition, and if the communication link between the ONU terminal and the primary access device is disconnected, the ONU terminal is switched to the secondary access device to connect. And when the ONU terminal is connected with the secondary access equipment, detecting whether the communication state with the primary access equipment is normal or not in real time, if so, immediately switching to the primary access equipment for connection, and if not, continuing to connect with the secondary access equipment. After the node is temporarily disconnected and recovered, all ONU terminals are connected with the main station through one OLT device, and the condition that the OLT device fails due to the fact that the load is too high for a long time is avoided.
Referring to fig. 2, the present invention further relates to a transmission line GPON optical network channel for running the method described in the foregoing embodiment, which is applied between two substations, and includes a first OLT device, a second OLT device, and a plurality of ONU terminals, where the first OLT device is installed in a previous-stage substation; the second OLT equipment is arranged in the post-stage substation; the ONU terminals are respectively arranged on a power transmission line between the front-stage power substation and the rear-stage power substation, and are respectively connected with the first OLT equipment and the second OLT equipment through optical fibers.
Specifically, two ends of each strain section of the power transmission line are respectively provided with an optical cable joint box, tail fibers can be led out from the optical cable joint boxes to be connected into the passive optical splitter and the ONU terminal, an OLT device is respectively deployed at two substations, a power transmission GPON optical network channel is built, the network access requirements of various power transmission on-line monitoring terminals such as cameras can be met, and double-end protection is realized.
Specifically, in the embodiment of the invention, the interval setting distance of the ONU terminals is 3-5km. The first OLT equipment and the second OLT equipment are respectively connected into the power grid intranet switch, and the first OLT equipment and the second OLT equipment are respectively provided with two interfaces, namely a northbound optical port and a network port.
The optical cable connector is connected to an ONU terminal through a 1:2 unequal ratio passive optical splitter at the connector, and the ONU terminal is connected to an on-line monitoring terminal through a network port.
The specific application scenarios of double-end protection of the transmission line GPON optical network channel in the invention are described below through a few specific scenarios.
Referring to fig. 3, scenario 1: the fiber core of a certain node of the main line of the station is disconnected, namely a single fiber core fault occurs;
after a main line single fiber core in the scene 1 is disconnected, equipment connected with the ONU1 can be accessed from a main OLT, equipment connected with the ONU2 can be accessed from a standby OLT, and the service is not interrupted; after the link is restored, the equipment connected with the ONU1 can be accessed from the main OLT; the devices connected to ONU2 and ONU3 can access from the standby OLT.
Referring to fig. 4, scenario 2: the two ends of the core in and out of a certain section of the station are disconnected, namely the two ends of a certain node of a single fiber core are failed.
After fiber cores at two ends of an ONT2 node of a main line in a scene 2 are disconnected, equipment connected with an ONU1 can be accessed from a main OLT, equipment connected with ONUs 2 and 3 can be accessed from a standby OLT, and the service is not interrupted; after the link is restored, the equipment connected with the ONU1 can be accessed from the main OLT; the devices connected to ONU2 and ONU3 can access from the standby OLT.
Referring to fig. 5, scenario 3: and both ends of a single fiber core of an OLT at a station are disconnected, namely, the line fiber core is abnormal.
After fiber cores at two ends of an ONU2 entering a station in a scene 3 are simultaneously disconnected, equipment connected with the ONU1 can be accessed from a main OLT, equipment connected with the ONU3 can be accessed from a standby OLT, and services of the ONT1 and the ONT3 are not interrupted; after the link is restored, ONU2 communicates from the OLT that restored the line connection first.
Referring to fig. 6, scenario 4: one end of a certain section of optical cable of the station is disconnected, namely, the main optical fiber and the standby optical fiber at one end of the ONU2 are all disconnected.
After an optical cable at one end of the ONU2 is disconnected at the same time, equipment connected with the ONU1 can be accessed from the main OLT, equipment connected with the ONU2 and the ONU3 can be accessed from the standby OLT, and the service is not interrupted; after the link is restored, the equipment connected with the ONU1 can be accessed from the main OLT; the devices connected to ONU2 and ONU3 can access from the standby OLT.
Referring to fig. 7, scene 5: the two ends of a certain section of optical cable at the station are disconnected.
After the ONU2 double-end optical cable is disconnected at the same time, the equipment connected with the ONU1 can be accessed from the main OLT, the equipment connected with the ONU3 can be accessed from the standby OLT, and the services of the ONT1 and the ONT3 are not interrupted; after the link is restored, ONU2 communicates from the OLT that restored the line connection first.
The invention also relates to a power transmission system comprising the power transmission line GPON optical network channel of the embodiment.
To sum up, in the embodiment of the present invention, firstly, an ONU terminal is connected to an OLT device of a preceding-stage substation and an OLT device of a subsequent-stage substation respectively to form a double-end protection communication link; then the ONU terminal acquires the equipment information of all connected OLT equipment; then the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy; and finally, comprehensively evaluating the two connected OLT devices by the ONU terminal according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selecting the OLT device with the highest score as the main access device, and selecting the other OLT device as the secondary access device. The ONU terminal can adaptively select the most suitable OLT equipment as the main access equipment to be connected with the main station server according to the comprehensive score, and the other OLT equipment as the secondary access equipment to be used as the backup, so that double-end protection can be realized, the ONU terminal can adaptively select the suitable OLT equipment to be connected, the condition that one OLT equipment is jammed and one OLT equipment is idle is avoided, and the utilization rate of hardware equipment and the reliability of network communication are improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (10)

1. The ONU terminal communication method with double-end protection is applied to an optical fiber line between two substations, and is characterized by comprising the following steps:
the ONU terminal is respectively connected with the OLT equipment of the previous-stage substation and the OLT equipment of the latter-stage substation to form a double-end protection communication link;
the ONU terminal acquires the equipment information of all connected OLT equipment;
the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device and the load balancing strategy;
and the ONU terminal comprehensively evaluates the two connected OLT devices according to the weight value and the transmission delay to obtain the comprehensive score of each OLT device, selects the OLT device with the highest score as the main access device, and selects the other OLT device as the secondary access device.
2. The ONU-terminal communication method according to claim 1, wherein in the ONU-terminal acquiring device information of all connected OLT devices, the device information includes a transmission distance and a priority of the OLT device and the ONU-terminal.
3. The ONU-terminal communication method of claim 1, wherein the ONU terminal calculates the weight value of each OLT device according to the device information of the OLT device in combination with a load balancing policy, by:
acquiring equipment information and bandwidth utilization rate of each OLT equipment as reference indexes;
normalizing the reference index to obtain a normalized index;
according to the load balancing strategy, determining the weight distribution modes of different indexes;
and calculating the weight of each OLT device according to the normalization index and the weight distribution mode.
4. The ONU-terminal communication method according to claim 3, wherein the normalization indexes include a normalized bandwidth utilization, a normalized transmission distance and a normalized load state.
5. The ONU terminal communication method according to claim 4, wherein the calculation formula for calculating the weight of each OLT apparatus according to the normalization index and the weight distribution method is as follows
W＝w1*X1+w2*X2+w3*X3；
Wherein W is the weight of the corresponding OLT equipment, X1 is the normalized bandwidth utilization, X2 is the normalized transmission distance, X3 is the normalized load state, and W1, W2 and W3 are different weight factors respectively.
6. The ONU-terminal communication method according to claim 1, further comprising a switching step of switching to the secondary access device for connection if the communication link between the ONU terminal and the primary access device is disconnected.
7. The ONU-terminal communication method according to claim 6, wherein the ONU terminal is connected to the secondary access device by detecting in real time whether the communication state with the primary access device is normal, and if so, immediately switching to the primary access device for connection, and if not, continuing to connect to the secondary access device.
8. A transmission line GPON optical network channel for operating the method of any one of claims 1 to 7, applied between two substations, characterized by comprising
The first OLT equipment is arranged in the previous-stage transformer station;
the second OLT equipment is arranged in the post-stage substation;
and the ONU terminals are respectively arranged on a power transmission line between the front-stage substation and the rear-stage substation and are respectively connected with the first OLT equipment and the second OLT equipment through optical fibers.
9. The transmission line GPON optical network channel according to claim 7, wherein the ONU terminals are spaced apart by a distance of 3-5km.
10. A power transmission system comprising the power transmission line GPON optical network channel of claims 8-9.
CN202311381197.3A 2023-10-23 2023-10-23 Double-end-protection ONU terminal communication method, optical network channel and system Pending CN117560071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311381197.3A CN117560071A (en) 2023-10-23 2023-10-23 Double-end-protection ONU terminal communication method, optical network channel and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311381197.3A CN117560071A (en) 2023-10-23 2023-10-23 Double-end-protection ONU terminal communication method, optical network channel and system

Publications (1)

Publication Number Publication Date
CN117560071A true CN117560071A (en) 2024-02-13

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