Optical fiber ring network method
By using the optical terminal equipment area as nodes in the optical fiber ring network, forming an initial tree structure and reducing its dimension to a ring structure, the problem of unstable construction and commissioning of optical fiber ring networks in wind power and photovoltaic projects is solved, and the reliability and consistency of optical fiber ring network connections are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
- Filing Date
- 2023-05-19
- Publication Date
- 2026-06-26
AI Technical Summary
The fiber optic ring network method is difficult to ensure the realization of the design intent during the construction and commissioning phase of wind power and photovoltaic projects, resulting in unstable communication status and difficulty in detecting problems during maintenance.
By using the concentrated area of optical terminal equipment as nodes to form an initial tree structure, nodes with too many optical cable connection directions are split off. The tree structure is reduced to a ring structure by adopting the principle of cross-node and cross-branch. The optical fiber connection strategy is determined according to the optical cable direction of the nodes and the presence of optical terminal equipment to form an optical fiber ring network.
It achieves reliable and consistent fiber optic ring network connections, ensuring rapid determination of fiber optic cable connection schemes and construction quality, and reducing the difficulty in construction and maintenance.
Smart Images
Figure CN116545536B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical fiber technology, and in particular to a method for building an optical fiber ring network. Background Technology
[0002] The correctness of fiber optic splicing determines the difficulty of on-site construction and maintenance. Unlike radial networks, where faults can be quickly identified through simple testing of end-point equipment, ring networks present significant challenges. If the ring network requirements are not met during the construction and commissioning phase, the actual topology may form a chain-like communication structure, resulting in "faulty" operation. This condition makes it even more difficult to detect during maintenance. In related technologies, wind power and photovoltaic projects often employ ring network communication. The design and construction cycles for wind power and photovoltaic projects are generally short, often less than half a month from line connection, fiber splicing, and grid connection, placing high demands on the design schedule. Therefore, designing a reliable fiber optic ring network topology is an urgent problem to be solved. Summary of the Invention
[0003] This application aims to at least partially address one of the technical problems in the related art.
[0004] To achieve the above objectives, this application proposes a fiber optic ring network construction method, comprising: taking the area where optical terminal equipment to be connected by optical cables is centrally arranged as nodes; obtaining an initial tree structure formed by connecting nodes according to the connection planning information of the area where optical terminal equipment is centrally arranged; determining the number of optical cable connection directions corresponding to each node in the initial tree structure; when the number of optical cable connection directions of any node is greater than 3, splitting the node into multiple identical nodes so that the number of optical cable connection directions of each node is less than or equal to 3, thereby obtaining a target tree structure, wherein the optical cable direction is determined by the two nodes connected by the optical cable; determining the first and last nodes; for other nodes besides the first and last nodes, combining the principle of connecting one node across one node and the principle of connecting one branch across one branch, reducing the target tree structure to a ring structure; determining the optical fiber connection strategy corresponding to the node according to the number of optical cable directions of each node and whether there are optical terminal equipment that need to be connected in each node, and performing optical fiber connection according to the optical fiber connection strategy to form an optical fiber ring network.
[0005] According to one embodiment of this application, the optical cable includes N optical fiber cores, where N is an even number greater than zero, and the node contains less than or equal to N / 2 sets of receiver ports Rx and transmitter ports T. X .
[0006] According to one embodiment of this application, the fiber optic connection strategy corresponding to each node is determined based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node. This includes: designating a node corresponding to one optical cable direction and without any optical terminal devices that need to be connected within the node as a first node; short-circuiting fiber 1 core to fiber N core in the optical cable of each first node, connecting fiber 2 core to fiber N-1 core, and so on, until fiber M core is connected to fiber N-M+1 core, wherein M... <N / 2。
[0007] According to one embodiment of this application, the fiber optic connection strategy corresponding to a node is determined based on the number of optical cable directions at each node and whether there is an optical terminal device that needs to be connected within each node. The method further includes: designating a node corresponding to one optical cable direction and containing an optical terminal device that needs to be connected as a second node; determining a target second node from all second nodes; and connecting the first group of Rx of the target second node to fiber optic core 1. X Connected to the N core of the optical fiber, the second group T X The first group of Rx is connected to fiber 2 core, the second group of Rx is connected to fiber N-1 core, the third group of Rx is connected to fiber 3 core, and the third group of T... X Connected to fiber N-2 core, fourth group T X Connect the fourth group of Rx to the fourth fiber core, and connect the fourth group of Rx to the N-3 fiber core, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
[0008] According to one embodiment of this application, after determining a target second node from all second nodes, the method further includes: taking all second nodes other than the target second node as remaining second nodes, and assigning a first group T to each remaining second node. X Connected to fiber 1 core, the first group of Rx is connected to fiber N core, the second group of Rx is connected to fiber 2 core, and the second group of T... X Connected to fiber N-1 core, third group T X The third Rx group is connected to fiber core 3, the fourth Rx group is connected to fiber core N-2, and the fourth T group is connected to fiber core 4. X Connect to fiber N-3 cores, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
[0009] According to one embodiment of this application, the fiber connection strategy corresponding to the node is determined based on the number of optical cable directions at each node and whether there is an optical terminal device that needs to be connected within each node. The method further includes: taking a node that corresponds to two optical cable directions and does not have an optical terminal device that needs to be connected within the node as a third node; splicing the fiber 1 core of the first optical cable direction with the fiber 1 core of the second optical cable direction at the third node; splicing the fiber 2 core of the first optical cable direction with the fiber 2 core of the second optical cable direction; and so on, until the fiber cores of the first optical cable direction and the fiber cores of the second optical cable direction are spliced one by one.
[0010] According to one embodiment of this application, the fiber optic connection strategy corresponding to each node is determined based on the number of optical cable directions at each node and whether there are optical terminal devices that need to be connected within each node. This includes: designating nodes corresponding to two optical cable directions and containing optical terminal devices that need to be connected as fourth nodes; determining whether each fourth node is a cross-node in the principle of connecting one node to another and the principle of connecting one branch to another; and responding if the fourth node is not a cross-node, connecting the first optical fiber core of the fourth node in the first optical cable direction to the first group of T... X Connected, fiber 1 in the second optical cable direction is connected to the first group of Rx, fiber 2 in the first optical cable direction is connected to the second group of Rx, and fiber 2 in the second optical cable direction is connected to the second group of T. X Connect them, and so on, until the N / 2 core of the first optical cable direction is connected to the N / 2 group of Rx, and the N / 2 core of the second optical cable direction is connected to the N / 2 group of T. X Connect them, and fuse the remaining fiber N / 2+1 cores to fiber N cores in the first and second optical cable directions one by one.
[0011] According to one embodiment of this application, the optical fiber ring network method further includes: in response to the fourth node being a cross-node, splicing fiber cores 1 to N / 2 in the first optical cable direction and the second optical cable direction of the fourth node one-to-one, and connecting the remaining fiber cores N in the first optical cable direction to the first group Rx, and connecting the fiber cores N in the second optical cable direction to the first group T. X Connected, the N-1 core of the first optical cable is connected to the second group T X Connect the fiber N-1 core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the fourth node are connected.
[0012] According to one embodiment of this application, the fiber connection strategy corresponding to a node is determined based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node. The method further includes: designating a node with three optical cable directions and no optical terminal devices that need to be connected within the node as the fifth node; splicing fiber 1 to fiber N / 2 in the first and third optical cable directions of the fifth node one-to-one; splicing fiber N / 2+1 to fiber N in the first and second optical cable directions one-to-one; connecting fiber 1 in the second optical cable direction to fiber N in the third optical cable direction; connecting fiber 2 in the second optical cable direction to fiber N-1 in the third optical cable direction; and so on, until all remaining fiber cores of the fifth node are connected.
[0013] According to one embodiment of this application, the fiber optic connection strategy for each node is determined based on the number of optical cable directions at each node and whether there are optical terminal devices that need to be connected within each node. The method further includes: designating a node corresponding to three optical cable directions and containing optical terminal devices that need to be connected as the sixth node; splicing fiber cores 1 to N / 2 in the first and third optical cable directions of the sixth node one-to-one; connecting fiber core 1 in the second optical cable direction to fiber core N in the third optical cable direction; and connecting the second optical cable... Connect the 2nd fiber core in the first optical cable direction to the N-1th fiber core in the third optical cable direction, and so on, until the N / 2th fiber core in the second optical cable direction is connected to the N / 2+1th fiber core in the third optical cable direction. Connect the Nth fiber core in the first optical cable direction to the first group of Rx, the Nth fiber core in the second optical cable direction to the first group of TX, the N-1th fiber core in the first optical cable direction to the second group of TX, the N-1th fiber core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the sixth node are connected.
[0014] According to one embodiment of this application, adjusting the order of optical cable cores and the order or number of groups of Rx and Tx of the connected optical fiber cores to form a ring network is also used as the optical fiber connection strategy.
[0015] This application achieves at least the following beneficial effects:
[0016] This application uses a tree structure to describe the optical cable connection topology of multiple optical terminal equipment concentrated in an area. In order to ensure that the distance between each node is as uniform as possible, the tree structure is described as a ring network structure by adopting the principle of "spanning one after another". Then, according to the connection order of the tree structure and the ring network structure, a templated connection method is used for each node to quickly determine the fiber splicing scheme for each concentrated area of optical terminal equipment, thus ensuring the consistency and reliability of the fiber splicing scheme. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
[0018] Figure 1 This is a schematic diagram illustrating an exemplary implementation of a fiber optic ring network method according to one embodiment of this application.
[0019] Figure 2 This is a schematic diagram illustrating a node splitting process according to an embodiment of this application.
[0020] Figure 3 This is a schematic diagram illustrating an embodiment of the present application of an optical cable connection that does not span nodes.
[0021] Figure 4 This is a schematic diagram illustrating an embodiment of the present application of an optical cable connected across one node to another.
[0022] Figure 5 This is a schematic diagram illustrating an embodiment of the present application of an optical cable connected across a branch and then to a branch node.
[0023] Figure 6 This application illustrates an embodiment with only two sets of T. X A schematic diagram of the optical cable connection at the second node of Rx.
[0024] Figure 7 This application illustrates an embodiment of a method comprising multiple sets of T X A schematic diagram of the optical cable connection at the second node of Rx.
[0025] Figure 8 This is a schematic diagram illustrating a non-crossing node optical cable connection in a fourth node according to an embodiment of this application.
[0026] Figure 9 This is a schematic diagram illustrating an optical cable connection across a node in a fourth node according to an embodiment of this application. Detailed Implementation
[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0028] The following is a description of some of the technical terms used in this application:
[0029] Fiber optic ring network: A fiber optic ring network is a computer network topology based on optical fibers, consisting of one or more optical fibers forming a ring network. In a fiber optic ring network, data is transmitted along a ring path, and each node can receive and send data.
[0030] Fiber core number order: The order of optical fibers is determined by their unique colors. Numbers 1, 2, 3, 4... can be assigned to specific colors, and colors cannot be repeated. The number of fiber cores is generally even. For an N-core optical cable, the order of the fibers can be determined by their colors as 1, 2, 3, 4... N.
[0031] Fiber optic receiver port: The port for receiving information in optical terminal equipment. It is a device used to convert optical signals into electrical signals and receive them. It is abbreviated as Rx. For example, a single ring structure has 1 Rx and a double ring structure has 2 Rx.
[0032] Fiber optic transmitter port: The port through which optical terminal equipment transmits information. It is used to convert electrical signals into corresponding optical signals and transmit the signals through optical fibers. It is abbreviated as Tx. For example, a single ring structure has 1 Tx and a double ring structure has 2 Tx.
[0033] This application must meet the following basic conditions for forming a fiber optic ring network:
[0034] (1) For multiple optical terminal equipment centralized deployment areas with a known optical cable path, each optical terminal equipment centralized deployment area can contain multiple types of optical terminal equipment, or it can not contain optical terminal equipment.
[0035] (2) Optical cables connect the centralized deployment area of various optical terminal equipment, and the optical fibers in the optical cables support the connection of the optical terminal equipment contained in the centralized deployment area.
[0036] (3) Different types of optical terminal equipment can form different optical fiber ring networks according to different protocols.
[0037] Figure 1 This is a schematic diagram of an exemplary implementation of a fiber optic ring network topology method shown in this application, as follows: Figure 1 As shown, this fiber optic ring network topology method includes the following steps:
[0038] S101, take the area where the optical terminal equipment to be connected is concentrated as a node, and obtain the initial tree structure formed by connecting the nodes according to the connection planning information of the area where the optical terminal equipment is concentrated.
[0039] The centralized deployment area for optical terminal equipment, also known as the node in this application, refers to an area where one or more units requiring networking are centrally located. In the case of a wind farm, the centralized deployment area for optical terminal equipment refers to the area where wind turbines, transformer substations, and overhead lines are located. This area contains facilities such as "wind turbine data acquisition and monitoring control systems," "transformer substation monitoring and control," and "video surveillance" that can be connected via a fiber optic ring network, or optical cable junction boxes installed on overhead line towers for use without connecting the equipment. In the case of a photovoltaic (PV) photovoltaic (PV) photovoltaic (PV) photovoltaic (PV) photovoltaic (PV) photovoltaic (PV) inverter data acquisition devices, and "PV PID modules" are installed in the area where data acquisition devices, transformer substations, and cable branch boxes are located, or optical cable junction boxes installed at cable branch boxes for use without connecting the equipment.
[0040] In this application, the optical cable mentioned includes N optical fiber cores, where N is an even number greater than zero, and the node contains less than or equal to N / 2 sets of receiver ports Rx and transmitter ports T. X .
[0041] In this application, the initial tree structure formed by connecting nodes is obtained according to the interconnection planning information of the concentrated deployment area of optical terminal equipment.
[0042] S102, determine the number of optical cable connection directions corresponding to each node in the initial tree structure. When the number of optical cable connection directions of any node is greater than 3, split the node into multiple identical nodes so that the number of optical cable connection directions of each node is less than or equal to 3, thereby obtaining the target tree structure. The optical cable direction is determined by the two nodes connected by the optical cable.
[0043] Obtain the number of optical cable connection directions corresponding to each node in the initial tree structure, where the optical cable direction is determined by the two nodes connected to the optical cable. For example, each node can correspond to 1 optical cable direction, 2 optical cable directions, 3 optical cable directions, 4 optical cable directions, etc. If a node has 3 other nodes connected to it, then the node corresponds to 3 optical cable directions.
[0044] When the number of optical cable connection directions of any node is greater than 3, the node is split into multiple identical nodes so that the number of optical cable connection directions of each node is less than or equal to 3, thereby obtaining the target tree structure. Figure 2 This application illustrates a schematic diagram of node splitting, as shown below. Figure 2As shown, if the original path nodes are "A, B, C", and B has three branches "B, B1", "B, BA1", and "B, BB1", then for B, there are five directions: A, C, B1, BA1, and BB1. At this time, B is split into BF1, BF2, and BF3. Then the original path nodes become "A, BF1, BF2, BF3, C", and the branch paths become "BF1, B1", "BF2, BA1", and "BF3, BB1". In this way, the number of optical cable connection directions of each node is less than or equal to 3, thus obtaining the final target tree structure.
[0045] S103, determine the first and last nodes. For the other nodes besides the first and last nodes, combine the principle of connecting one node across another and the principle of connecting one branch across another to the next, and reduce the dimensionality of the target tree structure to a ring structure.
[0046] Once the first and last nodes are determined, for all other nodes, the target tree structure is reduced to a ring structure by combining the principles of connecting nodes one by one and connecting branches one by one, in order to avoid the occurrence of extremely long fiber optic paths.
[0047] Figure 3 This application illustrates a schematic diagram of an optical cable connection that does not span any nodes, as shown below. Figure 3 As shown, if the nodes on the path are "A, B, C, D", then the optical fibers will be connected in the order "A, B, C, D".
[0048] Figure 4 This application illustrates a schematic diagram of an optical cable connecting one node to another. Figure 4 As shown, if the nodes on the path are "A, B, C, D", then the first and last nodes are determined to be A and D respectively. For the other nodes besides the first and last nodes, the principle of connecting one node to another is followed. That is, the optical fibers are finally connected by connecting one device to another in the order of "A, C, D, B, A".
[0049] Figure 5 This application illustrates a schematic diagram of an optical cable connected across a branch node, as shown below. Figure 5 As shown, if there are branches "B, B1" and "C, C1" on the path "A, B, C, D", then the first and last nodes are determined to be A and D respectively. For the other nodes besides the first and last nodes, the principle of connecting the nodes across branches is followed, that is, the final fiber splicing order of the optical cable is "A, B1, C, D, C1, B, A" to connect the optical fibers in sequence.
[0050] S104. Determine the fiber connection strategy corresponding to each node according to the number of fiber optic cable directions of each node and whether there are optical terminal devices to be connected within each node, and perform fiber connection according to the fiber connection strategy to form a fiber optic ring network.
[0051] The specific method for determining the fiber connection strategy corresponding to each node according to the number of fiber optic cable directions of each node and whether there are optical terminal devices to be connected within each node is as follows:
[0052] Case 1: Take the nodes corresponding to 1 fiber optic cable direction and having no optical terminal devices to be connected within the node as the first nodes, and short-circuit fiber core 1 and fiber core N in the fiber optic cable of each first node, connect fiber core 2 and fiber core N - 1, until fiber core M and fiber core N - M + 1 are connected, where M < N / 2. Exemplarily, if the fiber optic cable has a total of 12 cores, then connect fiber core 1 and fiber core 12, connect fiber core 2 and fiber core 11, connect fiber core 3 and fiber core 10, connect fiber core 4 and fiber core 9, connect fiber core 5 and fiber core 8, connect fiber core 6 and fiber core 7.
[0053] Case 2: Take the nodes corresponding to 1 fiber optic cable direction and having optical terminal devices to be connected within the node as the second nodes, determine a target second node from all the second nodes, connect the first group of Rx of the target second node to fiber core 1, and connect the first group of T X to fiber core N, connect the second group of T X to fiber core 2, connect the second group of Rx to fiber core N - 1, connect the third group of Rx to fiber core 3, connect the third group of T X to fiber core N - 2, connect the fourth group of T X to fiber core 4, connect the fourth group of Rx to fiber core N - 3, and so on, until all groups of Rx and T X are connected to the corresponding fiber cores. Among them, the wire cores without Tx or Rx access also reserve the access conditions for subsequent Tx and Rx according to the above rules.
[0054] Figure 6 is a schematic diagram of the fiber optic cable connection of a second node with only two groups of T X and Rx shown in this application. As Figure 6 shown, nodes A, B1, C1, and D all correspond to 1 fiber optic cable direction. If there are optical terminal devices to be connected within nodes A, B1, C1, and D, then take nodes A, B1, C1, and D as the second nodes, determine a target second node from these 4 second nodes, and the target second node applies the fiber connection method of Case 2. Figure 6Taking node A as the target second node, and each optical cable having 4 fiber cores as an example, node A is suitable for the fiber connection method of Case Two, that is, the first group of Rx of node A is connected to fiber core 1, and the first group of T... X Connected to 4 fiber cores, the second group T X The first group of Rx is connected to fiber optic core 2, and the second group of Rx is connected to fiber optic core 3.
[0055] Figure 7 This application illustrates a method comprising multiple sets of T X A schematic diagram of the optical cable connection at the second node of Rx is shown below. Figure 7 As shown, nodes A, B1, C1, and D each correspond to one optical cable direction. If there are optical terminal devices that need to be connected among nodes A, B1, C1, and D, then nodes A, B1, C1, and D are designated as second nodes. A target second node is determined from these four second nodes. This target second node is applicable to the fiber optic connection method in scenario two. Figure 7 Taking node A as the target second node, and each optical cable having 12 fiber cores as an example, node A is suitable for the fiber connection method of scenario two, that is, connecting the first group of Rx at node A to fiber core 1, and the first group of T... X Connected to 12 fiber cores, the second group of T X The first group of Rx is connected to fiber 2 cores; the second group of Rx is connected to fiber 11 cores; the third group of Rx is connected to fiber 3 cores; and the third group of T... X Connected to 10 fiber cores, fourth group T X Connect the fourth group of Rx to the fourth fiber core, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
[0056] Scenario 3: Based on Scenario 2, all nodes other than the target second node are considered as remaining second nodes, and the first group T of each remaining second node is... X Connected to fiber 1 core, the first group of Rx is connected to fiber N core, the second group of Rx is connected to fiber 2 core, and the second group of T... X Connected to fiber N-1 core, third group T X The third Rx group is connected to fiber core 3, the fourth Rx group is connected to fiber core N-2, and the fourth T group is connected to fiber core 4. X Connect to fiber N-3 cores, and so on, until all groups of Rx and T are connected. X Connect to the corresponding fiber core. For cores without Tx or Rx connections, reserve conditions for future Tx or Rx connections according to the above rules.
[0057] All nodes other than the target second node are considered as the remaining second nodes, and so on. Figure 6For example, each optical cable has 4 fiber cores. Nodes A, B1, C1, and D each correspond to one optical cable direction. If there are optical terminal devices that need to be connected within nodes A, B1, C1, and D, then nodes A, B1, C1, and D are designated as second nodes. Node A is determined as the target second node, and nodes B1, C1, and D are designated as the remaining second nodes. Figure 6 As shown, nodes B1, C1, and D are all suitable for the fiber optic connection method in Case 3, that is, the first group T of each of nodes B1, C1, and D is connected. X Connected to fiber 1 core, the first group of Rx is connected to fiber 4 core, the second group of Rx is connected to fiber 2 core, and the second group of T... X Connected to 3 optical fiber cores.
[0058] Continue with Figure 7 For example, each optical cable has 12 fiber cores. Nodes A, B1, C1, and D each correspond to one optical cable direction. If there are optical terminal devices that need to be connected within nodes A, B1, C1, and D, then nodes A, B1, C1, and D are designated as second nodes. Node A is determined as the target second node, and nodes B1, C1, and D are designated as the remaining second nodes. Figure 7 As shown, nodes B1, C1, and D are all suitable for the fiber optic connection method in Case 3, that is, the first group T of each of nodes B1, C1, and D is connected. X Connected to fiber 1 core, the first group of Rx is connected to fiber 12 core, the second group of Rx is connected to fiber 2 core, and the second group of T... X Connected to 11 fiber cores, the third group T X The third Rx group is connected to the 3-core fiber, the fourth Rx group is connected to the 10-core fiber, and the fourth T group is connected to the 4-core fiber. X Connect to 9 fiber cores, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
[0059] Scenario 4: Take the node corresponding to the two optical cable directions and which does not have any optical terminal equipment that needs to be connected as the third node. Splice the fiber 1 core of the first optical cable direction to the fiber 1 core of the second optical cable direction at the third node, and splice the fiber 2 core of the first optical cable direction to the fiber 2 core of the second optical cable direction. Continue in this manner until the fiber cores of the first optical cable direction and the fiber 2 core of the second optical cable direction are spliced one by one.
[0060] The node corresponding to the two optical cable directions and which does not contain any optical terminal equipment that needs to be connected is designated as the third node. For example, if the optical cable has four fiber cores, the fiber 1 core in the first optical cable direction of the third node is fused with the fiber 1 core in the second optical cable direction, the fiber 2 core in the first optical cable direction is fused with the fiber 2 core in the second optical cable direction, the fiber 3 core in the first optical cable direction is fused with the fiber 3 core in the second optical cable direction, and the fiber 4 core in the first optical cable direction is fused with the fiber 4 core in the second optical cable direction.
[0061] Scenario 5: Nodes corresponding to two optical cable directions and containing optical terminal equipment requiring connection are designated as fourth nodes. It is then determined whether each fourth node is a cross-node (connecting across one node to another) or a branch-to-branch (connecting across one branch to another) cross-node ... X Connected, fiber 1 in the second optical cable direction is connected to the first group of Rx, fiber 2 in the first optical cable direction is connected to the second group of Rx, and fiber 2 in the second optical cable direction is connected to the second group of T. X Connect them, and so on, until the N / 2 core of the first optical cable direction is connected to the N / 2 group of Rx, and the N / 2 core of the second optical cable direction is connected to the N / 2 group of T. X Connect them, and fuse the remaining fiber cores N / 2+1 to fiber core N in the first and second optical cable directions one by one. For cores without Tx or Rx connections, reserve conditions for subsequent Tx and Rx connections according to the above rules.
[0062] Figure 8 This application illustrates a schematic diagram of a non-crossing optical cable connection in a fourth node, as shown below. Figure 8 As shown, if node B is a non-crossing node in the fourth node group, taking a 12-fiber core per optical cable as an example, the connection between node A and node B is taken as the first optical cable direction, and the connection between node B and node C is taken as the second optical cable direction. Then, the fiber core 1 in the first optical cable direction of node B is connected to the first group T. X Connected, fiber 1 in the second optical cable direction is connected to the first group of Rx, fiber 2 in the first optical cable direction is connected to the second group of Rx, and fiber 2 in the second optical cable direction is connected to the second group of T. X Connect them, and so on, until the connection between the 6 fiber cores in the first optical cable direction and the 6th group of Rx is completed, and the connection between the 6 fiber cores in the second optical cable direction and the 6th group of T is completed. X Connect them, and fuse the remaining 7 to 12 optical fibers in the first and second optical cable directions one by one.
[0063] Scenario 6: Based on Scenario 5, if the fourth node is a cross-node, then splice the fiber cores 1 through N / 2 in the first and second optical cable directions of the fourth node one-to-one, and connect the remaining fiber N cores in the first optical cable direction to the first group of Rx, and the fiber N cores in the second optical cable direction to the first group of T. X Connected, the N-1 core of the first optical fiber in the first optical cable direction is connected to the second group T X Connect the fiber N-1 core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the fourth node are connected.
[0064] Figure 9 This application illustrates a schematic diagram of an optical cable connection spanning a fourth node, as shown below. Figure 9 As shown, if node C is a crossover node in the fourth node group, taking a 12-fiber core per optical cable as an example, the connection between node B and node C is taken as the first optical cable direction, and the connection between node C and node D is taken as the second optical cable direction. Then, fiber cores 1 to 6 in the first and second optical cable directions of node C are spliced one-to-one, and the remaining 12 fiber cores in the first optical cable direction are connected to the first group Rx, and the remaining 12 fiber cores in the second optical cable direction are connected to the first group T. X Connected, the 11 cores of the first optical cable are connected to the second group T. X Connect the 11 cores of the second optical fiber in the second optical cable direction to the second group of Rx, and so on, until all the remaining optical fiber cores of node C are connected.
[0065] Scenario 7: The node corresponding to the three optical cable directions and which does not contain any optical terminal equipment that needs to be connected is designated as the fifth node. Then, fiber cores 1 to N / 2 in the first and third optical cable directions of the fifth node are spliced one by one. Fiber cores N / 2+1 to N in the first and second optical cable directions are spliced one by one. Fiber core 1 in the second optical cable direction is connected to fiber core N in the third optical cable direction. Fiber core 2 in the second optical cable direction is connected to fiber core N-1 in the third optical cable direction. This process continues until all remaining fiber cores of the fifth node are connected.
[0066] For example, taking a fiber cable with 12 fiber cores as an example, the fiber cores 1 to 6 in the first and third fiber cable directions of the fifth node are spliced one-to-one. The fiber cores 7 to 12 in the first and second fiber cable directions are spliced one-to-one. The fiber core 1 in the second fiber cable direction is connected to the fiber core 12 in the third fiber cable direction. The fiber core 2 in the second fiber cable direction is connected to the fiber core 11 in the third fiber cable direction. The fiber core 3 in the second fiber cable direction is connected to the fiber core 10 in the third fiber cable direction. The fiber core 4 in the second fiber cable direction is connected to the fiber core 9 in the third fiber cable direction. The fiber core 5 in the second fiber cable direction is connected to the fiber core 8 in the third fiber cable direction. The fiber core 6 in the second fiber cable direction is connected to the fiber core 7 in the third fiber cable direction. In this way, all the fiber cores of the fifth node are connected.
[0067] Scenario 8: The node corresponding to the three optical cable directions and containing the optical terminal equipment that needs to be connected is designated as the sixth node. For the sixth node, fiber cores 1 through N / 2 in the first and third optical cable directions are spliced one-to-one. Fiber core 1 in the second optical cable direction is connected to fiber core N in the third optical cable direction, fiber core 2 in the second optical cable direction is connected to fiber core N-1 in the third optical cable direction, and so on, until fiber core N / 2 in the second optical cable direction is connected to fiber core N / 2+1 in the third optical cable direction. Finally, fiber core N in the first optical cable direction is connected to the first group of Rx, and fiber core N in the second optical cable direction is connected to the first group of T. X Connected, the N-1 core of the first optical fiber in the first optical cable direction is connected to the second group T X Connect the fiber N-1 core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the sixth node are connected.
[0068] Continue with Figure 7 For example, node B corresponds to three optical cable directions. If there are optical terminal devices that need to be connected within node B, then node B is designated as the sixth node. The connection between node A and node B is designated as the first optical cable direction, the connection between node B and node C is designated as the second optical cable direction, and the connection between node B and node B1 is designated as the third optical cable direction. Then, fiber cores 1 through 6 of the first and third optical cable directions at node B are spliced one-to-one. Fiber core 1 of the second optical cable direction is connected to fiber core 12 of the third optical cable direction, fiber core 2 of the second optical cable direction is connected to fiber core 11 of the third optical cable direction, and so on, until fiber core 6 of the second optical cable direction is connected to fiber core 7 of the third optical cable direction. Finally, fiber core 12 of the first optical cable direction is connected to the first group of Rx, and fiber core 12 of the second optical cable direction is connected to the first group of T. X Connected, the 11 cores of the first optical cable are connected to the second group T. XConnect the 11 cores of the second optical fiber in the second optical cable direction to the second group of Rx, and so on, until all the remaining optical fiber cores of node B are connected.
[0069] This application uses a tree structure to describe the optical cable connection topology of multiple optical terminal equipment concentrated in an area. In order to ensure that the distance between each node is as uniform as possible, the tree structure is described as a ring network structure by adopting the principle of "spanning one after another". Then, according to the connection order of the tree structure and the ring network structure, a templated connection method is used for each node to quickly determine the fiber splicing scheme for each concentrated area of optical terminal equipment, thus ensuring the consistency and reliability of the fiber splicing scheme.
[0070] Furthermore, the above embodiments are exemplary and should not be construed as limiting this application. In this application, the adjustment of the order of optical cable cores, the order or number of groups of Rx and Tx of the connected optical fiber cores to form a ring network are also used as the optical fiber connection strategy.
[0071] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0074] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A fiber optic ring network topology method, characterized in that, include: The area where the optical terminal equipment to be connected is concentrated is taken as a node, and the initial tree structure formed by connecting the nodes is obtained according to the connection planning information of the area where the optical terminal equipment is concentrated. Determine the number of optical cable directions corresponding to each node in the initial tree structure. When the number of optical cable directions of any node is greater than 3, split the node into multiple identical nodes so that the number of optical cable directions of each node is less than or equal to 3, thereby obtaining the target tree structure. The optical cable direction is determined by the two nodes connected by the optical cable. Once the first and last nodes are determined, for all other nodes besides the first and last nodes, the target tree structure is reduced to a ring structure by combining the principles of connecting one node across another and connecting one branch across another. Based on the number of optical cable directions at each node and whether there are optical terminal devices that need to be connected within each node, the corresponding optical fiber connection strategy for that node is determined, and optical fiber connections are made according to the optical fiber connection strategy to form an optical fiber ring network.
2. The fiber optic ring network method according to claim 1, characterized in that, The optical cable comprises N optical fiber cores, where N is an even number greater than zero, and the node contains less than or equal to N / 2 sets of receiver ports Rx and transmitter ports T. X .
3. The fiber optic ring network method according to claim 2, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node includes: The node corresponding to one optical cable direction and having no optical terminal equipment to be connected within it is designated as the first node. In each of these first nodes, fiber 1 core is short-circuited to fiber N core, fiber 2 core is connected to fiber N-1 core, and so on, until fiber M core is connected to fiber N-M+1 core. Where M... <N / 2。 4. The fiber optic ring network method according to claim 2 or 3, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node also includes: A node corresponding to one optical cable direction and containing an optical terminal device that needs to be connected is designated as a second node. From all the second nodes, a target second node is determined. The first group of Rx of the target second node is connected to fiber 1 core. The first group of T... X Connected to the N core of the optical fiber, the second group T X The first group of Rx is connected to fiber 2 core, the second group of Rx is connected to fiber N-1 core, the third group of Rx is connected to fiber 3 core, and the third group of T... X Connected to fiber N-2 core, fourth group T X Connect the fourth group of Rx to the fourth fiber core, and connect the fourth group of Rx to the N-3 fiber core, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
5. The fiber optic ring network method according to claim 4, characterized in that, After determining a target second node from all the second nodes, the process further includes: All nodes in the second node group other than the target second node are considered as remaining second nodes, and the first group T of each of the remaining second nodes is... X Connected to fiber 1 core, the first group of Rx is connected to fiber N core, the second group of Rx is connected to fiber 2 core, and the second group of T... X Connected to fiber N-1 core, third group T X The third Rx group is connected to fiber core 3, the fourth Rx group is connected to fiber core N-2, and the fourth T group is connected to fiber core 4. X Connect to fiber N-3 cores, and so on, until all groups of Rx and T are connected. X Connect it to the corresponding fiber core.
6. The fiber optic ring network method according to claim 5, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node also includes: The node corresponding to the two optical cable directions and having no optical terminal equipment that needs to be connected is designated as the third node. The fiber 1 core of the first optical cable direction of the third node is spliced with the fiber 1 core of the second optical cable direction, and the fiber 2 core of the first optical cable direction is spliced with the fiber 2 core of the second optical cable direction. This process is repeated until the fiber cores of the first and second optical cable directions are spliced one by one.
7. The fiber optic ring network method according to claim 6, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node includes: The node corresponding to the two optical cable directions and containing the optical terminal equipment that needs to be connected is taken as the fourth node. It is determined whether each of the fourth nodes is a node that crosses a node and is connected to a node across a node and a branch across a branch. In response to the fourth node being a non-crossing node, the fiber 1 core of the fourth node in the first optical cable direction is connected to the first group T. X Connected, fiber 1 in the second optical cable direction is connected to the first group of Rx, fiber 2 in the first optical cable direction is connected to the second group of Rx, and fiber 2 in the second optical cable direction is connected to the second group of T. X Connect them, and so on, until the N / 2 core of the first optical cable direction is connected to the N / 2 group of Rx, and the N / 2 core of the second optical cable direction is connected to the N / 2 group of T. X Connect them, and fuse the remaining fiber N / 2+1 cores to fiber N cores in the first and second optical cable directions one by one.
8. The fiber optic ring network method according to claim 7, characterized in that, The method further includes: In response to the fourth node being a cross-node, fiber cores 1 through N / 2 in the first and second optical cable directions of the fourth node are spliced one-to-one, and the remaining fiber core N in the first optical cable direction is connected to the first group Rx, and the fiber core N in the second optical cable direction is connected to the first group T. X Connected, the N-1 core of the first optical fiber in the first optical cable direction is connected to the second group T X Connect the fiber N-1 core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the fourth node are connected.
9. The fiber optic ring network method according to claim 8, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node also includes: The node corresponding to the three optical cable directions and without any optical terminal equipment to be connected is designated as the fifth node. Then, fiber cores 1 to N / 2 in the first and third optical cable directions of the fifth node are spliced one by one. Fiber cores N / 2+1 to N in the first and second optical cable directions are spliced one by one. Fiber core 1 in the second optical cable direction is connected to fiber core N in the third optical cable direction. Fiber core 2 in the second optical cable direction is connected to fiber core N-1 in the third optical cable direction. This process continues until all remaining fiber cores of the fifth node are connected.
10. The fiber optic ring network method according to claim 9, characterized in that, The step of determining the fiber optic connection strategy corresponding to a node based on the number of optical cable directions at each node and whether there are any optical terminal devices that need to be connected within each node also includes: The node corresponding to the three optical cable directions and containing the optical terminal equipment that needs to be connected is designated as the sixth node. Then, fiber cores 1 through N / 2 in the first and third optical cable directions of the sixth node are spliced one-to-one. Fiber core 1 in the second optical cable direction is connected to fiber core N in the third optical cable direction, fiber core 2 in the second optical cable direction is connected to fiber core N-1 in the third optical cable direction, and so on, until fiber core N / 2 in the second optical cable direction is connected to fiber core N / 2+1 in the third optical cable direction. Finally, fiber core N in the first optical cable direction is connected to the first group of Rx, and fiber core N in the second optical cable direction is connected to the first group of T. X Connected, the N-1 core of the first optical fiber in the first optical cable direction is connected to the second group T X Connect the fiber N-1 core in the second optical cable direction to the second group of Rx, and so on, until all the remaining fiber cores of the sixth node are connected.