Optical fiber network structure design system and networking method for high-speed rail station

Abstract

The invention relates to the field of mobile communication networking, in particular to an optical fiber network structure design system for a high-speed railway station, which comprises a data acquisition module used for acquiring data transmission requirements of the high-speed railway station and access point information of a backbone hierarchical network, a convergence hierarchical network and an access layer network in an optical fiber network; the link design module is used for generating an effective data link according to a data transmission requirement, and designing access point positions of an access hierarchy network and a convergence hierarchy network of the effective data link and / or access point positions of the convergence hierarchy network and a backbone hierarchy network; and the visualization module is used for visualizing the link design result of the link design module. According to the optical fiber network structure design and optimization method based on data driving, the optimal optical fiber link design considering the optical fiber distance and the link load constraint is achieved, the efficiency and precision of high-speed railway station optical fiber network planning are improved, and assistance is provided for reducing the later operation and maintenance cost.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication networking, and particularly to a fiber optic network structure design system and networking method for high-speed railway stations. Background Art

[0002] With the rapid development of the high-speed railway network, the bandwidth requirements of various business systems inside the station (such as passenger ticketing, video surveillance, train dispatching and command, station Wi-Fi, etc.) carried by optical fibers are continuously increasing. In order to meet the access requirements of these multi-service, low-latency, and large-bandwidth, most high-speed railway stations adopt a hierarchical optical fiber network architecture: the bottom layer is the access layer network for direct communication with terminal devices; the middle is the aggregation layer network responsible for aggregating the traffic of each access layer; the top layer is the backbone layer network responsible for the large-capacity transmission between the inside of the station and the intercity network. Summary of the Invention

[0003] The present invention provides a fiber optic network structure design system and networking method for high-speed railway stations, aiming to provide a data-driven fiber optic network structure design and optimization method to achieve the optimal fiber optic link design considering both fiber optic distance and link load constraints, so as to improve the efficiency and accuracy of the fiber optic network planning for high-speed railway stations and contribute to reducing the later operation and maintenance costs.

[0004] The fiber optic network structure design system for high-speed railway stations provided by the present invention includes:

[0005] A data acquisition module for obtaining the data transmission requirements of the high-speed railway station and the access point information of the backbone layer network, aggregation layer network, and access layer network in the fiber optic network;

[0006] A link design module for generating effective data links according to the data transmission requirements and designing the access point positions of the access layer network and the aggregation layer network and / or the access point positions of the aggregation layer network and the backbone layer network of the effective data links;

[0007] A visualization module for visualizing the link design results of the link design module.

[0008] In some embodiments, the data acquisition module includes a plurality of data acquisition sub-modules, and the plurality of data acquisition sub-modules respectively correspond to a plurality of functional sub-regions in the high-speed railway area and are respectively used for acquiring the data transmission requirements in the corresponding functional sub-regions.

[0009] In some embodiments, the data in any one of the effective data links is accessed to the network by a first access device of the access layer network and transmitted to an access device of the backbone layer network or a second access device of the access layer network through at least two access devices of the aggregation layer network, and the first access device and the second access device are not the same access device.

[0010] In some embodiments, the access point information of the backbone layer network, the aggregation layer network, and the access layer network in the optical fiber network includes:

[0011] The spatial location of each access device in the backbone layer network, the spatial location of each access device in the aggregation layer network, the spatial location of each access device in the access layer network, and further includes:

[0012] The optical fiber data transmission distance between any access device in the access layer network and any access device in the backbone layer network, the optical fiber data transmission distance between any two access devices in the aggregation layer network, the optical fiber data transmission distance between any access device in the aggregation layer network and any access device in the backbone layer network.

[0013] In some embodiments, for the path of any valid data link, the link design module designs it through the following steps: including the following steps:

[0014] According to the data transmission requirements of the valid data link, respectively obtain the spatial location of the first access device and the spatial location of the second access device or the access device in the backbone layer network;

[0015] Set the optical fiber transmission distance threshold between the two access devices, starting from the first access device and ending with the corresponding second access device or the access device in the corresponding backbone layer network, and generate several candidate paths, and the optical fiber data transmission distance between any two access devices in any candidate path is less than the distance threshold.

[0016] In some embodiments, for the data transmission requirements of any valid data link, the link design module generates at most K candidate paths, where K is a positive integer:

[0017] The total length of the first candidate path among the K candidate paths is the shortest path;

[0018] The total length of the k-th candidate path among the K candidate paths is greater than or equal to the total length of the (k - 1)-th candidate path, where k is a positive integer less than or equal to K.

[0019] In some embodiments, the link design module is further configured to screen out the optimal candidate path from the K candidate link paths according to the load conditions of each access device.

[0020] In some embodiments, according to the load conditions of each access device, the link design module screens out the optimal path from the K candidate paths through the following steps:

[0021] Set constraint conditions, and based on the constraint conditions, solve the optimal path objective function to obtain the optimal link path corresponding to each valid data link.

[0022] In some embodiments, the following constraint conditions are set in the link design module:

[0023] The first constraint condition: For any valid data link, a unique optimal path is generated correspondingly;

[0024] The second constraint condition: In any optimal path, the bandwidth requirement for each access device does not exceed the remaining available bandwidth of the corresponding access device.

[0025] Based on the fiber optic network structure design system for high-speed railway stations provided by the present invention, the present invention also provides a networking method for implementing the fiber optic network deployment of high-speed railway stations, which specifically includes the following steps:

[0026] Utilize the fiber optic network structure design system for high-speed railway stations provided in the above embodiments to generate the link design result of the fiber optic network of the high-speed railway station;

[0027] According to the link design result, successively match the corresponding access devices between the access layer network and the aggregation layer network, and between the aggregation layer network and the backbone layer network, and lay the corresponding fiber optic links. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the fiber optic network structure design system for high-speed railway stations provided by the embodiments of the present invention;

[0029] Figure 2 It is a flowchart of the fiber optic network structure design for high-speed railway stations provided by the embodiments of the present invention. Detailed Embodiments

[0030] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented to thoroughly understand the embodiments of the present application.

[0031] In the description of the present application, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application; terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] It should be noted that the fiber optic network structure design system provided by the present invention relies on the physical facility layouts such as computer rooms, cable trays, pipelines, and cabinets that have been completed during the initial construction of high-speed railway stations (i.e., the "physical topology floor") and does not rearrange these facilities.

[0033] Further, on the established base plate, for the spatial positions and bandwidth capacities of each access point, the present invention realizes an optimal connection scheme at the logical level through an intelligent algorithm. Thus, without increasing the cost of additional civil engineering or pipeline construction, a fiber laying design that takes into account both the shortest fiber distance and link load balance can be quickly generated, ensuring that the network planning is both efficient and economical.

[0034] In this embodiment, please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a fiber optic network structure design system for high-speed railway stations provided by an embodiment of the present invention; as Figure 1 shown, the fiber optic network structure design system for high-speed railway stations provided by the present invention includes a data acquisition module, a link design module, and a visualization module. The data acquisition module is signal-connected to the link design module, and the link design module is connected to the visualization module.

[0035] Further, in this embodiment, the data acquisition module is used to obtain the data transmission requirements of the high-speed railway station and the access point information of the backbone network, aggregation network, and access network in the fiber optic network; the link design module is used to generate an effective data link according to the data transmission requirements, and design the access point positions of the access network and aggregation network of the effective data link and / or the access point positions of the aggregation network and backbone network; the visualization module is used to visualize the link design result of the link design module.

[0036] To implement the fiber optic network structure design of the high-speed railway station, an embodiment of the present invention also provides a fiber optic network structure design method for the high-speed railway station.

[0037] Please refer to Figure 2 , Figure 2 which is a flowchart of the fiber optic network structure design method for high-speed railway stations provided by an embodiment of the present invention; as Figure 2 shown, the fiber optic network structure design method for high-speed railway stations provided by the present invention includes the following steps:

[0038] S01. The data acquisition module obtains the data transmission requirements of the high-speed railway station and the access point information of the backbone network, aggregation network, and access network in the fiber optic network.

[0039] Further, the data transmission requirements described in the present invention refer to the point-to-point data interaction bandwidth requirements generated between any two execution devices to ensure the normal operation of various real-time services such as passenger ticket sales and checking, video surveillance, train dispatching and command, station Wi-Fi coverage, and luggage monitoring transmission system in the high-speed railway station; specifically, any data transmission requirement obtained by the present invention includes the identifiers of the source device and the target device, and the data interaction bandwidth requirement between the two.

[0040] Further, the access point information of each network layer in the present invention is a set of static and dynamic attributes of each level of network nodes in the optical fiber network required for the support link design module to perform path planning, such as the basic attributes of the node itself (such as the ID information of access switches, aggregation switches, backbone routers, ODF distribution frames, etc.), spatial location information (such as three-dimensional coordinate information based on the same spatial coordinates), and capacity attributes (such as the maximum optical fiber aggregation bandwidth that the entire device can carry).

[0041] In this embodiment, the access point information of the backbone layer network, aggregation layer network, and access layer network in the optical fiber network includes: the spatial location of each access device in the backbone layer network, the spatial location of each access device in the aggregation layer network, and the spatial location of each access device in the access layer network.

[0042] Further, in this embodiment, the access point information further includes: the optical fiber data transmission distance between any access device in the access layer network and any access device in the backbone layer network, the optical fiber data transmission distance between any two access devices in the aggregation layer network, and the optical fiber data transmission distance between any access device in the aggregation layer network and any access device in the backbone layer network.

[0043] It can be understood that although the interior of a high-speed railway station has a large space and complex functions, the terminal devices (ticket vending and checking machines, cameras, baggage sorting equipment, etc.) in each area are usually distributed in fixed functional areas; however, the business types and peak and valley traffic periods in different functional areas vary greatly: for example, the traffic volume in the ticket vending and checking area surges during peak commuting hours, and the Wi-Fi in the waiting hall rises when the train arrives and stops.

[0044] Therefore, in order to achieve granular load prediction and capacity planning, in some embodiments, the data acquisition module is set as a number of data acquisition sub-modules, and the number of data acquisition sub-modules respectively corresponds to a number of functional sub-areas in the high-speed railway area, and are respectively used to collect the data transmission requirements in the corresponding functional sub-areas.

[0045] Furthermore, within each functional sub-area, the data acquisition sub-module monitors the point-to-point bandwidth requirements of all services at regular time intervals (for example, every minute), and records the values at each monitoring moment; and after completing a statistical cycle, the maximum value of the bandwidth requirements at all monitoring moments in this area is taken as the design bandwidth requirement of this area to ensure that the network can meet the service requirements even during the busiest period.

[0046] S02. The link design module generates an effective data link according to the data transmission requirements, and designs the access point locations of the access layer network and the aggregation layer network and / or the access point locations of the aggregation layer network and the backbone layer network of the effective data link.

[0047] Further, to optimize the layout of the fiber optic network structure, the present invention only optimizes the transmission paths that may be redundant, thereby significantly reducing the recalculation scope and computational overhead while ensuring that the network reliability and protection mechanism remain unchanged, and realizing the adjustment of the fiber optic network structure layout in an "incremental optimization" manner.

[0048] Specifically, in this embodiment, the data in any of the effective data links is accessed to the network by a first access device in the access layer network and transmitted to an access device in a backbone layer network or a second access device in the access layer network via at least two aggregation layer network access devices, and the first access device and the second access device are not the same access device.

[0049] It can be understood that the "effective data link" described in the present invention is a multi-level relay link. Since there are usually multiple adjacent switches deployed in the aggregation layer inside the station, and they are often interconnected through multiple fiber optic loops or backup links, there may be optional physical path redundancy in various relay combinations such as "Access-1 → Aggregation A → Aggregation B → Access-2", "Access-1 → Aggregation B → Aggregation C → Core", or "Access-2 → Aggregation A → Aggregation C → Core".

[0050] Further, in this embodiment, for the path of any effective data link, the link design module designs it through the following steps: including the following steps:

[0051] S021. According to the data transmission requirements of the effective data link, respectively obtain the spatial positions of the first access device, and the spatial positions of the second access device or the access device in the backbone layer network.

[0052] S022. Set a fiber optic transmission distance threshold between the two access devices, starting from the first access device and ending with the corresponding second access device or the access device in the corresponding backbone layer network, and generate several candidate paths, and the fiber optic data transmission distance between any two access devices in any candidate path is less than the distance threshold.

[0053] It should be noted that the fiber optic transmission distance threshold between the two access devices described in the present invention refers to the maximum allowable distance limit used to determine whether two network nodes can be directly connected by a single section of fiber optic in link design.

[0054] Furthermore, the fiber optic transmission distance threshold between any two access devices can be allowed to be set through the management interface or configuration file according to the on-site fiber optic laying environment and equipment selection to meet the requirements of different scale stations or different technical solutions.

[0055] It can be understood that the several candidate paths obtained in step S022 refer to the feasible routing paths screened from the source device to the target device for each service requirement in the link design module, and the optical fiber data transmission distance between any two access devices in each routing path is less than the distance threshold.

[0056] Furthermore, to screen out the optimal path from several candidate paths, step S022 further includes the following steps: setting constraint conditions, and based on the constraint conditions, solving the optimal path objective function to obtain the optimal link path corresponding to each valid data link.

[0057] It can be understood that once the number of network nodes (i.e., the access devices of different hierarchical networks in the present invention) reaches several hundred or several thousand, all possible simple path combinations grow explosively; therefore, to avoid computational waste and improve computational efficiency, the link design module generates at most K candidate paths, where K is a positive integer: the total length of the first candidate path among the K candidate paths is the shortest path; the total length of the k-th candidate path among the K candidate paths is greater than or equal to the total length of the (k - 1)-th candidate path, and k is a positive integer less than or equal to K.

[0058] Specifically, the K candidate paths from the source device to the target device can be obtained through the following steps: S0221. Use the single-source shortest path algorithm to calculate the first shortest simple path between the source device and the target device. It can be understood that this path is the first candidate path.

[0059] S0222. For each determined shortest path, generate new candidate paths by cutting at each point in the path and re-searching for branch paths.

[0060] Specifically, the selected path is split into a "root path segment" and "branch points" in the order of nodes; for each possible branch point, retain the root path segment before the branch point, and without reusing the nodes and selected edges that the root path has passed through, initiate a shortest path search from this branch point to obtain a new branch path; splice the root path segment and the new branch segment to form a complete candidate path.

[0061] S0223. After generating several new paths through each branch point each time, sort them according to the total distance, and sequentially select the shortest ones as the 2nd, 3rd,... until the predetermined K-th path is obtained.

[0062] It can be understood that K can be comprehensively considered according to factors such as station scale, number of requirements, and load fluctuations. In most scenarios, K = 3 to 5 to quickly solve within an acceptable scale.

[0063] In this embodiment, the optimal path objective function satisfies the following formula: Among them, s and t represent the source device ID and target device ID of a service requirement. represents the path total length of represents the k-th candidate path for the service requirement (s, t), D i,j represents the optical fiber data transmission distance between access device i and access device j. is a binary decision variable, which takes the value of 1 when the k-th candidate path is selected, otherwise 0. α is the load balancing weight, with a value ranging from 0.3 to 0.7, C ij is the rated capacity of the link between access device i and access device j, b s,t represents the required bandwidth of the service requirement (s, t).

[0064] Based on the above objective function, the following constraint conditions are set in the link design module:

[0065] The first constraint condition: For any valid data link, a unique optimal path is generated. The first constraint condition ensures the uniqueness of the path design.

[0066] The second constraint condition: In any optimal path, the bandwidth requirement for each access device does not exceed the remaining available bandwidth of the corresponding access device; the second constraint condition locks the safety boundary of the design from the perspective of hardware capabilities, avoiding any device from being overloaded due to new links and ensuring the long-term stability of network operation.

[0067] S03. The visualization module is used to visualize the link design result of the link design module.

[0068] In this embodiment, the visualization module graphically presents the link design result output by the link design module, which helps planners intuitively view and analyze the network topology, link length, and load distribution.

[0069] Specifically, its output content includes but is not limited to: According to the spatial coordinates of each access device in the link design result, project all access layer, aggregation layer, and backbone layer devices onto a plane or three-dimensional scene according to their actual or relative positions; Connect the selected links of each "source device → target device" in sequence in a directed or undirected connection manner according to the service link path; Mark the total optical fiber length (meters or kilometers) and the total service bandwidth carried (Gbps) for each link.

[0070] Based on the fiber optic network structure design system for high-speed railway stations provided by the present invention, the present invention also provides a networking method for implementing the fiber optic network deployment of high-speed railway stations, which specifically includes the following steps:

[0071] Using the fiber optic network structure design system for high-speed railway stations provided by the above embodiments, generate the link design results of the fiber optic network for high-speed railway stations; according to the link design results, successively match the corresponding access devices between the access-level network and the aggregation-level network, and between the aggregation-level network and the backbone-level network, and lay the corresponding fiber optic links.

[0072] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailedly described or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred implementation manners of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An optical fiber network structure design system for high-speed railway stations, characterized in that, Including: A data acquisition module, configured to obtain the data transmission requirements of a high-speed rail station and the access point information of the backbone-level network, aggregation-level network, and access-level network in the optical fiber network; A link design module, configured to generate an effective data link according to the data transmission requirements, and design the access point positions of the access-level network and the aggregation-level network and / or the access point positions of the aggregation-level network and the backbone-level network of the effective data link; A visualization module, configured to visualize the link design result of the link design module.

2. The fiber optic network structure design system for high-speed railway stations according to claim 1, characterized in that The data acquisition module includes a plurality of data acquisition sub-modules, and the plurality of data acquisition sub-modules respectively correspond to a plurality of functional sub-regions in the high-speed rail area, and are respectively configured to acquire the data transmission requirements in the corresponding functional sub-regions.

3. The fiber optic network structure design system for high-speed railway stations according to claim 1, wherein The data in any one of the effective data links is accessed to the network by a first access device of the access-level network, and is transmitted to an access device of the backbone-level network or a second access device of the access-level network via at least two access devices of the aggregation-level network, and the first access device and the second access device are not the same access device.

4. The fiber optic network structure design system for high-speed railway stations according to claim 1, characterized in that, The access point information of the backbone-level network, aggregation-level network, and access-level network in the optical fiber network includes: The spatial positions of each access device in the backbone-level network, the spatial positions of each access device in the aggregation-level network, the spatial positions of each access device in the access-level network, and further includes: The optical fiber data transmission distance between any access device in the access-level network and any access device in the backbone-level network, the optical fiber data transmission distance between any two access devices in the aggregation-level network, the optical fiber data transmission distance between any access device in the aggregation-level network and any access device in the backbone-level network.

5. The fiber optic network structure design system for high-speed railway stations according to claim 4, characterized in that, The path of any effective data link, the link design module designs through the following steps: including the following steps: According to the data transmission requirements of the effective data link, respectively obtain the spatial position of the first access device, and the spatial position of the second access device or the access device in the backbone-level network; Set a threshold value for the optical fiber transmission distance between two access devices, starting from the first access device, and ending with the corresponding second access device or the access device in the corresponding backbone-level network, to generate a plurality of candidate paths, and the optical fiber data transmission distance between any two access devices in any candidate path is less than the distance threshold.

6. The fiber optic network structure design system for high-speed railway stations according to claim 5, characterized in that, For the data transmission requirements of any effective data link, the link design module generates at most K candidate paths, and K is a positive integer: The total length of the first candidate path among the K candidate paths is the shortest path; The total length of the k-th candidate path among the K candidate paths is greater than or equal to the total length of the (k - 1)-th candidate path, and k is a positive integer less than or equal to K.

7. The fiber optic network structure design system for high-speed railway stations according to claim 6, characterized in that, The link design module is further configured to screen out the optimal candidate path from the K candidate link paths according to the load conditions of each access device.

8. The fiber optic network structure design system for high-speed railway stations according to claim 7, characterized in that According to the load conditions of each access device, the link design module screens out the optimal path from the K candidate paths through the following steps: Set constraint conditions, and solve the optimal path objective function based on the constraint conditions to obtain the optimal link path corresponding to each valid data link.

9. The fiber optic network structure design system for high-speed railway stations according to claim 8, characterized in that The following constraint conditions are set in the link design module: The first constraint condition: For any valid data link, a unique optimal path is generated correspondingly. The second constraint condition: In any optimal path, the bandwidth requirement for each access device does not exceed the remaining available bandwidth of the corresponding access device.

10. A networking method, characterized in that, It includes the following steps: Use the optical fiber network structure design system for high-speed railway stations according to any one of claims 1-9 to generate the link design result of the optical fiber network of the high-speed railway station; According to the link design result, correspondingly match the access devices between the access-level network and the aggregation-level network, and between the aggregation-level network and the backbone-level network in sequence, and lay the corresponding optical fiber links.

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