An improved optical distribution network backbone cable architecture

Abstract

The application provides an improved optical distribution network backbone cable architecture method, comprising the following steps: step 1, setting a convergence machine room, a grid and a main distribution point; step 2, measuring and calculating the core requirement in the grid; step 3, formulating a main distribution point fusion core distribution scheme; step 4, deploying the backbone cable, core termination and connection. The application improves the rationality of the main distribution point setting, improves the utilization rate of the backbone cable core, reduces the related optical transmission channel fiber jump points, optimizes the planning, construction and use of the optical distribution network, serves 5G / FG, 6G / F6G and creates a more applicable underlying physical network.

Description

Technical Field

[0001] This invention belongs to the field of wired communication, and particularly relates to an improved method for the backbone optical cable architecture of an optical distribution network. Background Technology

[0002] ODN (Optical Distribution Network) originally referred to an optical cable network based on PON (Passive Optical Network) technology, which provides an optical transmission line channel between OLT (Optical Line Terminal) and ONU (Optical Network Unit).

[0003] With technological advancements, ODN has gradually decoupled from PON technology, evolving into the foundation for integrated wired and wireless access. It supports the interconnection of HUBs (hubs) and CPEs (Customer Premise Equipment) in various distributed systems, including PON and Centralized RAN (wireless backhaul network), as well as networking with wired transmission access layer equipment.

[0004] ODN includes various elements such as aggregation equipment room, main distribution point, backbone optical cable, auxiliary distribution point, distribution optical cable, tie optical cable, and drop optical cable, and can be divided into three levels: backbone access, distribution access, and drop.

[0005] The backbone access layer consists of aggregation rooms, main distribution points, and backbone optical cables. Currently, a top-down ring architecture approach is commonly used, which involves first setting up aggregation rooms and main distribution points, then deploying backbone optical cables around the aggregation rooms, and distributing fiber cores at the main distribution points.

[0006] like Figure 1 The diagram shows a schematic of the ODN backbone optical cable ring architecture. At the main distribution point, the fiber cores of the backbone optical cable are divided into three types: dedicated, shared, and reserved. These three types of fiber cores are relatively independent of each other within the optical cable.

[0007] (1) Dedicated fiber cores are focused on specific main distribution points, providing direct east-west access to the aggregation room. Objectively, there is one short path and one long path in the east-west direction. This is primarily used for the connection between distributed system HUBs and CPEs;

[0008] (2) The key feature of shared fiber cores is coverage on the opposite side, with direct access to adjacent main distribution points (the first and last main distribution points and the adjacent aggregation equipment room). It is mainly used for networking wired transmission access layer equipment;

[0009] (3) The reserved fiber core is not at the main distribution point. It starts from the aggregation room and returns to the aggregation room, serving as the main distribution point to add redundancy by exclusive or shared fiber cores.

[0010] Since optical cables and optical cable termination devices are bundled or united in 12 cores, dedicated, shared, and reserved fiber cores are all in units of 12 cores.

[0011] The traditional ring architecture approach has four main drawbacks:

[0012] (1) In the era of 5G / F5G (fifth-generation mobile / fixed-line communication technology) and the not-too-distant future 6G / F6G (sixth-generation mobile / fixed-line communication technology), the trend of centralized and cloud-based equipment deployment is obvious. The dedicated fiber cores of the trunk optical cable are divided into short-path and long-path directions, each accounting for 50% of the total. Under the centralized and cloud-based architecture, when using HUB and CPE, the fiber cores suitable for the short-path direction have low attenuation, low latency, and good quality, while the fiber cores suitable for the long-path direction have high attenuation, high latency, and poor quality, resulting in low actual utilization of the fiber cores in the long-path direction and high overall idle rate of the dedicated fiber cores of the trunk optical cable.

[0013] (2) The shared fiber cores of the trunk optical cable are completely consistent across all main distribution points. Setting them to a higher value would waste valuable fiber core resources, while setting them to a lower value would result in insufficient fiber cores in some sections. When used for networking equipment connected to two specific main distribution points, there are many jumper points, which increases the attenuation of the optical transmission channel.

[0014] (3) Since the reserved fiber core of the trunk optical cable is only at the aggregation room, when the main distribution point needs to cut out the optical cable fiber core, the operation is difficult and the operation risk is high.

[0015] (4) Due to the arbitrary setting of the main distribution point, business needs and network needs, and network needs and the underlying physical network itself cannot be matched. Summary of the Invention

[0016] Objective of the Invention: The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing an improved method for the backbone optical cable architecture of an optical distribution network, comprising the following steps:

[0017] Step 1: Configure the aggregation room, grid, and main distribution point;

[0018] Step 2, calculate the core requirements within the grid;

[0019] Step 3: Develop a main distribution point fusion fiber core distribution scheme;

[0020] Step 4: Deploy the main optical cable, terminate and splice the fiber cores.

[0021] Step 1 includes: dividing the business into grids, stitching together k grids to form a business area, setting up a unique aggregation room in the business area, and setting up k-1 main distribution points in the k-1 grids other than the grid where the unique aggregation room is located. Each main distribution point is unique within its grid, and k is a natural number greater than 1.

[0022] Step 2 includes: estimating the demand for the main distribution point base station, home broadband, and enterprise fiber core as A. i B i and C i Summarize the exclusive fiber core demand of the main allocation point X i =(A i +B i +C i )×(1+δ i ), where δ i Let be the redundancy coefficient of the i-th primary allocation point, where i takes values ​​from 1 to k-1.

[0023] In step 3, the fiber unit in the trunk optical cable is broken down into dedicated fiber segments located at both ends and shared fiber segments located between the dedicated fiber segments. The dedicated fiber segment Y of the i-th main distribution point is set. i And the dedicated fiber segment core Y of the (k-1-i)th primary distribution point k-1-i for:

[0024] Y i =Y k-1-i =roundup(max(X) i ,X k-1-i ) / 12,0)×12;

[0025] Where roundup is the floor function; max is the function that takes the maximum value.

[0026] Shared fiber cores can be reserved based on shared fiber core segments between dedicated fiber segments;

[0027] Configure the shared fiber segment core Z of the i-th primary distribution point. i The shared fiber segment core Z of the (k-1-i)th primary distribution point k-1-i for:

[0028] Z i =Z k-1-i =Y i =Y k-1-i .

[0029] In step 3, when the total number of main distribution points k-1 is odd, the k / 2th main distribution point is the central main distribution point. The optical cable segment that is relatively close to the aggregation equipment room is the dedicated fiber core segment, and the optical cable segment that is relatively far from the aggregation equipment room is the shared fiber core segment.

[0030] Centralized main distribution point exclusively enjoys fiber segment core Y k / 2 =roundup(X k / 2 ,0)×12,

[0031] Shared fiber segment core Z k / 2 =Y k / 2 .

[0032] Step 4 includes: deploying W-core backbone optical cables around the aggregation room and the i-th main distribution point;

[0033] Where W is the dedicated fiber segment core Y i The function is represented as

[0034] At the main distribution point, according to the integrated fiber core distribution scheme, the backbone optical fiber is terminated or spliced ​​using fusion splicing.

[0035] In step 4, the fiber core allocation scheme includes: at the i-th main allocation point and the k-1-i-th main allocation point, respectively, establishing dedicated optical fibers Y corresponding to the i-th main allocation point and the k-1-i-th main allocation point in the trunk optical cable. i Core, terminal shared fiber Y i Core, common terminal 4×Y i Core; respectively for the remaining WY i The main optical fiber cores are spliced, with a total of 2×(WY) splices. i )head.

[0036] In step 4, when the total number of primary distribution points k-1 is odd, there exists a central primary distribution point, and a dedicated fiber Y is formed at the central primary distribution point in the direction relative to the shortest axis. k / 2 Core, Y-shaped fiber terminated relative to the major axis k / 2 Core, common terminal 2×Y k / 2 Core, for the rest of WY k / 2 The main optical fiber cores are spliced, with a total of WY splices. k / 2 head.

[0037] The present invention has the following beneficial effects: improving the rationality of the main distribution point setting, increasing the utilization rate of the backbone optical fiber core, reducing the fiber jumper points of related optical transmission channels, optimizing the planning, construction and use of the optical distribution network, serving 5G / FG and 6G / F6G, and creating a more suitable underlying physical network.

[0038] In addition, if the physical conditions of the business area are limited and only a chain-type or tree-type backbone optical cable architecture can be implemented temporarily, an improved ODN backbone optical cable ring architecture method can be used for advance planning and construction.

[0039] Digital tools can be used to establish a front-end and back-end linkage mechanism for ODN, providing refined management functions, including business requirements analysis, network planning, and construction management. Attached Figure Description

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0041] Figure 1 This is a schematic diagram of the traditional ODN backbone optical cable ring architecture method.

[0042] Figure 2 This is a diagram of the method architecture of the present invention.

[0043] Figure 3 This is a schematic diagram of an embodiment of setting up a convergence server room and a main distribution point. Detailed Implementation

[0044] like Figure 2 As shown, the present invention provides an improved method for optical distribution network backbone optical cable architecture, comprising the following steps:

[0045] Step 1: Configure the aggregation room, grid, and main distribution point

[0046] Business grids are divided into areas with a total area of ​​no more than 0.5 square kilometers, and k grids are joined together to form a business area (k is any natural number greater than 1).

[0047] The business area is bounded by roads, bridges, rivers, lakes, parks, green belts, and other large obstacles that would impede the passage of fiber optic cables.

[0048] A single aggregation room should be set up in the business area, with no less than two optical fiber inlet and outlet routes. In principle, business within the business area should be concentrated in the aggregation room.

[0049] The grid where the aggregation room is located is also the main distribution point. Other grids have a unique main distribution point i = 1, 2, ..., k-1.

[0050] The main distribution point is typically an outdoor optical distribution box or access room located at an intersection, requiring at least two optical cable entry and exit routes.

[0051] Step 2: Calculate the core requirements within the mesh

[0052] The existence of individuals, families, and enterprises within the grid creates business needs, which in turn generate network construction needs, which in turn require the underlying physical network to support them.

[0053] Assuming the ODN backbone optical cable reconstruction period for a certain region is n years, estimate the demand for base stations, home broadband, and group fiber cores at each main distribution point over the next n years, divided into A... i B i and C i ;

[0054] δ i The redundancy coefficient (0-1) for each primary allocation point can be the same or different;

[0055] Then any primary distribution point has exclusive access to the fiber core demand X i =(A i +B i +C i )×(1+δ i ).

[0056] Step 3: Develop a main distribution point fusion core distribution scheme

[0057] Typically, the fiber unit in a trunk optical cable can be divided into dedicated fiber segments located at the beginning and end, and shared fiber segments located between the dedicated fiber segments.

[0058] If there exist primary distribution points k-1, k-2, ..., k-1-i that are logically symmetrical to primary distribution point 1, primary distribution point 2, ..., primary distribution point i, then they are grouped together, and the dedicated fiber segment core Y of the i-th primary distribution point is set. i And the dedicated fiber segment core Y of the (k-1-i)th primary distribution point k-1-i for:

[0059] Y i =Y k-1-i =roundup(max(X) i ,X k-1-i ) / 12,0)×12;

[0060] Where roundup is the floor function; max is the function that takes the larger value.

[0061] The shared fiber core is reserved based on the shared fiber core segment between dedicated fiber segments. The shared fiber core Z of the i-th primary distribution point. i The shared fiber segment core Z of the (k-1-i)th primary distribution point k-1-i for:

[0062] Z i =Z k-1-i =Y i =Y k-1-i .

[0063] When the total number of primary distribution points k-1 is odd, the k / 2th primary distribution point is the central primary distribution point. The optical cable segment that is relatively close to the aggregation equipment room is the dedicated fiber segment, and the optical cable segment that is relatively far from the aggregation equipment room is the shared fiber segment.

[0064] Centralized main distribution point exclusively enjoys fiber segment core Y k / 2 =roundup(X k / 2 ,0)×12,

[0065] Shared fiber segment core Z k / 2 =Y k / 2 .

[0066] Step 4: Deploy the backbone optical cable, terminate and splice the fiber cores.

[0067] W-core backbone optical cables are deployed around the aggregation room and the main distribution point i.

[0068] The aggregation room and the main distribution point are determined in step 1.

[0069]

[0070] W is the dedicated fiber segment core. i The function.

[0071] At the main distribution point, based on the "dedicated + shared" integrated fiber core distribution scheme, the backbone optical fiber is terminated or spliced ​​using fusion splicing.

[0072] At the i-th and k-1-i-th primary distribution points, the dedicated optical fibers Y corresponding to the i-th and k-1-i-th primary distribution points in the terminated trunk optical cable are respectively... i Core, terminal shared fiber Y i Core, common terminal 4×Y i Core; respectively for the remaining WY i The main optical fiber cores are spliced, with a total of 2×(WY) splices. i )head.

[0073] When the total number of primary distribution points k-1 is odd, there exists a central primary distribution point, and the fiber Y is exclusively terminated at the central primary distribution point in the direction relative to the minor axis. k / 2 Core, Y-shaped fiber terminated relative to the major axis k / 2 Core, common terminal 2×Y k / 2 Core, for the rest of WY k / 2 The main optical fiber cores are spliced, with a total of WY splices. k / 2 head.

[0074] Example

[0075] like Figure 3As shown, a certain area is divided into 7 business grids with a total area of ​​no more than 0.5 square kilometers, which are then joined together to form a single business area. This business area is separated from other business areas by roads.

[0076] A single aggregation data center is set up in the business area, and all business within the business area is concentrated in the aggregation data center.

[0077] Except for grid 7 where the aggregation room is located, each of the other six grids has a unique primary distribution point 1 to primary distribution point 6.

[0078] The reconstruction cycle for ODN backbone optical cables is 5 years. The fiber core demand for each distribution point base station, home broadband, and enterprise customer is calculated in the next 5 years, and a redundancy coefficient is set. The demand for dedicated fiber cores is shown in Table 1 below.

[0079] Table 1

[0080] main distribution point 1 2 3 4 5 6 <![CDATA[Base station fiber core (A i )]]> 20 16 32 40 28 18 <![CDATA[Home broadband fiber core (B i )]]> 20 18 16 30 24 22 <![CDATA[Inbound fiber core (C i )]]> 16 18 8 10 20 15 <![CDATA[Redundancy factor (δ i )]]> 0.15 0.2 0.1 0.2 0.3 0.4 <![CDATA[Exclusive core requirement (X i )]]> 64.4 62.4 61.6 96 93.6 77

[0081] Logically symmetrical principal allocation points 1 and 6, 2 and 5, and 3 and 4 are grouped together.

[0082] Then, the primary distribution point 1 and primary distribution point 6 are configured to have dedicated fiber segments:

[0083] Y1=Y6=roundup(max(X1,X6) / 12,0)×12=roundup(max(64.4,77) / 12,0)×12=84;

[0084] Configure primary distribution point 2 and primary distribution point 5 to have dedicated fiber optic segments:

[0085] Y2=Y5=roundup(max(X2,X5)×12,0)×12=roundup(max(62.4.2,93.6)×12,0)×12=96;

[0086] Configure primary distribution point 3 and primary distribution point 4 to have dedicated fiber optic segments:

[0087] Y3=Y4=roundup(max(X3,X4)×12,0)×12=roundup(max(61.6,96)×12,0)×12=96;

[0088] Shared fiber cores are reserved based on shared fiber core segments between dedicated fiber segments:

[0089] Primary distribution point 1 and primary distribution point 6 share the same fiber segment core Z1 = Z6 = Y1 = Y6 = 84;

[0090] Primary distribution point 2 and primary distribution point 5 share the same fiber segment core Z2=Z5=Y2=Y5=96;

[0091] Primary distribution point 3 and primary distribution point 4 share the same fiber segment core Z3=Z4=Y3=Y4=96;

[0092] Deployment around the aggregation data center and main distribution point The core is a main optical fiber cable, and the fiber sequence of the main optical fiber cable is 1 to 276.

[0093] At main distribution point 1 and main distribution point 6, 84 cores of dedicated optical fiber are spliced ​​at each point, and 84 cores of shared optical fiber are spliced ​​at each point, for a total of 4 × 84 = 336 cores. The fiber sequence on the trunk optical cable is 1 to 84. The remaining 276 - 84 = 192 cores of the trunk optical cable are spliced, for a total of 2 × (276 - 84) = 384 cores.

[0094] At main distribution point 2 and main distribution point 5, 96 cores of optical fiber are dedicated to each end, and 96 cores of optical fiber are shared to each end, for a total of 4×96=384 cores. The corresponding fiber sequence on the trunk optical cable is 85 to 180 cores. The remaining 276-96=180 cores of the trunk optical cable are spliced, for a total of 2×(276-96)=360 cores.

[0095] At main distribution point 3 and main distribution point 4, 96 cores of optical fiber are dedicated to each end, and 96 cores of optical fiber are shared to each end, for a total of 4×96=384 cores. The corresponding fiber sequence in the trunk optical cable is 181 to 276 cores. The remaining 276-96=180 cores of the trunk optical cable are spliced, for a total of 2×(276-96)=360 cores.

[0096] The improved method for trunk optical cable fiber sequence allocation is shown in Table 2 below.

[0097] Table 2

[0098]

[0099] Compared with traditional methods, the improved method first divides the data into grids and then sets up the aggregation room and main distribution point. This can clearly define the service area, effectively predict service demand, and set redundancy coefficients.

[0100] The total amount of fiber cores is on the same order of magnitude, similar or slightly less.

[0101] Following traditional methods, and referring to the embodiments, the dedicated fiber core requirement is divided into east-west bidirectional, according to Y... i =roundup(X i The settings are / 12*2,0). Shared and reserved fiber cores are set according to the minimum value, that is, 1 fiber core unit (12 cores). A total of 276 backbone optical fiber cores are required. The backbone optical fiber sequence allocation is shown in Table 3 below.

[0102] Table 3

[0103]

[0104]

[0105] At each master distribution point, bidirectional termination is required for the shared and exclusive fiber cores of each master distribution point, and splicing is required for all other fiber cores.

[0106] Total number of terminals = (12×6 + (36+36+36+48+48+48))×2 = 648 cores

[0107] Total number of offspring = 276 × 6 - 12 × 6 + (36 + 36 + 36 + 48 + 48 + 48) = 1836 heads.

[0108] For trunk optical cables with the same core count, the improved method involves terminating 1104 cores at the main distribution point and splicing 1104 connectors. Fewer splices result in lower connector loss. While the total number of terminations increases, for the same main distribution point, the relatively independent dedicated, shared, and reserved fiber cores are integrated into the same optical fiber unit, resulting in a more concentrated range of termination cores, significantly simplifying the construction process and improving efficiency.

[0109] More importantly, the number of dedicated fiber cores in the short-diameter direction is doubled, resulting in minimal attenuation during distributed service activation and the highest utilization rate of backbone fiber cores. Shared fiber cores terminate at symmetrical main distribution points, reducing the number of jumper points to zero during equipment networking. Furthermore, shared fiber core segments can also be considered reserved fiber cores. When there is a need for splicing between asymmetrical main distribution points, a segment of shared fiber core can always be found for fiber splicing.

[0110] In its specific implementation, this application provides a computer storage medium and a corresponding data processing unit. The computer storage medium is capable of storing a computer program, which, when executed by the data processing unit, can run the invention's content regarding an improved optical distribution network backbone optical cable architecture method, as well as some or all of the steps in various embodiments. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0111] Those skilled in the art will clearly understand that the technical solutions in the embodiments of the present invention can be implemented using computer programs and their corresponding general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of computer programs, i.e., software products. These computer program software products can be stored in a storage medium and include several instructions to cause a device containing a data processing unit (which may be a personal computer, server, microcontroller, MUU, or network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of the present invention.

[0112] This invention provides an improved method for the backbone optical cable architecture of an optical distribution network. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. An improved method for constructing a backbone optical cable for an optical distribution network, characterized in that, Includes the following steps: Step 1: Configure the aggregation room, grid, and main distribution point; Step 2, calculate the core requirements within the grid; Step 3: Develop a main distribution point fusion fiber core distribution scheme; Step 4: Deploy the backbone optical cable, terminate and splice the fiber cores; Step 1 includes: dividing the business into grids, stitching k grids together to form a business area, setting up a unique aggregation room in the business area, and setting up k-1 main distribution points in the k-1 grids other than the grid where the unique aggregation room is located. Each main distribution point is unique within its grid, and k is a natural number greater than 1. Step 2 includes: estimating the demand for the main distribution point base station, home broadband, and enterprise fiber core as A. i B i and C i Summarize the exclusive fiber core demand of the main allocation point X i =(A i +B i +C i )×(1+δ i ), where δ i Let be the redundancy coefficient of the i-th primary allocation point, where i takes values ​​from 1 to k-1; In step 3, the dedicated fiber segment core Y of the i-th primary distribution point is configured. i And the dedicated fiber segment core Y of the (k-1-i)th primary distribution point k-1-i for: Y i =Y k-1-i =roundup(max(X i ,X k-1-i ) / 12,0)×12; Where roundup is the floor function; max is the function that takes the maximum value. Configure the shared fiber segment core Z of the i-th primary distribution point. i The shared fiber segment core Z of the (k-1-i)th primary distribution point k-1-i for: Z i =Z k-1-i =Y i =Y k-1-i 。 2. The method according to claim 1, characterized in that, In step 3, when the total number of main distribution points k-1 is odd, the k / 2th main distribution point is the central main distribution point. The optical cable segment that is relatively close to the aggregation equipment room is the dedicated fiber core segment, and the optical cable segment that is relatively far from the aggregation equipment room is the shared fiber core segment. Centralized main distribution point exclusively enjoys fiber segment core Y k / 2 =roundup(X k / 2 ,0)×12, Shared fiber segment core Z k / 2 =Y k / 2 .

3. The method according to claim 2, characterized in that, Step 4 includes: deploying W-core backbone optical cables around the aggregation room and the i-th main distribution point; Where W is the dedicated fiber segment core Y i The function is represented as: ， At the main distribution point, according to the integrated fiber core distribution scheme, the backbone optical fiber is terminated or spliced ​​using fusion splicing.

4. The method according to claim 3, characterized in that, In step 4, the fiber core allocation scheme includes: at the i-th main allocation point and the k-1-i-th main allocation point, respectively, establishing dedicated optical fibers Y corresponding to the i-th main allocation point and the k-1-i-th main allocation point in the trunk optical cable. i Core, terminal shared fiber Y i Core, common terminal 4×Y i Core; respectively for the remaining WY i The main optical fiber cores are spliced, with a total of 2×(WY) splices. i )head.

5. The method according to claim 4, characterized in that, In step 4, when the total number of primary distribution points k-1 is odd, there exists a central primary distribution point, and a dedicated fiber Y is formed at the central primary distribution point in the direction relative to the shortest axis. k / 2 Core, Y-shaped fiber terminated relative to the major axis k / 2 Core, common terminal 2×Y k / 2 Core, for the rest of WY k / 2 The main optical fiber cores are spliced, with a total of WY splices. k / 2 head.

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