CN109743111B - Construction method for reconstructing fiber-to-building access network - Google Patents
Construction method for reconstructing fiber-to-building access network Download PDFInfo
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Abstract
The invention discloses a construction method for transforming a fiber to the building access network, which comprises the following steps: selecting a standby fiber core, and additionally arranging a third-stage optical splitter in the corridor optical node box; the input end of the third-stage optical splitter is connected with the standby fiber core, and the output end of the third-stage optical splitter is connected with the home cable, so that the high-bandwidth requirements of part of users are met; the first-stage optical splitter in the machine room of the network distribution center is removed, the third-stage optical splitter is replaced by the last-stage optical splitter with higher splitting number, the input end of the last-stage optical splitter is connected with the standby fiber core, and the output end of the last-stage optical splitter is connected with the home optical cable, so that the high broadband requirements of more users are met. The invention can complete the construction and reconstruction of the fiber-to-the-building access network on the premise of not interrupting the network access of the on-network users, thereby meeting the requirements of partial users on high bandwidth, and having the outstanding advantages of strong adaptability, low cost, short construction period and the like.
Description
Technical Field
The invention relates to the technical field of optical fiber network reconstruction, in particular to a construction method for reconstructing an optical fiber to building access network.
Background
With the rapid development of the application of internet +, such as the development of applications of 4K video, internet of things, home visual communication, home video monitoring, remote medical treatment and the like, the demand of broadcasting and television users on uplink and downlink bandwidth is continuously and rapidly increased. Although the existing radio and television Fiber To The Building (FTTB) network can meet the requirement of the three-network convergence service, due to the limitation of the existing network infrastructure, if all network foundations are reconstructed, the problems that the construction is difficult to expand, the fund is deposited and cannot be implemented exist often; especially for old cells covered by the original Fiber To The Building (FTTB) network, if the network reconstruction is carried out in a full-coverage mode, the problems of high labor cost, high construction cost, long construction period, serious resource waste, large difference between actual income and expected income and the like exist, and the normal network access of an on-line user is inevitably influenced in the process of optical cable cutting, so that the existing construction method for network reconstruction brings troubles that the user cannot access the network, influences user data and broadcasting service, and brings very poor user experience.
Therefore, how to implement the construction and modification of the fiber-to-the-building access network quickly and at low cost on the premise of not influencing the normal network access of the on-line user becomes a key point of urgent solution and research of technical problems of the technical personnel in the field.
Disclosure of Invention
The invention provides a construction method for reconstructing a fiber to the building access network, in particular to a design method which can effectively utilize the fiber resources of the original foundation of the Fiber To The Building (FTTB) network and realize the high-bandwidth accurate access of a data channel on the premise of not changing the original network infrastructure.
In order to achieve the technical purpose, the invention discloses a construction method for transforming a fiber to the building access network, which comprises the following steps;
step 1, acquiring the occupation proportion of users with the required bandwidth higher than the preset bandwidth in all users of the whole building;
step 2, judging whether the occupation ratio is less than or equal to a first threshold value: if yes, executing step 3; if not, ending;
step 3, selecting a standby fiber core from all optical cables in the in-use fiber-to-building access network, keeping a first-stage optical splitter in a machine room of a network distribution center and a second-stage optical splitter at a cell optical node unchanged, and additionally arranging a third-stage optical splitter in a corridor optical node box; the input end of the third-stage optical splitter is connected with the standby fiber core, and the output end of the third-stage optical splitter is connected with the home cable;
step 4, judging whether the occupation ratio is larger than a second threshold value: if yes, executing step 5; if not, re-executing the step 4; wherein the second threshold is less than the first threshold;
step 5, removing a first-stage optical splitter in a machine room of the network distribution center, keeping a second-stage optical splitter at an optical node of a cell unchanged, replacing a third-stage optical splitter with a last-stage optical splitter, connecting the input end of the last-stage optical splitter with the standby fiber core, and connecting the output end of the last-stage optical splitter with a home cable; the number of branches of the final-stage optical splitter is greater than that of the third-stage optical splitter.
Further, the first threshold value is 25%, and the second threshold value is 12.5%.
Further, in step 3, the first-stage optical splitter is a 1 × 2 optical splitter, and the third-stage optical splitter is a 1 × 4 optical splitter;
in step 5, the final optical splitter is a 1 × 8 optical splitter.
Further, the second-stage optical splitter is a 1 × 8 optical splitter.
Further, in step 3, the input end of the third-stage optical splitter has a tail fiber, and the input end of the third-stage optical splitter is connected to the spare core by fusing the tail fiber to the spare core.
Further, step 3 includes a step of providing a PE optical fiber protection tube on the spare core before the pigtail is fusion spliced with the spare core.
Further, in step 3, the output end of the third stage optical splitter is provided with an outgoing fiber, and the output end of the third stage optical splitter is connected with the home cable by fusing the outgoing fiber and the home cable.
Further, in step 3, before the outgoing fiber is fusion-spliced with the home optical cable, a step of arranging a PE optical fiber protection tube on the outgoing fiber is further included.
Further, in step 3, the first-stage optical splitter in the network distribution center room is connected with the optical distribution frame in a jumper connection mode.
Further, the first stage optical splitter, the second stage optical splitter, the third stage optical splitter and the final stage optical splitter are all box splitters.
The invention has the beneficial effects that:
the invention can complete the construction and reconstruction of the fiber-to-the-building access network on the premise of not interrupting the network access of the on-line users, thereby meeting the requirements of part of users on high bandwidth. The construction method for transforming the fiber-to-the-building access network has the characteristics of strong adaptability and the like, and can realize partial network transformation by utilizing the spare fiber core with better quality in the cell particularly for old cells so as to avoid the problems of capital precipitation, difficult construction expansion and the like caused by all transformation; the construction field test shows that the invention can meet the access requirement of 25 percent of users to the high-bandwidth network for all users in a building.
Drawings
Fig. 1 is a schematic flow chart of a construction method for transforming a fiber to the building access network.
Fig. 2 is a schematic diagram of a topology of an optical fiber network when a proportion of users with high bandwidth requirements is less than or equal to 12.5%.
Fig. 3 is a schematic diagram of a fiber network topology when the occupancy ratio of high bandwidth demand users is greater than 12.5% and less than or equal to 25%.
Detailed Description
The construction method for the reconstruction of the fiber-to-building access network proposed by the present invention is explained and explained in detail below with reference to the drawings of the specification.
As shown in fig. 1 to 3, the present embodiment discloses a construction method for transforming a fiber to the building access network, which meets the requirement of a user for high bandwidth.
For the unidirectional broadcast service (such as live broadcast service) of a Fiber To The Building (FTTB) user, the deployed coaxial Network in the corridor is continuously utilized for carrying, that is, on the premise of not interrupting the on-line user, on the basis of the existing Network technical scheme of radio and television, the unused fiber core in the same Optical cable is utilized for transmitting data signals, so that high-bandwidth access to part of users is realized, the construction transformation of a PON (Passive Optical Network ) system for transmitting signals is realized, the implementation work is easy to develop, the large-scale line reconstruction is avoided, and the cost is reduced; the implementation method is shown in fig. 1 and specifically described as follows.
Step 1, acquiring the occupation proportion of users with the required bandwidth higher than the preset bandwidth in all users of the whole building, namely, the method is developed based on the high-bandwidth service requirement, so that the method does not cause huge fund deposition, and is particularly suitable for cells without large-scale trunk and branch line transformation construction.
Step 2, judging whether the occupation ratio is less than or equal to a first threshold value: if yes, executing step 3; if not, ending; thereby judging whether the invention meets the actual requirement; in this embodiment, the first threshold is 25%. The invention utilizes the optical fiber (1 core or 2 cores) reserved by the corridor optical splitting node of the FTTB to the home to accurately access the channel optical network structure, and the original FTTB optical cable broadcast television signals and data optical signals are transmitted and maintained in the fiber core of the same optical cable, thereby avoiding the waste problem, the long period and the like caused by abandoning the original fiber core.
Step 3, selecting a standby fiber core from all optical cables in the in-use fiber-to-building access network, keeping a first-stage optical splitter in a machine room of a network distribution center and a second-stage optical splitter at a cell optical node unchanged, and additionally arranging a third-stage optical splitter in a corridor optical node box; the input end of the third-stage optical splitter is connected with the standby fiber core, and the output end of the third-stage optical splitter is connected with the home cable, namely, the output end of the third-stage optical splitter is connected with the home cable for acquiring users with the required bandwidth higher than the preset bandwidth, so that the three-stage light splitting of the data channel is completed; according to the invention, data signals are transmitted by using unused fiber cores in the same optical cable, and the optical splitter is installed at the corridor optical node, so that the high-bandwidth accurate access of a data channel is realized, and the requirements of partial users on high bandwidth are met.
In this embodiment, as shown in fig. 2, the first-stage optical splitter is a 1 × 2 optical splitter, the second-stage optical splitter is a 1 × 8 optical splitter, and the third-stage optical splitter is a 1 × 4 optical splitter, so that the data channel three-stage optical splitting in step 3 is 2 × 8 × 4, the first two-stage optical splitters do not need to be changed, and the third-stage optical splitter is placed in the corridor optical node box, as shown in fig. 2, the optical splitting structure is convenient for flexible adjustment in future construction without changing the structure of the entire optical fiber access network.
In specific implementation, the 1 × 4 optical splitter adopts a modular form with tail fibers and no plug, and the output end of the 1 × 4 optical splitter is not provided with a head fiber and a tail fiber and is butted with a home-entering double-core leather wire; specifically, the third-stage optical splitter in step 3 has a tail fiber at its input end, and the input end of the third-stage optical splitter is connected to the spare fiber core by fusion splicing the tail fiber to the spare fiber core, that is, the third-stage optical splitter is connected to the unused fiber core by thermal fusion, and the method further includes a step of providing a PE fiber protection tube on the spare fiber core before fusion splicing the tail fiber to the spare fiber core, and the third-stage optical splitter has an output fiber at its output end, and the third-stage optical splitter is connected to the service cable by fusion splicing the output fiber to the service cable, and further includes a step of providing a PE fiber protection tube on the output fiber before fusion splicing the output fiber to the service cable. In this step, the first-stage Optical splitter in the network distribution center machine room is connected to other devices (e.g., ODF, Optical distribution network, Optical distribution frame) by means of jumper connection. The accurate access of the invention utilizes the unused fiber core in the same optical cable in the original FTTB to transmit data signals, the fiber core and the tail fiber of the modular splitter are directly fused, and the PE optical fiber protection tube is sleeved for protection before fusion. The method can fully utilize the existing bidirectional network distribution network resources of the broadcast and television network, does not need to construct and lay the household cable again in a large scale, and provides a large-capacity and large-bandwidth data transmission network for users conveniently and quickly by saving time and labor.
Step 4, judging whether the occupation ratio is larger than a second threshold value: if yes, executing step 5; if not, re-executing the step 4; wherein the second threshold is less than the first threshold. In this embodiment, the second threshold is 12.5%. By judging whether the number of the high-bandwidth users is increased or not in the above manner, the invention can realize the accurate access design method for upgrading the high-bandwidth users from 12.5% to 25%, and the following step 5 is explained in detail; in addition, the 1-core optical fiber reserved for the corridor optical node is used in the step 3, the invention can also increase the large-bandwidth accurate access by starting the 2-core optical fiber (namely two fiber cores), and the mode can ensure that the network accessed in the step 3 is not influenced and the user service is not interrupted.
Step 5, removing a first-stage optical splitter in a machine room of the network distribution center, keeping a second-stage optical splitter at an optical node of the cell unchanged, replacing a third-stage optical splitter with a last-stage optical splitter, connecting the input end of the last-stage optical splitter with the standby fiber core, and connecting the output end of the last-stage optical splitter with the home optical cable, so that accurate access of increased bandwidth is realized; as shown in fig. 3, a splitter (1 × 2 optical splitter) on the middle side of an OLT (optical line terminal) is removed, and a quarter-splitter PLC in a corridor optical node box is changed to an eight-splitter PLC; after the network structure is adjusted according to the method, any user covered by the optical division node in the building can be directly laid and opened through the rubber-insulated optical cable if the user has the requirement of bidirectional high bandwidth, and the unidirectional broadcast television service can still utilize the original FTTB network. In addition, the connection method of the input end and the output end of the final-stage optical splitter is the same as that of the third-stage optical splitter. Based on the technical scheme, the method and the device can realize accurate access to 12.5-25% of users with high bandwidth requirements.
It should be emphasized that the invention does not need to repeatedly construct the main optical fiber link, only needs to perform construction transformation in the machine room of the network distribution center and the corridor optical node box and start the idle fiber core in the optical cable, and has the advantages of conveniently and efficiently realizing the requirement of the user on high bandwidth. In this embodiment, the final optical splitter is a 1 × 8 optical splitter; therefore, the three-level light splitting of the data channel in the step 5 is 1 × 8 × 8, an Optical splitter in a PON (Passive Optical Network ) system in a Network distribution center machine room is removed, the second-level Optical splitter does not need to be changed, and the third-level Optical splitter is replaced with the 1 × 8 Optical splitter; the PON system based on the Ethernet can adopt downstream 1490nm wavelength and upstream 1310nm wavelength for optical transmission. As a preferable embodiment, the first stage optical splitter, the second stage optical splitter, the third stage optical splitter, and the final stage optical splitter according to the present invention are all cassette splitters. As shown in fig. 2 and 3, the "ONU" referred to in the user part means "Optical Network Unit," the "Optical Network Unit," and "STB" means "Set Top Box," the "television Set-Top Box," and "PC" means "computer. In this embodiment, in the corridor optical branching node box, the optical fiber standby fiber core in the optical cable terminal box is fusion-spliced with the fiber entering of the 1 × 4 box-type splitter, and the PE optical fiber protection tube is sleeved before fusion splicing to prevent the fiber from being broken, so that when a user under the optical branching node handles high bandwidth, the fiber exiting of the 1 × 4 box-type splitter is fusion-spliced with the house-entering rubber-covered wire optical cable, and the PE optical fiber protection tube is used to protect the fiber. The broadcasting and television FTTB network equipment comprises data channel FTTB data office end equipment and a traditional broadcasting channel optical receiver which are fixed through an optical receiver pendant, wherein the FTTB data office end equipment is installed through a fixed hanging wire. The design method of the invention does not affect the use of FTTB network users, has simple construction process, only utilizes the spare fiber core of the optical cable, performs light splitting through a 1 x 4 box-type splitter, uses a PE optical fiber protection tube for optical fiber protection, and completes optical fiber connection in an optical fiber hot melting mode, thereby realizing the accurate access of high-bandwidth users.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A construction method for reconstructing an optical fiber to a building access network is characterized by comprising the following steps: the construction method comprises the following steps;
step 1, acquiring the occupation proportion of users with the required bandwidth higher than the preset bandwidth in all users of the whole building;
step 2, judging whether the occupation ratio is less than or equal to a first threshold value: if yes, executing step 3; if not, ending;
step 3, selecting a standby fiber core from all optical cables in the in-use fiber-to-building access network, keeping a first-stage optical splitter in a machine room of a network distribution center and a second-stage optical splitter at a cell optical node unchanged, and additionally arranging a third-stage optical splitter in a corridor optical node box; the input end of the third-stage optical splitter is connected with the standby fiber core, and the output end of the third-stage optical splitter is connected with an in-house optical cable for acquiring users with required bandwidth higher than preset bandwidth;
step 4, judging whether the occupation ratio is larger than a second threshold value: if yes, executing step 5; if not, re-executing the step 4; wherein the second threshold is less than the first threshold;
step 5, removing a first-stage optical splitter in a machine room of the network distribution center, keeping a second-stage optical splitter at an optical node of a cell unchanged, replacing a third-stage optical splitter with a last-stage optical splitter, connecting the input end of the last-stage optical splitter with the standby fiber core, and connecting the output end of the last-stage optical splitter with a home cable; the number of branches of the final-stage optical splitter is greater than that of the third-stage optical splitter.
2. The construction method for the reformation of a fiber-to-building access network according to claim 1, characterized in that: the first threshold value is 25%, and the second threshold value is 12.5%.
3. The construction method for the reconstruction of a fiber to the building access network according to claim 1 or 2, characterized in that:
in step 3, the first-stage optical splitter is a 1 × 2 optical splitter, and the third-stage optical splitter is a 1 × 4 optical splitter;
in step 5, the final optical splitter is a 1 × 8 optical splitter.
4. A construction method for the transformation of a fiber to the building access network according to claim 3, characterized in that: the second-stage optical splitter is a 1 x 8 optical splitter.
5. The construction method for the reformation of a fiber-to-the-building access network according to claim 1 or 4, characterized in that:
in step 3, the input end of the third-stage optical splitter is provided with a tail fiber, and the input end of the third-stage optical splitter is connected with the standby fiber core in a mode of welding the tail fiber and the standby fiber core.
6. The construction method for the reformation of a fiber-to-building access network of claim 5, characterized in that:
and 3, before the fusion welding of the tail fiber and the spare fiber core, arranging a PE optical fiber protection tube on the spare fiber core.
7. The construction method for the reformation of a fiber-to-building access network according to claim 1, characterized in that:
in step 3, the output end of the third-stage optical splitter is provided with an outgoing fiber, and the output end of the third-stage optical splitter is connected with the home-entering optical cable in a mode of welding the outgoing fiber and the home-entering optical cable.
8. The construction method for fiber to building access network modification of claim 7, wherein:
and 3, before the fiber is fused with the home-entry optical cable, arranging a PE optical fiber protection tube on the fiber.
9. The construction method for fiber to building access network modification of claim 8, wherein:
in step 3, the first-stage optical splitter in the network distribution center machine room is connected with the optical distribution frame in a jumper connection mode.
10. A construction method for the modernization of a fiber to the building access network according to claim 1 or 9, characterized in that: the first-stage optical splitter, the second-stage optical splitter, the third-stage optical splitter and the final-stage optical splitter are all box-type splitters.
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