CN219459242U - Gigabit optical fiber access system of broadcast television bidirectional network - Google Patents

Abstract

The utility model discloses a broadcast television bidirectional network gigabit optical fiber access system, which relates to the field of optical fiber network upgrading construction; the system comprises a broadcasting network module and an agile optical network; the two-way optical fiber access equipment comprises an optical line signal source and an output unit; the optical line signal source comprises a first signal source and a second signal source; the output unit comprises a first data output unit and a second data output unit; the optical splitter set of the agile optical network comprises a first group of optical splitters, a second group of optical splitters and a third group of optical splitters; the amplifier, the broadcast television terminal and the first group of optical splitters form a broadcast television channel; the first signal source, the first data output unit and the second group of optical splitters form a first data channel; the second signal source, the second data output unit and the third group of optical splitters form a second data channel; the utility model can realize kilomega upgrade iteration of the broadcast and television network.

Description

Gigabit optical fiber access system of broadcast television bidirectional network

Technical Field

The utility model relates to the field of optical fiber network upgrading construction, in particular to a broadcast television bidirectional network gigabit optical fiber access system.

Background

The capacity expansion and speed increase of the optical fiber network are promoted, the whole coverage of the gigabit optical fiber network is realized, the construction of the gigabit optical fiber network becomes the key point of the current new construction and network construction, telecom operators speed up the construction pace of the capacity expansion of the gigabit network in a dispute way, and the gigabit service is brought into a large-scale commercial age.

The broadcasting and television network follows the age pace, and in order to continuously meet the increasing audiovisual demands of people, the network optical fiber process is being actively promoted. However, because the current broadcast and television networks in all places are different in implementation modes due to the fact that the two-way construction is different, the technical scheme of EPON or GPON is still adopted for optical fiber deployment in most areas, the large-scale deployment of the terapon is not started, even a plurality of areas are mainly covered by the two-way network by the optical fiber to building technology with limited bandwidth such as EOC, DOCSIS and the like, the optical fiber to the home improvement does not reach a certain scale, and the large-scale gigabit service cannot be developed. How to grasp opportunities in the current kilomega capacity expansion climax of the broadcast television network, and combine the network foundation of the broadcast television network with the establishment of new and improved upgrade plans of the optical fiber access network according to local conditions, so as to realize kilomega upgrade iteration of the broadcast television network, thereby becoming a difficult problem for the broadcast television network companies in all places.

Disclosure of Invention

The utility model aims to provide a broadcast television bidirectional network gigabit optical fiber access system which can realize the gigabit upgrading iteration of a broadcast television network.

In order to achieve the above object, the present utility model provides the following solutions:

a broadcast television bi-directional network gigabit fiber access system, the access system comprising: a broadcast network module and an agile optical network; the agile optical network comprises an optical splitter set; the optical splitter set includes: the first group of optical splitters, the second group of optical splitters and the third group of optical splitters;

the broadcast network module is arranged between the signal source and the user terminal; the broadcast network module includes: broadcast television equipment and two-way optical fiber access equipment;

the broadcast television apparatus includes an amplifier and a broadcast television terminal; the amplifier and the broadcast television terminal are connected through the first group of optical splitters;

the bidirectional optical fiber access device includes: an optical line signal source and an output unit; the optical line signal source comprises a first signal source and a second signal source; the output unit comprises a first data output unit and a second data output unit; the first signal source and the first data output unit are connected through the second group of optical splitters; the second signal source and the second data output unit are connected through the third group of optical splitters;

The amplifier, the broadcast television terminal and the first group of optical splitters form a broadcast television channel; the first signal source, the first data output unit and the second group of optical splitters form a first data channel; the second signal source, the second data output unit and the third group of optical splitters form a second data channel; the data processing rates of the first data channel and the second data channel are different.

Optionally, the first signal source includes an EPON board card; the second signal source comprises an XG-PON board card.

Optionally, the amplifier and the broadcast television terminal are both connected with the first group of optical splitters through optical cables; the first signal source and the first data output unit are connected with the second group of optical splitters through optical cables; the second signal source and the second data output unit are both connected with the third group of optical splitters through optical cables.

Optionally, the agile optical network further includes: an optical distribution frame; the optical distribution frame is used for clamping the optical cable.

Optionally, the agile optical network adopts a three-stage optical splitting structure.

Optionally, the first group of optical splitters includes at least one optical splitter; the second group of optical splitters at least comprises one optical splitter; the third group of optical splitters comprises at least one optical splitter.

Optionally, the optical splitter is in a plug-in type structure or a box type structure.

Optionally, when the optical splitter is in an inserting sheet type structure, the optical splitter is connected in a flange jump connection mode; when the optical branching device is of a box type structure, the optical branching device is connected in a direct melting mode.

According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:

the utility model provides a broadcast television bidirectional network gigabit optical fiber access system, which is characterized in that a first group of optical splitters are arranged between an amplifier of broadcast television equipment and a broadcast television terminal, a second group of optical splitters are arranged between a first signal source and a first data output unit, and a third group of optical splitters are arranged between the second signal source and a second data output unit, so that the system finally comprises three channels such as a broadcast television channel, a first data channel and a second data channel, and the proper channel can be selected and built according to the requirements of a user side. The utility model combines the agile optical network, the bidirectional optical fiber access equipment and the broadcast television equipment, reserves the broadcast television channel, establishes the first data channel and the second data channel, can obtain the channels after being mutually combined by combining different scenes, and realizes the construction or upgrading of the gigabit network of the optical fiber to the home, thereby completing the gigabit upgrading iteration of the broadcast television network with high bandwidth and smooth realization.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a broadcast television bidirectional network gigabit optical fiber access system provided by the utility model;

fig. 2 is a schematic structural diagram of the bi-directional network gigabit optical fiber access system for broadcast television provided by the utility model in practical application;

FIG. 3 is a schematic structural diagram of a first mode provided by the present utility model;

FIG. 4 is a schematic structural diagram of a second mode according to the present utility model;

FIG. 5 is a schematic structural diagram of a third mode according to the present utility model;

fig. 6 is a schematic structural diagram of a fourth mode provided by the present utility model.

Symbol description:

the system comprises an amplifier-1, a broadcast television terminal-2, a first group of optical splitters-3, a first signal source-4, a second signal source-5, a first data output unit-6, a second data output unit-7, a second group of optical splitters-8, a third group of optical splitters-9, an agile optical network-10, a first amplifier-11, a first 1 x 4 optical splitter-12, a first ODF frame-13, a first 6-core optical cable-14, a first 1 x 8 optical splitter-15, a first 4-core optical cable-16, a first 1 x 16 optical splitter-17, a first 2-core flex optical cable-18, a first house type optical receiver-19, a first XG-PONPON board-20, a second 1 x 8 optical splitter-21, a first 1 x 2 optical splitter-22 a second 1×2 optical splitter-23, a third 1×2 optical splitter-24, a fourth 1×2 optical splitter-25, a third 1×8 optical splitter-26, a first ONU-27, a second amplifier-28, a second 1×4 optical splitter-29, a third 1×4 optical splitter-30, a fourth 1×4 optical splitter-31, a fifth 1×4 optical splitter-32, a second ODF frame-33, a second 6-core optical cable-34, a fourth 1×8 optical splitter-35, a fifth 1×8 optical splitter-36, a sixth 1×8 optical splitter-37, a fifth 1×2 optical splitter-38, a sixth 1×2 optical splitter-39, a seventh 1×2 optical splitter-40, an eighth 1×2 optical splitter-41, a second 4-core optical cable-42, a third 1×2 optical splitter-42, a fourth 1×2 optical splitter-41, a fourth 1×2 optical cable-42, second 1×16 optical splitter-43, second 2-core rubber-covered wire optical cable-44, third 2-core rubber-covered wire optical cable-45, second in-house type optical receiver-46, second ONU-47, third in-house type optical receiver-48, third ONU-49, first EPON PON board-50, second XG-PONPON board-51, third amplifier-52, 1×3 optical splitter-53, sixth 1×4 optical splitter-54, seventh 1×4 optical splitter-55, eighth 1×4 optical splitter-56, ninth 1×4 optical splitter-57, tenth 1×4 optical splitter-58, seventh 1×8 optical splitter-59, eighth 1×8 optical splitter-60, ninth 1×8 optical splitter-61, tenth 1×8 optical splitter-62, third ODF frame-63, fourth optical splitter-55 the optical fiber cable comprises a third 4-core optical cable-64, a fourth 4-core optical cable-65, a fourth 2-core rubber-covered wire optical cable-66, a coaxial network-67, a second EPON PON board-68, a third XG-PON board-69, an EOC terminal CNU-70, a first outdoor optical receiver-71, a fourth ONU-72, a fourth indoor optical receiver-73, an EOC local side CBAT-74, a fifth ONU-75, a third 1×16 optical splitter-76, a fourth amplifier-77, a fifth amplifier-78, an eleventh 1×4 optical splitter-79, an eleventh 1×8 optical splitter-80, a fourth 1×16 optical splitter-81, a fifth indoor optical receiver-82, a sixth indoor optical receiver-83, a twelfth 1×8 optical splitter-84, a thirteenth 1×8 optical splitter-85, a fourth amplifier-80, the system comprises a fifth 2-core rubber-insulated-wire cable-86, a sixth ONU-87, a set top box-88, a twelfth 1 multiplied by 4 optical splitter-89, a sixth 2-core rubber-wire cable-90, a seventh ONU-91, a third EPON PON board-92 and a fourth XG-PONPON board-93.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model aims to provide a broadcast television bidirectional network gigabit optical fiber access system which can realize the gigabit upgrading iteration of a broadcast television network.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1, the present utility model provides a bi-directional network gigabit optical fiber access system for broadcast television, which comprises: a broadcast network module and agile optical network 10; the agile optical network 10 comprises a set of optical splitters comprising: a first group of optical splitters 3, a second group of optical splitters 8 and a third group of optical splitters 9. The broadcast network module is arranged between the signal source and the user terminal; the broadcast network module includes: broadcast television equipment and bidirectional optical fiber access equipment. The first group of optical splitters 3, the second group of optical splitters 8 and the third group of optical splitters 9 each comprise a plurality of optical splitters.

The broadcast television equipment is equipment positioned between a signal source and a television in an digital television system, and modulates and demodulates voice and image signals by adopting DVB technology, and transmits the digital television signals through optical fibers, so that the quality of television receiving signals is improved, and the broadcasting of high-definition programs is realized.

The bidirectional optical fiber access device and the agile optical network 10 are important components of a broadcast and television optical fiber access network, and are used for bidirectional data signal transmission. The bidirectional optical fiber access equipment comprises an optical line signal source and an output unit. The transmission medium between the devices is an optical fiber and the communication means is full duplex.

The broadcast television apparatus includes an amplifier 1 and a broadcast television terminal 2; the amplifier 1 and the broadcast television terminal 2 are connected by a first set of optical splitters 3.

The bidirectional optical fiber access device includes: an optical line signal source and an output unit; the optical line signal source comprises a first signal source 4 and a second signal source 5; the output unit includes a first data output unit 6 and a second data output unit 7; the first signal source 4 and the first data output unit 6 are connected through a second group of optical splitters 8; the second signal source 5 and the second data output unit 7 are connected through a third group of optical splitters 9; the amplifier 1, the broadcast television terminal 2 and the first group of optical splitters 3 form a broadcast television channel; the first signal source 4, the first data output unit 6 and the second group of optical splitters 8 form a first data channel; the second signal source 5, the second data output unit 7 and the third set of optical splitters 9 constitute a second data channel; the data processing rates of the first data channel and the second data channel are different.

The amplifier 1 and the broadcast television terminal 2 are connected with the first group of optical splitters 3 through optical cables; the first signal source 4 and the first data output unit 6 are connected with the second group of optical splitters 8 through optical cables; the second signal source 5 and the second data output unit 7 are both connected with the third group of optical splitters 9 through optical cables.

Specifically, the first signal source 4 includes an EPON board card; the second signal source 5 comprises an XG-PON board. Since the XG-PON board has a higher data processing speed than the EPON board and the first data output unit 6 and the second data output unit 7 are also different, the second signal source 5, the second data output unit 7, and the third group of optical splitters 9 constitute the second data channel, and have an advantage of high transmission rate compared to the first signal source 4, the first data output unit 6, and the second group of optical splitters 8 constitute the first data channel. Thus, the first data channel may also be referred to as a low-speed data channel and the second data channel may also be referred to as a high-speed data channel.

The agile optical network 10 belongs to one of optical distribution networks, and the agile optical network 10 comprises a set of optical splitters. The agile optical network 10 employs a three-stage optical splitting architecture. The first group of optical splitters 3 comprises at least one optical splitter; the second set of optical splitters 8 comprises at least one optical splitter; the third set of optical splitters 9 comprises at least one optical splitter. The structures of the optical splitters contained in each group of optical splitters are all of insert sheet structures or box structures. In short, the optical splitter is of a blade type structure or a box type structure.

When the optical branching device is of an inserting sheet type structure, the optical branching device is connected in a flange jump connection mode; when the optical branching device is of a box type structure, the optical branching device is connected in a direct melting mode.

Specifically, three-level light splitting structures are set up according to different positions of light splitting equipment, wherein the three-level light splitting structures are respectively a center machine room, a cell node and a building node. The optical splitters with the inserted sheet structures are adopted at the split center machine room and the building nodes, and the input and output are in a flange jumper connection mode, so that the splitter can be conveniently adjusted according to service conditions. The cell node adopts a box type structure, the input and output use a tail fiber direct melting mode, and the latter optical fiber network kilomega can be kept unchanged during upgrading. The structure of the broadcast television bidirectional network gigabit optical fiber access system in practical application is shown in fig. 2.

In practical application, a worker can adjust the optical splitter according to the use requirement of the user side to obtain a channel corresponding to a required mode.

As an alternative embodiment, the agile optical network 10 further comprises: an optical distribution frame; the optical distribution frame is used for clamping the optical cable.

The agile optical network 10 thus consists essentially of an optical distribution frame, optical splitter equipment, for connecting an optical line signal source to a plurality of terminals or output units.

Taking an EPON board card as a first signal source 4 and an XG-PON board card as a second signal source 5 as examples, the specific explanation of the broadcast television bidirectional network gigabit optical fiber access system is as follows:

the access system mainly comprises a broadcast television device based on DVB technology, a bidirectional optical fiber access device based on EPON and XG-PON technology and an agile optical network 10.

According to different application scenes, a broadcast digital television DVB channel is reserved, a low-speed bidirectional data channel is selected and matched, a high-speed data channel is established, and four modes of building or upgrading the optical fiber to the home gigabit network are formed. And combining the broadcast television channel, the first data channel and the second data channel to obtain the four-mode gigabit network.

Mode one: FTTH (dvb+xg-PON) is newly built, representing a combination of two lines of a broadcast television channel and a second data channel. The structure of this mode is shown in fig. 3 below.

Newly-built gigabit fiber to the home network in the mode reserves a broadcast television channel; by utilizing the advantages of an optical line terminal ComboXG-PON board card of a bidirectional optical fiber access device, two bidirectional data channels of high speed and low speed are constructed to respectively carry data services of different bandwidths.

When a broadcast and television optical fiber bidirectional gigabit access system is newly built, a DVB+XG-PON double-fiber three-wave technology system is adopted, a broadcast television channel is deployed by adopting DVB system equipment, a first amplifier 11 with 22dB output is installed in a split center machine room, the first amplifier 11 is connected with a first 1X 4 optical splitter 12 in a jumper connection mode after being output, the first 1X 4 optical splitter 12 is an inserting sheet type splitter, the output of the inserting sheet type splitter is directly jumped to a corresponding first ODF frame 13 of the machine room, the inserting sheet type splitter is connected with a first 1X 8 optical splitter 15 through a first 6-core optical cable 14, the first 1X 8 optical splitter 15 is placed at a cell node, the input and the output of the first 1X 8 optical splitter 15 are all connected with the first 1X 16 optical splitter 17 through a first 4-core optical cable 16, the input and the output of the first 1X 16 optical splitter 17 are all connected with a first home television signal receiving terminal 19 in a jumper connection mode, and the input and the output of the first home television signal receiving terminal 19 is completed.

The bidirectional data channel is deployed by adopting XG-PON equipment, see fig. 3, a first XG-PON board 20 is installed in a central office, after the PON port is output, the PON port is connected to a second 1×8 optical splitter 21 in a jumper manner, the output of the second 1×8 optical splitter 21 is directly jumped to a corresponding first ODF rack 13 of the office, the output of the second 1×8 optical splitter is directly jumped to a first ODF rack 13 of the office, the first 6-core optical cable 14 is connected to the first 1×2 optical splitter 22, the second 1×2 optical splitter 23, the third 1×2 optical splitter 24 and the fourth 1×2 optical splitter 25, the four 1×2 optical splitters are placed at a cell node, the input and output of the four 1×2 optical splitters are all connected to the third 1×8 optical splitter 26 in a direct-melting manner by the first 4-core optical cable 16, the input and output of the third 1×8 optical splitter 26 is all connected to a first ONU node by the jumper manner, the output of the third 1×8 optical splitter 26 is connected to the first data port of the first ONU27 by the first-core optical cable 18, and the bidirectional data transmission terminal 27 is completed by the home-use of the ONU.

Each cell node covers 256 users, a first 1×8 optical splitter 15 and four 1×2 optical splitters (namely, a first 1×2 optical splitter 22, a second 1×2 optical splitter 23, a third 1×2 optical splitter 24 and a fourth 1×2 optical splitter 25) are placed on each cell node, and the input and output of the optical splitters placed on the cell nodes are in a direct fusion mode, so that the stability of the network structure is maintained. The trunk optical cable laid corresponding to each cell node is 6 cores, wherein a broadcast television channel occupies 1 core, a bidirectional data channel occupies 4 cores, and the rest 1 core is used for redundancy backup.

Each building node covers 32 users, each building node is provided with a first 1×16 optical splitter 17 and a third 1×8 optical splitter 26, each building node is provided with 4 branch optical cables which are laid correspondingly, wherein a broadcasting television channel occupies 1 core, a bidirectional data channel occupies 1 core, and the rest 2 cores are used for redundancy backup.

Each user lays a first 2-core rubber-insulated-wire cable 18 for each user, and one core is used for transmitting broadcast television signals and is in butt joint with the output of the first 1X 16 optical splitter 17; a core is used to transmit bi-directional data signals interfacing with the output of the third 1 x 8 optical splitter 26.

In the first mode, the newly built gigabit network is provided with three channels, namely a DVB channel with broadcasting and television characteristics and a high data channel and a low data channel which are built by utilizing the technical characteristics of ComboXG-PON, when the user data service is lower than 500M, the GPON gigabit ONU is used for carrying the data service, and when the user data service is higher than or equal to 500M, the XG-PON gigabit ONU is used for carrying the data service.

In the first mode, the broadcast television channel adopts a three-level light splitting structure, the total light splitting ratio is 4×8×16=512, and each 32 users covered are provided with a 1×16 light splitter, so that the access ratio of the broadcast television service is allowed to be 16/32=50%. The bidirectional data channel adopts a three-level light splitting structure, the total light splitting ratio is 8 multiplied by 2 multiplied by 8=128, each 32 users are covered with one 1 multiplied by 8 light splitter, and the allowable access ratio is 8/32=25%. If the access proportion of the data users exceeds 25%, only the 1X 8 optical splitter placed in the central machine room is changed into the 1X 4 optical splitter, the 1X 8 optical splitter placed in the building node is updated into the 1X 16 optical splitter, the corresponding XG-PON port number is increased, other network structures are not moved, and the access proportion of the users can be conveniently and rapidly increased to 50%; the method has the advantages that the data users have overlarge flow, the 1X 8 optical splitters arranged in the branch center machine room can be reduced to 1X 4 optical splitters, the corresponding number of XG-PON ports is increased, the average bandwidth of the house can be smoothly improved, and the flow capacity expansion is carried out.

Mode two: FTTH (dvb+epon+xg-PON) represents a combination of broadcast television channels, first data channels and second data channel lines. The structure of this mode is shown in fig. 4 below.

The mode reserves a broadcast television channel and a low-speed data channel on the basis of a network of FTTH (DVB+EPON); by utilizing the optical line terminal XG-PON board card of the bidirectional optical fiber access equipment and the redundant fiber cores of the agile optical network 10, a high-speed data channel is built in a superposition way, the initial gigabit service access proportion is 12.5%, for example, the local area high-speed channel service is increased, and the gigabit service access proportion can be improved by adjusting an optical splitter, so that the existing investment is protected, and the smooth upgrading iteration of the gigabit optical fiber home network is completed.

In the second mode, the broadcast television network has completed the FTTH construction of DVB+EPON, and has completed the DVB channel of broadcast television and the two-way data EPON channel, and has the capacity of hundred megafibers for home entry. The second amplifier 28 with 22dB output is installed in the split center machine room, the output of the second amplifier 28 is connected with the second 1×4 optical splitter 29 in a jumper connection mode, the output of the second 1×4 optical splitter 29 is directly connected to a second ODF frame 33 corresponding to the machine room in a jumper connection mode, the output of the second 1×4 optical splitter 29 is connected with the fourth 1×8 optical splitter 35 through a second 6-core optical cable 34, the fourth 1×8 optical splitter 35 is placed at a cell node, the input and the output of the fourth 1×8 optical splitter 35 are all connected with the second 1×16 optical splitter 43 through a second 4-core optical cable 42, the second 1×16 optical splitter 43 is placed at a building node, the input and the output of the second 1×16 optical splitter 43 are all connected with a second indoor type optical receiver 46 through a second 2-core rubber-insulated cable 44, and the output signal of the second indoor type optical receiver 46 is connected with a television terminal of a user family, and the transmission of a television signal of a broadcast is completed.

The bidirectional data channel is deployed by using EPON equipment, a first EPON pon board 50 is installed in a central office, after pon port outputs, the pon port outputs are connected to a third 1×4 optical splitter 30 in a jumper manner, the output of the third 1×4 optical splitter 30 is directly jumped to a second ODF rack 33 corresponding to the office, the output of the third 1×4 optical splitter is directly jumped to a second ODF rack 33 corresponding to the office, the third 1×2 optical splitter is connected to a fifth 1×2 optical splitter 38, a sixth 1×2 optical splitter 39, a seventh 1×2 optical splitter 40 and an eighth 1×2 optical splitter 41 through a second 6 core optical cable 34, the four 1×2 optical splitters are placed at a cell node, the input and output of the fourth 1×2 optical splitter are all connected to a sixth 1×8 optical splitter 37 through a second 4 core optical cable 42, the sixth 1×8 optical splitter 37 is connected to a second ONU47, namely, the output port of the second ONU is connected to a second ONU corresponding to the output port of the data router for a home, and the like, and the bidirectional data transmission is completed.

In the second mode, an XG-PON high-speed data channel needs to be built by stacking on the basis of an original network, a second XG-PON board 51 needs to be newly installed in a central office, ports of the XG-PON board are directly connected to a fourth 1×4 optical splitter 31 in a jumper manner, the fourth 1×4 optical splitter 31 is an insert-type splitter, the outputs of the fourth 1×4 optical splitter are all connected to a second ODF rack 33 corresponding to the office in a jumper manner, the outputs of the fourth 1×4 optical splitter are connected to a fifth 1×8 optical splitter 36 through the remaining 1 core in the original second 6-core optical cable 34, the fifth 1×8 optical splitter 36 is placed at a cell node, the inputs and outputs of the fifth 1×8 optical splitter 36 are connected to the fifth 1×4 optical splitter 32 through the remaining 1 core in the original second 4-core optical cable 42 in a direct-melting manner. When the user has gigabit service demand, the television fiber core in the third 2-core rubber-insulated wire cable 45 is used for connecting the second 1×16 optical splitter 43 and the third indoor optical receiver 48, and the data fiber core in the third 2-core rubber-insulated wire cable 45 is used for connecting the fifth 1×4 optical splitter 32 with the third ONU49, namely the XG-PON, of the user home terminal, so that gigabit service access of the user home FTTH (dvb+xg-PON) is completed.

Each cell node covers 256 users, each cell node originally places a 1X 8 optical splitter and four 1X 2 optical splitters, and a 1X 8 optical splitter is newly placed for a high-speed data channel, and the input and output of the optical splitters at the cell nodes are in a direct melting mode. The trunk optical cable laid on each cell node is 6 cores, wherein a broadcast television channel occupies 1 core, an original low-speed data channel occupies 4 cores, and newly constructed high-speed data occupies the remaining 1 core.

Each building node covers 32 users, each building node originally places a 1X 16 optical splitter and a 1X 8 optical splitter, a 1X 4 optical splitter is newly placed for a high-speed data channel, each building node is provided with 4 cores of branch optical cables which are laid correspondingly, wherein a broadcasting television channel occupies 1 core, an original low-speed bidirectional data channel occupies 1 core, a newly built high-speed data channel occupies the 3 rd core, and the rest 1 core is used for redundancy backup.

Each user family lays a 2-core rubber-insulated-wire optical cable, 1 core in the 2-core rubber-insulated-wire optical cable of the family adopting a low-speed data channel is used for transmitting broadcast television signals and is in butt joint with a 1X 16 optical splitter, and the other 1 core is used for transmitting low-speed data signals and is in butt joint with the output of the 1X 8 optical splitter; 1 core in the household 2-core rubber-insulated-wire cable adopting the high-speed data channel is used for transmitting broadcast television signals and is in butt joint with the output of the 1X 16 optical splitter; the other 1 core is used for transmitting high-speed data signals and is in butt joint with the output of the 1X 4 optical splitter.

In the second mode, on the basis of the original hundred-megaftth network, a high-speed data channel is built by superposition of the agile optical network 10, so that the requirement of the current radio and television service for giga-switching in can be met, and meanwhile, smooth upgrading can be performed. The broadcast television channel adopts a three-level light splitting structure, the total light splitting ratio is 4×8×16=512, each 32 users are covered with one 1×16 splitter, and the access ratio of the broadcast television service is 16/32=50%. The original low-speed data channel adopts a three-level light splitting structure, the total light splitting ratio is 4×2×8=64, each 32-user covered is provided with a 1×8 light splitter, and the hundred megadata service access ratio is 8/32=25%. The newly constructed data channel adopts a three-level light splitting structure, the total light splitting ratio is 4×8×4=128, each 32 users are covered with one 1×4 light splitter, and the gigabit data service access ratio is 4/32=12.5%. The access proportion of the superimposed bidirectional data service is 37.5%, which is higher than the total user access proportion of the current broadcast and television network. If the access proportion of the gigabit data users exceeds 12.5%, only the 1X 4 optical splitter placed in the machine room is changed into the 1X 2 optical splitter, the 1X 4 optical splitter placed in the building node is updated into the 1X 8 optical splitter, the corresponding XG-PON port number is increased, and other network structures are not moved, so that the access proportion of the gigabit users can be improved to 25%; the method has the advantages that the data user has overlarge flow, the 1X 8 optical splitters placed in the machine room can be reduced to 1X 4 optical splitters, the number of corresponding XG-PON ports is increased, the total splitting ratio is reduced, the average bandwidth of the house is improved, and the flow capacity expansion is completed.

Mode three: FTTB (dvb+epon+eoc) +ftth (dvb+xg-PON), representing (broadcast television channel+first data channel) + (broadcast television channel+second data channel) two lines are combined. The structure of this mode is shown in fig. 5 below.

The mode is based on a FTTB (DVB+EPON+EOC) network, and a broadcast television channel and a low-speed data channel are reserved; the optical line terminal XG-PON board card of the bidirectional optical fiber access equipment and the redundant fiber core of the agile optical network 10 are utilized to directly build a high-speed data channel and a broadcast television FTTH channel in a superposition mode, the broadcast television FTTH channel is deployed by adopting DVB system equipment, the high-speed data channel is deployed by adopting XG-PON equipment, the high-bandwidth data service is directly accessed into the XG-PON channel, and the initial gigabit service accessibility ratio is 12.5%.

In mode three, the broadcast television network has completed FTTB construction of dvb+epon, broadcast television signals and bidirectional data signals have been transmitted to the building nodes by way of FTTB, and EOC technology is adopted from corridor to user home, and signals of two channels are mixed and transmitted to the user home through the coaxial network 67. The third amplifier 52 with 22dB output is installed in the central office in the original broadcast television channel, the output of the third amplifier 52 is connected with the 1×3 optical splitter 53 and the sixth 1×4 optical splitter 54,1 ×3 optical splitter 53 and the sixth 1×4 optical splitter 54 in a jumper type, the output of the third amplifier is directly jumped to the third ODF rack 63 corresponding to the office, the output of the third amplifier is connected with the seventh 1×8 optical splitter 59 through the third 4-core optical cable 64, the seventh 1×8 optical splitter 59 is placed at a cell node, the input and the output of the seventh 1×8 optical splitter 59 are all connected with the first outdoor optical receiver 71 through the fourth 4-core optical cable 65 in a direct-melting manner, the first outdoor optical receiver 71 is placed at a building node, the output of the first outdoor optical receiver 71 is connected with the EOC local side CBAT74, and the EOC local side CBAT74 is connected with the EOC terminal CNU70 through the coaxial network 67.

The original bidirectional data channel is deployed by adopting EPON equipment, a second EPON PON board 68 is installed in a sub-center machine room, the PON port outputs and then is connected with a seventh 1X 4 optical splitter 55 in a jumper connection mode, the seventh 1X 4 optical splitter 55 is an inserting sheet type splitter, the output of the seventh 1X 4 optical splitter is directly jumped to a corresponding third ODF frame 63 of the machine room, the output of the seventh 1X 4 optical splitter is connected with an eighth 1X 8 optical splitter 60 through a third 4-core optical cable 64, the eighth 1X 8 optical splitter 60 is placed at a cell node, the input and the output of the eighth 1X 8 optical splitter are all connected with a fourth ONU72 (EPOONNU) through a fourth 4-core optical cable 65, the fourth ONU72 is placed at a building node, and the output of the fourth ONU72 is connected with an EOC local side CBAT 74.

After the building node EOC local side CBAT74 mixes the broadcast television signal and the bidirectional data signal, the mixed broadcast television signal and the bidirectional data signal are transmitted to the EOC terminal CNU70 of the user home through the coaxial network 67. The EOC terminal CNU70 separates the broadcast television signal from the bidirectional data signal, and connects to the service terminals such as the user television and the computer, respectively.

In the third mode, the FTTH transformation is not completed in the original network, the service demands of broadcast and television users in the coverage area on high value-added, high bandwidth and the like are not vigorous, and the access ratio of the FTTH data service is not high. Therefore, an FTTH (DVB+XG-PON) network is directly built by superposition on the basis of the original network. The fourth amplifier 77 with 22dB output is newly installed in the center-splitting machine room, the fourth amplifier 77 outputs and then is connected with the eighth 1×4 optical splitter 56 in a jumper connection manner, the eighth 1×4 optical splitter 56 is a patch type splitter, the output of the eighth 1×4 optical splitter is directly jumped to the corresponding third ODF rack 63 of the machine room, the ninth 1×8 optical splitter 61 is connected with the ninth 1×8 optical splitter 61 through the original third 4-core optical cable 64, the ninth 1×8 optical splitter 61 is placed at a cell node, the input and the output of the ninth 1×8 optical splitter 61 are all connected with the third 1×16 optical splitter 76 through the original fourth 4-core optical cable 65, the third 1×16 optical splitter 76 is placed at a building node, the input and the output of the third 1×16 optical splitter 76 are all connected with the fourth house type optical receiver 73 through the fourth 2-core rubber-band cable 66, and the output signal of the fourth house type optical receiver 73 is connected with the user's home television terminal in a direct-melting manner, and the transmission of the television signal is completed.

The newly constructed bidirectional data FTTH channel is deployed by adopting XG-PON equipment, a third XG-PON board 69 is installed in a central office, after the PON port is output, the third XG-PON board 69 is connected to a ninth 1×4 optical splitter 57 in a jumper manner, the ninth 1×4 optical splitter 57 is an insert-type splitter, the output of the ninth 1×4 optical splitter is directly jumped to a third ODF rack 63 corresponding to the office, the tenth 1×8 optical splitter 62 is connected through an original third 4-core optical cable 64, the tenth 1×8 optical splitter 62 is placed at a cell node, the input and output of the tenth 1×8 optical splitter 62 are all connected with a tenth 1×4 optical splitter 58 through an original fourth 4-core optical cable 65 in a jumper manner, the tenth 1×4 optical splitter 58 is connected with a fifth ONU75 through a fourth 2-core rubber-insulated wire optical cable 66, and the output port of the fifth ONU75 is connected with a user home computer and a router corresponding to the bidirectional data signal th terminal, and the like.

Each cell node covers 256 users, each cell node originally places a 1X 8 optical splitter of a broadcast television FTTB channel and a 1X 8 optical splitter of a bidirectional data FTTB channel, a 1X 8 optical splitter is newly placed for the broadcast television FTTH channel, and a 1X 8 optical splitter is used for the bidirectional data FTTH channel, and the input and output of the splitters at the cell nodes are in a direct melting mode. The trunk optical cable laid by each cell node is 4 cores, wherein a broadcast television FTTB channel occupies 1 core, a bidirectional data FTTB channel occupies 1 core, and a newly constructed broadcast television FTTH channel and a bidirectional data FTTH channel respectively occupy the remaining 2 cores.

Each building node covers 32 households, and originally, each building node is provided with an outdoor optical receiver, an EPONNU and an EOC local side CBAT, and is newly provided with a 1X 16 optical splitter for a broadcast television FTTH channel and a 1X 4 optical splitter for a bidirectional data FTTH channel. Each building node has 4 cores of branch optical cables which are laid correspondingly, wherein a broadcast television FTTB channel occupies 1 core, a bidirectional data FTTH channel occupies 1 core, and a newly built broadcast television FTTH channel and a bidirectional data FTTH channel respectively occupy the rest 2 cores.

Each user family in the upgrade network lays a household 2-core rubber-insulated-wire cable, and the 1 core is used for transmitting the broadcast television FTTH signal and is in butt joint with the output of the 1X 16 optical splitter; and the other 1 core is used for transmitting bidirectional data FTTH signals and is in butt joint with the output of the 1X 4 optical splitter when carrying high-speed data service.

In the third mode, on the basis of the original FTTB network, an FTTH (DVB+XG-PON) network is built in a superposition mode, so that the requirement of kilomega service can be met, and meanwhile, smooth upgrading can be performed. The newly constructed broadcast television FTTH channel adopts a three-level light splitting structure, the total light splitting ratio is 4×8×16=512, a 1×16 splitter is arranged for each 32 covered users, and the access ratio of the broadcast television service is 16/32=50%. The newly constructed data FTTH channel adopts a three-level light splitting structure, the total light splitting ratio is 4×8×4=128, each 32 users are covered with a 1×4 optical splitter, and the gigabit data service access ratio is 4/32=12.5%. If the access proportion of the gigabit data users exceeds 12.5%, only the 1X 4 optical splitter placed in the sub-center machine room is required to be changed into the 1X 2 optical splitter, the 1X 4 optical splitter placed in the building node is updated into the 1X 8 optical splitter, the corresponding XG-PON port number is increased, other network structures are not moved, and the access proportion of the gigabit users can be conveniently and rapidly increased to 25%; the method has the advantages that the data users have overlarge flow, the 1X 4 optical splitters placed in the machine room can be reduced to 1X 2 optical splitters, the number of corresponding XG-PON ports is increased, the total splitting ratio is reduced, the average bandwidth of the house is improved, and the flow capacity expansion is realized.

Mode four: FTTH (dvb+epon+xg-PON) +fttb (DVB), stands for (broadcast television channel+first data channel+second data channel) +broadcast television channel. The structure of this mode is shown in fig. 6 below.

The mode reserves a broadcast television channel and a low-speed data channel of the original FTTH on the basis of the FTTB+FTTH mixed hundred megafibers access network; the data channel of the original FTTB is upgraded and modified into a high-speed data channel by utilizing an optical line terminal XG-PON board card of the bidirectional optical fiber access equipment and cutting and connecting with the original FTTB agile optical network 10. The access proportion of the gigabit FTTH service is 12.5% at the initial stage while the structure of the agile optical network 10 is not changed greatly, so that the requirement of the radio and television network for gigabit optical fiber home-entry is met.

In the fourth mode, the broadcast television network has completed the upgrading of the FTTH (DVB+EPON) network on the basis of the FTTB (DVB+EPON), and the improvement of the hundred-megafiber home network is basically realized. In order to ensure hundred meganetwork access and improve network gigabit access capability, the original FTTB (dvb+epon) needs to be modified, the EPON PON board 68 is replaced and upgraded to an XG-PONPON board 93, the fourth ONU72 and the EOC local side CBAT74 are removed, and the EOC terminal CNU70 in the user home is directly replaced by the set-top box 88, so that the FTTB (DVB) +ftth (dvb+xg-PON) network is upgraded.

The broadcast television FTTB channel adopts partial original equipment deployment, a third amplifier 52 with 22dB output is installed in a branch center machine room, the third amplifier 52 outputs and then is connected with a 1X 3 optical splitter 53 and a sixth 1X 4 optical splitter 54,1X 3 optical splitter 53 in a jumper connection mode, the sixth 1X 4 optical splitter 54 is a plug-in type splitter, the output of the third amplifier is directly jumped to a third ODF frame 63 corresponding to the machine room, the third amplifier is connected with a seventh 1X 8 optical splitter 59 through a third 4-core optical cable 64, the seventh 1X 8 optical splitter 59 is placed at a cell node, the input and the output of the seventh amplifier are all connected with a first outdoor optical receiver 71 in a direct melting mode, the first outdoor optical receiver 71 is placed at a building node, the first outdoor optical receiver 71 is connected with a set top box 88 through a coaxial network 67, and the output signal of the set top box 88 is connected with a home television terminal of a user, and the transmission of broadcast television signals is completed.

The FTTH (dvb+xg-PON) is deployed by adopting XG-PON equipment and a part of original equipment, a fourth XG-PON board 93 is newly installed in a central office, after the PON port is output, the seventh 1×4 optical splitter 55 is connected in a jumper manner, the seventh 1×4 optical splitter 55 is a patch splitter, the output of the seventh 1×4 optical splitter is directly jumped to a third ODF rack 63 corresponding to the office, the output of the seventh 1×4 optical splitter is connected with an eighth 1×8 optical splitter 60 through a third 4-core optical cable 64, the eighth 1×8 optical splitter 60 is placed at a cell node, the input and output of the eighth 1×8 optical splitter 60 are all connected with a twelfth 1×4 optical splitter 89 through a fourth 4-core optical cable 65, the twelfth 1×4 optical splitter 89 is placed at a building node, and the output of the twelfth 1×4 optical splitter 89 is connected with a seventh ONU91 through a sixth 2-core rubber-covered wire optical cable 90.

In mode four, the original network has completed FTTH (dvb+epon) adaptation, and broadcast television signals and bi-directional data signals have been transmitted to the user's home by way of FTTH. In the original broadcast television FTTH channel, a fifth amplifier 78 with 22dB output is installed in a split center machine room, the fifth amplifier 78 is connected with an eleventh 1×4 optical splitter 79 in a jumper connection mode after output, the eleventh 1×4 optical splitter 79 is a plug-in type splitter, the output of the eleventh 1×4 optical splitter is directly jumped to a corresponding third ODF frame 63 of the machine room, the eleventh 1×8 optical splitter 80 is connected with the eleventh 1×8 optical splitter 80 through a third 4-core optical cable 64, the eleventh 1×8 optical splitter 80 is placed at a cell node, the input and the output of the eleventh 1×8 optical splitter 80 are all connected with a fourth 1×16 optical splitter 81 through a fourth 4-core optical cable 65, the fourth 1×16 optical splitter 81 is placed at a building node, the input and the output of the fourth 1×16 optical splitter 81 are all in a jumper connection mode, the fourth 1×16 optical splitter 81 is respectively and correspondingly connected with a fifth in-type optical receiver 82 and a sixth in-type household optical receiver 83 through a sixth 2-core rubber cable 90 and a fifth 2-core rubber cable 86, the fifth in-type television receiver 83 is connected with a television signal in-type television-home television-user terminal 83, and the television-in-type television-user terminal is finished.

The original bidirectional data FTTH channel is deployed by EPON equipment, a third EPON pon board 92 is installed in a central office, pon port outputs are directly jumped to a third ODF rack 63 corresponding to the office, the third EPON pon board is connected to a twelfth 1×8 optical splitter 84 through a third 4-core optical cable 64, the twelfth 1×8 optical splitter 84 is placed at a cell node, its input and output are all in a direct-melting mode, the twelfth 1×8 optical splitter 84 is connected to a thirteenth 1×8 optical splitter 85 through a fourth 4-core optical cable 65, the thirteenth 1×8 optical splitter 85 is placed at a building node, its input and output are all in a jumped connection mode, the thirteenth 1×8 optical splitter 85 is connected to a sixth ONU87 (epono) through a fifth 2-core rubber-covered wire optical cable 86, and an output port of the sixth ONU87 is connected to a user home computer, a router and other data terminal, so as to complete transmission of original bidirectional data FTTH signals.

Each cell node covers 256 users, and each cell node originally places a 1X 8 optical splitter for a broadcast television FTTB channel, a 1X 8 optical splitter for a bidirectional data FTTB channel, a 1X 8 optical splitter for a broadcast television FTTH channel and a 1X 8 optical splitter for a bidirectional data FTTH channel, and the 1X 8 optical splitter after upgrading and reconstruction is directly used for a bidirectional data FTTH high-speed channel. The input and output of the splitter at the cell node are in direct melting mode. The trunk optical cable laid by each cell node is 4 cores, wherein a broadcast television FTTB channel occupies 1 core, a bidirectional data FTTH high-speed channel occupies 1 core, and a broadcast television FTTH channel and a bidirectional data FTTH low-speed channel respectively occupy the remaining 2 cores.

Each building node covers 32 households, three optical splitters are arranged on each building node after network upgrading and transformation, one 1X 4 optical splitter is used for a bidirectional data FTTH high-speed channel, one 1X 16 optical splitter is used for a broadcast television FTTH channel, and one 1X 8 optical splitter is used for a bidirectional data FTTH low-speed channel. The branch optical cable laid on each building node of the corridor is 4 cores, wherein a broadcast television FTTB channel occupies 1 core, a bidirectional data FTTH high-speed channel occupies 1 core, and a broadcast television FTTH channel and a bidirectional data FTTH low-speed channel respectively occupy the remaining 2 cores.

Each user lays a household 2-core rubber-insulated-wire cable, and 1 core is used for transmitting broadcast television signals and is in butt joint with the output of the 1X 16 optical splitter. The other 1 core of the 2-core rubber-insulated-wire cable is used for transmitting bidirectional data signals, and is butted with the output of the 1X 8 optical splitter if the data service is carried by less than 500M, and is butted with the output of the 1X 4 optical splitter if the data service is carried by more than or equal to 500M.

In the fourth mode, on the basis of the original fttb+ftth hybrid agile optical network 10, a bidirectional network FTTH high-speed channel is upgraded and modified, so that the requirement of kilomega service in the scene can be met, and smooth upgrading can be performed. The original built bidirectional data FTTH low-speed channel adopts a two-stage light splitting structure, the total light splitting ratio is 8 multiplied by 8=64, each 32 covered users are provided with a 1 multiplied by 8 light splitter, and the hundred megadata service access ratio is 8/32=25%. Newly-established data FTTH high-speed channel adopts three-level light splitting structure, total light splitting ratio is 4×8×4=128, each 32 covered users is provided with a 1×4 optical splitter, and gigabit data service access ratio is 4/32=12.5%. The fiber access proportion after superposition is 37.5%, and the requirements of the development of the FTTH fiber optic service of the broadcast and television network in recent years can be met. If the access proportion of the gigabit data users exceeds 12.5%, only the 1X 4 optical splitter placed in the machine room is changed into the 1X 2 optical splitter, the 1X 4 optical splitter placed in the building node is updated into the 1X 8 optical splitter, the corresponding XG-PON port number is increased, other network structures are not moved, and the access proportion of the gigabit users can be conveniently and rapidly increased to 25%; the method has the advantages that the data users have overlarge flow, the 1X 4 optical splitters placed in the machine room can be reduced to 1X 2 optical splitters, the number of corresponding XG-PON ports is increased, the average bandwidth of the users is improved, and the flow capacity expansion is realized.

The utility model has the beneficial effects that:

on the basis of the existing DVB, EPON, EOC network, an agile optical network and an XG-PON technology are introduced, an EPON low-speed bidirectional data channel is modified on the premise of retaining a broadcast digital television DVB channel, and an XG-PON high-speed bidirectional data channel is established, so that an optical fiber to the home gigabit network is built or upgraded in four different modes according to different application scenes, and a broadcast and television bidirectional network gigabit optical fiber access system with high bandwidth, low cost and smooth upgrading is formed. The system can realize the gigabit access capability of the optical fiber network on the basis of the current broadcast and television bidirectional network, and is suitable for implementing new construction, modification and upgrading engineering of the broadcast and television bidirectional network optical fiber access system.

The radio and television bidirectional network gigabit optical fiber access system has the characteristics of stable structure and smooth upgrading, establishes various hybrid system networking on the basis of an agile optical network, gradually eliminates old and lagged systems and equipment according to the development of services, keeps the whole network structure unchanged, and particularly does not carry out line laying again, can upgrade equipment in a machine room and change an optical splitter, uses the services as driving and updating to replace user terminal equipment, and can realize seamless smooth upgrading of the network so as to meet the requirements of full-optical fiber, high bandwidth and intellectualization of the next-generation cable television access network.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the system of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims (8)

1. A broadcast television bi-directional network gigabit fiber access system, the access system comprising: a broadcast network module and an agile optical network; the agile optical network comprises an optical splitter set; the optical splitter set includes: the first group of optical splitters, the second group of optical splitters and the third group of optical splitters;

the broadcast network module is arranged between the signal source and the user terminal; the broadcast network module includes: broadcast television equipment and two-way optical fiber access equipment;

The broadcast television apparatus includes an amplifier and a broadcast television terminal; the amplifier and the broadcast television terminal are connected through the first group of optical splitters;

the bidirectional optical fiber access device includes: an optical line signal source and an output unit; the optical line signal source comprises a first signal source and a second signal source; the output unit comprises a first data output unit and a second data output unit; the first signal source and the first data output unit are connected through the second group of optical splitters; the second signal source and the second data output unit are connected through the third group of optical splitters;

the amplifier, the broadcast television terminal and the first group of optical splitters form a broadcast television channel; the first signal source, the first data output unit and the second group of optical splitters form a first data channel; the second signal source, the second data output unit and the third group of optical splitters form a second data channel; the data processing rates of the first data channel and the second data channel are different.

2. The broadcast television bi-directional network gigabit optical fiber access system of claim 1, wherein the first signal source comprises an EPON board; the second signal source comprises an XG-PON board card.

3. The bi-directional network gigabit optical fiber access system of claim 1, wherein the amplifier and the broadcast television terminal are each connected to the first set of optical splitters by an optical cable; the first signal source and the first data output unit are connected with the second group of optical splitters through optical cables; the second signal source and the second data output unit are both connected with the third group of optical splitters through optical cables.

4. The broadcast television bi-directional network gigabit optical fiber access system of claim 3, wherein the agile optical network further comprises: an optical distribution frame; the optical distribution frame is used for clamping the optical cable.

5. The bi-directional network gigabit optical fiber access system of broadcast television of claim 1, wherein said agile optical network employs a three-stage optical splitting architecture.

6. The bi-directional network gigabit optical fiber access system of claim 1, wherein said first set of optical splitters comprises at least one optical splitter; the second group of optical splitters at least comprises one optical splitter; the third group of optical splitters comprises at least one optical splitter.

7. The bi-directional network gigabit optical fiber access system of claim 6, wherein the optical splitter is a patch or box type structure.

8. The bi-directional network gigabit optical fiber access system of claim 7, wherein when the optical splitter is of a plug-in type structure, the optical splitter is connected by means of flange jumper connection; when the optical branching device is of a box type structure, the optical branching device is connected in a direct melting mode.