CN107276860A - Fiber optic cables hybrid passive network channel adaptive receiving system - Google Patents
Fiber optic cables hybrid passive network channel adaptive receiving system Download PDFInfo
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- CN107276860A CN107276860A CN201710484500.0A CN201710484500A CN107276860A CN 107276860 A CN107276860 A CN 107276860A CN 201710484500 A CN201710484500 A CN 201710484500A CN 107276860 A CN107276860 A CN 107276860A
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- 239000000835 fiber Substances 0.000 title claims abstract description 30
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims description 12
- 230000006855 networking Effects 0.000 claims description 5
- 238000005457 optimization Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000010397 one-hybrid screening Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 239000013307 optical fiber Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
- H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
- H04L12/2885—Arrangements interfacing with optical systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6118—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving cable transmission, e.g. using a cable modem
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
- H04N21/6168—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving cable transmission, e.g. using a cable modem
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of fiber optic cables hybrid passive network channel adaptive receiving system, the system includes：Hybrid fiber cable passive network HFCPON local sides, the HFCPON local sides are integrated ONU with cable run terminal CLT at optical fiber with cable distribution network tandem node, receive OLT by PON transmission come optical signal to ONU, N block CLT modules are linked using gigabit data exchange bus backplane, by the next signal mixed allocation of CATV electric signals and the CLT transmission of reception to CNU, realize OLT to terminal CNU point-to-multipoint data communication, the PHY layer of data communication is using optical fiber and cable compounded link, MAC layer uses TDMA mode of operations, there is control to the terminal device of optical link and cable link, management, the functions such as ranging, effective management communication mechanism and efficiency, improve message transmission rate, solve the symmetrical broadband data communications of two-way HFC, for broadcasting and TV+internet business the infrastructure network construction and sustainable development of high performance-price ratio are provided the need for.
Description
Technical field
The present invention relates to network communication technology field, and in particular to a kind of fiber optic cables hybrid passive network channel is adaptive
Reception system.
Background technology
With the development that the integration of three networks of IP broadbands is applied, the especially interface applications such as internet video/TV, video social activity
The bandwidth demand increase of networking, home broadband access bandwidth rises to 20-50M, the telecommunications for starting China in 2010 from 2M bandwidth
Operator implements fiber to the home (Fiber To The Home, FTTH) broadband access development strategy, takes extensive investment
Build the broadband access network upgrading for carrying out urban subscriber.FTTH is to employ ethernet passive optical network (Ethernet
Passive Optical Network, EPON/10EPON) or Gigabit Passive Optical Network (Gigabit-Capable Passive
Optical Network, GPON) technology and equipment realizes fiber-to-the-home broadband access network, EPON system uses up-downgoing pair
Claim transmission, nominal rate is 1.25G, spirit is disposed using EPON (Passive Optical Network, PON) technology
Living, cost is gradually reduced, the major way of the fixed broadband access as current telecommunications operator.
Hybrid fiber coax (Hybrid Fiber are used for broadcasting and TV cable television operators cable television network
Cable, HFC) registered one's residence with net shaft cable, the difficult point for realizing symmetrical broadband access is presently, there are, broadband uses wire cable number
According to service interface specification (Data Over Cable Service Interface Specifications, DOCSIS) technology or
Coaxial Ethernet (Ethernet Over Cable, EOC) technology can not all solve the transmission of up-downgoing symmetric data or Bandwidth Dynamic
Distribution, limits data broadband service application.It is both uneconomical or do not play same according to the fiber-to-the-home construction investments of FTTH
The wideband transmission medium resource that shaft cable is registered one's residence, broadcasting and TV cable television network development broadband access is encountered by puzzlement, and two-way HFC is symmetrical
Broadband communications technologies are urgently to be resolved hurrily.
The content of the invention
In order to solve the above technical problems, the present invention proposes a kind of fiber optic cables hybrid passive network channel adaptive reception
System, symmetrical broadband data communication is provided to be reached for Bidirectional HFC Network, can be reached for the bidirectional rebuilding of cable TV network
The purpose of FTTH performance requirement.
A kind of fiber optic cables hybrid passive network channel adaptive receiving system, includes optical line terminal (Optical
Line Terminal, OLT), the OLT is connected with least one hybrid fiber cable passive network (HFC PON, HFCPON)
Local side, the HFCPON local sides are connected with CATV and cable system distributor, and the cable system distributor connects at least one cable
NE (Cable Network Unit, CNU)；
The HFCPON local sides include optical network unit (Optical Network Unit, ONU), the ONU and OLT
Connection, the ONU is connected with gigabit data exchange backboard, and the gigabit data exchange backboard is connected with least one cable run
Terminal (Cable Line Terminal, CLT), the CLT is also associated with radiofrequency signal mixing distributor, the radiofrequency signal
Mixing distributor is individually connected with the CLT, and the radiofrequency signal mixing distributor also divides with the CATV and cable system
Orchestration is individually connected, and the cable system distributor connects at least one CNU.
As preferred, the ONU is connected with CLT by EPON, and the ONU is carried on the back with the gigabit data exchange
Plate is connected by gigabit networking, and the gigabit data exchange backboard is connected with the cable run terminal by gigabit networking, institute
State CLT to be connected by coaxial cable with the radiofrequency signal mixing distributor, the radiofrequency signal mixing distributor passes through coaxial
Cable is connected with the CATV and cable system distributor respectively, and the cable system distributor connects at least one by coaxial cable
CNU。
It is used as preferred, media access control layer (the Media Access of the EPON and coaxial cable
Control, MAC) using the mode of operation of time division multiple acess (Time Division Multiple Access, TDMA).
As preferred, the OLT is connected with optical splitter, and the optical splitter is individually connected with several HFCPON local sides.
As preferred, the CLT is the local side module of passive cable system, and the OLT passes through PON ports to HFCPON
Local side apparatus arrives CNU and realizes bi-directional symmetrical data communication again, and gigabit Ethernet data-signal is used orthogonal frequency division multiplexing by the CLT
Turn into electric signal with technology baseband modulation, electric signal is again through carrier transmission.
As preferred, the HFCPON local sides use CLT multichannel modules, and data communication is set up with multiple CNU terminals,
The local side apparatus of all HFCPON technologies of CNU terminal adaptations.
As preferred, the CLT modules have the administrative mechanism of optimization equalization channel, and its administrative mechanism can use T
Cycle optimizes equilibrating mechanism, it would however also be possible to employ arrangement equilibrating mechanism, can also optimize equilibrating mechanism using the T cycles and arrangement is balanced
Mechanism is alternately implemented, and any CNU is received after the instruction of CLT channel distributions, working channel switching distribution can be specified into channel.
It is used as preferred, data mixing signal of the CNU modules for receiving CLT data-signals and cable television, number
According to mixed signal through diplexer separates CATV signal extraction CLT module multichannel data signals, the CNU modules have frequency certainly
Adapt to reception and channel loading mechanism in a balanced way.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, are not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 builds point-to-multipoint broadband access system topological diagram for the HFCPON that the application is provided；
HFCPON local sides principle and high-level schematic functional block diagram that Fig. 2 provides for the application；
The HFCPON system signal schematic flow sheets that Fig. 3 provides for the application；
The CNU terminal communication theory diagrams that Fig. 4 provides for the application；
The CLT multichannels module that Fig. 5 is provided for the application and CNU terminals set up/exit communication steps；
The channel equalization flow chart that Fig. 6 provides for the application.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, it is real below in conjunction with the application
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to the application protection
Scope.
The present invention is a kind of HFCPON photoelectricity mixed channel adaptive receiving system, and symmetrical broadband is provided for Bidirectional HFC Network
Data communication, can reach FTTH performance requirement for the bidirectional rebuilding of cable TV network.
As shown in figs 1 to 6, a kind of fiber optic cables hybrid passive network channel adaptive receiving system, include OLT,
ONU modules, gigabit data exchange backboard, CLT modules, CATV, cable system distributor and CNU modules；
Wherein, OLT is optical signal output equipment, and ONU modules are EPON optical network units, it then follows EPON IEEE
802.3ah standards, gigabit Ethernet data-signal is converted to by the data transfer signal of light.CLT modules are passive cable systems
Local side module, by gigabit Ethernet data-signal using OFDM modes baseband modulation turn into certain spectrum width signal, then
Plan and transmitted in the frequency specified by coaxial cable frequency spectrum through carrier frequency, CLT module high bandwidth transmission performances are by following 4 key elements
Determine：Frequency spectrum resource, OFDM modulation techniques, TDD+TDMA mode of operations and 5bit/Hz data rate performances are reached, CATV is wide
Electric cable television network, cable distributor is used to distribute CLT module multichannel data signals and CATV mixed signal, CNU modules
Mixed signal for receiving multichannel data signal and CATV.
The workflow of the system is as follows：
Optical signals OLT device PON ports are transmitted through the fiber to optical splitter, then are transmitted by optical splitter to HFCPON local sides
ONU modules, then carry out opto-electronic conversion through HFCPON local sides, then multiple CNU access terminals are connected by coaxial cable distribution net,
The point-to-multipoint broadband access of OLT to CNU is constituted, uplink/downlink data bandwidth is symmetrical, optical cable and cable MAC use TDMA
Mode of operation, it is ensured that efficient data transmission performance, is transmitted to CNU together while being mixed into cable television CATV signals.
With 2.5GEPON bandwidth, 4 pieces of 640Mbps of configuration OLT modules, exemplified by 50 families of optical node covering：
The PON ports of optical signals OLT device, which are sent, is transmitted through the fiber to ONU modules, now the uplink/downlink band of optical fiber
The data transfer signal of light is converted to gigabit Ethernet data-signal by wide 1.25G/1.25G, ONU module, and through gigabit data
Switching backplane sends CLT modules to, and gigabit Ethernet data-signal is converted to electric signal by CLT modules, and in this electric signal
It is mixed into after CATV and CNU is sent to by cable, now a width of 1.28G/1.28G of uplink/downlink band of the cable, it follows that light
Transmission rate is matched completely with cable transmission speed, realizes OLT optical ports to the matching of CNU cableports.
Wherein, for the point-to-multipoint data communication of CLT modules and CNU terminals, CLT multichannels module, channel are excellent
It is all the upgrading that can ensure above to adapt to HFCPON total capacities in application to change equilibrating mechanism, channel switching.
Wherein, CLT multichannels module has k x 320Mbps total bandwidth capacity (k is the number of channel), whole with multiple CNU
Data communication is set up at end, and CNU terminals have the function that automatic search frequency locking is received, any letter of selection that can be in k channel
Road sets up communication and completes endpoint registration, the local side apparatus of all HFCPON technologies of CNU terminal adaptations.
Wherein, above-mentioned optimization equilibrating mechanism is specific as follows：
1. working as, terminal CNU reaches the standard grade or offline dynamic changes the number of terminals of each channel and causes the load of channel unbalanced, adopts
Optimize equilibrating mechanism with the T cycles, it is ensured that CNU channel widths resource utilization is maximized.
2. when CNU only exists idle channel, the arrangement equilibrating mechanism sent of being queued up using channels broadcast signaling is queued up
The broadcast signaling of idle channel is sent, CNU only sets up with CLT in idle channel and communicated, and channel is possessed balanced number of terminals and accounted for all the time
With.
3. the combination of the optimization equilibrating mechanism and arrangement equilibrating mechanism using channel, almost reaches the standard grade simultaneously as terminal CNU
When, optimizing equilibrating mechanism using the T cycles can ensure that terminal quickly sets up re-optimization after communication, improve linear velocity in terminal；
When a small amount of terminal CNU reaching the standard grade or offline at random, the channel equalization efficiency using arrangement equilibrating mechanism is optimal.
Wherein, CLT modules can redistribute specified channel to any CNU terminals, and CNU receives the instruction of CLT channel distributions
Afterwards, channel is specified in the distribution that can switch working channel, the channel handoff functionality for possessing controlled CLT modules control.
Wherein, CNU terminals are using channel self-adapting and CLT multichannel module load-balancing mechanisms, and CNU terminals pass through
Believing that any one communication channel foundation of module communicates the automatic search locks of Tuner and CLT, according to CLT multichannel modules more
Load balancing control instruction changes the working channel of CNU terminals to reach that CNU terminals obtain maximum bandwidth and be that each channel is accounted for again
The peak use rate of number of terminals equalization or channel width.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application have it is many deformation and
Change is without departing from spirit herein, it is desirable to which appended claim includes these deformations and changed without departing from the application's
Spirit.
Claims (8)
1. a kind of fiber optic cables hybrid passive network channel adaptive receiving system, it is characterised in that include optical line terminal,
The optical line terminal is connected with least one hybrid fiber cable passive network local side, the hybrid fiber cable passive network
Local side is connected with CATV and cable system distributor, and the cable system distributor connects at least one cable system unit；
The hybrid fiber cable passive network local side includes optical network unit, and the optical network unit connects with optical line terminal
Connect, the optical network unit is connected with gigabit data exchange backboard, the gigabit data exchange backboard is connected with least one electricity
Cable line terminal, the cable run terminal is also associated with radiofrequency signal mixing distributor, the radiofrequency signal mixing distributor
Individually it is connected with the cable run terminal, the radiofrequency signal mixing distributor is also distributed with the CATV and cable system
Device is individually connected, and the cable system distributor connects at least one cable system unit.
2. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
State optical network unit to be connected by EPON with optical line terminal, the optical network unit is carried on the back with the gigabit data exchange
Plate is connected by gigabit networking, and the gigabit data exchange backboard is connected with the cable run terminal by gigabit networking, institute
State cable run terminal to be connected by coaxial cable with the radiofrequency signal mixing distributor, the radiofrequency signal mixing distributor
It is connected respectively with the CATV and cable system distributor by coaxial cable, the cable system distributor is connected by coaxial cable
At least one cable system unit.
3. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 2, it is characterised in that institute
The media access control layer of EPON and coaxial cable is stated using the mode of operation of time division multiple acess.
4. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
State optical line terminal and be connected with optical splitter, the optical splitter is individually connected with several hybrid fiber cable passive network local sides.
5. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
The local side module that cable run terminal is passive cable system is stated, the optical line terminal passes through EPON to hybrid fiber
Cable passive network local side apparatus arrives cable system unit and realizes bi-directional symmetrical data communication again, and the cable run terminal is by thousand
Mbit ethernet data-signal turns into electric signal using orthogonal frequency division multiplexi baseband modulation, and electric signal is again through carrier transmission.
6. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
Hybrid fiber cable passive network local side is stated using cable run terminal multichannel module, the cable run terminal and multiple electricity
Cable NE terminal sets up data communication, all hybrid fiber cable passive network technologies of cable system unit terminal adaptation
Local side apparatus.
7. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
Stating cable run terminal module has the administrative mechanism of optimization equalization channel, and its administrative mechanism can optimize equilibrium using the T cycles
Mechanism, it would however also be possible to employ arrangement equilibrating mechanism, can also optimize equilibrating mechanism using the T cycles and arrangement equilibrating mechanism is alternately real
Apply, any cable system unit is received after the distribution instruction of cable run terminal channel, working channel switching distribution can be specified
Channel.
8. fiber optic cables hybrid passive network channel adaptive receiving system according to claim 1, it is characterised in that institute
The data mixing signal that cable system unit module is used to receive cable run terminal data signal and cable television is stated, data are mixed
Signal is closed through diplexer separates CATV signal extraction cable run terminal module multichannel data signals, the cable system unit
Module has frequency adaptive reception and channel loading mechanism in a balanced way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710484500.0A CN107276860A (en) | 2017-06-23 | 2017-06-23 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710484500.0A CN107276860A (en) | 2017-06-23 | 2017-06-23 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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| CN201710484500.0A Pending CN107276860A (en) | 2017-06-23 | 2017-06-23 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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Cited By (3)
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| CN110891006A (en) * | 2019-12-24 | 2020-03-17 | 成都康特电子科技股份有限公司 | HINOC communication method, HINOC communication device, HINOC communication equipment and computer readable storage medium |
| WO2021254232A1 (en) * | 2020-06-15 | 2021-12-23 | 中兴通讯股份有限公司 | Data carrying method and device for passive optical network, olt, and storage medium |
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| CN110891006A (en) * | 2019-12-24 | 2020-03-17 | 成都康特电子科技股份有限公司 | HINOC communication method, HINOC communication device, HINOC communication equipment and computer readable storage medium |
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