CN206894672U - 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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- CN206894672U CN206894672U CN201720736997.6U CN201720736997U CN206894672U CN 206894672 U CN206894672 U CN 206894672U CN 201720736997 U CN201720736997 U CN 201720736997U CN 206894672 U CN206894672 U CN 206894672U
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- 239000000835 fiber Substances 0.000 title claims abstract description 30
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 16
- 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 15
- 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
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Abstract
The utility model 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 and 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 signal mixed allocation that CATV electric signals and the CLT transmission of reception come 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 provide high performance-price ratio infrastructure network construction and sustainable development needs.
Description
Technical field
It the utility model is related to network communication technology field, and in particular to a kind of fiber optic cables hybrid passive network channel is certainly
Adapt to 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 rise 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 1.25G, spirit is disposed using EPON (Passive Optical Network, PON) technology
Living, cost gradually reduces, and turns into the major way of the fixed broadband access of 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 same without playing according to the fiber-to-the-home construction investments of FTTH
The wideband transmission medium resource that shaft cable is registered one's residence, the development broadband access of broadcasting and TV cable television network are encountered by puzzlement, and two-way HFC is symmetrical
Broadband communications technologies are urgently to be resolved hurrily.
Utility model content
In order to solve the above technical problems, the utility model proposes a kind of fiber optic cables hybrid passive network channel is adaptive
Reception system, symmetrical broadband data communication is provided to be reached for Bidirectional HFC Network, can be that the bidirectional rebuilding of cable TV network reaches
To 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 are 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 individually connects, and the cable system distributor connects at least one CNU.
As preferable, the ONU is connected with CLT by EPON, and the ONU carries 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 is connected at least one by coaxial cable
CNU。
As preferable, 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 preferable, the OLT is connected with optical splitter, and the optical splitter is individually connected with several HFCPON local sides.
As preferable, 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 that bi-directional symmetrical data communicate 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 preferable, the HFCPON local sides use CLT multichannel modules, establish data with multiple CNU terminals and communicate,
The local side apparatus of all HFCPON technologies of CNU terminal adaptations.
As preferable, the CLT modules have the administrative mechanism of optimization equalization channel, and its administrative mechanism can use T
Cycle optimizes equilibrating mechanism, can also use arrangement equilibrating mechanism, can also optimize equilibrating mechanism using the T cycles and arrangement is balanced
Mechanism is alternately implemented, and after any CNU receives the instruction of CLT channel distributions, working channel can be switched into distribution and specify channel.
As preferable, 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 the mechanism received and channel loading is balanced.
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 required accompanying drawing used 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, do not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that the HFCPON that the application provides builds point-to-multipoint broadband access system topological diagram；
Fig. 2 is the HFCPON local sides principle and high-level schematic functional block diagram that the application provides；
Fig. 3 is the HFCPON system signal schematic flow sheets that the application provides；
Fig. 4 is the CNU terminal Principle of Communication block diagrams that the application provides；
Fig. 5 be CLT multichannels module and the CNU terminals that the application provides establish/exit communication steps；
Fig. 6 is the channel equalization flow chart that the application provides.
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.It is common based on the embodiment in the application, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, it should all belong to the application protection
Scope.
The utility model is a kind of HFCPON photoelectricity mixed channel adaptive receiving system, is provided symmetrically for Bidirectional HFC Network
Broadband data communication, can be that the bidirectional rebuilding of cable TV network reaches FTTH performance requirement.
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, the data transfer signal of light is converted into gigabit Ethernet data-signal.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
Transmitted in the frequency specified through carrier frequency by the planning of coaxial cable frequency spectrum, 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 reach 5bit/Hz data rate performances, CATV is wide
Electric cable television network, cable distributor are used to distribute CLT module multichannel data signals and CATV mixed signal, CNU modules
For receiving the mixed signal of 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 formed, uplink/downlink data bandwidth is symmetrical, and optical cable and cable MAC use TDMA
Mode of operation, ensure efficient data transmission performance, while be mixed into cable television CATV signals and transmit together to CNU.
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 matches completely with cable transmission speed, realizes matching of the OLT optical ports to CNU cableports.
Wherein, for CLT modules communicate with the point-to-multipoint data of CNU terminals, CLT multichannels module, channel are excellent
Change equilibrating mechanism, channel switching is all the upgrading that can ensure above to adapt to HFCPON total capacities in application.
Wherein, CLT multichannels module has k x 320Mbps total bandwidth capacity (k is the number of channel), whole with multiple CNU
Data communication is established at end, and CNU terminals have the function that automatic search frequency locking receives, can be in any letter of selection in k channel
Road establishes 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 maximizes.
2. when CNU only exists idle channel, the arrangement equilibrating mechanism sent is lined up using channels broadcast signaling, that is, is lined up
The broadcast signaling of idle channel is sent, CNU is only established 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, using the T cycles optimize equilibrating mechanism can ensure terminal quickly establish communication after re-optimization, improve terminal on linear velocity；
When a small amount of terminal CNU it is random reach the standard grade or it is offline, 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, possesses the channel handoff functionality of controlled CLT modules control.
Wherein, CNU terminals are passed through using channel self-adapting and CLT multichannel module load-balancing mechanisms, CNU terminals
The automatic search locks of Tuner are believed that any one communication channel of module is established with CLT more and communicated, according to CLT multichannel modules
Load balancing control instruction changes the working channels of CNU terminals and obtains maximum bandwidth to reach CNU terminals and be that each channel accounts 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)
- A kind of 1. 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, and the gigabit data exchange backboard is connected with least one electricity Cable line terminal, the cable run terminal are 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 also distributes with the CATV and cable system Device individually connects, 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 that bi-directional symmetrical data communicate 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 State hybrid fiber cable passive network local side and use cable run terminal multichannel module, the cable run terminal and multiple electricity Cable NE terminal establishes 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, arrangement equilibrating mechanism can also be used, equilibrating mechanism can also be optimized using the T cycles and arrangement equilibrating mechanism is alternately real Apply, after any cable system unit receives the distribution instruction of cable run terminal channel, working channel can be switched distribution and 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 the mechanism of frequency adaptive reception and channel loading equilibrium.
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| CN201720736997.6U CN206894672U (en) | 2017-06-23 | 2017-06-23 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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| CN201720736997.6U CN206894672U (en) | 2017-06-23 | 2017-06-23 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276860A (en) * | 2017-06-23 | 2017-10-20 | 浙江核聚通信技术有限公司 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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| CN107276860A (en) * | 2017-06-23 | 2017-10-20 | 浙江核聚通信技术有限公司 | Fiber optic cables hybrid passive network channel adaptive receiving system |
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Address after: 310013 room 4, room 4, No. 333, Lianhua street, Xihu District, Xihu District, Zhejiang Patentee after: ZHEJIANG HEJU INTELLIGENT TECHNOLOGY CO.,LTD. Address before: 310013 room 4, room 4, No. 333, Lianhua street, Xihu District, Xihu District, Zhejiang Patentee before: ZHEJIANG HEJU COMMUNICATION TECHNOLOGY CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 |