CN103001698B - Optical transmission system - Google Patents
Optical transmission system Download PDFInfo
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- CN103001698B CN103001698B CN201210375943.3A CN201210375943A CN103001698B CN 103001698 B CN103001698 B CN 103001698B CN 201210375943 A CN201210375943 A CN 201210375943A CN 103001698 B CN103001698 B CN 103001698B
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Abstract
According to an embodiment of the invention, there is provided a kind of optical transmission system, it includes optical sender, several photoreceivers and the optical fiber of the connection optical sender and photoreceiver, wherein：The optical fiber is with the broadcast audio, video data of 1Gb or more speed one-way transmission IP data packet forms；And each photoreceiver is realized by the unidirectional optical module for only receiving optical signal, for receiving the broadcast audio, video data.Broadcast audio, video data is received by using unidirectional optical module, can effectively reduce the cost of terminal device.
Description
Technical field
The present invention relates to fiber optic communication field, more particularly to a kind of optical transmission system.
Background technology
The transmission of broadcast television signal is registered one's residence mode, and experienced has from analogue radio transmissions, simulation wire transmission to numeral
The development course of line transmission.At present, whether analogue radio transmissions, simulation wire transmission or digital cable transmission, is being transmitted
In mechanism using be all that tv baseband signal is modulated on carrier frequency after broadcast transmission again by the way of.With digital cable TV
Development, transmission bandwidth, network bi-directional and the broadcasting and TV fiber entering household of cable TV network turn into the new problem that we face.
By the detailed research to CHINA RFTCOM Co Ltd technology, present applicant has proposed cable television IP broadcast as shown in Figure 1
With the solution of fiber entering household, the basic ideas of the program are：Radio network huge numbers of families are made full use of to share broadcast bandwidth
Advantage, cancel the modulation-demodulation technique that bandwidth demand is influenceed in current CHINA RFTCOM Co Ltd, substituted using IP broadcast mode to data flow
The pattern broadcasted again after modulation, from front end to registering one's residence all using realizing that video/audio data flow IP is wide on passive fiber networking
Broadcast.
The program extremely can readily solve the transmission bandwidth of cable network, network bi-directional, realize CHINA RFTCOM Co Ltd light
The problem that fibre is registered one's residence.However, there is the defects of terminal price is of a relatively high in the program in the beginning phase.
The content of the invention
Problems to be solved by the invention
In view of this, it is contemplated that in providing a kind of new optical transmission system, effectively to reduce the equipment cost of terminal.
The solution used to solve the problem
To achieve these goals, according to an embodiment of the invention, there is provided a kind of optical transmission system, it includes light transmitting
Machine, several photoreceivers and the optical fiber of the connection optical sender and photoreceiver, wherein：The optical fiber with 1Gb or with
On speed one-way transmission IP data packet forms broadcast audio, video data；And each photoreceiver is by only receiving optical signal
Unidirectional optical module realize, for receiving the broadcast audio, video data.
For above-mentioned optical transmission system, it is preferable that by each photoreceiver be previously inserted into image intensifer and/or
Optical attenuator, to realize the power match between the optical sender and each photoreceiver.
The effect of invention
The photoreceiver in subscriber terminal equipment is realized by using the unidirectional optical module for only receiving optical signal, with utilization
It is provided simultaneously with the bidirectional optical module of transmission-receiving function to realize that the prior art of subscriber terminal equipment is compared, according to embodiments of the present invention
The optical transmission system provided can effectively reduce the cost of terminal device.
Brief description of the drawings
Fig. 1 is the networking logic chart for the cable television IP broadcast network that the applicant proposes；
Fig. 2 is the block diagram of the optical transmission system provided according to the embodiment of the present invention；
Fig. 3 is the block diagram of the optical transmission system provided according to another embodiment of the present invention；And
Fig. 4 is applied to cable television IP broadcast net shown in Fig. 1 for the optical transmission system provided according to the embodiment of the present invention
The schematic diagram of network.
Embodiment
As described above, present applicant has proposed a kind of cable television IP broadcast scheme.Networking logic such as Fig. 1 institutes of the program
Show, its make full use of radio network huge numbers of families share broadcast bandwidth the advantages of, cancelling in current CHINA RFTCOM Co Ltd influences bandwidth demand
Modulation-demodulation technique, the pattern broadcasted again after being modulated to audio/video flow is substituted using the IP broadcast mode of audio/video flow, in the past
Hold and register one's residence all using the IP broadcast that audio/video flow is realized on passive fiber networking.The program extremely can be solved readily
The transmission bandwidth of cable network, network bi-directional, the problem for realizing CHINA RFTCOM Co Ltd fiber entering household, still, there is terminal in the program
The problem of equipment cost is of a relatively high.In order to reduce the cost of terminal device, the application further provides whole in data receiver
End is using a scheme for the unidirectional optical module of reception optical signal.
Fig. 2 shows the block diagram of the optical transmission system provided according to embodiments of the present invention.As shown in Fig. 2 the light passes
Defeated system 10 includes optical sender 100, several photoreceivers 200（200-1、200-2、…200-N）, optical attenuator 300, light
Amplifier 400 and the optical fiber of connection optical sender 100 and photoreceiver 200.Wherein, the optical fiber can be with 1Gb's or more
The broadcast audio, video data of speed one-way transmission IP data packet forms.For example, broadcast audio, video data can be on optical fiber with
2.125Gb, 2.5Gb or 10Gb speed for example, by 1550nm wavelength one-way transmissions IP traffic.Each photoreceiver 200 is by only
The unidirectional optical module for receiving optical signal is realized, for receiving broadcast audio, video data from optical fiber.
As shown in Fig. 2 preferably by being selectively inserted into image intensifer 400 or optical attenuation before each photoreceiver 200
Device 300 realizes the power match between optical sender 100 and each photoreceiver 200.
Has speech, as shown in Fig. 2 being located in certain photoreceiver 200-1 within the effective propagation path of optical sender 100
In the case of, by being previously inserted into optical attenuator 300 in photoreceiver 200-1 to realize optical sender 100 and the light-receiving
Power match between machine 200-1.On the other hand, the effective propagation path of optical sender 100 is located in certain photoreceiver 200-N
In the case of in addition, by being previously inserted into image intensifer 400 in photoreceiver 200-N to realize optical sender 100 and be somebody's turn to do
Power match between photoreceiver 200-N.
For example, optical sender 100 transmission range be 20 kilometers in the case of, for apart from the optical sender less than 20
Kilometer（Such as 15 kilometers）Photoreceiver 200-1, can be by inserting optical attenuator 300 before photoreceiver 200-1 come real
The now transmitting of light, receiving power matching.On the other hand, for exceeding 20 kilometers apart from the optical sender（Such as 40 kilometers）Light
Receiver 200-N, the transmitting of light, receiving power can be realized by inserting image intensifer 400 before photoreceiver 200-N
Match somebody with somebody.
So, also can be by all photoreceivers 200 even if the distance of optical sender 100 and each photoreceiver 200
Such as receiving power-the 2dB of the standard unidirectional optical module for only receiving optical signal is customized to, so as to not only realize user terminal
The unified management of equipment, and effectively reduce the equipment cost of subscriber terminal equipment.
For above-mentioned optical transmission system 10, it is preferable that optical sender 100 is by the unidirectional optical module of only launching optical signal Lai real
It is existing.So, the equipment cost of whole optical transmission system 10 can further be reduced.
Fig. 3 shows the block diagram of the optical transmission system provided according to another embodiment of the present invention.In Fig. 3 with Fig. 2 marks
Number identical part has identical function.Optical transmission system 20 shown in Fig. 3 can also include optical branching filter 500 and multiplex
Device 600.
Wave multiplexer 600 is inserted between optical sender 100 and optical fiber, for the broadcast audio, video data to one-way transmission with
The PON system data of transmitted in both directions carry out multiplex, so that broadcast audio, video data and PON system data can be the same as at one
Transmitted on optical fiber, wherein PON system includes but is not limited to EPON, GPON or 10G EPON system.For example, broadcast audio, video data
Can be the IP traffic with 10Gb speed for example, by 1550nm wavelength one-way transmissions, and via wave multiplexer 600 and for example
The bi-directional transfer of data multiplex of the PON system of 1310nm/1490nm wavelength and transmitted with an optical fiber.So that together
A piece optical fiber can be simultaneously with 1Gb or more（Such as 2.125Gb, 2.5Gb or 10Gb）Speed one-way transmission IP data packet forms
Broadcast audio, video data, and data of the transmitted in both directions from PON system in a conventional manner.
Optical branching filter 500 is inserted between optical fiber and photoreceiver 200, optical attenuator 300 and/or image intensifer 400, is used
Audio, video data and PON system data are broadcasted in being isolated from the input data from optical fiber.
In addition, it is applied to the wired of the applicant's proposition in the optical transmission system 10 that will be provided according to embodiments of the present invention
In the case of TV IP broadcast net, as shown in figure 4, the data that optical sender 100 is configured in wired broadcasting TV network are sent
In front end, photoreceiver 200 is configured in the data receiving terminal of wired broadcasting TV network, and in optical sender 100
Between each photoreceiver 200 via optical fiber in the form of optical signal transmission of IP data bag.Wherein, IP packets are by example
The processing such as the data such as audio/video flow are encoded, IP packings and generating, and preferably with such as 10Gb 1Gb or more
Speed is for example, by 1550nm wavelength one-way transmissions.
In view of data service, three wavelength transmission mechanism are used in the net of cable television IP broadcast shown in Fig. 4, i.e., with 1Gb
Or more speed for example, by 1550nm wavelength one-way transmission cable television IP broadcasts data, in a conventional manner for example, by
The other business datums of 1490nm/1310nm wavelength transmissions.So that broadcast audio, video data with such as 1550nm wavelength with
Such as 1310nm/1490nm wavelength multiplex of PON system is transmitted on an optical fiber, it is achieved thereby that on same root optical fiber both with
The transmission data of the enough transmitted in both directions PON systems of IP data packet forms one-way transmission broadcast audio, video data and can, namely effectively solution
Determined telecommunications, internet and the Broadcasting Cable Network integration of three networks the problem of.
Correspondingly, data receiving terminal is connected to access network via an optical fiber, and including at least optical branching filter, PON light
Module, PON processing modules, the light-receiving and processing module and network exchange module for supporting 1Gb or more speed.Wherein, light
Channel-splitting filter the IP broadcast audio, video data via an optical fiber input to be separated with other data services, use by PON optical modules
To receive and dispatch the light-receiving of other business datums, support 1Gb or more speed and processing module to receive IP broadcast audio frequency and video number
According to, and network exchange module is branching to IP broadcast audio, video data and other business datums suitably according to type of service
Data-interface.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (5)
1. the optical transmission system that a kind of transmission for broadcast television signal is registered one's residence, including optical sender, several photoreceivers
And the optical fiber of the connection optical sender and photoreceiver, it is characterised in that
The optical sender be configured in wired broadcasting TV network data send front end in, and the photoreceiver by with
Put in the subscriber terminal equipment as data receiving terminal of wired broadcasting TV network, the optical sender with it is each described
Between photoreceiver via the optical fiber in the form of optical signal one-way transmission IP packets, wherein, the data send front end
Beyond transmission network, and the data receiving terminal is connected to access network via optical fiber；
The optical sender is realized by the unidirectional optical module for only launching optical signal, for sending the wide of the IP data packet forms
Broadcast video data, the IP packets for by being encoded to the data of audio/video flow, IP packing processing and generate；
The optical fiber described in 1Gb or more speed one-way transmission to broadcast audio, video data；And
Each photoreceiver is realized by the unidirectional optical module for only receiving optical signal, for receiving the institute transmitted via interchanger
State broadcast audio, video data.
2. optical transmission system according to claim 1, it is characterised in that also including image intensifer and optical attenuator,
By being previously inserted into the image intensifer and/or the optical attenuator in each photoreceiver, to realize the light
Power match between emitter and each photoreceiver.
3. optical transmission system according to claim 1, it is characterised in that
The optical sender is the broadcast optical sender for supporting 1Gb or more speed, and
Each photoreceiver is the broadcast photoreceiver for supporting 1Gb or more speed.
4. optical transmission system according to any one of claim 1 to 3, it is characterised in that also include：
Wave multiplexer, it is inserted between the optical sender and the optical fiber, for the broadcast audio frequency and video to one-way transmission
The PON system data of data and transmitted in both directions carry out multiplex, so that the broadcast audio, video data and the PON system number
Transmitted according to on an optical fiber；And
Optical branching filter, it is inserted between the optical fiber and the photoreceiver, image intensifer and/or optical attenuator, for from
Input data from the optical fiber isolates the broadcast audio, video data.
5. optical transmission system according to any one of claim 1 to 3, it is characterised in that each photoreceiver connects
It is identical to receive power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375943.3A CN103001698B (en) | 2012-09-29 | 2012-09-29 | Optical transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375943.3A CN103001698B (en) | 2012-09-29 | 2012-09-29 | Optical transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103001698A CN103001698A (en) | 2013-03-27 |
| CN103001698B true CN103001698B (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210375943.3A Active CN103001698B (en) | 2012-09-29 | 2012-09-29 | Optical transmission system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456379Y (en) * | 2000-12-07 | 2001-10-24 | 四川省广播电视科研所 | Optical receiving and transmitting terminal facility |
| CN101755410A (en) * | 2007-06-15 | 2010-06-23 | 艾劳普提克公司 | Passive optical network system for the delivery of bi-directional RF services |
| CN201623716U (en) * | 2010-03-26 | 2010-11-03 | 深圳市维信联合科技有限公司 | Unidirectional transmission system with feedback function |
| CN102088381A (en) * | 2010-12-31 | 2011-06-08 | 浙江华盈科技有限公司 | Ultrahigh-frequency wideband network system |
-
2012
- 2012-09-29 CN CN201210375943.3A patent/CN103001698B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456379Y (en) * | 2000-12-07 | 2001-10-24 | 四川省广播电视科研所 | Optical receiving and transmitting terminal facility |
| CN101755410A (en) * | 2007-06-15 | 2010-06-23 | 艾劳普提克公司 | Passive optical network system for the delivery of bi-directional RF services |
| CN201623716U (en) * | 2010-03-26 | 2010-11-03 | 深圳市维信联合科技有限公司 | Unidirectional transmission system with feedback function |
| CN102088381A (en) * | 2010-12-31 | 2011-06-08 | 浙江华盈科技有限公司 | Ultrahigh-frequency wideband network system |
Non-Patent Citations (1)
| Title |
|---|
| "陕西广电省干OTN光传输网的设计与建设";周北望;《2011国际传输与覆盖研讨会》;20111231;第3.2节，图7 * |
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| CN103001698A (en) | 2013-03-27 |
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Effective date of registration: 20170818 Address after: The 100070 Fengtai District Seahawks Beijing City Hospital No. 8 Building No. 3 north four layer Applicant after: Beijing Ji Ji Huitong Technology Co., Ltd. Address before: 130021, Xinmin Avenue, Changchun, Jilin, 1027-1 Applicant before: Jishi Media Co., Ltd. |
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