CN202772898U

CN202772898U - Optical transmission system

Info

Publication number: CN202772898U
Application number: CN 201220510818
Authority: CN
Inventors: 照尔格图; 王胜杰
Original assignee: JISHI MEDIA CO Ltd
Current assignee: Beijing Jishi Huitong Technology Co ltd
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-03-06
Anticipated expiration: 2022-09-29

Abstract

According to the embodiment of the utility model, an optical transmission system is provided. The optical transmission system comprises an optical transmitter, a plurality of optical receivers and an optical fiber for connecting the optical transmitter and the optical receivers. The optical fiber is used to carry out unidirectional transmission on broadcast audio-video data in an IP data packet mode at a speed rate of 1Gb or above; and the functions of all the optical receivers are realized by unidirectional optical modules only receiving optical signals to receive the broadcast audio-video data. The unidirectional optical modules are used to receive the broadcast audio-video data, thereby effectively reducing the cost of terminal equipment.

Description

Optical transmission system

Technical field

The utility model relates to fiber optic communication field, relates in particular to a kind of optical transmission system.

Background technology

The transmission of the broadcast television signal mode of registering one's residence has experienced the development course from analogue radio transmissions, simulation wire transmission to the digital cable transmission.At present, no matter be analogue radio transmissions, the transmission of simulation wire transmission or digital cable, transmission mechanism adopt all be to be modulated to tv baseband signal on the carrier frequency after the mode of broadcasting transmitting again.Along with the development of digital cable TV, the transmission bandwidth of cable TV network, network bi-directional and broadcasting and TV fiber entering household become the new problem that we face.

Through studying in great detail the CHINA RFTCOM Co Ltd technology, the applicant proposed as shown in Figure 1 the cable TV IP broadcast and the solution of fiber entering household, the basic ideas of this scheme are: take full advantage of the advantage that the radio network huge numbers of families share broadcast bandwidth, cancel the modulation-demodulation technique that affects bandwidth demand in the present CHINA RFTCOM Co Ltd, adopt the IP broadcast mode to substitute the pattern of broadcasting again after the data stream modulates, realize the video/audio data flow IP broadcast from front end at the passive fiber networking to all employings of registering one's residence.

This scheme can extremely be easy to solve cable network transmission bandwidth, network bi-directional, realize the difficult problem of CHINA RFTCOM Co Ltd fiber entering household.Yet there is the relatively high defective of terminal price in this scheme in elementary period.

The utility model content

The problem that utility model will solve

In view of this, the utility model is intended to provide a kind of new optical transmission system, with the equipment cost of effective reduction terminal.

For the scheme of dealing with problems

To achieve these goals, according to embodiment of the present utility model, a kind of optical transmission system is provided, it comprises optical sender, several optical receivers and the optical fiber that connects described optical sender and optical receiver, and wherein: described optical fiber is with the broadcasting audio, video data of 1Gb or above speed one-way transmission IP data packet form; And each described optical receiver realized by the Unidirectional light module that receives only light signal, is used for receiving described broadcasting audio, video data.

For above-mentioned optical transmission system, preferably, insert image intensifer and/or optical attenuator by the front at each described optical receiver, realize the power match between described optical sender and each the described optical receiver.

The effect of utility model

The Unidirectional light module that receives only light signal by utilization realizes the optical receiver in the subscriber terminal equipment, realize that with utilizing the bidirectional optical module possess simultaneously transmission-receiving function the prior art of subscriber terminal equipment compares, the optical transmission system that provides according to the utility model embodiment can effectively reduce the cost of terminal equipment.

Description of drawings

Fig. 1 is the networking logic diagram of the cable TV IP broadcast network of the applicant's proposition;

The block diagram of the optical transmission system that provides according to the utility model embodiment is provided Fig. 2;

The block diagram of the optical transmission system that provides according to another embodiment of the utility model is provided Fig. 3; And

The schematic diagram of cable TV IP broadcast network shown in Figure 1 is provided for the optical transmission system that provides according to the utility model embodiment Fig. 4.

Embodiment

As mentioned above, the applicant has proposed a kind of cable TV IP broadcast scheme.The networking logic of this scheme as shown in Figure 1, it takes full advantage of the advantage that the radio network huge numbers of families share broadcast bandwidth, cancel the modulation-demodulation technique that affects bandwidth demand in the present CHINA RFTCOM Co Ltd, adopt the IP broadcast mode of audio/video flow to substitute the pattern of broadcasting again after the audio/video flow modulation, all adopt the IP broadcasts of realizing audio/video flow at the passive fiber networking from front end to registering one's residence.This scheme can extremely be easy to solve cable network transmission bandwidth, network bi-directional, realize the difficult problem of CHINA RFTCOM Co Ltd fiber entering household, still, there is the relatively high problem of terminal equipment cost in this scheme.In order to reduce the cost of terminal equipment, the application has further proposed to adopt at data receiving terminal the scheme of the Unidirectional light module that receives only light signal.

The block diagram of the optical transmission system that provides according to the utility model embodiment is provided Fig. 2.As shown in Figure 2, this optical transmission system 10 comprise optical sender 100, several optical receivers 200(200-1,200-2 ... 200-N), the optical fiber of optical attenuator 300, image intensifer 400 and connection optical sender 100 and optical receiver 200.Wherein, this optical fiber can be with the broadcasting audio, video data of 1Gb or above speed one-way transmission IP data packet form.For example, the broadcasting audio, video data can be for passing through for example IP traffic of 1550nm wavelength one-way transmission with 2.125Gb, 2.5Gb or 10Gb speed on optical fiber.Each optical receiver 200 is realized by the Unidirectional light module that receives only light signal, is used for receiving the broadcasting audio, video data from optical fiber.

As shown in Figure 2, preferably realize power match between optical sender 100 and each optical receiver 200 by before each optical receiver 200, optionally inserting image intensifer 400 or optical attenuator 300.

Tool is sayed it, as shown in Figure 2, the effective propagation path that is positioned at optical sender 100 at certain optical receiver 200-1 with situation under, realize power match between optical sender 100 and this optical receiver 200-1 by insert optical attenuator 300 in the front of this optical receiver 200-1.On the other hand, be positioned at certain optical receiver 200-N in the effective propagation path situation in addition of optical sender 100, by realize the power match between optical sender 100 and this optical receiver 200-N at the front of this optical receiver 200-N insertion image intensifer 400.

For example, be in 20 kilometers the situation in the transmission range of optical sender 100, for apart from the optical receiver 200-1 of this optical sender less than 20 kilometers (for example 15 kilometers), can realize the emission of light, received power coupling by before this optical receiver 200-1, inserting optical attenuator 300.On the other hand, for the optical receiver 200-N that exceeds 20 kilometers (for example 40 kilometers) apart from this optical sender, can realize the emission of light, received power coupling by before this optical receiver 200-N, inserting image intensifer 400.

Like this, even the distance of optical sender 100 and each optical receiver 200 does not wait, also all optical receivers 200 can be customized to the Unidirectional light module that receives only light signal of for example received power-2dB of standard, thereby not only realized the unified management of subscriber terminal equipment, and effectively reduced the equipment cost of subscriber terminal equipment.

For above-mentioned optical transmission system 10, preferably, optical sender 100 is realized by the Unidirectional light module of a utilizing emitted light signal.Like this, can further reduce the equipment cost of whole optical transmission system 10.

The block diagram of the optical transmission system that provides according to another embodiment of the utility model is provided Fig. 3.Parts identical with Fig. 2 label among Fig. 3 have identical function.Optical transmission system 20 shown in Figure 3 can also comprise optical branching filter 500 and wave multiplexer 600.

Wave multiplexer 600 is inserted between optical sender 100 and the optical fiber, be used for the broadcasting audio, video data of one-way transmission and the PON system data of transmitted in both directions are closed ripple, thereby transmit on the optical fiber so that broadcasting audio, video data and PON system data can coexist, wherein the PON system includes but not limited to EPON, GPON or 10G EPON system.For example, the broadcasting audio, video data can for 10Gb speed by the IP traffic of 1550nm wavelength one-way transmission for example, and close ripple and transmit on the optical fiber that coexists via wave multiplexer 600 and the bi-directional transfer of data of the PON system of for example 1310nm/1490nm wavelength.Thus so that, same optical fiber can be simultaneously with the broadcasting audio, video data of 1Gb or above (for example 2.125Gb, 2.5Gb or 10Gb) speed one-way transmission IP data packet form, and in a conventional manner transmitted in both directions from the data of PON system.

Optical branching filter 500 is inserted between optical fiber and optical receiver 200, optical attenuator 300 and/or the image intensifer 400, is used for going out to broadcast audio, video data and PON system data from the input data separating from optical fiber.

In addition, be applied at the optical transmission system 10 that will provide according to the utility model embodiment in the situation of the cable TV IP broadcast net that the applicant proposes, as shown in Figure 4, the data that optical sender 100 is configured in the wired broadcasting TV network send in the front end, optical receiver 200 is configured in the data receiving terminal of wired broadcasting TV network, and between optical sender 100 and each optical receiver 200 via the form transmission of IP data bag of optical fiber with light signal.Wherein, the IP packet generates for processing by the data such as audio/video flow etc. are encoded, IP packing etc., and preferably passes through for example 1550nm wavelength one-way transmission with 1Gb or the above speed of for example 10Gb.

Consider data service, adopt three wavelength transmission mechanism in the cable TV IP broadcast net shown in Figure 4, namely with 1Gb or above speed by 1550nm wavelength one-way transmission cable TV IP broadcast data for example, in a conventional manner by for example other business datum of 1490nm/1310nm wavelength transmission.Thus so that, the broadcasting audio, video data closes ripple with for example 1310nm/1490nm wavelength of for example 1550nm wavelength and PON system and transmits at an optical fiber, thereby realized on the same optical fiber not only also namely efficiently solving the problem of telecommunications, the Internet and the Broadcasting Cable Network integration of three networks with IP data packet form one-way transmission broadcasting audio, video data but also the transmission of data that can transmitted in both directions PON system.

Correspondingly, data receiving terminal is connected to Access Network via an optical fiber, and comprises optical branching filter at least, PON optical module, PON processing module, supports light-receiving and processing module and the network exchange module of 1Gb or above speed.Wherein, optical branching filter is in order to separating with other data service via the IP broadcast audio, video data of an optical fiber input, the PON optical module is in order to receive and dispatch other business datum, support the light-receiving of 1Gb or above speed and processing module in order to receiving the IP broadcast audio, video data, and network exchange module is in order to branch to suitable data-interface according to type of service with IP broadcast audio, video data and other business datum.

The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.

Claims

1. an optical transmission system comprises optical sender, several optical receivers and the optical fiber that connects described optical sender and optical receiver, it is characterized in that,

Described optical fiber is with the broadcasting audio, video data of 1Gb or above speed one-way transmission IP data packet form; And

Each described optical receiver is realized by the Unidirectional light module that receives only light signal, is used for receiving described broadcasting audio, video data.

2. optical transmission system according to claim 1 is characterized in that, also comprises image intensifer and optical attenuator,

By insert described image intensifer and/or described optical attenuator in the front of each described optical receiver, realize the power match between described optical sender and each the described optical receiver.

3. optical transmission system according to claim 1 is characterized in that,

Described optical sender is the broadcasting optical sender of support 1Gb or above speed, and

Each described optical receiver is for supporting the broadcasting optical receiver of 1Gb or above speed.

4. each described optical transmission system in 3 according to claim 1 is characterized in that, also comprises:

Wave multiplexer, it is inserted between described optical sender and the described optical fiber, be used for the described broadcasting audio, video data of one-way transmission and the PON system data of transmitted in both directions are closed ripple, thereby transmit on the optical fiber so that described broadcasting audio, video data and described PON system data coexist; And

Optical branching filter, it is inserted between described optical fiber and described optical receiver, described image intensifer and/or the described optical attenuator, is used for going out described broadcasting audio, video data from the input data separating from described optical fiber.

5. each described optical transmission system in 3 according to claim 1 is characterized in that described optical sender is realized by the Unidirectional light module of a utilizing emitted light signal.

6. each described optical transmission system in 3 according to claim 1 is characterized in that the received power of each described optical receiver is identical.

7. each described optical transmission system in 3 according to claim 1, it is characterized in that, the data that described optical sender is configured in the wired broadcasting TV network send in the front end, and described optical receiver is configured in the data receiving terminal of wired broadcasting TV network.