CN2899303Y - Coaxial mixed service access transmitter with optical-path interface - Google Patents

Coaxial mixed service access transmitter with optical-path interface Download PDF

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Publication number
CN2899303Y
CN2899303Y CN 200620039674 CN200620039674U CN2899303Y CN 2899303 Y CN2899303 Y CN 2899303Y CN 200620039674 CN200620039674 CN 200620039674 CN 200620039674 U CN200620039674 U CN 200620039674U CN 2899303 Y CN2899303 Y CN 2899303Y
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China
Prior art keywords
interface
signal
cable
radio frequency
coaxial
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Expired - Lifetime
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CN 200620039674
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Chinese (zh)
Inventor
秦克志
刘旭明
董戎萍
黄鹏
秦幸坚
秦克栋
王非
吴丽萍
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Online Technology Co., Ltd.
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SHANGHAI ONLAN COMMUNICATION TECHNOLOGY Co Ltd
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Priority to CN 200620039674 priority Critical patent/CN2899303Y/en
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Publication of CN2899303Y publication Critical patent/CN2899303Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

A coaxial mixed service access transmitter with optical-path interface comprises an Ethernet gateway and a parallel coaxial access transmitting branch; the Ethernet gateway comprises an optical splitter, an optical receiver module of Ethernet, an optical receiver module for video signal of cable TV, an exchanger, a radio-frequency distribution module of cable TV signal, a management module for radio-frequency signal of cable TV and a network management module; the network management module is connected with the exchanger and the management module for radio-frequency signal of cable TV signal; for the two signal multiplexers/demultiplexers on each coaxial access transmitting branch, one signal multiplexer/demultiplexer has an radio-frequency interface for connecting the management module for radio-frequency signal of cable TV signal, a data interface for connecting the exchanger and an voice interface for connecting an analog phone while the other signal multiplexer/demultiplexer has a radio-frequency interface, a data interface and a voice interface for connecting an analog phone. The utility model adopts the Frequency Division Multiplexing principle in which the coaxial cables can transmit the Ethernet signal, the cable TV signal and the phone voice signal.

Description

A kind of coaxial mixed full-service with light path interface inserts and transmitting device
Technical field
The utility model relates to the transmission and the control of cable TV signal and baseband data signals, relates in particular to a kind of coaxial mixed full-service with light path interface and inserts and transmitting device.This coaxial mixed full-service with light path interface inserts and transmitting device can also coaxial access and transportation simulator telephone speech signal.
Background technology
Building information superhighway is the important step that realizes to the information-intensive society transformation.But the problem of its implementation, particularly user access networks never finds good solution.Traditional user access networks are exactly common telephone network, use the modulator-demodulator transmitting digital information, exist major defects such as speed is low, cost height.The ISDN technology increases transmission rate, but still can not meet the demands.Later on again research and development multinomial new technology.Wherein more likely is ADSL and cable modem.
The ADSL technology is still utilized telephone network, makes transmission rate obtain significantly improving by the transmission potentiality of giving full play to telephone wire.The main weakness of ADSL technology is that its cost is still higher at present.Cable modem (Cable modem) technology, it also is used in the set-top box, is referred to as cable modem technology at this, and this technology is to utilize cable television network to insert.
At present, the hybrid network that cable television network is made up of optical cable and coaxial cable (HFC net) is a broadband networks that performance is higher.The forward path of cable modem (down going channel) be to use digital modulation technique in the bandwidth of data signal modulation to a television channel and other TV signal transmit together.A pal television channel can transmit the nearly data of 50Mbit/s.This passage is shared by many users, and transmitting data information efficient is high.Owing to be not to use the such circuit handoff technique of telephone network, so the user can keep online connection for a long time and needn't worry the cost of busy line, therefore is specially adapted to the access of internet.
But the weakness of cable modem is its return path (data feedback channel), therefore, utilize existing coaxial cable net to carry out bidirectional data communication or the interior Internet access that continues to make a draft, and what at first will solve is the problem of return path.
Different with the one-way transmission cable TV signal, the network that access service is provided must be two-way, therefore must build two-way HFC net or existing network is carried out bidirectional rebuilding.
The conventional method that solves two-wayization of cable TV now has two kinds, first: lay category-5 cable separately, second: utilize the DOCSIS agreement to open Cable Modem broadband access.Cost is than higher on the one hand for first method, owing to require rewiring, improvement project is implemented difficult on the other hand; Second method is that the transmission band of cable (common frequency range be from several megahertzes to a Gigahertz about) is divided into two frequency bands of height, and high frequency band is used for transmitting cable TV signal and descending access signal, and low-frequency band is used for transmitting up access signal.As the Chinese invention patent notification number is the disclosed integrated services network based on HFC of CN1196624.For realizing carrying out transmitted in both directions with these two frequency bands, all amplifiers in the network all must be two-way, and network design and construction require also more complex than unidirectional network.On the basis of the coaxial cable television network that has built up, carry out bidirectional rebuilding and also must drop into substantial contribution.Owing to when the user also popularizes, just must not drop into a large amount of transformation fundses, investment risk is very big, it is not high to take up rate at present yet, and system cost and maintenance cost are high especially, simultaneously because bandwidth is shared formula, the user realizes that the bandwidth just really enjoy is not wide, can not satisfy the demand that business such as IPTV is carried out.
Another problem is because traditional coaxial cable television network is a tree type unidirectional network, and the noise that many users branch produces all will converge (so-called leakage is effect all) at the network head end, and transmission stability is more scabrous problem always.
In order to overcome these weakness, documents EP0854599 has proposed such system, and it only is used for forward path with cable modem, turns round by telephone network.But the easy to use of cable modem and characteristics have cheaply been lost so again.
Another kind method is whole optical cableizations, realizes that promptly Fiber to the home, and its advantage is that transport tape is roomy, and transmission quality is better, but its cost is very high, and also exists some technical problems still unresolved.
Though technique scheme has solved the technology that the coaxial cable altogether of Ethernet inserts, and realizes that the low-cost popularization of broadband high-speed digital network inserts.Have following shortcoming but lack: 1, the data of HFC data insertion system insert to the shared bandwidth mode, influence each other, and have reduced the performance of system; 2, this system only supports data to insert, and can not merge with plain old telephone service, has brought inconvenience to the user; Up funnel noise is bigger, easily causes the appearance of error code.3, as increasing the support to telephone service, need will carry out large-scale bidirectional rebuilding to existing hfc plant, cost is higher, and the property carried out is poor.
In addition, because the tree network topology structure of Hybrid Fiber Coaxial, network management lacks the management to user side, and signal that can't the supervisory user end promptly can't be controlled television reception basic channel, the increment channel of user side.The charge means fall behind again, cause rate of charge low, and only are to remove circuit to the user's that do not pay dues processing.In addition, value-added service, video request program, interactive TV, value-added service such as charging channel, high-speed figure, because add the loss of the existing image recovery of descrambling authorization and might be decrypted, drawback such as deciphering, be difficult to carry out, make that the Content supply of network is very dull.
The utility model content
One of the purpose of this utility model be to provide one of a kind of the purpose of this utility model to be to provide a kind of coaxial cable that utilizes existing cable TV network to insert and transmission cable TV signal and baseband data signals have the light path interface coaxial mixed full-service insert and transmitting device.
Two of the purpose of this utility model is to provide a kind of coaxial cable of existing cable TV network that utilizes to insert and coaxial mixed full-service access and transmitting device with light path interface transmission cable TV signal, generated telephone speech signal and baseband data signals and that be furnished with network management function.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of coaxial mixed full-service with light path interface inserts and transmitting device, comprises ethernet gateway and some parallel coaxial accesses and transmits branch road; Described ethernet gateway comprises optical branching device, Ethernet Optical Receivers, cable television video flashlight receiver module, switch, cable TV signal radio frequency distribution module, cable TV radiofrequency signal administration module and webmaster module; The optical branching device input is connected with the optical interface of HFC fiber optic network and Internet fiber optic network and enters, output is divided into two, one is passed through optical interface, Ethernet Optical Receivers connection switch transmission ethernet signal, and another is by cable television video flashlight receiver module incoming cable television signal radio frequency distribution module transmission cable TV radiofrequency signal; Cable TV signal radio frequency distribution module output is connected with cable TV radiofrequency signal administration module, has some radio frequency interfaces on the cable TV radiofrequency signal administration module; Described webmaster module is connected with cable TV radiofrequency signal administration module with switch; Coaxial access of each bar and transmission branch road comprise a coaxial cable and be connected in two signal multiplexing/demodulation multiplexers at coaxial cable two ends by radio frequency interface, wherein signal multiplexing/the demodulation multiplexer of supplier's end have one in order to cable TV signal radiofrequency signal administration module on the radio frequency interface that is connected respectively of some radio frequency interfaces and data-interface in order to be connected with plurality of data interface on the switch; Another signal multiplexing/demodulation multiplexer also has in order to the radio frequency interface of user's TV output cable TV signal with in order to the data-interface to user PC output input baseband data signals.
The coaxial line end connects or the signal multiplexing of user side/demodulation multiplexer data-interface end connects the echo problems that causes in order to solve, increase by an echo inhibit feature module in the switch described in the utility model, make it to become one and have the switch of taking back the ripple inhibit feature.
The utility model also has a call voice interface in order to input analog electrical output language tone signal on above-mentioned two signal multiplexing/demodulation multiplexers.
Signal multiplexing/demodulation multiplexer described in the utility model, comprise that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two-way transmission signals, two line caps of described conversion equipment connect the low frequency end of high-pass and low-pass filter, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter, also has a radio frequency interface to connect the common port of high-pass and low-pass filter.The function of the circuit of Xing Chenging is the multiplexing reconciliation multiplex circuit of cable TV signal and base-band data signal thus, and these two kinds of signals can be transmitted in same cable.
High-pass and low-pass filter in the described multiplexing demultiplexing device also has a ultralow frequency end, and described ultralow frequency end connects the simulation telephone signal interface.The function of the circuit of Xing Chenging is the multiplexing reconciliation multiplex circuit of cable TV signal, telephone speech signal and base-band data signal thus, and these three kinds of signals can be transmitted in same cable.
Owing to adopted technical scheme as above, existing HFC fiber optic network and Internet fiber optic network are on the one hand by the RJ45 interface access band data-signal of switch to the signal multiplexing/demodulation multiplexer that is positioned at supplier's end, the cable TV signal that inserts to the radio frequency interface of the signal multiplexing/demodulation multiplexer that is positioned at supplier's end by signal distribution module and cable TV radiofrequency signal administration module on the other hand, telephone network operator is to the incoming voice call signal of the signal multiplexing/demodulation multiplexer that is positioned at supplier's end, signal multiplexing/the demodulation multiplexer that is positioned at supplier's end is with the cable TV signal that inserts, generated telephone speech signal and baseband data signals convert radiofrequency signal to, be transferred to the signal multiplexing/demodulation multiplexer of user side in the coaxial cable of cable TV network, the signal multiplexing/demodulation multiplexer of user side converts the radiofrequency signal that receives to cable TV signal again, generated telephone speech signal and baseband data signals are transferred to user's TV, telephone set and PC.
The utility model adopts the principle of frequency division multiplexing, and the generated telephone speech signal transmits in the 0-20K frequency band, and data-signal transmits in the 0.5M----35M frequency band, and cable TV signal transmits in the 47M-860M frequency band.The utility model has made full use of existing coaxial cable frequency range, has realized the transmission of multi-service signal.The utility model is a passive structures, and is highly reliable, low-cost.Block the path of directly presenting radio noise from user side fully, solved the problem of " funnel (converging) noise " of the bidirectional rebuilding of long-term puzzlement cable TV effectively.When the utility model is applied to coaxial transmission ethernet signal, telephone signal and cable TV signal, need not transform, can directly utilize existing HFC fiber-coaxial network and Internet fiber optic network, reduce the cost that inserts existing network.Owing to carry out broadband access by taking back ripple inhibit feature module switch, the signal multiplexing/demodulation multiplexer data-interface end that has solved connection of coaxial line end or user side connects the echo problems that causes.The utility model has increased network management function, can be to the management of user side, and the signal of supervisory user end is suitable for IP, LAN, the professional IPTV of the focus by the Ethernet transmission of video and digital television on-demand etc.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
The coaxial mixed full-service that Fig. 1 has a light path interface for the utility model embodiment 1 a kind of inserts and the principle schematic of transmitting device.
Fig. 2 is signal multiplexing/demodulation multiplexer principle schematic of the utility model embodiment 1.
The coaxial mixed full-service that Fig. 3 has a light path interface for the utility model embodiment 2 a kind of inserts and the principle schematic of transmitting device.
Fig. 4 be the utility model embodiment 2 signal multiplexing/demodulation multiplexer principle schematic.
Embodiment
Embodiment 1:
Referring to Fig. 1, a kind of coaxial mixed full-service with light path interface inserts and transmitting device, comprises ethernet gateway 1 and some parallel coaxial accesses and transmits branch road 2.
Ethernet gateway 1 comprises optical branching device 11, Ethernet Optical Receivers 12, cable television video flashlight receiver module 13, switch 14, cable TV signal radio frequency distribution module 15, cable TV radiofrequency signal administration module 16 and webmaster module 17; Optical branching device 11 inputs are connected with the optical interface of HFC fiber optic network and Internet fiber optic network and enter, output is divided into two, one is passed through optical interface, Ethernet Optical Receivers 12 switches 14 transmission ethernet signals, and another is by cable television video flashlight receiver module 13 incoming cable television signal radio frequency distribution module 15 transmission cable TV radiofrequency signals; Cable TV signal radio frequency distribution module 15 outputs are connected with cable TV radiofrequency signal administration module 16, have some radio frequency interfaces on the cable TV radiofrequency signal administration module 16, webmaster module 17 is connected with cable TV radiofrequency signal administration module 16 with switch 14.
Coaxial access of each bar and transmission branch road 2 comprise a coaxial cable 21 and be connected in two signal multiplexing/demodulation multiplexers 22 at coaxial cable 21 two ends by radio frequency interface, wherein signal multiplexing/the demodulation multiplexer 22 of supplier's end have one in order to cable TV radiofrequency signal administration module 16 on the radio frequency interface that is connected respectively of some radio frequency interfaces and RJ45 interface in order to be connected with plurality of data interface on the switch; Another signal multiplexing/demodulation multiplexer 22 also has in order to the radio frequency interface of user's TV output cable TV signal with in order to the data-interface to user PC output input baseband data signals.
Referring to Fig. 2, signal multiplexing demodulation multiplexer 22 comprises that one four road ether signal is converted into the conversion equipment 221 and a high-pass and low-pass filter 222 of two paths of signals transmission, two line caps of conversion equipment 221 connect the low frequency end of high-pass and low-pass filter 222, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter 222, also has a radio frequency interface to connect the common port of high-pass and low-pass filter 222.The function of the circuit of Xing Chenging is the multiplexing reconciliation multiplex circuit of cable TV signal and base-band data signal thus, can receive the cable TV signal that transmits in the same cable and base-band data signal and with its demultiplexing transmission user.Wherein the model of high-pass and low-pass filter is DPX-63.
Embodiment 2:
Referring to Fig. 3, on two signal multiplexing/demodulation multiplexers 22, also has a call voice interface in order to input and output generated telephone speech signal.All the other are with embodiment 1.
Referring to Fig. 4, signal multiplexing/demodulation multiplexer 22 comprises that one four road ether signal is converted into the conversion equipment 221 and a high-pass and low-pass filter 222 of two-way transmission signals, two line caps of conversion equipment 221 connect the low frequency end of high-pass and low-pass filter 222, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter 222, also have a radio frequency interface to connect the common port of high-pass and low-pass filter 222, an analog telephone signal interface connects the ultralow frequency end of high-pass and low-pass filter 222.The function of the circuit of Xing Chenging is the multiplexing reconciliation multiplex circuit of cable TV signal and base-band data signal and voice analog signal thus, and these three kinds of signals can be transmitted in same cable.
The model that four road ether signals recited above are converted into the conversion equipment 221 of two-way transmission signals is PONX-42
Data-interface recited above generally adopts the RJ45 interface, certainly, also can adopt the data-interface of other version.
Above-mentioned described speech interface generally adopts the RJ11 interface.Certainly, also can adopt other speech interface.
Echo inhibit feature module recited above can adopt Elink6000.
Webmaster module recited above can adopt Sprite8000.
Certainly,, do not spend performing creative labour, on the basis of the foregoing description, can do multiple variation, can realize the purpose of this utility model equally for one of ordinary skill in the art.But this variation obviously should be in the protection range of claims of the present utility model.

Claims (8)

1, a kind of coaxial mixed full-service with light path interface inserts and transmitting device, comprises ethernet gateway and some parallel coaxial accesses and transmits branch road; It is characterized in that: described ethernet gateway comprises optical branching device, Ethernet Optical Receivers, cable television video flashlight receiver module, switch, cable TV signal radio frequency distribution module, cable TV radiofrequency signal administration module and webmaster module; The optical branching device input is connected with the optical interface of HFC fiber optic network and Internet fiber optic network and enters, output is divided into two, one is passed through optical interface, Ethernet Optical Receivers connection switch transmission ethernet signal, and another is by cable television video flashlight receiver module incoming cable television signal radio frequency distribution module transmission cable TV radiofrequency signal; Cable TV signal radio frequency distribution module output is connected with cable TV radiofrequency signal administration module, has some radio frequency interfaces on the cable TV radiofrequency signal administration module; Described webmaster module is connected with cable TV radiofrequency signal administration module with switch; Coaxial access of each bar and transmission branch road comprise a coaxial cable and be connected in two signal multiplexing/demodulation multiplexers at coaxial cable two ends by radio frequency interface, wherein signal multiplexing/the demodulation multiplexer of supplier's end have one in order to cable TV signal radiofrequency signal administration module on the radio frequency interface that is connected respectively of some radio frequency interfaces and data-interface in order to be connected with plurality of data interface on the switch; Another signal multiplexing/demodulation multiplexer also has in order to the radio frequency interface of user's TV output cable TV signal with in order to the data-interface to user PC output input baseband data signals.
2, a kind of coaxial mixed full-service with light path interface as claimed in claim 1 inserts and transmitting device, it is characterized in that: increase by an echo inhibit feature module in the described switch, make it to become one and have the switch of taking back the ripple inhibit feature.
3, a kind of coaxial mixed full-service with light path interface as claimed in claim 1 or 2 inserts and transmitting device, it is characterized in that: on above-mentioned two signal multiplexing/demodulation multiplexers, also have a call voice interface in order to input and output generated telephone speech signal.
4, a kind of coaxial mixed full-service with light path interface as claimed in claim 1 or 2 inserts and transmitting device, it is characterized in that: described signal multiplexing/demodulation multiplexer, comprise that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two-way transmission signals, two line caps of described conversion equipment connect the low frequency end of high-pass and low-pass filter, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter, also has a radio frequency interface to connect the common port of high-pass and low-pass filter.
5, a kind of coaxial mixed full-service with light path interface as claimed in claim 3 inserts and transmitting device, it is characterized in that: described signal multiplexing/demodulation multiplexer comprises that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two-way transmission signals, two line caps of conversion equipment connect the low frequency end of high-pass and low-pass filter, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter, also have a radio frequency interface to connect the common port of high-pass and low-pass filter, a telephone signal interface connects the ultralow frequency end of high-pass and low-pass filter.
6, a kind of coaxial mixed full-service with radio frequency interface as claimed in claim 1 or 2 inserts and transmitting device, and it is characterized in that: described data-interface is the RJ45 interface.
7, a kind of coaxial mixed full-service with radio frequency interface as claimed in claim 4 inserts and transmitting device, and it is characterized in that: described data-interface is the RJ45 interface.
8, a kind of coaxial mixed full-service with radio frequency interface as claimed in claim 5 inserts and transmitting device, and it is characterized in that: described data-interface is the RJ45 interface.
CN 200620039674 2006-02-22 2006-02-22 Coaxial mixed service access transmitter with optical-path interface Expired - Lifetime CN2899303Y (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102510349A (en) * 2011-11-04 2012-06-20 刘彩声 Three networks convergence access network
CN101742013B (en) * 2009-12-22 2012-12-05 中兴通讯股份有限公司 System and method for simulating user line access multiplexing
CN103339879A (en) * 2010-11-29 2013-10-02 西班牙电信公司 System for signals indoor distribution on optical fiber
CN104125016A (en) * 2014-07-23 2014-10-29 南车株洲电力机车研究所有限公司 Ethernet fiber interface circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101742013B (en) * 2009-12-22 2012-12-05 中兴通讯股份有限公司 System and method for simulating user line access multiplexing
CN103339879A (en) * 2010-11-29 2013-10-02 西班牙电信公司 System for signals indoor distribution on optical fiber
CN102510349A (en) * 2011-11-04 2012-06-20 刘彩声 Three networks convergence access network
CN104125016A (en) * 2014-07-23 2014-10-29 南车株洲电力机车研究所有限公司 Ethernet fiber interface circuit

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C56 Change in the name or address of the patentee

Owner name: SHANGHAI ONLAN INFORMATION TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: AOLAN COMMUNICATION TECH CO., LTD., SHANGHAI

CP03 Change of name, title or address

Address after: 201700, No. 7888, Pine Road, Qingpu District, Shanghai, 101-B21

Patentee after: Online Technology Co., Ltd.

Address before: 201700 No. 10 Daxing Road, Qingpu District, Shanghai

Patentee before: Shanghai Onlan Communication Technology Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20070509

EXPY Termination of patent right or utility model