CN2932878Y - Coaxial mixed full operation access and transmission device with radio frequency interface - Google Patents
Coaxial mixed full operation access and transmission device with radio frequency interface Download PDFInfo
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- CN2932878Y CN2932878Y CN 200620039675 CN200620039675U CN2932878Y CN 2932878 Y CN2932878 Y CN 2932878Y CN 200620039675 CN200620039675 CN 200620039675 CN 200620039675 U CN200620039675 U CN 200620039675U CN 2932878 Y CN2932878 Y CN 2932878Y
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Abstract
A coaxial mixed service access and transport device with radio frequency interface comprises an Ethernet gateway and a parallel coaxial access and transport branch road, wherein the Ethernet gateway comprises a filter, a data demodulation module, an exchange, a cable TV signal radiofrequency distribution module, a cable TV signal radiofrequency signal management module and a gateway module, the input end of the filter is connected with a HFC fiber-optical coaxial network radio frequency distribution module, the output end is divided to two branches, one branch is connected with the exchange to transfer the Ethernet signal, and the other branch is connected with the cable TV signal radiofrequency distribution module to transfer the cable TV radiofrequency signal; every coaxial access and transport branch road has two signal multiplexers/ de-multiplexers, wherein one signal multiplexer/de-multiplexer has a radio-frequency interface connected with the cable TV signal radiofrequency signal management module, a data interface connected with the exchange and a telephone voice interface; the other signal multiplexer/ de-multiplexer has the radio-frequency interface, the data interface and the telephone voice interface.
Description
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 radio frequency interface and inserts and transmitting device.This coaxial mixed full-service with radio frequency interface inserts and transmitting device can also coaxial access and transmission 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 Internet access, 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.But really have following shortcoming: 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 is to provide a kind of coaxial cable access of existing cable TV network and coaxial mixed full-service with radio frequency interface of transmission cable TV signal and baseband data signals of utilizing to 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 radio frequency interface transmission cable TV signal, 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 radio frequency interface inserts and transmitting device, comprises ethernet gateway and some parallel coaxial accesses and transmits branch road; Described ethernet gateway comprises filter, data demodulation module, switch, cable TV signal radio frequency distribution module, cable TV signal radiofrequency signal administration module and webmaster module; Filter input end is connected with HFC fiber-coaxial network radio frequency interface, output is divided into two, one by optical interface, data demodulation module connection switch transmission ethernet signal, another 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 signal radiofrequency signal administration module, has some radio frequency interfaces on the cable TV signal radiofrequency signal administration module; Described webmaster module is connected with cable TV signal 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; Signal multiplexing/the demodulation multiplexer of user side 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 the input and output telephone speech 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 circuit function of Xing Chenging is the multiplexing reconciliation multiplex circuit of cable TV signal, generated 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-coaxial network is on the one hand by the data-interface access band data-signal of switch to the signal multiplexing/demodulation multiplexer that is positioned at supplier's end, on the other hand by cable TV signal radio frequency distribution module and cable TV signal radiofrequency signal administration module radio frequency interface incoming cable television signal to the signal multiplexing/demodulation multiplexer that is positioned at supplier's end, telephone network operator is to the access generated telephone speech 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, telephone speech signal and baseband data signals convert radiofrequency signal to, be transferred to the signal multiplexing/demodulation multiplexer of user side by 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, analog telephone signal and cable TV signal, need not transform, can directly utilize existing HFC fiber-coaxial 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 RJ45 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 radio frequency 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 radio frequency 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 radio frequency interface inserts and transmitting device, comprises ethernet gateway 1 and some parallel coaxial accesses and transmits branch road 2.
Ethernet gateway 1 comprises filter 11, data demodulation module 12, switch 13, cable TV signal radio frequency distribution module 14, cable TV signal radiofrequency signal administration module 15 and webmaster module 16.
Filter 11 inputs are connected with the radio frequency interface of HFC fiber-coaxial network, output is divided into two, one by optical interface, data demodulation module 12 switches 14 transmission ethernet signals, another incoming cable television signal radio frequency distribution module 14 transmission cable TV radiofrequency signals; Cable TV signal radio frequency distribution module 14 outputs are connected with cable TV signal radiofrequency signal administration module 15, have some radio frequency interfaces on the cable TV signal radiofrequency signal administration module 15, webmaster module 16 is connected with cable TV signal radiofrequency signal administration module 15 with switch 13; 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 signal radiofrequency signal administration module 16 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 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, a 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 radio frequency 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 filter, data demodulation module, switch, cable TV signal radio frequency distribution module, cable TV signal radiofrequency signal administration module and webmaster module; Filter input end is connected with HFC fiber-coaxial network radio frequency interface, output is divided into two, one by optical interface, data demodulation module connection switch transmission ethernet signal, another 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 signal radiofrequency signal administration module, has some radio frequency interfaces on the cable TV signal radiofrequency signal administration module; Described webmaster module is connected with cable TV signal 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; Signal multiplexing/the demodulation multiplexer of user side 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 radio frequency 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 radio frequency 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 generated telephone speech interface in order to input and output generated telephone speech signal.
4, a kind of coaxial mixed full-service with radio frequency 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 radio frequency interface as claimed in claim 3 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.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039675 CN2932878Y (en) | 2006-02-22 | 2006-02-22 | Coaxial mixed full operation access and transmission device with radio frequency interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039675 CN2932878Y (en) | 2006-02-22 | 2006-02-22 | Coaxial mixed full operation access and transmission device with radio frequency interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932878Y true CN2932878Y (en) | 2007-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620039675 Expired - Lifetime CN2932878Y (en) | 2006-02-22 | 2006-02-22 | Coaxial mixed full operation access and transmission device with radio frequency interface |
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| Country | Link |
|---|---|
| CN (1) | CN2932878Y (en) |
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2006
- 2006-02-22 CN CN 200620039675 patent/CN2932878Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20070808 |
|
| EXPY | Termination of patent right or utility model |