CN2882129Y - Signal multiplex and demultiplex device - Google Patents
Signal multiplex and demultiplex device Download PDFInfo
- Publication number
- CN2882129Y CN2882129Y CN 200620039669 CN200620039669U CN2882129Y CN 2882129 Y CN2882129 Y CN 2882129Y CN 200620039669 CN200620039669 CN 200620039669 CN 200620039669 U CN200620039669 U CN 200620039669U CN 2882129 Y CN2882129 Y CN 2882129Y
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- multiplexing
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- cable
- pass filter
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Abstract
The utility model provides a multiplexing and de-multiplexing device, which comprises a converter converting four channels of Ethernet signals into two transmission signals and a hi/low-pass filter. The two-line port of the converter are connected with the low-frequency end of the hi/low-pass filter, the four-line port of the converter are connected with a digital port, two radio-frequency interfaces are connected with the high-frequency end and common end of the hi/low-pass filter. A circuit constituted in this way is a multiplexing and de-multiplexing circuit for cable TV signals and base-band data signals, allows these signals to be transmitted in the same cable. The hi/low-pass filter is additionally provided with a super low-frequency end that is connected with a port of phone signal. The circuit constituted in this way is a multiplexing and de-multiplexing circuit for cable TV signals, voice phone signals and base-band data signals, so that these three signals can be transmitted in the same cable. The utility model is in principle of frequency division and multiplexing, the voice phone signals are transmitted in 0-20 k frequency band, data signals are transmitted in 0.5M-35M frequency band, and cable TV signals are transmitted in 47M-860M frequency band.
Description
Technical field
The utility model relates to a kind of in cable TV network, adopts the apparatus for multiplexing and demultiplexing of coaxial cable synchronous transmission cable TV signal and baseband data signals.
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 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 funneling effect) 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.
And the transmission of ethernet signal is at present transmitted by 5 class lines, wherein be divided into two-way upward signal and two-way downstream signal, therefore in the process that cable inserts altogether, at first the technical problem that will solve is how the multiplexing one-tenth one tunnel descending radiofrequency signal of data-signal that two-way is up is transmitted in coaxial cable, demultiplexing into the up data-signal of two-way with the radiofrequency signal of going on the way that will transmit in the coaxial cable transmits at 5 class lines, finish coaxial cable and balance to the conversion between the line by the balance/imbalance translation circuit, promptly finish the 2/4 line conversion of data channel full duplex.
In addition, present system only supports data to insert, and can not merge with the common simulation telephone service, has brought inconvenience to the user; As increasing support to telephone service, need to carry out large-scale bidirectional rebuilding to existing hfc plant, cost is higher, and the property carried out is poor.
The utility model content
The purpose of this utility model is to provide a kind of can the realization to finish coaxial cable and the balance apparatus for multiplexing and demultiplexing to the conversion between the line by the balance/imbalance translation circuit.This device can be finished the data-signal of Ethernet and the multiplexing and demultiplexing of voice signal.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of apparatus for multiplexing and demultiplexing, comprise that one four road ether signal is converted into the balance/unbalance 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 apparatus for multiplexing and demultiplexing also has a ultralow frequency end, and described ultralow frequency end connects 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.
The utility model adopts the principle of frequency division multiplexing, and 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, reduce the cost that inserts existing network.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural principle schematic diagram of the apparatus for multiplexing and demultiplexing of the utility model embodiment 1.
Fig. 2 is the structural principle schematic diagram of the apparatus for multiplexing and demultiplexing of the utility model embodiment 2.
Embodiment
Embodiment 1: referring to Fig. 1, a kind of apparatus for multiplexing and demultiplexing, comprise that one four road ether signal is converted into the conversion equipment 1 and a high-pass and low-pass filter 2 of two-way transmission signals, two line caps of conversion equipment 1 connect the low frequency end of high-pass and low-pass filter 2, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter 2, also has a radio frequency interface to connect the common port of high-pass and low-pass filter 2.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.Wherein the model of high-pass and low-pass filter is DPX-63.
Embodiment 2: referring to Fig. 2, the signal multiplexing Deplexing apparatus comprises that one four road ether signal is converted into the conversion equipment 1 and a high-pass and low-pass filter 2 of two-way transmission signals, two line caps of described conversion equipment 1 connect the low frequency end of high-pass and low-pass filter 2, four line caps connect data-interface, one radio frequency interface connects the front end of high-pass and low-pass filter 2, also have a radio frequency interface to connect the common port of high-pass and low-pass filter 2, a telephone signal interface connects the ultralow frequency end of high-pass and low-pass filter 2.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.
Data-interface recited above generally adopts the RJ45 interface, certainly, also can adopt the data-interface of other version.
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 (4)
1, a kind of apparatus for multiplexing and demultiplexing, it is characterized in that: 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.
2, a kind of apparatus for multiplexing and demultiplexing as claimed in claim 1 is characterized in that: the high-pass and low-pass filter in the described apparatus for multiplexing and demultiplexing also has a ultralow frequency end, and described ultralow frequency end connects telephone signal interface.
3, a kind of apparatus for multiplexing and demultiplexing as claimed in claim 1 is characterized in that: described data-interface is the RJ45 interface.
4, a kind of apparatus for multiplexing and demultiplexing as claimed in claim 1 or 2 is characterized in that: the model of described conversion equipment is PONX-42.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039669 CN2882129Y (en) | 2006-02-22 | 2006-02-22 | Signal multiplex and demultiplex device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039669 CN2882129Y (en) | 2006-02-22 | 2006-02-22 | Signal multiplex and demultiplex device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2882129Y true CN2882129Y (en) | 2007-03-21 |
Family
ID=37881972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620039669 Expired - Lifetime CN2882129Y (en) | 2006-02-22 | 2006-02-22 | Signal multiplex and demultiplex device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2882129Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457697A (en) * | 2010-10-27 | 2012-05-16 | 上海澳润信息科技有限公司 | Device for passively transmitting IPTV (Internet Protocol Television) signal in coaxial cable |
| CN111147095A (en) * | 2019-12-19 | 2020-05-12 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
-
2006
- 2006-02-22 CN CN 200620039669 patent/CN2882129Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457697A (en) * | 2010-10-27 | 2012-05-16 | 上海澳润信息科技有限公司 | Device for passively transmitting IPTV (Internet Protocol Television) signal in coaxial cable |
| CN111147095A (en) * | 2019-12-19 | 2020-05-12 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
| CN111147095B (en) * | 2019-12-19 | 2021-10-15 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
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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: 20070321 |
|
| EXPY | Termination of patent right or utility model |