CN102300018B - Television, broadband and telephone transmission system based on cable television HFC (Hybrid Fiber-Coaxial) network - Google Patents
Television, broadband and telephone transmission system based on cable television HFC (Hybrid Fiber-Coaxial) network Download PDFInfo
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Abstract
The invention discloses a television, broadband and telephone transmission system based on a cable television HFC (Hybrid Fiber-Coaxial) network, and the system provided by the invention comprises a backbone computer room device, a corridor unit device and a user home device, wherein the backbone computer room device is connected with the corridor unit device, and the corridor unit device is connected with the user home device; the backbone computer room device converts a high-definition television IP (Internet Protocol) signal into an optical signal of an intermediate-frequency signal; the corridor unit device receives a CATV (Community Antenna Television) optical signal, the optical signal of the intermediate-frequency signal and the IP signal, converts the CATV optical signal and the optical signal of the intermediate-frequency signal into respective radio-frequency signals, and modulates the optical signal of the IP signal into an EOC (Ethernet over Coax) signal, a 3G (The 3rd Generation Telecommunication) signal and a WIFI (Wireless Fidelity) signal; the corridor unit device mixes and allocates a CATV radio-frequency signal, the radio-frequency signal of the intermediate-frequency signal, the EOC signal, the 3G signal and the WIFI signal according to users; and the user home device allocates the mixed signals, which are transmitted by the corridor unit device, according to rooms. By utilizing the system, television, broadband and telephone signals can be simultaneously transmitted in the cable television HFC network, so that three previous networks can be fused on the aspect of function, and the construction cost of a network system is greatly lowered.
Description
Technical field
The present invention relates to a kind of TV, broadband, telephone transmission system, relate in particular to a kind of TV, broadband, telephone transmission system based on CATV HFC Network.
Background technology
Current, follow the raising of broad masses of the people's material and culture and cultural life, people increase day by day to the demand of interactive television business.The transformation of cable TV network Two-way is the prerequisite of carrying out interactive television business, improved Two-way network can provide more personalized, specialized, diversified radio and television and information service for broad masses of the people, is conducive to national information, social informatization and household's IT application construction.
Meanwhile, along with broad masses of the people are more and more stronger to the demand of the business such as digital TV in high resolution, high-speed data download, surfing on the net, carry out these business more and more higher to the requirement of the network bandwidth, the deployment of broadband network is imperative, and the market space is huge.
It should be noted that digital home network broadband wireless access constantly heats up in the whole world, as the research emphasis of broadband wireless access, wireless digital home network has the wide market space.Along with household electrical appliance, mobile device and computer equipment technology are constantly updated and improve, seamless mutual between three, consumer obtains, checks and manage increasing digital media content on household electrical appliances, mobile device and computer equipment, media content is easily appreciated easily by different equipment in different places at home, realizes the trend that wireless digital home networkization has become development.
In prior art, there is no a kind of low cost, high-quality service transmission system meets the needs of transfer of data, therefore, in the urgent need to a complete solution cheaply, completes TV transmission, broadband, phone data business.
Summary of the invention
The present invention, over against the defect of prior art, proposes a kind of TV, broadband, telephone transmission system based on CATV HFC Network.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows:
TV based on CATV HFC Network, broadband and telephone transmission system, comprise key calculator room equipment, corridor unit and subscriber household equipment, described key calculator room equipment connects described corridor unit, and described corridor unit connects described subscriber household equipment, described key calculator room equipment is converted into HDTV (High-Definition Television) IP signal the light signal of intermediate-freuqncy signal, described corridor unit will be accepted CATV light signal, the light signal of described intermediate-freuqncy signal and IP signal are also converted to radiofrequency signal separately by the light signal of described CATV light signal and described intermediate-freuqncy signal, the optical signal modulation of described IP signal is become to eoc signal, 3G signal and WIFI signal, described corridor unit mixes and presses user assignment CATV radiofrequency signal, the radiofrequency signal of intermediate-freuqncy signal, described eoc signal, described 3G signal and described WIFI signal, described subscriber household equipment carries out the mixed signal of described corridor unit transmission to distribute by room.
As possibility, described key calculator room equipment is first modulated into HDTV (High-Definition Television) IP signal the medium frequency electric signal of 1.2G ~ 1.6GHZ, then medium frequency electric signal is converted into the light signal of described intermediate-freuqncy signal.
As possibility, described corridor unit connects described subscriber household equipment by coaxial wire.
As possibility, described subscriber household equipment comprises branch distributor, and described branch distributor is divided into multiple signals by mixed signal.
As possibility, branch distributor described above connects wideband terminal use box, described wideband terminal use box is launched the 3G signal in mixed signal and WIFI signal by wide frequency antenna, the radio signal transmission of CATV radiofrequency signal and intermediate-freuqncy signal, to Set Top Box, is transferred to EOC terminal by eoc signal.
As possibility, Set Top Box described above comprises frequency demultiplier, and described frequency demultiplier mixes down to the radiofrequency signal of intermediate-freuqncy signal below 860MHZ from 1.2G ~ 1.6GHZ.
As possibility, described corridor unit comprises CATV signal receiver, intermediate-freuqncy signal optical receiver, EOC local side apparatus, 3G signal modulating equipment, WIFI signal modulating equipment, opto-electronic conversion switch, multi-service signal combiner and signal mixing distributor, described opto-electronic conversion switch is distributed to described EOC local side apparatus by signal, described 3G signal modulating equipment, described WIFI signal modulating equipment, described multi-service signal combiner is accepted described CATV signal receiver, intermediate-freuqncy signal optical receiver, the signal of telecommunication of EOC local side apparatus and 3G signal modulating equipment, described signal mixing distributor is accepted the signal of telecommunication of described multi-service signal combiner and the output of described WIFI signal modulating equipment.
Beneficial effect of the present invention is:
1, the line that can realize the signals such as TV, broadband, phone by above-mentioned transmission system transmits, realize interconnecting of broadcasting and television network, the Internet, 3G net, for carrying out full media business miscellaneous, establish network foundation, and this transmission system expands to 2.8GHz by the register one's residence bandwidth frequency of cable of family from current 860MHz, three times of (CATV:0-860MHz that have a surplus have been expanded; EOC:900MHz-1.1GHz; Intermediate-freuqncy signal: 1.2-1.6GHz; 3G signal: 1.7GHz-2.3GHz; WIFI signal: 2.4GHz-2.8GHz; So be to expand to 2.8GHz, expansion is more than three times), can meet the demand of user to business such as digital TV in high resolution, high-speed data downloads, this transmission system can be transmitted 3G signal and WIFI signal, wherein the indoor covering of 3G signal provides transmission to support, contribute to ensure the business experience of 3G subscription, the particularly experience of data service, contribute to operator to promote the flow of 3G business, WIFI signal guarantees the good indoor covering of wireless broadband network, for user provides high bandwidth, high-quality, stable, safe wireless broadband business.
2, this transmission system adopts and wiredly forms a kind of brand-new networking plan with broadband wireless networking technology, home gateway and out of Memory equipment or intelligent electric appliance are formed to the internet of things that can carry out information exchange, and be connected with external network by home gateway, to domestic consumer, provide the system of various modern services, for realizing wired home future and wisdom city lays the foundation.User can use the various equipment with network interface to receive signal, realizes and carries out cable broadband business.Thereby native system is realized a line transmission of TV, broadband, telephone signal, reaches the integration of three networks of cable TV network.
3, original TV programme is mainly by the single carrying of broadcasting and television network, voice class service is mainly by the single carrying of telephone network, data services is mainly by the Internet bearer, and the present invention can realize TV transmission, broadband, telephone signal on CATV HFC Network simultaneously, make it first three and throw the net and implement the "Three-in-One Network" in function, the construction cost of network system declines greatly.
Accompanying drawing explanation
Fig. 1 is the network topology structure schematic diagram of transmission system of the present invention;
Fig. 2 is corridor unit connection diagram;
Fig. 3 is subscriber household equipment connection schematic diagram.
Embodiment
Below by the present invention is described further with specific embodiment with reference to the accompanying drawings.
System Working Principle:
Native system comprises key calculator room equipment, corridor unit and subscriber household equipment.
Equipment by key machine room is modulated into frequency at the signal of 1.2GHz～1.6GHz by high-definition signal, does not take the frequency range below current cable network 860MHz, by optical fiber, high-definition signal is delivered to corridor unit; The CATV light signal that corridor unit is responsible for Optical Fiber Transmission to come and the converting optical signals of intermediate-freuqncy signal become radiofrequency signal, the light signal of IP signal is carried out to opto-electronic conversion, and the signal of telecommunication of IP signal after conversion is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals are mixed and by user assignment; By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household, connect the branch distributor in family information cut-in box, by the branch distributor in family information cut-in box, mixed signal is divided into multichannel and is transferred to respectively each room, realize mixed signal in the distribution in inner each room of subscriber household; Mixed signal connects the wideband terminal use box in subscriber household equipment after being transferred to each room, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by wideband terminal use box is to air-launched, user receives signal by the mobile terminal of various 3G and WIFI, realizes and carries out 3G business and WIFI wireless broadband business; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box, need by frequency demultiplier, by frequency, the intermediate-freuqncy signal at 1.2GHz～1.6GHz mix down to below 860MHz when Set Top Box need to receive high-definition signal, then send into and in Set Top Box, decode and play; Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals, realizes and carries out cable broadband business.Thereby native system is realized a line transmission of TV, broadband, telephone signal, reaches the integration of three networks of cable TV network.
Described in specific as follows:
As shown in Figure 1, a kind of TV, broadband, telephone transmission system based on CATV HFC Network, comprises metropolitan area fiber backbone network, key calculator room equipment, corridor unit, subscriber household equipment.Metropolitan area fiber backbone network connects and obtains corresponding signal with television network, 3G net and the Internet.IP signal from the HDTV (High-Definition Television) of metropolitan area fiber backbone network is transformed into the light signal of intermediate-freuqncy signal by key calculator room equipment, be distributed to each corridor unit with together with the light signal of CATV light signal and IP signal by multi-channel optical fibre.Corridor unit becomes radiofrequency signal by the converting optical signals of the CATV light signal transmitting and intermediate-freuqncy signal, the light signal of IP signal is carried out to opto-electronic conversion, and the IP signal signal of telecommunication after conversion is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals are mixed and by user assignment.By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household and connect subscriber household equipment, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by the wideband terminal use box in subscriber household equipment is to air-launched, and user can receive signal by the mobile terminal of various 3G and WIFI.Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box and television set.Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals.
As shown in Figure 2, corridor unit comprises multi-service signal combiner, signal mixing distributor, opto-electronic conversion switch, CATV signal receiver, intermediate-freuqncy signal optical receiver, EOC local side apparatus, 3G signal modulating equipment and WIFI signal modulating equipment.CATV signal receiver receives 2 cores (1 core is standby) the CATV signal in 8 core fibres, converts light signal to rf signal.Intermediate-freuqncy signal optical receiver receives the light signal of 2 cores (1 core the is standby) intermediate-freuqncy signal in 8 core fibres, converts light signal to rf signal.Opto-electronic conversion switch receives the light signal of 2 core IP signals in 8 core fibres, converts light signal to the signal of telecommunication.The signal of telecommunication of IP signal connects EOC local side apparatus, 3G signal modulating equipment and WIFI signal modulating equipment by category-5 cable, and be modulated into EOC radiofrequency signal by EOC local side, by 3G signal modulating equipment, be modulated into 3G radiofrequency signal, by WIFI signal modulating equipment, be modulated into WIFI radiofrequency signal.Wherein the radiofrequency signal of CATV radiofrequency signal, intermediate-freuqncy signal, EOC radiofrequency signal and 3G radiofrequency signal are unified input multi-service signal combiner by coaxial wire and are carried out signal mixing.The mixed signal of multi-service signal combiner output is carried out signal mixing and is concentrated and distribute by different users by coaxial wire total input mixing distributor from WIFI radiofrequency signal.
As shown in Figure 3, subscriber household equipment comprises wideband terminal use box, frequency demultiplier and EOC terminal equipment.By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household, connect the branch distributor in family information cut-in box, by the branch distributor in family information cut-in box, mixed signal is divided into multichannel and is transferred to respectively each room, realize mixed signal in the distribution in inner each room of subscriber household, according to the quantity in user family room, determine the distribution way of the branch distributor in family information cut-in box.Mixed signal connects the wideband terminal use box in subscriber household equipment after being transferred to each room, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by wideband terminal use box is to air-launched, user receives signal by the mobile terminal of various 3G and WIFI, realizes and carries out 3G business and WIFI wireless broadband business; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box, need by frequency demultiplier, by frequency, the radiofrequency signal in the intermediate-freuqncy signal of 1.2GHz～1.6GHz mix down to below 860MHz when Set Top Box need to receive high-definition signal, then send into and in Set Top Box, decode and play; Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals, realizes and carries out cable broadband business.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered as in protection range of the present invention.
Claims (1)
1. the TV based on CATV HFC Network, broadband and telephone transmission system, is characterized in that, comprises key calculator room equipment, corridor unit and subscriber household equipment; Equipment by key machine room is modulated into frequency at the signal of 1.2GHz～1.6GHz by high-definition signal, does not take the frequency range below current cable network 860MHz, by optical fiber, high-definition signal is delivered to corridor unit; The CATV light signal that corridor unit is responsible for Optical Fiber Transmission to come and the converting optical signals of intermediate-freuqncy signal become radiofrequency signal, the light signal of IP signal is carried out to opto-electronic conversion, and the signal of telecommunication of IP signal after conversion is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals are mixed and by user assignment; By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household, connect the branch distributor in family information cut-in box, by the branch distributor in family information cut-in box, mixed signal is divided into multichannel and is transferred to respectively each room, realize mixed signal in the distribution in inner each room of subscriber household; Mixed signal connects the wideband terminal use box in subscriber household equipment after being transferred to each room, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by wideband terminal use box is to air-launched, user receives signal by the mobile terminal of various 3G and WIFI, realizes and carries out 3G business and WIFI wireless broadband business; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box, need by frequency demultiplier, by frequency, the intermediate-freuqncy signal at 1.2GHz～1.6GHz mix down to below 860MHz when Set Top Box need to receive high-definition signal, then send into and in Set Top Box, decode and play; Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals, realizes and carries out cable broadband business; Thereby native system is realized a line transmission of TV, broadband, telephone signal, reaches the integration of three networks of cable TV network;
Wherein, metropolitan area fiber backbone network connects and obtains corresponding signal with television network, 3G net and the Internet; IP signal from the HDTV (High-Definition Television) of metropolitan area fiber backbone network is transformed into the light signal of intermediate-freuqncy signal by key calculator room equipment, be distributed to each corridor unit with together with the light signal of CATV light signal and IP signal by multi-channel optical fibre; Corridor unit becomes radiofrequency signal by the converting optical signals of the CATV light signal transmitting and intermediate-freuqncy signal, the light signal of IP signal is carried out to opto-electronic conversion, and the IP signal signal of telecommunication after conversion is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals are mixed and by user assignment; By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household and connect subscriber household equipment, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by the wideband terminal use box in subscriber household equipment is to air-launched, and user can receive signal by the mobile terminal of various 3G and WIFI; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box and television set; Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals;
Corridor unit comprises multi-service signal combiner, signal mixing distributor, opto-electronic conversion switch, CATV signal receiver, intermediate-freuqncy signal optical receiver, EOC local side apparatus, 3G signal modulating equipment and WIFI signal modulating equipment; CATV signal receiver receives 2 cores in 8 core fibres, and wherein 1 core is standby, and CATV signal, converts light signal to rf signal; Intermediate-freuqncy signal optical receiver receives 2 cores in 8 core fibres, and wherein 1 core is standby, and the light signal of intermediate-freuqncy signal, converts light signal to rf signal; Opto-electronic conversion switch receives the light signal of 2 core IP signals in 8 core fibres, converts light signal to the signal of telecommunication; The signal of telecommunication of IP signal connects EOC local side apparatus, 3G signal modulating equipment and WIFI signal modulating equipment by category-5 cable, and be modulated into EOC radiofrequency signal by EOC local side, by 3G signal modulating equipment, be modulated into 3G radiofrequency signal, by WIFI signal modulating equipment, be modulated into WIFI radiofrequency signal; Wherein the radiofrequency signal of CATV radiofrequency signal, intermediate-freuqncy signal, EOC radiofrequency signal and 3G radiofrequency signal are unified input multi-service signal combiner by coaxial wire and are carried out signal mixing; The mixed signal of multi-service signal combiner output is carried out signal mixing and is concentrated and distribute by different users by coaxial wire total input mixing distributor from WIFI radiofrequency signal;
Subscriber household equipment comprises wideband terminal use box, frequency demultiplier and EOC terminal equipment; By existing coaxial wire of registering one's residence, mixed signal is sent into subscriber household, connect the branch distributor in family information cut-in box, by the branch distributor in family information cut-in box, mixed signal is divided into multichannel and is transferred to respectively each room, realize mixed signal in the distribution in inner each room of subscriber household, according to the quantity in user family room, determine the distribution way of the branch distributor in family information cut-in box; Mixed signal connects the wideband terminal use box in subscriber household equipment after being transferred to each room, the wide frequency antenna that 3G signal in mixed signal and WIFI signal carry by wideband terminal use box is to air-launched, user receives signal by the mobile terminal of various 3G and WIFI, realizes and carries out 3G business and WIFI wireless broadband business; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for Set Top Box, need by frequency demultiplier, by frequency, the radiofrequency signal in the intermediate-freuqncy signal of 1.2GHz～1.6GHz mix down to below 860MHz when Set Top Box need to receive high-definition signal, then send into and in Set Top Box, decode and play; Wideband terminal use box connects EOC terminal provides a plurality of network interfaces for user, and user can use the various equipment with network interface to receive signals, realizes and carries out cable broadband business.
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| CN201110218378.5A CN102300018B (en) | 2011-08-02 | 2011-08-02 | Television, broadband and telephone transmission system based on cable television HFC (Hybrid Fiber-Coaxial) network |
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| CN201110218378.5A CN102300018B (en) | 2011-08-02 | 2011-08-02 | Television, broadband and telephone transmission system based on cable television HFC (Hybrid Fiber-Coaxial) network |
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| CN102300018B true CN102300018B (en) | 2014-10-08 |
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| CN102724089B (en) * | 2012-06-21 | 2016-01-20 | 武汉钢铁(集团)公司 | The interior network access method of a kind of IAD |
| CN103001779B (en) * | 2012-09-29 | 2015-07-01 | 吉视传媒股份有限公司 | Data receiving terminal in network data transmission system |
| CN103780282B (en) * | 2012-10-19 | 2017-12-05 | 上海斐讯数据通信技术有限公司 | A kind of data transmission method |
| CN103929314A (en) * | 2013-01-12 | 2014-07-16 | 陕西天思信息科技有限公司 | Multi-mode access novel EOC device |
| US9113187B2 (en) * | 2013-09-04 | 2015-08-18 | Arris Enterprises, Inc. | FFT tap WiFi extension device |
| CN111917478B (en) * | 2020-08-14 | 2021-05-04 | 深圳市前海多晟科技股份有限公司 | Intelligent media terminal fusing 5G micro base station |
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