CN102300018A - 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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- CN102300018A CN102300018A CN2011102183785A CN201110218378A CN102300018A CN 102300018 A CN102300018 A CN 102300018A CN 2011102183785 A CN2011102183785 A CN 2011102183785A CN 201110218378 A CN201110218378 A CN 201110218378A CN 102300018 A CN102300018 A CN 102300018A
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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 the cable TV 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 two-wayization of cable TV network is the prerequisite of carrying out the interactive television business, improved two-wayization network can provide more personalized, specialized, diversified radio and television and information service for broad masses of the people, helps national information, social informatization and household's IT application construction.
Simultaneously, along with broad masses of the people are more and more stronger to professional demand such as digital TV in high resolution, high-speed data download, surfing on the net, it is more and more higher to the requirement of the network bandwidth to carry out these business, and the deployment of broadband network is imperative, and the market space is huge.
It should be noted that the digital home network broadband wireless access constantly heats up in the whole world, as the research emphasis of broadband wireless access, the wireless digital home network has the vast market space.Along with household electrical appliance, mobile device and computer equipment technology are brought in constant renewal in and raising, seamless mutual between the three, the 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 at home places, realizes that the wireless digital home networking has become the trend of development.
In the prior art, still do not have a kind of low cost, high-quality service transmission system satisfies the needs of transfer of data, therefore, presses for a complete low cost solution, finishes TV transmission, broadband, phone data business.
Summary of the invention
The present invention proposes a kind of TV based on the cable TV HFC network, broadband, telephone transmission system over against the defective of prior art.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows:
Based on TV, broadband and the telephone transmission system of cable TV HFC network, 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 the CATV light signal, the light signal of described intermediate-freuqncy signal and IP signal also are converted to radiofrequency signal separately with the light signal of described CATV light signal and described intermediate-freuqncy signal, the light signal of described IP signal is modulated into eoc signal, 3G signal and WIFI signal, described corridor unit mixes and distributes the CATV radiofrequency signal by the user, 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 the room.
As possibility, described key calculator room equipment is modulated into the intermediate frequency signal of telecommunication of 1.2G ~ 1.6GHZ earlier with HDTV (High-Definition Television) IP signal, then the intermediate frequency signal of telecommunication 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 with mixed signal demultiplexing signal.
As possibility, above-mentioned described branch distributor connects wideband terminal use box, described wideband terminal use box is launched 3G signal in the 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 the EOC terminal with eoc signal.
As possibility, above-mentioned described set-top box comprises frequency demultiplier, and described frequency demultiplier mixes down to the radiofrequency signal of intermediate-freuqncy signal below the 860MHZ from 1.2G ~ 1.6GHZ.
As possibility, described corridor unit comprises the CATV signal receiver, the intermediate-freuqncy signal optical receiver, the EOC local side apparatus, 3G signal modulating equipment, WIFI signal modulating equipment, the opto-electronic conversion switch, multi-service signal combiner and signal mixing distributor, described opto-electronic conversion switch is given described EOC local side apparatus with signal allocation, described 3G signal modulating equipment, described WIFI signal modulating equipment, described multi-service signal combiner is accepted described CATV signal receiver, the intermediate-freuqncy signal optical receiver, the signal of telecommunication of EOC local side apparatus and 3G signal modulating equipment, described signal mixing distributor are 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, can realize the line transmission of signals such as TV, broadband, phone by above-mentioned transmission system, what realization broadcasting and television network, the Internet, 3G netted interconnects, establish network foundation for carrying out full media business miscellaneous, and this transmission system expands to 2.8GHz with the register one's residence bandwidth frequency of cable of family from present 860MHz, expanded three times of (CATV:0-860MHz that have a surplus; 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 satisfy the user to professional demand such as digital TV in high resolution, high-speed data download, this transmission system can be transmitted 3G signal and WIFI signal, wherein the indoor covering of 3G signal provides transmission to support, help to ensure the business experience of 3G subscription, the particularly experience of data service, help operator to promote the flow of 3G business, the WIFI signal guarantees the good indoor covering of wireless broadband network, for the 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 the broadband wireless networking technology, home gateway and out of Memory equipment or intelligent electric appliance are formed the Internet of Things network that can carry out information exchange, and link to each other with external network by home gateway, provide the various modern systems that serve to the domestic consumer, lay the foundation for realizing wired home and wisdom city future.The user can use the equipment received signal of various band network interfaces, realizes carrying out the cable broadband business.Thereby native system is realized the 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, the 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 simultaneously on the cable TV HFC network, make it first three and throw the net and implement the "Three-in-One Network" on function, the construction cost of network system descends greatly.
Description of drawings
Fig. 1 is the network topology structure schematic diagram of transmission system of the present invention;
Fig. 2 is a corridor unit connection diagram;
Fig. 3 is a subscriber household equipment connection diagram.
Embodiment
Below with the present invention is described further with specific embodiment with reference to the accompanying drawings.
The system works principle:
Native system comprises key calculator room equipment, corridor unit and subscriber household equipment.
Equipment by key machine room is modulated into the signal of frequency at 1.2GHz～1.6GHz with high-definition signal, does not take the following frequency range of current cable network 860MHz, by optical fiber high-definition signal is delivered to the corridor unit; The corridor unit is responsible for CATV light signal that Optical Fiber Transmission is come and the converting optical signals of intermediate-freuqncy signal becomes radiofrequency signal, the light signal of IP signal is carried out opto-electronic conversion, and the signal of telecommunication of the IP signal after will changing is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals mixed and distributes by the user; By existing coaxial wire of registering one's residence mixed signal is sent into subscriber household, connect the branch distributor in the family information access case, the branch distributor that inserts in the case by family information is transferred to each room respectively with the mixed signal demultiplexing, realizes the distribution of mixed signal in inner each room of subscriber household; Mixed signal is transferred to the wideband terminal use box that connects behind each room in the subscriber household equipment, the wide frequency antenna that 3G signal in the mixed signal and WIFI signal carry by wideband terminal use box is to aerial emission, the user realizes carrying out the professional and WIFI wireless broadband business of 3G by the portable terminal received signal of various 3G and WIFI; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for set-top box, when set-top box need receive high-definition signal, need the intermediate-freuqncy signal of frequency at 1.2GHz～1.6GHz to be mixed down to below the 860MHz, send into then and decode in the set-top box and play by frequency demultiplier; Wideband terminal use box connects the EOC terminal provides a plurality of network interfaces for the user, and the user can use the equipment received signal of various band network interfaces, realizes carrying out the cable broadband business.Thereby native system is realized the line transmission of TV, broadband, telephone signal, reaches the integration of three networks of cable TV network.
Specific as follows described:
As shown in Figure 1, a kind of TV based on the cable TV HFC network, broadband, telephone transmission system comprise metropolitan area fiber backbone network, key calculator room equipment, corridor unit, subscriber household equipment.The metropolitan area fiber backbone network connects with television network, 3G net and the Internet and obtains corresponding signal.Be transformed into the light signal of intermediate-freuqncy signal from the IP signal of the HDTV (High-Definition Television) of metropolitan area fiber backbone network by key calculator room equipment, be distributed to each corridor unit by multi-channel optical fibre with the light signal of CATV light signal and IP signal.The corridor unit becomes radiofrequency signal with the CATV light signal that transmits and the converting optical signals of intermediate-freuqncy signal, the light signal of IP signal is carried out opto-electronic conversion, and the IP signal signal of telecommunication after will changing is modulated into eoc signal, 3G signal and WIFI signal, then above-mentioned 5 signals mixed and distributes by the user.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 the mixed signal and WIFI signal carry by the wideband terminal use box in the subscriber household equipment is to aerial emission, and the user can be by the portable terminal received signal 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 the EOC terminal provides a plurality of network interfaces for the user, and the user can use the equipment received signal of various band network interfaces.
As shown in Figure 2, the 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.The CATV signal receiver receives 2 cores (1 core is standby) the CATV signal in 8 core fibres, converts light signal to rf signal.The 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.The 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 the EOC radiofrequency signal by the EOC local side, be modulated into the 3G radiofrequency signal by 3G signal modulating equipment, be modulated into the WIFI radiofrequency signal by WIFI signal modulating equipment.Wherein the radiofrequency signal of CATV radiofrequency signal, intermediate-freuqncy signal, EOC radiofrequency signal and 3G radiofrequency signal are carried out the signal mixing by the unified input of coaxial wire multi-service signal combiner.The mixed signal of multi-service signal combiner output is carried out the signal mixing with the WIFI radiofrequency signal by coaxial wire total input mixing distributor and is concentrated and distribute by different users.
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 the family information access case, the branch distributor that inserts in the case by family information is transferred to each room respectively with the mixed signal demultiplexing, realize the distribution of mixed signal, insert the distribution way of the branch distributor in the case according to the quantity decision family information in user family room in inner each room of subscriber household.Mixed signal is transferred to the wideband terminal use box that connects behind each room in the subscriber household equipment, the wide frequency antenna that 3G signal in the mixed signal and WIFI signal carry by wideband terminal use box is to aerial emission, the user realizes carrying out the professional and WIFI wireless broadband business of 3G by the portable terminal received signal of various 3G and WIFI; Wideband terminal use box connects frequency demultiplier provides CATV signal and intermediate-freuqncy signal for set-top box, when set-top box need receive high-definition signal, need the radiofrequency signal of frequency in the intermediate-freuqncy signal of 1.2GHz～1.6GHz to be mixed down to below the 860MHz, send into then and decode in the set-top box and play by frequency demultiplier; Wideband terminal use box connects the EOC terminal provides a plurality of network interfaces for the user, and the user can use the equipment received signal of various band network interfaces, realizes carrying out the cable broadband business.
The above only is a preferred implementation of the present invention; 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 the protection range of the present invention.
Claims (7)
1. based on TV, broadband and the telephone transmission system of cable TV HFC network, it is characterized in that, 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 the CATV light signal, the light signal of the light signal of described intermediate-freuqncy signal and IP signal also is converted to radiofrequency signal separately with the light signal of described CATV light signal and described intermediate-freuqncy signal, the light signal of described IP signal is modulated into eoc signal, 3G signal and WIFI signal, described corridor unit mixes and distributes the CATV radiofrequency signal by the user, 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 the room.
2. the TV based on the cable TV HFC network according to claim 1, broadband and telephone transmission system, it is characterized in that, described key calculator room equipment is modulated into the intermediate frequency signal of telecommunication of 1.2G ~ 1.6GHZ earlier with HDTV (High-Definition Television) IP signal, then the intermediate frequency signal of telecommunication is converted into the light signal of described intermediate-freuqncy signal.
3. the TV based on the cable TV HFC network according to claim 1, broadband and telephone transmission system is characterized in that, described corridor unit connects described subscriber household equipment by coaxial wire.
4. the TV based on the cable TV HFC network according to claim 1, broadband and telephone transmission system is characterized in that, described subscriber household equipment comprises branch distributor, and described branch distributor is with mixed signal demultiplexing signal.
5. the TV based on the cable TV HFC network according to claim 4, broadband and telephone transmission system, it is characterized in that, described branch distributor connects wideband terminal use box, described wideband terminal use box is launched 3G signal in the 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 the EOC terminal with eoc signal.
6. the TV based on the cable TV HFC network according to claim 5, broadband and telephone transmission system, it is characterized in that, described set-top box comprises frequency demultiplier, and described frequency demultiplier mixes down to the radiofrequency signal of intermediate-freuqncy signal below the 860MHZ from 1.2G～1.6GHZ.
7. the TV based on the cable TV HFC network according to claim 1, broadband and telephone transmission system, it is characterized in that, described corridor unit comprises the CATV signal receiver, the intermediate-freuqncy signal optical receiver, the EOC local side apparatus, 3G signal modulating equipment, WIFI signal modulating equipment, the opto-electronic conversion switch, multi-service signal combiner and signal mixing distributor, described opto-electronic conversion switch is given described EOC local side apparatus with signal allocation, described 3G signal modulating equipment, described WIFI signal modulating equipment, described multi-service signal combiner is accepted described CATV signal receiver, the intermediate-freuqncy signal optical receiver, the signal of telecommunication of EOC local side apparatus and 3G signal modulating equipment, described signal mixing distributor are accepted the signal of telecommunication of described multi-service signal combiner and the output of described WIFI signal modulating equipment.
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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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| CN103780282A (en) * | 2012-10-19 | 2014-05-07 | 上海斐讯数据通信技术有限公司 | EOC terminal and data transmission system and 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 |
| CN104579861A (en) * | 2013-09-04 | 2015-04-29 | 艾锐势公司 | FFT tap WiFi extension device |
| CN111917478A (en) * | 2020-08-14 | 2020-11-10 | 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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