CN102790709A - Coaxial access network unit device with WIFI (wireless fidelity) - Google Patents
Coaxial access network unit device with WIFI (wireless fidelity) Download PDFInfo
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- CN102790709A CN102790709A CN2012103041112A CN201210304111A CN102790709A CN 102790709 A CN102790709 A CN 102790709A CN 2012103041112 A CN2012103041112 A CN 2012103041112A CN 201210304111 A CN201210304111 A CN 201210304111A CN 102790709 A CN102790709 A CN 102790709A
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Abstract
The invention discloses a coaxial access network unit device with WIFI (wireless fidelity). The coaxial access network unit device comprises an RJ(registered jack)-45 data interface group, an Ethernet exchange chip, an EOCMAC (ethernet over coax media access control) chip, an EOC (Ethernet over coax) physical layer chip, a network transformer, a duplex filter, a data coaxial F interface, a wired television coaxial F interface, a radio frequency chip and antennae, wherein a low-frequency output port of the duplex filter is connected with the data coaxial F interface, and is connected with the network transformer and the EOC physical layer chip in sequence and then is connected with the EOCMAC chip by an MII (media independent interface) data interface; and the high-frequency output port of the duplex filter is connected with the wired television coaxial F interface. With the adoption of the coaxial access network unit device, the current wired television network is sufficiently used, high-speed data access of a wired television user can be conveniently and economically achieved, thereby the requirements that the multi-data terminal device of the user is simultaneously accessed by adopting a wireless manner and a wired manner.
Description
Technical field
The present invention relates to a kind of coaxial access network unit that possesses wireless WIFI, be applicable to receive cable TV signal and transmitting-receiving baseband data signals simultaneously; This equipment belongs to the technical field of coaxial wide band multi-business Access Network.
Background technology
At present; The application of communication system has obtained the development of advancing by leaps and bounds; Digital technology, network technology have obtained popularization and application; Along with the release of broadband internet services such as IPTV, HDTV, VoIP, make the user vigorous for the broadband access increasing demand of multimedia communications such as data, voice, image, the trend of " integration of three networks " is also more and more obvious.
Have data to show, the investment of subscribers feeder accounts for the 40%-50% of whole Access Network investment, if can utilize existing network to realize that broadband network inserts, and so just can avoid laying the new communications network that involves great expense.Cable TV network (CATV) is as one of the widest network of coverage; Have characteristics such as bandwidth, aboundresources; Optical fiber/coaxial hybrid network also is one of infrastructure of following information superhighway to CATV simultaneously; If can transform to it, be used for realizing being connected between user and the telecommunication transport network, the broadband inserting service of economical and efficient will inevitably be provided for the user so.Like this when realizing the transformation of two-wayization of cable TV network, for radio network of future generation (NGB) provides the profitable carrier-class broadband cable scheme of registering one's residence.
At present, the bidirectional rebuilding technology of comparative maturity mainly contains: CMTS+CM, passive EOC technology, active EOC technology.
(1) CMTS (Cable Modem Termination System)+CM (Cable Modem) is the cable modem technology.Wherein CMTS is a core, adopts the DOCSIS agreement of International Telecommunications Union; User terminal CM is connected with Internet through CMTS, can in cable TV network, realize functions such as IP phone, video request program.This technical development is comparative maturity, and its major technique shortcoming is to have adopted the bus-network topological structure, and user's shared bandwidth causes transfer of data unstable, adds the funneling effect of influx noise, and its its domestic application scale is limited.
(2) passive EOC technology.Passive EOC is meant a kind of Ethernet transmission technology based on coaxial cable that adopts passive device.It adopts the baseband coding mode, and the bipolar signal that only will be used for the twisted-pair feeder transmission converts the unipolar signal of being convenient to the coaxial cable transmission to.The passive EOC technology inserts bridge through placing at the corridor head end, the noise of user-isolated end, thus solved the most general also the most scabrous problem---the funnel noise that cable TV network exists.But passive EOC only is applicable to point-to-point topological structure, can not support the cable TV network that user distribution is relatively loose.
(3) active EOC technology.At present active modulated the different and different of EOC technical basis modulation system and working frequency range, mainly contains the HomePlug technology: the frequency range below 30MHz, and utilize the OFDM physical layer of power line communications and 802.3 MAC layer to realize broadband technology.Next is the HomePNA technology: this is to use a kind of home network technologies on telephone wire, and its 3.0 version also expands to one of its carrier to coaxial cable, and the frequency range of employing is also at low frequency end.The 3rd is the MoCA technology: the carrier frequency of MoCA is separated with the frequency of former broadcasting and TV, is from 800MHz to 1500MHz, and its each frequency range 50MHz can support 31 users or 62 users, shares the band width in physical up to 270M.The 4th is WiFi over Coax: this technology adopts 802.11b, with wireless high band 2.5GHz carrier wave, moves the 750-950MHz frequency range of coax, takies the 20MHz frequency range, can be the physical layer rate that the user provides 108Mpbs.The 5th is ECAN-Ethernet Coax Access Network, and this technical work is adopted the broadband access of the method realization user data of many level vestigial side band modulation in the low-frequency range of 5-65MHz.
Summary of the invention
The high-speed data that the present invention provides a kind of convenience to realize the cable TV subscriber economically inserts, and the multidata terminal equipment that satisfies the user adopts wireless and wired mode coaxial access network unit that possesses wireless WIFI of access demand simultaneously.
For realizing the foregoing invention purpose, the present invention has adopted following technical scheme:
A kind of coaxial access network unit that possesses wireless WIFI, it comprises RJ-45 data-interface group, ether exchange chip, EOC MAC control chip, EOC physical chip, network transformer, duplexer filter, the coaxial F interface of data, cable TV coaxial F interface, radio frequency chip and antenna; Said duplexer filter high frequency delivery outlet is connected with the cable TV coaxial F interface; Said duplexer filter low frequency delivery outlet is connected with the coaxial F interface of data; And said duplexer filter is connected the back with said network transformer successively and is connected with said EOC MAC control chip through the MII data-interface with said EOC physical chip, said EOC MAC control chip is connected with said ether exchange chip through the MII data-interface; Said ether exchange chip is connected with said RJ-45 data-interface group with said radio frequency chip through the MII data-interface, and said radio frequency chip is connected with antenna.
Preferably, said EOC MAC control chip adopts the IEEE802.3ah media access control protocol, and upward signal and downstream signal transmit and be operated in identical frequency band, and upward signal is communicated by letter with downstream signal and adopted the TDD time division duplex.
Preferably, in this coaxial access network unit, broadband ether data-signal and cable TV signal frequency division multiplexing, wherein broadband ether data-signal frequency band takies 5-65MHz, the cable TV signal frequency band takies 65-750MHz.
Preferably, ether data-signal in broadband adopts the n-VSB modulation technique.
Preferably; This coaxial access network unit also comprises power module; Said power module comprises mains switch, voltage stabilizing chip, voltage transitions chip and reset signal chip; Said mains switch is connected with the voltage stabilizing chip, and this voltage stabilizing chip delivery outlet is connected with the reset signal chip with the voltage transitions chip.
Power module produces 1.8V or 3.3V direct current, for all chips of equipment comprise: MAC chip, physical chip, ether exchange chip and radio frequency chip power supply; The power reset switch that is connected with power module is that all chips of equipment provide reset signal.Power supply connects the voltage stabilizing chip through mains switch the 12V direct current is converted to the 3.3V DC power supply and signal is transferred to voltage transitions chip and reset signal chip through delivery outlet; The voltage transitions chip converts the 3.3V DC power supply to 1.8V, and the reset signal chip is used for producing restarts reset signal.
Compared with prior art; Beneficial effect of the present invention is: make full use of existing cable TV network; Convenient cable TV subscriber's the high-speed data of realizing economically inserts; Satisfy the demand that user's multidata terminal equipment adopts wireless and wired mode to insert simultaneously; And a plurality of user terminal access devices through wireless mode and wired mode insert can obtain enough bandwidth simultaneously, and under the scheduling and management of front-end control facilities, realize that wideband data safe and reliable and that have QoS to ensure inserts.
Description of drawings
Fig. 1 is the internal circuit configuration figure that possesses the coaxial access network unit of wireless WIFI in the present invention's one preferred embodiment;
Fig. 2 is the circuit structure diagram of power module among Fig. 1 embodiment;
The structural representation that Fig. 3 uses in the coaxial access net system of ECAN for the present invention.
Embodiment
Consult Fig. 1-2; This coaxial access network unit that possesses wireless WIFI comprises RJ-45 data-interface group, ether exchange chip, EOC MAC control chip, EOC physical chip, network transformer, duplexer filter, the coaxial F interface of data, cable TV coaxial F interface, radio frequency chip and power module; Duplexer filter high frequency delivery outlet is connected with the cable TV coaxial F interface; Duplexer filter low frequency delivery outlet is connected with the coaxial F interface of data; Duplexer filter is connected the back with network transformer successively and is connected with EOC MAC control chip through the MII data-interface with the EOC physical chip; EOC MAC control chip is connected with the ether exchange chip through the MII data-interface, and the ether exchange chip is connected with radio frequency chip with RJ-45 data-interface group through the MII data-interface; Wherein power module is made up of mains switch, voltage stabilizing chip, voltage transitions chip and reset signal chip; Mains switch is connected with the voltage stabilizing chip; Voltage stabilizing chip delivery outlet is connected with the reset signal chip with the voltage transitions chip, and power module is connected with the power reset switch.
Preferably, power module is connected with the dc power supply interface, and dc power supply is the 12V DC power supply; Wherein RJ-45 data-interface group is made up of four RJ-45 data-interfaces, and the RJ-45 data-interface is connected with subscriber computer through twisted-pair feeder, and radio frequency chip is connected with antenna.
Power module produces 1.8V or 3.3V direct current, for all chips of equipment comprise: MAC chip, physical chip, ether exchange chip and radio frequency chip power supply; The power reset switch that is connected with power module is that all chips of equipment provide reset signal.Power supply connects the voltage stabilizing chip through mains switch the 12V direct current is converted to the 3.3V DC power supply and signal is transferred to voltage transitions chip and reset signal chip through delivery outlet; The voltage transitions chip converts the 3.3V DC power supply to 1.8V, and the reset signal chip is used for producing restarts reset signal.
To all NE equipment, promptly present embodiment sends the IEEE802.3ah ether data-signal of cable TV signal and n-VSB modulation to the local side apparatus of ECAN network with broadcast mode.Wherein the frequency range that takies of broadcast television signal is 65-860MHz, and the frequency range that takies of the data-signal of n-VSB modulation is 5-65MHz.Cable TV signal and data-signal adopt the mode of frequency division multiplexing through coaxial Access Network, via the coaxial F interface of present embodiment equipment, deliver to duplexer filter; Duplexer filter is accomplished separating of cable TV signal and data-signal; After the cable TV signal of high band leached; Deliver to user's TV receiving apparatus by coaxial F interface, the data-signal with the n-VSB modulation of low-frequency range becomes the bipolar differential signal through network transformer simultaneously, delivers to the EOC physical chip; The EOC physical chip obtains IEEE802.3ah ether data-signal to the n-VSB signal demodulation that receives, and this signal is delivered to EOC MAC control chip; EOC MAC control chip is according to the data link sign of the packet that receives; Judge whether the packet that arrives belongs to local; And will belong to local user data, MPCP protocol data and OAM (Organization Administration Management) data and take out, and with the data packet discarding of non-genus local address.The execution of the main IEEE802.3ah of completion of the MPCP bag protocol instructions of taking out comprises that the user registers automatically, and allocated bandwidth keeps synchronous etc. with front end CLT.The ether data that the MAC chip is standard with the user data that takes out and OAM reduction of data; And deliver to the ether exchange chip via the MII data-interface; The ether exchange chip according to the MAC Address of the Ether frame that arrives with packet exchange to four RJ-45 data-interface and radio frequency chip; And export the user data terminal to through wired and wireless mode respectively, like notebook computer etc.
The up transport process of user side data-signal: the standard ether data that send at the user data terminal are delivered to the ether exchange chip of present embodiment by radio frequency chip through the RJ-45 data-interface or after antenna receives; The buffer memory of the upstream data that different terminals sends simultaneously in the ether exchange chip waited in line to transmit; The upstream data bag of transmitting is delivered to EOC MAC control chip via the MII interface; After this is packaged into the IEEE802.3ah data; Send into buffer memory, wait in line to distribute sending time slots by CLT.In the sending time slots of confirming; Data-signal is delivered to the EOC physical chip through the MII data-interface; The EOC physical chip carries out n-VSB modulation with up data-signal, become unipolar signal via network transformer after, through duplexer filter; See off by coaxial F interface, accomplish the transmission of upstream data.
Present embodiment is the user side access device in the ECAN technology, supports the wired access at 4 data terminals and the wireless access of a plurality of data terminals.The ECAN technology is technological with the bidirectional rebuilding that technological the combining of EPON+FTTB constituted the broadband hfc plant.
Consult Fig. 3, the associating operational version of EPON and ECAN.Data and cable TV signal are through the EPON network; Arrive optical network unit; Baseband data signals and cable TV signal by the optical network unit demodulation is come out are imported by first line of a couplet network interface and the coaxial F interface of CLT respectively, and CLT becomes IEEE802.3ah ether data with standard ether data encapsulation, and through after the n-VSB modulation; Close ripple with the cable TV signal of input, send into coaxial cable access network with broadcast mode.After CNU receives the signal of CLT transmission; Through duplexer filter filtering; TV signal is delivered to user's television set; And data-signal is reduced into the ether data of standard through demodulation, and, these data are exchanged to corresponding data terminal equipment through RJ45 data-interface or wireless WIFI mode according to the MAC Address that arrives data.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (5)
1. coaxial access network unit that possesses wireless WIFI; It comprises that RJ-45 data-interface group, ether exchange chip, EOC MAC control chip, EOC physical chip, network transformer, duplexer filter, the coaxial F interface of data, cable TV coaxial F interface, radio frequency chip and the said duplexer filter high frequency of antenna delivery outlet are connected with the cable TV coaxial F interface; Said duplexer filter low frequency delivery outlet is connected with the coaxial F interface of data; And said duplexer filter is connected the back with said network transformer successively and is connected with said EOC MAC control chip through the MII data-interface with said EOC physical chip; It is characterized in that: said EOC MAC control chip is connected with said ether exchange chip through the MII data-interface; Said ether exchange chip is connected with said RJ-45 data-interface group with said radio frequency chip through the MII data-interface, and said radio frequency chip is connected with antenna.
2. a kind of coaxial access network unit that possesses wireless WIFI according to claim 1; It is characterized in that; Said EOC MAC control chip adopts the IEEE802.3ah media access control protocol; And upward signal and downstream signal transmit and are operated in identical frequency band, and upward signal is communicated by letter with downstream signal and adopted the TDD time division duplex.
3. a kind of coaxial access network unit that possesses wireless WIFI according to claim 1; It is characterized in that; Broadband ether data-signal and cable TV signal frequency division multiplexing in this coaxial access network unit, wherein broadband ether data-signal frequency band takies 5-65MHz, the cable TV signal frequency band takies 65-750MHz.
4. a kind of coaxial access network unit that possesses wireless WIFI according to claim 3 is characterized in that, broadband ether data-signal adopts the n-VSB modulation technique.
5. a kind of coaxial access network unit that possesses wireless WIFI according to claim 1; It is characterized in that; It also comprises power module; Said power module comprises mains switch, voltage stabilizing chip, voltage transitions chip and reset signal chip, and said mains switch is connected with the voltage stabilizing chip, and this voltage stabilizing chip delivery outlet is connected with the reset signal chip with the voltage transitions chip.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103051561A (en) * | 2013-01-11 | 2013-04-17 | 陕西广电网络传媒(集团)股份有限公司 | Method for acquiring control information and interactive link information on low-frequency EOC (Ethernet over Cable) terminal |
CN103067686A (en) * | 2012-12-17 | 2013-04-24 | 苏州云普通讯技术有限公司 | Upload amplified coaxial Ethernet access terminal device |
CN104469534A (en) * | 2014-10-30 | 2015-03-25 | 成都康特电子高新科技有限责任公司 | EOC terminal based on broadcast television network system |
CN105611423A (en) * | 2015-12-28 | 2016-05-25 | 苏州云普通讯技术有限公司 | System for realizing co-cable transmission of data signal and television signal to desktop based on EPON |
CN106454193A (en) * | 2016-11-11 | 2017-02-22 | 深圳创维数字技术有限公司 | Signal common-cable transmission method and system |
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CN201893798U (en) * | 2010-11-21 | 2011-07-06 | 上海大学 | Coaxial access network unit equipment of four Ethernet ports |
CN102281176A (en) * | 2011-08-18 | 2011-12-14 | 杭州讯久科技有限公司 | Multi-signal fusion access local terminal equipment and implementation method thereof |
CN202737897U (en) * | 2012-08-24 | 2013-02-13 | 苏州云普通讯技术有限公司 | Coax access network unit device with wireless WIFI |
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Patent Citations (3)
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CN201893798U (en) * | 2010-11-21 | 2011-07-06 | 上海大学 | Coaxial access network unit equipment of four Ethernet ports |
CN102281176A (en) * | 2011-08-18 | 2011-12-14 | 杭州讯久科技有限公司 | Multi-signal fusion access local terminal equipment and implementation method thereof |
CN202737897U (en) * | 2012-08-24 | 2013-02-13 | 苏州云普通讯技术有限公司 | Coax access network unit device with wireless WIFI |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103067686A (en) * | 2012-12-17 | 2013-04-24 | 苏州云普通讯技术有限公司 | Upload amplified coaxial Ethernet access terminal device |
CN103051561A (en) * | 2013-01-11 | 2013-04-17 | 陕西广电网络传媒(集团)股份有限公司 | Method for acquiring control information and interactive link information on low-frequency EOC (Ethernet over Cable) terminal |
CN103051561B (en) * | 2013-01-11 | 2015-03-25 | 陕西广电网络传媒(集团)股份有限公司 | Method for acquiring control information and interactive link information on low-frequency EOC (Ethernet over Cable) terminal |
CN104469534A (en) * | 2014-10-30 | 2015-03-25 | 成都康特电子高新科技有限责任公司 | EOC terminal based on broadcast television network system |
CN105611423A (en) * | 2015-12-28 | 2016-05-25 | 苏州云普通讯技术有限公司 | System for realizing co-cable transmission of data signal and television signal to desktop based on EPON |
CN106454193A (en) * | 2016-11-11 | 2017-02-22 | 深圳创维数字技术有限公司 | Signal common-cable transmission method and system |
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Application publication date: 20121121 |