CN1960236A - Coaxial mixed full service access network system of bidirectional optical fiber - Google Patents
Coaxial mixed full service access network system of bidirectional optical fiber Download PDFInfo
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- CN1960236A CN1960236A CN 200610024075 CN200610024075A CN1960236A CN 1960236 A CN1960236 A CN 1960236A CN 200610024075 CN200610024075 CN 200610024075 CN 200610024075 A CN200610024075 A CN 200610024075A CN 1960236 A CN1960236 A CN 1960236A
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Abstract
The access network system includes Internet, the phone net, the HFC net and an Ethernet bridge. Ethernet bridge connects with Internet, the phone net and the HFC net to multiplex the Internet signal; analog voice signal and CATV signal into digital user line signal and transfers these signals in a co-axis cable. It also separates the voice signal and data signal from the receiving up-going signal. The user terminal connects the user with the Ethernet bridge. The method separates the RF signal received from the Ethernet bridge into the data signal, the voice signal and the cable TV signal and provides to users respectively. The method also combines data signal and the voice signal sent by user into the RF signal and provides it to the Ethernet bridge. Via a co-axis cable, user terminal connects the Ethernet bridge. All ports are independent to ensure safety and privacy. Ports self-adapted with the cross or non-cross connection raises the net usability and the engineering convenience.
Description
Technical field
The present invention relates to utilize the HFC net to carry out the data communication technique field, relate more specifically to the transmission and the control of cable TV signal and baseband data signals, relate in particular to a kind of coaxial mixed full service access network system of bidirectional optical fiber.
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.
The structure of existing hfc plant.Communication between network head end and each optical node is undertaken by the distribution fiber optic cable net.Because cable network has been arranged, just can shorten the distance of cable transmission greatly, thereby reduce cost and improve transmission quality.Communication between each optical node and the user is undertaken by coaxial cable distribution net.The user who that is to say HFC net inserts mainly and is born by the coaxial cable net.
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 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.
Also having a kind of method is that the Chinese invention patent publication number is CN1268003A disclosed " is the high-speed access network that platform utilizes wireless backhaul with the coaxial net of one-way CATV ", and it transmits forward information with existing unidirectional wired coaxial cable net; Transmit the required back information of HFC net standard coaxial cable mesh portions with radio transmitting device.This high-speed access network comprises network head end, distribution fiber optic cable net, optical node, cable distribution network, user side etc.; The network head end is connected with network backbone, and is connected with a plurality of optical nodes by the distribution fiber optic cable net; Each optical node links to each other with a plurality of user sides by cable distribution network, and user side has the radio transmitting apparatus that is used to launch back information, and optical node is equipped with the radio system that is used to receive back information; Said radio system receives the back information of each user side emission in its cable system overlay area that connects, and received back information transfers back to the network head end by the bidirectional cable distribution network again.
But the above-mentioned high-speed access network that utilizes wireless backhaul, because its specific operating frequency makes its application in building run into many problems.For example: because its wireless transmission electromagnetic wave is level or vertical panelization, electromagnetic wave can be subjected to the impedance or the decay of building vertical direction (floor plates) or level (dividing wall) in building, can't guarantee the normal operation of communicating by letter.
In order to solve the above-mentioned existing problem of high-speed access network of utilizing wireless backhaul, the Chinese invention patent publication number is CN1665210A disclosed " utilizing cable tv coax to realize the method for broadband wireless access ", be to constitute by radio reception device, cable tv coax and consumer wideband wireless access/emitter, be characterized in: the electromagnetic wave signal of radio reception device is fed in the coaxial cable, electromagnetic wave is sent to user's domestic aerial by coaxial cable passing through floors or partition wall, realizes broadband wireless access.
But also there be the attenuation problem of a coaxial cable to high-frequency signal in these class methods, with regard to coaxial cable, the signal that frequency is high more, the decay that produces when it transmits is big more, therefore transmitting of radio reception device AP need be carried out carrying out up-conversion again after down-conversion is sent to user terminal, equally, for received signal, feed-in cable after user terminal carries out down-conversion reduced by up-conversion before the input of radio reception device AP again.So class methods need increase frequency converter.
Aspect the coaxial cable access altogether of Ethernet, the Chinese invention patent application publication number is that CN1499840A discloses a kind of cable TV broad band Integrated service platform, be on the basis of accurate frequency spectrum authorization control technology, further embed modem technology, and adopt the coaxial cable access technology altogether of multiuser multiplexing and Ethernet, realize that the low-cost popularization of broadband high-speed digital network inserts.The technology of specific implementation then is to finish coaxial cable and balance to the conversion between the line by the balance/imbalance translation circuit, is finished 2/4 line conversion of data channel full duplex by " mirage phantom " circuit.
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.
And in order to solve the problem of not supporting plain old telephone service in the existing HFC data access network, Huawei Tech Co., Ltd has applied for that in 2003 publication number is that " method and system of broadband access and telephone service are provided at cable TV " and the publication number of CN1567998A is two patents of CN1615013A " a kind of system that realizes broadband access at cable TV on the net " on the net.
The system of the former patent application comprises with telephone network or/and the broadband access equipment that IP network is connected; The comprehensive station of assembling is connected with described broadband access equipment, is used to transmit from the downlink data of network reception and converges upstream data and send to broadband access equipment; Comprehensive access module is connected with described comprehensive convergence module, will be multiplexed with digital subscriber line signal from data-signal and the voice signal the downlink data that comprehensive convergence module receives, and isolate data-signal and voice signal from the upstream data that receives; Optical receiver will be from optical cable receiving optical signals conversion radiofrequency signal; Radio frequency amplifier carries out processing and amplifying to the radiofrequency signal of optical receiver output; The radio frequency distributor is used to distribute the radiofrequency signal of reception; Terminal comprehensive access module, be connected with the radio frequency distributor with described comprehensive access module, the TV signal of radio frequency distributor output and the digital subscriber line signal of comprehensive access module output are mixed, and finish the conversion of digital subscriber line signal balance and non-equilibrium mode; User terminal, be connected with the comprehensive access module of described end with the user, the Signal Separation that will receive from the comprehensive access module of end be that data-signal, voice signal and cable TV signal offer the user respectively, and the data-signal that the user is sent and voice signal offer the comprehensive access module of described end after mixing.
The system of latter's patent application mainly comprises: the HFC sub-headend is a HFC data Access Network and an outside interface; TV; As the terminal of cable television network, the main CATV signal that receives from splitter; User terminal: be arranged in the user family, generally receive from the data-signal of splitter and realize the data service access function by coupled computer; The comprehensive light-gathering station that converges, it is connected with HFC data Access Network by the HFC sub-headend, and the while also is connected with the IP metropolitan area network, and effect is to carry out exchanges data with HFC data Access Network and IP metropolitan area network, carry out data processing; The duplex blender: its number is the same with the number of data insertion equipment, each duplexing blender is except all being connected with above-mentioned radio frequency amplifier access device, and duplexing blender effect is the CATV radiofrequency signal to be mixed with the data-modulated radiofrequency signal to conciliate mix; The radio frequency distribution network is used for that the radiofrequency signal of input is carried out multichannel and distributes.
Above-mentioned two kinds of systems since all be comprehensive converge before the light-gathering station access band data and and the ip voice signal, after being multiplexed with digital subscriber line signal by comprehensive access module, being transferred to terminal comprehensive access module by fiber optic network again mixes with the TV signal of radio frequency distributor output, mixed signal is transferred to user terminal by coaxial cable, user terminal goes out CATV signal, data-signal and telephone signal with the Signal Separation of receiving, offers the user and uses.Sneak into coaxial cable after user terminal also mixes the data-signal of user side and telephone signal and deliver to terminal comprehensive access module, the Signal Separation that terminal comprehensive access module is sent user side goes out the DSLAM equipment that data-signal and voice sub-signal are sent to comprehensive access module.Therefore, need make user's cost of access increase to the transforming of existing fiber broadband network and telephone network.
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.
Summary of the invention
One object of the present invention is to provide a kind of need not that existing band optical fiber network, telephone network and cable TV network are transformed, get final product the coaxial mixed full service access network system of bidirectional optical fiber of a line of multiple business such as cable TV, data access, phone to the family, make existing HFC coaxial network obtain increment, cost is reduced.
Another object of the present invention is to provide a kind of manageable coaxial mixed full service access network system of bidirectional optical fiber.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of coaxial mixed full service access network system of bidirectional optical fiber comprises existing Internet network and hfc plant, and it also comprises:
Ethernet bridge is connected with hfc plant with described Internet network, in order to merge Internet data-signal and CATV radiofrequency signal, is multiplexed with radiofrequency signal and transmits in coaxial cable and receive upstream data. signals from coaxial cable;
User terminal, be connected with described Ethernet bridge with the user, to be separated into data-signal from the radiofrequency signal that Ethernet bridge receives and the cable TV radiofrequency signal offers the user respectively, and convert the data-signal that the user sends to radiofrequency signal and offer Ethernet bridge, be connected by coaxial cable between user terminal and the Ethernet bridge.
Described Ethernet bridge has a plurality of RF distribution openings and has the Ethernet switch of a plurality of ports and a plurality of signal multiplexing/demodulation multiplexers that above-mentioned two class signals are merged.
Described a plurality of port comprises a data interface, a radio frequency interface at least.
Described user terminal comprises a signal multiplexing/demodulation multiplexer, has a data interface, a radio frequency interface.
Described signal multiplexing/demodulation multiplexer comprises that one four road ether signal is converted into conversion equipment and a high-pass and low-pass filter of two paths of signals transmission, 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, a 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.
In the system, for management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, described network management module is connected with the radiofrequency signal administration module with described Ethernet switch.
Since adopted design as above, separate between the system port of the present invention, guaranteed safety of user information and privacy; Port can effectively prevent the inside and outside loop of user, has improved the reliability of network; Port has improved the availability of network and the convenience of engineering to intersecting and non-interconnection self adaptation; The passive access of system improves the stability of system greatly, reduces the system maintenance cost.
System of the present invention compares with existing other access technology, has:
1, cost is low
System of the present invention does not need moderm at user side, only needs passive wall outlet.
2, easy for installation, do not need debugging
Simple more even user can install user installation voluntarily.
3, safeguard simply the reliability height
User side does not have active equipment to reduce active link yet, has improved MTBF.
4, reduced the intrusion noise of HFC headache
Reduced the intrusion noise in the network greatly, the user no longer needs to insert core network by the low-frequency range backward channel, user side only communicates with the multiport distributor of Ethernet bridge, and communicate by Ethernet bridge and front end, this has just reduced the intrusion noise and has brought a series of relevant issues such as fault, has effectively controlled the invasion noise.
4, significantly reduced system's operation cost, easily in inserting new user.
Corresponding the technology of the present invention, new user's access does not need any change in user side or the network.This just make the user access and disconnect quite simply, in fact in most of the cases, just a click of mouse button just can be finished automatically by system, has significantly reduced system's operation cost, newly system's access fee of user can be ignored.For the user, in the network of native system, realize that data insert, as long as PC is connected to wall outlet Ethernet interface interface, this promptly slotting both characteristics of usefulness make the user before opening this business, can carry out simple service traffics test, this puts mode whether not select the person with regard to the energy final decision.
5, exclusively enjoy the 10Mbps bandwidth, can realize that 100Mbps gets home
Although Docsis2.0 can provide data at a high speed to connect, yet the bandwidth of Docsis is shared, this characteristic limitations uplink throughput, therefore in fact its throughput is quite limited when considering an independent moderm, the maximum rate of each moderm is approximately 2Mbps.
6, there is very high fail safe in system
Can realize complete user layer network management, cut off the attack (shutoff port) of malice, realize the management of whole link.
For traditional access way, consider that from operation and capital angle opening of some users may be also not really to one's profit, and in case network of the present invention is set up, it exists for all users, is suitable for all and registers one's residence.Can directly carry out business such as IP phone.
9, enlarged the throughput of cable network, for cable network has been expanded new business prototype.
The present invention is suitable for IP, LAN, the professional IPTV of the focus by the Ethernet transmission of video and digital television on-demand etc., could realize and have only in the past by optical fiber is installed.
10, the present invention supports the comprehensive access of three major businesses (voice, data and video)
The present invention 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----20M frequency band, and cable TV signal transmits in the 47M-860M frequency band.This equipment has made full use of existing coaxial cable frequency range, has realized the transmission of multi-service signal.
Every kind of business all has its specific (special) requirements to the grade and the time delay of system service, can support the business of four kinds of different stages in the present invention, and the IP that is based on as far as possible " at a high speed " as the data business connects; The IP connection is based on virtual local area (VLAN), and speech business adopts voip technology to realize.The VoIP packet is enjoyed higher priority, has guaranteed that the time delay of network is shorter; The IP video traffic uses the multicast mode.
Description of drawings
Further describe the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is a kind of coaxial mixed full service access network system of bidirectional optical fiber structural representation of the embodiment of the invention 1, and this system can access network based on ethernet data service and cable television service.
Fig. 2 is the schematic appearance of the Ethernet bridge of the embodiment of the invention 1.
Fig. 3 is the schematic appearance of the user terminal of the embodiment of the invention 1.
Fig. 4 is a kind of principle schematic of utilizing coaxial interface to realize transmission of the embodiment of the invention 1.
Fig. 5 utilizes coaxial interface to realize the principle schematic of transmission for the another kind of the embodiment of the invention 1.
Fig. 6 is the system applies principle schematic of being furnished with network management function of the embodiment of the invention 1.
Fig. 7 is the operation principle schematic diagram of the signal multiplexing/demultiplexing of the embodiment of the invention 1.
Fig. 8 is the principle schematic of the dual-mode set-top box of the embodiment of the invention 1.
Fig. 9 is the principle schematic of the signal multiplexing/demodulation multiplexer inside of the embodiment of the invention 1.
Figure 10 is a kind of coaxial mixed full service access network system of bidirectional optical fiber structural representation of the embodiment of the invention 2, and this system can the access network based on ethernet data service, voice signal business and cable television service.
Figure 11 is the schematic appearance of the Ethernet bridge of the embodiment of the invention 2.
Figure 12 is the schematic appearance of the user terminal of the embodiment of the invention 2.
Figure 13 is a kind of principle schematic of utilizing coaxial interface to realize transmission of the embodiment of the invention 2.
Figure 14 utilizes coaxial interface to realize the principle schematic of transmission for the another kind of the embodiment of the invention 2.
Figure 15 is the system applies principle schematic of being furnished with network management function of the embodiment of the invention 2.
Figure 16 is the principle schematic that 2 one kinds of multiports of the embodiment of the invention are used.
Figure 17 is the operation principle schematic diagram of the signal multiplexing/demultiplexing of the embodiment of the invention 2.
Figure 18 is the principle schematic of three mould set-top box of the embodiment of the invention 2.
Figure 19 is the principle schematic of the signal multiplexing/demodulation multiplexer inside of the embodiment of the invention 2.
Figure 20 is the schematic diagram of a solution of the present invention.
Figure 21 is the schematic diagram of another kind of solution of the present invention.
Embodiment
Embodiment 1:
Referring to Fig. 1, a kind of coaxial mixed full service access network system of bidirectional optical fiber, comprise existing Internet network and hfc plant, Ethernet bridge Elink6212, Ethernet bridge Elink6212 is connected with hfc plant with described Internet network, in order to merge Internet signal and CATV signal, is multiplexed with radiofrequency signal, in coaxial cable, be transferred to user terminal Elink6101, and from coaxial cable, receive upstream data. signals.
Each user's user terminal Elink6101, going up different radio frequency distribution openings RF by coaxial cable with Ethernet bridge Elink6212 connects, to be separated into data-signal from the radiofrequency signal that Ethernet bridge Elink6212 receives and cable TV signal offers the user respectively, and convert the data-signal that the user sends to radiofrequency signal and offer Ethernet bridge Elink6212.
Referring to Fig. 2, the Ethernet bridge Elink6212 of embodiment 1 supports transparent 2 layers of connection of Ethernet, has 1-12 RF distribution openings and the Ethernet switch with 2+12 port (2 are used to be connected radio frequency cable) and with a plurality of multiplexing demultiplexing devices of above-mentioned two class signals merging.
In Ethernet bridge Elink6212, have a RF radio frequency and amplify plate, have a plurality of multiplexing demultiplexing devices in the RF radio frequency amplification plate, have forward Optical Receivers and backlight transceiver module and network management module between a plurality of multiplexing demultiplexing devices and Ethernet switch or the switching Ethernet transceiver module.Power supply among the Ethernet bridge Elink6212 is given forward Optical Receivers and backlight transceiver module and network management module power supply.Ethernet switch or switching Ethernet transceiver module have 10/100 Ethernet electricity mouth, and promptly data-interface has radio frequency interface on RF radio frequency amplification plate.
Ethernet bridge Elink6212 first line of a couplet RJ-45 performance index are 10/100BASE-TX self adaptation port, support ANSI/IEEE802.3u, IEEE802.3, and IEEE802.3X, IEEE802.1P supports the port status inquiry, can be used as the software arrangements port.
Ethernet bridge Elink6212 downstream interface radio-frequency performance index is:
Interface type: F type
Bandwidth of operation: 47-860MHZ
Frequency response: ± 1dB
Insert loss: 14dB
Interface impedance: 75 Ω
Reflection loss :≤-16dB (47-860M)
Ethernet bridge Elink6212 downstream interface data performance index is:
Connect speed: the 10M full duplex
Connect distance: 〉=100m
Impedance: 75 Ω
Interface type: F type
Referring to Fig. 3, the user terminal Elink6101 of embodiment 1 comprises one signal multiplexing/demodulation multiplexer, has a data-interface, a radio frequency interface.The traditional CATV radio frequency interface of the general next-door neighbour of user terminal Elink6101.It is a passive device fully, is responsible for the ethernet signal of base band is converted to the twisted-pair feeder transmission means by the coaxial transmission mode.
User terminal Elink6101 radio-frequency performance index is:
Interface type: F type
Bandwidth of operation: 47-860MHZ
Frequency response: ± 1dB
Insert loss: 14dB
Interface impedance: 75 Ω
Reflection loss :≤-16dB (47-860M)
User terminal Elink6101 data performance index is:
Connect speed: the 10M full duplex
Connect distance: 〉=100m
Impedance: 75 Ω
Between the port: independent
Interface type: intersect and non-interconnection self adaptation.
Referring to Fig. 4, this system of embodiment 1 utilizes a coaxial cable to come while transmission of data signals and cable TV signal to be linked in the system.The method of transmission of data signals has multiple, such as Cable Modem mode, HPNA mode, or the like modulation system, also can be the base band mode of not modulating in this patent.
Radiofrequency signal enters by the radio frequency interface of Ethernet bridge Elink6212, behind a filter filtering, is divided into two.One is first line of a couplet data, and by optical interface, data demodulation module connection Ethernet switch or switching Ethernet transceiver module, another distributes for the cable TV radiofrequency signal inserts signal distribution module.The multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute is transported to a plurality of signal multiplexing/demodulation multiplexers respectively and is multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the radiofrequency signal of receiving is isolated data-signal to the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 and cable TV signal offers the user respectively.The data-signal that the user sends converts radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flows to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and demultiplexes into ethernet signal and exchange in the Ethernet by Ethernet switch or switching Ethernet transceiver module from coaxial cable.
Because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo problems that causes, needing increases the Echo Cancellation functional module in Ethernet bridge Elink6212 domestic demand in order to solve.
For management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge Elink6212 in signal distribution module, network management module is with too network switch or switching Ethernet transceiver module are connected with the radiofrequency signal administration module.
Top filter, optical interface, data demodulation module and signal distribution module can be placed in aforesaid RF radio frequency together and amplify plate.
Referring to Fig. 5, the system of the light path part of embodiment 1 can adopt multiple mode to realize, can be common fiber optical transceiver, also can be more advanced EPON (ethernet passive optical network) system.Light signal enters by the optical branching device of Ethernet bridge Elink6212, and is divided into two.One is first line of a couplet data, and by optical interface, Optical Receivers connection Ethernet switch or switching Ethernet transceiver module, another distributes for the cable TV radiofrequency signal inserts signal distribution module by Optical Receivers.The multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute is transported to a plurality of signal multiplexing/demodulation multiplexers respectively and is multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the radiofrequency signal of receiving is isolated data-signal to the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 and cable TV signal offers the user respectively.The data-signal that the user sends converts radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flows to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and demultiplexes into ethernet signal and exchange in the Ethernet by Ethernet switch or switching Ethernet transceiver module from coaxial cable.
Equally, because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo problems that causes, Elink6212 increases the Echo Cancellation functional module in Ethernet bridge in order to solve.
Equally, for management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, network management module is connected with the radiofrequency signal administration module with Ethernet switch or switching Ethernet transceiver module.
Top optical branching device, Optical Receivers are in signal distribution module can be placed in aforesaid Ethernet bridge Elink6212.
Referring to Fig. 6, the first line of a couplet data of embodiment 1 connection Ethernet switch or switching Ethernet transceiver module, the cable TV radiofrequency signal inserts signal distribution module and distributes.The multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute is transported to a plurality of signal multiplexing/demodulation multiplexers respectively and is multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the radiofrequency signal of receiving is isolated data-signal to the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 and cable TV signal offers the user respectively.The data-signal that the user sends converts radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flows to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and demultiplexes into ethernet signal and exchange in the Ethernet by Ethernet switch or switching Ethernet transceiver module from coaxial cable.
Equally, because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo reflection problem that causes, have Echo Cancellation functional module in Ethernet switch in Ethernet bridge Elink6212 or the switching Ethernet transceiver module in order to solve.
Equally, for management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, network management module is connected with the radiofrequency signal administration module with Ethernet switch or switching Ethernet transceiver module.
Referring to Fig. 7, application principle for signal multiplexing/demodulation multiplexer of embodiment 1, cable TV radiofrequency signal and Ethernet data signal are transported to signal multiplexing/demodulation multiplexer by radio frequency interface on signal multiplexing/demodulation multiplexer and data-interface respectively and are multiplexed into radiofrequency signal, be transported in the coaxial cable by a radio frequency interface again, signal multiplexing/demodulation multiplexer in the user terminal Elink6101 isolates data-signal after with the radiofrequency signal of receiving and cable TV signal offers the user by data-interface and radio frequency interface respectively, the data-signal that the user sends converts radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flows to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and demultiplexes into ethernet signal and exchange in the Ethernet from coaxial cable.
Referring to Fig. 8; the user terminal Elink6101 of embodiment 1 can be a pair of mould set-top box; it comprises all parts of existing set-top box; in the box of existing set-top box, increase a signal multiplexing demodulation multiplexer; signal multiplexing/demodulation multiplexer comprises a data interface and two radio frequency interfaces; data-interface in the data-interface of signal multiplexing demodulation multiplexer and the existing set-top box dock, the radio frequency interface that a radio frequency interface and existing set-top box are interior, and another radio frequency interface is connected with coaxial cable.
Referring to Fig. 9, signal multiplexing/demodulation multiplexer of embodiment 1 comprises that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two paths of signals transmission, 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, a 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.
Embodiment 2:
Referring to Figure 10, a kind of coaxial mixed full service access network system of bidirectional optical fiber comprises existing Internet network, telephone network and hfc plant, Ethernet bridge Elink6212.Ethernet bridge Elink6212 is connected with hfc plant with described Internet network, telephone network, in order to merge Internet signal, analog voice signal and CATV signal, be multiplexed with radiofrequency signal, in coaxial cable, transmit, and isolate data-signal and voice signal in the upward signal that from coaxial cable, receives;
Each user's user terminal, going up different radio frequency distribution openings RF by coaxial cable with Ethernet bridge Elink6212 connects, to be separated into data-signal, voice signal and cable TV signal from the radiofrequency signal that Ethernet bridge Elink6212 receives and offer the user respectively, and the data-signal that the user is sent and voice signal are mixed into radiofrequency signal and offer Ethernet bridge Elink6212.
Referring to Figure 11, the Ethernet bridge Elink6212 of embodiment 2 supports transparent 2 layers of connection of Ethernet, has 1-12 RF distribution openings and the Ethernet switch with 2+12 port (2 are used to be connected radio frequency cable), a plurality of voice signal interface and with a plurality of multiplexing demultiplexing devices of above-mentioned three class signals merging.
In Ethernet bridge Elink6212, have a RF radio frequency and amplify plate, have a plurality of multiplexing demultiplexing devices in the RF radio frequency amplification plate, have forward Optical Receivers and backlight transceiver module and network management module between a plurality of multiplexing demultiplexing devices and Ethernet switch or the switching Ethernet transceiver module.Power supply among the Ethernet bridge Elink6212 is given forward Optical Receivers and backlight transceiver module and network management module power supply.Ethernet switch or switching Ethernet transceiver module have 10/100 Ethernet electricity mouth, and promptly the RJ45 interface has radio frequency interface and voice signal interface on RF radio frequency amplification plate.
Ethernet bridge Elink6212 first line of a couplet RJ-45 performance index are 10/100BASE-TX self adaptation port, support ANSI/IEEE802.3u, IEEE802.3, and IEEE802.3X, IEEE802.1P supports the port status inquiry, can be used as the software arrangements port.
Ethernet bridge Elink6212 downstream interface radio-frequency performance index is:
Interface type: F type
Bandwidth of operation: 47-860MHZ
Frequency response: ± ldB
Insert loss: 14dB
Interface impedance: 75 Ω
Reflection loss :≤-16dB (47-860M)
Ethernet bridge Elink6212 downstream interface data performance index is:
Connect speed: the 10M full duplex
Connect distance: 〉=100m
Impedance: 75 Ω
Interface type: F type
Referring to Figure 12, the user terminal Elink6101 of embodiment 2 comprises one signal multiplexing/demodulation multiplexer, has a data data interface, a radio frequency interface and a voice signal interface.The traditional CATV radio frequency interface of the general next-door neighbour of user terminal Elink6101.It is a passive device fully, is responsible for the ethernet signal of base band is converted to the twisted-pair feeder transmission means by the coaxial transmission mode.
User terminal Elink6101 radio-frequency performance index is:
Interface type: F type
Bandwidth of operation: 47-860MHZ
Frequency response: ± 1dB
Insert loss: 14dB
Interface impedance: 75 Ω
Reflection loss :≤-16dB (47-860M)
User terminal Elink6101 data performance index is:
Connect speed: the 10M full duplex
Connect distance: 〉=100m
Impedance: 75 Ω
Between the port: independent
Interface type: intersect and non-interconnection self adaptation.
Referring to Figure 13, this system of embodiment 2 utilizes a coaxial cable to come while transmission of data signals and cable TV signal to be linked in the system.The method of transmission of data signals has multiple, such as Cable Modem mode, HPNA mode, or the like modulation system, also can be the base band mode of not modulating in this patent.
Radiofrequency signal enters by the radio frequency interface of Ethernet bridge Elink6212, behind a filter filtering, is divided into two.One is first line of a couplet data, and by optical interface, data demodulation module connection Ethernet switch or switching Ethernet transceiver module, another distributes for the cable TV radiofrequency signal inserts signal distribution module.Multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute and multi-path voice signal are transported to a plurality of signal multiplexing/demodulation multiplexers respectively and are multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 is isolated data-signal and cable TV signal and voice signal with the radiofrequency signal of receiving and is offered the user respectively.Data-signal and voice signal that the user sends convert radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flow to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and voice signal and demultiplexes into ethernet signal and voice signal and exchange to Ethernet by Ethernet switch or switching Ethernet transceiver module respectively and neutralize and pass back in the telephone network from coaxial cable.
Because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo problems that causes, increase echo inhibit feature module in order to solve at Ethernet bridge Elink6212.
For management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, network management module is connected with the radiofrequency signal administration module with Ethernet switch or switching Ethernet transceiver module.
Top filter, optical interface, data demodulation module and signal distribution module can be placed in aforesaid RF radio frequency together and amplify plate.
Referring to Figure 14, the system of the light path part of embodiment 2 can adopt multiple mode to realize, can be common fiber optical transceiver, also can be more advanced EPON (ethernet passive optical network) system.
Light signal enters by the optical branching device of Ethernet bridge Elink6212, and is divided into two.One is first line of a couplet data, and by optical interface, Optical Receivers connection Ethernet switch or switching Ethernet transceiver module, another distributes for the cable TV radiofrequency signal inserts signal distribution module by Optical Receivers.Multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute and multi-path voice signal are transported to a plurality of signal multiplexing/demodulation multiplexers respectively and are multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 is isolated data-signal and cable TV signal and voice signal with the radiofrequency signal of receiving and is offered the user respectively.Data-signal and voice signal that the user sends convert radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flow to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and voice signal and demultiplexes into ethernet signal and exchange to Ethernet by Ethernet switch or switching Ethernet transceiver module and neutralize and pass back in the telephone network from coaxial cable.
Equally, because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo problems that causes, in Ethernet bridge, have the Echo Cancellation functional module in the Ethernet switch of Elink6212 or the switching Ethernet transceiver module in order to solve.
Equally, for management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, network management module is with too network switch or switching Ethernet transceiver module are connected with the radiofrequency signal administration module.
Top optical branching device, Optical Receivers are in signal distribution module can be placed in aforesaid Ethernet bridge Elink6212.
Referring to Figure 15, the first line of a couplet data of embodiment 2 connection Ethernet switch or switching Ethernet transceiver module, the cable TV radiofrequency signal inserts signal distribution module and distributes.Multichannel wired TV RF signals that multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and signal distribution module distribute and multi-path voice signal are transported to a plurality of signal multiplexing/demodulation multiplexers respectively and are multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 is isolated data-signal and cable TV signal and voice signal with the radiofrequency signal of receiving and is offered the user respectively.Data-signal and voice signal that the user sends convert radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flow to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and voice signal data and demultiplexes into ethernet signal and exchange to Ethernet by Ethernet switch or switching Ethernet transceiver module and neutralize and pass back in the telephone network from coaxial cable.
Equally, because coaxial line does not connect or the data-interface of signal multiplexing/demodulation multiplexer does not connect the echo problems that causes, Elink6212 increases echo inhibit feature module in Ethernet bridge in order to solve.
Equally, for management to user side, the signal of supervisory user end, increase a network management module and increase a radiofrequency signal administration module in Ethernet bridge in signal distribution module, network management module is with too network switch or switching Ethernet transceiver module are connected with the radiofrequency signal administration module.
Referring to Figure 16, a kind of multiport application model for embodiment 2, multichannel ethernet signal that Ethernet switch or switching Ethernet transceiver module are told and multichannel wired TV RF signals and multi-path voice signal are transported to a plurality of signal multiplexing/demodulation multiplexers respectively and are multiplexed into radiofrequency signal, be transported to signal multiplexing/demodulation multiplexer in the user terminal Elink6101 by coaxial cable, the signal multiplexing/demodulation multiplexer in the user terminal Elink6101 is isolated data-signal and cable TV signal and voice signal with the radiofrequency signal of receiving and is offered the user respectively.Data-signal and voice signal that the user sends convert radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flow to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and voice signal and demultiplexes into ethernet signal and exchange to Ethernet by Ethernet switch or switching Ethernet transceiver module and neutralize and pass back in the telephone network from coaxial cable.
Referring to Figure 17, application principle for signal multiplexing/demodulation multiplexer of embodiment 2, cable television video signal and Ethernet data signal and voice signal are transported to signal multiplexing/demodulation multiplexer by the radio frequency interface on signal multiplexing/demodulation multiplexer and data-interface and voice signal interface respectively and are multiplexed into radiofrequency signal, be transported in the coaxial cable by a radio frequency interface again, signal multiplexing/demodulation multiplexer in the user terminal Elink6101 is isolated data-signal and cable TV signal and voice signal after with the radiofrequency signal of receiving and is offered the user by data-interface and radio frequency interface and voice signal interface respectively, data-signal and voice signal that the user sends convert radiofrequency signal to by the signal multiplexing/demodulation multiplexer in the user terminal Elink6101, flow to signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 by coaxial cable.Signal multiplexing/demodulation multiplexer in the Ethernet bridge Elink6212 receives upstream data. signals and demultiplexes into ethernet signal and exchange to Ethernet and neutralize and pass back in the telephone network from coaxial cable.。
Referring to Figure 18; the user terminal Elink6101 of embodiment 2 can be one or three mould set-top box; it comprises all parts of existing set-top box and a radio frequency interface; a telephone signal interface; a video interface; a data signal interfaces; in the box of set-top box, increase a signal multiplexing demodulation multiplexer and a data exchange module; signal multiplexing/demodulation multiplexer comprises a data interface and two radio frequency interfaces and a voice signal interface; the data-interface of signal multiplexing demodulation multiplexer docks with a data interface on the data exchange module; another one data-interface on the data exchange module docks with data-interface and aforesaid data signal interfaces in the existing set-top box; radio frequency interface in a radio frequency interface and the existing set-top box; another radio frequency interface is connected with coaxial cable, and the voice signal interface is connected with telephone signal interface on the set-top box.
Referring to Figure 19, signal multiplexing/demodulation multiplexer of embodiment 2 comprises that one four road ethernet signal is converted into the conversion equipment and a high-pass and low-pass filter of two paths of signals transmission, two line caps of 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 have a radio frequency interface to connect the common port of high-pass and low-pass filter, a telephone signal interface connects the ultralow frequency end 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 and voice analog signal thus, and these three kinds of signals can be transmitted in same cable.
Referring to Figure 20, be a kind of LAN+Elink solution of the present invention.The Internet signal passes through fire compartment wall, router, switch and CAT5 fiber optic network are delivered among the Ethernet bridge Elink6212, the CATV signal is delivered among the Ethernet bridge Elink6212 by coaxial cable or optical fiber, voice signal is delivered among the Ethernet bridge Elink6212 by twisted-pair feeder, Ethernet bridge Elink6212 is in order to merge the Internet signal, voice signal and CATV signal, be multiplexed with radiofrequency signal, be transferred to user terminal Elink6101 in coaxial cable, user terminal Elink6101 will be separated into data-signal from the radiofrequency signal that Ethernet bridge Elink6212 receives, voice signal and cable TV signal offer the user respectively.
When up, data-signal that user terminal Elink6101 sends the user and voice signal are mixed into radiofrequency signal and offer Ethernet bridge Elink6212.Isolate data-signal and voice signal in the upward signal that Ethernet bridge Elink6212 receives from coaxial cable.
Referring to Figure 21, be a kind of EPON+Elink solution of the present invention.The Internet signal passes through fire compartment wall, router connects optical line terminal OLT, hfc plant directly connects optical line terminal OLT, telephone network directly connects optical line terminal OLT, the multipath light signal of optical line terminal OLT connects a plurality of optical network unit ONU respectively, optical network unit ONU meets Ethernet bridge Elink6212 by coaxial/CAT5/ optical fiber, Ethernet bridge Elink6212 is in order to merge the Internet signal, voice signal and CATV signal, be multiplexed with radiofrequency signal, be transferred to user terminal Elink6101 in coaxial cable, user terminal Elink6101 will be separated into data-signal from the radiofrequency signal that Ethernet bridge Elink6212 receives, voice signal and cable TV signal offer the user respectively.
The model that four road ether signals recited above are converted into the conversion equipment 231 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.
Network management module recited above can adopt Sprite8000.
Echo recited above suppresses module can adopt Elink6000.
More than be preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention when the function that is produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (15)
1, a kind of coaxial mixed full service access network system of bidirectional optical fiber comprises existing Internet network and hfc plant, and it is characterized in that: it also comprises:
Ethernet bridge is connected with hfc plant with described Internet network, in order to merge Internet signal and CATV signal, is multiplexed with radiofrequency signal, in coaxial cable, transmit, and from receiving upstream data. signals;
User terminal, be connected with described Ethernet bridge with the user, to be separated into data-signal and cable TV signal from the radiofrequency signal that Ethernet bridge receives and offer the user respectively, and convert the data-signal that the user sends to radiofrequency signal and offer Ethernet bridge, be connected by coaxial cable between user terminal and the Ethernet bridge.
2, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 1 is characterized in that: described Ethernet bridge has a plurality of RF distribution openings and has the Ethernet switch of a plurality of ports and a plurality of signal multiplexing/demodulation multiplexers that above-mentioned two class signals are merged.
3, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 2 is characterized in that: described a plurality of ports comprise a data interface, a radio frequency interface at least.
4, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 1, it is characterized in that: described user terminal comprises one signal multiplexing/demodulation multiplexer, has a data-interface, a radio frequency interface.
5, as claim 2 or 4 described a kind of coaxial mixed full service access network system of bidirectional optical fiber, it is characterized in that: described signal multiplexing/demodulation multiplexer comprises that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two paths of signals transmission, 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 access network system of bidirectional optical fiber comprises existing Internet network, telephone network and hfc plant, and it also comprises:
Ethernet bridge, be connected with hfc plant with described Internet network, telephone network, in order to merge Internet signal, analog voice signal and CATV signal, be multiplexed with digital subscriber line signal, in coaxial cable, transmit, and from the upward signal that receives, isolate data-signal and voice signal;
User terminal, be connected with described Ethernet bridge with the user, to be separated into data-signal, voice signal and cable TV signal from the radiofrequency signal that Ethernet bridge receives and offer the user respectively, and the data-signal that the user is sent and voice signal be mixed into radiofrequency signal and offer Ethernet bridge, is connected by coaxial cable between user terminal and the Ethernet bridge.
7, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 6 is characterized in that: described Ethernet bridge has a plurality of RF distribution openings and has the Ethernet switch of a plurality of ports and a plurality of signal multiplexing/demodulation multiplexers that above-mentioned three class signals are merged.
8, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 7 is characterized in that: described a plurality of ports comprise a data interface, a radio frequency interface and a plurality of voice signal interface at least.
9, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 6, it is characterized in that: described user terminal comprises one signal multiplexing/demodulation multiplexer, has a data-interface, a radio frequency interface and a voice signal interface.
10, as claim 7 or 9 described a kind of coaxial mixed full service access network system of bidirectional optical fiber, it is characterized in that: described signal multiplexing/demodulation multiplexer comprises that one four road ether signal is converted into the conversion equipment and a high-pass and low-pass filter of two paths of signals transmission, two line caps of described conversion equipment connect the low frequency end of high-pass and low-pass filter, four line caps connect data data interface, one radio frequency interface connects the front end of high-pass and low-pass filter, also have a radio frequency interface to connect the common port of high-pass and low-pass filter, a voice signal interface connects the ultralow frequency end 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 and voice analog signal thus, and these three kinds of signals can be transmitted in same cable.
11, as claim 2 or 7 described a kind of coaxial mixed full service access network system of bidirectional optical fiber, it is characterized in that: in above-mentioned two kinds of systems, between described a plurality of signal multiplexing/demodulation multiplexers and Ethernet switch, also have forward Optical Receivers and backlight transceiver module.
12, as claim 2 or 7 described a kind of coaxial mixed full service access network system of bidirectional optical fiber, it is characterized in that: in above-mentioned two kinds of systems, in described Ethernet bridge, also have one with signal distribution module that a plurality of signal multiplexings/the demodulation multiplexer radio frequency is connected.
13, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 12 is characterized in that: in above-mentioned two kinds of systems, described signal distribution module is radiofrequency signal distribution module or light signal distribution module.
14, as claim 2 or 7 described a kind of coaxial mixed full service access network system of bidirectional optical fiber, it is characterized in that: in above-mentioned two kinds of systems, have echo inhibit feature module in the Ethernet switch in Ethernet bridge.
15, a kind of coaxial mixed full service access network system of bidirectional optical fiber as claimed in claim 12, it is characterized in that: increase by a network management module and increase by a radiofrequency signal administration module in Ethernet bridge in signal distribution module, described network management module is connected with the radiofrequency signal administration module with described Ethernet switch.
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| WO2008122183A1 (en) * | 2007-04-06 | 2008-10-16 | Hangzhou H3C Technologies Co., Ltd. | Method and terminal for data transmission |
| CN101212647B (en) * | 2007-07-18 | 2010-06-09 | 中国科学技术大学 | Two-way HFC network based stream media service implementation method and device |
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| CN101212647B (en) * | 2007-07-18 | 2010-06-09 | 中国科学技术大学 | Two-way HFC network based stream media service implementation method and device |
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| CN102545998A (en) * | 2010-12-07 | 2012-07-04 | 中国电信股份有限公司 | Method and system for realizing independent broadband (without binding telephone) shift-down of Ethernet passive optical network user |
| CN102545998B (en) * | 2010-12-07 | 2015-07-08 | 中国电信股份有限公司 | Method and system for realizing independent broadband (without binding telephone) shift-down of Ethernet passive optical network user |
| CN102510349A (en) * | 2011-11-04 | 2012-06-20 | 刘彩声 | Three networks convergence access network |
| CN102497283A (en) * | 2011-11-24 | 2012-06-13 | 杭州华三通信技术有限公司 | Method, system and device for data transmission based on Ethernet passive coax network (EPCN) |
| CN102497283B (en) * | 2011-11-24 | 2016-06-29 | 杭州华三通信技术有限公司 | A kind of based on the data transmission method of EPCN network, system and equipment |
| CN103036708A (en) * | 2012-11-27 | 2013-04-10 | 陕西天思信息科技有限公司 | Point-to-point low frequency modulation ethernet over coax (EOC) device |
| CN103036708B (en) * | 2012-11-27 | 2015-08-05 | 陕西天思信息科技有限公司 | A kind of point-to-point low frequency modulations EOC equipment |
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| CN103795945A (en) * | 2014-03-09 | 2014-05-14 | 成都蒲江珂贤科技有限公司 | Household area type wireless signal transmitter |
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