CN102510485B

CN102510485B - Next-generation broadcasting local-side controller modified by cable television network three-network fusion

Info

Publication number: CN102510485B
Application number: CN2011103286168A
Authority: CN
Inventors: 袁发农; 张怡; 叶黎达; 饶思霆
Original assignee: CHANGSHU GAOSHIDA OPTOELECTRONIC TECHNOLOGY Co Ltd
Current assignee: Suzhou gaoshida information Polytron Technologies Inc
Priority date: 2011-10-26
Filing date: 2011-10-26
Publication date: 2013-12-11
Anticipated expiration: 2031-10-26
Also published as: CN102510485A

Abstract

The invention discloses a next-generation broadcasting local-side controller modified by cable television network three-network fusion and belongs to the technical field of cable televisions. The next-generation broadcasting local-side controller comprises EOC (Ethernet Over Cable) local-side modules 1-4, radio frequency cables JP1-JP4, radio frequency seats J1-J7, joints IN1-IN4, OUT1-OUT4, AC60VIN, branch distribution plug-in units FP/FZ1-FP/FZ3, inductors L1-L36, inductors 1L1-1L8, overcurrent extension sockets CP1-CP8, discharge tubes D1-D9, capacitors C1-C29 and capacitors CC1-CC56. The next-generation broadcasting local-side controller has the advantages of small noise aggregation, high provided bandwidth, low average modification cost for each family and high reliability, is convenient in upgrade and expansion, and conforms to IP (Internet Protocol) base.

Description

The Next generation broadcasting network local controller of cable TV network integration of three networks transformation

Technical field

the present invention relates to a kind of NGB(Next Generation Broadcasting for cable TV network integration of three networks transformation, Next generation broadcasting network) local side controller, belong to the CATV Technology field, especially hybrid fiber coax EOC(Ethernet Over Cable ethernet coaxial cable transmission head end) network rebuilding a kind of based on cable TV transmitted in both directions equipment.

Background technology

on December 4, in, the Department of Science and Technology and General Bureau of Radio, Film and Television sign " national high performance wide-band-message net and Chinese Next generation broadcasting network autonomous innovation cooperation agreement book " jointly, propose first the concept of NGB in " cooperation agreement book ", indicated the formal departure in China Broadcast & Television NGB epoch.In the Executive Meeting of the State Council that 2010 beginning of the years, the Premier Wen Jiabao held, determine to accelerate to advance the integration of three networks of telecommunications network, broadcasting and television network and the Internet, the interim target that two steps are walked has been proposed: 2010 ~ 2012 in meeting, the mutual entry pilot, explore and form the standardized and orderly policy system of carrying out of the integration of three networks and the system mechanism of ensureing.2013 ~ 2015, sum up to promote the pilot experience, round Realization integration of three networks development, the popularization and application fused business, basically form the network industry general layout of adequate competition.Therefore applicant's integration of three networks local side controller meets guide " integration of three networks evolution technology based on the new network architectural framework " requirement fully.The NGB local side controller is the network intermediate products of broadcasting and TV NGB networking, and cable TV signal and data-signal are merged, and realizes transmission cable TV and data communication service in original hfc plant.Develop the integral telecommunication business by cable TV, cable TV network, except transmitting TV programme, also possesses the functions such as online, data transmission, video request program, household's IT application.1997 after the DOCSIS1.0 issue, domestic and international HFC (Hybrid Fiber Coax, hybrid fiber coax) the network bi-directional transformation is mainly based on North America cable TV modulator-demodulator product standard (DOCSIS), the equipment such as CMTS, upconverter, Operation & Maintenance System server (Oss Server) and cable modem (CM, Cable Modem) to be set on the basis of hfc plant system configuration realize transmission CATV signal and data communication service in hfc plant.But the CMTS technology can only be carried out data communication service in the hfc plant system, can not realize common telephone service etc., Shortcomings on multi-service realizes, improvement cost is too high, solve simultaneously upstream noise converge the technical support that needs in a short time also difficulty the reason such as properly settle, cause from the whole nation on the whole, the utilization of DOCSIS technology is also unsuccessful.This technology is except the higher share of the North America DOCSIS standard access way occupation ratio more sparse in population distribution simultaneously, in Asia and other people are mouthful than the area of comparatively dense, relatively seldom, this enforcement in several years of domestic radio and TV operator is also indicating that the DOCSIS standard is difficult to become the bidirectional rebuilding technology of main flow in China to the number of users of DOCSIS standard.Wherein:

cMTS: being the data access local side apparatus of hfc plant, is the connection device that data are transmitted in hfc plant, has been mainly used in forwarding, protocol processes and the rf modulations demodulation function of data in data communication network;

upconverter: being arranged in CMTS, is the frequency conversion device of hfc plant, is mainly used in the descending analog intermediate frequency signal of CMTS output is converted on arbitrary television channel of CATV;

oss Server: be the management equipment of whole system and network, move required various service supports for system is provided, as DHCP, TFTP, TOD, LOG service function etc. are provided for system;

cM: be connected with user terminal with hfc plant, be mainly used in data retransmission, protocol processes and modulation /demodulation function etc. between hfc plant and user terminal.

but the CMTS technology can only be carried out data communication service in the hfc plant system, can not realize common telephone service etc., Shortcomings on multi-service realizes.Simultaneously, use the CMTS technology to carry out data communication service in the hfc plant system, also have following some technical problem:

1. noise collection effect: for most of cable television operators, upstream noise is a ubiquitous problem, especially at low-frequency band (<65MHz).Common this noise is by electric motor, thunder and lightning, HAM, shortwave broadcasting terminal box in sunspot and user family even, imbed the cable quality in wall, private connects non-standard component, the situations such as all kinds of interface adhesive plaster of family connection line cause, it will destroy the transfer of data of data feedback channel (oppositely return path), so that reduce user's communication quality, especially under the real time business situations such as video or IP speech, noise jamming will cause transfer of data time delay and shake, cause video image distortion or speech discontinuous.This just requires the coaxial fitting in hfc plant to have very high electrical connection quality coefficient, and maintenance and operation troubles get rid of the technical support that needs China's most area in a short time also difficulty properly settle.

. bandwidth is low: adopt CMTS to carry out bidirectional rebuilding, need carry out bidirectional rebuilding (increasing reverse transmitter module, reverse amplification module) to optical receiver and amplifier, also need to add the equipment such as backlight receiver and upconverter.Its downlink transfer speed is 160 bps, and uplink transmission rate is that share at 120M bps 100 families, and each household only has descending 1.6 bps and up 1.2M bps.A little less than limitation is CMTS equipment bag transfer capability, pps up to ten thousand are generally only arranged, can't meet growing high broadband services demand.In addition, CMTS device data function is simple, simple medium access control sublayer agreement (MAC is only arranged, Media Access Control) learning management, the bridges forward ability, building of agreement (IP, Internet Protocol) the routing device finishing service platform interconnected between the external network of need.

. not meeting IPization trend: CMTS and adopt many-valued quadrature amplitude modulation (MQAM) modulation system, be the analog network of transmission radio-frequency carrier signal in essence, and network IPization runs in the opposite direction with the ether networking.

. cost is high per family: although CMTS covering cost is low, the user need to be equipped with CM and do broadband access and online, and price comparison is high.The project up-front investment is large, need to carry out bidirectional rebuilding to the transmission equipment in existing hfc plant.After the userbase development, many users of CMTS share the 38M bandwidth, can not meet the use of a large number of users, and cost is still higher per family.

. be not easy to upgrade expanding: because the channel that interactive service takies is too much unsuitable, general descending arranges 8 channels.Corresponding relation due to CMTS and optical sender, if each optical node is served 100 families, two-way 2 channels (during descending employing 64QAM modulation, 38Mdps is shared at 50 families) that respectively take, 1 optical sender can only be with 4 optical nodes, can only select the 6mW optical sender like this.If 1 sub-headend service 20,000 family, just need 50 optical senders and 50 8 channel C MTS, 20,000 CM.This mode headend equipment enormous amount, the maintenance management complexity, cause great pressure to the upgrade expanding of rear end IP metropolitan area network.

Summary of the invention

the objective of the invention is to provide a kind of Next generation broadcasting network local controller of cable TV network integration of three networks transformation, its noise collection effect is little, and the bandwidth provided is high, meets IPization, and improvement cost is lower per family, is convenient to upgrade expanding, and reliability is high.

the objective of the invention is to reach like this, a kind of Next generation broadcasting network local controller of cable TV network integration of three networks transformation, comprise EOC local side module 1-4, radio frequency line JP1-JP4, radio frequency seat J1-J7, joint IN1-IN4, OUT1-OUT4, AC60V IN, finger assignments plug-in unit FP/FZ1-FP/FZ3, inductance L 1-L36, inductance 1L1-1L8, cross electric socket CP1-CP8, discharge tube D1-D9, capacitor C 1-C29 and capacitor C C1-CC56, the end of optical receiver delivery outlet 1 jointing IN1, another termination capacitor C 2 of joint IN1, discharge tube D2, the end of inductance 1L2, the other end ground connection of discharge tube D2, another termination capacitor C 11 of inductance 1L2, cross the end of electric socket CP2, the other end ground connection of capacitor C 11, another termination inductance L 4 of capacitor C 2, the end of capacitor C C4, the other end ground connection of inductance L 4, another termination inductance L 3 of capacitor C C4, the end of capacitor C C3, the end of another termination capacitor C C7 of inductance L 3, the other end ground connection of capacitor C C7, another termination inductance L 2 of capacitor C C3, the end of capacitor C C2, the end of another termination capacitor C C6 of inductance L 2, the other end ground connection of capacitor C C6, another termination inductance L 1 of capacitor C C2, the end of capacitor C C1, the end of another termination capacitor C C5 of inductance L 1, the other end ground connection of capacitor C C5, another termination inductance L 5 of capacitor C C1, one end of capacitor C 1, another edge joint OUT1 of capacitor C 1, the end of discharge tube D1, the end of inductance 1L1, the other end ground connection of discharge tube D1, another termination capacitor C 9 of inductance 1L1, cross the end of electric socket CP1, the other end ground connection of capacitor C 9, the end of optical receiver delivery outlet 2 jointing IN2, another termination capacitor C 4 of joint IN2, discharge tube D4, the end of inductance 1L4, the other end ground connection of discharge tube D4, another termination capacitor C 15 of inductance 1L4, cross the end of electric socket CP4, the other end ground connection of capacitor C 15, another termination inductance L 13 of capacitor C 4, the end of capacitor C C18, the other end ground connection of inductance L 13, another termination inductance L 12 of capacitor C C18, the end of capacitor C C17, the end of another termination capacitor C C21 of inductance L 12, the other end ground connection of capacitor C C21, another termination inductance L 11 of capacitor C C17, the end of capacitor C C16, the end of another termination capacitor C C20 of inductance L 11, the other end ground connection of capacitor C C20, another termination inductance L 10 of capacitor C C16, the end of capacitor C C15, the end of another termination capacitor C C19 of inductance L 10, the other end ground connection of capacitor C C19, another termination inductance L 14 of capacitor C C15, one end of capacitor C 3, another edge joint OUT2 of capacitor C 3, discharge tube D3, the end of inductance 1L3, the other end ground connection of discharge tube D3, another termination capacitor C 13 of inductance 1L3, cross the end of electric socket CP3, the other end ground connection of capacitor C 13, the end of optical receiver delivery outlet 3 jointing IN3, another termination capacitor C 6 of joint IN3, discharge tube D6, the end of inductance 1L6, the other end ground connection of discharge tube D6, another termination capacitor C 19 of inductance 1L6, cross the end of electric socket CP6, the other end ground connection of capacitor C 19, another termination inductance L 22 of capacitor C 6, the end of capacitor C C32, the other end ground connection of inductance L 22, another termination inductance L 21 of capacitor C C32, the end of capacitor C C31, the end of another termination capacitor C C35 of inductance L 21, the other end ground connection of capacitor C C35, another termination inductance L 20 of capacitor C C31, the end of capacitor C C30, the end of another termination capacitor C C34 of inductance L 20, the other end ground connection of capacitor C C34, another termination inductance L 19 of capacitor C C30, the end of capacitor C C29, the end of another termination capacitor C C33 of inductance L 19, the other end ground connection of capacitor C C33, another termination inductance L 23 of capacitor C C29, one end of capacitor C 5, another edge joint OUT3 of capacitor C 5, the end of discharge tube D5, the end of inductance 1L5, the other end ground connection of discharge tube D5, another termination capacitor C 17 of inductance 1L5, cross the end of electric socket CP5, the other end ground connection of capacitor C 17, the end of optical receiver delivery outlet 4 jointing IN4, another termination capacitor C 8 of joint IN4, discharge tube D8, the end of inductance 1L8, the other end ground connection of discharge tube D8, another termination capacitor C 23 of inductance 1L8, cross the end of electric socket CP8, the other end ground connection of capacitor C 23, another termination inductance L 31 of capacitor C 8, the end of capacitor C C46, the other end ground connection of inductance L 31, another termination inductance L 30 of capacitor C C46, the end of capacitor C C45, the end of another termination capacitor C C49 of inductance L 30, the other end ground connection of capacitor C C49, another termination inductance L 29 of capacitor C C45, the end of capacitor C C44, the end of another termination capacitor C C48 of inductance L 29, the other end ground connection of capacitor C C48, another termination inductance L 28 of capacitor C C44, the end of capacitor C C43, the end of another termination capacitor C C47 of inductance L 28, the other end ground connection of capacitor C C47, another termination inductance L 32 of capacitor C C43, one end of capacitor C 7, another edge joint OUT4 of capacitor C 7, discharge tube D7, the end of inductance 1L7, the other end ground connection of discharge tube D7, another termination capacitor C 21 of inductance 1L7, cross the end of electric socket CP7, the other end ground connection of capacitor C 21, an end of the termination inductance L 9 of radio frequency seat J4, the end of another termination capacitor C C10 of inductance L 9, another termination inductance L 8 of capacitor C C10, the end of capacitor C C9, the end of another termination capacitor C C14 of inductance L 8, the other end ground connection of capacitor C C14, another termination inductance L 7 of capacitor C C9, the end of capacitor C C8, the end of another termination capacitor C C13 of inductance L 7, the other end ground connection of capacitor C C13, another termination inductance L 6 of capacitor C C8, the end of capacitor C C11, the other end of inductance L 5, the other end ground connection of capacitor C C11, the end of another termination capacitor C C12 of inductance L 6, the other end ground connection of capacitor C C12, one end of the termination inductance L 18 of radio frequency seat J5, the end of another termination capacitor C C24 of inductance L 18, another termination inductance L 17 of capacitor C C24, the end of capacitor C C23, the end of another termination capacitor C C28 of inductance L 17, the other end ground connection of capacitor C C28, another termination inductance L 16 of capacitor C C23, the end of capacitor C C22, the end of another termination capacitor C C27 of inductance L 16, the other end ground connection of capacitor C C27, another termination inductance L 15 of capacitor C C22, the end of capacitor C C25, the other end of inductance L 14, the other end ground connection of capacitor C C25, the end of another termination capacitor C C26 of inductance L 15, the other end ground connection of capacitor C C26, one end of the termination inductance L 27 of radio frequency seat J6, the end of another termination capacitor C C38 of inductance L 27, another termination inductance L 26 of capacitor C C38, the end of capacitor C C37, the end of another termination capacitor C C42 of inductance L 26, the other end ground connection of capacitor C C42, another termination inductance L 25 of capacitor C C37, the end of capacitor C C36, the end of another termination capacitor C C41 of inductance L 25, the other end ground connection of capacitor C C41, another termination inductance L 24 of capacitor C C36, the end of capacitor C C39, the other end of inductance L 23, the other end ground connection of capacitor C C39, the end of another termination capacitor C C40 of inductance L 24, the other end ground connection of capacitor C C40, one end of the termination inductance L 36 of radio frequency seat J7, the end of another termination capacitor C C52 of inductance L 36, another termination inductance L 35 of capacitor C C52, the end of capacitor C C51, the end of another termination capacitor C C56 of inductance L 35, the other end ground connection of capacitor C C56, another termination inductance L 34 of capacitor C C51, the end of capacitor C C50, the end of another termination capacitor C C55 of inductance L 34, the other end ground connection of capacitor C C55, another termination inductance L 33 of capacitor C C50, the end of capacitor C C53, the other end of inductance L 32, the other end ground connection of capacitor C C53, the end of another termination capacitor C C54 of inductance L 33, the other end ground connection of capacitor C C54, joint AC60V IN takes over the other end of electric socket CP1-CP8, discharge tube D9, capacitor C 10, C12, C14, C16, C18, C20, C22, C24, the end of C25-C29, discharge tube D9, capacitor C 10, C12, C14, C16, C18, C20, C22, C24, the other end ground connection of C25-C29, radio frequency seat J4, the other end of J5 is connected with two outputs of distribution branch plug-in unit FP/FZ2 respectively, radio frequency seat J6, the other end of J7 is connected with two outputs of distribution branch plug-in unit FP/FZ3 respectively, the end of the input termination radio frequency seat J2 of distribution branch plug-in unit FP/FZ2, the end of the input termination radio frequency seat J3 of distribution branch plug-in unit FP/FZ3, radio frequency seat J2, the other end of J3 is connected with two outputs of distribution branch plug-in unit FP/FZ1 respectively, the input of distribution branch plug-in unit FP/FZ1 is connected with the end of radio frequency seat J1, radio frequency line JP1-JP4 is connected with the output of EOC local side module 1-4 respectively, and radio frequency line JP1 connects the other end of radio frequency seat J1.

the present invention is owing to having adopted above technical scheme, and its noise collection effect is little, and the bandwidth provided is high, meets IPization, and improvement cost is lower per family, is convenient to upgrade expanding, and reliability is high.

The accompanying drawing explanation

fig. 1 is schematic diagram of the present invention.

Embodiment

local side controller for the cable TV EOC network rebuilding of the present invention is realized transmitted in both directions after Data Base band signal and CATV signal are mixed on the coaxial cable of cable television HFC net, will be transformed into two-way a, broadband, the digitized novel access network that can adapt to multimedia service on the catv network of One-to-All Broadcast formula.According to the NGB demand, broadcasting and TV are at coming 10 years, for different stages of development, user's bandwidth can be from 5-10Mbps > 20-30Mbps > 100Mbps is progressive, to guarantee that the domestic consumer can enjoy the data business of networking of 1 tunnel HDTV (High-Definition Television), the clear TV of 2 road sign and 4M simultaneously, this equipment has wide covering and characteristics fast cheaply, takes full advantage of the legacy network resource, the current network of need not upgrading, can be covered the user in whole community or building as long as single-point is just installed.According to actual conditions, only the area that demand is arranged is installed, do not need disposable deployed with devices to be put in place, each household networking cost is equivalent to 50% left and right in current telecommunications ADSL broadband, and bandwidth is 10 times of ADSL, is enough to meet the business demand of following several years.Ustomer premises access equipment can roll and drops into along with user's increase, can install as required, invest, and recovery of the capital has very strong predictable.

referring to accompanying drawing: NGB local side controller circuit is that the RF signal of telecommunication of optical receiver module output outputs to hybrid circuit through the NGB local side controller, optical network unit (ONU) outputting data signals is to the NGB local side controller, arrive hfc plant through hybrid circuit output radio-frequency signal of wired TV and data-signal, finally be transferred to each cable TV subscriber.Optical receiver delivery outlet 1 jointing IN1 input radio frequency signal, joint IN1 is through capacitor C 2, the high-pass filtering circuit of capacitor C 2 output signals through being formed by capacitor C C1-CC7, inductance L 1-L4, output 47-862MHz radiofrequency signal is to capacitor C 1, the low-pass filter circuit outputting data signals that radio frequency seat J4 outputting data signals process is comprised of capacitor C C8-CC14, inductance L 5-L9 is to capacitor C 1, and capacitor C 1 output mixed signal arrives hfc plant by joint OUT1; Optical receiver delivery outlet 2 jointing IN2 input radio frequency signals, joint IN2 is through capacitor C 4, the high-pass filtering circuit of capacitor C 4 output signals through being formed by capacitor C C15-CC21, inductance L 10-L13, output 47-862MHz radiofrequency signal is to capacitor C 3, the low-pass filter circuit outputting data signals that radio frequency seat J5 outputting data signals process is comprised of capacitor C C22-CC28, inductance L 14-L18 is to capacitor C 3, and capacitor C 3 output mixed signals arrive hfc plant by joint OUT2; Optical receiver delivery outlet 3 jointing IN3 input radio frequency signals, joint IN3 is through capacitor C 6, the high-pass filtering circuit of capacitor C 6 output signals through being formed by capacitor C C29-CC35, inductance L 19-L22, output 47-862MHz radiofrequency signal is to capacitor C 5, the low-pass filter circuit outputting data signals that radio frequency seat J6 outputting data signals process is comprised of capacitor C C36-CC42, inductance L 23-L27 is to capacitor C 5, and capacitor C 5 output mixed signals arrive hfc plant by joint OUT3; Optical receiver delivery outlet 4 jointing IN4 input radio frequency signals, joint IN4 is through capacitor C 8, the high-pass filtering circuit of capacitor C 8 output signals through being formed by capacitor C C43-CC49, inductance L 28-L31, output 47-862MHz radiofrequency signal is to capacitor C 7, the low-pass filter circuit outputting data signals that radio frequency seat J7 outputting data signals process is comprised of capacitor C C50-CC56, inductance L 32-L36 is to capacitor C 7, and capacitor C 7 output mixed signals arrive hfc plant by joint OUT4.When the user is less, 1 mouthful of the RJ of optical network unit ONU connects EOC local side module 1 by netting twine, the data-signal of EOC local side module 1 output modulation, the input that connects radio frequency seat J1 by radio frequency line JP1, radio frequency seat J1 outputting data signals is to the input of distribution branch plug-in unit FP/FZ1, the output outputting data signals of distribution branch plug-in unit FP/FZ1 is to the input of distribution branch plug-in unit FP/FZ2, the output outputting data signals of distribution branch plug-in unit FP/FZ2 is to radio frequency seat J4, another output outputting data signals of distribution branch plug-in unit FP/FZ2 is to radio frequency seat J5, another output outputting data signals of distribution branch plug-in unit FP/FZ1 is to the input of distribution branch plug-in unit FP/FZ3, the output outputting data signals of distribution branch plug-in unit FP/FZ3 is to radio frequency seat J6, another output outputting data signals of distribution branch plug-in unit FP/FZ3 is to radio frequency seat J7.When the user is more, the RJ 1 of optical network unit ONU, 2 mouthfuls connect respectively EOC local side module 1 by netting twine, EOC local side module 2, pull out distribution branch plug-in unit FP/FZ1, the data-signal of EOC local side module 1 output modulation, the input that connects radio frequency seat J2 by radio frequency line JP1, radio frequency seat J2 outputting data signals is to the input of distribution branch plug-in unit FP/FZ2, the output outputting data signals of distribution branch plug-in unit FP/FZ2 is to radio frequency seat J4, another output outputting data signals of distribution branch plug-in unit FP/FZ2 is to radio frequency seat J5, the data-signal of EOC local side module 2 output modulation, the input that connects radio frequency seat J3 by radio frequency line JP2, radio frequency seat J3 outputting data signals is to the input of distribution branch plug-in unit FP/FZ3, the output outputting data signals of distribution branch plug-in unit FP/FZ3 is to radio frequency seat J6, another output outputting data signals of distribution branch plug-in unit FP/FZ3 is to radio frequency seat J7.When the user completely covers, the RJ 1-4 mouth of optical network unit ONU connects respectively EOC local side module 1-4 by netting twine, pull out distribution branch plug-in unit FP/FZ1-FP/FZ3, the data-signal of EOC local side module 1 output modulation, the input that connects radio frequency seat J4 by radio frequency line JP1, radio frequency seat J4 outputting data signals is to inductance L 9, the data-signal of EOC local side module 2 output modulation, the input that connects radio frequency seat J5 by radio frequency line JP2, radio frequency seat J5 outputting data signals is to inductance L 18, the data-signal of EOC local side module 3 output modulation, the input that connects radio frequency seat J6 by radio frequency line JP3, radio frequency seat J6 outputting data signals is to inductance L 27, the data-signal of EOC local side module 4 output modulation, the input that connects radio frequency seat J7 by radio frequency line JP4, radio frequency seat J7 outputting data signals is to inductance L 36, joint AC60V IN, inductance 1L1-1L8, mistake electric socket CP1-CP8, capacitor C 9-C29, discharge tube D1-D9 form interchange 60V feed and lightning prevention circuit, according to network design requirement, select the electric socket of corresponding mistake to determine the feed situation of network.Wherein EOC local side module 1-4 is the modular assembly that ethernet signal is connected with the ethernet user by coaxial cable distribution net after the complex process such as modulation /demodulation, JP1-JP4 is 75 Ω impedance one sideband nut radio frequency lines, J1-J7 is the threaded radio frequency seat of 75 Ω impedance, FP/FZ1-FP/FZ3 is the distribution branch plug-in unit, L1-L36 is air core inductor, 1L1-1L8 is AC60V AC overcurrent inductance, IN1-IN4, OUT1-OUT4, AC60V IN is joint, CP1-CP8 is that the AC60V feed is crossed electric socket, D1-D9 is discharge tube, CC1-CC56 is high frequency capacitance, C1-C24 is the high pressure resistant Leaded Ceramic Disc Capacitor of high frequency, C25-C29 is the high pressure resistant electric capacity of the dacron of high frequency.

change is the general trend of information network development.The transmission of a new generation's encoding and decoding technique all is based on the IP form, so the necessary IPization of front end, and front end IPization must drive the IPization of transmission network.The present invention is the CATV Two-way Transmission Network equipment according to the up-to-date development of the NGB of SARFT(The State Administration of Radio and Television) television network broadcast requirement, its inner integrated optical receiver module, the ONU module of transfer of data, EOC of CATV transmission, the head end module, EPON(Ethernet Passive Optical Network, ethernet passive optical network) 1 product of network technology Two-way Network transformation, its following points technical advantage:

1. noise collection effect: the present invention has adopted HomePlug (plug-in alliance of family) AV technical standard, in this frequency range, 2351 subcarriers have been divided, each subcarrier takies and is about 24.414kHz, adopt anti-interference stronger OFDM modulation system at present, in 2351 subcarriers that use at its working frequency range, each subcarrier all can carry out separately BPSK, QPSK, 8QAM, 16QAM, 64QAM, 256QAM, 1024QAM and 4096QAM modulation, in OFDM, each subcarrier spectrum has 1/2 overlapping quadrature, improved like this availability of frequency spectrum of OFDM modulation system, adopted again Turbo FEC error checking simultaneously, promoted preferably the antijamming capability of system.

. provide the OLT equipment of very high bandwidth: EPON can transmit the 10G bandwidth at main line, 32 ONU equipment of maximum support, can better support future network construction and planning and development.The message transmission rate of NGB local side controller can reach 250-350M bps, is tens times of CMTS.

. meet the IPization trend: at down direction, adopted time-division multiplex technology (TDM), data-signal is broadcast to each terminal equipment, and terminal can make a decision voluntarily on physical layer, receives to it self Frame, abandons those Frames to other terminal.At up direction, adopt the EoCMA mode, combine the advantage of tradition without management CSMA and TDMA, EoCMA has utilized the simple and flexible of CSMA, the assurance bandwidth of TDMA mode can be provided simultaneously, the generation that especially can avoid conflict well in multi-terminal network, thus the entire system throughput improved.

. cost is relatively low per family: can take full advantage of coaxial cable, branch distributor resource on existing network, and the construction of need not registering one's residence, construction volume significantly reduces, and transformation speed is fast.But cross-over connection subscriber's amplifier and trunk amplifier, therefore do not need to carry out the network rebuilding.The transformation of can " fixing a point ", can take optical node even amplifier transformed as unit, flexible, thus realize developing at a progressive speed.At the optical fiber Access Layer, adopt passive splitter to realize networking, fully save the fiber optic backbone resource.

. be convenient to upgrade expanding: system has good business expansion and network upgrade ability, and network can be expanded according to the growth of customer volume, and bandwidth also can smooth upgrade.To the local side resource occupation seldom, the degree of modularity is high for the EPON system, and the system initial stage drops into low, and easily, rate of return on investment is high in expansion.When the initial stage, the user was less, adopt 1 EOC local side module, register one's residence bandwidth and the ever-increasing requirement of number of users along with integration of three networks broadcasting and TV NGB different phase, increase EOC local side module in equipment, can realize at most 4 EOC local side modules, guarantee that user's bandwidth is progressive from 5-10Mbps, 20-30Mbps, final 100Mbps.The EPON system is the technology faced the future, and most of EPON systems are all multiple service platforms, for to the complete IP network transition being one, well selects.

. fail safe, reliability are high, maintainable good: downlink data is adopted to 128-bit AES coding encrypting, guarantee that each user isolates fully, for preventing that illegal ONU is connected to network and steals data, need the authentication of ONU to be authorized, guarantee legal ONU registration.The EPON system is two layers of switching system, for better ensureing the safety of user profile, system, supports Private VLAN to realize two layers of isolation, each user's that adequately protects information security.Can avoid the malicious attack of automatic network to cause user network congested at the specific broadcast packet filtering rule of definition, the broadcast packet control law filters out the broadcast attack of those malice by the threshold value of definition broadcast packet, is that system and customer service maintenance are stable.Adopt high-quality device, can adapt to outdoor high and low temperature applied environment.The EOC head end of inside of the present invention is managed concentratedly user terminal, and very strong line diagnosis function is provided.

. QoS (quality of Service, service quality) guarantee: for different business such as Internet access to netwoks business, video on demand business, VoIP speech businesses, new generation product can identify or the priority of the automatic distinguishing different business such as IP ToS by VLAN, and can, according to different user or cell scenario demand, guarantee that the business of high priority is preferential.

8, up-downgoing speed limit: for the difference of paying customer's grade, can set different flow restriction for the different brackets user, allocated bandwidth is flexible, serves guaranteed.

wherein:

ePON: being ethernet passive optical network, is the best supporting body of CHINA RFTCOM Co Ltd digitlization, fiberize, IPization, and it is comprised of Optical Network Terminal (OLT), optical network unit (ONU), passive optical splitter (ODN);

oLT: be Optical Network Terminal, responsible EPON system external resource is connected with the terminal use's, converges external business, coordinates far-end ONU, sends " door message (Gates) " and is used for distributing time slot to ONU;

oNU: be optical network unit, be responsible for user's access, the covering of business, adopt " report message (Reports) " to obtain time slot or request time slot to OLT;

eOC: being ethernet coaxial cable transmission head end, is that ethernet signal is transferred to the ethernet user by coaxial cable distribution net after the complex process such as modulation /demodulation.

Claims

1. a kind of Next generation broadcasting network local controller of cable TV network integration of three networks transformation, is characterized in that comprising EOC local side module 1-4, radio frequency line JP1-JP4, radio frequency seat J1-J7, joint IN1-IN4, OUT1-OUT4, AC60V IN, finger assignments plug-in unit FP/FZ1-FP/FZ3, inductance L 1-L36, inductance 1L1-1L8, cross electric socket CP1-CP8, discharge tube D1-D9, capacitor C 1-C29 and capacitor C C1-CC56, the end of optical receiver delivery outlet 1 jointing IN1, another termination capacitor C 2 of joint IN1, discharge tube D2, the end of inductance 1L2, the other end ground connection of discharge tube D2, another termination capacitor C 11 of inductance 1L2, cross the end of electric socket CP2, the other end ground connection of capacitor C 11, another termination inductance L 4 of capacitor C 2, the end of capacitor C C4, the other end ground connection of inductance L 4, another termination inductance L 3 of capacitor C C4, the end of capacitor C C3, the end of another termination capacitor C C7 of inductance L 3, the other end ground connection of capacitor C C7, another termination inductance L 2 of capacitor C C3, the end of capacitor C C2, the end of another termination capacitor C C6 of inductance L 2, the other end ground connection of capacitor C C6, another termination inductance L 1 of capacitor C C2, the end of capacitor C C1, the end of another termination capacitor C C5 of inductance L 1, the other end ground connection of capacitor C C5, another termination inductance L 5 of capacitor C C1, one end of capacitor C 1, another edge joint OUT1 of capacitor C 1, the end of discharge tube D1, the end of inductance 1L1, the other end ground connection of discharge tube D1, another termination capacitor C 9 of inductance 1L1, cross the end of electric socket CP1, the other end ground connection of capacitor C 9, the end of optical receiver delivery outlet 2 jointing IN2, another termination capacitor C 4 of joint IN2, discharge tube D4, the end of inductance 1L4, the other end ground connection of discharge tube D4, another termination capacitor C 15 of inductance 1L4, cross the end of electric socket CP4, the other end ground connection of capacitor C 15, another termination inductance L 13 of capacitor C 4, the end of capacitor C C18, the other end ground connection of inductance L 13, another termination inductance L 12 of capacitor C C18, the end of capacitor C C17, the end of another termination capacitor C C21 of inductance L 12, the other end ground connection of capacitor C C21, another termination inductance L 11 of capacitor C C17, the end of capacitor C C16, the end of another termination capacitor C C20 of inductance L 11, the other end ground connection of capacitor C C20, another termination inductance L 10 of capacitor C C16, the end of capacitor C C15, the end of another termination capacitor C C19 of inductance L 10, the other end ground connection of capacitor C C19, another termination inductance L 14 of capacitor C C15, one end of capacitor C 3, another edge joint OUT2 of capacitor C 3, discharge tube D3, the end of inductance 1L3, the other end ground connection of discharge tube D3, another termination capacitor C 13 of inductance 1L3, cross the end of electric socket CP3, the other end ground connection of capacitor C 13, the end of optical receiver delivery outlet 3 jointing IN3, another termination capacitor C 6 of joint IN3, discharge tube D6, the end of inductance 1L6, the other end ground connection of discharge tube D6, another termination capacitor C 19 of inductance 1L6, cross the end of electric socket CP6, the other end ground connection of capacitor C 19, another termination inductance L 22 of capacitor C 6, the end of capacitor C C32, the other end ground connection of inductance L 22, another termination inductance L 21 of capacitor C C32, the end of capacitor C C31, the end of another termination capacitor C C35 of inductance L 21, the other end ground connection of capacitor C C35, another termination inductance L 20 of capacitor C C31, the end of capacitor C C30, the end of another termination capacitor C C34 of inductance L 20, the other end ground connection of capacitor C C34, another termination inductance L 19 of capacitor C C30, the end of capacitor C C29, the end of another termination capacitor C C33 of inductance L 19, the other end ground connection of capacitor C C33, another termination inductance L 23 of capacitor C C29, one end of capacitor C 5, another edge joint OUT3 of capacitor C 5, the end of discharge tube D5, the end of inductance 1L5, the other end ground connection of discharge tube D5, another termination capacitor C 17 of inductance 1L5, cross the end of electric socket CP5, the other end ground connection of capacitor C 17, the end of optical receiver delivery outlet 4 jointing IN4, another termination capacitor C 8 of joint IN4, discharge tube D8, the end of inductance 1L8, the other end ground connection of discharge tube D8, another termination capacitor C 23 of inductance 1L8, cross the end of electric socket CP8, the other end ground connection of capacitor C 23, another termination inductance L 31 of capacitor C 8, the end of capacitor C C46, the other end ground connection of inductance L 31, another termination inductance L 30 of capacitor C C46, the end of capacitor C C45, the end of another termination capacitor C C49 of inductance L 30, the other end ground connection of capacitor C C49, another termination inductance L 29 of capacitor C C45, the end of capacitor C C44, the end of another termination capacitor C C48 of inductance L 29, the other end ground connection of capacitor C C48, another termination inductance L 28 of capacitor C C44, the end of capacitor C C43, the end of another termination capacitor C C47 of inductance L 28, the other end ground connection of capacitor C C47, another termination inductance L 32 of capacitor C C43, one end of capacitor C 7, another edge joint OUT4 of capacitor C 7, discharge tube D7, the end of inductance 1L7, the other end ground connection of discharge tube D7, another termination capacitor C 21 of inductance 1L7, cross the end of electric socket CP7, the other end ground connection of capacitor C 21, an end of the termination inductance L 9 of radio frequency seat J4, the end of another termination capacitor C C10 of inductance L 9, another termination inductance L 8 of capacitor C C10, the end of capacitor C C9, the end of another termination capacitor C C14 of inductance L 8, the other end ground connection of capacitor C C14, another termination inductance L 7 of capacitor C C9, the end of capacitor C C8, the end of another termination capacitor C C13 of inductance L 7, the other end ground connection of capacitor C C13, another termination inductance L 6 of capacitor C C8, the end of capacitor C C11, the other end of inductance L 5, the other end ground connection of capacitor C C11, the end of another termination capacitor C C12 of inductance L 6, the other end ground connection of capacitor C C12, one end of the termination inductance L 18 of radio frequency seat J5, the end of another termination capacitor C C24 of inductance L 18, another termination inductance L 17 of capacitor C C24, the end of capacitor C C23, the end of another termination capacitor C C28 of inductance L 17, the other end ground connection of capacitor C C28, another termination inductance L 16 of capacitor C C23, the end of capacitor C C22, the end of another termination capacitor C C27 of inductance L 16, the other end ground connection of capacitor C C27, another termination inductance L 15 of capacitor C C22, the end of capacitor C C25, the other end of inductance L 14, the other end ground connection of capacitor C C25, the end of another termination capacitor C C26 of inductance L 15, the other end ground connection of capacitor C C26, one end of the termination inductance L 27 of radio frequency seat J6, the end of another termination capacitor C C38 of inductance L 27, another termination inductance L 26 of capacitor C C38, the end of capacitor C C37, the end of another termination capacitor C C42 of inductance L 26, the other end ground connection of capacitor C C42, another termination inductance L 25 of capacitor C C37, the end of capacitor C C36, the end of another termination capacitor C C41 of inductance L 25, the other end ground connection of capacitor C C41, another termination inductance L 24 of capacitor C C36, the end of capacitor C C39, the other end of inductance L 23, the other end ground connection of capacitor C C39, the end of another termination capacitor C C40 of inductance L 24, the other end ground connection of capacitor C C40, one end of the termination inductance L 36 of radio frequency seat J7, the end of another termination capacitor C C52 of inductance L 36, another termination inductance L 35 of capacitor C C52, the end of capacitor C C51, the end of another termination capacitor C C56 of inductance L 35, the other end ground connection of capacitor C C56, another termination inductance L 34 of capacitor C C51, the end of capacitor C C50, the end of another termination capacitor C C55 of inductance L 34, the other end ground connection of capacitor C C55, another termination inductance L 33 of capacitor C C50, the end of capacitor C C53, the other end of inductance L 32, the other end ground connection of capacitor C C53, the end of another termination capacitor C C54 of inductance L 33, the other end ground connection of capacitor C C54, joint AC60V IN takes over the other end of electric socket CP1-CP8, discharge tube D9, capacitor C 10, C12, C14, C16, C18, C20, C22, C24, the end of C25-C29, discharge tube D9, capacitor C 10, C12, C14, C16, C18, C20, C22, C24, the other end ground connection of C25-C29, radio frequency seat J4, the other end of J5 is connected with two outputs of distribution branch plug-in unit FP/FZ2 respectively, radio frequency seat J6, the other end of J7 is connected with two outputs of distribution branch plug-in unit FP/FZ3 respectively, the end of the input termination radio frequency seat J2 of distribution branch plug-in unit FP/FZ2, the end of the input termination radio frequency seat J3 of distribution branch plug-in unit FP/FZ3, radio frequency seat J2, the other end of J3 is connected with two outputs of distribution branch plug-in unit FP/FZ1 respectively, the input of distribution branch plug-in unit FP/FZ1 is connected with the end of radio frequency seat J1, radio frequency line JP1-JP4 is connected with the output of EOC local side module 1-4 respectively, and radio frequency line JP1 connects the other end of radio frequency seat J1.