CN102983950A - High-speed grouped data transmission device and transmission method and comprehensive multimedia playing business providing method - Google Patents

High-speed grouped data transmission device and transmission method and comprehensive multimedia playing business providing method Download PDF

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CN102983950A
CN102983950A CN2011102631090A CN201110263109A CN102983950A CN 102983950 A CN102983950 A CN 102983950A CN 2011102631090 A CN2011102631090 A CN 2011102631090A CN 201110263109 A CN201110263109 A CN 201110263109A CN 102983950 A CN102983950 A CN 102983950A
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signal
frequency
channel
frequency band
band
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朱荣斗
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Bicom Corp
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Bicom Corp
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Abstract

The invention relates to a high-speed grouped data transmission device and a transmission method and a comprehensive multimedia playing business providing method. Through adoption of multiple-input and multiple-output technology, data flow signals are distributed to a plurality of communication channels which are different from each other, and are converted into 900 MHz frequency band signals and then transmitted. The best data flow signals are selected on a receiving side so as to improve the transmission speed, the transmission distance and signal quality. Moreover, multimedia playing through a plurality of external communication media such as the internet, telephones and community antenna televisions (CATV) can be provided in real time.

Description

High-speed packet data transmission apparatus and method in the hybrid network and comprehensive multi-media play service supplying method
Technical field
The present invention relates to utilize the technology of wired hybrid network (HYBRID FIBER COAXIALNETWORK:HFC) high speed transmitting grouped data signal of optical cable and coaxial cable, relate in particular to high-speed packet data transmission apparatus and method and comprehensive multi-media play service supplying method in hybrid network, specifically, to applicable multiple-input and multiple-output (the MULTI INPUT MULTI OUTPUT:MIMO) technology of traffic spike, thereby distribute to the different a plurality of channels of centre frequency, and transmit after being transformed into the signal of 900MHz frequency band, select the best data stream signal at receiver side, thereby improve transmission speed and transmission range and signal quality, and can provide in real time and pass through the Internet, phone, the multimedia of the multiple communication medium of the outside of CATV etc.
Background technology
In the modern society that develops rapidly, the method that can transmit swimmingly the information of dramatic growth has a variety of.
Wherein, for correct and various multimedia messagess such as transmitting image and literal promptly, as a link of advanced instructional item, in school, popularized demonstration with equipment such as television set, multimedia computer and document cameras.
Yet, in existing inner Play System, dividing equally is arranged is useful on cable that CATV plays, be used for speaker cables and the ultrahigh speed special circuit that is used for the Internet and telephone line etc. that guiding is play, and separately runs described inner Play System and the external communications media such as multimedia computer, telephone set and TV.
Therefore, not only can not the whole inner Play System of integrated management, thereby and the huge expense when arranging in the early stage and the expense that is used for keeping/safeguard each equipment and circuit etc. reduce its efficient.
And, along with the reorganization because of educational administration's tissue, be the main research department that separates so that teacher's working forms is broken up into to teach from unified educational administration chamber, for the transmission of the various information of runing school can not realize it being actual conditions by all senate meetings, therefore need a kind ofly to transmit media for Faculty and Students provide new information.
In addition, because voice signal is by the loud speaker transmission, therefore the other communicator transmission of signal of video signal by being connected by coaxial cable (coaxial cable) etc. separate distribution to loud speaker with special circuit and coaxial cable etc.Therefore, the difficulty when often line management occuring, namely the situations such as the opening circuit of circuit, short circuit bring great inconvenience for the operation of school and described building.
Thereby existing inner Play System is because of its setting and keep/reduction of administrative expenses and its efficient, thus do not play its due effect.
On the other hand, hybrid network is the wire net that optical cable (OPTICAL CABLE or OPTICAL FIBER) and coaxial cable (COAXIAL CABLE) mix, broadcasting station and optical terminus connect by optical cable between (perhaps optical communication net unit), be connected by coaxial cable between optical terminus and the user, thus at high speed transmission grouping (PACKET) data.
Along with the development of computer and Internet service correlation technique and extensively universal, in company, school and administrative office etc., use very at large the Internet, and in each family, use the Internet also to become very popular.
Server (SERVER) or computer and the network (NETWORK) that in whole world connect of the Internet by various information are provided is connected to each other, and the retrieval and be provided at the information from general general knowledge to professional technique on the every field, the form of information is to provide with the multimedia form that is comprised of any media format in literal, symbol, image, animation, the sound or a plurality of media.Can be divided into a plurality of groupings (PACKET) thereby the amount of each information factor data is more, and when transmission information, transmit continuously a plurality of grouped datas, with the mobile data flow (STREAM) that is called of the data of this continuous transmission.Grouping includes the data of unit-sized of certain specification, and records the size etc. of the transmission ground of information and destination, data, thereby in non real-time to a plurality of computer transmission of informations that are connected in the Internet.
Network connection as described the Internet is used coaxial cable usually with circuit.The Internet has following characteristic: its quantity with the computer that is connected simultaneously is more, and the amount of the data of transmission is more, and the length of transmission line is longer, and its transmission speed and signal quality reduce.
Particularly, because popularizing of computer and the Internet enlivened, information utilization by the Internet comes to life, along with the prosperity such as the application technology of Internet Protocol telephone (IP-PHONE), digital cable broadcast, IP-TV etc., to the transmission requirement of HRPD (high rate packet data) increase and as remote measurement, antitheft, take precautions against natural calamities, also regarded as output controlling of its demand in the low speed packet field of data transmission of home automation etc.Namely, utilize the transfer of data of the Internet to require or demand continuation increase, therefore need the more at high speed network of transferring large number of data of exploitation, and the formed network of transmission line of suitable this requirements of the times is exactly the hybrid network (HFC) of composite cable and coaxial cable.
The international technology standard that defines according to the standard criterion for the data by the transmission of described net, be Data Over Cable Service Interface Specifications (Data-over-Cable Service Interface Specifications:DOCSIS), the transmission of data under the bandwidth of in 5～860MHz frequency band, allowing by the transfer of data of hybrid network, and bandwidth is according to the difference of country and variant, the U.S. and Korea S have distributed 6MHz, and 8MHz has been distributed in Europe.It is qam mode that present data transfer by hybrid network utilizes quadrature amplitude modulation (Quadrature Amplitude Modulation) mode.
Described length by the hybrid network transmitting grouped data is limited, and has the poorer problem of the transmission longer signal quality of length.
Thereby, need to develop the technology that can be increased in the packet data transmission length in the hybrid network and improve signal quality.
Summary of the invention
The present invention proposes for solving described problem, the object of the present invention is to provide a kind of high-speed packet data transmission device and method in hybrid network, being about to a distribution of flows is a plurality of data flow, and be transferred to mutually different channel of centre frequency, thereby improve transmission speed and the transmission range of the grouped data of wired hybrid network.
And, another object of the present invention is to, a kind of high-speed packet data transmission device and method in hybrid network is provided, namely by utilizing multiple-input and multiple-output (MIMO) technology to the hybrid network transmitting grouped data, thus the problem of eliminating the error in data phenomenon that increases because of decline and the transmission quality of signal being reduced by the frequency diversity mode.
In addition, another purpose of the present invention is, a kind of comprehensive multi-media play service supplying method is provided, the signal that namely the various communication mediums from the outside is received carries out comprehensively, modulation and distribution, utilize described multimedia professional thereby provide in real time, and utilize single coaxial cable (coaxial cable) with a unlimited wiring line setting and be embodied as single wiring line, described unlimited wiring line is used for providing various play service and transmitting image and sound, multi-media signal etc., therefore reduce expense and minimizing when arranging to keep/expense when safeguarding etc., improve its efficient.
For reaching described purpose, high-speed packet data transmission device in hybrid network of the present invention, comprise: control part, its input and output multimedia data stream signal is also controlled the operation of each function part, process thereby carry out quadrature amplitude modulation, applicable IEEE 802.11 schemes are transformed to 2.4GHz frequency band high-frequency signal with the base-band data stream signal, a traffic spike is assigned as an above data flow, and above channel signal of selection mixes and monitors in an above channel signal; Base band part, it is connected in described control part, and in base band, traffic spike is carried out quadrature amplitude modulation, be useful in selected any one scheme among IEEE 802.11n and the IEEE 802.11g, and the forward error correction function of additional code and decoding, inspection error of transmission; Radio-frequency head, it is connected in described base band part, and traffic spike is modulated into the high-frequency signal of 2.4GHz frequency band, and the high-frequency signal of 2.4GHz frequency band is demodulated into the base-band data stream signal; Frequency conversion section, the high-frequency signal of the 2.4GHz frequency band that it will be introduced from described radio-frequency head is assigned as the high-frequency signal of identical more than one 900MHz frequency band, and selects any one and be transformed to the high-frequency signal of 2.4GHz frequency band and cause described radio-frequency head in the high-frequency signal of an above 900MHz frequency band; Filtering section, it is connected in described frequency conversion section, and cuts off and remove noise signal from the high-frequency signal of the 900MHz frequency band that can receive and dispatch; The matching part, it is connected in described filtering section, and the high-frequency signal of 900MHz frequency band is carried out input and output according to the impedance matching state; Hybrid network, it is connected in described matching part, and the high-frequency signal by coaxial cable and optical cable transmission 900MHz frequency band; PLL section, it is connected in described frequency conversion section, and exports more than one center frequency signal; PIC section, it is connected in described PLL section, and regulates the generation of the more than one centre frequency of described output by voltage control.
And, in order to reach the high-speed packet data transmission method in hybrid network of the present invention of described purpose, it comes the transmitting high speed grouped data with the device that comprises control part, base band part, radio-frequency head, frequency conversion section, filtering section, matching part, PLL section, PIC section, hybrid network, it is characterized in that, comprise: the first process, when the input of the multimedia data stream signal of the base band of confirming according to described control part to send, thereby the control base band part is carried out quadrature amplitude modulation, and applicable IEEE 802.11 schemes, additional code and forward error correction function; The second process receives the base-band data stream signal of described the first process and is modulated into the high-frequency signal of 2.4GHz frequency band, and is transformed to and is distributed into one with the high-frequency signal of the 900MHz frequency band of upper signal channel, to remove noise and matching status sends to hybrid network; The 3rd process, when having been confirmed to receive the high-frequency signal of 900MHz frequency band from hybrid network by described control part, input with matching status, and remove noise, will be in the traffic spike of the channel of received signal strength and transmitted error rate the best selected any one traffic spike with upper signal channel be transformed to the high-frequency signal of 2.4GHz frequency band; The 4th process, receive described the 3rd process the 2.4GHz frequency band high-frequency signal and be demodulated into baseband signal, and applicable quadrature amplitude demodulation and IEEE 802.11 schemes, decode and forward error correction process after output.
In addition, in order to reach described purpose, comprehensive multi-media play service supplying method of the present invention, it is characterized in that, comprise the steps: step a, when the multi-media signal that will receive from the outside provides system to send to a plurality of broadcast reception system by the comprehensive multi-media play service, connect described broadcast reception system and the comprehensive multi-media play service provides system by one-piece type single distribution; Step b after the play signal that receives from the outside is mated, is modulated into the RF signal with the signal of described coupling; Step c is transformed to image, sound and the caption signal consistent with the specific communications media in described broadcast reception system with the RF signal of described modulation; Steps d, for the signal with described conversion is transferred to described specific communications media, thus distributing signal; Step e, for so that the signal of described distribution is transferred to corresponding communication medium, select respective channel after, to the signal of the described conversion of described selected transmission; Step f, in the steps d of distributing described signal, when the position of described broadcast reception system changed to predetermined distance, program control section changed and controls the program according to described change of location; Step g, autodiagnosis inspection/control part check the line status of described single distribution and the communication medium state in described broadcast reception system termly.
The present invention has following industry and utilizes effect constituted as described, namely by the hybrid network that is made of optical cable and the coaxial cable packet data streams of transmission of large capacity at high speed, adds simultaneously longer transmission distance, thereby can be with low expense high speed transmission data stream.
And, the present invention utilizes multiple-input and multiple-output (MIMO) technology, by the frequency diversity mode in a hybrid network, identical data flow is transferred to respectively the channel of different mutually frequencies, and in the best data flow of receiver side selection, therefore reduce the phenomenon that in wired hybrid network, produces error in data, thereby improve the reliability to the transmission quality of signal, thereby have effect easy to use.
According to the present invention, not only can provide in real time the comprehensive multi-media play service to being arranged on the telephone set on a plurality of classrooms/educational administration's chamber/sports ground, general PC and audio frequency amplifier etc., and when described business is provided, coaxial cable at a low price is set to single distribution, therefore can reduce the expense of keeping, safeguarding, improve and construct the efficient of infrastructure, and can provide in real time.
Description of drawings
Fig. 1 is for being used for illustrating the functional block diagram of hybrid network according to an embodiment of the invention;
Fig. 2 is the detailed function composing schematic diagram of data sending device according to an embodiment of the invention;
Fig. 3 is the data transmission method precedence diagram of data sending device according to an embodiment of the invention;
Fig. 4 is the schematic diagram of the frequency band of increase channel according to an embodiment of the invention;
Fig. 5 is for amplifying the figure according to the frequency band of a channel in Fig. 4;
Fig. 6 is the schematic diagram of the detailed formation of the first modulation portion according to an embodiment of the invention;
Fig. 7 is the schematic diagram that the detailed functions of data sink according to an embodiment of the invention consists of;
Fig. 8 is the precedence diagram of the data output method of data sink according to an embodiment of the invention;
Fig. 9 is the function constitution map of the high-speed packet data transmission device in hybrid network according to an embodiment of the invention;
Figure 10 is for being transformed to the high-frequency signal of 2.4GHz frequency band according to the present invention a conceptual illustration figure that above channel signal transmits of 900MHz frequency band;
Figure 11 is the conceptual illustration figure that the signal that selection is best in the high-frequency signal of more than one 900MHz frequency band according to the present invention and the high-frequency signal that is transformed into the 2.4GHz frequency band transmit;
Figure 12 is the precedence diagram of the high-speed packet data transmission method in hybrid network according to an embodiment of the invention;
Figure 13 provides the summary pie graph of system for comprehensive multi-media play service according to the present invention;
Figure 14 provides the detailed pie graph of the first embodiment of system for comprehensive multi-media play service according to the present invention;
Figure 15 is at length representing the figure according to the embodiment of broadcast reception system of the present invention;
Figure 16 provides the flow chart of the running of system for representing successively comprehensive multi-media play service according to the present invention;
Figure 17 provides the detailed pie graph of the second embodiment of system for comprehensive multi-media play service according to the present invention;
Figure 18 provides the detailed pie graph of the 3rd embodiment of system for comprehensive multi-media play service according to the present invention;
Figure 19 provides the detailed pie graph of the 4th embodiment of system for comprehensive multi-media play service according to the present invention.
Description of reference numerals:
100: data sending device 200: optical cable
300: optical terminus 400: coaxial cable
500: data sink
1000,1000 ': terminal part 1100,1100 ': control part
1200,1200 ': base band part 1300,1300 ': radio-frequency head
1400,1400 ': frequency conversion section 1500,1500 ': filtering section
1600,1600 ': matching part 1700,1700 ': PLL section
1800,1800 ': PIC section 2000: hybrid network
3100: 3110: the first communication medium of broadcast control device
3200: the comprehensive multi-media play service provides system
3210:RF coupling/control part 3220: play service provides/control part
3230: power control part 3240: program control section
3250: channel control part 3260: the signal transformation component
3270: distribute control part 3280: the amplification control part
3290: autodiagnosis inspection/ control part 3300,3300n: broadcast reception system
3310,3310n: receiving control device 3320,3320n: second communication media
3400: coaxial cable (coaxial cable) 3500: optical cable (fiber optic cable)
3510: light sending part 3520,3520n: light receiver
3610: wireless signal transmission/control part 3620,3620n: reception of wireless signals section
Embodiment
The term that uses in this specification and claims or word should not limit and be interpreted as the meaning on common or the dictionary, the inventor is in order to illustrate the invention of oneself with the best way, from defining rightly the principle of the concept of term, should be interpreted as the meaning and the concept of technological thought according to the invention.
For the transmission speed of the grouped data that improves wired network and wireless network, utilized a lot of methods, in WLAN (wireless local area network), use multiple-input and multiple-output (the MULTI INPUT MULTI OUTPUT:MIMO) concept of array antenna to improve transmission speed.The basic conception of multiple-input and multiple-output (MIMO) is when transmitting wireless signals, by reflection repeatedly, the signal that copies as in the same manner a plurality of paths to be transferred to each path, thereby to be delivered to receiver side.In the system that uses an input and an output (SISO), once send and receive a data flow to a space, if but utilize the MIMO concept, then simultaneously can transmit a plurality of data flow.That is, MIMO is to the concept of a wire transmission circuit by the information of a plurality of channel inputs and output identical content.In general, transmission line bends to various forms according to environment is set, and along the signal of the circuit transmission bending Multi reflection because of transmission line, produces decline (FADING) thereby therefore generate a plurality of transmission paths in line-internal.Decline becomes very large problem in the transmission of digital signal, introduced diversity technique as eliminating fading problem, and diversity have living space diversity, frequency diversity, time diversity etc.In the situation of wire transmission circuit, if frequency is different, then can utilize a circuit to transmit simultaneously the signal of a plurality of channels.The transmission line of the present invention by being formed by hybrid network, a plurality of transmissions that the data flow centre frequency is different, therefore applicable frequency diversity technique, relate to particularly following technology, namely select the data flow of optimum channel at receiver side analysis received signal strength indicator (RSSI) and transmitted error rate (BER), thereby improve transmission speed, transmission range, transmission quality.
Fig. 1 is for being used for illustrating the functional block diagram of hybrid network according to an embodiment of the invention.
Below, 1 be elaborated with reference to the accompanying drawings.Hybrid network is the net that is made of optical cable 200 and coaxial cable 400, and with the broadband transmission network of a large amount of data to the subscriber household transmission.That is, the TV played data is delivered to the receiving system 500 that is connected in coaxial cable 400 from data sending device 100 via optical cable 200 and optical terminus 300.Data sending device 100 is to play or cable tv is play and device that conversion and the amplification backward optical cable 200 that is high-frequency signal sends for wired TV, and the data sending device (Headend) that is arranged on broadcast office is included in wherein.Orthogonal frequency division multiplexing (OFDM) mode of the subcarrier (carrier wave) of data sending device 100 by utilizing quadrature amplitude modulation (QAM) is modulated and is sent data.
Optical cable 200 is cables that the signal of telecommunication is converted to light signal and transmits by glass fibre.Light signal is at the inner counter interflection of optical cable and transmit losslessly, and it is wide that its bandwidth is compared with other wire transmission media, thereby data transmission efficiency is good.
Optical terminus 300 to data sink 500, and upwards receives signal from data sink 500 with the signal going down.Between optical terminus 300 and data sending device 100, be connected with optical cable 200, between optical terminus 300 and data sink 500, be connected with coaxial cable 400.
Coaxial cable 400 is formed with concentric circles at its external conductor and inner conductor, and transmits the high-frequency signal of hundreds of MHz in comprising the low frequency of direct current.
Data sink 500 is included in the TV receiving system that arranges in the subscriber household, and the data that receive are carried out demodulation process and passed through picture disply.Be in the situation of the IPTV that realized by bilateral system, to the required data of data sending device 100 direction reverse transfer when data sink 500.
On the other hand, according to embodiments of the invention, data sending device 100 comes the transmission of data from existing band spreading to the frequency field 870MHz～1.6GHz, describes data sending device 100 in the explanation of following Fig. 2 to Fig. 6 in detail.The transfer of data of the frequency field of for convenience of explanation, description thereof is omitted 5MHz～860MHz frequency band.
Fig. 2 is the schematic diagram of the detailed function composing of data sending device according to an embodiment of the invention.
Below, describing in detail with reference to accompanying drawing, data sending device 100 comprises input part 110, band spreading section 120, adaptive filter 125, serial parallel conversion section 130, modulation portion 140 and sending part 150.
Input part 110 is inputted wired TV broadcast, cable tv broadcast, various theme or program according to data mode.Band spreading section 120 is according to the DOCSIS specification, after the band spreading of the 5MHz～860MHz that will use in cable tv, to 870MHz～1.6GHz frequency band transmission.That is, band spreading section 120 utilizes the frequency resource of relative high frequency band and transmits the more data of volume, and eliminated and cable tv between frequency interferences, therefore the transmission of data stably.
The frequency expansion method of frequency has the method and the method that is suitable for commercial MoCA silicon (MoCA Silicon) that is suitable for based on RF spectrum stack (Spectrum Overlay) technology of PLL (Phase Locked Loop), but preferably is suitable for commercial MoCA silicon scheme among the present invention.
MoCA (Multimedia over Coaxial Alliance, multimedia over Coax Alliance) silicon is not connected between distribution and device, and utilization within the family in (in-home) coaxial cable untapped bandwidth transmit the new mode of sound, picture and data.That is, MoCA silicon mode provides following high-quality business (QoS): existing coaxial cable base construction is utilized as network system and transmits the more data of volume.
Adaptive filter (Adaptive Filter) 125 is distributed to a plurality of channels (among the present invention for distributing to 8 channels) with the band signal of the 870MHz～1.6GHz by filtering expansion.At this, adaptive filter 125 is maintained about 50MHz with the frequency bandwidth of each channel, and the frequency interval of interchannel is minimized.
In general, on the characteristic of QAM mode, the figure place of transmitting of data is to be decided by the waveform that is loaded with data (SYMBOL), and (BIT ERROR RATE) is lower for bit error rate, and the bit number that each symbol can transmit is more.Thereby if utilize adaptive filter 125, then signal to noise ratio (SIGNAL TO NOISE RATIO:SNR) is maintained more than 3.8, and can make the minimum interference of interchannel, can obtain lower bit error rate in the frequency of high frequency band.Adaptive filter 125 according to an embodiment of the invention can be made of active filter.Illustrated that in Fig. 2 adaptive filter 125 is connected in band spreading section 120, but also can be connected in modulation portion 140.
Serial parallel conversion section 130 is assigned as tandem data corresponding to 8 channels (data in parallel of CH1～CH8).As shown in Figure 2, the data by serial parallel conversion section 130 are delivered to the modulation portion corresponding with each channel, namely the first modulation portion 141, the second modulation portion 142 ..., the 7th modulation portion 147, the 8th modulation portion 148.
On the other hand, serial parallel conversion section 130 might produce the phenomenon of transmission delay tandem data being transformed in the process of data in parallel in particular channel because of the rapid variation of noise or gain etc.Thereby serial parallel conversion section 130 reduces the transmission band of particular channel by the channel switch algorithm, and increases the transmission band of other good channels of the characteristics such as noise or gain.Thus, can prevent the delay of transmission of particular channel and the loss of data, reduce the reduction of transmission quality.
Modulation portion 140 comprise 8 modulation portion (the first modulation portion 141, the second modulation portion 142 ..., the 7th modulation portion 147, the 8th modulation portion 148), 8 channels with expansion are corresponding respectively for it.
In the present invention, to the frequency band transmission data of 870MHz～1.6GHz the time, quadrature amplitude modulation (Quadrature Amplitude Modulation:QAM) mode and orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing:OFDM) modulation system are combined modulating from the data of cable tv transmission.
That is, data communication device is crossed the OFDM mode and is distributed to respectively 8 channels, and the subcarrier corresponding with each channel (carrier wave) signal is modulated rear transmission by the QAM mode.
The OFDM mode refers to the multiple modulation system that turns to the narrow-band carrier wave of a plurality of quadratures of data.In an embodiment of the present invention, the OFDM symbol for 870MHz～1.6GHz frequency band is made of employed subcarrier (sub-carrier) in the QAM modulation.Therefore, OFDM mode of the present invention is followed employed subcarrier in the QAM modulation in 870MHz～1.6GHz frequency band.Thus, in 870MHz～1.6GHz frequency band, the transmission speed of OFDM subcarrier (sub-carrier) is determined by the modulation portion 140 with QAM mode.
In addition, the QAM mode is that digital signal sorting is a certain size and amount, thus the method that changes carrier signal and phase place and modulate simultaneously.QAM is the form by the two-dimensional symensional symbol modulation of two PAM (phase amplitude modulation) signal in orthogonal combination.The data that will send are so that the level of posting a letter that can send shines upon respectively (mapping) to 4 four-quadrant signal spaces of the two dimension with a plurality of signals (Phasor) point namely troop (constellation).The signaling point of respectively trooping is commonly called " symbol ", and is defined as intrinsic unique binary code (unique binary code).QAM troops in order to embody respectively same-phase composition and orthogonal component, thereby uses " I " and " Q " composition, and at this, QAM data or symbolic representation are two I and Q composition.The QAM mode is different from QPSK (Quadrature Phase Shift Keying) mode, not only phase place is used as variable, also its size is also used as variable, therefore can the relatively more numerical data of while high-speed transfer.On the other hand, in 5MHz～860MHz frequency band, data are modulated with the QAM mode with in the past the same.
Sending part 150 comprise a plurality of sending parts (the first sending part 151, the second sending part 152 ..., the 7th sending part 157, the 8th sending part 158), its corresponding to 8 modulation portion (141,142 ..., 147,148).Sending part 150 is by hybrid network (HFC) the transmission data-signal corresponding with each frequency band.
Below, with reference to Fig. 3 to Fig. 5, thereby the method for expanding the transmission of data by 500 pairs of frequency bands of data sink in data sending device 100 is described.
Fig. 3 is the precedence diagram of the data transmission method of data sending device according to an embodiment of the invention.
Various themes or program are input as the form (S310) of sound or view data by the server of broadcast office.Band spreading section 120 is 870MHz～1.6GHz frequency band (S320) with frequency expansion for untapped frequency band in the DOCSIS specification.In addition, adaptive filter 125 will be given 8 channels (CH1～CH8) by the bandwidth assignment of filtering expansion.At this, the interference phenomenon between adaptive filter 125 minimum channel, and the interval between minimum channel.
Fig. 4 is the schematic diagram of the frequency band of increase channel according to an embodiment of the invention, and Fig. 5 is the schematic diagram that is amplified in the frequency band of a channel among Fig. 4.
With reference to Fig. 4, in the frequency band between 5MHz～860MHz, mainly transmit the wire communication signal as cable tv, in the frequency field more than 1.7GHz, transmission utilizes the wireless communication signals of PCS.According to embodiments of the invention, the bandwidth assignment between 870MHz～1.6GHz has 8 channels, and each channel has the bandwidth of 50MHz.Thereby, compare with the situation that increases a channel, have the effect of the transmission capacity that enlarges 8 times.
According to Fig. 5, a channel is take centre frequency (Fc) as benchmark, and its low-limit frequency is that Fc-28.5MHz and highest frequency are the frequency band of Fc+28.5MHz, and its frequency gain is about 40dB, bandwidth is about 50MHz, and the treating capacity of each channel (throughput) is more than the 120Mbps.
If the frequency band of this expansion is separated into 8 channels, then serial parallel conversion section 130 is transformed to tandem data and 8 channels (8 data in parallel (S340) that CH1～CH8) is corresponding.Data allocations in parallel is given each channel, and (S350) modulates in the data communication device ovennodulation section 140 of distribution.At this, data communication device is crossed with the OFDM mode of QAM modulated sub-carriers and is modulated, and sending part 150 is crossed hybrid network (HFC) to data sink 500 transmission (S360) with the data communication device of modulation.
Fig. 6 is the schematic diagram of the detailed formation of the first modulation portion according to an embodiment of the invention.
Below, describe the process of data being carried out the QAM modulation in detail with reference to accompanying drawing.Because all the other 7 modulation portion that comprise in modulation portion 140, namely the second modulation portion 142 ..., the formation of the 7th modulation portion 147, the 8th modulation portion 148 is identical, so only the first modulation portion 141 is described.
The first modulation portion 141 comprises transducer 170, the first level generator 171, second electrical level generator 172, delay element 173, carrier wave generating unit 174, phase transition section 175, the first frequency mixer 176, the second frequency mixer 177 and adder 178.
Transducer 170 will be transformed to from the binary data of serial parallel conversion section 130 input binary system data in parallel, and data are separated into respectively real part (Real) side data is that I channel (In-phase) data and imaginary part (Imaginary) side data are Q channel (Quadrature-phase) data.
The first level generator 171 and the second electricity swing device 172 produced and regulated the signal that is separated into respectively I, Q channel data in transducer 170 level.
Delay element 173 is in order to modulate simultaneously I channel signal and Q channel signal through the first level generator 171 and second electrical level generator 172, thereby the Q channel signal is postponed.
Carrier wave generating unit 174 is mixed carrier in the I channel signal, 90 ° of the Phase shifts of the carrier wave that phase transition section 175 will generate in carrier wave generating unit 174.
176 pairs in the first frequency mixer mixes from the signal of the first level generator 171 outputs and the carrier wave that generates from carrier wave generating unit 174.177 pairs in the second frequency mixer mixes from the Q channel signal of delay element 173 outputs with at the carrier wave of 90 ° of phase places of phase transition section 175 migrations.
178 pairs of I channel signal and Q channel signals from the first frequency mixer 176 and 177 outputs of the second frequency mixer of adder calculate.
Below, the action of the first modulation portion 141 constituted as described is elaborated.
When being inputted by 0 or 1 binary data that forms, transducer 170 is transformed to binary data the data in parallel of NRZ (Non Return to Zero) form.In addition, data in parallel are divided into I channel and Q channel, and simultaneously I channel signal and Q channel signal are modulated by delay element 173.Delay element 173 is in order to modulate simultaneously I channel signal and Q channel signal with phase difference, thereby the Q channel signal is postponed.In addition, mixed carrier in the I channel signal, and so that mix with the Q channel signal behind 90 ° of the Phase shifts of carrier wave.And, calculating by 178 pairs of I channel signals of adder and Q channel signal, I channel signal and Q channel signal are mutually orthogonal, also can not disturb even therefore synthesize by adder 178.
Fig. 7 is the schematic diagram of the detailed function composing of data sink according to an embodiment of the invention, and Fig. 8 is the precedence diagram of the output intent of data sink according to an embodiment of the invention.
Below, with reference to Fig. 7 and Fig. 8, data receiving system 500 is elaborated.Data sink 500 comprises Department of Communication Force 510, demodulation section 520, serial parallel conversion section 530 and efferent 540.Department of Communication Force 510 comprise 8 acceptance divisions being consisted of by parallel form (the first acceptance division 511, the second acceptance division 512 ..., the 7th acceptance division 517, the 8th acceptance division 518).Each acceptance division receives from the data (S810) of data sending device 100 via hybrid network (HFC) transmission.
Demodulation section 520 comprise 8 demodulation sections (the first demodulation section 521, the second demodulation section 522 ..., the 7th demodulation section 527, the 8th demodulation section 528), it corresponds respectively to 8 channels of expansion.Each demodulation section carries out demodulation (S820) to the data that receive from acceptance division 510.Demodulation mode is in modulation system illustrated in fig. 6, data separating is become I channel data and Q channel data, thereby phase place and amplitude are regulated.
Serial parallel conversion section 530 will (data in parallel of CH1～CH8) corresponding merge, thereby are transformed to tandem data (S830) with 8 channels.Efferent 540 outputs to (S840) on the picture with the analogue data of series connection.
In the present invention, to will in cable tv, expanding by employed 5MHz～860MHz frequency band, thereby in 870MHz～1.6GHz frequency band the transmission of data, therefore have and effectively utilize frequency band and transmit the more advantage of the data of volume.
Fig. 9 is the function constitution map of the high-speed packet data transmission device in hybrid network according to an embodiment of the invention.
Below, describe in detail with reference to Fig. 9, be comprise first terminal section 1000 and hybrid network 2000 and the second terminal part 1000 ' formation.
First terminal section 1000 and the second terminal part 1000 ' have identical formation and function, selected any can be used as head end (HEAD-END), another is used as user terminal (USER-END), thereby mutually receive and dispatch or signal transmission, therefore below for fear of repeat specification, describe as main take first terminal section 1000.
First terminal section 1000 comprises: control part 1100, base band part 1200, radio-frequency head 1300, frequency conversion section 1400, filtering section 1500, matching part 1600, PLL section 1700, PIC section 1800 and hybrid network 2000.
1100 pairs of whole operations of control part (CPU) are controlled and are monitored, and input and output multimedia data stream signal, be connected in base band part 1200, radio-frequency head 1300, frequency conversion section 1400, filtering section 1500, matching part 1600, PLL section 1700, PIC section 1800.And, control and monitor according to the mac operation system, so that base band (BASE BAND:BB) signal is carried out quadrature amplitude modulation (QUADRATURE AMPLITUDE MODULATION:QAM) to be processed, applicable IEEE802.11 scheme, conversion and releasing conversion (inverse transformation) are the high-frequency signal of 2.4GHz frequency band, send after being assigned as a 2.4GHz frequency band traffic spike more than one, in received more than one signal, select optimum signal to transmit.
The quadrature amplitude modulation mode is come carrying signal with the amplitude (AMPLITUDE) of carrier wave (CARRIER) with the mutual conversion of phase place (PHASE), and the digital modulation mode that amplitude-shift keying (AMPLITUDE SHIFT KEYING:ASK) modulation system and phase shift keying (PHASE SHIFT KEYING:PSK) modulation system are mixed, it does not need to represent indication (PILOT) signal of the timing (TIMING) of data, and can carry out high-speed transfer in the transmission band that limits.
Base band part (MAC/BB) 1200 is processed the system (OS) that the data-signal of receiving and dispatching moves according to the MAC mode in base band (BASE BAND:BB), control ﹠ monitor by control part 1100, be useful in the scheme that is suitable for according to selected any scheme or releasing (recovery) in the scheme of the IEEE802.11n that WLAN (wireless local area network) (WIRELESS LAN) specification is defined and IEEE802.11g agreement, and by encoding (CODING) and decode (DECODING) so that the third party can't eavesdrop for the selected mode of safety, and be attached with forward error correction (the FORWARD ERROR CORRECTION:FEC) function that checks error of transmission.
The technology of forward error correction (FEC): additional redundancy information (REDUNDANCY) on the grouped data of transmitter side transmission thus transmit, therefore find when wrong at receiver side, detect mistake and correct according to redundant information.
Radio-frequency head (RF) 1300 is modulated into base band (BB) signal the high-frequency signal of 2.4GHz frequency band and introduces frequency conversion section 1400, described base band (BB) signal is from the IEEE802.11 series scheme of base band part 1200 applicable WLAN (wireless local area network) specifications, and the high-frequency signal of described 2.4GHz frequency band is distributed to the radio band of WLAN (wireless local area network).And, the high-frequency signal of 2.4GHz frequency band is demodulated into base band (BB) signal, the high-frequency signal of described 2.4GHz frequency band receives by the WLAN (wireless local area network) specification from frequency conversion section 1400.That is, radio-frequency head 1300 is bi-directional configuration that transmitting-receiving (TRX) function part is integrated.
Frequency conversion section 1400 with the high-frequency data of 2.4GHz frequency band stream signal press identical content conversion (CONVERT) for based on one with the high-frequency signal of the 900MHz frequency band of upper signal channel and introduce filtering section 1500, the high-frequency data stream signal of described 2.4GHz frequency band according to the control of control part 1100 from radio-frequency head 1300 introducings.Simultaneously, the high-frequency signal of introducing more than one 900MHz frequency band from filtering section 1500 via each channel, select more than any one, and introduce radio-frequency head 1300 after being transformed to the high-frequency signal of 2.4GHz frequency band.
At this moment, when a traffic spike is assigned as more than one a plurality of traffic spike, identical and centre frequency (Fc) difference of the level that is distributed into the content of data and signal.That is, the data flow of identical content is transmitted by different frequencies.The centre frequency of frequency conversion section 1400 is adjusted according to the centre frequency (Fc) of introducing from PLL section 1700 or the signal of intermediate frequency (INTERMEDIATE FREQUENCY:IF), and PLL section 1700 is by centre frequency or the intermediate frequency of control generation and the output appointment of PIC section 1800.
And, frequency conversion section 1400 analyzes from filtering section 1500 and introduces more than one a plurality of data flow, thereby selects best one in or the data that transmitted error rate (BIT ERROR RATE:BER) is minimum the strongest at received signal strength indicator (RSSI).On the other hand, the selective reception signal strength signal intensity is synthesized or combination after indicating the data that (RSSI) is the strongest and transmitted error rate (BER) is minimum respectively, thereby improves the level of signal to noise ratio (SIGNAL TO NOISE RATIO:S/N) and amplification digital signal.
Traffic spike synthetic has following mode, thereby the signal of the channel that is: the channel that received signal strength indicator is the strongest and transmitted error rate are minimum synthesizes and is chosen as a channel, the mode that perhaps can also have the signal of the channel of the channel that received signal strength indicator is the strongest and the last the second to mix, and the signal of the minimum channel of transmitted error rate and the next to the lowest channel mode of mixing etc.In addition, also can select various application modes.That is the mode of, selecting according to the control ﹠ monitor of control part is selected best data flow.
Possess more than one a plurality of frequency conversion section 1400 with same formation, and according to centre frequency or the intermediate frequency signal introduced by PLL section 1700, so that the channel frequency of 900MHz is different.3 frequency conversion sections 1400 of expression in the accompanying drawing 9, but also can have manyly or still less, and consider that the expense of device and size etc. possess optimal number, preferably possess 2 channels in the present invention.
At this moment, each frequency conversion section 1400 becomes a channel, and to 40MHz frequency band transmission traffic spike.And each frequency conversion section 1400 is separated into respectively the channel spacing of 20MHz by the control ﹠ monitor of control part 1100.That is, on calculating, when channel was adjacent with channel, 60MHz need to be separated or separate to the intermediate frequency of each channel.Reason with aforesaid channel spacing is, prevents from occuring in the signal of each channel circuit mixing or signal mixing and interference.
As mentioned above, by possessing a plurality of frequency conversion section 1400, can utilize frequency diversity (FREQUENCYDIVERSITY) technology.Namely, in the present invention, by applicable frequency diversity technique in hybrid network, therefore can prevent decline (FADING), and can optionally utilize the signal of the channel of the channel of best received signal strength indicator (RSSI) and transmitted error rate (BER).
Figure 10 is transformed to a conceptual illustration figure that above channel signal transmits of 900MHz frequency band for the high-frequency signal with the 2.4GHz frequency band according to the present invention.
Below, explain with reference to accompanying drawing.Be described as follows state by conceptual mode: it is that 3 channel signals of the 900MHz frequency band of f0, f1, f2 transmit simultaneously that the traffic spike of 2.4GHz frequency band is transformed to centre frequency.At this moment, centre frequency is 3 data-signals that channel is identical content of the 900MHz frequency band of f0, f1, f2, and just frequency is different.That is, therefore the signal of different channels can transmit by a transmission path simultaneously so that frequency is different mutually.The signal of each channel exists according to the difference on the transmission characteristic of frequency, therefore, environmental condition according to the hybrid network 2000 that is utilized as transmission path, be delivered to receiver side by mutual different received signal strength indicator and transmitted error rate, select to improve the transmission characteristic of transmission range and signal in the situation of the signal of optimum channel or mixing adapting to frequency diversity technique.
On the other hand, frequency conversion section 1400 in accompanying drawing 9 selects the benchmark of any optimum channel to be in a plurality of channels that the control by control part 1100 receives, selective reception signal strength signal intensity indication (RECEIVE SIGNALSTRENGTH INDICATOR:RSSI) the strongest 900MHz channel, perhaps select the minimum 900MHz channel of transmitted error rate (BITERROR RATE:BER), synthetic or the mixing of the signal of the channel that perhaps signal of the channel that received signal strength is the strongest and transmitted error rate are minimum, thus be chosen as a channel signal.On the other hand, the method for mixing has following method, the mode that the signal of the channel that soon received signal strength indicator is the strongest and the channel of the last the second mixes; And the signal of the minimum channel of transmitted error rate and the next to the lowest channel mode of mixing, also can select various application modes in addition.As the one example, in the explanation of accompanying drawing 11, be elaborated.
Figure 11 is the conceptual illustration figure that the signal that selection is best in the high-frequency signal of more than one 900MHz frequency band according to the present invention and the high-frequency signal that is transformed into the 2.4GHz frequency band transmit.
Below, be elaborated with reference to accompanying drawing.As f0, f1, f2, in the high-frequency signal of the different more than one 900MHz frequency band of centre frequency, relatively received signal strength indicator and transmitted error rate, thus select the data flow of optimum channel and transmit.That is, sending and be received as in the situation of 2 centre frequencies at the traffic spike with identical content, can be described as 2*2 multiple-input and multiple-output (MIMO), is in the situation of 3 centre frequencies in transmitting-receiving, can be described as the 3*3 multiple-input and multiple-output.
On the other hand, filtering section 1500 in accompanying drawing 9 cuts off and removes the low or high frequency signal beyond the high-frequency signal of 900MHz frequency band, the noise signal that therefore can remove harmonic wave (HARMONIC) composition and introduce from the outside in the traffic spike to each channel in transmitting-receiving or transmitted in both directions.
Matching part 1600 is inputted the high-frequency data stream signal of each channel of 900MHz frequency band or is output as impedance matching (MATCHING) state, thereby transmits by the optimum condition that is suitable for hybrid network 2000.Described each function part is two-way.
PLL section 1700 is phase-locked loop (PHASELOCKED LOOP:PLL), and the frequency of exporting by voltage control adjustment, frequency conversion section 1400 is as an example, output center frequency (Fc) or intermediate frequency (IF) are in order to move according to the centre frequency of each channel of f0, f1, f2.
PIC section 1800 carries out voltage control (VOLTAGECONTROL) by the control ﹠ monitor of control part 1100 to PLL section 1700, therefore regulates or adjust centre frequency or the intermediate frequency of PLL section 1700 outputs.At this moment, PIC section 1800 is controlled the control ﹠ monitor of section 1100.On the other hand, PIC is the abbreviation of PLL CONTROL IC, is a kind of microcontroller (MICOM).
Hybrid network 2000 is networks (NETWORK) that optical cable (OPTICAL CABLE) and coaxial cable (COAXIAL CABLE) are mixed, optical cable can carry out the long Distance Transmission of high speed with the high frequency of GHz frequency band and the data of broad frequency band, but in the coaxial cable interval, be subject to the impact of frequency band, speed and distance that coaxial cable can transmit.
Usually, all-network (NETWORK) uses a plurality of bifurcated devices (SPLITER) for distribution (DISTRIBUTE), because larger decay (ATTENUATION) or loss (LOSS) occur in these bifurcated devices, the frequency that simultaneously decline (FADING) and restriction are transmitted.
In hybrid network 2000, also because of these bifurcated devices, be not suitable for transmitting the high-frequency signal of 2.4GHz frequency band, and the high-frequency signal of transmission 900MHz frequency band.
And, in order to reduce the decline that occurs in the hybrid network, thus applicable according to frequency diversity of the present invention (FREQUENCY DIVERSITY) technology.
Figure 12 is the precedence diagram of the high-speed packet data transmission method in hybrid network according to an embodiment of the invention.
Below, be elaborated with reference to accompanying drawing.When control part 1100 is confirmed the input of base band (BB) data-signal that will send (S2000), the base-band data signal of inputting is modulated by quadrature amplitude modulation (QAM) mode, and to be useful in by base band part 1200 be selected any scheme in the scheme of IEEE802.11n or IEEE802.11g agreement based on WLAN (wireless local area network) world standard technology, mode is in accordance with the instructions encoded in case be ravesdropping, and carry out control ﹠ monitor, so that the CRC function (S2100) that the mistake of additional treatments check digit signal occurs.
And, the digit data stream signal that control part will be finished Base-Band Processing by radio-frequency head 1300 is modulated into 2.4GHz frequency band high-frequency signal (S2200), described 2.4GHz frequency band high-frequency signal (S2200) is the frequency of distributing to WLAN (wireless local area network), and 2.4GHz frequency band high-frequency signal is assigned as more than one, at this moment, the data content that distributes is identical, and to be transformed to bandwidth by frequency conversion section 1400 be that 40MHz and channel spacing are the 900MHz frequency band high-frequency signal (S2300) of 20MHz.Being transformed to the 900MHz band signal is in order to transmit by hybrid network 2000.
As mentioned above, be transformed to the traffic spike of more than one a plurality of 900MHz frequency band high-frequency signals, remove noise signal (NOISE SIGNAL) by filtering section 1500, described noise signal (NOISE SIGNAL) comprises unnecessary frequency and high frequency, and by sending to hybrid network after 1600 couplings (MATCHING) of matching part, so that (S2400) normally transmitted in the loss according to minimum in hybrid network 2000.
And, when control part 1100 has confirmed to receive the high-frequency signal of 900MHz frequency band from hybrid network by the supervision of each function part (S2500), receive and be input as matching status by matching part 1600, and to remove unnecessary signal by filtering section 1500 be noise (S2600).
On the other hand, frequency conversion section 1400 is controlled and monitors, to being analyzed by a signal with each channel of upper signal channel reception and input, and will be by received signal strength indicator (RSSI) the strongest or minimum selected any one channel signal of error rate (BER) or selected any one above channel signal mix, thereby improve signal to noise ratio (S/N), and the digit data stream signal that will improve level is transformed to the high-frequency signal (S2700) of 2.4GHz frequency band.
In addition, the high-frequency signal of 2.4GHz frequency band is carried out demodulation process, namely be transformed to the baseband signal (S2800) that is easy to carry out Digital Signal Processing by radio-frequency head 1300.
The signal that is transformed to base band is understood i.e. decoding by 1200 pairs of codings of base band part, and the error that detects and correct transmission is that forward error correction is processed, applicable protocol of wireless local area network is IEEE 802.11 schemes simultaneously, and modulate (S2900) by control part by the quadrature amplitude modulation mode, and the digital data signal after the output modulation is in order to used (S3000).
When the high-frequency signal of transmission 2.4GHz frequency band in hybrid network 2000, can transmit theoretically-namely 100 meters of 10dBm, but in fact transmit about about 30～40 meters according to experiment.Its reason is to comprise that frequency characteristic and the 1GHz of each parts of bifurcated device (SPLITTER) matches.
According to formation of the present invention, confirm by experiment following true: when applicable IEEE 802.11g scheme, be under the state that the signal of same intensity do not make a mistake, the distance of transmitting in hybrid network can be improved to about about 500 meters based on-50dBm, when applicable IEEE 802.11n scheme, be improved to and transmit-about about 650 meters of 65dBm.At this, be in the situation of 5C cable as 1dBm, the distance that can transmit is about 10 meters.
Usually, the calculating formula according to the loss of frequency computation part on transmission path is as follows.
[calculating formula]
Path loss (PATH LOSS)=20log ((4*phi*d)/lamda)
That is, the frequency of signal is higher, and wavelength (lamda) shortens, and therefore increases loss (LOSS), thereby the distance of the transmission on transmission path shortens.
Thus, utilize frequency diversity technique, thereby the channel signal that same signal is transformed to a plurality of frequencies of different reference frequencies is transmitted simultaneously.Analyze the signal of each channel at receiver side, thereby selective reception signal strength signal intensity indication (RSSI) is the strongest or the signal of the channel that transmitted error rate (BER) is minimum, therefore improves transmission range and transmission speed and decline.And, with 2 channel signals of the best in conjunction with and improve signal to noise ratio (S/N) characteristic.
Figure 13 provides the concise and to the point pie graph of system for comprehensive multi-media play service according to the present invention.
With reference to Figure 13, comprehensive multi-media play service according to the present invention provides system 200, be interconnected in the broadcast control device 3100 of transmitter side and broadcast reception system 3300, the 3300n of receiver side, broadcast control device 3100 is connected in outside various the first communication mediums 3100, and broadcast reception system 3300,3300n comprise a plurality of receiving control devices 3310,3310n and second communication media 3320,3320n.At this moment, first and second communication media 3110,3320 comprise a plurality of CATV section 3111, CATV section 3321, video section 3112, video section 3322, audio portion 3113, audio portion 3323, PC section 3114, PC section 3324 and phone section 3115, phone section 3325.At this moment, according to the main body of affiliated signal transmission, described transmitter side and receiver side are convertible.
And, the comprehensive multi-media play service that as above consists of provides system 3200 when providing required business in real time, utilization in building/classroom/sports ground etc. merges into the coaxial cable (coaxial cable) 3400 that uniline forms, therefore, raise the efficiency as follows: be reduced in and keep/expense when safeguarding and various supplementary services are provided and reduce expense when in the early stage equipment being set etc.
Namely, comprehensive multi-media play service according to the present invention provides system 3200, after the multi-media signal modulation and being mixed into RF (Radio Frequency) signal, described multi-media signal comprises a plurality of images, sound and the caption information etc. that receive from broadcast control device 3100, the signal that mixes is carried out again conversion/distribution, thereby the coaxial cable 3400 by single communications line sends to each broadcast reception system 3300,3300n, therefore provides in real time according to comprehensive multi-media play service of the present invention.
Below, provide system to the comprehensive multi-media play service of structure as mentioned above, be elaborated with reference to accompanying drawing 13 and Figure 14.
Figure 14 provides the detailed pie graph of the first embodiment of system for comprehensive multi-media play service according to the present invention.
With reference to Figure 14, the comprehensive multi-media play service provide system 3200 comprise RF coupling/control part 3210, play service provide/control part 3220, power control part 3230, program control section 3240, channel control part 3250, signal transformation component 3260, distribute control part 3270, amplification control part 3280 and autodiagnosis inspection/control part 3290.
RF coupling/control part 3210 with multi-media signal be matched to a broadcast with signal after, the single signal of coupling is modulated into broadcast RF (Radio Frequency) signal, and described multi-media signal comprises from a plurality of picture signals, voice signal and the caption signal of broadcast control device 3100 inputs.
Play service provides/and control part 3220 utilizes coaxial cable 3400 to provide towards broadcast reception system (3300, real-time play service 3300n) (sound/image/caption information is provided), and the additional play service of bringing thus is provided, such as the guiding broadcasting (informing the sound that begins on class and finishes) of playing in the given time, for the music of student's mood mastery, by different multimedia business such as grade/class/buildings.
Power control part 3230 comprises that particularly the broadcast associate device of CATV section 3321,3321n is supplied with and the control power supply, and carries out consequent integral control function to a plurality of second communication media 3320,3320n.
Program control section 3240 will (for example change because of the position of broadcast reception system 3300,3300n, the new term, classroom location was to other building changes etc.) change of the receiving system brought, by programing change and control, prevent the distribution change that transmits to the business of described communication medium etc.That is, can prevent from building again because changing the loud speaker distribution that brings in the classroom the new term.
3250 selections of channel control part and control are to the channel of each broadcast reception system 3300,3300n and each communication medium.For example, when being arranged at CATV in the specific classroom and applying image and sound/caption signal, select and whole control provide to described ad-hoc location under professional channel.
Signal transformation component 3260 will mate from RF/and the broadcast of control part 3210 outputs is transformed to the signal that mates with affiliated media a plurality of second communication media 3320, the 3320n line output of going forward side by side with the RF signal.That is, described broadcast is transformed to image, sound and the caption signal line output of going forward side by side with the RF signal, the signal that perhaps will be transformed to from the multi-media signal that affiliated broadcast reception system the receives regulation line output of going forward side by side.
Distribute control part 3270 to distribute, so that the broadcast reception system of belonging positions multimedia signal receiving correctly, described multi-media signal comprises from image, sound and the caption signal of 3260 outputs of signal transformation component, and carry out and distribute and control, so that send the specific communications media of transmitter side to from the specific multi-media signal of described broadcast reception system reception.
Amplification control part 3280 for fear of because of and affiliated broadcast reception system between the distortion of the multimedia business brought of the minimizing of the signal magnitude that causes of long distance when providing, thereby be prescribed level with described broadcast with RF signal amplification or will be that prescribed level is exported from the multi-media signal amplification of affiliated broadcast reception system reception.
Autodiagnosis inspection/control part 3290 detects communication medium and the equipment with the line status of interconnective single coaxial cable 3400 between broadcast reception system 3300,3300n and a plurality of communication medium 3320, the 3320n and transmitting-receiving side, and carries out following function: the fault that therefore produces has or not the autodiagnosis of detection etc. and therefore required control function.
At this, by Figure 13 to Figure 15, can understand by building or a plurality of broadcast reception systems 3300, the 3300n that arrange by the classroom.
Figure 15 is at length representing the figure according to the embodiment of broadcast reception system of the present invention.
With reference to Figure 15, broadcast reception system 3300 comprises a plurality of receiving control devices 3310,3310n and second communication media 3320,3320n, and second communication media 3320,3320n comprise: the CATV section 3321, the 3321n that comprise a plurality of regular phones etc.; The video section 3322, the 3322n that comprise VTR etc.; Comprise audio frequency amplifier and loud speaker; The audio portion 3323, the 3323n that comprise microphone etc.; The PC section 3324, the 3324n that comprise general computer; And, comprise phone section 3325, the 3325n of regular phone machine.
Receiving control device 3310,3310n are carried out the various functions that distributes and bring thus, so that the broadcast that the prescribed level that system 200 receives is provided from the comprehensive multi-media play service correctly is delivered to affiliated communication medium 3320, the 3320n that is separately positioned on affiliated building/classroom/educational administration's chamber/sports ground etc. with the RF signal.
Namely, when the signal that receives from transmitter side is when comprising the multi-media signal of sound and image etc., the receiving control device of belonging positions will correctly transmit via cable modem 3326 and gateway 3327 by the multi-media signal of internet communication net transmission, so that described signal correctly is transferred to a plurality of general PC that is arranged on affiliated place (classroom) in real time, and to be transferred to general TV3321 ' and loud speaker 3323 ' signal control and carry out the holistic management that brings thus.At this moment, the voice signal to loud speaker 3323 ' transmission transmits via the audio frequency amplifier of stipulating.
And, will be from affiliated communication medium, for example, the multi-media signal that is arranged on image, sound and the captions etc. of the computer reception in the classroom is transferred to the comprehensive multi-media play service provides system 3200, thereby the image course of one class of execution also can be carried out in real time at three grades one class in the first year.
The comprehensive multi-media play service provides the course of work of system as follows constituted as described.
Figure 16 provides the flow chart of the course of work of system for representing successively comprehensive multi-media play service according to the present invention.
With reference to Figure 16, after being arranged at specific communications media 3110 reception image, sound and the caption signals of playing the chamber, when receiving this signal from the broadcast control device 3100 that affiliated signal is controlled and managed (S401), comprehensive multi-media play service according to the present invention is modulated into broadcast RF signal (S402) with the signal that mates after providing system 3200 that the multi-media signal that receives is matched to single play signal.
Then, carry out the control function of distributing and bringing thus, so that modulated broadcast can correctly be transferred to the specific communications media (S403) of receiver side with the RF signal.At this moment, when distant with the specific communications media of receiver side, for the minimizing of the signal magnitude that prevents from bringing thus and error of play service etc., thereby determine that described broadcast is with have or not (S404) of the big or small amplification of RF signal.
Afterwards, comprehensive multi-media play service amplification control part 3280 that system 3200 is provided is prescribed level go forward side by side line output (S405) with affiliated broadcast with RF signal amplification according to the result who determines.
Afterwards, play service provides/control part 3220 with the broadcast after the amplification with the RF signal and therewith relevant information correctly be transferred to the affiliated communication medium of receiver side, therefore provide in real time according to comprehensive multi-media play service of the present invention (S406).
Afterwards, broadcast that receiving control device 3310 in broadcast reception system 3300,3300n, 3310n will receive, and will again send to the comprehensive multi-media play service from image, sound and the caption signal etc. that affiliated communication medium receives system 3200 will be provided to specific communications media delivery and distribution (S407) with the RF signal.
The comprehensive multi-media play service is transferred to specific broadcast chamber after providing system 3200 again to mate from the signal that described broadcast reception system 3300,3300n receive and to modulate, therefore not only can provide in real time according to business of the present invention (S406), also can realize two-way communication.
On the other hand, autodiagnosis inspection/control part 3290 is not only to receiving and dispatching the various broadcast relevant devices of side, also to coaxial cable 3400 of broadcast reception system 3300, the interconnective single distribution of 3300n etc. is carried out receiving check (S409), thereby when confirming the fault of bringing thus, carry out the A/S work (S411) such as the position that item produces under confirming and the control that brings thus, repairing.Therefore, can reduce a lot of times and expense etc.
And, play service provides/when control part 3220 comprises the service request of playing from the reservation guiding of playing the chamber in reception, the signal that will receive from affiliated broadcast chamber provides to affiliated communication medium at special time in real time with after relevant therewith signal is stored in required time.
Afterwards, the comprehensive multi-media play service provide system 3200 be confirmed whether from the transmitting-receiving side with play relevant equipment append service request (S412), if confirm that the result does not append service request, the business (S413) that provides in real time to affiliated communication medium then is provided, on the other hand, if confirm that the result appends service request, then repeatedly carry out described process (step that S402 is later).
As mentioned above, comprehensive multi-media play service according to an embodiment of the invention provides system, not only can be provided in real time by the general PC that is arranged on educational administration chamber and other inside, classroom the morning exercises situation on the sports ground, and when described business is provided, utilize the coaxial cable of single wiring line to transmit, thereby reduce because using and keeping and the expense that causes and raising equipment, the efficient when constructing such as safeguard.
Below, understand according to other embodiments of the invention with reference to accompanying drawing.
Figure 17 provides the detailed pie graph of the second embodiment of system for comprehensive multi-media play service according to the present invention.
With reference to Figure 17, comprehensive multi-media play service according to a second embodiment of the present invention provides system 3200 to comprise light sending part 3510, and it is processed the multi-media signal that receives from the outside (signal relevant with phone/the Internet/digital broadcast etc.); A plurality of broadcast reception systems 3300,3300n also comprise light receiver 3520,3520n, and it presses the communication medium setting.
And, the comprehensive multi-media play service provides the optical cable of system 3200 by single wiring line (fiber optical cable) 3500 and a plurality of broadcast reception systems 3300,3300n to interconnect, and the communication medium 3320 in described broadcast reception system 3300,3300n, 3320n also interconnect by the optical cable 3500 by light receiver 3520,3520n and the single wiring line of each communication medium setting.
As mentioned above, the optical cable 3500 that comprehensive multi-media play service according to a second embodiment of the present invention provides system to utilize single wiring line, affiliated play service is offered a plurality of communication mediums (phone/the Internet/related medias such as digital broadcast) in real time, therefore the noise that does not only almost cause because of electric wave can also prevent the variation of the signal in transmission and the ultrahigh speed numerical data of transmission of large capacity.
Namely, the light sending part 3510 by the reception signal setting for the treatment of each multi-media signal that receives from the outside, to the signal relevant with phone, the Internet, digital broadcast etc. that receives from the outside mate, conversion, and be optical cable 3500 outputs to single wiring line.Afterwards, will be transferred to by the signal that optical cable 3500 receives to n light receiver 3520,3520n by first of each communication medium setting under communication medium 3320,3320n.
Below, understand the 3rd embodiment that comprehensive multi-media play service according to the present invention provides system.
Figure 18 provides the detailed pie graph of the 3rd embodiment of system for comprehensive multi-media play service according to the present invention.
With reference to Figure 18, comprehensive multi-media play service according to the present invention provides system 3200 to comprise wireless signal transmission/control part 3610, and it mates, carries out wireless 3600 after the conversion and send the signal that receives from the outside (signal relevant with phone/the Internet/digital broadcast etc.); And a plurality of broadcast reception systems 3300,3300n also comprise first to n reception of wireless signals section 3620,3620n, and it will send from wireless signal/and multi-media signal that control part 3610 receives is transferred to affiliated communication medium in real time.
Therefore, the other infrastructure of multi-media signal under the comprehensive multi-media play service of a third embodiment in accordance with the invention provides system not only to need not to append to be provided for and transmits, and the numerical data of transmission of large capacity at high speed.
Below, understand the 4th embodiment that comprehensive multi-media play service according to the present invention provides system.
Figure 19 provides the detailed pie graph of the 4th embodiment of system for comprehensive multi-media play service according to the present invention.
With reference to Figure 19, the comprehensive multi-media play service of a fourth embodiment in accordance with the invention provides system 3200, interconnect with a plurality of broadcast reception systems 3300,3300n by the general power line 3700 that is comprehensively formed by power line and holding wire etc., a plurality of communication mediums in broadcast reception system 3300,3300n also interconnect by the power line 3700 of single wiring line.
Therefore, comprehensive multi-media play service according to the present invention provides system 3200, when providing play service to affiliated communication medium, utilize the power line 3700 of single wiring line, thereby can reduce keeping/expense when safeguarding and improve efficient when infrastructure is constructed, and can reduce the error when transmission.

Claims (17)

1. the high-speed packet data transmission device in hybrid network is characterized in that, comprising:
Control part, its input and output multimedia data stream signal is also controlled the operation of each function part, thereby carrying out quadrature amplitude modulation processes, applicable IEEE 802.11 schemes, the base-band data stream signal is transformed to the signal of 2.4GHz frequency band high frequency, a traffic spike is assigned as an above data flow, and above channel signal of selection mixes and monitors in an above channel signal;
Base band part, it is connected in described control part, and in base band, traffic spike is carried out quadrature amplitude modulation, be useful in selected any one scheme among IEEE 802.11n and the IEEE 802.11g, and the forward error correction function of additional code and decoding, inspection error of transmission;
Radio-frequency head, it is connected in described base band part, and traffic spike is modulated into the high-frequency signal of 2.4GHz frequency band, and the high-frequency signal of 2.4GHz frequency band is demodulated into the base-band data stream signal;
Frequency conversion section, the high-frequency signal of the 2.4GHz frequency band that it will be introduced from described radio-frequency head is assigned as the high-frequency signal of identical more than one 900MHz frequency band, and in the high-frequency signal of an above 900MHz frequency band, select any one, thereby be transformed to the high-frequency signal of 2.4GHz frequency band, and cause described radio-frequency head;
Filtering section, it is connected in described frequency conversion section, and cuts off and remove noise signal from the high-frequency signal of the 900MHz frequency band that can receive and dispatch;
The matching part, it is connected in described filtering section, and the high-frequency signal of the 900MHz frequency band that can receive and dispatch carries out input and output according to the impedance matching state;
Hybrid network, it is connected in described matching part, and the high-frequency signal by coaxial cable and optical cable transmission 900MHz frequency band;
PLL section, it is connected in described frequency conversion section, and exports more than one center frequency signal;
PIC section, it is connected in described PLL section, and regulates the generation of the described more than one centre frequency of exporting by voltage control.
2. the high-speed packet data transmission device in hybrid network according to claim 1 is characterized in that:
In the described base band part, according to the control ﹠ monitor of described control part, the traffic spike that is applicable to send is removed and is recovered in the traffic spike that receives additional function.
3. the high-speed packet data transmission device in hybrid network according to claim 1 is characterized in that:
In the described radio-frequency head, the traffic spike of the base band that will introduce from described base band part is modulated into the high-frequency signal of 2.4GHz frequency band and supplies to described frequency conversion section, and the high-frequency signal of the 2.4GHz frequency band that will introduce from described frequency conversion section is demodulated into the traffic spike of base band and supplies to described base band part.
4. the high-speed packet data transmission device in hybrid network according to claim 3 is characterized in that:
In the described frequency conversion section, the traffic spike of a 2.4GHz frequency band will introducing from described radio-frequency head is assigned as the traffic spike of more than one 900MHz frequency band, and supplies to filtering section by channel.
5. the high-speed packet data transmission device in hybrid network according to claim 4 is characterized in that:
In the described frequency conversion section, the traffic spike of the more than one 900MHz frequency band of introducing from described filtering section, select more than any one, and be transformed to the traffic spike of 2.4GHz frequency band, and cause described radio-frequency head.
6. the high-speed packet data transmission device in hybrid network according to claim 4 is characterized in that:
In the described frequency conversion section, the high-frequency signal of the 2.4GHz frequency band that will introduce from described radio-frequency head is transformed to the high-frequency signal of the 900MHz frequency band of the more than one 40MHz of having channel width.
7. the high-speed packet data transmission device in hybrid network according to claim 6 is characterized in that:
In the described frequency conversion section, be the 20MHz interval with described each channel separation.
8. the high-speed packet data transmission device in hybrid network according to claim 7 is characterized in that:
The signal of described each channel is made of the signal of identical content.
9. the high-speed packet data transmission device in hybrid network according to claim 5 is characterized in that:
In the described frequency conversion section, according to the control ﹠ monitor of described control part, in a traffic spike with upper signal channel, the traffic spike of the channel that the indication of selective reception signal strength signal intensity is the strongest.
10. the high-speed packet data transmission device in hybrid network according to claim 9 is characterized in that:
In the described frequency conversion section, according to the control ﹠ monitor of described control part, in a traffic spike with upper signal channel, select the traffic spike of the minimum channel of transmitted error rate.
11. the high-speed packet data transmission device in hybrid network according to claim 10 is characterized in that:
In the described frequency conversion section, control ﹠ monitor according to described control part, in a traffic spike with upper signal channel, the traffic spike of the channel that the traffic spike of the channel that the indication of selective reception signal strength signal intensity is the strongest and transmitted error rate are minimum also mixes, thereby is transformed to a traffic spike.
12. the high-speed packet data transmission device in hybrid network according to claim 1 is characterized in that:
In the described PIC section, carry out control ﹠ monitor according to the control of described control part, so that described PLL section is that an above centre frequency of 40MHz and the channel spacing that is separated into 20MHz exports described frequency conversion section to channel width.
13. the high-speed packet data transmission device in hybrid network according to claim 12 is characterized in that:
In the described control part, described PIC section is carried out control ﹠ monitor, so that 2 center frequency signal of described PLL section's output.
14. a use comprises the described high-speed packet data transmission method in hybrid network of method of the device transmitting high speed grouped data of control part, base band part, radio-frequency head, frequency conversion section, filtering section, matching part, PLL section, PIC section, hybrid network, it is characterized in that, comprising:
The first process, when the input of the multimedia data stream signal of the base band of confirming according to described control part to send, thereby the control base band part is carried out quadrature amplitude modulation, and applicable IEEE 802.11 schemes, thus additional code and forward error correction function;
The second process, the base-band data stream signal that to introduce from described the first process is modulated into the high-frequency signal of 2.4GHz frequency band, and be transformed to the high-frequency signal of the 900MHz frequency band that is distributed into more than one channel, according to removing noise and matching status sends to hybrid network;
The 3rd process, when having been confirmed to receive the high-frequency signal of 900MHz frequency band from hybrid network by described control part, input according to matching status, and remove noise, will be in the traffic spike of the channel of received signal strength indicator and transmitted error rate the best selected any one traffic spike with upper signal channel be transformed to the high-frequency signal of 2.4GHz frequency band; And
The 4th process, the high-frequency signal of the 2.4GHz frequency band that will introduce from described the 3rd process is demodulated into baseband signal, and applicable quadrature amplitude demodulation and IEEE 802.11 schemes, decodes and the rear output of forward error correction processing.
15. the high-speed packet data transmission method in the hybrid network according to claim 14 is characterized in that,
Described IEEE 802.11 schemes are any one schemes of selecting in IEEE 802.11n and IEEE 802.11g,
The channel of described 900MH frequency band is that bandwidth is 40MHz, and channel spacing is 20MHz.
16. the high-speed packet data transmission method in the hybrid network according to claim 14 is characterized in that,
The data flow of described optimum channel be in the minimum channel of the strongest channel of received signal strength indicator, transmitted error rate selected any one, perhaps described selected any one above traffic spike is mixed, thereby improve the level of signal to noise ratio and amplification digital signal.
17. a comprehensive multi-media play service supplying method is characterized in that, comprising:
Step a when the multi-media signal that will receive from the outside provides system to send to a plurality of broadcast reception system by the comprehensive multi-media play service, connects described broadcast reception system and the comprehensive multi-media play service provides system by one-piece type single distribution;
Step b after the play signal that receives from the outside is mated, is modulated into the RF signal with the signal of described coupling;
Step c is transformed to image, sound and the caption signal consistent with the specific communications media in described broadcast reception system with the RF signal of described modulation;
Steps d, for the signal with described conversion is transferred to described specific communications media, thus distributing signal;
Step e is for so that the signal of described distribution is transferred to affiliated communication medium, under selecting behind the channel, to the described signal that is transformed of described selected transmission;
Step f, in the steps d of distributing described signal, when the position of described broadcast reception system changes to predetermined distance, programing change and the control of the described change of location of program control section executive basis;
Step g, autodiagnosis inspection/control part check the line status of described single distribution and the communication medium state in described broadcast reception system termly.
CN2011102631090A 2011-09-07 2011-09-07 High-speed grouped data transmission device and transmission method and comprehensive multimedia playing business providing method Pending CN102983950A (en)

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