CN1142664C - Setting method and system of billion H2 RF digital platform - Google Patents
Setting method and system of billion H2 RF digital platform Download PDFInfo
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- CN1142664C CN1142664C CNB001122681A CN00112268A CN1142664C CN 1142664 C CN1142664 C CN 1142664C CN B001122681 A CNB001122681 A CN B001122681A CN 00112268 A CN00112268 A CN 00112268A CN 1142664 C CN1142664 C CN 1142664C
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Abstract
The present invention relates to a set method and a system for a kilomega radio frequency digital platform. A digital signal is transmitted in a coaxial cable at high speed by a radio frequency modulation method of multiplex analog, and every channel of a television is used to reach the transmission velocity of digital signal of 20-40-Mbps. The present invention is used for reforming a cable television system of a community closed circuit to form the kilomega radio frequency digital platform; the present invention supports the real combination of a television network, a telephone network and a computer network in the modes of low price and high performance, and establishes a solid foundation for the development of Internet2. The overall system is reformed to form a multi-layer annular structure by the present invention, and a cable television network becomes the foundation of a high-speed broadband network.
Description
One, technical field
This bright method to set up and system configuration thereof that relates to a kind of billion H 2 RF digital platform relates in particular to RF digital platform is set in coaxial cable, promptly the multi-channel analog rf modulations of digital signal, transmit and receive and unidirectional loop network system configuration.
Two, background technology
Universal day by day along with the internet, the cyberport notion of TV, phone, computer unification of three nets is accepted gradually, and digital mansion, digital sub-district, digital campus etc. propose successively.Its core is the network equipment of high bandwidth.
Because Development of Multimedia Technology, LAN (Local Area Network) has had every function of TV transmission, phone and data under the support of software, but bandwidth and be still the major limitation of its utilization in real time.For this reason, represent the Ethernet of LAN (Local Area Network) mainstream technology direction to develop into gigabit, now just consider as the main flow network equipment of digital sub-district from 10M, 100M.
But the problem of gigabit Ethernet is still more outstanding: 1, because the collision checking method of signal transmission makes the real-time of message transmission not to be guaranteed; 2, under the situation that the user increases, efficiency of transmission can descend significantly; 3, circuit is required height, interference ratio is responsive.4, price comparison costliness is generally only done to link to each other between the server.5, still need cable, telephone wire and computer network lines to introduce respectively at user side.Existing this method does not stand on the basis of unification of three nets veritably.
Three, summary of the invention
The objective of the invention is: according to the development of prior art, adopt a kind of new method that billion H 2 RF digital platform is set---build an energy technology elite of three nets organically combined, meet and exceed its basic technical indicator, really substitute three net work, overcome above-mentioned existing problems, have cheap at a high speed, the novel information network of high reliability.
Method of the present invention is achieved in that the method to set up of billion H 2 RF digital platform, with the digital signal demultiplexing, then in digital signal multi-channel analog rf modulations, with the digital signal demultiplexing, then in coaxial cable, analog modulation method with digital signal, each road is carried out the analog radio frequency modulation with frequency division or time-division to channel corresponding in the television transmission respectively, from the analog radio-frequency signal of each channel, demodulate each way word signal respectively at receiving terminal again, digital signal with each road combines at last, has reached up to the digital rate more than the gigabit.
The system of billion H 2 RF digital platform is that its structure comprises unidirectional ring-type topological structure: whole network is divided into multilayer, every layer of topological structure that all adopts ring-type.Each eye tail is connected in the loop control unit, and the user is articulated on the loop.The user only accepts the signal of place loop control unit, and only sends signal to place loop control unit, and the signal between the user is distinguished with the method for frequency division or time-division.Therefore, signal only needs the transmission of single direction, can not interfere with each other, and also can not stop up, and can satisfy voice etc. and require the use of the high occasion of real-time, and not need the bidirectional rebuilding of circuit.
To achieve the object of the present invention, the inventive method can also be for further processing to rf digital signal: promptly dynamically distribute bandwidth, handled by loop control unit according to user's the requirement (comprising uplink and downlink signals) that bandwidth resources are taken.Each so both can overcome the unbalanced restriction of upstream and downstream bandwidth that existing cable TV bidirectional rebuilding brings with being used to whole bandwidth per family, has improved utilization rate of channel resources; Can avoid serious noise regions and faulty section in the channel again, improve the signal to noise ratio and the robustness of signal transmission; And simplified requirement to the flow of transmitted information and the network equipment.
Characteristics of the present invention are: the digital platform with the inventive method can really substitute three net work, overcome the existing novel information network that has problems, has cheap high speed, high reliability.System of the present invention has extensibility: because each user is articulated on the customer controller, customer controller is articulated on the Cell Site Controller, and each Cell Site Controller can be articulated in the loop control unit of higher level (for example metropolitan area, economize domain controller) again, and the rest may be inferred.Therefore as long as increase the level of ring, the capacity of system just can ad infinitum be expanded, its addressing system is not only supported IPV4, and support IPV6, each user has the uniqueness address code, system is simple, reliable, two-forty and the feature of not having an obstruction can not be affected, and only is subject to the transmission rate of optical cable and the operational capability of loop control unit.
The present invention changes the tree topology structure of cable television system into ring-type topological structure that head and the tail all are connected to loop control unit, and each is used has the ability of accepting and sending signal per family, but only accepts the loop control unit signal, also only sends signal to loop control unit.Therefore, signal just only needs the transmission of single direction, has simplified the requirement of the signal transmission and the network equipment, and the bandwidth that can dynamically distribute each user, has improved resource utilization and quality management, has avoided the imbalance of up-downgoing.
The present invention is used for the closed circuit cable television system of cell range is transformed into billion H 2 RF digital platform, supports the real fusion that TV, phone and computer three are netted with low price, high-performance, and has established solid foundation for the development of Internet2 from now on.The present invention makes whole system the circulus of multilayer into, and cable television network becomes the basis of high-speed wideband net, also can be used as the key circuit of LAN (Local Area Network).The ring-type topological structure of layering has unlimited extensibility, has the feature that simple, reliable, two-forty, nothing are stopped up, can be as the basis of next generation Internet.
Four, description of drawings
The invention will be further described below in conjunction with accompanying drawing and according to embodiment:
Fig. 1 is a multi-channel analog rf modulations schematic diagram
The unidirectional circulus schematic diagram of Fig. 2
Fig. 3 is the block diagram of cell information network
Five, embodiment
For this reason, according to Fig. 3, we illustrate embodiments of the invention from the construction of a newly-built cell information network:
One, sub-district overview
There is 100,000 square metres construction area this sub-district, the household of family more than 1,000, and about 2 square kilometres of scope needs closed-circuit television, phone, surveillance and computer network---this a whole set of modern information network.
Two, starting point
(1) consider that modern information network has two basic points:
1, unification of three nets.Because Development of Multimedia Technology, TV, phone and computer three nets can integrate on digitized basis, needn't exert to build respectively again.
2, broadband.Because what offer the user now mainly is the 64Kbps passage of phone, therefore if surpass 64K just the someone said so the broadband, also have main line to widen a bit (at the most to the several G) broadband of also saying so.We think that this is inaccurate, and the broadband is not only in order to improve the notion of existing communication quality, and the more important thing is and be conceived to people's demand in future, so the broadband should have the content of these two aspects at least:
1) user side not only has the access of videl stage, and sending of videl stage should be arranged, because human accepting method the most direct, the most objective, most interested, amount of information at most is a video flowing, this just needs the above two-way signaling transmission rate of M level, and (concrete numeral can't be determined, because VCD is 1.5M, SDTV is 5M, and HDTV is 20M, and virtual 3d space is then more.) briefly, in not far future, every family can both have the bandwidth that a videl stage sends, " will there be 5,000,000,000 TV stations in the whole world ".
2) main line should have almost unlimited bandwidth, only in this way could support the two-way video flowing of end user terminal, transmission could not take place stop up, and just high QOS can be arranged.The people is arranged now at the signal transmission rate of considering T level (M level 1,000,000 times), not enough, should enlarge 1000 times again, to the signal transmission rate of P level (M level 1,000,000,000 times), even higher, it has been the P level since 2000 to " the information the Shinkansen " in Osaka that Tokyo was constructed by Japan.
Therefore, the groundwork that we will do is the main line that the user of videl stage is inserted infinite bandwidth, and this cans be compared to the viaduct system of constructing highway, or builds the irrigation and the flood discharge system in great river.
(2) user side
The access of user side divides wireless and wired two classes.Wireless have a TV, mobile phone, microwave, direct broadcasting satellite etc., and these two-way relatively difficulties, the bandwidth increase is subjected to the restriction of natural resources; Telephone twisted-pair feeder, television coaxial cable, computer split conductor, power line, optical cable etc.The twisted pair telephone frequency band is narrow, though the highest ADSL can accomplish descending 6Mbps, and up 384Kbps, two-way imbalance, stored-program control exchange can not recur channeling; The computer split conductor at first will have computer, and many users' wide area network needs expensive investment; Power line, bandwidth and interference are still waiting to overcome; Owing to superior performance, it is optimal that yes to the family for optical cable, but price is the factor that can't promote at present; Television coaxial cable, because of the popularity of its cheap price, connection and the signal bandwidth of G level are listed in first-selection, problem is to improve the radio modem ratio of performance to price, makes it to be accepted by the consumption level of China.
(3) the main network equipment
At present, the INTERNET/INTRANET technology that adopts local area network (LAN) is arranged, the ATM or the IP technology that adopt telecommunications are arranged ... these are all introduced, and one-time investment is quite big, can not satisfy whole technical indicators of three nets.A kind of communication controler of high performance-price ratio should be the key of dealing with problems.
Three, embodiment
The block diagram of sub-district information network among Fig. 3:
Consider China's national situation, can adopt simulated television and Digital Television and deposit that broadcast transmission and program request send also and deposit, data and voice are also deposited.Therefore, information is divided into three types: 1, the TV and the data of broadcast type transmission; 2, the TV and the data of unidirectional appointment formula transmission; 3, the voice-and-data of two-way mutual.Also can be divided into analog-and digital-two classes.
(1) the end channel allocation of registering one's residence
The end of registering one's residence of cable TV generally is the 550MHz60 cover system now.Can adopt PDTV (PDTV), single-definition digital television (SDTV) or high definition digital television (HDTV) as the case may be to Digital Television.The present invention program: broadcast type transmits and keeps 30 channels of simulated television, substitutes with digital form gradually again; The broadcast type of numeral sends (Digital Television) and unidirectional appointment formula sends (video request program VOD) 20 channels, can put 60--80 cover SDTV or 200--260 cover PDTV.Two-way data channel is 10 channels, by the bandwidth more than 250--500 the shared 200--400Mbps of user, can dynamically be distributed according to the need and possibility by customer controller.
(2) cell layer
Considering needs a Cell Site Controller (being a kind of loop control unit) at most to 2000 users, joins 4--8 customer controller (being another kind of loop control unit) again.Customer controller is shared the resource of sub-district main line with the method for frequency division, when Cell Site Controller will send data to client layer, only needing to send signal at the channel of correspondence gets final product, can not bump, Cell Site Controller also can be supported to carry out two-way signal communication with the loop control unit of same bandwidth and higher level simultaneously.See Fig. 2 and Fig. 1.
(4) client layer
Every 250--500 user forms a client layer, with a customer controller is the center, except that 50 channels that broadcast type sends and unidirectional appointment formula sends, 250--500 user shares the 200--400Mbps bandwidth of 10 channels in the mode of frequency division or time-division, and the service of M level transmission rate can be provided to the user.Simultaneously, the time delay of signal transmission also can be controlled within certain scope, satisfies the basic demand of phone.The present invention not only supports IPV4, and supports IPV6 the address code that each user provides uniqueness.
(5) control of information flow
The control of information flow is divided into following five kinds of situations: the packets of information of the transport stream of simulated television and the transport stream of Digital Television, digital telephone, the packets of information of compunication data and system's control data packets of information.The transport stream of simulated television sends to each user with the same usually with broadcast type or unidirectional appointment formula with the transport stream of Digital Television, and controller is not controlled, but can be supervised.Digital TV transmission stream has address code (IP sign indicating number) switch in addition, and whether the radio modem that is used to specify user side can be accepted, and the digital TV transmission stream of broadcast type, accurate on-demand and on-demand can be different in address code control.
The packets of information of digital telephone is to be responsible for signaling and phonological component A/D or D/A conversion by digital telephone set, compression and decompression, Code And Decode, package and unpacking, send and acceptance ... by the radio modem access network, carry out two-way communication again with loop control unit.In the control of information flow, the most important condition is the assurance of transmission real-time.
Same, the packets of information of compunication data is to be responsible for the data division package and to be unpacked by computer, sends and accepts, and by the radio modem access network, carries out two-way communication with loop control unit again.In the control of information flow, major requirement is bandwidth, transmission quality and repeating transmission control.
System's control data packets of information flows at special channel or period, and not high to transmission rate and bandwidth requirement, reliability is first.
(6) autgmentability
Certainly, in order to support the transmission of higher rate in the future, but can increase all the other users' utilized bandwidth to reduce number of users, also can on customer controller, increase the channel quantity of use at client layer.Finally can also allow the user directly be articulated on the cell layer, each user just can reach the above transmission rate of 20--40Mbps like this, and user's radio modem does not need to change.
In addition, the flyback of simulated television part also can be used to do the up of numeral, and the use channel of Digital Television or video request program part also can be adjusted, and the 550M system also can expand to 750M, 1G system even, and the bandwidth of Shi Yonging can increase greatly like this.
From this planning as can be seen: it supports the broadcast transmission of simulated television and Digital Television, also supports Video-on-demand; It can 64Kbs the real-time voice call of standard support, and time delay can be controlled within the acceptable scope; It supports data communication with the two-way speed of M level.These have comprised the basic function of three nets, and its index is considerably beyond the present level of the U.S., and whole investment is much less then.
Four, the editor the above, the application's main inventive point is
1, utilizes the multi-channel analog rf modulations method of digital signal, in each channel of television transmission, method with frequency division or time-division, with digital signal analog signal is modulated (mainly containing the RGB modulator approach of CN99114023 application and QAM, QPSK, 8VSB etc. at present) respectively, demodulate digital signal at receiving terminal from analog radio-frequency signal then.Like this, in cable tv coax,, just can reach the above digital rate of gigabit completely with the method for a plurality of combinations of channels.See Fig. 1.
2, present networks adopts the unidirectional ring-type topological structure of layering of the loop control unit that joins end to end, signal only needs the transmission of single direction, transmission and acknowledge(ment) signal are distinguished with the method for frequency division or time-division, can not produce interference between a plurality of users are mutual, and can in time obtain the transmission situation of circuit, be convenient to supervision, adjustment and verification, can satisfy the use that voice etc. require the high occasion of real-time.See Fig. 2.
3, each be with can sending per family and acknowledge(ment) signal, and can the resource of whole bandwidth be used, and so both can overcome the unbalanced restriction of upstream and downstream bandwidth, improves the utilance of channel; Can avoid serious noise regions and faulty section in the channel again, improve the signal to noise ratio and the robustness of signal transmission.
4, because the topological structure of network is layering, each user is articulated on separately the customer controller, each customer controller is articulated in again on separately the Cell Site Controller, as long as increase level, the capacity of system just can go down in unlimited expansion, and the complexity of system can't increase accordingly, only is subject to the transmission rate of optical cable and the operational capability of loop control unit.
5, the capital equipment of this network is for developing, support the radio modem of IP agreement, various loop control unit (customer controller, Cell Site Controller etc.), digital telephone set, digital television decoder etc. voluntarily.
6,, use the mode of storage forwarding, easily access to LAN, switched telephone network, internet etc. by the combination of software and hardware.
Claims (5)
1, the method to set up of billion H 2 RF digital platform, multi-channel analog rf modulations with digital signal, the digital signal demultiplexing, then in coaxial cable, analog modulation method with digital signal, each road is carried out the analog radio frequency modulation with frequency division or time-division to channel corresponding in the television transmission respectively, from the analog radio-frequency signal of each channel, demodulate each way word signal respectively at receiving terminal again, digital signal with each road combines at last, reached up to the digital rate more than the gigabit, it is characterized in that signal being controlled by loop control unit; Coaxial cable and optical cable constitute unidirectional ring-type topological structure: whole network is divided into multilayer, every layer of topological structure that all adopts ring-type, and each eye tail is connected in the loop control unit, and the user is articulated on the loop.
2,, it is characterized in that the user only accepts the signal of place loop control unit, and only send signal that the signal between the user is distinguished with the method for frequency division or time-division to place environment protection control device by the method to set up of the described billion H 2 RF digital platform of claim 1.
3,, it is characterized in that signal only needs the transmission of single direction by the method to set up of the described billion H 2 RF digital platform of claim 1.
4, by the method to set up of the described billion H 2 RF digital platform of claim 5, it is characterized in that also can utilizing the flyback of simulated television partly to do the up of numeral at client layer simultaneously, the use channel of Digital Television or video request program part also can be adjusted.
5, by the described billion H 2 RF digital platform of claim 1 system, it is characterized in that coaxial cable and optical cable constitute unidirectional ring-type topological structure: whole network is divided into multilayer, every layer of topological structure that all adopts ring-type, each eye tail is connected in the loop control unit, and the user is articulated on the loop.Each user is articulated on the customer controller, and customer controller is articulated on the Cell Site Controller, and each Cell Site Controller can be articulated in the loop control unit of higher level again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001122681A CN1142664C (en) | 2000-05-10 | 2000-05-10 | Setting method and system of billion H2 RF digital platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB001122681A CN1142664C (en) | 2000-05-10 | 2000-05-10 | Setting method and system of billion H2 RF digital platform |
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| CN1323120A CN1323120A (en) | 2001-11-21 |
| CN1142664C true CN1142664C (en) | 2004-03-17 |
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| CNB001122681A Expired - Fee Related CN1142664C (en) | 2000-05-10 | 2000-05-10 | Setting method and system of billion H2 RF digital platform |
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| CN100449997C (en) * | 2006-06-02 | 2009-01-07 | 华为技术有限公司 | Netting communication system and its node address distribution method |
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