CN1273743A - System for selectively downloading information at user terminals from the internet using satellite broadcast system - Google Patents

Abstract

A satellite direct digital broadcast system is provided which broadcasts selected Internet information such as news reports, weather reports and stock market rates, along with radio programs. Broadcast channels comprise Internet information and a service control header to identify the type of Internet information contained therein. User terminals (22) are provided which comprise a radio broadcast receiver (2) to receive programs broadcast via satellite (20). Audio programs are played on a speaker connected to a radio broadcast receiver (21). The user terminals (22) also comprise a multimedia device such as a personal computer (29) connected to the receiver. The multimedia device is programmed to generate a computer display which prompts a user to select a topic of Internet information. The multimedia device stores received packets and selectively retrieves packets to generate displays such as Web pages using those packets which correspond to the topic of information selected by the user.

Description

In the system of user terminal applied satellite broadcast system from selectively downloading information on the internet

The field of the invention

Relate generally to of the present invention provides the system that broadcasts internet information to remote user terminals, and it does not need the back haul link from the user terminal to the Internet service provider.

Background of the present invention

Because the expansion of personal computer, communicator and internet and the whole world are used, global economy is current to experience the primary information revolution, can expect its important meaning can with the industrial revolution analogy mutually in 19th century.Yet, the resident of a myriad of is usually discontented be intended to they communication choose aspect service insufficient, thereby the ability that participates in this information revolution still is restricted at present.This part resident is in Africa, Central America, South America and Asia substantially, and it is poor that Na Li communication service up to now shows as the sound quality of shortwave broadcasting, and the area of coverage of amplitude modulation (AM) wave band and frequency modulation (FM) wave band terrestrial radio broadcast system is limited.

Proposed a kind of satellite-based direct radio broadcasting system, it can transmit the voice and data signal to Anywhere low price consumption receiver in fact on earth, comprises picture signal.Compare with existing satellite system, satellite-based direct radio broadcasting system has many advantages, allly if can provide service to portable receiver user.Many existing satellite systems can not provide portable service, because they require receiver to have big satellite earth antenna to insert this kind system.Though, many other existing satellite systems can provide portable and the mobile communication service, but these systems come the message transmission from internet and WWW (WorldWide Web) to many different users is provided required, the high net data transfer rate that goes out can for enough channel capacities.

Yet satellite-based direct radio broadcasting system is limited to unidirectional receiver, does not allow family allowable to send out speech or out of Memory.Therefore, the user of this class receiver can not carry out two-way communication by satellite-based direct radio broadcasting system, thereby can not enter the Internet.In many common Internet switch systems, but user's appliance computer is connected with the Internet access provider with communication link such as public switched telephone network (PSTN).Produce a series of screens on the display of subscriber computer, it points out the user to choose the information category that it reaches out for from the internet.For example, the user may choose Netscape Navigator (navigator) software that can give application to visit the file on the WWW part in the internet from Mountain View city Netscape communication common carrier in the California.Netscape Navigator software allows that the user imports the keyword relevant with selected theme, is sent on the Web search engine, to obtain the information of for example selected theme aspect.Do not have the communication link between configure user and the Internet access provider in the existing broadcasting radio receiver, the internet is carried out the selection and the download message of interactivity to utilize it.

Yet, the significant information of quantity is suitable for using so in large quantities on the internet, can make bandwidth and other satellite communication system efficiency of resource height in response to each user's request on the different communication channels, in the different time, be ready to identical information to different users.Therefore, exist requirement to the user terminal of low price, it can to the user provide satellite-based direct radio broadcasting system strong point (such as, big geographical, good sound quality, high go out net data transfer rate and low price), and the ability that receives the broadcast message of coming selected internet.

Summary of the present invention

In view of above-mentioned shortcoming and restriction, an object of the present invention is to provide a kind of satellite direct digital broadcast system, it can be to the selected internet information of low price user terminal broadcasting.Selected internet information for example can be the information of weather forecast, news report, stock market, consumer goods catalogue and other type.

A further object of the present invention is that the form with bag is broadcasted selected internet information type in broadcast channel.The Internet packets is the data flow on the broadcast channel of satellite direct digital broadcast system.A broadcast channel can carry one or more internet information type, such as news report, weather forecast and stock market price-list etc.Again, the Internet packets can comprise by means of browser and be used to the information (for example, the kind of internet information) of selecting the special page required.

A further object of the present invention provides out the low price user terminal that comprises a broadcasting radio receiver, and it is adapted to be connected on the multimedia device such as personal computer.

A further object of the invention is to provide a user interface to user terminal, is used to select the type of stored broadcast internet information, for display application on the user terminal.User terminal uses via the options of user interface input and checks the bag of being stored, and corresponding those bags of internet information type of selecting of people's rope and user.The application of multimedia device shows (for being broadcast between sound) all bag.

Of the present invention these some and other the reaching of purpose, partly by means of the long-distance user being provided so that the user terminal of broadcasting receiver and multimedia device to be installed, the former is in order to receive satellite direct radio broadcasting, the selected information that the latter comes from Internet service provider in order to storage and demonstration.User terminal is programmed, convert user's user profile options need, that indicate internet-type to such control signal, their instruction multimedia devices extract for those bags that receive corresponding with the user profile options, are used in to show or broadcast.

So in one aspect, Internet service provider disposes a gateway, selected multi-medium data is specified its route from internet/WWW to broadcasting station.The broadcasting station changes into the broadcast program that includes these bags with the Internet packets data format, and this broadcast program is sent on the satellite in the satellite direct digital broadcast system.The ISP provides additional information to identify some corresponding with different internet information types (for example, news report, consumer goods catalogue, then educational programs etc.) in broadcast program bags.

Another aspect the present invention is directed to a kind of method, provides the limited at least access in information service aspect that can give application by the internet to low price, global portable user terminal.This method is included in the multimedia device (for example, personal computer) that is connected to a broadcasting radio receiver and goes up the step that produces screen prompt.Screen prompt allows that the user therefrom makes one's options for the dissimilar internet information via a satellite direct digital broadcast system broadcasting.Receiver carries out demultiplexing and decoding to the data that receive the direct radio broadcasting system of self-defence star, to obtain broadcast channel.By the response of Computer Processing user to screen prompt, make computer in operation, extract bag selected in the broadcast channel, they have constituted the broadcast program that wherein comprises internet information.Multimedia device is at first stored in such as the mass storage device of disc driver from the next bag of broadcast channel, is used for subsequently for user capture.

Brief description of the drawings

Detailed description under reading in conjunction with the accompanying drawings will be more readily understood various purpose of the present invention, advantage and new features, and accompanying drawing is:

Fig. 1 is an overview example figure, and it passes through a satellite direct radio broadcast system to the users broadcasting internet information according to the preferred embodiments of the present invention;

Fig. 2 is a block diagram, shows the work in the broadcasting station of describing among bright Fig. 1 according to one embodiment of the invention;

Fig. 3 is an overview example figure, and it shows and brightly by the broadcasting station broadcast channel is formatted into the basic bit rate channel, is used for transmitting to the satellite that the Fig. 1 according to one embodiment of the invention describes;

Fig. 4 shows bright a kind of situation, and it is satellite-signal processing on the attainable star in the satellite direct radio broadcast system shown in Fig. 1;

Fig. 5 is a block diagram sketch, shows processing section on the star of satellite described in bright Fig. 1;

Fig. 6 is a block diagram that shows that bright user terminal constitutes, according to a preferred embodiment of the present invention, its device have a digital broadcasting transmitter and one such as personal computer many coal bodies device;

Fig. 7 is a flow chart, and when downloading selected bag from the broadcasting internet information that receives according to a preferred embodiment of the present invention, it has summarized a series of activities that is realized by the user terminal of Fig. 5; And

Fig. 8 is according to the computer screen of a preferred embodiment of the present invention by an example of user terminal generation.

In institute's drawings attached, similarly reference number is interpreted as referring to similarly part and parts.

Detailed description of preferred embodiment

Satellite communication system 10 of the present invention is described according to following general overview in the back:

I. system works is summarized

II. broadcasting station

III. satellite

IV. user terminal

I. system works is summarized

Referring to the system on Fig. 1 10, it allows that the user who is positioned at a distance uses the low price receiver and receives high-quality sound, data and image, and one or more broadcast channels of selecting to include internet information are downloaded to a computer that is connected to according to the present invention's receiver.System 10 preferably uses a satellite direct digital broadcast system and realizes.Direct digital broadcast system preferably is made up of three geostationary satellites (one of them is shown in 20 among Fig. 1), low price radio receiver or user terminal and relevant ground network.For example, show unique user terminal 22, it includes and is connected to the held radio receiver 21 on the multimedia device such as computer 29.

Broadcast program is sent on the satellite 20 via one or more broadcasting stations.As below will further describing, 26 pairs in broadcasting station includes sound, data or the two program and implements coding, multiplexing and other signal processing, produces the broadcast channel (BC) that transmits to satellite 20 in up link 28.Up link 28 preferably is the frequency division multiplexing carrier system, and they have carried with basic bit rate channel (PRC) is the BC of unit.Each PRC provides the basic bit rate increment (PRI) that base band is 16kbps.A BC preferably is made up of 1 to 8 PRC.For each PRC, in the inherent service control header of every 432ms (SCH) BC is distributed 224bit.BC carries all bag, and some bag formations wherein rise from the program of internet.According to the present invention, identify among the SCH of the type of internet information.Satellite 20 is realized the Base-Band Processing in the up links 28, sends out PRC among the BC to user terminal 22 at least one of three time division multiplexing down links 30.

Continuation is referring to Fig. 1, can provide with 25 multimedia messagess (for example, sound byte, video and the Web page) that directly come via system gateway 23 and hub 27 and from the internet to broadcasting station 26.System gateway 23 can be worked and be resembled an Internet service provider, and be implemented in usually show on 31 bright and on hub 27 combination the common work of two or more Internet service provider.

According to one aspect of the present invention, in system 10,, all offer broadcasting station 26 by the addressable news report in internet, weather forecast, stock market, then educational programs, consumer goods catalogue and out of Memory.Determine that by system 10 internet information of which kind of type will be broadcasted, and when broadcasts.Comprise a regional broadcast control device (RBCF) 39 in the system 10, it can be used for to the channel in the 26 assignment up links 28 of different broadcasting stations.For example, but one or more broadcasting stations 26 are given in a little channel assignments in the up link 28, are used for one day 24 hours Broadcast Journalisms continuously.It provides its stock market broadcasting station 26 may command in all broadcasting stations 26 between the operational period of specific securities market.On other time, this broadcasting station can be arranged and be broadcasted a stock market news analysis and regional news per half an hour at all.In addition, can arrange its broadcast weather forecast constantly on a broadcast channel to a broadcasting station, and in the daytime of another broadcast channel educational radio program and consumer goods catalogue simultaneously on the special time.The program table of broadcast program and their corresponding airtimes and channel are distributed in the user.So the user can determine, tuned receiver when and on which down link 30 to receive specific program, comprises the program that wherein includes internet information.

In addition, the browser page of different consumer goods broadcast program cover groups can be combined in (for example being ISP 31a) on the center, and be provided on one or more broadcasting stations 26.Present news focus and stock quotation of the same day can be provided on the browser page of consumer goods broadcast program cover group, simultaneously, the browser page that is specific to the physical culture focus can be provided on another consumer's broadcast page.Program material can obtain from the internet, only needs IP address to be positioned over they are carried out in the bag that selectivity downloads, and be presented at and be connected in the multimedia device on the receiver.

According to the present invention, each user terminal 22 is configured to receiver 21 reception satellite direct radio broadcast programs via satellite.As previously described, receiver 21 can tuningly be received from the broadcast program that comes among selected of three down links 30.Receiver 21 is configured to can demultiplexing and the selected down link 30 of decoding, that send out and offered the broadcast channel of down link 30 by satellite 20 to obtain from the broadcasting station 26.Data are handled and stored to the 29 pairs of demultiplexings of computer and the decoded data that are connected on the receiver 21, extract by user request, with the kind or the corresponding bag of type of selected internet information.Computer 29 is stored into information, announces this information then, just, information is shown on the computer display, perhaps plays the sound part in the selected internet information in the loud speaker on being connected in computer.

The application of multimedia device, the user can to from broadcast channel 100 information of a kind of particular type under demultiplexing, decoding and the storage (Fig. 3) request watch, listen to and store.Can use an input unit (for example, a mouse or a keyboard) responds to the screen prompt that computer 29 produces.Screen prompt is preferably for having one or more screens of menu, their tabulated out various information types (for example, news, weather, then educational programs, consumer products, stock market etc.) and icons accordingly.The user for example can use a mouse and come clickable icon.29 pairs of mouse inputs of computer are handled to determine which menu item selected, and announce out and the corresponding internet information of having stored of user's selection, and this will be in being described in further detail below in conjunction with Fig. 7 and Fig. 8.

There is very big advantage in system 10, because it can utilize satellite direct radio broadcast system for example to make user terminal 22 quite download quite a large amount of information from one or more Internet service provider in the highland with the ratio of performance to price efficiently.Various types of information such as news report and weather forecast is that so a large amount of people need, receive for you to choose to all user terminal 22 this kind of broadcasting information, the space segment that data are offered the user is at every turn asked that compares, more economical and effective.Except saving space segment, the internet information of broadcasting popularity also provides with the means selected from the internet information of broadcasting user terminal, do not need to revise broadcast system and make it to comprise that back haul link communicates the request and the response of Internet service provider with the user being used for, so that obtain internet information.

II. broadcasting station

Directly radio broadcasting system has been used the digital audio encoding technology.Every satellite 20 is sent out direct radio sound signal, the quality that provides in its whole area of coverage is equivalent to AM monophone, FM monophone, FM is stereo and CD is stereo, and directly transfer out auxiliary data together to user terminal 22, such as paging, video and text message.System can also transmit multimedia service, such as download giving the huge database of personal computer (PC) for business application, and the map of using for the traveller and the text message of printing, and be used for advertisement and amusement to strengthen the coloured image of sound programme.

Now, handle with reference to figure 2 clear signals, it will convert parallel data stream from the digital data stream in one or more broadcasting stations 26 to be transferred to satellite 20.For example, there is shown 4 programme information information sources 60,64,68 and 72.Two information sources 60 and 64 or 68 and 72 are encoded respectively and transmission together, as the part of single broadcast program or service.The coding that program to the information source 60 that comprises combination and 64 carries out will be described below.For the program of being made of information information source 68 and 72, its signal processing mode is identical.

Broadcasting station 26 will from one or more information sources 60 and 64 and the information sets that is used for a specific program be incorporated into each broadcast channel, the feature of each broadcast channel is that preferably the code check increment is 16kbps.This increment is called basic bit rate increment or PRI.Therefore, as shown in Figure 3, the bit rate that carries in broadcast channel 100 is n * 16kbps, and here, n is the number of the PRI that uses of concrete broadcast service supplier.In addition, each 16kbps PRI can further be divided into two 8kbps segmentations 101 and 103 (Fig. 3), and they are determined route together by system 10 or switch.Segmentation 101 and 103 provides a kind of method that carries two different service items in same PRI, such as the data flow of low bit voice signal, perhaps is used for two low bit rate voice channels of two kinds of language out of the ordinary, or the like.The number of PRI preferably is predetermined, just, sets according to the program sign indicating number.Yet number n is not a physical restriction of system 10.The numerical value of n is set on commercial basis usually, and this relates to the paying such as the price of single broadcast channel and ISP's wish.

For example, the n value that is used for first broadcast channel 59 of information source 60 and 64 equals 4.The n value that is used for the broadcast channel 67 of information source 68 and 72 is set at 6 in an illustrated embodiment.As previously described, the n value can change.For example, if one of information source 60,64,68 or 72 are information sources that is applied to broadcast internet information,, then will need the more PRI of big figure if particularly comprise a video section in the information.

Continuation can have more than one broadcast service supplier to insert single broadcasting station 26 referring to Fig. 2.For example, first ISP produces broadcast channel 59, and second ISP can produce broadcast channel 67.Here explanation and according to signal processing of the present invention can make the digital data stream that comes from several broadcast service suppliers with the parallel data stream mode to a satellite broadcasting, it has lowered ISP's broadcasting cost, and space segment is maximized the use.Reach peak efficiency by the utilization that makes space segment, can use the less parts of power consumption and accomplish that the cost in broadcasting station 26 is less.For example, wireless on the broadcasting station 26 can be very small aperture terminal (VSAT) antenna.Payload on the satellite is only required less memory, less disposal ability, thereby the lower power supply of power, and this will lower the weight of pay(useful) load.

Broadcast channel 59 or 67 be characterised in that as shown in Figure 3, the Cycle Length that frame 100 has is 432ms.The MPEG source encoder that will illustrate below the selection of this Cycle Length helps to use; Yet the frame period in the system 10 can be set on the different predetermined value.If Cycle Length is 432ms, then the PRI of each 16kbps needs every frame that 16,000 * 0.432s=6912bit is arranged.As shown in Figure 3, a broadcast channel thereby comprised these 16kbps PRI of n value, they consist of a group in frame 100.To illustrate below, these bits will be carried out scrambling to strengthen the demodulation ability in radio receiver 29.Scrambling work also provides a kind of method that adopts service to encrypt in ISP's Scheme Choice.Distributed n * 224bit corresponding to a service control header (SCH) 102 to each frame 100, the result makes every frame be total up to n * 7136bit, bit rate be n * (16,518+14/27) bps.The effect of SCH102 is each to be tuned to the radio receiver 29 that receives broadcast channel 59 or 67 transmit data, so that,, deciphering is transmitted key information in order to video data and image for various multimedia service control receiving modes, the receiver that addressing is specific, and provide other characteristic.Can provide selecting the required information of internet information SCH102, and provide with each type of service way of paying and be decrypted required information internet information.

As shown in Figure 2, the encoder 62 and 66 of application examples such as MPEG2.5, layer 3 comes information source 60 and 64 is encoded respectively.Two information sources then via blender 76 additions together, and are then, specified as processing module among Fig. 2 78, a processor in the applying broadcasting radio station 26 is handled, provide the coded signal in the frame period, just, comprise that SCH is every frame n * 7136bit at 432ms.In addition, in the SCH of BC, can also provide the information type identification data.

On Fig. 2 in the broadcasting station 26 specified each square frame corresponding to the programming module of carrying out by processor such as digital storage and encoder circuit and related hardware.Each bit in the frame 100 is used for the coding that FEC protects subsequently, has wherein used the encoding process that Digital Signal Processing (DSP) software, application-specific integrated circuit (ASIC) (ASIC) and routine integrated on a large scale (LSI) chip are made two cascades.At first, utilize Reed-Solomon (R/S) encoder 80a that the every 223bit that inputs to encoder is produced 255bit.Then, as specified among the reference number 80b, each bit in the frame 100 is resequenced according to known interleaving mode.Interweaving encoding can provide further protection to the error burst that takes place in the transmission, because this deinterleaving method is spread apart the bit that mistake is arranged in several channels.Continuation is referring to processing module 80, and its application Viterbi encoder 80c enforcement constraint length is 7 a kind of known convolutional encoding mode.Viterbi encoder 80c produces two output bits to each input bit, and the every frame 6912bit increment for providing in the broadcast channel 59 produces 16320 FEC coded-bits of every frame net result.Therefore, the broadcast channel (for example channel 59 or 67) of each FEC coding comprises n * 16320bit information, and they are encoded, resequence and encode, thereby no longer can identify the 16kbps PRI of original broadcasting.Yet the bit of FEC coding is according to original 432ms frame structure tissue.Behind error protection, total encoder bit rate is (255/223) * 2=2+ (64/223).

Continuation is referring to Fig. 2, and the broadcast channel frame of the FEC of n * 16320bit coding is then cut apart in channel dispenser 82 or demultiplexing becomes the parallel basic bit rate in n road to believe and (PRC), its each road carries the 16320bit of 8160 2bit glossary of symbols.This processing further is illustrated among Fig. 3.It is characterized in that having a SCH102 in the frame 100 of 432ms in the diagram of broadcast channel 59.Remainder 104 in the channel frame is made up of n 16kbps PRI, and for nPRI each, remainder 104 is corresponding to every frame 6912bit.Above about the explanation of module 80, the R/S 255/223 of cascade, interweave and FEC 1/2 convolutional encoding after obtained the broadcast channel 106 of FEC coding.

As previously described, include the 16320bit corresponding to 8160 2bit glossary of symbols in the broadcast channel frame 106 of FEC coding, for example, each symbol is by reference number 108 signs.According to the present invention, the distribution condition of each symbol on PRC110 as shown in Figure 3.Therefore, each symbol spread apart according to time and frequency, and this has further reduced the error code that causes because of the interference in the transmission on the radio receiver 21.For example, suppose that the ISP of broadcast channel 59 has bought 4 PRC, and the ISP of broadcast channel 67 6 PRC have been bought.Fig. 3 example first broadcast channel 59 and symbol 114 situation of in the PRC of n=4 110a, 110b, 110c and 110d, distributing respectively.In order on receiver, to realize recovery, placed the synchronous head of PRC in each PRC front respectively or be preamble 112a, 112b, 112c and 112d each 2bit symbol 114 collection.The synchronous head of PRC (after this, usually calling with reference number 112) comprises 48 symbols.The synchronous head 112 of PRC is placed on before each 8160 symbol group, by it, makes the number of symbols of each 432ms frame increase to 8208 symbols.Therefore, symbol rate becomes 8208/0.432, and institute is 19,000 (ksym/s) for each PRC110.48 symbol PRC preambles 112 are used for the synchronous of radio receiver PRC clock in fact, so that recover each symbol from down link satellite transmits 27.Handle on star in 116, the PRC preamble should be used for being absorbed in the timing difference between the symbol rate of using on the symbol rate that arrives uplink signal and the star, on the star symbol rate be used for switching signal be combined into the down link tdm traffic.The method of accomplishing this point is in the symbol rate calibration operation that adopts in the satellite 20 on star, each 48 symbol PRC is increased by one " 0 " or deducts one " 0 ", or do not do the work that adds deduct.Thus, the PRC preamble of delivery on the TDM down link is specified in the symbol rate calibration process, has 47,48 or 49 symbols.As shown in Figure 3, each symbol 114 is distributed to PRC in succession in a looping fashion, makes call sign 1 distribute to PRC110a, and symbol 2 is distributed to PRC110b, and symbol 3 is distributed to PRC110c, and symbol 4 is distributed to PRC110d, and symbol 5 is distributed to PRC110a, and the rest may be inferred.This PRC demultiplexing process realizes by a processor on the broadcasting station 26, and represented as the channel allocation among Fig. 2 (demultiplexing) module 82.

Use preamble module 84 and adder Module 85, the beginning that makes the assignment flag of PRC channel preamble go out PRC frame 110a, 110b, 110c and 110d in the broadcast channel 59.NPRC follows the precession differential coding, then, uses row's qpsk modulator 86 as illustrated in fig. 2 nPRC is modulated on the intermediate frequency carrier frequency by the QPSK mode.4 modulator 86a, 86b, 86c and 86d in the qpsk modulator are applied to PRC110a, 110b, 110c and the 110d in the broadcast channel 59 respectively.Therefore, there are 4 PRC intermediate frequency carrier frequencies to constitute broadcast channel 59.In 4 carrier frequencies each in up converter 80 by up conversion to being positioned on the frequency that X-band distributes their, so that be transferred to satellite 20.PRC through up conversion is sent to by amplifier 90 on antenna (for example VSAT antenna) 92a and the 92b subsequently.

The SCH102 that is inserted among the PRC of each coding preferably comprises a control word, in order to the program channel under the sign PRC, and carries and can make receiver that the PRC of coding is reconfigured instruction with the program channel that reconstructs coding.The 80bit control word of an example is: the #bit indication

2 relevant episode quantity (00=does not have relative, maximum 4 relevant episode)

2 set identifiers number (00=collection #1,11=collection #4)

4 collection types

(0000=audio frequency, 0001=video, 0010=data, other type or reservation)

16kbps basic bit rate channel (PRC) quantity in 3 collection (000=1 channel,

001=2 channel ..., 111=8 channel)

3 basic bit rate channel (PRC) identification numbers (000=channel 1 ..., 111=channel 8)

3 subclass quantity (000=1 ..., 111=8)

16kbps basic bit rate channel (PRC) quantity in 3 subclass (000=1 ..., 111=8)

2 subclass identification numbers (000=subclass #1 ..., 111=subclass #8)

3 collection/subclass obstruction (000=does not block, and the 000=Class1 blocks ..., the 111=type

7 block)

11 keep

40 CRC

The control word input bit that is used for relevant episode quantity can be set up a kind of relation between the cohort of each collection.For example, the broadcasting station can provide relevant audio frequency, video and data, services, the electronic newspaper of all audio texts and additional information.Set identifier number identifies the collection number of channel strip wherein.16kbps PRC quantity has been determined the number of basic bit rate channel in this collection in the collection.16kbps quantity is determined in a collection such as a kind of relation in the stereo collection of CD quality, to 4 PRC of " left side is stereo " signal employing, to " right stereo " 4 other PRC of signal employing in subclass quantity and the subclass.Another kind of situation, music signal can be associated with a plurality of announcers' voice signal, and each voice signal has different language.16kbps PRC quantity has been determined the number of basic bit rate channel in the subclass in the subclass.The subclass identification number identifies the wherein subset number of channel strip.

Collection/subclass is blocked bit can cooperate to come blocked broadcast information.For example, some country may forbid broadcasting advertisement for alcoholic drinks.The user terminal 22 that the sort of country is produced can preset a code, and perhaps another kind of method is to be loaded into a code, makes user terminal play response and block special information block signal.Blocking function can also be used for limiting the propagation of sensitive information (such as military affairs or government information), perhaps the certain user is limited the broadcast service that it wants taxes.

As previously described, the source of program signals with each coding is divided into each PRC.As an example, a sound information source can comprise 4 PRC, and it has represented the stereophonic signal of a FM quality.Another kind of situation, a sound information source can comprise 6 PRC, it can be as the stereophonic signal of " accurate CD " quality, perhaps 32bit data channel of a FM quality stereophonic signal link (for example, be used to transmit a signal, show) for going up in radio receiver LCD (LCD).Another kind of situation is arranged again, and 6 PRC can be used as the broadcast channel of a 96kbps.The image information source can only comprise a 16kbps channel and or several channel.As below further describing, the collection information that depends in the TDM frame and comprise among each PRC, user terminal 22 is preferably selected those PRC automatically, and they are that to produce digital audio program or other digital service program that the user selectes necessary.

According to the present invention, n single channel per carrier, frequency division multiple access (SCPC/FDMA) carrier wave set with volume in the 26 employed transmission methods of broadcasting station are incorporated in the up link 28.The centre frequency of these SCPC/FDMA carrier waves separates by grid, and they are space 38 preferably, 000Hz, and be arranged in 48 centre frequencies or the cohort of carrier channel in succession.The organizational form of these 48 carrier channel cohorts helps to be implemented in the demultiplexing and the demodulation process of carrying out on the star in the satellite 20.The cohort of each 48 carrier channel must be each other not in succession.The all carrier waves that are associated with a particular broadcast channel (also being channel 59 or 67) needn't be required to be in succession in one 48 carrier channel cohort, and do not need to be distributed in the same 48 carrier channel cohorts.So, allow that about Fig. 2 and the illustrated transmission method of Fig. 3 flexibility is arranged on frequency location is selected, can accomplish can using the filling capacity optimization of frequency spectrum, and avoid disturbing with other user of shared same radio frequency frequency spectrum.

Fig. 1 shows the overall work of understanding according to the system 10 of a preferred embodiment of the present invention, is used to broadcast internet information and other broadcast program.Under the occasion of satellite for processing payload mode, uplink signal 28 is provided from each broadcasting station 26 via each other frequency division multiple access (FDMA) channel by the broadcasting supplier, and each broadcasting station 26 can rest on the ground with greater than the visible satellite 20 in 10 ° the elevation angle Anywhere.Each broadcasting supplier can directly go to one of satellite 20 through up link by place one or more 16kbps PRC on the FDMA carrier wave from the facility of itself.Another kind of situation, the broadcasting supplier who does not have directly to insert satellite 20 abilities own can insert by a junction station.For example, system gateway 23 can directly or via hub 27 be broadcasted the Web page to one of direct radio broadcasting satellite 20 indirectly.Up link 28 is used FDMA, can be in a plurality of greatest possible flexibility that independently provided between the broadcasting station.

III. satellite

Directly the preferred satellite 20 of radio broadcasting system 10 uses can cover Africa-Arab zone from following geostationary orbit, the Asia is regional and Caribbean and zone, Latin America:

21 ° of E orbital positions provide service to the Africa and the Middle East.

95 ° of W orbital positions provide service to Central and South America.

105 ° of W orbital positions provide service to Southeast Asia and Pacific Rim.

To waiting the covering in other area, can provide with other satellite such as North America and Europe.

Directly radio broadcasting system is preferably used 1467 to 1492MHz frequency range, and in the WARC92 meeting, just according to ITU resolution 33 and 528, it has divided in the direct audio broadcasting (DAB) that is used in broadcasting satellite service (BSS).Broadcasting station 26 realizes that in 7050 to 7075MHz X-band up link presents.Every satellite 20 preferably disposes three down link spot beams, and the beamwidth of each spot beam is about 6 °.The area coverage of each spot beam is for be about 1,400 ten thousand square kilometres than the distribute power contoured surface of beam center decline 4dB, to be about 2,800 ten thousand square kilometres for the contoured surface of decline 8dB.When the gain-temperature with-13dB/K was the basis than receiver, the beam center margin of power was 14dB.

Every satellite 20 delivers two types payload.A kind of is " processing " payload, its regenerate uplink signal and make up three TDM downlink carriers, and another kind is " transparent " payload, it retransmits out uplink signal on three TDM downlink carriers.Each of TDM signal from two kinds of payloads transmits in three wave beams, and the signal of handling in each wave beam with transparent has opposite circular polarization (LHCP and RHCP).Each TDM down link signal delivers 96 PRC in institute's distributed time slot.For a user terminal 22, all TDM down link signals all show as identical, and just carrier frequency is inequality.The total capacity of every satellite is 2 * 3 * 96=576 PRC.

By means of processor on the star, can on satellite 20, realize the FDMA signal 28 of up link in the direct radio broadcasting system of Fig. 1 and the MF Multi-Channel Per Carrier of down link, the conversion between time division multiplexing (MCPC/TDM) signal 30.On satellite 20, each PRC demultiplexing that broadcasting station 26 is transmitted and be demodulated to 16kbps baseband signal out of the ordinary.By an interchanger route of respective channel is gone in one or more wave beams of 30 li of downlink beamformings, its each wave beam is a single TDM signal.This Base-Band Processing the uplink frequency branch mix and up link and down link between route determine on, can provide high-level channel control.On satellite, receive the uplink signal in the X-band, be transformed into L-band by processor on the star.Down link 30 to user terminal 22 has been used the MCPC/TDM carrier wave.In each of three wave beams of every satellite 20, use this kind carrier wave.In direct radio broadcasting system the FDMA up link is formatd, and implement payload and handle and produce under the situation of TDM down link, allow and use the low price receiver to receive mass data, comprise high-quality sound programme, and also have other advantage.

For transparent payload mode, be on the broadcasting station with the TDM signal combination, its structure accurately handles payload with satellite 20 on star and to make up their performances when such identical.The TDM signal is sent in X-band on the satellite, retransmits out with L-band in one of three downlink beamformings.The power level of down link TDM signal with handle the payload mode in produced identical.Therefore, here the explanation and according to the present invention carry out to all information services (for example, speech, music, data, image and the multimedia messages that can obtain from the internet) provide the technology of Digital Transmission, can doublely be applied in the processing payload and transparent payload mode on the star.When adopting transparent payload mode, the processing such as determining route that realizes on satellite 20 can be carried out on earth station.

Fig. 4 shows in the processing payload mode of understanding satellite 20 on Fig. 1, reallocation situation on the PRC star from up link FDMA channel to down link MCPC/TDM channel.Total uplink capacity preferably is 288 to 384 PRC in uplink channel frame 116, and each PRC is 16.519kbps.In downlink channel frame 118, select and multiplexing 96 PRC, be used for transmitting, and as shown in square frame 120, their time division multiplexinges are on a carrier wave of about 2.5MHz bandwidth at each downlink beamforming 30.The route of each uplink channel can be gone to all or some downlink beamforming, does not perhaps go to downlink beamforming.By command link, can select order and the position of PRC in the downlink beamforming fully from the remote measurement shown in Fig. 1, orientation and control (TRC) facility 38.

In regional broadcast control device (RBCF) 39, broadcasting station 26 or the more than one broadcasting station 26 that exists in the system 10 preferably provided software, in order in uplink beam to satellite 20 assignment space segment channels.RBCF39 preferably is connected on the TRC facility 38 by a communication link.In the time of can using when having living space in 48 channel cohorts, make software can accomplish to use best uplink spectrum by assignment PRC carrier wave.The all carrier waves that are associated with a particular broadcast channel do not need to be in continuously in one 48 carrier channel cohort, and do not need assignment in same 48 carrier channel cohorts.

Carrier frequency in each downlink beamforming 30 is different, to strengthen the isolation between the wave beam.Each TDM downlink channel carries out work with saturation condition in the satellite payload, provided the power efficiency of maximum possible with regard to link performance.For each transponder is the utilization of single carrier operation mode, becomes radio-frequency power with regard to solar energy converting, has reached maximal efficiency in the operation of satellite communication payload.This than the technology that need amplify numerous FDM carrier waves simultaneously much higher on efficient.This kind system can provide high reception allowance, is suitable for the fixedly reception of indoor and outdoors and moves receiving.

System 10 uses the source encoding that MPEG2.5, layer 3 realize sound, can be respectively 16,32,64 and the bit rate of 128kbps on reach described quality, also comprise the ability of implementing 8kbps code check coding.Image encoding adopts Joint Photographic Experts Group to realize.The error rate of whole system is less than 10-10, thereby is suitable for high-quality digital picture and transfer of data, uses for multimedia service.For identical sound quality, previous MPEG1, layer 2 (Musicam) or the MPEG2 standard of MPEG2.5, layer 3 encoding ratio have provided better bit rate efficiency.For sound radio, digitally coded source bits rate is:

Public monophony quality is 8kbps;

Unshared monophony quality is 16kbps;

The monophonic music of accurate FM quality is 32kbps;

The stereo music of accurate FM quality is 64kbps; And

The stereo music of accurate CD quality is 128kbps.

In the preferred embodiment of satellite direct radio broadcast system, the capacity of every satellite 20 is the total 3072kbps of every wave beam transmission (comprises 2 TDM carrier waves are respectively applied for handle in payload mode and the transparent payload mode), and it can be the combination in any of top voice service.The capacity of every wave beam will corresponding to:

192 tunnel monophony voice channels; Or

96 road monophonic music channels; Or

48 road stereo music channels; Or

24 road CD stereo music channels; Or

Any combination of top signal quality.

Because the Digital Transmission of 10 pairs of broadcast service of system provides the Direct Digital channel, so system 10 is data, image, live image and other multimedia messages of 20 broadcasting any kinds via satellite, such as the information that from internet and multimedia source, obtains, and speech and music.According to one aspect of the present invention, system 10 can be to (push) internet information of user terminal 22 transmission pushing, just, does not need approval that the user comes and 20 internet informations that transfer out via satellite.

Its bit error rate of digital signal (BER) of whole satellite direct radio broadcast system transmission is 10 ^-4Or lower, can provide the various service quality that the front is determined.For each downlink beamforming that in L-band, transmits by satellite 20.The footprint edges EIRP of TDM carrier wave is 49.5dBW.When using basic radio receiver antenna, this EIRP value can guarantee 10 together with special Forward Error Correction ^-4Minimum has the allowance of 9dB under the BER.This allowance helps to resist the loss of signal that causes because of the obstacle in the path between satellite 20 and the receiver on user terminal 22, can provide the reception of perfect quality thus in being predefined in the area of coverage.

For the user terminal 22 that the obstacle place is arranged, can be connected on the high-gain aerial, perhaps be connected on the antenna that is arranged in accessible place.For example, the reception in edifice may need a public roof antenna, and cooperating with indoor transmission again provides whole building to use, and is perhaps settling each other reception antenna near the window place.On the ground coverage of decline 4dB, be 10 with respect to BER ^-4The time defeated required power density, all channels have the allowance valuation of 10dB.At beam center, this allowance valuation is 14dB.

For higher bit rate, directly the operation allowance of radio broadcasting system does not change.In the scope district of 4dB, most of user terminals 22 watch the elevation angle of satellite 20 greater than 60 °, and feasible interference from building is actually zero.In some wave beam, in the scope of 8dB to the elevation angle of satellite 20 greater than 50 °, at this moment since the reflection that building comes or stop disturb sometimes.For pointing to horizontal some wave beam, during with little 8dBi gain antenna, even under the low elevation angle (10 ° to 50 °), the sight line reception also often is possible.

As previously described, include the payload of the Base-Band Processing in satellite 20 in the direct radio broadcasting system.For the budget of up link and down link, the management in broadcasting station and the control of down link signal, Base-Band Processing can provide improved systematic function.Fig. 5 shows bright satellite-signal processing in satellite direct radio broadcast system.In X-band receiver 122, the basic bit rate uplink carrier of received code.By each other FDMA signal in leggy demultiplexer and 6 48 channel group of demodulator 124 receptions, produce 6 analog signals, the data of 288 signals are divided into 6 tunnel time-multiplexed streams therein, and the serial data of every circuit-switched data stream is implemented demodulation.Route is switched and modulator 126 optionally make the route of each serial data channels go to whole in three road down link signals (delivering 96 channels in every road) or certain some, perhaps do not go to their theres, further on three road down link L-band TDM signals, modulate.The power amplification in addition of 128 pairs three road down link signals of travelling-wave tube amplifier (TWTA) is by L-band transmitting antenna 130 radiation earthward.Also comprise a demultiplexer and downconverter 132 and an amplifier group 134 in the path of transparent payload, they are by common " bending conduit (bent pipe) " signal path configurations, carry out the frequency translation of up link TDM/MCPC signal, for transmission again on L-band.

Satellite 20 is operated by Ground Control part (for example, in single broadcast radio station 26 or serving the software that can give application on the RBCF39 in a plurality of broadcasting stations 26), and requires to be managed by Flight Control Section during orbital lifetime according to volume of services.Bit rate and the service quality that obtains thus can be mixed in arbitrary wave beam, to satisfy demand for services.The instruction that the bit rate/quality state of service can be come by ground easily makes it to change, and can change on intraday different time.In a preferred embodiment, can be with by hour serve as basis change channel allocation according to the listing that sets in advance in 24 hours.Yet, it will be appreciated that channel allocation can be made change on the frequent degree of difference basis.

Referring to Fig. 2, each other qpsk modulator is arranged in each QPSK modulator blocks 86 with on each basic bit rate Channel Modulation to an intermediate frequency.On the FDMA uplink band, the channel behind up conversion transfers out by amplifier 90 and antenna 91 up converter 88 again with the frequency translation of each other basic bit rate channel.The up link broadcasting station preferably uses miniature antenna (2 to 3 meters of diameters) with basic (16kbps) channel of VSAT signal transmission.

Each basic bit rate uplink channel transfers to satellite 20 on each other FDMA carrier wave.As previously described, how can in their global uplink beam, be transferred on the satellite 20 to 288 up link basic bit rate carrier waves.From the national interior the three unities that sends program, use is equipped with the microminiature broadcasting station earth station terminal of 2.4 rice diameter paraboloidal X-band antennas and 25 watts of power amplifiers, can easily transfer out the program channel (wherein comprising 8 basic bit rate channels) of 128kbps to satellite 20.Another kind of situation can be connected to program channel on the shared up link earth station terminal by the PSTN terrestrial links of renting.This system has enough uplink capacities and uses in her whole world covers for each country, makes each country that the radio broadcast via satellite channel of himself be arranged.

IV. user terminal

The block diagram of one of user terminal 22 is given among Fig. 6 on Fig. 1.The L-band signal that user terminal 22 receives from satellite 20 is separated mediation and is extracted useful sound or picture signal, and recovers required sound or image information from tdm traffic.User terminal can be equipped with minitype paster (patch) antenna 80 of nearly 4 to 6dBi gains, and in fact it does not need to point to.User terminal 22 automatically tunes on the selected channel.

As previously described, time division multiplexing, MF Multi-Channel Per Carrier (MCPC/TDM) technology are applied to transmit to user terminal 22 in the down link.Each basic bit rate channel occupies the time slot of itself in the time-division data flow.These basic bit rate channel group carry program channel altogether in 16 to 128kbps scope.Date technology application can be so that comprise the use or the serial data interface of low bit-rate video, paging, Email, fax, flat-faced screen in wireless assistant service.This data and information can be multiplexing in the audio digital signals channel.In addition, the basic bit rate channel can deliver the program channel that demonstrates main screen (for example homepage of WWW) on user terminal, and it can have or not have sound programme, and data downloaded can and/or be printed and use for storage.

Each user terminal 22 can be tuned in one of footprint of a beam on the carrier wave in all TDM carrier waves of transmission.As shown in Figure 6, include digital broadcasting transmitter 21, antenna 136 and computer 29 in the user terminal 22.Receiver 21 can be connected on the serial port of computer 29 for example.Internet service provider in Fig. 1 the system gateway 23 can be operated in one of three satellites 20, two or the whole footprint of a beam.System 10 can change the FDM up link 28 of distributing to Internet service provider, and comes control information route on the star on the satellite 20 by software and remote measurement, changes the situation that it goes to one or more downlink beamformings.

In digital broadcasting transmitter 21, by low noise amplifier (LNA) 138 amplifying signals, amplifying signal is received by radio-frequency front-end and qpsk demodulator 140.The output feedback past first of radio-frequency front-end and qpsk demodulator goes adaptive multiplexer 142 and second to remove adaptive multiplexer 144, and the former recovers sound basic bit rate channel (PRC), and the latter recovers the basic bit rate channel that carries data (comprising image).

After the PRC of the n in the broadcast channel that receives is arranged again, use square frame 142 becomes the FEC coding with the 144 symbol demultiplexings with every road PRC broadcast channel.The output of square frame 142 is the baseband digital signals that carry acoustic information, and the output of square frame 144 is the baseband digital signals that carry data.

Thus, with coded program channel-decoding that recover, recombinant with deinterleave, to recover the base band basic bit rate bit stream of the system that originally on broadcasting station earth station 26, inputs to.Under the voice signal situation, make the bit stream of recovery change back analoging sound signal by voice decoder 146 and digital to analog converter 148.Analog signal is amplified by amplifier 150, resets with loud speaker 152.The bit rate that depends on program channel, the user terminal different sound quality of resetting out, stereo from the AM monophone up to CD.Under the data-signal situation, can convert the bit stream that recovers to displayable form by data decoder 154.Except showing, the data of reception can be stored in the storage arrangement, are perhaps printed.

User terminal is 22 needed, be combined into the instruction of the program channel of coding in order to basic bit rate channel that will coding, preferably is contained in the basic bit rate channel that is embedded in each coding and in original base band basic bit rate bit stream in the control word of (such as in SCH or PRC preamble).Receiver 21 is programmed instruction in the processing controls word.

According to one embodiment of the present of invention, as shown in Figure 3, in each BC, provided a SCH102.The data from data decoder 154 that comprise broadcast channel and SCH offer computer 29 via a broadcast channel I/O (BCIO) port.Computer 29 with storage on a disk drive 176 (Fig. 6).29 pairs of data of computer are handled to check all bag.Package informatin is selected to compare with using keyboard 170, mouse 174 or be connected in the user that other input unit on the computer 29 makes, with which bag in all the bag of determining to be stored to make to be used for being provided as output.The message identification data can provide the part as service control header (SCH) 102, identify all the bag that starts from same internet source.

The basic element of character in the computer 29 includes microprocessor 156, together with the random-access memory (ram) 160 and the read-only memory (ROM) 162 of right quantity, and real-time clock 164 and display controller 166.The form of the view data (such as the Web page data) of display 168 is gone in display controller 166 controls.Microprocessor 156 preferably also is connected on keyboard 170, printer/plotter 172, mouse 174 and the disk drive 176.Shown in bright microprocessor I/O (I/O) interface 158 represent the serial and the parallel port of microprocessor 156.As shown in Figure 6, the data by receiver 21 decodings can offer computer 29 by the serial port connection.Keyboard 170 and mouse 172 should be used for selecting broadcast program, regulate sound level, and carry out menu and choose, and similarly effect.According to the program code that is used for microprocessor 156 or the Web page that receives, can on display 168, produce menu and screen and monitor.Printer/plotter 172 can make the user except watching the image on display 168, and obtains the hard copy output of any reception data (comprising image).At last, disk drive 176 can be loaded into data or program in the computer 29, the data (such as the Web page) that receive can also be stored for after this watching, listen to and printing.The another kind of disk drive 176 may function for example be to allow that the data that have in advance of storing on image that computer 29 receives digital broadcasting transmitter 21 in real time or other data and the disk merge.Like this, for example help information, just can upgrade existing image or other data, and not need to transmit existing image or data by being sent to or revise.

Parts among Fig. 6 can be designed to be fit in the single machine box, for portable or mobile use.Another kind method, as shown in fig. 1, receiver 21 can be a kind of hand-held device, can be connected on the discrete computer 29.Providing of power supply can drive or the generator of handle drives by means of battery, solar battery cell or by clockwork spring.If user terminal 22 is installed on the vehicles such as boats and ships, airborne vehicle or motor vehicle, then power supply can be supplied with by the power supply on the vehicles.Whole parts with respect to user terminal 22 are fit in the single machine box, and user terminal 22 can be that the system or the network of the discrete parts that got up by suitable cable interconnect constitutes in the another kind of situation.

Fig. 7 is a flow chart, and it has summarized a series of activities that is realized by the user terminal of Fig. 5 when receiving the voice and data program.Be appreciated that, because downlink channel 30 is the TDM form, so user terminal 22 can receive and pay attention to sound programme and data simultaneously.Therefore, the user does not need to stop to listen to sound programme in order to receive image or other categorical data.As a result, the user who for example wants to obtain selected data from the internet can continue to listen to the sound programme on the sound programme channel when doing like this.

Now, specifically referring to the logic sequence shown in Fig. 7.In square frame 180, the program of the first step is that receiver 21 is powered up and initialization.In square frame 182, receiver 21 is tuned on one of three TDM down links 30 and receives.21 pairs of basic bit rate channels from institute's receiving downlink 30 of receiver carry out demultiplexing and decoding, and they are multiplexed in the broadcast channel that includes its SCH102 again.This broadcast channel can comprise real-time sound and image programs.In square frame 184, user terminal begin playback sound programme on the loud speaker 152 and on display 168 the reproduced image program.Broadcast channel also can comprise internet information, and they are stored in the disk drive 176 and use for non real-time.In square frame 186, computer 29 produces a screen 220 in the example subgraph 8 on display 168.Screen 220 is initial browser screens, and it provides the table of different message subjects that draw in Internet Broadcast to the user.

For such as this category information themes such as news report, weather forecast, stock market, consumer goods catalogue and maps, can provide corresponding icon and title on the screen 220.In square frame 188, the user can use keyboard 170, mouse 174 or other input unit and select one of each theme.

According to a preferred embodiment of the present invention, in square frame 190 and 192, handle for the stored information that on SCH102, obtains, identified the bag data type by computer 29, with the internet information type of selecting and representation is selected by the user.In square frame 198, specified as " Y " branch road and the square frame 198 of decision block 194, computer extracts the bag that the selection with the user is complementary, and wraps in according to these and to produce a screen on display 168.For example, can include in these bags and produce the Web page or have text and do not have the data of the computer screen of figure or video data.In addition, can comprise a sound byte in some bag, it can offer an additional loudspeaker 178 that is connected directly on the computer.If selected data are subsidiary a sound byte, then by loud speaker 152 acoustical reproduction syllable purposes this sound byte of can also resetting simultaneously.In square frame 196, select not corresponding bag for the user on its message identification data and the screen 220, computer 29 is left out of account.

Current in disk drive 176 the canned data theme all be shown on the screen 220.Meanwhile, disk drive 176 can store up into new internet information collection, also is current information that receiving, that watch for the user later on.Therefore, in the new internet information of disk drive storage, can allow user search and watch canned data.Computer also can be stored the information such as long-distance education under real-time condition, use later on for the user.

There is its advantage in system 10 of the present invention, and it can provide digital transmission channel to remote user terminals, is used for voice broadcast, music and data of different types, such as image and live image; And multimedia messages.Therefore, the user terminal that does not have to enter the Internet can receive (push) internet information of pushing, also promptly broadcasts internet information, and it need be from the approval of remote subscriber.According to another aspect of the present invention, can provide for example terrestrial links of public switch telephone network (PSTN) link to user terminal, in order to communicate with an informant.For example, the user can 20 receive the educational radio program via satellite in the heart from a long-distance education, comprise speech, text and view data.The user can be sent out replying then educational programs via PSTN chain road direction long-distance education center or another place.When the PSTN link lacked speech that enough bandwidth carry program, text and view data, this structure had advantage greatly.

Though, with reference to preferred embodiment the present invention has been described, it will be understood that the present invention is not restricted to those details.Proposed various substituting and modification in the explanation in front, and the common skilled person in the present technique field also can make other change.As stipulating in the appending claims, all this type of substitute and revise and all think to wrap the farmland within the scope of the present invention.

Claims (10)

1. one kind provides system from the information of at least one telecommunications network to user terminal, comprising:

A receiver;

A satellite, configuration receives a broadcast channel that includes all bag, in bag, comprising described information, described information is associated with one of a plurality of themes at least, described broadcast channel includes such data, it has indicated which bag of described all bag corresponding to which theme in described a plurality of themes, and described again satellite transmits described broadcast channel to described receiver at work;

A processing unit is connected on the described receiver;

A user input apparatus is connected on the described processing unit; And

A display unit that is connected on the described processing unit, described processing unit is able to programme accomplishes to produce a screen display on described display unit, select one of described a plurality of themes with the prompting user, described receiver offers described processing unit with described all bag at work, when using described screen, described user makes one when selecting, described processing unit is handled an input signal that is produced by described user input apparatus at work, and check described data so that determine, which of described all bags is corresponding to an input signal, and described display unit is subjected to the control of described processing unit and demonstrates and the corresponding described information of described input signal.

2. the system as claimed in claim 1 also comprises a multimedia device that is connected on the described receiver, comprises one of following message in the described information at least: data, figure, rest image, moving image, text, sound, the Web page, and video; Described multimedia device depends on described input signal at work, at least carry out one of multinomial work, be to include one of following message that shows at least in the described input signal: described data, described figure, described rest image, described moving image, described text, the described Web page and described video, and play described sound.

3. the system as claimed in claim 1, also comprise at least one Internet service provider computer and be connected to system gateway of described telecommunications network and be connected to a broadcasting station of described at least one Internet service provider and a system gateway, described broadcasting station receives described information at work from described at least one Internet service provider and a system gateway, described information format is dissolved in the described broadcast channel that has described data (it indicates described bag corresponding in described a plurality of themes which), and to the described broadcast channel of described satellite transmits.

4. system as claimed in claim 3 also comprises a hub, in order to described broadcasting station is connected on the described system gateway.

5. a broadcast message is gone to the method that comprises a radio receiver and the user terminal of coal body device more than through satellite from Internet service provider, and does not have back haul link between user terminal and ISP, and this method comprises step:

The broadcast channel that will include all bags of internet information formats, and which of described a plurality of themes the identification data that these bags relate to a plurality of themes and are used to transfer to described user terminal, described identification data identify described all bag corresponding to;

Transmit described broadcast channel to described user terminal via satellite;

On a plurality of described user terminals, receive described broadcast channel;

Use described multimedia device and produce a menu, the described a plurality of theme of tabulating out;

Corresponding to a theme of from the above a plurality of theme of described menu, selecting, determine a user input signal;

Use described identification data and determine in described all bags which corresponding to described user input signal; And

Using described multimedia device exports and corresponding described all the bag of described user input signal.

6. method as claimed in claim 5 wherein, comprises in the described formatting step making the formative step of internet information, at least comprise one of following message in this internet information: news report, weather forecast, stock market price-list, then educational programs, and consumer goods information.

7. method as claimed in claim 6, wherein, the step of described generation menu comprises:

Use described multimedia device and make menu option, identify one of following message at least: described news report, described weather forecast, described stock market price-list, described then educational programs, and described consumer goods information; With

Provide a prompting, be used to instruct the user to select one of described menu option.

8. method as claimed in claim 5 wherein, also comprises with the formative step of programme information the corresponding airtime that programme information has indicated described a plurality of theme and has been used to receive on described user terminal in the described formatting step.

9. method as claimed in claim 8 wherein, is used described programme information and described user terminal is programmed upgrade described menu.

10. satellite broadcast communication system that is used to broadcast internet information comprises:

A plurality of receivers;

At least one broadcasting station that is used for transmitting broadcasting channel, all the bags and the data that include different internet information types in the broadcast channel, this Data Identification go out which bag in described all the bag corresponding in the described different internet information types which kind; And

Be used to receive described broadcast channel and be used for transmitting a satellite of described broadcast channel to described a plurality of receivers;

Wherein, at least one receiver in described a plurality of receivers receives described broadcast channel, and described receiver includes a multimedia device, and it has

A storage arrangement is used for storing all the bag that obtains from described broadcast channel,

An output device is used for pointing out the user to make a selection from a plurality of dissimilar internet informations,

An input unit allows that the user makes described selection, and

A processor, it is programmed and retrieves those selected bags in described all bags of storing in the described storage arrangement, and they are corresponding to described selection, and those bags of selecting described in will described all bag offer described output device.

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