CN101060362B - Satellite communication system-based multiple data service system - Google Patents
Satellite communication system-based multiple data service system Download PDFInfo
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- CN101060362B CN101060362B CN2007100983900A CN200710098390A CN101060362B CN 101060362 B CN101060362 B CN 101060362B CN 2007100983900 A CN2007100983900 A CN 2007100983900A CN 200710098390 A CN200710098390 A CN 200710098390A CN 101060362 B CN101060362 B CN 101060362B
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Abstract
The disclosed satellite communication based multiple data business system comprises: a business service center, including a data business interface connecting and receiving business data from all data business gateways and the ground receive center, a data storage unit, a protocol frame package/analysis unit packing former data and inserting into data segment in protocol frame, and a signal transmission unit conversing packed protocol frame into satellite signal for transmission; some user terminal, and gateways for connection. This invention frees to geographical condition limit.
Description
Technical field
The present invention relates to a kind of multiple data service system, relate in particular to a kind of multiple data service system based on satellite communication system.
Background technology
Satellite communication is meant and utilizes artificial earth satellite to transmit or reflect radio signals the communication of carrying out as relay station between the receiving center of two or more ground.Satellite communication system has global spreadability, fixing broadcast-capable, flexible allocation bandwidth and support advantage such as mobility as required, is a kind of best candidate scheme that data, services is provided to the user who is distributed in the whole world.If satellite communication system can cover whole earth surface through good design, this is to aviation and navigation user and to be in the user that the outlying district lacks ground communication infrastructure be very suitable, or even unique selection.Even in the intensive area of cable network, satellite communication also can be used as a kind of standby selection of crowded day by day terrestrial links.Satellite network is a broadcast system, for the point-to-multipoint of develop rapidly and multicast particularly wideband multimedia use and have special attraction.Satellite network can insert various networks as broadband access network, and simple communication service between fixing and the mobile phone users perhaps is provided.
Satellite communication system is made up of satellite and ground receiving center two parts.Wherein, be called communication satellite as the satellite of communicating by letter, the ground receiving center is meant and is located at the earth surface radio communication station of (comprising in ground, ocean and the atmosphere).Satellite plays relay station aloft, after promptly the electromagnetic wave that the ground receiving center is put forward amplifies again foldback return another ground receiving center.The ground receiving center then is the interface of satellite system and ground public network, and terrestrial user forms link by ground receiving center discrepancy satellite system.Because the overhead under the line about 3600Km of fixed statellite is consistent with one week of earth rotation (23 hours 56 minutes 4 seconds) just around earth week age, looks as transfixion from ground.Three satellites at a distance of 120 degree just can cover whole equator circumference.So satellite communication is easy to realize trans-oceanic and transcontinental communication.The frequency of suitable satellite communication is the 1-10GHZ frequency range, i.e. microwave frequency band.The major advantage of satellite communication is as follows: communication range is big, as long as the scope that the wave beam of satellites transmits covers all can communicate; Be not subject to land disaster influence; Construction speed is fast; Be easy to realize broadcasting and multiple access communication; Circuit and telephone traffic can be adjusted flexibly; Same channel can be used for different directions and zones of different.
Therefore, satellite communication has inborn advantage, has in fields such as television relay, GPS (Global Position System) (GPS, Global Positioning System) location, meteorologies more widely to use.With GPS is its application of example simple declaration.Gps system comprises communication satellite, GPS monitoring station, and parts such as user receiving equipment and GPS application software.Gps system can provide data such as continual location, navigation in the global range.The location for example can be provided, navigate, test the speed, data, services such as time service.GPS can provide high accuracy, round-the-clock, continuous, real-time three-dimensional localization, three-dimensional speed measurement and time reference simultaneously for global anywhere, any a plurality of users.Be most widely used in fields such as traffic, rescues at present.
Can predict, along with data congestion appears in mobile communication and Internet day by day, the intervention of satellite communication even replace the former and will become inevitable.Though satellite communication was at present come into operation a lot of years, civilian exploitation is still very limited.Hindering the universal factor of satellite communication has a lot, and one of its most important reason is that satellite communication system is an independent communication systems, and its data carried by data business is very limited, can not relevantly satisfy user's information requirement.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of multiple data service system based on satellite communication system, integrates the several data business, has improved the service quality of system.
For achieving the above object, technical scheme of the present invention is achieved in that a kind of multiple data service system based on satellite communication system, based on satellite communication system comprise and be used for communication satellite that relaying transmits and the ground receiving center that is used for satellite control and carries out data interaction with described communication satellite, this system comprises and is used to realize the business service center of each data service support and the user terminal that carries out data interaction with this business service center, and the Service Gateway in described business service center and ground receiving center and outside each data services network is connected;
Described ground receiving center resolves to Frame with the data-signal that receives after receiving the data-signal that communication satellite sends, and will keep for data extract in the data segment at business service center to go out in the Frame and be sent to the business service center; Described each data service gateway receives the service request at business service center, triggers the business of being supported, and service executing result is back to the business service center;
Described business service center comprises:
The data service interface, be used to connect each data service gateway and ground receiving center, send service request and receive the business datum that each data service gateway sends to each data service gateway, the business datum in the satellite communication protocol frame that reception ground receiving center parses;
Data storage cell is used to store the business datum that receives;
The protocol frame encapsulation unit is used for the upstream data that sends to communication satellite is encapsulated, and is inserted into the reserved data section in the satellite communication protocol frame;
Signal transmitting unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send.
Wherein, described user terminal comprises:
Protocol frame encapsulation/resolution unit is used for up data are encapsulated, and is inserted into the retention data section in the satellite communication protocol frame again, and the useful signal that the signal transmitting and receiving unit extracts is resolved to the satellite communication protocol frame;
Signal transmitting and receiving unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send, and go out the valid data signal part in the descending satellite communication signal extraction that receives;
Frame data are reserved the segment data extraction unit, are used for extracting the data that satellite communication protocol frame after the parsing is reserved section;
The data equipment interface is used to provide the access of peripheral data equipment.
Wherein, described ground receiving center comprises:
Signal transmitting and receiving unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send, and the satellite-signal that receives is converted to the satellite communication protocol frame;
Satellite communication protocol frame encapsulation/resolution unit is used for up data encapsulation is the satellite communication protocol frame and the descending satellite communication protocol frame that receives resolved;
Frame data are reserved segment data judgement and extraction unit, are used for judging whether the Frame reservation section after the parsing has data, if having then it is extracted, and is sent to business service centre data memory cell;
Business service centre data memory cell is used for the storage frame data and reserves the data that segment data is judged and extraction unit sends;
Business service centre data transmitting element is used for the data that business service centre data memory cell is stored are sent to the business service center.
Wherein, Service Gateway in the data services network of described outside includes but not limited to: be used to provide the Internet of network data service gateway, be used to provide the mail data service the mail gateway, be used to provide the public switch telephone network (PSTN of audio call, Public Switched Telephone Network) gateway and global system for mobile communications (GSM, the GlobalSystem for Mobile Communications) gateway that is used to provide mobile communication data business and speech business.
Wherein, described business service center, ground receiving center and user terminal include unique identification information respectively.
The present invention comes to provide various data services for the user by the business service center that is provided for data service and provides, this business service center is connected in Internet, mail server and GSM network respectively by Internet gateway, mail gateway and GSM gateway etc., and can provide business such as Internet, mail and information of mobile user transmission to user terminal, greatly enriched the class of business of satellite communication, made these business not be subjected to geographical conditions restrictedly to offer standby family terminal use.
Description of drawings
Fig. 1 realizes system configuration for multiple data service of the present invention and forms schematic diagram.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, multiple data service realization of the present invention system is on existing satellite communication system basis and set up.System of the present invention comprises business service center, some user terminals and satellite communication system.Wherein, satellite communication system comprises one or more satellites and one or more ground receiving center, satellite plays relay station aloft, after promptly the electromagnetic wave that the ground receiving center is put forward amplifies again foldback return another ground receiving center or authorized user terminal etc.The ground receiving center then is the interface of satellite system and ground public network, and terrestrial user forms link by ground receiving center discrepancy satellite system.The ground receiving center includes signal transmitting and receiving unit, satellite communication protocol frame encapsulation/resolution unit, frame data reservation segment data judgement and extraction unit, business service centre data memory cell, business service centre data transmitting element, terminal system, communication monitoring unit and power supply, wherein, the signal transmitting and receiving unit satellite communication protocol frame that is used for that encapsulation is finished is converted to satellite-signal and sends and the satellite-signal that receives is converted to the satellite communication protocol frame; The signal transmitting and receiving unit specifically is made of antenna, transmitter unit and receiving element, antenna picture a bite cauldron of ground receiving center, and its center is towards communication satellite, and diameter generally is 10.30 meters, is made up of antenna itself, feed part, tracking section and drive part.The audio frequency that transmitter unit is broadcast needs, video and relevant data signals are modulated on the carrier wave of communication satellite service band, after high-power amplification, are launched by sky alignment communication satellite.Receiving element receives the signal from communication satellite, extracts effective transmission signals after amplification, detection.Satellite communication protocol frame encapsulation/resolution unit is used for up data encapsulation is the satellite communication protocol frame and the downstream transmission signals that receives resolved to the satellite communication protocol frame; Satellite communication protocol frame encapsulation/resolution unit specifically can realize by central processing unit and the corresponding software of resolving, and for example can utilize special chip with encapsulation and analytical capabilities and realizes in conjunction with encapsulation and analysis program.Frame data reserve the segment data judgement and extraction unit is used for judging whether the Frame reservation section after the parsing has data, if having then it is extracted, and is sent to business service centre data memory cell; If there are not then other cell processing by the ground receiving center.Business service centre data memory cell is used for the storage frame data and reserves the data that segment data is judged and extraction unit sends; This business service centre data memory cell can be various erasable RAM memories or flash memory Flash.Business service centre data transmitting element is connected in the business service center by wired mode, is used for the data that business service centre data memory cell is stored are sent to the business service center.This wired mode can be optical cable or cable, connects by interfaces such as E1, STM1, STM4 or STM16.Terminal system is made up of carrier telephone terminal, television terminal equipment, facsimile terminal and data terminal equipment, and above-mentioned each terminal provides phone, TV, fax and data, services respectively.The communication monitoring unit is responsible for that each unit to the ground receiving center monitors, control and routine test.Power supply provides working power for each unit of ground receiving center.About the concrete structure of ground receiving center, more clearly for a person skilled in the art by aforesaid text description, the realization of each cell mesh also is very easy, does not therefore provide relevant structural representation.
As shown in Figure 1, the business service center comprises the data service interface, data storage cell, protocol frame encapsulation unit and signal transmitting unit, wherein, the data service interface is used to connect each gateway of each data service net and the business service centre data transmitting element of ground receiving center, send service request and receive the business datum that each data service gateway sends to each data service gateway by this data service interface, and the business datum that sends to the business service center in the satellite communication protocol frame after the receiving center parsing of reception ground, the i.e. data of being taken in the reserved data section in the satellite communication protocol frame.Data storage cell is used to store the business datum that receives, mainly be the data that the data service interface receives, comprise Service Gateway various data that send and that the ground receiving center sends, data storage cell of the present invention can be various erasable RAM memories or flash memory Flash.Among the present invention, the data of different types of the different units that the data business interface is received is stored respectively, for example, the data of sending for the ground receiving center that receives, mark a storage area specially, and the storage respectively by the difference of data type, will make things convenient for the management of data like this.The protocol frame encapsulation unit is used for the upstream data that sends to communication satellite is encapsulated, and definite, the data after the encapsulation are inserted into the reserved data section in the satellite communication protocol frame to these data according to service request from user.Protocol frame encapsulation unit of the present invention comprises terminal communication protocol frame encapsulation unit and satellite communication protocol frame encapsulation unit, terminal communication protocol frame encapsulation unit is used for encapsulating for the first time mailing to the up data of communication satellite, and satellite communication protocol frame encapsulation unit is used to generate the satellite communication protocol frame, and the terminal communication protocol frame that terminal communication protocol frame encapsulation unit is packaged is inserted into data segment in the satellite communication protocol frame as general data, this specific data segment is for setting in advance and appointing, promptly preamble is described be the data institutes reservation specially at business service center.The encapsulation format of the encapsulated message that adopts about terminal communication protocol frame encapsulation unit will be described hereinafter.Because the satellite communication protocol frame is existing frame structure, repeats no more here.The satellite communication protocol frame that signal transmitting unit is used for that encapsulation is finished is converted to satellite-signal and sends.Transmitter unit structure in the signal transmitting and receiving unit of the signal transmitting unit here and ground receiving center is identical, promptly include transmitting antenna and transmitter unit, about the function of transmitting antenna and transmitter unit, identical with in the receiving center of aforementioned ground repeats no more here.
User terminal of the present invention comprises: protocol frame encapsulation/resolution unit, signal transmitting and receiving unit, frame data are reserved segment data extraction unit and data equipment interface, wherein, protocol frame encapsulation/resolution unit is used for up data are encapsulated, be inserted into the data segment in the satellite communication protocol frame again, in the corresponding data section of the descending satellite communication protocol frame that receives, extract data, resolve again; The satellite communication protocol frame that the signal transmitting and receiving unit finishes encapsulation is converted to satellite-signal and sends and the satellite-signal that receives is converted to the satellite communication protocol frame.Data equipment interface (not shown) is used to provide the access of peripheral data equipment, and the data equipment interface can be a kind of in the interfaces such as E1, STM1, STM4 or STM16, also can be wave point, as the interface based on Bluetooth technology.Protocol frame encapsulation/resolution unit in the user terminal includes terminal communication protocol frame encapsulation/resolution unit and satellite communication protocol frame encapsulation/resolution unit, terminal communication protocol frame encapsulation/resolution unit is used for encapsulating for the first time mailing to the up data of communication satellite, and to being that the terminal communication protocol frame is resolved from the data in the reserved data section of setting in the satellite communication protocol frame.Satellite communication protocol frame encapsulation/resolution unit is used to generate the satellite communication protocol frame, and the terminal communication protocol frame that terminal communication protocol frame encapsulation unit is packaged is inserted into reserved data section in the satellite communication protocol frame as general data, simultaneously, the satellite-signal that receives is resolved to the satellite communication protocol frame.Here, the satellite communication protocol frame encapsulation/resolution unit of user terminal is all identical with the 26S Proteasome Structure and Function of ground receiving center satellite communication protocol frame encapsulation/resolution unit, repeats no more here.During use, user terminal is connected use by the data equipment interface with the peripheral hardware that data-handling capacity is arranged.Peripheral hardware such as individual PC, server, personal digital assistant PDA etc.Peripheral hardware is undertaken alternately by data equipment interface and user terminal, for example sends the defeated data of service request and tendency to develop etc. to user terminal, and it receives request-reply that user terminal sends and business datum etc. simultaneously.
Because the business service center is connected in the different data services networks by various data service gateways, therefore can provides as Internet, mail, PSTN and call out and business such as GSM calling network and information interaction to the user.Because above-mentioned business network and the corresponding equal comparative maturity of gateway technique, and, the technology that realizes the multibusiness network interface is also ripe relatively, therefore, realize that the gateway of above-mentioned network realizes that these business are feasible, as long as the corresponding business solicited message is sent to above-mentioned each gateway, these gateways will be handled these requests automatically, and return accordingly and reply.The present invention sends these response message encapsulation and gets final product.Peripheral hardware sends the corresponding business request by user terminal, user terminal carries out the terminal protocol encapsulation to it after receiving this service request, and be inserted in the corresponding data section of satellite communication protocol frame, be sent to satellite by the signal transmitting and receiving unit again, satellite is transmitted this signal to the ground receiving center, and the satellite communication protocol frame is resolved at this center, and solicited message is wherein sent to the business service center, the type of this service request is judged at the business service center, and is forwarded in the corresponding gateway.After receiving the response message that gateway returns, this response message is carried out the terminal protocol encapsulation, and after the satellite communication protocol encapsulation, be sent to satellite, be forwarded to the requesting users terminal by satellite, by being transmitted to peripheral hardware after the terminal parses by the signal transmitting and receiving unit.Below specifically describe for details.
When outside when being provided with data and need being transferred to gateway side user or business service central side user, transfer process is as follows:
The data of peripheral hardware are sent to user terminal of the present invention, after terminal communication protocol unit and the packing of satellite communication protocol element, form the satellite communication protocol frame, promptly form inbound data, send to the ground receiving center via communication satellite, the ground receiving center comes out the data extract in the particular piece of data in the satellite communication protocol frame according to user type, the transmission cable that is provided with between ground receiving center and business service center is transferred to the business service center, the business service center according to recipient's station address type of carrying in the data user data via gateway or directly be transmitted to the user, as numerical data transmission network (DNN, Digital Data Network) user, the cellphone subscriber; If not fixed-line subscriber is then just directly stored in order to inquiry.
The data of fixed-line subscriber can be forwarded to user terminal via communication satellite by the signal transmitting and receiving unit at business service center after the encapsulation of terminal communication protocol unit and satellite communication protocol element, user terminal returns to peripheral hardware after with data parsing.
Among the present invention, business service center, ground receiving center and user terminal include unique ID respectively, to determine identity separately in communication process.
With hydrology system applies is example, flow chart of data processing of the present invention can be described: hydrology system with backwoodsman hydrology data timing acquiring after, be transferred to user terminal of the present invention, user terminal utilizes the terminal protocol unit to encapsulate respectively these data, and then be inserted in the reserved data section of the satellite communication protocol frame that satellite communication protocol element generates, user terminal is converted to baseband signal with packaged Frame, be transmitted into communication satellite after the amplification, communication satellite forwards a signal to the ground receiving center, the ground receiving center receives the data in particular piece of data of extracting after the data in it, and be transmitted to the business service center, service centre gives the hydrology user monitoring center transfer of data according to purpose station address entrained in the data by Internet.If user monitoring center, opposite end failed to receive data at that time, can in certain period, do simultaneous operation, improve the flexibility of data processing.Simultaneously, remote data acquisition control flexible customization can be realized by system of the present invention to the instruction of user terminal to transmit data acquisition controlling in the user monitoring center.
Below describe the structure and the form of terminal communication protocol Frame of the present invention in detail.As shown in the table, be terminal communication protocol frame control section part.
Table 1
Peripheral hardware mainly comprises by terminal communication protocol and user terminal communication: SOT state of termination inquiry, return terminal's status information, SOT state of termination be set, query message serial number, outgoing message serial number.
Peripheral hardware sends the user terminal state query statement to user terminal, the inquiring user terminal operating status, and user terminal returns user terminal state information to peripheral hardware.User terminal state information comprises: channel receiving signal power level, passage locking satellite beams, response wave beam, signal suppressing, power supply state, Termination ID, logical broadcast address, service frequency, serial ports baud rate and verification and etc.The response wave beam is meant the satellite beams of the inbound response of user terminal, i.e. the user terminal satellite beams that is used for received signal number of receiving center registration earthward, and concrete regulation is identical with the definition that passage locks satellite beams.The central control system of ground receiving center was to the inhibition of terminal emission check-in signal when signal suppressing was meant the channel overload.0 expression does not have signal suppressing, and 1 expression has signal suppressing.Power supply state is meant whether the energy of terminal can satisfy the requirement of its operate as normal.0 expression can not be satisfied, and 1 expression can be satisfied.The service frequency is meant terminal when central control system application location, communication and time service service, and in the double time interval between inbound, unit be second; The setting of service frequency is limited by terminal use's grade, can not surpass the scope of user gradation regulation, can be provided with by peripheral hardware.The serial ports baud rate is meant that terminal utilizes the speed of serial ports transmission data, and 1 expression baud rate is 2.4Kbps, and 2 expression baud rates are 4.8Kbps, and 3 its baud rates of expression are 9.6Kbps, and 4 its baud rates of expression are 19.2Kbps, and the default baud rate of terminal is 9.6Kbps.
Behind the inquiring user terminal's status information, user terminal state is set.It is as shown in table 2 that the user terminal state data content is set, and the transmission direction of SOT state of termination data content director data is set be: from the terminal to the peripheral hardware, comprise service frequency, serial ports baud rate, response wave beam, receipt type, verification and.
| Frame head | The service frequency | The serial ports baud rate | The response wave beam | The receipt type | Verification and |
Table 2
Wherein serve frequency, serial ports baud rate, response wave beam with aforementioned consistent.The receipt type is used to open or close the system's receipt and the receipt of communicating by letter.System's receipt is the affirmation that the business service center gives originator, shows that the destination has received the communication information that originator sends.System's receipt is only applicable to single destination's communication pattern.The communication receipt is the affirmation that the destination gives originator, shows that the destination has received the communication information that originator sends.The originator of communication receipt may be that the business service center also may be the terminal of posting a letter.Verification and be meant message content is got the result that XOR draws by byte.
Peripheral hardware needs accurate control communication process, transmit message at every turn before, need the current message sequence of inquiry number.Or do not need accurate control then need not inquire about current message sequence number, before carrying out the application of overlength message communication, must inquire about current message sequence number, correct subpackage and group bag when message sequence number is used to guarantee message transmission.User terminal produces message sequence and number returns to peripheral hardware.
User terminal and user terminal communication mode at first will be carried out user terminal and user terminal communication application, and data content comprises: originator sign, destination addresses, security requirements, receipt sign, text length, verification and, as shown in table 3.
| Frame head | The originator sign | Destination addresses | Security requirements | The receipt sign | Text length | Verification and |
Table 3
User terminal is sent to satellite system with message after the encapsulation of satellite communication protocol element, satellite system is forwarded to the business service center.
User terminal is to the fixed-line subscriber apply by letter, and data content comprises: originator sign, destination addresses, destination's type, security requirements, receipt sign, text length, telegraph text content, verification and.
Wherein destination's type can be terminal use, Email user, GSM user, fax user, fixed telephone subscriber, call center (Call Center) user, Web user, DDN user, the directly actuated terminal use in business service center, business service center.User terminal need be inquired about up-to-date message to the business service center after start or catching satellite again.The application of communication receipt, the receipt content comprises: user terminal success received communication message, business service center success receiving terminal communication message, business service center success receiving terminal warning message, the receiving terminal communication of business service center are inquired about, successfully send to final fixed-line subscriber, are sent to final fixed-line subscriber failure.The apply by letter success will be returned the apply by letter success status.Content of Communication outputs to terminal or fixed-line subscriber.
As location class instruction and the instruction of GPS class etc., owing to be the conventional professional of satellite communication system, the present invention does not do too much description for service order commonly used in the table 1.
The above is preferred embodiment of the present invention only, is not to be used for limiting protection scope of the present invention.
Claims (3)
1. multiple data service system based on satellite communication system, based on satellite communication system comprise and be used for communication satellite that relaying transmits and the ground receiving center that is used for satellite control and carries out data interaction with described communication satellite, it is characterized in that, this system comprises and is used to realize the business service center of each data service support and the user terminal that carries out data interaction with this business service center, and the Service Gateway in described business service center and ground receiving center and outside each data services network is connected;
Described ground receiving center resolves to Frame with the data-signal that receives after receiving the data-signal that communication satellite sends, and will keep for data extract in the data segment at business service center to go out in the Frame and be sent to the business service center; Described each data service gateway receives the service request at business service center, triggers the business of being supported, and service executing result is back to the business service center;
Described business service center comprises:
The data service interface, be used to connect each data service gateway and ground receiving center, send service request and receive the business datum that each data service gateway sends to each data service gateway, the business datum in the satellite communication protocol frame that reception ground receiving center parses;
Data storage cell is used to store the business datum that receives;
The protocol encapsulation unit is used for the upstream data that sends to communication satellite is encapsulated, and is inserted into the reserved data section in the satellite communication protocol frame;
Signal transmitting unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send;
Described user terminal comprises:
Protocol frame encapsulation/resolution unit is used for up data are encapsulated, and is inserted into the retention data section in the satellite communication protocol frame again, and the useful signal that the signal transmitting and receiving unit extracts is resolved to the satellite communication protocol frame;
Signal transmitting and receiving unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send, and go out the valid data signal part in the descending satellite communication signal extraction that receives;
Frame data are reserved the segment data extraction unit, are used for extracting the data that satellite communication protocol frame after the parsing is reserved section;
The data equipment interface is used to provide the access of peripheral data equipment;
Described ground receiving center comprises:
Signal transmitting and receiving unit, the satellite communication protocol frame that is used for that encapsulation is finished are converted to satellite-signal and send, and the satellite-signal that receives is converted to the satellite communication protocol frame;
Satellite communication protocol frame encapsulation/resolution unit is used for up data encapsulation is the satellite communication protocol frame and the descending satellite communication protocol frame that receives resolved;
Frame data are reserved segment data judgement and extraction unit, are used for judging whether the Frame reservation section after the parsing has data, if having then it is extracted, and is sent to business service centre data memory cell;
Business service centre data memory cell is used for the storage frame data and reserves the data that segment data is judged and extraction unit sends;
Business service centre data transmitting element is used for the data that business service centre data memory cell is stored are sent to the business service center.
2. the multiple data service system based on satellite communication system according to claim 1, it is characterized in that the Service Gateway in the data services network of described outside includes but not limited to: be used to provide the Internet of network data service gateway, be used to provide the mail data service the mail gateway, be used to provide the gateway and being used to of the PSTN of audio call that the gateway of the GSM of mobile data and speech business is provided.
3. according to each described multiple data service system in the claim 1 to 2, it is characterized in that described business service center, ground receiving center and user terminal include unique identification information respectively based on satellite communication system.
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| CN2007100983900A CN101060362B (en) | 2007-04-13 | 2007-04-24 | Satellite communication system-based multiple data service system |
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