CN102237925A - Method and system for realizing data broadcasting based on Beidou satellite mobile communication system - Google Patents
Method and system for realizing data broadcasting based on Beidou satellite mobile communication system Download PDFInfo
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- CN102237925A CN102237925A CN2010101655924A CN201010165592A CN102237925A CN 102237925 A CN102237925 A CN 102237925A CN 2010101655924 A CN2010101655924 A CN 2010101655924A CN 201010165592 A CN201010165592 A CN 201010165592A CN 102237925 A CN102237925 A CN 102237925A
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Abstract
The invention provides a method and system for realizing data broadcasting based on a Beidou satellite mobile communication system. The method comprises the steps as follows: based on the size of a sending window of a Beidou satellite mobile communication system, a data broadcasting server sends subframe broadcast data to the Beidou satellite mobile communication system through Ethernet; the Beidou satellite mobile communication system forwards the received subframe broadcast data to Beidou satellite mobile communication system terminals; and the Beidou satellite mobile communication system terminals combine the received subframe broadcast data into broadcast data. The invention can enable the broadcast data to be conveniently and quickly sent to the communication coverage range of the Beidou satellite, and can ensure that the Beidou satellite mobile communication system terminals can simultaneously acquire broadcast data homogeneously. The convenience of the technical scheme provided by the invention is especially outstanding for deserts, plateaus, mountains, islands and other regions where ground lines are difficult to lay and the laying of ground lines needs high cost.
Description
Technical field
The present invention relates to a kind of method and system that realize data broadcasting based on the big-dipper satellite mobile communication system.
Background technology
Beidou satellite navigation system is the Chinese independent development capability of implementing, the GPS (Global Position System) of independent operating, based on Beidou satellite navigation system, China just can interconnect with other system in the satellite mobile communication pilot system based on " Big Dipper " (hereinafter to be referred as the big-dipper satellite mobile communication system) of independent research, comprise and to interconnect with mobile phone, can interconnect with marine satellite, can the calcaneus rete network interconnect etc.
The big-dipper satellite mobile communication system comprises: by the space segment of Chinese big-dipper satellite redundant resource support; Have system continue control and exchange capacity and with the ground segment of ground public network interface; And the application section that higher antenna gain is arranged.Pilot system based on the existing redundant resource of " Big Dipper " satellite comprises link budget and l-G simulation test, the design and the realization technology of antenna, radio frequency and the baseband processing circuitry of terminal and comprehensive gateway station; Low rate speech coding and adaptive tranmission techniques, access control, calling control, exchange and network management technology reach the interworking technology with ground network, satellite resource monitoring and administrative skill, information encryption and network security technology etc.
Because satellite data broadcasting can satellite communication be a carrier, communication service is provided whenever and wherever possible, therefore, realize that based on the big-dipper satellite mobile communication system data broadcasting can greatly accelerate the civilian process of big-dipper satellite, become technical problem to be solved by this invention.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of method and system based on big-dipper satellite mobile communication system realization data broadcasting, Tong Xin mode realizes data traffic transmission easily via satellite.
For realizing above-mentioned purpose of the present invention, a kind of method based on big-dipper satellite mobile communication system realization data broadcasting is provided, this method comprises:
According to the size of big-dipper satellite mobile communication system send window, broadcast data server sends to described big-dipper satellite mobile communication system by Ethernet and divides the frame broadcast data;
The branch frame broadcast data that described big-dipper satellite mobile communication system will receive is transmitted to the big-dipper satellite mobile communication system terminal;
The branch frame broadcast data that described big-dipper satellite mobile communication system terminal will receive is combined into broadcast data.
Preferably, the size of described big-dipper satellite mobile communication system send window is 60Byte.
Preferably, described minute frame broadcast data comprises:
Synchronous head is used to indicate the beginning of branch frame broadcast data packet;
Broadcasting is numbered, and is used to indicate the classification of described broadcast data packet;
Whether retransmit sign, being used to identify this frame broadcast data is data retransmission;
The overall budget number is used to illustrate the overall budget number of described broadcast data packet;
The bag sequence number is used for indicating the sequence number of this frame broadcast data in the place broadcast data packet;
Broadcasted content is used for carrying the data message of this frame broadcast data.
Preferably, described broadcasting numbering can be recycled.
Preferably, described minute frame broadcast data also comprises: cyclic redundancy check (CRC) code.
Preferably, the described big-dipper satellite mobile communication system terminal branch frame broadcast data that will receive is combined into broadcast data and comprises:
Described big-dipper satellite mobile communication system terminal carries out verification to the branch frame broadcast data that receives;
Abandon the branch frame broadcast data of verification failure, the branch frame broadcast data of buffer memory verification succeeds;
After receiving end frame, the branch frame broadcast data of all buffer memorys is made up, obtain broadcast data.
Preferably, described big-dipper satellite mobile communication system terminal display of broadcast data.
Preferably, described big-dipper satellite mobile communication system terminal comprises portable terminal, car-mounted terminal and/or the fixed terminal of big-dipper satellite mobile communication system.
The present invention also provides a kind of system based on big-dipper satellite mobile communication system realization data broadcasting, and this system comprises:
Broadcast data server is used for the size according to big-dipper satellite mobile communication system send window, sends branch frame broadcast data by Ethernet to the input interface of described big-dipper satellite mobile communication system;
The big-dipper satellite mobile communication system, the branch frame broadcast data that is used for receiving is transmitted to the big-dipper satellite mobile communication system terminal;
The big-dipper satellite mobile communication system terminal, the branch frame broadcast data that is used for receiving is combined into broadcast data.
Preferably, the big-dipper satellite mobile communication system terminal comprises:
Verification unit is used for the branch frame broadcast data that receives is carried out verification;
Buffer unit is used for the branch frame broadcast data of buffer memory verification succeeds;
Assembled unit is used for after receiving end frame, and the branch frame broadcast data of all buffer memorys is made up, and obtains broadcast data.
The invention has the beneficial effects as follows:
The present invention is carrier with the satellite communication, and the content that broadcast data server will be broadcasted is broadcasted by the big-dipper satellite mobile communication system, can broadcast whenever and wherever possible; Need lay ground line with respect to prior art and just can realize the mode broadcasted, the present invention can make broadcast data arrive the big-dipper satellite overlayable scope of communicating by letter quickly and easily, and can guarantee the big-dipper satellite mobile communication system terminal acquisition broadcast data of homogeneity simultaneously; Especially, lay ground line difficulty and the higher area of cost, adopt its convenience of technical scheme of the present invention more outstanding for desert, plateau, high mountain, island etc.
Description of drawings
Fig. 1 illustrates the schematic flow sheet of realizing the method for data broadcasting in the embodiment of the invention based on the big-dipper satellite mobile communication system;
Fig. 2 illustrates the broadcasting format schematic diagram of application layer in the embodiment of the invention;
Fig. 3 illustrates the branch frame broadcast data form schematic diagram of network layer in the embodiment of the invention;
Fig. 4 illustrates the structural representation of realizing the system of data broadcasting in the embodiment of the invention based on the big-dipper satellite mobile communication system.
Embodiment
Describe the method and system that realize data broadcasting based on the big-dipper satellite mobile communication system of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 illustrates the method that realizes data broadcasting based on the big-dipper satellite mobile communication system according to of the present invention.
In step 101, according to the size of big-dipper satellite mobile communication system send window, broadcast data server sends branch frame broadcast data by Ethernet to the input interface of described big-dipper satellite mobile communication system.
In the present embodiment, the size of described big-dipper satellite mobile communication system send window is 60Byte.
Fig. 2 illustrates, and when the size of big-dipper satellite mobile communication system send window was 60Byte, at the form of the broadcasting that application layer adopted, this form comprised:
Type (1Byte) is used to indicate broadcast type, and for example, can adopt 0 expression broadcast type is text, and 1 expression broadcast type is voice, and 2 expression broadcast types are picture.
Length for heading (1Byte) is used in reference to the length that indicating is inscribed;
Title (the actual length that takies of title), the content that is used to carry title;
Content-length (1Byte) is used for the length of instruction content;
Content (the actual length that takies of broadcasted content) is used to carry the broadcasted content that all divide the frame broadcast data, divides the sum of frame broadcast data to be not more than 255, and maximum is 255*52=13260Byte.
When the size that Fig. 3 is illustrated in big-dipper satellite mobile communication system send window was 60Byte, at the form of the branch frame broadcast data that network layer adopted, this form comprised:
Synchronous head (2Byte) is used to indicate the beginning of branch frame broadcast data packet, for example, can specify a fixing value 0X7FFF;
Broadcasting numbering (7bit), similar broadcasting station channel number is used to indicate the classification of described broadcast data packet, can be recycled, and for example, effective value that can the designated broadcast numbering is 0-127;
Whether retransmit sign (1bit), being used to identify this frame broadcast data is data retransmission, for example, can specify 0 to be used for expression transmission first, and 1 is used for expression retransmits;
Overall budget number (1Byte) is used to illustrate the overall budget number of described broadcast data packet, i.e. this broadcasting what bags is made of, and for example, can specify effective value is 1-255;
Bag sequence number (1Byte) is used for indicating the sequence number of this frame broadcast data in the place broadcast data packet, and for example, can specify effective value is 1-255;
Broadcasted content (52Byte) is used for carrying the data message of this frame broadcast data;
Cyclic redundancy check (CRC) code (Cyclic Redundancy Code, CRC.1Byte), in the present embodiment, CRC comprises 8, that is: broadcasting numbering+re-transmission sign+overall budget number+bag sequence number+broadcasted content; The multinomial of CRC-8 is X
8+ X
2+ X+1;
Synchronous tail (2Byte) is used to indicate the end of branch frame broadcast data packet, for example, can specify a fixing value 0X7FF7.
In step 102, described big-dipper satellite mobile communication system is transmitted to the big-dipper satellite mobile communication system terminal by the branch frame broadcast data that output interface will receive.Input interface and output interface can be provided with, and also can integrate.
In step 103, the branch frame broadcast data that the big-dipper satellite mobile communication system terminal will receive is combined into broadcast data.
Concrete, described big-dipper satellite mobile communication system terminal carries out verification to the branch frame broadcast data that receives;
Abandon the branch frame broadcast data of verification failure, the branch frame broadcast data of buffer memory verification succeeds;
After receiving end frame, the branch frame broadcast data of all buffer memorys is carried out combined treatment, the broadcast data after making up is successfully shown.
Above-mentioned big-dipper satellite mobile communication system terminal can include but not limited to portable terminal, car-mounted terminal and/or the fixed terminal of big-dipper satellite mobile communication system.
Referring to Fig. 4, realize that based on the big-dipper satellite mobile communication system system of data broadcasting comprises according to of the present invention:
Broadcast data server 401 is used for the size according to big-dipper satellite mobile communication system send window, sends branch frame broadcast data by Ethernet to the input interface of described big-dipper satellite mobile communication system;
Big-dipper satellite mobile communication system 402, the branch frame broadcast data that is used for receiving is transmitted to the big-dipper satellite mobile communication system terminal;
Big-dipper satellite mobile communication system terminal 403, the branch frame broadcast data that is used for receiving is combined into broadcast data.
Wherein, described big-dipper satellite mobile communication system terminal can comprise:
Verification unit is used for the branch frame broadcast data that receives is carried out verification;
Buffer unit is used for the branch frame broadcast data of buffer memory verification succeeds;
Assembled unit is used for after receiving end frame, and the branch frame broadcast data of all buffer memorys is made up, and obtains broadcast data.
Adopting technical scheme of the present invention, can be carrier with the satellite communication, and the content that broadcast data server will be broadcasted is broadcasted by the big-dipper satellite mobile communication system, can broadcast whenever and wherever possible; Need lay ground line with respect to prior art and just can realize the mode broadcasted, the present invention can make broadcast data arrive the big-dipper satellite overlayable scope of communicating by letter quickly and easily, and can guarantee the big-dipper satellite mobile communication system terminal acquisition broadcast data of homogeneity simultaneously, especially, lay ground line difficulty and the higher area of cost for desert, plateau, high mountain, island etc., Tong Xin mode can realize data traffic transmission easily via satellite.
Although abovely describe the present invention in detail, to those skilled in the art, under the instruction of this paper, can make and kind revising and distortion, and not break away from the spirit and scope of the invention the present invention with reference to embodiment.
Claims (10)
1. realize the method for data broadcasting based on the big-dipper satellite mobile communication system for one kind, this method comprises:
According to the size of big-dipper satellite mobile communication system send window, broadcast data server sends to described big-dipper satellite mobile communication system by Ethernet and divides the frame broadcast data;
The branch frame broadcast data that described big-dipper satellite mobile communication system will receive is transmitted to the big-dipper satellite mobile communication system terminal;
The branch frame broadcast data that described big-dipper satellite mobile communication system terminal will receive is combined into broadcast data.
2. method according to claim 1, wherein, the size of described big-dipper satellite mobile communication system send window is 60Byte.
3. method according to claim 1, wherein, the frame broadcast data comprised in described minute:
Synchronous head is used to indicate the beginning of branch frame broadcast data packet;
Broadcasting is numbered, and is used to indicate the classification of described broadcast data packet;
Whether retransmit sign, being used to identify this frame broadcast data is data retransmission;
The overall budget number is used to illustrate the overall budget number of described broadcast data packet;
The bag sequence number is used for indicating the sequence number of this frame broadcast data in the place broadcast data packet;
Broadcasted content is used for carrying the data message of this frame broadcast data.
4. method according to claim 3, wherein, described broadcasting numbering can be recycled.
5. method according to claim 3, wherein, the frame broadcast data also comprised in described minute: cyclic redundancy check (CRC) code.
6. method according to claim 5, wherein, the branch frame broadcast data that described big-dipper satellite mobile communication system terminal will receive is combined into broadcast data and comprises:
Described big-dipper satellite mobile communication system terminal carries out verification to the branch frame broadcast data that receives;
Abandon the branch frame broadcast data of verification failure, the branch frame broadcast data of buffer memory verification succeeds;
After receiving end frame, the branch frame broadcast data of all buffer memorys is made up, obtain broadcast data.
7. method according to claim 6, wherein, this method also comprises: described big-dipper satellite mobile communication system terminal display of broadcast data.
8. method according to claim 1, wherein, described big-dipper satellite mobile communication system terminal comprises portable terminal, car-mounted terminal and/or the fixed terminal of big-dipper satellite mobile communication system.
9. realize the system of data broadcasting it is characterized in that this system comprises based on the big-dipper satellite mobile communication system for one kind:
Broadcast data server is used for the size according to big-dipper satellite mobile communication system send window, sends branch frame broadcast data by Ethernet to the input interface of described big-dipper satellite mobile communication system;
The big-dipper satellite mobile communication system, the branch frame broadcast data that is used for receiving is transmitted to the big-dipper satellite mobile communication system terminal;
The big-dipper satellite mobile communication system terminal, the branch frame broadcast data that is used for receiving is combined into broadcast data.
10. system according to claim 9 is characterized in that, described big-dipper satellite mobile communication system terminal comprises:
Verification unit is used for the branch frame broadcast data that receives is carried out verification;
Buffer unit is used for the branch frame broadcast data of buffer memory verification succeeds;
Assembled unit is used for after receiving end frame, and the branch frame broadcast data of all buffer memorys is made up, and obtains broadcast data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010165592.4A CN102237925B (en) | 2010-05-07 | 2010-05-07 | The method and system of data broadcast are realized based on Beidou satellite mobile communication system |
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| CN201010165592.4A CN102237925B (en) | 2010-05-07 | 2010-05-07 | The method and system of data broadcast are realized based on Beidou satellite mobile communication system |
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| CN102237925B CN102237925B (en) | 2016-04-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625268A (en) * | 2012-03-21 | 2012-08-01 | 广东省北斗应用技术支持中心 | System and method for realizing two-way short message communication between Beidou terminal and mobile phone |
| CN103108189A (en) * | 2013-03-01 | 2013-05-15 | 北京大学 | Beidou remote sensing image data transmission method |
| CN103354467A (en) * | 2013-06-03 | 2013-10-16 | 南京中网卫星通信股份有限公司 | Portable bidirectional interaction communication system based on Beidou satellite |
| CN103517212A (en) * | 2012-06-25 | 2014-01-15 | 北京宏远京信科技有限公司 | Civil information release system based on Beidou satellite system |
| CN107294878A (en) * | 2016-04-13 | 2017-10-24 | ***通信有限公司研究院 | Data transmission method, system and relevant device |
| CN111277319A (en) * | 2020-01-20 | 2020-06-12 | 中国电子科技集团公司电子科学研究院 | Inter-satellite-ground data transmission method and device |
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| CN101083501A (en) * | 2006-05-31 | 2007-12-05 | 中国科学院国家天文台 | Integration of navigation and communication based on time location and status information |
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Patent Citations (2)
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| CN1606857A (en) * | 2001-10-25 | 2005-04-13 | 高通股份有限公司 | Method and system for transferring ip packets by aggregating multiple wireless communication channels for high data rate transfers |
| CN101083501A (en) * | 2006-05-31 | 2007-12-05 | 中国科学院国家天文台 | Integration of navigation and communication based on time location and status information |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625268A (en) * | 2012-03-21 | 2012-08-01 | 广东省北斗应用技术支持中心 | System and method for realizing two-way short message communication between Beidou terminal and mobile phone |
| CN103517212A (en) * | 2012-06-25 | 2014-01-15 | 北京宏远京信科技有限公司 | Civil information release system based on Beidou satellite system |
| CN103108189A (en) * | 2013-03-01 | 2013-05-15 | 北京大学 | Beidou remote sensing image data transmission method |
| CN103108189B (en) * | 2013-03-01 | 2015-06-17 | 北京大学 | Beidou remote sensing image data transmission method |
| CN103354467A (en) * | 2013-06-03 | 2013-10-16 | 南京中网卫星通信股份有限公司 | Portable bidirectional interaction communication system based on Beidou satellite |
| CN107294878A (en) * | 2016-04-13 | 2017-10-24 | ***通信有限公司研究院 | Data transmission method, system and relevant device |
| CN111277319A (en) * | 2020-01-20 | 2020-06-12 | 中国电子科技集团公司电子科学研究院 | Inter-satellite-ground data transmission method and device |
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| CN102237925B (en) | 2016-04-20 |
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