CN102237925B - The method and system of data broadcast are realized based on Beidou satellite mobile communication system - Google Patents
The method and system of data broadcast are realized based on Beidou satellite mobile communication system Download PDFInfo
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- CN102237925B CN102237925B CN201010165592.4A CN201010165592A CN102237925B CN 102237925 B CN102237925 B CN 102237925B CN 201010165592 A CN201010165592 A CN 201010165592A CN 102237925 B CN102237925 B CN 102237925B
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Abstract
The invention provides a kind of method and system realizing data broadcast based on Beidou satellite mobile communication system, the method comprises: according to the size of Beidou satellite mobile communication system send window, and broadcast data server sends framing broadcast data by Ethernet to described Beidou satellite mobile communication system; The framing broadcast data received is transmitted to Beidou satellite mobile communication system terminal by described Beidou satellite mobile communication system; The framing broadcast data received is combined into broadcast data by Beidou satellite mobile communication system terminal.The present invention can make broadcast data arrive Beidou satellite communication overlayable scope quickly and easily, and can ensure that Beidou satellite mobile communication system terminal can the acquisition broadcast data of homogeneity simultaneously; Especially, ground line difficulty is laid for desert, plateau, high mountain, island etc. and the higher area of cost, adopt its convenience of technical scheme of the present invention more outstanding.
Description
Technical field
The present invention relates to a kind of method and system realizing data broadcast based on Beidou satellite mobile communication system.
Background technology
Beidou satellite navigation system be China implementing independent development capability, independent operating GPS (Global Position System), based on Beidou satellite navigation system, China just can interconnect with other system at the satellite mobile communication testing system based on " Big Dipper " of independent research (hereinafter referred to as Beidou satellite mobile communication system), comprise and can interconnect with mobile phone, can interconnect with marine satellite, can interconnect by calcaneus rete network.
Beidou satellite mobile communication system comprises: the space segment supported by Chinese big-dipper satellite redundant resource; Have system continue control and exchange capacity and with the ground segment of ground public network interface; And have the application section of higher antenna gain.Pilot system based on the existing redundant resource of " Big Dipper " satellite comprises link budget and l-G simulation test, the design and implimentation technology of the antenna of terminal and comprehensive gateway station, radio frequency and baseband processing circuitry; Low-ratespeech coding and adaptive tranmission techniques, access control, Call-Control1, exchange and network management technology and the interworking technology with ground network, satellite resource monitoring and management technology, information encryption and network security technology etc.
Because satellite data broadcasting can satellite communication be carrier, there is provided communication service whenever and wherever possible, therefore, realize based on Beidou satellite mobile communication system the civilian process that data broadcast greatly can accelerate 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 realizing data broadcast based on Beidou satellite mobile communication system, realize data traffic transmission easily by the mode of satellite communication.
For realizing above-mentioned purpose of the present invention, provide a kind of method realizing data broadcast based on Beidou satellite mobile communication system, the method comprises:
According to the size of Beidou satellite mobile communication system send window, broadcast data server sends framing broadcast data by Ethernet to described Beidou satellite mobile communication system;
The framing broadcast data received is transmitted to Beidou satellite mobile communication system terminal by described Beidou satellite mobile communication system;
The framing broadcast data received is combined into broadcast data by described Beidou satellite mobile communication system terminal.
Preferably, the size of described Beidou satellite mobile communication system send window is 60Byte.
Preferably, described framing broadcast data comprises:
Synchronous head, is used to indicate the beginning of framing broadcast data packet;
Broadcast numbering, is used to indicate the classification of described broadcast data packet;
Whether retransmit mark, be data retransmission for identifying this frame broadcast data;
Overall budget number, for illustration of the overall budget number of described broadcast data packet;
Bag sequence number, is used to indicate the sequence number of this frame broadcast data in the broadcast data packet of place;
Broadcasted content, for carrying the data message in this frame broadcast data.
Preferably, described broadcast numbering can be recycled.
Preferably, described framing broadcast data also comprises: cyclic redundancy check (CRC) code.
Preferably, the framing broadcast data received is combined into broadcast data and comprises by described Beidou satellite mobile communication system terminal:
The framing broadcast data that described Beidou satellite mobile communication system end-on receives verifies;
Abandon the framing broadcast data that verification is failed, the framing broadcast data of buffer memory verification succeeds;
After receiving end frame, the framing broadcast data of all buffer memorys is combined, obtains broadcast data.
Preferably, described Beidou satellite mobile communication system terminal demonstration broadcast data.
Preferably, described Beidou satellite mobile communication system terminal comprises the portable terminal of Beidou satellite mobile communication system, car-mounted terminal and/or fixed terminal.
The present invention also provides a kind of system realizing data broadcast based on Beidou satellite mobile communication system, and this system comprises:
Broadcast data server, for the size according to Beidou satellite mobile communication system send window, by the input interface transmission framing broadcast data of Ethernet to described Beidou satellite mobile communication system;
Beidou satellite mobile communication system, for being transmitted to Beidou satellite mobile communication system terminal by the framing received broadcast data;
Beidou satellite mobile communication system terminal, for being combined into broadcast data by the framing received broadcast data.
Preferably, Beidou satellite mobile communication system terminal comprises:
Verification unit, for verifying the framing broadcast data received;
Buffer unit, for the framing broadcast data of buffer memory verification succeeds;
Assembled unit, for after receiving end frame, combines the framing broadcast data of all buffer memorys, obtains broadcast data.
The invention has the beneficial effects as follows:
The present invention take satellite communication as carrier, the content that broadcast data server will be broadcasted is broadcasted by Beidou satellite mobile communication system, can broadcast whenever and wherever possible; Need to lay the mode that ground line just can realize broadcast relative to prior art, the present invention can make broadcast data arrive Beidou satellite communication overlayable scope quickly and easily, and can ensure that Beidou satellite mobile communication system terminal can the acquisition broadcast data of homogeneity simultaneously; Especially, ground line difficulty is laid for desert, plateau, high mountain, island etc. and the higher area of cost, adopt its convenience of technical scheme of the present invention more outstanding.
Accompanying drawing explanation
Fig. 1 illustrates the schematic flow sheet of the method realizing data broadcast in the embodiment of the present invention based on Beidou satellite mobile communication system;
Fig. 2 illustrates the broadcasting format schematic diagram of application layer in the embodiment of the present invention;
Fig. 3 illustrates the framing broadcast data form schematic diagram of network layer in the embodiment of the present invention;
Fig. 4 illustrates the structural representation of the system realizing data broadcast in the embodiment of the present invention based on Beidou satellite mobile communication system.
Embodiment
The method and system realizing data broadcast based on Beidou satellite mobile communication system of the present invention are described in detail below in conjunction with accompanying drawing.
Fig. 1 illustrates according to the method realizing data broadcast based on Beidou satellite mobile communication system of the present invention.
In step 101, according to the size of Beidou satellite mobile communication system send window, broadcast data server is by the input interface transmission framing broadcast data of Ethernet to described Beidou satellite mobile communication system.
In the present embodiment, the size of described Beidou satellite mobile communication system send window is 60Byte.
Fig. 2 illustrates, when the size of Beidou satellite mobile communication system send window is 60Byte, at the form of the broadcast that application layer adopts, this form comprises:
Type (1Byte), is used to indicate broadcast type, such as, 0 expression broadcast type can be adopted to be text, and 1 represents that broadcast type is voice, and 2 represent that broadcast type is picture.
Length for heading (1Byte), is used to indicate the length of title;
Title (the actual length taken of title), for carrying the content of title;
Content-length (1Byte), is used to indicate the length of content;
Content (the actual length taken of broadcasted content), for carrying the broadcasted content of all framing broadcast datas, the sum of framing broadcast data is not more than 255, and maximum is 255*52=13260Byte.
Fig. 3 illustrates when the size of Beidou satellite mobile communication system send window is 60Byte, and at the form of the framing broadcast data that network layer adopts, this form comprises:
Synchronous head (2Byte), is used to indicate the beginning of framing broadcast data packet, such as, can specify the value 0X7FFF that fixing;
Broadcast numbering (7bit), similar broadcasting station channel number, is used to indicate the classification of described broadcast data packet, can be recycled, such as, can designated broadcast numbering effective value be 0-127;
Whether, for identify this frame broadcast data be data retransmission, such as, 0 can be specified to send first for representing, 1 for representing re-transmission if retransmitting mark (1bit);
Overall budget number (1Byte), for illustration of the overall budget number of described broadcast data packet, namely this broadcast is made up of how many bags, such as, effective value can be specified to be 1-255;
Bag sequence number (1Byte), is used to indicate the sequence number of this frame broadcast data in the broadcast data packet of place, such as, effective value can be specified to be 1-255;
Broadcasted content (52Byte), for carrying the data message in this frame broadcast data;
Cyclic redundancy check (CRC) code (CyclicRedundancyCode, CRC.1Byte), in the present embodiment, CRC comprises 8, that is: broadcast numbering+retransmit mark+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 framing broadcast data packet, such as, can specify the value 0X7FF7 that fixing.
In step 102, the framing broadcast data received is transmitted to Beidou satellite mobile communication system terminal by output interface by described Beidou satellite mobile communication system.Input interface and output interface can be arranged, and also can integrate.
In step 103, the framing broadcast data received is combined into broadcast data by Beidou satellite mobile communication system terminal.
Concrete, the framing broadcast data that described Beidou satellite mobile communication system end-on receives verifies;
Abandon the framing broadcast data that verification is failed, the framing broadcast data of buffer memory verification succeeds;
After receiving end frame, the framing broadcast data of all buffer memorys is carried out combined treatment, will the display of the broadcast data successfully be combined.
Above-mentioned Beidou satellite mobile communication system terminal can include but not limited to the portable terminal of Beidou satellite mobile communication system, car-mounted terminal and/or fixed terminal.
See Fig. 4, the system realizing data broadcast based on Beidou satellite mobile communication system according to the present invention comprises:
Broadcast data server 401, for the size according to Beidou satellite mobile communication system send window, by the input interface transmission framing broadcast data of Ethernet to described Beidou satellite mobile communication system;
Beidou satellite mobile communication system 402, for being transmitted to Beidou satellite mobile communication system terminal by the framing received broadcast data;
Beidou satellite mobile communication system terminal 403, for being combined into broadcast data by the framing received broadcast data.
Wherein, described Beidou satellite mobile communication system terminal can comprise:
Verification unit, for verifying the framing broadcast data received;
Buffer unit, for the framing broadcast data of buffer memory verification succeeds;
Assembled unit, for after receiving end frame, combines the framing broadcast data of all buffer memorys, obtains broadcast data.
Adopt technical scheme of the present invention, can take satellite communication as carrier, the content that broadcast data server will be broadcasted be broadcasted by Beidou satellite mobile communication system, can broadcast whenever and wherever possible; Need to lay the mode that ground line just can realize broadcast relative to prior art, the present invention can make broadcast data arrive the overlayable scope of Beidou satellite communication quickly and easily, and can ensure that Beidou satellite mobile communication system terminal can the acquisition broadcast data of simultaneously homogeneity, especially, ground line difficulty is laid for desert, plateau, high mountain, island etc. and the higher area of cost, data traffic transmission can be realized easily by the mode of satellite communication.
Describe the present invention although above in detail with reference to embodiment, to those skilled in the art, kind of amendment and distortion can be made to the present invention under instruction herein, and not depart from the spirit and scope of the invention.
Claims (6)
1. realize a method for data broadcast based on Beidou satellite mobile communication system, the method comprises:
According to the size of Beidou satellite mobile communication system send window, broadcast data server sends framing broadcast data by Ethernet to described Beidou satellite mobile communication system;
The framing broadcast data received is transmitted to Beidou satellite mobile communication system terminal by described Beidou satellite mobile communication system;
The framing broadcast data received is combined into broadcast data by described Beidou satellite mobile communication system terminal;
Wherein, described framing broadcast data comprises:
Synchronous head, is used to indicate the beginning of framing broadcast data packet;
Broadcast numbering, is used to indicate the classification of described framing broadcast data packet;
Whether retransmit mark, be data retransmission for identifying this frame broadcast data;
Overall budget number, for illustration of the overall budget number of described framing broadcast data packet;
Bag sequence number, is used to indicate the sequence number of this frame broadcast data in the broadcast data packet of place;
Broadcasted content, for carrying the data message in this frame broadcast data;
Wherein, described framing broadcast data also comprises: cyclic redundancy check (CRC) code;
Wherein, the framing broadcast data received is combined into broadcast data and comprises by described Beidou satellite mobile communication system terminal:
The framing broadcast data that described Beidou satellite mobile communication system end-on receives verifies;
Abandon the framing broadcast data that verification is failed, the framing broadcast data of buffer memory verification succeeds;
After receiving end frame, the framing broadcast data of all buffer memorys is combined, obtains broadcast data.
2. method according to claim 1, wherein, the size of described Beidou satellite mobile communication system send window is 60Byte.
3. method according to claim 1, wherein, described broadcast numbering can be recycled.
4. method according to claim 1, wherein, the method also comprises: described Beidou satellite mobile communication system terminal demonstration broadcast data.
5. method according to claim 1, wherein, described Beidou satellite mobile communication system terminal comprises the portable terminal of Beidou satellite mobile communication system, car-mounted terminal and/or fixed terminal.
6. realize a system for data broadcast based on Beidou satellite mobile communication system, it is characterized in that, this system comprises:
Broadcast data server, for the size according to Beidou satellite mobile communication system send window, by the input interface transmission framing broadcast data of Ethernet to described Beidou satellite mobile communication system;
Beidou satellite mobile communication system, for being transmitted to Beidou satellite mobile communication system terminal by the framing received broadcast data;
Beidou satellite mobile communication system terminal, for being combined into broadcast data by the framing received broadcast data;
Wherein, described Beidou satellite mobile communication system terminal comprises:
Verification unit, for verifying the framing broadcast data received;
Buffer unit, for the framing broadcast data of buffer memory verification succeeds;
Assembled unit, for after receiving end frame, combines the framing broadcast data of all buffer memorys, obtains broadcast data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN102237925A CN102237925A (en) | 2011-11-09 |
| CN102237925B true CN102237925B (en) | 2016-04-20 |
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Families Citing this family (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 |
| 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 |
| 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 | 中国移动通信有限公司研究院 | Data transmission method, system and relevant device |
| CN111277319B (en) * | 2020-01-20 | 2022-08-16 | 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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