CN107623955A - Big Dipper base station and the message information exchange method based on Big Dipper base station - Google Patents
Big Dipper base station and the message information exchange method based on Big Dipper base station Download PDFInfo
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Abstract
The present invention relates to a kind of Big Dipper base station and the message information exchange method based on Big Dipper base station.The Big Dipper base station, including star-like transmission array, message industry control server and interchanger；The message industry control server connects the star-like transmission array, the interchanger simultaneously；The message industry control server, including embedded type control module and the SMS module, memory, the display module that are connected with the embedded type control module；The embedded type control module detects whether to receive the response message of mobile terminal feedback after message information is sent to mobile terminal, if it is not, then resending message information；The star-like transmission array, including a receiving terminal and multiple transmitting terminals.The present invention improves security, reliability and the real-time of message information transmission.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of Big Dipper base station and the message information based on Big Dipper base station to hand over
Mutual method.
Background technology
Big-dipper satellite alignment system is China's independent research, and round-the-clock, region is provided the user using geostationary satellite
The global position system of property, its major function are as follows：Positioning, it is quick to determine geographical position residing for target or user, to user
And authorities provide navigation information；Communication, two-way brief number can be achieved between user and user, user and central control system
Word message communication；Time service, (" time service " is i.e. daily in certain time aerogram for central control system broadcasting on schedule time service information
Number report most accurate time), while provide the user time delay correction value (" time delay " refers to loquitur to callee from speaker
Hear the time of content).Beidou satellite navigation and positioning system, do not influenceed by communication signal and space length, between terminating machine,
And the short message short message of word more than 40 can be write between terminating machine and mobile phone every time, it is very beneficial for overocean communications, emergency communication.
Beidou satellite navigation system is military, civilian dual-purpose system, and with the increase of number of users, communication bandwidth day
It is beneficial nervous, average 60s. so that advanced level user's authority in safeguards system, is limited the frequency received and sent messages of user,
An information can be sent.Be additionally, since Beidou satellite navigation system civilian Message Service have communication frequency (send at intervals of
60s) and message length (78byte) is limited and data packetloss problem, greatly limit its application.
Therefore, security, reliability and the real-time of message information transmission how are improved, is technology urgently to be resolved hurrily at present
Problem.
The content of the invention
It is existing to solve the invention provides a kind of Big Dipper base station and the message information exchange method based on Big Dipper base station
Message information transmission security is relatively low, the problem of reliability and real-time are poor.
In order to solve the above problems, the invention provides a kind of Big Dipper base station, including star-like transmission array, message industry control clothes
Business device and interchanger；The message industry control server connects the star-like transmission array, the interchanger simultaneously；Wherein：
The message industry control server, including embedded controller and be connected with the embedded controller short
T unit, memory, display；The short message apparatus, information exchange is carried out for Big Dipper message information and mobile terminal；It is described
Memory, for storing the message information for sending, receiving through the message industry control server；The display, for showing
The message information that the message industry control server is currently received or sent in advance；The embedded controller, for adaptive more
Subpackage, encoding and decoding and the transmission of message information of formatted data information, and detected after message information is sent to mobile terminal
Whether the response message of mobile terminal feedback is received, if it is not, then resending message information；
The star-like transmission array, including a receiving terminal and multiple transmitting terminals, the receiving terminal are used to receive the message
Industry control server transport, the message information that sends in advance, the transmitting terminal are used to send message information to mobile terminal.
Preferably, the model SIM900A of the SMS module.
Preferably, the model STM32F103 of the embedded type control module.
In order to solve the above problems, present invention also offers a kind of message information exchange method based on Big Dipper base station, bag
The Big Dipper base station described in any of the above-described is included, and is comprised the following steps：
Receive the first message information of the first mobile terminal transmission；
First message information described in parsing, subpackage, and obtain the essential information of first message information；
Essential information through parsing, the first message information of subpackage and first message information is subjected to data pressure
Contracting, scrambled, to form message information to be sent；
The message information to be sent is sent to the second mobile terminal；
Detect whether to receive the complete answer information that second mobile terminal feeds back, if it is not, then treating described again
The message information of transmission is sent to second mobile terminal.
Preferably, the message information to be sent is sent to the specific steps of the second mobile terminal includes：
Detect presently described star-like send and whether there is idle transmitting terminal in array, if so, then random selection one is idle
Transmitting terminal the message information to be sent is sent to the second mobile terminal；
If idle transmitting terminal is not present in presently described star-like send in array, it is current to obtain each transmitting terminal
Load, and select the minimum transmitting terminal of present load to send the message information to be sent.
Preferably in the specific steps for detecting whether to receive complete response message include：
A stochastic variable is obtained, the stochastic variable is used to produce delay；
Whether detection receives the checking data of the second mobile terminal feedback within a stipulated time, if it is not, then true
Recognize and do not receive complete answer information.
Preferably, the message numbering of the essential information including the message information, receive the message information when
Between, the latitude and longitude information of first mobile terminal.
Preferably, the message information exchange method based on Big Dipper base station also comprises the following steps：
Receive the second message information of the 3rd mobile terminal transmission；
Store second message information；
Detect whether second message information is overlength message information, sub- message situation is received if so, then differentiating；It is described
Overlength message information refers to that message length exceedes the message information of preset value；
Message response message is sent to the 3rd mobile terminal；
Judge whether second message information needs to carry out short message forwarding, if so, then passing through described in short message sending second
Message information.
Big Dipper base station provided by the invention and the message information exchange method based on Big Dipper base station, by using " transmission-should
Answer-retransmit " mechanism and the star-like transmission array including multiple transmitting terminals, improve the security, reliable of message information transmission
Property and real-time, fundamentally solve civilian messaging system communication frequency and message length be limited and data-bag lost is asked
Topic, expands application of the big-dipper satellite in civil area.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the Big Dipper base station of the specific embodiment of the invention；
Accompanying drawing 2 is the structural representation of the message industry control server of the specific embodiment of the invention；
Accompanying drawing 3 is the structural representation of the star-like transmission array of the specific embodiment of the invention；
Accompanying drawing 4 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in message send
Flow chart；
Accompanying drawing 5 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in message receive
Flow chart；
Accompanying drawing 6 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in handheld terminal
Send the flow chart of message information；
Accompanying drawing 7 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in message information read
The flow chart of reading.
Embodiment
Message information exchange method to Big Dipper base station provided by the invention and based on Big Dipper base station below in conjunction with the accompanying drawings
Embodiment elaborates.
Present embodiment provides a kind of Big Dipper base station, and accompanying drawing 1 is the Big Dipper base station of the specific embodiment of the invention
Structural representation.As shown in figure 1, the Big Dipper base station that present embodiment provides includes star-like transmission array, message industry control
Server and interchanger, the message industry control server connect the star-like transmission array, the interchanger simultaneously.In this tool
In body embodiment, the star-like transmission array, for Big Dipper short message information (including overlength message information and short message letter
Breath) send and receive；The message industry control server, for the parsing of overlength Big Dipper message information and connecing for short message information
Receive；The interchanger, while the message industry control server and internet are connected, for will be deposited in the message industry control server
The message information of storage passes through the Internet transmission to one or more mobile terminal.In this embodiment, the overlength
Big Dipper message refers to that message information length is more than 78 bytes and less than the message information of 312 bytes, the short message information
Refer to that message information length is less than or equal to the message information of 78 bytes.Overlength message information in present embodiment with
Short message information is the comparatively length that those skilled in the art can also set overlength message information according to being actually needed
Degree.
Accompanying drawing 2 is the structural representation of the message industry control server of the specific embodiment of the invention.It is as shown in Fig. 2 described
Message industry control server, including embedded controller 111 and the short message apparatus that is connected with the embedded controller 111
113rd, memory 112, display 114.The short message apparatus 113, enter row information for Big Dipper message information and mobile terminal and hand over
Mutually.Optionally, the model SIM900A of the short message apparatus.Because SIM900A short message apparatus is connected using serial ports,
It is easy to connect and cheap.The memory 112, for storing the message letter for sending, receiving through message industry control server
Breath.The display 114, for showing the message information of transmission that the message industry control server is currently received or pre-.
The embedded controller 111, for the subpackage, encoding and decoding and the transmission of message information of adaptive multi-format data information,
And detect whether to receive the response message of mobile terminal feedback after message information is sent to mobile terminal, if it is not, then again
Send message information.Because the information channel of the Big Dipper employs the agreement of no checking, sender can not learn recipient whether into
Work(receives data.In order to ensure the reliability of communication, the Big Dipper base station that present embodiment provides is entered to Beidou communication agreement
Following improvement is gone：After sender sends message, a stochastic variable is obtained from the message industry control server and is used to produce
Delay, continue to repeat to send the message if not receiving the checking data that recipient sends in defined time span
Checking datagram of the information until having successfully received recipient, that is, form " transmission-response-re-transmission " mechanism.Wherein, the random change
Amount is the random number between one 0~300 obtained using current time seed as parameter.In this embodiment, institute
Smart mobile phone, tablet personal computer, notebook computer etc. can be but not limited to by stating mobile terminal, and user can be according to the needs of oneself
Selected.Optionally, the model STM32F103 of the embedded controller.The embedded Control mould of STM32F103 models
Block is a kind of universal embedded device, and use is easy to operate, and its pin meets the Big Dipper of present embodiment enough
The demand of base station.For the ease of the transmission of data-signal, it is preferred that the message industry control server also includes data transmission device
115；The data transmission module 115 connects the embedded controller 111, for by the report in the message industry control server
Literary information passes through Serial Port Transmission to the star-like transmission array of the Big Dipper.
Accompanying drawing 3 is the structural representation of the star-like transmission array of the specific embodiment of the invention.Due to existing Big Dipper base
Standing only has a transmitting terminal, and after using above-mentioned " transmission-response-re-transmission " mechanism, the reliability of system communication is carried
Height, but to the serious burden brought of communication system of the Big Dipper, in particular with the increase of each terminal system quantity, control centre
Communications burden increasingly increase, the success rate that each terminal data is sent also declines to a great extent, and has had a strong impact on the normal work of system.
To solve this problem, present embodiment provides a kind of star-like transmission array as shown in Figure 3.The star-like transmission battle array
Row, including a receiving terminal 32 and multiple transmitting terminals 31, the receiving terminal 32 be used to receiving the message industry control server transport,
The message information sent in advance, the transmitting terminal 31 are used to send message information to mobile terminal.The receiving terminal 32 and multiple hairs
Sending end 31 is connected with serial server 33.Present embodiment is by setting multiple transmitting terminals, when the Big Dipper base station needs
When sending message information, according to load balancing algorithm an idle transmitting terminal can be selected to complete from multiple transmitting terminals
The transmission of message information；When all transmitting terminals are all carrying out transmission (idle transmitting terminal is not present) of message information,
Then according to minimum principle is loaded, the minimum transmitting terminal of selection load sends the message information.Using the north of star-like transmission array
Struggle against satellite, and after coordinating load balancing algorithm, the throughput of data improves, and the reaction speed of Big Dipper base station is accelerated, and also improves and adopts
Collect the Consumer's Experience of equipment.
Present embodiment additionally provides a kind of message information exchange method based on Big Dipper base station, including any of the above-described
Big Dipper base station described in.Accompanying drawing 4 is in the message information exchange method based on Big Dipper base station of the specific embodiment of the invention
The flow chart that message is sent.
As shown in figure 4, the message information exchange method based on Big Dipper base station that present embodiment provides is including as follows
Step：
Step 11, receive the first message information that the first mobile terminal is sent；
Step 12, parsing, the first message information described in subpackage, and obtain the essential information of first message information；
Step 13, the essential information through parsing, the first message information of subpackage and first message information entered
Row data compression, scrambled, to form message information to be sent；
Step 14, the message information to be sent sent to the second mobile terminal；
Step 15, detect whether to receive the complete answer information of the second mobile terminal feedback, if it is not, then again will
The message information to be sent is sent to second mobile terminal.So, completed by " transmission-response-re-transmission " mechanism
The transmission of message information, it is ensured that security, reliability and the real-time that message information is sent.
In order to avoid bringing serious burden to the communication system of the Big Dipper, the efficiency that message information is sent is improved, it is preferred that
The message information to be sent, which is sent to the specific steps of the second mobile terminal, to be included：
Step 141, detection presently described star-like send whether there is idle transmitting terminal in array, if so, then random choosing
An idle transmitting terminal is selected to send the message information to be sent to the second mobile terminal；
If idle transmitting terminal is not present in step 142, presently described star-like send in array, each transmission is obtained
Current load is held, and selects the minimum transmitting terminal of load to send the message information to be sent.Calculated using load balance
Method, the throughput of data is improved, enhance the message information efficiency of transmission of Big Dipper base station.
In order to further improve the reliability of message information transmission, it is preferred that detect whether to receive complete response message
Specific steps include：
Step 151, a stochastic variable is obtained, the stochastic variable is used to produce delay；
Whether step 152, detection receive the checking data of the second mobile terminal feedback within a stipulated time, if
It is no, then confirm not receiving complete answer information.
Specifically, the stochastic variable for producing delay is one 0~300 obtained using current time seed as parameter
Random value, be delayed by the use of the random value as timer, after timer, which is delayed, to be reached, if not receiving the corresponding report
The response message of the message numbering of literary information, then it is assumed that send failure, retransmitted (i.e. again to the mobile terminal send and
Previous identical message information), and detect again in fixed response time after arrival, if receive the second mobile terminal feedback
The response message；After repeating aforesaid operations three times, (second movement is not all received three times if still failed
The response message of the message numbering of the correspondence message information of terminal feedback), then user is reminded, then will send the report of failure
Literary information writes the memory 112.
In general, second byte of wall scroll message is the message numbering of current message information, and message numbering is by being
What system was read from memory, initial value 0, after often sending a short message information or overlength message information, message numbering adds
1, and memory is write to 255 remainders, while by message numbering, read when being sent for next time.The main function of the message numbering,
It is after other side receives message, to be responded, during response, message numbering is consistent, judges to send successfully and unsuccessfully for transmitting terminal.
Table 1 below gives the example of the corresponding relation on message response information and message numbering.
The corresponding relation of the message response information of table 1 and message numbering
| Message text | Flag byte | Message numbering | Content |
| Common message is sent: | 00XX XXXX | 0000 0001 | Text message |
| Common message response： | 00XX XXXX | 0000 0001 | |
| Overlength message sends 1： | 01XX 0010 | 0000 0010 | First text message |
| Overlength message sends 2： | 01XX 0110 | 0000 0010 | Article 2 text message |
| Overlength message sends 3： | 01XX 1010 | 0000 0010 | Article 3 text message |
| Overlength message response information： | 01XX XX10 | 0000 0010 | 0000 0111 |
It should be noted that message response information is to carry out response confirmation, institute to the message information of corresponding message numbering
Must be consistent with message numbering.High four of the 3rd byte of wherein overlength message response information is defaulted as 0, low 4 difference tables
Show the reception state of 4 message informations, if 0, then do not receive, received for 1 expressions, such as 0,000 0111, then it represents that three
Bar all receives；Such as it is 0,000 0011, then it represents that the Article 3 message of overlength message does not receive.
Preferably, the message numbering of the essential information including the message information, receive the message information when
Between, the latitude and longitude information of first mobile terminal.
Accompanying drawing 5 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in message receive
Flow chart.In order to improve the efficiency that Big Dipper base station interacts with mobile terminal message information, it is preferred that as shown in figure 5, described be based on
The message information exchange method of Big Dipper base station also comprises the following steps：
Step 21, receive the second message information that the 3rd mobile terminal is sent.
Step 22, storage second message information.
Whether step 23, detection second message information are overlength message information, and sub- message letter is received if so, then differentiating
Breath situation.
In general, the first character in the common message text information of wall scroll is saved in flag byte, and second byte is
The message numbering of current message information, remaining as message content, therefore, the length of message content is up to 78-2, i.e., 76, such as
Retribution text content-length is more than 76 bytes, as overlength message.Table 2 gives message text information pass corresponding with byte
System.As shown in table 2 below, if detecting, second message information is overlength message information, and second message information may
Comprising one, two, three or four strip message informations, it is necessary to judge the situation of every strip message information, in judgement
Appearance includes type of message, message source, message current sequence number etc..
The corresponding relation of the message text information of table 2 and byte
For example, 01011011, that is, represent that the sub- message information is overlength message, be through the Big Dipper by mobile phone short message
Type array is sent, and the message total number is 4 message informations, and current message is the 3rd article of message information.
Step 24, to the 3rd mobile terminal send message response message.
Step 25, judge whether second message information needs to carry out short message forwarding, if so, then passing through short message sending institute
State the second message information.
By sending response message to the 3rd mobile terminal, the reliability and safety of message information transmission are further increased
Property.
The Big Dipper base station that present embodiment provides, can be industry control platform mode or hand-held, but
It is that, no matter using which kind of mode, the mode of its message information interaction is identical.Accompanying drawing 6 is the specific embodiment of the invention
Handheld terminal sends the flow chart of message information in message information exchange method based on Big Dipper base station.It is as shown in fig. 6, hand-held
Formula terminal device message information sending module also uses " transmission-response-re-transmission " mechanism, and the equipment is by message data information
After scrambled, central station is sent back through Big Dipper positioning and communicating module.Specifically, as shown in fig. 6, this is specific
The message information exchange method based on Big Dipper base station that embodiment provides also comprises the following steps：
Step 31, the 3rd message information for receiving user's input；
Step 32, the relevant information for obtaining the 3rd message information, the relevant information include Big Dipper device numbering, when
The latitude and longitude information that preceding time at moment, handheld terminal are currently located；
Step 33, the 3rd message information and the relevant information be compressed, is encrypted, coded treatment, formed pre-
The message information of transmission；
Step 34, the message information to the 4th mobile terminal transmission pre- transmission；
Step 35, detect whether to receive the response message of the 4th mobile terminal feedback, if it is not, then again by the pre- hair
The message information sent is sent to the 4th mobile terminal.
Accompanying drawing 7 be the specific embodiment of the invention the message information exchange method based on Big Dipper base station in message information read
The flow chart of reading.As shown in fig. 7, the message information exchange method based on Big Dipper base station that present embodiment provides also includes
Following steps：
Whether step 41, detection message information to be read are overlength message informations, if so, then reading and showing first
Sub- message information；If detecting the non-super long message information of message information to be read, complete message information is shown；
Whether step 42, the detection message information are read and are terminated, if it is not, then reading next strip message information.
The Big Dipper base station that present embodiment provides and the message information exchange method based on Big Dipper base station, by using
" transmission-response-re-transmission " mechanism and the star-like transmission array including multiple transmitting terminals, improve the safety of message information transmission
Property, reliability and real-time, fundamentally solve that civilian messaging system communication frequency and message length be limited and packet
The problem of loss, expand application of the big-dipper satellite in civil area.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
1. a kind of Big Dipper base station, it is characterised in that including star-like transmission array, message industry control server and interchanger；It is described
Message industry control server connects the star-like transmission array, the interchanger simultaneously；Wherein：
The message industry control server, including embedded controller and be connected with the embedded controller short message dress
Put, memory, display；The short message apparatus, information exchange is carried out for Big Dipper message information and mobile terminal；The storage
Device, for storing the message information for sending, receiving through the message industry control server；The display, it is described for showing
The message information that message industry control server is currently received or sent in advance；The embedded controller, for adaptive multi-format
Subpackage, encoding and decoding and the transmission of message information of data message, and detected whether after message information is sent to mobile terminal
The response message of mobile terminal feedback is received, if it is not, then resending message information；
The star-like transmission array, including a receiving terminal and multiple transmitting terminals, the receiving terminal are used to receive the message industry control
Server transport, the message information that sends in advance, the transmitting terminal are used to send message information to mobile terminal.
2. Big Dipper base station according to claim 1, it is characterised in that the model SIM900A of the SMS module.
3. Big Dipper base station according to claim 1, it is characterised in that the model of the embedded type control module
STM32F103。
4. a kind of message information exchange method based on Big Dipper base station, it is characterised in that including such as any one of claim 1-3 institutes
The Big Dipper base station stated, and comprise the following steps：
Receive the first message information of the first mobile terminal transmission；
First message information described in parsing, subpackage, and obtain the essential information of first message information；
By the essential information through parsing, the first message information of subpackage and first message information carry out data compression,
Scrambled, to form message information to be sent；
The message information to be sent is sent to the second mobile terminal；
Detect whether to receive the complete answer information that second mobile terminal feeds back, if it is not, then again will be described to be sent
Message information send to second mobile terminal.
5. the message information exchange method according to claim 4 based on Big Dipper base station, it is characterised in that
The message information to be sent, which is sent to the specific steps of the second mobile terminal, to be included：
Detect presently described star-like send and whether there is idle transmitting terminal in array, if so, the then idle hair of random selection one
Sending end sends the message information to be sent to the second mobile terminal；
If idle transmitting terminal is not present in presently described star-like send in array, current negative of each transmitting terminal is obtained
Carry, and select the minimum transmitting terminal of present load to send the message information to be sent.
6. the message information exchange method according to claim 4 based on Big Dipper base station, it is characterised in that
The specific steps for detecting whether to receive complete response message include：
A stochastic variable is obtained, the stochastic variable is used to produce delay；
Whether detection receives the checking data of the second mobile terminal feedback within a stipulated time, if it is not, then confirming not
Receive complete answer information.
7. the message information exchange method according to claim 4 based on Big Dipper base station, it is characterised in that
Message numbering of the essential information including the message information, the time for receiving the message information, described first
The latitude and longitude information of mobile terminal.
8. the message information exchange method according to claim 4 based on Big Dipper base station, it is characterised in that
The message information exchange method based on Big Dipper base station also comprises the following steps：
Receive the second message information of the 3rd mobile terminal transmission；
Store second message information；
Detect whether second message information is overlength message information, sub- message information situation is received if so, then differentiating；It is described
Overlength message information refers to that message length exceedes the message information of preset value；
Message response message is sent to the 3rd mobile terminal；
Judge whether second message information needs to carry out short message forwarding, if so, then passing through the second message described in short message sending
Information.
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| CN109788065B (en) * | 2019-01-30 | 2021-09-24 | 广东海聊科技有限公司 | Off-line message transmission method and off-line message transmission device based on Beidou system |
| CN111404649A (en) * | 2020-03-05 | 2020-07-10 | 中国科学院重庆绿色智能技术研究院 | Beidou message feedback and retransmission method and system supporting multiple sending ends |
| CN112152697A (en) * | 2020-07-29 | 2020-12-29 | 国家电网有限公司 | Power business data coding transmission method, system and storage medium |
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| WO2023011379A1 (en) * | 2021-07-31 | 2023-02-09 | 华为技术有限公司 | Inbound transmission control method and system in beidou communication system, and related apparatus |
| CN114488204A (en) * | 2022-04-06 | 2022-05-13 | 长沙金维信息技术有限公司 | Beidou RDSS content-based state anomaly monitoring method and system and storage medium |
| CN114488204B (en) * | 2022-04-06 | 2022-06-21 | 长沙金维信息技术有限公司 | Beidou RDSS content-based state anomaly monitoring method and system and storage medium |
| CN115396951A (en) * | 2022-10-31 | 2022-11-25 | 电科疆泰(深圳)科技发展有限公司 | Message communication method, device, terminal equipment and storage medium |
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