CN106936471A - Receive method, system and the reception radio station of base station differential data - Google Patents
Receive method, system and the reception radio station of base station differential data Download PDFInfo
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- CN106936471A CN106936471A CN201710310045.2A CN201710310045A CN106936471A CN 106936471 A CN106936471 A CN 106936471A CN 201710310045 A CN201710310045 A CN 201710310045A CN 106936471 A CN106936471 A CN 106936471A
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- identification code
- frame head
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
Abstract
The present invention discloses a kind of method for receiving base station differential data, system and receives radio station.The method comprises the following steps：Receive in radio station and prestore multiple frequencies and identification code, receive data and record the time for receiving data using a frequency in the multiple frequency as frequency is received；Obtain the frame head of data, when frame head is correct, identification code is obtained from the data, when the identification code is matched with the identification code for prestoring, differential data is obtained from data, when the identification code is mismatched with the identification code for prestoring, data are continued under the frequency and frame head and identification code is judged until the time for receiving data switches frequency more than Preset Time and receives data or frame head again correctly and identification code matching；When frame head is incorrect, data is continued under the frequency and judges that frequency receives data to frame head again or frame head is correct up to the time of reception data switches more than Preset Time, thus, it is ensured that receiving radio station receives correct differential data, it is time saving and energy saving.
Description
Technical field
Technical field of satellite navigation of the present invention, more particularly to receive method, system and the reception electricity of base station differential data
Platform.
Background technology
Fig. 1 is referred to, in precision agriculture field, the method that movement station receives base station differential data is as follows：
First, base station 1 is sent out message by transmitting station 11 with tranmitting frequency f1, and the message includes difference number
According to；
Then, the reception radio station 21 of movement station 2 (having multiple movement stations in a piece of operation area, distinguish with 1 to n) (receives electricity
The quantity of platform is equal with movement station quantity, is also distinguished with 1 to n) message is received, differential data is obtained from the message, then, will
Differential data transmission to peasant household receiver 22 (namely mobile station receiver 22, the quantity of receiver with receive radio station quantity
It is equal, also distinguished with 1 to n)；
Finally, the receiver 22 of peasant household obtains the position of tractor based on differential data, and controller is according to the position control
Tractor is carrying out farming.
In such scheme, the receiver 22 of peasant household nearby there may be another base station 3, and the base station 3 is by transmitting
Radio station 31 sends message with tranmitting frequency f2.If f1 and f2 are same or similar for tranmitting frequency, receiving radio station 21 can also receive
The differential data of base station 3, causes the receiver 22 of peasant household according to benchmark the differential data transmission to the receiver 22 of peasant household
3 differential data of standing obtains the position of tractor, and controller is according to the position control tractor carrying out farming.Due to difference
Divided data is not from base station 1, so, the control instruction produced according to the differential data will be caused tractor to go out by controller
The problems such as now deviateing programme path.In order to ensure tractor receives correct differential data, it is necessary to change transmitting station manually
11 tranmitting frequency and the receives frequency in radio station 21 is received to cause to receive the message that radio station 21 receives transmitting station 11, but,
A piece of cultivating has tens at least in region, at most up to a hundred mobile station receivers 22, every receiver is all connected with reception
Radio station 21, changes the frequency in so many reception radio station manually, and time-consuming effort influences operating efficiency.
In addition, in Driving Test/drive training field, the receiver on vehicle needs the differential data for receiving base station with reality
The positioning of existing vehicle, there is also and disturbed by other base stations and need to change the tranmitting frequency of transmitting station and reception radio station manually
Receives frequency problem.
The content of the invention
The problem that the present invention is solved is how to ensure to receive the problem that radio station receives correct differential data.
To solve the above problems, the present invention provides a kind of reception radio station, and multiple frequencies are prestored in the reception radio station, with
A frequency in the multiple frequency receives data as frequency is received；The frame head of data is obtained, when frame head is correct, from connecing
Differential data is obtained in the data of receipts；When frame head is incorrect, switching frequency receives data.
In a kind of scheme, the reception radio station includes memory, receiver module and processor, wherein, the memory
Inside prestore multiple frequencies；The receiver module receives data, transmission using a frequency in multiple frequencies as frequency is received
Data are to the processor；The processor obtains the frame head of data, controls the receiver module persistently to connect when frame head is correct
Data are received, differential data is obtained from the data for receiving；When frame head is incorrect, switching command is produced；The receiver module is also
Data are received based on switching command switching frequency.
The present invention discloses another reception radio station, multiple frequencies and identification code is prestored in the reception radio station, with described
A frequency in multiple frequencies receives data as frequency is received；The frame head of data is obtained, when frame head is correct, from what is received
Identification code is obtained in data, when the identification code is matched with the identification code for prestoring, differential data is obtained from the data, at this
When identification code is mismatched with the identification code for prestoring, switching frequency receives data；When frame head is incorrect, switching frequency receives number
According to.
In a kind of scheme, multiple identification codes are prestored in the reception radio station, it is described in the identification code and the knowledge for prestoring
When other code is mismatched, switching frequency receives data to be included：When the identification code for receiving is mismatched with the identification code for prestoring,
Change identification code to be judged with the identification code for receiving, until the identification code for receiving and the identification code for prestoring
Matching or the identification code for receiving mismatch switching frequency and receive data with all identification codes for prestoring.
In a kind of scheme, the reception radio station includes memory, receiver module and processor, wherein, the memory
Inside prestore identification code and multiple frequencies；The receiver module connects using a frequency in the multiple frequency as frequency is received
Receive data；The processor obtains the frame head of data, when frame head is correct, identification code is obtained from the data for receiving, in the knowledge
When other code is matched with the identification code for prestoring, the receiver module is controlled persistently to receive data and difference number is obtained from the data
According to, when the identification code is mismatched with the identification code for prestoring, the first switching command of generation；When frame head is incorrect, second is produced
Switching command；The receiver module also receives data based on the first switching command or the second switching command switching frequency.
The present invention discloses another reception radio station, multiple frequencies is prestored in the reception radio station, with the multiple frequency
In a frequency as receive frequency receive data and record receive data time；The frame head of data is obtained, in frame head just
When really, differential data is obtained from the data；When frame head is incorrect, data is continued under the frequency and continues record
The time of data is received, frame head is judged after receiving the data until the time for receiving data switches frequency more than Preset Time
Again data are received or frame head is correct.
In a kind of scheme, the reception radio station includes memory, timer, receiver module and processor, wherein, it is described
Multiple frequencies are prestored in memory；The receiver module is received using a frequency in the multiple frequency as frequency is received
Data；The timer since receiver module receive data when timing；The processor obtains the frame head of data, in frame
When head is correct, control the receiver module persistently to receive data, differential data is obtained from the data；It is incorrect in frame head
When, control the receiver module that data are continued under the frequency and control timer to continue to record the time for receiving data,
Judge frame head up to frame head is correct or receives the time of data more than Preset Time generation switching command after receiving the data
And control the timer to reset.The receiver module also receives data again based on switching command switching frequency.
The present invention discloses another reception radio station, multiple frequencies and identification code is prestored in the reception radio station, with described
A frequency in multiple frequencies receives data and records the time for receiving data as frequency is received；The frame head of data is obtained,
When frame head is correct, identification code is obtained from the data, when identification code is matched with the identification code for prestoring, from the data
Differential data is obtained, when identification code is mismatched with the identification code for prestoring, data is continued under the frequency and record is received
The time of data, continuation judges frame head and identification code until the time for receiving data switches frequency more than Preset Time receives number
According to or frame head is correct and identification code is matched；When frame head is incorrect, data is continued under the frequency and record receives number
According to time, judge whether frame head correct until the time for receiving data switches frequency and receive data again more than Preset Time
Or frame head is correct.
In a kind of scheme, multiple identification codes are prestored in the reception radio station, it is described in identification code and the identification for prestoring
When code is mismatched, the time that data and record reception data are continued under the frequency includes：The identification code with prestore
When one identification code is mismatched, change identification code and judged with the identification code, until the identification code that receives with prestore
The matching of one identification code, or, when the identification code that this is received is mismatched with all identification codes for prestoring, under the frequency after
Data are received in continued access and record receives the time of data.
In a kind of scheme, the reception radio station includes receiver module, timer, memory and processor；Wherein, it is described
Multiple frequencies and identification code are prestored in memory；The receiver module is using a frequency in the multiple frequency as reception
Frequency receives data, the data that transmission is received to the processor；The timer since receiver module receive data when count
When, transmission timing result to processor；The processor obtains the frame head of data, when frame head is correct, is obtained from the data
Identification code, when identification code match with the identification code for prestoring, the control receiver module persistently receives data and from the number
According to middle acquisition differential data, when identification code is mismatched with the identification code for prestoring, control receiver module continues to connect under the frequency
Receive data and control timer continue to record the time for receiving data, continuation judge frame head and identification code until reception data when
Between when more than Preset Time producing the first switching command and controlling that the timer resets or frame head is correct and identification code is matched
Control receiver module persistently receives data；When frame head is incorrect, control receiver module continued under the frequency data and
Control timer continues to record the time for receiving data, judges frame head up to frame head is correct or receives the time of data more than pre-
If the time and produce the second switching command and control timer reset；The receiver module is also based on the first switching command or the
Two switching commands switching frequency receives data again.
The present invention discloses a kind of system for receiving base station differential data, including base station and multiple movement stations, the base
Quasi- station includes transmitting station, and the transmitting station is sent out message, and the message includes differential data；Each movement station includes connecing
Radio station is received, the reception radio station is the reception radio station described in foregoing any one.
In a kind of scheme, the transmitting station internal memory contains multiple frequencies, and switches frequency based on switching command.
In a kind of scheme, the system includes many reception radio station, the identification code that all reception radio station prestore
Identical, the identification code is corresponding with many reception radio station by a transmitting station.
The present invention discloses a kind of method for receiving base station differential data, and the method comprises the following steps：Prestore multiple frequencies
Point, data are received using a frequency in the multiple frequency as frequency is received；The frame head of data is obtained, it is correct in frame head
When, obtain differential data from the data；When frame head is incorrect, switching frequency receives data.
The present invention discloses another method for receiving base station differential data, and the method comprises the following steps：Prestore multiple
Frequency and identification code, data are received using a frequency in the multiple frequency as frequency is received；The frame head of data is obtained,
When frame head is correct, identification code is obtained from the data for receiving, when the identification code is matched with the identification code for prestoring, from the data
Middle acquisition differential data, mismatches in the identification code with the identification code for prestoring, and switching frequency receives data；It is incorrect in frame head
When, switching frequency receives data.
In a kind of scheme, the identification code for prestoring has multiple；It is described in the identification code and the identification code for prestoring not
Timing, switching frequency receives data to be included：When the identification code for receiving is mismatched with the identification code for prestoring, identification is changed
Code is judged with the identification code for receiving, until the identification code for receiving is matched or described with the identification code for prestoring
The identification code for receiving mismatches switching frequency and receives data with all identification codes for prestoring.
The present invention discloses another method for receiving base station differential data, and the method comprises the following steps：Prestore multiple
Frequency, receives data and records the time for receiving data using a frequency in the multiple frequency as frequency is received；Obtain
The frame head of data, when frame head is correct, differential data is obtained from the data for receiving；When frame head is incorrect, under the frequency
Continue to data and continue the time that record receives data, frame head is judged until the time for receiving data is more than after receiving data
Preset Time and switch frequency receive data or frame head it is correct.
The present invention discloses another method for receiving base station differential data, and the method comprises the following steps：Prestore multiple
Frequency and identification code, using a frequency in the multiple frequency as receive frequency receive data and record receive data when
Between；The frame head of data is obtained, when frame head is correct, identification code is obtained from the data, in the identification code and the identification for prestoring
During code matching, differential data is obtained from the data, when the identification code is mismatched with the identification code for prestoring, under the frequency
Continue to data and continue to record the time for receiving data, frame head and identification code are judged until receiving data after receiving data
Time switch frequency more than Preset Time and receive that data or frame head be correct and identification code matching；When frame head is incorrect,
Data are received under the frequency and continues to record the time of the reception data, frame head is judged after receiving the data until receiving
The time of data receives data more than Preset Time switching frequency or frame head is correct.
In a kind of scheme, the identification code for prestoring has multiple, described to be mismatched with the identification code for prestoring in identification code
When, the time that data and record reception data are continued under the frequency includes：In the identification code and the identification for prestoring
When code is mismatched, change identification code and judged with the identification code, until the identification code for receiving and the identification for prestoring
Code matching, or, when the identification code that this is received is mismatched with all identification codes for prestoring, number is continued under the frequency
According to and record receive data time.
Compared with prior art, the present invention has advantages below：
1st, whether the present invention is correct by judging frame head, when frame head is correct, obtains differential data；It is incorrect in frame head
When, switching frequency receives data, so, it is ensured that receives radio station and receives correct differential data, and then, it is ensured that positioning precision,
In addition, when frame head is incorrect, switching frequency receives data and judges that frame head is correct up to frame head, in this way, if
There is interference near transmitting station, then, the frequency of transmitting station can be changed, afterwards, receive radio station and cause this by switching frequency
The frequency for receiving radio station is consistent with the frequency of transmitting station, and reception is may be such that without the frequency for changing every reception radio station manually
Radio station receives the differential data that corresponding transmitting station sends, save trouble and labor.
2nd, reception radio station of the invention not only judges frame head, also judges to receive the time of data, when starting to receive data
Start recording receives the time of data, if frame head is incorrect, data is continued under the frequency and judges to receive data
Whether the time is more than Preset Time, frequency is then switched if greater than Preset Time and receives data and reclocking, if less than pre-
If the time then continues in the case where frequency is changed and continues timing, until finding correct frame head, so, it is to avoid some occasions
Under, although transmitting station is corresponding with radio station is received, but factor causes that receiving radio station connects because signal transmission is unstable etc.
The incorrect problem of data frame head for receiving, further, it is ensured that transmitting station and the corresponding relation for receiving radio station, and then, really
Positioning precision is protected.
3rd, because the present invention receives multiple frequencies that prestored in radio station, if there is another transmitting electricity near transmitting station
Platform, the transmitting station then, because frequency is correct, then receives electricity with one of multiple frequencies and the identical agreement transmission data of prestoring
Platform can also receive the differential data.In order to avoid this problem, the present invention receives radio station and not only judges frame head, correct in frame head
When, also judge whether identification code matches with the identification code for prestoring, if it does, then, receiving differential data is and transmitting station
The differential data of corresponding transmitting station transmitting, if mismatched, switching frequency receives data again, so, by increasing
Identification code this Rule of judgment further enhances the corresponding relation for receiving radio station and transmitting station, and then ensures positioning precision.
4th, the present invention is receiving prestored in radio station multiple frequencies and identification code, the time of and reception data incorrect in frame head
Switch frequency in the case of more than Preset Time and receive and data and continue to judge frame head, or, frame head correctly but identification code not
Switch frequency in the case of matching to receive data and continue to judge frame head and identification code, thus, it is ensured that the differential data for receiving
It is the differential data of transmitting station transmitting corresponding with the reception radio station, and then, it is ensured that positioning precision；Furthermore, due to transmitting
Multiple frequencies are prestored in radio station, another transmitting station near transmitting station, the transmitting station is with multiple frequencies
When sending data, can ensure that transmitting station and receive the corresponding relation in radio station, moreover it is possible to by switching command so that transmitting station is cut
The frequency differed with the transmitting station frequency of foregoing generation interference is shifted to, then, receive radio station is made by automatic switchover frequency
Its frequency is consistent with the tranmitting frequency of transmitting station, without manual every frequency in reception radio station of change, save trouble and labor.
Brief description of the drawings
Fig. 1 is the schematic diagram that base station and movement station communicate in the prior art；
Fig. 2 is the flow chart of the method first embodiment that the present invention receives base station differential data；
Fig. 3 is the flow chart of the method second embodiment that the present invention receives base station differential data.
Specific embodiment
To describe technology contents of the invention, structural feature, institute's reached purpose and effect in detail, with reference to implementation method
And coordinate accompanying drawing to be described in detail.
Fig. 2 is referred to, the method first embodiment that the present invention receives differential data comprises the following steps：
S21, base station are sent out message by transmitting station, and the message includes differential data and frame head；
In this step, how to send message and belong to prior art, repeat no more.
S22, reception prestore multiple frequencies in radio station, are connect using a frequency in the multiple frequency as frequency is received
Receive data and record the time for receiving data, obtain the frame head of data (namely message), judge whether the frame head is correct,
When frame head is correct, the data of reception are the messages that transmitting station corresponding with the reception radio station sends, and difference is obtained from message
Data simultaneously continue to receive data；When frame head is incorrect, data is continued under the frequency and judges frame head until receiving data
Time switch frequency more than Preset Time to receive data or frame head again correct, thus, receiving the frequency that radio station prestores
Frequency corresponding with the frequency of transmitting station is found in point.
In the step, frequency can be stored in the memory for receiving radio station in the form of table, as shown in Table 1
Table one
| Frequency | Frequency |
| 1 | f1 |
| 2 | f2 |
| 3 | f3 |
| n | fn |
Described in detail with reference to a pair steps of Fig. 2 and above-mentioned table as follows：Radio station is received first to be connect using frequency 1 as frequency is received
Receive data and obtain data by the time of timer start recording reception data, then, parsing data and analytically in result
Frame head.Judge whether frame head is identical with the frame head that communication protocol is arranged, if identical, then, frame head is correct, from the message
Middle acquisition differential data simultaneously persistently receives data with frequency 1；When frame head is incorrect, data are continued to frequency 1, meanwhile,
Timer continues timing, after receiving the data, judges whether the frame head of the data of reception is correct, when frame head is correct, from report
Differential data is obtained in text and data are persistently received with the frequency 1, meanwhile, timer is reset；If frame head is still incorrect,
Data are continued to frequency 1 and continues timing, frame head (in deterministic process, continuing timing) is judged after receiving data, if
Frame head is still incorrect and receives the time of data more than Preset Time, and timer resets, and switching to frequency 2 from frequency 1 receives number
According to.
After switching to frequency 2 from frequency 1, receive data and restart timing using frequency 2 as frequency is received, judge number
According to frame head it is whether correct, when frame head is correct, differential data is obtained from the message and timer is reset, with the frequency 2
Persistently receive differential data；If frame head or incorrect, data are still received with frequency 2 and continues timing, judge the frame of data
Head (in deterministic process, continues timing), if frame head is correct, transmission differential data is continued to mobile station receiver with frequency 2
Receive data and reset timer；If frame head is still incorrect, continues timing and judge whether frame head is correct, until receiving
The time of data is more than Preset Time, and frequency 3 is switched to from frequency 2, and data are received using frequency 3 as frequency is received.In frequency 3
The process that lower treatment receives data is identical with the process for receiving data in the 2 times treatment of frequency 1 and frequency, repeats no more.In a word, exist
In present embodiment, frame head it is incorrect and receive data time be more than Preset Time when, switching frequency receive data and after
It is continuous to judge frame head until frame head correctly or has switched n frequency in table one, if n=10, switch 10 frequencies, from
And, the reception radio station frequency corresponding with the tranmitting frequency of transmitting station is found in the frequency for prestoring.
Incorporated by reference to Fig. 2 and Fig. 1, in sum, when present embodiment is by judging whether frame head is correct and reception data
Between it is whether whether correct to determine the differential data that receives more than Preset Time, thus, it is ensured that the reception radio station of movement station 2
21 can receive correct differential data, and then, it is ensured that the positioning precision of mobile station receiver 22.
Used as the further scheme of aforementioned schemes, the transmitting station internal memory contains multiple frequencies, and the transmitting station is based on
Switching command switches frequency, and data are sent out with the frequency after switching.Switching command is receiving the differential data that radio station receives
When abnormal, operator can be produced by pressing the button of transmitting station, or, receiving differential data not just radio station is received
Produced by software based on the feedback signal for receiving radio station when often, do not enumerated.Those skilled in the art can judge
Differential data is abnormal in what situations, such as can be that tractor deviates the situation of projected route, or receives radio station
Situations such as differential data of reception is discontinuously or differential data postpones.In this way, even if nearby there is frequency phase
During the transmitting station 31 of near or another base station 3 of identical, the frequency of transmitting station 11 is changed by switching command and is caused
Transmitting station 11 avoids the frequency of transmitting station 31, and then, reception radio station 21 is by automatic switchover frequency in the frequency for prestoring
Find the corresponding frequency of the frequency after being changed with transmitting station 11 and persistently receive data, electricity is received without manual change every
The frequency of platform, save trouble and labor.
Refer to Fig. 3 and combine Fig. 1, in practical application scene, it is understood that there may be following situation：Receive radio station 21 corresponding
Transmitting station is 11, but, it is pre- with receiver that the transmitting station 31 in adjacent operating area is sent out the frequency of message
A frequency (such as frequency 3) and agreement in the multiple frequencies deposited is identical, in such cases, if still using the first embodiment party
Method described in formula, can cause to receive the differential data that radio station 21 receives the transmission of transmitting station 31.In order to avoid with automatic
The reception radio station for switching frequency function locks onto the problem of not corresponding transmitting station 11, and present embodiment increases identification code and judges
Step determines whether to receive correct differential data.The second embodiment is described in detail as follows：
S31, base station are sent out message by transmitting station, and the message includes differential data, identification code and frame head,；
The identification code is used to recognize transmitting station, can be the device number of reference receiver or transmitting station,
Can be encoded by reference receiver manufacturer self-defining, this coding is made up of numeral, letter or numeral and letter, always
It, as long as the purpose of identification base station can be played.The constituted mode of identification code has various, numerous to list herein.Identification
Code there may be in reference receiver, and transmitting station is sent jointly to differential data；Can also only exist in transmitting station.
S32, receive identification code and multiple frequency are prestored in radio station, using a frequency in the multiple frequency as connecing
Receive frequency to receive data and record the time for receiving data, obtain the frame head of data, judge whether the frame head is correct, in frame head
When correct, identification code is obtained from the data, judge whether identification code matches with the identification code for prestoring, in matching, from institute
State and obtain differential data in data, when mismatching, data and timing are continued under the frequency, continuation judges frame head and knowledge
Up to receiving, the time of data switches frequency reception data more than Preset Time to other code or frame head is correct and identification code is matched；
If frame head is incorrect, data and timing are continued under the frequency, judge frame head up to frame head is incorrect and receives data
Time receive that data or frame head be correct and identification code matching again more than Preset Time switching frequency.
In the present embodiment, an identification code can be corresponding with many reception radio station by a transmitting station, such as Fig. 1 institutes
Show, the transmitting station of base station 1 transmits identification code, mobile station receiver 221The reception radio station 21 of connection1Judge to receive radio station
211Whether the identification code for inside prestoring matches with the identification code for receiving, mobile station receiver 222The reception radio station 22 of connection1Also sentence
Radio station 21 is received in disconnecting1Whether the identification code for prestoring matches with the identification code for receiving, by that analogy, all shiftings in operating area
The reception radio station 21 of dynamic station receiver 22 connection will determine that whether the identification code for prestoring matches with the identification code for receiving.
Described in detail with reference to a pair steps of Fig. 3 and above-mentioned table as follows：Radio station is received first to be connect using frequency 1 as frequency is received
Receive data and obtain data by the time of timer start recording reception data, then, parsing data and analytically in result
Frame head.Judge whether frame head is identical with the frame head that communication protocol is arranged, if identical, then, frame head is correct, in frame head just
In the case of really, working method is as follows：
Identification code is obtained from the message, judges whether identification code matches with the identification code for prestoring, in matching, by timing
Device is reset, and the differential data in data is sent into mobile station receiver, and persistently receives data with frequency 1；In identification code
When being mismatched with the identification code for prestoring, data are continued to frequency 1 and continues the time that record receives data, connect with frequency 1
After receiving data, continuation judges whether identification code matches, and in matching, timer is reset, and transmission differential data is received to movement station
Machine simultaneously persistently receives data with frequency 1 to receive frequency；When mismatching, data are still received with frequency 1, after receiving data
Judge identification code, the process is repeated up to identification code is mismatched and receives the time of data more than Preset Time, now, even if frame
Head is correct, receives radio station and also switches to the reception data of frequency 2 from frequency 1 and reset timer；
In the case of frame head is incorrect, working method is as follows：
Data are continued to frequency 1, meanwhile, timer continues timing, judges whether the frame head of the data of reception is correct,
If correct, the step of perform above-mentioned judgement identification code；If incorrect, data still received with frequency 1 and continues timing, received
Performed after data it is foregoing judgement frame head the step of, if frame head it is also incorrect and receive data time be more than Preset Time, from
Frequency 1 switches to frequency 2 and receives data and reset timer.
Frequency 2 is switched to from frequency 1, data are received using frequency 2 as frequency is received, timer starts timing, judges number
According to frame head it is whether correct, when frame head is correct, identification code is obtained from the message, judge that identification code is with the identification code for prestoring
No matching, in matching, mobile station receiver is sent to by the differential data in data；When mismatching, continue to connect with frequency 2
Data are received, timer continues timing.After receiving data with frequency 2, continuation judges whether identification code matches, in matching, timing
Device resets, and transmission differential data persistently receives data to mobile station receiver and with frequency 2；Mismatching, still connect with frequency 2
Receipts data are more than Preset Time up to receiving the time of data, when the time of identification code mismatch and reception data being more than default
Between when, even if frame head is correct, receive radio station also from frequency 2 switch to frequency 3 receive data lay equal stress on new record receive data when
Between；
In the case where persistently data are received with frequency 2, if frame head or incorrect, data are still received simultaneously with frequency 2
Continue timing, judge the frame head of data, if the step of frame head correctly, performs above-mentioned judgement identification code, if frame head is still not
Correctly, continue timing and judge whether frame head is correct, until frame head is incorrect and receives the time of data and is more than Preset Time, from
Frequency 2 switches to frequency 3, and data are received using frequency 3 as frequency is received, the treatment of frequency 3 time receive data processes and
The process that frequency 1 and the treatment of frequency 2 times receive data is identical, repeats no more, in a word, in the manner, frame head it is incorrect and
When the time of reception data is more than Preset Time, the data that switching frequency receive continue to judge frame head up to frame head is correct or switching
N frequency in complete table one, if n=10, has switched 10 frequencies.
Refer to Fig. 3 and combine Fig. 1, the implementation method not only has the advantages that first embodiment, be additionally, since increase
Identification code judges step, even if another transmitting station 31 is sent with a frequency being pre-stored in the multiple frequencies in receiver
During message, because identification code is mismatched, receive radio station 21 and the transmitting station 31 and transmitting station 11 are distinguished and transmitting is only received
The differential data that radio station 11 sends, and then, it is ensured that positioning precision.Which can also be as first embodiment, in institute
State transmitting station internal memory and contain multiple frequencies, the transmitting station is based on switching command and switches frequency, outside with the frequency after switching
Data are sent, referring specifically to first embodiment, be will not be repeated here.
Although the second embodiment has above-mentioned advantage, in practical application, mobile station receiver can run into transition and arrive
Another situation of operating area, now, because identification code is mismatched, will cause that receiver is received not using second embodiment
The differential data that base station after to transition sends, in order to solve this problem, the improvement project of second embodiment is in institute
State and multiple identification codes are prestored in reception radio station or the identification code prestored in radio station can be more relocated the receiving manually.It is many for prestoring
The situation of individual identification code, when in the identification code for receiving with the identification code for prestoring mismatches, receives radio station and changes one
Individual identification code is compared with the identification code for receiving, and judges whether matching, until finding the identification code of matching.For manually more
Change the situation of identification code, after mobile station receiver transition to another operating area, technical staff will receive the identification code in radio station
The identification code corresponding with the identification code of the transmitting station of the operating area is changed to, how to be changed, it is possible to use existing
Technology.
Based on the technology design of method described above, invention additionally discloses a kind of system for receiving base station differential data,
The system includes base station and movement station.The base station includes reference receiver and transmitting station.The base station is received
Machine produces differential data.The transmitting station receives the differential data that base station is produced, and differential data is packaged into message outside
Send.The movement station includes mobile station receiver and receives radio station.Radio station is received to be connected with mobile station receiver by serial ports,
Receive in radio station and prestore multiple frequencies, receive data and record reception using a frequency in the frequency as frequency is received
The time of data, after receiving the data, parse data and obtain the frame head of data, whether correctly judge frame head, it is correct in frame head
When, the time of record is reset and continues to receive data, differential data is obtained from the message, by serial ports by the difference number
According to transmitting to mobile station receiver；When frame head is incorrect, data are continued to the frequency and judge frame head until frame head not
Switch that frequency receives data again or frame head is correct the times that are correct and receiving data more than Preset Time.The time of record
It is cleared when frequency is switched, or, it is cleared when frame head is correct.It is described to receive electricity in more specifically implementation method
Platform includes memory, timer, receiver module and processor.Multiple frequencies are prestored in the memory.The receiver module
Data are received using a frequency in the multiple frequency as frequency is received；The timer receives number since receiver module
According to when start timing.The processor obtains the frame head of data, when frame head is correct, controls the receiver module persistently to receive number
According to obtaining differential data from the data；When frame head is incorrect, the receiver module is controlled to be continued under the frequency
Data simultaneously control timer continue record receive data time, judge after receiving the data frame head until frame head correctly or
The time for receiving data produces switching command and controls the timer to reset more than Preset Time.The receiver module is also based on
Switching command switching frequency receives data again.
In practical application scene, it is understood that there may be following situation：Transmitting station in adjacent operating area is receiving electricity
A frequency in the multiple frequencies prestored in platform is sent out message, if still using the method described in first embodiment,
Can cause to receive the differential data that radio station receives mistake, in order to avoid such case, the present invention also provides another kind and receives base
The system of quasi- station differential data, the system increased identification code and judges step, leads to compared with system disclosed in aforementioned embodiments
Cross and judge whether identification code matches, whether frame head is correct and whether the time that is receiving data further determines that more than Preset Time and be
It is no to receive correct differential data.Illustrate that the implementation method is as follows with reference to Fig. 3, table one and Fig. 1：Receive base station differential data
System include base station 1 and multiple movement stations 2.The base station 1 includes reference receiver and transmitting station 11.Base station
Receiver produces differential data, transmission differential data to transmitting station 11.The transmitting station 11 is by the identification code and the difference
Divided data is packaged into message and is sent out the message.Each described movement station 2 includes that receiving radio station 21 and movement station receives
Machine 22, one is received radio station 21 and a mobile station receiver 22 and is connected by serial ports.Receive radio station 21 and prestore multiple frequencies
And identification code, in the case where there is identification code, the working method for receiving radio station 21 is identical with the second embodiment of preceding method,
Repeat no more.In more specifically implementation method, the reception radio station includes receiver module, timer, memory and treatment
Device；Wherein, multiple frequencies and identification code are prestored in the memory；The receiver module is with the multiple frequency
Frequency receives data, the data that transmission is received to the processor as frequency is received；The timer is received from receiver module
Start timing, transmission timing result to processor during data；The processor obtains the frame head of data, when frame head is correct, from
Identification code is obtained in the data, when identification code is matched with the identification code for prestoring, controls the receiver module persistently to receive number
According to and from obtain differential data in the data, when identification code is mismatched with the identification code for prestoring, control receiver module is at this
Continue to data under frequency and control timer continue to record the time for receiving data, continuation judge frame head and identification code up to
Receive data time produce the first switching command more than Preset Time and control the timer reset or frame head it is correct and
Control receiver module persistently receives data when identification code is matched；When frame head is incorrect, control receiver module under the frequency after
Continued access receipts data and control timer continue to record the time for receiving data, judge frame head up to frame head is correct or receives data
Time more than Preset Time and produce the second switching command and control timer reset；The receiver module is also cut based on first
Change instruction or the second switching command switching frequency receives data again.
Said system also has the advantages that described in preceding method, will not be repeated here, in addition, those skilled in the art can
To understand, based on design of the invention, there can also be following manner, these modes are simply described as follows：
1st, prestored multiple frequencies, and data are received using a frequency in the multiple frequency as frequency is received；Obtain number
According to frame head, judge whether the frame head correct, if frame head is correct, identification code is obtained from the data for receiving, judge to know
Whether other code matches with the identification code for prestoring, if it does, persistently receiving data under the frequency and being obtained from the data
Differential data, if it does not match, switching frequency receives data and judges whether frame head is correct；If frame head is incorrect,
Switching frequency receives data and continues to judge whether frame head is correct.Reception radio station corresponding with which can include memory,
Receiver module and processor.Identification code and multiple frequencies are prestored in the memory.The receiver module is with the multiple frequency
A frequency in point receives data as frequency is received.The processor obtains the frame head of data, when frame head is correct, from connecing
Identification code is obtained in the data of receipts, when the identification code is matched with the identification code for prestoring, controls the receiver module persistently to receive
Data simultaneously obtain differential data from the data, when the identification code is mismatched with the identification code for prestoring, produce first to switch
Instruction；When frame head is incorrect, the second switching command is produced.The receiver module is also cut based on the first switching command or second
Change instruction switching frequency and receive data.As the improved procedure of this mode, multiple identification codes, this kind of situation can also be prestored
Under, it is described if it does not match, switching frequency receive data include：In the identification code for receiving and the identification code for prestoring
During mismatch, change identification code and judged with the identification code for receiving, until the identification code for receiving and for prestoring
Identification code is matched or the identification code for receiving mismatches switching frequency and receives data with all identification codes for prestoring.
2nd, prestored multiple frequencies, and data are received using a frequency in the multiple frequency as frequency is received；With described
A frequency in multiple frequencies receives data as frequency is received；The frame head of data is obtained, judges whether the frame head is correct,
If frame head is correct, differential data is persistently received under the frequency and differential data is obtained from the data；If frame head
Incorrect, then, switching frequency receives data and continues to judge whether frame head is correct.A kind of reception radio station corresponding with this mode
It can be following structure：The reception radio station includes memory, receiver module and processor.Multiple is prestored in the memory
Frequency.The receiver module receives data using a frequency in multiple frequencies as frequency is received, and transfers data to the place
Reason device.The processor obtains the frame head of data, controls the receiver module persistently to receive data when frame head is correct, from reception
Data in obtain differential data；When frame head is incorrect, switching command is produced.The receiver module is also based on the switching command
Switching frequency receives data.
The advantage of said system is identical with the advantage of preceding method, will not be repeated here.
Claims (20)
- It is 1. a kind of to receive radio station, it is characterised in that：Multiple frequencies are prestored in the reception radio station, with the multiple frequency One frequency receives data as frequency is received；The frame head of data is obtained, when frame head is correct, difference is obtained from the data for receiving Divided data；When frame head is incorrect, switching frequency receives data and judges frame head.
- 2. reception radio station according to claim 1, it is characterised in that：The reception radio station includes memory, receiver module And processor, wherein,Multiple frequencies are prestored in the memory；The receiver module receives data using a frequency in multiple frequencies as frequency is received, and transfers data to the treatment Device；The processor obtains the frame head of data, controls the receiver module persistently to receive data when frame head is correct, from reception Data in obtain differential data；When frame head is incorrect, switching command is produced；The receiver module also receives data based on switching command switching frequency.
- It is 3. a kind of to receive radio station, it is characterised in that：Multiple frequencies are prestored in the reception radio station, with the multiple frequency As receiving, frequency receives data to one frequency and start recording receives the time of data；The frame head of data is obtained, in frame head just When really, data are persistently received under the frequency and differential data is obtained from the data；When frame head is incorrect, in the frequency Under continue to data and continue record receive data time, judge after receiving the data frame head until reception data when Between switch that frequency receives data and timing again or frame head is correct more than Preset Time.
- 4. reception radio station according to claim 3, it is characterised in that：The reception radio station includes memory, timer, connects Module and processor are received, wherein,Multiple frequencies are prestored in the memory；The receiver module receives data using a frequency in the multiple frequency as frequency is received；The timer since receiver module receive data when timing；The processor obtains the frame head of data, when frame head is correct, controls the receiver module persistently to be received under the frequency Data, differential data is obtained from the data；When frame head is incorrect, the receiver module is controlled to continue to connect under the frequency Receive data simultaneously control timer continue record receive data time, judge after receiving the data frame head until frame head correctly or Person produces switching command and controls the timer to reset in the time for receiving data more than Preset Time.The receiver module also receives data again based on switching command switching frequency.
- It is 5. a kind of to receive radio station, it is characterised in that：Multiple frequencies and identification code are prestored in the reception radio station, with the multiple A frequency in frequency receives data as frequency is received；The frame head of data is obtained, when frame head is correct, from the data for receiving Middle acquisition identification code, when the identification code is matched with the identification code for prestoring, persistently receives data and from the number under the frequency According to middle acquisition differential data, when the identification code is mismatched with the identification code for prestoring, switching frequency receives data；In frame head not just When really, switching frequency receives data.
- 6. reception radio station according to claim 5, it is characterised in that：Multiple identification codes are prestored in the reception radio station, It is described when the identification code is mismatched with the identification code that prestores, switching frequency receives data to be included：The identification code that receives with When the identification code for prestoring is mismatched, change identification code and judged with the identification code for receiving, until this is received Identification code matched with the identification code for prestoring or the identification code for receiving and all identification codes for prestoring not Data are received with switching frequency.
- 7. reception radio station according to claim 5, it is characterised in that：The reception radio station includes memory, receiver module And processor, wherein,Identification code and multiple frequencies are prestored in the memory；The receiver module receives data using a frequency in the multiple frequency as frequency is received；The processor obtains the frame head of data, when frame head is correct, identification code is obtained from the data for receiving, in the identification code When being matched with the identification code for prestoring, the receiver module is controlled data persistently to be received under the frequency and is obtained from the data Differential data, when the identification code is mismatched with the identification code for prestoring, produces the first switching command；When frame head is incorrect, produce Raw second switching command；The receiver module also receives data based on the first switching command or the second switching command switching frequency.
- It is 8. a kind of to receive radio station, it is characterised in that：Multiple frequencies and identification code are prestored in the reception radio station, with the multiple A frequency in frequency receives data and records the time for receiving data as frequency is received；The frame head of data is obtained, in frame When head is correct, identification code is obtained from the data, when the identification code is matched with the identification code for prestoring, obtained from the data Differential data is obtained, when identification code is mismatched with the identification code for prestoring, data is continued under the frequency and continuation record is connect Receive the time of data, continuation judges frame head and identification code until the time for receiving data switches frequency reception more than Preset Time Data or frame head are correctly and identification code is matched；When frame head is incorrect, data is continued under the frequency and record is received The time of data, judge whether frame head is correct and switch frequency and receive number again more than Preset Time up to receiving the time of data According to or frame head it is correct.
- 9. reception radio station according to claim 8, it is characterised in that：Multiple identification codes are prestored in the reception radio station, It is described when identification code is mismatched with the identification code that prestores, data are continued under the frequency and record receive the time of data Including：When the identification code is mismatched with the identification code for prestoring, change identification code and judged with the identification code, until should The identification code for receiving is matched with the identification code for prestoring, or, the identification code that this is received and all identification codes for prestoring When mismatching, data are continued under the frequency and record receives the time of data.
- 10. reception radio station according to claim 8, it is characterised in that：The reception radio station includes receiver module, timing Device, memory and processor；Wherein,Multiple frequencies and identification code are prestored in the memory；The receiver module receives data using a frequency in the multiple frequency as frequency is received, and transmits the data for receiving To the processor；The timer when receiver module receives data timing, transmission timing result is to processor；The processor obtains the frame head of data, when frame head is correct, identification code is obtained from the data, identification code with it is pre- When the identification code deposited is matched, control the receiver module persistently to receive data and obtain differential data from the data, knowing When other code is mismatched with the identification code for prestoring, control receiver module continues to data under the frequency and control timer continues Record receives the time of data, and continuation judges frame head and identification code until the time for receiving data produces first more than Preset Time Control receiver module is under the frequency when switching command and the control timer clearing or frame head are correctly and identification code is matched Persistently receive data；When frame head is incorrect, control receiver module continued under the frequency data and control timer after Continue the time that record receives data, judge frame head up to frame head is correct or the time of reception data produces more than Preset Time Second switching command and control timer reset；The receiver module also receives data again based on the first switching command or the second switching command switching frequency.
- A kind of 11. systems for receiving base station differential data, including base station and movement station, the base station include transmitting electricity Platform, the transmitting station is sent out message；The movement station includes receiving radio station, it is characterised in that：The reception radio station is Reception radio station any one of Claims 1-4.
- 12. systems that base station differential data is received according to claim 11, it is characterised in that：The transmitting station internal memory Multiple frequencies are contained, and frequency is switched based on switching command.
- A kind of 13. systems for receiving base station differential data, including base station and movement station, the base station include transmitting electricity Platform, the transmitting station is sent out message；The movement station includes receiving radio station, it is characterised in that：The reception radio station is Reception radio station any one of claim 5 to 10, the identification code that all reception radio station prestore is identical, the identification Code is corresponding with the reception radio station by transmitting station.
- 14. systems that base station differential data is received according to claim 13, it is characterised in that：The transmitting is stored with many Individual frequency, and frequency is switched based on switching command.
- A kind of 15. methods for receiving base station differential data, it is characterised in that：The method comprises the following steps：Prestored multiple frequencies, and data are received using a frequency in the multiple frequency as frequency is received；The frame head of data is obtained, when frame head is correct, differential data is obtained from the data；When frame head is incorrect, switching Frequency receives data.
- A kind of 16. methods for receiving base station differential data, it is characterised in that：The method comprises the following steps：Prestore multiple frequencies, receives data and records reception data using a frequency in the multiple frequency as frequency is received Time；The frame head of data is obtained, when frame head is correct, differential data is obtained from the data for receiving；When frame head is incorrect, Data are continued under the frequency and continues the time that record receives data, frame head is judged until receiving data after receiving data Time switches frequency reception data more than Preset Time or frame head is correct.
- A kind of 17. methods for receiving base station differential data, it is characterised in that：The method comprises the following steps：Prestored multiple frequencies and identification code, and data are received using a frequency in the multiple frequency as frequency is received；The frame head of data is obtained, when frame head is correct, identification code is obtained from the data for receiving, in the identification code and the knowledge for prestoring When other code are matched, data are persistently received under the frequency and differential data is obtained from the data, the identification code with prestore Identification code mismatch when, switching frequency receive data；When frame head is incorrect, switching frequency receives data.
- 18. methods that base station differential data is received according to claim 17, it is characterised in that：The identification code for prestoring There is multiple；It is described when the identification code is mismatched with the identification code that prestores, switching frequency receives data to be included：In the knowledge for receiving When other code is mismatched with the identification code for prestoring, change identification code and judged with the identification code for receiving, until the reception To identification code matched with the identification code for prestoring or the identification code for receiving with all identification codes for prestoring not Matching switching frequency receives data.
- A kind of 19. methods for receiving base station differential data, it is characterised in that the method comprises the following steps：Prestore multiple frequencies and identification code, receives data and records using a frequency in the multiple frequency as frequency is received Receive the time of data；The frame head of data is obtained, when frame head is correct, identification code is obtained from the data, in the identification code and the identification for prestoring During code matching, data persistently received under the frequency and obtain differential data from the data, the identification code with prestore When identification code is mismatched, data are continued under the frequency and continues to record the time for receiving data, sentenced after receiving data Disconnected frame head and identification code until the time for receiving data switch more than Preset Time frequency receive data or frame head it is correct and Identification code is matched；When frame head is incorrect, data is received under the frequency and continues to record the time of the reception data, connect Frame head is judged until the time for receiving data receives data more than Preset Time switching frequency or frame head is correct after receiving data.
- 20. methods that base station differential data is received according to claim 19, it is characterised in that：The identification code for prestoring There is multiple, it is described when identification code is mismatched with the identification code for prestoring, data are continued under the frequency and record receives number According to time include：When the identification code is mismatched with the identification code for prestoring, change identification code and sentenced with the identification code It is disconnected, until the identification code for receiving is matched with the identification code for prestoring, or, the identification code that this is received and the institute for prestoring When thering is identification code to mismatch, data are continued under the frequency and record receives the time of data.
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