CN106937318B - Surveying and mapping communication system - Google Patents
Surveying and mapping communication system Download PDFInfo
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- CN106937318B CN106937318B CN201710065719.7A CN201710065719A CN106937318B CN 106937318 B CN106937318 B CN 106937318B CN 201710065719 A CN201710065719 A CN 201710065719A CN 106937318 B CN106937318 B CN 106937318B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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Abstract
The invention discloses a mapping communication system, comprising: a base station mapping device, a mobile station mapping device and a communication server; the base station mapping equipment is provided with a first radio antenna, and the mobile station mapping equipment is provided with a second radio antenna; the base station mapping equipment establishes a first IP connection with the communication server, and the mobile station mapping equipment establishes a second IP connection with the communication server; the mobile station mapping equipment detects a communication frequency band, sets a receiving frequency band of a second radio station antenna to be the same as the communication frequency band, and sends information of the communication frequency band to a communication server through the second IP connection; the communication server sends the received information of the communication frequency band to the base station mapping equipment through the first IP connection; and the base station mapping equipment sets the transmitting frequency band of the first radio station antenna to be the same as the communication frequency band according to the received information of the communication frequency band. By adopting the embodiment of the invention, the mobile station mapping equipment can establish direct two-way communication with the base station mapping equipment.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a surveying and mapping communication system.
Background
When surveying and mapping or measuring the geographic environment, base station surveying and mapping equipment needs to be erected, positioning data of the base station surveying and mapping equipment is sent to mobile station surveying and mapping equipment through a wireless data link, and after the mobile station surveying and mapping equipment obtains the positioning data of the base station surveying and mapping equipment, the obtained positioning data is corrected to obtain high-precision positioning coordinates; the wireless data link generally preferentially adopts a broadcasting station mode (unlike communication data link modules 3G and 4G which need to pay flow fee), in order to facilitate data transmission at a long distance, base station mapping equipment adopts a high-power radio station to transmit, mobile station mapping equipment adopts a low-power transceiver station to receive, and unidirectional communication is completed by receiving data of preset working frequency.
With reference to the drawing communication system provided in fig. 1, the work flow of the above scheme specifically includes:
firstly, erecting base station mapping equipment in a measured area, and presetting communication frequency and communication protocol of the base station mapping equipment; secondly, setting the communication frequency and the communication protocol of the mobile station mapping equipment to be consistent with those set by the base station mapping equipment; then, the mobile station walks to the measuring points in the mobile measuring area one by one to carry out measuring work; when the measurement work is abnormal, the mobile station staff telephone the watchful base station surveying and mapping equipment staff to confirm whether the power supply of the base station surveying and mapping equipment is normal or not and whether the base station surveying and mapping equipment is transmitting or not, and then blindly appointing another working frequency to continue working again; when the mobile station mapping equipment receives the radio station data of the base station mapping equipment, the mobile station mapping equipment can continue to work downwards.
The above conventional work scheme has several problems:
1. the base station mapping device or the mobile station mapping device cannot determine that communication interference exists.
2. The communication mode of both the mobile station mapping equipment and the base station mapping equipment is a one-way communication mode of a broadcasting station, so that direct two-way communication cannot be established.
3. When the same frequency interference occurs, the mobile station mapping equipment cannot normally receive mapping data in the receiving frequency band, and then subsequent work is influenced, and the transmitting frequency band of the base station mapping equipment and the receiving frequency band of the mobile station mapping equipment must be reset and set on a non-interference communication frequency band to continue working.
4. Because the mobile station mapping equipment can only receive data from the receiving frequency band, the mobile station mapping equipment cannot know the working state of the base station mapping equipment, and the problem of difficult positioning is caused when the working is abnormal.
5. Need surveying personnel's duty in basic station mapping equipment department, set up the transmission frequency channel and receive the frequency channel through other communication frequency channels of telephone communication anew blindly when appearing working unusually, just can solve the communication anomaly.
6. Because unable direct two-way communication of establishing between mobile station mapping equipment and the base station mapping equipment, therefore at this period of time of mobile station mapping equipment change next test point, base station mapping equipment is in the transmitting state always, needs the storage battery to last the power supply, then base station mapping equipment storage battery utilization ratio is not high.
Disclosure of Invention
The embodiment of the invention aims to provide a mapping communication system, which provides a communication server to establish direct two-way communication between mobile station mapping equipment and base station mapping equipment, so that when communication interference occurs, a communication frequency band is reset to ensure that mapping communication is normal.
To achieve the above object, an embodiment of the present invention provides a mapping communication system, including: a base station mapping device, a mobile station mapping device and a communication server; the base station mapping equipment is provided with a first radio antenna, and the mobile station mapping equipment is provided with a second radio antenna; the base station mapping device establishing a first IP connection with the communication server, the mobile station mapping device establishing a second IP connection with the communication server;
the mobile station mapping equipment is used for detecting a communication frequency band capable of being used for radio station communication, setting the receiving frequency band of the second radio station antenna to be the same as the communication frequency band, and sending the information of the communication frequency band to the communication server through the second IP connection;
the communication server is used for sending the received information of the communication frequency band to the base station mapping equipment through the first IP connection;
the communication server is specifically configured to, when a receiving frequency band and a transmitting frequency band need to be reset, transmit the communication frequency band detected by the mobile station mapping device to the base station mapping device, where the communication frequency band is non-interfering;
the base station mapping equipment is used for setting the transmitting frequency band of the first radio station antenna to be the same as the communication frequency band according to the received information of the communication frequency band;
the second radio station antenna is a radio frequency power radio station antenna and is powered by a storage battery;
the base station mapping equipment is further used for detecting the electric quantity value of the storage battery, judging that the electric quantity of the storage battery is sufficient when the electric quantity value is higher than a first electric quantity threshold value, and judging that the electric quantity of the storage battery is insufficient when the electric quantity value is lower than the first electric quantity threshold value; the information that the electric quantity of the storage battery is sufficient or insufficient is sent to the communication server through the first IP connection;
the communication server is further used for sending the received information that the storage battery is sufficient in electric quantity or insufficient in electric quantity to the mobile station mapping equipment through the second IP connection;
the mobile station mapping equipment is further used for selecting a transmitting mechanism of the base station mapping equipment according to the information when the information that the storage battery has sufficient or insufficient electric quantity is received; when the information is that the electric quantity of the storage battery is sufficient, the transmitting mechanism is continuously transmitting; and when the information is insufficient, the transmitting mechanism is response transmission.
Further, the mobile station mapping device detects a communication frequency band that can be used for radio station communication, specifically:
after establishing the second IP connection or when mapping data cannot be received in the receiving frequency band of the second radio antenna, the mobile station mapping equipment detects the bottom noise levels of the M frequency bands, and selects the frequency band with the lowest level of the bottom noise levels in the M frequency bands as a communication frequency band; wherein the M frequency bands do not include a reception frequency band of the second radio antenna.
Further, the process of detecting the noise floor level of each frequency band specifically includes:
sampling N sampling points in the frequency band within a preset time period;
and carrying out data smoothing processing on the N sampling points to obtain the bottom noise level of the frequency band.
Preferably, M is 10.
Preferably, the preset time period is 2 seconds; n is 120.
Further, the mobile station mapping device is further configured to select a mapping location, and send a transmission request to the communication server through the second IP connection after selecting the mapping location; and for controlling the second radio antenna to prepare to receive differential data from the receive band;
the communication server is further configured to send the received transmission request to the base station mapping device through the first IP connection;
and the base station mapping equipment is further used for controlling the first radio station antenna to load the mapped differential data into the transmission frequency band and transmit the mapped differential data outwards after the received transmission request.
Further, the mobile station mapping device is further configured to correct the detected positioning data of the mapping place according to the received differential data, and send a transmission stop request to the communication server through the second IP connection after obtaining the corrected positioning data;
the communication server further configured to send the received transmission stop request to the base station mapping device over the first IP connection;
and the base station mapping equipment is further used for controlling the first radio station antenna to stop loading the mapped differential data into the transmission frequency band for outward transmission after receiving the transmission stop request.
Furthermore, the second radio station antenna is a radio frequency power radio station antenna and is powered by a storage battery;
the base station mapping equipment is further used for detecting the electric quantity value of the storage battery, judging that the electric quantity of the storage battery is sufficient when the electric quantity value is higher than a first electric quantity threshold value, and judging that the electric quantity of the storage battery is insufficient when the electric quantity value is lower than the first electric quantity threshold value; the information that the electric quantity of the storage battery is sufficient or insufficient is sent to the communication server through the first IP connection;
the communication server is further used for sending the received information that the storage battery is sufficient in electric quantity or insufficient in electric quantity to the mobile station mapping equipment through the second IP connection;
the mobile station mapping equipment is further used for selecting a transmitting mechanism of the base station mapping equipment according to the information when the information that the storage battery has sufficient or insufficient electric quantity is received; when the information is that the electric quantity of the storage battery is sufficient, the transmitting mechanism is continuously transmitting; and when the information is insufficient, the transmitting mechanism is response transmission.
Further, the base station mapping device is further configured to generate alarm information when the electric quantity value is lower than a second electric quantity threshold; the alarm information is used for informing a surveying and mapping personnel to replace a storage battery of the base station surveying and mapping equipment.
The embodiment of the invention has the following beneficial effects:
in the mapping communication system provided by the embodiment of the invention, the communication server is provided to establish bidirectional IP communication between the mobile station measuring equipment and the base station measuring equipment, and then the mobile station measuring equipment detects a non-interference communication frequency band when communication interference occurs to set the receiving frequency band of the mobile station measuring equipment and the transmitting frequency band of the base station measuring equipment, so that the mobile station measuring equipment and the base station measuring equipment can continuously carry out mapping communication through a radio station. And judging the signal intensity of a frequency point by repeatedly sampling and detecting the background noise level on the frequency point in a preset time period, and selecting the frequency point with the lowest background noise level as a communication frequency band, so that the interference degree of the communication frequency band is lowest, and the communication quality between the mobile station measuring equipment and the base station measuring equipment is highest. In addition, the base station mapping equipment reports the electric quantity state at regular time, and the mobile mapping equipment can select a transmitting mechanism of the base station measuring equipment according to the reported electric quantity information, so that the service efficiency of the storage battery is improved.
Drawings
Fig. 1 is a schematic structural diagram of a mapping communication system provided in the prior art;
fig. 2 is a schematic structural diagram of an embodiment of the mapping communication system provided in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To prior art's survey and drawing communication system, base station surveying and drawing equipment and mobile station surveying and drawing equipment are provided with the radio station antenna respectively, the communication frequency channel that sets up the radio station antenna is the same, then survey and drawing working process generally does, base station surveying and drawing equipment launches the differential data of surveying and drawing through the transmission frequency channel of its radio station antenna, then mobile station surveying and drawing equipment receives the data of this frequency channel through the receiving frequency channel of its radio station antenna, above-mentioned differential data promptly, then mobile station surveying and drawing equipment revises the positioning data that self detected survey and drawing place and obtain the high accuracy coordinate of surveying and drawing place according to this differential data. Because the above prior art node-measuring communication system has the defect of being incapable of bidirectional communication, the present invention further provides the following surveying and mapping communication system to solve the above problems.
Referring to fig. 1, it is a schematic structural diagram of an embodiment of a mapping communication system provided in the present invention;
an embodiment of the present invention provides a mapping communication system, including: base station mapping device 10, mobile station mapping device 20, and communication server 30; the base station mapping device 10 is provided with a first radio antenna and the mobile station mapping device 20 is provided with a second radio antenna; the base station mapping device 10 establishes a first IP connection with the communication server 30, the mobile station mapping device 20 establishes a second IP connection with the communication server 30;
the mobile station mapping device 20 is configured to detect a communication frequency band that can be used for radio station communication, set a receiving frequency band of the second radio station antenna to be the same as the communication frequency band, and send information of the communication frequency band to the communication server 30 through the second IP connection;
the communication server 30 is configured to send the received information of the communication frequency band to the base station mapping apparatus 10 through the first IP connection;
the base station mapping device 10 is configured to set the transmission frequency band of the first radio station antenna to be the same as the communication frequency band according to the received information of the communication frequency band.
It should be noted that the established IP connection is a communication network established by a third generation or fourth generation communication technology, or a wireless network through an IP dial-up connection. The communication server 30 according to the embodiment of the present invention may transmit the non-interfering communication frequency band detected by the mobile station mapping device 20 to the base station mapping device 10 when the receiving frequency band and the transmitting frequency band need to be reset, so that the base station mapping device 10 may set the transmitting frequency band of the first radio station antenna as the received communication frequency band, and further, the mobile station mapping device 20 may communicate with the base station mapping device 10.
In addition, since the mapping process ensures that the radio antenna of the mobile station mapping device 20 can correctly receive the differential data transmitted by the base station mapping device 10, and the geographic environments of the base station mapping device 10 and the mobile station mapping device 20 are different, and the surrounding interference is also different, only the mapping location, that is, the environment surrounding the mobile station mapping device 20, can truly reflect the interference situation on the communication frequency band, and the interference situation surrounding the base station mapping device 10 cannot reflect the interference situation of the communication frequency band, it is necessary for the mobile station mapping device 20 to detect the communication frequency band that can be used for radio communication, that is, detect the communication frequency band that does not receive co-channel interference, and then it can ensure that the radio antenna of the mobile station mapping device 20 correctly receives the differential data transmitted by the base station mapping device 10.
Further, the mobile station mapping device 20 detects a communication frequency band that can be used for station communication, specifically:
after establishing the second IP connection or when mapping data cannot be received in the receiving frequency band of the second radio antenna, the mobile station mapping device 20 detects the bottom noise levels of M frequency bands, and selects the frequency band with the lowest bottom noise level among the M frequency bands as a communication frequency band; wherein the M frequency bands do not include a reception frequency band of the second radio antenna. In the embodiment of the present invention, M is preferably 10, but is not limited to M being 10, and may be other values.
It should be noted that, by detecting the background noise level of a certain frequency band, the signal strength of the frequency band can be detected, and then whether the frequency band is interfered can be determined, and if the frequency band with the lowest background noise level receives the lowest interference signal, the distortion degree when data is loaded in the frequency band for transmission is the lowest.
Further, the process of detecting the noise floor level of each frequency band specifically includes:
sampling N sampling points in the frequency band within a preset time period;
and carrying out data smoothing processing on the N sampling points to obtain the bottom noise level of the frequency band. Preferably, the preset time period is 2 seconds; n is 120.
For example, if a frequency band is 12.5 bandwidth, then a reference frequency point is used as a reference to detect the background noise levels of 10 frequency bands adjacent to the reference frequency point, and the frequency band information with the lowest background noise level is sent to communication server 30, then communication server 30 informs base station mapping device 10 of "the communication frequency band agreed again between mobile station mapping device 20 and base station mapping device 10".
Further, after mobile station mapping apparatus 20 and base station mapping apparatus 10 reset the communication band, the mapping operation between mobile station mapping apparatus 20 and base station mapping apparatus 10 is as follows:
first, the mobile station mapping device 20 selects a mapping place and sends a transmission request to the communication server 30 through the second IP connection after selecting the mapping place; and for controlling the second radio antenna to prepare to receive differential data from the receive band;
then, the communication server 30 sends the received transmission request to the base station mapping device 10 over the first IP connection;
furthermore, after receiving the transmission request, the base station mapping device 10 controls the first radio antenna to load the mapped differential data into the transmission frequency band and transmit the mapped differential data to the outside, and then the mobile station mapping device 20 receives the differential data from the reception frequency band through the second radio antenna. It should be noted that, in the above-mentioned communication frequency band setting, the transmission frequency band and the reception frequency band have been set to be the same.
And the mobile station surveying equipment 20 correcting the detected positioning data of the surveying place based on the received differential data.
After the mobile station surveying device 20 finishes surveying the above surveying location, i.e. obtains the corrected positioning data, the surveying personnel changes the surveying location, i.e. moves the mobile station surveying device 20 to the next surveying location for surveying, and then in this period of time, in order to improve the efficiency of the use of the power for powering the radio antenna of the base station surveying device 10, the following improvements are made:
after obtaining the corrected positioning data, the mobile station mapping device 20 sends a transmission stop request to the communication server 30 via the second IP connection;
the communication server 30, further configured to send the received transmission stop request to the base station mapping device 10 through the first IP connection;
the base station mapping device 10 is further configured to control the first radio station antenna to stop loading the mapped differential data into the transmission frequency band for outward transmission after receiving the transmission stop request. Thus, base station mapping device 10 stops transmitting differential data outward, i.e., base station mapping device 10 is in a standby state, before mobile station mapping device 20 moves to the next mapping location for mapping, improving the efficiency of use of the power supplied to the radio antenna of base station mapping device 10.
Further, generally, in order to enable the signal emitted from the second radio antenna of the base station mapping device 10 to cover a wider distance, the mobile station measurement device employs a radio antenna with a radio frequency power of 30W or more to emit, so that the radio antenna needs to be powered by the battery 40, and in order to improve the efficiency of the battery 40, the base station mapping device 10 is configured to report the electric quantity information of the battery 40 at regular time, and the specific reporting working process is as follows:
the base station mapping equipment 10 detects the electric quantity value of the battery 40, judges that the battery 40 has enough electric quantity when the electric quantity value is higher than a first electric quantity threshold value, and judges that the battery 40 has insufficient electric quantity when the electric quantity value is lower than the first electric quantity threshold value; and the information that the electric quantity of the storage battery 40 is sufficient or insufficient is sent to the communication server 30 through the first IP connection;
the communication server 30 sends the received information that the battery 40 is full or insufficient to the mobile station mapping device 20 through the second IP connection;
when the mobile station mapping device 20 receives the information that the battery 40 is full or insufficient, the transmission mechanism of the base station mapping device 10 is selected according to the information; wherein, when the information is that the battery 40 has sufficient power, the transmitting mechanism is continuous transmission; and when the information is insufficient, the transmitting mechanism is response transmission.
It should be noted that the continuous transmission in the embodiment of the present invention means that after receiving the transmission request, the differential data is continuously transmitted until receiving the request for stopping transmission, and the reply transmission means that after receiving the transmission request, only the currently detected differential data is transmitted, and then the transmission is suspended until receiving the transmission request again, and then the currently detected differential data is transmitted again.
Further, the base station mapping device 10 is further configured to generate alarm information when the electric quantity value is lower than a second electric quantity threshold; the alarm information is used to inform the mapping personnel to replace the battery 40 of the base station mapping apparatus 10.
Specifically, this alarm information sends mobile station measuring equipment to through communication server 30, because mobile station measuring equipment is surveyed by surveying personnel watch on, then mobile station surveying equipment 20 can inform surveying personnel with this alarm information, and surveying personnel accomplishes the measurement as early as possible to change base station surveying equipment 10's storage battery 40. The electric quantity condition and the alarm information are generated and transmitted, and the service efficiency of the storage battery 40 is improved.
The embodiment of the invention has the following beneficial effects:
in the mapping communication system provided by the embodiment of the invention, the communication server is provided to establish bidirectional IP communication between the mobile station measuring equipment and the base station measuring equipment, and then the mobile station measuring equipment detects a non-interference communication frequency band when communication interference occurs to set the receiving frequency band of the mobile station measuring equipment and the transmitting frequency band of the base station measuring equipment, so that the mobile station measuring equipment and the base station measuring equipment can continuously carry out mapping communication through a radio station. And judging the signal intensity of a frequency point by repeatedly sampling and detecting the background noise level on the frequency point in a preset time period, and selecting the frequency point with the lowest background noise level as a communication frequency band, so that the interference degree of the communication frequency band is lowest, and the communication quality between the mobile station measuring equipment and the base station measuring equipment is highest. In addition, the base station mapping equipment reports the electric quantity state at regular time, and the mobile mapping equipment can select a transmitting mechanism of the base station measuring equipment according to the reported electric quantity information, so that the service efficiency of the storage battery is improved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A mapping communication system, comprising: a base station mapping device, a mobile station mapping device and a communication server; the base station mapping equipment is provided with a first radio antenna, and the mobile station mapping equipment is provided with a second radio antenna; the base station mapping device establishing a first IP connection with the communication server, the mobile station mapping device establishing a second IP connection with the communication server;
the mobile station mapping equipment is used for detecting a communication frequency band capable of being used for radio station communication, setting the receiving frequency band of the second radio station antenna to be the same as the communication frequency band, and sending the information of the communication frequency band to the communication server through the second IP connection;
the communication server is used for sending the received information of the communication frequency band to the base station mapping equipment through the first IP connection;
the communication server is specifically configured to, when a receiving frequency band and a transmitting frequency band need to be reset, transmit the communication frequency band detected by the mobile station mapping device to the base station mapping device, where the communication frequency band is non-interfering;
the base station mapping equipment is used for setting the transmitting frequency band of the first radio station antenna to be the same as the communication frequency band according to the received information of the communication frequency band;
the second radio station antenna is a radio frequency power radio station antenna and is powered by a storage battery;
the base station mapping equipment is further used for detecting the electric quantity value of the storage battery, judging that the electric quantity of the storage battery is sufficient when the electric quantity value is higher than a first electric quantity threshold value, and judging that the electric quantity of the storage battery is insufficient when the electric quantity value is lower than the first electric quantity threshold value; the information that the electric quantity of the storage battery is sufficient or insufficient is sent to the communication server through the first IP connection;
the communication server is further used for sending the received information that the storage battery is sufficient in electric quantity or insufficient in electric quantity to the mobile station mapping equipment through the second IP connection;
the mobile station mapping equipment is further used for selecting a transmitting mechanism of the base station mapping equipment according to the information when the information that the storage battery has sufficient or insufficient electric quantity is received; when the information is that the electric quantity of the storage battery is sufficient, the transmitting mechanism is continuously transmitting; and when the information is insufficient, the transmitting mechanism is response transmission.
2. The mapping communication system of claim 1, wherein the mobile station mapping device detects a communication band available for station communication, and specifically:
after establishing the second IP connection or when mapping data cannot be received in the receiving frequency band of the second radio antenna, the mobile station mapping equipment detects the bottom noise levels of the M frequency bands, and selects the frequency band with the lowest level of the bottom noise levels in the M frequency bands as a communication frequency band; wherein the M frequency bands do not include a reception frequency band of the second radio antenna.
3. The mapping communication system of claim 2, wherein the process of detecting the noise floor level for each frequency band is embodied as:
sampling N sampling points in the frequency band within a preset time period;
and carrying out data smoothing processing on the N sampling points to obtain the bottom noise level of the frequency band.
4. A mapping communication system according to claim 2 or 3 in which M is 10.
5. The mapping communication system of claim 3, wherein the preset period of time is 2 seconds; n is 120.
6. The mapping communication system of claim 1,
the mobile station mapping device is further configured to select a mapping location and send a transmission request to the communication server through the second IP connection after selecting the mapping location; and for controlling the second radio antenna to prepare to receive differential data from the receive band;
the communication server is further configured to send the received transmission request to the base station mapping device through the first IP connection;
and the base station mapping equipment is further used for controlling the first radio station antenna to load the mapped differential data into the transmission frequency band and transmit the mapped differential data outwards after the received transmission request.
7. The mapping communication system of claim 6,
the mobile station mapping device is further configured to correct the detected positioning data of the mapping place according to the received differential data, and send a transmission stop request to the communication server through the second IP connection after obtaining the corrected positioning data;
the communication server further configured to send the received transmission stop request to the base station mapping device over the first IP connection;
and the base station mapping equipment is further used for controlling the first radio station antenna to stop loading the mapped differential data into the transmission frequency band for outward transmission after receiving the transmission stop request.
8. The mapping communication system of claim 1,
the base station mapping equipment is further used for generating alarm information when the electric quantity value is lower than a second electric quantity threshold value; the alarm information is used for informing a surveying and mapping personnel to replace a storage battery of the base station surveying and mapping equipment.
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| CN201710065719.7A CN106937318B (en) | 2017-02-06 | 2017-02-06 | Surveying and mapping communication system |
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| CN106937318B true CN106937318B (en) | 2020-03-24 |
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| CN201532460U (en) * | 2009-06-24 | 2010-07-21 | 西安北方光电有限公司 | Surveying and mapping device |
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| CN106937318A (en) | 2017-07-07 |
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Application publication date: 20170707 Assignee: GUANGZHOU GEOELECTRON Co.,Ltd. Assignor: Zhao Xiang Contract record no.: X2020980002601 Denomination of invention: Mapping communication system Granted publication date: 20200324 License type: Exclusive License Record date: 20200601 |