CN106685551A - Signal frequency occupation evaluating system - Google Patents
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- CN106685551A CN106685551A CN201710069681.0A CN201710069681A CN106685551A CN 106685551 A CN106685551 A CN 106685551A CN 201710069681 A CN201710069681 A CN 201710069681A CN 106685551 A CN106685551 A CN 106685551A
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- 238000011156 evaluation Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000004220 aggregation Methods 0.000 claims description 8
- 230000002776 aggregation Effects 0.000 claims description 8
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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Abstract
The invention provides a scheme of integrating spectrum detection data. A spectrum detection terminal is arranged in each frequency allocation region of a target frequency band, information of frequency within the range and belonging to the target frequency band is detected through the spectrum detection terminals, frequency occupation information is obtained, a frequency management platform is further used for comprehensively analyzing the frequency occupation information collected by all the spectrum detection terminals to obtain the frequency occupation evaluating information of the target frequency band in the region range, the measurement accuracy of the occupation degree of the target frequency band in the region is improved, furthermore, the frequency occupation trend information of the target frequency band within appointed time frame can be predicted according to the frequency occupation evaluating information, and the use ratio of spectrum resources is increased.
Description
Technical Field
The invention relates to the field of frequency monitoring, in particular to a signal frequency occupation evaluation system.
Background
A radio monitoring network built in China is built by a plurality of manufacturers, the manufacturers also build respective radio frequency station management systems, asset management systems, equipment detection systems, administrative law enforcement systems and other informatization projects, and the systems of the manufacturers operate independently to cause that data cannot be shared; in addition, the monitoring task is executed by taking manpower as a main machine as an auxiliary mode, the efficiency is low, especially the frequency spectrum occupancy rate measurement work is long, and the analysis result cannot be obtained in time, so that the frequency spectrum resource utilization rate is low.
Has great significance for the reasonable utilization of frequency spectrum. For example: when the authorized frequency of one network is not occupied, the network can be temporarily lent to other networks for use, and the network with the authorized frequency can be called an authorized network; other networks can find frequency holes by detecting the frequency occupied by the air signals, acquire the information of available idle frequencies and then use the available idle frequencies, the network borrowing the frequency can be called a leasing network, and when the network is authorized to occupy the frequency again, the leasing network needs to timely return the borrowed frequency and switch to other idle frequencies, so that the use efficiency of frequency spectrum resources can be improved. The frequency spectrum occupancy rate is the embodiment of effective utilization of frequency spectrum, the frequency channel occupancy rate is that the receiver scans and measures the intensity of frequency signals, and the time proportion that the signals exceed a certain threshold level is determined by utilizing a post-processing mode, so that the occupancy rates of different users are calculated and displayed. The prior art lacks an integration scheme for a frequency spectrum detection result, measurement and statistics of frequency occupancy in a region are inaccurate, and the utilization rate of frequency spectrum resources is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a signal frequency occupation evaluation system and provides a scheme for integrating frequency spectrum detection data.
The technical scheme adopted by the invention is as follows:
a signal frequency occupation evaluation system comprises a frequency management platform and spectrum detection terminals which are respectively arranged aiming at each frequency configuration area of a target frequency band, wherein the spectrum detection terminals are in communication connection with the frequency management platform; wherein,
the frequency management platform comprises a convergence module, an analysis module and a storage module, wherein the convergence module is in communication connection with the analysis module, and the storage module is in communication connection with the analysis module; the frequency spectrum detection terminal is used for carrying out frequency spectrum detection on the frequency configuration area of the targeted target frequency band, acquiring frequency occupation information of the frequency configuration area and reporting the frequency occupation information of the frequency configuration area to the convergence module; the aggregation module is used for summarizing the frequency occupation information reported by each frequency spectrum detection terminal according to a preset time period to obtain target frequency band monitoring data in the preset time period, and sending the target frequency band monitoring data to the analysis module; the analysis module is used for analyzing the target frequency band monitoring data, obtaining frequency occupation assessment information and sending the frequency occupation assessment information to the storage module, the frequency occupation assessment information comprises the frequency occupation number and the frequency occupation rate in the target frequency band in the preset time period, and the storage module is used for storing the frequency occupation assessment information.
Preferably, the frequency management platform further includes a prediction module, which is in communication connection with the storage module and is configured to determine frequency occupancy trend information of the target frequency band in a specified time period according to the frequency occupancy evaluation information stored by the storage module.
Preferably, the frequency management platform further includes an application module, and the application module is in communication connection with the prediction module and the analysis module, respectively, and is configured to display the frequency occupancy assessment information and the frequency occupancy trend information.
Preferably, the frequency occupancy information reported to the convergence module by the spectrum detection terminal includes a terminal ID, a detection time, a detection frequency, and a frequency occupancy of the spectrum detection terminal; the frequency occupation evaluation information and the frequency occupation trend information both comprise a terminal ID of the frequency spectrum detection terminal;
the application module comprises a geographic position information storage unit, a terminal information storage unit, a display information acquisition unit and a display unit, wherein the geographic position information storage unit is used for storing map information, the terminal information storage unit is used for storing a terminal ID of the frequency spectrum detection terminal and corresponding terminal information, the terminal information comprises the geographic position information of the frequency spectrum detection terminal, the display information acquisition unit is used for acquiring the frequency occupation evaluation information and/or the frequency occupation trend information, and the display unit is used for displaying the frequency occupation evaluation information and/or the frequency occupation trend information on a map by combining the geographic position information of the frequency spectrum detection terminal.
Preferably, the summarizing module is further configured to send a configuration command to the spectrum detection terminal, where the configuration command includes a start time, a detection period, and a detection range of spectrum detection; and the frequency spectrum detection terminal is also used for carrying out periodic frequency spectrum detection on the frequency configuration region of the target frequency band in the detection range when the starting time of the frequency spectrum detection is reached according to the configuration command sent by the summarizing module.
Preferably, the system further includes an operation terminal, which is in communication connection with the frequency management platform and is configured to query the frequency management platform for frequency occupancy evaluation information and/or frequency occupancy trend information.
Preferably, the operation terminal is configured to query the frequency occupancy assessment information and/or the frequency occupancy trend information according to a terminal ID, a frequency band, or an area range of the spectrum detection terminal.
Preferably, one or more spectrum detection terminals are respectively arranged in each frequency configuration area of the target frequency band.
The invention has the beneficial effects that:
the invention provides a scheme for integrating frequency spectrum detection data, which is characterized in that frequency spectrum detection terminals are respectively arranged in each frequency configuration area of a target frequency band, the frequency spectrum detection terminals are used for detecting information of frequencies which are in the range and belong to the target frequency band, frequency occupation information is obtained, a frequency management platform is further used for comprehensively analyzing the frequency occupation information acquired by each frequency spectrum detection terminal, frequency occupation evaluation information of the target frequency band in the area range is obtained, the measurement precision of the occupation degree of the target frequency band in the area is improved, furthermore, frequency occupation trend information of the target frequency band in a specified time period can be predicted according to the frequency occupation evaluation information, and the utilization rate of frequency spectrum resources is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a system architecture diagram of a signal frequency occupancy estimation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an application module according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a system architecture diagram of a signal frequency occupation evaluation system according to an embodiment of the present invention, where the signal frequency occupation evaluation system includes a frequency management platform 20 and spectrum detection terminals 10 respectively arranged for each frequency configuration region of a target frequency band, and each spectrum detection terminal 10 is in communication connection with the frequency management platform 20; wherein,
the frequency management platform 20 comprises a convergence module 201, an analysis module 202 and a storage module 203, wherein the convergence module 201 is in communication connection with the analysis module 202, and the storage module 203 is in communication connection with the analysis module 202; the spectrum detection terminal 10 is configured to perform spectrum detection on a frequency configuration region of a target frequency band, obtain frequency occupation information of the frequency configuration region, and report the frequency occupation information of the frequency configuration region to the aggregation module 201; the aggregation module 201 is configured to collect frequency occupation information reported by each spectrum detection terminal 10 according to a preset time period, obtain target frequency band monitoring data in the preset time period, and send the target frequency band monitoring data to the analysis module 202; the analysis module 202 is configured to analyze the target frequency band monitoring data, obtain frequency occupancy assessment information, and send the frequency occupancy assessment information to the storage module 203, where the frequency occupancy assessment information includes the number of frequency occupancies and the frequency occupancy rate in the target frequency band within the preset time period, and the storage module 203 is configured to store the frequency occupancy assessment information.
Preferably, the frequency management platform 20 further includes a prediction module 205, where the prediction module 205 is communicatively connected to the storage module 203, and is configured to determine frequency occupancy trend information of a target frequency band in a specified time period according to the frequency occupancy evaluation information stored in the storage module 203.
Preferably, the frequency management platform 20 further includes an application module 204, and the application module 204 is in communication connection with the prediction module 205 and the analysis module 202, respectively, and is configured to display the frequency occupancy assessment information and the frequency occupancy trend information.
Preferably, the frequency occupancy information reported to the aggregation module 201 by the spectrum detection terminal 10 includes a terminal ID, a detection time, a detection frequency, and a frequency occupancy of the spectrum detection terminal 10; the frequency occupancy evaluation information and the frequency occupancy trend information both include a terminal ID of the spectrum sensing terminal 10;
referring to fig. 2, the application module 204 includes a geographic location information storage unit, a terminal information storage unit, a display information acquisition unit, and a display unit, where the geographic location information storage unit is configured to store map information, the terminal information storage unit is configured to store a terminal ID of the spectrum detection terminal 10 and corresponding terminal information, the terminal information includes geographic location information of the spectrum detection terminal 10, the display information acquisition unit is configured to acquire the frequency occupancy estimation information and/or the frequency occupancy trend information, and the display unit is configured to display the frequency occupancy estimation information and/or the frequency occupancy trend information on a map by combining the geographic location information of the spectrum detection terminal 10.
Preferably, the summarizing module is further configured to send a configuration command to the spectrum sensing terminal 10, where the configuration command includes a start time, a sensing period, and a sensing range of spectrum sensing; the spectrum detection terminal 10 is further configured to perform periodic spectrum detection on a frequency configuration region of a target frequency band within the detection range when the start time of spectrum detection arrives according to the configuration command sent by the aggregation module.
Preferably, the system further includes an operation terminal 30, where the operation terminal 30 is in communication connection with the frequency management platform 20, and is configured to query the frequency management platform 20 for frequency occupancy evaluation information and/or frequency occupancy trend information.
Preferably, the operation terminal 30 is configured to query the frequency occupancy evaluation information and/or the frequency occupancy trend information according to the terminal ID, the frequency band or the area range of the spectrum sensing terminal 10. For example, an operator may access the frequency management platform through the operation terminal, and query the frequency occupancy assessment information and/or the frequency occupancy trend information by using the following operation method.
1) Selecting a monitoring station (namely a spectrum detection terminal): the user can manually select the sites according to the site grouping condition or the user-defined grouping, and the user can also select the sites by adopting administrative districts;
2) selecting and displaying a service frequency band (namely a target frequency band): an operator can display the monitoring coverage range under a certain service frequency band;
3) the function module automatically inquires electromagnetic coverage data of the monitoring station meeting the conditions in the concerned service frequency band from the database, draws a vector graphic rendering layer of monitoring coverage in the geographic information by using an HTML5 Canvas technology, and displays the vector graphic rendering layer through IE.
In this embodiment, common query classifications are listed in different ways, and the main query classifications include: and inquiring the station according to conditions such as key frequency bands, service types/communication systems, station types, area ranges, user-defined inquiry and the like, and displaying the station meeting the conditions in the geographic information. The key frequency bands comprise common frequency modulation broadcast (88MHz-108MHz), a navigation station (108MHz-118MHz), a service communication station (118MHz-138MHz), navigation and radar (960MHz-1215MHz), public security (uplink 351MHz-356MHz, uplink 361MHz-366MHz, data transmission frequency 336MHz-344MHz, data transmission frequency 220MHz-230MHz, single frequency point 140MHz-150MHz), armed police analog and digital clusters (356MHz-357MHz, 366MHz-367MHz), national security department (professional frequency 372MHz-376MHz) and custom key frequency bands; the service types comprise 35 common services such as a fixed service _ spread spectrum communication system, a fixed service _ short wave relay communication system, a fixed service _ microwave relay communication system, a broadcast service _ FM sound broadcast, a land service _ public mobile communication system and the like; the station category includes 31 categories such as 30-1000MHz fixed stations, portable stations, secondary radars, radio stations (television), radio stations (voice), radio stations (multimedia), air radio stations, mobile base stations, handheld stations, satellite fixed service earth stations, and the like; the user-defined inquiry is that an operator can inquire according to known conditions such as station names, station addresses, station setting units, station types, service types, working frequencies, transmitting power and the like; the area query is a special function, and the main function of the area query is to enable a user to directly select a concerned area in the geographic information, and the system can filter the query result and display the stations in the area in the geographic information.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A signal frequency occupation evaluation system is characterized by comprising a frequency management platform and spectrum detection terminals which are respectively arranged aiming at each frequency configuration area of a target frequency band, wherein the spectrum detection terminals are in communication connection with the frequency management platform; wherein,
the frequency management platform comprises a convergence module, an analysis module and a storage module, wherein the convergence module is in communication connection with the analysis module, and the storage module is in communication connection with the analysis module; the frequency spectrum detection terminal is used for carrying out frequency spectrum detection on the frequency configuration area of the targeted target frequency band, acquiring frequency occupation information of the frequency configuration area and reporting the frequency occupation information of the frequency configuration area to the convergence module; the aggregation module is used for summarizing the frequency occupation information reported by each frequency spectrum detection terminal according to a preset time period to obtain target frequency band monitoring data in the preset time period, and sending the target frequency band monitoring data to the analysis module; the analysis module is used for analyzing the target frequency band monitoring data, obtaining frequency occupation assessment information and sending the frequency occupation assessment information to the storage module, the frequency occupation assessment information comprises the frequency occupation number and the frequency occupation rate in the target frequency band in the preset time period, and the storage module is used for storing the frequency occupation assessment information.
2. The signal frequency occupation assessment system according to claim 1, wherein the frequency management platform further comprises a prediction module, the prediction module is communicatively connected to the storage module, and is configured to determine frequency occupation trend information of the target frequency band in a specified time period according to the frequency occupation assessment information stored in the storage module.
3. The signal frequency occupancy assessment system according to claim 2, wherein the frequency management platform further comprises an application module, the application module is communicatively connected to the prediction module and the analysis module respectively, and is configured to display the frequency occupancy assessment information and the frequency occupancy trend information.
4. The system according to claim 3, wherein the frequency occupancy information reported by the spectrum sensing terminal to the aggregation module includes a terminal ID, a sensing time, a sensing frequency, and a frequency occupancy of the spectrum sensing terminal; the frequency occupation evaluation information and the frequency occupation trend information both comprise a terminal ID of the frequency spectrum detection terminal;
the application module comprises a geographic position information storage unit, a terminal information storage unit, a display information acquisition unit and a display unit, wherein the geographic position information storage unit is used for storing map information, the terminal information storage unit is used for storing a terminal ID of the frequency spectrum detection terminal and corresponding terminal information, the terminal information comprises the geographic position information of the frequency spectrum detection terminal, the display information acquisition unit is used for acquiring the frequency occupation evaluation information and/or the frequency occupation trend information, and the display unit is used for displaying the frequency occupation evaluation information and/or the frequency occupation trend information on a map by combining the geographic position information of the frequency spectrum detection terminal.
5. The system according to claim 1, wherein the aggregation module is further configured to send a configuration command to the spectrum sensing terminal, where the configuration command includes a start time, a sensing period, and a sensing range of spectrum sensing; and the frequency spectrum detection terminal is also used for carrying out periodic frequency spectrum detection on the frequency configuration region of the target frequency band in the detection range when the starting time of the frequency spectrum detection is reached according to the configuration command sent by the summarizing module.
6. The system according to claim 1, further comprising an operation terminal communicatively connected to the frequency management platform, for querying the frequency management platform for frequency occupancy evaluation information and/or frequency occupancy trend information.
7. The system according to claim 6, wherein the operation terminal is configured to query the frequency occupancy estimation information and/or the frequency occupancy trend information according to a terminal ID, a frequency band or a region range of the spectrum sensing terminal.
8. The system according to claim 1, wherein one or more spectrum sensing terminals are respectively disposed for each frequency allocation region of the target frequency band.
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| CN201710069681.0A CN106685551A (en) | 2017-02-08 | 2017-02-08 | Signal frequency occupation evaluating system |
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| CN201710069681.0A CN106685551A (en) | 2017-02-08 | 2017-02-08 | Signal frequency occupation evaluating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469560A (en) * | 2018-03-16 | 2018-08-31 | 武汉大学 | A kind of objective complexity evaluation methodology of electromagnetic interference based on quick S-transformation time frequency space model |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110028097A1 (en) * | 2009-07-29 | 2011-02-03 | Gokhan Memik | Hierarchical spectrum sensing for cognitive radios |
| CN102348211A (en) * | 2010-07-28 | 2012-02-08 | 中国移动通信集团公司 | Frequency spectrum detection and frequency allocation system and method |
| CN105375995A (en) * | 2015-10-10 | 2016-03-02 | 南京邮电大学 | Intelligent wireless frequency spectrum online monitoring system and realization method thereof |
| CN106375027A (en) * | 2016-08-31 | 2017-02-01 | 成都九华圆通科技发展有限公司 | Intelligent cloud monitoring system and method for radio |
-
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- 2017-02-08 CN CN201710069681.0A patent/CN106685551A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110028097A1 (en) * | 2009-07-29 | 2011-02-03 | Gokhan Memik | Hierarchical spectrum sensing for cognitive radios |
| CN102348211A (en) * | 2010-07-28 | 2012-02-08 | 中国移动通信集团公司 | Frequency spectrum detection and frequency allocation system and method |
| CN105375995A (en) * | 2015-10-10 | 2016-03-02 | 南京邮电大学 | Intelligent wireless frequency spectrum online monitoring system and realization method thereof |
| CN106375027A (en) * | 2016-08-31 | 2017-02-01 | 成都九华圆通科技发展有限公司 | Intelligent cloud monitoring system and method for radio |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469560A (en) * | 2018-03-16 | 2018-08-31 | 武汉大学 | A kind of objective complexity evaluation methodology of electromagnetic interference based on quick S-transformation time frequency space model |
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