CN114520951B - Pseudo base station positioning method and device - Google Patents
Pseudo base station positioning method and device Download PDFInfo
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- CN114520951B CN114520951B CN202011304004.0A CN202011304004A CN114520951B CN 114520951 B CN114520951 B CN 114520951B CN 202011304004 A CN202011304004 A CN 202011304004A CN 114520951 B CN114520951 B CN 114520951B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention provides a pseudo base station positioning method and device, wherein the method comprises the following steps: determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations; dividing a target detection area into a plurality of unit areas; selecting one unit area from a plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected; adjusting the reference signal transmitting power of each target base station so that the reference signal receiving power of the unit area to be detected is smaller than a preset threshold value; determining the TAU times of the user terminal in the unit area to be detected in the later time period, and calculating the increment value of the TAU times of the user terminal in the later time period relative to the user terminal in the previous time period; and if the increment value is greater than a preset frequency threshold, determining that the pseudo base station is in the unit area to be detected. The embodiment of the invention can improve the positioning efficiency and the positioning precision of the pseudo base station.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a pseudo base station positioning method and device.
Background
The fake base station, also called fake base station, is one illegal radio communication equipment with the defect of global system for mobile communication (GSM) one-way certification, and consists of mainly main machine and notebook computer, and can search GSM mobile telephone information in certain radius range with the main machine as center and is usually set in automobile or in hidden place for transmission.
When the pseudo base stations operate, serious interference is generated to the network of an operator, network experience of surrounding users is affected, and with the progress of communication technology, the number of the pseudo base stations is increased, so that the pseudo base stations are one of the non-negligible network problems. If the pseudo base station does not have the parameters configured in cooperation with the background of the operator, the network is also affected, and when the terminal is accessed, the illegal pseudo base station is likely to illegally collect user information data in the coverage area, so that great threat is caused to user privacy.
Currently, the positioning of the pseudo base station depends on the daily network pull test of the related technicians and the complaint treatment of the users, or the related technicians use the position update signaling and the base station switching failure signaling to position the pseudo base station. However, the above method can only be performed when a problem is found, and is very inefficient and inaccurate in positioning.
Disclosure of Invention
The embodiment of the invention provides a pseudo base station positioning method and device, which are used for solving the technical problems of low pseudo base station positioning efficiency and inaccurate positioning precision in the prior art.
In a first aspect, an embodiment of the present invention provides a method for positioning a pseudo base station, including:
determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations;
dividing the target detection area into a plurality of unit areas;
selecting one unit area from the plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected;
adjusting the reference signal transmitting power of each target base station so that the reference signal receiving power of the unit area to be detected is smaller than a preset threshold value;
respectively extracting the updating TAU times of the tracking area of the user terminal in the unit area to be detected in a first time period and a second time period, and calculating the difference value of the TAU times of the user terminal in the first time period and the second time period, wherein the duration of the first time period and the duration of the second time period are the same, and the second time period is after the first time period;
if the difference value is larger than the preset frequency threshold value, determining that the pseudo base station is in the unit area to be detected; otherwise, determining that the pseudo base station is not in the unit area to be detected.
Optionally, the method further comprises:
and taking each unit area in the plurality of unit areas as a new unit area to be detected in sequence until the position of the pseudo base station in the whole target detection area is reached.
Optionally, adjusting the azimuth of each target base station includes:
determining azimuth angle values when the sector coverage direction of each target base station points to the unit area to be detected;
judging whether the unit area to be detected is in the lobe coverage range of sector antennas of the target base stations or not, and adjusting the azimuth angle of each target base station according to the judging result and the azimuth angle value.
Optionally, the determining the azimuth value when the sector coverage direction of each target base station points to the unit area to be detected includes:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected and a first formula, calculating to obtain an azimuth value when the sector coverage direction of each target base station points to the unit area to be detected, wherein the first formula is as follows:
wherein x is u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b And respectively representing the abscissa and the ordinate of the target base station, wherein theta represents the azimuth angle when the sector coverage direction of the target base station points to the unit area to be detected.
Optionally, determining whether the unit area to be detected is within the lobe coverage range of the sector antennas of the plurality of target base stations, and adjusting the azimuth angle of each target base station according to the determination result and the azimuth angle value includes:
determining the azimuth angle after the adjustment of the target base station according to the horizontal lobe width of the sector antenna of the target base station, the azimuth angle before the adjustment of the sector of the target base station and a second formula, wherein the second formula is as follows:
wherein θ b Indicating azimuth angle, θ, before sector adjustment rl Horizontal lobe width, θ, representing sector antenna of target base station a Indicating the adjusted azimuth angle of the target base station.
Optionally, before the adjusting the reference signal transmission power of each target base station, the method further includes:
and determining a value of the reference signal transmitting power of each target base station when the reference signal receiving power of the unit area to be detected is smaller than the preset threshold according to a wireless signal propagation model, so as to adjust the reference signal transmitting power of each target base station according to the value of the reference signal transmitting power of each target base station.
Optionally, determining, according to a wireless signal propagation model, a value of reference signal transmitting power of each target base station when the reference signal receiving power of the unit area to be detected is smaller than the preset threshold value, includes:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected, the wireless signal propagation model and a third formula, calculating to obtain the value of the reference signal transmitting power of each target base station, wherein the third formula is as follows:
P r ＝f(P t ，d)
wherein f (P t D) is represented by P t Radio signal propagation model with d as main parameter, P t Representing the reference signal transmitting power of the target base station, d representing the side length of the unit area to be detected, and P r Indicating the reference signal received power, x, of the unit area to be detected u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b Respectively representing the abscissa and the ordinate of the target base station.
In a second aspect, an embodiment of the present invention provides a pseudo base station positioning apparatus, including:
the determining module is used for determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations;
a dividing module for dividing the target detection area into a plurality of unit areas;
the adjusting module is used for selecting one unit area from the plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected;
the adjusting module is further configured to adjust reference signal transmitting power of each target base station, so that reference signal receiving power of the unit area to be detected is smaller than a preset threshold;
the extraction module is used for respectively extracting the tracking area updating TAU times of the user terminal in the unit area to be detected in a first time period and a second time period, and calculating the TAU times difference value of the user terminal in the first time period and the second time period, wherein the duration of the first time period and the duration of the second time period are the same, and the second time period is after the first time period;
the positioning module is used for determining that the pseudo base station is in the unit area to be detected when the difference value is larger than a preset frequency threshold value; otherwise, determining that the pseudo base station is not in the unit area to be detected.
In a third aspect, an embodiment of the present invention provides an electronic device, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes the computer-executable instructions stored by the memory, such that the at least one processor performs the pseudo base station positioning method as described above in the first aspect and the various possible designs of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium, where computer executable instructions are stored, when executed by a processor, to implement the pseudo base station positioning method according to the first aspect and the various possible designs of the first aspect.
The method and the device for positioning the pseudo base station provided by the embodiment of the invention are characterized in that a target detection area surrounded by a plurality of target base stations is determined; then dividing the target detection area into a plurality of unit areas; and each unit area in the plurality of unit areas is sequentially used as a unit area to be detected, and whether the pseudo base station is in the unit area to be detected is judged, so that the positioning precision of the pseudo base station is improved. And the sector of each target base station covers the unit area to be detected by adjusting the azimuth angle of each target base station; then adjusting the reference signal transmitting power of each target base station to enable the reference signal receiving power of the unit area to be detected to be smaller than a preset threshold value; determining the TAU times of the user terminal in the unit area to be detected in the later time period, and calculating the increment value of the TAU times of the user terminal in the later time period relative to the user terminal in the previous time period; if the increment value is greater than the preset frequency threshold value, the pseudo base station is determined to be in the unit area to be detected, so that the positioning efficiency of the pseudo base station is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is an application scenario diagram of a pseudo base station positioning method according to an embodiment of the present invention;
fig. 2 is a flowchart of a pseudo base station positioning method according to an embodiment of the present invention;
fig. 3 is a flowchart of a pseudo base station positioning method according to another embodiment of the present invention;
fig. 4 is an application scenario diagram of a pseudo base station positioning method according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a pseudo base station positioning device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the related art, the signals of the pseudo base stations generate serious interference to the network of the operator, which affects the network experience of the surrounding users, and the number of the pseudo base stations is increased along with the increasing progress of the communication technology, which is one of the non-negligible network problems. If the pseudo base station does not have the parameters configured in cooperation with the background of the operator, the network is also affected, and when the terminal is accessed, the illegal pseudo base station is likely to illegally collect user information data in the coverage area, so that great threat is caused to user privacy. At present, the positioning of the pseudo base station depends on daily network drawing test and complaint treatment, and can only be treated in a punctiform manner when a problem is found, so that the efficiency is very low, the mode is relatively passive, and the problem cannot be comprehensively solved. In addition, there are also methods for locating the pseudo base station by using the tracking area update signaling and the handover failure signaling, in which the method for locating the pseudo base station by simply obtaining the location update signaling initiated by the terminal to the network after the terminal is separated from the influence of the pseudo base station can only locate the tracking area, the location accuracy is insufficient, the method for locating the pseudo base station by using the handover failure signaling also has difficulty in screening out the problem caused by the source of the pseudo base station, the location efficiency of looking at the pseudo base station as a whole is very low, and the location accuracy is inaccurate.
Aiming at the defect, the technical conception provided by the application is as follows: a target detection area surrounded by a plurality of target base stations is determined; then dividing the target detection area into a plurality of unit areas; and each unit area in the plurality of unit areas is sequentially used as a unit area to be detected, and whether the pseudo base station is in the unit area to be detected is judged, so that the positioning precision of the pseudo base station is improved. And the sector of each target base station covers the unit area to be detected by adjusting the azimuth angle of each target base station; then adjusting the reference signal transmitting power of each target base station to enable the reference signal receiving power of the unit area to be detected to be smaller than a preset threshold value; determining the number of tracking area updates (Tracking Area Update, TAU) of the user terminal in the unit area to be detected in a later time period, and calculating an increment value of the number of TAU of the user terminal in the later time period relative to the previous time period; if the increment value is greater than the preset frequency threshold value, the pseudo base station is determined to be in the unit area to be detected, so that the positioning efficiency of the pseudo base station is improved.
Fig. 1 is a flow application scenario diagram of a pseudo base station positioning method according to an embodiment of the present invention.
As shown in fig. 1, the basic architecture of the application scenario provided in this embodiment mainly includes: a server 101, a plurality of base stations 102, and a plurality of pseudo base stations 103 distributed in the coverage area of the plurality of base stations; the server is used for locating the positions of the plurality of pseudo base stations according to the related data.
Fig. 2 is a flow chart of a pseudo base station positioning method according to an embodiment of the present invention, and an execution body of the method according to the embodiment may be a server in the embodiment shown in fig. 1.
As shown in fig. 2, the method provided in this embodiment may include the following steps.
S201, determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations.
Specifically, an area surrounded by several current network 4G base stations is selected, for example, several current network 4G base stations are selected, and then several base stations are used as endpoints, and several endpoints are connected in turn, so as to enclose a target detection area.
In a possible embodiment, a point is randomly selected as the origin O of coordinates in the target detection area, and preferably, a rectangular plane coordinate system xOy with the direction of the east-west axis x and the direction of the north axis y is defined in m, and the coordinates (x b1 ，y b1 )、(x b2 ，y b2 )、 (x b3 ，y b3 )、……。
S202, dividing the target detection area into a plurality of unit areas.
Specifically, the side length of the unit area is determined as d, the area is longitudinally cut by taking the side length d of the unit area as an interval from the original point of the coordinate system, the area is transversely cut by taking the side length d of the unit area as an interval from the ordinate, the whole area is divided into a plurality of small areas with the side length d and the area d multiplied by d, and each small area d multiplied by d is one unit area.
S203, selecting one unit area from the plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected.
Specifically, the unit region at the top left of the rectangular coordinate system is first selected, and the center point coordinate is (x) u ，y u ) And adjusting the azimuth angle of the directional sector in the coverage area of the 4G base station of the corner of the whole target detection area to ensure that the selected unit area is in the coverage area of the sectors.
S204, adjusting the reference signal transmitting power of each target base station so that the reference signal receiving power of the unit area to be detected is smaller than a preset threshold.
In particular, the method comprises the steps of,and calculating the power of each corner base station sector when the unit area to be detected forms weak coverage according to the wireless signal propagation model, wherein the weak coverage means that the reference signal received power RSRP of the unit area to be detected is smaller than a preset threshold value. Then, the network manager adjusts the power parameters of each sector to the calculated power values to make the unit area show weak coverage, assuming that the reference signal transmitting power of a certain sector is P t The received power of the reference signal received by the center point of the unit area to be detected is P r The coordinates of the center point of the unit area to be detected in the rectangular coordinate system are (x u ，y u ) The coordinates of the base station where the sector is located are (x b ，y b ) The distance from the sector antenna to the center point of the received unit area is d, P r The calculation formula of (2) is as follows:
P r ＝f(P t ，d)
wherein f (P) t D) is represented by P t D is a wireless signal propagation model of the main parameter.
Taking the LEE macrocell model as an example, P r ＝P r1 +(-γ)d+α 0 Wherein, gamma is a distance attenuation factor, P r1 In a specific city, when the base station antenna is a half-wavelength antenna and the high and transmitting power are specific values, the receiving power at 1km is alpha 0 In order to correct the factor of the correction,
wherein h is t 、P t 、G t Respectively the actual base station antenna height, the transmitting power and the antenna gain, h tREF 、P tREF 、G tREF Respectively measure P r1 And the base station antenna height, the transmitting power and the antenna gain at gamma, assuming that the RSRP threshold value of the selected unit area reaching the weak coverage standard is P rth Substituting it into P r ＝f(P t The following equation is available in d):
P rth ＝f(P t ，d)
solving the equation to obtain the reference signal transmitting power P required to be adjusted by the corresponding base station sector t 。
S205, updating TAU times of the tracking area of the user terminal in the unit area to be detected in a first time period and a second time period are respectively extracted, and calculating a TAU time difference value of the user terminal in the first time period and the second time period, wherein the time duration of the first time period and the time duration of the second time period are the same, and the second time period is after the first time period.
S206, if the difference value is larger than a preset frequency threshold value, determining that the pseudo base station is in the unit area to be detected; otherwise, determining that the pseudo base station is not in the unit area to be detected.
Specifically, the network manager is utilized to count the number of times that the re-accessed sector is the user TAU covering each corner base station sector of the unit area to be detected when the terminal initiates TAU, and the number of times that the sectors are accessed in the same time before is compared, if the increment is greater than the threshold value n TA The pseudo base station can be positioned in the unit area if the increment is not greater than the threshold n TA No pseudo base station exists in this area.
Further, the method provided in this embodiment further includes: and taking each unit area in the plurality of unit areas as a new unit area to be detected in sequence until the position of the pseudo base station in the whole target detection area is reached.
Specifically, the next unit area to be detected is reselected according to the principle from left to right and from top to bottom, and then according to the steps S203 to S206, whether a pseudo base station exists in the new unit area to be detected is obtained, until the unit area in the whole area is traversed, the position of the pseudo base station in the whole area can be located.
Fig. 3 is a flowchart of a pseudo base station positioning method according to another embodiment of the present invention, and the embodiment is based on the embodiment shown in fig. 2, and the pseudo base station positioning method is described in detail by using a specific example.
As shown in fig. 3, the method provided in this embodiment may include the following steps.
S301, determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations.
Specifically, a target detection area surrounded by several current network 4G base stations is selected, a point is randomly selected as a coordinate origin O in the area, and preferably, the coordinates of each corner base station are determined by using a plane rectangular coordinate system xOy with the positive east direction as a horizontal axis x and the positive north direction as a vertical axis y, and the unit is m.
Exemplary, as shown in FIG. 4, a triangle area surrounded by 3 4G base stations is selected, and coordinates of the 3 base stations on the corners in a coordinate system are determined to be (x b1 ，y b1 )、(x b2 ，y b2 )、(x b3 ，y b3 )。
S302, dividing the target detection area into a plurality of unit areas.
Specifically, the unit area side length is set to d, and illustratively, the unit area side length is set to 50m, the area is cut longitudinally by taking the unit area side length as an interval from the original point of the coordinate system on the abscissa, the area is cut transversely by taking the unit area side length as an interval on the ordinate, the whole area is divided into a plurality of small areas with the side length of 50m and the area of 50m×50m, and the cut image is shown in fig. 4.
S303, selecting one unit area from the plurality of unit areas as a unit area to be detected, and determining an azimuth value when the sector coverage direction of each target base station points to the unit area to be detected.
Specifically, a unit area which is not traversed is selected according to the principle from left to right and from top to bottom, and the coordinates of the central point of the unit area are (x) u ，y u ) The azimuth angles θ when the sectors in the directions of the coverage areas of the base stations at the corners of the area are right opposite to the coverage to the unit area 401 to be detected are calculated by the following calculation formulas:
wherein x is b 、y b Base station fan with cornerThe coordinates of the base station where the zone is located are (x) b1 ，y b1 )、(x b2 ，y b2 )、(x b3 ，y b3 ) … …, exemplary, coordinates are (x b1 ，y b1 ) To the left of the center point of the selected unit area
The first unit area to be detected is 402 in fig. 4, and the last unit area to be detected is 403 in fig. 4.
S304, judging whether the unit area to be detected is within the lobe coverage range of sector antennas of the plurality of target base stations, and adjusting the azimuth angle of each target base station according to the judging result and the azimuth angle value, so that the sector of each target base station covers the unit area to be detected.
Specifically, whether the selected unit area is within the lobe coverage area of the sector 4G antenna of the corner base station is judged, then the azimuth angle of the sector is adjusted according to the situation, and the azimuth angle theta is adjusted a The following are provided:
wherein θ b Azimuth angle, θ, before sector adjustment rl Is the horizontal lobe width of the sector antenna of the 4G base station. Exemplary, the horizontal lobe width of the 4G antenna is 60 DEG, the azimuth angle θ before adjustment b When the difference between the azimuth angle theta and the azimuth angle theta facing the selected unit area exceeds 30 DEG, the previous antenna coverage direction is not satisfied with the selected unit area, and the azimuth angle of the antenna is adjusted to be theta facing the selected unit area.
S305, adjusting the reference signal transmitting power of each target base station so that the reference signal receiving power of the unit area to be detected is smaller than a preset threshold.
Specifically, the power of each corner base station sector when the selected unit area forms weak coverage is calculated according to the wireless signal propagation model, and the network management is utilizedThe power parameters of each sector are adjusted to the calculated power values, so that the unit area presents weak coverage, and the reference signal transmitting power of one sector is assumed to be P t The received reference signal received power RSRP of the central point of the selected unit area is P r The center point of the selected unit area has a coordinate in a rectangular coordinate system of (x u ，y u ) The coordinates of the base station where the sector is located are (x b ，y b ) The distance from the sector antenna to the center point of the received unit area is d, P r The calculation formula of (2) is as follows:
P r ＝f(P t ，d)
wherein f (P t D) is represented by P t The radio signal propagation model with d as the main parameter assumes that the RSRP threshold value of the selected unit area reaching the weak coverage standard is P rth Substituting it into P r ＝f(P t The following equation is available in d):
P rth ＝f(P t ，d)
solving the equation to obtain the reference signal transmitting power P required to be adjusted by the corresponding base station sector t 。
Exemplary, P rth At-115 dBm, P is implemented by using LEE macro-cellular model r ＝P r1 +(-γ)d+α 0 Wherein, gamma is a distance attenuation factor, P r1 In a specific city, when the base station antenna is a half-wavelength antenna and the high and transmitting power are specific values, the receiving power at 1km is alpha 0 In order to correct the factor of the correction,
wherein h is t 、P t 、G t Respectively the actual base station antenna height, the transmitting power and the antenna gain, h tREF 、P tREF 、G tREF Respectively measure P r1 And the base station antenna height, the transmit power and the antenna gain at gamma, the coordinates (x) b1 ，y b1 ) P corresponding to the sector of the base station rth ＝f(P t The equation of d) is as follows:
solving the equation yields a coordinate (x b1 ，y b1 ) The reference signal transmission power of the sector of the base station needs to be adjusted to a power value P t The method comprises the following steps:
s306, respectively extracting the tracking area updating TAU times of the user terminal in the unit area to be detected in a first time period and a second time period, and calculating the TAU times difference value of the user terminal in the first time period and the second time period, wherein the duration of the first time period and the duration of the second time period are the same, and the second time period is after the first time period; if the difference value is larger than the preset frequency threshold value, determining that the pseudo base station is in the unit area to be detected; otherwise, determining that the pseudo base station is not in the unit area to be detected.
Specifically, the network manager is utilized to count the number of times that the re-accessed sector is the user TAU covering each corner base station sector of the selected unit area when the terminal initiates TAU, and the number of times that the sectors are accessed in the same time before is compared, and the increment is larger than the threshold n TA When the pseudo base station is located in the unit area, the pseudo base station can be located. Exemplary, the statistical duration is 1 hour, threshold n TA If the number of the TAUs of the user exceeds 100 in 100,1 hour, the number of the TAUs exceeds 100 in the same time, the existence of the pseudo base station in the unit area can be determined, and if the number of the TAUs of the user is not more than 100, the pseudo base station does not exist in the unit area.
S307, judging whether the unit area to be detected is the last unit area in the whole area, if not, jumping to S303, and selecting the next unit area to be detected; if yes, the process is ended, and the position of the pseudo base station in the whole target detection area can be positioned.
In this embodiment, a target detection area surrounded by a plurality of target base stations is determined; then dividing the target detection area into a plurality of unit areas; and each unit area in the plurality of unit areas is sequentially used as a unit area to be detected, and whether the pseudo base station is in the unit area to be detected is judged, so that the positioning precision of the pseudo base station is improved. And the sector of each target base station covers the unit area to be detected by adjusting the azimuth angle of each target base station; then adjusting the reference signal transmitting power of each target base station to enable the reference signal receiving power of the unit area to be detected to be smaller than a preset threshold value; determining the TAU times of the user terminal in the unit area to be detected in the later time period, and calculating the increment value of the TAU times of the user terminal in the later time period relative to the user terminal in the previous time period; if the increment value is greater than the preset frequency threshold value, the pseudo base station is determined to be in the unit area to be detected, so that the positioning efficiency of the pseudo base station is improved.
Fig. 5 is a schematic structural diagram of a pseudo base station positioning device according to an embodiment of the present invention.
As shown in fig. 5, the apparatus provided in this embodiment includes: a determining module 501, a dividing module 502, an adjusting module 503, an extracting module 504 and a positioning module 505; the determining module 501 is configured to determine a target detection area, where the target detection area is an area surrounded by a plurality of target base stations; a dividing module 502, configured to divide the target detection area into a plurality of unit areas; an adjustment module 503, configured to select one unit area from the plurality of unit areas as a unit area to be detected, and adjust an azimuth angle of each target base station, so that a sector of each target base station covers the unit area to be detected; the adjusting module is further configured to adjust reference signal transmitting power of each target base station, so that reference signal receiving power of the unit area to be detected is smaller than a preset threshold; an extracting module 504, configured to extract the number of times of updating TAU in the tracking area of the user terminal in the unit area to be detected in a first period of time and a second period of time, and calculate a difference value between the number of times of TAU in the user terminal in the second period of time and the first period of time, where the duration of the first period of time and the second period of time are the same and the second period of time is after the first period of time; the positioning module 505 is configured to determine that the pseudo base station is in the unit area to be detected when the difference value is greater than a preset frequency threshold; otherwise, determining that the pseudo base station is not in the unit area to be detected.
Further, the device further comprises: the adjustment module is also used for: and taking each unit area in the plurality of unit areas as a new unit area to be detected in sequence until the position of the pseudo base station in the whole target detection area is reached.
Further, the adjusting module is specifically configured to:
determining azimuth angle values when the sector coverage direction of each target base station points to the unit area to be detected;
judging whether the unit area to be detected is in the lobe coverage range of sector antennas of the target base stations or not, and adjusting the azimuth angle of each target base station according to the judging result and the azimuth angle value.
Further, the adjusting module is specifically configured to:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected and a first formula, calculating to obtain an azimuth value when the sector coverage direction of each target base station points to the unit area to be detected, wherein the first formula is as follows:
wherein x is u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b And respectively representing the abscissa and the ordinate of the target base station, wherein theta represents the azimuth angle when the sector coverage direction of the target base station points to the unit area to be detected.
Further, the adjusting module is specifically configured to:
determining the azimuth angle after the adjustment of the target base station according to the horizontal lobe width of the sector antenna of the target base station, the azimuth angle before the adjustment of the sector of the target base station and a second formula, wherein the second formula is as follows:
wherein θ b Indicating azimuth angle, θ, before sector adjustment r1 Horizontal lobe width, θ, representing sector antenna of target base station a Indicating the adjusted azimuth angle of the target base station.
Further, the adjusting module is specifically configured to:
and determining a value of the reference signal transmitting power of each target base station when the reference signal receiving power of the unit area to be detected is smaller than the preset threshold according to a wireless signal propagation model, so as to adjust the reference signal transmitting power of each target base station according to the value of the reference signal transmitting power of each target base station.
Further, the adjusting module is specifically configured to:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected, the wireless signal propagation model and a third formula, calculating to obtain the value of the reference signal transmitting power of each target base station, wherein the third formula is as follows:
P r ＝f(P t ，d)
wherein f (P t D) is represented by P t Radio signal propagation model with d as main parameter, P t Representing the reference signal transmitting power of the target base station, d representing the side length of the unit area to be detected, and P r Indicating the reference signal received power, x, of the unit area to be detected u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b Respectively representing the abscissa and the ordinate of the target base station.
The device provided in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein again.
Fig. 6 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention. As shown in fig. 6, the electronic device 60 of the present embodiment includes: a processor 601 and a memory 602; wherein the method comprises the steps of
A memory 602 for storing computer-executable instructions;
the processor 601 is configured to execute computer-executable instructions stored in the memory to implement the steps performed by the network coverage problem identification method in the above embodiment. Reference may be made in particular to the relevant description of the embodiments of the method described above.
Alternatively, the memory 602 may be separate or integrated with the processor 601.
When the memory 602 is provided separately, the electronic device further comprises a bus 603 for connecting said memory 602 and the processor 601.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and when a processor executes the computer execution instructions, the pseudo base station positioning method is realized.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.
In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.
The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or processor to perform some of the steps of the methods described in various embodiments of the present application.
It should be understood that the above processor may be a central processing unit (Central Processing Unit, abbreviated as CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, abbreviated as DSP), application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.
The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component Interconnect, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A pseudo base station positioning method, comprising:
determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations;
dividing the target detection area into a plurality of unit areas, wherein the unit area is determined as follows: dividing the target detection area into a plurality of small block areas with side length d and area d multiplied by d, wherein each small block area d multiplied by d is a unit area;
selecting one unit area from the plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected;
adjusting the reference signal transmitting power of each target base station so that the reference signal receiving power of the unit area to be detected is smaller than a preset threshold value;
respectively extracting the updating TAU times of the tracking area of the user terminal in the unit area to be detected in a first time period and a second time period, and calculating the difference value of the TAU times of the user terminal in the first time period and the second time period, wherein the duration of the first time period and the duration of the second time period are the same, and the second time period is after the first time period;
if the difference value is larger than the preset frequency threshold value, determining that the pseudo base station is in the unit area to be detected; otherwise, determining that the pseudo base station is not in the unit area to be detected.
2. The method as recited in claim 1, further comprising:
and taking each unit area in the plurality of unit areas as a new unit area to be detected in sequence until the position of the pseudo base station in the whole target detection area is reached.
3. The method of claim 2, wherein adjusting the azimuth of each target base station comprises:
determining azimuth angle values when the sector coverage direction of each target base station points to the unit area to be detected;
judging whether the unit area to be detected is in the lobe coverage range of sector antennas of the target base stations or not, and adjusting the azimuth angle of each target base station according to the judging result and the azimuth angle value.
4. The method of claim 3, wherein determining an azimuth value for each target base station when the sector coverage direction of the target base station points to the unit area to be detected comprises:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected and a first formula, calculating to obtain an azimuth value when the sector coverage direction of each target base station points to the unit area to be detected, wherein the first formula is as follows:
wherein x is u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b And respectively representing the abscissa and the ordinate of the target base station, wherein theta represents the azimuth angle when the sector coverage direction of the target base station points to the unit area to be detected.
5. The method of claim 4, wherein determining whether the unit area to be detected is within a lobe coverage of sector antennas of the plurality of target base stations, and adjusting an azimuth of each target base station based on the determination and the azimuth value, comprises:
determining the azimuth angle after the adjustment of the target base station according to the horizontal lobe width of the sector antenna of the target base station, the azimuth angle before the adjustment of the sector of the target base station and a second formula, wherein the second formula is as follows:
wherein θ b Indicating azimuth angle, θ, before sector adjustment rl Horizontal lobe width, θ, representing sector antenna of target base station a Indicating the adjusted azimuth angle of the target base station.
6. The method of claim 1, wherein prior to said adjusting the reference signal transmit power for each target base station, the method further comprises:
and determining a value of the reference signal transmitting power of each target base station when the reference signal receiving power of the unit area to be detected is smaller than the preset threshold according to a wireless signal propagation model, so as to adjust the reference signal transmitting power of each target base station according to the value of the reference signal transmitting power of each target base station.
7. The method of claim 6, wherein determining the value of the reference signal transmit power for each target base station such that the reference signal received power for the unit area to be detected is less than the preset threshold according to the wireless signal propagation model comprises:
according to the coordinates of each target base station, the coordinates of the central point of the unit area to be detected, the wireless signal propagation model and a third formula, calculating to obtain the value of the reference signal transmitting power of each target base station, wherein the third formula is as follows:
P r ＝f(P t ,d)
wherein f (P t D) is represented by P t Radio signal propagation model with d as main parameter, P t Representing the reference signal transmitting power of the target base station, and d represents the side length of the unit area to be detected，P r Indicating the reference signal received power, x, of the unit area to be detected u 、y u Respectively representing the abscissa and the ordinate of the central point of the unit area to be detected, and x b 、y b Respectively representing the abscissa and the ordinate of the target base station.
8. A pseudo base station positioning apparatus, comprising:
the determining module is used for determining a target detection area, wherein the target detection area is an area surrounded by a plurality of target base stations;
a dividing module, configured to divide the target detection area into a plurality of unit areas, where the unit area is determined in the following manner: dividing the target detection area into a plurality of small block areas with side length d and area d multiplied by d, wherein each small block area d multiplied by d is a unit area;
the adjusting module is used for selecting one unit area from the plurality of unit areas as a unit area to be detected, and adjusting the azimuth angle of each target base station so that the sector of each target base station covers the unit area to be detected;
the adjusting module is further configured to adjust reference signal transmitting power of each target base station, so that reference signal receiving power of the unit area to be detected is smaller than a preset threshold;
the extraction module is used for respectively extracting the tracking area updating TAU times of the user terminal in the unit area to be detected in a first time period and a second time period, and calculating the TAU times difference value of the user terminal in the first time period and the second time period, wherein the duration of the first time period and the duration of the second time period are the same, and the second time period is after the first time period;
the positioning module is used for determining that the pseudo base station is in the unit area to be detected when the difference value is larger than a preset frequency threshold value; otherwise, determining that the pseudo base station is not in the unit area to be detected.
9. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the pseudo base station positioning method as claimed in any one of claims 1 to 7.
10. A computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement the pseudo base station positioning method according to any of claims 1 to 7.
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