CN111629323B - Tracking and positioning method and device of wireless equipment and storage medium - Google Patents
Tracking and positioning method and device of wireless equipment and storage medium Download PDFInfo
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- CN111629323B CN111629323B CN202010267846.7A CN202010267846A CN111629323B CN 111629323 B CN111629323 B CN 111629323B CN 202010267846 A CN202010267846 A CN 202010267846A CN 111629323 B CN111629323 B CN 111629323B
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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
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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
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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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
- H04W4/029—Location-based management or tracking services
Abstract
The invention discloses a tracking and positioning method, a device and a storage medium of wireless equipment, wherein the method comprises the following steps: acquiring a first parameter index and a second parameter index of a wireless signal currently sent by wireless equipment accessed to the AP; acquiring the position of an antenna sector where the wireless equipment is located according to the first parameter index, the second parameter index and a preset parameter index look-up table; the AP antenna unit comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly acquired through an omnidirectional antenna and a directional parameter index correspondingly acquired through a directional antenna. The invention can improve the positioning precision of the wireless equipment, shorten the decision-making time, reduce the consumption of wireless bandwidth and improve the user experience.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a tracking and positioning method and apparatus for a wireless device, and a computer-readable storage medium.
Background
At present, a wireless network device (e.g., Router/AP) tracks and locates a wireless device (e.g., STA) accessed by the wireless network device, mainly using a static one-dimensional RSSI or other parameter indexes with equivalent functions, and supplemented with other system parameters to represent relative position changes of the STA and the AP, and through the changes of the parameter indexes, after the AP performs decision response according to a specific algorithm, the AP can adaptively adjust antenna configuration when being connected with the STA, so as to adjust polarization, angle and coverage of antenna radiation in real time, so that the STA can still obtain stable and effective wireless connection performance after the position changes.
However, the tracking and positioning schemes used in the prior art generally have the following problems:
(1) the positioning precision is poor, and the motion trail of the STA cannot be accurately distinguished;
(2) positioning the STA only by one-dimensional parameter indexes, and converging the optimal antenna configuration by adjusting the polarization, angle and coverage range of antenna radiation for multiple times, so that the decision time of a positioning algorithm is long and the adjustment speed of the antenna configuration is slow;
(3) antenna switching can directly affect wireless connection performance, and in the adjustment process of antenna configuration, non-objective disturbances such as wireless rate reduction and the like can be caused, and additional wireless bandwidth overhead is required, thereby affecting user experience.
Disclosure of Invention
The technical problem to be solved in the embodiments of the present invention is to provide a tracking and positioning method and apparatus for a wireless device, and a computer-readable storage medium, which can improve positioning accuracy of the wireless device, shorten decision time, reduce wireless bandwidth consumption, and improve user experience.
In order to solve the above technical problem, an embodiment of the present invention provides a tracking and positioning method for a wireless device, including:
acquiring a first parameter index and a second parameter index of a wireless signal currently sent by wireless equipment accessed to the AP;
acquiring the position of an antenna sector where the wireless equipment is located according to the first parameter index, the second parameter index and a preset parameter index lookup table;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly obtained through an omnidirectional antenna and a directional parameter index correspondingly obtained through a directional antenna;
the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index look-up table specifically includes:
comparing the first parameter index, the second parameter index, and each set of parameter indices in the parameter index lookup table;
when the target group parameter indexes are not corresponding to the first parameter indexes and the second parameter indexes, respectively calculating a first difference value between an omnidirectional antenna index and the first parameter index and a second difference value between a directional antenna index and the second parameter index in the target group parameter indexes; wherein the target group parameter index is any group parameter index in the parameter index look-up table;
comparing the magnitude of the first difference value with the magnitude of the second difference value;
and when a third difference between the first difference and the second difference is within a first preset range, determining that the wireless device is located in an antenna sector of the directional antenna corresponding to the target group parameter index.
Further, the method pre-acquires the parameter index lookup table by the following steps:
setting at least one measurement calibration point in an antenna sector of each directional antenna;
respectively acquiring each group of parameter indexes of wireless signals sent by calibration wireless equipment accessed to the AP at each measurement calibration point;
and obtaining the parameter index query table according to the antenna sector where each measurement calibration point is located and each group of correspondingly obtained parameter indexes.
Further, the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index lookup table further includes:
and when the target group parameter index is equal to the first parameter index and the second parameter index, determining that the wireless device is in an antenna sector of the directional antenna corresponding to the target group parameter index.
Further, the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index lookup table further includes:
and when a third difference between the first difference and the second difference is not within a first preset range, determining that the wireless device is not located in an antenna sector of the directional antenna corresponding to the target group parameter index.
Further, the method further comprises:
and acquiring the motion trail of the wireless equipment according to the change rule of the first parameter index and the second parameter index.
Further, the first parameter index is an RSSI value correspondingly acquired by the AP through an omnidirectional antenna; and the second parameter index is an RSSI value correspondingly acquired by the AP through a directional antenna.
In order to solve the above technical problem, an embodiment of the present invention further provides a tracking and positioning apparatus for a wireless device, including:
the system comprises a parameter index acquisition module, a parameter index acquisition module and a parameter index acquisition module, wherein the parameter index acquisition module is used for acquiring a first parameter index and a second parameter index of a wireless signal currently sent by wireless equipment accessed to the AP;
the tracking and positioning module is used for acquiring the position of an antenna sector where the wireless equipment is located according to the first parameter index, the second parameter index and a preset parameter index look-up table;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through an omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through a directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly obtained through an omnidirectional antenna and a directional parameter index correspondingly obtained through a directional antenna;
the tracking and positioning module specifically comprises:
a parameter index comparison unit for comparing the first parameter index, the second parameter index and each set of parameter indexes in the parameter index lookup table;
a second tracking and positioning unit, configured to respectively calculate a first difference between an omnidirectional antenna indicator and the first parameter indicator and a second difference between a directional antenna indicator and the second parameter indicator in a target group of parameter indicators when the target group of parameter indicators is not equal to the first parameter indicator and the second parameter indicator; wherein the target group parameter index is any group of parameter indexes in the parameter index look-up table; comparing the magnitude of the first difference value with the magnitude of the second difference value; and when a third difference between the first difference and the second difference is within a first preset range, determining that the wireless device is located in an antenna sector of the directional antenna corresponding to the target group parameter index.
In order to solve the above technical problem, an embodiment of the present invention further provides a tracking and positioning apparatus for a wireless device, where the apparatus is disposed in an antenna module of the AP; the antenna module comprises an interface unit, an antenna control unit and an antenna unit, wherein the device is arranged in the antenna control unit and is used for realizing the tracking and positioning method of the wireless equipment according to any one of claims 1-6.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; wherein the computer program, when running, controls the device on which the computer readable storage medium is located to execute any one of the above tracking and positioning methods for wireless devices.
An embodiment of the present invention further provides a tracking and positioning apparatus for a wireless device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor implements the tracking and positioning method for a wireless device according to any one of the foregoing descriptions when executing the computer program.
Compared with the prior art, the embodiment of the invention provides a tracking and positioning method and device for wireless equipment and a computer readable storage medium, wherein the position of an antenna sector where the wireless equipment is located is obtained according to a first parameter index, a second parameter index and a preset parameter index look-up table by obtaining the first parameter index and the second parameter index of a wireless signal currently sent by the wireless equipment accessed to the AP; the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly acquired through an omnidirectional antenna and a directional parameter index correspondingly acquired through a directional antenna; the embodiment of the invention can improve the positioning precision of the wireless equipment, shorten the decision-making time, reduce the consumption of wireless bandwidth and improve the user experience.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a method for tracking and locating a wireless device according to the present invention;
FIG. 2 is a schematic diagram of a calibration model of a tracking and positioning method for a wireless device according to the present invention;
FIG. 3 is a block diagram of a preferred embodiment of a tracking and positioning apparatus for a wireless device according to the present invention;
fig. 4 is a block diagram of a preferred embodiment of an antenna module provided by the present invention;
fig. 5 is a block diagram of another preferred embodiment of the tracking and positioning apparatus for wireless devices 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 any inventive step, are within the scope of the present invention.
An embodiment of the present invention provides a tracking and positioning method for a wireless device, which is a flowchart of a preferred embodiment of the tracking and positioning method for a wireless device provided in the present invention, as shown in fig. 1, and the method includes steps S11 to S12:
step S11, acquiring a first parameter index and a second parameter index of a wireless signal currently sent by a wireless device accessed to the AP;
step S12, obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index look-up table;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through an omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through a directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly acquired through an omnidirectional antenna and a directional parameter index correspondingly acquired through a directional antenna.
Specifically, the antenna unit of the AP includes an omnidirectional antenna and N directional antennas, each antenna corresponding to an antenna sector, and correspondingly, one omnidirectional antenna corresponds to one omnidirectional antenna sector, and N directional antennas correspond to N directional antenna sectors; the AP is preset with a parameter index lookup table, the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly acquired through an omnidirectional antenna and a directional parameter index correspondingly acquired through a directional antenna; when wireless equipment (such as a STA and the like) accessing the AP is tracked and positioned, the AP receives a wireless signal sent by the wireless equipment through the omnidirectional antenna and any one directional antenna, analyzes the wireless signal received by the omnidirectional antenna, correspondingly obtains a first parameter index corresponding to the wireless signal, analyzes the wireless signal received by the directional antenna, correspondingly obtains a second parameter index corresponding to the wireless signal, and obtains the position of an antenna sector where the wireless equipment is located according to the obtained first parameter index, the obtained second parameter index and a preset parameter index lookup table, thereby realizing tracking and positioning of the wireless equipment.
In other embodiments, the directional antenna sectors of the N directional antennas together form a 360 ° full coverage sector, and there may be an overlap between adjacent directional antenna sectors.
It should be noted that, the more the number of directional antennas is, the more corresponding directional antenna sectors are, the higher the positioning accuracy is, but the higher the cost is, the higher the complexity of the decision algorithm is, and the more time is, preferably, at least 3 directional antenna sectors are set, each directional antenna sector uses at least one directional antenna, the number of actual directional antenna sectors and the number of directional antennas may be set according to the application requirement, the cost requirement, and other comprehensive factors, and the embodiment of the present invention is not particularly limited.
According to the tracking and positioning method and device for the wireless device and the computer readable storage medium provided by the embodiment of the invention, the first parameter index and the second parameter index of the wireless signal currently sent by the wireless device accessed to the AP are obtained, so that the position of the antenna sector where the wireless device is located is obtained according to the first parameter index, the second parameter index and the preset parameter index lookup table, the positioning precision of the wireless device can be improved, the decision time is shortened, the adjustment speed of the antenna configuration is correspondingly accelerated, the wireless bandwidth consumption can be reduced, and the user experience is improved.
In another preferred embodiment, the method pre-acquires the parameter index look-up table by:
setting at least one measurement calibration point in an antenna sector of each directional antenna;
respectively acquiring each group of parameter indexes of wireless signals sent by calibration wireless equipment accessed to the AP at each measurement calibration point;
and obtaining the parameter index query table according to the antenna sector where each measurement calibration point is located and each group of correspondingly obtained parameter indexes.
Specifically, with reference to the above embodiment, the parameter index lookup table is obtained through testing in advance, and the following description specifically describes, taking a first directional antenna sector of the AP as an example, setting at least one measurement calibration point in the first directional antenna sector, sequentially placing the calibration wireless device at each measurement calibration point of the first directional antenna sector, and performing wireless communication connection with the AP, where the AP sequentially obtains and records each set of parameter indexes (including an omnidirectional parameter index obtained correspondingly through the omnidirectional antenna and a directional parameter index obtained correspondingly through the first directional antenna) of a wireless signal sent by the calibration wireless device at each measurement calibration point of the first directional antenna sector, and it can be understood that other directional antenna sectors correspondingly obtain each directional antenna sector and each set of parameter indexes corresponding to each directional antenna sector in the same processing manner, all the obtained directional antenna sectors and each corresponding group of parameter indexes are collected together, and a parameter index lookup table is correspondingly obtained.
It should be noted that the number of the measurement calibration points may be set according to actual needs, and in order to further improve the positioning accuracy, the greater the number of the measurement calibration points, the better and the denser as possible, so that the measurement calibration points set in each directional antenna sector can cover the center, the boundary, the near end, the far end, and other areas of the corresponding directional antenna sector.
In another preferred embodiment, the obtaining the location of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index, and a preset parameter index lookup table specifically includes:
comparing the first parameter index, the second parameter index, and each set of parameter indices in the parameter index lookup table;
when a target group parameter index is correspondingly equal to the first parameter index and the second parameter index, determining that the wireless device is in an antenna sector of a directional antenna corresponding to the target group parameter index; wherein the target group parameter index is any group of parameter indexes in the parameter index look-up table;
when the target group parameter index is not equal to the first parameter index and the second parameter index, determining the position of the antenna sector where the wireless device is located according to the difference value between the target group parameter index and the first parameter index and the second parameter index.
Specifically, with reference to the foregoing embodiment, when tracking and positioning the wireless device, the first parameter index and the second parameter index obtained through actual measurement are compared with each set of parameter indexes in a preset parameter index lookup table, that is, the first parameter index and the omnidirectional antenna index in each set of parameter indexes are respectively compared, the second parameter index is compared with the directional antenna index in each corresponding set of parameter indexes, when the target set of parameter indexes (that is, a certain set of parameter indexes in the parameter index lookup table) obtained through lookup is equal to the first parameter index and the second parameter index, it is determined that the wireless device is located in the antenna sector of the directional antenna corresponding to the target set of parameter indexes, and when the target set of parameter indexes obtained through lookup is not equal to the first parameter index and the second parameter index (that is, the target set of parameter indexes is not equal to the first parameter index or/and the target set of parameter indexes The directional parameter index in the target group of parameter indexes is not equal to the second parameter index), the position of the antenna sector where the wireless device is located is further determined according to the difference value between the omnidirectional parameter index in the target group of parameter indexes and the first parameter index and the difference value between the directional parameter index in the target group of parameter indexes and the second parameter index.
As an improvement of the above solution, the determining the position of the antenna sector where the wireless device is located according to the difference between the target group parameter index and the first parameter index and the second parameter index specifically includes:
respectively calculating a first difference value of the omnidirectional antenna index and the first parameter index and a second difference value of the directional antenna index and the second parameter index in the target group parameter indexes;
comparing the magnitude of the first difference value with the magnitude of the second difference value;
when a third difference between the first difference and the second difference is within a first preset range, determining that the wireless device is located in an antenna sector of a directional antenna corresponding to the target group parameter index;
and when a third difference between the first difference and the second difference is not within a first preset range, determining that the wireless device is not located in an antenna sector of the directional antenna corresponding to the target group parameter index.
Specifically, with reference to the foregoing embodiment, when the target group parameter index obtained by query is not equal to the first parameter index and the second parameter index, respectively calculating a first difference between an omnidirectional antenna index in the target group parameter index and the first parameter index, and a second difference between a directional antenna index in the target group parameter index and the second parameter index, comparing the magnitudes of the first difference and the second difference obtained by calculation, and calculating a third difference between the first difference and the second difference; when the third difference is within the first preset range (i.e., it indicates that the first difference is equal to or close to the second difference), it is determined that the wireless device is located in the antenna sector of the directional antenna corresponding to the target group parameter index, and when the third difference is not within the first preset range (i.e., it indicates that the first difference is significantly different from the second difference), it is determined that the wireless device is not located in the antenna sector of the directional antenna corresponding to the target group parameter index.
It can be understood that by comparing the first parameter index and the second parameter index with each set of parameter indexes in the parameter index lookup table, it can be determined in which directional antenna sector the wireless device is specifically located, and thus the location of the wireless device can be determined.
In yet another preferred embodiment, the method further comprises:
and acquiring the motion trail of the wireless equipment according to the change rule of the first parameter index and the second parameter index.
Specifically, with reference to the foregoing embodiment, when the first parameter index and the second parameter index are respectively queried and compared with each group of parameter indexes in the parameter index lookup table, the change rule of the first parameter index and the second parameter index may be correspondingly obtained, and as long as the position of the wireless device changes, at least one of the first parameter index and the second parameter index changes, so that the movement track of the wireless device may be determined according to the change rule of the first parameter index and the second parameter index.
In another preferred embodiment, the first parameter index is an RSSI value correspondingly acquired by the AP through an omni-directional antenna; and the second parameter index is an RSSI value correspondingly acquired by the AP through a directional antenna.
Specifically, with reference to the foregoing embodiment, the RSSI value of the wireless signal may be used as a parameter index, and correspondingly, the first parameter index is the RSSI value (which may be denoted as X) corresponding to the wireless signal sent by the wireless device and received by the AP through the omnidirectional antennaRSSI) The second parameter index is an RSSI value (which may be denoted as Y) corresponding to a wireless signal sent by the wireless device and received by the AP through the directional antennaRSSI)。
For example, when tracking and positioning the wireless device, the first parameter index and the second parameter index (X) of the wireless device obtained by actual measurement are measuredRSSI，YRSSI)Measured in factAnd the target group parameter index (X) in the parameter index look-up tableRSSI，YRSSI)CalibrationMaking a comparison when (X)RSSI，YRSSI)Measured actually＝(XRSSI，YRSSI)CalibrationWhen or when (X)RSSI，YRSSI)Measured in factMinus (X)RSSI，YRSSI)CalibrationCorresponding obtained Δ XRSSIAnd Delta YRSSIAnd if the two parameters are equal or close, determining that the wireless equipment is in the antenna sector of the directional antenna corresponding to the target group parameter index, otherwise, determining that the wireless equipment is not in the antenna sector of the directional antenna corresponding to the target group parameter index.
It should be noted that, besides using the RSSI value of the wireless signal as the parameter index, parameters of other functions, such as reflected wave intensity, reflected wave flight time, etc., may also be used as the parameter index, and when using other parameters as the parameter index, the corresponding decision algorithm and the parameter index change rule need to be adjusted accordingly, which is not limited in the embodiment of the present invention. .
Shown in connection with FIG. 2, is based on (X)RSSI，YRSSI) Table 1 shows the motion trajectory of the STA on a certain horizontal plane, and the corresponding antenna configuration decision and antenna action principles, where MARK represents a measurement calibration point, M1 to M9 are measurement calibration points respectively set in the antenna sector in fig. 2, the direction of an arrow in the drawing represents the motion direction of the STA in the antenna sector, and the target directional sector in fig. 2 is used as a target sector, to determine whether the STA enters the target sector, and to determine the specific situation of the antenna decision and the antenna action.
TABLE 1
Note that the antenna operation corresponding to M3 in table 1 indicates: at X obtained by omni-directional antennaRSSIY obtained by directional antenna while being constantRSSIDecreasing means that the STA is moving along the M3 trajectory, i.e., leaving the target sector immediately, and therefore it is necessary to perform the neighboring sector detection Y immediatelyRSSI。
Perform neighbor sector detection YRSSIThe method comprises the following steps: switching the antenna to the directional antenna corresponding to the adjacent sector to obtain the corresponding YRSSIIf Y is obtainedRSSIKnown as XRSSI(is denoted as (X)RSSI，YRSSI)To be determined) With a corresponding (X)RSSI，YRSSI)CalibrationWhen any one of the following two conditions is satisfied: (1) (X)RSSI，YRSSI)To be determinedAnd (X)RSSI，YRSSI)CalibrationEqual; (2) (X)RSSI，YRSSI)CalibrationMinus (X)RSSI，YRSSI)To be determinedObtained Δ XRSSIAnd Delta YRSSIEqual or close, this indicates that the STA did enter the neighboring sector after leaving the target sector.
In addition, since two cases corresponding to M4 and M7 do not exist in practice, and if they occur, they indicate a system abnormality, so M4 and M7 are not labeled in fig. 2.
The embodiment of the present invention further provides a tracking and positioning apparatus for a wireless device, which can implement all processes of the tracking and positioning method for a wireless device described in any of the above embodiments, and the functions and technical effects of each module and unit in the apparatus are respectively the same as those of the tracking and positioning method for a wireless device described in the above embodiment, and are not described herein again.
Referring to fig. 3, it is a block diagram of a preferred embodiment of a tracking and positioning apparatus for wireless devices according to the present invention, the apparatus includes:
a parameter index obtaining module 11, configured to obtain a first parameter index and a second parameter index of a wireless signal currently sent by a wireless device accessing the AP;
a tracking and positioning module 12, configured to obtain, according to the first parameter index, the second parameter index, and a preset parameter index lookup table, a position of an antenna sector where the wireless device is located;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly acquired through an omnidirectional antenna and a directional parameter index correspondingly acquired through a directional antenna.
Preferably, the device further comprises a parameter index look-up table acquisition module; the parameter index look-up table acquisition module is used for:
setting at least one measurement calibration point in an antenna sector of each directional antenna;
respectively acquiring each group of parameter indexes of wireless signals sent by calibration wireless equipment accessed to the AP at each measurement calibration point;
and obtaining the parameter index query table according to the antenna sector where each measurement calibration point is located and each group of correspondingly obtained parameter indexes.
Preferably, the tracking and positioning module 12 specifically includes:
a parameter index comparison unit for comparing the first parameter index, the second parameter index and each group of parameter indexes in the parameter index lookup table;
a first tracking and positioning unit, configured to determine that the wireless device is located in an antenna sector of the directional antenna corresponding to a target group parameter index when the target group parameter index is equal to the first parameter index and the second parameter index; wherein the target group parameter index is any group parameter index in the parameter index look-up table;
a second tracking and positioning unit, configured to determine, when the target group parameter indicator is not equal to the first parameter indicator and the second parameter indicator, a position of an antenna sector where the wireless device is located according to a difference between the target group parameter indicator and the first parameter indicator and between the target group parameter indicator and the second parameter indicator.
Preferably, the second tracking and positioning unit is specifically configured to:
respectively calculating a first difference value of the omnidirectional antenna index and the first parameter index and a second difference value of the directional antenna index and the second parameter index in the target group parameter indexes;
comparing the magnitude of the first difference value with the magnitude of the second difference value;
when a third difference value between the first difference value and the second difference value is within a first preset range, determining that the wireless device is located in an antenna sector of a directional antenna corresponding to the target group parameter index;
and when a third difference between the first difference and the second difference is not within a first preset range, determining that the wireless device is not located in an antenna sector of the directional antenna corresponding to the target group parameter index.
Preferably, the device further comprises a motion trail acquisition module; the motion trail acquisition module is used for:
and acquiring the motion trail of the wireless equipment according to the change rule of the first parameter index and the second parameter index.
Preferably, the first parameter index is an RSSI value correspondingly obtained by the AP through an omnidirectional antenna; and the second parameter index is an RSSI value correspondingly acquired by the AP through a directional antenna.
The embodiment of the present invention further provides a tracking and positioning apparatus for wireless devices, which is a block diagram of a preferred embodiment of an antenna module provided in the present invention, and is shown in fig. 4, where the apparatus is disposed in the antenna module of the AP; the antenna module includes an interface unit, an antenna control unit, and an antenna unit, where the apparatus is disposed in the antenna control unit, and the apparatus is configured to implement the tracking and positioning method for wireless devices according to any of the above embodiments.
Specifically, the antenna module is connected to the AP through an interface unit (e.g., an SMA interface), and the interface unit is connected to the antenna unit through an antenna control unit.
It should be noted that the tracking and positioning apparatus for a wireless device provided in the embodiment of the present invention may be disposed in a controller of a wireless network device such as an AP, or may be disposed in an antenna control unit of an antenna module of the AP, and the embodiment of the present invention is not limited in particular.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; wherein the computer program, when running, controls the device on which the computer-readable storage medium is located to execute the tracking and positioning method for a wireless device according to any of the above embodiments.
An embodiment of the present invention further provides a tracking and positioning apparatus for a wireless device, which is shown in fig. 5 and is a block diagram of another preferred embodiment of the tracking and positioning apparatus for a wireless device provided by the present invention, the apparatus includes a processor 10, a memory 20, and a computer program stored in the memory 20 and configured to be executed by the processor 10, and the processor 10, when executing the computer program, implements the tracking and positioning method for a wireless device according to any of the above embodiments.
Preferably, the computer program can be divided into one or more modules/units (e.g. computer program 1, computer program 2,) which are stored in the memory 20 and executed by the processor 10 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions, the instruction segments describing the execution of the computer program in the apparatus.
The Processor 10 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc., the general purpose Processor may be a microprocessor, or the Processor 10 may be any conventional Processor, the Processor 10 is a control center of the apparatus, and various interfaces and lines are used to connect various parts of the apparatus.
The memory 20 mainly includes a program storage area that may store an operating system, an application program required for at least one function, and the like, and a data storage area that may store related data and the like. In addition, the memory 20 may be a high speed random access memory, may also be a non-volatile memory, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), and the like, or the memory 20 may also be other volatile solid state memory devices.
It should be noted that the above-mentioned apparatus may include, but is not limited to, a processor and a memory, and those skilled in the art will understand that the structural block diagram in fig. 5 is only an example of the above-mentioned apparatus, and does not constitute a limitation of the apparatus, and may include more or less components than those shown in the figure, or may combine some components, or different components.
To sum up, the tracking and positioning method, device and computer readable storage medium for wireless device provided by the embodiments of the present invention have the following advantages:
(1) improving the positioning precision by inquiring (X) in the table according to the preset parameter indexRSSI，YRSSI)CalibrationThe direction of motion causing the change in RSSI of the STA can be identified;
(2) the algorithm has shorter decision time and faster antenna adjustment speed, as shown in table 1, the decision and action of the antenna are very clear, and particularly, in the change mode corresponding to M9, unnecessary RSSI detection of adjacent sectors can be avoided, and the adjustment of the polarization, angle and coverage of antenna radiation each time is really realized for configuration convergence;
(3) the wireless bandwidth overhead is reduced, compared with the prior art, the method can effectively reduce non-objective disturbance such as wireless rate reduction caused by antenna switching on the premise of low cost, and therefore user experience is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for tracking and locating a wireless device, comprising:
acquiring a first parameter index and a second parameter index of a wireless signal currently sent by wireless equipment accessed to the AP;
acquiring the position of an antenna sector where the wireless equipment is located according to the first parameter index, the second parameter index and a preset parameter index look-up table;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly obtained through an omnidirectional antenna and a directional parameter index correspondingly obtained through a directional antenna;
the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index look-up table specifically includes:
comparing the first parameter index, the second parameter index, and each set of parameter indices in the parameter index lookup table;
when the target group parameter indexes are not correspondingly equal to the first parameter index and the second parameter index, respectively calculating a first difference value between an omnidirectional antenna index and the first parameter index and a second difference value between a directional antenna index and the second parameter index in the target group parameter indexes; wherein the target group parameter index is any group of parameter indexes in the parameter index look-up table;
comparing the magnitude of the first difference with the magnitude of the second difference;
and when a third difference value between the first difference value and the second difference value is within a first preset range, determining that the wireless device is located in an antenna sector of the directional antenna corresponding to the target group parameter index.
2. The method for tracking and locating a wireless device according to claim 1, wherein the method pre-retrieves the parameter index look-up table by:
setting at least one measurement calibration point in an antenna sector of each directional antenna;
respectively acquiring each group of parameter indexes of wireless signals sent by calibration wireless equipment accessed to the AP at each measurement calibration point;
and obtaining the parameter index query table according to the antenna sector where each measurement calibration point is located and each group of correspondingly obtained parameter indexes.
3. The method for tracking and positioning a wireless device according to claim 1, wherein the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index look-up table further comprises:
and when the target group parameter index is equal to the first parameter index and the second parameter index, determining that the wireless device is in an antenna sector of the directional antenna corresponding to the target group parameter index.
4. The method for tracking and positioning a wireless device according to claim 1, wherein the obtaining the position of the antenna sector where the wireless device is located according to the first parameter index, the second parameter index and a preset parameter index look-up table further comprises:
and when a third difference between the first difference and the second difference is not within a first preset range, determining that the wireless device is not located in an antenna sector of the directional antenna corresponding to the target group parameter index.
5. The method for tracking and locating a wireless device as recited in claim 1, further comprising:
and acquiring the motion trail of the wireless equipment according to the change rule of the first parameter index and the second parameter index.
6. The method according to any of claims 1 to 5, wherein the first parameter index is an RSSI value correspondingly acquired by the AP through an omnidirectional antenna; and the second parameter index is an RSSI value correspondingly acquired by the AP through a directional antenna.
7. An apparatus for tracking and locating a wireless device, comprising:
the system comprises a parameter index acquisition module, a parameter index acquisition module and a parameter index acquisition module, wherein the parameter index acquisition module is used for acquiring a first parameter index and a second parameter index of a wireless signal currently sent by wireless equipment accessed to the AP;
the tracking and positioning module is used for acquiring the position of an antenna sector where the wireless equipment is located according to the first parameter index, the second parameter index and a preset parameter index lookup table;
the antenna unit of the AP comprises an omnidirectional antenna and N directional antennas, wherein each antenna corresponds to an antenna sector, and N is more than or equal to 2; the first parameter index is correspondingly obtained by the AP through the omnidirectional antenna, and the second parameter index is correspondingly obtained by the AP through the directional antenna; the parameter index lookup table comprises a plurality of groups of parameter indexes, and each group of parameter indexes comprises an omnidirectional parameter index correspondingly obtained through an omnidirectional antenna and a directional parameter index correspondingly obtained through a directional antenna;
the tracking and positioning module specifically comprises:
a parameter index comparison unit for comparing the first parameter index, the second parameter index and each set of parameter indexes in the parameter index lookup table;
a second tracking and positioning unit, configured to, when a target group parameter index is not equal to the first parameter index and the second parameter index, respectively calculate a first difference between an omnidirectional antenna index and the first parameter index and a second difference between a directional antenna index and the second parameter index in the target group parameter index; wherein the target group parameter index is any group parameter index in the parameter index look-up table; comparing the magnitude of the first difference value with the magnitude of the second difference value; and when a third difference value between the first difference value and the second difference value is within a first preset range, determining that the wireless device is located in an antenna sector of the directional antenna corresponding to the target group parameter index.
8. The tracking and positioning device of the wireless equipment is characterized in that the device is arranged in an antenna module of the AP; the antenna module comprises an interface unit, an antenna control unit and an antenna unit, wherein the device is arranged in the antenna control unit and is used for realizing the tracking and positioning method of the wireless equipment according to any one of claims 1-6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program; wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the tracking and positioning method of the wireless apparatus according to any one of claims 1 to 6.
10. An apparatus for tracking and locating a wireless device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements a method for tracking and locating a wireless device as recited in any one of claims 1-6.
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