CN109474893B - Mobile terminal positioning method and device and computer equipment - Google Patents
Mobile terminal positioning method and device and computer equipment Download PDFInfo
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- CN109474893B CN109474893B CN201811621860.1A CN201811621860A CN109474893B CN 109474893 B CN109474893 B CN 109474893B CN 201811621860 A CN201811621860 A CN 201811621860A CN 109474893 B CN109474893 B CN 109474893B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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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 provides a positioning method and device of a mobile terminal and computer equipment. The positioning method of the mobile terminal provided by the invention periodically queries the international mobile subscriber identification code of the target mobile terminal; acquiring a power margin value reported by a target mobile terminal; determining an uplink path loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal; and positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for positioning a mobile terminal, and a computer device.
[ background of the invention ]
In the prior art, when a base station locates a mobile terminal, a main method is to implement location by measuring a Reference Signal Receiving Power (RSRP) reported by a mobile phone, or by measuring a Signal-to-NOISE RATIO (SNR)/Received Signal Strength Index (RSSI) value obtained by measuring an uplink Signal by the base station.
For active positioning products, for example, a portable base station, a mobile base station and other mobile base stations, the mobile base station can actively transmit signals outwards, attract the mobile terminal (such as a mobile phone) to update the position of the mobile base station, and further measure the relative distance between the mobile terminal and a target mobile phone through parameter information carried in an uplink measurement report signaling. The user can carry the mobile base station to continuously move, and the relative distance between the user and the target mobile phone is judged based on the change of RSRP/RSSI/SNR.
However, in the R10 protocol, it is specified that measurement is not reported before security activation, but a mobile base station accessed by a mobile phone cannot be activated safely, so the mobile base station cannot acquire RSRP in mobile phone measurement report, and a method of positioning with RSRP is no longer feasible. The SNR/RSSI positioning method has the problem of being not sensitive enough to change with distance in many scenarios.
Aiming at the technical problem that the mobile phone is not accurately positioned based on the change of RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology, an effective solution is not provided at present.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method and an apparatus for positioning a mobile terminal, and a computer device, so as to solve the technical problem in the related art that positioning of a mobile phone is not accurate enough based on changes of RSSI/SNR when RSRP in a measurement report of the mobile phone cannot be obtained.
In one aspect, an embodiment of the present invention provides a method for positioning a mobile terminal, including: periodically inquiring the international mobile subscriber identification code of the target mobile terminal; acquiring a power margin value reported by a target mobile terminal; determining an uplink path loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal; and positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
As described in the foregoing aspect and any possible implementation manner, there is further provided an implementation manner, where in a case that a target base station is a mobile base station, a step of locating a target mobile terminal according to an uplink loss value includes: the method comprises the steps that when the movable base station is located at each of a plurality of positions, the movable base station receives a power margin value reported by a target mobile terminal; determining an uplink loss value of the movable base station under the condition of being at a corresponding position based on the difference value between the maximum transmitting power value and each received power margin value; and determining the relative position relationship between the target mobile terminal and the movable base station according to the uplink path loss values obtained when the movable base station is at a plurality of positions.
As described in the foregoing aspect and any possible implementation manner, there is further provided an implementation manner, where in a case that a target base station is a tdd base station, a step of positioning a target mobile terminal according to an uplink loss value includes: determining a downlink path loss value according to the uplink path loss value; determining reference signal receiving power according to the downlink path loss value and the reference signal power; and positioning the target mobile terminal according to the reference signal receiving power.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, wherein the step of determining the uplink loss value according to the maximum transmission power value and the power headroom value of the target mobile terminal includes: determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmitting power value, the power margin value and the number of the resource blocks transmitted by the target mobile terminal; and determining an uplink loss value according to the average power and the signal-to-noise ratio of the uplink channel.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, before obtaining the power headroom value reported by the target mobile terminal, the method further includes: and configuring the number of the resource blocks transmitted to the target mobile terminal to be a specified value by the target base station.
In the foregoing aspect and any possible implementation manner, there is further provided an implementation manner, wherein the step of determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmission power value, the power headroom value, and the number of resource blocks transmitted by the target mobile terminal adopts the following formula: PWR/RB ═ P _ MAX-PHR-10 log (UL _ PRB); determining an uplink path loss value according to the average power and the signal-to-noise ratio of an uplink channel, wherein the following formula is adopted: PL ═ PWR/RB-SNR-p (n); where PWR/RB is an average power represented by a logarithm, P _ MAX is a maximum transmission power value represented by a logarithm, PHR is a power margin value represented by a logarithm, UL _ PRB is the number of resource blocks, PL is an uplink loss value represented by a logarithm, SNR is a signal-to-noise ratio represented by a logarithm, and P (n) is a noise power value represented by a logarithm.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, before obtaining the power headroom value reported by the target mobile terminal, the method further includes: and configuring the reporting period of the power margin value to be the minimum value through the target base station.
One of the above technical solutions has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
In another aspect, an embodiment of the present invention provides a positioning apparatus for a mobile terminal, including: an inquiry unit for periodically inquiring the international mobile subscriber identity of the target mobile terminal; the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a power margin value reported by a target mobile terminal; a determining unit, configured to determine an uplink loss value according to a maximum transmission power value and a power margin value of a target mobile terminal; and the positioning unit is used for positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
In accordance with the above-described aspect and any possible implementation manner, there is further provided an implementation manner, in a case where the target base station is a mobile base station, the positioning unit includes: the mobile base station comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a power margin value reported by a target mobile terminal received by the mobile base station when the mobile base station is at each of a plurality of positions; a first determining module, configured to determine, based on a difference between the maximum transmit power value and each received power headroom value, an uplink loss value of the mobile base station when the mobile base station is located at the corresponding position; and the second determining module is used for determining the relative position relationship between the target mobile terminal and the movable base station according to the uplink path loss values obtained under the condition that the movable base station is at a plurality of positions.
In the foregoing aspect and any possible implementation manner, there is further provided an implementation manner, where the target base station is a time division duplex base station, and the positioning unit includes: the third determining module is used for determining a downlink path loss value according to the uplink path loss value; a fourth determining module, configured to determine a reference signal received power according to the downlink path loss value and the reference signal power; and the positioning module is used for positioning the target mobile terminal according to the reference signal receiving power.
The above-described aspect and any possible implementation further provide an implementation, where the determining unit includes: a fifth determining module, configured to determine, according to the maximum transmit power value, the power margin value, and the number of resource blocks transmitted by the target mobile terminal, an average power of each resource block transmitted by the target mobile terminal; and the sixth determining module is used for determining the uplink path loss value according to the average power and the signal-to-noise ratio of the uplink channel.
The above-described aspects and any possible implementation further provide an implementation, where the apparatus further includes: the first configuration unit is used for configuring the number of resource blocks sent to the target mobile terminal to be a specified value each time through the target base station before acquiring the power headroom value reported by the target mobile terminal.
The above-described aspect and any possible implementation further provide an implementation, and the fifth determining module uses the following formula: PWR/RB ═ P _ MAX-PHR-10 log (UL _ PRB); the sixth determination module employs the following equation: PL ═ PWR/RB-SNR-p (n); where PWR/RB is an average power represented by a logarithm, P _ MAX is a maximum transmission power value represented by a logarithm, PHR is a power margin value represented by a logarithm, UL _ PRB is the number of resource blocks, PL is an uplink loss value represented by a logarithm, SNR is a signal-to-noise ratio represented by a logarithm, and P (n) is a noise power value represented by a logarithm.
The above-described aspects and any possible implementation further provide an implementation, where the apparatus further includes: and the second configuration unit is used for configuring the reporting period of the power headroom value to be the minimum value through the target base station before the power headroom value reported by the target mobile terminal is acquired.
One of the above technical solutions has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
In another aspect, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for positioning a mobile terminal according to the embodiment of the present invention is implemented.
One of the above technical solutions has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
In another aspect, an embodiment of the present invention further provides a storage medium, where the storage medium includes a computer readable instruction, and when the computer reads and executes the computer readable instruction, the computer is caused to execute the method for positioning a mobile terminal according to the embodiment of the present invention.
One of the above technical solutions has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic flowchart of an alternative positioning method for a mobile terminal according to an embodiment of the present invention;
FIG. 2 is a block diagram of a computer device according to an embodiment of the present invention;
FIG. 3 is a flow chart of a mobile base station periodically querying a target mobile terminal according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an alternative positioning apparatus for a mobile terminal according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that although the terms first, second, third, etc. may be used in the claims, description and drawings of the present invention to distinguish between similar objects XXX, it should be understood that the terms first, second, third, etc. are not necessarily used to describe a particular order or sequence, but are merely used to distinguish these similar objects XXX from one another. For example, a first XXX may also be referred to as a second XXX, and similarly, a second XXX may also be referred to as a first XXX, without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Aiming at the technical problem that the mobile phone is not accurately positioned based on the change of RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology in the prior art, the embodiment of the invention provides the following solution thought: periodically inquiring the international mobile subscriber identification code of the target mobile terminal; acquiring a power margin value reported by a target mobile terminal; determining an uplink path loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal; and positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
Under the guidance of this idea, the present embodiment provides the following feasible embodiments.
The embodiment of the invention provides a positioning method of a mobile terminal.
Specifically, please refer to fig. 1, which is a schematic flow chart of a selectable positioning method of a mobile terminal according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
102, acquiring a power margin value reported by a target mobile terminal;
103, determining an uplink loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal;
and 104, positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
Alternatively, the target base station may be a mobile base station, e.g., a portable base station, etc.
It should be noted that the execution subject of steps 101 to 104 may be a positioning apparatus of the mobile terminal, and the apparatus may be an application located in a local terminal, where the local terminal may be the target base station itself or one of the constituent devices of the target base station. Alternatively, the positioning apparatus of the mobile terminal may also be a functional unit such as a plug-in or Software Development Kit (SDK) located in an application of the local terminal, which is not particularly limited in this embodiment of the present invention. It should be understood that the application may be an application program (native app) installed on the terminal, or may also be a web page program (webApp) of a browser on the terminal, which is not limited in this embodiment of the present invention.
As shown in fig. 2, taking the above-mentioned local terminal as an example of a computer device, a computer device provided in an embodiment of the present invention includes a memory 21, a processor 22, and a computer program stored in the memory 21 and executable on the processor 22, and when the processor 22 executes the computer program, the method for positioning a mobile terminal according to any of the foregoing embodiments is implemented.
Optionally, the mobile terminal according to the embodiment of the present invention may include, but is not limited to, a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, an MP3 player, an MP4 player, and the like.
The following explains the steps 101 to 104 further by taking the embodiment of the present invention as an example executed by a functional module of a mobile base station as follows:
after the Mobile terminal accesses the Mobile base station through the Attach procedure signaling or Tracking Area Update (TAU), the Mobile base station may determine whether the Mobile terminal is a target Mobile terminal that needs to be located through an International Mobile Subscriber identity Number (IMSI) of the Mobile terminal.
If the mobile base station determines that the target mobile terminal is the target mobile terminal, step 101 is executed to periodically query the international mobile subscriber identity of the target mobile terminal to maintain communication with the target mobile terminal and keep the target mobile terminal "on-line". Specifically, as shown in fig. 3, the mobile base station periodically queries the international mobile subscriber Identity (imsi) of the target mobile station through an Identity query Request (Identity Request), and the mobile phone periodically sends an Identity Response (Identity Response) in Response to the mobile base station, so as to maintain the communication connection between the target mobile station and the mobile base station.
For example, when a preset period PHR timer reaches a period or when a path loss change is large, the target mobile terminal is triggered to actively report the PHR, so that the mobile base station can obtain the Power Headroom value reported by the target mobile terminal.
After obtaining the power margin value of the target mobile terminal, the mobile base station may determine the uplink path loss value according to the maximum transmission power value and the power margin value of the target mobile terminal. The uplink loss value is a loss value of an uplink, the uplink refers to a link transmitted by the mobile terminal and received by the base station, and the loss of the uplink is positively correlated with the distance between the mobile terminal and the base station.
Optionally, the step of determining the uplink loss value according to the maximum transmission power value and the power margin value of the target mobile terminal may be implemented as follows: determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmitting power value, the power margin value and the number of the resource blocks transmitted by the target mobile terminal; and determining an uplink loss value according to the average power and the signal-to-noise ratio of the uplink channel.
The number of resource blocks transmitted by the target mobile terminal can be configured by the target base station, and in order to make the measurement result more accurate, the number of resource blocks transmitted to the target mobile terminal each time can be configured to be a specified value by the target base station before the power margin value reported by the target mobile terminal is acquired.
The present embodiment further provides an optional implementation manner, where before the power headroom value reported by the target mobile terminal is obtained, the reporting period of the power headroom value is configured to be the minimum value by the target base station. The optional implementation mode can minimize the time interval between two power margin values reported by the target mobile terminal, and improve the measurement efficiency.
Optionally, the step of determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmission power value, the power margin value, and the number of resource blocks transmitted by the target mobile terminal may adopt the following formula: PWR/RB ═ P _ MAX-PHR-10 log (UL _ PRB) (equation 1); the step of determining the uplink loss value according to the average power and the signal-to-noise ratio of the uplink channel may use the following formula: PL ═ PWR/RB-SNR-p (n) (equation 2); where PWR/RB is an average power per Resource Block (RB) expressed by a logarithm, P _ MAX is a maximum transmission power value expressed by a logarithm, PHR is a power margin value expressed by a logarithm, UL _ PRB is the number of Resource blocks, PL is an uplink loss value expressed by a logarithm, SNR is a signal-to-noise ratio expressed by a logarithm, and P (n) is a noise power value expressed by a logarithm.
Optionally, when the target base station is a Time Division Duplex (TDD) base station, the uplink and downlink channels are symmetric, the uplink path loss value is approximately equal to the downlink path loss value, and further, the downlink path loss value can be determined by the uplink path loss value, and then the Reference Signal Receiving Power (RSRP) is determined according to the downlink path loss value and the Reference Signal Power (RSP), where the Reference Signal Power is broadcast by the base station and known to both the base station and the target mobile terminal; and then, after the reference signal receiving power is determined, positioning the target mobile terminal according to the reference signal receiving power.
In the case where the target base station is a mobile base station, the position of the mobile base station may be moved, and uplink loss values at a plurality of positions may be measured, thereby relating the relative position between the target mobile terminal and the mobile base station.
For example, in the above optional implementation manner provided in this embodiment, when the step 104 is executed to locate the target mobile terminal according to the uplink loss value, the following specific steps are executed:
step 201, obtaining a power margin value reported by a target mobile terminal received by a mobile base station when the mobile base station is at each of a plurality of positions;
step 202, determining an uplink path loss value of the mobile base station under the condition of being at a corresponding position based on the difference value between the maximum transmitting power value and each received power margin value;
step 203, determining the relative position relationship between the target mobile terminal and the mobile base station according to the uplink loss values obtained when the mobile base station is at a plurality of positions.
The positioning method of the mobile terminal of the embodiment of the invention at least has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
The following describes the above embodiments with reference to a specific application scenario in which a portable base station locates a mobile phone supporting a 3GPP Release 10 protocol (Release 10, abbreviated as R10) or a version of the above protocol, as follows:
step 1, establishing direct connection between a target mobile phone and a mobile base station, and keeping the target mobile phone online:
since the R10 protocol version begins to stipulate that measurement reporting is not performed before security activation, RSRP of the target mobile phone cannot be acquired, so that the target mobile phone can be kept "on-line", and the base station performs positioning by calculating an uplink loss value.
Specifically, the mobile phone accesses the mobile base station through Attach/TAU, the mobile base station judges whether a target mobile phone needs to be positioned after acquiring the IMSI of the mobile phone, if so, the IMSI of the mobile phone is periodically inquired, and the mobile phone periodically sends an Identity Response, so that the connection between the target mobile phone and the mobile base station is maintained.
Step 2, the base station calculates the path loss value (uplink path loss value) of the uplink channel, and judges the relative distance between the target mobile phone and the base station according to the path loss value:
the mobile phone triggers the PHR when the periodic PHR timer reaches a period or the path loss changes greatly, so the base station can calculate the path loss value according to the PHR reported by the mobile phone, the calculation formulas are formula 1 and formula 2, and it should be noted that the values calculated by formula 1 and formula 2 are both logarithmic values.
After calculating the PL value, the user can determine the relative distance to the target handset by observing the change in PL by continuously moving the portable base station. Since the variation of RSRP/RSSI/SNR with distance is that the value is smaller when the distance is farther, and the value is larger when the distance is farther, the PL may not conform to the usage habit of the user, so the PL may be converted and reported to the background, and an optional implementation formula is: PL (new) ═ PL (max) -PL. The scaled PL (new) trend with distance is consistent with RSRP/RSSI/SNR. In order to avoid the situation that the PL fluctuates severely, the PL can be subjected to smoothing operation processing and then reported to the background.
In order to make the PL value calculated by the base station more accurate, the number of PRBs allocated for uplink scheduling may be fixed. According to the formula 1, the uplink path loss calculation is related to the number of the RB allocated to the uplink, so that the number of the allocated RB is fixed, the calculated PL value can reflect the distance change more accurately relative to the change, and the fluctuation can be reduced.
In addition, the reporting period of the PHR can be set to a minimum value. According to formula 1, the uplink path loss calculation is related to the PHR, so that the base station can update the PHR in time, and the calculated PL looks more sensitive along with the distance change.
For the TDD base station, RSRP may be calculated according to the uplink loss value:
for example, according to a calculation formula of Physical Uplink Shared Channel (PUSCH) transmission power of the 3GPP protocol: p _ pusch (i) ═ min { P _ CMAX,10log (M _ pusch (i)) + P _ O _ pusch (j)) + alpha (j) PL + Delta _ tf (i)) + f (i);
wherein PL is the downlink path loss, and the calculation method comprises the following steps: PL-RSRP.
Therefore, RSRP is PL (downlink) -RSP
For TDD, uplink and downlink channels may be considered symmetric, and PL (downlink) may be considered as PL (uplink).
Therefore, RSRP is PL (uplink) -RSP
Since the base station has already calculated the PL (uplink) in the positioning process, the RSP is broadcast by the base station in the sib2 and is known to both the base station and the handset, the RSRP of the handset can be calculated according to the above formula, so that the positioning measurement value can be consistent with that of the handset supporting the R8 protocol.
The problem that mobile phones of R10 and above cannot report measurement can be solved by positioning by using the path loss value, and the sensitivity of the method is higher relative to the change of RSSI/SNR along with the distance. And for the TDD mobile phone, the RSRP can be further calculated by utilizing the uplink path loss value, so that the reported values of all the mobile phones are uniform, and the measurement data can be conveniently processed by a background.
Based on the positioning method of the mobile terminal provided by the embodiment of the invention, the embodiment of the invention further provides an embodiment of a device for realizing the steps and the method in the embodiment of the method.
Please refer to fig. 4, which is a functional block diagram of an alternative positioning apparatus of a mobile terminal according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes: the system comprises an inquiry unit 10, an acquisition unit 20, a determination unit 30 and a positioning unit 40, wherein the inquiry unit is used for periodically inquiring the international mobile subscriber identity of a target mobile terminal; the acquisition unit is used for acquiring a power margin value reported by a target mobile terminal; the determining unit is used for determining an uplink loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal; the positioning unit is used for positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
As an optional implementation manner of this embodiment, in the case that the target base station is a mobile base station, the positioning unit includes: the mobile base station comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a power margin value reported by a target mobile terminal received by the mobile base station when the mobile base station is at each of a plurality of positions; a first determining module, configured to determine, based on a difference between the maximum transmit power value and each received power headroom value, an uplink loss value of the mobile base station when the mobile base station is located at the corresponding position; and the second determining module is used for determining the relative position relationship between the target mobile terminal and the movable base station according to the uplink path loss values obtained under the condition that the movable base station is at a plurality of positions.
As an optional implementation manner of this embodiment, in a case that the target base station is a tdd base station, the positioning unit includes: the third determining module is used for determining a downlink path loss value according to the uplink path loss value; a fourth determining module, configured to determine a reference signal received power according to the downlink path loss value and the reference signal power; and the positioning module is used for positioning the target mobile terminal according to the reference signal receiving power.
As an optional implementation manner of this embodiment, the determining unit includes: a fifth determining module, configured to determine, according to the maximum transmit power value, the power margin value, and the number of resource blocks transmitted by the target mobile terminal, an average power of each resource block transmitted by the target mobile terminal; and the sixth determining module is used for determining the uplink path loss value according to the average power and the signal-to-noise ratio of the uplink channel.
As an optional implementation manner of this embodiment, the apparatus further includes: the first configuration unit is used for configuring the number of resource blocks sent to the target mobile terminal to be a specified value each time through the target base station before acquiring the power headroom value reported by the target mobile terminal.
As an optional implementation manner of this embodiment, the fifth determining module adopts the following formula: PWR/RB ═ P _ MAX-PHR-10 log (UL _ PRB); the sixth determination module employs the following equation: PL ═ PWR/RB-SNR-p (n); where PWR/RB is an average power represented by a logarithm, P _ MAX is a maximum transmission power value represented by a logarithm, PHR is a power margin value represented by a logarithm, UL _ PRB is the number of resource blocks, PL is an uplink loss value represented by a logarithm, SNR is a signal-to-noise ratio represented by a logarithm, and P (n) is a noise power value represented by a logarithm.
As an optional implementation manner of this embodiment, the apparatus further includes: and the second configuration unit is used for configuring the reporting period of the power headroom value to be the minimum value through the target base station before the power headroom value reported by the target mobile terminal is acquired.
Since each unit in this embodiment can execute the positioning method of the mobile terminal shown in fig. 1, reference may be made to the related description of the corresponding embodiment in fig. 1 for a part of this embodiment that is not described in detail.
The positioning device of the mobile terminal of the embodiment of the invention at least has the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
It can be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiment may be implemented by instructing the relevant hardware through a program, where the program may be stored in a computer-readable storage medium, and the computer can further execute the positioning method of the mobile terminal provided by the embodiment of the present invention by reading the program in the storage medium.
Accordingly, an embodiment of the present invention further provides a storage medium, where the storage medium of the embodiment of the present invention includes computer readable instructions, and when the computer reads and executes the computer readable instructions, the computer is caused to execute the following steps: periodically inquiring the international mobile subscriber identification code of the target mobile terminal; acquiring a power margin value reported by a target mobile terminal; determining an uplink path loss value according to the maximum transmitting power value and the power margin value of the target mobile terminal; and positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal.
The storage medium of the embodiment of the invention has at least the following beneficial effects:
the communication connection with the target mobile terminal is maintained by periodically inquiring the international mobile subscriber identity of the target mobile terminal, so that the power margin value reported by the target mobile terminal is further obtained, the uplink loss value can be determined according to the maximum transmitting power value and the power margin value of the target mobile terminal, and the target mobile terminal can be positioned according to the uplink loss value. The technical problem that the mobile phone is not accurately positioned based on the change of the RSSI/SNR under the condition that the RSRP in the mobile phone measurement report can not be obtained in the related technology is solved, and the effect of more accurately determining the distance between the mobile phone and the base station through the uplink path loss value can be achieved.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A positioning method of a mobile terminal, wherein the method comprises the following steps:
periodically inquiring the international mobile subscriber identification code of the target mobile terminal;
acquiring a power margin value reported by the target mobile terminal;
determining an uplink path loss value according to the maximum transmitting power value of the target mobile terminal and the power margin value;
positioning the target mobile terminal according to the uplink path loss value, wherein the uplink path loss value is positively correlated with the distance between the target base station and the target mobile terminal;
the step of determining an uplink loss value according to the maximum transmission power value of the target mobile terminal and the power margin value includes:
determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmitting power value, the power margin value and the number of the resource blocks transmitted by the target mobile terminal;
determining the uplink path loss value according to the average power and the signal-to-noise ratio of an uplink channel;
in a case where the target base station is a tdd base station, the step of locating the target mobile terminal according to the uplink loss value includes:
determining a downlink path loss value according to the uplink path loss value;
determining reference signal receiving power according to the downlink path loss value and the reference signal power;
and positioning the target mobile terminal according to the reference signal receiving power.
2. The method of claim 1, wherein, in the case that the target base station is a mobile base station, the step of locating the target mobile terminal according to the uplink loss value comprises:
acquiring a power margin value reported by the target mobile terminal received by the movable base station when the movable base station is at each of a plurality of positions;
determining an uplink loss value of the movable base station under the condition of being at a corresponding position based on the difference value between the maximum transmitting power value and each received power margin value;
and determining the relative position relationship between the target mobile terminal and the movable base station according to the uplink path loss values obtained when the movable base station is at a plurality of positions.
3. The method of claim 1, wherein before obtaining the power headroom value reported by the target mobile terminal, the method further comprises: and configuring the number of the resource blocks sent to the target mobile terminal to be a designated value each time through the target base station.
4. The method of claim 1, wherein the step of determining the average power of each resource block transmitted by the target mobile terminal according to the maximum transmission power value, the power headroom value and the number of resource blocks transmitted by the target mobile terminal uses the following formula:
PWR/RB＝P_MAX–PHR-10log(UL_PRB)；
the step of determining the uplink path loss value according to the average power and the signal-to-noise ratio of the uplink channel adopts the following formula:
PL＝PWR/RB–SNR-P(N)；
wherein PWR/RB is the average power expressed by a logarithm, P _ MAX is the maximum transmission power value expressed by a logarithm, PHR is the power headroom value expressed by a logarithm, UL _ PRB is the number of the resource blocks, PL is the uplink loss value expressed by a logarithm, SNR is the signal-to-noise ratio expressed by a logarithm, and P (n) is a noise power value expressed by a logarithm.
5. The method of claim 1, wherein before the obtaining the power headroom value reported by the target mobile terminal, the method further comprises:
and configuring the reporting period of the power margin value to be the minimum value through the target base station.
6. A positioning apparatus of a mobile terminal, wherein the apparatus comprises:
an inquiry unit for periodically inquiring the international mobile subscriber identity of the target mobile terminal;
an obtaining unit, configured to obtain a power headroom value reported by the target mobile terminal;
a determining unit, configured to determine an uplink path loss value according to the maximum transmission power value of the target mobile terminal and the power margin value;
a positioning unit, configured to position the target mobile terminal according to the uplink loss value, where the uplink loss value is positively correlated to a distance between a target base station and the target mobile terminal;
the positioning unit includes:
the third determining module is used for determining a downlink path loss value according to the uplink path loss value;
a fourth determining module, configured to determine a reference signal received power according to the downlink path loss value and the reference signal power;
the positioning module is used for positioning the target mobile terminal according to the reference signal receiving power;
the determination unit includes:
a fifth determining module, configured to determine, according to the maximum transmit power value, the power margin value, and the number of resource blocks transmitted by the target mobile terminal, an average power of each resource block transmitted by the target mobile terminal;
and the sixth determining module is used for determining the uplink path loss value according to the average power and the signal-to-noise ratio of the uplink channel.
7. The apparatus of claim 6, wherein in the case where the target base station is a mobile base station, the positioning unit comprises:
an obtaining module, configured to obtain a power headroom value, reported by the target mobile terminal, received by the mobile base station when the mobile base station is located at each of a plurality of positions;
a first determining module, configured to determine, based on a difference between the maximum transmit power value and each received power headroom value, an uplink loss value of the mobile base station when the mobile base station is located at a corresponding position;
and the second determining module is used for determining the relative position relationship between the target mobile terminal and the movable base station according to the uplink path loss values obtained when the movable base station is at a plurality of positions.
8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the method according to any of claims 1 to 5 is implemented when the computer program is executed by the processor.
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