CN113298985A - RSSI-based digital key unlocking terminal positioning method and system - Google Patents
RSSI-based digital key unlocking terminal positioning method and system Download PDFInfo
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- CN113298985A CN113298985A CN202110606715.1A CN202110606715A CN113298985A CN 113298985 A CN113298985 A CN 113298985A CN 202110606715 A CN202110606715 A CN 202110606715A CN 113298985 A CN113298985 A CN 113298985A
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- 238000004891 communication Methods 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 9
- 230000006870 function Effects 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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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
- H04W4/025—Services making use of location information using location based information parameters
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Abstract
In order to achieve the purpose, the invention discloses a positioning method and a positioning system of a digital key unlocking terminal based on RSSI (received signal strength indicator), wherein the unlocking terminal is used for establishing communication connection with a controlled terminal through a wireless signal so as to change the working state of an electronic lock arranged on the controlled terminal, and the positioning method comprises the following steps: detecting whether the communication connection is established between the unlocking terminal and the controlled terminal, if so, monitoring data of a data channel of the unlocking terminal by the controlled terminal according to the connection parameters, and calculating a signal intensity value of the acquired data signal; calculating the position of the unlocking terminal according to a plurality of signal strength values acquired by the controlled terminal; because the controlled terminal monitors the data channel of the unlocking terminal in a link monitoring mode and calculates the signal strength value according to the data signal sent by the data channel, compared with the sampling rate of the traditional broadcast signal, the RSSI sampling rate is greatly improved, and the positioning precision of the unlocking terminal is effectively improved.
Description
Technical Field
The invention relates to the technical field of digital key unlocking and positioning, in particular to a digital key unlocking terminal positioning method and system based on RSSI (received signal strength indicator).
Background
With the development of technology, smart keys have been gradually converted from traditional physical keys to digital keys. The carrier of the digital key is usually a product such as a mobile phone, a bracelet, a watch and the like. The user need not to carry the entity key again, only needs activate the digital key on the cell-phone APP can unblock, start the vehicle, and possesses more function than the entity key, if function such as share.
The currently common digital keys are divided into the following types based on radio frequency signals: cloud key, bluetooth key, NFC key, UWB key etc.. The product form-based classification is as follows: the intelligent wearing class such as cell-phone, wrist-watch, bracelet, glasses.
At present, in conventional digital key positioning, a special positioning broadcast is sent out by depending on a mobile phone APP when the mobile phone APP runs, a controlled-end controller acquires RSSI of the positioning broadcast through a plurality of (generally three) arranged antennas, and the current position of the mobile phone is calculated after the RSSI is processed by a positioning algorithm. The digital key system uses three broadcast channels to send out positioning broadcast, and because the fastest broadcast speed is 100 ms/time, the RSSI sampling rate of the broadcast positioning is low, and the high-precision positioning effect cannot be achieved.
Disclosure of Invention
The invention aims to provide a high-precision RSSI-based digital key unlocking terminal positioning method and system for solving the technical problem
In order to achieve the above object, the present invention discloses a method for positioning an RSSI-based digital key unlock terminal, where the unlock terminal is used to establish a communication connection with a controlled terminal through a wireless signal to change the operating state of an electronic lock installed on the controlled terminal, and the positioning method includes:
detecting whether the unlocking terminal and the controlled terminal establish communication connection or not, if so,
the controlled terminal monitors data of a data channel of the unlocking terminal according to the connection parameters and calculates a signal intensity value of the acquired data signal;
and calculating the position of the unlocking terminal according to the signal strength values acquired by the controlled terminal.
Preferably, the method for monitoring the data of the data channel of the unlock terminal includes:
and the controlled end tracks and captures data packets periodically sent by the unlocking terminal in a plurality of data channels according to the connection parameters, and calculates the signal intensity value of the data packets.
Preferably, the connection parameters include an access address, a CRC initial value, a connection interval, a Hop increment, and an ChM Hop mapping table.
Preferably, the unlocking terminal and the controlled terminal are in communication connection through a BLE bluetooth communication system, and an HID service module is arranged in the BLE bluetooth communication system, and when the unlocking terminal and the controlled terminal complete identity authentication for the first time and the unlocking terminal enters the preset range of the controlled terminal again, the unlocking terminal and the controlled terminal automatically establish communication connection through the HID service module.
The invention also discloses a positioning system of the digital key unlocking terminal based on the RSSI, wherein the unlocking terminal is used for establishing communication connection with the controlled terminal through a wireless signal so as to change the working state of an electronic lock arranged on the controlled terminal, and the positioning system comprises a detection module, a monitoring module and a positioning module which are arranged on the controlled terminal;
the detection module is used for detecting whether the communication connection is established between the unlocking terminal and the controlled terminal;
the monitoring module is used for monitoring the data of the data channel of the unlocking terminal according to the feedback and the connection parameters of the detection module and calculating the signal intensity value of the acquired data signal;
and the positioning module is used for calculating the position of the unlocking terminal according to the signal strength values fed back by the monitoring module.
Preferably, the monitoring module tracks and captures data packets periodically sent by the unlocking terminal in a plurality of data channels according to the connection parameters, and calculates the signal strength value of the data packets.
Preferably, the connection parameters include an access address, a CRC initial value, a connection interval, a Hop increment, and an ChM Hop mapping table.
Preferably, the unlocking terminal is in communication connection with the controlled terminal through a BLE bluetooth communication system, and an HID service module is arranged in the BLE bluetooth communication system.
The invention also discloses a RSSI-based digital key unlocking terminal positioning system, which is characterized by comprising the following components:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the RSSI-based digital key unlock terminal location method as described above.
The invention also discloses a computer readable storage medium which comprises a computer program for testing, wherein the computer program can be executed by a processor to complete the RSSI-based digital key unlocking terminal positioning method.
Compared with the prior art, the RSSI-based digital key unlocking terminal positioning method and system have the following beneficial effects:
1. the controlled end monitors the data channel of the unlocking terminal in a link monitoring mode, and calculates a signal strength value according to a data signal sent by the data channel, the data sending frequency of the data channel is about 7.5ms at the fastest speed, the maximum RSSI sampling rate can reach 7.5 ms/time, and the RSSI sampling rate is greatly improved compared with the sampling rate of 100ms of a broadcast signal, so that the positioning precision of the unlocking terminal is effectively improved;
2. because between unblock terminal and the controlled end through BLE bluetooth communication system communication connection, just be provided with HID service module among the BLE bluetooth communication system, consequently, when unblock terminal gets into the broadcast signal within range of controlled end, can initiate the connection automatically, need not start the APP at unblock terminal to realize the noninductive unblanking, it is fast to connect moreover, effectively promotes to use and experiences the sense.
Drawings
Fig. 1 is a schematic flow chart of a positioning method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a link snoop data acquisition process in the embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The embodiment discloses a method for positioning an RSSI-based digital key unlocking terminal, wherein the unlocking terminal can establish communication connection with a controlled terminal through a wireless digital signal so as to change the working state of an electronic lock installed on the controlled terminal, the positioning method is used for positioning the unlocking terminal, and in order to improve the positioning accuracy, as shown in figure 1, the positioning method comprises the following steps:
s1: detecting whether the unlocking terminal and the controlled terminal establish communication connection or not;
s2: after the communication connection between the unlocking terminal and the controlled terminal is confirmed, a connection parameter is generated between the unlocking terminal and the controlled terminal, a data channel of the unlocking terminal sends data according to the connection parameter, the controlled terminal monitors the data of the data channel of the unlocking terminal according to the connection parameter, and the signal strength value (RSSI) of the acquired data signal is calculated;
s3: and calculating the position of the unlocking terminal according to a plurality of signal strength values (generally three) acquired by the controlled terminal. It should be noted here that the method for calculating the location of the device according to the signal strength values belongs to the common technical knowledge in the art, and is not described herein again.
Specifically, the method for monitoring data of a data channel of an unlock terminal includes: the controlled end tracks and captures data packets periodically sent by the unlocking terminal in a plurality of data channels according to the connection parameters, and calculates the signal intensity value of the data packets. More specifically, the connection parameters include an access address, a CRC initial value, a Hop increment, a connection interval, and an ChM Hop mapping table.
Taking a digital key system installed on a vehicle as an example, a controlled end is the vehicle, an unlocking terminal is a mobile phone, after the mobile phone is in communication connection with the vehicle, a wireless communication system on the vehicle sends connection parameters to three antennas on the vehicle through CAN/LIN, the mobile phone CAN periodically send data packets in 37 data channels according to the connection parameters, the antennas monitor the data packets sent out by the data channels according to the connection parameters and calculate the signal intensity value of the data packets at the current moment, then the position of the mobile phone at the current moment is calculated according to the calculated three signal intensity values at the current moment, so that the positioning of the mobile phone is completed, and when the mobile phone is detected to be close to the vehicle and is located in an unlocking area, an electronic lock on the vehicle is opened.
In the above embodiment, the controlled terminal monitors the data channel of the unlock terminal in a link monitoring manner, and calculates the signal strength value according to the data signal sent by the data channel, and the data sending frequency of the data channel is about 7.5ms at the fastest, so that the maximum RSSI sampling rate can reach 7.5 ms/time, and compared with the 100ms sampling rate of the broadcast signal, the RSSI sampling rate is greatly increased, thereby effectively improving the positioning accuracy of the unlock terminal.
For the vehicle, although the digital key has richer vehicle body control functions, the digital key has the problems of complex operation and slow wireless signal connection speed for unlocking and starting two high-frequency functions by one key of the vehicle, so that the digital key is further improved, the unlocking terminal is in communication connection with the controlled end through the BLE Bluetooth communication system, the BLE Bluetooth communication system is internally provided with the HID service module, and when the unlocking terminal and the controlled end complete identity authentication for the first time and then enter the preset range of the controlled end again, the unlocking terminal and the controlled end automatically establish communication connection through the HID service module. In this embodiment, because dispose HID service module in the BLE bluetooth communication system, consequently, when the unblock terminal gets into the broadcast scope of vehicle, need not operate APP on the unblock terminal and can realize with the bluetooth module automatic connection on the vehicle, thereby accomplish vehicle unblock or a key start under the noninductive state, APP development for the unblock need not the keep-alive strategy of adaptation unblock terminal manufacturer system, reduce APP development complexity, and connection speed is fast, only need 2s to realize being connected of unblock terminal and vehicle the fastest, effectively promote user experience and feel.
To sum up, as shown in fig. 2, the present invention discloses a method for positioning an RSSI-based digital key unlock terminal for a vehicle, where the unlock terminal is in communication connection with the vehicle through a BLE bluetooth communication system, and the BLE bluetooth communication system is configured with an HID service module, when the unlock terminal scans the digital key broadcast of the vehicle, the unlock terminal automatically initiates a connection request to a vehicle-end bluetooth module installed on the vehicle (if the identity authentication is completed), and after the connection is successfully established, the vehicle-end bluetooth module obtains a connection parameter and sends the connection parameter to three antennas installed on the vehicle, the antennas track and grab a data packet of a current data channel of the unlock terminal according to the connection parameter, and perform address matching and CRC validation on the data packet according to an access address and an initial value to determine whether the received data packet is from the unlock terminal subjected to the identity validation, and then calculating the RSSI of the data packet, calculating the position of the unlocking terminal according to the RSSI at the current moment, and jumping to a next data channel according to the connection interval, Hop frequency increment and an ChM frequency hopping mapping table to perform next positioning of the unlocking terminal.
The invention also discloses a positioning system of the RSSI-based digital key unlocking terminal, wherein the unlocking terminal is used for establishing communication connection with the controlled terminal through wireless signals so as to change the working state of an electronic lock arranged on the controlled terminal, and the positioning system comprises a detection module, a monitoring module and a positioning module which are arranged on the controlled terminal;
the detection module is used for detecting whether the communication connection is established between the unlocking terminal and the controlled terminal;
the monitoring module is used for monitoring the data of the data channel of the unlocking terminal according to the feedback and the connection parameters of the detection module and calculating the signal intensity value of the acquired data signal;
and the positioning module is used for calculating the position of the unlocking terminal according to the signal strength values fed back by the monitoring module.
Specifically, the monitoring module tracks and captures data packets periodically sent by the unlocking terminal in a plurality of data channels according to the connection parameters, and calculates the signal intensity value of the data packets.
More specifically, the unlocking terminal is in communication connection with the controlled terminal through a BLE Bluetooth communication system, and an HID service module is arranged in the BLE Bluetooth communication system.
The invention also discloses an RSSI-based digital key unlocking terminal positioning system, which comprises one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the program comprises instructions for executing the RSSI-based digital key unlocking terminal positioning method.
The invention also discloses a computer readable storage medium, which comprises a computer program for testing, wherein the computer program can be executed by a processor to complete the RSSI-based digital key unlocking terminal positioning method.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A positioning method of a digital key unlocking terminal based on RSSI (received signal strength indicator), wherein the unlocking terminal is used for establishing communication connection with a controlled terminal through a wireless signal so as to change the working state of an electronic lock installed on the controlled terminal, and the positioning method comprises the following steps:
detecting whether the unlocking terminal and the controlled terminal establish communication connection or not, if so,
the controlled terminal monitors data of a data channel of the unlocking terminal according to the connection parameters and calculates a signal intensity value of the acquired data signal;
and calculating the position of the unlocking terminal according to the signal strength values acquired by the controlled terminal.
2. The RSSI-based digital key unlock terminal positioning method of claim 1, wherein the method of monitoring data of the data channel of the unlock terminal comprises:
and the controlled end tracks and captures data packets periodically sent by the unlocking terminal in a plurality of data channels according to the connection parameters, and calculates the signal intensity value of the data packets.
3. The RSSI-based digital key unlock terminal location method of claim 1, wherein the connection parameters comprise an access address, a CRC initial value, a Hop increment, a connection interval and an ChM frequency hopping map.
4. The RSSI-based positioning method for the digital key unlocking terminal, according to claim 1, wherein the unlocking terminal is in communication connection with the controlled terminal through a BLE Bluetooth communication system, and an HID service module is arranged in the BLE Bluetooth communication system, and when the unlocking terminal enters the preset range of the controlled terminal again after the unlocking terminal and the controlled terminal complete identity authentication for the first time, the unlocking terminal and the controlled terminal automatically establish communication connection through the HID service module.
5. A digital key unlocking terminal positioning system based on RSSI is disclosed, wherein the unlocking terminal is used for establishing communication connection with a controlled terminal through wireless signals so as to change the working state of an electronic lock installed on the controlled terminal, and is characterized in that the positioning system comprises a detection module, a monitoring module and a positioning module which are arranged on the controlled terminal;
the detection module is used for detecting whether the communication connection is established between the unlocking terminal and the controlled terminal;
the monitoring module is used for monitoring the data of the data channel of the unlocking terminal according to the feedback and the connection parameters of the detection module and calculating the signal intensity value of the acquired data signal;
and the positioning module is used for calculating the position of the unlocking terminal according to the signal strength values fed back by the monitoring module.
6. The RSSI-based digital key unlock terminal positioning system of claim 5, wherein the monitoring module tracks and captures data packets periodically transmitted by the unlock terminal on a plurality of data channels according to the connection parameters and calculates the signal strength values of the data packets.
7. The RSSI-based digital key unlock terminal positioning system of claim 5, wherein the connection parameters include an access address, a CRC initial value, a connection interval, a Hop increment and an ChM Hop map.
8. The RSSI-based digital key unlock terminal positioning system according to claim 5, wherein the unlock terminal is in communication connection with the controlled terminal through a BLE Bluetooth communication system, and an HID service module is arranged in the BLE Bluetooth communication system.
9. The utility model provides a digital key unblock terminal positioning system based on RSSI which characterized in that includes:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the RSSI-based digital key unlock terminal location method of any of claims 1 to 4.
10. A computer readable storage medium comprising a computer program for testing, the computer program being executable by a processor to perform the RSSI-based digital key unlock terminal positioning method as recited in any one of claims 1 to 4.
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| CN202110606715.1A CN113298985A (en) | 2021-05-31 | 2021-05-31 | RSSI-based digital key unlocking terminal positioning method and system |
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Cited By (3)
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| CN114827887A (en) * | 2022-03-31 | 2022-07-29 | 远峰科技股份有限公司 | Timing synchronization digital key positioning system based on Bluetooth AoA positioning and ranging |
| CN114866293A (en) * | 2022-04-19 | 2022-08-05 | 广州立功科技股份有限公司 | Multi-node digital key positioning method, device, equipment and storage medium |
| CN115471936A (en) * | 2022-09-06 | 2022-12-13 | 上海汽车集团股份有限公司 | Control method and device of Bluetooth key |
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| CN110753392A (en) * | 2019-10-28 | 2020-02-04 | 北京四海万联科技有限公司 | Bluetooth key positioning system and method based on Internet of vehicles |
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