CN114866293A - Multi-node digital key positioning method, device, equipment and storage medium - Google Patents
Multi-node digital key positioning method, device, equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the application discloses a multi-node digital key positioning method, a device, equipment and a storage medium. According to the technical scheme provided by the embodiment of the application, the monitoring instruction is obtained according to the communication connection with the digital key; sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check; receiving a received signal strength indicating value sent by the frequency offset modulation module; and performing positioning operation according to the received signal strength indicating value to determine the position of the digital key. The technical scheme provided by the embodiment of the application can solve the problem of low safety performance of digital key positioning and improve the safety performance of digital key positioning.
Description
Technical Field
The embodiment of the application relates to the technical field of node positioning, in particular to a method, a device, equipment and a storage medium for positioning a multi-node digital key.
Background
With the development of society, the increase of income of residents can push the upgrading of consumption structures, in the process, more and more people buy automobiles, and in the process of meeting the diversified demands of users, the intelligent degree of the automobiles is higher and higher.
In the intelligent process of the automobile, the Bluetooth technology plays an effective supporting role, the connection and interaction operation of the automobile and a mobile terminal (such as a mobile phone) are realized, the mobile terminal replaces a key, and the application of a keyless entry system and the like is realized. And the mobile terminal is used as a digital key to be in communication connection with the automobile for positioning algorithm processing, so that the position of the digital key is obtained, and positioning is realized.
The existing communication connection between the digital key and the vehicle is usually that the digital key is used as a BLE (Bluetooth Low Energy) broadcaster, a plurality of positioning anchors are used as BLE scanners, and the positioning anchors are connected through a CAN (Controller Area Network )/LIN (Local Interconnect Network) bus. The plurality of positioning anchor points perform positioning algorithm processing on the RSSI (Received Signal Strength Indication) of the BLE Signal of the Received digital key broadcast to obtain the key position. Identity authentication is difficult to perform through a broadcasting mode, and the safety performance is low.
Disclosure of Invention
The embodiment of the application provides a multi-node digital key positioning method, a multi-node digital key positioning device, equipment and a storage medium, which can solve the problem of low digital key positioning safety performance and improve the digital key positioning safety performance.
In a first aspect, an embodiment of the present application provides a multi-node digital key location method, including:
acquiring a monitoring instruction according to the communication connection with the digital key;
sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check;
receiving a received signal strength indicating value sent by the frequency offset modulation module;
and performing positioning operation according to the received signal strength indicating value to determine the position of the digital key.
Further, before acquiring the monitoring instruction according to the communication connection with the digital key, the method includes:
broadcasting information regularly through a Bluetooth broadcast channel so that the digital key initiates a connection request after scanning the broadcast information;
and receiving a connection request sent by the digital key to carry out communication connection.
Further, the monitoring instruction comprises a starting instruction, a first updating instruction, a second updating instruction and a stopping instruction;
the starting instruction comprises ID information, connection state information, frequency hopping interval information, a current connection event count value, a last unmapped channel, a cyclic redundancy check information initial value, access address information and a frequency hopping table, wherein the ID information comprises the ID information of a frequency offset modulation module;
the first updating instruction comprises ID information, connection state information, connection interval information, frequency hopping interval information, a current connection event count value and a last unmapped channel;
the second updating instruction comprises a current connection event count value, a last unmapped channel and a frequency hopping table;
the stop instruction includes ID information and connection state information.
Further, after sending the listening instruction to a plurality of frequency offset modulation modules, the method includes:
and sending a monitoring instruction to the plurality of frequency offset modulation modules so that the frequency offset modulation modules acquire a communication channel with the digital key according to the frequency hopping interval, the current event count value, the last unmapped channel and the frequency hopping table, so that the frequency offset modulation modules perform radio frequency reception according to the communication channel so as to monitor data of an interactive signal sent by the digital key.
Further, the frequency offset modulation module monitors the interactive signal according to the monitoring instruction to obtain a received signal strength indication value, including:
the frequency offset modulation module monitors an interactive signal according to the monitoring instruction;
performing cyclic redundancy check information check on the monitored interactive signals;
after the cyclic redundancy check information passes the check, determining that a correct interaction signal is monitored;
and acquiring a received signal strength indication value in the correct interaction signal.
Further, the sending the monitoring instruction to a plurality of frequency offset modulation modules includes:
sending the starting instruction to a plurality of frequency deviation modulation modules so that the frequency deviation modulation modules monitor interactive signals sent by a digital key to obtain a received signal strength indicating value;
and sending a first updating instruction and a second updating instruction to the frequency offset modulation module at regular time, and acquiring the latest connection state information, connection interval information, frequency hopping interval information, the current connection event count value, the last unmapped channel and the frequency hopping table fed back by the frequency offset modulation module.
Further, the method comprises:
and the frequency offset modulation modules are connected with the frequency offset modulation modules through differential buses.
In a second aspect, an embodiment of the present application provides a multi-node digital key positioning device, including:
the instruction acquisition unit is used for acquiring a monitoring instruction according to the communication connection with the digital key;
the data transceiving unit is used for sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check;
a received signal strength indicating value obtaining unit, configured to receive a received signal strength indicating value sent by the frequency offset modulation module;
and the positioning operation unit is used for performing positioning operation according to the received signal strength indicating value and determining the position of the digital key.
Further, the device also comprises a communication connection unit;
the communication connection unit is used for broadcasting information at regular time through a Bluetooth broadcast channel so as to enable the digital key to initiate a connection request after scanning the broadcast information;
and receiving a connection request sent by the digital key to carry out communication connection.
Further, the monitoring instruction comprises a starting instruction, a first updating instruction, a second updating instruction and a stopping instruction;
the starting instruction comprises ID information, connection state information, frequency hopping interval information, a current connection event count value, a last unmapped channel, a cyclic redundancy check information initial value, access address information and a frequency hopping table, wherein the ID information comprises the ID information of a frequency offset modulation module;
the first updating instruction comprises ID information, connection state information, connection interval information, frequency hopping interval information, a current connection event count value and a last unmapped channel;
the second updating instruction comprises a current connection event count value, a last unmapped channel and a frequency hopping table;
the stop instruction includes ID information and connection state information.
Further, the data transceiver unit is further configured to send a monitoring instruction to the multiple frequency offset modulation modules, so that the frequency offset modulation modules obtain a communication channel with the digital key according to the frequency hopping interval, the current event count value, the previous unmapped channel, and the frequency hopping table, so that the frequency offset modulation modules perform radio frequency reception according to the communication channel to monitor data of an interaction signal sent by the digital key.
Further, the device also comprises a data processing unit;
the data processing unit is used for monitoring an interactive signal according to the monitoring instruction;
performing cyclic redundancy check information check on the monitored interactive signals;
after the cyclic redundancy check information passes the check, determining that a correct interaction signal is monitored;
and acquiring a received signal strength indication value in the correct interaction signal.
Further, the data transceiver unit is further configured to send the start instruction to the multiple frequency offset modulation modules, so that the frequency offset modulation modules monitor an interactive signal sent by a digital key to obtain a received signal strength indication value;
and sending a first updating instruction and a second updating instruction to the frequency offset modulation module at regular time, and acquiring the latest connection state information, connection interval information, frequency hopping interval information, the current connection event count value, the last unmapped channel and the frequency hopping table fed back by the frequency offset modulation module.
Further, the device is also used for being connected with a plurality of frequency offset modulation modules through a differential bus.
In a third aspect, an embodiment of the present application provides a multi-node digital key location apparatus, including:
a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the multi-node digital key location method as described in the first aspect.
In a fourth aspect, embodiments of the present application provide a storage medium storing computer-executable instructions for performing the multi-node digital key location method as described in the first aspect when executed by a computer processor.
The embodiment of the application acquires a monitoring instruction according to communication connection with a digital key, and sends the monitoring instruction to a plurality of frequency deviation modulation modules, so that the frequency deviation modulation modules monitor interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check, receive the received signal strength indicating value sent by the frequency deviation modulation modules, perform positioning operation on the received signal strength indicating value, and determine the position of the digital key. By adopting the technical means, the positioning operation can be carried out through the received signal strength indicated value of the correct interactive information after the cyclic redundancy check, so that the problem of low positioning safety performance of the digital key can be avoided, the accuracy and the safety performance of the positioning operation data can be guaranteed through the cyclic redundancy check, the safety performance is provided by the digital key through data channel communication and a Bluetooth safety mechanism, and the positioning safety performance of the digital key is improved. In addition, monitoring is carried out through the frequency offset modulation module, a plurality of frequency offset modulation modules can be flexibly deployed to serve as fixed-point anchor points, and expandability is improved.
Drawings
FIG. 1 is a flow chart of a multi-node digital key location method provided by an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating connection of various modules provided by an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a multi-node digital key positioning device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a multi-node digital key positioning apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present application are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The multi-node digital key positioning method, device, equipment and storage medium aim to ensure the accuracy of positioning operation data through the check of cyclic redundancy check information when a digital key is positioned so as to improve the safety performance of digital key positioning. In addition, by monitoring through the frequency offset modulation module, a plurality of frequency offset modulation modules can be flexibly deployed to serve as fixed-point anchor points, so that the expandability is improved. Compared with the traditional digital key positioning mode, the positioning method is generally carried out in a broadcasting mode, and the positioning anchor point carries out positioning algorithm processing on a received signal strength indicating value in a Bluetooth signal broadcasted by the received digital key to obtain the position of the digital key. However, the identity authentication is difficult to be performed through the broadcasted bluetooth information, so that the received information may be interfered, the positioning operation is wrong, and the safety performance is low. Therefore, the multi-node digital key positioning method provided by the embodiment of the application is provided to solve the problem of low safety performance of the conventional digital key positioning.
Fig. 1 is a flowchart of a multi-node digital key positioning method according to an embodiment of the present disclosure, where the multi-node digital key positioning method provided in this embodiment may be executed by a multi-node digital key positioning device, the multi-node digital key positioning device may be implemented in a software and/or hardware manner, and the multi-node digital key positioning device may be formed by two or more physical entities or may be formed by one physical entity. Generally, the multi-node digital key positioning device may be a module with data transceiving function, such as a bluetooth module.
The following description will be made by taking a bluetooth module as an example of a main body for executing the multi-node digital key positioning method.
Referring to fig. 1, the multi-node digital key positioning method specifically includes:
and S101, acquiring a monitoring instruction according to the communication connection with the digital key.
Fig. 2 is a schematic diagram of connection of various modules provided in an embodiment of the present application, and referring to fig. 2, a bluetooth module 12 is connected to a plurality of frequency offset modulation modules 13 through a differential bus. Wherein the differential bus comprises a LIN differential bus and belongs to a two-wire differential. The LIN data is transmitted in a double-wire differential mode instead of the existing single-wire mode, so that the transmission rate of the LIN differential bus can reach 500kbps, and the monitoring failure caused by the synchronization delay is greatly reduced. The LIN bus data format is based on data frames, one data frame consisting of 8 bytes of data, one or more data frames constituting different commands, each data frame being assigned a different ID. The digital key 11 may be a mobile terminal such as a mobile phone or the like. In the present embodiment, the digital key 11 is described as an example of a mobile phone. Broadcasting information at regular time through a Bluetooth broadcast channel, so that the digital key 11 initiates a connection request after scanning the broadcast information, and receives the connection request sent by the digital key 11 to perform communication connection. After establishing communication connection with the digital key 11 and completing the identity authentication of the digital key 11, sending a monitoring instruction to a plurality of Frequency shift modulation modules 13, where the Frequency shift modulation modules 13 include a general FSK module, and the general FSK module is an FSK (Frequency-shift keying) monitoring module.
The monitoring instruction comprises a starting instruction, a first updating instruction, a second updating instruction and a stopping instruction. The start instruction is composed of 3 data frames, and specifically includes ID information, connection state information, frequency hopping interval information, current connection event count value, last unmapped channel, Cyclic Redundancy Check (CRC) initial value, access address information, and frequency hopping table, where the ID information includes ID information of the frequency offset modulation module 13. The first update instruction is composed of 1 data frame, and specifically includes ID information, connection state information, connection interval information, frequency hopping interval information, current connection event count value, and last unmapped channel. The second update instruction consists of 1 data frame, and specifically includes a current connection event count value, a last unmapped channel, and a hopping table. The stop instruction is composed of 1 data frame, and specifically includes ID information and connection state information. In addition, the system also comprises an RSSI reporting instruction which consists of a cutting data frame and comprises a transmission received signal strength indicating value (RSSI value).
Wherein the connection state comprises being in a connection state and being in a disconnection state. The hop interval information is used to calculate the next hop channel. And searching a corresponding channel used for next communication in a frequency hopping table through the received frequency hopping interval information. The count value of the current connection event includes how many connection events currently exist, and the connection interval is a time interval between two adjacent connection events. The ID information, the connection status information, the current connection event count value, and the last unmapped channel in the start instruction are generated by the bluetooth module 12 itself, and the hopping interval information, the Cyclic Redundancy Check (CRC) initial value, the access address information, and the hopping table are generated according to the communication connection.
And S102, sending the monitoring instruction to a plurality of frequency deviation modulation modules so that the frequency deviation modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of the correct interactive signals after cyclic redundancy check.
After establishing communication connection with the digital key 11 and completing the identity authentication of the digital key 11, sending a monitoring instruction to the plurality of frequency offset modulation modules 13, so that the frequency offset modulation modules 13 obtain a communication channel with the digital key 11 according to the frequency hopping interval, the current event count value, the last unmapped channel and the frequency hopping table, so that the frequency offset modulation modules 13 perform radio frequency reception according to the communication channel to monitor data of an interaction signal sent by the digital key 11.
In an embodiment, after establishing a communication connection with the digital key 11 and completing the identity authentication of the digital key 11, an activation instruction is sent to the frequency offset modulation modules 13, so that the frequency offset modulation modules 13 perform a general FSK configuration according to the activation instruction, where the general FSK configuration includes a configuration of a data rate and a configuration of a data format, where the data rate is configured to be 1Mbps, the data format is configured to be a preamble, a synchronization address, 8 bits of H0, 8 bits of a length field, 0 bits of H1, a data payload, and Cyclic Redundancy Check (CRC), so as to adapt to a bluetooth data frame. The synchronization address is associated with the access address in the start instruction, the Cyclic Redundancy Check (CRC) information is associated with an initial value of the Cyclic Redundancy Check (CRC) information in the start instruction, the data rate of other configuration information is 1Mbps, the preamble is 8 bits, H0 is 8 bits, the length field is 8 bits, H1 is 0 bit, and the data load belongs to the configuration information of the frequency offset modulation module 13 itself. In addition, the frequency offset modulation module 13 also performs configuration general FSK data whitening setting, configuration general FSK Cyclic Redundancy Check (CRC) information, and synchronization address setting.
In an embodiment, after receiving the start instruction, the frequency offset modulation module 13 calculates a communication channel for data interaction between the digital key 11 and the bluetooth module 12 according to a frequency hopping interval, a current event count value, a previous unmapped channel, and the frequency hopping table in the start instruction by using a bluetooth frequency hopping algorithm, and obtains the communication channel between the bluetooth module 12 and the digital key 11. The frequency offset modulation module 13 starts radio frequency reception on the communication channel, and continuously receives the end of the connection interval to monitor data of the interactive signal sent by the digital key 11, performs cyclic redundancy check information check on the monitored data of the interactive signal, determines a correct interactive signal after the check is passed, and obtains a corresponding received signal strength indication value according to the correct interactive signal.
In an embodiment, the frequency offset modulation module 13 performs data processing on the received interactive signal to obtain a length field, continuously receives data of the interactive signal into a buffer according to the length field, and performs de-whitening processing on the data in the buffer. The interactive signal is extracted and parsed to obtain a packet length field to determine how and when to perform the required bit stream processing on the data. And continuously receiving data to a receiving buffer according to the length field, and performing de-whitening processing and cyclic redundancy check information (CRC) verification on the data in the receiving process.
In an embodiment, the frequency offset modulation module 13 matches the information in the monitored interactive signal according to the monitoring instruction, and when the access address information matches and a cyclic redundancy check information check (CRC check) passes, the interactive signal data packet is a correct interactive signal data packet. The received signal strength indicator value (RSSI value) is obtained by a received signal strength indicator value estimator (RSSI estimator) correctly interacting with the energy of the incoming signal in the signal. And acquiring a received signal strength indication value (RSSI value) in the correct interactive signal, thereby realizing one-time successful monitoring.
In one embodiment, if more than two RSSI values are received within a connection interval, the first RSSI value is marked on the digital key 11 packet and the RSSI value (received signal strength indicator) of the digital key 11 packet is stored, thereby allowing a successful interception of the digital key 11.
And S103, receiving a received signal strength indicating value sent by the frequency offset modulation module.
And the frequency offset modulation module 13 monitors the interactive signal according to the monitoring instruction, and performs cyclic redundancy check information check on the monitored interactive signal. After the cyclic redundancy check information passes the check, it is determined that the correct interaction signal is monitored, the received signal strength indicated value in the correct interaction signal is obtained, and the received signal strength indicated value in the obtained correct interaction signal is sent to the bluetooth module 12 through the LIN bus. The bluetooth module 12 receives the received signal strength indication value transmitted by the frequency offset modulation module 13. The positioning operation is carried out on the received signal strength indicated value of the correct interactive information after the cyclic redundancy check, so that the problem of low positioning safety performance of the digital key can be solved, the accuracy and the safety performance of positioning operation data are guaranteed through the cyclic redundancy check, the safety performance is provided by a data channel communication and Bluetooth safety mechanism used by the digital key, and the safety performance of the positioning of the digital key is improved.
And S104, performing positioning operation according to the received signal strength indication value, and determining the position of the digital key.
The received signal strength indication values (RSSI values) fed back from the plurality of frequency offset modulation modules 13 are received, and positioning calculation processing is performed based on the plurality of received signal strength indication values (RSSI values), so that the position of the digital key 11 is finally positioned.
In an embodiment, the start instruction is sent to a plurality of frequency offset modulation modules 13, so that the frequency offset modulation modules 13 monitor the interactive signals sent by the digital key 11 to obtain the received signal strength indication value. And sending the first update instruction and the second update instruction to the frequency offset modulation module 13 at regular time, and acquiring the latest connection state information, connection interval information, frequency hopping interval information, current connection event count value, last unmapped channel and frequency hopping table fed back by the frequency offset modulation module 13.
Illustratively, referring to fig. 2, the listening process includes a configuration listening phase, a synchronization phase, and a disconnection phase. The configuration monitoring stage includes that the bluetooth module 12 establishes a communication connection with the digital key 11 and after the bluetooth module 12 completes the matching with the digital key 11, the bluetooth module 12 sends a start instruction to the plurality of frequency offset modulation modules 13.
In an embodiment, the monitoring phase includes that after the frequency offset modulation module 13 receives the start instruction, according to the frequency hopping interval, the current event count value, the last unmapped channel and the frequency hopping table in the start instruction, a bluetooth frequency hopping algorithm is used to calculate a communication channel for data interaction between the digital key 11 and the bluetooth module 12, obtain the communication channel between the bluetooth module 12 and the digital key 11, open radio frequency reception on the communication channel, and continuously receive the end of the connection interval to monitor data of an interaction signal sent by the digital key 11, so as to obtain a received signal strength indication value. The bluetooth module 12 receives an RSSI value reporting instruction from the frequency offset modulation module 13 to transmit a received signal strength indication value (RSSI value). The frequency offset modulation module 13 reports the received signal strength indication value (RSSI value) to the bluetooth module 12 through the LIN differential bus.
In an embodiment, the listening phase further includes the frequency offset modulation module 13 determining the preamble format according to the first bit of the synchronization address in the received interactive signal information when the interactive signal is listened to. When the first bit of the synchronization address is 0, the preamble is 0 xAA. When the first bit of the synchronization address is 1, the preamble is 0x 55. The physical layer performs preamble detection by the frequency offset modulation module 13. The physical layer of the frequency offset modulation module 13 searches for the designated synchronous address, and stores the interactive signal information in the receiving buffer after triggering the synchronous address matching. The general FSK packet processor of the frequency offset modulation module 13 extracts and parses the length field of the interactive signal information to determine how and when to perform the required bit stream processing on the data. The frequency offset modulation module 13 continues to receive the data packet to the receive buffer according to the length field. And in the receiving process, de-whitening processing and CRC verification are carried out on the data.
In one embodiment, the synchronization phase includes the bluetooth module 12 sending the first update command and the second update command to the frequency offset modulation module 13 at irregular times. Because the digital key 11 will continuously update the frequency hopping table and update the connection parameters according to the actual situation during the bluetooth connection process, the bluetooth module 12 needs to update the first update instruction and the second update instruction, so that the bluetooth module 12 and the receiving frequency offset modulation module 13 can synchronize the frequency hopping table, the connection interval information, the current connection event count value and the previous unmapped channel at random. After receiving the first update instruction and/or the second update instruction, the receiving frequency offset modulation module 13 restarts to monitor the next connection event according to the new synchronous frequency hopping table, the connection interval information, the current connection event count value, and the previous unmapped channel. The disconnection stage includes that the bluetooth module 12 sends a stop instruction to the frequency offset modulation module 13 after disconnecting from the digital key 11, so as to stop monitoring.
In one embodiment, the bluetooth module 12 broadcasts information periodically over a bluetooth broadcast channel. After scanning the broadcast information of the bluetooth module 12, the digital key 11 initiates a connection request to the bluetooth module 12. The bluetooth module 12 receives the connection request sent by the digital key 11 and establishes a communication connection with the digital key 11. After the bluetooth module 12 establishes a communication connection with the digital key 11 and completes the identity authentication between the bluetooth module 12 and the digital key 11, the bluetooth module 12 sends a start instruction to the n frequency offset modulation modules 13, that is, the bluetooth module 12 sends a start instruction to the frequency offset modulation module 131, the frequency offset modulation module 132, and the frequency offset modulation module 133. The value of n may be set according to practical situations, and is not limited in this embodiment. The frequency offset modulation module n calculates a communication channel for data interaction between the digital key 11 and the bluetooth module 12 according to the received frequency hopping interval, the current event count value, the last unmapped channel and the frequency hopping table in the start instruction, and obtains a communication channel between the bluetooth module 12 and the digital key 11, opens radio frequency reception on the communication channel, and continuously receives the end of the connection interval to monitor data of the interaction signal sent by the digital key 11, and obtains a received signal strength indication value. The frequency offset modulation module 131, the frequency offset modulation module 132, and the frequency offset modulation module 133.. the frequency offset modulation module n obtains cyclic redundancy check information corresponding to the interactive signal according to the monitored interactive signals of the digital key 11 and the bluetooth module 12 to check, screens out a correct interactive signal which is matched with the access address information and passes cyclic redundancy check (CRC check), extracts and analyzes a data packet of the correct interactive signal, and obtains a data packet length field so as to determine how and when to perform required bit stream processing on the data. And according to the length field, continuously receiving data to a packet receiving buffer, and performing de-whitening processing on the data in the receiving process. The frequency offset modulation module 131, the frequency offset modulation module 132, and the frequency offset modulation module 133.. the frequency offset modulation module N monitors and obtains a received signal strength indication value (RSSI value) in the correct interactive signal, which is the RSSI value a monitored by the frequency offset modulation module 131, the RSSI value B monitored by the frequency offset modulation module 132, and the RSSI value c.. the RSSI value N monitored by the frequency offset modulation module 133, respectively. The frequency offset modulation module 131 sends the RSSI value a, the frequency offset modulation module 132 sends the RSSI value B, the frequency offset modulation module 133 sends the RSSI value c.. the frequency offset modulation module N sends the RSSI value N to the bluetooth module 12 through the LIN differential bus, and the bluetooth module 12 performs positioning operation processing according to the RSSI value A, RSSI, the RSSI value B, RSSI, the RSSI value c.. the RSSI value N, and finally positions the digital key 11.
In one embodiment, the LIN bus is a low-speed bus that is brought back, and the transmission speed can only reach up to 20kbps, and the transmission rate is low for snooping, which causes delay in initiating snooping and data synchronization, resulting in continuous snoop failure. In this embodiment, the physical layer of the LI N bus is improved, and LIN data is transmitted in a differential bus manner instead of a single line manner, so that the LIN transmission rate can reach 500kbps, and the monitoring failure caused by synchronization delay is greatly reduced.
In one embodiment, parameter synchronization is realized through the first updating instruction and the second updating instruction, the communication channel needs to be recalculated every time of synchronization, the consistency of the monitoring channel and the channel connected with the Bluetooth is ensured, and therefore the monitoring accuracy is improved, and the safety performance is improved.
As described above, the monitoring instruction is obtained according to the communication connection with the digital key 11, and the monitoring instruction is sent to the multiple frequency offset modulation modules 13, so that the frequency offset modulation modules 13 monitor the interactive signal according to the monitoring instruction to obtain the received signal strength indicating value of the correct interactive information after the cyclic redundancy check, receive the received signal strength indicating value sent by the frequency offset modulation modules 13, perform the positioning operation on the received signal strength indicating value, and determine the position of the digital key 11. By adopting the technical means, the positioning operation can be carried out through the received signal strength indicated value of the correct interactive information after the cyclic redundancy check, so that the problem of low positioning safety performance of the digital key 11 can be solved, the accuracy and the safety performance of the positioning operation data can be guaranteed through the cyclic redundancy check, the safety performance is provided by the digital key through data channel communication and a Bluetooth safety mechanism, and the positioning safety performance of the digital key 11 is improved. In addition, monitoring is performed through the frequency offset modulation module 13, a plurality of frequency offset modulation modules 13 can be flexibly deployed to serve as fixed-point anchor points, and expandability is improved.
Based on the above embodiments, fig. 3 is a schematic structural diagram of a multi-node digital key positioning device according to an embodiment of the present application. Referring to fig. 3, the multi-node digital key positioning device provided in this embodiment specifically includes: an instruction acquisition unit 21, a data transceiving unit 22, a received signal strength indication value acquisition unit 23, and a positioning operation unit 24.
The instruction acquisition unit 21 is configured to acquire a monitoring instruction according to communication connection with the digital key;
the data transceiving unit 22 is configured to send the monitoring instruction to multiple frequency offset modulation modules, so that the frequency offset modulation modules monitor an interactive signal according to the monitoring instruction, and obtain a received signal strength indication value of a correct interactive signal after cyclic redundancy check;
a received signal strength indication value obtaining unit 23, configured to receive the received signal strength indication value sent by the frequency offset modulation module;
and a positioning operation unit 24, configured to perform positioning operation according to the received signal strength indication value, and determine the position of the digital key.
Further, the device also comprises a communication connection unit;
the communication connection unit is used for broadcasting information at regular time through a Bluetooth broadcast channel so as to enable the digital key to initiate a connection request after scanning the broadcast information;
and receiving a connection request sent by the digital key to carry out communication connection.
Further, the monitoring instruction comprises a starting instruction, a first updating instruction, a second updating instruction and a stopping instruction;
the starting instruction comprises ID information, connection state information, frequency hopping interval information, a current connection event count value, a last unmapped channel, a cyclic redundancy check information initial value, access address information and a frequency hopping table, wherein the ID information comprises the ID information of a frequency offset modulation module;
the first updating instruction comprises ID information, connection state information, connection interval information, frequency hopping interval information, a current connection event count value and a last unmapped channel;
the second updating instruction comprises a current connection event count value, a last unmapped channel and a frequency hopping table;
the stop instruction includes ID information and connection state information.
Further, the data transceiver unit 22 is further configured to send a monitoring instruction to the multiple frequency offset modulation modules, so that the frequency offset modulation modules obtain a communication channel with the digital key according to the frequency hopping interval, the current event count value, the previous unmapped channel, and the frequency hopping table, so that the frequency offset modulation modules perform radio frequency reception according to the communication channel to monitor data of an interaction signal sent by the digital key.
Further, the device also comprises a data processing unit;
the data processing unit is used for monitoring an interactive signal according to the monitoring instruction;
performing cyclic redundancy check information check on the monitored interactive signals;
after the cyclic redundancy check information passes the check, determining that a correct interaction signal is monitored;
and acquiring a received signal strength indication value in the correct interaction signal.
Further, the data transceiver unit 22 is further configured to send the start instruction to the multiple frequency offset modulation modules, so that the frequency offset modulation modules monitor an interactive signal sent by a digital key to obtain a received signal strength indication value;
and sending a first updating instruction and a second updating instruction to the frequency offset modulation module at regular time, and acquiring the latest connection state information, connection interval information, frequency hopping interval information, the current connection event count value, the last unmapped channel and the frequency hopping table fed back by the frequency offset modulation module.
Further, the device is also used for being connected with a plurality of frequency offset modulation modules through a differential bus.
The monitoring instruction is obtained according to the communication connection with the digital key, and the monitoring instruction is sent to the plurality of frequency offset modulation modules, so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain the received signal strength indicated value of the correct interactive signal after cyclic redundancy check, the received signal strength indicated value sent by the frequency offset modulation modules is received, the received signal strength indicated value is subjected to positioning operation, and the position of the digital key is determined. By adopting the technical means, the positioning operation can be carried out through the received signal strength indicated value of the correct interactive information after the cyclic redundancy check, so that the problem of low positioning safety performance of the digital key can be avoided, the accuracy and the safety performance of the positioning operation data can be guaranteed through the cyclic redundancy check, the safety performance is provided by the digital key through data channel communication and a Bluetooth safety mechanism, and the positioning safety performance of the digital key is improved. In addition, monitoring is carried out through the frequency offset modulation module, a plurality of frequency offset modulation modules can be flexibly deployed to serve as fixed-point anchor points, and expandability is improved.
The multi-node digital key positioning device provided by the embodiment of the application can be used for executing the multi-node digital key positioning method provided by the embodiment, and has corresponding functions and beneficial effects.
An embodiment of the present application provides a multi-node digital key positioning apparatus, and referring to fig. 4, the multi-node digital key positioning apparatus includes: a processor 31, a memory 32, a communication module 33, an input device 34, and an output device 35. The number of processors in the multi-node digital key location device may be one or more, and the number of memories in the multi-node digital key location device may be one or more. The processor, memory, communication module, input device and output device of the multi-node digital key positioning device may be connected by a bus or other means.
The memory 32 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the multi-node digital key location method according to any embodiment of the present application (for example, an instruction obtaining unit, a data transceiving unit, a received signal strength indication value obtaining unit, and a location calculating unit in the multi-node digital key location device). The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory may further include memory located remotely from the processor, and these remote memories may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication module 33 is used for data transmission.
The processor 31 executes various functional applications of the device and data processing by executing software programs, instructions and modules stored in the memory, that is, implements the multi-node digital key location method described above.
The input device 34 may be used to receive entered numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device 35 may include a display device such as a display screen.
The multi-node digital key positioning device provided by the above can be used for executing the multi-node digital key positioning method provided by the above embodiment, and has corresponding functions and beneficial effects.
Embodiments of the present application also provide a storage medium storing computer-executable instructions that, when executed by a computer processor, are configured to perform a multi-node digital key location method, the multi-node digital key location method comprising: acquiring a monitoring instruction according to the communication connection with the digital key; sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check; receiving a received signal strength indicating value sent by the frequency offset modulation module; and performing positioning operation according to the received signal strength indicating value to determine the position of the digital key.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations, e.g., in different computer systems connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium storing computer-executable instructions provided in the embodiments of the present application is not limited to the multi-node digital key location method described above, and may also perform related operations in the multi-node digital key location method provided in any embodiments of the present application.
The multi-node digital key positioning device, the storage medium and the multi-node digital key positioning apparatus provided in the above embodiments may perform the multi-node digital key positioning method provided in any embodiment of the present application, and the technical details not described in detail in the above embodiments may be referred to the multi-node digital key positioning method provided in any embodiment of the present application.
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.
Claims (10)
1. A multi-node digital key location method, comprising:
acquiring a monitoring instruction according to the communication connection with the digital key;
sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check;
receiving a received signal strength indicating value sent by the frequency offset modulation module;
and performing positioning operation according to the received signal strength indicating value to determine the position of the digital key.
2. The multi-node digital key location method of claim 1, wherein prior to obtaining the monitoring instruction based on the communication link with the digital key, comprising:
broadcasting information regularly through a Bluetooth broadcast channel so that the digital key initiates a connection request after scanning the broadcast information;
and receiving a connection request sent by the digital key to carry out communication connection.
3. The multi-node digital key location method of claim 1, wherein the listening command comprises a start command, a first update command, a second update command, and a stop command;
the starting instruction comprises ID information, connection state information, frequency hopping interval information, a current connection event count value, a last unmapped channel, a cyclic redundancy check information initial value, access address information and a frequency hopping table, wherein the ID information comprises the ID information of a frequency offset modulation module;
the first updating instruction comprises ID information, connection state information, connection interval information, frequency hopping interval information, a current connection event count value and a last unmapped channel;
the second updating instruction comprises a current connection event count value, a last unmapped channel and a frequency hopping table;
the stop instruction includes ID information and connection state information.
4. The multi-node digital key location method of claim 3, wherein said sending said listening instructions to a plurality of frequency offset modulation modules comprises:
and sending a monitoring instruction to the plurality of frequency offset modulation modules so that the frequency offset modulation modules acquire a communication channel with the digital key according to the frequency hopping interval, the current event count value, the last unmapped channel and the frequency hopping table, so that the frequency offset modulation modules perform radio frequency reception according to the communication channel so as to monitor data of an interactive signal sent by the digital key.
5. The multi-node digital key location method of claim 3, wherein the frequency offset modulation module monitors the interactive signal according to the monitoring command to obtain a received signal strength indication value, comprising:
the frequency offset modulation module monitors an interactive signal according to the monitoring instruction;
performing cyclic redundancy check information check on the monitored interactive signals;
after the cyclic redundancy check information passes the check, determining that a correct interaction signal is monitored;
and acquiring a received signal strength indication value in the correct interaction signal.
6. The multi-node digital key location method of claim 3 wherein said sending said listening instructions to a plurality of frequency offset modulation modules comprises:
sending the starting instruction to a plurality of frequency deviation modulation modules so that the frequency deviation modulation modules monitor interactive signals sent by a digital key to obtain a received signal strength indicating value;
and sending a first updating instruction and a second updating instruction to the frequency offset modulation module at regular time, and acquiring the latest connection state information, connection interval information, frequency hopping interval information, the current connection event count value, the last unmapped channel and the frequency hopping table fed back by the frequency offset modulation module.
7. The multi-node digital key location method of claim 1, comprising:
and the frequency offset modulation modules are connected with the frequency offset modulation modules through differential buses.
8. A multi-node digital key location device, comprising:
the instruction acquisition unit is used for acquiring a monitoring instruction according to the communication connection with the digital key;
the data transceiving unit is used for sending the monitoring instruction to a plurality of frequency offset modulation modules so that the frequency offset modulation modules monitor the interactive signals according to the monitoring instruction to obtain a received signal strength indicating value of a correct interactive signal after cyclic redundancy check;
a received signal strength indicating value obtaining unit, configured to receive a received signal strength indicating value sent by the frequency offset modulation module;
and the positioning operation unit is used for performing positioning operation according to the received signal strength indicating value and determining the position of the digital key.
9. A multi-node digital key location apparatus, comprising:
a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-7.
10. A storage medium storing computer-executable instructions, which when executed by a processor, are configured to perform the method of any one of claims 1-7.
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