CN117641236A - Digital key ultra-bandwidth ranging method, system and ranging response method - Google Patents
Digital key ultra-bandwidth ranging method, system and ranging response method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- 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
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
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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
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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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
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
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- Signal Processing (AREA)
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- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention relates to a wireless communication technology, and discloses a digital key ultra-bandwidth ranging method, a system and a ranging response method, wherein the ranging method comprises the following steps: the vehicle control system establishes connection with the remote control key and judges whether an access address of the remote control key is written or not; if the access address is written, the vehicle control system sends a ranging instruction to the remote control key; the remote control key responds to the ranging instruction and performs communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process; and the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key. According to the remote control key unlocking method and device, the remote control key unlocking efficiency and the remote control key unlocking speed can be improved by writing the access address of the remote control key in advance.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a digital key ultra-bandwidth ranging method, a digital key ultra-bandwidth ranging system and a ranging response method.
Background
Common UWB (Ultra Wide Band) use modes, such as the international CCC standard and the FIRA standard, have multi-step negotiation processes when UWB is used, and such processes are beneficial to the adaptation of the universal standard to Wide devices, so that the safety of communication between the devices can be ensured; however, in the case of a physical key for a specific device, such as UWB, the multi-step negotiation process affects the efficiency of UWB ranging establishment; in addition, because the wireless communication is based, the probability of communication errors becomes high in the multi-step negotiation process, and further, UWB parameters need to be retransmitted or renegotiated, which can lead to the situation that a vehicle owner waits or cannot control the vehicle in a short time when using a key.
Disclosure of Invention
The invention provides a digital key ultra-bandwidth ranging method, a system, electronic equipment and a computer readable storage medium, and mainly aims to solve the problems of low unlocking efficiency and low unlocking speed of a remote key.
In order to achieve the above object, the present invention provides a digital key ultra-bandwidth ranging method, comprising:
the vehicle control system establishes connection with the remote control key and judges whether an access address of the remote control key is written or not;
if the access address is written, the vehicle control system sends a ranging instruction to the remote control key;
the remote control key responds to the ranging instruction and performs communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
and the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key.
In an embodiment of the present invention, before the vehicle control system establishes a connection with the remote control key, the method further includes: and writing the access address of the remote control key into the vehicle control system in advance to realize the pre-configuration of the remote control key and the vehicle control system.
In an embodiment of the present invention, when the access address of the remote control key is written in the vehicle control system in advance, the method further includes: the remote control key transmits the corresponding wireless communication parameters to the vehicle control system, so that the vehicle control system knows the wireless communication parameters of the remote control key. .
In an embodiment of the present invention, after the remote control key transmits the corresponding wireless communication parameters to the vehicle control system, the remote control key further includes:
the vehicle control system acquires interacted wireless communication parameters;
the vehicle control system optimizes the parameter usage pattern according to the interacted wireless communication parameters.
In an embodiment of the present invention, the determining whether the access address of the remote control key is written includes:
the vehicle control system acquires an access address written in advance by the vehicle control system;
comparing the pre-written access address with the access address of the remote control key;
if the comparison result is the same, the access address of the remote control key is judged to be written.
In an embodiment of the present invention, the communication interaction with the ultra-wideband antenna includes:
the remote control key sends an initial ranging frame to the ultra-wideband antenna;
the ultra-bandwidth antenna sends a response ranging frame to the remote control key according to the ranging frame;
the remote control key sends a tail frame ranging frame to the ultra-bandwidth antenna;
the remote key integrates the response ranging frame to generate a feedback data frame and sends the feedback data frame to the ultra-wideband antenna.
In an embodiment of the present invention, the remote key sends an initial ranging frame to the ultra-wideband antenna, including:
the remote control key sends a forecast frame to the ultra-bandwidth antenna;
and the remote control key sends a first frame ranging frame to the ultra-wideband antenna, and the forenotice frame and the first frame ranging frame are used as initial ranging frames.
In an embodiment of the present invention, the calculation of the distance between the ultra-wideband antenna and the remote control key according to the distance measurement frame generated by the ultra-wideband antenna and the remote control key includes:
acquiring the arrival time of the ranging frame, and calculating a time difference according to the arrival time;
calculating the flight time corresponding to the ultra-bandwidth antenna according to the time difference;
and calculating the distance between the ultra-bandwidth antenna and the remote control key according to the flight time.
In order to solve the above problem, the present invention further provides a digital key ultra-bandwidth ranging system, which is characterized in that the system includes: a vehicle control system, a remote key, and an ultra-wideband antenna;
the vehicle control system is used for establishing connection with the remote control key and judging whether an access address of the remote control key is written or not; when the access address is written, a ranging instruction is sent to the remote control key;
the remote control key is used for responding to the ranging instruction and performing communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
the ultra-bandwidth antenna is used for calculating the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key.
In order to solve the above problem, the present invention further provides a digital key ultra-bandwidth ranging response method, which is characterized in that the method includes:
the vehicle control system establishes connection with the remote control key and judges whether an access address of the remote control key is written or not;
if the access address is written, the vehicle control system sends a ranging instruction to the remote control key;
the remote control key responds to the ranging instruction and performs communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key;
the vehicle control system controls unlocking of the vehicle according to the distance.
The invention judges whether the pairing between the vehicle control system and the remote control key is finished in advance by writing the access address of the remote control key into the vehicle control system or not, and directly carries out ultra-bandwidth ranging under the paired condition without carrying out parameter negotiation, thereby omitting the process of parameter interaction negotiation, improving the unlocking efficiency of the remote control key, reducing the probability of communication interaction errors between the remote control key and the vehicle control system and between the remote control key and the ultra-bandwidth antenna, and improving the unlocking control accuracy. Therefore, the digital key ultra-bandwidth ranging method, the system, the electronic equipment and the computer readable storage medium can solve the problems of low unlocking efficiency and low unlocking speed of the remote control key.
Drawings
Fig. 1 is a flow chart of a digital key ultra-bandwidth ranging method according to an embodiment of the invention;
fig. 2 is a flow chart of a digital key ultra-bandwidth ranging response method according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a digital key ultra-wideband ranging system according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the application provides a digital key ultra-bandwidth ranging method. The execution subject of the digital key ultra-bandwidth ranging method includes, but is not limited to, at least one of a server, a terminal, and the like, which can be configured to execute the method provided by the embodiment of the application. In other words, the digital key ultra-bandwidth ranging method may be performed by software or hardware installed at a terminal device or a server device. The service end includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, and the like. The server may be an independent server, or may be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and basic cloud computing services such as big data and artificial intelligence platforms.
Referring to fig. 1, a flow chart of a digital key ultra-bandwidth ranging method according to an embodiment of the invention is shown. In this embodiment, the digital key ultra-bandwidth ranging method includes:
s1, the vehicle control system establishes connection with a remote control key and judges whether an access address of the remote control key is written.
In the embodiment of the present invention, the vehicle control system may be a vehicle end BCM (body control module, vehicle body control module), which represents a vehicle end control system; the remote control key (key fob) utilizes the wireless remote control function of the central control lock to realize remote door opening or door locking.
In the embodiment of the invention, the vehicle control system and the remote control key can be connected through Bluetooth, and the remote control key can transmit the MAC address (Media Access Control Address, the media access control address, also called local area network address) to the vehicle control system in the connecting process.
In the embodiment of the invention, before the vehicle control system establishes connection with the remote control key, the method further comprises the following steps: and writing the access address of the remote control key into the vehicle control system in advance to realize the pre-configuration of the remote control key and the vehicle control system. Further, after the vehicle control system establishes connection with the remote control key, the vehicle control system may compare the received access address with the access address written in advance, so as to determine whether the remote control key has been preconfigured.
Further, when the access address of the remote control key is written in the vehicle control system in advance, wireless communication parameters corresponding to the remote control key, namely Ultra Wide Band (UWB) capability, are transmitted to the vehicle control system, namely after the remote control key is connected with the vehicle control system, the wireless communication parameters of the remote control key are known in advance, and the process of parameter negotiation between the vehicle control system and the remote control key is saved.
Specifically, the wireless communication parameters include a ranging capability parameter and a ranging session parameter; the Ranging capability parameter is a parameter fed back through a Ranging capability (Ranging Capability) procedure, and the Ranging Session parameter is a parameter fed back through a Ranging Session (Ranging Session) procedure, and the like.
The parameters fed back through the ranging capability flow include: supported protocol version, supported UWB configuration ID, supported pulse shape combination; the parameters fed back through the ranging session flow include: a supported UWB channel, a desired ranging period, a supported ranging slot length, a supported synchronization code sequence.
In an actual application scene, the remote control key and the mobile equipment have the characteristic of less update or no update, so the ranging capability parameter generally remains unchanged, and after the ranging capability parameter of the remote control key is transmitted to the vehicle control system in advance, the parameter negotiation process of the ranging capability can be omitted in the subsequent interaction of the remote control key and the vehicle control system by saving the interactive capability parameter.
In addition, for a remote key device, due to the certainty of the ranging session parameter strategy, the ranging session parameters are stored and fixed, so that the parameter negotiation process of the ranging session is omitted in the subsequent interaction of the remote key device and the vehicle control system.
Therefore, through the pre-parameter interaction between the vehicle control system and the remote control key, the vehicle control system can save the wireless communication parameters of the remote control key, ensure the reliability of the subsequent distance measurement establishment, realize that the vehicle control system knows the wireless communication parameters of the remote control key in the interaction process of the subsequent vehicle control system and the remote control key, further save the process of negotiating the distance measurement between the vehicle control system and the remote control key, shorten the time for establishing the distance measurement between the remote control key and the remote control key, and improve the safety of the remote control key interaction.
In the embodiment of the invention, after the wireless communication parameters corresponding to the remote control key are transmitted to the vehicle control system, the wireless communication parameters interacted by the vehicle control system are acquired, and the parameter using mode of the vehicle control system is optimized according to the interacted wireless communication parameters.
Specifically, different remote control keys or mobile devices and the like have different wireless communication parameters, and the vehicle control system can be configured to maximize parameters such as ranging performance and the like, namely, select appropriate parameters to fit actual working conditions.
For example, different mobile phone providers use different communication protocols, and the ranging periods used are different; the vehicle end can combine the number of the devices added with interaction by the vehicle control system and the like, and the distance measurement period is shortened at a proper time so as to increase the sampling amount of the interaction data, thereby achieving the purpose of optimizing the parameter use mode.
In the embodiment of the present invention, the determining whether the access address of the remote control key is written includes:
acquiring an access address written in advance in the vehicle control system;
comparing the pre-written access address with the access address of the remote control key;
if the comparison result is the same, the access address of the remote control key is judged to be written.
In the embodiment of the invention, the access address of the remote control key is the same as the access address which is written in advance by the vehicle control system, so that the remote control key is a preconfigured device, and the parameters of the wireless communication parameters of the remote control key are interacted with the vehicle end in advance and stored, thereby improving the reliability of the subsequent ranging establishment; in the subsequent process of ranging and unlocking with the vehicle end, the remote control key does not need to perform interaction of parameters such as ranging capability parameters, ranging session parameters and the like again, so that the time for establishing ranging is shortened, the speed of the vehicle end responding to the remote control key is further improved, and the time for a vehicle owner to wait for unlocking the vehicle is shortened.
S2, if the access address is written, the vehicle control system sends a ranging instruction to the remote control key.
In the embodiment of the invention, after the remote control key and the vehicle end are matched, the ranging process can be started; the vehicle control system can inform the remote control key to start ultra-bandwidth ranging through a Bluetooth channel; meanwhile, the vehicle control system can inform the ultra-bandwidth antenna at the vehicle end of preparing for ranging.
Specifically, the ultra-bandwidth antenna is an anchor point arranged at the vehicle end, and the anchor points can be multiple; for example, the ultra-wideband antennas may be set to 6, 4 (UWB-1, UWB-2, UWB-3, UWB-4) at the lamp positions of the head and tail, respectively, and the other 2 (UWB-5, UWB-6) at the front and rear of the vehicle body.
S3, responding to the ranging instruction by the remote control key, and performing communication interaction with an ultra-wideband antenna; and the remote control key and the ultra-wideband antenna respectively generate a ranging frame in the communication interaction process.
In the embodiment of the invention, after the remote control key receives the ranging instruction sent by the vehicle end, an opening instruction is correspondingly sent to the vehicle control system, and ranging interaction is started; the starting instruction responds to the ranging instruction, and the ultra-bandwidth ranging is started.
In the embodiment of the invention, the communication interaction with the ultra-wideband antenna comprises the following steps:
the remote control key sends an initial ranging frame to the ultra-wideband antenna;
the ultra-bandwidth antenna sends a response ranging frame to the remote control key according to the ranging frame;
the remote control key sends a tail frame ranging frame to the ultra-bandwidth antenna;
the remote key integrates the response ranging frame to generate a feedback data frame and sends the feedback data frame to the ultra-wideband antenna.
Further, the remote key transmits an initial ranging frame to the ultra-wideband antenna, including:
the remote control key sends a forecast frame to the ultra-bandwidth antenna;
and the remote control key sends a first frame ranging frame to the ultra-wideband antenna, and the forenotice frame and the first frame ranging frame are used as initial ranging frames.
In the embodiment of the present invention, the remote key and the ultra-wideband antenna respectively generate ranging frames in the communication interaction process, where the ranging frames include an initial ranging frame (i.e., a first frame moment measuring frame poll), a feedback data frame (i.e., a response ranging frame response 1 … X), and a tail frame ranging frame (final).
In the embodiment of the invention, the forenotice frame (pre-poll) contains parameters such as a session number, a scrambling time stamp serial number and the like, so that the ultra-bandwidth antenna can identify correct equipment and prevent other equipment from being interfered; the first moment of measurement frame (poll), which contains no parameters, enhances security by entraining the scrambling time stamp sequence so that the ultra-wideband antenna listens for the arrival time.
In the embodiment of the invention, when the ultra-wideband antenna sends a response ranging frame to the remote key according to the ranging frame, each ultra-wideband antenna replies the response ranging frame (responser 1..X) according to the antenna sequence, so that the remote key monitors the signal arrival time, namely, UWB-1 sends out the response ranging frame first, and then UWB-2 sends out the response ranging frame again until UWB-6 sends out the response ranging frame.
The remote control key sends out a tail frame moment measuring frame (final) so that the UWB antenna monitors the arrival time; the remote control key integrates the recorded arrival time of the response ranging frames of each ultra-wide antenna, then sends a feedback data frame (final-data) to the ultra-wide antenna, and the ultra-wide antenna calculates the distance between the remote control key and the key according to the locally recorded arrival time and the arrival time received through the feedback data frame (final-data).
Wherein, the advance notice frame (pre-poll) and the feedback data frame (final-data) are SP0 data frames, which are provided with parameters; the first frame moment frame (poll), the response ranging frame (response 1 … X), and the last frame moment frame (final) are SP3 ranging frames, without parameters.
Taking the advance notice frame (pre-poll) as an example, the carried parameters include: UWB Session ID (ultra wide Session number), ranging Block, round Index, etc.; after the ranging is started, a remote control key and a UWB chip of an ultra-wideband antenna establish a ranging Session, the control of the ranging Session is realized through UWB_session_ID, the session_ID can be used for distinguishing different ranging sessions, and each UWB configuration parameter corresponding to each Session ID; each Ranging session includes a plurality of Ranging blocks, each Ranging Block includes a plurality of Round, each Round corresponds to a UWB Ranging interaction procedure (Ranging Round of Pre-poll, poll, responder1 … X, final, final-Data), and each Round includes a plurality of slots for placing UWB frames such as Pre-Poll, poll, response0-N, final, final Data, etc.
And S4, the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key.
In the embodiment of the invention, TOF (Time of flight) can be calculated according to a ranging frame through DS-TWR (Double-side two-way ranging), so that the distance between the ultra-bandwidth antenna and the remote control key can be calculated according to the TOF.
Specifically, the process of sending out the first frame ranging frame (poll), the response ranging frame (response 1 … X) and the last frame ranging frame (final) may be used as three interactions in the DS-TWR (Double-side two-way ranging) process; DS-TWR is an extension of SS-TWR (Single-side two-way ranging), which measures the round trip time of a Single message. I.e. a single message is sent from device a to device B, and then a response is returned by device B to device a; the DS-TWR uses and combines two round trip times for ranging, by which it can be achieved that TOF results with smaller errors can be given for a longer response delay even in the case of uncorrected clock frequency offsets.
In the embodiment of the present invention, the calculation of the distance between the ultra-wideband antenna and the remote control key according to the distance measurement frame generated by the ultra-wideband antenna and the remote control key includes:
acquiring the arrival time of the ranging frame, and calculating a time difference according to the arrival time;
calculating the flight time corresponding to the ultra-bandwidth antenna according to the time difference;
and calculating the distance between the ultra-bandwidth antenna and the remote control key according to the flight time.
In the embodiment of the invention, after the remote control key sends the initial ranging frame to each ultra-wideband antenna, the arrival time of each ultra-wideband antenna for receiving the initial ranging frame is different; the arrival time of each ultra-bandwidth antenna for sending a response ranging frame to the remote control key according to the corresponding ranging frame is different; after the remote control key receives the response ranging frames sent by all the ultra-wide antennas, tail frame ranging frames are sent to all the ultra-wide antennas, and the arrival time of the tail frame ranging frames received by all the ultra-wide antennas is different.
Taking 2 ultra-wideband antennas (UWB-1 and UWB-2) at the head lamp as an example, the time difference between the transmission of an initial ranging frame by the remote control key and the reception of a response ranging frame returned by the UWB-1 is A1, the time difference between the transmission of the initial ranging frame by the remote control key and the reception of the response ranging frame returned by the UWB-2 is A2, and because the receiving sequence and the transmitting sequence of the UWB-1 are in front of the UWB-2, A2 is larger than A1;
the time difference between the initial ranging frame received by the UWB-1 and the response ranging frame transmitted by the UWB-2 is B1, and the time difference between the initial ranging frame received by the UWB-2 and the response ranging frame transmitted by the UWB-2 is B2, wherein D1 is smaller than B2 because the receiving sequence and the transmitting sequence of the UWB-1 are in front of the UWB-2;
the time difference between the response ranging frame sent by the UWB-1 and the time between the transmission of the tail ranging frame and the UWB-1 received by the remote control key is C1, the time difference between the response ranging frame sent by the UWB-2 and the time between the transmission of the tail ranging frame and the UWB-2 received by the remote control key is C2, and the C1 is larger than C2 because the receiving sequence and the transmitting sequence of the UWB-1 are in front of the UWB-2;
the time difference between the UWB-1 transmitting response ranging frame and the tail frame ranging frame transmitted by the receiving remote control key is D1, the time difference between the UWB-2 transmitting response ranging frame and the tail frame ranging frame transmitted by the receiving remote control key is D2, and because the receiving sequence and the transmitting sequence of the UWB-1 are in front of the UWB-2, D1 is larger than D2;
further, the time of flight of the ultra-wideband antenna is calculated using the following equation:
wherein TOF is represented as the flight time of the ultra-wide antenna, A is represented as the time difference between the time when the remote key transmits an initial ranging frame to the ultra-wide antenna and the time when the remote key receives a response ranging frame returned by the ultra-wide antenna; b is expressed as the time difference between the receiving of the initial ranging frame and the sending of the response ranging frame by the ultra-bandwidth antenna; c represents the time difference between the response ranging frame sent by the ultra-bandwidth antenna and the transmission tail frame ranging frame sent by the ultra-bandwidth antenna received by the remote control key; the D ultra-bandwidth antenna transmits a time difference between a response ranging frame and a tail frame ranging frame transmitted by the receiving remote control key.
In the embodiment of the invention, the distance between the ultra-wideband antenna and the remote control key can be obtained by multiplying the propagation speed of the ranging frame (the propagation speed of electromagnetic waves) by the flight time of the ultra-wideband antenna.
Further, after the distance between the ultra-wide band antenna and the remote control key is calculated, the distance CAN be sent to a vehicle control system through a CAN/LIN bus, the vehicle control system positions according to the distance, and if the distance corresponding to the ultra-wide band antenna is within a preset unlocking range, unlocking of the vehicle is controlled; the unlocking ranges corresponding to different ultra-wideband antennas can be different.
As shown in fig. 2, an embodiment of the present invention provides a digital key ultra-bandwidth ranging response method, which is characterized in that the method includes:
g1, establishing connection between a vehicle control system and a remote control key, and judging whether an access address of the remote control key is written;
g2, if the access address is written, the vehicle control system sends a ranging instruction to the remote control key;
g3, responding to the ranging instruction by the remote control key, and performing communication interaction with an ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
g4, the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key;
and G5, the vehicle control system controls unlocking of the vehicle according to the distance.
The invention judges whether the pairing between the vehicle control system and the remote control key is finished in advance by writing the access address of the remote control key into the vehicle control system or not, and directly carries out ultra-bandwidth ranging under the paired condition without carrying out parameter negotiation, thereby omitting the process of parameter interaction negotiation, improving the unlocking efficiency of the remote control key, reducing the probability of communication interaction errors between the remote control key and the vehicle control system and between the remote control key and the ultra-bandwidth antenna, and improving the unlocking control accuracy. Therefore, the digital key ultra-bandwidth distance measurement method and the distance measurement response method provided by the invention can solve the problems of low unlocking efficiency and low unlocking speed of the remote control key.
Fig. 3 is a schematic diagram of a digital key ultra-bandwidth ranging system 100 according to an embodiment of the invention. Depending on the functions implemented, the digital key ultra-wideband ranging system may include a vehicle control system 101, a key fob 102, and an ultra-wideband antenna 103. The module of the present invention may also be referred to as a unit, meaning a series of computer program segments capable of being executed by the processor of the digital key ultra-wideband ranging system and performing a fixed function, stored in the memory of the digital key ultra-wideband ranging system.
In the present embodiment, the functions concerning the respective modules/units are as follows:
the vehicle control system 101 is configured to establish a connection with the remote control key 102, and determine whether an access address of the remote control key 102 is written; transmitting a ranging instruction to the remote control key 102 when the access address has been written;
the remote control key 102 is used for responding to the ranging instruction and performing communication interaction with the ultra-bandwidth antenna 103; wherein, the remote control key 102 and the ultra-bandwidth antenna 103 respectively generate ranging frames in the communication interaction process;
the ultra-bandwidth antenna 103 is used for calculating the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key 102.
In another alternative embodiment of the present invention, the vehicle control system 101 may also control unlocking of the vehicle according to the distance calculated by the ultra-wideband antenna 103
In detail, each module in the digital key ultra-bandwidth ranging system 100 in the embodiment of the present invention adopts the same technical means as the digital key ultra-bandwidth ranging method in the drawings when in use, and can produce the same technical effects, and the details are not repeated here.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus, system and method may be implemented in other manners. For example, the system embodiments described above are merely illustrative, e.g., the division of the modules is merely a logical function division, and other manners of division may be implemented in practice.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units can be realized in a form of hardware or a form of hardware and a form of software functional modules.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Multiple units or systems as set forth in the system claims may also be implemented by means of one unit or system in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A digital key ultra-wide band ranging method, the method comprising:
the vehicle control system establishes connection with the remote control key and judges whether an access address of the remote control key is written or not;
if the access address is written, the vehicle control system sends a ranging instruction to the remote control key;
the remote control key responds to the ranging instruction and performs communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
and the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key.
2. The digital key ultra-wideband ranging method of claim 1, further comprising, prior to the vehicle control system establishing a connection with a key fob: and writing the access address of the remote control key into the vehicle control system in advance to realize the pre-configuration of the remote control key and the vehicle control system.
3. The digital key ultra-wideband ranging method of claim 2, wherein when the access address of the remote key is pre-written into the vehicle control system, further comprising: the remote control key transmits the corresponding wireless communication parameters to the vehicle control system, so that the vehicle control system knows the wireless communication parameters of the remote control key.
4. The digital key ultra-wideband ranging method of claim 3, further comprising, after the remote key transmits corresponding wireless communication parameters to the vehicle control system:
the vehicle control system acquires interacted wireless communication parameters;
the vehicle control system optimizes the parameter usage pattern according to the interacted wireless communication parameters.
5. The digital key ultra-wideband ranging method of claim 1, wherein said determining whether the access address of the key fob has been written comprises:
the vehicle control system acquires an access address written in advance by the vehicle control system;
comparing the pre-written access address with the access address of the remote control key;
if the comparison result is the same, the access address of the remote control key is judged to be written.
6. The digital key ultra-wideband ranging method of claim 1, wherein said communicating with an ultra-wideband antenna comprises:
the remote control key sends an initial ranging frame to the ultra-wideband antenna;
the ultra-bandwidth antenna sends a response ranging frame to the remote control key according to the ranging frame;
the remote control key sends a tail frame ranging frame to the ultra-bandwidth antenna;
the remote key integrates the response ranging frame to generate a feedback data frame and sends the feedback data frame to the ultra-wideband antenna.
7. The digital key ultra-wideband ranging method of claim 6, wherein the remote key transmitting an initial ranging frame to the ultra-wideband antenna comprises:
the remote control key sends a forecast frame to the ultra-bandwidth antenna;
and the remote control key sends a first frame ranging frame to the ultra-wideband antenna, and the forenotice frame and the first frame ranging frame are used as initial ranging frames.
8. The digital key ultra-wideband ranging method of claim 1, wherein the ultra-wideband antenna calculates a distance from the remote key based on itself and the ranging frame generated by the remote key, comprising:
acquiring the arrival time of the ranging frame, and calculating a time difference according to the arrival time;
calculating the flight time corresponding to the ultra-bandwidth antenna according to the time difference;
and calculating the distance between the ultra-bandwidth antenna and the remote control key according to the flight time.
9. A digital key ultra-wideband ranging system, the system comprising: a vehicle control system, a remote key, and an ultra-wideband antenna;
the vehicle control system is used for establishing connection with the remote control key and judging whether an access address of the remote control key is written or not; when the access address is written, a ranging instruction is sent to the remote control key;
the remote control key is used for responding to the ranging instruction and performing communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
the ultra-bandwidth antenna is used for calculating the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key.
10. A digital key ultrabandwidth ranging response method, the method comprising:
the vehicle control system establishes connection with the remote control key and judges whether an access address of the remote control key is written or not;
if the access address is written, the vehicle control system sends a ranging instruction to the remote control key;
the remote control key responds to the ranging instruction and performs communication interaction with the ultra-wideband antenna; the remote control key and the ultra-bandwidth antenna respectively generate a ranging frame in the communication interaction process;
the ultra-bandwidth antenna calculates the distance between the ultra-bandwidth antenna and the remote control key according to the distance measurement frame generated by the ultra-bandwidth antenna and the remote control key;
the vehicle control system controls unlocking of the vehicle according to the distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311585322.2A CN117641236A (en) | 2023-11-24 | 2023-11-24 | Digital key ultra-bandwidth ranging method, system and ranging response method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311585322.2A CN117641236A (en) | 2023-11-24 | 2023-11-24 | Digital key ultra-bandwidth ranging method, system and ranging response method |
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| CN202311585322.2A Pending CN117641236A (en) | 2023-11-24 | 2023-11-24 | Digital key ultra-bandwidth ranging method, system and ranging response method |
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| CN (1) | CN117641236A (en) |
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