A parking space searching method, RFID and communication device

Abstract

The application discloses a parking space searching method, RFID and communication equipment, and the method comprises the following steps: a vehicle user triggers an application platform to send a paging instruction to a base station arranged in a parking lot; the base station instructs an exciter to send an excitation signal and trigger information carrying a label identification to be paged to the vehicle through interaction with the exciter; when the label of the vehicle judges that the label identification carried in the received excitation signal is the same as the label identification of the vehicle, the label returns a confirmation signal to the exciter and sends antenna information of the exciter corresponding to the label to the base station; the application platform receives the label and the corresponding antenna information sent by the base station and locates the position information of the vehicle. The exciter is arranged near a parking space in the parking lot, the vehicle user triggers a car searching operation, acquires a vehicle label signal, extracts corresponding exciter information, and thus the accurate parking space position of the vehicle is calculated. The embodiment of the application can accurately acquire the parking space information and effectively help the user to quickly find the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a parking space searching method, RFID and communication device. BACKGROUND

[0002] After parking in a large parking lot for a period of time, a user often cannot quickly find the parking space. In general, a parking space searching method is used to mark the parking space according to the parking space partition mark and number of the parking lot, or to mark the vehicle parking position and mark it on a map, and the user searches for the vehicle through navigation. The first method depends on artificial memory, and if the user forgets the parking space number, the user cannot find the vehicle. The second method is limited by the positioning accuracy, and in the underground or overground sheltered area, the vehicle position cannot be accurately positioned, and the vehicle is not easy to find. SUMMARY

[0003] The purpose of the embodiment of the present application is to provide a parking space searching method, RFID and communication device, to solve the problem that the vehicle position cannot be accurately positioned in the existing parking space searching method.

[0004] In order to solve the above problem, the embodiment of the present application provides a parking space searching method, which comprises the following steps:

[0005] When a vehicle is parked in a parking lot, an exciter arranged in the parking lot reads the entry information of the vehicle, and sends the entry information to an application platform;

[0006] A user of the vehicle triggers the application platform to send a paging instruction to a base station arranged in the parking lot, and the paging instruction carries a tag identifier to be paged, and the tag identifier is obtained according to the entry information;

[0007] The base station sends a scheduling instruction to the exciter, instructing the exciter to send an excitation signal and trigger information carrying the tag identifier to be paged to the vehicle;

[0008] When the tag of the vehicle judges that the tag identifier carried by the received excitation signal is the same as the tag identifier of itself, the tag returns a confirmation signal to the exciter, and sends the antenna information of the exciter corresponding to the tag to the base station;

[0009] The application platform receives the tag and the corresponding antenna information sent by the base station, and locates the position information of the vehicle.

[0010] Further, the application platform is provided with a fingerprint library, the fingerprint library stores the corresponding relationship between the signal strength and the position information, the application platform receives the tag and the corresponding antenna information sent by the base station, and locates the position information of the vehicle, which comprises the following steps:

[0011] The application platform obtains the position information corresponding to the tag according to the signal strength of the tag sent by the base station and the correspondence;

[0012] According to the position information corresponding to the tag and the antenna position information, the position information of the vehicle is located.

[0013] The trigger of the application platform sending the paging instruction to the base station deployed inside the parking lot comprises:

[0014] The trigger of the application platform sending the paging instruction to the AMF;

[0015] The AMF sends the paging instruction to the base station deployed inside the parking lot.

[0016] The embodiment of the application further provides an RFID, which comprises a receiver, an exciter and a tag:

[0017] The receiver of the RFID receives the paging instruction sent by the application platform, and the paging instruction carries the tag identification to be paged;

[0018] The receiver sends a scheduling instruction to the exciter, instructing the exciter to send an excitation signal and trigger information carrying the tag identification to be paged to the vehicle in the parking lot;

[0019] When the tag of the RFID located on the vehicle judges that the tag identification carried by the received excitation signal is the same as the tag identification of itself, the tag returns a confirmation signal to the exciter and sends the antenna information of the exciter corresponding to the tag to the receiver;

[0020] The receiver sends the tag and the corresponding antenna information to the application platform, so that the application platform locates the position information of the vehicle.

[0021] The receiver and the exciter are separately deployed.

[0022] The exciter and the tag adopt the 920-925 frequency band and a common protocol, and the receiver and the tag adopt the 920-925 frequency band and a common protocol.

[0023] The embodiment of the application provides a parking space searching system, which comprises an application platform and the RFID as described above.

[0024] The application platform receives the entry information of the vehicle in the parking lot sent by the exciter in the RFID, carries the tag identification to be paged in the paging instruction according to the entry information of the vehicle, receives the tag and the corresponding antenna information sent by the receiver, and locates the position information of the vehicle.

[0025] The application platform is provided with a fingerprint library, the fingerprint library stores the corresponding relationship between signal strength and position information, the application platform receives the tag and the corresponding antenna information sent by the receiver, and locates the position information of the vehicle, including:

[0026] The platform obtains the position information corresponding to the tag according to the signal strength of the tag sent by the receiver and the corresponding relationship;

[0027] According to the position information corresponding to the tag and the antenna position information, the position information of the vehicle is located.

[0028] The embodiment of the application further provides a communication device, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the parking space searching method as described above when executing the computer program.

[0029] The embodiment of the application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the steps in the parking space searching method as described above.

[0030] The above technical solutions of the application have at least the following beneficial effects:

[0031] In the parking space searching method, the RFID and the communication device provided by the embodiment of the application, the exciter is arranged near the parking space of the parking lot, the vehicle user triggers the vehicle searching operation, acquires the vehicle tag signal, extracts the corresponding exciter information, and calculates the accurate parking space position of the vehicle. The embodiment of the application can accurately acquire the parking space information, and effectively helps the user to quickly find the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings described herein are used to provide further understanding of the application, and form a part of the application. The schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0033] Figure 1 The figure shows the flow chart of the parking space searching method provided by the embodiment of the application;

[0034] Figure 2 The figure shows another method flow chart of the parking space searching method provided by the embodiment of the application;

[0035] Figure 3 The figure shows the schematic diagram of the separated RFID interaction provided by the embodiment of the application;

[0036] Figure 4 The figure shows the schematic diagram of the hardware structure of the receiver provided by the embodiment of the application;

[0037] Figure 5 This diagram illustrates the hardware structure of the exciter provided in an embodiment of the present invention.

[0038] Figure 6 This diagram illustrates the instruction message sent from the base station to the exciter according to an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the parking space finding system provided in an embodiment of the present invention. Detailed Implementation

[0040] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] like Figure 1 As shown, the parking space finding method provided in this embodiment of the invention includes:

[0042] Step 101: When a vehicle is parked in the parking lot, the exciter deployed in the parking lot reads the vehicle's entry information and sends the entry information to the application platform;

[0043] In this embodiment of the invention, an actuator is deployed next to each parking space in the parking lot. When a vehicle enters the parking lot, an integrated RFID reader deployed at the entrance reads the vehicle's entry information and records it on the application platform. The platform will then create a list of vehicle entry and exit information, including license plate number, tag, vehicle model, entry time, and exit time.

[0044] The vehicle entry information includes the vehicle's license plate number, which can be entered by the user on the user platform or sent to the application platform via SMS or voice message.

[0045] Step 102: The vehicle user triggers the application platform to send a paging command to the base station deployed in the parking lot. The paging command carries the tag identifier to be paged, which is obtained based on the entry information.

[0046] In practice, the application platform searches for the corresponding tag in the established vehicle entry and exit information list based on the license plate number entered by the user when triggering the paging command, and carries the tag in the paging command.

[0047] The vehicle user triggers the application platform to send a paging command to the base station deployed in the parking lot, including: triggering the application platform to transmit the paging command to the AMF, and the AMF sending the paging command to the base station deployed in the parking lot.

[0048] Step 103: The base station sends a scheduling instruction to the exciter, instructing the exciter to send an excitation signal and trigger information carrying the tag identifier to be paged to the vehicle;

[0049] Step 104: When the label of the vehicle judges that the label identification carried by the received excitation signal is the same as the label identification of itself, the label returns a confirmation signal to the exciter and sends the antenna information of the label corresponding to the exciter to the base station.

[0050] In this step, the label of the vehicle acquires the excitation signal sent by the exciter, judges whether the label identification carried in the excitation signal is the same as the label identification of the label itself, and returns a confirmation signal, i.e., an RN16 signal, to the exciter if the label identification is the same.

[0051] Step 105: The application platform receives the label and the corresponding antenna information sent by the base station and locates the position information of the vehicle.

[0052] Specifically, the application platform is provided with a fingerprint library storing the corresponding relationship between signal strength and position information, and this step includes: the application platform obtains the position information corresponding to the label according to the signal strength of the label sent by the base station and the corresponding relationship; and locates the position information of the vehicle according to the position information corresponding to the label and the antenna position information.

[0053] The parking space finding method of the embodiment of the application has the following advantages: the exciter is deployed near the parking space, when a user pays a fee and triggers a car finding operation platform to issue a car finding signal, the Receiver of the RFID system sends a control instruction to schedule the exciter to send an excitation signal to trigger the vehicle label to feed back information, the exciter antenna information is carried at the same time, the deployment position information of the exciter antenna stored in the finding platform is found, the existing fingerprint library information is fused, the accurate information of the vehicle parking space is obtained, and therefore the platform sends the accurate parking space information of the vehicle of the user to the user, and can be fused with navigation to provide a car finding route for the user.

[0054] The embodiment of the application optimizes the functional design of the RFID system, combines the deployment of the existing base station, forms a distributed new RFID mesh system, can quickly realize productization, is convenient for industrial promotion, and can realize a large improvement in the reading and writing distance of 100 m.

[0055] As shown in Figure 2 The embodiment of the application provides a parking space finding method, which comprises the following steps:

[0056] 1. An integrated RFID reader is deployed at the entrance of the parking lot, the integrated RFID reader reads the vehicle entry information when the vehicle enters the parking lot, records the information on the application platform, and establishes a vehicle entry and exit information list on the platform, including the license plate number, electronic license plate label number (Tag), vehicle model, entry time and exit time and other information.

[0057] 2. When a user leaves the premises, they initiate a vehicle search request, which includes the vehicle's license plate information. This triggers the platform to send a vehicle search instruction to the application platform. Alternatively, when a user initiates a payment request, the platform can send a vehicle search instruction to the application platform. In this embodiment of the invention, there is no limitation on the timing of the platform's vehicle search operation. The platform can be triggered when the user leaves the premises or when the user initiates a payment request. After payment is completed, the platform will push a vehicle search route.

[0058] 3. The application platform receives the vehicle search command and sends it to AMF, triggering the network to perform the "PagingTag" process;

[0059] When a user enters the site, they register their vehicle information on the backend platform. At the same time, the vehicle information is transmitted to the AMF via a receiver for user registration and identity verification. After this process, the vehicle becomes a legitimate user of the network and can be paged in reverse by commands from the upper layer.

[0060] 4. The AMF initiates the "Paging Tag" process, sending the paging command to the base station deployed in the parking lot. The signaling contains the Tag ID of the person being paging.

[0061] like Figure 3 As shown, this embodiment of the invention deploys the receiver and exciter separately, reducing the uplink and downlink interference problem of traditional integrated RFID, effectively increasing the communication distance between the receiver and the tag (about 100m), enabling long-distance transmission, reducing terminal deployment density, and thus reducing costs.

[0062] The separated receiver and exciter support information transmission based on a public protocol, using a wired connection, and support the receiver's scheduling commands to the exciter. After receiving the receiver's command, the exciter activates the tag, and the tag feeds back the information to the receiver, completing the full information exchange process.

[0063] The hardware structure of the receiver is as follows Figure 4 As shown, the receiver provided in this embodiment of the invention reuses the baseband processing unit of a 5G base station due to the relatively simple RFID signal. It adds a radio frequency receiving unit and a receiving antenna to acquire information fed back from the tag, forming a base station-type receiver. This effectively improves the feasibility of industrialization and reduces the cost of system deployment. Since the tag needs to directly reflect the signal back to the base station, in practice, the base station needs to be upgraded with software, such as generating a virtual ID for the tag to ensure the correct transmission of tag information within the network.

[0064] The hardware structure of the exciter is as follows Figure 5As shown, the exciter only transmits a simple excitation signal, and interacts with the receiver through a wired connection, one exciter can be connected with four antennas, and through antenna extension, one exciter can activate labels through four channels at a time. The embodiment of the application considers the corresponding relationship between the antenna and the label, uses a directional antenna, and activates the label in a specific direction as accurately as possible.

[0065] 5. The base station as the receiver sends a scheduling instruction to the exciter, instructs the exciter to send an excitation signal on a specific frequency band, and activates the electronic license plate on the corresponding parking space.

[0066] The embodiment of the application considers the energy efficiency of the whole system and the interference between the exciters, and provides a scheduling scheme between the receiver and the exciter. After receiving the paging instruction, the base station first starts scheduling the exciter, and before that, the exciter is in a silent state, so as to reduce the energy consumption and improve the energy efficiency of the system.

[0067] In addition, the base station has the configuration capability for the communication parameters of the exciter, so as to coordinate the interference problem between the exciters when working at the same time.

[0068] The base station of the embodiment of the application has two functions: orderly selecting the exciter and cooperatively configuring the exciter and issuing corresponding parameters.

[0069] Regarding the orderly selection of the exciter by the base station, the base station can estimate the potential parking area of the vehicle according to the arrival time of the user, and in actual application, it can be suggested that according to the distribution of the parking lot, the user with earlier arrival time is more likely to park the vehicle in a higher floor or a region closer to the elevator, and marks the region with a higher interest degree, and then marks the interest degree value in order according to the floor height or the distance from the elevator. Therefore, the base station can first schedule the exciter in the region with a higher interest point, and then diffuse to the surrounding in order with the decrease of the interest degree value, and gradually schedule the exciter.

[0070] After the base station selects the scheduled region, the number and distribution of the exciters in the region are determined, and the communication parameters of the exciter are configured according to the idea of space division multiplexing, including exciter ID allocation, communication frequency, power control, and executed operation information, and the communication between the exciter and the label is orderly controlled, so as to avoid the mutual interference of the label return signals when multiple exciters work at the same time.

[0071] The instruction message sent by the base station to the exciter is defined as Figure 6As shown, HelperID is the device ID of the exciter itself; Communication ID is the communication ID assigned to the exciter by the base station for subsequent communication with the tag, and can be assigned by the base station; command indicates the communication instructions that the exciter should use with the tag, including read, write, and inventory; Parameters defines the parameters for communication between the exciter and the tag, including frequency, power and other information; Antenna indicates which antenna the exciter uses to send excitation information. If empty, it means that all antennas are used for excitation. If there is data, it is done according to the following rules: "00" antenna 1, "01" antenna 2, "10" antenna 3, "11" antenna 4.

[0072] 6. The exciter sends an RFID excitation signal and trigger information with a specific tag ID to the vehicle in the parking space.

[0073] 7. After receiving the excitation signal, the tag determines whether the Tag ID is the same as its own. If the Tag ID is the same, it will send the RN16 signal to the exciter.

[0074] It should be noted that existing separate RFID systems only allow the receiver to receive Tag information, but due to the timeliness requirements of RFID information exchange, this embodiment of the invention allows the exciter to receive RN16 information fed back by the RFID.

[0075] 8. After receiving the RN16 feedback from the tag, the exciter will send back ACK information;

[0076] The ACK message carries RN16 information, indicating that the TAG information has been successfully received, the link has been successfully established, and information can be received.

[0077] 9. The paged tag will send the tag information it carries to the receiver. At the same time, in order to achieve positioning capability, the tag will also send the exciter antenna information to the receiver.

[0078] 10. After receiving the TAG and corresponding antenna information, the platform combines the fingerprint database information to accurately determine the vehicle's location.

[0079] The parking space locating method provided in this embodiment of the invention involves deploying an actuator near the parking space. When a user exits and pays, the vehicle locating platform sends a vehicle locating signal, instructing the RFID system's receiver to send a control command, which schedules the actuator to send an excitation signal, triggering the vehicle tag to feed back information. Simultaneously, the exciter carries the exciter antenna information, searches for the exciter antenna deployment location information stored in the platform, and integrates it with existing fingerprint database information to obtain accurate vehicle parking space information. Thus, the application platform sends the user's accurate parking space information to the user. It can also be integrated with navigation to provide the user with a vehicle locating route.

[0080] This invention provides an RFID system, including a receiver, an actuator, and a tag:

[0081] The RFID receiver receives paging commands sent by the application platform, and the paging command carries the tag identifier to be paging;

[0082] The receiver sends a dispatch instruction to the actuator, instructing the actuator to send an excitation signal and trigger information carrying a tag identifier to be paged to the vehicles in the parking lot;

[0083] When the RFID tag located on the vehicle determines that the tag identifier carried by the received excitation signal is the same as its own tag identifier, it returns an acknowledgment signal to the exciter and sends the antenna information of the exciter corresponding to the tag to the receiver.

[0084] The receiver sends the tag and corresponding antenna information to the application platform so that the application platform can locate the vehicle's position.

[0085] like Figure 3 As shown in the embodiment of the present invention, the receiver and exciter are deployed separately, the exciter and the tag use the 920-925 frequency band and a shared protocol, and the receiver and the tag use the 920-925 frequency band and a shared protocol.

[0086] In this embodiment of the invention, after receiving a vehicle-finding signal from the application platform, the RFID system's receiver is instructed to send a control command to schedule the exciter to send an excitation signal, triggering the vehicle tag to provide feedback information. Simultaneously, the exciter antenna information is carried, and the exciter antenna deployment location information stored in the platform is searched. By integrating existing fingerprint database information, accurate vehicle parking space information is obtained. Thus, the application platform sends the user's accurate vehicle parking space information to the user. It can also be integrated with navigation to provide the user with a vehicle-finding route.

[0087] When implementing the technical solutions provided in the embodiments of the present invention, they can be implemented in the following manner.

[0088] like Figure 7 The present invention provides a parking space search system, which includes an application platform and the RFID as described above;

[0089] The application platform receives vehicle entry information from the exciter in the RFID system, and carries the tag to be paged in the paging command based on the vehicle entry information; it also receives the tag and corresponding antenna information from the receiver to locate the vehicle's position.

[0090] The application platform includes a fingerprint database that stores the correspondence between signal strength and location information. The application platform receives tags and corresponding antenna information sent by the receiver to determine the vehicle's location, including:

[0091] The platform obtains the position information corresponding to the tag according to the signal strength of the tag sent by the receiver and the corresponding relationship;

[0092] According to the position information corresponding to the tag and the antenna position information, the position information of the vehicle is located.

[0093] The parking space searching system of the embodiment of the application, the application platform receives the trigger signal of the user of the vehicle, sends a car searching signal to the RFID, instructs the receiver of the RFID system to send a control instruction, schedules the exciter to send an excitation signal, triggers the vehicle tag to feed back information, carries the exciter antenna information at the same time, searches the exciter antenna deployment position information stored in the platform memory, fuses the existing fingerprint library information, obtains the accurate information of the parking space of the vehicle, and thus the application platform sends the accurate parking space information of the vehicle of the user to the user, and can be fused with the navigation to provide the car searching route for the user.

[0094] The embodiment of the application further provides a communication device, including a memory, a processor and a computer program stored in the memory and executable on the processor, the processor executes the program to realize each process in the embodiment of the car parking space searching method and achieve the same technical effect, and details are not repeated here to avoid repetition.

[0095] The embodiment of the application further provides a computer readable storage medium, which stores a computer program, the program is executed by the processor to realize each process in the embodiment of the car parking space searching method and achieve the same technical effect, and details are not repeated here to avoid repetition. The computer readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0096] Those skilled in the art should understand that the embodiments of the application can be provided as a method, a system or a computer program product. Therefore, the application can be in the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to magnetic disk storage and optical storage) containing computer usable program code.

[0097] The present application is described in reference to the accompanying drawings, which use flow diagrams and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks.

[0098] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks. Figure 1 one or more flow or flow diagrams and / or block or blocks.

[0100] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method of parking space search, characterized by, The method comprises: When the vehicle stops in the parking lot, the exciter deployed inside the parking lot reads the entry information of the vehicle, and sends the entry information to the application platform; wherein, an exciter is deployed beside each parking space of the parking lot; The vehicle user triggers the application platform to send a paging instruction to the base station deployed inside the parking lot, and the paging instruction carries a label identifier to be paged, which is obtained according to the entry information; The base station sends a scheduling instruction to the exciter, instructing the exciter to send an excitation signal and trigger information carrying the label identifier to be paged to the vehicle; When the label of the vehicle judges that the label identifier carried by the received excitation signal is the same as the label identifier of itself, the label returns a confirmation signal to the exciter, and sends the antenna information of the exciter corresponding to the label to the base station; The application platform receives the signal strength of the label and the corresponding antenna information sent by the base station, and locates the position information of the vehicle.

2. The method of claim 1, wherein, The application platform is provided with a fingerprint library, which stores the corresponding relationship between the signal strength and the position information, and the application platform also stores the deployment position information of the exciter antenna; The application platform receives the label and the corresponding antenna information sent by the base station, and locates the position information of the vehicle, comprising: The application platform obtains the position information corresponding to the label according to the signal strength of the label sent by the base station and the corresponding relationship; According to the position information corresponding to the label and the antenna position information, the position information of the vehicle is located; wherein, the antenna position information is obtained by the application platform according to the stored deployment position information of the exciter antenna and the antenna information.

3. The method of claim 1, wherein, The trigger of the application platform to send the paging instruction to the base station deployed in the parking lot comprises: Triggering the application platform to transmit the paging instruction to the AMF; The AMF sends the paging instruction to the base station deployed in the parking lot.

4. An RFID system characterized by, The RFID system comprises a receiver, an exciter and a label: The receiver of the RFID system receives the paging instruction sent by the application platform, and the paging instruction carries a label identifier to be paged; The receiver sends a scheduling instruction to the exciter, instructing the exciter to send an excitation signal and trigger information carrying the label identifier to be paged to the vehicle in the parking lot; wherein, an exciter is deployed beside each parking space of the parking lot; The label of the RFID system located on the vehicle judges that the label identifier carried by the received excitation signal is the same as the label identifier of itself, returns a confirmation signal to the exciter, and sends the antenna information of the exciter corresponding to the label to the receiver; The receiver sends the signal strength of the label and the corresponding antenna information to the application platform, so that the application platform locates the position information of the vehicle.

5. The RFID system of claim 4, wherein, The receiver and the exciter are separately deployed.

6. The RFID system of claim 4 or 5, wherein, The 920-925 frequency band and the common protocol are adopted between the exciter and the label, and the 920-925 frequency band and the common protocol are adopted between the receiver and the label.

7. A parking space finding system, characterized in that The system comprises an application platform and an RFID system as claimed in claim 4 or 5; The application platform receives the access information of the vehicle in the parking lot sent by the exciter in the RFID system, carries the tag identification to be paged in the paging instruction according to the access information of the vehicle; receives the signal strength of the tag and the corresponding antenna information sent by the receiver, and locates the position information of the vehicle.

8. A parking space finding system according to claim 7, characterized in that The application platform is provided with a fingerprint library, the fingerprint library stores the corresponding relationship between the signal strength and the position information, and the application platform also stores the deployment position information of the exciter antenna; The application platform receives the tag and the corresponding antenna information sent by the receiver, and locates the position information of the vehicle, including: The platform obtains the position information corresponding to the tag according to the signal strength of the tag sent by the receiver and the corresponding relationship; According to the position information corresponding to the tag and the antenna position information, the position information of the vehicle is located; wherein the antenna position information is obtained by the application platform according to the stored deployment position information of the exciter antenna and the antenna information.

9. A communication device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the parking space searching method in any one of claims 1 to 3.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the parking space searching method in any one of claims 1 to 3.

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