A frequency point switching method and device, a terminal and a readable storage medium

Abstract

The application belongs to the technical field of intelligent transportation, and mainly provides a frequency point switching method and device, a terminal and a readable storage medium. The vehicle-mounted unit receives a first working mode configuration instruction sent by a first charging roadside unit located at an entrance of an extended service communication section, and enters a periodic switching frequency point working mode according to the first working mode configuration instruction until a second working mode configuration instruction sent by a second charging roadside unit located at an exit of the extended service communication section is received, and then enters a normal working mode. Therefore, the vehicle-mounted unit can smoothly complete the ETC charging function and the extended service function on a section where charging signals and extended service signals exist simultaneously, and the priority of the charging signals can be ensured to be higher than that of the extended service signals. Meanwhile, the communication quality of the vehicle-mounted unit is not affected by the environmental temperature, and the vehicle-mounted unit does not need to increase chips and components, so that the cost and size of the vehicle-mounted unit are not increased.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of intelligent transportation, and particularly relates to a frequency point switching method and device, a terminal and a readable storage medium. BACKGROUND

[0002] With the development and maturity of 5.8GHz Dedicated Short Range Communication (DSRC), its services have been widely used in the fields of transportation and high-speed toll collection. In the current Electronic Toll Collection (ETC) system, the Rode Side Unit (RSU) and the On Board Unit (OBU) establish a link and then perform one-to-one communication. This communication mode is not good when there is traffic congestion or signal interference in the communication environment.

[0003] In order to further improve the communication rate and parallel communication capability, there are mainly two methods in the related art to achieve the above-mentioned purposes. The first method is that the antenna of the road side unit transmits signals of different communication frequencies, and divides time windows. The on-board unit selects available time windows and communication frequencies to establish a link with the road side unit and performs data communication. The second method is that the on-board unit chip register control word is adjusted by means of sensing by a sensor (such as a temperature sensor) to change the radio frequency indicators, so as to adjust the communication area and communication distance of the on-board unit.

[0004] However, in the first method, when the 5.8G radio frequency bandwidth is divided into multiple communication frequencies and time windows for the OBU to select, since the OBU radio frequency indicators and frequencies are not adjusted, the OBU is prone to not matching the OBU radio frequency indicators and frequencies, resulting in poor communication quality in some frequency points and time windows, and even communication failure. In addition, the way of randomly selecting the OBU from the 5.8G radio frequency bandwidth divided into multiple communication frequencies and time windows cannot guarantee the priority access of the signals of the communication frequency with higher priority.

[0005] In the second method, the sensing unit such as the temperature sensor has high requirements for the surrounding environment, and the error of the adjusted radio frequency chip indicators is large, which is prone to affect the communication quality between the road side unit and the on-board unit. In addition, it needs to increase chips and components on the hardware circuit to improve the communication effect, which increases the use cost, and also causes the size of the on-board unit to increase, affecting the user experience. SUMMARY

[0006] The application provides a frequency point switching method and device, a terminal and a readable storage medium, which can enable a vehicle-mounted unit to successfully complete ETC charging function and extended service function in a road section where charging signals and extended service signals exist simultaneously, and can ensure that the priority of the charging signals is higher than that of the extended service signals, and the communication quality of the vehicle-mounted unit is not affected by the environment temperature, without increasing chips, components, and the cost and size of the vehicle-mounted unit.

[0007] The first aspect of the embodiment of the application provides a frequency point switching method applied to a vehicle-mounted unit, and the frequency point switching method comprises the following steps.

[0008] receiving a first working mode configuration instruction sent by a first charging road side unit located at an entrance of an extended service communication road section;

[0009] entering a periodic switching frequency point working mode according to the first working mode configuration instruction, and entering a normal working mode according to a second working mode configuration instruction sent by a second charging road side unit located at an exit of the extended service communication road section when the second working mode configuration instruction is received;

[0010] In the periodic switching frequency point working mode, the vehicle-mounted unit cyclically performs the following frequency point switching actions: entering a sleep state based on a charging frequency point, and performing charging detection based on the charging frequency point after the sleep state lasts for a first preset time length; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, entering the cycle of the next frequency point switching action after radio frequency reception based on an extended service frequency point lasts for a third preset time length; if the charging signal is detected, re-entering the sleep state based on the charging frequency point, and entering the cycle of the next frequency point switching action when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction.

[0011] In the normal working mode, the vehicle-mounted unit enters the sleep state based on the charging frequency point.

[0012] The second aspect of the embodiment of the application further provides a frequency point switching device, which is configured in a vehicle-mounted unit and comprises the following components.

[0013] a receiving unit configured to receive a first working mode configuration instruction sent by a first charging road side unit located at an entrance of an extended service communication road section;

[0014] a switching unit configured to enter a periodic switching frequency point working mode according to the first working mode configuration instruction, and enter a normal working mode according to a second working mode configuration instruction sent by a second charging road side unit located at an exit of the extended service communication road section when the second working mode configuration instruction is received;

[0015] The vehicle-mounted unit, in the cycle switching frequency point working mode, cyclically performs the following frequency point switching actions: entering a sleep state based on a charging frequency point, and after the sleep state lasts for a first preset time length, performing charging detection based on the charging frequency point; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, then after performing radio frequency reception based on an extended service frequency point for a third preset time length, entering the cycle of the next frequency point switching action; if the charging signal is detected, then re-entering the sleep state based on the charging frequency point, and when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction, entering the cycle of the next frequency point switching action.

[0016] The vehicle-mounted unit, in the normal working mode, enters the sleep state based on the charging frequency point.

[0017] The third aspect of the embodiment of the present application provides a terminal, which comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the steps of the frequency point switching method in the first aspect are implemented.

[0018] The fourth aspect of the embodiment of the present application provides a computer readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the steps of the frequency point switching method in the first aspect are implemented.

[0019] In the embodiment of the present application, the vehicle-mounted unit receives a first working mode configuration instruction sent by a first charging roadside unit located at an entrance of an extended service communication section, and enters a cycle switching frequency point working mode until a second working mode configuration instruction sent by a second charging roadside unit located at an exit of the extended service communication section is received, and then enters a normal working mode; so that the vehicle-mounted unit can successfully complete the ETC charging function and the extended service function on a section where a charging signal and an extended service signal exist at the same time, and can ensure that the priority of the charging signal is higher than that of the extended service signal, and at the same time, the communication quality of the vehicle-mounted unit is not affected by the environmental temperature, without the need to increase chips and components, and without increasing the cost and size of the vehicle-mounted unit. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the frequency point switching system provided by the embodiment of the present application is shown.

[0021] Figure 2 The implementation flowchart of the frequency point switching method provided by the embodiment of the present application is shown.

[0022] Figure 3aA first working process schematic diagram of a vehicle-mounted unit in a frequency point periodic switching working mode is provided for an embodiment of the present application.

[0023] Figure 3b A second working process schematic diagram of a vehicle-mounted unit in a frequency point periodic switching working mode is provided for an embodiment of the present application.

[0024] Figure 4 A specific implementation flow schematic diagram of step 202 of the frequency point switching method provided for an embodiment of the present application.

[0025] Figure 5 A structure schematic diagram of a frequency point switching device provided for an embodiment of the present application.

[0026] Figure 6 A schematic diagram of a terminal provided for an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0028] It should be understood that in the present application specification and the appended claims, the term "comprising" indicates the presence of the described features, whole, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0029] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In the present application specification, the reference "one embodiment" or "some embodiments" means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in the present specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized.

[0031] In order to facilitate the understanding of those skilled in the art, the scheme of the present application is described below by way of embodiments.

[0032] As Figure 1As shown, a structure schematic diagram of a frequency point switching system provided by an embodiment of the present application can include an on-board unit (OBU) 11, a toll roadside unit (RSU) 12, and an extended service roadside unit (RSU) 13.

[0033] The on-board unit 11 can be a single ASK radio frequency chip on-board unit (OBU), which can be deployed on a vehicle in a front-mounted or rear-mounted manner, and the on-board unit is an intelligent device capable of realizing frequency point switching based on a software manner.

[0034] Specifically, the on-board unit can be communicatively connected with the toll roadside unit based on a toll frequency point to provide an ETC toll function for the vehicle, and communicatively connected with the extended service roadside unit based on an extended service frequency point to provide an extended service function such as safety assistance and information broadcasting for the vehicle.

[0035] The toll roadside unit 12 is a gantry or roadside unit deployed on a high-speed ETC extended service communication road section, supports ETC communication with an OBU having a frequency point at a toll frequency point, and can issue a working mode configuration instruction to a single ASK radio frequency chip on-board unit. The communication frequency band is: uplink 5.79 GHz, downlink 5.83 GHz.

[0036] The extended service roadside unit is a gantry or roadside unit deployed on a high-speed ETC extended service communication road section, supports ETC communication with an OBU having a frequency point at an extended service frequency point, and can issue an extended service safety assistance, information service, and instruction to a single ASK radio frequency chip on-board unit. The communication frequency band is: uplink 5.82 GHz, downlink 5.78 GHz.

[0037] Optionally, the toll roadside unit and the extended service roadside unit can also be connected with an ETC extended service system 14, which is deployed in a road section management center or a provincial management center, is responsible for receiving, integrating, and storing vehicle basic information sent by each roadside unit, has the function of generating and issuing safety assistance voice broadcast information, and in addition, supports monitoring the working state of the roadside unit, and provides remote maintenance operations such as upgrading, configuring, and alarm processing of each roadside device.

[0038] It should be noted that, since the extended service signal is used for real-time broadcast of highway traffic information and auxiliary strategy prompt, the communication distance of the extended service signal is 800m-1000m, while the toll signal needs to be used for highway mileage toll and path restoration, and the communication distance of the toll signal is relatively short, usually within 100m, and the toll detection distance is only 200-300m, therefore, the priority of the toll signal needs to be higher than that of the extended service signal.

[0039] In the related art, when the vehicle-mounted unit drives in a road section where the toll signal and the extended service signal exist at the same time, the vehicle-mounted unit is prone to have some frequency points and time windows with poor communication quality, or even unable to communicate, due to the mismatch of the radio frequency indicators and frequency points of the vehicle-mounted unit, and the priority access of the signal of the communication frequency point with higher priority (for example, the toll signal mentioned above) cannot be guaranteed.

[0040] Based on this, the embodiment of the present application provides a frequency point switching method, device, terminal and readable storage medium, the vehicle-mounted unit receives the first working mode configuration instruction sent by the first toll roadside unit located at the entrance of the extended service communication road section, and enters the periodic switching frequency point working mode according to the first working mode configuration instruction, until the second working mode configuration instruction sent by the second toll roadside unit located at the exit of the extended service communication road section is received, and then enters the normal working mode; so that the vehicle-mounted unit can successfully complete the ETC toll function and the extended service function in the road section where the toll signal and the extended service signal exist at the same time, and the priority of the toll signal can be guaranteed to be higher than that of the extended service signal, at the same time, the communication quality of the vehicle-mounted unit is not affected by the environmental temperature, without the need to increase the chip and components, and the cost and size of the vehicle-mounted unit will not be increased.

[0041] For example, as shown in Figure 2 The frequency point switching method provided by the embodiment of the present application is applied to the vehicle-mounted unit in the frequency point switching system, and can be executed by the frequency point switching device on the vehicle-mounted unit, and includes the following steps 201 to 202. For the convenience of description, the vehicle-mounted unit is taken as an example of a single ASK radio frequency chip vehicle-mounted unit.

[0042] Step 201, receiving the first working mode configuration instruction sent by the first toll roadside unit located at the entrance of the extended service communication road section.

[0043] Optionally, in the present application, the first working mode configuration instruction can carry one or more physical layer parameter configuration information such as target switching frequency point, receiving sensitivity and transmitting sensitivity.

[0044] Step 202, enter the cycle switching frequency point working mode according to the first working mode configuration instruction until receiving the second working mode configuration instruction sent by the second toll roadside unit located at the exit of the extended service communication section, and enter the normal working mode according to the second working mode configuration instruction.

[0045] Before implementing the frequency point switching method of the present application, toll roadside units need to be deployed in advance on the gantry or both sides of the road of the conventional ETC toll section, toll roadside units and extended service roadside units need to be deployed in the extended service communication section, and a vehicle-mounted unit supporting frequency point switching needs to be installed on the vehicle. Before installation, the vehicle-mounted unit needs to be issued, binding the vehicle information and the vehicle owner's charging account information, combined with anti-disassembly technology to avoid malicious tampering, for realizing the ETC charging function and the extended service function of the vehicle.

[0046] In order to ensure the real-time performance of the extended service communication, the deployment interval of the above-mentioned extended service roadside unit is less than 1km.

[0047] Further, in order to ensure that the vehicle-mounted unit can communicate with the toll roadside unit in time and realize frequency point switching after entering the extended service communication section, during the process of deploying the above-mentioned toll roadside unit in the extended service communication section, a first toll roadside unit needs to be deployed at the entrance of the extended service communication section to send a first working mode configuration instruction to the vehicle-mounted unit, so that the vehicle-mounted unit can enter the cycle switching frequency point working mode according to the first working mode configuration instruction at the entrance of the extended service communication section, and then the vehicle-mounted unit can smoothly complete the ETC charging function and the extended service function in the section where the toll signal and the extended service signal exist at the same time, while ensuring that the priority of the toll signal is higher than that of the extended service signal.

[0048] In addition, in order to enable the vehicle to switch the working mode back to the normal working mode before leaving the extended service communication section, avoiding frequency point mismatch and power waste, the present application also needs to deploy a second toll roadside unit at the exit of the extended service communication section to send a second working mode configuration instruction to the vehicle-mounted unit, so that the vehicle-mounted unit can enter the normal working mode according to the second working mode configuration instruction at the exit of the extended service communication section.

[0049] Specifically, when the vehicle drives out of the extended service communication section, the second toll roadside unit deployed at the exit of the extended service communication section sends a second working mode configuration instruction to the vehicle-mounted unit, so that the vehicle-mounted unit can perform frequency point switching configuration according to the second working mode configuration instruction at the exit of the extended service communication section and enter the normal working mode.

[0050] In the embodiment of the present application, the above-mentioned normal working mode refers to the working mode in which the vehicle-mounted unit enters the sleep state based on the toll frequency point.

[0051] In the embodiment of the present application, the vehicle-mounted unit supports being woken up by the toll roadside unit in the above-mentioned dormant state and performing the toll transaction, and the vehicle-mounted unit is in a low-power consumption state when it is dormant.

[0052] In one application, the vehicle equipped with the single-ASK radio frequency chip OBU enters a highway, and the gantry and the lane-deployed toll RSU normally communicates with the vehicle-mounted unit in uplink 5.79 GHz and downlink 5.83 GHz frequency points. When the vehicle travels to the entrance of the extended service communication section, the first toll RSU deployed at the entrance of the extended service communication section will issue a configuration instruction (i.e., the above-mentioned first working mode configuration instruction) of switching the working mode to the vehicle-mounted unit. After the vehicle-mounted unit receives the first working mode configuration instruction, it performs frequency point switching configuration according to the first working mode configuration instruction, and then works in the periodic switching frequency point working mode.

[0053] In the embodiment of the present application, the vehicle-mounted unit performs the following steps A1 to A4 of frequency point switching actions in the periodic switching frequency point working mode:

[0054] A1: Entering a dormant state based on the toll frequency point;

[0055] A2: After the dormant state lasts for a first preset time length, performing toll detection based on the toll frequency point;

[0056] A3: In the toll detection process, if no toll signal is detected and the toll detection has lasted for a second preset time length, after performing radio frequency reception based on the extended service frequency point for a third preset time length, the next cycle of frequency point switching action is entered, i.e., returning to perform step A1.

[0057] A4: If a toll signal is detected, the dormant state is re-entered based on the toll frequency point, and when the dormant state has lasted for a fourth preset time length or the vehicle-mounted unit has completed the toll transaction, the next cycle of frequency point switching action is entered, i.e., returning to perform step A1.

[0058] Optionally, in some embodiments of the present application, the values of the first preset time length, the second preset time length, the third preset time length and the fourth preset time length can be obtained according to practical experience.

[0059] The specific working process of the vehicle-mounted unit in the periodic switching frequency point working mode will be described below with Figure 3a and Figure 3b as examples, taking the first preset time length as 1s, the second preset time length as 30ms, the third preset time length as 30ms, and the fourth preset time length as 20ms as examples.

[0060] When the vehicle travels on the extended service communication section, the vehicle is in a cycle switching frequency point working mode. In the cycle switching frequency point working mode, the on-board unit first sleeps for 1 s based on the charging frequency point, and then starts a 30-ms charging detection based on the charging frequency point. If no charging signal is detected, the on-board unit switches to the extended charging frequency point and receives a 30-ms extended service signal, and then returns to the 1-s sleep based on the charging frequency point. If the charging signal is detected, the on-board unit skips the reception of the extended service signal, directly enters the sleep state based on the charging frequency point, and when the sleep duration reaches 20 ms or after completing the charging transaction, the on-board unit returns to the 1-s sleep based on the charging frequency point until the vehicle exits the extended service communication section.

[0061] In the cycle switching frequency point working mode, the on-board unit first sleeps for 1 s based on the charging frequency point, and then starts a 30-ms charging detection based on the charging frequency point. If no charging signal is detected, the on-board unit switches to the extended charging frequency point and receives a 30-ms extended service signal, and then returns to the 1-s sleep based on the charging frequency point. If the charging signal is detected, the on-board unit skips the reception of the extended service signal, directly enters the sleep state based on the charging frequency point, and when the sleep duration reaches 20 ms or after completing the charging transaction, the on-board unit returns to the 1-s sleep based on the charging frequency point until the vehicle exits the extended service communication section.

[0062] In the cycle switching frequency point working mode, the on-board unit first sleeps for 1 s based on the charging frequency point, and then starts a 30-ms charging detection based on the charging frequency point. If no charging signal is detected, the on-board unit switches to the extended charging frequency point and receives a 30-ms extended service signal, and then returns to the 1-s sleep based on the charging frequency point. If the charging signal is detected, the on-board unit skips the reception of the extended service signal, directly enters the sleep state based on the charging frequency point, and when the sleep duration reaches 20 ms or after completing the charging transaction, the on-board unit returns to the 1-s sleep based on the charging frequency point until the vehicle exits the extended service communication section.

[0063] In some embodiments of the present application, the fourth preset time period can be determined based on the detection distance of the charging detection and the minimum driving speed of the vehicle.

[0064] For example, the charging detection distance is 300 m, and the driving speed of the vehicle is 60 km / h ≈ 16.7 m / s. Therefore, the fourth preset time period can be 300 m / 16.7 m / s = 18 s.

[0065] That is, if the charging signal is detected during the charging detection, the on-board unit can sleep for 18 s based on the charging frequency point or after completing the charging transaction, and then re-enter the cycle of the next frequency switching action.

[0066] In order to avoid the problem that the vehicle-mounted unit cannot normally enter the periodic switching frequency point working mode due to the fact that the first working mode configuration instruction issued by the first toll roadside unit is not received at the entrance of the extended service communication road section because of interference and other factors, optionally, in some embodiments of the present application, the above-mentioned frequency point switching method further comprises: receiving the first working mode configuration instruction sent by the third toll roadside unit, so that the vehicle-mounted unit can also receive the first working mode configuration instruction when driving to the next toll roadside unit (the third toll roadside unit).

[0067] The third toll roadside unit is a toll roadside unit in the extended service communication road section at a preset distance from the entrance of the extended service communication road section.

[0068] Similarly, in order to avoid the problem that the vehicle-mounted unit cannot normally switch back to the normal working mode due to the fact that the second working mode configuration instruction issued by the second toll roadside unit is not received at the exit of the extended service communication road section because of interference and other factors, optionally, in some embodiments of the present application, the vehicle-mounted unit in the periodic switching frequency point working mode further comprises: receiving the second working mode configuration instruction sent by the fourth toll roadside unit, so that the vehicle-mounted unit can also receive the second working mode configuration instruction when driving to the next toll roadside unit (the fourth toll roadside unit).

[0069] The fourth toll roadside unit is a toll roadside unit in the regular toll road section at a preset distance from the exit of the extended service communication road section.

[0070] The above-mentioned preset distance can be obtained according to actual experience, for example, the value range of the above-mentioned preset distance can be -100m~100m.

[0071] Optionally, in some other embodiments of the present application, as shown in Figure 4 In order to avoid the problem that the vehicle-mounted unit cannot normally switch back to the normal working mode due to the fact that the second working mode configuration instruction is not received at the exit of the extended service communication road section because of interference and other factors, the vehicle-mounted unit in the above-mentioned periodic switching frequency point working mode further comprises: performing the method of steps 401 to 402.

[0072] Step 401: detecting whether the duration that the vehicle-mounted unit does not receive the extended service signal in the periodic switching frequency point working mode reaches a fifth preset duration;

[0073] Step 402: if the duration that the vehicle-mounted unit does not receive the extended service signal in the periodic switching frequency point working mode reaches the fifth preset duration, controlling the vehicle-mounted unit to enter the normal working mode.

[0074] The fifth preset time length can be obtained according to practical experience, for example, the fifth preset time length can be 30 minutes.

[0075] In the embodiment of the application, when it is detected that the vehicle-mounted unit does not receive the extended service signal for a continuous time length reaching the fifth preset time length in the periodic frequency point switching mode, it is determined that the vehicle has exited the extended service communication section, and the vehicle-mounted unit is controlled to stop working in the periodic frequency point switching mode and enter the normal working mode, thereby effectively avoiding the problem that the vehicle-mounted unit cannot normally switch back to the normal working mode due to not receiving the second working mode configuration instruction at the exit of the extended service communication section because of interference and other factors.

[0076] Optionally, in some embodiments of the application, in the process of radio frequency reception based on the extended service frequency point for the third preset time length in step 202, if the vehicle-mounted unit completes the extended service transaction in advance within the third preset time length, the vehicle-mounted unit can also determine the extended service suppression time length of the vehicle-mounted unit based on the distance between the vehicle-mounted unit and the extended service roadside unit when the vehicle-mounted unit completes the extended service transaction and the minimum driving speed of the vehicle, and enter the sleep state based on the toll frequency point until the sleep state has lasted for the extended service suppression time length, and then enter the cycle of the next frequency point switching action, so as to realize the priority access of the toll signal.

[0077] Specifically, in actual application, in the section covered by the toll signal and the extended service signal (i.e., the extended service communication section), since the communication distance of the extended service signal is 800m-1000m and the communication distance of the toll signal is 100m-300m, the vehicle-mounted unit usually accesses the extended service signal for transaction when it is far away from the roadside unit and accesses the toll signal for transaction when it is close to the roadside unit. Based on this, in the embodiment of the application, the vehicle-mounted unit can switch to the sleep state in advance when it completes the extended service transaction in advance, so as to realize the priority access of the toll signal.

[0078] For example, the vehicle completes the extended service communication at a distance of 800m from the extended service roadside unit. Considering that the toll roadside unit can also be deployed in the front 800m, it is necessary to try to ensure that the extended service transaction is not accessed in this 800m section, so as to realize the priority access of the toll signal.

[0079] It is known that the minimum speed of the expressway is 60km / h≈16.7m / s, and 800m / 16.7m / s=48s, so the vehicle-mounted unit can stop the frequency point switching mode 48s after the successful extended service transaction, keep the sleep state under the toll frequency point, and then enter the cycle of the next frequency point switching action after the sleep time length reaches 48s.

[0080] Based on the frequency switching method in each of the above embodiments, the OBU with only one ASK radio frequency chip can adjust the vehicle-mounted unit chip register control word to change the various radio frequency indicators and frequencies when it is in a signal section with different frequencies, so that the physical layer indicators match the toll roadside units and the extended service roadside units of the driving section, thereby performing normal transactions. By relying on the configuration issued by the toll roadside unit to replace the sensor to change the radio frequency indicators, the influence of environmental factors can be avoided, and the frequency, receiving sensitivity and transmitting sensitivity of the OBU after configuration are more stable and accurate. When the single-chip OBU does not receive the configuration instruction issued by the roadside unit due to interference and other factors, it has a complete software identification solution to ensure normal switching of the OBU, so that the OBU has the ability to process toll signals and extended service signals, supports normal communication and toll services on the ETC toll section, and proposes a signal processing algorithm applied to the scenario where the extended service signal and the toll signal exist simultaneously to ensure that the toll signal has priority access. Support for providing real-time extended service voice broadcast services for users on the ETC extended service communication section without affecting normal toll services. The software level realizes the frequency switching of the single-chip OBU, which does not need to increase the chip and components, reduces the cost, and does not need to increase the size of the OBU, which improves the user experience.

[0081] The embodiment of the present application also provides a frequency switching device 500, which is configured in a vehicle-mounted unit and includes a receiving unit 501 and a switching unit 502.

[0082] The receiving unit 501 is used to receive a first working mode configuration instruction sent by a first toll roadside unit located at the entrance of an extended service communication section.

[0083] The switching unit 502 is used to enter a periodic switching frequency working mode according to the first working mode configuration instruction, and enter a normal working mode according to a second working mode configuration instruction sent by a second toll roadside unit located at the exit of the extended service communication section when the first working mode configuration instruction is received.

[0084] The vehicle-mounted unit, in the cycle frequency switching mode, cyclically performs the following frequency switching actions: entering a sleep state based on a charging frequency, and after the sleep state lasts for a first preset time length, performing charging detection based on the charging frequency; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, then after performing radio frequency reception based on an extended service frequency for a third preset time length, entering the cycle of the next frequency switching action; if the charging signal is detected, then re-entering the sleep state based on the charging frequency, and when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction, entering the cycle of the next frequency switching action.

[0085] The vehicle-mounted unit, in the normal operation mode, enters the sleep state based on the charging frequency.

[0086] Optionally, in some embodiments of the present application, the receiving unit is further configured to receive the first operation mode configuration instruction sent by the third charging roadside unit; and the third charging roadside unit is a charging roadside unit in the extended service communication road section and located at a preset distance from an entrance of the extended service communication road section.

[0087] It should be noted that, for the convenience and brevity of description, the specific working process of the above-described frequency switching method can refer to the description of the frequency switching device in the above embodiments, which will not be described here. Moreover, it should be noted that the above embodiments can be combined with each other to obtain various different embodiments, which all belong to the protection scope of the present application.

[0088] As shown in Figure 6 The present application also provides a terminal. The terminal can be applied to the frequency switching device shown in the above embodiments, and the terminal can be a server, a computer, an electric vehicle, or the like. As shown in Figure 6 The terminal 6 can include a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. The processor 60 implements the steps in the above-described frequency switching method embodiments when executing the computer program 62, for example, Figure 2 Steps 201 to 202 shown in

[0089] The processor 60 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor, or any conventional processor, etc.

[0090] The memory 61 can be an internal storage unit of the terminal 6, for example, a hard disk or a memory. The memory 61 can also be an external storage device for the terminal 6, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 6. Further, the memory 61 can also include both the internal storage unit and the external storage device of the terminal 6. The memory 61 is used to store the above computer program and other programs and data required by the terminal.

[0091] The above computer program can be divided into one or more units, and the above one or more units are stored in the above memory 61 and executed by the above processor 60 to complete the present application. The above one or more units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the process of the above computer program executing the above frequency point switching method in the terminal. For example, the above computer program can be divided into a receiving unit and a switching unit, and the specific functions are as follows:

[0092] The receiving unit is configured to receive a first working mode configuration instruction sent by a first charging roadside unit located at the entrance of the extended service communication section;

[0093] The switching unit is configured to enter a periodic frequency point switching working mode according to the first working mode configuration instruction, and enter a normal working mode according to a second working mode configuration instruction sent by a second charging roadside unit located at the exit of the extended service communication section when the second working mode configuration instruction is received;

[0094] The vehicle-mounted unit, in the cycle frequency point switching mode, cyclically performs the following frequency point switching actions: entering a sleep state based on a charging frequency point, and after the sleep state lasts for a first preset time length, performing charging detection based on the charging frequency point; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, then after performing radio frequency reception based on an extended service frequency point for a third preset time length, entering the cycle of the next frequency point switching action; if the charging signal is detected, then re-entering the sleep state based on the charging frequency point, and when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction, entering the cycle of the next frequency point switching action.

[0095] The vehicle-mounted unit, in the normal operation mode, enters the sleep state based on the charging frequency point.

[0096] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual applications, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction, and do not limit the protection scope of the application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0097] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0098] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0099] In the embodiments provided by the present application, it should be understood that the disclosed terminal and method can be implemented in other manners. For example, the terminal embodiments described above are merely schematic. For example, the division of the modules or units is merely logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0100] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0101] In addition, each functional unit in the various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0102] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, all or part of the flow of the method in the above embodiments can also be implemented by a computer program instructing related hardware to complete, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of the various method embodiments described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer readable medium can include appropriate contents according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0103] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A frequency point switching method applied to a vehicle-mounted unit, characterized in that, The frequency point switching method comprises: receiving a first working mode configuration instruction sent by a first charging roadside unit located at an entrance of an extended service communication section; entering a periodic switching frequency point working mode according to the first working mode configuration instruction, and entering a normal working mode according to a second working mode configuration instruction sent by a second charging roadside unit located at an exit of the extended service communication section; wherein, in the periodic switching frequency point working mode, the vehicle-mounted unit cyclically executes the following frequency point switching actions: entering a sleep state based on a charging frequency point, and after the sleep state lasts for a first preset time length, performing charging detection based on the charging frequency point; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, after performing radio frequency reception based on an extended service frequency point for a third preset time length, entering the cycle of the next frequency point switching action; if the charging signal is detected, re-entering the sleep state based on the charging frequency point, and when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction, entering the cycle of the next frequency point switching action; in the normal working mode, the vehicle-mounted unit enters the sleep state based on the charging frequency point; in the process of cyclically executing the frequency point switching actions in the periodic switching frequency point working mode, the vehicle-mounted unit further comprises: detecting whether the duration that the vehicle-mounted unit does not receive an extended service signal in the periodic switching frequency point working mode reaches a fifth preset time length; if the duration that the vehicle-mounted unit does not receive the extended service signal in the periodic switching frequency point working mode reaches the fifth preset time length, controlling the vehicle-mounted unit to enter the normal working mode; in the process of performing radio frequency reception based on the extended service frequency point for the third preset time length, comprising: if the vehicle-mounted unit completes an extended service transaction in advance within the third preset time length, determining an extended service suppression time length of the vehicle-mounted unit based on the distance between the vehicle-mounted unit and the extended service roadside unit when the vehicle-mounted unit completes the extended service transaction and the minimum driving speed of the vehicle, and entering the sleep state based on the charging frequency point until the sleep state has lasted for the extended service suppression time length, and entering the cycle of the next frequency point switching action.

2. The frequency point switching method of claim 1, wherein, The frequency point switching method further comprises: receiving the first working mode configuration instruction sent by a third charging roadside unit; the third charging roadside unit is a charging roadside unit in the extended service communication section at a preset distance from the entrance of the extended service communication section. 3.The frequency point switching method of claim 1, wherein, in the process of cyclically executing the frequency point switching actions in the periodic switching frequency point working mode, the vehicle-mounted unit further comprises: receiving the second working mode configuration instruction sent by a fourth charging roadside unit; the fourth charging roadside unit is a charging roadside unit in a regular charging section at a preset distance from the exit of the extended service communication section.

4. The frequency switching method of any one of claims 1-3, wherein, The fourth preset time length is determined based on the detection distance of the charging detection and the minimum driving speed of the vehicle.

5. A frequency switching device configured in a vehicle-mounted unit, characterized by comprising: The frequency point switching device comprises: The receiving unit is configured to receive a first working mode configuration instruction sent by a first charging roadside unit located at an entrance of an extended service communication road section; The switching unit is configured to enter a periodic frequency switching mode according to the first working mode configuration instruction, and enter a normal working mode according to a second working mode configuration instruction sent by a second charging roadside unit located at an exit of the extended service communication road section. In the periodic frequency switching mode, the vehicle-mounted unit cyclically performs the following frequency switching actions: entering a sleep state based on a charging frequency, and performing charging detection based on the charging frequency after the sleep state lasts for a first preset time length; in the charging detection process, if no charging signal is detected and the charging detection has lasted for a second preset time length, then after performing radio frequency reception based on an extended service frequency for a third preset time length, the vehicle-mounted unit enters the cycle of the next frequency switching action; if the charging signal is detected, the vehicle-mounted unit reenters the sleep state based on the charging frequency, and enters the cycle of the next frequency switching action when the sleep state has lasted for a fourth preset time length or the vehicle-mounted unit has completed a charging transaction. In the normal working mode, the vehicle-mounted unit enters the sleep state based on the charging frequency. In the cycle of the frequency switching actions performed by the vehicle-mounted unit in the periodic frequency switching mode, the following steps are further included: detecting whether a duration that the vehicle-mounted unit does not receive an extended service signal in the periodic frequency switching mode reaches a fifth preset time length; if the duration that the vehicle-mounted unit does not receive the extended service signal in the periodic frequency switching mode reaches the fifth preset time length, controlling the vehicle-mounted unit to enter the normal working mode; in the process of performing radio frequency reception based on the extended service frequency for the third preset time length, the following steps are further included: if the vehicle-mounted unit completes an extended service transaction before the third preset time length, determining an extended service suppression time length of the vehicle-mounted unit based on a distance between the vehicle-mounted unit and an extended service roadside unit when the vehicle-mounted unit completes the extended service transaction and a minimum driving speed of the vehicle, and entering a sleep state based on the charging frequency until the sleep state has lasted for the extended service suppression time length, and then entering the cycle of the next frequency switching action.

6. The frequency switching apparatus of claim 5, wherein, The receiving unit is further configured to receive the first working mode configuration instruction sent by a third charging roadside unit located at a preset distance from the entrance of the extended service communication road section.

7. A terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The computer program, when executed by a processor, implements the steps of the frequency switching method according to any one of claims 1-4.

8. A computer-readable storage medium comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein, The computer program, when executed by a processor, implements the steps of the frequency switching method according to any one of claims 1-4.

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