CN110809250B - Method for communication between read-write terminal and N vehicle-mounted units and read-write terminal - Google Patents
Method for communication between read-write terminal and N vehicle-mounted units and read-write terminal Download PDFInfo
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- CN110809250B CN110809250B CN201910848374.1A CN201910848374A CN110809250B CN 110809250 B CN110809250 B CN 110809250B CN 201910848374 A CN201910848374 A CN 201910848374A CN 110809250 B CN110809250 B CN 110809250B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a method for communication between a read-write terminal and N vehicle-mounted units and the read-write terminal, wherein channels of 5.8GHz frequency bands of the N vehicle-mounted units are in an open state, and the method comprises the following steps: the read-write terminal acquires the physical addresses of the N vehicle-mounted units in a preset mode and generates a physical address list; the read-write terminal sends wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band; the read-write terminal sequentially establishes communication connection with the N vehicle-mounted units through a 5.8GHz frequency band according to the physical address list, and after communication connection is established with the vehicle-mounted unit corresponding to the ith physical address of the physical address list each time, ith data is sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, wherein i is more than or equal to 1 and less than or equal to N; and the read-write terminal sequentially sends jth confirmation data to the vehicle-mounted unit corresponding to the jth physical address of the physical address list through a 5.8GHz frequency band according to the physical address list, wherein j is more than or equal to 1 and is less than or equal to N. By the method, the working efficiency of the 5.8GHz read-write terminal can be improved.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a method for communication between a read-write terminal and N vehicle-mounted units and the read-write terminal.
Background
An Electronic Toll Collection (ETC) system performs charging by performing 5.8GHz communication and information exchange between antennas of an On Board Unit (OBU) and a roadside unit (RSU) mounted On a vehicle. The OBU stores vehicle identification information and is typically mounted on the windshield in front of the vehicle, and the RSU is typically mounted on the roadside of the toll station.
In the prior art, when the road side unit executes the operations of issuing, upgrading the system, managing the warehouse and the like of the vehicle-mounted unit, the vehicle-mounted unit needs to be operated one by one, and the time difference caused by the large difference between the time required by data transmission and processing of the road side unit and the vehicle-mounted unit causes the overlong time consumption and low efficiency of the road side unit when the operations are executed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for communication between a read-write terminal and N vehicle-mounted units and the read-write terminal.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides a method for communication between a read-write terminal and N vehicle-mounted units, wherein channels of 5.8GHz frequency bands of the N vehicle-mounted units are in an open state, and the method comprises the following steps:
the read-write terminal acquires physical addresses of N vehicle-mounted units in a preset mode and generates a physical address list, wherein the preset mode does not include a 5.8GHz frequency band, the physical address list includes the physical addresses of the N vehicle-mounted units, N is more than or equal to 2, and N is a natural number;
the read-write terminal sends wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band;
the read-write terminal establishes communication connection with the N vehicle-mounted units in sequence through a 5.8GHz frequency band according to the physical address list, and after establishing communication connection with the vehicle-mounted unit corresponding to the ith physical address of the physical address list each time, transmits ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, wherein the ith data comprises the ith operation data and the ith physical address, and the ith operation data is obtained by the read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; under the condition that i is not equal to 1, the interval duration between sending ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and sending the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of processing the operation data by the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list, wherein i is more than or equal to 1 and is less than or equal to N;
after the read-write terminal sends the Nth data to the Nth vehicle-mounted unit, j confirmation data are sequentially sent to the vehicle-mounted unit corresponding to the j physical address of the physical address list through a 5.8GHz frequency band according to the physical address list, wherein the j confirmation data comprise a confirmation instruction and the j physical address, and j is larger than or equal to 1 and smaller than or equal to N.
Furthermore, the method further comprises: and the read-write terminal sends a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz frequency band under the condition of receiving a jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address, wherein the closing instruction is used for indicating to close the channel of the 5.8GHz frequency band.
Furthermore, the method further comprises: and the read-write terminal sends jth data to the vehicle-mounted unit corresponding to the jth physical address under the condition that the jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address is not received, wherein the jth data comprises the operation data and the jth physical address.
In addition, the acquiring, by the read-write terminal, the physical addresses of the N vehicle-mounted units in a preset manner includes: and the reading and writing terminal scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
In another aspect, the present invention provides a read/write terminal, where the read/write terminal communicates with N vehicle-mounted units, and channels of 5.8GHz bands of the N vehicle-mounted units are in an open state, and the read/write terminal includes:
the acquisition module is used for acquiring physical addresses of the N vehicle-mounted units in a preset mode and generating a physical address list, wherein the preset mode does not include a 5.8GHz frequency band, the physical address list includes the physical addresses of the N vehicle-mounted units, N is more than or equal to 2, and N is a natural number;
the communication module is used for sending wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band;
the communication module is further configured to establish communication connection with the N vehicle-mounted units in sequence through a 5.8GHz frequency band according to the physical address list, and after establishing communication connection with a vehicle-mounted unit corresponding to an ith physical address of the physical address list each time, send ith data to a vehicle-mounted unit corresponding to the ith physical address of the physical address list, where the ith data includes the ith operation data and the ith physical address, and the ith operation data is obtained by the read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; under the condition that i is not equal to 1, the interval duration between sending ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and sending the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of processing the operation data by the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list, wherein i is more than or equal to 1 and is less than or equal to N;
the communication module is further configured to sequentially send jth confirmation data to the vehicle-mounted units corresponding to the jth physical address of the physical address list through a 5.8GHz frequency band according to the physical address list after the nth data is sent to the nth vehicle-mounted unit, where the jth confirmation data includes a confirmation instruction and the jth physical address, and j is greater than or equal to 1 and less than or equal to N.
In addition, the communication module is further configured to send a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz band when a jth acknowledgement response sent by the vehicle-mounted unit corresponding to the jth physical address is received, where the closing instruction is used to instruct to close the channel of the 5.8GHz band.
In addition, the communication module is further configured to send jth data to the on-board unit corresponding to the jth physical address when a jth acknowledgement response sent by the on-board unit corresponding to the jth physical address is not received, where the jth data includes the operation data and the jth physical address.
In addition, the acquiring module is configured to acquire the physical addresses of the N on-board units in a preset manner, and includes: the acquisition module scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
By adopting the technical scheme provided by the invention, the read-write terminal can acquire the MAC addresses of the N vehicle-mounted units at one time, sequentially send operation data corresponding to the vehicle-mounted units for management (such as issuing, system upgrading, inventory management and the like) to the N vehicle-mounted units, and sequentially send confirmation signals to the N vehicle-mounted units after all the operation data are sent to all the vehicle-mounted units. The read-write terminal of the embodiment executes operations on the N vehicle-mounted units in batch, and does not need to manage the vehicle-mounted units one by one, and the read-write terminal can finish the operation of sending data to other vehicle-mounted units by using the time for receiving and processing the operation data by one vehicle-mounted unit, so that the time for reading and writing the terminal is utilized to the maximum extent, the working efficiency of the read-write terminal is improved, and the workload required for batch management of the vehicle-mounted units is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a method for communication between a read-write terminal and N on-board units in embodiment 1;
fig. 2 is a schematic structural diagram of the read-write terminal in embodiment 1.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the prior art, a read-write terminal communicates with a vehicle-mounted unit at 5.8GHz, and the read-write terminal is a read-write terminal with a 5.8GHz communication function, and therefore is also called a 5.8GHz read-write terminal. When a 5.8GHz read-write terminal needs to manage a vehicle-mounted unit (such as first release, system upgrade, warehouse management, etc.), one-to-one communication is generally required. Taking the example that the 5.8GHz read-write terminal issues a vehicle-mounted unit for the first time, generally, the 5.8GHz read-write terminal sends a wake-up signal to the vehicle-mounted unit, and the vehicle-mounted unit feeds back a wake-up response to the 5.8GHz, wherein the wake-up response has an MAC address of the vehicle-mounted unit. And the 5.8GHz read-write terminal establishes communication connection according to the MAC address, sends issuing data and finally completes issuing process. However, in the present application, in order to improve the communication efficiency, the 5.8GHz read-write terminal needs to communicate with N on-board units at one time, and if a manner of acquiring the MAC address through 5.8GHz in the prior art is adopted, the on-board units need to transmit the wake-up signal and the response signal one by one, which may cause time waste; if the 5.8GHz read-write terminal adopts a mode of broadcasting and sending the awakening signals to the N vehicle-mounted units, the N vehicle-mounted units simultaneously receive the awakening signals and then simultaneously send awakening responses to the 5.8GHz read-write terminal, and at the moment, the awakening responses collide with each other because the 5.8GHz read-write terminal receives too many awakening responses at the same time, so that the 5.8GHz read-write terminal cannot obtain a part of awakening responses or even one awakening response cannot be received, and therefore, the MAC address cannot be obtained at all.
Example 1
In this embodiment, the read-write terminal is a read-write terminal with a 5.8GHz communication function, which is also called a 5.8GHz read-write terminal. And one 5.8GHz read-write terminal can perform data interaction with the N vehicle-mounted units in a time-sharing manner. And the channels of the 5.8GHz band of the N on-board units are in an on state, for example, the 5.8GHz band of the N on-board units is in an on state when shipped from a factory. Generally, the present embodiment is performed before the on-board units are mounted to the respective vehicles to facilitate uniform management. As shown in fig. 1, the method includes:
step S101, the read-write terminal acquires physical addresses of N vehicle-mounted units in a preset mode and generates a physical address list, wherein the preset mode does not include a 5.8GHz frequency band, the physical address list includes the physical addresses of the N vehicle-mounted units, N is larger than or equal to 2, and N is a natural number. Specifically, the 5.8GHz read-write terminal can be an RSU device installed beside a toll road, or a handheld RSU device, and the handheld RSU device can be used for mobile toll collection, or a device specially used for issuing and upgrading an OBU. In this step, before establishing a 5.8GHz band communication connection with the on-board units, the 5.8GHz read-write terminal first obtains the physical addresses (Media Access Control addresses, MACs) of the N on-board units at one time in other manners, and does not need to obtain the MAC addresses in the 5.8GHz band.
In an optional implementation manner of this embodiment, the 5.8GHz read-write terminal acquires the physical addresses of the N on-board units by, but not limited to, the following manners: (1) the 5.8GHz read-write terminal scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time, for example, the N vehicle-mounted units can be packaged into a box, the two-dimensional code is arranged on the box, the two-dimensional code comprises the MAC address of one box of vehicle-mounted units, the 5.8GHz read-write terminal has a code scanning and reading function, and the physical addresses of the N vehicle-mounted units are acquired at one time by scanning the two-dimensional code on the box; (2) the 5.8GHz read-write terminal acquires the physical addresses of the N vehicle-mounted units at one time in a lead-in mode, the 5.8GHz read-write terminal is provided with a wired and wireless data communication interface, and the lead-in MAC addresses of the N vehicle-mounted units are received at one time through the wired and wireless communication interface.
And step S102, the read-write terminal sends wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band. Specifically, the 5.8GHz read-write terminal broadcasts and sends a wake-up signal to the N vehicle-mounted units, after the N vehicle-mounted units receive the wake-up signal at the same time, the N vehicle-mounted units will send a wake-up response to the 5.8GHz read-write terminal at the same time, and at this time, the 5.8GHz read-write terminal does not perform any processing on the received wake-up response, and directly executes step S103.
Step S103, the read-write terminal establishes communication connection with N vehicle-mounted units in sequence through a 5.8GHz frequency band according to the physical address list, and after communication connection is established with the vehicle-mounted unit corresponding to the ith physical address of the physical address list each time, ith data is sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, wherein the ith data comprises ith operation data and the ith physical address, and the ith operation data is obtained by the 5.8GHz read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; and under the condition that i is not equal to 1, the interval duration between the sending of the ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and the sending of the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of the processing of the operation data by the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list, wherein i is more than or equal to 1 and is less than or equal to N. In step S102, it is known that the 5.8GHz read/write terminal does not process the wake-up response. Therefore, after the 5.8GHz read-write terminal finishes sending the broadcast signals, the communication connection is sequentially established with the N vehicle-mounted units directly according to the previously acquired physical address list, and the subsequent data sending operation of the vehicle-mounted unit is executed after the communication connection is established with one vehicle-mounted unit. Specifically, each time the 5.8GHz read-write terminal establishes communication connection according to the vehicle-mounted unit corresponding to the MAC address in the physical address list, then a data packet containing operation data and the corresponding MAC address is sent to the vehicle-mounted unit, communication connection is immediately established with the vehicle-mounted unit corresponding to the next MAC address in the physical address list, subsequent data sending is also completed, and the like, until all the vehicle-mounted units corresponding to all the MAC addresses in the physical address list complete communication connection establishment and data sending.
In step S103, the time length for the 5.8GHz read-write terminal to send corresponding data to a certain vehicle-mounted unit is far shorter than the time length required for the vehicle-mounted unit to receive and process the data, and the time length of the interval between the 5.8GHz read-write terminal to send corresponding data to two vehicle-mounted units is also far shorter than the time length required for the vehicle-mounted units to receive and process the data. For example, it takes 1s for the 5.8GHz read-write terminal to transmit corresponding data to a certain vehicle-mounted unit, and after the 5.8GHz read-write terminal transmits corresponding data to one vehicle-mounted unit, it can transmit corresponding data to the next vehicle-mounted unit only at an interval of 1s, and it takes 60s for one vehicle-mounted unit to receive and process corresponding data. If the 5.8GHz read-write terminal does not execute other operations after sending corresponding data to one vehicle-mounted unit but waits for the response of the vehicle-mounted unit, 62s of time is consumed for issuing a single vehicle-mounted unit, so that the service time of the 5.8GHz read-write terminal is greatly wasted, and the communication efficiency is reduced. In this embodiment, the 5.8GHz read-write terminal sequentially sends all data to all N vehicle-mounted units without waiting for the response of the vehicle-mounted units, so that the working efficiency of the 5.8GHz read-write terminal can be improved.
In addition, the number of the vehicle-mounted units issued at one time by the 5.8GHz read-write terminal can be arranged according to the different time consumption proportions, namely, a reasonable number of N can be determined. Taking the time consumed in the above example as an example, N may be set to 60, that is, the 5.8GHz read-write terminal issues 60 vehicle-mounted units at a time, and when the first vehicle-mounted unit receives and processes the corresponding data, the 5.8GHz read-write terminal just completes the operation of sending the corresponding data to the 60 vehicle-mounted units, so that the time of the 5.8GHz read-write terminal is utilized to the maximum extent, and the communication efficiency is improved.
In step S103, according to different management behaviors to be executed by the 5.8GHz read-write terminal on the vehicle-mounted unit, the types of the operation data are different, and after receiving the operation data, the vehicle-mounted unit executes corresponding data processing or data writing operation according to the difference of the operation data. Management behaviors to be executed on the vehicle-mounted unit by the 5.8GHz read-write terminal include but are not limited to first release, system upgrading and warehouse management. For example, when the management action is an issuing operation, the issuing data may include a key data packet corresponding to the on-board unit to be issued, and the key data may include key information such as an authentication key, a master key, and a maintenance key, in which case, the operation data sent to each on-board unit may be different; when the management action is to upgrade the system operation, the operation data may include a system data packet of the system to be upgraded, in which case the operation data sent to each on-board unit may be the same.
In an optional implementation manner of this embodiment, the time for the 5.8GHz read-write terminal to obtain the operation instruction is not limited in step S103, and any step before the 5.8GHz read-write terminal obtains the operation data according to the operation instruction may be completed. The 5.8GHz read-write terminal can acquire an operation instruction once before acquiring operation data every time, and can also repeatedly acquire corresponding operation data according to the operation instruction once. The 5.8GHz read-write terminal can receive an instruction sent from the outside or detect some key inputs to obtain an operation instruction, for example, the 5.8GHz read-write terminal receives an instruction of other equipment and starts a management operation on the vehicle-mounted unit, or the 5.8GHz read-write terminal is provided with a key, and a user starts the management operation on the vehicle-mounted unit through the key.
It should be noted that, in step S103, after the 5.8GHz read-write terminal establishes a communication connection with a certain on-board unit and transmits a data packet containing operation data and a corresponding MAC address, the connection with the on-board unit is not interrupted. Therefore, in step S103, the 5.8GHz read-write terminal may maintain the state of communication connection with a maximum of N on-board units, so that subsequent operations do not need to establish connection again.
And step S104, after the read-write terminal sends the Nth data to the Nth vehicle-mounted unit, sequentially sending jth confirmation data to the vehicle-mounted unit corresponding to the jth physical address of the physical address list through a 5.8GHz frequency band according to the physical address list, wherein the jth confirmation data comprise a confirmation instruction and the jth physical address, and j is greater than or equal to 1 and less than or equal to N. Specifically, after the 5.8GHz read-write terminal sends all the corresponding data to all the N vehicle-mounted units, it needs to send confirmation data to all the N vehicle-mounted units in sequence according to the physical address list to check whether the vehicle-mounted units successfully receive and process the corresponding data, so as to ensure the reliability of data transmission.
In addition, in order to leave enough processing time for the on-board units, after the step S103 is executed to transmit the corresponding data to all N on-board units, the operation of the step S104 may be started after a period of time, so as to prevent the on-board units from being unable to transmit the confirmation response to the 5.8GHz read-write terminal because of insufficient processing time. The interval time can be set according to actual conditions.
In the method for communication between the read-write terminal and the N vehicle-mounted units provided by this embodiment, the 5.8GHz read-write terminal acquires the MAC addresses of the N vehicle-mounted units at a time, sequentially sends operation data corresponding to the vehicle-mounted units to the N vehicle-mounted units for management (such as issuing, system upgrading, inventory management, and the like), and sequentially sends confirmation signals to the N vehicle-mounted units after all the operation data are sent to all the vehicle-mounted units. By the method, the N vehicle-mounted units are operated in batches without performing individual management operation on the vehicle-mounted units, and the 5.8GHz read-write terminal can finish the operation of sending data to other vehicle-mounted units by using the time for receiving and processing the operation data by one vehicle-mounted unit, so that the time for the 5.8GHz read-write terminal is utilized to the maximum extent, the working efficiency of the 5.8GHz read-write terminal is improved, and the workload required for batch management of the vehicle-mounted units is greatly reduced.
In an alternative embodiment of the present invention, the method further comprises: step S105A, the read-write terminal sends a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz band under the condition of receiving the jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address, and the closing instruction is used for indicating to close the channel of the 5.8GHz band. Specifically, after the 5.8GHz read-write terminal sends a confirmation data to a certain vehicle-mounted unit, if the vehicle-mounted unit has successfully executed corresponding data processing and data writing operation according to the operation data, a confirmation response is sent to the 5.8GHz read-write terminal immediately, and then the 5.8GHz read-write terminal considers that the vehicle-mounted unit has successfully completed the management action to be executed, and can send a closing instruction to allow the vehicle-mounted unit to close the channel of the 5.8GHz band, thereby saving electric energy.
In an optional implementation manner of this embodiment, the method further includes: step S105B, the read-write terminal sends jth data to the vehicle-mounted unit corresponding to the jth physical address under the condition that the jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address is not received, wherein the jth data comprises the operation data and the jth physical address. Specifically, when the 5.8GHz read-write terminal sends a confirmation data to a certain vehicle-mounted unit, but the vehicle-mounted unit may not receive the operation data at all, or receive an error in the operation data, or cannot complete a corresponding operation according to the operation data, at this time, the vehicle-mounted unit does not send a confirmation response to the 5.8GHz read-write terminal, or sends a response of reception failure or processing failure to the 5.8GHz read-write terminal. Under the condition, the 5.8GHz read-write terminal judges that retransmission is started, and retransmits corresponding operation data to the vehicle-mounted unit, so that a redundancy mechanism is added, and the vehicle-mounted unit can successfully receive the operation data and execute corresponding operation.
The embodiment further provides a read-write terminal, which is a read-write terminal with a 5.8GHz communication function and is also called a 5.8GHz read-write terminal. The 5.8GHz read-write terminal is communicated with the N vehicle-mounted units, and channels of 5.8GHz frequency bands of the N vehicle-mounted units are in an open state. The structure of the 5.8GHz read-write terminal is only briefly described here, and for the rest, the description of the method section is referred to. As shown in fig. 2, the 5.8GHz read-write terminal includes:
the acquiring module 201 is configured to acquire physical addresses of N vehicle-mounted units in a preset manner, and generate a physical address list, where the preset manner does not include a 5.8GHz frequency band, the physical address list includes physical addresses of the N vehicle-mounted units, N is greater than or equal to 2, and N is a natural number;
the communication module 202 is used for sending wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band;
the communication module 202 is further configured to sequentially establish communication connection with the N vehicle-mounted units through a 5.8GHz frequency band according to the physical address list, and after each communication connection is established with the vehicle-mounted unit corresponding to the ith physical address of the physical address list, send ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, where the ith data includes ith operation data and the ith physical address, and the ith operation data is obtained by the 5.8GHz read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; under the condition that i is not equal to 1, the interval duration between sending the ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and sending the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of processing operation data by the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list, wherein i is more than or equal to 1 and is less than or equal to N;
the communication module 202 is further configured to, after the nth data is sent to the nth vehicle-mounted unit, sequentially send jth confirmation data to the vehicle-mounted unit corresponding to the jth physical address of the physical address list through a 5.8GHz frequency band according to the physical address list, where the jth confirmation data includes a confirmation instruction and the jth physical address, and j is greater than or equal to 1 and less than or equal to N.
The 5.8GHz read-write terminal provided in this embodiment can acquire the MAC addresses of the N on-board units at one time, sequentially send and manage (such as issue, system upgrade, inventory management, and the like) the operation data corresponding to the on-board units to the N on-board units, and sequentially send confirmation signals to the N on-board units after all the operation data are sent to all the on-board units. The 5.8GHz read-write terminal of the embodiment executes operations on N vehicle-mounted units in batches without carrying out individual management operations on the vehicle-mounted units, and the 5.8GHz read-write terminal can complete the operation of sending data to other vehicle-mounted units by using the time for receiving and processing the operation data by one vehicle-mounted unit, so that the time for the 5.8GHz read-write terminal is utilized to the maximum extent, the working efficiency of the 5.8GHz read-write terminal is improved, and the workload required for batch management of the vehicle-mounted units is greatly reduced.
In an optional implementation manner of this embodiment, the communication module 202 is further configured to, when a jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address is received, send a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz band, where the closing instruction is used to instruct to close the channel of the 5.8GHz band.
In an optional implementation manner of this embodiment, the communication module 202 is further configured to send jth data to the in-vehicle unit corresponding to the jth physical address under the condition that the jth confirmation response sent by the in-vehicle unit corresponding to the jth physical address is not received, where the jth data includes the operation data and the jth physical address.
In an optional implementation manner of this embodiment, the acquiring module acquires the physical addresses of the N onboard units by: the acquisition module scans the two-dimensional codes to acquire the physical addresses of the N vehicle-mounted units at one time.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The method for communication between the read-write terminal and the N vehicle-mounted units is characterized in that channels of 5.8GHz frequency bands of the N vehicle-mounted units are in an open state, and the method comprises the following steps:
the read-write terminal acquires physical addresses of N vehicle-mounted units in a preset mode and generates a physical address list, wherein the preset mode does not include a 5.8GHz frequency band, the physical address list includes the physical addresses of the N vehicle-mounted units, N is more than or equal to 2, and N is a natural number;
the read-write terminal sends awakening signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band;
the read-write terminal establishes communication connection with the N vehicle-mounted units in sequence through a 5.8GHz frequency band according to the physical address list, and after communication connection is established with the vehicle-mounted unit corresponding to the ith physical address of the physical address list each time, ith data is sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, wherein the ith data comprises ith operation data and the ith physical address, and the ith operation data is obtained by the read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; under the condition that i is not equal to 1, the interval duration between sending ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and sending the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of processing the operation data by the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list, wherein i is more than or equal to 1 and is less than or equal to N;
after the read-write terminal sends the Nth data to the Nth vehicle-mounted unit, j confirmation data are sequentially sent to the vehicle-mounted unit corresponding to the j physical address of the physical address list through a 5.8GHz frequency band according to the physical address list, wherein the j confirmation data comprise a confirmation instruction and the j physical address, and j is larger than or equal to 1 and smaller than or equal to N.
2. The method of claim 1, further comprising:
and the read-write terminal sends a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz frequency band under the condition of receiving a jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address, wherein the closing instruction is used for indicating to close the channel of the 5.8GHz frequency band.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
and the read-write terminal sends jth data to the vehicle-mounted unit corresponding to the jth physical address under the condition that the jth confirmation response sent by the vehicle-mounted unit corresponding to the jth physical address is not received, wherein the jth data comprises the operation data and the jth physical address.
4. The method according to claim 1 or 2, wherein the acquiring, by the read-write terminal, the physical addresses of the N vehicle-mounted units in a preset manner includes:
and the reading and writing terminal scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
5. The method according to claim 3, wherein the acquiring, by the read-write terminal, the physical addresses of the N vehicle-mounted units in a preset manner comprises:
and the reading and writing terminal scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
6. A read-write terminal is characterized in that the read-write terminal is communicated with N vehicle-mounted units, channels of 5.8GHz frequency bands of the N vehicle-mounted units are in an open state, and the read-write terminal comprises:
the acquisition module is used for acquiring physical addresses of the N vehicle-mounted units in a preset mode and generating a physical address list, wherein the preset mode does not include a 5.8GHz frequency band, the physical address list includes the physical addresses of the N vehicle-mounted units, N is more than or equal to 2, and N is a natural number;
the communication module is used for sending wake-up signals to the N vehicle-mounted units in a broadcast mode through a 5.8GHz frequency band;
the communication module is further configured to establish communication connection with the N vehicle-mounted units in sequence through a 5.8GHz frequency band according to the physical address list, and after establishing communication connection with a vehicle-mounted unit corresponding to an ith physical address of the physical address list each time, send ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list, where the ith data includes ith operation data and the ith physical address, and the ith operation data is obtained by the read-write terminal according to the obtained operation instruction; the transmission duration of the ith data sent to the vehicle-mounted unit corresponding to the ith physical address of the physical address list is shorter than the duration of the vehicle-mounted unit corresponding to the ith physical address of the physical address list for processing the operation data; when i is not equal to 1, the interval duration between the sending of the ith data to the vehicle-mounted unit corresponding to the ith physical address of the physical address list and the sending of the i-1 th data to the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list is less than the duration of the vehicle-mounted unit corresponding to the i-1 th physical address of the physical address list for processing the operation data, wherein i is more than or equal to 1 and less than or equal to N;
the communication module is further configured to sequentially send jth confirmation data to the vehicle-mounted units corresponding to the jth physical address of the physical address list through a 5.8GHz frequency band according to the physical address list after the nth data is sent to the nth vehicle-mounted unit, where the jth confirmation data includes a confirmation instruction and the jth physical address, and j is greater than or equal to 1 and less than or equal to N.
7. Read-write terminal according to claim 6,
the communication module is further configured to send a closing instruction to the vehicle-mounted unit corresponding to the jth physical address through the 5.8GHz band when the jth acknowledgement response sent by the vehicle-mounted unit corresponding to the jth physical address is received, where the closing instruction is used to instruct to close the channel of the 5.8GHz band.
8. Read-write terminal according to claim 6 or 7,
the communication module is further configured to send jth data to the vehicle-mounted unit corresponding to the jth physical address under the condition that a jth acknowledgement response sent by the vehicle-mounted unit corresponding to the jth physical address is not received, where the jth data includes the operation data and the jth physical address.
9. The read-write terminal according to claim 6 or 7, wherein the obtaining module is configured to obtain the physical addresses of the N vehicle-mounted units in a preset manner, and includes:
the acquisition module scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
10. The read-write terminal according to claim 8, wherein the acquiring module is configured to acquire the physical addresses of the N on-board units in a preset manner, and includes:
the acquisition module scans the two-dimensional code to acquire the physical addresses of the N vehicle-mounted units at one time.
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| CN201910848374.1A CN110809250B (en) | 2019-09-09 | 2019-09-09 | Method for communication between read-write terminal and N vehicle-mounted units and read-write terminal |
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| JP2008293414A (en) * | 2007-05-28 | 2008-12-04 | Toshiba Corp | Electronic equipment and method for searching connection device |
| CN101855861A (en) * | 2007-11-16 | 2010-10-06 | 富士通天株式会社 | Authentication method, authentication system, vehicle-mounted device, and authentication device |
| JP5261614B2 (en) * | 2010-05-24 | 2013-08-14 | ルネサスエレクトロニクス株式会社 | Communication system, in-vehicle terminal, roadside device |
| JP5682610B2 (en) * | 2012-11-07 | 2015-03-11 | トヨタ自動車株式会社 | In-vehicle communication device, in-vehicle communication system, and communication method |
| CN103237293A (en) * | 2012-11-19 | 2013-08-07 | 北京新岸线移动多媒体技术有限公司 | Method and device for sending and receiving messages |
| JP6340891B2 (en) * | 2014-04-22 | 2018-06-13 | 株式会社デンソー | In-vehicle communication terminal and mobile communication system |
| CN106529940A (en) * | 2016-10-25 | 2017-03-22 | 天地融科技股份有限公司 | Operation execution method of smart card, smart card read-write system and smart card |
| CN107864207B (en) * | 2017-11-14 | 2020-12-08 | 上海赫千电子科技有限公司 | An ECU software upgrade method based on in-vehicle Ethernet |
| CN108833607B (en) * | 2018-06-12 | 2022-03-11 | 腾讯科技（深圳）有限公司 | Physical address acquisition method, device and readable medium |
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