CN113556782A - Data transmission unit and data protection method - Google Patents
Data transmission unit and data protection method Download PDFInfo
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- CN113556782A CN113556782A CN202010250323.1A CN202010250323A CN113556782A CN 113556782 A CN113556782 A CN 113556782A CN 202010250323 A CN202010250323 A CN 202010250323A CN 113556782 A CN113556782 A CN 113556782A
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- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
- H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
Abstract
The invention provides a data transmission unit and a data protection method, belonging to the technical field of communication, wherein the data transmission unit comprises: the protection module is used for protecting the data transmission of the wireless communication module; the protection module includes: the wireless communication system comprises at least one sensor and a second wireless communication module connected with the at least one sensor; the second wireless communication module judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor; the first wireless communication module comprises a control module and a first wireless communication module, the control module is connected with the second wireless communication module, the second wireless communication module sends first information to the control module when judging that the data transmission unit is detached and/or disassembled, and the control module executes corresponding data protection operation according to the first information. The invention can prevent the data in the data transmission unit from being illegally stolen.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission unit and a data protection method.
Background
With the development of communication technology and internet of things technology, data acquisition and uploading become typical applications in the internet of things era. The Data Transfer Unit (DTU) is a common device and apparatus for Data transmission, and performs Data acquisition and aggregation on multiple 485 or 232 signals, performs protocol analysis and analysis, and uploads the Data to the cloud platform through a wireless network (e.g., a 4G network, a 5G network, etc.).
The current DTU laying scene is complex, one part is arranged indoors, the other part is arranged outdoors, and the holding pole and the wall-climbing scene exist. The general scene is mostly unmanned on duty long-time work, and DTU is many by the fix with screw, dismantles through using specialized tool very easily. Once the data is taken out and disassembled, the signal bus is easy to monitor, the data reported by each signal node is exposed to lawless persons, and the collected data is illegally monitored and analyzed through equipment such as an oscilloscope and a protocol analyzer, so that the safety of the internet of things is greatly threatened.
Disclosure of Invention
In view of this, the present invention provides a data transmission unit and a data protection method, which are used to solve the problem that data in the current data transmission unit is easily stolen illegally.
To solve the above technical problem, in a first aspect, the present invention provides a data transmission unit, including: the protection module is used for protecting the data transmission of the wireless communication module;
the protection module includes: the wireless communication system comprises at least one sensor and a second wireless communication module connected with the at least one sensor; the second wireless communication module judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor;
the first wireless communication module comprises a control module and a first wireless communication module, the control module is connected with the second wireless communication module, the second wireless communication module sends first information to the control module when judging that the data transmission unit is detached and/or disassembled, and the control module executes corresponding data protection operation according to the first information.
Optionally, the at least one sensor comprises at least one of an acceleration sensor, a light sensor and a vibration sensor;
the acceleration sensor is used for detecting at least one of acceleration and displacement and outputting a first signal;
the light sensor is used for detecting illumination and outputting a second signal;
the vibration sensor is used for detecting vibration and outputting a third signal;
the second wireless communication module is connected with the acceleration sensor and receives the first signal; and/or, connect with said photosensor, receive the said second signal; and/or, the vibration sensor is connected with the receiver and receives the third signal;
the second wireless communication module judges whether the data transmission unit is detached or not according to the first signal and/or the third signal under the condition of receiving the first signal and/or the third signal; and under the condition of receiving the second signal, judging whether the data transmission unit is disassembled or not according to the second signal.
Optionally, the data transmission unit further includes: an energy storage module;
the energy storage module is connected with the protection module and supplies power to the protection module after the data transmission unit is disconnected from an external power supply; and/or the presence of a gas in the gas,
the energy storage module is connected with the first wireless communication module and supplies power to the first wireless communication module after the data transmission unit is disconnected with an external power supply.
Optionally, the protection module further includes: the satellite positioning module is used for detecting the position information;
the second wireless communication module is connected with the satellite positioning module and sends the position information detected by the satellite positioning module to a server.
Optionally, the second wireless communication module is a narrowband internet of things module.
In a second aspect, the present invention further provides a data protection method applied to any one of the data transmission units, including:
the second wireless communication module judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor;
the second wireless communication module sends first information to the control module under the condition that the data transmission unit is judged to be disassembled and/or disassembled;
and the control module executes corresponding data protection operation according to the first information.
Optionally, the second wireless communication module sends the first information to the control module when determining that the data transmission unit is detached and/or disassembled, where the first information includes:
the second wireless communication module sends second information to a server under the condition that the data transmission unit is judged to be disassembled and/or disassembled, wherein the second information comprises information used for authenticating the disassembly and/or information used for indicating the server to authenticate the disassembly and/or the disassembly;
the second wireless communication module receives third information sent by the server according to the second information, wherein the third information is used for indicating the control module to execute data protection operation;
and the second wireless communication module sends first information to the control module according to the third information.
Optionally, the data protection operation includes at least one of:
the data bus is locked;
deleting the stored data;
reporting data;
shutting down the system;
powering off the system;
the communication data is cut off.
Optionally, the first information includes a first information unit and a second information unit;
the second wireless communication module sends first information to the control module when judging that the data transmission unit is disassembled and/or disassembled, and the first information comprises:
the second wireless communication module sends the first information unit to the control module under the condition that the data transmission unit is judged to be detached;
the second wireless communication module sends the second information unit to the control module under the condition that the data transmission unit is judged to be disassembled;
the control module executes corresponding data protection operation according to the first information, and the control module comprises:
the control module executes a first data protection operation in the data protection operations according to the first information unit under the condition that the first information unit is received;
the control module executes a second data protection operation in the data protection operations according to the second information unit when receiving the second information unit;
wherein the first data protection operation is different from the second data protection operation.
Optionally, when the data protection operation includes a data bus lock, after the control module executes a corresponding data protection operation according to the first information, the method further includes:
receiving unlocking command information sent by a server;
and unlocking the data bus according to the unlocking command information.
The technical scheme of the invention has the following beneficial effects:
in the embodiment of the present invention, the second wireless communication module in the protection module may determine whether the data transmission unit is detached and/or disassembled according to the signal output by the at least one sensor, and send the first information to the control module when it is determined that the data transmission unit is detached and/or disassembled, and the control module performs a corresponding data protection operation according to the first information, so as to prevent the data in the data transmission unit from being illegally stolen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a data transmission unit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hardware structure of another data transmission unit according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a data protection method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating another data protection method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a Data Transmission Unit (DTU) according to an embodiment of the present invention, where the data transmission unit 10 includes: the first wireless communication module 2 and the protection module 1 are used for data transmission;
the protection module 1 comprises: at least one sensor 12 and a second wireless communication module 11 connected with the at least one sensor 12; the second wireless communication module 11, which determines whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor 12;
the first wireless communication module 2 comprises a control module 21 and a first wireless communication module 22, the control module 21 is connected with the second wireless communication module 11, the second wireless communication module 11 sends first information to the control module 21 when judging that the data transmission unit is disassembled and/or disassembled, and the control module 21 executes corresponding data protection operation according to the first information.
The data transmission unit is detached from the current installation fixing position, for example, from the installation rod or the installation wall, or from the original fixing frame, but the housing of the data transmission unit is not opened. Disassembly means that the data transmission unit itself is disassembled, for example the housing is disassembled.
The first wireless communication module 22 may be a fourth generation mobile communication (4G) module or a fifth generation mobile communication (5G) module, and the control module 21 may be a Central Processing Unit (CPU) or a Micro Controller Unit (MCU). The first wireless communication module 2 including the first wireless communication module 22 and the control module 21 is used to implement the basic functions of the data transmission unit.
In the embodiment of the present invention, the second wireless communication module 11 in the protection module 1 can determine whether the data transmission unit is detached and/or disassembled according to the signal output by the at least one sensor 12, and send the first information to the control module 21 when determining that the data transmission unit is detached and/or disassembled, and the control module 21 performs the corresponding data protection operation according to the first information, so as to prevent the data in the data transmission unit from being illegally stolen.
The above-described data transmission unit is exemplified below.
Optionally, when the second wireless communication module 11 determines that the data transmission unit is detached and/or disassembled, the second wireless communication module may send first information to the control module 21 through a Universal Asynchronous Receiver/Transmitter (UART) serial port, and the control module 21 is informed of data protection operations such as data bus locking, data saving, and data uploading. The UART generally refers to a serial signal in the board, which is 3.3V or 1.8V, and is used for data interaction between the second wireless communication module (NB module) 11 and the control module (CPU/MCU) 21. The interactive data includes that the second wireless communication module 11 informs the control module 21 of information obtained by a sensor sensing an abnormality currently, and a command issued by the server to request the control module 21 to stop receiving and sending data and indirectly control the terminal device to stop sending data, controls the control module 21 to enter a sleep state, or controls the control module 21 to erase FLASH memory data and other commands.
Optionally, the at least one sensor 12 comprises at least one of an acceleration sensor, a light sensor and a vibration sensor;
the acceleration sensor is used for detecting at least one of acceleration and displacement and outputting a first signal;
the light sensor is used for detecting illumination and outputting a second signal;
the vibration sensor is used for detecting vibration and outputting a third signal;
the second wireless communication module 11 is connected to the acceleration sensor, and receives the first signal; and/or, connect with said photosensor, receive the said second signal; and/or, the vibration sensor is connected with the receiver and receives the third signal;
the second wireless communication module 11, when receiving the first signal and/or the third signal, determines whether the data transmission unit is detached according to the first signal and/or the third signal; and under the condition of receiving the second signal, judging whether the data transmission unit is disassembled or not according to the second signal.
That is, the at least one sensor 12 is used to sense abnormalities such as vibration, acceleration, displacement, and light. The data transmission unit can be considered to be detached from an installation place after the acceleration sensor senses acceleration, displacement and/or the vibration sensor senses vibration, and the data transmission unit can be considered to be detached after the light sensor senses illumination.
The acceleration sensor may specifically be a three-axis acceleration sensor, and the optical sensor may also be referred to as a light-sensitive sensor.
Specifically, when the acceleration sensor detects rotation and displacement of the physical space, the data transmission unit is considered to be detached and taken away. The light sensor may be mounted within the housing of the data transmission unit, normally without or with only a small amount of illumination, but once the housing of the data transmission unit is disassembled (e.g., the upper cover is opened), more ambient illumination is received.
In the embodiment of the present invention, the data transmission unit is disassembled and can be sensed respectively, so that the second wireless communication module 11 performs different data protection operations.
In other alternative embodiments, the at least one sensor 12 may further include another sensor, and the signal output by the other sensor may be used alone to determine whether the data transmission unit is detached and/or disassembled, or may be used in combination with the signal output by the acceleration sensor and/or the optical sensor to determine whether the data transmission unit is detached and/or disassembled.
Optionally, referring to fig. 2, the data transmission unit further includes: an energy storage module 3;
the energy storage module 3 is connected with the protection module 1, and supplies power to the protection module 1 after the data transmission unit is disconnected from an external power supply; and/or the presence of a gas in the gas,
the energy storage module 3 is connected with the first wireless communication module 2, and supplies power to the first wireless communication module 2 after the data transmission unit is disconnected from an external power supply.
In the embodiment of the present invention, the data transmission unit further includes an energy storage module 3, and the energy storage module 3 may be further connected to the protection module 1, so that the protection module 1 can work independently, and the monitoring of the state (normal state, detached state, disassembled state) of the data transmission unit is realized through the second wireless communication module 11 and the sensor 12.
That is, the energy storage module 3, which may be a battery, is built in the data transmission unit.
In a specific embodiment, the energy storage module 3 is connected not only to the protection module 1, but also to the first wireless communication module 2, so that data protection can be achieved even after the data transmission unit is disconnected from an external power supply.
Further optionally, in order to reduce power consumption, after the first wireless communication module 2 performs the corresponding data protection operation, the connection with the energy storage module 3 may be disconnected.
Optionally, the protection module 1 further includes: the satellite positioning module is used for detecting the position information;
the second wireless communication module 11 is connected to the satellite positioning module, and sends the position information detected by the satellite positioning module to a server.
The satellite Positioning module may be a Global Positioning System (GPS) module. The server may specifically be a cloud system.
In addition, the position information detected by the satellite positioning module can be used to judge or assist in judging whether the data transmission unit is detached, for example, if the change of the geographic position is detected, the data transmission unit is detached from the installation position.
In the embodiment of the present invention, the energy storage module 3 is connected to the protection module 1, and after the data transmission unit is disconnected from an external power supply, that is, after the data transmission unit is powered off, the protection module 1 is powered on, so that the protection module 1 in the data transmission unit can still report the position to assist in retrieving the data transmission unit.
In the embodiment of the invention, after the data transmission unit is detached, the data transmission unit can be retrieved through a GPS positioning function.
Of course, in order to reduce power consumption, the position information may not be continuously transmitted but may be transmitted at intervals (intermittently), for example, at a preset cycle.
In addition, in order to ensure that the energy storage module 3 can have sufficient electric energy to realize data protection and equipment retrieval after the external power supply is powered off, the energy storage module 3 supplies power and is combined with the external power supply, the data transmission unit is powered by the external power supply when being powered on, and the energy storage module 3 supplies power only after the external power supply is switched off.
Optionally, the second wireless communication module 11 is a Narrow-Band Internet of Things (NB-IoT) module, which may be referred to as an NB module for short. The second wireless communication module 11 performs information interaction with a server through an NB network.
Optionally, the second wireless communication module 11 adopts a System on Chip (SoC ), supports an OpenCPU working mode, and has sensing and control capabilities of a general purpose input/output (GPIO) port. The second wireless communication module 11 can work independently and is not affected by the power failure of the control board and the system of the first wireless communication module 2.
That is to say, the data transmission unit is internally provided with an NB module which can support the independent operation of the OpenCPU based on an SoC system on chip. Specifically, the NB module supports system on-chip operation by a FreeRTOS (which is a mini real-time operating system kernel) and the like based on an SoC scheme, and directly performs operations of an input/output (IO) port and a Universal Asynchronous Receiver/Transmitter (UART) and the like, and can independently operate without an MCU.
In addition, referring to fig. 2, the data transmission unit further includes at least one of the following components: a power supply circuit 4, a bus processing circuit 5 and a memory module 6. The first wireless communication module 22 (e.g. 4G module), the control module 21 (e.g. CPU or MCU) and the bus processing circuit cooperate to complete the function of a general data transmission unit. The storage module 6 includes a Dynamic Random Access Memory (DRAM) and a FLASH Memory (FLASH), the DRAM includes DDR3, DDR4, and the like for system program operation, and the FLASH Memory includes an Embedded multimedia Card (eMMC), NANDFLASH, and the like for system firmware and data storage.
Referring to fig. 3, fig. 3 is a schematic flow chart of a data protection method according to an embodiment of the present invention, where the method is applied to any one of the data transmission units, and includes the following steps:
step 301: the second wireless communication module 11 judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor 12;
step 302: the second wireless communication module 11 sends first information to the control module 21 when determining that the data transmission unit is disassembled and/or disassembled;
step 303: the control module 21 executes a corresponding data protection operation according to the first information.
In the embodiment of the present invention, the second wireless communication module 11 can determine whether the data transmission unit is detached and/or disassembled according to the signal output by the at least one sensor 12, and send the first information to the control module 21 when determining that the data transmission unit is detached and/or disassembled, and the control module 21 performs the corresponding data protection operation according to the first information, so as to prevent the data in the data transmission unit from being illegally stolen.
The above-described data protection method is exemplified below.
In an optional specific embodiment, when the second wireless communication module 11 determines that the data transmission unit is detached and/or disassembled, it sends first information to the control module 21, where the first information includes:
the second wireless communication module 11 sends second information to a server when determining that the data transmission unit is disassembled and/or disassembled, where the second information includes information for authenticating the disassembling and/or information for instructing the server to authenticate the disassembling and/or disassembling;
the second wireless communication module 11 receives third information sent by the server according to the second information, where the third information is used to instruct the control module 21 to perform a data protection operation;
the second wireless communication module 11 sends the first information to the control module 21 according to the third information.
The second information includes alarm information, that is, the second wireless communication module 11 reports the alarm information to the server when determining that the data transmission unit is detached and/or disassembled.
In the embodiment of the present invention, the server may perform authentication judgment on the disassembly and/or disassembly of the data transmission unit, and once the current disassembly and/or disassembly is identified as an illegal action, the server sends third information to the second wireless communication module 11, and the second wireless communication module 11 sends the first information to the control module 21 according to the third information, so that the control module 21 performs a corresponding data protection operation according to the first information.
Specifically, the third information may specifically be a lock and data saving command. The first information includes interrupt information.
In the embodiment of the invention, the energy storage module 3 is arranged in the data transmission unit, so that the steps can be still realized even after the external power supply is disconnected.
Of course, in some alternative embodiments, the second information may also include a signal output by the at least one sensor 12. The server may determine again whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor 12 sent by the second wireless communication module 11, so as to avoid the misjudgment of the second wireless communication module 11.
In another optional specific embodiment, when the second wireless communication module 11 determines that the data transmission unit is detached and/or disassembled, the second wireless communication module 11 may directly send first information to the control module 21, and the control module 21 may execute a corresponding data protection operation according to the first information directly sent by the second wireless communication module 11.
Further, before sending the first information to the control module 21, the method further includes:
the second wireless communication module 11 receives authentication information;
the second wireless communication module 11 judges whether the current disassembly and/or disassembly behavior of the data transmission unit is legal or not according to the authentication information;
the step of sending the first information to the control module 21 includes:
when the second wireless communication module 11 determines that the current disassembly and/or disassembly of the data transmission unit is illegal according to the authentication information, it sends first information to the control module 21.
That is, authentication information may be issued to the second wireless communication module 11 in advance, for example, before the data transmission unit is normally disassembled and assembled, the authentication information may be issued to the second wireless communication module 11 through an application program on a mobile phone or a server in advance, and then, if the second wireless communication module 11 senses that the data transmission unit is abnormal (specifically, the data transmission unit is disassembled and/or assembled according to a signal output by at least one sensor 12), and the current disassembling and/or assembling behavior is judged to be a legal behavior according to the authentication information issued in advance, only the status indication information that the data transmission unit is currently disassembled and/or assembled and/or the signal output by the at least one sensor 12 need to be reported to the server, and no alarm information is reported, and the CPU/MCU is not required to execute, for example, a bus lock, And carrying out data protection operations such as key data uploading and storing.
Optionally, the data protection operation includes at least one of:
the data bus is locked;
deleting the stored data;
reporting data, or called data uploading;
shutting down the system;
powering off the system;
the communication data is cut off.
The data bus locking operation can prohibit data transmission, and prevent bus data from being illegally stolen.
Of course, it should be understood by those skilled in the art that the data protection operation is not limited to the listed ones, and may also include other data security policies, which are not described in detail herein. Moreover, the combination of various data protection operations may be adjusted according to actual needs.
Optionally, the first information includes a first information unit and a second information unit;
the second wireless communication module 11 sends first information to the control module 21 when determining that the data transmission unit is disassembled and/or disassembled, including:
the second wireless communication module 11 sends the first information unit to the control module 21 when determining that the data transmission unit is detached;
the second wireless communication module 11 sends the second information unit to the control module 21 when determining that the data transmission unit is disassembled;
the control module 21 executes a corresponding data protection operation according to the first information, including:
the control module 21, in case of receiving the first information unit, performs a first data protection operation of the data protection operations according to the first information unit;
the control module 21, in case of receiving the second information unit, performs a second data protection operation of the data protection operations according to the second information unit;
wherein the first data protection operation is different from the second data protection operation.
For example, only when the second wireless communication module 11 determines that the data transmission unit is illegally disassembled, the control module 21 performs a data bus lock operation to prohibit data transmission, so as to prevent bus data from being illegally stolen.
Of course, when the first information (the first information element and the second information element) is the third information sent by the second wireless communication module 11 to the control module 21 according to the server, the second information sent by the second wireless communication module 11 to the server when determining that the data transmission unit is disassembled is different from the second information sent by the second wireless communication module 11 to the server when determining that the data transmission unit is disassembled. Correspondingly, the server issues different third information to the second wireless communication module 11 according to different second information.
In addition, the warning information sent by the second wireless communication module 11 to the server when it is determined that the data transmission unit is disassembled may be different from the warning information sent to the server when it is determined that the data transmission unit is disassembled.
For example, when the acceleration sensor senses (i.e., detects) that the position is moved, the vibration sensor senses that the data transmission unit is abnormally touched, and the NB module determines that the data transmission unit is detached. And the NB module reports the alarm information and the signals output by the sensor sensing the abnormity to the server through the NB network. Meanwhile, the NB module inquires the server whether the disassembly behavior is recorded in advance, if not, the disassembly behavior is considered as an illegal disassembly behavior, and the following treatment can be optionally carried out: the method comprises the steps that an INT interrupt pin is immediately reported to a CPU, after the CPU receives an interrupt request, the CPU communicates with an NB module through buses such as UART (a serial port, generally 3.3V or 1.8V) and I2C, and the NB module feeds back operations to be performed to the CPU through a data bus. The strategies received by the CPU include the following:
1. and stopping transmitting the data which is transmitted by the RS232/RS485 on the current DTU, sending an instruction to the subordinate terminal equipment through the bus to inform the subordinate terminal equipment of the abnormality, and stopping reporting the data.
2. And for the received data, the data which is not uploaded can be immediately written into the FLASH non-abnormal-loss memory device for storage, and the data is used for continuing to report after the state is recovered to be normal.
3. For longer data, there is a certain probability that the data on the bus is in a receive or transmit state:
1) if the data being transmitted to the terminal equipment by the CPU is interrupted in the midway, an end bit is transmitted in advance to inform that the terminal equipment stops due to abnormity.
2) For data being received, it is possible that only half of the data is received. For the RS232 bus, since the Transmission (TX) and Reception (RX) are full duplex, the DTU immediately sends an instruction to the terminal side to inform the terminal side to stop transmitting data, and to record the flag bit, the frame data is not successfully transmitted. Closing the data bus and stopping data receiving and transmitting; for the RS485 bus, because the bus is half-duplex, it can not send command to the terminal equipment immediately to request it stop sending, so it can choose the received data, the DTU side receives and stores it into FLASH, it records the flag bit, the frame data is not received completely, when it is started or returns to normal next time, the CPU in DTU looks at the flag bit to know that some data is not received completely last time, it can send command to the terminal equipment to request it to send the data again.
3) For data which is sent to the terminal equipment by the terminal equipment, a CPU in the DTU immediately inserts a stop bit or a flag bit of abnormal information into a data frame which is being sent, the terminal equipment recognizes that the received data stops in advance or the received data has the flag bit of the abnormal information, knows that the DTU side has the abnormality, and optionally stops reporting the data according to a preset configuration strategy and waits for the requirement of a starting instruction of the DTU.
After the work is finished, the CPU suspends the current system, stores the data into a FLASH, eMMC and other nonvolatile large-capacity memories, and enters a dormant state.
The NB module can selectively power off the CPU and the peripheral circuit, further reduces the power consumption of the whole machine, enters a psm ultra-low power consumption mode for intermittently reporting position information and the like for retrieving the equipment. And simultaneously, sensing whether the abnormal state of the disassembled equipment exists or not, and further processing.
When the NB module detects that the device (namely the data transmission unit) is disassembled (or is disassembled), the NB module tries to interact with the CPU, and if the CPU is in a sleep state, the NB module controls the power supply circuit to power down the CPU circuit. If the CPU does not finish the operations of data processing, bus data stop and the like under the condition of being disassembled, the NB module requires to execute the actions and then controls the CPU to enter the sleep mode or power off the peripheral circuit of the CPU. In addition, if the NB module is authenticated, the dismantling equipment is found to be illegal, data interaction can be carried out with the cloud server again, further indication is requested, the current equipment is informed that the illegal dismantling of the current equipment is further changed into illegal dismantling, the CPU can be controlled to be started intermittently, the CPU controls the FLASH to completely erase key data of the FLASH, and the FLASH enters a dormant or power-off state again.
Optionally, the data protection method further includes:
the second wireless communication module 11 sends the position information detected by the satellite positioning module to a server.
In the embodiment of the invention, after the data unit is disassembled or disassembled, the positioning information can still be sent to the server, so that the data unit can be recovered in an assisted manner.
Specifically, the second wireless communication module 11 may send the position information detected by the satellite positioning module to a server only when it is determined that the data transmission unit is detached. In other words, if it is determined that the data transmission unit is disassembled but not disassembled, the position information detected by the satellite positioning module is not transmitted to the server.
Optionally, when the data protection operation includes a data bus lock, after the control module 21 executes a corresponding data protection operation according to the first information, the method further includes:
receiving unlocking command information sent by a server;
and unlocking the data bus according to the unlocking command information.
In the embodiment of the invention, after the data transmission unit is retrieved, the bus lock of the data transmission unit can be released by a server issuing instruction, so that the data transmission unit can be recovered to work normally.
For example, referring to fig. 4, the data protection method includes:
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A data transmission unit, comprising: the protection module is used for protecting the data transmission of the wireless communication module;
the protection module includes: the wireless communication system comprises at least one sensor and a second wireless communication module connected with the at least one sensor; the second wireless communication module judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor;
the first wireless communication module comprises a control module and a first wireless communication module, the control module is connected with the second wireless communication module, the second wireless communication module sends first information to the control module when judging that the data transmission unit is detached and/or disassembled, and the control module executes corresponding data protection operation according to the first information.
2. The data transfer unit of claim 1, wherein the at least one sensor comprises at least one of an acceleration sensor, a light sensor, and a vibration sensor;
the acceleration sensor is used for detecting at least one of acceleration and displacement and outputting a first signal;
the light sensor is used for detecting illumination and outputting a second signal;
the vibration sensor is used for detecting vibration and outputting a third signal;
the second wireless communication module is connected with the acceleration sensor and receives the first signal; and/or, connect with said photosensor, receive the said second signal; and/or, the vibration sensor is connected with the receiver and receives the third signal;
the second wireless communication module judges whether the data transmission unit is detached or not according to the first signal and/or the third signal under the condition of receiving the first signal and/or the third signal; and under the condition of receiving the second signal, judging whether the data transmission unit is disassembled or not according to the second signal.
3. The data transmission unit of claim 1, further comprising: an energy storage module;
the energy storage module is connected with the protection module and supplies power to the protection module after the data transmission unit is disconnected from an external power supply; and/or the presence of a gas in the gas,
the energy storage module is connected with the first wireless communication module and supplies power to the first wireless communication module after the data transmission unit is disconnected with an external power supply.
4. A data transmission unit according to claim 1 or 3, characterized in that the protection module further comprises: the satellite positioning module is used for detecting the position information;
the second wireless communication module is connected with the satellite positioning module and sends the position information detected by the satellite positioning module to a server.
5. The data transmission unit of claim 1, wherein the second wireless communication module is a narrowband internet of things module.
6. A data protection method applied to the data transmission unit of any one of claims 1 to 5, comprising:
the second wireless communication module judges whether the data transmission unit is disassembled and/or disassembled according to the signal output by the at least one sensor;
the second wireless communication module sends first information to the control module under the condition that the data transmission unit is judged to be disassembled and/or disassembled;
and the control module executes corresponding data protection operation according to the first information.
7. The method according to claim 6, wherein the second wireless communication module sends first information to a control module in case that it is determined that the data transmission unit is disassembled and/or disassembled, the first information comprising:
the second wireless communication module sends second information to a server under the condition that the data transmission unit is judged to be disassembled and/or disassembled, wherein the second information comprises information used for authenticating the disassembly and/or information used for indicating the server to authenticate the disassembly and/or the disassembly;
the second wireless communication module receives third information sent by the server according to the second information, wherein the third information is used for indicating the control module to execute data protection operation;
and the second wireless communication module sends the first information to the control module according to the third information.
8. The method of claim 6, wherein the data protection operation comprises at least one of:
the data bus is locked;
deleting the stored data;
reporting data;
shutting down the system;
powering off the system;
the communication data is cut off.
9. The method according to any of claims 6-8, wherein the first information comprises a first information unit and a second information unit;
the second wireless communication module sends first information to the control module when judging that the data transmission unit is disassembled and/or disassembled, and the first information comprises:
the second wireless communication module sends the first information unit to the control module under the condition that the data transmission unit is judged to be detached;
the second wireless communication module sends the second information unit to the control module under the condition that the data transmission unit is judged to be disassembled;
the control module executes corresponding data protection operation according to the first information, and the control module comprises:
the control module executes a first data protection operation in the data protection operations according to the first information unit under the condition that the first information unit is received;
the control module executes a second data protection operation in the data protection operations according to the second information unit when receiving the second information unit;
wherein the first data protection operation is different from the second data protection operation.
10. The method of claim 8, wherein in the case that the data protection operation comprises a data bus lock, after the controlling module performs the corresponding data protection operation according to the first information, further comprising:
receiving unlocking command information sent by a server;
and unlocking the data bus according to the unlocking command information.
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