CN115665710A - Method for operating a device in a bluetooth based communication system - Google Patents
Method for operating a device in a bluetooth based communication system Download PDFInfo
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- CN115665710A CN115665710A CN202211311131.2A CN202211311131A CN115665710A CN 115665710 A CN115665710 A CN 115665710A CN 202211311131 A CN202211311131 A CN 202211311131A CN 115665710 A CN115665710 A CN 115665710A
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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
Abstract
The present invention relates to a method of operating a device in a bluetooth based communication system. A method of operation of a first device in a bluetooth based communication system comprises: establishing a bluetooth communication connection with a second device in a bluetooth-based communication system; acquiring data to be transmitted, and generating a Bluetooth communication data packet with a preset format for the data to be transmitted; transmitting the generated bluetooth communication data packet to the second device via the established bluetooth communication connection; the Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail; the packet header comprises a frame header, a frame sequence number and a frame length; the packet tail comprises CRC check bits and a frame tail; the data unit includes a command code, a command subcode, and data. The invention ensures the stability and the integrity of data transmission by formulating reasonable communication rules among the devices, and improves the safety and the stability in the Bluetooth transmission process.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method for operating a device in a bluetooth-based communication system.
Background
Bluetooth is a wireless transmission technology supporting short-distance communication, and can perform wireless information switching between related devices including mobile phones, tablet computers and the like. The standard for bluetooth is IEEE802.15, operating in the 2.4GHz band. The Bluetooth system consists of a bottom hardware module, a middle protocol layer and a high-level application layer. The existing Bluetooth technology depends on a safety mechanism of a Bluetooth protocol during interaction, the frequency of data transmission is not high, and although energy consumption is low in the process of data transmission, polling access in the waiting process is very energy consumption for corresponding connection requests. The design goal of bluetooth is to establish a baseless Local Area Network between devices for near field communication between multiple devices, similar to the peer-to-peer (ad hoc) mode of Wireless Local Area Network (WLAN). The existing bluetooth technology has limited transmission distance, incompatible protocols between different devices and unstable transmission process, and particularly, the risk of intercepting and cracking data exists in the process of bluetooth data transmission.
Therefore, there is a need for a method of operating a device in a bluetooth-based communication system that ensures stable and complete data transmission.
The above statements in the background are only intended to facilitate a thorough understanding of the present technical solutions (technical means used, technical problems solved and technical effects produced, etc.) and should not be taken as an acknowledgement or any form of suggestion that the messages constitute prior art already known to a person skilled in the art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an operation method of equipment in a communication system based on Bluetooth, which makes reasonable communication rules among the equipment to ensure the stability and the integrity of data transmission and improve the safety and the stability in the Bluetooth transmission process.
According to an embodiment of the present invention, there is provided an operating method of a first device in a bluetooth-based communication system, the operating method including: establishing a bluetooth communication connection with a second device in a bluetooth-based communication system; acquiring data to be transmitted, and generating a Bluetooth communication data packet with a preset format for the data to be transmitted; transmitting the generated bluetooth communication data packet to the second device via the established bluetooth communication connection; the Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail; the packet header comprises a frame header, a frame serial number and a frame length; the packet tail comprises CRC check bits and a frame tail; the data unit includes a command code, a command subcode, and data.
Preferably, the establishing of the bluetooth communication connection with the second device comprises: receiving a bluetooth communication connection request from a second device; the different Bluetooth protocol version numbers of the second equipment are compatible; verifying the identity information and the authority of the second equipment; a command is received from a second device.
Preferably, after receiving the command from the second device, if it is determined that the command of the second device cannot be correctly executed, the upper bits of the command code in the bluetooth communication packet of the preset format are set to a predetermined value.
Preferably, after the generated bluetooth communication packet is transmitted to the second device, when receiving the bluetooth communication packet acknowledgement information from the second device, it is determined that the packet transmission is successful, and when receiving the bluetooth communication packet retransmission information from the second device, the bluetooth communication packet is retransmitted.
According to another embodiment of the present invention, there is provided an operating method of a second device in a bluetooth-based communication system, the operating method including: establishing a bluetooth communication connection with a first device in a bluetooth-based communication system; receiving a bluetooth communication data packet of a predetermined format from the first device via the established bluetooth communication connection; the Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail; the packet header comprises a frame header, a frame sequence number and a frame length; the packet tail comprises CRC check bits and a frame tail; the data unit includes a command code, a command subcode, and data.
Preferably, establishing a bluetooth communication connection with a first device in a bluetooth based communication system comprises: transmitting a bluetooth communication connection request to a first device; sending a device protocol version number to the first device for verification; sending identity information and permission to the first device for verification; a command is sent to the first device.
Preferably, after receiving the bluetooth communication data packets in the predetermined format, calculating the number of the bluetooth communication data packets that should be received according to the length of the data to be transmitted and the frame length of the received bluetooth communication data packets, and determining whether the number of the bluetooth communication data packets that should be received matches the frame number of the actually received bluetooth communication data packets; when there is a lack of one or more frame numbers, it is determined that there is a loss of the Bluetooth communication packet, and a retransmission of the lost Bluetooth communication packet is requested to the first device.
Preferably, after receiving the bluetooth communication data packet of the predetermined format, if it is determined that the upper bits of the command code are not the preset value, it is determined that the first device correctly executes the command of the second device.
By adopting the technical scheme, the invention has the following beneficial effects:
the problem of data receiving and sending between mobile devices of different types and Bluetooth controller devices is solved through an improved Bluetooth communication protocol, the stability of data interaction is effectively improved, and the packet transmission efficiency is improved. The integrity of data communication is improved through the definition and the supplement mechanism of the packet bytes, and communication interruption caused by distance change or signal interference during communication of the Bluetooth device can be effectively reduced, so that data loss is prevented. And a communication encryption verification mode is adopted, so that the counterfeiting and the tampering of the information in the transmission process of the data are effectively resisted. In addition, the communication mode supports cross-platform intelligent devices such as an ios system and an android system, and has wide universality.
Drawings
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. For purposes of clarity, the same reference numbers will be used in different drawings to identify the same elements. It is noted that the drawings are merely schematic and are not necessarily drawn to scale. In the drawings:
fig. 1 is a block diagram of a configuration of a bluetooth-based communication system according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method of operation of a first device in a bluetooth based communication system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a process in which a first device and a second device establish a bluetooth communication connection in a bluetooth-based communication system according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a format of a bluetooth communication packet according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method of operation of a second device in a bluetooth-based communication system, in accordance with an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below, which are carried out on the premise of the technical scheme of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the embodiments described below.
Fig. 1 is a block diagram of a configuration of a bluetooth-based communication system according to an embodiment of the present invention. As shown in fig. 1, the bluetooth-based communication system according to the embodiment of the present invention includes a first device 100 and a second device 200, and the first device 100 and the second device 200 interact through bluetooth communication.
The first device 100 may be a mobile device with bluetooth functionality, such as a smartphone type mobile phone, a tablet computer (iPad or android Pad), or any type of mobile device known to the person skilled in the art. The second device may be a bluetooth controller device including a bluetooth communication module, for example, the bluetooth controller device may be an external energy controller.
Specifically, an implantable neurostimulator system may include mobile device, external energy accuse ware and implantable neurostimulator, and external energy accuse ware includes bluetooth communication module, installs Application on the mobile device (APP). Through operation on the application program, the mobile device can communicate with the external energy controller through the bluetooth communication module, so as to send a command to the external energy controller and send a command to the implanted nerve stimulator through the external energy controller, or read data from the external energy controller.
Fig. 2 is a flowchart of a method of operation of a first device in a bluetooth based communication system according to an embodiment of the present invention. As shown in fig. 2, an operation method of a first device (e.g., an external controller) in a bluetooth-based communication system according to an embodiment of the present invention includes: s11: establishing a bluetooth communication connection with a second device (i.e., a mobile device) in a bluetooth-based communication system; s12: acquiring data to be transmitted, and generating a Bluetooth communication data packet with a preset format for the data to be transmitted; s13: transmitting the generated Bluetooth communication data packet to the second device via the established Bluetooth communication connection; s14: and after the generated Bluetooth communication data packet is sent to the second equipment, when the Bluetooth communication data packet confirmation information from the second equipment is received, the data packet is determined to be successfully sent, and when the Bluetooth communication data packet retransmission information from the second equipment is received, the Bluetooth communication data packet is retransmitted.
Fig. 3 is a schematic diagram of a process in which a first device and a second device establish a bluetooth communication connection in a bluetooth-based communication system according to an embodiment of the present invention. As shown in fig. 3, the external Energy controller as the first device may send a Bluetooth Low Energy (BLE) broadcast signal. The mobile device as the second device can find a bluetooth controller device that can be found in the surroundings by reading BLE broadcasts of bluetooth controller devices that can be connected nearby. When the mobile equipment finds the external energy controller, the mobile equipment sends a connection request to the external energy controller, and after the external energy controller receives the connection request, the external energy controller and the mobile equipment are paired to establish Bluetooth connection.
In order for only authorized medical personnel (doctors and the like) to operate the external energy controller, the medical personnel input the password in the mobile device, and the external energy controller can verify the password from the mobile device and send information of successful verification to the mobile device if the password is successfully verified.
Existing bluetooth technology can create a problem of protocol incompatibility between different devices, for example, a device of a bluetooth low protocol version cannot cooperate with a device of a bluetooth high protocol version. However, according to an embodiment of the present invention, when the mobile device sends its bluetooth protocol version number to the external energy controller for verification, the external energy controller may be compatible with a different bluetooth protocol version number of the mobile device, so that the mobile device and the external energy controller may be normally connected.
In order to further authenticate the identity and authority of a subject exchanging data (e.g., medical-quality data and/or control data and/or monitoring data) in a bluetooth-based communication system, a mobile device sends a device identifier (devID) and a Unique Identifier (UID) to an external controller to authenticate the identity information and authority, the external controller can authenticate the identity information and authority of the mobile device and, in case the identity information and authority authentication is successful, send the information of successful authentication to the mobile device, so that the terminal device is the device of the authenticated user.
In addition, the medical personnel can log in the user role of the medical personnel in the mobile device, and the external energy controller can verify the user role from the mobile device and send the information of successful verification to the mobile device under the condition that the user role is successfully verified.
To this end, a first device (i.e., an external energy controller) and a second device (i.e., a mobile device) establish a bluetooth communication connection. Subsequently, the mobile device may send a command to the external energy controller, which may perform an operation according to the command and return the execution result to the mobile device.
In the process that the first device returns the execution result to the second device, the first device sends data about the execution result to the second device as data to be transmitted. In S12, the first device obtains the data to be transmitted, and generates a bluetooth communication data packet with a preset format for the data to be transmitted. The bluetooth communication data packet of the preset format may include a header, a data unit, and a trailer. Fig. 4 is a schematic diagram of a format of a bluetooth communication packet according to an embodiment of the present invention. As shown in fig. 4, the header includes a header, a frame number and a frame length, and has four bytes. The packet trailer includes a Cyclic Redundancy Check (CRC) Check bit and a frame trailer, for a total of three bytes. The data unit comprises a command code, a command subcode and data, and the byte number of the data unit is adjusted according to the size of an actual Bluetooth communication data packet.
The header indicates the start of the packet. The low byte of the frame number indicates the number of frames required for all data to be transmitted. The high byte represents the current frame number, and the current frame number starts from 0, is +1 after each transmission, and reaches N, where N is the number of data packets. The frame header and the frame sequence number are used for judging the frame packet cutting and distinguishing whether the frame packet is complete or not. The frame length indicates the length of the data unit in the packet.
Accordingly, whether there is a packet loss situation can be determined by the frame length and the frame number. Specifically, the number of data packets that should be received is calculated by dividing the length of data to be transmitted by the frame length of the data packets, and the number of data packets that should be received is matched with the frame number of the data packets that are actually received. If there is a lack of one or more frame sequence numbers, then it can be determined that there is a loss of a data packet, and the lost data packet corresponding to the lack of frame sequence number can be determined.
The data unit consists of three parts of command code, command subcode and data. Length of corresponding data Unit = (MTU-header-trailer) × 256, where Maximum Transmission Unit (MTU) represents the largest data packet transmitted. The unit of MTU, header and trailer is byte, and the length of data unit is bit.
The command codes have different values for indicating the type of command executed by the first device and whether its execution is correct. Specifically, when the first device cannot correctly execute the command of the second device, the upper bits of the command code may be set to a predetermined value, and the second predetermined value may be 1. When the first device can correctly execute the command of the second device, the command code may be set to be the same as the received command code.
As an example, the second device (i.e., the mobile device) sends a command for setting time, and the type attribute of the command code in the data packet of the second device is the "setting time" type, and the data attribute is specific time information. Assuming that the command code transmitted by the second device includes numbers 1, 2, 3, 4, 5 (the command code may also be a code or character) to distinguish different commands transmitted by the second device, where the number 3 represents a "set time" type command, when the first device can correctly execute the command of the second device (i.e., set time to specific time information), the value of the command code may be set to be the same as the value of the received command code, i.e., the value of the command code is set to 3.
Depending on the type of command, the data unit may further include a command subcode to determine the type of command executed by the first device.
According to another embodiment of the present invention, when the first device can correctly execute the command of the second device, the data unit may not include the error code, and data on the execution, for example, a specific time set, is recorded in the data unit. When the first device is unable to correctly execute the command of the second device, then the data unit may include an error code that occupies M bytes, where M is an integer, and the error code includes an identifying error code that is a value greater than 0.
Thus, the external controller can send the bluetooth communication data packet including the command code and/or the error code to the mobile device as a log data packet, and the user can know the execution condition of the command of the external controller on the mobile device by looking at the command code and/or the error code at the mobile device.
The CRC check bits indicate an additional value at the end of the packet, which enables the generated packet to be divided by a certain number selected in common by the transmitting end and the receiving end. And the calculation does not contain the head and tail bytes. Since the "remainder" processing is done by appending CRC check bits before the first device sends the packet, the result should be no remainder. If the remainder is available, the data packet is indicated to have errors in the transmission process. The end of the frame indicates the end of the bluetooth communication packet.
According to the embodiment of the invention, the first device can encrypt the Bluetooth communication data packet to be transmitted, and correspondingly, when the second device receives the Bluetooth communication data packet, the encrypted Bluetooth communication data packet is decrypted, so that the forgery and the falsification of information in the transmission process of the data can be effectively resisted.
At S13 and S14, the first device transmits the generated bluetooth communication packet to the second device via the bluetooth communication connection established at S11. After the first device sends the generated Bluetooth communication data packet to the second device, when the first device receives Bluetooth communication data packet confirmation information from the second device, the data packet is determined to be successfully sent, and when Bluetooth communication data packet retransmission information from the second device is received, the Bluetooth communication data packet is sent again.
According to the embodiment of the invention, when the first device and the second device perform Bluetooth data interaction, the second device performs data transceiving by using the Bluetooth communication data packet as the data communication packet after connecting to the first device. As described above, the second device may determine, by matching the frame length in the packet header and the frame sequence number, whether a packet loss situation exists in the current interaction, and if the packet is lost, re-request the corresponding lost packet data. In addition, the second device can verify whether the current response data packet of the first device is the corresponding request data packet by sending the data request command, so that the problem of data packet mismatching caused by delayed response of the first device is avoided.
Fig. 5 is a flowchart of a method of operation of a second device in a bluetooth-based communication system, in accordance with an embodiment of the present invention. As shown in fig. 5, an operation method of a second device (e.g., a mobile device) in a bluetooth-based communication system according to an embodiment of the present invention includes: s21: establishing a bluetooth communication connection with a first device (e.g., an external energy controller) in a bluetooth-based communication system; s22: a bluetooth communication data packet of a predetermined format is received from the first device via the established bluetooth communication connection.
Establishing a bluetooth communication connection with a first device in a bluetooth-based communication system includes: the method comprises the steps of sending a Bluetooth communication connection request to first equipment, sending an equipment protocol version number to the first equipment for verification after connection, sending identity information and authority to the first equipment for verification after the protocol version number is compatible, and sending a command to the first equipment after verification is successful.
The Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail; the packet header comprises a frame header, a frame sequence number and a frame length; the packet tail comprises CRC check bits and a frame tail; the data unit includes a command code, a command subcode, and data.
Further, after receiving the bluetooth communication packets of the predetermined format (S22), the first device calculates the number of bluetooth communication packets that should be received according to the length of the data to be transmitted and the frame length of the received bluetooth communication packets, and determines whether the number of bluetooth communication packets that should be received matches the frame number of the actually received bluetooth communication packets; when there is a lack of one or more frame numbers, it is determined that there is a loss of the Bluetooth communication packet, and a retransmission of the lost Bluetooth communication packet is requested to the first device.
Further, after receiving the bluetooth communication packet of the predetermined format (S22), if it is determined that the upper bits of the command code are not the preset value, it is determined that the first device correctly performs the command of the second device. The preset value may be 1.
According to various embodiments of the invention, the problem of data transceiving between different types of mobile intelligent devices and Bluetooth controller devices is solved through an improved Bluetooth communication protocol, the stability of data interaction is effectively improved, and the packet transmission efficiency is improved. The integrity of data communication is improved through the definition and the supplement mechanism of the packet bytes, communication interruption caused by distance change or signal interference during communication of the Bluetooth equipment can be effectively reduced, and data loss is prevented. And a communication encryption verification mode is adopted, so that the counterfeiting and the tampering of the information in the transmission process of the data are effectively resisted. In addition, the communication mode supports cross-platform intelligent devices such as an ios system and an android system, and has wide universality.
The various embodiments of the invention are not an exhaustive list of all possible combinations, but are intended to describe representative aspects of the invention, and what is described in the various embodiments may be applied independently or in combinations of two or more.
The above description of exemplary embodiments has been presented only to illustrate the technical solutions of the present invention, and is not intended to be exhaustive or to limit the invention to the precise forms described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (8)
1. A method of operating a first device in a bluetooth based communication system, wherein the method of operation comprises:
establishing a bluetooth communication connection with a second device in a bluetooth-based communication system;
acquiring data to be transmitted, and generating a Bluetooth communication data packet with a preset format for the data to be transmitted;
transmitting the generated bluetooth communication data packet to the second device via the established bluetooth communication connection;
the Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail;
the packet header comprises a frame header, a frame sequence number and a frame length;
the packet tail comprises CRC check bits and a frame tail;
the data unit includes a command code, a command subcode, and data.
2. The method of claim 1, wherein establishing a bluetooth communication connection with a second device comprises:
receiving a bluetooth communication connection request from a second device;
the different Bluetooth protocol version numbers of the second equipment are compatible;
verifying the identity information and the authority of the second equipment;
a command is received from a second device.
3. The method of claim 2, wherein, after receiving the command from the second device,
if it is determined that the command of the second device cannot be correctly executed, the upper bits of the command code in the bluetooth communication packet of the preset format are set to a predetermined value.
4. The method of operating a first device in a Bluetooth-based communication system as claimed in claim 1, wherein, after transmitting the generated Bluetooth communication packet to a second device,
when receiving the Bluetooth communication data packet confirmation information from the second equipment, determining that the data packet is successfully sent,
and when retransmission information of the Bluetooth communication data packet from the second device is received, the Bluetooth communication data packet is retransmitted.
5. A method of operating a second device in a bluetooth-based communication system, wherein the method of operation comprises:
establishing a bluetooth communication connection with a first device in a bluetooth-based communication system;
receiving a bluetooth communication data packet of a predetermined format from the first device via the established bluetooth communication connection;
the Bluetooth communication data packet with the preset format comprises a packet head, a data unit and a packet tail;
the packet header comprises a frame header, a frame sequence number and a frame length;
the packet tail comprises CRC check bits and a frame tail;
the data unit includes a command code, a command subcode, and data.
6. The method of claim 5, wherein establishing a Bluetooth communication connection with a first device in a Bluetooth-based communication system comprises:
transmitting a bluetooth communication connection request to a first device;
sending a device protocol version number to the first device for verification;
sending identity information and permission to the first device for verification;
a command is sent to the first device.
7. The method of operating a second device in a Bluetooth-based communication system as claimed in claim 5, wherein, after receiving a Bluetooth communication packet of a predetermined format,
calculating the number of the Bluetooth communication data packets which should be received according to the length of the data to be transmitted and the frame length of the received Bluetooth communication data packets, and determining whether the number of the Bluetooth communication data packets which should be received is matched with the frame number of the actually received Bluetooth communication data packets;
when there is a lack of one or more frame numbers, it is determined that there is a loss of the Bluetooth communication packet, and a retransmission of the lost Bluetooth communication packet is requested to the first device.
8. The method of operating a second device in a Bluetooth-based communication system as claimed in claim 5, wherein, after receiving a Bluetooth communication packet of a predetermined format,
and if the high order of the command code is not the preset value, judging that the first equipment correctly executes the command of the second equipment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116801258A (en) * | 2023-08-22 | 2023-09-22 | 北京领创医谷科技发展有限责任公司 | Wireless communication connection method, system, equipment and storage medium |
| CN116887233A (en) * | 2023-07-13 | 2023-10-13 | 北京领创医谷科技发展有限责任公司 | Patient nearby medical method, system, terminal and storage medium |
| CN116887233B (en) * | 2023-07-13 | 2024-04-30 | 北京领创医谷科技发展有限责任公司 | Patient nearby medical method, system, terminal and storage medium |
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2022
- 2022-10-25 CN CN202211311131.2A patent/CN115665710A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116887233A (en) * | 2023-07-13 | 2023-10-13 | 北京领创医谷科技发展有限责任公司 | Patient nearby medical method, system, terminal and storage medium |
| CN116887233B (en) * | 2023-07-13 | 2024-04-30 | 北京领创医谷科技发展有限责任公司 | Patient nearby medical method, system, terminal and storage medium |
| CN116801258A (en) * | 2023-08-22 | 2023-09-22 | 北京领创医谷科技发展有限责任公司 | Wireless communication connection method, system, equipment and storage medium |
| CN116801258B (en) * | 2023-08-22 | 2023-11-21 | 北京领创医谷科技发展有限责任公司 | Wireless communication connection method, system, equipment and storage medium |
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