CN104836659A - Control method of Bluetooth communication interaction - Google Patents
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Abstract
The invention discloses a control method of Bluetooth communication interaction. The control method includes the steps: an intelligent mobile device sends a data packet to an intelligent password device through Bluetooth, and the data packet consists of a command head and a data field; after receiving the data packet, the intelligent password device firstly verifies the command head, and then verifies the data field, if the command head is successfully verified, the intelligent password device executes a service instruction, returns a service instruction result, and returns a state packet which includes a state packet head, and if the command head is discovered to be wrong in verification, the intelligent password device does not execute the service instruction, and returns the state packet head; the intelligent password device sends the state packet to the intelligent mobile device through Bluetooth communication; and the intelligent mobile device verifies the state packet and judges whether the first byte of the state packet head is a first number of bytes or a second number of bytes, and the intelligent password device executes the service instruction. The control method of Bluetooth communication interaction has the advantage that encryption communication of command data is adopted, confidentiality of data communication is improved, thereby effectively resisting stealing and tampering of sensitive information in a transmission process.
Description
Technical field
The present invention relates to the control method that a kind of bluetooth communication is mutual.
Background technology
The design original intention of bluetooth communication be facilitate between mobile device with accessory carry out low cost, the radio communication of low-power consumption is connected, and become IEEE802.15 standard now.General Bluetooth system structure by bottom hardware module, intermediate protocol layer and application layer three part form, bottom hardware module comprises baseband layer, Link Manager layer and radio layer, information between upper-layer software module and bottom hardware module interface and data are transmitted by the explanation of HCI (HCI), intermediate protocol layer generally includes logic link control and adapting protocol, service discovery protocol, serial ports simulation protocol etc., and application layer is generally correspond to various application model and application program.When prior art bluetooth is mutual, rely on the security mechanism of Bluetooth protocol itself, remarkable shortcoming is: there is the situation that blue-teeth data is lost, when especially carrying out communication between intelligent movable equipment and intelligent cipher equipment, there is the risk that data are intercepted and crack.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide the control method that a kind of bluetooth communication is mutual, it is easy to use, effectively can promote the mutual fail safe of bluetooth communication.
To achieve these goals, the technical solution used in the present invention is: the control method that a kind of bluetooth communication is mutual, it is characterized in that, comprising: Intelligent mobile equipment is by bluetooth to intelligent cipher equipment sending data bag, and described packet is made up of command header and data field; After intelligent cipher equipment receives packet, first check command head, then checking data territory, if the success of check command head, then intelligent cipher equipment performs service order, return service order result, and return state bag, state packet header drawn together by described state handbag, if check command head mistake, then intelligent cipher equipment does not perform service order, direct return state packet header; Described state bag is sent to Intelligent mobile equipment by bluetooth communication by intelligent cipher equipment; Intelligent mobile equipment verification state bag, judges that the first byte in state packet header is the first byte number, or the second byte number, if the first byte number, then identifies Current communications mistake; If the second byte number, then identify Current communications success, intelligent cipher equipment performs service order.
Beneficial effect of the present invention is:
The first, realize simple, on the basis of Bluetooth protocol own; the data of communication can support link encryption, the confidentiality of protected data, by Bluetooth protocol solve intelligent movable equipment with the coupling between intelligent cipher equipment, be connected and data communication; the data of communication have anti-replay function, in data packet head, add flag bit; change after each communication; as added 1 or add random number, during next communication, continuous ten times flag bit can not be identical; otherwise middle connection breaking, reconnects.
The second, be widely used, by CRC check mode, improve the integrality of data communication, when effectively can make up bluetooth equipment communication, reduce the communicating interrupt that change or signal disturbing because of distance cause; Adopt the encryption communication of order data, promote the confidentiality of data communication, effectively stealing and distorting sensitive information in opposing transmitting procedure.Can support and adapt to the intelligent movable equipment such as bluetooth 2.1, bluetooth 3.0, bluetooth 4.0, there is versatility widely.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the mutual control method flow chart of bluetooth communication of the present invention.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.Specification subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection range of the application is when being as the criterion depending on the claims person of defining.
Please refer to Fig. 1, the mutual control method of bluetooth communication of the present invention comprises: Intelligent mobile equipment is by bluetooth to intelligent cipher equipment sending data bag, and described packet is made up of command header and data field; After intelligent cipher equipment receives packet, first check command head, then checking data territory, if the success of check command head, then intelligent cipher equipment performs service order, return service order result, and return state bag, state packet header drawn together by described state handbag, if check command head mistake, then intelligent cipher equipment does not perform service order, direct return state packet header; Described state bag is sent to Intelligent mobile equipment by bluetooth communication by intelligent cipher equipment; Intelligent mobile equipment verification state bag, judges that the first byte in state packet header is the first byte number, or the second byte number, if the first byte number, then identifies Current communications mistake; If the second byte number, then identify Current communications success, intelligent cipher equipment performs service order.
Preferably, the bluetooth first completed between Intelligent mobile equipment with intelligent cipher equipment is connected.
Intelligent mobile equipment is by bluetooth to intelligent cipher equipment sending data bag, and packet is made up of command header and data field, and command header is 10 bytes, with certain value between byte number 1[0x00-0xFF] beginning, and comprise data length, identification code, CRC check position, retains position.The total length of data length order head and data field, identification code wants consistent when a Packet Generation is mutual with reception, and CRC check position calculates whole packet.
Intelligent cipher equipment receives packet, first check command head, and whether comprise first byte is the byte number 1 consulted, if not, then do not respond or return mistake.Check that whether the real data length received is consistent with the data length in command header, if inconsistent, then return mistake.Check CRC check position, according to consult CRC computation rule, to packet calculate CRC, and with the CRC check position comparison in command header, if inconsistent, then return mistake.After command header verification succeeds, intelligent cipher equipment reads data field, and what deposit in data field is actual service order, prepares to perform corresponding service order by intelligent cipher equipment, and returns execution result.
If in previous step, check command head mistake, then intelligent cipher equipment does not perform the service order in data field, direct return state packet header, and data field is empty, state packet header starts with the first byte number, and comprise the data length returned, identification code, the data length of reception, CRC check position, retains position.If the success of check command head, then intelligent cipher equipment performs service order, and returns service order result, return state bag, be made up of state packet header and data field, state packet header total length 10 byte, with the second byte number beginning, and comprise data length, identification code, CRC check position, retains position.Data field is service executing result.
State bag is sent to Intelligent mobile equipment by bluetooth communication by intelligent cipher equipment.
First Intelligent mobile equipment verifies state packet header.The first byte in detected state packet header, checks that whether the real data length received is consistent with the data length in state packet header; Check that whether identification code is consistent with the identification code sent in packet; Check CRC check position, according to consult CRC computation rule, to packet calculate CRC, and with the CRC check position comparison in command header.The first byte in judgement state packet header is the first byte number, or the second byte number, if with the first byte number beginning, represent that Current communications is mistake; If the second byte number beginning, mark communication success, and intelligent cipher equipment performs service order, and Intelligent mobile equipment can obtain the execution result of service order from state bag data field.
One time bluetooth communication completes.
Byte number 1, first byte number of the present embodiment, the second byte number is all byte value, and scope is the Arbitrary Digit between 0x00-0xFF, in the project can be self-defined, requires that the first byte number can not be identical with the second byte number.
Packet and state packet format
Bluetooth Packet type is divided into two classes: packet and state bag.Transmission is initiated with the command header of 10 bytes, is defined as follows:
Intelligent mobile equipment _ to_ intelligent cipher device package command header:
| side-play amount | byte length | describe |
| 0 | 1 | mark, certain fixed byte 1 between 0x00-0xFF |
| 1 | 2 | whole data packet length, small end. |
| 3 | 1 | identification code |
| 4 | 4 | retain |
| 8 | 2 | cRC check code |
During communication abnormality, intelligent cipher equipment _ to_ Intelligent mobile equipment state packet header:
When communication is normal, intelligent cipher equipment _ to_ Intelligent mobile equipment state packet header:
| side-play amount | byte length | describe |
| 0 | 1 | mark, certain fixed byte 3 between 0x00-0xFF |
| 1 | 2 | the data packet length returned, small end. |
| 3 | 1 | identification code (from Intelligent mobile equipment) |
| 4 | 4 | retain |
| 8 | 2 | cRC check code |
As specific embodiment, transmission Bluetooth commands packet and CRC computational process are:
Packet command head is 10 bytes, and data field length is relevant according to each order.
Command header first byte is certain fixed byte between 0x00-0xFF, and when technical solution of the present invention is shaped, this value is determined, such as 0x6F.
Packet command head format sample: 6F 0,D00 00 00000000 69B3+CMDData
When first character joint is for non-X value, X and byte number 1, intelligent cipher equipment is without response or return mistake.
Second and the 3rd byte be the length (small end) of whole packet, comprise command header and data field CMDData.
4th byte is identification code T, byte, and transmission is consistent with acceptance, can be used for, to the communication data contrast sent and receive, avoiding receiving other data by mistake.During communication, this value is specified by Intelligent mobile equipment, is random number for the first time, after this changes according to certain rules.
Four middle 0x00 bytes, temporarily retain, be set to 0 during use, when for non-zero value, it is legal also to think.
9th and crossed joint be CRC check position.When calculating CRC check position, be calculate together with data field command header, wherein the 9th and the tenth of command header the deposit crc value, these two bytes participate in calculating CRC with 0.
CMDData is the business order expecting that intelligent cipher equipment performs.
Preferably, the CRC computational process receiving communication successful data is:
Receive the successful state of communication and be surrounded by packet header and data field composition, packet header is 10 bytes, and data field is determined by intelligent cipher equipment execution result.
State packet header first byte is certain fixed byte between 0x00-0xFF, and when technical solution of the present invention is shaped, this value is determined, such as 0x80.
State package head format example: 80 0,D00 00 00000000 69B3+CMDData
When first character joint is for R value, i.e. the second byte number, represents that bluetooth communication is normal.
Second and the 3rd byte be the length (small end) of whole packet, comprise packet header and data field ReData.
4th byte is identification code T, byte, consistent with identification code in transmission packet, can be used for, to the communication data contrast sent and receive, avoiding receiving other data by mistake.During communication, this value is specified by Intelligent mobile equipment, is random number for the first time, after this changes according to certain rules.
Four middle 0x00 bytes, temporarily retain, be set to 0 during use, when for non-zero value, it is legal also to think.
9th and crossed joint be CRC check position.When Intelligent mobile equipment checking CRC check position, according to rule, these two bytes participated in calculating CRC with 0, and to calculate together with data field state packet header, the 9th and the tenth of last and state packet header is that the crc value deposited compares.
ReData is the result data returned after intelligent cipher equipment performs business order.
Preferably, the CRC computational process receiving miscommunication data is:
The state bag receiving miscommunication only has packet header, and do not have data field, packet header is 10 bytes.
State packet header first byte is certain fixed byte between 0x00-0xFF, can not be identical with the successful byte number of communication, and when technical solution of the present invention is shaped, this value is determined, such as 0x96.
State package head format example: 96 0,D00 00 00000000 462A
When first character joint is for E value, i.e. the first byte number, represents that bluetooth communication is abnormal.
Second and the 3rd byte be the length (small end) of state bag, only have state packet header, 10 bytes are fixed as 0x0A00.
4th byte is identification code T, byte, consistent with identification code in transmission packet, can be used for, to the communication data contrast sent and receive, avoiding receiving other data by mistake.During communication, this value is specified by Intelligent mobile equipment, is random number for the first time, after this changes according to certain rules.
5th byte 0x00, temporarily retains, is set to 0 during use, and when for non-zero value, it is legal also to think.
6th and the 7th byte is the length sending packet, so that search the packet of faulting instruction.
9th and crossed joint be CRC check position.When Intelligent mobile equipment checking CRC check position, according to rule, these two bytes participated in calculating CRC with 0, and calculate state bag, the 9th and the tenth of last and state packet header is that the crc value deposited compares.
Beneficial effect of the present invention is:
The first, realize simple, on the basis of Bluetooth protocol own; the data of communication can support link encryption, the confidentiality of protected data, by Bluetooth protocol solve intelligent movable equipment with the coupling between intelligent cipher equipment, be connected and data communication; the data of communication have anti-replay function, in data packet head, add flag bit; change after each communication; as added 1 or add random number, during next communication, continuous ten times flag bit can not be identical; otherwise middle connection breaking, reconnects.
The second, be widely used, by CRC check mode, improve the integrality of data communication, when effectively can make up bluetooth equipment communication, reduce the communicating interrupt that change or signal disturbing because of distance cause; Adopt the encryption communication of order data, promote the confidentiality of data communication, effectively stealing and distorting sensitive information in opposing transmitting procedure.Can support and adapt to the intelligent movable equipment such as bluetooth 2.1, bluetooth 3.0, bluetooth 4.0, there is versatility widely.
Above-mentioned explanation illustrate and describes some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in application contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the application, then all should in the protection range of the application's claims.
Claims (9)
1. the control method that bluetooth communication is mutual, is characterized in that, comprising:
Intelligent mobile equipment is by bluetooth to intelligent cipher equipment sending data bag, and described packet is made up of command header and data field;
After intelligent cipher equipment receives packet, first check command head, then checking data territory, if the success of check command head, then intelligent cipher equipment performs service order, return service order result, and return state bag, state packet header drawn together by described state handbag, if check command head mistake, then intelligent cipher equipment does not perform service order, direct return state packet header;
Described state bag is sent to Intelligent mobile equipment by bluetooth communication by intelligent cipher equipment;
Intelligent mobile equipment verification state bag, judges that the first byte in state packet header is the first byte number, or the second byte number, if the first byte number, then identifies Current communications mistake; If the second byte number, then identify Current communications success, intelligent cipher equipment performs service order.
2. the control method that bluetooth communication according to claim 1 is mutual, is characterized in that, described command header is 10 bytes, and the scope of first byte is 0x00-0xFF, comprises data length, identification code, CRC check position, retains position.
3. the control method that bluetooth communication according to claim 1 is mutual, is characterized in that, described state packet header is 10 bytes, and the scope of first byte is 0x00-0xFF, comprises data length, identification code, CRC check position, retains position.
4. the control method that bluetooth communication according to claim 3 is mutual, is characterized in that, described state bag also comprises data field.
5. the control method that bluetooth communication according to claim 4 is mutual, is characterized in that, also comprises the execution result that described Intelligent mobile equipment obtains service order from state bag data field.
6. the control method that bluetooth communication according to claim 2 is mutual, it is characterized in that, described CRC check comprises: the CRC calculation procedure sending Bluetooth commands packet, receives the CRC calculation procedure of communication successful data, and receives the CRC calculation procedure of miscommunication data.
7. the control method that bluetooth communication according to claim 6 is mutual, is characterized in that, the CRC calculation procedure of described transmission Bluetooth commands packet comprises:
Setting command head first byte is certain fixed byte between 0x00-0xFF;
When first character joint is for non-X value, X and byte number 1, intelligent cipher equipment is without response or return mistake;
Second and the 3rd byte be the length of whole packet, comprise command header and data field;
4th byte is identification code T, byte, and transmission is consistent with reception, for contrasting the communication data sent and receive;
Four middle 0x00 bytes, temporarily retain, are set to 0 during use;
9th and crossed joint be CRC check position, calculate CRC check position time, be that command header is calculated together with data field, wherein the 9th and the tenth of command header the deposit crc value, these two bytes with 0 participate in calculate CRC.
8. the control method that bluetooth communication according to claim 6 is mutual, is characterized in that, the CRC calculation procedure of described reception communication successful data comprises:
Arrange and receive the successful state bag of communication, described state bag is made up of packet header and data field, and packet header is 10 bytes, and data field is determined by intelligent cipher equipment execution result;
State packet header first byte is certain fixed byte between 0x00-0xFF;
When first character joint is for R value, represent that bluetooth communication is normal;
Second and the 3rd byte be the length of whole packet, comprise packet header and data field;
4th byte is identification code T, byte, consistent with identification code in transmission packet, for contrasting the communication data sent and receive;
Four middle 0x00 bytes, temporarily retain, are set to 0 during use;
9th and crossed joint be CRC check position, these two bytes participated in calculating CRC with 0, and to calculate together with data field state packet header, the 9th and the tenth of last and state packet header is that the crc value deposited compares.
9. the control method that bluetooth communication according to claim 6 is mutual, is characterized in that, the CRC calculation procedure of described reception miscommunication data comprises:
Arrange the state bag receiving miscommunication, described state bag only has packet header, does not have data field, and packet header is 10 bytes;
State packet header first byte is certain fixed byte between 0x00-0xFF, can not be identical with the successful byte number of communication;
When first character joint is for E value, represent that bluetooth communication is abnormal;
Second and the 3rd byte be the length of state bag, only have state packet header, 10 bytes are fixed as 0x0A00;
4th byte is identification code T, byte, consistent with identification code in transmission packet, for contrasting the communication data sent and receive;
5th byte 0x00, temporarily retains, is set to 0 during use;
6th and the 7th byte is the length sending packet;
9th and crossed joint be CRC check position, these two bytes participated in calculating CRC with 0, and calculate state bag, the 9th and the tenth of last and state packet header is that the crc value deposited compares.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108631914A (en) * | 2017-03-23 | 2018-10-09 | 展讯通信（上海）有限公司 | Blue-teeth data verification, method of reseptance and device and bluetooth equipment |
| CN113824626A (en) * | 2021-09-24 | 2021-12-21 | 广东科瑞德电气科技有限公司 | Communication management method for preventing information interaction loss |
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