CN111083806A - Method and device for realizing data transmission based on DMR standard - Google Patents
Method and device for realizing data transmission based on DMR standard Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method and a device for realizing data transmission based on a DMR standard, which are used for generating and sending a preset data head frame, wherein the preset data head frame carries first data type information; and generating and sending a preset data frame, wherein the preset data frame carries data matched with the first data type information. The invention can realize the transmission of a plurality of different types of data based on the formats of a data head frame and a data frame in the DMR standard, such as unencrypted short data, encrypted short data, data transmission data (positioning data, dynamic recombination control data, remote halo control data, remote death control data, revival control data and the like), other data and the like, and the coding standard of a character string can be selected to be ASCII code or Unicode. The user experience is improved.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a method and a device for realizing data transmission based on a DMR standard.
Background
Dmr (digital Mobile radio) digital trunking communication standard is an open standard designed and established by ETSI (european telecommunications standards institute) for Mobile communications. A format of a PDU (Protocol Data Unit) is defined, and when Data is transmitted, a Header frame is transmitted first, where a Data Type in a slot Type PDU is a Header Type (0 x06), and then the Data frame is transmitted, and the Data frame may be divided into a plurality of frames.
The DMR standard defines the format of a header frame including an acknowledged header frame and an unacknowledged header frame, and the format of the acknowledged header frame is shown in fig. 1. But does not define the type of data that can be transmitted, nor how to distinguish between different types of data.
Disclosure of Invention
The invention provides a method and a device for realizing data transmission based on a DMR standard, which mainly solve the problem of realizing the transmission of different types of data based on the DMR standard.
The method for realizing data transmission based on the DMR standard comprises the following steps:
a method for realizing data transmission based on DMR standard includes:
generating and sending a preset data head frame, wherein the preset data head frame carries first data type information;
and generating and sending a preset data frame, wherein the preset data frame carries data matched with the first data type information.
In some embodiments, the first data type information comprises: one of unencrypted short data, encrypted short data and data transmission data.
In some embodiments, if the first data type information carried by the preset data header frame is encrypted short data and invalid bytes are filled in data carried by the preset data frame and matched with the first data type information, the preset data header frame also carries identification information of the invalid bytes, so that a receiving party identifies the invalid bytes.
In some embodiments, the Pad Octet Count field in the preset header frame is filled with the identification information of the invalid byte.
In some embodiments, the SAP identifier field in the preset header frame is filled with the first data type information.
In some embodiments, the preset data header frame further carries custom data format identification information.
In some embodiments, the Format field in the preset header frame is filled with the custom data Format identification information.
In some embodiments, if the first data type information carried by the preset data header frame is data transmission data, the preset data frame also carries second data type information.
In some embodiments, the second data type information comprises: one of positioning data, dynamic recombination control data, remote stun control data, remote kill control data and revival control data.
In some embodiments, the first byte in the preset data frame is the second data type information; the subsequent bytes are data matched with the second data type information.
In some embodiments, if the second data type information carried by the preset data frame is dynamic reassembly control data, the data matched with the second data type information includes: dynamically reorganizing the identification information, the dynamically reorganized group number and the dynamically reorganized ID number;
if the second data type information carried by the preset data frame is the remote halo control data, the data matched with the second data type information comprises: identifying information of the remote halo control data;
if the second data type information carried by the preset data frame is remote kill control data, the data matched with the second data type information includes: the identification information of the control data is remotely killed;
if the second data type information carried by the preset data frame is revival control data, the data matched with the second data type information includes: the reactivation control data identification information.
The invention provides another method for realizing data transmission based on the DMR standard, which comprises the following steps:
receiving a data header frame, and analyzing first data type information carried in the data header frame;
receiving a data frame, and analyzing data carried in the data frame and matched with the first data type information;
and carrying out corresponding processing on the analyzed data.
The invention provides a device for realizing data transmission based on DMR standard, which comprises:
the device comprises a first generation module, a second generation module and a third generation module, wherein the first generation module is used for generating a preset data head frame, and the preset data head frame carries first data type information;
the second generation module is used for generating a preset data frame, and the preset data frame carries data matched with the first data type information;
and the sending module is used for sending the preset data head frame first and then sending the preset data frame.
The invention provides another device for realizing data transmission based on the DMR standard, which comprises:
the receiving module is used for receiving the data head frame firstly and then receiving the data frame;
the analysis module is used for analyzing first data type information carried in the data header frame and analyzing data carried in the data frame and matched with the first data type information;
and the processing module is used for carrying out corresponding processing on the analyzed data.
The method and the device for realizing data transmission based on the DMR standard can realize the transmission of a plurality of different types of data based on the formats of a data head frame and a data frame in the DMR standard, such as unencrypted short data, encrypted short data, data transmission data (positioning data, dynamic restructuring control data, remote halo control data, remote kill control data, revival control data and the like), other data and the like, and the coding standard of a character string can be selected to be ASCII code or Unicode. The user experience is improved.
Drawings
FIG. 1 is a diagram illustrating a format of a header frame in the DMR standard;
fig. 2 is a flowchart of a method for implementing data transmission based on DMR standard according to a first embodiment of the present invention;
fig. 3 is a flowchart of a method for implementing data transmission based on DMR standard according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of an apparatus for implementing data transmission based on DMR standard according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus for implementing data transmission based on the DMR standard according to a fourth embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The method and the device for realizing data transmission based on the DMR standard can be applied to the digital interphone, and can well improve the user experience particularly in a direct mode of the digital interphone. The direct mode refers to a transmission mode in which a calling sending frequency point and a called sending frequency point are the same. The present invention will be described in further detail with reference to specific examples.
First embodiment
Referring to fig. 2, fig. 2 is a flowchart of a method for implementing data transmission based on DMR standard according to a first embodiment of the present invention, where the method is mainly applied to a sender of data transmission, and the method includes:
s201, generating and sending a preset data header frame, wherein the preset data header frame carries first data type information;
s202, generating and sending a preset data frame, wherein the preset data frame carries data matched with the first data type information.
In the embodiment, according to the DMR standard, a data header frame is sent first, and then the data frame is sent, where the data frame may be a plurality of frames, and the format of the data header frame and the format of the data frame in the DMR standard are not changed by the preset data header frame and the preset data frame, but special data is carried in the preset data frame and the preset data frame.
The preset data head frame can carry the first data type information and also can carry the self-defined data format identification information, and after the receiving party receives the data head frame, the receiving party can know that the data head frame and the data frame sent by the receiving party are in the self-defined data format according to the self-defined data format identification information, and the receiving party is different from the conventional data head frame and the conventional data frame in the DMR. The self-defined data Format identification information may be filled in one or more fields in a header frame defined by the DMR standard, and the header frame with the confirmation is taken as an example for explanation, as shown in fig. 1, the self-defined data Format identification information may be filled in a Format field, the Format field defined by the DMR standard has 4 bytes, and a value of the Format field may be set to 0x08 as the self-defined data Format identification information. Header frames without acknowledgements may be processed similarly.
The first data type information carried by the preset data header frame includes but is not limited to: unencrypted short data, encrypted short data, data transmission data and other types of information. As an example, first data type information may be filled in one or more fields in a header frame defined by the DMR standard, and as illustrated in the header frame with acknowledgement, as shown in fig. 1, the first data type information may be filled in an SAP identifier field, the SAPidentifier field defined by the DMR standard has 4 bytes, the SAPidentifier field may indicate the type of unencrypted short data when the value of the SAPidentifier field is set to 1010, indicate the type of encrypted short data when the value of the SAPidentifier field is 1100, and indicate the type of data transmission when the value of the SAPidentifier field is 1101. Header frames without acknowledgements may be processed similarly. The data header frame carries the first data type information, so that the receiver can know which type of data in the data frame to be sent.
The following illustrates the contents of the corresponding data header frame and data frame when different types of data are transmitted:
if the data needing to be transmitted is unencrypted short data, setting the value of a Format field of a preset data header frame to be 0x08 as the identification information of a custom data Format, setting the value of an SAP identifier field to be 1010 to indicate the type of the unencrypted short data, and transmitting the preset data header frame; and sending a preset data frame, wherein the data in the preset data frame is unencrypted short data to be transmitted. After receiving the data header frame, the receiver analyzes the unencrypted short data type information carried in the data header frame, can know that the data in the data frame which is received subsequently is unencrypted short data, and can perform corresponding processing after analyzing the unencrypted short data without decryption.
If the data needing to be transmitted is the encrypted short data, setting the value of a Format field of a preset data header frame to be generated and sent to be 0x08 as the identification information of a custom data Format, and setting the value of an SAP identifier field to be 1100 to indicate the type of the encrypted short data; and sending a preset data frame, wherein the data in the preset data frame is encrypted short data to be transmitted. Generally, the encrypted short data is 32 bytes (256 bits), the part less than 32 bytes needs to be filled with invalid bytes to make up for 32 bytes, the data can be encrypted by using an AES algorithm, and if the part with the filled invalid bytes exists, the data can further carry identification information of the invalid bytes in a preset data header frame, so that a receiving party can identify the invalid bytes in the encrypted short data. The identification information of the invalid byte may be filled in the Pad Octet Count field in the preset header frame. After receiving the data head frame, the receiver analyzes the encrypted short data type information and the identification information of the invalid bytes carried in the data head frame, so that the receiver can know that the data in the data frame which is received later is the encrypted short data and the bytes are the invalid bytes, and can decrypt by removing the invalid bytes in the data frame after analyzing the encrypted short data.
If the data needing to be transmitted is data transmission data, setting the value of a Format field of a preset data header frame to be generated and sent to be 0x08 as self-defined data Format identification information, and setting the value of an SAP identifier field to be 1101 to represent the type of the data transmission data; and then sending a preset data frame, wherein since the data transmission data includes multiple types, in some embodiments, the data transmission data may be further classified in a refined manner, and the preset data frame may be made to carry second data type information, where the second data type information is a fine category of the data transmission data, and includes but is not limited to: positioning data, dynamic recombination control data, remote stun control data, remote kill control data, revival control data and other types of information. The positioning data can be GPS positioning data, Beidou positioning data and the like. And the dynamic restructuring control data is used for realizing dynamic restructuring Dyna group of the receiving party and rewriting the group call ID of the receiving party through an air interface. The remote halo control data is used for enabling the receiver to enter a state of being unusable, and a signaling can be sent to the receiver through an air interface. The remote kill control data is used for enabling the receiver to enter an unusable state, erasing all data of the receiver or generating physical damage, and sending a signaling to the receiver through an empty port. The revival control data is used for enabling the receiving party of the remote halo to recover normal use, and a signaling can be sent to the receiving party through an air interface. The terminal which is killed remotely can not be revived.
The second data type information may be placed in the first byte or the last byte or the middle byte of the preset data frame, and the other bytes are the data to be transmitted matching with the second data type information. Taking the first byte placed in the preset data frame as an example, a byte may be added at the beginning of the normal data frame, where the added byte is the first byte, and this byte includes 8 BITs, as an example, the highest BIT (BIT7) may be used as an encryption flag, BIT7 ═ 1 may indicate that the following data is encrypted data, the next highest BIT (BIT6) is the target of data transmission, data is transmitted to the terminal when the BIT is 0, data is transmitted to an external device (such as a PC or the like) connected to the terminal when the BIT5 is 0, character transmitted is in format when the BIT5 is 1, character transmitted is in Unicode format when the BIT5 is 1, BIT4 may reserve the ASCII default value of 0, and the remaining lower 4 BITs are second data type information, such as 0x01, which indicates the type of positioning data when the lower 4 BITs are 0x03, which indicates the type of dynamic reconfiguration control data, and is 0x04, the type of data indicating the telecine control data is 0x05, the type of data indicating the telecine control data is 0x06, the type of data indicating the revival control data is 0x02, and the other data transfer data is indicated. After the data header frame is received by the receiver, the data transmission data type information carried in the data header frame is analyzed, so that the data in the data frame which is then received can be known as data transmission data, after the second data type information in the data frame is analyzed, the data in the data frame which is then received can be known as which data transmission data, and the corresponding processing can be carried out after the data transmission data is analyzed.
If the second data type information in the first byte in the data frame is 0x01, it indicates that the data transmitted in the data frame is positioning data. The positioning data may be transmitted in BCD format, with each character representing a half byte BCD code in the following string:
HHMMSSADDMMMMMMdddmmmmmmvvvvGGGGddmmyyhhhhhh
the positioning data may be 22 bytes in total, and the data is marked separately and described below:
HHMMSS<1>,A<2>,DDMMMMMM<3>,dddmmmmmm<4>,vvvv<5>,GGGG<6>,ddmmyy<7>,hhhhhh<8>
<1 >: UTC time of 3 bytes in total
<2 >: a half byte, the highest BIT BIT7 is the effective mark of the positioning data, and is effective when 1
BIT 6: north latitude/south latitude mark, 0 is north latitude
BIT 5: east/west meridian designation, 0 is east meridian
BIT 4: altitude indicator, 0 is above sea level, and 1 is negative altitude
<3 >: latitude, ddmm. mmmm (degree division) format
<4 >: longitude, dddmm.mmmm (degrees) format
<5 >: speed, 000.0-999.9 knots
<6 >: direction of 000.0 to 359.9 DEG
<7 >: UTC date, ddmmyy (sun, month, year) format
<8 >: altitude, -9999.9-99999.9
If the second data type information in the first byte in the data frame is 0x03, it indicates that the data transmitted in the data frame is dynamic reassembly control data. If dynamic reassembly is allowed, dynamic reassembly can be achieved by sending the group number and ID number of the dynamic group. The dynamic reassembly control data may be located in bytes 2 through 11 of the data frame, for a total of 10 bytes, each byte being described as follows:
bytes 2-7: the dynamic recombination identification information of 6 bytes is used for the function to be effective after the target terminal judges that the function is legal;
byte 8: group number of dynamic recombination;
bytes 9-11: dynamically reorganized ID number.
If the second data type information in the first byte in the data frame is 0x04, it indicates that the data transmitted in the data frame is the halo control data. If the target terminal allows the remote halo, the remote halo can be realized by sending the identification information of the remote halo control data. The identification information of the remote halo control data can be located in the 2 nd to 11 th bytes of the data frame, and the total number of the bytes is 10 bytes, so that the function is effective after the target terminal judges that the function is legal.
If the second data type information in the first byte in the data frame is 0x05, it indicates that the data transmitted in the data frame is remote kill control data. If the target terminal allows the remote kill, the remote kill can be realized by sending the identification information of the remote kill control data. The remote kill control data identification information can be located in the 2 nd to 11 th bytes of the data frame, which is 10 bytes in total, and is used for the target terminal to judge that the function is valid after the target terminal is legal.
If the second data type information in the first byte in the data frame is 0x06, it indicates that the data transmitted in the data frame is revival control data. If the target terminal allows revival, revival can be realized by sending revival control data identification information. The revival control data identification information can be located in the 2 nd to 11 th bytes of the data frame, and is 10 bytes in total, and is used for the target terminal to judge that the function is valid after the target terminal is legal.
The identification information of the remote halo control data, the identification information of the remote kill control data and the identification information of the revival control data can be generated in the following ways:
the target address ID (generally three bytes, and high byte is before) is repeatedly and sequentially arranged to generate a first character string of 33 bytes, the first character string of 33 bytes takes the first 32 bytes and the 32 bytes of encrypted password input by the user as an AES algorithm to obtain a second character string of 32 bytes, and part of the bytes of the second character string of 32 bytes is intercepted from the head as the identification information of the corresponding function.
The method for implementing data transmission based on the DMR standard according to this embodiment can implement transmission of a plurality of different types of data, such as unencrypted short data, encrypted short data, data transmission data (positioning data, dynamic reassembly control data, remote halo control data, remote kill control data, revival control data, etc.), and other data, based on the format of the data header frame and the data frame in the DMR standard. The user experience is improved.
Second embodiment
Referring to fig. 3, fig. 3 is a flowchart of a method for implementing data transmission based on DMR standard according to a second embodiment of the present invention, where the method is mainly applied to a receiver of data transmission, and the method includes:
s301, receiving a data header frame, and analyzing first data type information carried in the data header frame;
s302, receiving a data frame, and analyzing data carried in the data frame and matched with the first data type information;
and S303, carrying out corresponding processing on the analyzed data.
The present embodiment receives a header frame and a data frame on the basis of the first embodiment. The structure and content of the header frame and the data frame can be referred to the first embodiment.
Third embodiment
Referring to fig. 4, fig. 4 is a schematic diagram of an apparatus for implementing data transmission based on the DMR standard according to a third embodiment of the present invention, where the apparatus is mainly used to implement the method according to the first embodiment. The device mainly includes:
a first generating module 41, configured to generate a preset data header frame, where the preset data header frame carries first data type information;
a second generating module 42, configured to generate a preset data frame, where the preset data frame carries data matched with the first data type information;
a sending module 43, configured to send the preset header frame first, and then send the preset data frame.
The apparatus described in this embodiment is mainly used to implement the method of the first embodiment, and the detailed functions of each module can refer to the descriptions of the first embodiment.
The device that realizes data transmission based on DMR standard that this embodiment provided, based on the format of data head frame and data frame in the DMR standard, can realize the transmission of a plurality of different types of data, for example, unencrypted short data, encrypted short data, data transmission data (positioning data, dynamic reconfiguration control data, remote halo control data, remote kill control data, reviving control data, etc.), other data, etc. The user experience is improved.
Fourth embodiment
Referring to fig. 5, fig. 5 is a schematic diagram of an apparatus for implementing data transmission based on the DMR standard according to a fourth embodiment of the present invention, where the apparatus is mainly used to implement the method according to the second embodiment. The device mainly includes:
a receiving module 51, configured to receive a data header frame first and then receive a data frame;
the parsing module 52 is configured to parse first data type information carried in the data header frame and parse data carried in the data frame and matched with the first data type information;
and the processing module 53 is configured to perform corresponding processing on the analyzed data.
The apparatus described in this embodiment is mainly used to implement the method of the second embodiment, and for the receiving end of the apparatus described in the third embodiment, the specific functions of each module may refer to the descriptions of the first embodiment.
The device that realizes data transmission based on DMR standard that this embodiment provided, based on the format of data head frame and data frame in the DMR standard, can realize the transmission of a plurality of different types of data, for example, unencrypted short data, encrypted short data, data transmission data (positioning data, dynamic reconfiguration control data, remote halo control data, remote kill control data, reviving control data, etc.), other data, etc. The user experience is improved.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A method for realizing data transmission based on DMR standard is characterized in that the method comprises the following steps:
generating and sending a preset data head frame, wherein the preset data head frame carries first data type information;
and generating and sending a preset data frame, wherein the preset data frame carries data matched with the first data type information.
2. The method of claim 1, wherein the first data type information comprises: one of unencrypted short data, encrypted short data and data transmission data.
3. The method according to claim 2, wherein if the first data type information carried by the preset data header frame is encrypted short data and invalid bytes are filled in data carried by the preset data frame and matching with the first data type information, the preset data header frame further carries identification information of the invalid bytes, so that a receiving side recognizes the invalid bytes.
4. The method of claim 3, wherein the identification information of the invalid byte is filled in a Pad Octet Count field in the preset header frame.
5. The method as claimed in claim 1, wherein the SAP identifier field in the predetermined header frame is filled with the first data type information.
6. The method for implementing data transmission based on the DMR standard as in claim 1, wherein the preset header frame further carries custom data format identification information.
7. The method according to claim 6, wherein the Format field in the preset header frame is filled with the custom data Format identification information.
8. The method according to claim 2, wherein if the first data type information carried by the preset data header frame is data transmission data, the preset data frame also carries second data type information.
9. The method of claim 8, wherein the second data type information comprises: one of positioning data, dynamic recombination control data, remote stun control data, remote kill control data and revival control data.
10. The method of claim 9, wherein the first byte in the predetermined data frame is the second data type information; the subsequent bytes are data matched with the second data type information.
11. The method according to claim 10, wherein if the second data type information carried in the preset data frame is dynamic reassembly control data, the data matching the second data type information includes: dynamically reorganizing the identification information, the dynamically reorganized group number and the dynamically reorganized ID number;
if the second data type information carried by the preset data frame is the remote halo control data, the data matched with the second data type information comprises: identifying information of the remote halo control data;
if the second data type information carried by the preset data frame is remote kill control data, the data matched with the second data type information includes: the identification information of the control data is remotely killed;
if the second data type information carried by the preset data frame is revival control data, the data matched with the second data type information includes: the reactivation control data identification information.
12. A method for realizing data transmission based on DMR standard is characterized in that the method comprises the following steps:
receiving a data header frame, and analyzing first data type information carried in the data header frame;
receiving a data frame, and analyzing data carried in the data frame and matched with the first data type information;
and carrying out corresponding processing on the analyzed data.
13. An apparatus for implementing data transmission based on DMR standard, comprising:
the device comprises a first generation module, a second generation module and a third generation module, wherein the first generation module is used for generating a preset data head frame, and the preset data head frame carries first data type information;
the second generation module is used for generating a preset data frame, and the preset data frame carries data matched with the first data type information;
and the sending module is used for sending the preset data head frame first and then sending the preset data frame.
14. An apparatus for implementing data transmission based on DMR standard, comprising:
the receiving module is used for receiving the data head frame firstly and then receiving the data frame;
the analysis module is used for analyzing first data type information carried in the data header frame and analyzing data carried in the data frame and matched with the first data type information;
and the processing module is used for carrying out corresponding processing on the analyzed data.
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| WO2022006850A1 (en) * | 2020-07-10 | 2022-01-13 | Qualcomm Incorporated | Transmitting encoding symbol identifier of raptor codes using control channel coding |
| CN115952515A (en) * | 2022-12-05 | 2023-04-11 | 广州柏瀚信息科技有限公司 | Data security processing method and device based on big data |
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