CN108012040B - Narrow-band-based data transmission method and terminal - Google Patents
Narrow-band-based data transmission method and terminal Download PDFInfo
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- CN108012040B CN108012040B CN201610942657.9A CN201610942657A CN108012040B CN 108012040 B CN108012040 B CN 108012040B CN 201610942657 A CN201610942657 A CN 201610942657A CN 108012040 B CN108012040 B CN 108012040B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
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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
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
- H04L1/0008—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length by supplementing frame payload, e.g. with padding bits
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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
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The invention discloses a data transmission method and a terminal based on narrow bands, wherein the method comprises the following steps: the method comprises the steps that a terminal detects whether a data frame to be transmitted exists at present or not in the process of voice communication; if so, inserting a data frame to be transmitted between the voice superframes; and transmitting the data frame through a voice channel. By the mode, the mixed transmission of data and voice is realized, the voice call of a user is not interrupted, the limited voice channel is more fully utilized, the possibility that the user receives more data information when the user carries out the voice call through narrow-band communication is realized, the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a narrowband-based data transmission method and a terminal.
Background
In the application of the existing narrowband communication system, the voice signal and the data signal are generally transmitted separately due to the limitation of bandwidth. In the digital trunking communication standard DMR and the police digital trunking PDR digital standard, although the frame format and the transmission format of voice and data are specified, a mixed voice and data transmission mode cannot be supported. For example, during narrowband voice communication, the terminal cannot transmit the data signal, and must wait for the end of voice communication to transmit the data signal.
Therefore, the communication function of the narrow band communication system is single, and the voice signal and the data signal must be transmitted separately, resulting in a reduction in data transmission speed.
Disclosure of Invention
The invention mainly solves the technical problem of providing a data transmission method and a terminal based on narrow band, which can realize the rapid mixed transmission of voice and data information on a voice channel and enrich the communication function in narrow band communication.
In order to solve the above technical problem, a first aspect of the present invention provides a method for narrowband-based data transmission, including:
the method comprises the steps that a terminal detects whether a data frame to be transmitted exists at present or not in the process of voice communication;
if the data frame exists, inserting the data frame to be transmitted between the voice superframes;
and transmitting the data frame through a voice channel.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the step of inserting, by the terminal, a data frame to be transmitted between voice superframes specifically includes:
after the terminal finishes transmitting the current voice superframe through the voice channel, judging whether the voice channel is idle;
and if the voice channel is idle, uploading the data frame to be transmitted to the voice channel.
With reference to the first implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the uploading the data frame to be transmitted to the voice channel includes:
and inserting the data frame to be transmitted after an end frame transmitted in the voice channel, wherein the end frame is arranged after the voice superframe and represents the end of a continuous voice signal formed by the voice superframe before the end frame.
With reference to the first implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the uploading the data frame to be transmitted to the voice channel specifically includes:
the terminal sends a speaking right application to a management system of the voice channel;
and when the terminal receives the approval information returned by the management system in the preset time, uploading the data frame to be transmitted to the voice channel.
With reference to any one of the first to third possible implementation manners of the first aspect, in a fourth implementation manner of the first aspect, the time for each transmission of the data frame by the voice channel is 60 milliseconds.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the step of inserting, by the terminal, a data frame to be transmitted between voice superframes specifically includes:
and the terminal inserts the data frame to be transmitted between two continuous voice superframes to be uploaded to the voice channel.
With reference to the fifth implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the step of inserting, by the terminal, the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel specifically includes:
uploading the previous voice superframe and the data frame of the two continuous voice superframes to the voice channel in sequence, and caching the next voice superframe of the two continuous voice superframes;
the step of transmitting the data frame through the voice channel specifically includes:
and after the previous voice superframe of the two continuous voice superframes and the data frame are transmitted through the voice channel, taking out the cached voice superframe and transmitting the voice superframe.
With reference to any one of the fifth to sixth possible implementation manners of the first aspect, in a seventh implementation manner of the first aspect, the time for each transmission of the data frame by the voice channel is 30 milliseconds.
In order to solve the above technical problems, a second aspect of the present invention provides a narrowband-based data transmission terminal, the terminal including a detection unit, a data frame insertion unit, and a transmission unit,
the detection unit is used for detecting whether a data frame to be transmitted exists currently or not in the process of voice communication;
the data frame insertion unit is used for inserting the data frames to be transmitted between the voice superframes when the data frames to be transmitted exist;
the transmission unit is used for transmitting the data frame through a voice channel.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the data frame insertion unit is specifically configured to, after a data frame to be transmitted exists and a current voice superframe is transmitted through the voice channel, determine whether the voice channel is idle, and upload the data frame to be transmitted to the voice channel when the voice channel is idle.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the data frame insertion unit is specifically configured to insert, when there is a data frame to be transmitted, the data frame to be transmitted after an end frame transmitted in the voice channel, where the end frame is set after the voice frame and indicates that a continuous voice signal composed of voice superframes before the end frame ends.
With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the transmission unit is specifically configured to,
sending a speaking right application to a management system of the voice channel; and when receiving the approval information returned by the management system within the preset time, uploading the data frame to be transmitted to the voice channel for transmission.
With reference to any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the time for transmitting the data frame by the voice channel is 60 milliseconds each time.
With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the data frame inserting unit is specifically configured to insert the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel.
With reference to the fifth possible implementation manner of the second aspect, in a sixth implementation manner of the second aspect, the data frame insertion unit is specifically configured to upload a previous voice superframe of the two consecutive voice superframes and the data frame to the voice channel sequentially, and buffer a next voice superframe of the two consecutive voice superframes;
the transmission unit is specifically configured to take out the cached voice superframe and transmit the voice superframe after the previous voice superframe and the data frame in the two consecutive voice superframes are transmitted through the voice channel.
With reference to any one of the fifth to sixth possible implementation manners of the second aspect, in a seventh possible implementation manner of the second aspect, the time for transmitting the data frame by the voice channel is 30 milliseconds each time.
In order to solve the above technical problem, a third aspect of the present invention provides a memory for narrowband-based data transmission, wherein the memory is used for storing a program running in the processor and data generated during the program running;
the processor executes the program stored by the memory to:
detecting whether a data frame to be transmitted exists at present or not in the process of carrying out voice communication;
inserting the data frames to be transmitted between voice superframes when the data frames to be transmitted exist;
instructing the transmitter to transmit the data frame over a voice channel.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the inserting, by the processor, the data frame to be transmitted between voice superframes includes:
and after the current voice superframe is transmitted through the voice channel, judging whether the voice channel is idle, and uploading the data frame to be transmitted to the voice channel when the voice channel is idle.
With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the executing, by the processor, the uploading the data frame to be transmitted to the voice channel specifically includes:
sending a speaking right application to a management system of the voice channel; and when receiving the approval information returned by the management system within the preset time, uploading the data frame to be transmitted to the voice channel for transmission.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the inserting, by the processor, the data frame to be transmitted between voice superframes includes: inserting the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel.
With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the inserting, by the processor, the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel includes: uploading the previous voice superframe and the data frame of the two continuous voice superframes to the voice channel in sequence, and caching the next voice superframe of the two continuous voice superframes; the processor executes the step of transmitting the data frame through the voice channel, and specifically comprises the steps of taking out the cached voice super frame and transmitting the voice super frame after the previous voice super frame and the inserted data frame in the two continuous voice super frames are transmitted through the voice channel.
The invention has the beneficial effects that: different from the situation in the prior art, in the present embodiment, during the voice communication process of the terminal based on narrowband communication, the data frame to be transmitted is inserted between the voice superframes, and the data frame is transmitted through the voice channel. The method and the device realize that a proper amount of data frames are transmitted through a voice channel in the voice communication process, the data frames are not required to be transmitted after the voice communication is finished, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between voice superframes is at least 2 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames can be improved to at least 30 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a narrowband-based data transmission method according to the present invention;
FIG. 2 is a partial flow chart of another embodiment of the narrowband-based data transmission method of the present invention;
FIG. 3 is a data transmission diagram of one embodiment of the narrowband based data transmission method of FIG. 2;
FIG. 4 is another data transmission diagram of an embodiment of a narrowband based data transmission method;
FIG. 5 is a partial flow chart of another embodiment of the narrowband-based data transmission method of the present invention;
FIG. 6 is a schematic data transmission diagram of an embodiment of the narrowband-based data transmission method of FIG. 2;
fig. 7 is a schematic structural diagram of an embodiment of a narrowband-based data transmission terminal according to the present invention;
fig. 8 is a diagram illustrating the result of another embodiment of the narrowband-based data transmission terminal of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating an embodiment of a narrowband-based data transmission method according to the present invention. The narrowband-based data transmission method of the embodiment comprises the following steps:
101: and the terminal detects whether the data frame to be transmitted exists currently in the voice communication process.
For example, a terminal based on narrowband communication, such as an intercom, establishes a voice call with another terminal, such as another intercom, and before the call is ended, the terminal detects whether there is a data frame to be transmitted currently or not at regular time or when a user detection instruction is received. If yes, executing 102, otherwise, after the setting time or when a new user detection instruction is received, continuing to execute the step for detection.
Specifically, the data frame includes not only the multiplexing call information, the encryption information, and the alias information, but also user-defined information, such as conference data, and living body feature data of the user, which is not limited herein.
102: data frames to be transmitted are inserted between the voice superframes.
In a voice call, a terminal based on narrowband communication, such as a walkie-talkie, generally converts voice information of a user into a single or continuous multiple voice superframes, and transmits the voice information through a voice channel.
According to the embodiment, on the premise of not influencing the current call, the data frame to be transmitted is inserted between the voice frames, so that the mixed transmission of voice and data is realized.
The data frame can be inserted between two consecutive voice superframes, such as a transmission process of a piece of voice information; it can also be inserted between two discontinuous voice superframes, i.e., talk gaps.
103: and transmitting the data frame through a voice channel.
After inserting the data frame to be transmitted between the voice superframes, the terminal continues to transmit the data frame through the voice channel after finishing the previous voice superframe of the data frame through the voice channel transmission, and then transmits a voice superframe behind the data frame.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating another embodiment of the narrowband-based data transmission method according to the present invention. The data transmission method in fig. 2 is a specific embodiment of the data transmission method in fig. 1, and the data frame is inserted into the talk interval for transmission.
As shown in fig. 2, after the foregoing 201 is executed, if it is detected that there is a data frame to be transmitted, the data transmission method of this embodiment executes the following steps:
201: and after the terminal finishes transmitting the current voice superframe through the voice channel, judging whether the voice channel is idle.
In the present embodiment, the data frame is inserted into the talk gap, and as shown in fig. 3, 6 single frames a to F constitute one voice superframe, and the data frame data is inserted between two discontinuous data superframes.
Specifically, as shown in fig. 3, each complete continuous speech signal, which is usually called as a push-to-talk in daily life, includes an End frame after the push-to-talk, which indicates that the continuous speech signal composed of the speech super-frame before the End frame ends, such as the End frame in fig. 3, where the End is used only for indicating the End and does not indicate the actual representation of the End frame, and in different communication protocols, there are specific End frame representations thereof, which are not limited herein. As in the DMR protocol, the end of this continuous voice communication is indicated by adding an end frame LC Terminator after the voice superframe. In PDT, an end frame P _ main is added after the voice superframe to indicate that this continuous voice communication is ended. In another embodiment, a Start symbol, i.e., a header frame, indicating the Start of a push-to-talk, is further included before the continuous speech signal, i.e., before the speech superframe for each push-to-talk, as shown in fig. 3. It should be noted that the Header frames are not expressed in the same manner in different protocols, for example, in the DMR protocol, the Header frame is expressed by an LC Header to indicate that the present push-to-talk starts, and in the PDT protocol, the Header frame may be expressed by an LC Header, but in the PDT protocol, the Header frame is not essential. And are not limited herein.
Firstly, after the terminal finishes transmitting the current voice superframe, if the terminal detects the end frame, whether the current voice channel is idle is detected. Specifically, the terminal detects whether the current communication-busy device is idle to indicate whether a voice channel is idle, and generally uses a value corresponding to the channel AT to perform quantization representation, for example, when the AT is equal to 0, it indicates that the communication-busy device is in an idle state, and when the AT is not equal to 0, it indicates that the communication-busy device is not in an idle state, and it is not in a talk gap currently.
202: and if the voice channel is idle, uploading the data frame to be transmitted to the voice channel.
If the terminal determines that the current voice channel is idle through detection, the terminal can directly upload the data frame to be transmitted to the voice channel, and generally, in order not to affect the normal conversation of the user, i.e. not to affect the normal transmission of the voice superframe, and also in order to transmit the data frame as much as possible, the time for transmitting the data frame by the voice channel each time is generally set to be 60 milliseconds.
In another embodiment, if the terminal detects that the current voice channel is still idle after the terminal finishes transmitting the current data frame, the terminal may continue to transmit the data frame to be transmitted, but in order not to affect the transmission of the voice superframe and the voice communication of the user, the time for transmitting the data frame on the current channel may be appropriately reduced, for example, reduced to 30 milliseconds or 20 milliseconds, which is not limited herein.
In some cases, not all terminals of both parties of a call may have the function of supporting mixed transmission of voice and data according to the present invention, and in this case, the data frame transmission cannot be completed in one way. Or one end of the terminals of both parties of the call supporting the voice and data mixed transmission function of the invention is transmitting data frames, while the other end continues to upload data frames due to unknown conditions, which also causes the failure of data frame transmission.
In order to avoid the above conflict, in another embodiment, when detecting that the current voice channel is idle, the terminal first sends a talk right application to the management system of the voice channel, that is, the management system confirms whether both current parties support the mixed transmission of voice and data or whether the other party uploads a data frame. And if the terminal receives the approval information returned by the management system within the preset time, uploading the data frame to be transmitted to the voice channel. If the approval information returned by the management system is not received within the preset time or the information which is not approved is received within the preset time, the terminal does not execute the step of uploading the data frame to be transmitted to the voice channel. Channel resources can be better saved, unnecessary operation of the terminal is avoided, and the service life of the terminal is prolonged.
203: and transmitting the data frame through a voice channel.
And inserting the data frame to be transmitted between the voice superframes at intervals, namely after the terminal finishes the last voice superframe of the voice information through voice channel transmission, inserting the data frame into the end frame of the voice information, continuing to transmit the data frame through the voice channel, and then transmitting the voice superframe of the next voice information.
Through the above manner, the present embodiment achieves that an appropriate amount of data frames are transmitted through the voice channel in the idle voice channel, the data frames are not transmitted until the voice communication is finished, the transmission rate of the data frames is increased, and the transmission speed of the data frames inserted between the voice superframes is at least 6 times of the transmission speed of transmitting 20ms low-speed data and only transmitting 9 Chinese characters per second by inserting a small number of data frames in the middle of a single frame (as shown in fig. 4, 6 single frames A-F form a voice superframe, and the middle positions of B-E4 single frames in each voice superframe can transmit 5ms low-speed data, and the transmission time of the data frames is also increased to at least 60 ms. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for narrowband-based data transmission according to still another embodiment of the present invention. The data transmission method of this embodiment is another specific embodiment of the data transmission method of fig. 2, and the data frame is inserted into a piece of voice information for transmission.
As shown in fig. 5, after the foregoing 201 is executed, if it is detected that there is a data frame to be transmitted, the method for narrowband-based data transmission according to this embodiment executes the following steps:
501: and the terminal inserts the data frame to be transmitted between two continuous voice superframes to be uploaded to the voice channel.
The data frame of the present embodiment is inserted in one voice information transmission process, that is, the data frame is inserted between two consecutive voice superframes, as shown in fig. 6.
Specifically, since two continuous voice frames generally represent a complete and uninterrupted sentence or a session on the two parties of the call, in order not to affect the normal reception of the voice signal by the receiving party, and also to transmit the data frame within a limited time, in this embodiment, the previous voice superframe and the data frame in the two continuous voice superframes are sequentially uploaded to the voice channel, and the subsequent voice superframe in the two continuous voice superframes into which the data frame is to be inserted is buffered through a voice buffering technology, and if the subsequent voice frame is buffered in a data area, the data frame to be transmitted is inserted.
502: and transmitting the data frame through a voice channel.
And after the transmission of the data frame is finished, taking out the cached voice superframe and transmitting the cached voice superframe.
In order not to affect the normal conversation of the user, i.e. not to affect the normal transmission of the voice superframe, and also to transmit data frames as many as possible, the time for transmitting the data frames by the voice channel each time is generally set to be 30 milliseconds.
For the voice receiving terminal, since the terminal does not interrupt the reception of the voice superframe in order to receive the voice terminator, the 30 ms data transmission time does not affect the quality of the voice call of the user at all.
Through the mode, the embodiment realizes that a proper amount of data frames are transmitted through the voice channel in the voice passing process without waiting for the completion of voice communication, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between the voice superframes is at least 2 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames is also improved to at least 30 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an embodiment of the narrowband-based data transmission terminal according to the present invention. As shown in fig. 7, terminal 700 according to the present embodiment includes data frame insertion section 701, transmission section 702, and detection section 703.
The detecting unit 703 is configured to detect whether a data frame to be transmitted currently exists during voice communication, and send a detection result to the data frame inserting unit 701.
The data frame inserting unit 701 is configured to insert the data frame to be transmitted between the voice superframes when the data frame to be transmitted exists.
In a voice call, a terminal based on narrowband communication, such as a walkie-talkie, generally converts voice information of a user into a single or continuous multiple voice superframes, and transmits the voice information through a voice channel.
The data frame inserting unit 701 of the present embodiment inserts a data frame to be transmitted between voice frames on the premise of not affecting the current call, thereby implementing mixed transmission of voice and data.
The data frame inserting unit 701 may insert a data frame between two consecutive voice superframes, such as a transmission process of a piece of voice information; data frames may also be inserted between two voice superframes, i.e., talk gaps, that are not contiguous.
Specifically, the data frame includes not only the multiplexing call information, the encryption information, and the alias information, but also user-defined information, such as conference data, and living body feature data of the user, which is not limited herein.
The transmission unit 702 is configured to transmit the data frame through a voice channel.
After the data frame to be transmitted is inserted between the voice superframes by the data frame inserting unit 701, the terminal continues to transmit the data frame through the voice channel after completing the transmission of the previous voice superframe of the data frame through the voice channel, and then transmits the next voice superframe of the data frame.
In a specific embodiment, the data frame inserting unit 701 is specifically configured to determine whether the voice channel is idle after the data frame to be transmitted exists and the current voice superframe is transmitted through the voice channel, and upload the data frame to be transmitted to the voice channel when the voice channel is idle.
Specifically, the data frame of the present embodiment is inserted into the talk gap, and the data frame is inserted between two discontinuous data superframes.
Specifically, each complete continuous voice signal, which is usually called a push-to-talk in daily life and then includes an end frame, indicates the end of the continuous voice signal composed of the voice superframe before the end frame, for example, in the DMR protocol, the voice superframe is followed by an end frame LC Terminator to indicate the end of the continuous voice communication. In PDT, an end frame P _ main is added after the voice superframe to indicate that this continuous voice communication is ended. In addition, in another embodiment, a Header frame, which is a start symbol indicating the start of one-time push-to-talk, is further included before the continuous voice signal, that is, before the voice super frame for each push-to-talk, and it should be noted that the Header frame is not expressed in the same manner in different protocols, for example, in the DMR protocol, the Header frame is expressed by an LC Header to indicate the start of the current push-to-talk, and in the PDT protocol, the Header frame may be expressed by an LC Header, but in the PDT protocol, the Header frame is not essential. And are not limited herein.
First, the data frame insertion unit 701 detects that the current voice channel is non-idle if detecting the end frame after the current voice superframe is transmitted. In a specific embodiment, the data frame inserting unit 701 indicates whether the voice channel is idle by detecting whether the current communication-busy device is idle, and generally uses a corresponding value of the channel AT for quantization, for example, when AT is equal to 0, it represents that the communication-busy device is in an idle state, and when AT is not equal to 0, it represents that the communication-busy device is not in an idle state, and is not in a talk gap currently.
If the data frame inserting unit 701 determines that the current voice channel is idle through detection, the data frame to be transmitted may be directly uploaded to the voice channel, and in general, in order not to affect the normal conversation of the user, that is, the normal transmission of the voice superframe, and also in order to transmit as many data frames as possible, the time for the voice channel to transmit the data frame each time is generally set to 60 milliseconds.
Further, if the data frame inserting unit 701 detects that the current voice channel is still idle after the current data frame is transmitted, the data frame to be transmitted may be continuously transmitted, but in order not to affect the transmission of the voice superframe and affect the voice communication of the user, the time for transmitting the data frame on the current channel may be appropriately reduced, for example, reduced to 30 milliseconds or 20 milliseconds, which is not limited herein.
In some cases, not all terminals of both parties of a call may have the function of supporting mixed transmission of voice and data according to the present invention, and in this case, the data frame transmission cannot be completed in one way. Or one end of the terminals of both parties of the call supporting the voice and data mixed transmission function of the invention is transmitting data frames, while the other end continues to upload data frames due to unknown conditions, which also causes the failure of data frame transmission.
In order to avoid the above conflict, in another embodiment, when detecting that the current voice channel is idle, the data frame inserting unit 701 first sends a speaking right application to the management system of the voice channel, that is, the management system confirms whether both current parties support the mixed transmission of voice and data or whether the other party uploads a data frame. And if the approval information returned by the management system is received within the preset time, uploading the data frame to be transmitted to the voice channel. The data frame inserting unit 701 does not perform the step of uploading the data frame to be transmitted to the voice channel if approval information returned from the management system is not received within a predetermined time or if unauthorized information is received within a predetermined time. Channel resources can be better saved, unnecessary operation of the terminal is avoided, and the service life of the terminal is prolonged.
The transmission unit 702 is specifically configured to complete the last voice superframe of the voice message through the voice channel transmission, and after the data insertion unit 701 inserts the data frame into the end frame of the voice message, continue to transmit the data frame through the voice channel, and then transmit the voice superframe of the next voice message.
Through the mode, the embodiment realizes that a proper amount of data frames are transmitted through the voice channel in the idle voice channel, the data frames are not required to be transmitted after the voice communication is finished, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between the voice superframes is at least 6 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames is also improved to at least 60 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
In another specific embodiment, the data frame inserting unit 701 is specifically configured to insert the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel when the data frame to be transmitted exists.
The data frame of the present embodiment is inserted in one voice information transmission process, that is, the data frame is inserted between two consecutive voice superframes.
Specifically, since two continuous voice frames generally represent a complete and uninterrupted sentence or a session on the two parties of the call, in order not to affect the normal reception of the voice signal by the receiving party, and also to transmit the data frame within a limited time, in this embodiment, the data frame inserting unit 701 sequentially uploads the previous voice superframe and the data frame of the two continuous voice superframes to the voice channel, and buffers the subsequent voice superframe of the two continuous voice superframes into which the data frame is to be inserted by using a voice buffering technology, for example, buffers the subsequent voice frame in the data area, thereby implementing the insertion of the data frame to be transmitted.
The transmission unit 702 is specifically configured to continue to transmit the data frame through the voice channel after the transmission of the previous voice superframe of two consecutive voice superframes inserted into the data frame is completed through the voice channel, and after the transmission of the data frame is completed, take out the cached next voice superframe and transmit the data frame.
In order not to affect the normal conversation of the user, i.e. not to affect the normal transmission of the voice superframe, and also to transmit data frames as many as possible, the time for transmitting the data frames by the voice channel each time is generally set to be 30 milliseconds.
For the voice receiving terminal, since the terminal does not interrupt the reception of the voice superframe in order to receive the voice terminator, the 30 ms data transmission time does not affect the quality of the voice call of the user at all.
Through the mode, the embodiment realizes that a proper amount of data frames are transmitted through the voice channel in the voice passing process without waiting for the completion of voice communication, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between the voice superframes is at least 2 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames is also improved to at least 30 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
Referring to fig. 8, fig. 8 is a schematic structural diagram of another embodiment of the terminal for narrowband-based data transmission according to the present invention. As shown in fig. 8, the terminal 800 of the present embodiment includes a processor 801, a memory 802, a transmitter 804, and a receiver 805. The transmitter 804, receiver 805, processor 801, and memory 802 are coupled together by a bus 803, where the bus 803 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. But for clarity of illustration the various buses are labeled as bus 803 in the figures.
The transmitter 804 is configured to transmit voice superframes or data frames to other terminals.
The receiver 805 is configured to receive voice superframes or data frames transmitted by other terminals.
The memory 802 is used for storing programs running in the processor and data generated during the running of the programs.
In the embodiment of the present invention, the processor 801 performs the following operations by calling a program stored in the memory 802.
The processor 801 is configured to detect whether a data frame to be transmitted currently exists in a voice communication process; and inserting the data frames to be transmitted between the voice superframes when the data frames to be transmitted exist.
In a voice call, a terminal based on narrowband communication, such as a walkie-talkie, generally converts voice information of a user into a single or continuous multiple voice superframes, and transmits the voice information through a voice channel.
The processor 801 of this embodiment inserts the data frame to be transmitted between the voice frames on the premise of not affecting the current call, thereby implementing the mixed transmission of voice and data. The processor 801 may insert a data frame between two consecutive voice superframes, such as a transmission process of a piece of voice information; data frames may also be inserted between two voice superframes, i.e., talk gaps, that are not contiguous.
Specifically, the data frame includes not only the multiplexing call information, the encryption information, and the alias information, but also user-defined information, such as conference data, and living body feature data of the user, which is not limited herein.
The processor 801 is also configured to transmit the data frame over a voice channel.
Specifically, after inserting the data frame to be transmitted between the voice superframes, the processor 801 continues to transmit the data frame through the voice channel after the terminal completes transmission of the previous voice superframe of the data frame through the voice channel, and then transmits the next voice superframe of the data frame.
In a specific embodiment, when there is a data frame to be transmitted, the processor 801 is specifically configured to determine whether the voice channel is idle after the current voice superframe is transmitted through the voice channel, and upload the data frame to be transmitted to the voice channel when the voice channel is idle.
Specifically, the data frame of the present embodiment is inserted into the talk gap, and the data frame is inserted between two discontinuous data superframes.
Specifically, each complete continuous voice signal, which is usually called a push-to-talk in daily life and then includes an end frame, indicates the end of the continuous voice signal composed of the voice superframe before the end frame, for example, in the DMR protocol, the voice superframe is followed by an end frame LC Terminator to indicate the end of the continuous voice communication. In PDT, an end frame P _ main is added after the voice superframe to indicate that this continuous voice communication is ended. In addition, in another embodiment, a Header frame, which is a start symbol indicating the start of one-time push-to-talk, is further included before the continuous voice signal, that is, before the voice super frame for each push-to-talk, and it should be noted that the Header frame is not expressed in the same manner in different protocols, for example, in the DMR protocol, the Header frame is expressed by an LC Header to indicate the start of the current push-to-talk, and in the PDT protocol, the Header frame may be expressed by an LC Header, but in the PDT protocol, the Header frame is not essential. And are not limited herein.
First, after the processor 801 finishes transmitting the current voice superframe, if the end frame is detected, it detects whether the current voice channel is idle. In a specific embodiment, the processor 801 indicates whether the voice channel is idle by detecting whether the current communication-busy device is idle, and generally uses a corresponding value of the channel AT for quantization, such as when AT is equal to 0, indicating that the communication-busy device is in an idle state, and when AT is not equal to 0, indicating that the communication-busy device is not in an idle state, and currently not in a talk gap.
If the processor 801 determines that the current voice channel is idle through detection, the data frame to be transmitted may be directly uploaded to the voice channel, and in general, in order not to affect the normal conversation of the user, i.e., not to affect the normal transmission of the voice superframe, and also in order to transmit as many data frames as possible, the time for the voice channel to transmit the data frame each time is generally set to 60 milliseconds.
In another embodiment, if the processor 801 detects that the current voice channel is still idle after the current data frame is transmitted, the data frame to be transmitted may be continuously transmitted, but in order not to affect the transmission of the voice superframe and affect the voice communication of the user, the time for transmitting the data frame on the current channel may be appropriately reduced, for example, reduced to 30 milliseconds or 20 milliseconds, and is not limited herein.
In some cases, not all terminals of both parties of a call may have the function of supporting mixed transmission of voice and data according to the present invention, and in this case, the data frame transmission cannot be completed in one way. Or one end of the terminals of both parties of the call supporting the voice and data mixed transmission function of the invention is transmitting data frames, while the other end continues to upload data frames due to unknown conditions, which also causes the failure of data frame transmission.
In order to avoid the conflict between the above situations, in another embodiment, when detecting that the current voice channel is idle, the processor 801 first sends a request for the right of talk to the management system of the voice channel, that is, the management system confirms whether both current parties support the mixed transmission of voice and data or whether the other party uploads a data frame. And if the approval information returned by the management system is received within the preset time, uploading the data frame to be transmitted to the voice channel. If the approval information returned by the management system is not received within the predetermined time or if the information which is not approved is received within the predetermined time, the processor 801 does not execute the step of uploading the data frame to be transmitted to the voice channel. Channel resources can be better saved, unnecessary operation of the terminal is avoided, and the service life of the terminal is prolonged.
After inserting the data frame to be transmitted between the voice superframes at intervals, the processor 801 continues to transmit the data frame through the voice channel after completing the previous voice superframe of the data frame through the voice channel transmission, and then transmits the next voice superframe of the data frame.
Through the mode, the embodiment realizes that a proper amount of data frames are transmitted through the voice channel in the idle voice channel, the data frames are not required to be transmitted after the voice communication is finished, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between the voice superframes is at least 6 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames is also improved to at least 60 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
In another specific embodiment, the processor 801 is specifically configured to insert the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel when the data frame to be transmitted exists.
The data frame of the present embodiment is inserted in one voice information transmission process, that is, the data frame is inserted between two consecutive voice superframes.
Specifically, since two continuous voice frames generally represent a complete and uninterrupted sentence or a session on the two parties of the call, in order not to affect the normal reception of the voice signal by the receiving party, and also to transmit the data frame within a limited time, in this embodiment, the processor 801 sequentially uploads the previous voice superframe and the data frame in the two continuous voice superframes to the voice channel, and buffers the subsequent voice superframe in the two continuous voice superframes of the data frame to be inserted by using a voice buffering technology, and if the subsequent voice frame is buffered in the data area, the data frame to be transmitted is inserted.
After the transmission of the voice channel is completed, the processor 801 continues to transmit the data frame through the voice channel after the previous voice superframe of two consecutive voice superframes inserted into the data frame is inserted, and after the transmission of the data frame is completed, takes out the cached next voice superframe and transmits the data frame.
In order not to affect the normal conversation of the user, i.e. not to affect the normal transmission of the voice superframe, and also to transmit data frames as many as possible, the time for transmitting the data frames by the voice channel each time is generally set to be 30 milliseconds.
For the voice receiving terminal, since the terminal does not interrupt the reception of the voice superframe in order to receive the voice terminator, the 30 ms data transmission time does not affect the quality of the voice call of the user at all.
Through the mode, the embodiment realizes that a proper amount of data frames are transmitted through the voice channel in the idle voice channel, the data frames are not required to be transmitted after the voice communication is finished, the transmission rate of the data frames is improved, the transmission speed of the data frames inserted between the voice superframes is at least 6 times of the transmission speed of a small number of data frames inserted between single frames, and the transmission time of the data frames is also improved to at least 60 milliseconds. In addition, on the premise of not interrupting the current voice call, the hybrid transmission of data and voice is realized, the voice call of a user is not influenced, a limited voice channel is more fully utilized, and the user can receive more data information at the same time when the voice call is carried out through narrow-band communication, so that the functions of the terminal are enriched, the functions of the narrow-band voice communication are perfected, and convenience is brought to the user.
The processor 801 may also be referred to as a CPU (Central Processing Unit). The memory 802 may include a read-only memory and a random access memory, and provides instructions and data to the processor 901. A portion of the memory 802 may also include non-volatile random access memory (NVRAM).
The methods disclosed in the embodiments of the present invention described above may be implemented in the processor 801 or implemented by the processor 801. The processor 801 may be an integrated circuit chip having signal processing capabilities.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The processor 801 described above may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software elements in the decoding processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and combines the hardware to complete the steps of the method.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. A narrowband-based data transmission method is characterized by comprising the following steps:
the method comprises the steps that a terminal detects whether a data frame to be transmitted exists at present or not in the process of voice communication;
if the data frame exists, inserting the data frame to be transmitted between the voice superframes;
and transmitting the voice superframe and the data frame through a voice channel.
2. The method according to claim 1, wherein the step of the terminal inserting the data frame to be transmitted between voice superframes specifically comprises:
after the terminal finishes transmitting the current voice superframe through the voice channel, judging whether the voice channel is idle;
and if the voice channel is idle, uploading the data frame to be transmitted to the voice channel.
3. The method of claim 2, wherein uploading the data frame to be transmitted to the voice channel comprises:
and inserting the data frame to be transmitted after an end frame transmitted in the voice channel, wherein the end frame is arranged after the voice superframe and represents the end of a continuous voice signal formed by the voice superframe before the end frame.
4. The method according to claim 2, wherein the step of uploading the data frame to be transmitted to the voice channel specifically comprises:
the terminal sends a speaking right application to a management system of the voice channel;
and when the terminal receives the approval information returned by the management system in the preset time, uploading the data frame to be transmitted to the voice channel.
5. The method according to claim 1, wherein the step of the terminal inserting the data frame to be transmitted between voice superframes specifically comprises:
and the terminal inserts the data frame to be transmitted between two continuous voice superframes to be uploaded to the voice channel.
6. The method according to claim 5, wherein the step of the terminal inserting the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel specifically comprises:
uploading the previous voice superframe and the data frame of the two continuous voice superframes to the voice channel in sequence, and caching the next voice superframe of the two continuous voice superframes;
the step of transmitting the voice superframe and the data frame through a voice channel specifically includes:
and after the previous voice superframe of the two continuous voice superframes and the data frame are transmitted through the voice channel, taking out the cached voice superframe and transmitting the voice superframe.
7. A narrowband based data transmission terminal, characterized in that the terminal comprises a transmitter, a processor and a memory,
the memory is used for storing programs running in the processor and data generated in the running process of the programs;
the processor executes the program stored by the memory to:
detecting whether a data frame to be transmitted exists at present or not in the process of carrying out voice communication;
inserting the data frames to be transmitted between voice superframes when the data frames to be transmitted exist;
instructing the sender to transmit the voice superframe and the data frame through a voice channel.
8. The terminal according to claim 7, wherein the processor performs the inserting the data frame to be transmitted between voice superframes, specifically comprising:
and after the current voice superframe is transmitted through the voice channel, judging whether the voice channel is idle, and uploading the data frame to be transmitted to the voice channel when the voice channel is idle.
9. The terminal according to claim 8, wherein the processor executes the uploading of the data frame to be transmitted to the voice channel, specifically comprising:
sending a speaking right application to a management system of the voice channel; and when receiving the approval information returned by the management system within the preset time, uploading the data frame to be transmitted to the voice channel for transmission.
10. The terminal according to claim 7, wherein the processor performs the inserting the data frame to be transmitted between voice superframes, specifically comprising:
inserting the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel.
11. The terminal according to claim 10, wherein the processor performs the inserting the data frame to be transmitted between two consecutive voice superframes to be uploaded to the voice channel, specifically comprising:
uploading the previous voice superframe and the data frame of the two continuous voice superframes to the voice channel in sequence, and caching the next voice superframe of the two continuous voice superframes;
the processor executes the step of transmitting the voice superframe and the data frame through a voice channel, and specifically includes:
and after the previous voice superframe of the two continuous voice superframes and the inserted data frame are transmitted through the voice channel, taking out the cached voice superframe and transmitting the voice superframe.
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