CN114866185B - Method for transmitting multi-priority data frame - Google Patents
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- CN114866185B CN114866185B CN202210300562.2A CN202210300562A CN114866185B CN 114866185 B CN114866185 B CN 114866185B CN 202210300562 A CN202210300562 A CN 202210300562A CN 114866185 B CN114866185 B CN 114866185B
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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
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Abstract
The invention discloses a method for transmitting multi-priority data frames, which is used for transmitting the data frames through a transmission system, wherein the transmission system comprises a first transmission terminal, a second transmission terminal and a transmission channel, the first transmission terminal sends the data frames to the second transmission terminal through the transmission channel, the data frames are divided into one or more data blocks which are transmitted in a preset time slice, the data blocks are divided into first priority data blocks, other priority data blocks and invalid data blocks, the data frames are divided into first priority data frames and other priority data frames, when the first priority data frames and other priority data frames are not used, the invalid data blocks are transmitted in a preset time slice, the data blocks comprise priority fields, the priority fields are the first priority data blocks, the priority fields are the data blocks of bit sequences C or D, the data blocks of the priority fields are the other priority data blocks, and the priority fields are the data blocks of the invalid data blocks of the bit sequences I.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for transmitting multi-priority data frames.
Background
In a communication system, data transmission is a common method, such as a medium access control layer, a physical layer, etc., using a layered structure. After the medium access control layer of the transmitting end transmits the data frame to the physical layer, the data frame is split into a plurality of data blocks for transmission, and after the data blocks reach the receiving end through the transmission channel, the same data frame as the transmitting end needs to be obtained at the medium access control layer of the receiving end. Therefore, the transmitting end needs to identify the data blocks so that the receiving end can combine different data blocks to obtain the data frame.
Meanwhile, in some applications, data with different priorities needs to be transmitted, for example, in an audio-video communication system, a timing control command often has a higher priority, and a priority of a video signal and an audio signal is lower than that of the timing control command, while other data, for example, log information, data for remotely updating firmware, etc., have low requirements on real-time performance, and often have a lower priority. When the data frames with different priorities are segmented into a plurality of data blocks for transmission, the data blocks of the data frames with different priorities are mixed together, and the difficulty of recovering the data frames by the receiving end is further increased.
At present, a method of adding a field in a data block is commonly adopted so as to recover a data frame at a receiving end, and the specific method is as follows: 1. adding a frame sequence number field in the data block, and identifying which data frame the data block belongs to; 2. adding a block sequence number field in a data block, and counting the data blocks belonging to the same data frame; 3. and adding a boundary identification field into the data blocks to identify the first data block, the last data block and the middle data block which form the data frame. The first two methods require more bandwidth to be used for transmitting the frame sequence number field or the block sequence number field. In the third method, the boundary identification field does not explicitly identify the priority of the data frame to which the data block belongs, and when the reliability of the communication channel is not high or the protection capability of the check code on the data is not strong, the data block is easy to be lost. When the first data block or the last data block forming the data frame is lost and the data blocks of the data frames with different priorities are mixed together for transmission, the data frame to which the lost data block belongs cannot be correctly received at the receiving end, and a plurality of subsequent data frames cannot be correctly received.
Therefore, it is necessary to study a method for transmitting multi-priority data frames, by adding a priority field in a data block, the boundary of the data frame to which the data block belongs can be identified and the priority of the data frame can be explicitly indicated under the condition of occupying less transmission bandwidth, so as to improve the reliability of data transmission.
Disclosure of Invention
A method for transmitting multi-priority data frames is used for transmitting the data frames through a transmission system, the transmission system comprises a first transmission terminal, a second transmission terminal and a transmission channel, the first transmission terminal sends the data frames to the second transmission terminal through the transmission channel, the data frames are divided into one or more data blocks to be transmitted in a preset time slice, the data blocks are divided into first priority data blocks, other priority data blocks and invalid data blocks, the data frames are divided into first priority data frames and other priority data frames, the first priority data frames are divided into one or more first priority data blocks to be transmitted, the other priority data frames are divided into one or more other priority data blocks to be transmitted, when the first priority data frames and the other priority data frames are not included, the invalid data blocks are transmitted in the preset time slice, the priority fields are alternatively bit sequences A, B, C, D, I which are different from each other, the priority fields are bit sequences A or B, the data blocks which are bit sequences A or B, the priority data frames are the first priority data blocks, the priority data frames are the other priority data blocks, the other priority data blocks which are bit sequences C or the priority data blocks which are the bit sequences D and the other priority data blocks which are the invalid data blocks.
Preferably, the data length of the data blocks is the same, and is 66 bits or 34 bits. The bit sequence A, B, D is 2 bits in length. During the transmission of one of the data blocks no other data is allowed to be inserted.
Preferably, when each a-priority data frame is transmitted, bit sequence a is used as the priority field of the 1 st data block in the data frame, and bit sequence B is used as the priority field of the other data blocks except the 1 st data block in the data frame.
Preferably, when transmitting one a-priority data frame, a bit sequence a is used as the priority field of all data blocks in the data frame, and when transmitting the next a-priority data frame, a bit sequence B is used as the priority field of all data blocks in the data frame, the bit sequences a and B alternately using transmission of adjacent a-priority data frames.
Preferably, the other priority refers to a second priority different from the first priority, the other priority data frame refers to a second priority data frame, the other priority data block refers to a second priority data block, and in the transmission process of one data frame, a data frame with a higher priority is allowed to be inserted, and a data frame with the same or a lower priority is not allowed to be inserted. When each b priority data frame is transmitted, bit sequence C is used as the priority field of the 1 st data block in the data frame, and bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame.
Preferably, the other priority refers to a second priority different from the first priority, the other priority data frame refers to a second priority data frame, the other priority data block refers to a second priority data block, and in the transmission process of one data frame, a data frame with a higher priority is allowed to be inserted, and a data frame with the same or a lower priority is not allowed to be inserted. When transmitting one b-priority data frame, bit sequence C is used as the priority field of all data blocks in the data frame, and when transmitting the next b-priority data frame, bit sequence D is used as the priority field of all data blocks in the data frame, the bit sequences C and D being used alternately to transmit adjacent b-priority data frames.
Preferably, the other priority refers to an b priority and a c priority, the other priority data frames refer to an b priority data frame and a c priority data frame, the other priority data blocks refer to an b priority data block and a c priority data block, the priority of the a priority, the b priority and the c priority are different from each other, and in the transmission process of one data frame, the insertion of a data frame with a higher priority is allowed, and the insertion of a data frame with the same or a lower priority is not allowed. The bit sequence C is replaced by 3 mutually different bit sequences E, F, G, the bit sequences A, B, D, E, F, G, I being mutually different. When each b priority data frame is transmitted, a bit sequence E is used as the priority field of the 1 st data block in the data frame, a bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame, and when each c priority data frame is transmitted, a bit sequence F is used as the priority field of the 1 st data block in the data frame, and a bit sequence G is used as the priority field of the other data blocks except the 1 st data block in the data frame.
Preferably, the other priority refers to an b priority and a c priority, the other priority data frames refer to an b priority data frame and a c priority data frame, the other priority data blocks refer to an b priority data block and a c priority data block, the priority of the a priority, the b priority and the c priority are different from each other, and in the transmission process of one data frame, the insertion of a data frame with a higher priority is allowed, and the insertion of a data frame with the same or a lower priority is not allowed. The bit sequence C is replaced by 3 mutually different bit sequences E, F, G, the bit sequences A, B, D, E, F, G, I being mutually different. When each b priority data frame is transmitted, a bit sequence E is used as a priority field of a 1 st data block in the data frame, a bit sequence D is used as a priority field of other data blocks except the 1 st data block in the data frame, when one c priority data frame is transmitted, a bit sequence F is used as a priority field of all data blocks in the data frame, when the next c priority data frame is transmitted, a bit sequence G is used as a priority field of all data blocks in the data frame, and the bit sequences F and G are alternately used for transmitting adjacent c priority data frames.
Preferably, the other priority refers to an b priority and a c priority, the other priority data frames refer to an b priority data frame and a c priority data frame, the other priority data blocks refer to an b priority data block and a c priority data block, the priority of the a priority, the b priority and the c priority are different from each other, and in the transmission process of one data frame, the insertion of a data frame with a higher priority is allowed, and the insertion of a data frame with the same or a lower priority is not allowed. The bit sequence C is replaced by 2 mutually different bit sequences E, F, the bit sequences A, B, D, E, F, I being mutually different. When each b priority data frame is transmitted, the bit sequence E is used as the priority field of the 1 st data block in the data frame, the bit sequence D is used as the priority field of other data blocks except the 1 st data block in the data frame, the data frame with the c priority only contains one data block, and when each c priority data frame is transmitted, the bit sequence F is used as the priority field of the unique data block in the data frame.
Preferably, the other priorities refer to priorities P2, P3 to Pn, n is an integer greater than 3, the other priority data frames refer to priority data frames P2, P3 to Pn, the other priority data blocks refer to priority data blocks P2, P3 to Pn, and priorities of priority a, P2, P3 to Pn are different from each other, and in a transmission process of one data frame, a data frame with a higher priority is allowed to be inserted, and a data frame with the same or a data frame with a lower priority is not allowed to be inserted.
Preferably, the preset time slice is a preset fixed time slice.
Preferably, the preset time slices are preset set time slices.
The beneficial effects of the invention are as follows:
the method for transmitting the multi-priority data frame not only can identify the boundary of the data frame to which the data block belongs under the condition of occupying less transmission bandwidth, but also can clearly indicate the priority of the data frame by adding the priority field in the data block so as to improve the reliability of data transmission.
Drawings
FIG. 1 is a block diagram of a transmission system and a transmission structure of a data frame of a method for transmitting multi-priority data frames according to the present invention;
FIG. 2 is a block diagram of a data block and a block diagram of a set of data blocks in a method of transmitting a multi-priority data frame according to the present invention;
FIG. 3 is a schematic diagram of a transmission structure of a first priority data frame in a method of transmitting a multi-priority data frame according to the present invention;
FIG. 4 is a schematic diagram of another transmission structure of a first priority data frame in a method of transmitting a multi-priority data frame according to the present invention;
FIG. 5 is a schematic diagram of a transmission structure of a second priority data frame in a method of transmitting a multi-priority data frame according to the present invention;
FIG. 6 is a schematic diagram of another transmission structure of a second priority data frame in a method of transmitting a multi-priority data frame according to the present invention;
FIG. 7 is a schematic diagram of a transmission structure of a first priority data frame and a second priority data frame in a method for transmitting multi-priority data frames according to the present invention;
FIG. 8 is a schematic diagram of a transmission structure of an B-priority data frame and an C-priority data frame in a method of transmitting multi-priority data frames according to the present invention;
FIG. 9 is a schematic diagram of another transmission structure of a B-priority data frame and a C-priority data frame in a method for transmitting multi-priority data frames according to the present invention;
FIG. 10 is a schematic diagram of another transmission structure of a B-priority data frame and a C-priority data frame in a method for transmitting multi-priority data frames according to the present invention;
FIG. 11 is a schematic diagram of a transmission structure of a first priority data frame, a second priority data frame, and a third priority data frame in a method of transmitting multi-priority data frames according to the present invention;
wherein:
1. first transmission terminal 2 second transmission terminal
3. Transmission channel
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, in an application embodiment of a method of transmitting a multi-priority data frame of the present invention, the method of transmitting a multi-priority data frame is used for transmitting a plurality of data frames having different priorities through a transmission system including a first transmission terminal 1, a second transmission terminal 2, and a transmission channel 3, the first transmission terminal 1 transmitting the data frames to the second transmission terminal 2 through the transmission channel 3.
A data frame may be divided into one or more data block transmissions, but a data block can only be used to transmit data from within a data frame. In the present invention, if a data block is used to transmit data from a data frame, the data block is referred to as belonging to the data frame, or the data block is a data block of the data frame.
In the invention, after the transmission of one data block is finished, the transmission of the next data block can be started immediately; the transmission of the next data block may be started again after a certain time interval, in which case other data may be transmitted between the two data blocks; however, the transmission of one data block cannot be interrupted, and the transmission of one data block is continuous in time, i.e. no other data is allowed to be inserted during the transmission of one data block.
As shown in fig. 2, in this embodiment of the application, the data block includes a priority field PR and a payload field PL, the payload field PL is used to carry data in a data frame, the data in the data frame is filled in the payload field PL, the priority field PR is used to indicate the priority of the data frame to which the data block belongs, and one data frame is divided into one or more data block transmissions.
The data block set is formed by adding a data head H and a check code SC, wherein the data head H can contain information such as the type, the length, the serial number and the like of the data block set, and the check code SC can be an error detection code or an error correction code or both the error detection code and the error correction code and is used for detecting or correcting the error of the data block set.
In this embodiment, every n data block sets are transmitted on the transmission channel 3, a synchronization block is inserted to synchronize clocks or data at the receiving end. The sync block S1, the data block sets F11, F12, … …, F1n, the sync block S2, and the data block sets F21, F22, … …, F2n, … … are sequentially transmitted in time order on the transmission channel 3. The above description of the set of data blocks and the sync block is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. In other embodiments of the present invention, the set of data blocks may or may not include the data header H or the check code SC; one or more data blocks may be included in one set of data blocks; the synchronization block may not be transmitted on the transmission channel 3; other data such as data representing control information or IDLE (IDLE) may also be transmitted between the data blocks.
In the invention, the data blocks are divided into first priority data blocks, other priority data blocks and invalid data blocks, the data frames are divided into first priority data frames and other priority data frames, the first priority data frames are divided into one or more first priority data block transmissions, the other priority data frames are divided into one or more other priority data block transmissions, and the invalid data blocks are transmitted in a preset time slice when the first priority data frames and the other priority data frames are not available.
The priority field PR is alternatively a bit sequence A, B, C, D, I different from each other, the data block of the priority field PR being a bit sequence a or B is a priority data block, the data block of the priority field PR being a bit sequence C or D is another priority data block, the data block of the priority field PR being a bit sequence I is an invalid data block.
In the present invention, the bit sequence A, B, C, D, I can be binary sequences "01", "10", "110", "00", "111", respectively, and the bit sequence A, B, D has a length of 2 bits.
In the present invention, A, B, C, D, I may be other bit sequences different from each other. In the present invention, the first transmission terminal 1 divides a data frame into one or more data blocks to be transmitted in a preset time slice, one data block is transmitted in a preset time slice, the second transmission terminal 2 receives the data block in the preset time slice, the first transmission terminal 1 needs to transmit the data block even if no data frame needs to be transmitted in the preset time slice, the first transmission terminal 1 transmits an invalid data block in the preset time slice when no data frame exists, and the invalid data block does not contain data in the data frame.
In the embodiment shown in fig. 2, the lengths of the data blocks may be the same, and a typical length is 66 bits or 34 bits, and the lengths of the data blocks may be different, or the lengths of the data blocks may be the same but not 66 bits or 34 bits.
When the length of the data block is 66 bits, the data block with the priority field A, B, D has a total of 64 bits of 8 bytes, and when the length of the data block is 34 bits, the data block with the priority field A, B, D has a total of 32 bits of 4 bytes, and the 8 bytes or 4 bytes of the payload field is convenient for carrying 8-bit byte-based data content in a digital system.
In the embodiment shown in fig. 2, the lengths of the data blocks, the data header H, the check code SC, and the synchronization blocks, the number of data blocks in one data block set and the number of data block sets between two synchronization blocks may be constant during the transmission process, but may also be changed according to the protocol convention between the first transmission terminal 1 and the second transmission terminal 2.
In the embodiment shown in fig. 2, if the number of data blocks in one data block set and the number of data block sets between two synchronization blocks are constant during transmission, or the method of the change is known in advance by the first transmission terminal 1 and the second transmission terminal 2 although the change is made, after the second transmission terminal 2 synchronizes through the synchronization mechanism, the data blocks can be received according to a preset time slice, and the second transmission terminal 2 can count to a preset time point through a counter after synchronization to determine the preset time slice.
In the invention, the preset time slice which can be counted and determined by the counter is a preset fixed time slice.
The synchronization block shown in fig. 2 may be used for the synchronization mechanism, and in one embodiment the synchronization block contains a synchronization sequence, and the second transmission terminal 2 performs synchronization by identifying the synchronization sequence in the synchronization block. In order to reduce the bandwidth overhead, the frequency of sending the synchronization block can be reduced, and a special case is that the synchronization block is transmitted once only before transmission starts, so that the bandwidth overhead of synchronization is reduced to the maximum extent.
Other synchronization mechanisms may be selected by the present invention, and the present invention is not limited to the selection of synchronization mechanisms.
One advantage of using a predetermined fixed time slice for transmission is that bandwidth overhead can be reduced to a maximum, for example, to reduce bandwidth overhead, synchronization can be performed only once before transmission starts, whereas in normal data transmission, only data blocks are transmitted, and no other data content is transmitted, i.e. no data header H, check code SC, synchronization block as shown in fig. 2 needs to be transmitted.
In another preset time slice implementation method, the data header H as shown in fig. 2 may be used to identify the start of a set of data blocks, where the set of data blocks contains a set of 2 or more preset time slices for transmitting 2 or more data blocks, and the second transmission terminal 2 determines the start position of the set of 2 or more preset time slices by identifying the data header H instead of counting by a counter.
In the present invention, the preset time slices identified by the data header H are preset set time slices.
In the present invention, the first transmission terminal 1 divides a data frame into one or more data blocks for transmission in a preset time slice, where the preset time slice is a preset fixed time slice or a preset set time slice.
In order to reduce bandwidth overhead, the data header H may be used only to identify the starting position of a set of 2 or more preset time slices, without other functions, so that the length of the data header H may be reduced, but the length of the data header H is smaller, which increases bandwidth overhead compared with the preset fixed time slice mode.
However, in another aspect, the header H in the preset aggregate time slice is common to a group of 2 or more preset time slices, and if the number of preset time slices in the group is large, the bandwidth overhead of the data blocks transmitted to each preset time slice is far less than the common mode that each data block carries the start identifier.
As shown in fig. 3, in an application embodiment of the present invention, a first priority data frame 1, a first priority data frame 2, and a first priority data frame 3 are sequentially transmitted in a preset time slice, and PR fields of data blocks thereof are bit sequences a and B.
As shown in fig. 3, when each a-priority data frame is transmitted, bit sequence a is used as the priority field of the 1 st data block in the data frame, and bit sequence B is used as the priority field of the other data blocks except the 1 st data block in the data frame.
As shown in fig. 3, the invalid data block is transmitted at a preset time slice when there is no data frame.
As shown in fig. 4, in another application embodiment of the present invention, a first priority data frame 1, a first priority data frame 2, and a first priority data frame 3 are sequentially transmitted in a preset time slice, and PR fields of data blocks thereof are bit sequences a and B.
As shown in fig. 4, when one a-priority data frame is transmitted, bit sequence a is used as the priority field of all data blocks in the data frame, and when the next a-priority data frame is transmitted, bit sequence B is used as the priority field of all data blocks in the data frame, and bit sequences a and B are used alternately to transmit adjacent a-priority data frames.
As shown in fig. 4, the invalid data block is transmitted at a preset time slice when there is no data frame.
In the present invention, the data block with the priority field PR being the bit sequence C or D is another priority data block, and in the embodiments shown in fig. 5, 6 and 7, the other priority refers to the b priority different from the a priority, the other priority data frame refers to the b priority data frame, the other priority data block refers to the b priority data block, and the b priority data block PR field is the bit sequence C or D.
As shown in fig. 5, in an application embodiment of the present invention, the b priority data frame 1, the b priority data frame 2, and the b priority data frame 3 are sequentially transmitted in a preset time slice, and PR fields of the data blocks are bit sequences C and D.
As shown in fig. 5, when each b-priority data frame is transmitted, bit sequence C is used as the priority field of the 1 st data block in the data frame, and bit sequence D is used as the priority field of the other data blocks except for the 1 st data block in the data frame.
As shown in fig. 5, the invalid data block is transmitted at a preset time slice when there is no data frame.
As shown in fig. 6, in another application embodiment of the present invention, the b priority data frame 1, the b priority data frame 2, and the b priority data frame 3 are sequentially transmitted in a preset time slice, and PR fields of the data blocks are bit sequences C and D.
As shown in fig. 6, when one b-priority data frame is transmitted, bit sequence C is used as the priority field of all data blocks in the data frame, and when the next b-priority data frame is transmitted, bit sequence D is used as the priority field of all data blocks in the data frame, and bit sequences C and D are used alternately to transmit adjacent b-priority data frames.
As shown in fig. 6, the invalid data block is transmitted at a preset time slice when there is no data frame.
In the invention, in the transmission process of one data frame, the data frame with higher priority is allowed to be inserted, and the data frame with the same or lower priority is not allowed to be inserted.
As shown in fig. 7, an embodiment of transmitting a data frame with a first priority and a data frame with a second priority is shown, in the embodiment shown in fig. 7, the first priority is higher than the second priority, and in other embodiments (not shown in the present invention), the first priority may be lower than the second priority.
As shown in fig. 7, the method of representing the a-priority data frame 1, the a-priority data frame 2, and the a-priority data frame 3 by the bit sequences a and B adopts the method shown in fig. 4, and the method of representing the B-priority data frame 1, the B-priority data frame 2, and the B-priority data frame 3 by the bit sequences C and D adopts the method shown in fig. 5.
After the transmission of the second priority data frame 1 is started, when the 2 nd second priority data block of the second priority data frame 1 is transmitted, the first priority data frame 1 applies for transmission, and the priority of the first priority data frame is higher than that of the second priority data frame, so that after the transmission of the currently transmitted second priority data block is finished, the next data block of the second priority data frame 1 is not transmitted, and the transmission of the data block of the first priority data frame 1 is started; after all the data blocks of the first priority data frame 1 are transmitted, the remaining data blocks of the second priority data frame 1 can be continuously transmitted.
And after the transmission of the second priority data frame 1 is finished, the second priority data frame 2 is transmitted, and after the transmission of the second priority data frame 2 is finished, the second priority data frame 3 is transmitted. When the 1 st second priority data block of the second priority data frame 3 is transmitted, the first priority data frame 2 applies for transmission, and the priority of the first priority data frame is higher than that of the second priority data frame, so that after the transmission of the currently transmitted second priority data block is finished, the next data block of the second priority data frame 3 is not transmitted, and the data block of the first priority data frame 2 is started to be transmitted; after all the data blocks of the first priority data frame 2 are transmitted, the 2 nd second priority data block of the second priority data frame 3 can be continuously transmitted.
When the 2 nd second priority data block of the second priority data frame 3 is transmitted, the first priority data frame 3 applies for transmission, and the priority of the first priority data frame is higher than that of the second priority data frame, so that after the transmission of the currently transmitted second priority data block is finished, the next data block of the second priority data frame 3 is not transmitted, and the data block of the first priority data frame 3 is started to be transmitted; after all the data blocks of the first priority data frame 3 are transmitted, the remaining data blocks of the second priority data frame 3 can be continuously transmitted.
As shown in fig. 7, the invalid data block is transmitted at a preset time slice when there is no data frame.
In the present invention, the data blocks with the priority field PR being the bit sequence C or D are other priority data blocks, and in the embodiments shown in fig. 8 and 9, the other priority refers to the b priority and the C priority, the other priority data frame refers to the b priority data frame and the C priority data frame, the other priority data block refers to the b priority data block and the C priority data block, and the priorities of the a priority, the b priority, and the C priority are different from each other.
In the embodiment shown in fig. 8 and 9, the bit sequence C is replaced by 3 mutually different bit sequences E, F, G, so that the data blocks with the priority fields PR being the bit sequences E, F, G or D are other priority data blocks, i.e. the data blocks with the priority fields PR being the bit sequences E, F, G or D are the b priority data block and the C priority data block, and the bit sequences A, B, D, E, F, G, I are mutually different.
In the present invention, the bit sequence E, F, G can be binary sequences "11000", "11001", "11010", respectively.
In the present invention, E, F, G may be other bit sequences different from each other.
As shown in fig. 8, an embodiment of transmitting the b priority data frame and the c priority data frame simultaneously is shown, in the embodiment shown in fig. 8, the c priority is higher than the b priority, and in other embodiments (not shown in the present invention), the c priority may be lower than the b priority.
As shown in fig. 8, PR fields of data blocks of the b priority data frame 1, the b priority data frame 2, and the b priority data frame 3 are bit sequences E and D, representing the b priority, and when each b priority data frame is transmitted, the bit sequence E is used as the priority field of the 1 st data block in the data frame, and the bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame.
As shown in fig. 8, PR fields of data blocks of the propyl priority data frame 1, the propyl priority data frame 2, and the propyl priority data frame 3 are bit sequences F and G, representing propyl priority, and when each propyl priority data frame is transmitted, the bit sequence F is used as the priority field of the 1 st data block in the data frame, and the bit sequence G is used as the priority field of the other data blocks except the 1 st data block in the data frame.
After the transmission of the second priority data frame 1 is started, when the 2 nd second priority data block of the second priority data frame 1 is transmitted, the third priority data frame 1 applies for transmission, and as the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 1 is not transmitted, and the data block of the third priority data frame 1 is started to be transmitted; after all the data blocks of the third priority data frame 1 are transmitted, the remaining data blocks of the second priority data frame 1 can be continuously transmitted.
After the transmission of the second priority data frame 1 is finished, the second priority data frame 2 is transmitted, after the transmission of the second priority data frame 2 is finished, the second priority data frame 3 is transmitted, when the 1 st second priority data block of the second priority data frame 3 is transmitted, the third priority data frame 2 applies for transmission, and because the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 3 is not transmitted any more, and the data block of the third priority data frame 2 is transmitted; after all the data blocks of the third priority data frame 2 are sent, the 2 nd second priority data block of the second priority data frame 3 can be sent continuously.
When the 2 nd second priority data block of the second priority data frame 3 is transmitted, the third priority data frame 3 applies for transmission, and the third priority data frame is higher than the second priority data frame, so that after the transmission of the second priority data block currently being transmitted is completed, the next data block of the second priority data frame 3 is not transmitted, and the data block of the third priority data frame 3 is started to be transmitted; after all the data blocks of the third priority data frame 3 are transmitted, the remaining data blocks of the second priority data frame 3 can be continuously transmitted.
As shown in fig. 8, the invalid data block is transmitted at a preset time slice when there is no data frame.
As shown in fig. 9, an embodiment of transmitting the b priority data frame and the c priority data frame simultaneously is shown, in the embodiment shown in fig. 9, the c priority is higher than the b priority, and in other embodiments (not shown in the present invention), the c priority may be lower than the b priority.
As shown in fig. 9, PR fields of data blocks of the b priority data frame 1, the b priority data frame 2, and the b priority data frame 3 are bit sequences E and D, representing the b priority, and when each b priority data frame is transmitted, the bit sequence E is used as the priority field of the 1 st data block in the data frame, and the bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame.
As shown in fig. 9, PR fields of data blocks of the propyl priority data frame 1, the propyl priority data frame 2, and the propyl priority data frame 3 are bit sequences F and G, which represent propyl priority, when one propyl priority data frame is transmitted, the bit sequence F is used as a priority field of all data blocks in the data frame, when the next propyl priority data frame is transmitted, the bit sequence G is used as a priority field of all data blocks in the data frame, and the bit sequences F and G are alternately used to transmit adjacent propyl priority data frames.
After the transmission of the second priority data frame 1 is started, when the 2 nd second priority data block of the second priority data frame 1 is transmitted, the third priority data frame 1 applies for transmission, and as the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 1 is not transmitted, and the data block of the third priority data frame 1 is started to be transmitted; after all the data blocks of the third priority data frame 1 are transmitted, the remaining data blocks of the second priority data frame 1 can be continuously transmitted.
After the transmission of the second priority data frame 1 is finished, the second priority data frame 2 is transmitted, after the transmission of the second priority data frame 2 is finished, the second priority data frame 3 is transmitted, when the 1 st second priority data block of the second priority data frame 3 is transmitted, the third priority data frame 2 applies for transmission, and because the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 3 is not transmitted any more, and the data block of the third priority data frame 2 is transmitted; after all the data blocks of the third priority data frame 2 are sent, the 2 nd second priority data block of the second priority data frame 3 can be sent continuously.
When the 2 nd second priority data block of the second priority data frame 3 is transmitted, the third priority data frame 3 applies for transmission, and the third priority data frame is higher than the second priority data frame, so that after the transmission of the second priority data block currently being transmitted is completed, the next data block of the second priority data frame 3 is not transmitted, and the data block of the third priority data frame 3 is started to be transmitted; after all the data blocks of the third priority data frame 3 are transmitted, the remaining data blocks of the second priority data frame 3 can be continuously transmitted.
As shown in fig. 9, the invalid data block is transmitted at a preset time slice when there is no data frame.
In the present invention, the data blocks with the priority field PR being the bit sequence C or D are other priority data blocks, and in the embodiments shown in fig. 10 and 11, the other priority refers to the b priority and the C priority, the other priority data frame refers to the b priority data frame and the C priority data frame, the other priority data block refers to the b priority data block and the C priority data block, and the priorities of the a priority, the b priority, and the C priority are different from each other.
In the embodiment shown in fig. 10 and 11, the bit sequence C is replaced by 2 mutually different bit sequences E, F, so that the data blocks with the priority fields PR being the bit sequences E, F or D are other priority data blocks, i.e. the data blocks with the priority fields PR being the bit sequences E, F or D are the b priority data block and the C priority data block, and the bit sequences A, B, D, E, F, I are mutually different.
In the present invention, the bit sequence E, F can be binary sequences "11000", "11001", respectively.
In the present invention, E, F may be other bit sequences different from each other.
As shown in fig. 10, an embodiment of transmitting the b priority data frame and the c priority data frame simultaneously is shown, in the embodiment shown in fig. 10, the c priority is higher than the b priority, and in other embodiments (not shown in the present invention), the c priority may be lower than the b priority.
As shown in fig. 10, PR fields of data blocks of the b priority data frame 1, the b priority data frame 2, the b priority data frame 3, and the b priority data frame 4 are bit sequences E and D, which represent the b priority, and when each b priority data frame is transmitted, the bit sequence E is used as the priority field of the 1 st data block in the data frame, and the bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame.
As shown in fig. 10, the data frame with the propyl priority only contains one data block, and the PR fields of the data blocks of the propyl priority data frame 1, the propyl priority data frame 2, the propyl priority data frame 3 and the propyl priority data frame 4 are bit sequences F, so that when one data frame with the propyl priority is transmitted, the bit sequences F are used as the priority fields of the unique data blocks in the data frame.
After the transmission of the second priority data frame 1 is started, when the 2 nd second priority data block of the second priority data frame 1 is transmitted, the third priority data frame 1 applies for transmission, and as the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 1 is not transmitted, and the unique data block of the third priority data frame 1 is started to be transmitted; when transmitting the unique data block of the third priority data frame 1, the third priority data frame 2 applies for transmission, and when the unique data block of the third priority data frame 1 is transmitted, the unique data block of the third priority data frame 2 is started to be transmitted; after the transmission of the unique data block of the third priority data frame 2 is completed, the remaining data blocks of the second priority data frame 1 can be continuously transmitted.
After the transmission of the second priority data frame 1 is finished, the second priority data frame 2 is transmitted, after the transmission of the second priority data frame 2 is finished, the second priority data frame 3 is transmitted, when the 1 st second priority data block of the second priority data frame 3 is transmitted, the third priority data frame 3 applies for transmission, and because the priority of the third priority data frame is higher than that of the second priority data frame, after the transmission of the second priority data block which is currently being transmitted is finished, the next data block of the second priority data frame 3 is not transmitted any more, and the unique data block of the third priority data frame 3 is transmitted; and after the transmission of the unique data block of the third priority data frame 3 is finished, the remaining data blocks of the second priority data frame 3 can be continuously transmitted.
When the last B priority data block of the B priority data frame 3 is transmitted, the B priority data frame 4 and the C priority data frame 4 simultaneously apply for transmission, and the priority of the C priority data frame is higher than that of the B priority data frame, so that after the last B priority data block of the B priority data frame 3 which is currently being transmitted is transmitted, the unique data block of the C priority data frame 4 starts to be transmitted; and after the transmission of the unique data block of the third priority data frame 4 is finished, the data block of the second priority data frame 4 can be transmitted.
As shown in fig. 10, an invalid data block is transmitted at a preset time slice when there is no data frame.
As shown in fig. 11, in the embodiment shown in fig. 11, the priority of the priority data frame is higher than the priority of the priority data frame, and in other embodiments (not shown in the present invention), the priority relationship among the priority of the priority data frame, and the priority of the priority data frame may be in other order.
As shown in fig. 11, the method shown in fig. 4 is used for the bit sequences a and B to indicate the first priority data frame 1, the first priority data frame 2, and the first priority data frame 3, the bit sequences E and D to indicate the second priority data frame 1, and the second priority data frame 2 are used for the method shown in fig. 10, the third priority data frame only contains one data block, and the bit sequence F to indicate the third priority data frame 1, the third priority data frame 2, the third priority data frame 3, and the third priority data frame 4 are used for the method shown in fig. 10.
After the transmission of the second priority data frame 1 is started, when the 1 st second priority data block of the second priority data frame 1 is transmitted, the first priority data frame 1 applies for transmission, and the priority of the first priority data frame is higher than that of the second priority data frame, so that after the transmission of the currently transmitted second priority data block is finished, the next data block of the second priority data frame 1 is not transmitted, and the transmission of the data block of the first priority data frame 1 is started; when transmitting the 1 st first priority data block of the first priority data frame 1, the third priority data frame 1 applies for transmission, and the priority of the third priority data frame is higher than that of the first priority data frame, so that after the transmission of the first priority data block which is currently being transmitted is finished, the next data block of the first priority data frame 1 is not transmitted, and the transmission of the unique data block of the third priority data frame 1 is started; after the transmission of the unique data block of the third priority data frame 1 is finished, the rest data blocks of the first priority data frame 1 can be continuously transmitted; after all the data blocks of the first priority data frame 1 are transmitted, the 2 nd second priority data block of the second priority data frame 1 can be continuously transmitted.
When the 2 nd second priority data block of the second priority data frame 1 is transmitted, the first priority data frame 2 applies for transmission, and the priority of the first priority data frame is higher than that of the second priority data frame, so that after the transmission of the currently transmitted second priority data block is finished, the next data block of the second priority data frame 1 is not transmitted, and the data block of the first priority data frame 2 is started to be transmitted; when the 2 nd first priority data block of the first priority data frame 2 is transmitted, the third priority data frame 2 applies for transmission, and the priority of the third priority data frame is higher than that of the first priority data frame, so that after the transmission of the first priority data block which is currently being transmitted is finished, the next data block of the first priority data frame 2 is not transmitted, and the transmission of the unique data block of the third priority data frame 2 is started; after the transmission of the unique data block of the third priority data frame 2 is finished, the rest data blocks of the first priority data frame 2 can be continuously transmitted; after all the data blocks of the first priority data frame 2 are transmitted, the remaining data blocks of the second priority data frame 1 can be continuously transmitted.
After the transmission of the second priority data frame 1 is finished, the second priority data frame 2 is transmitted, when the 2 nd second priority data block of the second priority data frame 2 is transmitted, the third priority data frame 3 applies for transmission, and as the priority of the third priority data frame is higher than that of the second priority data frame, the next data block of the second priority data frame 2 is not transmitted after the transmission of the current second priority data block is finished, and the unique data block of the third priority data frame 3 is started to be transmitted; after the transmission of the unique data block of the third priority data frame 3 is completed, the remaining data blocks of the second priority data frame 2 can be continuously transmitted.
When the last second priority data block of the second priority data frame 2 is transmitted, the first priority data frame 3 and the third priority data frame 4 simultaneously apply for transmission, and the third priority data frame is higher than the first priority data frame in priority, so that after the last second priority data block of the second priority data frame 2 which is currently being transmitted is transmitted, the unique data block of the third priority data frame 4 starts to be transmitted; after the transmission of the unique data block of the third priority data frame 4 is completed, the data block of the first priority data frame 3 can be transmitted.
As shown in fig. 11, an invalid data block is transmitted at a preset time slice when there is no data frame.
When the number of different priorities of the data frames is greater than 3, the other priorities refer to the priorities P2, P3 to Pn, n is an integer greater than 3, the priorities a, P2, P3 to Pn are different from each other, the other priority data frames refer to the data frames P2, P3 to Pn, and the other priority data blocks refer to the data blocks P2, P3 to Pn.
The priority field PR representing other priorities in the present invention is a bit sequence C or D, and when the number of different priorities of the data frames is greater than 3, the bit sequence C is replaced by a corresponding plurality of bit sequences, and is used together with D to represent the priorities of P2, P3 to Pn, the bit sequences of these replaced bit sequences C are different from each other, and the bit sequences of these replaced bit sequences C are also different from the bit sequences A, B, D, I.
In the transmission process of one data frame, the data frame with higher priority is allowed to be inserted, and the data frame with equal or lower priority is not allowed to be inserted.
The above description is only of the preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (18)
1. A method of transmitting multi-priority data frames for transmitting data frames over a transmission system comprising a first transmission terminal, a second transmission terminal, a transmission channel, the first transmission terminal transmitting data frames to the second transmission terminal over the transmission channel,
the method is characterized in that:
the data frame is divided into one or more data blocks for transmission in a predetermined time slice,
the data blocks are divided into a first priority data block, other priority data blocks and invalid data blocks,
the data frames are divided into a first priority data frame and other priority data frames,
the a-priority data frame is divided into one or more a-priority data block transmissions,
the other priority data frames are divided into one or more other priority data block transmissions,
in the absence of a priority data frame and other priority data frames, invalid data blocks are transmitted during a preset time slice,
the data block includes a priority field, which is alternatively a mutually different bit sequence A, B, C, D, I,
the data block with the priority field being bit sequence a or B is a priority data block,
the data blocks with the priority field being bit sequences C or D are other priority data blocks,
The data block with the priority field being bit sequence I is an invalid data block,
the priority field identifies the boundary of the data frame to which the data block belongs.
2. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the data blocks are the same length.
3. A method of transmitting multi-priority data frames in accordance with claim 2 wherein:
the data block is 66 bits or 34 bits in length.
4. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the bit sequences a and B are 2 bits in length.
5. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the bit sequence D has a length of 2 bits.
6. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
during the transmission of one of the data blocks no other data is allowed to be inserted.
7. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the method for identifying the boundary of the data frame to which the data block belongs by the priority field is that when each first priority data frame is transmitted, a bit sequence A is used as the priority field of the 1 st data block in the data frame, and a bit sequence B is used as the priority field of other data blocks except the 1 st data block in the data frame.
8. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the method for identifying the boundary of the data frame to which the data block belongs by the priority field is that when one A priority data frame is transmitted, a bit sequence A is used as the priority field of all the data blocks in the data frame, when the next A priority data frame is transmitted, a bit sequence B is used as the priority field of all the data blocks in the data frame,
the bit sequences a and B alternate with transmitting adjacent a-priority data frames.
9. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the other priority refers to the second priority which is different from the first priority, the other priority data frame refers to the second priority data frame, the other priority data block refers to the second priority data block,
during the transmission of one data frame, higher priority data frames are allowed to be inserted,
during the transmission of a data frame, the insertion of data frames of equal or lower priority is not allowed.
10. A method of transmitting multi-priority data frames as recited in claim 9 wherein:
When each b priority data frame is transmitted, bit sequence C is used as the priority field of the 1 st data block in the data frame, and bit sequence D is used as the priority field of the other data blocks except the 1 st data block in the data frame.
11. A method of transmitting multi-priority data frames as recited in claim 9 wherein:
when transmitting one b-priority data frame, bit sequence C is used as the priority field of all data blocks in the data frame, when transmitting the next b-priority data frame, bit sequence D is used as the priority field of all data blocks in the data frame,
the bit sequence C and the bit sequence D alternately use transmission of adjacent b priority data frames.
12. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the other priority refers to the second priority and the third priority, the other priority data frames refer to the second priority data frame and the third priority data frame, the other priority data blocks refer to the second priority data block and the third priority data block,
the priority of the first priority, the second priority and the third priority are different from each other,
During the transmission of one data frame, higher priority data frames are allowed to be inserted,
during the transmission of a data frame, the insertion of data frames of equal or lower priority is not allowed.
13. A method of transmitting multi-priority data frames as recited in claim 12 wherein:
the bit sequence C is replaced by 3 mutually different bit sequences E, F, G, the bit sequences A, B, D, E, F, G, I mutually different,
when each b priority data frame is transmitted, bit sequence E is used as the priority field of the 1 st data block in the data frame, bit sequence D is used as the priority field of the other data blocks in the data frame except for the 1 st data block,
when each of the c priority data frames is transmitted, bit sequence F is used as the priority field of the 1 st data block in the data frame, and bit sequence G is used as the priority field of the other data blocks except the 1 st data block in the data frame.
14. A method of transmitting multi-priority data frames as recited in claim 12 wherein:
the bit sequence C is replaced by 3 mutually different bit sequences E, F, G, the bit sequences A, B, D, E, F, G, I mutually different,
When each b priority data frame is transmitted, bit sequence E is used as the priority field of the 1 st data block in the data frame, bit sequence D is used as the priority field of the other data blocks in the data frame except for the 1 st data block,
when transmitting one propyl priority data frame, bit sequence F is used as the priority field of all data blocks in the data frame, when transmitting the next propyl priority data frame, bit sequence G is used as the priority field of all data blocks in the data frame,
the bit sequence F and the bit sequence G alternately use transmission of adjacent c-priority data frames.
15. A method of transmitting multi-priority data frames as recited in claim 12 wherein:
the bit sequence C is replaced by 2 mutually different bit sequences E, F, the bit sequences A, B, D, E, F, I mutually different,
when each b priority data frame is transmitted, bit sequence E is used as the priority field of the 1 st data block in the data frame, bit sequence D is used as the priority field of the other data blocks in the data frame except for the 1 st data block,
the data frame of the c priority contains only one data block,
When transmitting each c-priority data frame, the bit sequence F is used as the priority field of the unique data block in the data frame, respectively.
16. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the other priority refers to the priority of P2, P3 to Pn, n is an integer larger than 3, the other priority data frames refer to the priority data frames of P2, P3 to Pn, the other priority data blocks refer to the priority data blocks of P2, P3 to Pn,
the priorities of the A priority, P2, P3 to Pn priority are different from each other,
during the transmission of one data frame, higher priority data frames are allowed to be inserted,
during the transmission of a data frame, the insertion of data frames of equal or lower priority is not allowed.
17. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the preset time slice is a preset fixed time slice.
18. A method of transmitting multi-priority data frames as claimed in claim 1 wherein:
the preset time slices are preset set time slices.
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| CN202210300562.2A CN114866185B (en) | 2022-03-25 | 2022-03-25 | Method for transmitting multi-priority data frame |
| PCT/CN2023/073805 WO2023179198A1 (en) | 2022-03-25 | 2023-01-30 | Method for transmitting multi-priority data frame |
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| CN202210300562.2A CN114866185B (en) | 2022-03-25 | 2022-03-25 | Method for transmitting multi-priority data frame |
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| CN114866185A (en) | 2022-08-05 |
| WO2023179198A1 (en) | 2023-09-28 |
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