CN113014547A - Sequencing mapping-based direct data transmission system and method - Google Patents
Sequencing mapping-based direct data transmission system and method Download PDFInfo
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Abstract
The invention discloses a through data transmission system and method based on sequencing mapping, which can send data preferentially by utilizing through transmission, have the advantages of low delay and no waiting, and quickly process and send the data. The invention adopts message sequencing and check calculation, makes each message independent, is easy for data message identification, gives out correct response sequence, and greatly improves the reliability of data. The invention adopts a sorting mapping cache method, can accurately and visually associate the data message with the physical storage space, and can independently express the serial number on the address of the physical storage. The invention adopts an efficient response mechanism and adopts an interval response and data non-waiting transmission method, thereby realizing the high efficiency of data transmission and greatly reducing the response waiting time and the occupation time of the response on a physical link.
Description
Technical Field
The invention belongs to the technical field of digital communication, and particularly relates to a direct data transmission system and method based on sequencing mapping.
Background
In the data transmission process, due to the instability of the link and the superposition of noise, there are always data transmission errors and losses on the link, and in order to increase the reliability of the system and the integrity and stability of data transmission, a method of response waiting is generally used to ensure that the data is complete and reliable. At present, most of response mechanisms wait for a response message, a host is in a waiting state and does not send data, so that the bandwidth of a physical link is greatly wasted; in addition, some technologies respond to a single data message when responding, a lot of response information can be transmitted on a link, the response message greatly occupies a transmission channel, and the transmission efficiency of effective data is reduced. With the wide application of high-speed transmission systems, the traditional answering mechanism has greater and greater limitations.
Disclosure of Invention
Aiming at the defects in the prior art, the through data transmission system and method based on the sequencing mapping provided by the invention solve the problems in the prior art.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a sort mapping-based straight-through data transmission system comprises a straight-through transmission module, a message sorting module, a check calculation module, a high-efficiency response module, a sort mapping storage module, an overtime detection module and a sending and receiving module;
the direct transmission module, the message sorting module, the check calculation module, the efficient response module, the overtime detection module and the sending and receiving module are sequentially connected, the check calculation module is respectively connected with the overtime detection module, the sorting mapping storage module and the sending and receiving module, and the sorting mapping storage module is connected with the message sorting module.
Furthermore, the direct connection transmission module is used for receiving the data messages transmitted by the previous stage and sequentially sending the received data messages to the message sequencing module without waiting for all the data messages of the previous stage to be received; the message sequencing module is used for sequencing the received data messages in sequence and transmitting the data messages to the checking calculation module and the sequencing mapping storage module; the sorting mapping storage module is used for associating the data message with the physical space address of the storage space according to the sequence number field; the check computation module is used for selecting data to be output from physical space addresses of the storage space according to the serial number of the data message and transmitting the data to the high-efficiency response module; the efficient response module is used for sequentially and continuously transmitting the selected message data to the overtime detection module before the response message of the next stage is not overtime; the overtime detection module is used for detecting whether the response message of the next stage is overtime or not and transmitting a retransmission signal to the check calculation module after the response message of the next stage is overtime; the sending and receiving module is used for transmitting the data message to the next stage, receiving the response message and transmitting the response serial number of the corresponding message to the checking and calculating module for retransmission after timeout.
The invention has the beneficial effects that: the form of direct transmission is adopted, and the efficient response module is arranged, so that the data transmission efficiency is improved. And the response message is detected by using the overtime detection module, so that the reliability of data transmission is ensured.
A through data transmission method based on sequencing mapping comprises the following steps:
s1, receiving the data message sent by the upper stage, and transmitting the data message by using a direct transmission method;
s2, sequencing the received data messages, and adding a sequence number field to each data message, wherein the sequence number field of each data message is added by 1 compared with the sequence number field of the previous data message;
s3, storing the data message into the corresponding storage space by using a sorting mapping cache method according to the sorted sequence number field, and associating the sequence number field with the physical space address of the storage space;
s4, selecting output data, carrying out check calculation, and adding a check field at the tail of the data message;
s5, sending the data message added with the check field to the next level by using an efficient response mechanism;
s6, detecting whether a response message of next-stage transmission is returned within a specified time, if so, finishing data transmission, otherwise, resending the message, and entering the step S7;
s7, judging whether the number of times of resending the message reaches the set value, if so, generating corresponding error information and reporting to the previous stage to finish the data transmission, otherwise, returning to the step S4 to resend the data message.
Further, the pass-through transmission method in step S1 specifically includes: and receiving the data message of the previous stage, and immediately sending the data message to the next stage without waiting for the data message of the previous stage to be completely received.
Further, the step S2 is specifically:
s2.1, adding n-bit message sequence number fields in each data message;
s2.2, setting the message sequence number field of the first received data message to be 0;
and S2.3, adding 1 to the sequence number field corresponding to each data message except the first data message compared with the sequence number field of the previous data message to finish the addition of the sequence number field of the data message.
Further, the high effect response mechanism in step S5 includes a transmission mechanism and a response mechanism.
Further, the transmission mechanism is specifically: when the message data is sent, if the response timeout of the next stage does not exist, the data message is sent in sequence according to the sequence number field without waiting for the response signal to return.
Further, the response mechanism is specifically: and acquiring interval responses, and returning 1 response message to the next stage for every N sent data messages.
Further, the step S6 is specifically:
s6.1, timing is started after N data messages are sent every time;
s6.2, judging whether a response message of the Nth data message is returned within the specified time, if so, finishing data transmission, otherwise, retransmitting the previous N data messages, and entering the step S7;
the invention has the beneficial effects that:
(1) the invention uses the direct transmission method, can send the data preferentially, has the advantages of low delay and no waiting, and can quickly process and send the data.
(2) The invention adopts the methods of message sequencing and check calculation, makes each message independent, is easy for data message identification, gives out correct response sequence and greatly improves the reliability of data.
(3) The invention adopts a sorting mapping cache method, can accurately and visually associate the data message with the physical storage space, and can independently express the serial number on the address of the physical storage.
(3) The invention adopts an efficient response mechanism and adopts an interval response and data non-waiting transmission method, thereby realizing the high efficiency of data transmission and greatly reducing the response waiting time and the occupation time of the response on a physical link.
Drawings
Fig. 1 is a schematic diagram of a through data transmission system based on a sequence mapping according to the present invention.
Fig. 2 is a flowchart of a through data transmission method based on ordered mapping according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a cut-through data transmission system based on sorting mapping includes a cut-through transmission module, a message sorting module, a check computation module, an efficient response module, a sorting mapping storage module, an overtime detection module, and a sending and receiving module.
The direct transmission module, the message sorting module, the check calculation module, the efficient response module, the overtime detection module and the sending and receiving module are sequentially connected, the check calculation module is respectively connected with the overtime detection module, the sorting mapping storage module and the sending and receiving module, and the sorting mapping storage module is connected with the message sorting module.
In this embodiment, all the modules and functions are implemented by using a programmable logic device, and first, a data packet is received from an upper layer, and the processing time delay of the data packet is reduced by using direct transmission; then all messages are sequenced, sequence fields are added, and the sequence fields are mapped into a storage space. And carrying out check calculation on the data to be sent, adding a check value, and finally sending the data by using an efficient response mechanism with intermittent response and no waiting transmission, thereby realizing a reliable and stable data transmission system.
The direct transmission module is used for receiving the data messages transmitted by the previous stage and sequentially sending the received data messages to the message sequencing module without waiting for all the data messages of the previous stage to be received.
The message sequencing module is used for sequencing the received data messages in sequence and transmitting the data messages to the checking calculation module and the sequencing mapping storage module.
The sorting mapping storage module is used for associating the data message with the physical space address of the storage space according to the sequence number field.
And the check calculation module is used for selecting data to be output from the physical space addresses of the storage space according to the data message serial number and transmitting the data to the high-efficiency response module.
The high-efficiency response module is used for sequentially and continuously transmitting the selected message data to the overtime detection module before the response message of the next stage is not overtime.
The overtime detection module is used for detecting whether the response message of the next stage is overtime or not and transmitting a retransmission signal to the check calculation module after the overtime.
The sending and receiving module is used for transmitting the data message to the next stage, receiving the response message and transmitting the response serial number of the corresponding message to the checking and calculating module for retransmission after timeout.
The invention has the beneficial effects that: the form of direct transmission is adopted, and the efficient response module is arranged, so that the data transmission efficiency is improved. And the response message is detected by using the overtime detection module, so that the reliability of data transmission is ensured.
As shown in fig. 2, a cut-through data transmission method based on sorting mapping includes the following steps:
s1, receiving the data message sent by the upper stage, and transmitting the data message by using a direct transmission method;
s2, sequencing the received data messages, and adding a sequence number field to each data message, wherein the sequence number field of each data message is added by 1 compared with the sequence number field of the previous data message;
s3, storing the data message into the corresponding storage space by using a sorting mapping cache method according to the sorted sequence number field, and associating the sequence number field with the physical space address of the storage space;
s4, selecting output data, carrying out check calculation, and adding a check field at the tail of the data message;
s5, sending the data message added with the check field to the next level by using an efficient response mechanism;
s6, detecting whether a response message of next-stage transmission is returned within a specified time, if so, finishing data transmission, otherwise, resending the message, and entering the step S7;
s7, judging whether the number of times of resending the message reaches the set value, if so, generating corresponding error information and reporting to the previous stage to finish the data transmission, otherwise, returning to the step S4 to resend the data message.
In this embodiment, the specific method of the verification calculation is as follows: and selecting output data, performing CRC8 check calculation on the data and the sequence number, and adding a check value to the tail of the data message. The checking calculation specifically has the following functions: and by adding verification, the reliability of data transmission can be ensured. When signals are transmitted in a channel, various interferences may exist, so that errors occur in data transmission, and the data messages with errors can be effectively filtered by adding verification.
The through transmission method in step S1 specifically includes: and receiving the data message of the previous stage, and immediately sending the data message to the next stage without waiting for the data message of the previous stage to be completely received.
The step S2 specifically includes:
s2.1, adding n-bit message sequence number fields in each data message;
s2.2, setting the message sequence number field of the first received data message to be 0;
and S2.3, adding 1 to the sequence number field corresponding to each data message except the first data message compared with the sequence number field of the previous data message to finish the addition of the sequence number field of the data message.
The high effect response mechanism in step S5 includes a transmission mechanism and a response mechanism.
The transmission mechanism is specifically as follows: when the message data is sent, if the response timeout of the next stage does not exist, the data message is sent in sequence according to the sequence number field without waiting for the response signal to return.
The response mechanism is specifically as follows: and acquiring interval responses, and returning 1 response message to the next stage for every N sent data messages.
The step S6 specifically includes:
s6.1, timing is started after N data messages are sent every time;
s6.2, judging whether a response message of the Nth data message is returned within the specified time, if so, finishing data transmission, otherwise, retransmitting the previous N data messages, and entering the step S7;
the invention has the beneficial effects that:
(1) the invention uses the direct transmission method, can send the data preferentially, has the advantages of low delay and no waiting, and can quickly process and send the data.
(2) The invention adopts the methods of message sequencing and check calculation, makes each message independent, is easy for data message identification, gives out correct response sequence and greatly improves the reliability of data.
(3) The invention adopts a sorting mapping cache method, can accurately and visually associate the data message with the physical storage space, and can independently express the serial number on the address of the physical storage.
(3) The invention adopts an efficient response mechanism and adopts an interval response and data non-waiting transmission method, thereby realizing the high efficiency of data transmission and greatly reducing the response waiting time and the occupation time of the response on a physical link.
The direct transmission specifically comprises: a complete data packet input may be transmitted in several clock cycles, and in the through transmission, as long as the data packet of the first clock cycle is received, the subsequent operations of packet sequencing, check calculation and the like are started, and then the input data packet is sent. The operation is started without waiting for the completion of the reception of all message fields, so that the message processing and waiting time is reduced, and the processing timeliness of the data message is greatly improved.
If the data message is found to be wrong or invalid in the transmission process, a wrong check value can be added at the tail part through check calculation, so that the receiving party discards the message.
The message sequencing specifically comprises the following steps: adding n-bit message sequence number fields into each data message, defaulting the message sequence number fields to be 0, performing plus 1 operation according to the sequence of received messages, and turning the message sequence number fields to be 0 after the plus is completed. If the field of the currently received message sequence number is smaller than M, the receiver considers that the data are repeatedly sent and returns a response sequence number M at the same time according to the response sequence number (M) returned last time; otherwise, returning the currently received message sequence number field. By sequencing and counting all the messages and marking a unique label on each data message, whether the data message transmission is complete or not can be effectively identified.
The sorting mapping storage specifically comprises: and the serial number of the response is corresponding to the sent data message. The n-bit message sequence number field obtained by sorting the messages is used for mapping to different physical storage spaces. The n-bit message serial number is used as the address of the storage space, and each storage space stores the data message field corresponding to the address. By the sequencing mapping storage method, the sent data message can be selected from the storage space by directly using the sequence number field of the message, the sent data message can be quickly searched, and the sequencing mapping storage method has the advantages of simple structure, quickness and intuition.
The efficient response mechanism is specifically as follows: by using the interval response method and the wait-free transmission mechanism, the data message can be transmitted efficiently, the response waiting time is eliminated, and the occupied time of the response message on a channel is reduced.
The interval response method only returns one response message to a plurality of data messages. For example, in actual use, after 8 data packets may be sent, the receiving party returns a response packet, where the response packet includes the sequence number field of the 8 th data packet. After receiving the response message, the sender knows that the receiver has correctly received the previous data message.
In the detection of the response message, a timeout detection method is used, when the sender sends 8 data messages, the timeout timing is started, and when the timing reaches a specific time, if the receiver does not return a correct response sequence, the sender starts to retransmit the previous sequence.
The sending non-waiting method is characterized in that when the response returned by the receiving party is not time-out, the sending party can continuously send the data message without waiting for the response sequence to arrive and then starts to send the data. The latency to reply during transmission is reduced.
The sending and receiving module corresponds to different kinds of signals and uses different sending and receiving methods to receive and simulate the signals. Has strong compatibility.
Claims (9)
1. A through data transmission system based on sequencing mapping is characterized by comprising a through transmission module, a message sequencing module, a check calculation module, an efficient response module, a sequencing mapping storage module, an overtime detection module and a sending and receiving module;
the direct transmission module, the message sorting module, the check calculation module, the efficient response module, the overtime detection module and the sending and receiving module are sequentially connected, the check calculation module is respectively connected with the overtime detection module, the sorting mapping storage module and the sending and receiving module, and the sorting mapping storage module is connected with the message sorting module.
2. The direct data transmission system based on sorting mapping according to claim 1, wherein the direct transmission module is configured to receive the data packets transmitted from the previous stage, and sequentially send the received data packets to the packet sorting module without waiting for all the data packets from the previous stage to be received; the message sequencing module is used for sequencing the received data messages in sequence and transmitting the data messages to the checking calculation module and the sequencing mapping storage module; the sorting mapping storage module is used for associating the data message with the physical space address of the storage space according to the sequence number field; the check computation module is used for selecting data to be output from physical space addresses of the storage space according to the serial number of the data message and transmitting the data to the high-efficiency response module; the efficient response module is used for sequentially and continuously transmitting the selected message data to the overtime detection module before the response message of the next stage is not overtime; the overtime detection module is used for detecting whether the response message of the next stage is overtime or not and transmitting a retransmission signal to the check calculation module after the response message of the next stage is overtime; the sending and receiving module is used for transmitting the data message to the next stage, receiving the response message and transmitting the response serial number of the corresponding message to the checking and calculating module for retransmission after timeout.
3. A through data transmission method based on sequencing mapping is characterized by comprising the following steps:
s1, receiving the data message sent by the upper stage, and transmitting the data message by using a direct transmission method;
s2, sequencing the received data messages, and adding a sequence number field to each data message, wherein the sequence number field of each data message is added by 1 compared with the sequence number field of the previous data message;
s3, storing the data message into the corresponding storage space by using a sorting mapping cache method according to the sorted sequence number field, and associating the sequence number field with the physical space address of the storage space;
s4, selecting output data, carrying out check calculation, and adding a check field at the tail of the data message;
s5, sending the data message added with the check field to the next level by using an efficient response mechanism;
s6, detecting whether a response message of next-stage transmission is returned within a specified time, if so, finishing data transmission, otherwise, resending the message, and entering the step S7;
s7, judging whether the number of times of resending the message reaches the set value, if so, generating corresponding error information and reporting to the previous stage to finish the data transmission, otherwise, returning to the step S4 to resend the data message.
4. The cut-through data transmission method based on the sorting mapping according to claim 3, wherein the cut-through transmission method in step S1 specifically is: and receiving the data message of the previous stage, and immediately sending the data message to the next stage without waiting for the data message of the previous stage to be completely received.
5. The method for through data transmission based on the ordered mapping as claimed in claim 4, wherein the step S2 specifically comprises:
s2.1, adding n-bit message sequence number fields in each data message;
s2.2, setting the message sequence number field of the first received data message to be 0;
and S2.3, adding 1 to the sequence number field corresponding to each data message except the first data message compared with the sequence number field of the previous data message to finish the addition of the sequence number field of the data message.
6. The sequenced mapping based pass-through data transmission method according to claim 5, wherein the high effect response mechanism in step S5 comprises a transmission mechanism and a response mechanism.
7. The sequenced mapping-based pass-through data transmission method according to claim 6, wherein the transmission mechanism is specifically: when the message data is sent, if the response timeout of the next stage does not exist, the data message is sent in sequence according to the sequence number field without waiting for the response signal to return.
8. The cut-through data transmission method based on the ordered mapping as claimed in claim 7, wherein the response mechanism is specifically: and acquiring interval responses, and returning 1 response message to the next stage for every N sent data messages.
9. The method for through data transmission based on the ordered mapping as claimed in claim 8, wherein the step S6 specifically comprises:
s6.1, timing is started after N data messages are sent every time;
s6.2, judging whether a response message of the Nth data message is returned within the specified time, if so, finishing data transmission, otherwise, retransmitting the previous N data messages, and entering the step S7.
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