CN106130858B - Data transmission method Internet-based, apparatus and system - Google Patents

Abstract

The invention discloses a kind of data transmission methods Internet-based, apparatus and system, this programme is suitable for two-wire system data transmission network, the described method includes: host node receives the timeslice acquisition request sent from node, it include the data volume of data to be transmitted in the timeslice acquisition request；According to the data volume of the data to be transmitted and unappropriated timeslice, timeslice is distributed for the data to be transmitted, timeslice is obtained and distributes information；Timeslice distribution information is sent to and described sends the data to be transmitted so that described distribute information according to the timeslice from node from node.In the present invention program, host node is according to the timeslice acquisition request from node, to distribute timeslice from node, so as to can send data to be transmitted according to the timeslice distributed for itself from node.In this way, without being category 5 twisted pair network by the network rebuilding, while data are transmitted from node according to timeslice, it can also guarantee the time determinability of data transmission.

Description

Internet-based data transmission method, device and system

technical field

The present invention relates to the technical field of data transmission, and in particular, to an Internet-based data transmission method, device and system.

Background technique

In the field of industrial control, with the development of Ethernet communication technology, it gradually replaces the traditional industrial field bus technology to transmit industrial control data.

In the existing industrial control field, CSMA/CD (Carrier Sense Multiple Access with Collision Detection, carrier sense multiple access technology with collision detection) is mostly used to transmit data. Specifically, this technology requires each node to monitor whether the channel is idle before sending data, and if it is idle, send data immediately; otherwise, wait for a period of time until the channel is idle before sending data. If two or more nodes simultaneously submit sending requests after the last piece of information is sent, it is determined as a conflict. If a conflict is detected, it immediately stops sending data, waits for a random period of time, and then tries again.

Due to the use of CSMA/CD technology, any node must perform conflict detection when sending data. If a conflict is detected, it cannot send data, and it needs to wait for a period of time. The length of this waiting time is uncertain, so CSMA /CD technology has the uncertainty of sending time of sending data. Especially when the network load is heavy, this kind of uncertainty is difficult to apply to the requirement of deterministic transmission time of data transmission in industrial control.

In addition, bus transmission technologies (such as PROFIBUS (Process Field Bus, process field bus), Modbus (Modbus protocol, Modbus communication protocol), can (Controller Area Network, controller area network), etc.) are mostly used in traditional industrial control to transmit data. The bus transmission technology mostly uses a two-wire network structure, while Ethernet usually uses Category 5 twisted pair to transmit data. In order to transmit data through CSMA/CD technology, it is necessary to transform the two-wire network structure into Category 5 twisted pair that meets the Ethernet network structure, which is time-consuming and labor-intensive.

Therefore, a new industrial data transmission method is required, which can not only transform the two-wire network into a Category 5 twisted pair network, but also ensure the time determinism of data transmission.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide an Internet-based data transmission method, device, and system, to solve the problem that in order to use the Ethernet communication technology, it is necessary to transform a two-wire network into a Category 5 twisted pair Ethernet, and the existing The modified Ethernet in the technology adopts CSMA/CD technology, which has the uncertainty of data transmission time. When the network is under heavy load, it cannot meet the problem of the certainty of the transmission time of data transmission in industrial control.

The embodiment of the present invention provides an Internet-based data transmission method, which is applicable to a two-wire data transmission network, including:

The master node receives a time slice acquisition request sent by the slave node, where the time slice acquisition request includes the amount of data to be transmitted;

According to the data amount of the data to be transmitted and the unallocated time slice, allocate a time slice for the data to be transmitted, and obtain time slice allocation information;

Sending the time slice allocation information to the slave node, so that the slave node sends the data to be transmitted according to the time slice allocation information.

Further, an embodiment of the present invention also provides an Internet-based data transmission method, which is applicable to a two-wire data transmission network, and the method includes:

The slave node sends the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted;

Receive the time slice allocation information sent by the master node; the time slice allocation information is that after the master node receives the time slice acquisition request, according to the data amount of the data to be transmitted and the unallocated time slice, the time slice is the time slice to be transmitted. Obtained after data allocation time slice;

The data to be transmitted is sent according to the time slice allocation information.

Further, the present invention also provides an Internet-based data transmission device suitable for a two-wire data transmission network, the device comprising:

a time slice acquisition request receiving module, configured to receive a time slice acquisition request sent from a node, where the time slice acquisition request includes the amount of data to be transmitted;

a time slice allocation module, configured to allocate time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slices, and obtain time slice allocation information;

A time slice allocation information sending module, configured to send the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information.

Further, the present invention also provides an Internet-based data transmission device suitable for a two-wire data transmission network, the device comprising:

a time slice acquisition request sending module, configured to send the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted;

The time slice allocation information receiving module is used to receive the time slice allocation information sent by the master node; the time slice distribution information is that after the master node receives the time slice acquisition request, according to the data amount of the to-be-transmitted data and the future The allocated time slice is obtained after the data to be transmitted is allocated a time slice;

A data transmission module, configured to send the data to be transmitted according to the time slice allocation information.

Further, the present invention also provides an Internet-based data transmission system suitable for a two-wire data transmission network, the system comprising:

The master node is used to receive a time slice acquisition request sent by a slave node, where the time slice acquisition request includes the amount of data to be transmitted; according to the amount of data to be transmitted and the unallocated time slice, the Allocating time slices for transmission data to obtain time slice allocation information; sending the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information;

The slave node is used to send the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted; the time slice allocation information sent by the master node is received; the time slice allocation information is the After the master node receives the time slice acquisition request, it is obtained after allocating time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slice; according to the time slice allocation information, the master node sends the data to be transmitted.

The beneficial effects of the invention are as follows: in a two-wire data transmission network, the master node allocates time slices to the slave nodes according to the time slice acquisition request of the slave nodes, so that the slave nodes can send data to be transmitted according to the time slice allocated for themselves. In this way, there is no need to transform the network into a Category 5 twisted pair network, and at the same time, the slave nodes transmit data according to the time slice, which can also ensure the time determinism of data transmission.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of the Internet-based data transmission method described in Embodiment 1 of the present invention;

2 is a schematic flowchart of the Internet-based data transmission method described in Embodiment 2 of the present invention;

3 is a schematic structural diagram of the Internet-based data transmission device described in Embodiment 3 of the present invention;

4 is a schematic structural diagram of the Internet-based data transmission device described in Embodiment 4 of the present invention;

5 is a schematic structural diagram of the Internet-based data transmission system described in Embodiment 5 of the present invention;

FIG. 6 is one of schematic structural diagrams of a two-wire data transmission network provided by an embodiment of the present invention;

FIG. 7 is a second schematic structural diagram of a two-wire data transmission network provided by an embodiment of the present invention.

Detailed ways

The embodiments of the present invention provide an Internet-based data transmission method, device, and system. The so-called industrial control data refers to data used for industrial process control. The method is suitable for a two-wire data transmission network, and the transmission medium of the two-wire data transmission network is a twisted pair or a shielded twisted pair. In this network, for any slave node, the data transmission is performed according to the time slice allocated by the master node, so the data transmission of the slave node has the certainty of transmission time. In addition, the network used in the embodiment of the present invention is two There is no need to transform the network into Category 5 twisted pair as in the prior art.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

As shown in FIG. 1 , which is a schematic flowchart of the Internet-based data transmission method described in Embodiment 1 of the present invention, the method is applicable to a two-wire data transmission network, and may include the following steps:

Step 101: The master node receives a time slice acquisition request sent by the slave node, where the time slice acquisition request includes the data amount of the data to be transmitted.

Step 102: Allocate time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slices, and obtain time slice allocation information.

Wherein, in one embodiment, the number of time slices that can be transmitted is limited, and how many time slices are allocated can be determined according to the data volume of the data to be transmitted. Therefore, the time slice allocation information may include time slice identifiers of each allocated time slice, so that the slave node can determine which time slices it occupies.

Step 103: Send the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information.

Among them, in one embodiment, there may be multiple industrial control data that need to be transmitted at the same time, and some of the industrial control data may be more important. Control needs, preferentially transmit important data first, and the time slice acquisition request also includes the data identifier of the data to be transmitted; Step 102 (that is, according to the data volume of the data to be transmitted and the unallocated time slice, for The data to be transmitted is allocated a time slice, and the time slice allocation information is obtained), which may specifically include the following steps:

Step A1: Determine the transmission priority corresponding to the to-be-transmitted data identifier according to the pre-stored correspondence between the data identifier and the transmission priority.

Wherein, in one embodiment, the data identifier may be an identifier representing a service type, for example, the data identifier is used to distinguish pressure sensor data, temperature sensor data, and the like. Table 1 shows an example of data identifiers and corresponding priorities. Of course, it should be noted that Table 1 is only used to describe the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

Table 1

data identification priority illustrate 1 high Pressure Sensor 2 Low Device log

Step A2: Allocate time slices for the data to be transmitted according to the determined transmission priority, the data volume of the data to be transmitted, and the unallocated time slice, and obtain time slice allocation information.

To sum up, in this embodiment of the present invention, in a two-wire data transmission network, the master node allocates a time slice to the slave node according to the time slice acquisition request of the slave node, so that the slave node can send the pending time slice according to the time slice allocated to itself. transfer data. In this way, there is no need to transform the network into a Category 5 twisted pair network, and at the same time, the slave nodes transmit data according to the time slice, which can also ensure the time determinism of data transmission.

Embodiment 2

As shown in FIG. 2 , which is a schematic flowchart of the Internet-based data transmission method described in Embodiment 2 of the present invention, the method is applicable to a two-wire data transmission network, and may include the following steps:

Step 201: The slave node sends the generated time slice acquisition request to the master node; the time slice acquisition request includes the data amount of the data to be transmitted.

Step 202: Receive the time slice allocation information sent by the master node; the time slice allocation information is that after the master node receives the time slice acquisition request, according to the data amount of the data to be transmitted and the unallocated time slice, the The data to be transmitted is obtained after allocating time slices.

Step 203: Send the data to be transmitted according to the time slice allocation information.

Wherein, in an embodiment, in order to effectively utilize the bandwidth of the two-wire data transmission network and improve the data transmission efficiency, the sending of the data to be transmitted in step 203 may specifically include: using OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing). multiplexing technology), the data to be transmitted is sent; or, the data to be transmitted is sent by using a baseband transmission mode. .

Wherein, in one embodiment, in order to implement priority transmission of important data to be transmitted, the time slice acquisition request further includes a data identifier of the data to be transmitted, so that the master node determines the to-be-transmitted data according to the data identifier. The transmission level of the transmitted data. The transmission level corresponding to the important data to be transmitted is also relatively high, and the data with a high transmission level is allocated a time slice preferentially, thereby realizing the priority transmission of the important data.

Wherein, in one embodiment, the industrial control data includes real-time data and non-real-time data, wherein the real-time data is data that has a deterministic demand for transmission time, and the non-real-time data is data that has no deterministic demand for transmission time data. In order to effectively utilize processing resources and preferentially transmit real-time data, in this embodiment of the present invention, the time slice acquisition request may be generated according to the following method: after obtaining the data to be transmitted, determine the Whether the data to be transmitted is data with time deterministic requirements; if so, generate the time slice acquisition request. In this way, it can be determined which data needs to generate a time slice acquisition request according to the data identifier. For this type of data, by sending a time slice acquisition request to the master node to acquire the time slice, the transmission time of this type of data can be guaranteed. For non-real-time data, there is no need to generate and send a time slice acquisition request, so the processing resources of the slave node, that is, the master node, can be saved.

Wherein, in one embodiment, in order to facilitate the sending of data according to the allocated time slice and ensure the time certainty of data transmission, step 203 (that is, sending the data to be transmitted according to the time slice allocation information) may specifically include the following: step:

Step B1: For each time slice in the time slice allocation information, it is detected whether the trigger time of the time slice is reached.

Step B2: If yes, send the data to be transmitted in this time slice.

Wherein, in one embodiment, if the judgment result of step B1 is no, step B1 may be continued to be executed, and step B2 may be executed until the judgment result is yes.

Wherein, in one embodiment, for each slave node, the slave node may not occupy all the time slices (for example, in one hour, only part of the time slice may be allocated to the node). Therefore, in order to improve the working efficiency of the slave node, non-real-time data can also be sent in the time interval between the allocated time slices, the embodiment of the present invention may further include the following steps:

Step C1: Add the time slice allocation information to the time slice allocation information set.

Step C2: Monitor whether the current time is included in the time slice in the time slice allocation information set.

The linear sequence of steps C1 and C2 is not limited.

Step C3: If not, judge whether it is in idle transmission time.

Wherein, the so-called idle time for transmission means that which data to be transmitted is not determined in advance at this time. That is, data that does not require time certainty at this time needs to be transmitted.

Wherein, in one embodiment, determining whether the user is in the idle transmission time may be determined according to the prior art, which is not repeated in this embodiment of the present invention.

Step C4: If it is in the idle time of transmission, use CSMA/CD (Carrier Sense Multiple Access with Collision Detection, carrier sense multiple access technology for collision detection) to transmit non-real-time data.

In this way, in the embodiment of the present invention, CSMA/CD is used to transmit non-real-time data (that is, data that has no deterministic requirement for transmission time) during idle transmission time, and real-time data is transmitted when there is a time slice, so as to realize reasonable arrangement of various data. Transmission strategy to improve the efficiency of data transmission.

Wherein, in one embodiment, the industrial process control may also generate data due to emergencies, and the data of some emergencies needs to be transmitted in time. To this end, in this embodiment of the present invention, the following steps may be further included:

Step D1: After obtaining the data to be transmitted, it is determined whether the data to be transmitted is data of a preset emergency event according to the data identifier of the data to be transmitted.

Step D2: If the data of the preset emergency event is preset, start transmitting the data of the preset emergency event.

In this way, in the embodiment of the present invention, when data of a preset emergency event is encountered, regardless of whether there is data to be transmitted in the time slice corresponding to the current time, the data of the preset emergency event is preferentially sent, which can ensure important emergency events. The data is preferentially transmitted to ensure the smooth progress of industrial process control.

Wherein, in one embodiment, if it is not the data of the preset emergency event, the following steps may be performed: according to the data identifier of the data to be transmitted, it is determined whether the data to be transmitted is data with time deterministic requirements ; if so, generate the time slice acquisition request.

To sum up, in the embodiment of the present invention, the slave node transmits data according to the time slice allocated by the master node, which can meet the requirement of data with deterministic transmission time. Moreover, the embodiments of the present invention can be implemented in a two-wire data transmission network, without the need to transform the transmission network into Category 5 twisted-pair cables, which can reduce costs and reduce the complexity of transmitting industrial control data networks.

Embodiment 3

Based on the same inventive concept, an embodiment of the present invention also provides an Internet-based data transmission device, which is suitable for a two-wire data transmission network. As shown in FIG. 3, it is a schematic structural diagram of the device, including:

A time slice acquisition request receiving module 301, configured to receive a time slice acquisition request sent from a node, where the time slice acquisition request includes the amount of data to be transmitted;

A time slice allocation module 302, configured to allocate time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slices, and obtain time slice allocation information;

The time slice allocation information sending module 303 is configured to send the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information.

Wherein, in one embodiment, the time slice acquisition request further includes a data identifier of the data to be transmitted; the time slice allocation module specifically includes:

a transmission priority determination unit, configured to determine the transmission priority corresponding to the to-be-transmitted data identifier according to the pre-stored correspondence between the data identifier and the transmission priority;

The allocation unit is configured to allocate a time slice to the data to be transmitted according to the determined transmission priority, the data volume of the data to be transmitted and the unallocated time slice, and obtain time slice allocation information.

In the embodiment of the present invention, in a two-wire data transmission network, the device allocates a time slice to the slave node according to the time slice acquisition request of the slave node, so that the slave node can send data to be transmitted according to the time slice allocated to itself. In this way, there is no need to transform the network into a Category 5 twisted pair network, and at the same time, the slave nodes transmit data according to the time slice, which can also ensure the time determinism of data transmission.

Embodiment 4

Based on the same inventive concept, an embodiment of the present invention also provides an Internet-based data transmission device, which is suitable for a two-wire data transmission network. As shown in FIG. 4 , the device includes:

The time slice acquisition request sending module 401 is configured to send the generated time slice acquisition request to the master node; the time slice acquisition request includes the data amount of the data to be transmitted;

The time slice allocation information receiving module 402 is configured to receive the time slice allocation information sent by the master node; the time slice distribution information is that after the master node receives the time slice acquisition request, according to the data amount of the data to be transmitted and the The unallocated time slice is obtained after the data to be transmitted is allocated a time slice;

The data transmission module 403 is configured to send the data to be transmitted according to the time slice allocation information.

Wherein, in one embodiment, the data transmission module is specifically used for:

Send the data to be transmitted by using the orthogonal frequency division multiplexing technology OFDM; or,

The data to be transmitted is sent in a baseband transmission manner.

Wherein, in one embodiment, the time slice acquisition request further includes a data identifier of the data to be transmitted, so that the master node determines the transmission level of the data to be transmitted according to the data identifier.

Wherein, in one embodiment, the data transmission module is specifically used for:

For each time slice in the time slice allocation information, detect whether the trigger time of the time slice is reached;

If so, send the data to be transmitted in this time slice.

Wherein, in one embodiment, the device further includes:

The adding module is used for adding the time slice allocation information to the time slice allocation information set;

a monitoring module for monitoring whether the current time is included in the time slice in the time slice allocation information set;

a transmission idle judgment module, configured to judge whether the current time is not in the time slice in the time slice allocation information set, whether it is in the transmission idle time;

The non-real-time data transmission module is used to transmit non-real-time data by adopting the carrier sense multiple access technology CSMA/CD of collision detection if it is in idle transmission time.

Wherein, in one embodiment, the apparatus further comprises:

A time slice acquisition request generating module, configured to generate the time slice acquisition request according to the following method:

After obtaining the data to be transmitted, according to the data identifier of the data to be transmitted, determine whether the data to be transmitted is data with time deterministic requirements;

If so, generate the time slice acquisition request.

Wherein, in one embodiment, the device further includes:

The preset emergency event judgment module is used to determine whether the to-be-transmitted data is the data of the preset emergency event according to the data identifier of the to-be-transmitted data after obtaining the to-be-transmitted data;

The burst data transmission module is configured to start transmitting the data of the preset emergency event if it is the data of the preset emergency event.

In the embodiment of the present invention, the device transmits data according to the time slice allocated by the master node, which can meet the requirement of data with certainty of transmission time. Moreover, the embodiments of the present invention can be implemented in a two-wire data transmission network, without the need to transform the transmission network into Category 5 twisted pair cables, which can reduce costs and reduce the complexity of transmitting industrial control data networks.

Embodiment 5

Based on the same inventive concept, an embodiment of the present invention also provides an Internet-based data transmission system, which is suitable for a two-wire data transmission network. FIG. 5 is a schematic structural diagram of the system. The system includes:

The master node 501 is configured to receive a time slice acquisition request sent by a slave node, where the time slice acquisition request includes the amount of data to be transmitted; according to the amount of data to be transmitted and the unallocated time slice, the Allocate time slices for the data to be transmitted, and obtain time slice allocation information; send the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information;

The slave node 502 is used to send the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted; the time slice allocation information sent by the master node is received; the time slice allocation information is all After the master node receives the time slice acquisition request, it is obtained after allocating time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slice; the data to be transmitted.

Regarding the apparatuses in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments of the method, and will not be described in detail here.

Wherein, in an embodiment, a schematic structural diagram of the above-mentioned two-wire data transmission network is shown in FIG. 6 , including:

The first Ethernet converter 601: used to convert the standard Ethernet signal transmitted by the Category 5 twisted pair into the Ethernet frame signal;

A digital-to-analog conversion module 602, configured to convert the Ethernet frame signal into a digital format signal for power transmission through digital-to-analog conversion;

The processing module 603 is used for rectifying, filtering and amplifying the digital format signal to obtain a signal conforming to the broadband power line specification;

Wherein, in one embodiment, the broadband power line is, for example, a Homeplug AV power line.

The two-wire cable 604 is used to transmit signals conforming to the broadband power line specification for transmission.

Wherein, in one embodiment, the two-wire cable is, for example, a commonly used two-wire cable such as Profibus, CAN, Modbus, 485 bus, HART (analog), FSK, and FF.

The two-wire cable 604 is connected with various devices (including a control device and a data transmission device), so the two-wire cable 604 can transmit signals to at least one device connected thereto.

The structure of the two-wire data transmission network shown in FIG. 6 is used to send signals to the connected equipment. As shown in FIG. 7, it is another schematic diagram of the structure of the two-wire data transmission network. The signals sent by the connected device include:

The power line coupling circuit 701 is used to transmit the low-voltage and high-frequency programmable logic controller waveform on the two-wire cable to the programmable logic controller analog front end;

The programmable logic controller analog front end 702 is used to filter the received signal through the band-pass filter and then pass it to the amplification filter after filtering out the signal other than the PLC;

The amplification filter 703 is used to amplify and filter the signal and transmit it to the ADC (analog-to-digital converter);

ADC704, which is used to convert the received signal into a digital signal and transmit it to the Ethernet converter;

The second Ethernet converter 705 is configured to convert the received signal into an Ethernet frame signal, and convert the Ethernet frame signal into a standard Ethernet signal suitable for Category 5 twisted pair transmission.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

The computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory result in an article of manufacture comprising the instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (15)

1. an Internet-based data transmission method, is characterized in that, is applicable to two-wire data transmission network, and described method comprises: The master node receives a time slice acquisition request sent when the slave node determines that the data to be transmitted is data with time deterministic requirements, and the time slice acquisition request includes the data amount of the data to be transmitted; According to the data amount of the data to be transmitted and the unallocated time slice, allocate a time slice for the data to be transmitted, and obtain time slice allocation information; sending the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information; If it is in the idle time of transmission, the carrier sense multiple access technology CSMA/CD of collision detection is used to receive the non-real-time data sent from the node. 2. The method according to claim 1, wherein the time slice acquisition request further includes a data identifier of the data to be transmitted; , allocate a time slice for the data to be transmitted, and obtain time slice allocation information, which specifically includes: Determine the transmission priority corresponding to the to-be-transmitted data identifier according to the correspondence between the pre-stored data identifier and the transmission priority; According to the determined transmission priority, the data amount of the data to be transmitted, and the unallocated time slice, time slices are allocated to the data to be transmitted, and time slice allocation information is obtained. 3. An internet-based data transmission method, characterized in that it is applicable to a two-wire data transmission network, the method comprising: After obtaining the data to be transmitted from the node, according to the data identifier of the data to be transmitted, determine whether the data to be transmitted is data with time deterministic requirements, and if so, generate a time slice acquisition request; The slave node sends the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted; The slave node receives the time slice allocation information sent by the master node; the time slice allocation information is that after the master node receives the time slice acquisition request, according to the data amount of the data to be transmitted and the unallocated time slice, the Obtained after the data to be transmitted is allocated a time slice; The slave node sends the data to be transmitted according to the time slice allocation information; adding the time slice allocation information to the time slice allocation information set from the node; and, monitoring whether the current time is included in the time slice in the time slice allocation information set; If not, judge whether it is in idle transmission time; If it is in the idle time of transmission, the carrier sense multiple access technology CSMA/CD of collision detection is used to transmit non-real-time data. 4. The method according to claim 3, wherein the sending the data to be transmitted specifically comprises: Send the data to be transmitted by using the orthogonal frequency division multiplexing technology OFDM; or, The data to be transmitted is sent in a baseband transmission manner. 5. The method according to claim 3, wherein the time slice acquisition request further includes a data identifier of the data to be transmitted, so that the master node determines the data identifier of the data to be transmitted according to the data identifier. Transmission class. 6. The method according to claim 3, wherein the sending the data to be transmitted according to the time slice allocation information specifically comprises: For each time slice in the time slice allocation information, detect whether the trigger time of the time slice is reached; If so, send the data to be transmitted in this time slice. 7. The method according to claim 3, wherein the method further comprises: After obtaining the data to be transmitted, determine whether the data to be transmitted is data of a preset emergency event according to the data identifier of the data to be transmitted; If the data of the preset emergency event is preset, the transmission of the data of the preset emergency event is started. 8. An internet-based data transmission device, characterized in that it is applicable to a two-wire data transmission network, the device comprising: a time slice acquisition request receiving module, configured to receive a time slice acquisition request sent by the slave node when it is determined that the data to be transmitted is data with time deterministic requirements, where the time slice acquisition request includes the data amount of the data to be transmitted; a time slice allocation module, configured to allocate time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slices, and obtain time slice allocation information; a time slice allocation information sending module, configured to send the time slice allocation information to the slave node, so that the slave node sends the to-be-transmitted data according to the time slice allocation information; If it is in the idle time of transmission, the carrier sense multiple access technology CSMA/CD of collision detection is used to receive the non-real-time data sent from the node. 9. The apparatus according to claim 8, wherein the time slice acquisition request further includes a data identifier of the data to be transmitted; the time slice allocation module specifically includes: a transmission priority determination unit, configured to determine the transmission priority corresponding to the to-be-transmitted data identifier according to the pre-stored correspondence between the data identifier and the transmission priority; The allocation unit is configured to allocate a time slice to the data to be transmitted according to the determined transmission priority, the data volume of the data to be transmitted and the unallocated time slice, and obtain time slice allocation information. 10. An internet-based data transmission device, characterized in that it is suitable for a two-wire data transmission network, the device comprising: A time slice acquisition request generating module is configured to, after obtaining the data to be transmitted, determine whether the data to be transmitted is data with time deterministic requirements according to the data identifier of the data to be transmitted, and if so, generate a time slice acquisition request; a time slice acquisition request sending module, configured to send the generated time slice acquisition request to the master node; the time slice acquisition request includes the amount of data to be transmitted; The time slice allocation information receiving module is used to receive the time slice allocation information sent by the master node; the time slice distribution information is that after the master node receives the time slice acquisition request, according to the data amount of the to-be-transmitted data and the future The allocated time slice is obtained after the data to be transmitted is allocated a time slice; a data transmission module, configured to send the data to be transmitted according to the time slice allocation information; The adding module is used for adding the time slice allocation information to the time slice allocation information set; and, a monitoring module for monitoring whether the current time is included in the time slice in the time slice allocation information set; a transmission idle judgment module, configured to judge whether the current time is not in the time slice in the time slice allocation information set, whether it is in the transmission idle time; The non-real-time data transmission module is used to transmit non-real-time data by adopting the carrier sense multiple access technology CSMA/CD of collision detection if it is in idle transmission time. 11. The device according to claim 10, wherein the data transmission module is specifically used for: Send the data to be transmitted by using the orthogonal frequency division multiplexing technology OFDM; or, The data to be transmitted is sent in a baseband transmission manner. 12 . The device according to claim 10 , wherein the time slice acquisition request further includes a data identifier of the data to be transmitted, so that the master node determines the identifier of the data to be transmitted according to the data identifier. 13 . Transmission class. 13. The device according to claim 10, wherein the data transmission module is specifically used for: For each time slice in the time slice allocation information, detect whether the trigger time of the time slice is reached; If so, send the data to be transmitted in this time slice. 14. The apparatus of claim 10, wherein the apparatus further comprises: A preset emergency event judgment module, configured to determine whether the to-be-transmitted data is data of a preset emergency event according to the data identifier of the to-be-transmitted data after obtaining the to-be-transmitted data; The burst data transmission module is configured to start transmitting the data of the preset emergency event if it is the data of the preset emergency event. 15. An internet-based data transmission system, characterized in that it is suitable for a two-wire data transmission network, the system comprising: The master node is used to receive a time slice acquisition request sent when the slave node determines that the data to be transmitted is data with time deterministic requirements, and the time slice acquisition request includes the data amount of the data to be transmitted; The amount of data and the unallocated time slice, allocate time slices for the data to be transmitted, and obtain time slice allocation information; send the time slice allocation information to the slave node, so that the slave node can use the time slice according to the time slice Allocating information, sending the data to be transmitted, if it is in the idle time of transmission, adopting the carrier sense multiple access technology CSMA/CD of collision detection to receive the non-real-time data sent from the node; After the slave node obtains the data to be transmitted, according to the data identifier of the data to be transmitted, determine whether the data to be transmitted is data with time deterministic requirements, if so, generate the time slice acquisition request; send the generated The time slice acquisition request is sent to the master node; the time slice acquisition request includes the amount of data to be transmitted; the time slice allocation information sent by the master node is received; the time slice allocation information is for the master node to receive the time slice After obtaining the request, it is obtained after allocating time slices for the data to be transmitted according to the data amount of the data to be transmitted and the unallocated time slice; sending the data to be transmitted according to the time slice allocation information; sending the data to be transmitted; The time slice allocation information is added to the time slice allocation information set; and, monitoring whether the current time is included in the time slice in the time slice allocation information set; if not, it is judged whether it is in the transmission idle time; time, the carrier sense multiple access technology CSMA/CD of collision detection is used to transmit non-real-time data.