Data transmission method based on time-sensitive network and intelligent measurement terminal

Abstract

The invention discloses a data transmission method based on a time-sensitive network and an intelligent measurement terminal, and belongs to the technical field of intelligent measurement terminals, and the method comprises the following steps: obtaining measurement data of each intelligent measurement terminal, and dividing and packaging the measurement data to obtain a plurality of sub-data packets; respectively storing the sub-data packets into a first cache region and a second cache region of the intelligent measurement terminal to which the sub-data packets belong; constructing a measurement data time sensitive network between each intelligent measurement terminal and the concentrator; and on the basis of the network flow priorities of the measurement data time sensitive network and the intelligent measurement terminals, transmitting complete measurement data of each intelligent measurement terminal to a concentrator through dual-band communication. According to the invention, the problem that the transmission efficiency of the measurement data uploaded by the current intelligent measurement terminal is insufficient is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent measurement terminals, and in particular relates to a data transmission method based on a time-sensitive network and an intelligent measurement terminal. Background Art

[0002] The intelligent measurement terminal is an advanced measurement device that integrates modern communication technology, computer technology, and measurement technology. It is widely used in data collection, monitoring, and control systems of smart grids. Its main functions include data collection and transmission, remote monitoring and control, fault detection and alarm, data analysis and optimization, etc. The smart meter is one of the intelligent measurement terminals for smart grid data collection. It undertakes the tasks of raw power data collection, metering, and transmission. The collected raw power data needs to be packaged and transmitted to the concentrator for data analysis and monitoring. Time-sensitive networking is a family of protocols that implement deterministic minimum time delay in non-deterministic Ethernet. It can provide a general time-sensitive mechanism for the data link layer of the Ethernet protocol to ensure real-time, deterministic, and reliable transmission of data in the network.

[0003] During the data transmission process of smart meters, network congestion, insufficient equipment processing capabilities or limitations of communication protocols may cause data transmission delays and jitters, affecting the real-time and accuracy of the data. Especially when transmitting large amounts of data, data loss, duplication or disordered order may occur, resulting in insufficient data transmission efficiency. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a data transmission method based on a time-sensitive network and an intelligent measurement terminal, which solves the problem of insufficient transmission efficiency of measurement data uploaded by the current intelligent measurement terminal.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] In one aspect, the present invention provides a data transmission method based on a time-sensitive network, comprising the following steps:

[0007] S1. respectively obtain measurement data of each intelligent measurement terminal, and divide and encapsulate the measurement data to obtain a number of sub-data packets;

[0008] S2, storing the sub-data packets into the first buffer area and the second buffer area of ​​the intelligent measurement terminal to which they belong respectively;

[0009] S3, build a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator;

[0010] S4. Based on the measurement data time-sensitive network and the network traffic priority of the intelligent measurement terminal, the complete measurement data of each intelligent measurement terminal is transmitted to the concentrator through dual-band communication.

[0011] Furthermore, the S1 comprises the following steps:

[0012] S11, respectively obtaining measurement data of each intelligent measurement terminal;

[0013] S12, dividing the measured data according to a preset maximum segment size to obtain a plurality of data segments;

[0014] S13. Assign unique serial numbers to the header information added to each data segment in turn, and encapsulate them to obtain several sub-data packets.

[0015] Furthermore, S2 comprises the following steps:

[0016] S21, respectively setting a first cache area and a second cache area for each intelligent measurement terminal;

[0017] S22: Store the sub-data packets of each intelligent measurement terminal into the first buffer area and the second buffer area of ​​the intelligent measurement terminal respectively.

[0018] Furthermore, S3 comprises the following steps:

[0019] S31, constructing a star network topology structure between a concentrator and several intelligent measurement terminals;

[0020] S32, setting an access layer to connect the first cache area and the second cache area of ​​each intelligent measurement terminal;

[0021] S33, setting a convergence layer to aggregate sub-data packets of each intelligent measurement terminal in the access layer;

[0022] S34. Setting a core layer to connect the convergence layer and the concentrator to obtain a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator.

[0023] Furthermore, the measurement data time-sensitive network uses IEEE 802.1Qbv protocol to adjust the scheduling of time-sensitive traffic, uses IEEE 802.1Qav to protect AVB traffic from interference from other traffic, and uses SNMP network management protocol to remotely monitor and manage each intelligent measurement terminal.

[0024] Furthermore, the dual-band communication includes a first frequency band communication network and a second frequency band communication network, wherein the first frequency band communication network and the second frequency band communication network transmit sub-data packets through different physical frequency bands, the first frequency band communication network and the second frequency band communication network are communication networks of different physical frequency bands, do not interfere with each other, and each has independent network communication resources.

[0025] Furthermore, the network traffic priorities of the intelligent measurement terminal are, from high to low, the first priority, the second priority and the third priority, and the corresponding priority fields are, in order, the time-triggered flow, the AVB flow and the BE flow; the priority field of the sub-data packet in the first cache area of ​​the intelligent measurement terminal corresponds to the network traffic priority to which the intelligent measurement terminal belongs;

[0026] The first frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are AVB streams and BE streams; the second frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are time-triggered streams.

[0027] Furthermore, the S4 comprises the following steps:

[0028] S41, according to the priority field and the unique sequence number of the sub-data packet in the first buffer area of ​​each intelligent measurement terminal, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to sequentially transmit the corresponding sub-data packet to the concentrator, and obtain the data verification result of the concentrator;

[0029] S42, judging whether there is a sub-data packet loss or sub-data packet verification failure in the data verification result, if so, proceeding to S43, otherwise proceeding to S46;

[0030] S43, according to the data verification result, obtaining the unique sequence number corresponding to the sub-data packet loss and the sub-data packet verification failure as the sequence number to be retransmitted;

[0031] S44, according to the sequence number to be retransmitted, before retransmitting the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted each time, reset the priority field of the data packet, and use the sub-data packet as the sub-data packet to be retransmitted;

[0032] S45, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to transmit the sub-data packets to be retransmitted in the second cache area to the concentrator;

[0033] S46. Repeat S42-S45 until the concentrator verifies and receives the complete measurement data of each intelligent measurement terminal.

[0034] Further, the S44 comprises the following steps:

[0035] S441, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is BE stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to AVB stream;

[0036] S442: If the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is an AVB stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered stream;

[0037] S443, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is a time-triggered flow, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered flow;

[0038] S444: If there are still sub-data packets lost or verification fails in the second cache area, directly set the priority field of the sub-data packets in the second cache area corresponding to the sequence number to be retransmitted to a time-triggered flow.

[0039] The beneficial effects of the present invention are as follows: a data transmission method based on a time-sensitive network provided by the present invention divides the complete data measurement information into several sub-data packets by dividing and encapsulating the measurement data of each intelligent measurement terminal, which can more effectively manage and transmit data and improve the flexibility and efficiency of data processing; by storing the sub-data packets in the first cache area and the second cache area of ​​the intelligent measurement terminal respectively, data redundancy and backup are provided, and the reliability and fault tolerance of data transmission are enhanced. During the data transmission process, even if part of the data is lost or a verification error occurs, it can be recovered or retransmitted from the spare cache to ensure the integrity and accuracy of the data; by constructing a measurement data time-sensitive network, the timing of data transmission can be optimized according to the priority, timeliness and importance of the intelligent measurement terminal, ensuring that key data can be transmitted to the concentrator in a timely and accurate manner, meeting the needs of real-time monitoring and control, and providing a basis for priority recovery or retransmission after data loss or verification error; by transmitting the complete measurement data to the concentrator through dual-band communication, the communication characteristics of different frequency bands can be effectively utilized to improve the efficiency and stability of data transmission;

[0040] The present invention sets the priority of the measurement data uploaded by the intelligent measurement terminal and adopts dual-band communication. The first-band communication network is used to preferentially transmit the sub-packets whose priority fields are AVB streams and BE streams, and the second-band communication network is used to preferentially transmit the sub-packets whose priority fields are time-triggered streams, so that the low-priority task communication will not occupy the physical network of the high-priority task communication, thereby ensuring the real-time communication effect of the task;

[0041] The present invention sets a first cache area and a second cache area for the communication backup data cache, so that when packet loss and data verification failure occur in the low-priority task communication of the intelligent measurement terminal, the intelligent measurement terminal can send the information in the communication backup data cache again with a higher priority, avoiding the time consumption of re-extracting the sent data and encapsulating it into a data packet.

[0042] On the other hand, the present invention further provides an intelligent measurement terminal, which uses the above-mentioned data transmission method based on time-sensitive network to transmit terminal measurement data to the concentrator.

[0043] The beneficial effects of the present invention are as follows: the intelligent measurement terminal provided by the present invention and adopting the above-mentioned data transmission method based on time-sensitive network can efficiently deal with the delay defects caused by sub-packet leakage or verification failure when uploading measurement information, and can ensure that the measurement data of each intelligent measurement terminal is efficiently, completely and accurately transmitted to the concentrator.

[0044] Other advantages of the present invention will be analyzed in more detail in subsequent embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 This is a flowchart of the steps of a data transmission method based on a time-sensitive network in Example 1 of the present invention. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0048] like Figure 1 As shown, in one embodiment of the present invention, the present invention provides a data transmission method based on a time-sensitive network, comprising the following steps:

[0049] S1. respectively obtain measurement data of each intelligent measurement terminal, and divide and encapsulate the measurement data to obtain a number of sub-data packets;

[0050] The S1 comprises the following steps:

[0051] S11, respectively obtaining measurement data of each intelligent measurement terminal;

[0052] S12, dividing the measured data according to a preset maximum segment size to obtain a plurality of data segments;

[0053] In this solution, the preset maximum segment size can determine the size of the maximum data segment transmitted at one time, and is set based on the maximum transmission unit of the receiving end.

[0054] S13. Assign unique serial numbers to the header information added to each data segment in turn, and encapsulate them to obtain several sub-data packets.

[0055] In this solution, the unique sequence number of each data segment includes the data segment division sequence information, the coding information of the smart measurement terminal to which the data segment belongs, and the location area information. Based on the unique sequence number, the measurement location of the data segment, the smart measurement terminal to which it belongs, and the data segment sequence information can be quickly confirmed, which facilitates the rapid positioning of the sub-data packet and resending.

[0056] S2, storing the sub-data packets into the first buffer area and the second buffer area of ​​the intelligent measurement terminal to which they belong respectively;

[0057] The S2 comprises the following steps:

[0058] S21, respectively setting a first cache area and a second cache area for each intelligent measurement terminal;

[0059] In this solution, both the first buffer area and the second buffer area can buffer sub-data packets sent from the intelligent measurement terminal to the concentrator.

[0060] S22: Store the sub-data packets of each intelligent measurement terminal into the first buffer area and the second buffer area of ​​the intelligent measurement terminal respectively.

[0061] S3, build a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator;

[0062] The S3 comprises the following steps:

[0063] S31, constructing a star network topology structure between a concentrator and several intelligent measurement terminals;

[0064] In this solution, a star-shaped network topology is used to set the concentrator at a central location, and smart meters are scattered around, which facilitates centralized management and troubleshooting.

[0065] S32, setting an access layer to connect the first cache area and the second cache area of ​​each intelligent measurement terminal;

[0066] S33, setting a convergence layer to aggregate sub-data packets of each intelligent measurement terminal in the access layer;

[0067] S34. Setting a core layer to connect the convergence layer and the concentrator to obtain a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator.

[0068] The measurement data time-sensitive network adopts IEEE 802.1Qbv protocol to adjust the scheduling of time-sensitive traffic, adopts IEEE 802.1Qav to protect AVB traffic from interference from other traffic, and adopts SNMP network management protocol to remotely monitor and manage each intelligent measurement terminal.

[0069] S4. Based on the measurement data time-sensitive network and the network traffic priority of the intelligent measurement terminal, the complete measurement data of each intelligent measurement terminal is transmitted to the concentrator through dual-band communication.

[0070] The dual-band communication includes a first frequency band communication network and a second frequency band communication network, wherein the first frequency band communication network and the second frequency band communication network transmit sub-data packets through different physical frequency bands. The first frequency band communication network and the second frequency band communication network are communication networks of different physical frequency bands, do not interfere with each other, and each has independent network communication resources.

[0071] The network traffic priorities of the intelligent measurement terminal are the first priority, the second priority and the third priority from high to low, and the corresponding priority fields are the time-triggered flow, the AVB flow and the BE flow respectively; the priority field of the sub-data packet in the first cache area of ​​the intelligent measurement terminal corresponds to the network traffic priority to which the intelligent measurement terminal belongs;

[0072] The first frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are AVB streams and BE streams; the second frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are time-triggered streams.

[0073] In this solution, when both the first frequency band communication network and the second frequency band communication network are occupied with communication resources, the first frequency band communication network is only used to transmit sub-packets whose priority fields are AVB streams and BE streams, and the second frequency band communication network is only used to transmit sub-packets whose priority fields are time-triggered streams;

[0074] When the communication resources occupied by the first frequency band communication network are empty and the communication resources occupied by the second frequency band communication network are not empty, the first frequency band communication network is also used to transmit sub-data packets whose priority field is a time-triggered stream; when the communication resources occupied by the second frequency band communication network are empty and the communication resources occupied by the first frequency band communication network are not empty, the second frequency band communication network is also used to transmit sub-data packets whose priority field is an AVB stream and a BE stream.

[0075] In this solution, dual-band communication provides a basis for reducing the time consumption of repackaging measurement data after data packet loss or verification failure.

[0076] The S4 comprises the following steps:

[0077] S41, according to the priority field and the unique sequence number of the sub-data packet in the first buffer area of ​​each intelligent measurement terminal, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to sequentially transmit the corresponding sub-data packet to the concentrator, and obtain the data verification result of the concentrator;

[0078] S42, judging whether there is a sub-data packet loss or sub-data packet verification failure in the data verification result, if so, proceeding to S43, otherwise proceeding to S46;

[0079] S43, according to the data verification result, obtaining the unique sequence number corresponding to the sub-data packet loss and the sub-data packet verification failure as the sequence number to be retransmitted;

[0080] S44, according to the sequence number to be retransmitted, before retransmitting the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted each time, reset the priority field of the data packet, and use the sub-data packet as the sub-data packet to be retransmitted;

[0081] The S44 comprises the following steps:

[0082] S441, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is BE stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to AVB stream;

[0083] S442: If the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is an AVB stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered stream;

[0084] S443, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is a time-triggered flow, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered flow;

[0085] S444: If there are still sub-data packets lost or verification fails in the second cache area, directly set the priority field of the sub-data packets in the second cache area corresponding to the sequence number to be retransmitted to a time-triggered flow.

[0086] In this scheme, based on the sequence number to be retransmitted, the priority field of the corresponding sub-packet in the second cache area is set to a priority field one level higher than the priority field of the corresponding sub-packet in the first cache area. The highest priority field is a time-triggered flow, thereby improving the data transmission priority of the retransmitted sub-packet, improving the efficiency of transmitting the complete measurement data to the concentrator, and ensuring the efficiency of the concentrator performing data parsing based on the complete measurement data.

[0087] S45, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to transmit the sub-data packets to be retransmitted in the second cache area to the concentrator;

[0088] S46. Repeat S42-S45 until the concentrator verifies and receives the complete measurement data of each intelligent measurement terminal.

[0089] On the other hand, the present invention further provides an intelligent measurement terminal, which uses the above-mentioned data transmission method based on time-sensitive network to transmit measurement data to the concentrator.

[0090] The data transmission method based on the time-sensitive network can enable the measurement data of each intelligent measurement terminal to be efficiently, completely and accurately transmitted to the concentrator, so that the data analysis terminal can perform corresponding analysis and processing in a timely manner.

[0091] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A data transmission method based on a time-sensitive network, characterized in that: The steps include: S1. respectively obtain measurement data of each intelligent measurement terminal, and divide and encapsulate the measurement data to obtain a number of sub-data packets; S2, storing the sub-data packets into the first buffer area and the second buffer area of ​​the intelligent measurement terminal to which they belong respectively; S3, build a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator; S4. Based on the measurement data time-sensitive network and the network traffic priority of the intelligent measurement terminal, the complete measurement data of each intelligent measurement terminal is transmitted to the concentrator through dual-band communication.

2. The data transmission method based on a time-sensitive network according to claim 1, characterized in that: The S1 comprises the following steps: S11, respectively obtaining measurement data of each intelligent measurement terminal; S12, dividing the measured data according to a preset maximum segment size to obtain a plurality of data segments; S13. Assign unique serial numbers to the header information added to each data segment in turn, and encapsulate them to obtain several sub-data packets.

3. The data transmission method based on a time-sensitive network according to claim 1, characterized in that: The S2 comprises the following steps: S21, respectively setting a first cache area and a second cache area for each intelligent measurement terminal; S22: Store the sub-data packets of each intelligent measurement terminal into the first buffer area and the second buffer area of ​​the intelligent measurement terminal respectively.

4. The method for data transmission based on a time-sensitive network according to claim 3, characterized in that: The S3 comprises the following steps: S31, constructing a star network topology structure between a concentrator and several intelligent measurement terminals; S32, setting an access layer to connect the first cache area and the second cache area of ​​each intelligent measurement terminal; S33, setting a convergence layer to aggregate sub-data packets of each intelligent measurement terminal in the access layer; S34. Setting a core layer to connect the convergence layer and the concentrator to obtain a measurement data time-sensitive network between each intelligent measurement terminal and the concentrator.

5. The method for data transmission based on a time-sensitive network according to claim 4, characterized in that: The measurement data time-sensitive network adopts IEEE 802.1Qbv protocol to adjust the scheduling of time-sensitive traffic, adopts IEEE 802.1Qav to protect AVB traffic from interference from other traffic, and adopts SNMP network management protocol to remotely monitor and manage each intelligent measurement terminal.

6. The data transmission method based on a time-sensitive network according to claim 5, characterized in that: The dual-band communication includes a first frequency band communication network and a second frequency band communication network, wherein the first frequency band communication network and the second frequency band communication network transmit sub-data packets through different physical frequency bands. The first frequency band communication network and the second frequency band communication network are communication networks of different physical frequency bands, do not interfere with each other, and each has independent network communication resources.

7. The data transmission method based on a time-sensitive network according to claim 6, characterized in that: The network traffic priorities of the intelligent measurement terminal are the first priority, the second priority and the third priority from high to low, and the corresponding priority fields are the time-triggered flow, the AVB flow and the BE flow respectively; the priority field of the sub-data packet in the first cache area of ​​the intelligent measurement terminal corresponds to the network traffic priority to which the intelligent measurement terminal belongs; The first frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are AVB streams and BE streams; the second frequency band communication network is used to preferentially transmit sub-data packets whose priority fields are time-triggered streams.

8. The method for data transmission based on a time-sensitive network according to claim 7, characterized in that: The S4 comprises the following steps: S41, according to the priority field and the unique sequence number of the sub-data packet in the first buffer area of ​​each intelligent measurement terminal, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to sequentially transmit the corresponding sub-data packet to the concentrator, and obtain the data verification result of the concentrator; S42, judging whether there is a sub-data packet loss or sub-data packet verification failure in the data verification result, if so, proceeding to S43, otherwise proceeding to S46; S43, according to the data verification result, obtaining the unique sequence number corresponding to the sub-data packet loss and the sub-data packet verification failure as the sequence number to be retransmitted; S44, according to the sequence number to be retransmitted, before retransmitting the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted each time, reset the priority field of the data packet, and use the sub-data packet as the sub-data packet to be retransmitted; S45, based on the measurement data time-sensitive network, using the first frequency band communication network and the second frequency band communication network to transmit the sub-data packets to be retransmitted in the second cache area to the concentrator; S46. Repeat S42-S45 until the concentrator verifies and receives the complete measurement data of each intelligent measurement terminal.

9. The method for data transmission based on a time-sensitive network according to claim 8, characterized in that: The S44 comprises the following steps: S441, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is BE stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to AVB stream; S442: If the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is an AVB stream, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered stream; S443, if the priority field of the sub-data packet in the first buffer area corresponding to the sequence number to be retransmitted is a time-triggered flow, set the priority field of the sub-data packet in the second buffer area corresponding to the sequence number to be retransmitted to a time-triggered flow; S444: If there are still sub-data packets lost or verification fails in the second cache area, directly set the priority field of the sub-data packets in the second cache area corresponding to the sequence number to be retransmitted to a time-triggered flow.

10. An intelligent measurement terminal, characterized in that: The measurement data is transmitted to the concentrator using the time-sensitive network-based data transmission method as described in any one of claims 1 to 9.

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