High and low speed hybrid cable communication protocol

Abstract

The invention discloses a high-low speed hybrid cable communication protocol, which comprises a main control module and a sub-control module, a high-speed data transmission channel and a low-speed data transmission channel which are isolated are arranged between the main control module and the sub-control module, for the high-speed data transmission channel, a three-wire system MLVDS is adopted to carry out high-speed data transmission, and for the low-speed data transmission channel, a three-wire system MLVDS is adopted to carry out low-speed data transmission. The data including videos, images and radar signals of the main control module are transmitted to the sub-control module at a high speed; and for a low-speed data transmission channel, a one-line MLVDS is adopted to carry out low-speed data transmission. According to the high-low speed hybrid cable communication protocol disclosed by the invention, the high-speed data and the low-speed control data are respectively transmitted by using the three-wire MLVDS and the one-wire MLVDS, so that the high-speed data and the low-speed control data are ensured not to interfere with each other, meanwhile, the hardware interface and the wiring design are greatly simplified, and the stability and the reliability of the system are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of communication protocols, and in particular relates to a high-low speed hybrid cable communication protocol. Background Art

[0002] At present, most communication protocols adopt a single-rate transmission mode, either supporting only high-speed interfaces or only supporting low-speed interfaces. This causes problems of low transmission efficiency and unstable signals in some applications, especially in systems with high bandwidth requirements, where the transmission of low-speed control data often interrupts the transmission of high-speed data, resulting in system instability and unreliability. Existing problems:

[0003] 1. Interference between high-speed and low-speed data: In existing communication protocols, when high-speed data and low-speed control instructions need to be processed simultaneously, high-speed data is easily interrupted by low-speed data during transmission, resulting in data loss, system delays and instability.

[0004] 2. Poor system stability: Low-speed data transmission often affects the stable transmission of high-speed data. Especially in applications with high precision and high real-time requirements, the mixed transmission of high-speed and low-speed data will affect the overall communication quality.

[0005] 3. Complex interfaces and wiring: Existing solutions require independent interfaces and cables for high-speed and low-speed data, which increases the complexity of hardware and wiring, and increases system costs and design difficulty.

[0006] Therefore, further improvements are made to the above problems. Summary of the invention

[0007] The main purpose of the present invention is to provide a high-low speed hybrid cable communication protocol, which uses three-wire MLVDS and one-wire MLVDS to transmit high-speed data and low-speed control data respectively, ensuring that the two do not interfere with each other, while greatly simplifying the hardware interface and wiring design, and improving the stability and reliability of the system.

[0008] To achieve the above objectives, the present invention provides a high-low speed hybrid cable communication protocol, comprising a main control module and a sub-control module, wherein an isolated high-speed data transmission channel and a low-speed data transmission channel are provided between the main control module and the sub-control module, wherein:

[0009] For the high-speed data transmission channel, a three-wire MLVDS is used for high-speed data transmission, so as to transmit the data including video, image and radar signal of the main control module to the sub-control module at high speed;

[0010] For the low-speed data transmission channel, a one-wire MLVDS is used to transmit low-speed data, so as to transmit the sending control instruction of the main control module to the sub-control module and transmit the feedback information of the sub-control module to the main control module.

[0011] As a further preferred technical solution of the above technical solution, during the data transmission process, the high-speed data transmission channel and the low-speed data transmission channel have different protocol frame structures respectively:

[0012] For the high-speed data frame structure of the high-speed transmission channel: including the start bit, data payload, check bit and stop bit, the high-speed data frame is designed to be transmitted in a shorter time slot to ensure the continuity and stability of the data;

[0013] For the low-speed data frame structure of the low-speed transmission channel: it contains the control instruction data frame, the transmitted data is smaller, but it also includes the start bit, data bit and stop bit to ensure the correctness of data transmission.

[0014] As a further preferred technical solution of the above technical solution, the main control module manages the data transmission of the high-speed data transmission channel and the low-speed data transmission channel, and ensures efficient transmission of the two types of data through the design of clock signals and protocol frame structures.

[0015] As a further preferred technical solution of the above technical solution, the three-wire MLVDS includes a CP signal, a CLK signal and a DATA signal.

[0016] As a further preferred technical solution of the above technical solution, the transmission rate of the high-speed data transmission channel is 200Mbps.

[0017] The beneficial effects of the present invention are:

[0018] 1. High-speed data and low-speed data do not interfere with each other

[0019] The present invention can effectively avoid interruption and interference caused by low-speed data transmission during high-speed data transmission. The two are isolated through different MLVDS transmission channels, ensuring the continuity and stability of high-speed data.

[0020] Improve system stability and reliability. Two independent data transmission channels are used to transmit high-speed data and low-speed data simultaneously in the same cable, which improves system stability and reliability and reduces delays and losses in data transmission.

[0021] 2. Simplify wiring and hardware design

[0022] The present invention reduces the number of hardware interfaces and the complexity of cable wiring by performing mixed transmission of high-speed data and low-speed data in the same cable, thereby reducing the cost of system design and manufacturing.

[0023] 3. Compatible with various application scenarios

[0024] This protocol is particularly suitable for application scenarios that require simultaneous transmission of high-speed data and low-speed control instructions. It is widely used in industrial control, automation systems, sensor networks, vehicle communication systems and other occasions that require high reliability and high bandwidth data transmission.

[0025] 4. Improve communication efficiency

[0026] Since high-speed data and low-speed data will not conflict at all during the transmission process, the data transmission efficiency is greatly improved, ensuring that tasks with high real-time requirements can proceed smoothly, especially in real-time control systems, where low-speed data transmission will not affect important high-speed data flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the present invention.

[0028] Figure 2 It is a transmission path schematic diagram of the high-speed data transmission channel of the present invention.

[0029] Figure 3 It is a transmission path schematic diagram of the low-speed data transmission channel of the present invention. DETAILED DESCRIPTION

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0031] In the preferred embodiments of the present invention, those skilled in the art should note that the cables and the like involved in the present invention may be regarded as prior art.

[0032] Preferred embodiments.

[0033] like Figure 1-3 As shown, the present invention discloses a high-low speed hybrid cable communication protocol, including a main control module and a sub-control module, wherein an isolated high-speed data transmission channel and a low-speed data transmission channel are provided between the main control module and the sub-control module, wherein:

[0034] For the high-speed data transmission channel, a three-wire MLVDS is used for high-speed data transmission, so as to transmit the data including video, image and radar signal of the main control module to the sub-control module at high speed;

[0035] For the low-speed data transmission channel, a one-wire MLVDS is used to transmit low-speed data, so as to transmit the sending control instruction of the main control module to the sub-control module and transmit the feedback information of the sub-control module to the main control module.

[0036] Specifically, during data transmission, the high-speed data transmission channel and the low-speed data transmission channel have different protocol frame structures:

[0037] For the high-speed data frame structure of the high-speed transmission channel: including the start bit, data payload, check bit and stop bit, the high-speed data frame is designed to be transmitted in a shorter time slot to ensure the continuity and stability of the data;

[0038] For the low-speed data frame structure of the low-speed transmission channel: it contains the control instruction data frame, the transmitted data is smaller, but it also includes the start bit, data bit and stop bit to ensure the correctness of data transmission.

[0039] More specifically, the main control module manages the data transmission of the high-speed data transmission channel and the low-speed data transmission channel, and ensures efficient transmission of the two types of data through the design of clock signals and protocol frame structures, wherein:

[0040] During the transmission process, the high-speed transmission channel uses the clock signal and the gating signal to determine the validity of the data. During the data transmission, the gating is high and the data jumps on the rising edge of the clock. At the receiving end, the rising edge of the gating signal is used to determine the start of data reception, and the data is collected by the falling edge of the clock. During the high-speed transmission process, the clock signal and the gating signal are controlled, so the transmission can be high-speed and effective.

[0041] In low-speed transmission channels, due to the low rate, the UART protocol transmission method can be used. There is only a data line. A low-level start bit and a high-level end bit are added to the transmitted data. The data is transmitted at the baud rate negotiated by the sender and receiver. Generally, the receiving end determines the start of receiving data by the falling edge of the start bit of each byte of data. This transmission method can send and receive data normally through the ratio of the baud rate and the clock even if the sending and receiving clocks are different.

[0042] Furthermore, the three-wire MLVDS includes a CP signal, a CLK signal and a DATA signal.

[0043] Furthermore, the high-speed data transmission channel has a transmission rate of 200Mbps.

[0044] For the present invention:

[0045] The present invention provides a high-speed and low-speed hybrid cable communication protocol, which can transmit high-speed data and low-speed data in the same cable at the same time, and the high-speed data and the low-speed data do not interfere with each other. The key innovation of the protocol is that it adopts MLVDS technology and transmits high-speed data and low-speed control data respectively through the combination of three-wire MLVDS and one-wire MLVDS. Its block diagram is shown in Figure 1 shown.

[0046] 1. The architecture of this protocol includes two main transmission paths

[0047] High-speed data transmission path: Use three-wire MLVDS for high-speed data transmission, such as Figure 2 The three-wire MLVDS can provide high-bandwidth data transmission and support a transmission rate of up to 200Mbps. It is used to transmit data that requires high-speed processing, such as video, images, radar signals, etc.

[0048] Low-speed data transmission path: One-wire MLVDS is used for low-speed data transmission, such as Figure 3 As shown in the figure, since the data transmission rate requirement of control instructions is low, the one-wire MLVDS can effectively transmit these low-speed data, such as system control commands, status feedback, etc.

[0049] 2. Data transmission mechanism

[0050] High-speed data transmission: During high-speed data transmission, the three-wire MLVDS signal remains stable, supporting the continuous transmission of high-speed data streams. The data of this channel will not be disturbed by low-speed data transmission.

[0051] Low-speed data transmission: Low-speed control data is transmitted through a one-wire MLVDS channel, which does not affect the transmission of high-speed data. At the same time, the low-speed data transmitted through a one-wire system uses an independent protocol, which is specifically responsible for control instructions and system management information.

[0052] 3. Data isolation and synchronization

[0053] Isolation mechanism: The protocol of the present invention ensures the physical isolation of high-speed data from low-speed data. Although they share the same cable, the two signals are transmitted through different MLVDS channels to ensure that they do not interfere with each other.

[0054] Synchronization mechanism: In order to ensure that high-speed and low-speed data can be transmitted synchronously during the transmission process, the main control unit strictly controls the timing of the two data transmission channels. The transmission of high-speed data and low-speed data can be carried out in parallel at the same time, but in actual transmission, their timing and data will not conflict.

[0055] 4. Protocol Structure

[0056] During data transmission, high-speed data and low-speed data have different protocol frame structures:

[0057] High-speed data frame structure: including start bit, data payload, check bit and stop bit. High-speed data frame is designed for shorter time slot transmission to ensure data continuity and stability.

[0058] Low-speed data frame structure: contains simple control instruction data frames. The transmitted data is smaller, but it also includes start bit, data bit and stop bit to ensure the correctness of data transmission.

[0059] The key points of the present invention are:

[0060] 1. Multi-channel data transmission mechanism

[0061] The core innovation of the present invention is to realize the transmission of high-speed data and low-speed data respectively through the combination of three-wire MLVDS and one-wire MLVDS. The two are isolated and transmitted through different physical channels, ensuring that high-speed data and low-speed data do not interfere with each other when they are transmitted simultaneously in the same cable. This multi-channel data transmission mechanism effectively avoids the interference of low-speed data on high-speed data transmission in traditional communications.

[0062] ●High-speed data channel: High-speed data transmission is carried out through three-wire MLVDS, ensuring stable transmission of high-bandwidth and large data streams.

[0063] ●Low-speed data channel: One-wire MLVDS is used for low-speed control data transmission to ensure that control instructions do not affect the transmission quality of high-speed data.

[0064] 2. Data transmission timing and synchronization mechanism

[0065] In order to ensure that the transmission of high-speed and low-speed data does not conflict, the present invention designs a strict timing control and data synchronization mechanism. The main control unit coordinates the transmission timing of high-speed data and low-speed data to ensure that both can be carried out in parallel at the same time without conflict or delay.

[0066] ● Timing synchronization of high-speed and low-speed data: The main control module manages the data synchronization of the two transmission channels, and ensures efficient synchronization of the two data during transmission through the design of clock signals and protocol frame structures.

[0067] ●Protocol layer design: High-speed data and low-speed data use different protocol frame structures to ensure data integrity and transmission correctness.

[0068] 3. Physical isolation and data integrity

[0069] High-speed data and low-speed data are transmitted in an isolated manner at the physical level, avoiding data conflicts or transmission errors caused by sharing the same channel. This technology ensures that the two types of data will not affect each other when transmitted in the same cable.

[0070] ●Data frame isolation: Different data types are transmitted using different signal channels, ensuring the stability and integrity of the data.

[0071] ●Signal isolation and reliability: Two independent transmission channels ensure that high-speed and low-speed signals will not interfere with each other when transmitted in the same cable, thereby improving the reliability of data transmission.

[0072] 4. Simplified wiring and hardware design

[0073] Through MLVDS technology, high-speed and low-speed data transmission is achieved in the same cable, simplifying the hardware design and wiring scheme. Compared with the traditional multi-wire system, it reduces the number of lines, improves wiring efficiency, and reduces system costs.

[0074] ●Reduce wiring complexity: By sharing the same cable for transmission, the complexity of hardware interfaces and wiring is reduced, reducing design and production costs.

[0075] ●Simplified interface circuit: Through the simplified design of MLVDS, there is no need for complex electrical isolation and drive modules, which reduces the complexity of hardware design.

[0076] 5. Widely used protocol design

[0077] This protocol is particularly suitable for scenarios that require simultaneous processing of high-speed data and low-speed control instructions, such as industrial control, automation systems, vehicle communication systems, and sensor networks. It can simultaneously transmit high-speed data and send low-speed control commands on the same cable, and is widely applicable to various real-time systems that require high reliability and low latency.

[0078] Through innovations in multi-channel data transmission mechanism, data timing synchronization control method, protocol frame structure design and signal isolation technology, the present invention provides a high-low speed hybrid cable communication protocol, the core technical points of which can significantly improve the stability and reliability of data transmission and optimize hardware design and wiring schemes. The above technical innovations and protection points ensure the advantages of the present invention in complex communication environments and provide an efficient, stable and low-cost communication solution for related applications.

[0079] It is worth mentioning that the technical features such as cables involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0080] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-low speed hybrid cable communication protocol, characterized in that: It includes a main control module and a sub-control module, and an isolated high-speed data transmission channel and a low-speed data transmission channel are provided between the main control module and the sub-control module, wherein: For the high-speed data transmission channel, a three-wire MLVDS is used for high-speed data transmission, so as to transmit the data including video, image and radar signal of the main control module to the sub-control module at high speed; For the low-speed data transmission channel, a one-wire MLVDS is used to transmit low-speed data, so as to transmit the sending control instruction of the main control module to the sub-control module and transmit the feedback information of the sub-control module to the main control module.

2. A high-low speed hybrid cable communication protocol according to claim 1, characterized in that: During data transmission, the high-speed data transmission channel and the low-speed data transmission channel have different protocol frame structures: For the high-speed data frame structure of the high-speed transmission channel: including the start bit, data payload, check bit and stop bit, the high-speed data frame is designed to be transmitted in a shorter time slot to ensure the continuity and stability of the data; For the low-speed data frame structure of the low-speed transmission channel: it contains the control instruction data frame, the transmitted data is smaller, but it also includes the start bit, data bit and stop bit to ensure the correctness of data transmission.

3. A high-low speed hybrid cable communication protocol according to claim 2, characterized in that: The main control module manages the data transmission of the high-speed data transmission channel and the low-speed data transmission channel, and ensures the efficient transmission of the two types of data through the design of clock signals and protocol frame structures.

4. A high-low speed hybrid cable communication protocol according to claim 1, characterized in that: The three-wire MLVDS includes CP signal, CLK signal and DATA signal.

5. A high-low speed hybrid cable communication protocol according to claim 1, characterized in that: The transmission rate of the high-speed data transmission channel is 200Mbps.

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