A method for realizing real-time transaction data exchange in multi-master bus network communication

A bus network and transaction data technology, applied in the bus network, data exchange through path configuration, etc., can solve problems such as bus deadlock, system real-time performance, poor reliability, and poor system reliability, so as to improve reliability and real-time performance strong effect

Inactive Publication Date: 2014-10-08
王向东
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Problems solved by technology

[0003] 1. Data exchange adopts asynchronous exchange, resulting in poor real-time performance and reliability of the system
[0004] 2. If there is a problem with individual nodes in the network, it is easy to cause the bus to be in a "deadlock" state, resulting in poor system reliability

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  • A method for realizing real-time transaction data exchange in multi-master bus network communication
  • A method for realizing real-time transaction data exchange in multi-master bus network communication
  • A method for realizing real-time transaction data exchange in multi-master bus network communication

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] The invention proposes a method for realizing real-time transaction data exchange in multi-master bus network communication.

[0042] figure 1 As shown, it is a network diagram of a multi-master bus network communication real-time transaction data exchange implementation method. It is a CAN bus mainly composed of multiple Internet of Things terminal devices, and sends a service request to the host computer through CAN to the state network. .

[0043] figure 2 Shown is a technical architecture diagram of multi-master bus network communication real-time transaction data collection service. By dividing the data collection service of the present invention into two parts for processing, the speed of data collection and exchange is increased. These two parts are: control flow and data flow,

[0044] The control flow is respons...

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Abstract

The invention discloses a multi-master bus network communication real-time transaction data exchange realization method, which uses a CAN bus composed of multiple Internet of Things terminal devices as nodes, and sends a data acquisition service request to an upper computer through CAN to Ethernet. Each node in the network competes to send data to the CAN bus by adopting a bit-by-bit arbitration method with a lossless structure according to the CAN bus access priority. The data collection service adopts the high-efficiency network I / O model - IOCP, and its architecture is divided into two parts for processing, namely control flow and data flow, to increase the speed of data collection and exchange.

Description

technical field [0001] The invention relates to the application of real-time transaction data exchange processing in a multi-master mode for an Internet of Things terminal in the one-card field of a smart campus and a digital campus. Background technique [0002] In recent years, with the further acceleration of the information construction of Internet of Things terminals and one-cards, smart cities, smart campuses and digital campus one-cards have been widely used. However, in today's Internet of Things terminals, all manufacturers use RS485 or RS422 for IoT terminal bus communication devices. However, due to the limitations of the RS485 or RS422 bus itself, the communication method can only be polled by the master station. In this way, data transmission can only be uploaded asynchronously, so that such IoT terminals cannot go to the data center for real-time authentication during transactions or identity authentication, resulting in poor real-time performance and reliabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40
Inventor 王向前王向东
Owner 王向东
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