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Data transmission method and device

A data transmission method and data technology, applied in the field of network communication, can solve problems affecting real-time communication and increasing communication delay, so as to reduce impact and ensure communication efficiency

Active Publication Date: 2018-06-22
CSR CHENGDU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of a lot of packet loss / frame loss at the physical layer, this method requires more retransmissions. Since ACK information needs to be waited each time, the communication delay will undoubtedly be increased and the real-time performance of communication will be affected.

Method used

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Embodiment Construction

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Embodiments of the invention are some embodiments, but not all embodiments.

[0020] Typically, industrial applications often have clear requirements on data reliability and delay, and the present invention can be applied to industrial data transmission based on 802.11 wireless networks. Since the wireless transmission method is transmitted in free space, the communication quality is greatly affected by the environment, especially in industrial application scenarios. Therefore, it is usually difficult to send data frames in wireless data successfully at one time, and the reliability is low; in order to improve communication...

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Abstract

The invention provides a data transmission method and device. The data include one or multiple data frames. The method comprises the following steps: acquiring communication requirement parameters ofservices to which to-be-transmitted data belong; calculating the number of retransmission groups of each data frame and the number of data frame copies of each retransmission group according to the communication requirement parameters; according to the calculated number of the retransmission groups of each data frame and the number of the data frame copies of each retransmission group, generatinga retransmission group for each data frame; and transmitting the generated retransmission group. According to the data transmission method provided by the invention, during wireless network data transmission, the number of the retransmission groups of the data frames and the number of the data frame copies in the retransmission groups are determined according to the communication requirements of services, confirmation information is waited after one retransmission group is transmitted, so that the time for waiting for the confirmation information is saved for a data transmission process, the communication time delay requirement is considered while the data transmission reliability is improved.

Description

technical field [0001] The invention relates to network communication technology, in particular to a data transmission method and device. Background technique [0002] The wireless communication technology based on the 802.11 protocol cluster has penetrated into all aspects of people's life and work, but compared with the wired network, the reliability of wireless network transmission is low, especially in industrial applications, where the communication environment is harsh and packet loss is more serious . At present, in order to improve the reliability of the communication system, data retransmission is usually used, that is, for data including multiple data frames, wait for ACK information after sending each data frame, if no ACK information is received within the timeout period, Then it is considered that the sending has failed, and the data frame is sent again until the sending is successful. In the case of a lot of packet loss / frame loss at the physical layer, this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04W28/06H04W28/02
CPCH04L1/1607H04L1/18H04W28/0231H04W28/0236H04W28/065
Inventor 曲峰张永战祁树壮张吉涛
Owner CSR CHENGDU
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