Data communication method and device, computer terminal and computer readable storage medium

Abstract

The invention relates to a data communication method and device, a computer terminal and a computer readable storage medium. According to the data communication method, a current node sends a data query instruction to a gateway and all remaining nodes in a local area network in a data broadcasting mode, so that the remaining nodes receiving the data query instruction enter a timing waiting state;the current node judges whether a query confirmation instruction returned by the gateway is received within a preset timing time; if so, the current node judges that the channel is in an idle state and sends the target data to the gateway, wherein the target data comprises identity identification information corresponding to the gateway; when target data transmission is completed, the current nodesends a transmission ending instruction to the gateway in the local area network and all the remaining nodes in the data broadcasting mode again so as to enable the remaining nodes receiving the transmission ending instruction to quit the timing waiting state. The exclusiveness of the channel is declared to other remaining nodes by broadcasting the query command before the data is sent, so that the communication efficiency and quality are improved.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a data communication method, device, computer terminal and computer-readable storage medium. Background technique [0002] In the Internet of Things communication network, when multiple nodes or gateways need to send data, in order to avoid the channel being interfered by other remaining nodes, channel assessment will be performed before sending data to determine whether the channel is in an idle state. Generally, the idle channel assessment CCA (Clear Channel Assessment (idle channel assessment) method, through channel energy and waveform identification, based on physical carrier sensing, initially judges whether there are other nodes sending data on the channel. If it is detected that the channel energy reaches a certain threshold, it is considered that the current channel is busy, and the node to send data needs to delay sending data. [0003] However, when communica...

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Problems solved by technology

[0003] However, when communicating through Sub-1G radio frequency, the signal energy when sending data often fluctuates to a certain extent, and the radio frequency signal is easily interfered by the surrounding environment. Only using CCA carrier sense may have errors, which may easily lead to false detection , which in turn leads to channel data conflicts between multiple nodes during data communication

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