Data transmission method based on capture effect in wireless sensor network

Abstract

The invention discloses a data transmission method based on a capture effect in a wireless sensor network. The data transmission method mainly solves the problem that in the prior art, the throughput capacity is low under the condition that a large number of data burst. The method comprises the steps that 1, a receiver broadcasts a competition beacon group in a wireless channel where the receiver works; 2, after a competitor receives the competition beacon group, a competition group is broadcast; 3, the receiver decodes signals of the competitor through the capture effect and broadcasts a token beacon group, wherein the node allowed to transmit data and transmission time duration are assigned in the token beacon group; 4, after the competitor receives the token beacon group, whether the competitor is a node allowed to transmit data or not is judged, if the competitor is the node, a token is obtained and data are transmitted to the receiver within a distributed time period, and if the competitor is not the node, the token is not obtained and data are not transmitted. Through the token distribution mechanism and the capture effect, the utilization rate of the channel and the throughput capacity for data transmission are improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a data transmission method which can be used in a wireless sensor network. Background technique [0002] A basic function of a wireless sensor network is to efficiently transmit the data collected by all sensor nodes in the network to the base station or sink node. This mode of transferring data from multiple nodes to one node is called aggregation. In many sensor network applications, sensor nodes usually transmit data to the base station after discovering an event, resulting in a burst of large amounts of data, and multiple nodes simultaneously send data to a receiving node. Since wireless transmission is based on a shared channel, when a node sends a packet depends on the medium access control protocol used, that is, the MAC protocol. There are two main types of MAC protocols at present: carrier sense multiple access control protocol CSMA and time division ...

AI Technical Summary

Problems solved by technology

The advantage of the TDMA protocol is that it can obtain higher throughput, but it requires time synchronization of nodes

In addition, its scheduling overhead is large, and it is not suitable for situations with a large number of data bursts

[0003] Since wireless transmission is based on shared channels, most of the currently designed MAC protocols assume that when multiple nodes send data to a receiving node at the same time, conflicts will occur, and the receiver cannot correctly decode the data.

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