Self-adaptive communication method in wireless sensor network cluster

Abstract

The invention relates to a self-adaptive communication method in a wireless sensor network cluster, which comprises a request stage, a synchronous stage and a sleeping stage. The method comprises the following steps: firstly, calculating the size of a contention window in the time by ordinary nodes in the cluster according to the number of data packs of a current buffer region; then, contending signal channels in a carrier wave interception mode, and sending the reservation pack ITS to a cluster head node; and answering reservation confirming pack ATS to the ordinary nodes in the cluster for confirmation after the cluster head node receives the ITS. In the synchronous stage, the cluster head node sends synchronous packs to the ordinary nodes in the cluster for notifying the number of the data packs needing to be sent in the time and the time information of the cluster head per se. Then, the ordinary nodes succeeding the contention continuously send a plurality of data packs to the cluster head node in the sleeping stage, and other nodes enter the sleeping mode for reducing the energy consumption. The method has the advantages that the nodes with large data load can have greater priority for sending the data, so accumulation of data packs can be effectively solved, and the transmission throughput rate is improved, and the energy consumption is reduced.

Description

technical field [0001] The present invention relates to the field of wireless networks, in particular to the field of wireless sensor network protocol design, and specifically provides an adaptive communication method in a wireless sensor network cluster, although the given features can be applied to other network designs. Background technique [0002] Wireless sensor networks are usually multi-hop self-organizing networks composed of many resource-constrained nodes, and have a wide range of applications in many fields such as environmental monitoring, military management, industrial control, and medical systems. Due to the limited energy and processing capabilities of a single node in a wireless sensor network, the nodes usually need to sense, collect and process information in a collaborative manner and send it to the sink node, so this type of network has high performance in terms of energy consumption, delay, and reliability. requirements. [0003] In the specific appli...

AI Technical Summary

Problems solved by technology

Due to the difference in the amount of data to be sent by each ordinary node in the cluster, the node with a large number of data packets in the node data buffer needs to send the data to the cluster head node in time, and the uniform channel access probability cannot make the number of data packets More nodes can enjoy priority sending rights

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