Low-power mac layer communication method based on traffic adaptation in wireless sensor network

Abstract

The invention discloses a low power consumption MAC communication method based on flow self-adaption in a wireless sensor network. The method comprises the following steps: when a sending node has data to be sent, recording a data retransmission time, and comparing the data retransmission time with a set data retransmission threshold; when the data retransmission time is smaller than the data retransmission threshold, entering an asynchronous phase, comprising: the sending node packets the data to be sent, encodes the data and adds a destination address of the node on the header of the encoded packet to serve as a preamble to continuously send a preset sending time; and after receiving the encoded packet, a receiving node judges the destination address in the header of the encoded packet; when the data retransmission time is larger than the data retransmission threshold, entering a synchronous phase, comprising: the sending node sends a RTS frame to serve as the preamble, and after receiving the RTS frame, the receiving node judges the destination address in the frame. The method disclosed by the invention is used for selecting different sleeping mechanisms according to the communication traffic in the network, thereby having great superiority of reducing the network power consumption, greatly improving the network throughput and greatly shortening the network delay.

Description

technical field [0001] The invention relates to a MAC layer communication method in a wireless sensor network, in particular to a traffic self-adaptive low-power MAC layer communication method, and belongs to the technical field of wireless sensor networks. Background technique [0002] The wireless communication module of the sensor node includes four states: sending state, receiving state, listening state and dormant state. The energy consumed per unit time decreases in the above order: the wireless communication module consumes the most energy in the sending state, and the least energy in the dormant state. The energy consumption in the receiving state and listening state is similar but slightly smaller than that in the sending state. Therefore, in order to reduce the power consumption of the node, when there is data to send and receive, the node turns on the wireless communication module to send or listen, if there is no data to send and receive, the node controls the wi...

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a low-power MAC layer communication method based on traffic self-adaptation in the wireless sensor network, and solve the problem that the existing wireless sensor network cannot perform communication according to the communication flow. The problem of adjusting the sleep mechanism in real time

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