Multiple-input-multiple-output-based wireless network sensor cluster head random-selection interaction method

Abstract

The invention discloses a multiple-input-multiple-output-based wireless network sensor cluster head random-selection interaction method. A cluster head node is randomly selected by adopting a low-power consumption adaptive clustering hierarchy protocol method in a wireless sensor network; after a cluster is established, a message of the node enters a channel encoder for encoding; an output data stream of the encoder is split into N data streams with the same length by a serial / parallel converter; after being modulated, the N data streams are transmitted by N antennae; the node at a receiver receives the message by M antennae; and the receiving antennae of each path simultaneously detect received signals by a matched filter to recover raw data. By the method, the energy load of the whole network is uniformly allocated to each sensor node, and the aims of reducing network energy consumption and increasing the total time to live of the network are fulfilled.

Description

technical field [0001] The present invention combines the expansion of the multiple-input multiple-output technology with the low-power adaptive cluster layered protocol method in the wireless sensor network, and mainly uses multiple transmitting and multiple receiving antennas to resist channel fading, increase network channel capacity, and The method for evenly distributing energy loads to each sensor node belongs to the application field of wireless sensor network, analog circuit technology and communication principle technology. Background technique [0002] Wireless sensor network is a new science and technology network, the earliest research comes from the US military. A wireless sensor network is an intelligent dedicated network that is composed of a large number of sensor nodes with specific functions that transmit information to each other through self-organized wireless communication, and cooperate to complete specific functions. It integrates sensor technology, e...

AI Technical Summary

Problems solved by technology

[0006] The cluster heads of the traditional wireless sensor network are fixed, and the energy consumption of the cluster heads is larger than that of ordinary nodes, which will cause the energy of the cluster head nodes to be exhausted prematurely, and make the network prematurely fail

[0007] 2. Deficiencies in the field of environmental monitoring and protection

This will cause the loss and inaccuracy of the received data, and the detection and evaluation of the environment will produce errors or inaccuracies.

[0009] 3. Insufficient application in the military field

The amount of data to be collected and transmitted by these sensors is relatively large, and the environment in which the sensors are placed is relatively harsh, and there may be interference from other signals. In this environment, sensor nodes cannot avoid movement, and this movement will Cause time variation of the channel and affect the transmission of messages

The information to be detected by these sensors is very important, and the requirements for the real-time and accuracy of the information are very high. Inaccurate information may cause the failure of the mission or even the failure of the war.

[0011] In short, the traditional wireless sensor network node communication method cannot guarantee that sensor nodes can transmit data accurately and reliably and provide sufficient channel capacity in harsh or interfering environments.

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