Wireless sensor network beam forming transmission array node selecting method

Abstract

In the field of distributed wireless sensor network long-distance communication, the communication distance and the energy of a single node are limited, a multi-hop mode is used, bit error rate is high, and time delay is large. Accordingly, the invention discloses a cooperative communication mode of wireless sensor network beam forming transmission and a node selecting method. First, the smallest node number needed for forming a virtual antenna array is determined; then an ideal antenna direction picture of the array is determined, according to the ideal direction picture, the conditions such as array shapes and node space distance are determined, and nodes which accord with the conditions are selected to form the antenna array; and finally the nodes are managed, array nodes are coordinated, time sequence is unified, and data are sent in a combination mode in a beam forming manner. According to the method, the problem that time delay is too high, and energy loss is too large due to traditional wireless sensor network long-distance multi-hop communication can be effectively avoided, communication success probability is improved, and network lifetime is prolonged.

Description

technical field [0001] The invention belongs to the technical field of wireless communication and wireless sensor network, and in particular relates to a method for selecting a beamforming transmission array node of a wireless sensor network. Background technique [0002] With the development of science and technology, the integration of the physical world and the information world has become a hot issue that people generally pay attention to. How to effectively realize the collection, processing, transmission and storage of physical data is the key to the popularization of Internet of Things technology, and among them The data acquisition problem is a critical step in the entire information flow. [0003] Wireless Sensor Networks (Wireless Sensor Networks, WSN) is a network composed of a large number of cheap micro-sensor nodes deployed in the monitoring or data collection area. It forms a multi-hop self-organizing network system through wireless communication. Its purpose ...

AI Technical Summary

Problems solved by technology

[0005] In addition to the energy constraints of the nodes in the wireless sensor network, their communication distance, communication reliability and communication effectiveness are greatly limited. The transmission capability of a single node is difficult to meet the requirements of long-distance communication, and the transmission reliability is difficult. Guaranteed, high bit error rate

In the traditional wireless sensor network, although the multi-hop transmission method effectively solves the problem of long-distance communication, the excessively long transmission delay and the increase in the probability of communication failure are not suitable for applications with high real-time requirements such as disaster monitoring and battlefields. is unacceptable

At the same time, the multi-hop forwarding method will cause the energy consumption of the aggregation node to be too fast and die prematurely, and the data cannot be sent to the aggregation node and the base station, thereby reducing the performance of the network and shortening the network lifetime

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