Optical Fiber Sensor Internet of Things Throughput Maximization Relay Node Selection

The relay node is the transit center of the sensor Internet of Things communication, and the rationality of its selection is of great significance to ensure the stability of the Internet of Things communication and information throughput. This paper proposes a method of selecting relay nodes based on optical fiber to maximize the throughput of the sensing Internet of Things. By building a sensor Internet of Things model, find the main lobe in the target fiber sensor base station, and identify the signal transmitted by the light source node. Select the relay nodes that can transmit the known optical channel status to other nodes in the candidate nodes, remove the nodes that cannot maximize the throughput, obtain the average received signal to noise ratio of the sensor Internet of Things based on statistical independent distribution, and select the appropriate fiber sensor antenna to complete the relay node selection. Simulation results show that the outage probability of the proposed method approaches zero when the number of nodes is 22;When the power of the light source node is 30 dBm, the network throughput reaches 98%.

I. Introduction

The Internet of Things ^[1]–[2] uses the Internet as a link to exchange and communicate information among sensors, machines, people, etc. through various ways, so as to establish a close relationship between each other, build an intelligent information network, improve people's ability and level of information exchange, and make communication more convenient. As a tool for receiving and outputting information, the optical fiber sensor^[3]can meet the needs of information transmission, information processing and other aspects of the Internet of Things. Driven by the Internet of Things, the application scope of optical fiber sensors in temperature, gravity, photoelectric, sound, displacement, vibration and other environmental detection is expanding day by day, especially in the harsh environment, it can work safely and efficiently, which has solved many technical problems in industry for many years, and has huge market demand. Optical fiber sensors are used in the Internet of Things, in which the relay node, as a signal relay station, can integrate and amplify data so that the signal is not distorted. The rationality of its selection and layout are of great significance for improving the network throughput performance.