Frequency management method and system for low-power wide-area network based on broadcast and television frequency bands

Abstract

The invention provides a frequency management method and system for a low-power wide-area network based on broadcast and television frequency bands. Periodic sweep frequency detection is carried out on a preset frequency band range by a spectrum sensing unit; a spectrum management unit is informed of a spectrum state; a different-frequency networking mode is employed among gateways of the low-power wide-area network; a frequency band range is dynamically adjusted according to a spectrum environment state monitored by the spectrum sensing unit; and the spectrum management unit is informed of updating spectrum utilization information in real time. According to the method and the system, the interference resulting from the same frequency between different Internet of things services is reduced to a great extent; the coexistence of an Internet of things service and a broadcast and television service is realized; and the good user experience and a high-efficiency spectrum utilization rate are provided.

Description

technical field [0001] The invention relates to the field of low-power wide-area Internet of Things, in particular to a frequency management method and system of a low-power wide-area network based on broadcast television bands. Background technique [0002] In 2020, mobile communication technology and industry will enter the fifth-generation communication development stage, when China will reach tens of billions of Internet of Things connections, making the "Internet of Everything" a reality. The evolution from 4G to 5G has promoted the rapid development of the Internet of Things, and also put forward higher requirements for wireless communication technology. Therefore, LPWAN is designed for low-bandwidth, low-power consumption, long-distance, and large-scale connected Internet of Things applications. (Low-power Wide-Area Network, low-power wide-area network) is also rapidly emerging. Among them, LoRa, NB-IOT, Sigfox, ZETA, etc. are typical representatives among them, and ...

AI Technical Summary

Problems solved by technology

[0007] In addition to interference factors to radio and television signals, mutual interference in frequency may also occur between LPWAN services

Although LPWAN can use frequency hopping technology to prevent co-frequency interference to a certain extent, with the continuous expansion of the business capacity of the Internet of Things in the future and the continuous expansion of the deployment range of gateways, it will be difficult to prevent frequency interference between services only by relying on LPWAN technology itself. effective control of the problem

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