NB-IoT terminal positioning system and method

Abstract

The invention provides an NB-IoT (Narrow Band Internet of Things) terminal positioning system and method, which are used for positioning an NB-IoT terminal, and are characterized in that the NB-IoT terminal positioning system comprises: at least one NB-IoT terminal which comprises an application processor and a modem; an NB-IoT network which comprises a plurality of NB-IoT base stations, wherein the network signal coverage of each NB-IoT base station forms a plurality of cells; a cloud server wihch is in wired connection with an NB-IoT network. The cloud server comprises a base station information storage unit, a data decompression unit, a time delay estimation unit, a terminal positioning calculation unit and a positioning output unit. The cloud server performs time delay estimation according to the OFDM symbol acquired by the modem, obtains the time delay estimation difference RSTD between different cells and a service cell,and calculates longitude / latitude and confidence informationof the terminal position by using the time delay estimation difference, the base station position information, the base station synchronization time difference and the like as terminal position information of the NB-IoT terminal, and finally outputs the terminal position information.

Description

technical field [0001] The invention belongs to the technical field of Internet of Things positioning, and in particular relates to a NB-IoT terminal positioning system and method. Background technique [0002] With the development of fifth-generation mobile communication technology (5G) and artificial intelligence technology, more and more devices need to be connected to the network. In 2020, the global large-scale commercial use of 5G and China's "new infrastructure" will start, and the era of Internet-of-Things (IoT) is coming. At present, the Internet of Things has been applied in urban management, traffic management, warehousing and logistics, energy and power, etc., and is widely involved in all aspects of national economy and social life. According to the global IoT market report released by GSMA in 2019, the number of global IoT connections will reach 25 billion by 2025, and its market size will reach US$1.1 trillion. [0003] The Internet of Things mainly transmit...

AI Technical Summary

Problems solved by technology

[0009] Therefore, it is difficult for current NB-IoT terminals to meet user positioning requirements, improve positioning performance indicators, overcome the impact of NLOS and multipath on positioning, and achieve low power consumption, low cost, large connections, and wide coverage of NB-IoT terminals. and other system requirements, especially when the operator has not activated the NB-IoT positioning function

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