Efficient NB-IoT and GNSS chipset solution

2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS) Pub Date : 2019-11-01 DOI:10.1109/ICECS46596.2019.8965122

Woo-Hyoung Choi, Ivan Galkin, Seokwon Lee, Jihoon Park, Jongjin Lee, Dongyun Kim

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引用次数: 1

Abstract

In this paper, an efficient GNSS (Global Navigation Satellite System) integration to NB-IoT chipset and its solution for constrained tracking scenario (i.e. time sharing between NB-IoT and GNSS) are explained. Considering the infrequent data transfer to network in the target application of NB-IoT, it makes sense to constrain tracking scenario in order to optimize system architecture in NB-IoT SoC (system on chip) for low-cost GNSS feature support. For efficient SoC design architecture, NB-IoT and GNSS may share main hardware resources such like CPU, memory, and system peripherals. However, the time sharing of CPU for such hardware environment requires additional software solution to manage context save/restore, firmware binary switch, and data transfer between NB-IoT and GNSS. In NB-IoT, long period of eDRX (extended DRX) and PSM (Power Save Mode) modes allow enough spare time for GNSS to run exclusively on the shared resources without missing any paging request during location search operation by GNSS.

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高效的NB-IoT和GNSS芯片组解决方案

本文阐述了一种高效的GNSS(全球导航卫星系统)与NB-IoT芯片组的集成方案及其在受限跟踪场景(即NB-IoT与GNSS时间共享)下的解决方案。考虑到NB-IoT目标应用中数据传输到网络的频率较低，为了优化NB-IoT SoC(片上系统)中的系统架构，以支持低成本的GNSS功能，对跟踪场景进行约束是有意义的。为了实现高效的SoC设计架构，NB-IoT和GNSS可能会共享CPU、内存、系统外设等主要硬件资源。然而，这种硬件环境下CPU的分时需要额外的软件解决方案来管理上下文保存/恢复、固件二进制切换以及NB-IoT和GNSS之间的数据传输。在NB-IoT中，长时间的eDRX (extended DRX)和PSM (Power Save Mode)模式使得GNSS有足够的空闲时间在共享资源上独占运行，而不会在GNSS的位置搜索操作中丢失任何分页请求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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