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GSM(Global System for Mobile Communication,全球移动通信系统)是当前应用最为广泛的移动电话标准。NB-Io T(Narrow band Internet of Things,窄带物联网)是面向低速率、低时延、超低终端成本、低功耗、海量终端连接的窄带蜂窝物联网技术,其中:覆盖增强是该技术的重要设计目标,NB-Io T要求在GSM基础上增强20d B,MCL达164d B。因此,本文在介绍GSM和NB-Io T的信道后,对两者的覆盖能力进行分析和比较。
GSM (Global System for Mobile Communication) is currently the most widely used mobile phone standard. Narrowband Internet of Things (NBIoT) is a narrowband cellular Internet of Things (IoT) technology targeted at low-rate, low-latency, ultra-low end-cost, low power consumption, The important design goal of NB-Io T requires to enhance 20d B and MCL up to 164d B on the basis of GSM. Therefore, after introducing the GSM and NB-Io T channels, this paper analyzes and compares the coverage of the two.