2020年5月7日，工信部发布了《工业和信息化部办公厅关于深入推进移动物联网全面发展的通知》，明确提出关于建立移动物联网相关要求。要加快推动2G/3G物联网业务迁移转网，建立NB-IoT(窄带物联网)、4G(含LTE-Cat1，即速率类别1的4G网络)和5G协同发展的移动物联网综合生态体系，在深化4G网络覆盖、加快5G网络建设的基础上，以NB-IoT满足大部分低速率场景需求，以LTE-Cat1(以下简称Cat1)满足中等速率物联需求和话音需求，以5G技术满足更高速率、低时延联网需求。

On May 7, 2020, the Ministry of Industry and Information Technology issued the "Notice of the General Office of the Ministry of Industry and Information Technology on Promoting the Comprehensive Development of the Mobile Internet of Things", which clearly put forward relevant requirements for the establishment of the mobile Internet of Things. It is necessary to accelerate the promotion of 2G/3G Internet of Things business migration and network transformation, and establish a comprehensive mobile Internet of Things ecosystem of NB-IoT (Narrowband Internet of Things), 4G (including LTE-Cat1, that is, 4G network of rate category 1) and 5G. On the basis of deepening 4G network coverage and accelerating 5G network construction, NB-IoT is used to meet the needs of most low-rate scenarios, LTE-Cat1 (hereinafter referred to as Cat1) to meet medium-rate IoT and voice requirements, and 5G technology to meet more High-speed, low-latency networking requirements.

Cat.1全称LTE UE-Category 1。顾名思义，Cat.1是4G通信LTE网络下用户终端类别的一个标准。3GPP组织制定LTE标准的时候用Cat.1～20来衡量用户终端设备的无线性能，也就是划分终端速率等级。其中Cat.1上行峰值速率5Mbit/s，下行峰值速率10Mbit/s，定位于面向物联网应用市场的一个类别。全球移动物联网技术标准和产业格局的演进趋势的推动下，Cat.1的各项优势逐渐显现。Cat.1芯片及模组的不仅成熟度和集成度更高，模组的硬件架构也更简单、外围硬件成本更低，还能够在短时间内形成规模效应。此外，随着2G/3G的加速退网，国内三大运营商也开始积极引导行业用户使用Cat.1终端模组。自此，新晋“网红”Cat.1诞生。

Cat.1 is called LTE UE-Category 1. As the name suggests, Cat.1 is a standard for user terminal categories under 4G communication LTE networks. When the 3GPP organization formulates the LTE standard, Cat.1-20 is used to measure the wireless performance of user terminal equipment, that is, to divide the terminal rate level. Among them, Cat.1 has an uplink peak rate of 5Mbit/s and a downlink peak rate of 10Mbit/s. It is positioned as a category facing the IoT application market. Driven by the evolution of global mobile Internet of Things technology standards and industrial structure, the advantages of Cat.1 have gradually emerged. Cat.1 chips and modules not only have higher maturity and integration, the module hardware architecture is also simpler, the peripheral hardware cost is lower, and the scale effect can be formed in a short time. In addition, with the accelerated withdrawal of 2G/3G, the three major domestic operators have also begun to actively guide industry users to use Cat.1 terminal modules. Since then, the new "net celebrity" Cat.1 was born.

如上图三种速率的应用场景都有对应的蜂窝模块满足要求，那为什么还需要 NB-IOT、Cat.1、eMTC 来支撑呢?主要有以下几个原因：

1、2G/3G在未来已成退网的必然，基于4G/5G(NB-IoT+4G+5GNR)的物联网技术将担当起开启万物互联的大任。

2、NB-IOT 无法满足中速率及移动特性需求，eMTC 的发展不尽如人意，国内产业生态也没跟上，Cat.1成为不二选择。

3、可以无缝接入现有 3G/4G 网络。

As shown in the figure above, the application scenarios of the three rates have corresponding cellular modules that meet the requirements. Why do you need NB-IOT, Cat.1, and eMTC to support it? The main reasons are as follows:

1, 2G/3G has become an inevitable withdrawal from the network in the future, and the IoT technology based on 4G/5G (NB-IoT+4G+5GNR) will take on the task of opening the Internet of Everything.

2. NB-IOT cannot meet the needs of medium speed and mobile characteristics. The development of eMTC is not satisfactory, and the domestic industrial ecology has not kept up. Cat.1 has become the best choice.

3. Can seamlessly access the existing 3G/4G network.

Cat.1 和 NB-IoT 作为新基建的重要组成部分，在面向智能家居、智慧农业、工业制造、能源表计、消防烟感、物流跟踪、金融支付等重点领域，必将不断扩展。

Cat.1 and NB-IoT, as an important part of the new infrastructure, will continue to expand in key areas such as smart home, smart agriculture, industrial manufacturing, energy meters, fire smoke detection, logistics tracking, and financial payments.

Following the mass marketization of NB-IoT series electric energy meter products, Wuhan Radarking Electronics Corp. launched the Cat.1 series electric energy meter products in November 2020.

序号No.	名称NAME	型号MODEL	图片PHOTO	备注REMARK
1	单相通信模块 Single phase communication module	RDK-CAT1/DWA
2	三相通信模块 Three phase communication module	RDK-CAT1/SWA
3	单相智能表 Single phase smart electric meter	DDZY150-M/CAT1
4	单相负载识别智能表(一进三出) Single-phase load identification smart electric meter (ONE-IN and THREE-OUT)	DDZY150-M/CAT1
5	三相电能表 Three phase electric meter	DTS150/BRC1
6	三相智能表 Three phase smart electric meter	DTZY150-M/CAT1
7	集中器(RS485->CAT1) Concentrator(RS485->CAT.1)	DJGL12-RDK150/SC1