A text to understand the Internet of Things wireless connectivity technology eMTC

In 2002, digital communications redefined phones and mobile communications began to take off; in 2010, mobile technology redefined computing; and now we are redefining everything, that is, expanding the value of the Internet border, the Internet of Things. The Internet of Things has a very wide range of applications that can be connected and effectively managed from smart cities such as lighting, parking and transportation; to mobile health including patient diagnosis, patient tracking, various environmental monitoring, home water meters, Remote tracking of meters, gas, etc., to building safety and intelligence, industrial automation control, to verticals and market segments such as retail commerce and asset tracking. At present, there are three kinds of wireless connection technologies about IoT in 3GPP specification, one is NB-IoT (Narrowband Internet of Things), the second is ECGSM and the third is eMTC. ECGSM is based on GSM (2G) technology, let alone talk about NB-IoT we did a detailed introduction, today's protagonist will be eMTC.

eMTC definition

LTE-M, that is, LTE-Machine-to-Machine, is an Internet of Things technology based on LTE evolution, Low-Cost MTC in R12 and LTE enhanced MTC in R13, that is, eMTC. LTE carrier to meet the needs of IoT devices. The eMTC is based on a cellular network and supports peak rates up to 1 Mbps upstream and downstream. The eMTC belongs to the Internet of Things (IoT) rate. Its user equipment can directly access the existing LTE network by supporting 1.4 MHz radio frequency and baseband bandwidth. In the continuous evolution of LTE, the latest eMTC and NBIoT further optimize the system cost, enhance the battery life and extend the coverage. The key capability of eMTC is to support mobility and can be located at a cost of only 25% of the Cat1 chip, which is four times higher than the GPRS rate.

eMTC features

Narrowband LTE one of the most important features. First, the complexity of the system has been greatly reduced, the complexity and cost have been greatly optimized. Second, the power consumption is extremely reduced, battery life increased significantly. Third, the network's coverage is greatly enhanced. Fourth, the density of network coverage is enhanced.

eMTC possesses the basic capabilities of LPWA. The first is broad coverage. In the same frequency band, eMTC has a gain of 15dB over existing networks, which greatly enhances the LTE network's deep coverage capability. The second is the ability to support massive connections. eMTC One sector can support nearly 100,000 connections; Third, lower power consumption, eMTC terminal module standby time up to 10 years; Fourth, lower module costs, large-scale connection will bring the module chip costs The rapid decline, eMTC chip target cost at 1 to 2 dollars.

The evolution of the Internet of Things R13 to R14

R14 opens the 3GPP 5G journey and future 5G applications will cover three broad categories of scenarios: Enhanced Mobile Broadband (eMBB), Mass Communication Machine (mMTC) and Ultra-Reliable Low-latency (eMTC). Among them, the eMBB scenario refers to that based on the existing mobile broadband service scenario, further improvement of the performance such as user experience is mainly pursued by the ultimate communication experience between people. mMTC and eMTC are the application scenarios of the Internet of Things, but their respective focuses are different: mMTC is mainly the information exchange between people and things, and eMTC mainly reflects the communication needs between objects and objects.

From the evolution of 3GPP Release 13 to Release 14, the demand for throughput is not particularly large for networked terminals. For example, in broadcast function, Release 13 can only support unicast and increase in Release 14 Broadcasting (multicast) function; Another example is the positioning function of the upgrade, you can track its location.

The advantages of eMTC technology

By 2018 non-mobile terminals are expected to ship more than 5 billion terminals, the Internet of Things market as a very broad vertical market, the need for a very strong connection support landing, the basic requirements of three points: the connection should be everywhere, all the time ; Also have security assurances; the same time, there must be a very sound, fully optimized an ecosystem. So, the technology of Internet of Things based on LTE is the best candidate scheme, there are NB-IoT and eMTC at present.

Broad coverage of low-power solutions for the Internet there are many choices, there are three ways to carry with a cellular network, the first is based on 2G / 3G / 4G technology, using the same terminal chip carrying mobile phones, and mobile phone users ability The second is a local optimization solution, including eMTC, Cat1, Cat0, etc., which can reduce cost and power consumption and enhance coverage. The third method is NB-IoT.

Take a look at today's LTE market. By April 2016, more than 500 operators in more than 160 countries around the world deployed LTE, and more than 400 manufacturers released over 5,000 LTE-enabled products. With the booming of smartphones in the past few years, LTE has become the mainstream wireless communication technology that is the easiest to get and most easily guaranteed. Compared to the Internet of Things Wi-Fi and Bluetooth technology, LTE covers a wider range of coverage. In addition, the eMTC can be directly deployed and upgraded based on the existing LTE network and co-located with the existing LTE base station. eMTCs and NB-IoTs can largely reuse the network infrastructure of today's LTE FDD and TD-LTE, so the network can support future NB-IoTs and eMTCs with little equipment investment and do not need to be re-built A net. This is also one of the reasons sought after by major operators.

Application in intelligent logistics, with anti-theft, anti-swap, real-time temperature sensing and positioning advantages, real-time monitoring and positioning, the information recorded and uploaded, you can track the trajectory; in smart wearable devices, can support health monitoring , Video services, data return and positioning; relying on the current cellular interactive screen to provide applications including smart charging pile, waiting treasure, elevator guard, intelligent bus stop, public bicycle management.

IoT in the smart home

As a branch of the Internet of Things, smart home also belongs to the ascendant market. At present, the two major problems of "smart combination" and "connection combination" are mainly solved. As a smart home manufacturers, although intelligent hardware features increasingly rich, but this only solve the problem of smart combo. We often talk about the interconnection at the level of the connection portfolio, the current smart home market in the country basically choose Wi-Fi, Bluetooth, ZigBee, Z-Wave and other near field communication technology, I have also seen some choices Lora And Sigfox two narrowband Internet of Things technology in smart home, smart communities and smart city applications. However, because the commercial application of LTE-based IoT NB-IoT and eMTC can not start until next year, it is still in an unknown stage for the connection selection of smart home in the future, and the market is almost empty. However, this gap is A wide range of strong demand lies.

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