Five years ago, the boundaries of the network were clearly defined and quite narrow. The types of devices connected to the Internet were mainly personal computers, laptops or desktops, or terminal platforms. Today, the boundaries of the network have become more in-depth and diverse, and with the increasing variety and variety of interconnected "things" that are widely and rapidly expanding, they are often referred to as the Internet of Things (IoT).
Today, the "cloud" is often used to describe a diverse set of hardware consisting of border routers, switches, application delivery controllers, and servers, and hosts server-based applications, databases, and services in the data center. In a similar way, "the fog" is now used to describe the boundaries of the Internet domain, and all new "things" of the Internet of Things (IoT) exist. To illustrate the scale of the equipment that makes up this “fog†layer, statistics show that by 2016 it is expected to grow to more than 6 billion devices, including more than 90 million network nodes, covering simple wearable sensors, smart meters and Building automation controller to environmental management, security monitoring and access control equipment. By 2025, the number of users of connected devices worldwide is expected to reach 50 billion devices, which is equivalent to 6.5 devices per person.
Most applications and services that monitor, manage, and control the proliferation of Internet of Things (IoT) "fog layer" devices will be cloud-based. The Internet of Things (IoT) gateway will support network connectivity between "fog layers" and cloud-wide Internet of Things (IoT) devices. To be effective, the Internet of Things (IoT) gateway must be able to support the LAN connectivity media and protocols used by various Internet of Things (IoT) devices, as well as the connectivity and protocols required to connect to the WAN (and subsequently connect to Internet cloud applications). Let's take a closer look at the key design considerations for these Internet of Things (IoT) gateways:
This article is selected from the Electronic Consumers Network August "Wireless Communications Special Issue" Change The World column, please indicate the source!
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