How much do you know about WiFi in smart home "those" applications?

Wi Fi

The full name of WiFi is Wireless Fidelity, which is a technology that can connect terminals such as personal computers and handheld devices (such as Pads and mobile phones) to each other wirelessly. The first version of WiFi was published in 1997. It specifies the basic network structure and basic transmission media for wireless LANs, and specifies the physical layer (PHY) and media access layer (MAC) features. The physical layer uses infrared, DSSS (Direct Sequence Spread Spectrum) or FHSS (Frequency Hopping Spread Spectrum) techniques. In 1999, it added the IEEE 802.11a and IEEE 802.11g standards, and its transmission rate was up to 54Ms, enabling it to widely support data, video, voice, and multimedia services. At present, most of the WiFi we use is based on the IEEE802.11n wireless standard. Its greatest advantage is its high transmission speed, its data transmission rate reaches 300Mb/s, and its throughput is close to 100M to 150Mo.

With the new 802.11ac standard replacing the IEEE 802.11n strong killing WiFi technology market, the application of the new standard WiFi transmission rate will also increase tenfold, effectively solving the data error correction problems, error codes, and WiFi devices and Switching and security authentication issues between equipment, equipment and base stations. Secondly, compared with the wired network, WiFi does not need to be wired, and it is not limited by the wiring conditions, so it is very suitable for the needs of mobile office users.

In addition, the basic equipment for setting up a wireless network is usually a wireless network card and an AP, so that wireless resources can be shared with existing wired architectures. Therefore, the cost and complexity of WiFi installation is much lower than that of traditional wired networks. The network, if only a few computers are peer to peer, can also be used without an AP. It only requires a wireless network card for each computer. WiFi's flexibility and mobility have laid the technical foundation for its commercial application and promotion.

WiFi Alliance

The full name of the Wi-Fi Alliance (WFA) is the International WiFi Alliance. Founded in 1999, it is a global business alliance headquartered in Austin, Texas. It aims to promote the adoption of a worldwide standard specification for high-speed wireless local area networks and to promote the compatibility certification of WiFi products worldwide. The alliance has more than 300 members and continues to grow and expand, covering manufacturers and standardization agencies, regulatory agencies, service providers and operators and other industrial chains and maintaining good relations of cooperation with them.

To date, the WiFi Alliance has certified the interoperability of over 2,800 products. However, for the WiFi Alliance, there is more work than interoperability and every effort is made to provide WiFi users with the information they need to make decisions on existing WiFi systems. In 2013, the WiFi Alliance announced that it would merge with the Wireless Gigabit Alliance (WiGig) to include its technology. The combination of WiFi Alliance and WiGig Alliance expertise will provide a superior user experience (60GHz solution) and help ensure that a full range of interoperable WiGig solutions are brought to market as soon as possible, enabling technology users worldwide Benefit.

WiFi application in smart home

Wherever the Internet touches, WiFi coverage is available. Nowadays, WiFi is available for free in most high-end hotels, large libraries, small canteens, coffee shops, and small restaurants. Modern homes can also be seen everywhere. The greatest advantage of WiFi for smart homes is the ability to seamlessly connect networked home devices to the Internet without excessive consideration of signal transitions; more critically, WiFi is less developed than other untrusted communication technologies. , Low cost budget, ideal for smart home startups; WiFi technology, WiFi development, low cost budget, ideal for smart home startups; WiFi technology also has a fast transfer rate, a wide range of radio waves, without wiring It has many advantages such as good scalability, high mobility, and high permeability, so it is widely used in various fields of smart home.

The WiFi smart gateway is one of the representatives of WiFi home smart devices. As a home intelligence hub, after the wireless RF module on the smart gateway communicates with various child nodes in the mobile phone, the user can easily realize intelligent visual intercom and intelligent control of the home appliance. Using a computer network to remotely log in to the home gateway, users can also realize real-time monitoring of home environments and remote control of home devices. In addition, through the community management software, the property manager can edit various information such as text, pictures, videos, weather, etc., and send the information to the smart gateway in the owner's home in real time. The owner can browse through the smart gateway prompts. Class information.

With the rise of the concept of light intelligence and micro-intelligence, the application of WiFi in smart homes has been further promoted and ushered in a new development opportunity. Lightweight smart home manufacturers prefer to use home WiFi to directly connect home devices. The WiFi module is placed in switches, sockets, lights, routers, and set-top boxes as an entrance to a smart home and a controllable center. Intelligent control of home equipment, such as foreign Belkin, Torrap and domestic millet, Baidu, LeTV and so on.