According to the US technology website BGR reported on June 6, Google free Wi-Fi is about to land in seven railway stations in India, including the Sialda and Allahabad train stations. Google and India's RailTel are working together to provide free Wi-Fi service to 100 train stations in India by the end of 2016. On June 6, Huawei, the world's leading provider of information and communication solutions, today announced that its agile distributed Wi-Fi solution has passed the test and verification of the international authoritative testing organization Tolly Group.
The IEEE 802.11 series LAN standard is called WiFi. Recently, WiFi routers have been upgraded from the 802.11n standard to the latest 802.11ac standard.
In recent years, printers, cameras and smart home devices using the WiFi Direct standard have appeared on the market, with a peak data transmission rate of 250 Mbps. The latest developments in WiFi routers are the choice of 2.4 GHz and 5 GHz spectrum. The former is called "2G" and the latter is called "5G". The 2G channel is crowded, but the coverage is larger than 5G. The latter has a small coverage but the data. The transfer rate is faster.
Wi-Fi
Therefore, it is suitable to use 2G when it is far from the router, and use 5G when it is close to the router and download movies. Routers that offer both 2G and 5G channels are everywhere, but there are many factors in the future of WiFi.
What is the AC5400, AC5300, MU-MIMO and 802.11ax?
Several so-called “three-band Gigabit†802.11ac WiFi routers appeared on the market in 2016, although they promised data rates of 5300 Mbps to 5400 Mbps – so they have two informal names: AC5300 or AC5400, which actually Just a normal dual-band router adds a 5GHz band.
According to TechRadar, the goal of this innovation is to increase the convenience of existing technologies rather than new technologies. The upcoming models include the Linksys EA9500 Max-Stream and the ASUS RT-AC5300, both of which include MU-MIMO - representing multi-user, multi-input and multi-output.
There are usually a lot of devices in modern homes that compete for bandwidth—especially streaming video. MU-MIMO shares bandwidth equally and is expected to be the default feature of future WiFi routers.
Even more exciting is the prospect of supporting WiFi routers with the 802.11ax standard. The 802.11ax standard is currently under development and is scheduled for release in 2019. The data transmission rate can reach 10 Gbps and the 5 GHz band is still used. Market research firm ABI Research predicts that by 2021, 802.11ax will account for 57% of WiFi chipset sales. Therefore, 802.11ax will become the "new standard" for WiFi routers.
What is the 802.11ad and WiGig standard?
These are the same technologies. WiGig (short for Wireless Gigabit) is high-end WiFi that uses ultra-licensed 60 GHz spectrum to achieve ultra-high data rates of up to 7 Gbps through four 2.16 GHz bands. The Gigabit WiFi provided by WiGig is ideal for the 5G era - when users can create and upload full HD and 4K video via smartphone.
Although the manufacturer is already experimenting, the connection with 5G means that WiGig will not come out in the next few years. Pulian, NETGEAR and Elico showcased the WiGig router at the 2016 International Consumer Electronics Show. Peraso recently demonstrated its first WiGig USB device at the 2016 International Computer Show in Taipei. WiGig access points, network adapters, tablets, smartphones and notebooks are expected to eventually go on sale.
ABI Research estimates that by 2018, WiGig chips will sell more than 600 million units a year. The 802.11ay under development is an enhanced standard of WiGig, with a working spectrum of 60 GHz and a data transmission rate of up to 20 Gbps, but with a short data transmission distance.
What is WiFi HaLow?
Narrow-band IoT devices are driving new innovations in WiFi and connectivity. Although many smart home and industrial networking devices can use Bluetooth or WiFi, they require higher data transmission capabilities and longer transmission distances. HaLow is based on the IEEE 802.11ah standard and uses the 900MHz frequency band. The data transmission distance is farther and the energy consumption is not high.
The downside of HaLow is that its data transfer rate is 150KB-18Mbps, which is of little impact on smart home devices that only need to transfer a small amount of data. The HaLow signal is quite strong through the wall. The HaLow standard tri-band router is expected to be available for sale in 2018.
What is LPWAN?
HaLow is a WiFi-approved LPWAN (Low Power Wide Area Network) technology that runs on WiFi routers. LPWAN is also a low-bandwidth connection technology for IoT devices. Its key advantage over WiFi is lower power consumption.
LPWAN, also known as Sigfox, LoRa, HyperCat, and Weightless, is known as a "missing link" in IoT devices that require long-distance, low-energy communication, such as smart meters and smart cities.
TechRadar claims that because energy consumption is lower than WiFi, LPWAN is better suited for smart farms and other wide-area applications that use environmental sensors and motion sensors, but HaLow makes LPWAN useless where it can use WiFi routers— - for example in smart homes and smart buildings.
What is LTE-U?
The "U" here means that no license is required, and Qualcomm's LTE-U is also called LTE-LAA (LTE Auxiliary Authorization Access). The goal of LTE-U is to increase the capacity of LTE mobile networks, using part of the spectrum that does not require a license - usually the 5 GHz spectrum used by WiFi routers. Different countries and regions have different conditions, and some frequency bands may have been used by police, hospitals or factories for short-range wireless signal transmission.
LTE-U can expand the LTE mobile network when necessary and at the same time, and even provide gigabit network speed for mobile phones. However, industry insiders worry that if mobile operators deploy LTE-U, the existing WiFi network may be squeezed. The WiFi Alliance is opposed to the use of LTE-U, and regulators are also "negatively absent".
ABI Research estimates that WiFi chipset sales will exceed 20 billion units during 2016-2021, but one thing is certain. With the proliferation of mobile devices and the popularity of IoT devices, faster, wider coverage and better WiFi. The desire will not stop.
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