How far can Wi-Fi wireless technology go before 4G? (1)

The Application of Wi-Fi wireless technology on iPhone has become more popular in foreign countries. This is due to the increasing pressure of 3G, which brings opportunities for Wi-Fi wireless technology. However, how far can Wi-Fi continue when 4g acceleration is being developed? In this era of rapid development, where is Wi-Fi wireless technology going?

Market Research firm ABI Research reported that about 2014 of smartphones will have built-in Wi-Fi in 90%. According to ABI, about half of smartphones currently have built-in Wi-Fi, which will increase to about 2014 in 90%. A major factor driving smart phone's built-in Wi-Fi is the need for a large number of bandwidth multimedia applications. Through Wi-Fi, smart phones can achieve high-speed wireless connection, transfer files, synchronize data, send and receive information or chat online, and browse wep web pages.

Apple's iPhone (mobile Internet access) is one of the first smartphones to show the advantages of Wi-Fi wireless technology, but the iPhone's wireless data traffic is much higher than other users.

O2 declared at the end of December that the data traffic generated by iPhone and other smartphone users in the past six months caused pressure on the London communication network. Due to the surge in data traffic, since the summer of, O2 suffered a series of network crash events. In addition to O2, AT&T also suspended its iPhone online sales in New York at the end of, saying it was not ready for the iPhone yet, mainly because the base station was not enough.

To reduce the pressure on 3G networks, AT&T has called on iPhone users to access the Internet through over 20 thousand free Wi-Fi hotspots. Even if a mobile operator launches a 4G network, the Wi-Fi wireless technology will still have a place in the wireless network access field due to its low cost.

So why is Wi-Fi wireless technology favored? This will start with the performance of Wi-Fi.

Overview of Wi-Fi wireless technology

WLAN standards mainly include 802.11b, 802.11a, and 802.11g. At present, the promotion and authentication of WLAN is mainly completed by the Wi-FiWirelessFidelity, wireless fidelity) Alliance of the industrial standard organization. Therefore, WLAN technology is often called Wi-Fi.

802.11b adopts a GHz band and supports 11 Mbps shared access rate. 802.11a adopts a 5 GHz band with a rate of up to 54 Mbps and uses OFDM orthogonal frequency division multiplexing, however, the Accessibility distance is reduced to 30-50 meters.

802.11b uses a 2-4 GHz band and supports 11 Mbps shared access rate, covering 100 meters.

802.11g is a hybrid standard that can adapt to both the 802.11b standard and the 802.11a standard. The speed is as high as 54 Mbps. It is 5 times faster than 802.11b and is compatible with 802.11b.

IEEE802.11n, which is waiting for approval, has a speed of up to 300 Mbps. At present, some manufacturers have already applied it to the market.

Wi-Fi wireless technology Advantages

Wi-Fi is a wireless LAN consisting of an AP (AccessPoint) and a wireless network card. The network is simple and can be independent from the wiring conditions. Therefore, it is very suitable for mobile office users.

Flexible application: flexible enough for a small network with only a few users to a large network with thousands of users.

With rich terminal support and economic savings, manufacturers have a low entry threshold in this field. The cost of Wi-Fi networking is low.

Provides the roaming service: Provides the roaming features that cannot be provided by the wired network for your convenience.