802.11n performance leap, Wi-Fi's 8 major Internet changes

802.11n has made a great leap in performance-the rate from 300Mbps to 100M to 150Mbps-this will bring unprecedented convenience to wireless life and work. We can draw a blueprint for the rapid development of wireless connection performance-wireless access points will become more and more common, and the point-to-point interconnection will become more and more smooth. Here, we will explain the changes of Wi-Fi in the future from eight aspects, these changes will bring us better signal quality, more reliable connection, better bandwidth, longer battery life and stronger Safety performance.

1. Better bandwidth

Although IEEE has initiated two projects aimed at endowing the 802.11n standard with a gigabit rate, none of these projects have submitted a preliminary draft.

The 11n standard makes a series of high rates possible, and these rates are suitable for different functions and devices. Today, all 11n radios support two-dimensional data streams. Such data streams are sent and received through components made of two to three antennas. Mobile devices have also used these radio components. For example, Apple ’s latest Wi-Fi iPod Touch is equipped with a Broadcom radio chip. Although this chip supports the 11.n standard, it has not yet used this standard.

Soon, more Wi-Fi chips will support three to four data streams, and the data transmission rate is expected to reach 450Mbps to 600Mbps. Earlier this year, Quantenna Communications announced that it was planning to launch a 4x4 chipset, which can transmit high-definition television signals in a home environment.

Wi-Fi equipment supplier Ruckus wireless manufacturer founder and CTOWilliam Kish said: "Although there will not be a large number of client devices supporting 4D data streams in the future, well-designed access points will also make good use of the 600Mbps physical layer rate. Achieve high-speed transmission. "In the future, users can screen high-end nodes through the 802.11n standard to create a Wi-Fi network like the Internet.

802.11n performance leap, Wi-Fi's 8 major Internet changes

2. Stronger radio signal

In the radio chip, there will be more optional features that meet the 11n standard. And these properties can be used for wireless clients and access points, thereby making the radio signal more reliable.

CTO William McFarland, CTO of chipmaker Atheros Communications, said: "The new 11n physical layer technology will make Wi-Fi signals stronger and cover a wider range of high transmission rates."

These features include: improved error correction performance, low-density parity check; use of Wi-Fi customer feedback information to allow the access point to focus on the customer ’s wireless signal transmission beam formation; and the use of multiple antennas to improve signal stability. Block coding.

McFarland said that if we use a laptop near a building that provides Wi-Fi, we will find that the signal is extremely unstable. After using space-time block coding, the connection will stabilize.

3. Wi-Fi life

Technological innovations in energy consumption and management allow us not only to extend the battery life of Wi-Fi phones, but also to apply Wi-Fi technology to a variety of new devices, even wireless sensors: including medical monitoring equipment, building control System, real-time location tracking labels and consumer electronics products. The result is that people can continue monitoring tasks and complete data connections according to their needs.

Summit Wi-Fi provider Summit Data Communications recently announced that 802.11a transmits wireless signals in a variety of plug-in formats, with the goal of allowing all types of devices to use the 5Ghz frequency band that is not crowded. The startup Gainspan provides 11bg Wi-Fi wireless transmission, which has an IP software stack. Due to the low energy consumption of this transmission method, the use of standard batteries can allow wireless sensors to run for several years. The Redpine Signals company provides a single data stream embedded 11n wireless transmission.

4. Improved safety performance

The most erosive impact of the Internet is the loss of user interests through identity fraud, blocking service attacks, and privacy violations. If users are convinced that Wi-Fi connection will bring unacceptable risks, then mobility may increase the probability of such violations.

IEEE recently adopted the 802.11w standard, which protects the wireless management framework that was used to optimize wireless connections. Now, Wi-Fi customers can receive and follow the "off-network" instructions, because such instructions may be generated by intruders using fake MAC addresses. The 11w standard will cut off such attacks.

In layman's terms, Wi-Fi will allow users to enjoy a better connection through the use of security based on identity recognition. In Wi-Fi networks, security policies are associated with users, not with switch ports. The advantage of this is that users can freely access the network in various places such as home, work, hotel, work and dining area, and public hotspots, without the need to move to the security strategy.

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