802.11n has made a huge leap in performance—from 300Mbps to 100M to 150Mbps—which will bring convenience to wireless life and work. We can sketch a blueprint for the rapid development of wireless connectivity - wireless access points will become more common, and point-to-point interconnections will be smoother. Here, we will explain the future changes of Wi-Fi from eight aspects. These changes will bring us better signal quality, more reliable connection, better bandwidth and longer battery life and stronger. Safety performance.
1. Better bandwidth
Although the IEEE has launched two projects designed to give 802.11n standard gigabit rates, none of these projects have submitted drafts.
The 11n standard makes a range of high rates possible for different functions and devices. Today, all 11n radios support two-dimensional data streams that are sent and received by components made up of two or three antennas that are already used by mobile devices. For example, Apple's latest Wi-Fi iPod Touch is loaded with a Broadcom radio chip that supports the 11.n standard but has not yet used it.
Soon, there will be more Wi-Fi chips supporting three to four streams, and the data transfer rate is expected to reach 450Mbps to 600Mbps. Earlier this year, Quantenna Communications announced that it is preparing to launch a 4x4 chipset that delivers high-definition television signals in a home environment.
"There will be no large number of client devices supporting 4D data streams in the future, but well-designed access points will make good use of the 600Mbps physical layer rate," said CTOWilliam Kish, founder of Wi-Fi device vendor Ruckus Wireless. Achieve high-speed transmission. In the future, users can use the 802.11n standard to filter high-end nodes to create a Wi-Fi network like the Internet.
2. Stronger radio signals
In the radio chip, there will be more optional features that meet the 11n standard. And these capabilities can be used for wireless clients and access points to make radio signals more reliable and reliable.
William McFarland, CTO of chip maker Atheros Communications, said: "The new 11n physical layer technology will make Wi-Fi signals more robust and have higher transmission rates."
These features include: improved error correction performance for low-density parity check; use of Wi-Fi customer feedback to focus access points on customer wireless signal beamforming; and space-time to improve signal stability with multiple antennas Block coding.
McFarland said that now if we use a laptop near a building that provides Wi-Fi, we will find the signal extremely unstable. With space-time block coding, the connection will stabilize.
3. Wi-Fi life
Technological innovations in energy consumption and management allow us to not only extend the battery life of Wi-Fi handsets, 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 tags and consumer electronics. The result is that people can continue to monitor tasks and complete data connections as they need them.
Embedded Data Communications, Inc., an embedded Wi-Fi provider, recently announced that 802.11a uses a variety of plug-in forms for wireless signal transmission in order to allow all types of devices to use the uncongested 5Ghz band. The startup Gainspan offers 11bg Wi-Fi wireless transmission with an IP software stack that allows the wireless sensor to run for years using standard batteries due to its low power consumption. Redpine Signals offers single-stream embedded 11n wireless transmissions.
4. Improved safety performance
The most erosive impact of the Internet is the loss of user interests through identity confession, blocking service attacks, and privacy violations. If users are convinced that a Wi-Fi connection poses an unacceptable risk, then mobility may increase the chance of such a violation.
The IEEE recently passed the 802.11w standard, which protects the wireless management framework that was used to optimize wireless connectivity. Wi-Fi clients can now receive and follow "out of the network" instructions because such instructions may be generated by an intruder using a fake MAC address. The 11w standard will cut off such attacks.
Popularly speaking, Wi-Fi will allow users to enjoy better connections by using identity-based security. In a Wi-Fi network, security policies are associated with users rather than with switch ports. The advantage of this is that users can freely access the network in various places such as home, work, hotels, work and dining areas, and public hotspots, without having to relocate security policies.
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