Mar

Wi-Fi wireless networking advantage of the eight components

Unlimited fashion, wi-fi has become a superstar. wi-fi can be called Synopsis of armor, from the eight-round package itself. Respectively below the bandwidth, signal, power, security, financial networks, personal services, mobile features, client-side analysis of all-round for your wi-fi is unique.

wi-fi wireless network edge 1: wider bandwidth

Although the IEEE launched two projects intended to 802.11 standard data rates up to gigabit or multi-gigabit, but the the first draft has not yet formed.

more practical point is that the data rate of 802.11n standard will be raised one level, you can adapt to different functions and equipment, at present, all the 11n wireless transmitters and receivers support two spatial data streams to send and receive data can be used two or three antenna combination of Apple's new wi-fiiPodTouch to contain a Broadcom (Broadcom) wireless chipsets, support 11n standard.

very soon there will be a chip supports three or four data streams, the data rate can reach 450Mbps, respectively, and 600Mbps. In early 2009, Quantenna Communications says it has successfully developed 4×4 chips, that can carry high-definition digital television signal flow.

wi-fi equipment suppliers and co-founder of Ruckus Wireless CTOWilliamKish said: Although not a lot of customer premises equipment to support four spatial streams, as long as the proper design of access points, will be able to use 600Mbps physical layer data rates, achieving high-speed wireless backbone network.

You can 802.11s standard will these high-end nodes connected together to form a similar capacity with redundant Internet wi-fi network.

wi-fi wireless network edge 2: a stronger RF signal

11n in the additional optional performance characteristics will appear in the wireless chip, wireless clients and wireless access point to use these chips will enable radio frequency (RF) signals a more flexible, stable and reliable, in other words more like a wire.

wireless chip maker Atheros's CTOWilliamMcFarland said: The new [11n] physical layer technology will enable more powerful wi-fi in a given data transfer rate within the higher and longer transmission distance.

These performance characteristics include: low-density parity-check codes, improve error correction capability; launch beam forming, which uses wi-fi from the client's feedback, so that an access point to focus on the client RF signal; space-time block coding (STBC), which uses multiple antennas to improve signal reliability.

McFarland said: Now you are with a wi-fi enabled laptop Rao buildings a week, you will find the data rate of decline or disappear, but the use of STBC, the connection will continue to work.

wi-fi wireless network advantage 3: wi-fi at lower power consumption

802.11n in the power and management aspects of a major innovation, not only to extend the wi-fi smart mobile phone battery life, but also can be embedded into other devices, such as medical monitoring equipment, building control systems, real-time location tracking labels and consumer electronics products. Can continue to monitor and collect data, can be based on the user's identity and location personalization.

Network World (NetworkWorld) Bo wrote the main CraigMathias other modern RF technology can not do, and now wi-fi can be done.

Atheros's McFarland said: As the enterprise wireless LAN construction, these infrastructure already in place, and now just need to add low-power sensor on it.

Embedded wi-fi wireless data communications vendor summit recently announced by the 802.11a wireless communications in a variety of plug-in form, so that devices use non-crowded 5GHz band, Gainspan provided by the 11b / g wireless devices with an IP software stack, power consumption is very low, a standard battery can run a few years, RedpineSignals provides a single stream embedded into the 11n wireless communications.

wi-fi wireless network edge 4: Improving Security

The impact of the Internet's most devastating proof of identity through theft, denial of service attacks, invasion of privacy, spying and the lack of the corresponding trust means the harm to users, mobile network to make this situation worse, if the user confidence in the current open wi-fi connection, it is possible to make them devastating risk.

IEEE recently ratified the 802.11w standards, which protects the wireless management frames, so that the wireless link work better, TrapezeNetworks chief analyst MatthewGast said: wi-fi clients can now receive and adopt the 'landing Network' information Before this message may be caused by a hacker break the access point MAC addresses using forged, 11w standard cut off such attacks.

ArubaNetwork's strategic marketing director MichaelTennefoss said: wi-fi will be using identity-based security, wi-fi network, the security policy associated with the user, rather than associated with the port, so that the advantage of users at home , office space, hotels, offices and public places, mobile, security will not be affected.

wi-fi wireless network advantage 5: wi-fi networks and non-collaboration

If you are a T-Mobilewi-fi users, but you are now in the other operators within the framework of the hot, then you can not use the wi-fi's. In the future, your wi-fi devices to check the external network (other carrier's wireless network) services, and can securely access, your user identity will roam with you so that you can use a variety of wi -fi service.

802.11u standards are ratified, the user will be more flexibility in the use of wireless networks, the future of wi-fi in order to be external advertising their services, subject to its provisions as long as you can link to them, according to your identity, you can access other network services for all or part of a subset of that in case of emergency, you can get basic connectivity and functionality, 802.11u standard plan to final approval in June 2010.

wi-fi wireless network edge 6: self-management, wi-fi client

wi-fi equipment manufacturers have thought of many ways to make their devices and wireless access point is more Intelligent integration, the current self-management of wireless access points is quite sophisticated, but the wireless client's management or blank.

If you access point and the client together with the new wi-fi management agreement, the collaboration between them would be more interesting.

Imagine you have access to the Internet this wi-fi adapter, or wi-fiVoIP phone does not send and receive wireless signals, or only share location data, we can save electricity, access points can be wi-fi audio conference re - directed to a better adjacent access points, or redirected to an access point on the lower load. wi-fi network can locate a client's location, for example, buildings, or in the street, can be based on these data given the client to connect operation.

802.11v standard may be completed by the end of July 2010, in the wi-fi management, there will be a number of enhanced features, it will add a counter array of statistics to collect to increase the power management, improving battery life and improve the position of data support.

wi-fi alliance wi-fi multimedia admission control practices are also being addressed in the client co-ordination problems, the specification is currently being developed, which allows for consultation and management of wireless network streaming media session, so high-definition video will not cut off the same access point on the wi-fi voice conversation, wi-fi alliance is considering a specific wi-fi to manage the specification, mainly borrowed from several related IEEE standards, and then an additional wireless management capabilities.

wi-fi wireless network edge 7: Adoption of the Smart RF (radio frequency) management to improve the mobility

In the previous standards, the lack of RF management, as between access points and clients , as well as between neighboring wireless devices often do not know each other, they only understand their own radio frequencies, this limitation makes the RF is also very difficult to manage.

For example, when a mobile phone into a wi-fi access point range, it will trigger a blind search process, if the client can ask of its access point to your neighbor who, which one is the best connection access point?, so that devices and networks can better collaborate at the same time, wi-fi access point can see the client's RF environment to identify weak signals or insufficient coverage, and then take steps to optimize the connection.

Last year, published IEEE802.11k radio resource management standards to solve this problem, but wi-fi equipment manufacturers have implemented a series of exclusive features to respond to this challenge, Aruba adaptive wireless management technology, version 2.0 is the an example.

At the same time, wi-fi alliance idea of using the 11k some of the characteristics of its voice business certification goal is to optimize large-scale, enterprise-class environment for wi-fi voice call quality.

wi-fi wireless network edge 8: wi-fi personal area

The current wi-fi is an end to end connection, the future of wi-fi network, your device wherever they can be directly connected to other client devices, such as carrying a low-power chips Ozmo equipment so that peripherals can be connected via wi-fi directly to your laptop.

wi-fi Alliance recently announced wi-fiDirect (WFD) project, will let your laptop's wi-fi card to bypass the access point, directly connected to a wireless printer, digital cameras, projectors, sensors or plasma屏幕. As an industry specifications, WFD will be the introduction of a new firmware protocol implementation, so no need to make changes to the hardware.

At the same time, wi-fi access point through the 802.11z standard (scheduled for completion in July 2010) can also become a point-to-connect the engine, it will provide a direct connection to configure extensions, the client device from one access point Request permission to connect directly to another nearby client devices, but the data not through the access point, the client is still connected with the access point from the access point offers a full range of security and management services.

Trapeze's Gast said: After the DSL extensions, without abandoning the advantages of the infrastructure, raising the efficiency of direct communication.