new Wi-Fi, Tarzan Wi-Fi, Vi-Fi
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Tarzan Wi-Fi
Imagine swinging from tree to tree like tarzan and shout at the top of the lung "Vi-Fi". Vi-Fi is a new term to describe the protocols that lets Wi-Fi clients keep in touch with several access points at once.
When you're on the move and there are several overlapping access points coverage you're able to snatch any of the access points to get you connected to the internet using enhanced algorithm. Study shown that Vi-Fi doubles the number of successful short TCP transfers and doubles the length of disruption-free VOIP sessions compared to an existing and more fragile Wi-Fi protocol.
The people behind the this new technology are Todd Bishop, Aruna Balasubramaniam, Arun Venkataramani and Brian Nell Levine of the University of Massachusetts at Amherst. Also people from Microsoft: Mahajan and John Zahorjan from University of Washington.
Similar to its predecessor the signal will also drop due to these disruptions: tall buildings, topography, weather and many more. Due to the overlapping coverage of multiple access points at any given moment, the packet are "overheard" by all of them, even if only one is chosen to associate with the client. In order to choose which station will be used at any given moment, a packet sent by the client overhear by a cluster of base stations and listen for acknowledgment (ACK signal). If one base station send back the ACK signal no other base station will send the ACK signal. However if no base station responds to it Vi-Fi algorithm is used to determine which one of the base station will forward the packet.
Quite technical is it?
In a test performed nearby the Microsoft complex at Redmond, Washington, and at the DieselNet at UMass-Amherst campus, computer with Wi-Fi radios were mounted in vans making periodic circuits past Wi-Fi base stations. The team compared the Vi-Fi results with those from a conventional Wi-Fi handoff mechanism. The findings "Performance improved by a factor of roughly 2 with Vi-Fi". Basically voice calls were clearer on average and the number of disruptions dropped also by a factor of 2. Disruption free time also doubled. The algorithm for Vi-Fi also is said can be used for normal Wi-Fi network.
When you're on the move and there are several overlapping access points coverage you're able to snatch any of the access points to get you connected to the internet using enhanced algorithm. Study shown that Vi-Fi doubles the number of successful short TCP transfers and doubles the length of disruption-free VOIP sessions compared to an existing and more fragile Wi-Fi protocol.
The people behind the this new technology are Todd Bishop, Aruna Balasubramaniam, Arun Venkataramani and Brian Nell Levine of the University of Massachusetts at Amherst. Also people from Microsoft: Mahajan and John Zahorjan from University of Washington.
Similar to its predecessor the signal will also drop due to these disruptions: tall buildings, topography, weather and many more. Due to the overlapping coverage of multiple access points at any given moment, the packet are "overheard" by all of them, even if only one is chosen to associate with the client. In order to choose which station will be used at any given moment, a packet sent by the client overhear by a cluster of base stations and listen for acknowledgment (ACK signal). If one base station send back the ACK signal no other base station will send the ACK signal. However if no base station responds to it Vi-Fi algorithm is used to determine which one of the base station will forward the packet.
Quite technical is it?
In a test performed nearby the Microsoft complex at Redmond, Washington, and at the DieselNet at UMass-Amherst campus, computer with Wi-Fi radios were mounted in vans making periodic circuits past Wi-Fi base stations. The team compared the Vi-Fi results with those from a conventional Wi-Fi handoff mechanism. The findings "Performance improved by a factor of roughly 2 with Vi-Fi". Basically voice calls were clearer on average and the number of disruptions dropped also by a factor of 2. Disruption free time also doubled. The algorithm for Vi-Fi also is said can be used for normal Wi-Fi network.
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