Roaming and hand over to the Wi-fi
The IEEE has officially become the standard wireless 802.11r protocol that adds functionality to the roaming Wi-Fi, a technology that will allow users connected to a wireless network the rapid transition from an access point to another in order to improve the performance of VoIP on LAN networks with multiple access-point.
The IEEE has worked to 802.11r for four years, and the concept has been said since 2005, but the standard has been officially approved and published by the IEEE this summer.
The original 802.11 standard was designed for a single access point. Currently, however, as is evident in large buildings is to install complex networks with multiple access points. The transition from an access point to another involves, at present, a minimum latency of 100 ms for reassociated, and even a few seconds to authenticate the client again connected in a secure manner. A situation that makes it difficult conversations any VoIP set in motion on networks spread across multiple access points.
The new standard 802.11r will move from one access point to another in about 50 ms. The new standard known as Fast Basic Service Set Transition is able to meet the specifications for roaming voice. Thanks to this new performance VoIP applications and data in motion will improve considerably.
The fact remains that using the same channel with the same key and ssid network, as recommended by us here allows you to eliminate roaming. So with more than a year and a half earlier had suggested the low-cost solution to the problem.
16 October 2008 at 18:47
so if the IEEE is thinking technology "r", this is why we are still in draft-2 of N. It is nice that you always give more space to commercial VOIP, however, I believe that we should also give importance to the bandwidth, especially to the stability of the connection, particularly when this is what is called "crowding" of the band of 2.4 GHz, because if my router N, in the same room can watch a movie in HD that is on the net, just something you interposes between the two antennas (walls, etc ...) the connection begins to have difficulty. Then given that almost all connections are on wifi frequencies very close if the nearby had a connection on frequency similar belief that there would be some problems.
Besides I do not see the reason to have connections in Fast Ethernet, Giga when doors could be a good solution because it was easy to transfer files even some Gb from a PC to another cable.
Also in Italy we always upload connections that have less than 512Kbps, which I believe now is absolutely insufficient, because you are spreading mail with attachments including more than Gb. Think also to sites like panoramio, facebook (to name a few) that give the option of uploading images online.
Immeginatevi then the scene of you engaged in a conversation Voip, maybe even a video (right to increase the bandwidth occupied) and some other member house that I have to upload a file, and here that the band is saturated upload! then even if we have a home network with teconologia N, wired, or powerline, you always have the problem to get data from the house should take it easy .... and since now send pdf, pictures, including Instant Messaging programs is everyday practice, think of how long you expect that your counterpart discharges what you sent.