Tuesday, June 5, 2012

wireless will get gigabit transfer soon

Its has been around five years after 802.1n wireless first launching. The technology is really hitting the ground. With the transfer speed range from 30 Mbps to 150 Mbps, the MIMO technology really help to have real-time streaming on wireless. However, the range is considerably slow right now. Today, with SSDs capable of sustaining transfers of over 500MB/s, the bottleneck in many wireless homes is increasingly becoming WiFi.

The IEEE have been working on the specification for the fifth generation of 5G WiFi: 802.11ac. That spec is now in its draft stages and is expected to be finalised by the end of 2012 or beginning of 2013. The first 802.11ac chipsets have already been announced by Broadcom, with the first devices (routers, USB dongles, PCIe cards and OEM systems) shipping very shortly. Broadcom expects that the final version of the 802.11ac spec will be only marginally different from the current draft and any changes it expects to be able to address in the software. By utilizing the 5Ghz spectrum, the 802.11ac speed transfer is faster than 802.11n up to 4 times to 433Mbps. Then, how it can gigabit transfer? The trick is in the MIMO technology at the endpoint. If we are using 1:1 tranfer of course , we could only get up to 433Mbps, but for the high end laptop, they have 3:3 receive and transmit , which provide them up to 1.3 Gbps speed transfer.

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