Bluetooth 2.1 vs Bluetooth 3.0

C

cool_kals9

Broken In
Hello guys,

I wanna know the difference b/w bluetooth 2.1 vs 3.0.
Please throw light on the topic.
how much important it is to be given??
 
setanjan123

setanjan123

In the zone
Dont know much. V3.0 is supposed to be much faster. Well i saw bluetooth transfer on n8 whch has v3.0. It seemd 2 be much faster than a N95 8gb
 
Alien

Alien

Journeyman
Actually just BT 3.0 doesn't give improvement in speed. Speed improvement is there only with BT 3.0 + HS.
We researched the Bluetooth 3.0 issue and the reason for the low speeds we were getting became instantly clear – it’s a simple case of confusing labels. You’d think that Bluetooth 3.0 is Bluetooth 3.0, right? Wrong.

The Bluetooth 3.0 specifications detail three things – Unicast connection-less data, Enhanced Power Control and Alternate MAC/PHY.

The Unicast part specifies a way to send a little data without much delay (e.g. a remote control) and the Enhanced Power Control keeps a tighter reign on the transmitting power and makes the device a little more power-efficient.

But it’s the Alternate MAC/PHY section of the specifications that’s interesting – and also the section that’s not mandatory to get a Bluetooth 3.0 certification. It allows two BT3.0-certified devices to do a handshake over a Bluetooth link and then switch to a 802.11 link (the base technology for Wi-Fi) to achieve speeds of up to 24Mbps.

Devices that support Alternate MAC/PHY are certified as “Bluetooth 3.0+HS” (High Speed) and ones that don’t are certified as just “Bluetooth 3.0” and are limited to regular Bluetooth transfer speeds (no Wi-Fi magic).

A bit more digging reveals that Android 2.2 (and below) doesn’t even support Bluetooth 3.0 – the BlueZ library that it uses is old and works only up to Bluetooth 2.1+EDR. You can check Bluetooth support info for the other Android versions over at their dev site (there’s no info on Gingerbread though).

It’s possible that manufacturers (like Samsung) use a different software stack, but the transfer between the two Bluetooth 3.0 certified Samsung droids we tested was going at v2.1 speeds, so that wasn’t it.

The Bluetooth SIG website settled any remaining doubts we had. None of the phones we checked were Bluetooth 3.0+HS certified, they support just the vanilla v3.0. This put an end to this speed test – 24Mbps just wasn’t going to happen so when you come to pick your next uber-smartphone you can safely ignore the Bluetooth 3.0 specs as long as they don’t list HS explicitly.
Click to expand...
Here is the link.
 
You must log in or register to reply here.
Top Bottom