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Bluetooth 5 Bringing Double Range, Quadruple Speed

6/13/2016 02:00 PM EDT
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y_sasaki
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Re: Double or Quad speed?
y_sasaki   6/15/2016 12:56:01 PM
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Exactly, andre212. When I started Bluetooth development I was astonished by amount of profiles and options defined, but eventually I figured out most of them are practically not used at all.

It was hoped that Bluetooth LE would make things simpler - everything supposed to work on same GATT data structure, with only 1 type of packet, and simplified pairing method.

However, Bluetooth SIG has been keep adding Bells and Whistles. BT4.1 introduced user-defined L2CAPLE socket. BT4.2 introduced large packet (256Byte), ECDH secure paring option, IPv6 over Bluetooth interface (IPCP profile) and more. Then more things would be added in upcoming BT5.0. I feel market is barely catching up with BT SIG spec update.

 

andre212
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Re: Double or Quad speed?
andre212   6/14/2016 2:52:38 PM
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BT spec was a big monster from very beginning, they did not really know what  they gonna use it for, so they introduced a huge number of profiles, of witch only two have survived to this day: -SCO/ESCO ( your phone voice link) and -A2DP (your headset stereo headphones), the Serial Port profile is also used, yes, but it its not widely spread.

The sensors don't need any higher rates than BLE already has. IMHO 5.0 it's a desperate attempt of the SIG to achieve what?,-low pwr, -higher speed, -compete with 802.11ac? or 802.11 ulp?

MWagner_MA
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Improve it until it breaks
MWagner_MA   6/14/2016 7:22:50 AM
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This is too bad.  Bluetooth works well at the moment.  Now it will be "improved" just like Wifi to try to impress someone (don't know who) about a blazing speed with an error rate that makes it as effective as the last standard....see WiFi N at 5.8Ghz.  Improvements have been made but there are fundamental laws of physics.  You want the best range - go lower frequency.  You want the highest datarate, go high frequency.  Opposing requirements are what engineering tradeoffs are all about - no magic.

y_sasaki
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Double or Quad speed?
y_sasaki   6/13/2016 7:37:09 PM
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I saw several news source says "Quadriple speed, Double range" while others say "Double speed, Quadriple range". If "Quadriple speed" is true as message from Mark Powell says, I wonder what magic they applied. They already archieved "Triple speed" back in Bluetooth 2.0, using 8-PSK modulation (3bits/symbol) instead of Bipolar GFSK (1bit/symbol). Sure there are more high-density modulation schemes known (16QAM 4bit/symbol for example) but it requires much complex to process and will result more power consumption.

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