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Bluetooth: Each Generation

Last post 1/11/2013 4:46:51 PM by zhang juan 1 replies.
Post at: 1/11/2013 4:46:51 PM
  • Judy
  • Judy
  • Member since 2017-09-20
  Bluetooth V4.0 has immerged into our life. What on earth are the differences among each Bluetooth generation?
Bluetooth v1.0 and v1.0B
a major setback for certain services planned for use in Bluetooth environments; had many problems
Bluetooth v1.1
Ratified as IEEE Standard 802.15.1
Bluetooth v1.2
Faster Connection and Discovery
Bluetooth v2.0 + EDR
It is backward compatible with the previous version 1.2
The main difference is the introduction of an Enhanced Data Rate (EDR) for faster data transfer.EDR can provide a lower power consumption through a reduced duty cycle.
Bluetooth v2.1 + EDR
It is fully backward compatible with 1.2.
The headline feature of 2.1 is secure simple pairing (SSP): this improves the pairing experience for Bluetooth devices, while increasing the use and strength of security.
Bluetooth v3.0 + HS
The main new feature is AMP (Alternate MAC/PHY), the addition of 802.11 as a high speed transport.
A Bluetooth 3.0 device without the "+HS" suffix will not support High Speed, and needs to only support a feature introduced in Core Specification Version 3.0 or earlier Core Specification Addendum 1.
Bluetooth v4.0
It is aimed at very low power applications running off a coin cell.
Bluetooth high speed is based on Wi-Fi, and Classic Bluetooth consists of legacy Bluetooth protocols.
• In a single mode implementation the low energy protocol stack is implemented solely.
• In a dual-mode implementation, Bluetooth low energy functionality is integrated into an existing Classic Bluetooth controller.
General improvements in version 4.0 include the changes necessary to facilitate BLE modes, as well the Generic Attribute Profile (GATT) and Security Manager (SM) services with AES Encryption.
As far as I'm concerned, Bluetooth v4.0 is a trend and a wise choice for the coming technology life. Let's look its magic power.
 

Post at: 1/16/2013 9:52:07 AM
 Thanks  for  your  thoughtful information , Judy.

Our community are in deeply need of members like you to share, only together that we can make things better.

We appreciate your future sharings, pls feel free to contact if you have any questions.

Have a nice day

Rambo Wang 




 

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