The real world working of the technology is yet to be discovered as there aren’t many devices using it.
#Difference between bluetooth versions Bluetooth
However, if the manufacturer incorporates the low energy feature in the older Bluetooth versions, it will be compatible with v4.0. However, one of the gray areas of this version is that it is not compatible with the existing Bluetooth devices. However, according to the developers, the speed aspect has to be looked into, keeping the power consumption low. The version’s speed is 1 megabit per second (Mbps) which is somewhat similar to the classic Bluetooth. The v4.0 wasn’t made for speed for low power features. The time needed for a device to wake up from the sleep mode is less, thus when critical data is to be sent, the device can wake up in an instant. The key here is that the technology sends smaller bits of data whenever the data transfer takes place and puts all the unused connections to sleep, thus saving on power. It can use a single cell without recharging for years, thus allowing sensors to operate continuously. It uses the high speed data transfer feature of the v3.0+HS and combines it with its own feature of low power consumption. Many people mistake the 4.0 version to be the BLE (Bluetooth Low Energy) but LE is just a feature of the entire version. It includes Classic Bluetooth, Bluetooth High Speed, and Bluetooth Low Energy Protocols. This version includes the three Bluetooth technologies combined into one. There are two new protocols that are added to this version’s host: (i) Attribute Protocol (ATT), which uses L2CAP for data unit transfer and (ii) Security Manager Protocol (SMP),which provides interface for secured data transfer.
#Difference between bluetooth versions mac
The v4.0 has an additional link controller, Low Energy (LE) baseband link along with a control manager which controls devices that are connected to both the controllers, MAC and LE. MAC’s architecture is the same as that in the classical Bluetooth. The 4.0 version reuses most of the previously used protocols and radio modules.
In the standby mode, the v3.0+HS disables the 802.11 link and only maintains the Bluetooth so as to have low power consumption.īluetooth 4.0 is developed by SIG, and it is adopted since June 2010. The range of the Bluetooth is the same as the classical Bluetooth, i.e., around 10m and 100m for long ranges. This enhanced speed is due to the additional radio protocol that is added to the architecture, which enables bursts of data transfer at high speed through this turbo channel. The v3.0+HS has an enhanced speed of 24Mbps, which is almost 10 times higher than the classic Bluetooth. If this feature is enabled, only then will the data transfer over the 802.11 be possible. The HS part of the 3.0+HS version is an optional feature. The communicating devices are susceptible to attacks on ad-hoc networks. The security aspect in the technology is lacking due to the use of the ad-hoc connection. The main feature of the technology is that it is backward compatible thus, even if one device uses an older protocol, the communication is still possible. Then, there is an ad-hoc connection set up by creating a PAN (personal area network). The initial peer-to-peer connection is initiated by using the traditional Bluetooth protocol. Thus, by utilizing the Wi-Fi radio, the power consumption can be minimized from the classic Bluetooth. The radio is utilized for the initial startup operations, like device discovery, initiating connections, and profile configurations. The 3.0+HS version of the technology uses the Wi-Fi radio for its operation. In the AMP PAL, the AMP MAC is interfaced with the L2CAP and AMP Manager. The 3.0+HS version enables the use of Generic Alternate MAC/PHY layer the AMP is an addition to this version.
The original architecture lacks this layer and thus had limited features.
The layer will increase the throughput of the Bluetooth data transfer. The 3.0+HS version of Bluetooth has an additional 802.11 Protocol Adaptation Layer (PAL), which was absent in the previous versions. Bluetooth 3.0+HS was developed by the Bluetooth SIG and WiMedia Alliance in 2009.
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