![]() ![]() ![]() The core of Bluetooth 3.0 is AMP (Generic Alternate MAC/PHY), a new alternate radio frequency technology that allows the protocol stack to dynamically select the correct radio frequency for any task. So V3.0 realized video recorder to HDTV, PC to PMP, UMPC data transfer to and from the printer easily. ![]() Such rate is as high as 24Mbps, which is 8 times that of V2.0. Bluetooth 3.0 + HS (2009)īluetooth 3.0 adds an optional technology, which enables Bluetooth to call 802.11 WiFi for high-speed data transmission. Further more, V2.1 supports NFC near-field communication, as long as two Bluetooth devices with built-in NFC chips are close to each other, the pairing password will be transmitted without manual entry required. In addition, the new SSP (simple and secure pairing) function improves the pairing experience of Bluetooth devices, while improves the using experience. At the same time, EDR reduces power consumption by reducing work liability cycles, in addition, V2.0 can connect more devices due to increased bandwidth.īluetooth 2.1 adds the Sniff Subrating function, which extends the time interval for sending signals for mutual confirmation between devices from 0.1 seconds in the old version to about 0.5 seconds, thereby greatly reduces the workload of the Bluetooth chip. V2.0 supports duplex mode: For example, you can perform voice communication while transmitting documents/high-quality pictures. The new EDR (Enhanced Data Rate) technology improved the ability of multi-tasking and simultaneous operation of multiple Bluetooth devices, allowing the transmission rate of Bluetooth devices to reach 3Mbps. Bluetooth 2.0+EDR (2004)īluetooth 2.0 is an improved version of V1.2. In addition, four new features introduced:ġ) AFH (Adaptive Frequency Hopping) reduces interference problems between Bluetooth products and other wireless communication devices.Ģ) eSCO (Extended Synchronous Connection-Oriented links) provides QoS audio transmission to further meet the needs of high-end voice and audio products.ģ) Faster Connection shortens the time of re-searching and reconnecting, making the connection process more stable and faster.Ĥ) Supports Stereo sound effects, but can only worked in simplex mode. However, it is susceptible to interference from products of the same frequency, which affects the quality of communication.īluetooth 1.2 addresses the security issues exposed by V1.0, improving the anonymous method, and adds the function of shielding the hardware address of the device (BD_ADDR) to protect users from identity sniffing attacks and tracking, and is backward compatible with V1.1. Therefore, version 1.0 was not immediately widely used, and related Bluetooth devices were also very expensive.īluetooth 1.1 adopts the IEEE 802.15.1 standard, which defines the physical layer (PHY) and media access control (MAC) specifications for wireless connections between devices, with a transmission rate of 0.7Mbps. At the same time, during the process of handshaking between two devices, the address of the Bluetooth hardware (BD_ADDR) will be sent out, causing the risk of data leakage. For example, their products aren’t interoperable with each other. The early Bluetooth1.0 includes A and B, and there are many problems. All Versions of the Bluetooth Bluetooth 1.0: Early Exploration (1999) It has changed and developed over the years, and here we come to sort out the characteristics of the different versions of Bluetooth. It establishes a connection among fixed and mobile devices to exchange data without cables. Bluetooth is a technology used for wireless data and short-range communications.
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