Bluetooth 4.0 is the latest Bluetooth version in 2012. It is an upgraded version of 3.0. Compared with version 3.0, it is more power-efficient, low-cost, low latency of 3 milliseconds, long effective connection distance, AES-128 encryption, etc.; usually used in Bluetooth headsets, Bluetooth speakers. And other equipment.
The Bluetooth SIG announced on July 7, 2010 that it officially adopted the Bluetooth Core Specification Version 4.0 and initiated the corresponding certification program. The member manufacturers can submit their products for testing and will receive the Bluetooth 4.0 standard certification. This technology has extremely low running and standby power consumption, and even can work continuously for several years using a coin cell battery.
Bluetooth 4.0 is a supplement to the Bluetooth 3.0+HS specification. It is specifically designed for wireless solutions that require high costs and power consumption. It can be widely used in many fields such as health care, sports and fitness, home entertainment, and security.
It supports two deployment modes: dual mode and single mode. In the dual mode, the Bluetooth low energy function is integrated in the existing classic Bluetooth controller, or the low power consumption stack is added to the existing classic Bluetooth technology (2.1+EDR/3.0+HS) chip, and the overall architecture is basically unchanged , so the cost increase is limited.
Single mode for highly-integrated, compact devices that use a lightweight link layer to provide ultra-low-power standby mode operation, simple device recovery, and reliable point-to-multipoint data transmission, enabling networked sensors The order of low-power Bluetooth traffic is scheduled during Bluetooth transmission, along with advanced energy-saving and secure encrypted connections.
The main features
Ultra-low peak, average, and standby mode power consumption
Use standard button batteries for one year or even years
Different manufacturers' device interactivity
Wireless coverage enhancement
Full backward compatibility
Low latency (APT-X)
Speed: Supports ultra-short data packets at a data transmission rate of 1 Mbps, with a minimum of 8 octets and a maximum of 27 hops. All connections use Bluetooth 2.1 added sniff subrating to achieve an ultra-low duty cycle.
Frequency hopping: Use adaptive frequency hopping common to all Bluetooth specification versions to minimize crosstalk with other 2.4 GHz ISM band wireless technologies.
Main control: Smarter, can sleep longer, only wake up when it needs to perform actions.
Delay: The minimum connection setting can be completed in 3 milliseconds and start transmitting data.
Range: Increase the modulation index. The maximum range can exceed 100 meters (depending on the application field, the distance is different).
Robustness: All packets use 24-bit CRC to ensure maximum protection from interference.
Security: Use AES-128 CCM encryption algorithm for packet encryption and authentication.
Topology: 32-bit addressing is used for each receive packet for each packet, theoretically connecting billions of devices; optimized for one-to-one connections and supporting one-to-many connections in a star topology; using fast connect and disconnect The data can be transferred within the mesh topology without maintaining a complex mesh network.
Bluetooth 4.0 integrates three types of specifications, including traditional Bluetooth technology, high-speed technology, and low-power technology. The biggest difference from the 3.0 version is low power consumption. “The 4.0 version has 90% lower power consumption than the old version, and it is more power-efficient,” said Lu Rongliang, technical marketing manager for the Greater China Region of the Bluetooth Technology Alliance. “With the Bluetooth technology from mobile phones, games, headsets, laptops and cars, etc. The expansion of application areas to new areas such as the Internet of Things and healthcare will require higher and lower power consumption. The 4.0 version enhances Bluetooth's low-power performance in data transmission."
The low-power version extends Bluetooth technology to some emerging markets that use button-cell power. Bluetooth low energy technology is an upgraded version based on the core specifications of Bluetooth low energy wireless technology. It lays the foundation for the development of numerous emerging markets such as clocks, remote controls, healthcare and motion sensors.
This technology will be applied to hundreds of millions of Bluetooth mobile phones, personal computers and handheld computers sold each year. Provides a long-lasting wireless connection with the lowest energy consumption, effectively expanding the coverage of related applications and opening up new network services. Low-power wireless technology features ultra-low peak periods, averages, and standby power consumption; ultra-low cost and lightweight features for device accessories and human interface devices (HIDs); and accessories for mobile phones and personal computers. The cost is minimized and the size is smaller; in addition to global application, it is more intuitive to use and can ensure the interoperability of multiple device connections.
Bluetooth 4.0 has a great impact on the personal fitness and health market. Whether on a treadmill or a gadget in the office. Fitbit Wireless Division, Nike's new Fuelband, Motorola MOTACTV, and fashion baseband are all good examples. And fitness watches also promise to use Bluetooth to track physical activity and heart rate.
In addition, Bluetooth 4.0 is still backward compatible, including the classic Bluetooth specification and the Bluetooth high-speed specification with a maximum speed of 24Mbps. The three specifications can be used individually or simultaneously.
This technology provides manufacturers and users with three wireless connectivity options, including traditional Bluetooth technology for multiple categories of consumer electronic products; Bluetooth for video, music and photo transmissions such as mobile phones, cameras, camcorders, PCs and televisions High-speed technology; and Bluetooth low energy technology for low-power sensing devices and new network services in the healthcare and health, personal devices, automotive and automation industries.
The application of Bluetooth technology has become more and more sophisticated. At present, many companies have introduced mini portable Bluetooth speakers. The Bluetooth speaker is a Bluetooth technology that is applied to traditional digital and multimedia speakers, allowing users to avoid the annoying wires and freely Listen to music in a way. Since the advent of Bluetooth speakers, the development of smart terminals has attracted widespread attention from users such as mobile phone tablets. Bluetooth technology has made it possible to wirelessize speakers. The sony creative creator Edifier sounder has launched a variety of Bluetooth speakers. The price ranging from 150 yuan to more than 3,000 yuan, you can let yourself have a super stylish and convenient Bluetooth speaker.