为开发选择合适的无线电

蓝牙Bluetooth®技术采用非授权2.4GHz工业、科学及医疗(ISM)频段,同时支持多种无线电选项,满足开发者创建的产品在相应市场中对于连接性的独特需求。

无论是在智能手机和音箱之间传输高品质音频,还是在平板电脑和医疗设备之间传输数据,亦或是在楼宇自动化解决方案中的数千个节点之间传输信息,低功耗蓝牙(Bluetooth Low Energy)和基础速率/增强资料速率(BR / EDR)无线电都能够满足全球开发者的独特需求。

低功耗蓝牙(Bluetooth Low Energy

低功耗蓝牙(Bluetooth Low Energy)无线电适用于极低功耗的应用场景,并针对数据传输解决方案进行了优化。为保证在2.4 GHz频段上稳定运行,它采用了稳健的自适应跳频方式,可以通过40个信道传输数据。而且低功耗蓝牙无线电为开发者提供了极大的灵活性,包括可支持从125 Kb / s到2 Mb / s传输速率的多重PHY选项,以及从1mW到100 mW的多个功率等级。不仅如此,它还支持政府级别的高度安全选项,以及多种网络拓扑,如点对点、广播和mesh。

蓝牙基础速率/ 增强资料速率(BR / EDR)

蓝牙蓝牙基础速率/ 增强资料速率(BR / EDR)无线电适用于低功耗应用场景,并针对数据流应用(如无线音频)进行了优化。它还采用了稳健的自适应跳频方法,可以通过79个信道传输数据。蓝牙BR / EDR无线电还包括支持从1 Mb / s到3 Mb / s传输速率的多种PHY选项,以及从1mW到100 mW的多个功率等级。此外,它还支持多重安全选项和点对点网络拓扑。

Bluetooth Low Energy (LE) Bluetooth Basic Rate/
Enhanced Data Rate (BR/EDR)
Optimized For… Short burst data transmission Continuous data streaming
Frequency Band 2.4GHz ISM Band (2.402 – 2.480 GHz Utilized) 2.4GHz ISM Band (2.402 – 2.480 GHz Utilized)
Channels 40 channels with 2 MHz spacing
(3 advertising channels/37 data channels)
79 channels with 1 MHz spacing
Channel Usage Frequency-Hopping Spread Spectrum (FHSS) Frequency-Hopping Spread Spectrum (FHSS)
Modulation GFSK GFSK, π/4 DQPSK, 8DPSK
Power Consumption ~0.01x to 0.5x of reference
(depending on use case)
1 (reference value)
Data Rate LE 2M PHY: 2 Mb/s
LE 1M PHY: 1 Mb/s
LE Coded PHY (S=2): 500 Kb/s
LE Coded PHY (S=8): 125 Kb/s
EDR PHY (8DPSK): 3 Mb/s
EDR PHY (π/4 DQPSK): 2 Mb/s
BR PHY (GFSK): 1 Mb/s
Max Tx Power* Class 1: 100 mW (+20 dBm)
Class 1.5: 10 mW (+10 dbm)
Class 2: 2.5 mW (+4 dBm)
Class 3: 1 mW (0 dBm)
Class 1: 100 mW (+20 dBm)
Class 2: 2.5 mW (+4 dBm)
Class 3: 1 mW (0 dBm)
Network Topologies Point-to-Point (including piconet)
Broadcast
Mesh
Point-to-Point (including piconet)

* Devices shall not exceed the maximum allowed transmit power levels set by the regulatory bodies that have jurisdiction over the locales in which the device is to be sold or intended to operate. Implementers should be aware that the maximum transmit power level permitted under a given set of regulations might not be the same for all modulation modes.

Related Resources

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