蓝牙低能量 - 设备转到交易深度睡眠 [英] Bluetooth low energy - Devices go to deep sleep in transactions
问题描述
当我读这本书有关数据交易，
When I read the book about the Data Transactions,
据提到，一旦连接后，两个设备都可以进入交易的深睡眠。
It mentions that once the connection is made, both devices can go into deep sleep between transactions.
我不很明白这是如何在交易过程中发生的。任何人都可以解释一下吗？
I dont quite understand how this could happen during the transaction. Can anyone explain this?
感谢
推荐答案
蓝牙和蓝牙低功耗之间的主要区别在于，后者不是用于发送长的数据流进行了优化。换句话说，蓝牙低功耗是为中偶尔发送数据的块的每个优化。发送数据的频率是依赖于应用的，并可以由用户进行修改。例如，一个BLE设备可以发送数据的块（例如，当前的温度读数）每五分钟一次，然后醒来再次发送数据之前入睡（其中有非常最小功耗），等等。此占空比是BLE的低能因素的主要原因之一，而不是传统的蓝牙。
A primary difference between Bluetooth and Bluetooth Low Energy is that the latter was not optimised for sending long data streams. In other words, Bluetooth Low Energy was optimised for sending blocks of data every "once in a while". The frequency of sending the data is application-dependent and can be modified by the user. For example, a BLE device can send a block of data (e.g. current temperature reading) once every five minutes, and then go to sleep (where there is very minimum power consumption) before waking up to send data again, and so on. This duty cycle is one of the main reasons of the Low Energy factor of BLE as opposed to traditional Bluetooth.
正如你可以在上面的图片中看到，BLE数据传输是数据卡盘的形式，和BLE装置可以去那些块之间传输睡觉。
As you can see in the image above, BLE data transfer is in the form of data chucks, and the BLE device can go to sleep between the transmission of those chunks.
有几个有用的资源在那里对BLE的理论方面，我特别发现以下两个有用的：
There are a couple of useful resources out there on the theoretical aspect of BLE, and I particularly found the following two useful:
- CSR: Bluetooth 4.0: Low Energy
- LitePoint: Bluetooth Low Energy
我希望这会有所帮助。
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