本人新人：
1. Zigbee和WiFi在国内使用的时候都是处于2.4G的频带上，是否存在相互干扰的问题：
2. TI最新的Zigbee的方案能否推荐一下？
BLE采用跳频抗干扰。另外，BLE对应芯片是CC2540 CC2541。
http://www.ti.com/product/cc2540
http://www.ti.com/product/cc2541
Bluetooth low energy operates in the unlicensed 2.4 GHz band together with WiFi, Bluetooth Classic, Zigbee and others. Bluetooth low energy uses 40 Radio Frequency channels. There are two types of BLE channels: advertising and data channels. Advertising is done on three physical channels, shown in red. These channels have been chosen to minimize overlap with the most commonly used WiFi channels (as shown in the figure).
The advertising channels are used to discover devices, establish connections and for broadcasting messages, whereas data channels are used for bidirectional communication between connected devices.
A frequency hopping mechanism is used in order to avoid possible interference and wireless propagation issues, such as fading and multipath.
The fact that Bluetooth low energy can run on a single coin cell battery for more than a year is one of the key benefits of the technology. This is mainly because of a shortened packet format and overhead, which means that the throughput is lower for Bluetooth low energy compared Bluetooth classic and WiFi.
