Zigbee和WiFi的互相干扰

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？

都在2.4G频段，肯定会存在干扰。Zigbee采用了几种方法来抗干扰。一是采用了DSSS直序扩频，二是采用了能量扫描选择信道，三是CSMA/CA，四是重发确认。

另外WIFI频带虽宽，还是有些缝隙的。zigbee有16个channel.你可以选择如15，25等WIFI能量较小的频道工作。

TI zigbee solution.

http://www.ti.com/lsds/ti/analog/zigbee.page

除了HA和SE,最新的ZLL协议栈也可免费下载了。

谢谢。

那么Bluetooth的 low Energy 版本（贵公司的CC2570，CC2571）是不是也运行在2.4频带上？和WiFi有没有相互之间的干扰？

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.

HA和ZLL的协议栈可以下载，但是SE的好像没有。

在http://www.ti.com.cn/tool/cn/z-stack搜索swrc126.zip

这个版本有SE1.1的sample