Zigbee PRO是首个支持2.4GHz和sub-GHz跨频段通信的多频段、低功耗无线网状网络

 

为何选择Zigbee PRO

Zigbee PROZigbee网络和产品的网络基础。 独立使用,可以构建强健的私有物联网。 与Zigbee Cluster LibraryZigbee技术核心的应用层)配合使用,通过添加网状网络、安全机制以及应用框架,增强扩展了IEEE 802.15.4标准,从而成为全栈、可认证、可互操作的Zigbee解决方案。

Zigbee PRO是开发人员最为常用的选择,大多数联盟开发的标准都采用了这一规范。 它使用IEEE 802.15.4射频,为大型网络提供易用和先进的支持,并为需要低功耗连接的产品提供简单且不费电的处理能力。 Zigbee PRO提供2.4GHzsub-GHz设备的多频段功能,以及可选的创新功能Green Power,可将能量捕获或自供电设备连接到Zigbee PRO网络。

Zigbee PRO 特点

  • Cross band communication across 2.4GHz and sub-GHz bands with multi PHY support
  • 多频段,支持2.4GHz和sub-GHz跨频段通信
  • 使用基于IEEE 802.15.4的全球通用2.4GHz频段
  • 适合特定区域的915Mhz和868Mhz频段
  • 频率敏捷(Frequency agile)解决方案适用2.4GHz频段的16个信道和sub-GHz频段的90个信道
  • 具备适用所有设备类别的省电机制,并支持无源设备
  • 具备应用层确认的发现机制
  • 具备应用层确认的配对机制
  • 网状拓扑和个人局域网(PAN)通信
  • 多种传输选项,包括广播,组播和单播
  • 安全密钥生成机制
  • 采用业界标准的AES-128安全方案
  • 支持联盟标准或制造商私有协议
  • 包括功率测量功能以减少功率输出,使得设备能够精确地在所需的功率水平进行通信。
  • Sub-GHz信道传输距离可达1公里。

常见问题

什么是Zigbee规范?

Zigbee规范提供的完整网状网络能够在单个网络中支持数百个设备。Zigbee PRO 2015采用了Zigbee PRO的最新规范,并从全球已部署的数千万台设备中吸取了经验。 Zigbee PRO已经成为物联网应用所需的低功耗网络的主要选择,为由数千个设备组成的大型网络提供先进易用的支持。

Zigbee规范所基于的IEEE 802.15.4有哪些技术属性?

Zigbee充分利用强大的IEEE 802.15.4无线通信标准,使用通用的无执照频段上运行,包括2.4GHz(全球),915Mhz(美洲)和868Mhz(欧洲)。在2.4GHz16信道),915-921Mhz27信道)和868Mhz63信道)可实现的数据传输速率分别为250Kbs10kbs100kbs。根据功率输出和环境特性,一般传输距离的范围从10100米,而Sub GHz信道传输距离可达1公里。

Zigbee如何弥补2.4GHz频段可能的干扰?

Zigbee产品可以使用2.4GHz频段16个独立的带宽为5MHz的信道。其中有几个与美国和欧洲版本的Wi-Fi信道不重叠,Zigbee也采用了IEEE 802.15.4定义的CSMA-CA协议,降低了干扰其他用户的可能性,另外Zigbee使用自动重传数据来确保网络的稳健性。由于Zigbee产品的占空比通常非常低,传输的分组数据单元相对较少,降低了传输不成功的可能性。由于监管要求,zigbee已经减轻了对sub-GHz的干扰。 Zigbee包括功率测量功能以减少功率输出,使得设备能够精确地在所需的功率水平进行通信。同时,在网格中包含多个节点的情况下,这样做会减少节点之间的干扰。还限制了无线电活动以符合监管要求。

Zigbee如何解决无线通信的可靠性问题?

Zigbee专为主流商业应用中常见的恶劣射频环境而设计。利用802.15.4标准的直序扩频(DSSS)技术,其特点包括冲突避免,接收机能量检测,链路质量指示,空闲信道评估,通信确认,安全性,支持保证时隙和数据包有效度。 Zigbee网络为产品制造商提供高度可靠的无线通信解决方案。

Zigbee网络可以支持多少个节点或设备?

Zigbee的寻址方案能够支持单个网络包含数百个节点,并且可以将多个网络协调器连接在一起以支持极其庞大的网络。 Zigbee网络的大小理论上最终取决于选择哪个频段,网络中的每个设备需要多长时间进行通信,以及应用程序可以容忍多少数据丢失或重传。

Zigbee PRO 2017仅提供联盟成员 点击此处加入联盟

Zigbee PRO 2015 非联盟成员可填写下表下载

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The Zigbee Alliance is the foundation and future of the IoT. Established in 2002, our wide-ranging global membership collaborates to create and evolve universal open standards for the products transforming the way we live, work, and play. With our members’ deep and diverse expertise, robust certification programs, and a full suite of open IoT solutions, we are leading the movement toward a more intuitive, imaginative, and useful world.