Things infrastructure, including perception, transmission, applications, transmission technology is because of the arrival of 5G, eye-catching! Of course, in the short-range wireless transmission technology, most people may not know, Zigbee technology is actually a very practical, very efficient wireless connection.
ZigBee technology is applied to an in short range, wireless communication techniques between various electronic devices at a low transmission data rate. Information ZigBee name comes from the use of communication bees survival and development, the position to inform discovered by jumping dance ZigZag shape new food source of bees, distance and direction, as a new generation of wireless communication technology Name .
ZigBee past, also known as "HomeRF Lite", "RF-EasyLink" or "FireFly" radio technology, now collectively called Zigbee technology. Zigbee 802.15.4 wireless network is a set of standards developed by the IEEE approved the technical standards of safety and application software. With other wireless standards such as 802.11 or different 802.16, Zigbee and 802.15.4 maximum transmission rate of 250Kbps limited carrying data traffic. ZigBee V1.0 version of the network, along with the standard lighting control device description was launched by the end of 2004, described in other application areas and related equipment will be released in subsequent years.
Zigbee PRO 2017 release, the latest version aimed at achieving interoperability between intelligent devices and flagship mesh networking technologies interoperable. Zigbee PRO is a network layer technology, to support interoperation device to obtain full stack Zigbee 3.0 certification. Zigbee is the basis of things and in the future, changes in product life, work and play in the creation and evolution of open standards to provide a common, comprehensive and open Internet of Things solutions.
For frequent communication connection by reinforced concrete and steel bolt nuisance buildings, business parks, and facilities for large cities, Zigbee is an ideal wireless solution for building large networks of things, the deployment of smart cities in the field of home, smart buildings and smart the great potential.
其实平时我们更多的接触到的无线技术是WiFi技术，目前广泛应用于近距离室内外的无线通信，那么两者之间的关系是怎样呢？
我们从几个方面做下ZigBee-WiFi 的对比及各自优势：
1.硬件内存需求对比：ZigBee ： 32~64KB+ ；WiFi ： 1MB+ ； ZigBee 硬件需求低。
2.电池供电上电可持续时间对比：ZigBee ： 100~1000 天；WiFi ： 1~5 天； ZigBee 功耗低。
3.传输距离对比（一般用法，无大功率天线发射装置）：ZigBee ： 1~1000M ；WiFi ： 1~100M ； ZigBee 传输距离长。
4.ZigBee 劣势：网络带宽对比： ZigBee ： 20~250KB/s ； WiFi ： 11000KB/s ；ZigBee 带宽低，传输慢。
相同点：
1. 二者都是短距离的无线通信技术；2. 都是使用 2.4GHz 频段为主 3. 都是采用 DSSS 技术；
ZigBee 与WIFi应用场合不同。 ZigBee 用于低速率、低功耗场合，比如无线传感器网络，适用于工业控制、环境监测、智能家居控制等领域。而WiFi ，一般是用于覆盖一定范围（如 1 栋楼）的无线网络技术（覆盖范围 100 米左右）。表现形式就是我们常用的无线路由器。在一栋楼内布设 1 个无线路由器，楼内的笔记本电脑（带无线网卡），基本都可以无线上网了。
ZigBee 作为一种新兴技术，自 2004 年发布第一个版本以来，正处在高速发展和推广当中；目前因为成本、可靠性方面的原因，还没有大规模推广； WiFi 技术成熟很多，应用也很多了。Zigbee技术目前能够同时支持两个ISM频段的网状网络：1.满足地区要求的sub-GHz 800-900 MHz频段 2.满足全球通用的2.4 GHz频段。
这一双频段选项可为希望使不同建筑物、城市和住宅内的产品实现互联的制造商、市政当局以及消费者提供更大的灵活性和更多的设计选择。产品厂家可以利用ZigbeePRO 构建单一网络的设备支持多个频段，以应对周围物理环境的挑战。融合sub-GHz功能后，物联网网络能满足多种用途的需求，包括智能户外照明，零售场地和数据中心等设施对大量环境条件的监测，以及应对恶劣环境。
对于家庭安全和自动化、智能计量和连接照明等等这些低速率的应用场景， Zigbee PRO 网络规范意味着更长距离，更低的功耗和更低的运营成本。到2020年，美国市场将售出逾4.42亿台消费类联网设备，包括娱乐、移动、医疗和智能家居等联网设备。随着互联产品数量和广度的发展，物联网市场已经度过了早期尝试阶段，现在网络可靠性变得至关重要。
2020年之前，英国将在政府的主导下把智能电表推广到约3000万户家庭，以实现能耗的节约和能源生产的减少。预计这一举措将带来高达150亿美元的净收益。 Zigbee PRO 的缘起，就是商业、能源和工业战略部（原能源与气候变化部）推行的这一智能电气/燃气表项目要求同时支持2.4 GHz和sub-GHz 的Zigbee设备（据统计应用Zigbee技术的每个家庭平均就有5个节点）。
这与国内火爆的智能表以NB-IOT 为主有很大差别！
2019年1月4日- Zigbee联盟和Thread集团共同发布Dotdot 1.0标准和Dotdot over Thread认证程序，标志了达成物联网互操作性的重要里程碑。
智能产品开发者将首次可以放心地在低功耗IP网络上应用成熟、开放且可认证的互操作性语言，以减少产品开发风险和障碍，赋能新应用程序，并通过逆转物联网的碎片化趋势而提升消费者的体验。当下的智能设备讲着不同的语言（或者用更技术术语表示：使用着不同的“应用层”），很难提供无缝体验。
Zigbee By providing open integration and application layer common good solution to this problem, the application layer can seamlessly connect products from many different vendors, and has been supported by many well-known smart home products. Dotdot using this common language equipment, so that it can run on low power IP network - will extend this approach to the verified application that can benefit from IP connection.
With Dotdot over Thread, smart home vendors not only ensures reliable user experience to drive growth and maintain customer relationships directly connected via an IP network while maintaining its equipment. Things physical connection are varied, depending on the scene and will demand a corresponding variety of wireless connections, Zigbee technology future ability to occupy a larger market, but also the test of the market itself. As things first appeared in the transport layer, and a low-power Zigbee large connection-oriented technology, there are clear market demand, but also the important connection of sensors and smart home products.
With the new changes in demand, and constantly competing new technologies, Zigbee technology itself is also rising, introduced a new version of the standard, is bound to become an important part of the transport layer of things! Things are all interconnected, wireless transmission technology is also flourishing, strengths and weaknesses, who can become the next king, also need to continue to evolve, perhaps the last third of the world is perhaps a new technology standard system can become king. As the user experience, who most cost-effective, with who!
Things will be the future of the world, let's meet 19-21 November 2019, similar to 2019 (Third) Global Assembly of things - looking thinker!
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Disclaimer: This article is "insight - Internet of Things 1000 asked" series sixty-one, aimed at the networking industry hopes to be analyzed and shared through systematic and professional industry perspective on the current status of development and economic potential. IOT things, all things Internet, interconnection of all things.
Author: Wang Zhengwei Zhongguancun Industry Alliance Secretary-General 51CTO blog - Novosti sink and micro authorized the release will move Yuan Shuai