您将学到什么：
- The key technical benefits of the latest Z-Wave Long Range specification.
- Z波远程与Z-Wave相比。
2020年9月，Z-Wave联盟首次宣布了新的Z-Wave长距离（Z-WAVE LR）规范，并在12月宣布，新规范已准备好用于第三方硅认证计划开发。还宣布了Z-Wave LR的首次实施，现在通过硅实验室获得了通过固件升级到Z-Wave 700平台上现有和新客户的固件。
本文分解了Z-Wave LR的主要技术优势，并探讨了最新规范和Z-WAVE之间的差异。
首先，Z-Wave长距离到底是什么？
Engineered to provide significantly extended wireless range and support robust networks, Z-Wave LR extends Z-Wave connectivity beyond the boundaries of the home. It accelerates the adoption of Z-Wave in other verticals such as light commercial, hospitality, and multi-dwelling units (MDUs).
Z-Wave Long Range is an extra 100-kb/s DSSS OQPSK modulation addition to the Z-Wave protocol. The modulation is treated as a fourth channel, allowing gateways to add LR nodes to the existing Z-Wave channel scanning. At this time, Z-Wave LR is only available for the U.S. market. However, the Technical Workgroup is evaluating and testing to ensure compliance and be able to support Europe and APAC regions in the future.
由新的Z-Wave联盟技术和认证工作组开发和管理，更新的规范旨在引导Z-Wave连接的新时代，同时仍然遵守Z-Wave技术核心价值，例如向后兼容和互操作性(see figure)。更新的规范促进了许多关键的技术优势，最佳总结为“增加范围和覆盖范围，提高可伸缩性，优化的电池寿命和互操作性”。
增加范围和覆盖范围
Perhaps the most exciting benefit of Z-Wave LR is the monumental increase in transmission range. The specification supports a maximum output power of 30 dBm, which can be leveraged to bolster range capabilities and support future transmission distance up to several miles. In the very first implementation of Z-Wave LR—from Silicon Labs through the 700 Series platform—a proven transmission distance of 1-mile (1.6 km) direct line of sight has been achieved utilizing +14-dBm output power.
Prior to Z-Wave LR, multiple signal repeaters would need to be installed within a network to achieve transmission distance beyond the boundaries of the home. Z-Wave LR eliminates the need for these repeaters, unlocking new potential for Z-Wave networks and making it easier than ever before to enroll smart home and IoT devices deployed at the edge of the network.
Increased Scalability
随着变速箱范围的显着提升，Z-Wave LR还将单个智能家庭网络上的可扩展性提高到4,000个节点。与Z-WAVE（232个节点）相比，这表示网络节点可用性增加了20倍。较大的网络支持可以在单个网络上添加潜在的数千个Z-WAVE设备，从而进一步扩展了Z-Wave技术的可能性。
Optimized Battery Life and Backwards Compatibility
Z-Wave LR offers up to 10-year battery life on a single coin-cell battery by leveraging dynamic power control. This new feature enables the Z-Wave Long Range device to automatically adjust and optimize the radio output power at every transmission.
动态功率控制对于支持未来的卫星Z-WAVE设备安装至关重要。电池寿命增加的传感器最引人注目的用例之一是能够将它们部署在难以到达的地方，例如阁楼，地下室或墙壁后面，以支持不断发展的应用程序（例如上下文意识和IoT技术）。
Z-Wave and Z-Wave LR also are designed to coexist on the same network. LR network nodes reserved for new or existing Z-Wave mesh-network devices preserve both backwards and forwards compatibility and sustain interoperability between certified Z-Wave devices.
其他差异：Z波与Z-Wave长距离
While the key technical benefits of Z-Wave LR are quite clear, a number of technical differences exist between the two specifications that are equally important to highlight. Most notable is Z-Wave LR’s use of a star network topology vs. the traditional mesh topology found within Z-Wave networks today.
星网与网络网络
Z-Wave LR devices operate on a star network topology that features the gateway/hub at a central point and then establishes a direct connection to devices. The addressing space in Z-Wave Long Range is increased to 12 bits, enabling Z-Wave LR networks to support up to 4000 nodes.
星际网络和网格网络之间的关键区别是直接网关/枢纽 - 设备连接。传统上，网格网络允许信号从节点跳到节点，直到达到预期目的地为止。
尽管网络拓扑是不同的，但Z-Wave能够支持网络网络和星际网络。Z-Wave LR和传统的Z-Wave节点都可以在同一网络中共存，从而可以多种多样，并组合Z-Wave设备和Z-Wave LR设备。
To unlock the full potential of Z-Wave LR, both the gateway/hub and the installed Z-Wave device must feature Z-Wave LR. So long as both the gateway/hub and connected device feature the Z-Wave LR specification, that network has the capability to support both a mesh network and star network.
Additional technical differences between the two specifications are spelled out in the桌子。
自2020年9月宣布提出更新的规范以来，Z-Wave Alliance的技术工作组一直很难进行工作测试和部署Z-WAVE LR网络。随后，它发现了其他进步，基准和福利。
在Z-Wave联盟的新组织框架和Z-WAVE LR规范的现已从其Z-Wave 700平台上获得的Z-Wave LR规范，Z-Wave Technology的未来看起来非常有前途。
要跟上Z波，请访问http://www.z-wavealliance.org。
