What 802.11ax wireless standards mean for your network?

802.11ax standard publication will pave the way for next-generation wireless technology, but what does this mean for the corporate network? Today, more and more families are turning to online job application streaming model. Therefore, the need to continue the development of wireless Internet technology, to meet our growing use of high-definition 4K streaming and cloud-based services are. The future to address this, the Association (IEEE) Electrical and Electronics Engineers demand by publishing 802.11ax: efficient WLAN certification . 802.11ax is an update to a previous wireless standard 802.11ac to meet the needs of future use. The wireless LAN will face two major challenges in the coming decade. First, the wireless network will become an increasingly dense network environment, because the installation of additional access points to extend network coverage and increase the transmission rate. Secondly, the Internet will increase the demand for throughput in the coming years to high-definition audio and video content as well as the development of cloud-based services. Today, many people already carry a number of Internet-connected devices, such as smart phones, smart watches and / or internet tablet, and is expected to increase the number of devices to carry. By 2020, the world will have nearly 31 billion Taiwan network-connected devices, the 2025 data will be doubled. It allows a large number of additional devices to connect to an existing network will lead to congestion and the need for organizations to deploy more access points to ensure satisfactory service, which will increase the density of access points. In such a dense environment, interference may occur, thus increasing the packet error rate, i.e., data transmission error is encountered in the degree of the network and access the same channel by preventing the adjacent WLAN, within a given region to reduce the concurrent transmission times. In the sort of scene, deployment, optimization and coordination of a large number of access points can be a challenge. This is particularly true in the case of Internet Service Providers (ISP) in a relatively small area to provide Internet access for large groups of people. " 802.11ax function will be deployed family, multi-tenant apartments and offices as well as corporate and public places application brings higher performance " IEEE 802.11 Working Group Chairman Dorothy Stanley said. In this intense environment, coordination intelligent access point may improve spatial reuse rate, and effective use of media access protocol can support many devices connected simultaneously. 802.11ax can be considered for the Internet of Things (IoT) design, where multiple devices need to access the Internet on a regular basis without losing the connection, in order to maintain function. "Will support the new low-latency use cases and control systems, including the Internet of Things, including," Dorothy Stanley said. 802.11ax will be a new WLAN, designed for the 2.4 GHz and existing the 5 GHz band, and adding an additional band between 1 and 7 GHz. While the nominal data rate than IEEE 802.11ac device 802.11ax 37% higher, but the new revision of the average user throughput is expected to be increased by four times. This is due to the more efficient spectrum utilization and MU-OFDMA (orthogonal frequency division multiple user multiple access) technology. According to 802.11ax developers say, interactive and high-definition video - such as multi-party video conferencing and virtual reality - are expected to dominate the future of Internet use. Both require multi-gigabit throughput. Multimedia Internet use Use of the Internet are increasingly turning to multimedia format with audio and video content. In addition, file storage, management, and with the cloud is becoming the standard content management and generation system. The prediction of future scenarios and expected use cases, IEEE 802.11ax contains three major amendments: 1, coexistence: WLAN need to coexist with other wireless networks that can also be run in the same environment, you can also co-exist with the licensed device. 2, higher throughput: improve the system throughput and the user needs more efficient use of channel resources. 3. Energy efficiency: the growing demand for access points will need to improve low-power hardware architecture and low-power features. In addition, it 802.11ax also allowed to go through the previous version of the standard certification of equipment backward compatibility. While connecting different authentication devices will reduce the efficiency and functionality, but must maintain backward compatibility to ensure that its main functions - connectivity. To achieve these goals, IEEE 802.11ax introduces new features for wireless devices: Spatial reuse: CSMA / CA (Collision Avoidance having carrier sense multiple access), conserved the CCA (Clear Channel Assessment), and a combination of a high transmission rate can be limited in some scenarios allow spatial reuse. 时间效率：由于CSMA / CA功能可以缩短节点每次访问信道时花费的时间来传输数据，因此IEE 802.11ax包含多种解决方案来减轻这种影响。 频谱共享：WLAN的计划外部署导致频谱占用分散，导致相邻WLAN的效率低下和干扰，从而引入动态混淆和MU-OFDMA。 多个天线：除了下行链路MU-MIMO（多用户 - 多输入和多输出）之外，现在还有一个上行链路MU-MIMO，顾名思义 - 允许多个用户同时下载和上传数据。 所有这些结合在一起，通过改进空间重用和更广泛的频谱利用，达到了提高性能的目标。 “802.11ax是一种更有效地利用频谱的方式 - 通道中的子载波分区允许您传输更多数据，”全球无线网络聚合器iPass的首席技术官Blaz Vavpetic解释说。 互补网络 有些人可能认为802.11ax是5G移动通信网络的竞争对手。但是，将其描述为互补网络会更准确。每个都有自己独特的优势，在不同的环境中运行最佳。 “现在每个人都在乘坐5G炒作列车，但是当你将其分解为密度、效率和功率/性能的特性时，那么802.11ax会检查所有这些车厢”Vavpetic说。 也就是说，针对一个特定的场景，其中一个比另一个更合适。例如，在更高频谱下运行的5G网络可能最适合高带宽和低延迟的用例，例如在站点应用中。但是，5G在较高频率下也容易受到干扰。 “一旦你开始将这些设备投入运动并且他们开始在无线电频率环境中遇到破坏性物体，那么5G服务开始动摇，”Vavpetic说。 Wi-Fi 6（包括802.11ax）将为WPA3的采用铺平道路。 WPA3为以前开放和未加密的Wi-Fi网络带来了更高的安全性。以前，在许多Wi-Fi热点是开放且未加密的情况下，WPA允许使用256位AES加密其接口，这本质上更安全。 “作为服务提供商，我们汇总了全球约65,000,000个热点，并使用VPN提供空中接口加密;但在一个人人都是Wi-Fi6的世界里，你可以获得AES加密的好处，“Vavpetic说。 802.11ax的一个关键优势是它不是技术交换，而是技术升级。为了充分利用802.11ax功能，公司无需更换现有的网络基础架构，也无需更改管理服务的方式。它只是在现有的无线网络结构之上工作。 鉴于802.11ax的功能得到改进，许多公司可能希望推进其设备战略，以便更快地获得802.11ax设备。虽然在某些情况下这可能是一种可以理解的硬件策略，但通常建议组织维护其现有的硬件计划，当它们的生命周期结束时再将其接入点升级到802.11ax设备。 “任何人都不会截断他们的生命周期进行升级，”Vavpetic说。 “但是当他们通过并且他们的预算允许时，他们将采用802.11ax升级” 当然，直到网络上的设备通过802.11ax认证才能感受到802.11ax网络的全部优势。然而，这个新的Wi-Fi标准经历了重大的挑战和延迟，因为在2018年7月IEEE委员会通过之前，草案标准的前两个版本被拒绝了。一旦标准被批准，网络随着经过认证的设备扩展到企业环境，将开始升级到802.11ax。斯坦利表示， “预计在2020年1月1日批准，2018/2019年产品出货”考虑到这一点，服务提供商不一定需要加快他们的投资周期，因为802.11ax兼容设备从一开始就不会存在。相反，标准将会逐渐扩散，这将逐渐传播技术。

附注：本文翻译了computerweekly的What does the 802.11ax wireless standard mean for your network? 原文连接：https://www.computerweekly.com/f ... an-for-your-network