Simplifying a complex technology is always a worthwhile process, even when it just involves a naming convention. For example, now we can stop trying to remember an alphabet soup of numbers and letters like 802.11ax and can simply say Wi-Fi 6. While the name change is welcome, it’s the innovations that the latest wireless standard brings to enterprise networks that will make a significant difference in your journey to digital business transformation.
As organizations become ever-more dependent on the ability to continuously access data, applications, and people via wireless mobile devices, Wi-Fi 6 brings advantages in speed, high-density capacity, IoT compatibility, and application performance. Integrating Wi-Fi 6 into access points (APs) and wireless controllers brings a new level of efficiency to networks that support real-world business conditions such as a mobile workforce in high-density environments and IoT deployments.
In this blog post, we’ll discuss the main technology changes in Wi-Fi 6 standard and the business benefits for:
To understand how Wi-Fi 6 will enhance your organization’s digital processes, let’s briefly look at four technical changes in the new standard:
Two of the most significant changes involve how APs support a large number of devices in high-density environments. Wi-Fi 6 incorporates features found in 4G LTE cellular networks by upgrading access points to Orthogonal Frequency Division Multiple Access (OFDMA) from the older OFDM (minus the Access). OFDMA divides the 802.11 channel (20, 40, 80, 160 MHz wide) into hundreds of sub-channels, also known as Resource Units (RU).
The AP schedules multiple devices on the uplink as well by distributing the available RUs among different devices. The scheduled way of accessing the channel eliminates channel contention (as done in previous standards) among the users and increases the channel utilization. The improvements are especially significant in dense user environments.
Wi-Fi 6 also enables each AP to add a unique color—referred to as “Basic Service Set (BSS) Color”—to each transmitting channel. With 63 different colors available, coloring ensures that neighboring APs can all be assigned unique colors. With each AP transmitting a locally-unique color, a device can easily distinguish transmissions coming from its AP from that of a neighboring AP. This distinction enables a device to ignore a neighboring AP’s transmissions when attempting to transmit. Coloring leads to increased capacity by enabling simultaneous transmissions between APs on the same channel.
Another benefit of BSS Coloring is improving battery life for IoT and mobile devices. A device can ignore all transmissions with colors different than the color of the connected AP thereby increasing battery life. Both ODFMA and BSS Coloring increase the efficiency of Wi-Fi 6, not just the speed, although Wi-Fi 6 provides a significant speed increase as well via other means.
Device congestion was also a constant struggle with the previous standards as they were originally intended for internet surfing and email use in low-density situations. Today’s enterprises depend on applications that need high-bandwidth on both down- and up-links while operating in high-density and flash environments. To accommodate real-world uses and decrease congestion, Wi-Fi 6 works with both the 2.4 and 5 GHz bands to provide more channels and enable access points to pack even more data per packet. MU-MIMO (Multiple Users Multiple Input Multiple Output) enables simultaneous transmissions up to 8 users simultaneously, on both up and down links, as opposed to the previous limit of 4 users at a time only on downlinks. These enhancements translate to higher throughput, faster onboarding, less waiting, and smoother transfers among Wi-Fi zones.
Wi-Fi 6 is designed to benefit the growing number of mobile workers, many of whom carry multiple devices at a time, all seeking constant connectivity as they traverse buildings and campuses. Beyond the benefits to digital nomads, the world of IoT is also going to expand significantly with Wi-Fi 6, which can meet the diverse operating requirements of IoT devices. For example, some IoT sensors only require intermittent connections to transmit low-bandwidth telemetry. In those cases, saving power and extending battery life is essential.
Augmented and virtual reality applications will undoubtedly become more prevalent as soon as the speed and low latency (1+ Gbps and <10 ms respectively) of Wi-Fi 6 becomes widespread or at least available in specific locations for critical applications, such as hospitals employing remote diagnostics and imaging. Wi-Fi 6 makes new high-bandwidth applications possible using a combination of OFDMA with QoS aware schedulers, up to eight spatial streams, and wide channels of 80 and 160 MHz.
Wi-Fi 6 isn’t quite here yet as the standards committee has not finalized the documents as of this publication. However, planning to deploy the infrastructure to support the new wireless standard should start now. Now is the time to start thinking of how you can improve your business processes with a highly-efficient wireless fabric woven throughout your enterprise. Whether you are planning for a campus-wide wireless connectivity project, new IoT deployments, or improving application quality of experience for a mobile workforce, Wi-Fi 6 is going to provide a robust foundation for business transformation.
Published with permission from blogs.cisco.com.