One of the most important components of the recent WiFi 6 pool announcement was the Licensing Incentive Framework for Technologies (LIFT) royalty payment structure. Several participants in our recent Wi-Fi 6 webinar described the rationale behind LIFT and how it operates. This post assembles their comments to deliver a 360-degree view of LIFT, including comments from Sisvel (as patent pool administrator), an economist, two founding patent owners of the pool, and an important pool licensee/licensor.

The Administrator’s View

Let’s start with comments from Andrea Rombolà, Program Manager for the Wi-Fi 6 pool, who described Sisvel’s motivation for creating LIFT. “LIFT was born out of our vision at Sisvel to create licensing programs that accelerate technology adoption and increase the size of the pie for patent owners and implementers. One problem in licensing negotiations is the competitive disadvantage perceived by early licenses, which claim, among others, that they need to factor in a bigger cost in the bill of material, the cost of the license, than their competitors, which have not taken a license yet.”

“After years of interaction with patent holders and implementers of several technologies, we realized that in certain areas like Wi-Fi, this problem could be mitigated. We came up with LIFT, which has been over two years in the making and it has been fine-tuned with the help of the founding members of this pool. All of them liked the concept behind it and very enthusiastically engaged in discussions with us.”

The Economist's View

Bowman Heiden, the Executive Director at The Tusher Center, University of California, Berkeley, and the Co-Director at the Gothenburg Center for Intellectual Property, presented the economist’s view. Heiden started by describing the “prisoner’s dilemma,” a classic game theory construct by which two suspects are questioned separately by the police. “The best outcome would be for both suspects to stay quiet. However, if one suspect talks, the consequences are worse for the suspect that stays quiet. Thus, while the suspects would be better off protecting one another, each of them is incentivized to act in their own self-interest, which produces a worse result than cooperating.”

The corollary in patent licensing is that the best long term result occurs when both parties cooperate and implementors pay a fair royalty to patent owners. However, early implementors may perceive themselves at a disadvantage because royalties add to their cost structure but not to the cost structure of competitors that refuse to take a license.

According to Heiden, “Sisvel developed the LIFT model...to remove the asymmetry between early adopters and reluctant licensees. LIFT incentivizes licensees by providing a partial immediate payment that's based on the license penetration. And then there's a deferred amount of remaining liability that they pay later on, as the penetration goes up–and they pay this at a discount so that the early adopters are not at a disadvantage against later adopters.”


 
Heiden’s diagram illustrates the theory. Early licensees “Pay less in the beginning. It ramps up as participation grows. They carry this liability as a deferred royalty, and that only is paid if the participation gets to a certain level”

Heiden concludes, “The overall goal of LIFT is to increase efficiency and reduce friction within the SEP market. So when you create a platform that incentivizes a large proportion of licensors and licensees to participate, it benefits all the parties involved. So one way to say this is a rising wave lifts all ships.”

The Patent Owner’s View

Ultimately, it’s the patent owners that set pool royalty terms, and the founding members of the Wi-Fi 6 pool had to approve the LIFT payment structure before it went into place. They did so because they share Sisvel’s vision, as expressed by Rombolá, for “licensing programs that accelerate technology adoption and increase the size of the pie for patent owners and implementers.”
For example, Jin Sam Kwak, Chief Executive Officer, and Founder at WILUS Inc, a founding member of the Wi-Fi pool, describes LIFT as “an alternative scheme for sponsoring the adoption of new technology for implementers. Adjusting the royalty payments based on the global market penetration of the Wi-Fi 6 technologies can incentivize the new standard adoptions. With LIFT, since the Wi-Fi 6 pool is made more flexible and attractive to potential licensees, they can join the pool as quickly as possible.”

This holistic view was echoed by Jako Eleveld, Head of IP Licensing, and VP at Philips, which is both a patent owner and pool licensee. During the webinar, Eleveld commented that “LIFT prevents the problem that we usually have in patent pools that nobody wants to jump in first because paying full royalties from the start may be a competitive disadvantage. By paying only a fraction from the start and more later, when other implementors sign up as well, we have alleviated that problem. So, that is good for implementers, and what is good for implementers is also good for the pool and hence for patent holders. We believe that this avoids holdout in the market, and more implementers will sign up earlier, which is beneficial.”

The Implementor’s View

Huawei has been a Wi-Fi implementor for almost 20 years. Huawei’s view of LIFT was expressed by Zhiyong (Alan) Fan, Vice President, Head of IPR Department at Huawei Technologies, who commented, “LIFT is a very creative way to do licensing. It encourages early adoption of new technologies, and it helps the new licensees to maintain their competitiveness against the companies who have yet to take the license.” Huawei is also a patent owner and licensee of Sisvel’s Wi-Fi 6 Pool.

As you’ve heard from all involved, by protecting the competitiveness of early pool licensees, LIFT encourages early technology adoption of Wi-Fi 6, helping the market expansion, pool participation and ultimately the consumers, that can buy their innovative new products. Royalties paid to patent owners fund future innovations that deliver technology enhancements for Wi-Fi 7 and beyond, perpetuating the innovation cycle.

This makes LIFT look good from any angle.



Photo by Shad0wfall from Pixabay

Many new features in cars start as expensive options for luxury editions and evolve into standard features for all models. This certainly has been true with Wi-Fi. According to Car and Driver magazine, “Wi-Fi access has become a major selling point for buyers, especially for those who feel cut off from the world without Internet access. In fact, having a Wi-Fi hot spot is typically an expectation when considering a new vehicle.”

From its start as a simple way for our passengers to surf the Internet and watch movies while we’re driving, Wi-Fi’s utility has increased significantly, in part due to new features available in Wi-Fi 6. This article will trace how Wi-Fi is being used in cars and its evolution from an expensive option to an essential feature.

Why Wi-Fi?

Most smartphones can serve as hotspots, and we all have smartphones, so why do cars need Wi-Fi? Several reasons.

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Honda - As any parent can tell you, keeping everyone connected is a big part of modern family happiness. With our new...4G LTE Wi-Fi, the new Odyssey is all about keeping everyone connected and comfortable.”

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First, Wi-Fi installed in your car doesn’t consume your phone’s battery nor your mobile data plan. Also, as we’ll discuss later, Wi-Fi installed in your car enables features that you can’t get with phone-based Wi-Fi. Moreover, it guarantees you autonomy and a secured and reliable connection all the time: there might be public hotspots, but you don’t need to depend on them anymore - plus, Wi-Fi connection in your own car is generally safer than a Starbucks Wi-Fi!

It Started with Entertainment

When Wi-Fi first appeared in cars, passenger entertainment was a huge driver and differentiator. For example, when Honda added Wi-Fi to its 2018 Odyssey minivan, it enabled streaming video to its ceiling-mounted rear entertainment system. Regarding its utility, a Honda executive commented, “As any parent can tell you, keeping everyone connected is a big part of modern family happiness. With our new...4G LTE Wi-Fi, the new Odyssey is all about keeping everyone connected and comfortable.”

This functionality and sentiment have been echoed by many other carmakers. Here’s a blurb from Jaguar's website. “Wi-Fi Hotspot is all about keeping you connected. It allows you and your passengers to connect to the internet via a powerful in-car 4G hotspot. This means that up to eight devices can be connected to keep in touch with work, life, and entertainment while on the move.” Cadillac's website prompts potential buyers to “take ownership to the next level. Cadillac Connected Services helps make ownership more enjoyable and simplifies your life while on the go.”

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Mercedes Benz - “One of the greatest technological innovations to be added to Mercedes-Benz vehicles in recent years is the ability to connect to a Wi-Fi hotspot in your vehicle.

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Mercedes Benz gushes, “One of the greatest technological innovations to be added to Mercedes-Benz vehicles in recent years is the ability to connect to a Wi-Fi hotspot in your vehicle. This has a couple of benefits. For one, you can avoid overage charges with your cellphone carrier, which can just be annoying. And two, it allows devices like tablets or laptops that may not have 4G capability to easily connect to the Internet with a connection that is secure and fast.”

BMW touts the productivity-related benefits of Wi-Fi, “WiFi in the car...could soon revolutionize our workplace. Collaborative tools enable location-independent cooperative work, easy communication, and secure exchange of documents. Provided one has a stable internet connection, work can be done at home, in the park, in the café or on the beach, as well as on the train or in the car...For new car buyers, WiFi is increasingly becoming a key factor when it comes to making a purchase decision, if not a basic requirement.”

Regarding FordPass Connect, Ford’s website explains, “Up to 10 devices can connect at once, and you can use FordPass to keep track of your Wi-Fi data usage. You can access the hotspot up to 50 feet outside the vehicle. Now you can stay connected, even as you roam the highways.”

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Ford - “Now you can stay connected, even as you roam the highways.”

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Going Beyond Entertainment and Connectivity

For perspective, understand that although Wi-Fi’s range has extended significantly over previous generations, it’s essentially a local technology. Within a car, Wi-Fi (and often Bluetooth) is used to allow dozens of sensors and other devices to communicate with each other and the car’s CPU. When data is interchanged with services outside the car, this can be done via Wi-Fi if the external service is local--like a car on a dealer’s lot--or via cellular if more remote. In this fashion, Wi-Fi and cellular work together to keep your car connected.

Figure 1. Internal connectivity use cases for the connected car (Image credit EDN).

This technology collaboration enables features like location sharing, driving history, and crash response. Tesla goes far beyond this with remote diagnostics and over-the-air (OTA) software updates that can eliminate repair trips to the dealership. As described on Tesla’s website, “If your car requires attention, Tesla mobile technicians can complete most repairs wherever you park. If they can’t fix your issue on the spot, they can often identify and pre-diagnose repairs for faster service when you arrive at a Tesla Service Center.”

Where is all this going? The website Electrek, which tracks the transition from gas-powered cars to electric, predicts that “in a not-so-distant self-driving future, I can see your Tesla sending you a message asking if you need your car for a certain window of time, and if you don’t, it will drive by itself to the service center to get an issue fixed.” As traditional carmakers computerize more and more functions within their vehicles and launch new electric vehicles, many are also offering OTA updates. You can learn which companies offer OTA updates and how they work In this article, also on electrek.

The Promise of Wi-Fi 6

Meanwhile continued R&D investments by Wi-Fi contributors deliver new features that will enable newer versions of Wi-Fi, like Wi-Fi 6, to more efficiently serve in automobile-related applications. As detailed in EDN, “Wi-Fi 6 is expected to become the de-facto wireless interface for fully-connected cars. The most significant improvement over its predecessor is increased spectral efficiency, delivering an up-to-fourfold increase in channel capacity. This will either allow it to serve more clients per access point or enable new high-bandwidth use cases, for example streaming ultra-high-resolution video. Wi-Fi 6’s flexibility makes it better adapted to serve clients using smaller chunks of data, without reserving unnecessary overhead.

These improvements are elaborated upon in NXP’s article, 6 Reasons Why Automotive OEMs Are Upgrading to Wi-Fi 6, which lists less congestion, longer range, lower power, faster speeds, upload performance, and consumer satisfaction as the six reasons.

Figure 2. As predicted by BMW, autonomous driving will only make integrated Wi-Fi even more important to the automobile (Image credit - BMW).

The benefits that Wi-Fi delivers will only increase as autonomous driving becomes a reality. As summarized by BMW, “Permanently integrated WiFi, in particular, illustrates a change that vehicles are currently undergoing. Whereas we are currently using cars purely for locomotion, in the future autonomous driving will open up new possibilities: From the mobile office and entertainment to simple connectivity – WiFi in the car is one of the first steps towards achieving these goals.”

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BMW - “From the mobile office and entertainment to simple connectivity – WiFi in the car is one of the first steps towards achieving these goals.”

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Clearly, automakers are all in when it comes to Wi-Fi. For you, as consumers, this means ever-increasing convenience and safety.

Funding Innovation

Wi-Fi innovations come from multiple companies that invest hundreds of millions annually in R&D. Some recoup their investment largely via product sales, while others are research organizations that fund R&D with royalties from the companies that manufacture and sell products that utilize their technologies. As a patent pool administrator, Sisvel helps form and manage patent pools that provide efficient access to the technologies created by their patent owners.

A patent pool allows, by signing a single contract, to deliver access to multiple patented technologies, reducing overall administrative and licensing costs and accelerating time to market. Royalties paid by these licensees enable additional R&D to ensure that Wi-Fi and other technologies continue to meet and anticipate the future needs of current and new users.

Think about this innovation cycle the next time your passengers surf the Internet or watch high-quality movies while you’re driving, or you get an email from your car telling you that your engine is overheating and needs checking. Without the advancements funded by royalties, none of this would be happening.
Head image credit IEEE SA

Overview

This document briefly describes WILUS, Wi-Fi 6, and WILUS’ contribution to the 802.11ax specification, or labeled Wi-Fi 6 by the Wi-Fi Alliance. Though a relatively small company, WILUS contributed to many critical features in Wi-Fi 6, and its patent portfolio represents a significant component of Wi-Fi 6-related IP.

About WILUS

WILUS is an R&D Company based in South Korea, which was founded in 2012 by Jin Sam Kwak (1) to focus on wireless and multimedia technologies for next generation ICT standards such as LTE-Advanced Pro, 5G NR(-Advanced), Wi-Fi 6, MPEG-H 3D Audio, and VVC. Within WILUS, more than 30 engineers and experts hold advanced degrees (Ph.D./M.S.) and have unparalleled expertise and experience in wireless connectivity and all relevant standards technologies. During the past ten years, WILUS’ standards team has been a key contributor to global ICT standards development for the next generation of wireless and multimedia services.
 
About Wi-Fi 6

The IEEE 802.11ax standard, otherwise known as Wi-Fi 6, or High-Efficiency WLAN (HEW) is the latest technology replacing the current 802.11ac WLAN devices, providing scalability and uncompromised performance. The high-level goal for Wi-Fi 6 was to improve spectrum efficiency and throughput in high-density Wi-Fi environments. As formulated, Wi-Fi 6 lets access points support more clients in dense environments and provides a better experience for typical wireless LAN networks. Wi-Fi 6 also provides up to 4x increase in throughput while reducing power consumption reduced by up to 66%. Figure 1 shows the evolution of Wi-Fi standards.


Figure 1. The Evolution of Wi-Fi Standards

WILUS Contributions to 802.11ax/Wi-Fi 6
Some background on the IEEE and its standard-setting process will be helpful to understand WILUS’ contribution to Wi-Fi 6. Briefly, the 802.11ax standard is an IEEE specification, Wi-Fi 6 the Wi-Fi Alliance designation. The IEEE (I-triple-E) is the Institute of Electrical and Electronics Engineers, a professional and standard-setting organization. The IEEE 802.11 working group under the IEEE Project 802 LAN/MAN Standards Committee (aka IEEE 802 or LMSC) sets all Wi-Fi standards.

The standardization process starts with a functional requirements document that, as the name suggests, defines the technical requirements for the new specification. Once defined, individual members in dozens or hundreds of companies submit technical contributions to meet these requirements. This is a competitive process as different companies propose different technologies and technological approaches.

Movement through the process is driven by individual voters in the IEEE 802.11 working group. Specifically, at various points in the standard-setting process, at least 75% of voters must agree to add a technical contribution to the specification framework, adopt the specification into a draft, and approve the draft. Though WILUS is small compared to many contributors in global big companies, WILUS had several voting members in the IEEE 802.11 working group and actively participated in IEEE 802.11ax standards development with their technical expertise. During the Wi-Fi 6 development process, WILUS submitted more than 90 contributions with almost 30 adopted contributions from May 2014 to the publication of the specification in May 2021. This placed WILUS well within the top 20 contributors to Wi-Fi 6 – if we were to limit the analysis to the contributions submitted before November 2016, when Draft 1.0 was released (2), WILUS would rank even higher.

As it is standard practice, WILUS secured the ideas aimed to 802.11ax by patenting them and then strategically submitted selected ideas as the technical contributions, based on the standards progress for the development of IEEE 802.11ax specification. All patents including the technical proposals to the 802.11ax totaled more than 500 patents by the end of 2021, and the total is expected to grow to more than 750 granted patents by the end of 2025.

In terms of coverage within the main features of Wi-Fi 6, the WILUS patent portfolio addresses, together with others, about 90% of the more than 40 (new) core features of Wi-Fi 6 and contributes to the primary benefits of Wi-Fi 6 (faster throughput, higher capacity) as well as other benefits (extended wireless range, longer battery life, and coexistence with legacy Wi-Fi devices). The main features and relevant benefits which WILUS contributed to are as follows:

• PPDU format & Preamble - defining new wi-fi frame structure for co-existence with legacy device and extended wireless range
• Downlink OFDMA - an access point transmits multiple data to multiple stations simultaneously, leading to faster aggregated network throughput
• Uplink OFDMA (Trigger frame based) - allows multiple stations simultaneously transmit data frames, greatly increases network capacity by removing contention overhead
• Spatial Reuse & BSS Color - more aggressive in accessing the medium with coloring mechanism for better network capacity in congested area 
• Target Wake Time & Power Save - scheduling of traffic exchanges between an access point and a station to reduce power consumption

Summary

The formulation of a standard is a competitive, consensus-driven process that ensures that only the most innovative and best-performing technologies become part of the standard. WILUS was a substantial contributor to Wi-Fi 6 specification as measured by the number of accepted contributions and their importance to critical Wi-Fi 6 features. WILUS’s patent portfolio represents a critical component of the patents related to Wi-Fi 6.


(1) He received his B.S., M.S., and Ph.D. degrees in Electrical Engineering and Computer Science from Seoul National University, Seoul, Korea, in 1998, 2000, and 2004, respectively. After postdoctoral research positions at Georgia Tech. and UT Austin, from 2007 to 2012, he served as a chief research engineer at LG Electronics. During this time, he carried out research tasks focused on the IMT-Advanced and led the standards activities for wireless communications such as 3GPP, IEEE 802, Wi-Fi Alliance, and WiMAX Forum, as well as served as an alternative board member in Wi-Fi Alliance.
(2) Draft 1.0 is the most statistically significant, because it defines most of the basic features that constitute the core of the 802.11ax specification: this is when new chips started to be designed.

SoFi Stadium is the glittery new jewel of NFL stadiums, home of the Los Angeles Rams and Los Angeles Chargers, and the site of Super Bowl 56. With connectivity so crucial to the fan experience, it’s no surprise that SoFi chose Wi-Fi 6 for its wireless technology.

Over the last few years, many stadiums have added Wi-Fi 6 connectivity to their facilities, not only so fans can watch instant replays and post on social media but to support touchless concession ordering and payment and digital ticketing. According to Jason Gannon, managing director of SoFi Stadium: We envision SoFi Stadium not just hosting world-class events like the Super Bowl and the Olympics, but also ... [setting] a new standard for the fan experience through cutting-edge technology that will enhance the way guests interact with live eventsTo support this vision, technology integrator AmpThink installed about 2500 Wi-Fi 6 access points throughout the stadium and surrounding facilities.

Usage statistics show this money was well spent. SoFi reports that during an average football game, fans consume 18TB with a peak utilization of 24TB. The average concurrent take rate was 69% with an astounding peak rate of 84%, and the average data consumed by fans at all events was 533MB. According to tests performed by CNET, Wi-Fi 6 transfer speeds within the stadium reach 1,320 Mbps, which was 40% faster than the fastest Wi-Fi 5 speed they had ever measured.

Wi-Fi 6 Cuts Through the Clutter

But Wi-Fi 6 isn’t just about speed. This new generation of wireless incorporates many sophisticated technological advances like OFDMA (orthogonal frequency-division multiple access) and downlink and uplink MIMO (multiple-input and multiple-output) to serve multiple users much more efficiently. It adds back the 2.4 GHz spectrum band to add capacity and increase the effective reach, and technologies like BSS Coloring to work more efficiently in crowded Wi-Fi environments. These features, plus a maximum transfer speed of 9.6 Gbps, make Wi-Fi 6 ideal for stadium usage.

So, it comes as no surprise that Wi-Fi 6 has been the wireless technology of choice for a number of connectivity upgrades, including Old Trafford stadium in Greater Manchester, Olympiastadion in Berlin,  St. Jakob Park in Basel Switzerland, Coors Field in Denver, Chase Center in San Francisco, Nissan Stadium and 16 Major League Baseball stadiums in the US. It’s not a stretch to say that Wi-Fi 6 is improving the fan experience around the world.

Funding Wi-Fi Innovation

As entertainment venues and other markets continue to push the envelope for improved performance and reliability in increasingly challenging environments, the Wi-Fi development community continues to invest in R&D to meet and exceed these requirements. As a patent pool administrator, Sisvel helps companies that fund this R&D recoup their investment so they can perform more research to deliver even more benefits in future versions.




Image is from here: Transportation Options - SoFi Stadium | Hollywood Park (hollywoodparkca.com)

Hello, I’m Andrea Rombolà, I’m managing the Sisvel’s program on Wi-Fi technology. As you’ll see over the next few months, we’re using this blog to educate readers on Wi-Fi technology, highlight the business opportunities in new and existing markets that it enables, and to present our point of view regarding patent licensing.

Even ten to fifteen years ago, most hospital Wi-Fi networks connected computers and notebooks, and perhaps the odd PDA or medical device. Today, the number of connected medical devices has soared into the millions, with many requiring in-hospital Wi-Fi connections. At the same time, largely COVID-inspired telemedicine is expected to achieve seven-fold growth by 2025, placing additional demands on Wi-Fi networks.

Few doubt the benefits that connected medical devices and telemedicine bring to patient care and operational efficiency. But the combination of more Wi-Fi devices, more access points, and increased bandwidth requirements creates new and increased demands on medical facility Wi-Fi infrastructures.

Fortunately, due to the forward-thinking development strategy adopted by companies contributing to Wi-Fi standards and technologies, Wi-Fi 6 and 6E were designed to handle many of the technical challenges imposed by IoMT and telemedicine. This article will identify these challenges and the new features and capabilities in Wi-Fi 6 and 6E that will enable medical facilities to meet them.

About Wi-Fi 6 and 6E

The standard for wireless local-area networks (WLANs), officially marketed by the Wi-Fi Alliance as Wi-Fi 6, operates over the 2.4 and 5 GHz spectrum bands. Wi-Fi 6E is also based on 802.11ax standard and is an extension of Wi-Fi 6 indicating support for operation also in the 6 GHz wireless spectrum.

As with all Wi-Fi generations, Wi-Fi 6 delivers much faster transfer speeds, with a maximum data rate almost three times faster than Wi-Fi 5 (9.6 Gbps compared to 3.5). However, another major focus of Wi-Fi 6 was to improve efficiency when multiple devices are vying for network access and to minimize contention when multiple routers are installed in the same building or office. One target was to increase “average throughput per user more than four times in high-density environments” another to reduce latency by as much as 75%. This is why Wi-Fi 6 is also called “High-Efficiency Wi-Fi.”

The features implemented to achieve these results make Wi-Fi 6 and 6E uniquely qualified for deployment in healthcare environments. Let’s explore common healthcare-related Wi-Fi challenges and features that enable Wi-Fi 6 to overcome them.

Figure 1: Multiple medical connected devices, many of which use Wi-Fi.

Scenario 1: Multiple Devices Seeking Wi-Fi Access

The average hospital room has between 15-20 connected devices, many using Wi-Fi, with some using other communications technologies like Bluetooth. Some may be pulling relatively light duty, like a heart rate monitor pushing a few bytes of data a minute while a laptop retrieving an x-ray or other scan needs to download megabytes of data as quickly as possible. All devices are mission critical.

Previous generations of Wi-Fi communicated to each device sequentially using fixed bandwidth packets. This wasted bandwidth when the available data was less than the capacity of the packets, and increased latency when serving multiple clients, who all had to wait their turn to transmit or receive packets. You see this on the top in Figure 2.

One key new feature in Wi-Fi 6 is Orthogonal Frequency-Division Multiple Access (OFDMA), which allows up to 37 clients to share a 80 MHz channel simultaneously, using varying packet sizes, so the heart rate monitor can send just a few bytes of data while the downloading x-ray consumes much more bandwidth. Shown at the bottom of Figure 1, this allows the network to serve more devices more efficiently and reduce network-related latency.

Figure 2. How OFDMA improves throughput, spectrum efficiency, and multi-device traffic capacity (from here).

Wi-Fi 6 also expanded the capacity of Multi-Input Multiple-output (MIMO) technology, which lets a Wi-Fi access point with multiple antennas communicate simultaneously with multiple devices. With Wi-Fi 5, an access point with four antennas could transmit to four devices simultaneously, but the access point could only accept a single upload at a time. Wi-Fi 6 supports up to eight antennas for both download and upload, further reducing latency and improving multiple device support.

Figure 3. Telemedicine is a very high bandwidth bi-directional medium that imposes significant demands on Wi-Fi systems.

Telemedicine

Video-conferencing is a highly-demanding application for both upload and download. Obviously, Wi-Fi 6’s increased speed benefits in both directions, but other advanced Wi-Fi technologies also contribute to improved performance.

Increased MIMO is one of them; in addition to allowing an access point with multiple antennas to communicate with multiple devices simultaneously (Downlink, DL, MU-MIMO) as already defined in 802.11ac, 802.11ax also allows devices to communicate with the access point using multiple antennas (Uplink , UL, MU-MIMO). So, a computer with a network card with two antennas could double the Wi-Fi bandwidth by communicating over two antennas.

Wi-Fi 6 also uses a technology called Beamforming to direct signals towards specific clients, improving both throughput and range. Beamforming was part of Wi-Fi 5 but only addressed four users , which Wi-Fi 6 increased to eight. Another efficiency technique is 1024-QAM, which increases the information carried by the Wi-Fi signal from 8-bits to 10-bits, increasing throughput by 25%.

Finally, Wi-Fi 6E compatible devices can also access the 6 GHz wireless spectrum, which adds 14 80 MHz channels and seven 160 MHz channels to the 2.4/5 GHz channels addressed by Wi-Fi 6. Since the 6GHz spectrum isn’t used by previous Wi-Fi generations, there will be less contention for these resources. The availability of this new, higher bandwidth spectrum means faster connections with less interference from legacy devices and better service for video-conferencing and similar bi-directional mediums.

Figure 4. Multiple networks in the same location can increase latency significantly without BSS Coloring.

Multiple Networks and Access Points

Many medical facilities have multiple networks with different access points serving different departments and different classes of users, like guests and internal staff. Though each access point will only serve clients that are properly logged in, they all share the same spectrum, which can introduce latency when devices are vying for connections within their individual networks.

A new Wi-Fi 6 feature called BSS Coloring allows access points to quickly identify devices in their network and ignore devices in other networks. In a crowded Wi-Fi environment, BSS Coloring can dramatically increase throughput and decrease latency, improving overall Wi-Fi efficiency for all users.

Figure 5. Target Wake Time preserves the battery life of battery-powered monitoring devices. Image from here.

Preserving Battery Life of Medical Devices

In-hospital and remote patient monitoring is often performed with battery-powered devices, some of which require a persistent connection to continually send data and some of which can collect data and send updates periodically. In the latter case, a new Wi-Fi 6 feature called Target Wake Time allows devices to schedule times for these periodic uploads. Since Wi-Fi data transmission doesn’t need to be enabled except during these transfers, this extends battery life and reduces Wi-Fi congestion.

Funding Wi-Fi Innovation

As healthcare and other markets continue to push the envelope for improved performance and reliability in increasingly challenging environments, the Wi-Fi development community continues to invest in R&D to meet and exceed these requirements. As a patent pool administrator, Sisvel helps companies that fund this R&D recoup their investment so they can perform more research to deliver even more benefits in future versions.

• The reaction to the pool’s launch has been enthusiastic. After the first phase, when public announcements were made to present the pool itself and LIFT, we contacted dozens of Wi-Fi 6 implementers (more than 200 as of today, but many more are to come as the technology gets increasingly adopted), offering a license.
• An astonishingly high percentage of them engaged with us, welcoming the valid alternative this pool was offering. It may seem too optimistic, but facts confirm our perception: the pool can already count several licensees, including the founding members, that decided to adopt LIFT in their license agreement. They clearly wanted to be the first!

• First of all, the reputation of the patent owners and their contribution to the development of the technology is a tremendous asset. Other factors are the quality of the pool’s patents – which the ongoing technical discussions are unveiling as we proceed with them – the competitiveness of the license offer, the LIFT payment scheme, and the potential to resolve the patent owners’ ongoing litigations through a pool license. All of this makes this pool very attractive to both patent owners and implementers: an effect that we perceive daily in our licensing discussions.

• A lot has been written about it: in short, it is a new royalty payment scheme, where payments are made according to the license penetration. It eliminates the competitive disadvantage that might be caused by being one of the first companies to license a new technology, incentivising early adoption.
• Under LIFT, royalty payments are adjusted based on the percentage of the market that is licensed. LIFT is not a discount scheme though: if only a small portion of the market is licensed, most of the liability is deferred (not waived) until competitors actually pay. What isn’t paid immediately is added to a basket of unpaid liability which is also paid in accordance with the market penetration and is discounted and depreciated over time. You can read more about it here and here. 

• We explain LIFT several times a week; people want to know how it works and the concrete benefits it delivers. It would be a lie to say that explaining LIFT is effortless: to provide a balance between the needs of implementers and innovators, the mechanisms of LIFT needs many elements that drive some complexity, but its benefits are real, and the perception of tangible advantages by implementers is helping us overcome the challenges.
• We continuously provide explanations, some of them high-level and some more detailed, Excel models, flow charts, …. We are doing everything we can to help people understand it and interiorize it. And, little by little, we are winning potential licensees over!

• We are, yes. Several patent owners contacted us starting from the day after the launch. There are few leads that we are confident we will be able to conclude in the next few months, which is great. More patent owners increase the reputation of the pool, and benefit all technology implementers: taking this pool license means getting a set of rights which is ever expanding, and those who already signed up for this license are enjoying this benefit.

• The latest big step has been the publication of the first version of the patent list on our website, which just happened. As we explained at the launch, it took time for the evaluation process to achieve an acceptable level of completion. The list now includes over 200 patent families and 1400 patents.
• Naturally, this list will keep increasing due to new evaluations identifying new list members, and we will periodically update it to reflect this. The publication of the patent list was the last missing brick to make this pool’s license offer truly and fully transparent: our licensing operations can now continue moving additional steps forward. We expect to see many licensing deals concluded in the coming months.

Photo from g. p. by Pixabay 

If you’ve been wondering if now is a good time to upgrade to Wi-Fi 6, you’re definitely late to the party. The Wi-Fi Alliance recently reported that Wi-Fi 6 surpassed 50% market share in three years, compared to the four years it took for Wi-Fi 5. The Alliance cited several reasons for this fast adoption, including Wi-Fi usage in the Internet of Things (IoT) and improved performance in Wi-Fi dense public areas. However, Wi-Fi 6E appears to be the main draw, with the Alliance reporting that “Wi-Fi 6E has seen...strong adoption in products and in service provider and enterprise deployments.”

About Wi-Fi 6E

As explained here, Wi-Fi 6E is an extension of the Wi-Fi 6 specification that incorporates products that support the 6 GHz wireless spectrum. That is, all Wi-Fi 6 devices (and many previous generations) use the 2.4 GHz and 5 GHz spectrum, so there’s more contention for this bandwidth. Wi-Fi 6E adds the 6 GHz spectrum, with more channels and less competition for the spectrum.

Note that the availability of the 6 GHz bandwidth is decided on a country-by-country basis. While the US, Canada, and European Union have opened up the 6GHz band for 6E usage, support from other countries, particularly in Asia and Africa, is nascent.

Where 6E is available, it’s made a significant difference in general purpose usages, as well as in healthcare and academia. For example, Turkish phone company Turk Telekom recently tested Wi-Fi 6 in closed lab testing and over the internet, and found that “by operating in the 6 GHz spectrum, interference and latency are dramatically reduced, enhancing the user experience with increased speed and performance worthy of the next generation applications currently being discussed.”

In addition to immediate performance enhancements, company officials see that Wi-Fi 6 “lay[s] the groundwork for Wi-Fi 7 so that citizens can utilize the digitally immersive services that will drive advancements in education, manufacturing, entertainment and more.”

Wi-Fi 6E: Enhanced Security

Beyond the new spectrum, Wi-Fi 6E is also very secure. That’s because Wi-Fi 6E devices, like all Wi-Fi 6 devices, require WPA3 security certification, replacing the legacy WPA2 standard and making Wi-Fi security options more robust than ever. This can be critical in a hospital or similar environment where the need for security is paramount.

For example, when Novant Health rolled out a new Wi-Fi 6E network in October, 2021, they identified WPA3 and Enhanced Open, another wireless security standard from the Wi-Fi Alliance, as key technology drivers. Of course, they loved the speed and pristine spectrum as well, as evidenced by this statement from Allen Rider, Chief Wireless Network Architect. “Wi-Fi 6E brings 1200 Mhz of interference-free spectrum that will enable advanced healthcare deployment scenarios. Our mission-critical, Wi-Fi-enabled care equipment will now have its own clean airspace to ensure the delivery of revolutionary new services.”

Wi-Fi 6E has also proved compelling on ultra-large campuses like the University of Michigan, which recently spent US $11 million dollars to upgrade to 6E, adding over 15,000 network access points, and enabling the University to support a number of key academic needs. For example, in large auditoriums, students can collaborate via Zoom creating subgroups while maintaining social distances. The 6E network also provides the enhanced connectivity to support robots in the Ford Robotics Building, built in collaboration with the Ford Motor Company.

Wi-Fi 6 and 6E are the fruits of the Wi-Fi development community’s continual investment in R&D to produce technological enhancements that solve real problems for Wi-Fi users and enable and enhance new applications. As a patent pool administrator, Sisvel helps companies that fund this R&D recoup their investment so they can perform more research to deliver even more benefits in future versions.



Photo of Sasin Tipchai from Pixabay

Most consumers see successive versions of Wi-Fi from a very me-centric lens - how much further can I sit from the router and still be productive? Or, can I watch 4K videos on my notebook while sitting in the backyard? And, of course, the most recent versions of Wi-Fi let you sit further and download faster than ever before.

In fact, the main goal that the task group which developed the 802.11ax standard (TGax) set for itself was delivering better performances (higher data rates) in highly dense environments (e.g. offices but also campuses, airports and stadium), by improving the efficiency of the whole network and saving battery life of each device.

But there is a lot more. Wi-Fi 6 will greatly influence our everyday lives, both directly and indirectly. One of the areas where Wi-Fi 6 will have a huge impact is the Internet of Things, or IoT. As defined in Wikipedia, IoT “describes physical objects that are embedded with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks.” A sensor in your refrigerator could alert you if your refrigerant starts leaking, or a medical device could continually send data back to a physician for monitoring.

Bringing connectivity to increasingly smarter devices will deliver significant benefits in markets as diverse as factory automation and national defense. And, as explored in an article entitled Wi-Fi 6 is set to change the future of IoT—Here’s why, new features in Wi-Fi 6 significantly enhance Wi-Fi’s role in IoT, not only with faster throughput but, as we said already, also with power-saving features that extend battery life and better performance in areas congested with multiple Wi-Fi and other signals. 

Wi-Fi is also playing an increasingly important role in automobiles, not only for sending operating data back to the factory but also for high-bandwidth media consumption that often is shared among multiple riders. As detailed in an article entitled How WiFi 6 will enable smarter vehicles, Wi-Fi 6 delivers multiple features that enhance automotive Wi-Fi performance, including the ability to partition bandwidth more effectively so multiple riders can enjoy their movies while under-the-hood monitoring devices can continue to communicate effectively. 

The key point is that where earlier generations of Wi-Fi primarily enabled router-to-computer, phone, tablet, or smart TV communications, newer generations allow a much more diverse set of manufacturers to add features that significantly enhance the utility and marketability of their products. That’s why you’ll see Wi-Fi added to an increasing range of products from air conditioners to toilet seats. 

Bringing it back to the me-centric view that we all share, not only does Wi-Fi 6 let you sit further from your router and enjoy 4K videos, it can also alert you that your air-conditioner is ailing before it fails and significantly enhance connectivity in cars, airplanes, conferences, and other congested use scenarios. So, maybe Wi-Fi 6 is all about you, after all. 

Wi-Fi 6 offers many new features that enable or enhance many products in many industries beyond those mentioned above. Check back for additional posts that will describe these features and their underlying technologies.

Photo by Erik Odiin on Unsplash

For many Wi-Fi users, the data in the table below tells them everything they need to know about Wi-Fi 6; It retains the same bandwidth as Wi-Fi 5, adds back the 5GHz frequency band (and further adds the 6 GHz frequency band – the so-called Wi-Fi 6E) , and other innovations boost the maximum data rate to 9.6 GHz. It’s also backward-compatible to previous versions, so your Wi-Fi 6 router will connect to previous generations just fine, though obviously limited to the highest speed afforded by that generation. 

Feature	Wi-Fi 4	Wi-Fi 5	Wi-Fi 6
Channel bandwidth (MHz)	20, 40	20, 40, 80, 80 + 80, 160	20, 40, 80, 80 + 80, 160
Frequency bands	2.4 and 5 GHz	5 GHz	2.4 and 5 GHz
Maximum data rate	150 Mbps	3.5 Gbps	9.6 Gbps
Underlying technology	IEEE 802.11n	IEEE 802.11ac	IEEE 802.11ax

Table 1. Derived from Wi-Fi Alliance document entitled Wi-Fi CERTIFIED 6™: A new era for Wi-Fi® 

Now that we know the high-level numbers, let’s explore some of the innovations that deliver this improved performance, plus the other numerous other technological benefits of Wi-Fi 6. For perspective, it’s always useful to assess a technology by considering the environment it works in and the tasks it’s expected to perform. 

As you can see in Figure 1, Wi-Fi originally transmitted lightweight emails and other primarily business-oriented documents to and from computers and notebooks. Over the years, usage has expanded to include a range of mobile, industrial, and entertainment devices and content like video that requires increasingly higher throughput. To meet these new and challenging requirements, Wi-Fi 6 not only needed to be faster, but it also needed to work more efficiently in environments congested with many Wi-Fi routers and clients, to protect the battery life of Wi-Fi clients, and deliver other features. 

Figure 1. The expanding role and increasing demands on Wi-Fi technology (from TechSpot). 

Orthogonal Frequency-Division Multiple Access (OFDMA)

One key new feature in Wi-Fi 6 is Orthogonal Frequency-Division Multiple Access (OFDMA). As shown in Figure 2, previous Wi-Fi generations communicated serially using fixed bandwidth packets. This wasted bandwidth when the available data was less than the capacity of the packets, and increased latency when serving multiple clients, who all had to wait their turn to transmit or receive packets. 

Figure 2. How OFDMA improves throughput, spectrum efficiency, and multi-device traffic capacity (from here). 

As shown at the bottom of Figure 2, OFDMA subdivides the Wi-Fi channel into smaller allocations called “resource units” which can send and retrieve data to multiple clients in parallel, essentially maintaining simultaneous connections with multiple clients. OFDMA also supports data packets of different sizes, so a video-conferencing client can transmit more data faster than a thermometer or medical device. As you can see in the diagram, OFDMA doesn’t increase the bandwidth of the channel, it uses the existing channel more efficiently, which increases overall throughput. 

In addition, OFDMA can also reduce latency with profound results in some applications. For example, one study found that OFDMA reduced upload latency by 99% and download latency by 93% in a classroom environment involving 19 students and one teacher videoconferencing at 3 Mbps each. In this increasingly relevant application, OFDMA made the difference between a  disjointed phone call-from-the-moon experience and a highly interactive learning session. 

 

Multi-User Multiple-Input Multiple-Output (MU-MIMO)

Another Wi-Fi 6 innovation is a further improving in the use of Multi-Input Multiple-output (MIMO) technology, which lets a Wi-Fi access point divide the network resources by the number of antennas on the access point (or AP). Using MIMO, a wireless router with four antennas can send four signals to a device with four antennas, which increases throughput significantly over an access point and device with two antennas. 

As shown on the left in Figure 3, the problem with traditional MIMO is that it can only transmit to a single user at a time, which is why MIMO is sometimes referred to as Single-User MIMO, or SU-MIMO. If that device only has a single antenna, like most mobile phones and tablets, MIMO provides little benefit, as the bandwidth enabled by the extra antennas goes to waste. 


Figure 3. MIMO can only transmit to a single user at a time while MU-MIMO can transmit to multiple users. From here. 

As the name suggests, multi-user MIMO, or MU-MIMO, allows a single AP to communicate to multiple devices simultaneously, dividing the available bandwidth into individual streams targeting each device. Like OFDMA, MU-MIMO doesn’t create additional bandwidth, it allows existing bandwidth to be used more effectively. 

Note that download MU-MIMO (DL-MU-MIMO) was introduced in Wi-Fi 5, but only addressed up to four terminal devices at the same time and that upload MU-MIMO (UL-MU-MIMO) was not available. Wi-Fi 6 supports up to eight users with up to 4 space-time streams per user (with the total across all users not exceeding 8 space-time streams). and is available for both download and upload, which can dramatically improve performance in high-bandwidth bidirectional applications like videoconferencing.

Figure 4. Beamforming focuses the Wi-Fi signal towards a specific device, improving speed and range. From here. 

Interestingly, Wi-Fi 6 uses a technology called Beamforming to direct signals towards specific clients which improves throughput and range (Figure 4). Like DL-MU-MIMO, Beamforming was part of Wi-Fi 5, however Wi-Fi 6 further increases the number of MU-MIMO users which can benefit from this technology. 

1024-QAM

Next up is 1024-QAM. By way of background, quadrature amplitude modulation (QAM) is a technique used to transmit information. Wi-Fi 5 uses 256-QAM which carries 8 bits, while Wi-Fi 6 uses 1024-QAM, which uses 10-bits, a bandwidth increase of 25%. One easy-to-understand analogy is a highway that remains the same width but squeezes five lanes into the space previously occupied by four. As shown in Figure 5, if the speed limit remains the same, throughput should increase by 25%. 

Figure 5. Wi-Fi 6 uses 1024 - QAM which carries 25% more data. 

BSS Coloring

Another Wi-Fi 6 innovation is BSS coloring, which reduces congestion when multiple access points are available in the same environment. By way of background, each router and set of connected devices is called a Basic Service Set, or BSS. Within a BSS, multiple devices will contend for a channel to the router at any given time. However, when multiple access points operate in the same environment, they will often share the same Wi-Fi channels. 

 To detect when a channel is available, a device within a particular BSS will listen to that channel to detect if any other device is transmitting. In a crowded signal environment, devices from other BSSs could be transmitting on the same channel, falsely indicating that the channel is busy. You see this on the left in Figure 6, where a device attempting to communicate on channel 4 sees activity from two other devices, which may or may not be in the same BSS. 

Figure 6. BSS Coloring reduces contention and improves bandwidth utilization. From here.  

BSS Coloring adds a 6-bit identifier to the signals (not actual colors), so devices can quickly identify devices in their BSS, and ignore devices in other BSSs. On the right in Figure 6, a device in the blue BSS seeking to transmit on channel 4 would ignore signals from the green and orange BSSs, and only detect that the channel was busy if another blue device was transmitting. 

BSS coloring promotes operational efficiency within each BSS and more efficient use of the available Wi-Fi channels. In a stadium, trade-show floor, airport, or other crowded facilities with multiple routers or other access points, BSS Coloring can dramatically increase throughput and decrease latency, improving overall Wi-Fi efficiency for all users. 

Target Wake Time

Finally, Target Wake Time is a feature that allows an access point and device to set a time for the device to wake up and communicate. In the case of battery-powered devices, this can obviously preserve battery life, but it also can reduce network contention by scheduling large data dumps during periods where the network is otherwise underutilized. 

Figure 7. Target Wake Time allows devices and access points to agree on a transmission time, saving battery life and increasing network efficiency. From here. 

Funding Innovation

Companies contributing to the Wi-Fi specification have continued to invest hundreds of millions of dollars annually to produce these innovations. This investment has produced a Wi-Fi standard that’s faster, more robust, and includes features that expand Wi-Fi usage into new applications like factory automation, Internet of Things (IoT), healthcare, and many others. However, like any investment, these expenditures only make sense if some revenue is returned. 

Some companies recoup their investment largely via product sales, while others are primarily research organizations that fund their R&D with royalties from the companies that manufacture and sell products that utilize their technologies. As a patent pool administrator, Sisvel helps form and manage patent pools that provide efficient access to the technologies created by their patent owners. 

By working with a patent pool, product developers sign a single contract that delivers access to multiple patented technologies, reducing overall administrative and licensing costs and accelerating time to market. Royalties paid by these licensees enable additional R&D to ensure that Wi-Fi and other technologies continue to meet and anticipate the future needs of current and new users. 

Think about this innovation cycle the next time you use Wi-Fi to watch a 4K HDR movie in your backyard or car, or video conference with colleagues around the globe with pristine quality and minimal latency. Without the advancements funded by royalties, Wi-Fi would be stuck in its 1999 performance envelope, and suitable only for checking email and transferring lightweight office documents. 

Photo by Gilles Lambert on Unsplash

Wi-Fi 6E is an extension of the Wi-Fi 6 specification that incorporates products that support the 6 GHz wireless spectrum. To explain, all Wi-Fi 6 products support both the 2.4 GHz and 5 GHz spectrums (see  Fig. 2 below). But only Wi-Fi 6E devices also support the 6 GHz spectrum.

The availability of the 6 GHz bandwidth is decided on a country-by-country basis. While the US, Canada, and European Union have opened up the 6GHz band for 6E usage, support from other countries, particularly in Asia and Africa, is nascent. Figure 1 shows existing support as of December 2021 from this Wi-Fi Alliance link. 

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Figure 1. Countries Enabling Wi-Fi 6E | Wi-Fi Alliance (link)

As Figure 2 shows, the 2.4 GHz and 5 GHz bands contain many fewer channels and fewer high-speed channels than the 6 GHz spectrum. Because all Wi-Fi 6 devices (and many previous generations) use these channels, there’s more contention for this bandwidth, not only within your home or office but also from nearby networks that communicate over the same spectrum.


In the US, Canada, and some Latin American countries, the 6 GHz frequency band provides 1200 MHz of spectrum which comprises an additional fourteen 80 MHz channels or an additional seven 160 MHz channels, as shown in Fig. 2. This means faster connections and less interference from other devices.

The 6 GHz frequency band will improve Wi-Fi performance by enabling:

• Higher concurrency – The 6 GHz frequency band provides an additional 1200 MHz of spectrum resources, which is more than the total resources provided by the 2.4 GHz and 5 GHz frequency bands. This alleviates channel congestion and enables more simultaneous users, improving the concurrency rate.
• High bandwidth – Although 160 MHz channels can run on the 2.4 GHz and 5 GHz frequency bands, there is generally too much traffic on these bands to provision a 160 MHz channel. The seven additional 160 MHz channels in the 6 GHz frequency should enable more of these high-speed connections, improving bandwidth.
• Low latency - Conventional Wi-Fi devices support only the 2.4 GHz and 5 GHz frequency bands. The 6 GHz frequency band is supported only by Wi-Fi 6E devices, which should mean lower traffic and lower latency. 

As a caveat, note that 6 GHz uses shorter wavelengths, which work well for data transfers but may face degradation of the transmitted signal over longer distances or outdoors and may not perform as well through obstructions like walls and floors in a building. So, if you’re video conferencing with a direct line of sight of the 6E router; performance should be fabulous. If you’re behind a brick wall, you may get better performance from the 5 GHz or even 2.4 GHz spectrums.

Since 6E is relatively new, products that support the 6GHz spectrum are more expensive today. However, if you want to future-proof your Wi-Fi investments, they are probably worth it. Overall, Wi-Fi 6E is another example of how continued investments in Wi-Fi-related R&D deliver additional functionality and performance to Wi-Fi users.


Photo by Sigmund on Unsplash

On January 5, 2022, the Wi-Fi Alliance announced Wi-Fi CERTIFIED 6 Release 2. Here’s what you need to know about this announcement.

What are the new features in Wi-Fi CERTIFIED 6 Release 2?
The new features include uplink multi-user MIMO and three power management features.

What is uplink multi-user MIMO?
MIMO stands for multiple input, multiple output. While  the previous Wi-Fi CERTIFIED 6™ certification program supported downlink multi-user MIMO, which enables an access point to deliver data to multiple client devices simultaneously,  Release 2 adds support for uplink multi-user MIMO that allows multiple devices to simultaneously upload data to an access point.

Imagine you have multiple individuals connected to Wi-Fi participating in a Zoom conference, an increasingly common scenario. Without uplink MIMO, each device uploads data individually, in rotation, which can introduce latency and interruptions. With uplink MIMO, all devices can upload simultaneously, which decreases latency and interruptions.

Uplink MIMO (and all new certified features) work over all bands supported by Wi-Fi 6 – 2.4 GHz, 5 GHz and 6 GHz, enhancing the performance gains delivered by Wi-Fi 6 and 6E.

What are the power-management features?
There are three primary enhancements, broadcast target wake time (TWT), extended sleep time, and dynamic multi-user spatial multiplexing power save (SMPS), which are primarily targeted towards Internet of Things (IoT) applications.

Broadcast target wake time (TWT) - Target wake time is a feature introduced by 802.11ah and included as well in Wi-Fi 6 in an improved version. This feature allows a device to “sleep” for extended periods, preserving battery life, and then wake and communicate with the access point. Broadcast target wake time allows a network to coordinate target wait times with multiple devices in the same wakeup window.

Extended sleep time - Clients may stay asleep even longer if they wish. Before 11ax, TWT clients would sleep for some milliseconds and then wake up, exchange data and go back to sleep for some milliseconds and repeat. With enhanced TWT, clients may sleep for seconds, minutes, or even hours. Some IoT devices only need to communicate back to the network once per day. In theory, they could sleep for 23 hours and 59 minutes and just wake up and do a transmission, then go back to sleep for another day. These efforts greatly improve battery life.

Dynamic multi-user spatial multiplexing power save (SMPS) - allows devices to dynamically power down and power up antennas to save power.

Will Wi-Fi CERTIFIED 6 Release 2 devices work with my existing Wi-Fi devices?
Yes, all Wi-Fi CERTIFIED 6 Release 2 devices are backward compatible, so they can communicate with existing Wi-Fi technologies. To access the new features identified above, however, both the access point and client device must be Wi-Fi CERTIFED 6 Release 2 compatible.

How can I tell if a device conforms to Wi-Fi CERTIFIED 6 Release 2?
You can check on the Wi-Fi Alliance website here.

What is the Wi-Fi Alliance?
The Wi-Fi Alliance is a worldwide network of companies that promotes the evolution and adaption of Wi-Fi through a variety of activities, including the certification process, which ensures that products are interoperable with other Wi-Fi certified products supporting the same standard and meets other requirements.

What is Wi-Fi 6?
Wi-Fi 6 is the most recent generation of Wi-Fi technology that conforms to the IEEE 802.11ax standard. It delivers multiple new features that improve performance and efficiency in crowded Wi-Fi environments and for IoT applications.

Funding Wi-Fi Innovation
As consumer, enterprise and IoT usage continues to push the envelope for new features and improved performance and reliability in increasingly challenging environments, the Wi-Fi development community continues to invest in R&D to meet and exceed these requirements. As a patent pool administrator, Sisvel helps companies that fund this R&D recoup their investment so they can perform more research to deliver even more benefits in future versions.