|By Joe Zeto||
|July 18, 2012 01:51 PM EDT||
Consumers are continuing to adopt multiple connected devices and video content is expected to reach more than 70 percent of global traffic. This growth and the increased reliance on wireless networks is putting stress on existing 802.11a/b/g/n networks. As a result of this high usage, users are likely to experience deteriorated performance, choppy videos and slower load times. At a time when IT managers report that network users are now averaging more than one Wi-Fi connected device per person, solutions to handle the rapid growth of devices are at a premium.
The next generation of the 802.11 standard, or IEEE 802.11ac, promises to finally break the wireless Ethernet gigabit barrier. This technology will deliver higher bandwidth while retaining better quality of experience (QoE) for end users, and is expected to be adopted rapidly into all markets: residential, enterprise, carrier and large venue.
Some of the first applications for 802.11ac's faster speeds will better residential video streaming, data syncing between mobile devices, and data backup. Streaming digital media between devices faster and simultaneously connecting more wireless devices will be some of the starting benefits for consumers and enterprises. In terms of service providers, they will be able to deploy the new technology to offload traffic from congested 3G and 4G-LTE cellular networks, and in dense operator hotspots 802.11ac will supply better performance to more users.
To date, all 802.11 revisions have focused on increasing transport speeds, which lead to higher traffic delivery rates and ultimately to faster response times as experienced by the end user. The introduction of 802.11n brought advances of MIMO (multiple-in, multiple-out) to deliver traffic over multiple spatial streams, and packet aggregation. MIMO delivered marked improvements in physical transport rates, enabling more bits per second to be transmitted than ever before over Wi-Fi. Packet aggregation delivered equally impressive improvements in transport experience, allowing devices to send more data once they had gained access to the wireless media. The new 802.11ac protocol is continuing down this path by preserving aggregation techniques, advancing the physical transport rates yet again, and introducing the concept of parallel transport into Wi-Fi through a technique known as Multi-User MIMO (MU-MIMO), where multiple client devices are receiving packets concurrently.
This is the first time Wi-Fi history that directed traffic can be delivered to multiple client devices at the same time. This ability has significant impact on delivery of content to any location with multiple users, especially where content is revenue-generating or critical.
Achieving Increased Gigabit+ Performance with 802.11ac
In order to reach the best performance, 802.11ac uses a variety of advancements and addresses the need for performance improvement through three primary initiatives:
- Increasing Raw Bandwidth allows for the higher speeds associated with 802.11ac. It makes use of a higher rate encoding scheme known as 256-QAM, which transmits 33 percent more data than the 64-QAM used in the 802.11n standard. Signal-to-noise ratios that worked for 802.11n are no longer sufficient because the difference in detectable signal level is now significantly smaller.
- Multi-user Support makes 802.11ac a real information superhighway, unlike its predecessors that only allowed one device to transmit at a time. MU-MIMO allows an access point to transmit data to multiple client devices on the same channel at the same time. It works by directing some of the spatial streams to one client and other spatial streams to a second client. MU-MIMO is critical to performance improvements in environments with high client counts.
- Individual Client Channel Optimization is also a major performance booster. The concept behind channel optimization is transmit beamforming (TxBF). The reflections and attenuations, common during the transmission of 802.11 signals, have a significant performance impact on overall network performance. With TxBF, the access point communicates with the client devices to determine the types of impairment that are present in the environment. Then the access point "precodes" the transmitted frame with the inverse of the impairment such that when the next frame is transmitted and transformed by the medium, it is received as a clean frame by the client. Since no two clients are in the same location, TxBF needs to be applied on a client-by-client basis and constantly updated to reflect the changing environment.
Overcoming Technical Challenges
One of the biggest frustration for developers and users of 802.11 is that it needs to work with previous versions. It can also be extremely difficult to identify the root cause of development problems. For example, when an application performs poorly, it is often hard to determine if it is due to an environmental, client, or network issue. The various devices in an 802.11 network are highly correlated so an issue in one area quickly ripples through to many other areas. Developers have lacked an effective means to assess the total picture from the RF to the application layer.
IEEE 802.11ac makes this problem significantly more challenging. In addition to being deployed into an existing environment with ten years' worth of previous releases, 802.11ac makes use of advanced technologies that are substantially more complex and demanding than previous versions. This latest generation of 802.11 requires a rethinking of how the technology is developed and tested to include a much more holistic view through the product development life cycle.
Traditionally, the RF section is verified using one set of equipment, and then the upper layer functions are tested using a second set of tools. The overall technical complexity and the introduction of new technologies such as TxBF demand coordination and control between the different layers of the protocol stack. Without this coordination, it would be difficult to utilize these functions and to quickly pinpoint performance issues.
802.11ac brings the promise of moving Wi-Fi into the limelight as a trusted and capable communication protocol, and will require equipment and rigor to match. The new generation of testing should be able to decode every frame in real-time and determine each frame's RF characteristics, as well as their frame-level performance, and generate every frame without limitation in real-time to adequately test receiver performance. Previous approaches use a digitized data record approach for both generation and analysis, creating or capturing what are known as I/Q files, and equipment typically adapted from the general-purpose RF domain. This result in equipment being capable of a single spatial stream, and able to generate or capture a small fraction of the frames required to perform testing. To meet the need, the approach needs to be able to generate and analyze all frames in real-time to the limit of the specification, tightly integrate RF and MAC functionality in 802.11ac, and include integral, real-time channel emulation to address TxBF performance.
Increasing Performance for All Markets
Gigabit+ performance for residential, enterprise, carrier and large venue markets is possible with the 802.11ac standard. But to realize the performance and density promise, chip and hardware developers must navigate some significant technical challenges, as detailed in this article. They must ensure graceful migrations from existing deployed solutions by providing backward compatibility and delivering high performance RF transmission and receive performance with a wide variety of signals. They must maintain high performance to multiple clients under the channel conditions that will exist in real deployments, while at the same time provide the high reliability and feature robustness to enable enterprise and carrier grade 802.11 adoption. Ultimately, the developers need to ensure that the key application traffic - most notably video - can be delivered with quality.
SYS-CON Events announced today that Harbinger Systems will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Harbinger Systems is a global company providing software technology services. Since 1990, Harbinger has developed a strong customer base worldwide. Its customers include software product companies ranging from hi-tech start-ups in Silicon Valley to leading product companies in the US and large in-house IT organizations.
Oct. 30, 2014 06:00 PM EDT Reads: 3,103
SYS-CON Events announces a new pavilion on the Cloud Expo floor where WebRTC converges with the Internet of Things. Pavilion will showcase WebRTC and the Internet of Things. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devices--computers, smartphones, tablets, and sensors – connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades.
Oct. 30, 2014 05:30 PM EDT Reads: 2,153
The only place to be June 9-11 is Cloud Expo & @ThingsExpo 2015 East at the Javits Center in New York City. Join us there as delegates from all over the world come to listen to and engage with speakers & sponsors from the leading Cloud Computing, IoT & Big Data companies. Cloud Expo & @ThingsExpo are the leading events covering the booming market of Cloud Computing, IoT & Big Data for the enterprise. Speakers from all over the world will be hand-picked for their ability to explore the economic strategies that utility/cloud computing provides. Whether public, private, or in a hybrid form, clo...
Oct. 30, 2014 05:30 PM EDT Reads: 1,126
SYS-CON Events announced today that Gridstore™, the leader in software-defined storage (SDS) purpose-built for Windows Servers and Hyper-V, will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Gridstore™ is the leader in software-defined storage purpose built for virtualization that is designed to accelerate applications in virtualized environments. Using its patented Server-Side Virtual Controller™ Technology (SVCT) to eliminate the I/O blender effect and accelerate applications Gridsto...
Oct. 30, 2014 02:00 PM EDT Reads: 2,531
SYS-CON Events announced today that Red Hat, the world's leading provider of open source solutions, will exhibit at Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Red Hat is the world's leading provider of open source software solutions, using a community-powered approach to reliable and high-performing cloud, Linux, middleware, storage and virtualization technologies. Red Hat also offers award-winning support, training, and consulting services. As the connective hub in a global network of enterprises, partners, a...
Oct. 30, 2014 12:15 PM EDT Reads: 2,055
As the Internet of Things unfolds, mobile and wearable devices are blurring the line between physical and digital, integrating ever more closely with our interests, our routines, our daily lives. Contextual computing and smart, sensor-equipped spaces bring the potential to walk through a world that recognizes us and responds accordingly. We become continuous transmitters and receivers of data. In his session at Internet of @ThingsExpo, Andrew Bolwell, Director of Innovation for HP’s Printing and Personal Systems Group, will discuss how key attributes of mobile technology – touch input, senso...
Oct. 30, 2014 12:00 PM EDT Reads: 1,693
The Internet of Things (IoT) is making everything it touches smarter – smart devices, smart cars and smart cities. And lucky us, we’re just beginning to reap the benefits as we work toward a networked society. However, this technology-driven innovation is impacting more than just individuals. The IoT has an environmental impact as well, which brings us to the theme of this month’s #IoTuesday Twitter chat. The ability to remove inefficiencies through connected objects is driving change throughout every sector, including waste management. BigBelly Solar, located just outside of Boston, is trans...
Oct. 30, 2014 11:00 AM EDT Reads: 2,157
Connected devices and the Internet of Things are getting significant momentum in 2014. In his session at Internet of @ThingsExpo, Jim Hunter, Chief Scientist & Technology Evangelist at Greenwave Systems, will examine three key elements that together will drive mass adoption of the IoT before the end of 2015. The first element is the recent advent of robust open source protocols (like AllJoyn and WebRTC) that facilitate M2M communication. The second is broad availability of flexible, cost-effective storage designed to handle the massive surge in back-end data in a world where timely analytics...
Oct. 30, 2014 08:00 AM EDT Reads: 1,541
Internet of @ThingsExpo Silicon Valley announced on Thursday its first 12 all-star speakers and sessions for its upcoming event, which will take place November 4-6, 2014, at the Santa Clara Convention Center in California. @ThingsExpo, the first and largest IoT event in the world, debuted at the Javits Center in New York City in June 10-12, 2014 with over 6,000 delegates attending the conference. Among the first 12 announced world class speakers, IBM will present two highly popular IoT sessions, which will take place November 4-6, 2014 at the Santa Clara Convention Center in Santa Clara, Calif...
Oct. 30, 2014 07:30 AM EDT Reads: 2,245
The Internet of Things (IoT) promises to evolve the way the world does business; however, understanding how to apply it to your company can be a mystery. Most people struggle with understanding the potential business uses or tend to get caught up in the technology, resulting in solutions that fail to meet even minimum business goals. In his session at Internet of @ThingsExpo, Jesse Shiah, CEO / President / Co-Founder of AgilePoint Inc., will show what is needed to leverage the IoT to transform your business. He will discuss opportunities and challenges ahead for the IoT from a market and tec...
Oct. 29, 2014 11:00 PM EDT Reads: 1,502
SYS-CON Events announced today that TeleStax, the main sponsor of Mobicents, will exhibit at Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. TeleStax provides Open Source Communications software and services that facilitate the shift from legacy SS7 based IN networks to IP based LTE and IMS networks hosted on private (on-premise), hybrid or public clouds. TeleStax products include Restcomm, JSLEE, SMSC Gateway, USSD Gateway, SS7 Resource Adaptors, SIP Servlets, Rich Multimedia Services, Presence Services/RCS, Diame...
Oct. 29, 2014 05:00 PM EDT Reads: 1,610
From a software development perspective IoT is about programming "things," about connecting them with each other or integrating them with existing applications. In his session at @ThingsExpo, Yakov Fain, co-founder of Farata Systems and SuranceBay, will show you how small IoT-enabled devices from multiple manufacturers can be integrated into the workflow of an enterprise application. This is a practical demo of building a framework and components in HTML/Java/Mobile technologies to serve as a platform that can integrate new devices as they become available on the market.
Oct. 29, 2014 02:15 PM EDT Reads: 2,049
SYS-CON Events announced today that O'Reilly Media has been named “Media Sponsor” of SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. O'Reilly Media spreads the knowledge of innovators through its books, online services, magazines, and conferences. Since 1978, O'Reilly Media has been a chronicler and catalyst of cutting-edge development, homing in on the technology trends that really matter and spurring their adoption by amplifying "faint signals" from the alpha geeks who are creating the future. An...
Oct. 29, 2014 01:00 PM EDT Reads: 1,569
SYS-CON Events announced today that Aria Systems, the recurring revenue expert, has been named "Bronze Sponsor" of SYS-CON's 15th International Cloud Expo®, which will take place on November 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Aria Systems helps leading businesses connect their customers with the products and services they love. Industry leaders like Pitney Bowes, Experian, AAA NCNU, VMware, HootSuite and many others choose Aria to power their recurring revenue business and deliver exceptional experiences to their customers.
Oct. 29, 2014 10:00 AM EDT Reads: 2,104
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace.
Oct. 29, 2014 10:00 AM EDT Reads: 2,041
The Internet of Things (IoT) is going to require a new way of thinking and of developing software for speed, security and innovation. This requires IT leaders to balance business as usual while anticipating for the next market and technology trends. Cloud provides the right IT asset portfolio to help today’s IT leaders manage the old and prepare for the new. Today the cloud conversation is evolving from private and public to hybrid. This session will provide use cases and insights to reinforce the value of the network in helping organizations to maximize their company’s cloud experience.
Oct. 29, 2014 09:00 AM EDT Reads: 2,068
As a disruptive technology, Web Real-Time Communication (WebRTC), which is an emerging standard of web communications, is redefining how brands and consumers communicate in real time. The on-going narrative around WebRTC has largely been around incorporating video, audio and chat functions to apps. In his session at Internet of @ThingsExpo, Alex Gouaillard, Founder and CTO of Temasys Communications, will look at a fourth element – data channels – and talk about its potential to move WebRTC beyond browsers and into the Internet of Things.
Oct. 29, 2014 08:00 AM EDT Reads: 1,619
SYS-CON Events announced today that Gigaom Research has been named "Media Sponsor" of SYS-CON's 15th International Cloud Expo®, which will take place on November 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Ashar Baig, Research Director, Cloud, at Gigaom Research, will also lead a Power Panel on the topic "Choosing the Right Cloud Option." Gigaom Research provides timely, in-depth analysis of emerging technologies for individual and corporate subscribers. Gigaom Research's network of 200+ independent analysts provides new content daily that bridges the gap between break...
Oct. 28, 2014 11:45 PM EDT Reads: 1,645
We certainly live in interesting technological times. And no more interesting than the current competing IoT standards for connectivity. Various standards bodies, approaches, and ecosystems are vying for mindshare and positioning for a competitive edge. It is clear that when the dust settles, we will have new protocols, evolved protocols, that will change the way we interact with devices and infrastructure. We will also have evolved web protocols, like HTTP/2, that will be changing the very core of our infrastructures. At the same time, we have old approaches made new again like micro-services...
Oct. 28, 2014 03:00 PM EDT Reads: 1,593
The Industrial Internet revolution is now underway, enabled by connected machines and billions of devices that communicate and collaborate. The massive amounts of Big Data requiring real-time analysis is flooding legacy IT systems and giving way to cloud environments that can handle the unpredictable workloads. Yet many barriers remain until we can fully realize the opportunities and benefits from the convergence of machines and devices with Big Data and the cloud, including interoperability, data security and privacy.
Oct. 28, 2014 12:00 PM EDT Reads: 1,942