Fundamental Advance Research Consultancy in Communication (xgnlab) - "Delivering Innovation".
Monday, 26 March 2018
Is WiFi with WBA and WiFi Alliance sufficiently focused to come for 5G?
Saturday, 24 March 2018
HEW - WiFi 802.11ax gearing up for ecosystem gain
802.11ax, also called High-Efficiency Wireless (HEW), has the challenging goal of improving the average throughput per user by a factor of at least 4X in dense user environments. This new standard focuses on implementing mechanisms to serve more users a consistent and reliable stream of data (average throughput) in the presence of many other users.
Looking beyond the raw link speeds of 802.11ac, this new standard implements several mechanisms to serve more users consistent and reliable data throughput in crowded wireless environments.
High-Efficiency Wireless includes the following key features:
Backwards compatible with 802.11a/b/g/n/ac
Increase 4X the average throughput per user in high-density scenarios, such as train stations, airports and stadiums. -Data rates and channel widths similar to 802.11ac, with the exception of new Modulation and Coding Sets (MCS 10 and 11) with 1024-QAM.
Specified for downlink and uplink multi-user operation by means of MU-MIMO and Orthogonal Frequency Division Multiple Access (OFDMA) technology.
Larger OFDM FFT sizes (4x larger), narrower subcarrier spacing (4X closer), and longer symbol time (4X) for improved robustness and performance in multipath fading environments and outdoors.
Improved traffic flow and channel access
Better power management for longer battery life
802.11ax provides greater Wi-Fi speed and does it through making capacity improvements in congested network environments, by supporting more users in dense networks and making more efficient use of spectrum. the difference between 802.11ax and previous Wi-Fi generations may not be very noticeable for a residential Wi-Fi user, compared to the improvements in a dense network with many users. The goal is to increase the data rate in a congested environment by 4x or more."
802.11ax also offers significant power usage improvements. Qualcomm, for instance, claims that its WCN3998 chipset reduces Wi-Fi power consumption by up to 67% compared to 802.11ac Wave 2.
The Wi-Fi technology so far has been based on one-on-one device-to-access point conversations. 802.11ax changes that to multi-user simultaneous support. The capacity increases will make for a better user experience, with 10x more users able to be supported.
802.11ac with MU-MIMO hasn't achieved its full commercial deployment potential and was based on beam-steering. In contrast, 802.11ax makes Wi-Fi more like cellular through the use of OFDM, and scheduling. The technology comes in closer to what LTE is today in competition, also same time cellular is moving to 5G, where also it [802.11ax] usher to write place.
Testing and standardization of 802.11ax
Testing 802.11ax offers up some unique challenges that Wi-Fi testing hasn't previously had to navigate. One of those is synchronization of devices in the uplink using the AP, in order to avoid interference. A trigger frame is sent from the AP to the devices and they must respond for coordination of timing, frequency and power levels. Rohde & Schwarz gives some of the basics of uplink accuracy testing.
802.11ax along with 802.11ac and previous generations, at both 2.4 and 5 GHz, means that test times "could go up dramatically."
Meanwhile, the path to a final standard for 802.11ax has been a rocky one, and the work is still ongoing. As Intel's Dan Artisu, vice president of its client computing group and GM of Intel's connected home division, noted, the standards work continues and the draft which is ultimately adopted — and on which certification is based — may differ enough from earlier drafts that product interoperability could be an issue. The next draft is expected to be voted on mid-2018.
Some in the industry believe that due to the additional complexity of the 802.11ax standard, it is important to get 802.11ax chipsets into the hands of engineers sooner rather than later to help them build devices around the new features. If an OEM does decide to hold back, their first devices integrating an 802.11ax chipset may come 6 to 18 months behind that of the competition. the question for OEMs is whether they should wait until the standard is more stable before adopting an 802.11ax-ready solution. A wait-and-see approach could arguably result in a longer lead time, and some OEMs may lose out to those who are proactive in getting their designs ready for the full version of the standard.
Huawei Showcased Innovations in Intelligent Network Maintenance at the MWC 2018
From Huawei information
At the Mobile World Congress (MWC) 2018, Huawei showcased multiple innovations in intelligent network maintenance, including risk prediction and prevention, fault self-healing, and assistance for intelligent root cause locating. To address various network maintenance challenges, Huawei adopts emerging digital technologies, opening a new era for intelligent maintenance. Huawei is dedicated to helping operators build zero-outage robust networks.
Huawei robust network service solution applies big data analysis, artificial intelligence (AI), and other emerging technologies to network maintenance. This innovative solution predicts and helps prevent some faults. When a fault occurs, the solution provides self-healing and intelligent aided analysis to rapidly identify and rectify the root cause, minimizing the impact on services. Machine learning is used to process repeated and massive data analysis and greatly improves O&M efficiency. This solution intelligently analyzes various historical and live network data to identify risks from multiple dimensions, including hardware sub-health, software running status, network protection, network connection, redundancy reliability, resources and capacity, and service risks. Additionally, special service solutions can be customized based on Huawei's global maintenance knowledge base.
- This pioneering solution uses algorithms extracted from fault models, including the feature preserving projection analysis algorithm, multi-indicator association analysis algorithm, automatic feature mining algorithm, and intelligent partitioning algorithm. These algorithms are used to complete the practice of multiple prediction and prevention subjects at the device layer, network layer, and service layer. The accuracy of predictions is over 85%, and the efficiency of troubleshooting is improved by over 60%.
- The solution uses offline training and online learning engines to constantly optimize prediction models and algorithms and continue enhancing a comprehensive prediction and prevention system.
- The solution implements an intelligent O&M system based on big data technologies, improving O&M and promoting network innovation. It accumulates extensive data on fault recovery experience and network data, to improve predictive and preventive maintenance and network self-healing. In addition, it analyzes the root causes of network issues, helping to constant product improvement.
Huawei's robust network service solution has been successfully implemented and explored in multiple global projects. Through joint innovation, Huawei worked with China Mobile Hainan and used this solution to build an intelligent O&M system based on self-learning to maximize the value of network big data and prioritize preventive maintenance. This project received the Editors' Choice Award 2017 (Mobile Network Innovation Award) from the People's Posts and Telecommunications News Agency in China. Huawei will explore risk prediction and prevention in more scenarios, including 5G, IoT, home broadband, and enterprise customers, and will continue enhancing capabilities in data collection and analysis efficiency, algorithm optimization, and scenario-based fault modeling.
In the future interconnected digital world, robust networks will be the basis for digital service success and a good service experience. Huawei's successful experience in developing innovations for intelligent maintenance accelerates breakthroughs in and applications of key technologies for intelligent O&M, provides a reference for the future construction of intelligent network maintenance systems.
Tuesday, 20 March 2018
WBA pushing on seamless, secure and enhanced coverage next gen WiFi hotspot.
By Tiago Rodrigues, General Manager of the Wireless Broadband Alliance (WBA)
This year at Mobile World Congress (MWC) Barcelona a group of companies, many of them members of the Wireless Broadband Alliance (WBA) together with GSMA, Fira Barcelona and City of Barcelona developed a pilot on Wi-Fi Roaming across a series of hotspots in Barcelona using Passpoint technology and WRIX standards to deliver a seamless and secure roaming service between different networks and service providers.
The goal of this project was to accelerate market understanding and adoption of Passpoint technology, network interoperability and Wi-Fi roaming services based on WRIX standards, creating what WBA defines as Next Generation Hotspot (NGH). This type of project falls in to the Testing and Trials programs from WBA to accelerate business opportunities and technology adoption – something WBA has been doing since 2008.
Over 2200 hotspots were made live; from Fira Gan Via and Fira Montjuic where GSMA MWC is hosted, over 300 APs across Barcelona, in some of the key tourist locations, like the Ramblas, Plaza Catalunya, Passeig de Gràcia, train stations among many other sites in the City and in El Prat Airport.
Overall the plan was to setup a wide coverage of a Wi-Fi/Passpoint/NGH network across MWC Fira Exhibition Center, transportation hubs (airport and train stations) and outdoor coverage in City center. In all these locations Passpoint technology was activated and a specific SSID was set up for the project to deliver to the end users a cellular like experience over the Wi-Fi networks, full automatic connection to the Wi-Fi hotspots – without any manual intervention from the end users.
Who was involved?
Cisco Systems played the role of major technology provider and was supported by Boingo Wireless, Unitronics, CellNex and Think Smarter for all the configurations and testing. All the hotspots where interconnected using the concept of a central roaming Hub facilitated by Boingo Wireless, BSG Wireless and Accuris-Neworks.
Additionally WBA invited service providers with commercial NGH/Passpoint services to join the project and provide roaming to their customers during the duration of MWC Barcelona. Mobile operators, cable operators, ISPs, pure Wi-Fi providers and users from enterprises that already have Passpoint deployed in their offices; all these companies came together and used all these hotspots across Barcelona for their benefit of their customers as if they were at their home network or office.
WBA and GSMA working together
This is not the first time the WBA has promoted a NGH/Passpoint network during major events like MWC Barcelona but this time four major improvements were achieved:
1. Increased coverage beyond the Fira Exhibion Center. The project included private (enterprise Wi-Fi by Fira Barcelona), Municipal Wi-Fi (by City of Barcelona) and Airport Wi-Fi (by AENA, state own company to manage the Spanish airports)
2. Mobilize enterprises users from companies that have already deployed Passpoint at their offices and headquarters, several companies got involved either directly or through iPASS services.
3. Only involved operators / carriers with Passpoint/NGH services commercially available, like AT&T, Charter Communications, Softbank or Boingo Wireless. This decision removed any on-boarding obstacles making a truly seamless experience to all users, just like cellular.
4. Generated anonymized analytics from the multiple hotspots to provide information to all venue owners participating on the project. Think Smart developed real time analytics, including flows and volumes of devices connected by location and flows of movement of those devices across and within the multiples hotspots.
Our thanks to all those who participated.
Over 25 companies participated in this project and WBA had the honor to coordinate this initiative over the last 4 months and work with some of the best industry professionals and Wi-Fi experts. Tremendous amount of data have come out of this initiative but we will leave it to project participants to provide their case studies and reports, so stay tuned.
Project participants: GSMA, WBA, Cisco, Boingo Wireless, City of Barcelona, Fira Barcelona, Unitronics, Cellnex, Think Smarter, BSG Wireless, Accuris Networks, AT&T, T-Mobile US, Sprint, Mobily, Telecom26, Softbank, Shaw Communications, Spectrum (Charter Communications), ER Telecom, iPass and several enterprises with their employees.
Over 50 people were involved on the project and we thank you all for making this happen, but I would like to point out my gratitude to Jordi Cirera and Toni Carol Vilanova (from the City of Barcelona), Alex Williams and Jon France (from GSMA), Carlos Sanchez and Xavier Michavila Asensio (from Fira Barcelona), Mir Alami and Matt MacPherson (from Cisco), Derek Peterson and Kishore Raja (from Bongo Wireless), Antoni Montis (Unitronics), Blaz Vavpetic (from iPASS), Pedro Salvatella (Cellnex) and Brendan O'Brien (from Think Smarter).
Making the vision a reality
This initiative represents somehow my vision for Public Wi-Fi with multiple venue owners working together from private, public and municipal sectors alongside of all types of operators/carriers and enterprise users – Wi-Fi is seamless, interoperable, secure and widely available – an entire ecosystem coming together and WBA and its member are making this vision a reality.
Looking forward for MWC 2019 and to take this initiative to the next level with more coverage, more services and more end users – interested in these type of initiatives? Do you have ideas to make it more valuable? You are welcome and let´s make Wi-Fi seamless, secure and interoperable across the entire ecosystem.