The Future of Wi-Fi Technology: Looking Ahead to the Future. Osama Aboul-Magd The Chair of IEEE ac, IEEE HEW SG

Transcription

1 The Future of Wi-Fi Technology: Looking Ahead to the Future Osama Aboul-Magd The Chair of IEEE ac, IEEE HEW SG

2 Content Wi-Fi Technology Evolution Wi-Fi Deployment Trends Future Challenges Wi-Fi Future Directions

3 The advance of technology is based on making it fit in so that you don t really notice it, so it becomes part of everyday life Bill Gates

4 Wi-Fi Everywhere Public Transportation hot spot Public Area Healthcare Residential Large Corporation SMB Schools

5 Evolution of Wi-Fi Technology: The Holly Grail Mainly driven by technological advances in communication Systems and signal processing OFDM MIMO MU MIMO (??) The main focus has been on increasing link throughput usually by an order of magnitude 54 Mbps (a/g) 100 Mbps (n) 1000 Mbps (ac) 10 Gbps (??) Strong desire to maintain backward compatibility allowing legacy devices (a/b/g) to work with advanced devices (n/ac)

6 IEEE Technology Evolution Motivated by advances in technology as well as increased popularity, IEEE WLAN supported data rates have increased 1000,000,00 times over the past 2 decades IEEE Legacy HT and VHT mmwave White Spaces Sub 1 G A/B/G N AD AF AH AC 2.4 and 5GHz Bands Extensions to New Bands 6

7 State of the Art: IEEE ac Operates in the 5GHz band. In the 2.4 GHz, an 11ac device behaves like an n device. Key features that enable data rates up to 6.9 Gbps Up to 8 antennas and spatial streams Wider channel bandwidth (20/40/80/160/80+80 MHz) Downlink Multi-User MIMO 256 QAM First generation ac chips are already available in the market Supporting data rate up to 1.3 Gbps (3 spatial streams and 80 MHz) Usage cases cover both enterprise and home 45% of Enterprise plan to deploy IEEE ac in their production network Focus is on link throughput, rather than efficient use of spectrum resources 11ac is backward compatible with 11a and 11n.

8 Contents Wi-Fi Technology Evolution Wi-Fi Deployment Trends Future Challenges Wi-Fi Future Directions

9 Wi-Fi is playing an increasingly important role in Enterprise Networks

10 The Road to Mobility 1980 s 1990 s 2000 s 2010 s and beyond Dumb terminals connected to a central mainframe IBM and its SNA were dominant Smart desktops Distributed connectivity Routers and Ethernet switching are dominant Devices with WiFi interfaces appear in the market End users get a taste of mobility Cloud-based services Mobility and BOYD Over the past decades Enterprise networks have evolved in tune with technological advances in networking. Evolution was aided by the increased network speeds. Wireless LAN allowed Enterprise customers to enjoy mobility. Mobility is now entrenched as one of the features that must be supported.

11 Enterprise WLAN Wi-Fi allow Enterprise users to enjoy mobility. AC Wi-Fi interfaces available on almost all devices led the Enterprise to switch from single-device support to bring you own device (BYOD) paradigm. AP

12 Enterprise Wi-Fi Deployment Trends- Increased Mobility Increased support for mobility Percentage of mobile devices is increasing 31% support a majority of mobile devices Migration from singledevice support to BYOD Mobile Devices as Percentage of Total Wireless Clients less than 10%, 21% 10%-24%, 23% More than 75%, 10% 25%-49%, 22% 50%-70%, 21% InformationWeek 2013 Wireless LAN Survey of 419 business technology professionals, December 2012

13 Enterprise Wi-Fi Deployment Trends- More Wireless Traffic More and more traffic is crossing the wireless infrastructure Enterprise is moving from an 80:20 (wired:wireless ports) model to 20:80 model Increased traffic volume demands higher available bit rate. Change in Wireless Traffic Over the Past Year Decreased, 1% Don't know, Stayed the same, 3% 11% Increased somewhat, 64% Exploded, 21% InformationWeek 2013 Wireless LAN Survey of 419 business technology professionals, December 2012

14 Unit shipments (%) Enterprise Wi-Fi Deployment Trends- Migration to n Migration from legacy to faster technologies supporting higher data rates. 100% 80% 60% 40% 20% 0% Access Points by Technology: a/b/g vs n vs ac CY10 CY11 CY12 CY13 CY14 CY15 CY16.11a/b/g.11n.11ac Infonetics research Inc, 2Q12

15 Enterprise Wi-Fi Deployment Trends Dual/Triple Band Devices Legacy Triple Band N (2.4G), AC (5G), AD (60G) Dual Band N Single band N Dual Band N Total Shipments ~ 1.5 Billion Dual BAND AC (5G) and N (2.4G) Total Shipments ~ 3.0 Billion

16 Huawei WLAN Product Development

17 Huawei s Vision High Performance High-density cover solution High Availability Dynamic load sharing Intra-AC Layer2/3 Roaming Smart Management Integrated wireless security BYOD solution Wireless location management Smart terminal identification

18 Huawei s Portfolio a/b/g/n AP a/b/g/n/ac AP Indoor Outdoor 11ac AP AP5010SN(300Mbps) AP5010DN(300Mbps x2) Small or midsize enterprises AP6010SN(300Mbps) AP6010DN(300Mbps x2) Midmarket AP6510DN (300Mbps x2) 2x2 Dual Band, GE RJ45 Uplink, PoE Power supply AP5030DN/AP5130D N(V2R5) Indoor 11ac dual-band AP, 1.75Gbps AP6310SN(150Mbps) Indoor distributed Access Points AP7110SN(450 Mbps) midsize enterprises AP7110DN(450Mbps x2) midsize enterprises AP6610DN (300Mbps x2) 2x2 Dual Band, GE SFP/RJ45 Uplink, AC Power supply AP7030DE(V2R5) Indoor 11ac dual-band AP, 1.75Gbps WLAN AC AC6005(8~128AP) AC6605(64~512AP) S97/S77 ACU2 (V2R5)

19 Huawei 11ac Products: AP 7030DE a/b/g MIMO: none Frequency width: 20 MHz Coding format: QPSK/DPSK/DBPSK Transmission rate: 11M/54Mbps n MIMO: simultaneous transmission of up to 4 spatial streams Frequency width: 20 MHz 40 MHz Coding format: maximum of 64QAM Frame aggregation Transmission rate: Mbps ac MIMO: simultaneous transmission of up to 8 spatial streams Frequency width: 80 MHz, 160 MHz Coding format: maximum of 256QAM Frame aggregation Transmission rate: 400M-6Gbps Key features 1.3Gbps@5G, 3x3 MIMO, 256QAM, 80MHz 580Mbps@2.4G, 256QAM, 40MHz Spectrum analysis Smart Antenna Beamforming 11ac compatible with 11n Benefits to Customers The 1.3 Gbps bandwidth brings a leap in the wireless network access rate ac mitigates problems of QoS, channel collision, and interference The high network access rate and good network performance greatly improve user experience ac APs reduce power consumption

20 Contents Wi-Fi Technology Evolution Wi-Fi Deployment Trends Future Challenges Wi-Fi Future Directions

21 Looking Ahead to the Future: What Comes Next? Wireless LAN technology will continue to evolve to satisfy emerging and future requirements. However there are challenges.

22 Traffic Growth Annual global IP traffic will pass the Zettabyte threshold by end of IP traffic has been dominated by video traffic Video traffic will be 55% of all consumer Internet traffic by 2016

23 Emerging Usage Cases Cloud based applications supporting VDI (Virtual Desktop infrastructure) access and VHD video streaming. Cloud-based VDI requirements are: 100 Mbps, best effort. Video requirements are: ~600Mbps, jitter is <20 ms, delay is < 20ms, 1.0E-7 PER. 22 combined media users result in an Aggregate bandwidth requirement of 22*( )Mbps=15.4Gbps

24 Enterprise Cloud Computing Cloud Traffic Growth by Region Source: Cisco Global Cloud Index: Forecast and Methodology, Higher adoption of Cloud services require bigger pipe/higher bandwidths, and the implementation of converged networks

25 Example Future Usage Case: Public Access and Cellular Offload Airports and train stations are typical places where many service providers install their APs and many passengers use WLAN services. Talking over video phone VPN access to the office streaming video

26 Challenges Modulation and coding gain is approaching its theoretical limits. Further increase in link throughput may not be easy. Wi-Fi technology is penetrating the carrier space with possibly different set of requirements for offloading, e.g QoS/QoE support. Dense stations and access points deployments are now the norm. Access for all should be maintained. Traditionally deployed indoor, Wi-Fi is increasingly deployed outdoor with different channel conditions. Large discrepancy between useful throughput (Goodput) and physical layer throughput. Spectrum availability is subject of government regulations. Martin Sims, of the UK organization Policy Tracker, asked the regulators and ministers in attendance to ponder if radio spectrum is as important for economic growth in the 21st century, as oil was in the 20th century. Promotes efficient use of the available spectrum resources. What to do with legacy devices?

27 Wi-Fi Technology Evolution Wi-Fi Deployment Trends Future Challenges Wi-Fi Future Directions

28 WLAN Inefficiency Factors With the increasing dependency on Wi-Fi technology, attention is now turning to efficient use of available resources. Several factors are contributing to inefficiencies in current WLAN Deployments Protocol issues Too many management frames used for association Medium Access Control (MAC) issues MAC layer throughput is low compared to PHY row throughput Existence of legacy devices Severely impacts overall performance Interference Overlapping BSS (OBSS) and other sources of interference

29 WLAN Standards: Future Directions The IEEE WG has formed a new SG with the objective to define a new project with the objective to achieve a highly efficient WLAN The SG name is High Efficiency WLAN or HEW Huawei was among the leaders in the formation of the HEW SG Currently Huawei holds the chair position of HEW The HEW SG had its first meeting in May Huge interest in the new activity The goal to define project scope and feasibility analysis by mid next year.

30 Where HEW May Fit in IEEE WG IEEE Legacy HT and VHT mmwave White Spaces Sub 1 G A/B/G N HEW AD AF AH AC 2.4 and 5GHz Bands Extensions to New Bands HEW is likely to focus on improved and efficient operation of 11n and 11ac

31 High Efficiency WLAN (HEW) SG High Efficiency WLAN (HEW) study group may result in a new flavor of IEEE WLAN. HEW stated focus: Improving spectrum efficiency and area throughput Improve real world performance in indoor and outdoor deployments In the presence of interfering sources, dense heterogeneous deployments In moderate to heavy user loaded APs.

32 HEW SG Tenets (1/2) Spectrum Efficiency and Area Throughput Area Throughput = (Modulation & Coding Gain) X BSS density Modulation & Coding Gain is approaching its theoretical limits. Increasing BSS density is one way for increasing Area Throughput. Dense deployments of stations and access points is among the main discussion points in HEW. Indoor and outdoor Traditionally WLAN specs focused on indoor analysis. Inclusion of outdoor may result in some changes in WLAN design

33 HEW SG Tenets (2/2) Interfering sources, dense heterogeneous deployments Improve performance with multiple OBSS deployed and managed by different authorities. Moderate to heavy loads Can WLAN really offer any QoS/QoE guarantees? WLAN operates in unlicensed bands where it is difficult to predict sources of interference.

34 HEW Potential With less emphasize on link throughput, HEW has the potential to provide a new flavor of WLAN Improved area throughput and cell-edge performance Collaboration rather than coexistence between neighboring BSSs. Use of spectral efficient modulations, e.g. OFDMA and its associated scheduler for enhanced QoS/QoE.

35 Coordinated Transmissions COEXISTENCE COLLABORATION AP1 AP2 AP1 AP2 Sensing STA1 STA2 Interference STA3 STA4 STA1 STA2 Interference Suppression STA3 STA4 One AP transmission at a given time Multiple AP transmissions at a given time

36 Efficient Use of Spectrum Spectrum gaps are filled by other users Freq. Freq. Ch.8 Ch.7 Ch.6 Ch.5 Ch.4 Ch.3 Ch.2 Ch a n 40 MHz ac 80 MHz ac 160 MHz Time Ch.8 Ch.7 Ch.6 Ch.5 Ch.4 Ch.3 Ch.2 Ch.1 MU-MC Capable STA a MU-MC Capable STA n 40 MHz MU-MC Capable STA ac 80 MHz MU-MC Capable STA or, ac 160 MHz Time

37 Closing Remarks Wi-Fi technology is playing an increasing role as part of the Enterprise. Traditionally, IEEE amendments have focused on increasing single link throughput. Wi-Fi industry is looking for ways to improve Wi-FI efficiency HEW SG is focusing on improving the efficiency of WLAN deployment. HEW effort has the potential to introduce a new flavor of WLAN. Huawei is leading the industry through product announcements and standard participation.

38 Thank you Copyright 2012 Huawei Technologies Co., Ltd. All Rights Reserved. The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.