Huawei AirEngine Wi-Fi 6 Products - cioperm.ru
Transcript of Huawei AirEngine Wi-Fi 6 Products - cioperm.ru
Huawei AirEngine Wi-Fi 6 Products
Wi-Fi 6 Standard: Huawei Submitted 15% (240) of All New Wi-
Fi 6 Proposals, Ranking No.1 Among All Device Vendors
Osama, Huawei expert
Chairman of the 802.11ac/ax
Standard Group
2014 2015 2016 2017 2018 2019 2020
First Wi-Fi 6 AP in the industryCommercial use of Huawei
Wi-Fi 6 APs
Built-in AP
Hongkou North Bund,
Shanghai
First 10G Wi-Fi prototype
Huawei holds 7 seats in the 802.11
standard groups:
• Edward: Chairman of the 802.11ay
Standard Group
• Donald Eastlake: Chairman of the
802.11ak Standard Group
• Yunsong Yang: Vice-Chairman of
802.11aq/ba Standard Group
• Jiamin Chen: Chairman of the
802.11aj Standard Group Data by end of 2018
Number of Wi-Fi 6 proposals
Huawei
Cisco
HPE
Extreme
H3C
Arris (Ruckus)
240
26
7
26
0
2
Product Technology Industry Case
Interop Tokyo 2019
Best of show award
Grand-prize
High Bandwidth Low LatencyLarge Capacity
• Up to 9.6 Gbps
• 4 x higher bandwidth
Low Power
Consumption
What Does Wi-Fi 6 Bring (VS Wi-Fi 5)?
1024-QAM
8x8 MU-MIMO
User 1
User 2
User 3
User 4
Frequency
Time
UL/DL OFDMA
UL/DL MU-MIMO
• 1024 access users (per AP)
• 4 x higher concurrent capacity
OFDMA
Spatial Reuse
• Uplink ordered scheduling, latency
reduced to 20 ms
• Average latency lowered by 50%
TWT
20MHz-Only
• Target time wakeup (TWT)
mechanism
• Terminal power consumption
reduced by 30%
Innovative Smart Antenna Design
4 elementsThe most elements per antenna in the industry
12 antennasThe most antennas in
the industry
Huawei's high-gain smart antennas
Signals follow terminals, at any location
Beamforming, with wider coverage
232 direction combinationsThe most combination modes in the industry
15 dB interference suppression
The strongest anti-interference capability
in the industry
Two benefits
20%↑
Product Technology Industry Case
Why Huawei Wi-Fi 6?
Unique SmartRadio technology automatically detects air interface quality, intelligently optimizes networks,
and effectively improves network capacity and user experience.
Dynamic Channel
Assignment (DCA)
Dynamic Frequency
Selection (DFS)
Dynamic Bandwidth
Selection (DBS)
Based on traffic information and
spectrum resources, preferentially
allocates more network resources
to areas with a high traffic volume
to improve user experience.
Divides APs into several calibration
groups, assigns channels to each
group, and assigns a proper
channel to each AP.
Automatically adjusts AP frequency
bands based on the region topology,
identifies and shuts down redundant
radios, reduces interference, and
improves system capacity.
Before adjustment After adjustment2.4G
Channel: 1
Bandwidth: 20 MHz
Channel: 44
Bandwidth: 40 MHz
Channel: 6
Bandwidth: 20 MHz
Channel: 149
Bandwidth: 20 MHz
Channel: 6
Bandwidth: 20 MHz
Channel: 60
Bandwidth: 80 MHz
Channel: 11
Bandwidth: 20 MHz
Channel: 52
Bandwidth: 40 MHz
5G
Channel: 11
Bandwidth: 20 MHz
Channel: 165
Bandwidth: 20 MHz
2.4G
5G
AP D
AP C
AP B
AP A
CH 1
CH 6
CH 11
CH 11
AP D
AP C
AP B
AP A
CH 11
CH 6
CH 1
CH 11
Smooth Experience As You Wish
Ap
pli
cati
on
-base
d
ban
dw
idth
allo
cati
on
VR
Voice
Video
Web
Common user
VIP user
User group–based scheduling
Services of higher-priority users are preferentially scheduled.
Air interface slice scheduling
Air interface slicing technology reduces the transmission latency to 10 ms.
Application scheduling
Common user VIP user
Dynamic Turbo TM
Product Technology Industry Case
Lossless Roaming Without Service Interruption
AGV
AGV
CH1
AGV
AGV
AGV
CH6 CH11
Edge intelligencePath guidance before roaming, improving efficiency by 100%
1
Device-pipe synergyService data is cached during roaming and is not lost.
2
Seamless resumabletransmissionData is replayed after roaming, ensuring no service interruption.
3
Lossless Roaming TM
Product Technology Industry Case
How Wi-Fi 6 Lowers the Power Consumption of Terminals
Target Wakeup Time
(TWT)
Negotiate when to wake up Wi-Fi
Factor affecting the battery service life of terminals: High power-consuming applications
AP
STA1
STA2
t
BeaconTrigger
TriggerTW1
TW2
Awake
Awake
Sleep
Sleep
Sleep
Wake up Wi-Fi on demand,
reducing power consumption
by 30%
Wi-Fi 6 product portfolio
AP4051-TN
AP7x52DN
AP8x80
AP2051DN
AP9x30
Enterprise/Office
Middle and primary school
Hotel/Dormitory
R25xD
Retail Store AP4050DN-E
Outdoor AP8x30
AP8x50
High-Density AP8050TN-HD
AP4050DN-HD
AP5510-W-GP
Vehicle-mounted
AP6x50DN
AP4x51DN
AP7060DN AirEngine5760-10AirEngine8760-X1-PRO
AP9431
AirEngine6760-X1/X1E
AirEngine5760-51
AirEngine5760-22W
AirEngine5760-22WD
AirEngine9700D-M
AirEngine8760R-X1
AirEngine8760R-X1E
AirEngine6760R-51
AirEngine6760R-51E
AP705xDE
AP6052DN
AP4050DN
AP4050DE-M
AP2051DN-E
R450D
R251D-E
On Sale 13pcsNew Models
TR5 in 2020.03, GA in 2020.05
2 pcs
Product Technology Industry Case
WIFI6WIFI5
Industry's First Commercial Wi-Fi 6 (802.11ax) AP
Intelligent• SmartRadio: Ultra-low latency of 10 ms
• CampusInsight: Identify 85% of network problems
IoT Openness• Cooperation with 30+ top partners
• Wi-Fi & IoT network converge reduces TCO by up to 50%
Virtual Reality (VR)
Interactive Class
High-Density Coverage
IoT-Powered Office
Connecting people
and IoT terminals
400+ users per AP
100 Mbit/s per user
Latency < 15 ms
AP7060DN
• 8*8 DL MU-MIMO, 1024QAM, DL OFDMA
• 2.4GHz: 1.15 Gbit/s + 5GHz: 4.8 Gbit/s
• IoT expansion
Ultra-High Speed
• 4 x Higher peak bandwidth
• 4 x greater concurrency
Wi-Fi 6 Indoor Flagship AP AirEngine 8760-X1-PRO
IoT & Wi-Fi Converge
16 Spatial Stream Throughput
10.75Gbps
2.4G 4*4+5G 12*12 or 2.4G 4*4+5G-1 4*4+5G-2 8*8
SmartAntenna+ Smart Radio
SmartAntenna
Coverage Improved by 20%
Smart Radio(DFS、DCA、DBS)
EDCA Schedule
Seamless RoamIoT&WiFi(Built-in)
Thread
AirEngine 8760-X1-PRO
16 Stream High Performance, High Reliability
Dual-PoEOptical:10GE SFP+Copper:10GE*2
10GE 10GE
Independent Scan
Product Technology Industry Case
Wi-Fi 6 Indoor AP AirEngine 6760-X1/X1E
IoT & Wi-Fi Converge
4(2.4GHz)+6(5GHz) Spatial Stream,Throughput 8.35G
2.4G 4*4MIMO
Radio 2Radio 1
5G 2.4G5G 6*6MIMO
1.15Gbps7.2Gbps
Independent Scan Radio,Interference Avoid
Built-in IoT ModuleBLE/Zigbee/RFID/Thread
AirEngine 6760-X1/X1E
High Reliability Design
• 10GE Copper+10G SFP+Optical
• DTLS 、IPSec
• WEP, PSK/PPSK, 802.1X,
WPA/WPA2/WPA3、WAPI
SmartAntenna+ Smart Radio
SmartAntenna
Coverage Improved by 20%
Smart Radio(DFS、DCA、DBS)
EDCA Schedule
Seamless Roam
Product Technology Industry Case
Wi-Fi 6 Indoor AP AirEngine 5760-51
6 Spatial Stream
…2.4G 2*2MIMO
0.57Gbps
Radio 2Radio 1
5G 2.4G5G 4*4MIMO4.8Gbps
5.37Gbps Throughput
IoT & Wi-Fi Converge
Independent Scan Radio,Interference Avoid
Built-in IoT ModuleBLE/Zigbee/RFID/Thread
AirEngine 5760-51
SmartAntenna+ Smart Radio
SmartAntenna
Coverage Improved by 20%
Smart Radio(DFS、DCA、DBS)
EDCA Schedule
Seamless Roam
Product Technology Industry Case
Wi-Fi 6 Outdoor AP AirEngine 8760R-X1/X1E
AirEngine8760R-X1E8760R-X1
16 Spatial Stream Throughput 10.75G
10GE Uplink
10GE RJ45+GE RJ45+10G SFP+
• Multi-Giga:10G Opitcal+10GCopper(2.5G/5G)+GE Electrical
• IoT:Built-inBLE/Zigbee/RFID/ThreadExternal PoE out
• Waterproof and dustproof:IP68• Built-in Lightning protection • Operation Temperature: -40℃~+65℃
GE
PoE out Cemera
…
AirEngine 8760R-X1:8+8/4+12/4+8+Independent Scan, Flexible RadioAirEngine 8760R-X1E:8+8 / 4+4+4/4+4+Independent Scan, Flexible Radio
2.4GHz 8T8R,Coverage Distance Improved by 40%
Ultimate Environment
Wired Interface
Radio
Product Technology Industry Case
2.4G 4*4 MIMO
Radio 2Radio 1
5G 2.4G5GHz 4*4 MIMO
Ultimate Environment
Wired Interface
Radio
8 Spatial Stream 4+4,Throughput 5.95G
…
• Waterproof and dustproof:IP68• Built-in Lightning protection • Operation Temperature: -40℃~+65℃
IoT Capability
Wi-Fi 6 Outdoor AP AirEngine 6760R-51/51E
Built-in IoT ModuleBLE/Zigbee/RFID/Thread
Product Technology Industry Case
Exclusive feature: Internal and external IoT
External IoT
module + cardBuilt-in IoT chip
Iot management platformAirEngine series
Controller
+ + +
Bluetooth RFID ZigBee Thread
electronic shelf label: The offering price is automatically updated,Saving 90% manpower
Student health management, constant attention to the state of the body.
Office asset management, improving asset utilization by 100%
Medical IoT, improving hospital services
External IoT: This solution is applicable to the early stage of network construction. The IoT adaptation solution is specified and mature IoT solutions (compatible with
existing solutions) are available.
Built-in IoT: Applicable to enterprises whose current requirements are unclear but need to be connected to the Internet of Things (IoT) in the future. The adaptation
does not need to be performed.
Product Technology Industry Case
①
②③
Built-in IoT
Module interface
CampusInsight: Refined O&M, Source Tracing in Minutes, Network Autonomy and Self-Healing
User journey
Every user, application, and moment is visible, providing refined O&M assurance
Dynamically captures fault data in seconds using telemetry technology.
Records user behavior, senses application quality, and actively manages VIP user experiences.
Network fault prediction and real-time source tracing
Uses historical and real-time dynamic data to optimize the baseline, and predicts network exceptions.
Uses the Wi-Fi network O&M expert fault tree + AI algorithm to analyze the root cause.
Dynamically optimizes user experience to improve user satisfaction. Automatically generates optimization policies, cooperates with the
Agile Controller to optimize the network, and achieves network autonomy and self-healing.
Network autonomy and self-healing provide continued experience enhancement
Product Technology Industry Case
WLAN Professional Tools --The cloud-based WLAN Planner
The cloud-based WLAN Planner is a web-based WLAN planning tool that provides functions such as environment drawing, AP deployment, signal simulation, and report generation. Engineers use cloud network planning to effectively support WLAN planning tasks and improve engineers' work efficiency.Google Chrome browser login website: https://serviceturbo-cloud.huawei.com/serviceturbocloud/#/, select WLAN Planner in the tool application market.Step1. Create a project.
Supports the creation of indoor/outdoor projects based on drawings/Gaude maps.Step2. Automatic obstacle identificationSupports manual drawing and automatic identification of obstacles.
Step3. Regional settings
Areas with different coverage field strength and capacity requirements can be drawn.Step4. One-key automatic deployment
One-click automatic AP deployment and automatic channel calculation based on the drawing area
Step5. View simulation results.
Supports the display of the field strength/signal to interference plus noise ratio simulation diagram.
Step6. Export the report.The Word/PDF report and Excel material list can be exported.
Product Technology Industry Case
Terminals that already support Wi-Fi 6
Samsung S10/Galaxy Note 10 iPhone11/iPhone11pro
Note: The prediction showed that Huawei P40 will support WIFI6 in 2020.
Dell Notebook XPS13
HP Elitebook x360
intel AX200
Netgear AX8/AX12
Smart Phone
Notebook PC
Wireless Card
WIFI6 Router
Asus RT-AX88U TP-Link Archer AX6000ThinkPad
X390/T490/X1 Carbon
Product Technology Industry Case
About Mondragon University
Mondragon University is a private university that ranked eighth-highest in
Spain in 2017. It is part of the Mondragon Corporation, and it has 4600+
students.
Requirements and Challenges
Mondragon University is committed to innovating education models and
the informatization of university infrastructure. It also aims to strengthen
communication between students and teachers. The university's previous
campus network had poor roaming experience, and there was frequent
signal interruption of Wi-Fi networks in classrooms and dormitories.
Meanwhile, network devices were to be out of warranty and needed to be
replaced.
Why Huawei Wi-Fi 6?
• Seamless roaming switching: extends Wi-Fi coverage to every
corner of the campus and provides optimal roaming experience free
from packet loss, ensuring lossless roaming in classrooms and
dormitories.
• Higher user concurrency: Huawei Wi-Fi 6 allows many more users
to access the network concurrently, meeting the Wi-Fi coverage
requirements of high-density scenes such as classrooms and
auditoriums.
• High bandwidth, low latency: Huawei Wi-Fi 6 can satisfy the
network requirements of various modern and innovative teaching
methods, such as distance teaching.
Key Products: AP7060 (Wi-Fi 6), AD9431DN-24X, AP4050DE-M, and
AC6805
Huawei Wi-Fi 6: Optimal Teaching Experience for 4600+ Spanish
Students Anytime
Product Technology Industry Case
ENGIE Fabricom Selects Huawei Wi-Fi 6 to Improve Wireless Experience in the Office About ENGIE Fabricom
ENGIE Fabricom, a Fortune Global 500 company, ranked No. 104 in 2018. In more than
70 countries, ENGIE Fabricom has deployed electricity, gas, and energy services, with the
annual sales revenue of up to US$75.2 billion.
Challenges
ENGIE Fabricom continued to expand its service coverage by adding more office
scenarios such as office mobility, remote video, and voice conferencing. Facing this,
ENGIE Fabricom urgently needed an efficient campus network that quickly responds to
service changes, achieving all-wireless coverage and supporting access of more users.
The new network must also provide high network bandwidth needed for bandwidth-hungry
services such as HD videoconferencing. In addition, the IoT expansion capability is
another must-have of this new network in order to manage numerous assets in the future
and align with the smart building strategy.
Why Huawei Wi-Fi 6?
• Wi-Fi 6 AP 7060DN is deployed in the whole network, providing wireless network up to
6Gbps large bandwidth, 4 x higher concurrent density coverage to support future-
oriented office experiences.
• IoT expansion capability can be compatible with smart building strategy
• Agile Controller 1.0 integrates wire and wireless authentication for user to offer secure
and consistent access experiences for employees..
Key Products: S5720-12TP-PWR-LI,S5720-28X-PWR-SI,5720I-12X-PWH-SI,
S6720-26Q-SI-24S
Product Technology Industry Case
Huawei Wi-Fi 6: High-Quality Wireless Experience for FC Basel Fans in Switzerland About St. Jakob-Park
Located in Basel, St. Jakob-Park is the largest football venue in Switzerland and
home to FC Basel, with 42,500 seats. The venue hosted the 2016 Europa
League final.
Requirements and Challenges
The Wi-Fi network deployed by vendor C faces the following problems: low
concurrency, slow network access rates during peak hours, frame freezing, and
incomplete Wi-Fi coverage. Fans concurrently accessing the network account for
30% of the total people in the stands. Therefore, a high-density Wi-Fi network is
required to improve the experience for fans.
Why Huawei Wi-Fi 6?
• Comprehensive Wi-Fi coverage: Huawei re-plans AP deployment locations
and simulates signals using Huawei-developed network planning tools,
extending Wi-Fi coverage to every corner of the venue.
• Better Wi-Fi experience: Huawei deploys high performing Wi-Fi 6 devices
with high bandwidth indoors, optimizing network experience in indoor scenes
such as canteens and VIP areas.
• Higher concurrency: Huawei deploys a high-density wireless network
outdoors with small-angle directional antennas, supporting concurrent
access of fans.
Key Products: AP7060 (Wi-Fi 6), AP5030DN, AP4050DN-E, and S5720-28TP-
PWR-LI
Product Technology Industry Case
About Netsafe
Netsafe is a well-known ICT service provider in Switzerland. It has a
large customer base, covering sectors such as public, manufacturing,
and FSI.
Challenges
Netsafe always thinks how to serve their customers better and to
provide the best ICT technologies. Netsafe wants to implement Wi-Fi
6 as its WLAN infrastructure for the next five years to provide better
network services to its employees and guests.
Why Huawei Wi-Fi 6?
• Industry's unique smart antenna technology provides better
coverage and stronger signals in office scenarios compared to the
former Wi-Fi technologies.
• Netsafe profits greatly from high throughput performance, for
example, shortening the download time of large files dramatically.
• Huawei Wi-Fi 6 is a perfect choice for high-density scenarios and
allows partners and customers to attend events in the Netsafe
Office.
Key Products: AP7060DN(Wi-Fi 6), S5720-52X-PWR-SI
Huawei Wi-Fi 6 Helps ISP Netsafe Improve Employees' Office Efficiency
Product Technology Industry Case
About Hong Kong International Airport
Hong Kong International Airport, one of the world's largest busiest airports, ranks No. 1 in cargo
traffic and No. 8 in passenger traffic worldwide. It has been rated as one of the world's best
airports for many years.
Requirements and Challenges
As Hong Kong International Airport is a public place with huge crowds, Wi-Fi coverage and user
experience are key considerations for its “Smart Airport” planning. Currently, the High Speed
Zone (HSZ) of the airport experiences poor wireless network signal reception, resulting in many
coverage holes. Also, low network performance is a primary issue that affects user experience.
Due to these reasons, this international airport hopes to provide high-quality network services for
passengers.
Why Huawei Wi-Fi 6?
• Compared with Wi-Fi 5, Huawei Wi-Fi 6 increases the bandwidth by more than 60%, greatly
improving user experiences.
• OFDMA technology enables multiple users to access the network at the same time and
share bandwidth resources.
• Smart antennas help ensure user access experience, offer pervasive coverage at the airport,
and provide online services at all times.
• IoT expansion capability ensures effective deployment of value-added services such as LBS.
Key Products:AP7060DN(Wi-Fi 6),AP7152DN,S12700,S5700,S5730-44C-HI,
S5730-68C-PWH-HI,eSight
Huawei Wi-Fi 6 Offers High-Quality Wi-Fi Services to Hong Kong International Airport, Accelerating Its Smart Airport Process
Product Technology Industry Case
Shenzhen Metro Teams Up with Huawei to Build China’s First 5G+Wi-Fi 6 Metro Station
About Shenzhen Metro
Shenzhen Metro works with Huawei, China Unicom, and other partners to
use 5G for network access and Wi-Fi 6 for network expansion, enabling
perfect convergence of 5G and Wi-Fi 6 technologies.
Requirements and Challenges
Shenzhen Metro adopts the concept of "Operating the Metro for a Better
City" and focuses on the new service mode of “Hi-tech Metro”. It hopes to
use the latest network technologies to improve user experiences of the
metro network and better serve the city and its citizens.
Why Huawei Wi-Fi 6?
• Huawei’s industry-leading third-generation phased array smart
antennas ensure optimal signal coverage at any location.
• Intelligent radio calibration technology helps automatically detect air
interface quality and intelligently optimize networks, effectively
improving network capacity and user experiences.
• Intelligent application acceleration technology and multi-queue packet
scheduling are employed to prevent congestion and shorten the
service delay to 10 ms.
Key Products: AP7060DN(Wi-Fi 6)
Product Technology Industry Case
Huawei Wi-Fi 6 Helps HKU Build a High-Quality Wireless Campus Network
About HKU
The University of Hong Kong (HKU), founded in 1911, has a global ranking of 26
and a total number of over 30,000 teachers and students.
Requirements and Challenges
Network devices in densely populated places like teaching buildings, lecture
halls, and auditoriums are aged. Therefore, improvement of wireless network
coverage is urgent.
HKU is dedicated to constructing a smart campus. It hopes to introduce
advanced technologies such as HD video teaching (4K/8K wireless video) and
AR/VR hybrid reality to innovate teaching methods.
Why Huawei Wi-Fi 6?
• Wi-Fi 6 ensures good roaming experience in the dense user environments
on campus with strong user mobility and frequent roaming needs.
• The number of allowed concurrent users increases significantly, meeting the
requirements of high-density scenarios such as classrooms and auditoriums.
• High bandwidth, high concurrency, and low latency help satisfy the network
needs of multiple modern teaching methods (such as 4K).
• The IoT expansion capability allows more teaching tools and assets to
access the network, accelerating the construction of a smart campus.
Key Products: AP7060DN(Wi-Fi 6),AP7052DN
Product Technology Industry Case
DIFC Uses Huawei Wi-Fi 6 to Improve Wireless Network Experiences for High-Density Guests About DIFC
Dubai International Financial Center (DIFC) is the only financial district in
Dubai. It has more than 2000 financial and technology companies, with about
23,600 employees, and is a representative of innovative and advanced
regions.
Challenges
DIFC has super modern office spaces, retail stores, cafés and restaurants,
art galleries, residences, green public spaces, and hotels. To transform from
an ordinary financial center into an intelligent district, DIFC is taking its first
step of reconstruction to improve the network experiences of guests.
Why Huawei Wi-Fi 6?
• Wi-Fi 6 smart antenna technology provides sub-channels for transmitting
traffic of each user, improving the signal-to-noise ratio (SNR) and
improving guest experiences.
• Huawei Wi-Fi 6 increases the number of concurrent users by four times,
meeting the requirements of high-density scenarios such as the office
space, public green space, and art gallery.
• 100+ concurrent connections and seamless roaming support future-
oriented office experiences such as 4K/8K wireless video conferences.
Key Products: AP7060DN(Wi-Fi 6), AP8182DN, AP8082DN, AP7052DN,
S5720-28X-PWH-LI, S5730-36C-HI,S6720-30C-EI-24S, S6720-30L-HI-24S,
S6720-32C-PWH-SI, eSight
Product Technology Industry Case
Huawei Wi-Fi 6 Assists Saudi Telecom (STC) to Build a High-quality Wireless City Network
About Saudi Telecom
Saudi Telecom is a telecom company that provides fixed-line phones, mobile
phones, interconnection phones, interconnection access, and satellite phone
services.
Challenges
By 2020, 27236 units of public Wi-Fi hotspots will be deployed, including 13,000
units of Wi-Fi 6, covering government offices, universities, hotels, parks, stadiums,
airports, shopping malls, and retail stores. Multiple concurrent users are required
and each user has at least 8 Mbit/s bandwidth, helping customers build high-quality
wireless city networks.
Why Huawei Wi-Fi 6?
• With the same number of APs, the smart antenna technology of Huawei APs
can cover more areas and provide better user experience.
• Open and compatible interconnection capability, supporting interconnection
with Wi-Fi Offloading gateways of multiple vendors
• High-end outdoor AP, IP68 protection level, providing high reliability and high
concurrency capability
• The IoT expansion capability can meet the requirements of future Wi-Fi value-
added service operation.
Key Products: AP7060DN(Wi-Fi 6), AP6050DN, AP8082DN, AP8182DN, S5720, eSight
Product Technology Industry Case
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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
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from those expressed or implied in the predictive statements.
Therefore, such information is provided for reference purpose
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