WiMAX Mission Statement - PowerPoint PPT Presentation

Loading...

PPT – WiMAX Mission Statement PowerPoint presentation | free to download - id: 1135b6-N2Y0M



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

WiMAX Mission Statement

Description:

1 BST Modem 18 Mb shared bandwith in most cases can be updated to 72 Mb (with 4 BST Modems) ... cost effective BST design. Applies for Macro and Micro BST ... – PowerPoint PPT presentation

Number of Views:40
Avg rating:3.0/5.0
Slides: 11
Provided by: eki6
Learn more at: http://www.kainuu.fi
Category:
Tags: wimax | bst | mission | statement

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: WiMAX Mission Statement


1
WiMAX Mission Statement
  • The purpose of WiMAX is to promote deployment of
    broadband wireless access networks by using a
    global standard and certifying interoperability
    of products and technologies
  • Writing test specs
  • Qualifying test labs
  • Certifying products
  • Focus on interoperability

WiMAX is the next revolutionary technology after
WiFi!
2
IEEE 802.16a/d/e standards
  • IEEE 802.16a A Fixed Wireless Access standard
  • PtMP, connection oriented MAC layer
  • Three Physical layers OFDM, OFDMA and Single
    Carrier
  • Approved in April 2003
  • IEEE 802.16d now called IEEE 802.16-2004
  • Approved in July 2004
  • Focused on fixed applications
  • Consolidates all amendments and base standard for
    WiMAX
  • IEEE 802.16e A Mobile Wireless Access standard
  • Incorporate features and protocols needed for
    portability/mobility
  • Modes added to enhance portability/mobility
    performance
  • Final approval in December 2005

3
Principal of WiMAX Network
3,5 Ghz up to 20 km
Households
3,5 Ghz up to 20 km
Summer residence
3,5 Ghz up to 20 km
SMEs
4
WiMAX technology - IEEE 802.16
  • WiMAX is designated as the metropolitan area
    network (MAN) technology that can connect IEEE
    802.11 (Wi-Fi) hotspots with each other and to
    other parts of the Internet and provide a
    wireless alternative to cable and DSL for last
    mile (last km) broadband access.
  • However, the field of uses is broader and
    overlaps those for mobile WAN (wide area
    networks) and WLANs. WiMAX provides up to 50 km
    (31 miles) of linear service area range and
    allows connectivity between users without a
    direct line of sight.
  • Note that this should not be taken to mean that
    users 50 km (31 miles) away without line of sight
    will have connectivity.
  • Practical limits from real world tests seem to be
    around "3 to 5 miles" (5 to 8 kilometers).
  • Our experience 5-12km

5
WiMAX technology - IEEE 802.16
The technology has been claimed to provide shared
data rates up to 72 Mbit/s, which, according to
WiMAX proponents, is enough bandwidth to
simultaneously support more than 60 businesses
with T1-type connectivity and well over a
thousand homes at 1Mbit/s DSL-level connectivity.
  • Real world tests, however, show practical maximum
    data rates between 500kbit/s and 2 Mbit/s,
    depending on conditions at a given site
  • Depends on the number of Base Station Modems
  • 1 BST Modem ? 18 Mb shared bandwith in most cases
    can be updated to 72 Mb (with 4 BST Modems)

6
WiMAX - IEEE 802.16
  • No spesification for spectrum Depends on
    permissions
  • 3,5 GHz frequency in Kainuu / Finland
  • lt 2,5 GHz in US, 2.2-2.3 GHz in Asia
  • 700 MHz for analogue TV ? when Digital TV
    rollout complete, it would be available in some
    estimations by 2009

7
Comparison of technologies
Bandwith, Mbit/s
24
Wimax, max. capasity to 90 degree sector
ADSL2
15
VDSL
12
Wimax, LOS
ADSL
8
Wimax, NLOS
ADSL
FLASH-OFDM 450MHz
Distance, Km
1 Km
2 Km
3 Km
4 Km
5 Km
6 Km
7 Km
15 Km
10 Km
8
WiMAX coverage with Line-of-Sight conditions
  • 3.5MHz channels
  • LOS conditions
  • Dual Slope propagation model
  • 10 dB fade margin

Modulation
18 Mb/s
16 Mb/s
13 Mb/s
8 Mb/s
6 Mb/s
4 Mb/s
3 Mb/s
2 Mb/s
Capasity
9
WiMAX coverage with Non-line-of-Sight conditions
  • Dual Slope propagation model
  • 30 dB fade margin
  • 3.5MHz channels
  • NLOS conditions

Modulation
18 Mb/s
16 Mb/s
13 Mb/s
8 Mb/s
6 Mb/s
4 Mb/s
3 Mb/s
2 Mb/s
Capasity
10
Benefits challenges
  • Benefits
  • Pay as you grow cost effective BST design
  • Applies for Macro and Micro BST
  • Fits rural market that requires high coverage
    with moderate capacity
  • No bindings to poor copper lines in countryside
  • Available to all target groups
  • Households
  • Summer houses / cottages
  • Companies
  • Challenges
  • Poor weather conditions (rain, snow, fog…)
  • Difficult geographic conditions (hills,
    woods/trees, lakes…)
  • Price development for terminals Will prices go
    down due to competition?
  • Shortage of free frequencies in large city areas
About PowerShow.com