Overview of WiMAX Achieving Wireless Broadband with WiMax Steven J. Vaughan-Nichols June 2004, IEEE Computer Society

1
Overview of WiMAXAchieving Wireless Broadband
with WiMax Steven J. Vaughan-NicholsJune 2004,
IEEE Computer Society

• Graduate of Dept. of IM
• R94725048
• ???(Wendy)

2
Agenda

• Part 0 Wireless Technology
• Part 1 WiMAX Introduction
• Introduction
• Characteristic
• Extension of IEEE 802.16
• Vision
• Challenge
• Discussion
• Part 2 The Latest News about WiMAX

3
Part 0Wireless Technology
4
802.15 (Bluetooth) 802.11 (Wi-Fi) 3G (WCDMA) 802.16 (WiMAX)
Geo Size wPAN wLAN wWAN wMAN
Spectrum 2.4 GHz 2.4 GHz 2 GHz 2 - 66 GHz
Bit rate 720 kbps b-11 Mbps g-54 Mbps 115 Kbps 75 Mbps
Transmit range 10 m (up to 8 devices) 100 m 1 km 50 km
Cost 4 3 1 2
Power 4 3 1 2
5
Part OneWiMAX Introduction
6
Why needs WiMax?
Introduction

• Network service providers are unwilling to deploy
  necessary equipment in rural areas and developing
  countries that have little potential profit.
• Wired infrastructures can be more expensive and
  time consuming to deploy than wireless ones.

Characteristic
Extension
Vision
Challenge
Discussion
7
Purpose of WiMAX

• WiMax will provide high-speed network connections
  and thereby serve as a backbone for IEEE 802.11
  wireless LAN hot spots, where roaming mobile
  users can access carriers WiFi services.
• The fixed WiMAX, providing last-mile broadband
  wireless access, is called third pipe.
• The mobile WiMAX, to be provided with packet
  transmission, is regarded as a competitor of 3G.

Introduction
Characteristic
Extension
Vision
Challenge
Discussion
8
What is WiMAX?
Introduction

• Worldwide Interoperability for Microwave Access
  (?????????)
• WiMax is the commercialization of the maturing
  IEEE 802.16 standard, which specifies the
  radio-frequency technology for wireless MAN.

Characteristic
Extension
Vision
Challenge
Discussion
9
WiMAX Forum
Introduction

• A wireless industry consortium with about 100
  members, including such major vendors as ATT,
  Fujitsu, Intel, and Siemens Mobile, is supporting
  WiMax technology and promoting its commercial
  use.
• The forum is preparing profiles for systems that
  comply with WiMax specifications and creating
  interoperability tests to make sure different
  vendors implementations work together.

Characteristic
Extension
Vision
Challenge
Discussion
10
WiMAX Forum (cont)
Introduction

• The business model of WiMAX Forum acts like Wi-Fi
  Alliance.

Characteristic
Extension
Vision
Challenge
Discussion
11
ETSI
Introduction

• European Telecommunications Standards Institute
• HiperACCESS frequencies above 11GHz
• HiperMAN frequencies below 11GHz
• HiperMAN, high-performance radio MAN broadband
  standard, has evolved over a protracted
  standardizing process to be a subset of 802.16
  and is supported by WMAX, thereby allowing
  interoperability across US and Europe.

Characteristic
Extension
Vision
Challenge
Discussion
12
Introduction of IEEE Standards 802.16TM
This standard specifies the air interface of
fixed broadband wireless access (BWA) systems
supporting multimedia services. The medium access
control layer (MAC) supports a primarily
point-to-multipoint architecture, with an
optional mesh topology. The MAC is structured to
support multiple physical layer (PHY)
specifications, each suited to a particular
operational environment. For operational
frequencies from 1066 GHz, the WirelessMAN-SC
PHY, based on single-carrier modulation, is
specified. For frequencies below 11 GHz, where
propagation without a direct line of sight must
be accommodated, three alternatives are provided
WirelessMAN-OFDM, WirelessMAN-OFDMA, and
WirelessMAN-SCa. This standards revises and
consolidates IEEE Standards 802.16-2001,
802.16a-2003, and 802.16c-2002.
13
Support transport tech. IPv4, IPv6, Ethernet, ATM
Transmission range up to 31 miles
Data transmission up to 75 Mbps (per 20MHz-channel)
Frequency range 2 to 66 GHz
Mo/DeM technology OFDM
Security mechanism public-key-infrastructure authentication 56-bit DES keys encryption
Introduction
Characteristic
Extension
Vision
Challenge
Discussion
14
IEEE 802.16 Extensions
802.16 Launched in Dec., 2001 Representing a 10 to 66 GHz Transmission range up to around 50 km Data transmission 300Kbps to 2Mbps Focusing on the condition of fixed, PMP, and LOS
802.16 a Launched in Jan., 2003 Used in licensed and license-exempt frequencies from 2 to 11 GHz The signals can penetrate barriers and thus do not require a line of sight between transceiver and antenna. (Non Line-Of-Sihgt) Transmission range up to around 9 km Focusing on to be the technology of last mile and consolidating 802.16 Supporting mesh deployment
Introduction
Characteristic
Extension
Vision
Challenge
Discussion
15
IEEE 802.16 Extensions (cont)
802.16 b Used in the 5 to 6 GHz license-exempt frequency bands, especially in the 5.8 GHz Called WirelessHUMAN (Wireless High-speed Unlicensed MA) Providing QoS to ensure priority transmission
802.16 c Representing a 10 to 66 GHz Consolidating the version of 802.16
802.16 d Creating system profiles for compliance testing of 802.16a devices
802.16 e Standardizing network between carriers fixed base stations and mobile devices Used in NB, PDA, mobile phone Expected data transmission rate 120 km
Introduction
Characteristic
Extension
Vision
Challenge
Discussion
16
802.16 vs WiMAX
Introduction
Characteristic
Extension
Vision
Challenge
Discussion
17
(No Transcript)
18
Make Ubiquitous Computing Come True
Introduction

• 1st step connecting with CPE outside door.
• 2nd step connecting with CPE inside door.
• 3rd step connecting with mobile devices, such as
  NB, then BS will link to backbone of Internet by
  remote backhaul.

Characteristic
Extension
Vision
Challenge
Discussion
19
Challenge

• Some critics argue that much of the radio
  spectrum needed to deploy WiMax has already
  either been distributed by governments or
  dedicated for other purposes by carriers.
• The cost of deploying wireless technology is
  considerably more when the service is offered at
  higher radio frequencies because the
  line-of-sight requirements necessitate the
  installation of additional antennas to cover the
  same service area.
• WiMax, particularly the mobile version, may face
  serious competition from IEEE 802.20 mobile
  broadband technology, which targets high-speed,
  wireless, IP-based connectivity to devices such
  as cellular phones, PDAs, and laptops. The
  technology will operate in the 500 MHz to 3.5 GHz
  range.

Introduction
Characteristic
Extension
Vision
Challenge
Discussion
20
Discussion
Introduction

• Is WiMAX equal to IEEE 802.16?
• Will IEEE 802.20 be the extension of WiMAX?
• Will WiMAX substitute for Wi-Fi?
• Will WiMAX be the 3G-Killer?

Characteristic
Extension
Vision
Challenge
Discussion
21
Part 2 The Latest News out WiMAX
22
???? 2004/12/13
23
???? 2005/4/19
24
Intel PRO /Wireless 5116
25
??????WiMAX???
26
???? 2005/10/17
27
???? 2005/11/12
28
???? 2005/11/15
29
Reference

• IEEE Standards 802.16TM
• WiMAX in-depth Broadband wireless access.pdf
• http//www.edntaiwan.com/article.asp?id151
• http//www.techvantage.com.tw/content/056/056054.a
  sp
• http//www.dgt.gov.tw/chinese/Public-comments/15.2
  /pc-094/WiMAX.pdf
• http//taiwan.cnet.com/enterprise/technology/0,200
  0062852,20100557,00.htm
• http//www.dgt.gov.tw/chinese/Public-comments/15.2
  /pc-094/WiMAX.pdf
• http//taiwan.cnet.com
• http//udn.com/NEWS/INFOTECH/INF3/1736584.shtml
• http//www.find.org.tw/0105/news/0105_news_disp.as
  px?news_id4010
• http//tw.news.yahoo.com/051112/15/2iu1p.html
• http//www5.chinesenewsnet.com/MainNews/SocDigest/
  Economy/cna_2005_10_17_03_00_06_281.html
• http//www.poweruser.com.tw/news_content.php?N_ID
  237
• http//taiwan.cnet.com/news/comms/0,2000062978,200
  94915,00.htm
• http//www.eedesign.com.tw/article/document/dc1074
  .htm

30
Thank you for your attention.