seminar final.doc
TRANSCRIPT
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A
Seminar Report
On
WIMAX TECHNOLOGY
Presented By
ABHISHE MEHRA
Ro!! No" #$
%nder t&e '(idan)e o*
Pro*" +I,YA R" -OSHI
,epartment O* Comp(ter En'ineerin' . I"T"
B&arati +idyapeet& ,eemed %ni/ersity Co!!e'e O* En'ineerin'
P(ne01$
#2230#224
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BHARATI VIDYAPEETH DEEMED UNIVERSITYCOLLEGE OF ENGINEERING
KATRAJ DHANKAWADI 411043
This is ! "#$i%& h' ABHISHE MEHRA( !% ")'ss B*T#"h* I*T*( R!)) N!*+3( h's
s,""#ss%,))& "!-.)##/ his s#-i'$ !$2 ! h# !.i" WIMA TECHNOLOGY ,/#$ h#
')# 5,i/'"# !% Pro*"+I,YA R" -OSHI( !'$/s h# .'$i') %,)%i))-# !% h# #$-!$2 i h# s,6#" !% Seminar and Te)&ni)a! Comm(ni)ation( i h# '"'/#-i" '$ !%
+0078+009*
Pro*" S%HAS H" PATIL Pro*" +I,YA R" -OSHI
:H*O*D*; :G,i/#;
D'#
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A)5no6!ed'ements
I( ABHISHE MEHRA7 !,)/ )i2# ! '2# his !..!$,i& !
#=.$#ss -& si"#$#s 5$'i,/# ! ')) h# .#!.)# h! h'># "!$i,#/ !'$/s h#
s,""#ss%,) "!-.)#i! !% -& s#-i'$*
I !,)/ )i2# ! #=#/ -& h#'$%#) h'2s ! -& H*O*D Pro*" S%HAS
H"PATIL '/ -& S#-i'$ G,i/# Pro* .VIDYA R. JOSHI %!$ h# i>'),')# s,..!$
'/ 5,i/'"# #=#/#/ ! ,s & h#-( %!$ ,$,$i5 ' "!5#i') "!-.#ii>#
#>i$!-# i h# /#.'$-#( hi"h -!i>'#s ')) h# s,/#s ! .,$s,# hi5h#$ 5!')s*
I !,)/ ')s! )i2# ! #=#/ -& h'2s ! ')) h# #'"hi5 '/ ! #'"hi5
s'%% -#-#$s !% -& D#.'$-#( '/ ! ')) -& "!))#'5,#s h! h#).#/ -# i h# #i$#
s#-i'$ .$#.'$'i!*
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IN,EX
TOPIC PAGENO
1* INTRODUCTION 1
+* WHAT IS WIMA +
3* HOW WIMA WORKS 7
4* WIMA?S TECHNOLOGY FOR LOS AND NLOS ENVIRONMENTS @
7* ORTHOGONAL FREUENCY DIVISION MULTIPLEING 11
9* DEPLOYMENT TOPOLOGIES 13
* WIMA FORUM 14
@* MARKET FOR WIMA 1
* WIMA AND TECHNOLOGY CHALLENGE ++
10* WIMA AND EISTING TECHNOLOGY +7
11* PROGRESS ON WIMA STANDARD +@
1+* INTEL?S ROLE IN WIMA 30
13* WIMA SPECTRUM AND REGULATION ISSUES 3+
14* WHAT LIES AHEAD 33
17* CONCLUSION 3419* REFERENCES 3@
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8" INTRO,%CTION
B$!'/'/ Wi$#)#ss A""#ss :BWA; h's ## s#$>i5 ##$.$is#s '/ !.#$'!$s
%!$ '$s( ! h# 5$#' s'is%'"i! !% is ,s#$s* H!#>#$( h# # IP's#/ s'/'$/
/#>#)!.#/ & h# IEEE @0+*19 is )i2#)& ! '""#)#$'# '/!.i! !% h# #"h!)!5&* I i))
#=.'/ h# s"!.# !% ,s'5# h'2s !< h# .!ssii)i& !% !.#$'i5 i )i"#s#/ '/
,)i"#s#/ %$#,#"& '/s( ,i,# .#$%!$-'"# ,/#$ N!Li#!%Si5h :NLOS;
"!/ii!s( ,')i& !% S#$>i"# :!S; ''$##ss( #=#si! ! !-'/i"i&( '/ -!$#*
I .'$'))#)( h# WiMA %!$,-( '"2#/ & i/,s$& )#'/#$s( i)) #"!,$'5# h#
i/#s.$#'/ '/!.i! !% $!'/'/ i$#)#ss '""#ss & #s')ishi5 ' $'/ %!$ h#
#"h!)!5& '/ .,shi5 i#$!.#$'i)i& ### .$!/,"s*
T&e p(rpose o* t&is report is to &i'&!i'&t and assess t&e /a!(e o* WiMAX as t&e
ri'&t so!(tion to9
1* E=#/ h# ",$$#)& )i-i#/ "!>#$'5# !% .,)i" WLAN :h!s.!s; ! "i&i/# "!>#$'5#
:h! !#s;
+* Th# s'-# #"h!)!5& #i5 ,s')# ' h!-# '/ ! h# -!>#(
3* B)'2# -#$!.!)i' '$#'s %!$ -!i)# /''"#$i" s#$>i"# /#)i>#$&( !%%#$ %i=#/
$!'/'/ '""#ss i ,$' '/ s,,$' '$#'s h#$# "!..#$ ,')i& is .!!$ !$ ,,/)i5 /i%%i",)(
4* B$i/5# h# /i5i') /i>i/# i )!/#si& '$#'s h#$# #"hi"') '/ #"!!-i" %'"!$s
-'2# $!'/'/ /#.)!&-# >#$& "h'))#5i5*
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#"WHAT IS WIMAX:
#"2 Standards asso)iated to WiMAX9
W!$)/i/# I#$!.#$'i)i& %!$ Mi"$!'># A""#ss :WiMA; is h#
"!--! '-# 'ss!"i'#/ ! h# IEEE @0+*19'REV/# s'/'$/s* Th#s# s'/'$/s '$#
iss,#/ & h# IEEE @0+*19 s,5$!,. h' !$i5i'))& "!>#$#/ h# Wi$#)#ss L!"') L!!.
:WLL; #"h!)!5i#s ih $'/i! s.#"$,- %$!- 10 ! 99 GH* R#"#)&( h#s#
s.#"i%i"'i!s
#$# #=#/#/ #)! 10 GH*
1* I J','$& +003( h# IEEE '..$!>#/ @0+*19' 's ' '-#/-# ! IEEE @0+*19 +001(
/#%ii5 :N#'$; Li#O% Si5h "'.'i)i&*
+* I J,)& +004( IEEE @0+*19REV/( ! .,)ish#/ ,/#$ h# '-# IEEE @0+*19+004(
i$!/,"#s s,..!$ %!$ i/!!$ CPE :NLOS; h$!,5h '//ii!') $'/i! "'.'i)ii#s s,"h
's '#' #'- %!$-i5 '/ OFDM s,"h'#)i5*
3* E'$)& +007( ' IEEE @0+*19# >'$i' i)) i$!/,"# s,..!$ %!$ -!i)i&* S## Fi5,$# 1
%!$ h# '..)i"'i!s 'ss!"i'#/ ih #'"h !% h#s# s'/'$/s* Th# WiMA F!$,- i#/s
! /! %!$ @0+*19 h' h# WiFi A))i'"# /i/ %!$ @0+*11<
4* H'$-!i# s'/'$/s '/ "#$i%& i#$!.#$'i)i& ### #,i.-# %$!- /i%%#$#>#/!$s* S'/'$/i#/ i#$!.#$')# s!),i!s i)) $#s,) i -'ss >!),-# '/ $i5 /!
"!ss(
7* P$!-!# '/ #s')ish ' $'/ %!$ h# #"h!)!5&*
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Thi2 '!, h! &!, '""#ss h# I#$# !/'&* Th#$# '$# 'si"'))& h$## /i%%#$#
!.i!s<
1* B$!'/'/ '""#ss I &!,$ h!-#( &!, h'># #ih#$ ' DSL !$ "')# -!/#-* A
h# !%%i"#( &!,$ "!-.'& -'& # ,si5 ' T1 !$ ' T3 )i#*
+* WiFi '""#ss I &!,$ h!-#( &!, -'& h'># s# ,. ' WiFi $!,#$ h' )#s &!,s,$% h# W# hi)# &!, )!,5# ih &!,$ )'.!.* O h# $!'/( &!, "' %i/ WiFi
h! s.!s i $#s',$'s( h!#)s( "!%%## sh!.s '/ )i$'$i#s*
3* Di'),. '""#ss I% &!, '$# si)) ,si5 /i'),.( "h'"#s '$# h' #ih#$ $!'/'/
'""#ss is ! '>'i)')#( !$ &!, hi2 h' $!'/'/ '""#ss is !! #=.#si>#*
Th# -'i .$!)#-s ih $!'/'/ '""#ss '$# h' i is .$#& #=.#si># '/ i /!#s
$#'"h ')) '$#'s* Th# -'i .$!)#- ih WiFi '""#ss is h' h! s.!s '$# >#$& s-'))( s!
"!>#$'5# is s.'$s#*
WiMA h's h# .!#i') ! /! ! $!'/'/ I#$# '""#ss h' "#))
.h!#sh'># /!# ! .h!# '""#ss* I h# s'-# '& h' -'& .#!.)# h'># 5i># ,. h#i$
)'/ )i#s i %'>!$ !% "#)) .h!#s( WiMA "!,)/ $#.)'"# "')# '/ DSL
$>i"#s(.$!>i/i5 ,i>#$s') I#$# '""#ss 6,s '!, '&h#$# &!, 5!* WiMA i)) ')s!
# 's .'i)#ss 's WiFi ,$i5 &!,$ "!-.,#$ ! i)) ',!-'i"'))& "!#" &!, ! h#
")!s#s '> This #"h!)!5& .$!>i/#:
• Th# hi5h s.##/ !% $!'/'/ s#$>i"#
• Wi$#)#ss $'h#$ h' i$#/ '""#ss( s! i !,)/ # ' )! )#ss #=.#si># h' "')# !$
DSL '/ -,"h #'si#$ ! #=#/ ! s,,$' '/ $,$') '$#'s
• B$!'/ "!>#$'5# )i2# h# "#)) .h!# #!$2 is#'/ !% s-')) WiFi h!s.!s *
#"8 WiMAX7 t&e rea!ity ;eyond t&e &ype
As -#i!#/ '!>#( WiMA "' !%%#$ >#$& hi5h /'' $'#s '/ #=#/#/ "!>#$'5#*
H!#>#$(
1* 7 Mis "'.'"i& %!$ h# 's# s'i! is '"hi#>')# ih ' +0 MH "h'#) i
#s.$!.'5'i! "!/ii!s* B, $#5,)'!$s i)) !%# '))! !)& s-'))#$ "h'#)s :10
-h!$ )#ss; $#/,"i5 h# -'=i-,- '/i/h*
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+* E># h!,5h 70 2- is '"hi#>')# ,/#$ !.i-') "!/ii!s '/ ih ' $#/,"#/ /''
$'# :' %# Mis;( h# &.i"') "!>#$'5# i)) # '$!,/ 7 2- ih i/!!$ CPE :NLOS;
'/ '$!,/ 17 2- ih ' CPE "!#"#/ ! ' #=#$') '#'
$" HOW WIMAX WORS:
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I .$'"i"') #$-s( WiMA !,)/ !.#$'# si-i)'$ !
WiFi , ' hi5h#$ s.##/s( !>#$ 5$#'#$ /is'"#s '/ %!$ ' 5$#'#$ ,-#$ !% ,s#$s*
WiMA "!,)/ .!#i'))& #$'s# h# s,,$' '/ $,$') )'"2!, '$#'s h' ",$$#)& h'>#
! $!'/'/ I#$# '""#ss #"',s# .h!# '/ "')# "!-.'i#s h'># ! $, h#
#"#ss'$& i$#s ! h!s# $#-!# )!"'i!s*
A WiMA s&s#- "!siss !% ! .'$s<
• A WiMAX to6er( si-i)'$ i "!"#. ! ' "#)).h!# !#$ A si5)# WiMA
!#$ "' .$!>i/# "!>#$'5# ! ' >#$& )'$5# '$#' 's i5 's 3(000 s,'$# -i)#s
:@(000 s,'$# 2-;*
• A WiMAX re)ei/er Th# $#"#i>#$ '/ '#' "!,)/ # ' s-')) != !$ PCMCIA
"'$/( !$ h#& "!,)/ # ,i) i! ' )'.!. h# '& WiFi '""#ss is !/'&*
A WiMA !#$ s'i! "' "!#" /i$#")& ! h# I#$# ,si5 ' hi5h'/i/h(
i$#/ "!#"i! :%!$ #='-.)#( ' T3 )i#;* I "' ')s! "!#" ! '!h#$ WiMA !#$
,si5 ' )i#!%si5h( -i"$!'># )i2* This "!#"i! ! ' s#"!/ !#$ :!%# $#%#$$#/
! 's ' ;a)5&a(!;( ')!5 ih h# 'i)i& !% ' si5)# !#$ ! "!>#$ ,. ! 3(000 s,'$#
-i)#s( is h' '))!s WiMA ! .$!>i/# "!>#$'5# ! $#-!# $,$') '$#'s*
Photo courtesy Intel
WiMAX transmitting tower
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Wh' his .!is !, is h' WiMA '",'))& "' .$!>i/# ! %!$-s !% i$#)#ss s#$>i"#<
• Th#$# is h# non0!ine0o*0si'&t( WiFi s!$ !% s#$>i"#( h#$# ' s-')) '#' !
&!,$ "!-.,#$ "!#"s ! h# !#$* I his -!/#( WiMA ,s#s ' !o6er
*re#$'5#( hi"h is si-i)'$ i $'5# ! ' "#)).h!# !#;* Th$!,5h h#
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s$!5#$ )i#!%si5h '#'s( h# WiMA $'s-ii5 s'i! !,)/ s#/ /'' !
WiMA#')#/ "!-.,#$s !$ $!,#$s s# ,. ihi h# $'s-i#$s 30-i)# $'/i,s
:3(900 s,'$# -i)#s !$ (300 s,'$# 2- !% "!>#$'5#;* This is h' '))!s WiMA !
'"hi#># is -'=i-,- $'5#*
1" WIMAX=S TECHNOLOGY >OR LOS AN, NLOS
EN+IRONMENTS
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1"2"A;stra)t
Whi)# -'& #"h!)!5i#s ",$$#)& '>'i)')# %!$ %i=#/ $!'/'/ i$#)#ss "' !)&
.$!>i/# )i# !% si5h :LOS; "!>#$'5#( h# #"h!)!5& #hi/ WiMA h's ## !.i-i#/
! .$!>i/# #="#))# ! )i# !% si5h :NLOS; "!>#$'5#* WiMA?s '/>'"#/ #"h!)!5&
.$!>i/#s h# #s !% !h !$)/s 8 )'$5# "!>#$'5# /is'"#s !% ,. ! 70 2i)!-##$s ,/#$
LOS "!/ii!s '/ &.i"') "#)) $'/ii !% ,. ! 7 -i)#s@ 2- ,/#$ NLOS "!/ii!s*
1"8"NLOS /ers(s LOS Propa'ation
Th# $'/i! "h'#) !% ' i$#)#ss "!--,i"'i! s&s#- is !%# /#s"$i#/ 's #i5 #ih#$
LOS !$ NLOS* I ' LOS )i2( ' si5') $'>#)s !>#$ ' /i$#" '/ ,!s$,"#/ .'h %$!-
h# $'s-i#$ ! h# $#"#i>#$* A LOS )i2 $#,i$#s h' -!s !% h# %i$s F$#s#) !# is
%$## !% '& !s$,"i!( s## Fi5,$# 1 i% his "$i#$i' is ! -# h# h#$# is ' si5i%i"'
$#/,"i! i si5') s$#5h( s## R#% 1*
Th# F$#s#) ")#'$'"# $#,i$#/ /#.#/s ! h# !.#$'i5 %$#,#"& '/ h# /is'"#
### h# $'s-i#$ '/ $#"#i>#$ )!"'i!s*
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I ' NLOS )i2( ' si5') $#'"h#s h# $#"#i>#$ h$!,5h $#%)#"i!s( s"'#$i5( '/
/i%%$'"i!s* Th# si5')s '$$i>i5 ' h# $#"#i>#$ "!siss !% "!-.!#s %$!- h# /i$#"
.'h( -,)i.)# $#%)#"#/ .'hs( s"'#$#/ ##$5&( '/ /i%%$'"#/ .$!.'5'i! .'hs* Th#s#
si5')s h'># /i%%#$# /#)'& s.$#'/s( '#,'i!( .!)'$i'i!s( '/ s'i)i& $#)'i># !
h# /i$#" .'h*
Th# -,)i .'h .h#!-#' "' ')s! "',s# h# .!)'$i'i! !% h# si5') ! # "h'5#/*
Th,s ,si5 .!)'$i'i! 's ' -#'s !% %$#,#"& $#,s#( 's is !$-'))& /!# i LOS/#.)!&-#s "' # .$!)#-'i" i NLOS '..)i"'i!s*
H! ' $'/i! s&s#- ,s#s h#s# -,)i .'h si5')s ! ' '/>''5# is h# 2#& ! .$!>i/i5
s#$>i"# i NLOS "!/ii!s* A .$!/," h' -#$#)& i"$#'s#s .!#$ ! .##$'#
!s$,"i!s :s!-#i-#s "'))#/ #'$ )i# !% si5h; is ! NLOS #"h!)!5& #"',s# his
'..$!'"h si)) $#)i#s ! ' s$!5 /i$#" .'h ih!, ,si5 ##$5& .$#s# i h# i/i$#"
si5')s* B!h LOS '/ NLOS "!>#$'5# "!/ii!s '$# 5!>#$#/ & h# .$!.'5'i!
"h'$'"#$isi"s !% h#i$ #>i$!-#( .'h )!ss( '/ $'/i! )i2 ,/5#*
Th#$# '$# s#>#$') '/>''5#s h' -'2# NLOS /#.)!&-#s /#si$')#* F!$ is'"#( s$i"
.)'i5 $#,i$#-#s '/ '#' h#i5h $#s$i"i!s !%# /! ! '))! h# '#' !
# .!sii!#/ %!$ LOS* F!$ )'$5#s"')# "!i5,!,s "#)),)'$ /#.)!&-#s( h#$# %$#,#"&
$#,s# is "$ii"')( )!#$i5 h# '#' is '/>''5#!,s ! $#/,"# h# "! "h'#)
i#$%#$#"# ### '/6'"# "#)) si#s* This !%# %!$"#s h# 's# s'i!s ! !.#$'# i
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NLOS "!/ii!s* LOS s&s#-s "'! $#/,"# '#' h#i5hs #"',s# /!i5 s! !,)/
i-.'" h# $#,i$#/ /i$#" >i# .'h %$!- h# CPE ! h# B's# S'i!*
NLOS #"h!)!5& ')s! $#/,"#s is'))'i! #=.#s#s & -'2i5 ,/#$h##'>#s CPE
is'))'i! ' $#')i& '/ #'si5 h# /i%%i",)& !% )!"'i5 '/#,'# CPE -!,i5
)!"'i!s* Th# #"h!)!5& ')s! $#/,"#s h# ##/ %!$ .$# is'))'i! si# s,$>#&s '/
i-.$!>#s h# '"",$'"& !% NLOS .)'i5 !!)s*
1"#" NLOS Te)&no!o'y So!(tions
WiMA #"h!)!5&( s!)>#s !$ -ii5'#s h# .$!)#-s $#s,)i5 %$!- NLOS "!/ii!s
& ,si5<
OFDM #"h!)!5&*
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3" Ort&o'ona! >re'i)')#* OFDM #%%#"i>#)&
s,###s
-,)i.)# -!/,)'#/ "'$$i#$s i5h)& !5#h#$( $#/,"i5 h# $#,i$#/ '/i/h , 2##.i5
h# -!/,)'#/ si5')s !$h!5!') s! h#& /! ! i#$%#$# ih #'"h !h#$* T!/'&( h#
#"h!)!5& is ,s#/ i s,"h s&s#-s 's 's&--#$i" /i5i') s,s"$i#$ )i# :ADSL; 's #))
's i$#)#ss s&s#-s s,"h 's IEEE @0+*11'5 :WiFi; '/ IEEE @0+*19 :WiMA;* I is
')s! ,s#/ %!$ i$#)#ss /i5i') ',/i! '/ >i/#! $!'/"'si5* I is 's#/ ! %$#,#"&
/i>isi! -,)i.)#=i5 :FDM;( hi"h is ' #"h!)!5& h' ,s#s -,)i.)# %$#,#"i#s !
si-,)'#!,s)& $'s-i -,)i.)# si5')s i .'$'))#)* E'"h si5') h's is ! %$#,#"&
$'5# :s,"'$$i#$; hi"h is h# -!/,)'#/ & /''* E'"h s,"'$$i#$ is s#.'$'#/ & '
5,'$/ '/ ! #s,$# h' h#& /! ! !>#$)'.* Th#s# s,"'$$i#$s '$# h# /#-!/,)'#/ '
h# $#"#i>#$ & ,si5 %i)#$s ! s#.'$'# h# '/s*
OFDM is si-i)'$ ! FDM , -,"h -!$# s.#"$'))& #%%i"i# & s.'"i5 h# s,"h'#)s
-,"h ")!s#$ !5#h#$ :,i) h#& '$# '",'))& !>#$)'..i5;* This is /!# & %i/i5
%$#,#"i#s h' '$# !$h!5!')( hi"h -#'s h' h#& '$# .#$.#/i",)'$ i '-'h#-'i"') s#s#( '))!i5 h# s.#"$,- !% #'"h s,"h'#) ! !>#$)'. '!h#$
ih!, i#$%#$i5 ih i*
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I Fi5,$# ( h# #%%#" !% his is s## 's h# $#,i$#/ '/i/h is 5$#')& $#/,"#/ &
$#-!>i5 5,'$/ '/s '/ '))!i5 si5')s ! !>#$)'.* I !$/#$ ! /#-!/,)'# h# si5')(
' /is"$## F!,$i#$ $'s%!$- :DFT; is ##/#/* F's F!,$i#$ $'s%!$- :FFT; "hi.s '$#
"!--#$"i'))& '>'i)')#( -'2i5 his ' $#)'i>#)& #'s& !.#$'i! .h's# shi% 2#&i5 :PSK;
!$ ,'/$',$# '-.)i,/# -!/,)'i! :AM; is &.i"'))& #-.)!/ ! i"$#'s# h# /''
h$!,5h.,* S! i his "'s#( ' /'' s$#'- !,)/ # s.)i i! n :1+; .'$'))#) /''
s$#'-s( #'"h ' 1n :11+; !% h# !$i5i') $'#*
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4" ,EPLOYMENT TOPOLOGIES
I #-#$5i5 "!,$i#s( h# -'i %!",s !% $!'/'/ /#.)!&-# is ! ,$'
'/ s,,$' '$#'s( '/ i)) $#-'i s! i h# #'$ %,,$#* Th# )! POTS .##$'i! '/h# )! ,')i& !% h# "!..#$ .'i$ .$#># -'ss s"')# DSL /#.)!&-# '/ %!s#$ h# ##/
%!$ ')#$'# $!'/'/ #"h!)!5i#s* I his "!#=( WiMA is .!sii!#/ 's '
#="#))# !.i!* M!$#!>#$( h# .!ssii)i& !% !%%#$i5 $!'/'/ s#$>i"#s i "!-i'i!
ih >!i"# s#$>i"#s i)) 5$'/,'))& )#'/ ! '$$!'/ WLL s,si,i!* P'$'-##$s s,"h
's '>'i)'i)i& !% h# "!..#$( /is'"# ! h# $#-!# ,i"#$') !%%i"#( '"2h',)i5 "!ss(
'/ #)#/#si& i)) /$i># h# "h!i"# %!$ !# !$ !h#$ !% h#s# s!),i!s* WiM'= is !%
i#$#s %!$ )'$5# ##$.$is#s ih s#>#$') )!"'i!s i h# s'-# -#$!.!)i' '$#'* WiM'=
i)) .#$-i O.#$'!$s &.'ss ,/#$ )i"#s# "!/ii!s< ,i)/i5 ' -#$!.!)i' .$i>'#
#!$2 !% IP )i#s ' ' >#$& )! "!s :! "i>i) !$2s;* Th# "!-.'$is! ! )#'s#/ )i#s
$#') %## is i %'>!$ !% Wi-'= #># %!$ ! si#s !)&*
S#>#$') !.!)!5& '/ '"2h',)i5 !.i!s '$# ! # s,..!$#/ ! h# WiMA 's#
s'i!s< i$#)i# '"2h',)i5 :&.i"'))& !>#$ Eh#$#;( -i"$!'># P!i!P!i
"!#"i!( 's #)) 's WiMA '"2h',)* Wih h# )'#$ !.i!( h# 's# s'i! h's h#
"'.'i)i& ! '"2h',) is#)%* This "' # '"hi#>#/ & $#s#$>i5 .'$ !% h# '/i/h
!$-'))& ,s#/ %!$ h# #/,s#$ $'%%i" '/ ,si5 i %!$ '"2h',)i5 .,$.!s#s*
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@" WIMAX >OR%M
Th# WiMA F!$,- is ' !.$!%i "!$.!$'i! %!$-#/ ! h#). .$!-!# '/
"#$i%& h# "!-.'ii)i& '/ i#$!.#$'i)i& !% BWA :B$!'/'/ Wi$#)#ss A""#ss;
#,i.-#* Th# si5)# 5)!') i#$!.#$')# s'/'$/ %!$ $!'/'/ i$#)#ss '""#ss is
's#/ ! WiLANs WOFDM #"h!)!5& '/ h# IEEE @0+*19 ETSI Hi.#$MAN
s'/'$/s* Th# F!$,-s #%%!$s '$# i#/#/ ! h#). '""#)#$'# h# i$!/,"i! !%
s'/'$/s's#/ $!'/'/ i$#)#ss #,i.-# i! h# -'$2#.)'"#( s.##/i5 ,. )'s
-i)# $!'/'/ /#.)!&-# !$)/i/#*
WiMA F!$,- C#$i%i#/ #,i.-# is #=.#"#/ ! .$!>i/# ,. ! 702i)!-##$s !% $'5#
'/ '))! ,s#$s ! $#"#i># $!'/'/ "!#"i>i& ih!, $#,i$i5 ' /i$#" )i# !% si5h
ih h# 's# s'i!* Th# #,i.-# is ')s! #=.#"#/ ! .$!>i/# sh'$#/ /'' $'#s ,. !
0 M.s( hi"h is #!,5h '/i/h ! si-,)'#!,s)& s,..!$ -!$# h' 90 ,si#ss#s
ih T1&.# "!#"i>i& '/ h,/$#/s !% h!-#s ih DSL&.# "!#"i>i& ih '
si5)# 's# s'i!*
WiMA B##%is<
1*N#!$2 !.#$'!$s #,i.-# i#$!.#$'i)i& '"$!ss >#/!$s Q )!#$ "!s )!#$
$is2 %i)) $!'/'/ '""#ss 5'.s %!$ $#si/#i') '/ ,si#ss
+*E/,s#$s %'s#$ '/ "h#'.#$ '""#ss h' is -!$# i/#)& '>'i)')# -!$# "h!i"# %!$
$!'/'/ '""#ss
3*C!-.!# -'2#$s "$#'#s >!),-# !..!$,i& %!$ si)i"! s,..)i#$s %##$
.$!/," >'$i'i!s '/ hi5h#$ >!),-#s
4*E,i.-# -'2#$s "' i!>'# -!$# $'.i/)&
WiLAN '/ WiMAAs ' %!,/i5 -#-#$ !% h# F!$,-( WiLAN h's .)'/ ' "$ii"')
$!)# i h# /#>#)!.-# !% h# s'/'$/ & )#'/i5 h# #"hi"') !$2i5 5$!,. !%
WiMA F!$,- '/ IEEE @0+*19 T's2 G$!,. /* WiLAN is ')s! ' !'$/ -#-#$ !%
WiMA F!$,-*
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WiLAN h's '!,"#/ is .)' ! .$!/,"# ' WiMA F!$,- C#$i%i#/ s&s#- i
"!6,"i! ih F,6is, Mi"$!#)#"$!i"s A-#$i"'* A>'i)'i)i& !% #5i##$i5 s'-.)#s
!% h# WiLANF,6is, S&s#-!Chi. :S!C; '$# .)'#/ %!$ h# %')) !% +004( '/ h#
"!-.)## s&s#- is #=.#"#/ ! # '>'i)')# %!$ WiMA F!$,- "!%!$-'"# '/
i#$!.#$'i)i& #si5 & h# #/ !% +007*
F,6is, '/ WiLAN WiMA S&s#-!Chi. :S!C;
F,6is, '/ WiLAN h'># ## !$2i5 ")!s#)& ! WiMA #"h!)!5& si"# )'# +00+*
WiLAN h's "!-i#/ is s&s#- #=.#$is# '/ O$h!5!') F$#,#"& Di>isi!
M,)i.)#=i5 :OFDM; #"h!)!5& ih FMA?s "hi. /#si5 "'.'i)ii#s i ' /#>#)!.-#
.$!5$'- h' "$#'#/ ' # S!C %$!- F,6is,* Th# hi5h)& i#5$'#/( hi5h.#$%!$-'"#
s!),i! i"!$.!$'#s #-#//#/ .$!"#ss!$s '/ -i=#/ si5') #"h!)!5& i ' /#>i"# h'
i)) #')# s&s#-s /#>#)!.#$s )i2# WiLAN ! .$!>i/# "!s#%%#"i># WiMA F!$,-
C#$i%i#/ #,i.-#*
Li$' M
WiLAN?s Li$' M( h# !$)/?s %i$s %!,$h5##$'i! OFDM $!'/'/ i$#)#ss
.$!/,"( 5i>#s WiMA .#$%!$-'"# !/'&( '/ 5,'$'##/ -i5$'i! ! WiMA
"#$i%i#/ s&s#-s h# h#& #"!-# '>'i)')#* I '))!s "'$$i#$s ! ,i)/ ' %!,/'i! %!$
WiMA !( '/ '"hi#># $'.i/ ROI & /#)i>#$i5 '/>'"#/ s#$>i"#s )i2# V!IP( /'' '/
>i/#! !>#$ #=.'/#/ i$#)#ss #!$2s i--#/i'#)&*
C!i,i& P$!5$'-< B##%i %$!- WiMA P#$%!$-'"# T!/'&
Th# "!$# !% h# C!i,i& P$!5$'- is WiLAN?s "!--i-# h' '& ",$$# LIBRA
C,s!-#$ P$#-is# E,i.-# :CPE; i)) !.#$'# si/# & si/#( i h# s'-# #!$2( h#
s'-# "#)) '/ #># h# s'-# s#"!$ ih %,,$# WiMA "!-.)i' CPE?s* Th# C!i,i&
P$!5$'- i)) -ii-i# #!$2 '/ $#>#,# /is$,.i! '/ .$!#" ",s!-#$s?
i>#s-# i ",$$# #"h!)!5& h# #!$2s '$# $'sii!#/ ! WiMA "!-.)i'
#,i.-#* Y!, "' "!%i/#)& i>#s i LIBRA %!$ &!,$ #!$2 !/'& '/ -i5$'# !
WiMA i h# %,,$#*
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WiMA F!$,- @0+*19 His!$&
I +001 IEEE $#)#'s#/ h# IEEE @0+*19 s'/'$/( hi"h 's ! # h# %i$s !% s#>#$')
$!'/'/ Wi$#)#ssMAN s'/'$/s* Si"# h# h# IEEE h's "!i,#/ ! '// ! h'
's# s'/'$/ h$!,5h ' s# !% '-#/-#s( #'"h ih ' /i%%#$# %!",s*
I #'$)& +00+( WiLAN 6!i#/ N!2i'( Es#-)#( H'$$is '/ C$!ssS.'( '/ #"'-# '
%!,/i5 -#-#$ !% h# +11GH 5$!,. ihi WiMA F!$,-* As ' $#s,)( WiMA
F!$,-s "h'$#$ 's -!/i%i#/ ! .$!-!# ' si5)# 5)!') i#$!.#$')# s'/'$/ %!$
$!'/'/ i$#)#ss '""#ss 's#/ ! WiLANs WOFDM #"h!)!5& '/ h# IEEE
@0+*19 ETSI Hi.#$MAN s'/'$/s i h# +11Gh '/s*
I S#.#-#$ +003 /,$i5 h# +h s#ssi! !% h# IEEE @0+*19 W!$2i5 G$!,.( ' #
.$!6#"( @0+*19REV/( 's '..$!>#/ h' !,)/ $#s,) i s!-# "h'5#s %!$ IEEE
WiMA %!))!#$s '/ isi/#$s ')i2#* P$i!$ ! his( h# "!-.)## IEEE @0+*19 s'/'$/
's "!-.$is#/ !% h$## /!",-#s ihi h# IEEE @0+*19 5$!,. !% s'/'$/s IEEE S/
@0+*19+001( IEEE S/ @0+*19"+00+( '/ IEEE S/ @0+*19'+003* Th# s'/'$/
"!--!)& 2! 's 19' is i %'" ' '-#/-# ! h# IEEE @0+*19+001 '/ is !
' s'/ ')!# /!",-#* IEEE @0+*19REV/ :' "!-i'i! !% h# .$#>i!,s h$##
/!",-#s; 's $'i%i#/ '/ 's .,)ish#/ i S#.#-#$ +004*
IEEE @0+*19# is ' '-#/-# ! IEEE @0+*19+004( hi"h i)) '//$#ss '//i5
-!i)i& ! h# @0+*19 s'/'$/*
Th# WiMA F!$,- h's !>#$ +00 -#-#$ "!-.'i#s '/ is .!is#/ ! #5i "#$i%i"'i!
!% WiMA .$!/,"s i +007*
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" MARET >OR WIMAX
WiMA i)) !!s !/'&s hi5h)& %$'5-##/ BWA -'$2# h'2s !
s'/'$/i'i! '/ i#$!.#$'i)i&( s'#!%h#'$ $'/i! #%%i"i#"& ih NLOS
"'.'i)i&( '/ s$!5 s,..!$ %$!- h# $'/i! #,i.-# -',%'",$#$s '/ "hi.s#
i/,s$i#s* WiMA i)) ')s! '$5# h# /''"#$i" -!i)i& -'$2# ih h# i$!/,"i!
!% )!#$ .!#$"!s,-.i! "hi.s#s* Th# s$!5 s,..!$ %$!- s!-# !% h# -!s
i-.!$' "hi.s#s -',%'",$#$s s,"h 's I#) is ' 2#& #')#$ %!$ h# s,""#ss !%
WiMA( si"# i i)) )#'/ ! i/# '>'i)'i)i& !% '%%!$/')# WiMA#')#/ #$-i')s
:#*5*( )'.!.s( PDAs( #"*;*
"2"WiMAX prod()t a/ai!a;i!ity
M'ss /#.)!&-# !% WiMA .$!/,"s is .)'#/ i ! -'i s#.s<
1* -i/+007( '>'i)'i)i& !% h# @0+*19REV/ "hi.s#( '))!i5 h# /#>#)!.-# !%
"!s!.i-i#/ CPE !.#$'i5 i/!!$s :NLOS;(
+* i +009( '>'i)'i)i& !% @0+*19# "hi.s#s #-#//#/ i )'.!.s '/ )'#$ ! i !h#$
-!i)# /#>i"#s( #')i5 P!$')# I#$#*
W# #)i#># h' ",$$# .$# WiMA .$!/,"s '/ iii') @0+*19' WiMA .$!/,"s
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'>'i)')# i #'$)& +007( !.#$'i5 si-i)'$)& ! ",$$# .$!.$i#'$& #,i.-# :LOS( !
"!s!.i-i#/ CPE; '/ ' si-i)'$ "!s( i)) ! # i/#)& /#.)!/( #"',s# h#
!.#$'!$ ##/s ! 5! '/ is')) h# '#' ' h# ",s!-#$ .$#-is#( hi"h is
,#"!!-i"') %!$ $#si/#i') ",s!-#$ 's .$!>#/ i h# #'$)& /'&s !% ADSL is'))'i!*
This s'i/( @0+*19' i)) "#$'i)& # ,s#/ %!$ ' )#'s ! '$s ! h# -'$2# i/! !%
'"2h',)i5 !% !.#$'!$s si#s< i$#)#ss $'s-issi! !% WiFi h!s.! $'%%i" ! h# #'$#s
ISP .!i !% .$#s#"#( !$ /'' )#'s#/ )i#s "!"#$'i!( !$ 3G # s-')) si#
'"2h',)i5
"8" WiMAX7 a )omp!ement to *i?ed and
mo;i!e a))ess
WiMA i#5$'#s .#$%#")& i! #=isi5 %i=#/ '/ -!i)# #!$2s( "!-.)#-#i5
h#- h# ##/#/* This s#"i! 5i>#s ' -!$# /#'i)#/ '')&sis !% WiMA i#5$'i!
i! %i=#/ '/ h# -!i)# -'$2#s*
"#" WiMAX *or *i?ed 6ire!ess a))ess
N'i!i/# $!'/'/ '""#ss h's #"!-# ' .$i!$i& i -'& "!,$i#s* I -!s/#>#)!.#/
"!,$i#s( h# '>#$'5# $!'/'/ "!>#$'5# i)) $#'"h 0 i h# "!-i5 '$s* Si))( i
s!-# $,$') '$#'s !% s,"h "!,$i#s( $!'/'/ "!>#$'5# i)) ! #="##/ 70* Th# s#$>i"#
5'. "' # "'#5!$i#/ & ! "h'$'"#$isi"s< h# &.# !% '$#' :$,$') !$ ,$'; '/ h#
)#>#) !% 'i!') /#>#)!.-# :s## T')# 1;*I /#>#)!.#/ "!,$i#s( DSL s#$>i"#
/#.)!&-# h's ## -'ssi># i ,$' '/ s,,$' /#.)!&-#s( h#$#'s "!>#$'5# !%
$#-!# '$#'s s-'))#$ !s '/ $,$') '$#'s is )'55i5 #hi/* H,$/)#s ! !>#$"!-# '$#
h# .!!$ )i# ,')i& !% h# is'))#/ "!..#$ 's#( h# )'$5# /is'"#s ! h# "#$') !%%i"#s
!$ "'i#s( !$ h# )! .!.,)'i! /#si&* I his "!#=( WiMA( ih is !S s,..!$(
)!5#$ $#'"h( '/ /'' $'#s si-i)'$ ! DSL( is ',$'))& .!sii!#/ 's ' >i')# %i$s -i)#
!.i! ! !%%#$ $!'/'/ '""#ss ! $#si/#i') ,s#$s*
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"$ WiMAX *or Porta;!e Internet
"$"2 WiMAX7 t&e nat(ra! )omp!ement to mo;i!e and Wi0>i net6or5s
M!i)# #!$2s !%%#$ %,)) -!i)i&( 'i!i/# "!>#$'5# >!i"# s,..!$ '/ -!/#$'#
/'' $'#s* WiMA "' h# # .!sii!#/ 's ' "!-.)#-#'$& s!),i! & !%%#$i5
hi5h#$ '/i/h h# $#,i$#/( i .'$i",)'$ i /#s# ,$' '$#'s* P,)i" WLAN( hi)#
!%%#$i5 ")#'$ ##%is( is )i-i#/ i "!>#$'5# '/ -!i)i& "'.'i)ii#s* WiMA &
.'ss#s h#s# )i-i'i!s '/ !%%#$s $!'/'/ "!#"i>i& i )'$5#$ '$#'s :h!!#s;* Wi
Fi '/ WiMA s!),i!s '$# ')s! "!-.)#-#'$&( ih WiFi #i5 -!$# '/'.#/ %!$
sh!$$'5#( i/!!$ "!#"i!s :i .'$i",)'$ i h# ##$.$is# '/ ' h!-#; '/ WiMA
%!$ )!5 $'5# !,/!!$ "!#"i!s*
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"$"8">rom nomadi)ity to Porta;!e Internet
Whi)# !-'/i"i& !%%#$s "!#"i>i& ihi h# "!>#$'5# '$#' !% ' si5)# 's# s'i!(
P!$')# I#$# i-.)i#s s#ssi! "!i,i& h$!,5h!, h# #!$2* I '//ii! ' #
5##$'i! !% #!$2s ih -,)i'""#ss :3G( WiFi( WiMA( DSL( FTTU( #"*; #')#
#/,s#$s ! #6!& ' A)'&s B#s C!#"#/ #=.#$i#"# h# '""#ssi5 h#i$
'..)i"'i!s >i' h# #s '>'i)')# #!$2 ' h!-#( ! h# .',s#( !$ ! h# -!>#* S##
'!>#* WiMA #"!-#s ' '//ii!') $'/i! '""#ss s!),i! i h# 5)!') #!$2
'$"hi#",$#*
"1" T&e WiMAX CPE
I -!s "'s#( ' si-.)# .),5 '/ .)'& #$-i')( si-i)'$ ! ' DSL -!/#-( .$!>i/#s
"!#"i>i&* S## Fi5,$#* F!$ ",s!-#$s )!"'#/ s#>#$') 2i)!-##$s %$!- h# WiMA
's# s'i!( ' s#)%is')) !,/!!$ '#' -'& # $#,i$#/ ! i-.$!># $'s-issi!
,')i&* T! s#$># is!)'#/ ",s!-#$s( ' /i$#"i># '#' .!ii5 ! h# WiMA
's# s'i! -'& # $#,i$#/* F!$ ",s!-#$s $#,#si5 >!i"# i '//ii! !
$!'/'/ s#$>i"#s( s.#"i%i" CPE i)) '))! h# "!#"i! !% s'/'$/ !$ V!IP .h!#s*
U)i-'#)&( WiMA "hi.s# i)) # #-#//#/ i /''"#$i" /#>i"#s*
"3 "Operators ;(siness )ase
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WiMA is !% i#$#s %!$ i",-#( ')#$'#( '/ -!i)# !.#$'!$s* S!-# ,si#ss
"'s#s '$# .!ssi)#*
1* Th# i",-# !.#$'!$s "' ,s# h# i$#)#ss #"h!)!5& 's ' "!-.)#-# ! DSL(
'))!i5 h#- ! !%%#$ DSL)i2# s#$>i"#s i $#-!#( )!/#si& '$#'s h' "'! #
s#$>#/ ih DSL*
+* F!$ ')#$'# !.#$'!$s( h# i$#)#ss #"h!)!5& is h# s!),i! %!$ ' "!-.#ii># hi5h
s.##/ I#$# '/ >!i"# !%%#$i5 &.'ssi5 h# )'/)i# %'"i)ii#s( ih '..)i"'i)i& i
,$' !$ s,,$' '$#'s*
3* Th# )'$5#$ !..!$,i& i)) "!-# ih h# P!$')# I#$# ,s'5#( "!-.)#-#i5
%i=#/
'/ -!i)# s!),i! i ,$' '/ s,,$' '$#'s* Th#$#%!$# i i)) #h'"# h# ,si#ss
"'s# & 5i>i5 '""#ss ! ' )'$5# .!#i') !% #/ ,s#$s*
"4"WiMAX7 t&e o;/io(s )&oi)e *or
Operators
B& i#5$'i5 WiMA i! h#i$ #!$2s( -!i)# !.#$'!$s "' !!s h#i$ s#$>i"# ih
hi5h '/i/h( h# #"#ss'$&( h# s'-# '..)i"'i!s :-#ss'5i5( '5#/'( )!"'i!
's#/ s#$>i"#s( ; #i5 !%%#$#/ ! !h #!$2s ih ' si5)# i))i5 '/ s,s"$i#$
.$!%i)#* M!i)# !.#$'!$s "' ')s! $#,s# #=isi5 $'/i! si#s '/ '"2h',)i5 #,i.-# !
%'"i)i'# h# /#.)!&-# !% WiMA* Fi=#/ !.#$'!$s( i",-# !$ ')#$'#( i)) !%%#$
!-'/i" '/ P!$')# I#$# ,s'5# 's ' '//ii! ! h#i$ %i=#/ '""#ss !%%#$i5 !
"!-.)#-# h#i$ DSL '/ WiFi ,/)#* F!$ h!s# h'>i5 /#.)!/ WiMA %!$ %i=#/
'""#ss( his is ')s! ' ',$') #>!),i! !% h#i$ !%%#$i5*
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" WIMAX TECHNOLOGY CHALLENGE
"2"WiMAX7 more *!e?i;i!ity and se)(rity
U)i2# WLAN( WiMA .$!>i/#s ' -#/i' '""#ss "!$!) :MAC; )'$
h' ,s#s ' 5$'$#,#s -#"h'is- ! ',h!$i# h# #="h'5# !% /''* This %#',$#
'))!s ##$ #=.)!i'i! !% h# $'/i! $#s!,$"#s( i .'$i",)'$ ih s-'$ '#'s( '/
i/#.#/# -''5#-# !% h# $'%%i" !% #>#$& ,s#$* This si-.)i%i#s h# s,..!$ !% $#')
i-# '/ >!i"# '..)i"'i!s *O# !% h# ihii!$s ! i/#s.$#'/ /#.)!&-# !% WLAN
's h# .!!$ s#",$i& %#',$# !% h# %i$s $#)#'s#s* WiMA .$!.!s#s h# %,)) $'5# !%
s#",$i&
%#',$#s ! #s,$# s#",$#/ /'' #="h'5#<
1* #$-i') ',h#i"'i! & #="h'5i5 "#$i%i"'#s ! .$#># $!5,# /#>i"#s(
+* ,s#$ ',h#i"'i! ,si5 h# E=#si)# A,h#i"'i! P$!!"!) :EAP;(
3* /'' #"$&.i! ,si5 h# D'' E"$&.i!
S'/'$/ :DES; !$ A/>'"#/ E"$&.i! S'/'$/ :AES;( !h -,"h -!$# $!,s h'
h# Wi$#)#ss E,i>')# P$i>'"& :WEP; iii'))& ,s#/ & WLAN* F,$h#$-!$#( #'"h
s#$>i"# is #"$&.#/ ih is ! s#",$i& 'ss!"i'i! '/ .$i>'# 2#&s*
"8" WiMAX7 a /ery e**i)ient radio so!(tion
WiMA -,s # ')# ! .$!>i/# ' $#)i')# s#$>i"# !>#$ )!5 /is'"#s ! ",s!-#$s ,si5
i/!!$ #$-i')s !$ PC "'$/s :)i2# !/'&s WLAN "'$/s; *Th#s# $#,i$#-#s( ih
)i-i#/ $'s-i .!#$ ! "!-.)& ih h#')h $#,i$#-#s( i)) )i-i h# )i2 ,/5#*
S,"h'#))i5 i ,.)i2 '/ s-'$ '#'s ' h# 's# s'i! h's ! !>#$"!-# h#s#
"!s$'is* Th# WiMA s&s#- $#)i#s ! ' # $'/i! .h&si"') :PHY; )'$ '/
'..$!.$i'# MAC )'$ ! s,..!$ ')) /#-'/s /$i># & h# '$5# '..)i"'i!s* Th#
PHY )'$ -!/,)'i! is 's#/ ! OFDMA( i "!-i'i! ih ' "#$')i#/ MAC
)'$ %!$ !.i-i#/ $#s!,$"# '))!"'i! '/ s,..!$ !% !S %!$ /i%%#$# &.#s !% s#$>i"#s
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:V!IP( $#')i-# '/ ! $#')i-# s#$>i"#s( #s #%%!$;* Th# OFDMA PHY )'$ is #))
'/'.#/ ! h# NLOS .$!.'5'i! #>i$!-# i h# + 11 GH %$#,#"& $'5#* I is
ih#$#)& $!,s h# i "!-#s ! h'/)i5 h# si5i%i"' /#)'& s.$#'/ "',s#/ & h#
&.i"') NLOS $#%)#"i!s* T!5#h#$ ih '/'.i># -!/,)'i!( hi"h is '..)i#/ ! #'"h
s,s"$i#$ i/i>i/,'))& '""!$/i5 ! h# $'/i! "h'#) "'.'i)i&( OFDMA "' .$!>i/# '
hi5h s.#"$') #%%i"i#"& !% '!, 3 4 isH* H!#>#$( i "!$'s ! si5)# "'$$i#$
-!/,)'i!( h# OFDMA si5') h's ' i"$#'s#/ .#'2< '>#$'5# $'i! '/ i"$#'s#/
%$#,#"& '"",$'"& $#,i$#-#s* Th#$#%!$#( s#)#"i! !% '..$!.$i'# .!#$ '-.)i%i#$s
'/ %$#,#"& $#"!>#$& "!"#.s '$# "$,"i')* WiMA .$!>i/#s %)#=ii)i& i #$-s !%
"h'#)i'i!( "'$$i#$ %$#,#"&( '/ /,.)#= -!/# :TDD '/ FDD; ! -## ' >'$i#& !%
$#,i$#-#s %!$ '>'i)')# s.#"$,- $#s!,$"#s '/ '$5##/ s#$>i"#s* A i-.!$' '/
>#$& "h'))#5i5 %,"i! !% h# WiMA s&s#- is h# s,..!$ !% >'$i!,s '/>'"#/
'#' #"hi,#s( hi"h '$# #ss#i') ! .$!>i/# hi5h s.#"$') #%%i"i#"&( "'.'"i&(
s&s#- .#$%!$-'"#( '/ $#)i'i)i&<
1* #'- %!$-i5 ,si5 s-'$ '#'s .$!>i/#s '//ii!') 5'i ! $i/5# )!5 /is'"#s
!$ ! i"$#'s# i/!!$ "!>#$'5# i $#/,"#s i#$"#)) i#$%#$#"# '/ i-.$!>#s %$#,#"&
$#,s#(
+* $'s-i /i>#$si& '/ MIMO #"hi,#s ,si5 -,)i.)# '#'s '2# '/>''5# !%
-,)i.'h $#%)#"i!s ! i-.$!># $#)i'i)i& '/ "'.'"i&*
"#" System per*orman)e
T')# + 5i>#s &.i"') "#)) si# '/ h$!,5h., ' 3*7 GH i >'$i!,s "!%i5,$'i! '/
#>i$!-#s*
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82" WIMAX AN, EXISTING TECHNOLOGIES
82"2" WiMAX di**erent *rom Wi0>i:
A)h!,5h h# %,/'-#') #"h!)!5& is h# s'-#( !>#$ i-# # "' '// )#>#)s !%
s!.hisi"'i! ! WiMA* WiFi "h'#)s !"",.& ' %i=#/ i/h !% h# s.#"$,-* B,
ih WiMA( #$# 5!i5 ! #')# h# $'%%i" )'#s 8 !$ "h'#)s 8 ! 5# s-'))#$ '/
'$$!#$* This h#).s s#$>i"# .$!>i/#$s s##2i5 ! !%%#$ i$#)#ss )'s-i)# DSL !$ "')#
&.# s#$>i"# #"',s# h#& "' .$!>i/# ' '$$!#$ "h'#) h' ,s#s )#ss '/i/h '/
s#$># -!$# ,s#$s* Y!, "' '2# h' ,s#/ ! # ' %i=#/ WiFi )'# '/ -'2# ' ,"h
-!$# )'#s*
Th# !h#$ i5 /i%%#$#"# ### WiFi '/ WiMA 8 s'$i5 $i5h ''& 8 is h' #$#
5!i5 ! ,s# )i"#s#/ s.#"$,- ! /#)i>#$ WiMA* T! /'#( ')) WiFi #"h!)!5& h's
## /#)i>#$#/ i ,)i"#s#/ s.#"$,-* WiMA i)) ,s# !# !% h# ,)i"#s#/
%$#,#"i#s( , #$# ')s! s,..!$i5 ! !h#$ %$#,#"i#s h' '$# )i"#s#/* Wh' h'
-#'s is h' &!, "' ,$ ,. h# !,., .!#$ '/ $!'/"'s )!5#$ /is'"#s* S! h#$#
WiFi is s!-#hi5 h' is -#'s,$#/ i h,/$#/s !% %##( ,s,'))& WiMA i)) h'># '
>#$& 5!!/ >'),# .$!.!sii! '/ '/i/h ,. ! s#>#$') -i)#s*
A)s! WiMA is /#si5#/ ! # ' "'$$i#$5$'/# #"h!)!5&( hi"h $#,i$#s ' hi5h#$ )#>#)
!% $#)i'i)i& '/ ,')i& !% s#$>i"# h' '$# ! '>'i)')# i &.i"') WiFi
i-.)#-#'i!s*
Th!s# %,/'-#') /i%%#$#"#s -'2# WiMA -!$# !% ' -#$!.!)i' '$#' '""#ss
#"h!)!5& >#$s,s h!s.!*
82"8" Wima? and $G
3G h's ## ,i) ! h# %!,/'i! !% ' >!i"# #!$2* A/ h# 3G "!--,i& is '//i5
/'' "'.'i)i& ! i* O,$ !6#"i># %!$ WiMA @0+*19# is ! # ' hi5h s.##/ /'' s#$>i"#
h' "' # ,s#/ ! #=#/ '/ "!-.)#-# 3G s#$>i"#* W# 2! !% s#>#$') 3G s#$>i"#
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.$!>i/#$s h' '$# !$$i#/ h' 's /'' ,s# 5$!s h#& i)) ! h'># #!,5h s.#"$,- %!$
!h h#i$ >!i"# ",s!-#$s '/ h#i$ /'' ",s!-#$s* S! h#&$# i#$#s#/ i WiMA 's '
"!-.)#-#'$& /'' s#$>i"# #"h!)!5& h' h#& "' /#.)!& ih h#i$ 3G >!i"# s#$>i"#*
S! #ss#i'))&( WiMA is >#$& '$5##/ %!$ i$#)#ss /''( ! i$#)#ss >!i"#*
Th#$#s '!h#$ i5 /i%%#$#"# ### WiMA '/ "#)),)'$ #"h!)!5i#s i 5##$')*
C#)),)'$ 5$# ,. 8 -!$# !$ )#ss 8 h#$# h# h!)# s&s#- 's '$"hi#"#/ %$!- h#
#!$2 '/ 's# s'i! ')) h# '& !, ! h# ")i# 8 &.i"'))& h# .h!# 8 '/ /i%%#$#
>#/!$s #,i.-# /i/ #"#ss'$i)& !$2 !5#h#$* E>#,'))& h#$# #$# ' )! !%
s#.'$'# #!$2s* R!'-i5 '5$##-#s h'># ## ., i .)'"#( s! h' -!$# s! '/ -!$#
s! &!, "' !$2 ! !h#$ .#!.)#s #!$2s( ')h!,5h &!,)) # "h'$5#/ #=$' %!$ i* Wih
WiMA #$# !$2i5 ! 5# h' &.# !% i#$!.#$'i)i& '/ -!$# %$!- D'& O#*
Th' -#'s i% &!, ,& ' ")i# -'/# !, !% si)i"! & I#)( &!, "!,)/ ,s# i ! s#>#$')
/i%%#$# #!$2s #># i% h# 's# s'i!s '$# .$!>i/#/ & /i%%#$# "!-.'i#s*
82"#" W&at 6i!! (sers ;e a;!e to do /ia WiMAX t&at t&ey )ant do 6it& e?istin'
te)&no!o'ies:
Th#$# '$# '$#'s !% h# !$)/ #s.#"i'))& i #-#$5i5 -'$2#s '/ $,$') '$#'s 8 h#$#
/#.)!&i5 i$#/ $!'/'/ i%$'s$,",$# is ! "!s #%%#"i>#* WiMA is >#$& "!s
#%%#"i># #"h!)!5& ! ,i"2)& /#.)!& i h# $#5i!s hi"h !h#$is# !,)/ ! h'>#
$!'/'/ '""#ss* S! WiMA h#).s s.$#'/ $!'/'/ ! -!$# ,s#$s *
A!h#$ ##%i !% WiMA is h# 'i)i& ! 5# hi5h#$ "!#"i! s.##/s %'$h#$ ''&
%$!- h# $'s-i#$* Ri5h ! &!, "' 5# ' $#'))& hi5h s.##/ "!#"i! i WiFi ")!s#
! h# $'s-i#$* Th# !h#$ !.i! is h' &!, "' 5# ' .$#& s)! I#$# "!#"i!
,si5 ' "#)),)'$ #"h!)!5&( hi"h s.'s ' 5$#'#$ /is'"#* WiMA %is ### h!s#
! !%%#$i5s* Y!,)) 5# s.##/s si-i)'$ ! ")!s#,. WiFi "!#"i!s !, ! s#>#$')
-i)#s* *
WiMA i)) ')s! # -,"h #'si#$ ! is'))( hi"h -'2#s i -!$# "!s#%%#"i># %!$
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s#$>i"# .$!>i/#$s '/ h!.#%,))& s!-# !% h!s# s'>i5s i)) '""$,# ! ,s#$s* F!$ #='-.)#(
ih @0+*19+004( s#$>i"# .$!>i/#$s i)) # ')# ! !%%#$ ,s#$s )'s -i)# '""#ss ih '
#=#$') '#' -!,* Sh!$)& h#$#'%#$ # #=.#" ! !%%#$ h' s'-# s#$>i"# s! .#!.)#
"' ., h' '#' isi/# ! h#i$ /#s2 #'$ h#i$ i/!* Eih#$ '&( is #'si#$ !
is')) h' WiFi( hi"h $#,i$#s .$#"is# ')i5-# ### '""#ss .!is* O,$ 5!') h#$#
is ! #')# s#)% is'))'i!*
Wh# @0+*19# "!-#s !, i +009( h# i-.$!>#-#s #"!-# -!$# !>i!,s* This is
h#$# #$# '//i5 s"')'i)i& '/ -,)i'""#ss "'.'i)ii#s ! h# %i=#/ OFDM
#"h!)!5&* W#)) -'2# h# "h'#)s s"')')# '/ h# )'#s /i%%#$# si#s ! #=#/
$!'/'/ i$#)#ss '""#ss '"$!ss ' )'$5#$ 5#!5$'.h&* As I -#i!#/ #'$)i#$( %i=#/
i$#)#ss '""#ss is 2! 's OFDM( '/ h# i/,s$& #$- %!$ his s"')')# #"h!)!5& is
SOFDMA 8 !$ S"')')# OFDM M,)iA""#ss* F$!- h# #"hi"') si/#( is ' .$#& i5
"h'5#* S! is >#$& si-i)'$ i "!"#. ! !/'&s -!$# #>!)>#/( -,)i'""#ss "#)),)'$
#"h!)!5i#s*
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88" PROGRESS ON WIMAX STAN,AR,
Th# "!$# @0+*19 s.#"i%i"'i! 's ' 'i$ i#$%'"# s'/'$/ %!$
$!'/'/ i$#)#ss '""#ss s&s#-s ,si5 .!i!-,)i.!i i%$'s$,",$# /#si5s '/
!.#$'i5 ' $'/i! %$#,#"i#s ### 10 GH '/ 99 GH* Th' s'/'$/ 's
"!-.)## i -'& .#!.)#s -i/s* I '..)i#/ !)& ! )i#!%si5h /#.)!&-# i h#
)i"#s#/ s.#"$,-( /i/ !%%#$ '& "!%!$-'"# 5,i/#)i#s( '/ i5!$#/ !5!i5
/#>#)!.-# !% h# si-i)'$ E,$!.#' Hi.#$MAN s'/'$/*
.
Th# @0+*19' "!))#"i! !% '-#/-#s '2#s i! '""!, h# #-#$5#"# !% )i"#s#/ '/
)i"#s##=#-. $!'/'/ i$#)#ss #!$2s !.#$'i5 ### + GH '/ 11 GH( ih
s,..!$ %!$ !)i#!%si5h '$"hi#",$#s h' "!,)/ ! # s,..!$#/ i hi5h#$
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%$#,#"& $'5#s* Th# @0+*19' >#$si! '//s h$## # PHY)'$ s.#"i%i"'i!s< ' si5)#
"'$$i#$ )'$( ' +79.!i FFT OFDM :%'s F!,$i#$ $'s%!$- !$h!5!') %$#,#"&
/i>isi! -,)i.)#=i5; )'$( '/ ' +04@.!i FFT OFDMA )'$ . Th# +79.!i
'>#%!$- is #-.)!/ & !h WiMA '/ h# E,$!.#' T#)#"!--,i"'i!s
S'/'$/s Isi,# :ETSI;s Hi.#$MAN s'/'$/( #s,$i5 !$)/i/# i#$!.#$'i)i&*
Th# '-#/#/ s'/'$/ '))!s WiMA /#.)!&-# i >'$&i5 "h'#) "'.'"ii#s !
'//$#ss h# /i%%#$# '-!,s !% s.#"$,- h' "'$$i#$s ! %$!- -'$2# ! -'$2# '/ i
/i%%#$# .'$s !% h# !$)/* Th# i"),si! !% i-# /i>isi! /,.)#=i5 :TDD; '/
%$#,#"& /i>isi! /,.)#=i5 :FDD; '//s ! WiMAs i#$'i!') .!#i')*1 Th#
@0+*19' >#$si! ')s! -'2#s #h'"#-#s ! h# M#/i' A""#ss C!$!) :MAC; )'$(
'/ '//s ,')i& !% s#$>i"# %#',$#s*Whi)# @0+*19' /!#s -,"h ! i-.$!># ! h# !$i5i') s'/'$/( h# "!$# s'/'$/ h's h'/
#!,5h '-#/-#s ''"h#/ ! i h' h# IEEE is ! $#/$'%i5 h# s.#"i%i"'i!* Th#
# s'/'$/( $#%#$$#/ ! 's @0+*19 R#>isi! D( 's '..$!>#/ 's ' IEEE s'/'$/ i
J,# +004* Th# # "!$# s.#"i%i"'i! i)) i"),/# #>#$&hi5 h' h's "h'5#/ '!, h#
s'/'$/ h,s %'$* Th# i +007( h# IEEE .)'s ! .$!/,"# @0+*19#( h# '-#/-#
i$!/,"i5 -!i)i&*
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8#" INTEL=S ROLE IN WIMAX
Th# i$#)#ss i/,s$& is #>!)>i5 %$!- ' # !% i/#.#/#
#!$2s i! ' si5)#( i#5$'#/ i$#)#ss #!$2 ih -,)i.)# s'/'$/s* Th#
#=.#"'i! is h' WiFi( WiMA '/ 3G i)) "!#=is '/ h' h#i$ "!#=is#"# is 5!i5
! #')# ' h!s !% #="ii5 # '..)i"'i!s '/ ,si#ss -!/#)s*
I#) is /#>#)!.i5 s'/'$/i#/( hi5h.#$%!$-'"# si)i"! ! '//$#ss ')) !% h# -,)i.)#
$!'/'/ i$#)#ss #"h!)!5i#s( 's #)) 's ' $'5# !% .$!/,"s %!$ -!/,)'$
"!--,i"'i!s #!$2s h' i)) # "$,"i') i h# /#.)!&-# !% $!'/'/ i$#)#ss*
Th# %i$s @0+*19#')#/ "hi.s '$# s"h#/,)#/ %!$ shi.-# i h# s#"!/ h')% !% +004*
WiMA "'.'i)i& ,i) i! !#!!2 "!-.,#$s is '$5##/ %!$ +009( %!))!#/ &
h'/s#s '$5##/ %!$ +00*
I#) %!$#s##s si5i%i"' WiMA !..!$,ii#s !>#$ h# #= %i># '$s( si-i)'$ ! h!s#
h' #-#$5#/ ih WiFi* I#) 'i"i.'#s %i$s ' .$!5$#ssi! %$!- %i=#/ @0+*19 i$#)#ss
#!$2s ! 's# s'i!s #-.)!&i5 h# #-#$5i5 @0+*19# s.#"i%i"'i! %!$ $!'/'/
i$#)#ss .!$'i)i&* F'$h#$ !%% ! h# h!$i! is s#'-)#ss -!i)i&*
I#) h's %!$-'))& '!,"#/ is %i$s WiMA .$!/,"( ' s&s#-!'"hi. "'.')# !%
$#"#i>i5 i$#)#ss $!'/'/ si5')s !h isi/# '/ !,si/# ",s!-#$ .$#-is#s*
Th# P$!Wi$#)#ss 7119 is %,))& "!-.)i' ih h# @0+*19+004 s'/'$/( I#) s'i/( '/ is
h# %i$s .$!/," !% is 2i/ ! # !.i-is#/ %!$ "!s#%%#"i># -!/#-s '/ $#si/#i')
5'#'&s( h# "hi.-'2#$ s'i/* P$!/,"s 's#/ ! h# .'$ '$# #=.#"#/ ! shi. & h#
#/ !% h# '$( h'>i5 %i$s 5'i#/ i#$!.#$'i)i& "#$i%i"'i! %$!- i/,s$& !/& h#
WiMA F!$,-( hi"h !/'& "!>#i#)& '!,"#/ 6,s s,"h ' "#$i%i"'i!
.$!5$'--#*
F!$-#$)& 2! & is "!/#'-#( R!s#/')#( h# 7119 is /#si5#/ ! -'i'i $!'/'/
"!#"i!s ### %i=#/ '#'#* F,,$# >#$si!s !% h# .$!/," '$# #=.#"#/ !
s,..!$ h# @0+*19# s.#"i%i"'i!( hi"h '//s s,..!$ %!$ -!i)# #/,s#$ 2i* L's ##2(
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I#) .)#/5#/ ! s!)># i si)i"! h# ih#$# i"!-.'ii)ii#s ### h# @0+*19# '/
@0+*19+004 s.#"i%i"'i!s*
M#'hi)#( h# 7119 h's ')$#'/& ! h# s,..!$ !% #,i.-# -'2#$s( ih h# )i2#s !%
Ai$s.'( A)>'$i!( A.#$!( G#-#2( H,'#i( P$!=i-( R#/)i#( Si#-#s '/ XTE >!i"i5
h#i$ #h,si's- %!$ I#)s # i$#)#ss "hi.* S! !! /i/ ' $'5# !% "'$$i#$s( ')) )!!2i5
! ,s# WiMA ! #=#/ h# $#'"h !% h#i$ $!'/'/ !%%#$i5s*
Th# WiMA F!$,-s i#$!.#$'i)i& "#$i%i"'i! .$!5$'--# i)) !.#$'# !, !% is
M')'5'( S.'i %'"i)i&( '/ i)) !.# %!$ ,si#ss i J,)&* I i)) '2# i h# E,$!.#'
T#)#"!--,i"'i!s S'/'$/s Isi,# :ETSI; Hi.#$MAN s.#"i%i"'i!* A)) S!,h
K!$#' !.#$'!$s '"2i5 h# )!"') WiMA)i2# WiB$! s&s#- '$# ! -#-#$s !% h#
F!$,-( hi"h sh!,)/ ,)i-'#)& #s,$# i#$!.#$'i)i& ### h#s# ! #"h!)!5i#s
!!*
Th# %i$s WiMA F!$,- C#$i%i#/ .$!/,"s '$# #=.#"#/ i h# N!>#-#$D#"#-#$
i-#%$'-#( h# F!$,- s'i/* Th# F!$,- i)) iii'))& "#$i%& #,i.-# 's#/ ! !
.$!%i)#s< Ti-# Di>isi! D,.)#=i5 :TDD; '/ F$#,#"& Di>isi! D,.)#=i5 :FDD; i
h# 3*7GH %$#,#"& '/ ih 3*7MH "h'#)is'i!* B's#/ ! -'$2# /#-'/ '/
>#/!$ .$!/," s,-issi!s( -!$# .$!%i)#s i)) # '//#/ i +009( i s'i/* Th# F!$,- .$!-is#/ ')) %,,$# #h'"#-#s ! h# 's#)i# .$!%i)#s i)) s,..!$ '"2'$/
"!-.'ii)i&*
http://www.theregister.co.uk/2005/04/14/802-16_wimax_muddle/http://www.theregister.co.uk/2005/04/14/802-16_wimax_muddle/
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13* WIMA SPECTRUM AND REGULATION ISSUES
WiMA"!-.)i' #,i.-# i)) # '))!#/ ! !.#$'# i !h
)i"#s#/ '/ ,)i"#s#/ '/s* Th# -ii-,- "h'#) '/i/h %!$ WiMA ,s'5# is
1*7 MH .#$ "h'#)( hi)# 10 MH is "!si/#$#/ 's ' !.i-,-* A)h!,5h +*4 GH
'/ 7 GH !)i"#s#/ '/s '$# )'$5#)& '>'i)')#( h#i$ ,s'5# "!,)/ # )i-i#/ ! $i')s
#"',s# !% h# $is2s !% i#$%#$#"# .$#>#i5 !S "!--i-#s* Th# +*7 '/ 3*7 GH
)i"#s#/ '/s i)) # h# -!s "!--! '/s %!$ WiMA '..)i"'i!s* I sh!,)/ #
!#/ h' h# 7 GH '/ is ')s! .'$i'))& )i"#s#/ i s!-# "!,$i#s* M!s "!,$i#s
h'># ')$#'/& '))!"'#/ )i"#s#/ s.#"$,-( 5##$'))& ! ')#$'# !.#$'!$s* N#>#$h#)#ss
)'$5# ,'ii#s !% s.#"$,- '$# si)) i .$!"#ss !% '))!"'i!( '/ s!-# "!,$i#s h'># !
#># /#%i#/ '& WiMA )i"#s#/ '/s * WiMA is /#si5#/ ! '""!--!/'#
#ih#$ F$#,#"& Di>isi! D,.)#=i5 :FDD;( hi"h is -!$# s,i#/ ! ##$.$is# $'%%i"( !$
Ti-# Di>isi!
D,.)#=i5 :TDD;( hi"h is -!$# '/'.#/ ! 's&--#$i"') $'%%i"* C!h'i'i! !% FDD
'/ TDD #"hi,#s is .!ssi)# ihi h# s'-# '/s( .$!>i/#/ 5,'$/ '/s '$#
i-.)#-##/*
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81" WHAT LIES AHEA,
I#) is !$2i5 h$!,5h h# WiMA F!$,- ! %'"i)i'# h#
/#.)!&-# !% $!'/'/ #!$2s 's#/ ! h# @0+*19 s'/'$/* Th# WiMA F!$,-
"!siss !% -!$# h' 100 -#-#$s( i"),/i5 )#'/i5 #,i.-# -',%'",$#$s( s#$>i"#
.$!>i/#$s '/ s&s#-s i#5$'!$s* Th# !$5'i'i! i)) h#). #s,$# h# "!-.'ii)i&
'/ i#$!.#$'i)i& !% WiMA $!'/'/ i$#)#ss '""#ss #,i.-#*
A",') .$!/,"s '$# ! h' %'$ !%%* I J,# +004( I#) '/ P$!=i- C!$.!$'i!
'!,"#/ ' "!))'!$'i! ! /#>#)!. '/ /#)i>#$ @0+*19 s!),i!s %!$ %i=#/ '/ .!$')#
$!'/'/ i$#)#ss '""#ss* Th# '5$##-# i"),/#s h# /#>#)!.-# !% 's# s'i! '/
s,s"$i#$ ,i '""#ss .!is* As .'$ !% h# '5$##-#( h# "!-.'i#s i)) "!/#>#)!. '
$#%#$#"# /#si5 %!$ WiMA ",s!-#$ .$#-is# #,i.-#* This $#%#$#"# /#si5 i))
#')# s,s"$i#$ s'i! /#si5#$s ! $i5 .$!/,"s ! -'$2# %'s#$( h#).i5 .$!)i%#$'#
h# ,s# !% @0+*19 %!$ !h )i"#s#/ '/ ,)i"#s#/ #!$2s* P$!=i- .)'s ! /#)i>#$ is
%i=#/ WiMA"#$i%i#/ $!'/'/ i$#)#ss s!),i! i #'$)& +007 '/ .!$')# WiMA
"#$i%i#/ s!),i!s i )'# +007*
I#) h's ')s! '!,"#/ i is !$2i5 ih #)#"!--,i"'i!s #,i.-# "!-.'i#s
Ai$s.' N#!$2s( A)>'$i!( A.#$! N#!$2s '/ R#/)i# C!--,i"'i!s ! WiMA
#,i.-# ,si5 I#) si)i"!* T#)#"!- "'$$i#$s !$2i5 ih I#) i"),/# B$iish
T#)#"!-( I#$'/' :S.'i;( PCCW :H!5 K!5; '/ R#)i'"# I%!"!-- :I/i';*
http://www.intel.com/pressroom/archive/releases/20040617net.htmhttp://www.intel.com/pressroom/archive/releases/20040617net.htm
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83" CONCL%SION
Th# )'#s /#>#)!.-#s i h# IEEE @0+*19 5$!,. '$# /$i>i5 '
$!'/'/ i$#)#ss '""#ss $#>!),i! h'2s ! ' s'/'$/ ih ,i,# #"hi"')
"h'$'"#$isi"s* I .'$'))#)( h# WiMA %!$,-( '"2#/ & i/,s$& )#'/#$s( h#).s h#
i/#s.$#'/ '/!.i! !% $!'/'/ i$#)#ss '""#ss & #s')ishi5 ' $'/ %!$ h#
#"h!)!5&* Iii'))&( WiMA i)) $i/5# h# /i5i') /i>i/# '/ h'2s ! "!-.#ii>#
#,i.-# .$i"#s( h# s"!.# !%
WiMA /#.)!&-# i)) $!'/# ! "!>#$ -'$2#s h#$# h# )! POTS .##$'i!(
hi5h DSL ,,/)i5 "!ss( !$ .!!$ "!..#$ ,')i& h'># '"#/ 's ' $'2# ! #=#si>#
hi5hs.##/ I#$# '/ >!i"# !>#$ $!'/'/* WiMA i)) $#'"h is .#'2 & -'2i5
P!$')# I#$# ' $#')i&* Wh# WiMA "hi.s#s '$# i#5$'#/ i! )'.!.s '/ !h#$ .!$')# /#>i"#s( i i)) .$!>i/# hi5hs.##/ /'' s#$>i"#s ! h# -!>#( #=#/i5 !/'&s
)i-i#/ "!>#$'5# !% .,)i" WLAN ! -#$!.!)i' '$#'s* I#5$'#/ i! # 5##$'i!
#!$2s ih s#'-)#ss $!'-i5 ### >'$i!,s '""#ss#s( i i)) #')# #/,s#$s !
#6!& ' A)'&s B#s C!#"#/ #=.#$i#"#*
Th# "!-i'i! !% h#s# "'.'i)ii#s -'2#s WiMA '$'"i># %!$ ' i/#
/i>#$si& !% .#!.)#< %i=#/ !.#$'!$s( -!i)# !.#$'!$s '/ i$#)#ss ISPs( , ')s! %!$
-'& >#$i"') -'$2#s '/ )!"') ',h!$ii#s* A)"'#)( h# !$)/i/# $!'/'/ -'$2#
)#'/#$ ih ' -'$2# sh'$# i #="#ss !% 3( is "!--i#/ !%%#$ "!-.)## s,..!$ '"$!ss
h# #i$# i>#s-# '/ !.#$'i!') "&")# $#,i$#/ %!$ s,""#ss%,) /#.)!&-# !%
WiMA s#$>i"#s*
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84" RE>ERENCES
84"8 RE>ERE, GENERALS9
1* IEEE @0+*19*3"01+$4( Ch'#) M!/#)s %!$ Fi=#/ Wi$#)#ss A..)i"'i!s,”
+* WiMA< Th# C$ii"') Wi$#)#ss S'/'$/( B),#P$i WiFi R#.!$(O"!#$ +003
3* WiMA@0+*19 '/ @0+*+0( ABI R#s#'$"h( 4 +00( L's Mi)# Wi$#)#ss Hi5h S.##/
M'$2#( S2&)i5h R#s#'$"h(M'$"h +004
84"#"+ISITE, SITES9
1* *H! S,%% W!$2s *"!-+* *WIMA FORUM*"!-
3* *i-'=%!$,-*!$5
http://www.how/http://www.wimax/http://www.how/http://www.wimax/