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According to the 3GPP a physical channel is defned by
Specifc requency
Scrambling code
Channelization code
Radio Frame: A radio rame is a processing duration which
consists o slots. he
length o the !adio rame corresponds to 3"#$$ chips or %$ms.
&t uses ' ()z *which also considers the guard bands on
either sides+. he guard
band in ,(S is $.'" ()z or '"$ -)z. )ence i we eclude the guard
bands on both
sides o the ' ()z spectrum/ we get an e0ecti1e bandwidth o 3.84
MHz/ which is
used or transmission o the signals.
Slot: A slot is a duration which consists o feld containing
bits. he length o a slot
corresponds to 2'$ Chips or 243ms.
Sub-frame5 A sub6rame is the basic time inter1al or 768C) and
)S68SC)
transmission and 768C) and )S68SC)6 related signaling at the
physical layer. he
length o a sub6rame corresponds to 3 Slots *9"$ Chips+ or
2ms.
Calculation
:o o ime Slots ;%'
Chip !ate ;3."#()z
ime period o %' ime Slots;%$ms
ime period o per timeslot ;%$4%'
243ms
:o o chips in one ime slot ;3"#$$$$)z4%'2'$$$ Chips
he length o Sub6rame is 2ms ha1ing 3 slots so the :o o Chips in
2ms Sub6rame
;2'$$$
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Primary Syncronization Cannel!P-SCH"
#$
At Switch on ,7 loo=s or P6SC) and tries to
fnd the beginning o a time slot by using a
globally unique code call PrimarySynchronization Code. )ence
P6SC) is the
starting point o all ,(S Acti1ities.
Secondary Syncronization Cannel!S-
SCH" #$
Ater fnding the beginning o Slot using P6SC)
,7 searches or S6SC) and tries to identiy the
beginning o radio rame by using a sequenceo secondary
synchronization code. his
sequence is shared by all cells belonging to
that scrambling code group. SSC is 2' chip
long sequence and there are only %
synchronization Codes. >y arranging them in
di0erent order di0erent sequence could be
ormed.
Primary Common Pilot Cannel !P-CP%CH"
#$
Secondary Common Control Pysical
Cannel!S-CCPCH" #$
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&c'uisition %ndicator Cannel !&%CH"
Pa(in( %ndicator Cannel!P%CH" #$
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&c'uisition %ndicator Cannel !&%CH"
#$
Pa(in( %ndicator Cannel!P%CH" #$
)S8PA pro1ides signifcant enhancements to the 8ownlin= compared
to !?? in
terms o pea= data rate/ cell throughput / and round trip delay.
his is achie1ed
through the implementation p a ast channel control and
allocation mechanism that
employs such as adapti1e (odulation and coding and ast )ybrid
Automatic !epeat
!equest*)A!@+
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)ecnolo(y #o*nlin+ Pea+ #ata
Rate
)y,ical #e,loyment
,lin+ Pea+ #ata Rate
)eoretical Maimum
GS( ?.=bps ?.=bpsGP!S #$=bps %9%=bps78G7 %2$=bps #93=bps!?? C8(A
3"#=bps 2.$(bps)S8PA %$(bps %#.#(bps
%6
)S8PA;
)igh
Speed
8ownlin
= Pac=et
Access
26
&mporta
nt
Beatureso 3GPP
!'
36
)S8PA
is the
solution
oC8(
A
o0ering
highspeed
downlin
= data
ser1ice
#6Pea=
data
rate in
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downlin
= 5
%#.#(bp
s
* physic
allayer +
'6
Shorter
delay
6)igh
downlin
= code
and
power
ecienc
y and
greater
downlin
=
capacity
96
Bleible
cell
resource
allocatio
n
"6(ore
high
speed
user
access
%6
)S8PA>asic
Concept
and
charact
eristic
26-ey
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echniq
ues
D1er1ie
w
36
PhysicalChannel
#6:ew
(AC
7ntity
or
)S8PA
Chip rate o %' time slots ;3"#$$$$chips in %$ms rame
ime period o %' Slots ;%$ms
% Slot time ;%$4%'243ms
Chip rate o % time slot ; 3"#$$$$4%'
; 2'$$ chips
:ow )S8PA has sub rame o 3 slots.
Chip !ate o 3 Slots ; 2'$$
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%'3$ chips42ms
*%'3$
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%m,ro/ed Cell
Ca acit
Eower SB
Hi(er Pea+
#ata Rate
$o*er $atency
Bast E%
)A!@ %m,ro/ed 1oSSu ort
Fast Resource
Scedulin(:ew
Channels
Bast
Scheduling
GS(
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#edicated Pysical Cannel!#P#CH 2
#PCCH" $
#edicated Pysical Cannel!#P#CH
#PCCH" #$
)S8PA
R
)S,PA
R
C8(A
R55
GP!S
78G7
