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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
m !nter"ace and#adio Channels
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Pa e2Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Overview
2. $rocessing o" %oice &ignal
'. #adio Channel
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#adio !nter"ace
Another MSC
HLR/AUC
SMC
PSTN
ISDN
OMC
MS
Um
MS
A-bis
BSC
A
BTS
MSC/VLR
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#adio Access TechnologyTime
.DMA
.re"en'&
TDMATime
.re"en'&
CDMA
.re"en'&
Time
Coe
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#adio Access Technology
Time.DMA
.re"en'&
TDMATime
.re"en'&
CDMA
.re"en'&
Time
Coe
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Contents
(. )verview
2. Processing of Voice Signal
'. #adio Channel
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Voi'e A/DA/D2H3 1!bit S,ee'h
'oin4
S,ee'h
'oin4Se4me
nt%tion
Se4me
nt%tion
0ms
1!(bit/sCh%nne# 'oin4Ch%nne# 'oin4
Inter#e%5in4Inter#e%5in4 B"rst $orm%ttin4B"rst $orm%ttin46n'r&,tion6n'r&,tion
7(bit/s
Mo"#%tionMo"#%tion
!!7(bit/s
Tr%nsmission
%oice &ignal $rocessing
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&peech Coding
The coding mode is called #egular $ulse *+citedLong Term $rediction -#$*LT$.
!t wor/s as "ollow 1H3 o" sampling is per"ormed
4rst, then divided into "rames with 20ms5 every"rame has su7"rames5 the duration o" every su7
"rame is 8ms5 and the pure 7it rate is ('/7it9s.
7/21/2019 OMF000001 Um Interface and Radio Channels ISSUE2.1
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B#o'(
'oer
B#o'(
'oer
68'ite
'oer
68'ite
'oer
90bit
:! ;: = 777 777
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1 ! < 9 > = 777 777
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33 5757 11 2626 11 5757 33
%oice :urst
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Tr%nsmission e#%& t
Tr%nsmission e#%& t
TA
The mobi#e ,hone sho"#
sen the si4n%# in %5%n'e
Timing Advance -TA
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Timing Advance -TA
Tr%nsmission e#%& t
Tr%nsmission e#%& t
TA
The mobi#e ,hone sho"#
sen the si4n%# in %5%n'e
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;re
7/21/2019 OMF000001 Um Interface and Radio Channels ISSUE2.1
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;re
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Prolong battery life andreduce interference
=T>
=T> =iscontinuous Transmission &hut o? the transmission at voice intervals5
)nly transmit &!= "rames@
The transcoder at the #> terminal produces com"orta7le noise.
%A= %oice Activity =etection
!mplemented 7y the transcoder.
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=T>
=T> =iscontinuous Transmission &hut o? the transmission at voice intervals5
)nly transmit &!= "rames@
The transcoder at the #> terminal produces com"orta7le noise.
%A= %oice Activity =etection
!mplemented 7y the transcoder.
Prolong battery life and
reduce interference
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$ower Control
$rolong 7attery li"e #educe networ/ inter"erence
!nclude 7oth uplin/ power control and downlin/ power control
Level and
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Contents
(. )verview
2. $rocessing o" %oice &ignal
3. Radio Channel
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.re"en'&
00(H3
19/>ms
BP
S#it
Time
;rame and Channel
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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
Bro%'%st 'ontro# 'h%nne#
)BCH*Contro# 'h%nne#Common 'ontro# 'h%nne#
)CCCH*
Voi'e 'h%nne#
)TCH*
.CCH SCH BCCH
)s&stem in$orm%tion*
TCH/.ACH RACH SDCCH .ACCH
SACCH
TCH/HPCH
Common 'h%nne#
)CCH*
Dei'%te 'h%nne#
)DCH*
Lo4i'%# 'h%nne#
Logical Channel Type
B&D00 and =C&(100 have the same logical channel category
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FCCH
CH
!CCH
PCH
"#CH
!CCH
CCCH
Common
C$annel
%CCH
"CCH
F"CCH
TCH&F
TCH&H
%CCH
TCH
%edicated
C$annel
=ownlin/ Logical Channel
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=ownlin/ Logical Channel
FCCH
CH
!CCH
PCH
"#CH
!CCH
CCCH
Common
C$annel
%CCH
"CCH
F"CCH
TCH&F
TCH&H
%CCH
TCH
%edicated
C$annel
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'"CH CCCH
Common
c$annel
%CCH
"CCHF"CCH
TCH&F
TCH&H
%CCH
TCH
%edicated
c$annel
plin/ Logical Channel
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plin/ Logical Channel
'"CH CCCH
Common
c$annel
%CCH
"CCHF"CCH
TCH&F
TCH&H
%CCH
TCH
%edicated
c$annel
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se o" Logical Channels
&earch "or "re
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(bit 41 )ync$ronou)bit)
36 encry*ted
bit)3bit 6(+25bit
Tail bit Tail bitGuard interval
Data
Access burst (AB): Used in MS initial access
Guard interval
3bit 142bit 3bit (+25bit
Tail bit Tail bitData
Frequency correction burst (FB): Used in frequency synchronizationbetween MS and BTS
3bit 3, encry*tedbit)
3, encry*ted
bit)3bit (+25bit
Tail bit Tail bit Guard intervalDataData
Synchronous burst (SB): Used in timin synchronization between MS
and BTS
:urst
64 )ync$ronou) bit)
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3bit 142 modulation bit) 3bit (+25bit
Tail bit Tail bit Guard interval
!ummy burst (!B): Used in transmission of fillin frames byBTS at timeslots when there is no information deli"ered
:urst
3bit 57 encry*ted bit) 57 encry*ted bit) 3bit (+25bit
Tail bit Tail bit Guard intervalDataData
26bit1 1
Trainin se!uence
Frame
stealin
fla
#ormal burst (#B): Used to carry the information of the traffic channel and
the control channel e$ce%t for &A'
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26-frame multi-frame
TCH"F#SACCH"F $full%rate TCH&
TCH"H#SACCH"H $'alf%rate TCH&
51-frames multi-frameFCCH#SCH#BCCH#CCCH $main BCCH&
FCCH#SCH#BCCH#CCCH#SDCCH"(#SACCH"( $combined BCCH&
BCCH#CCCH $e)tended BCCH&
SDCCH"*#SACCH"* $main SDCCH&
$hysical Com7ination o" LogicalChannel
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&tructure o" ain :CCH1 multi-frame (1!"#$ %rames& 23.3'ms "ownlin
)rou* )rou*1 )rou*2
)rou*3+
,
(same
as
)rou*2&
)r*u*
Channel % S , C, % S C, C, // % S C, C, 0
%rame
ume
r
1 2- 4-5 11
1
12-
1
14-
152-35
,
,
1
,2-
,
,4-
,5
1 multi-frame (1!"#$ %rames& 23.3'ms 6*lin
Channe
lR R R R R R R R R R R R R R//R R R R R
%rame
ume
r
1 2 3 , 4 7 ' 5 1 11 12 13-,4 ,7,
'
,
5
F-FCCH. -CH. !-!CCH. C-CCCH. /-/%. '-'"CH
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&tructure o" Com7ined
:CCH1 multi-frame (1!"#$ %rames& 23.3'ms "ownlin
)rou* )rou*1 )rou*2 )rou*3 )rou*, )r*u*
Channel % S
8
,
C
8
,
% S
C
8
,
C
8
,
% S
"
8
,
"
1
8
,
% S
"
2
8
,
"
3
8
,
% S
$
8
,
$1
8
,
0
Channel % S
8
,
C
8
,
% S
C
8
,
C
8
,
% S
"
8,
"
1
8,
% S
"
2
8,
"
3
8,
% S
$2
8
,
$3
8
,
0
%rame
umer 1
2-
4-
51 11
12
-
1
14
-
15
2 21
22
-
2
24
-
25
3 31
32
-
3
34
-
35
, ,1
,2
-
,
,4
-
,5
1 multi-frame (1!"#$ %rames& 23.3'ms 6*lin
Channel "38, R R $28, $38, R//R "8, "18, R R "28,
Channel "8, R R $8, $18, R//R "8, "18, R R "28,
%rame
umer-3 , 4-5 1-13 1,-34 37-, ,1-,, , ,4 ,7-
F-FCCH. -CH. !-!CCH. C-CCCH. %-%CCH +"-"CCH. /-/%. '-'"CH
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&tructure o" Logical ChannelCom7ination ;rameain &=CCH
1 multi-frame (1!"#$ %rames& 23.3'ms "ownlin
Channel"
8,
"1
8,
"2
8,
"3
8,
",
8,
"
8,
"4
8,
"7
8,
$
8,
$1
8,
$2
8,
$3
8,0 0 0
Channel"
8,
"1
8,
"2
8,
"3
8,
",
8,
"
8,
"4
8,
"7
8,
$,
8,
$
8,
$4
8,
$7
8,0 0 0
%rame
umer-3 ,-7
'-
11
12-
1
14-
15
2-
23
2,-
27
2'-
31
32-
3
34-
35
,-
,3
,,-
,7
,
'
,
5
1 multi-frame (1!"#$ %rames& 23.3'ms 6*lin
Channel$
8,
$4
8,
$7
8,0 0 0
"
8,
"1
8,
"2
8,
"3
8,
",
8,
"
8,
"4
8,
"7
8,
$
8,
Channel $18,
$28,
$38,
0 0 0 "8,
"18,
"28,
"38,
",8,
"8,
"48,
"78,
$,8,
%rame
umer-3 ,-7
'-
1112 13 1,
1-
1'
15
-
22
23-
24
27-
3
31-
3,
3-
3'
35-
,2
,3-
,4
,7-
%-%CCH. "-"CCH. /-/%
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&tructure o" Logical ChannelCom7ination ;rameTCH
T-TCH."-"CCH. /-/%
1 multi-frame (24!"#$ %rames& 12ms
Channel ! ! ! ! ! ! !/! $ !+++! ! ! ! ! ! ! 0
%rame
umer 1 2 3 ,
4/
1112
13/
1'15 2 21 22 23 2, 2
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0 1 2 3 2044 2045 204 204!
0 1 2 3 4" 4# 504!
0 1 24 25
0 1 24 25 1 4# 500
0 1 4 5 !2 3
T$
3
T$
3
%&
"'25T$ Tail bitT$
3T$3
%&"'25
%& %uard eriodT$3
T$3
%&"'25
T$3
T$3
%& "'25
5" in*ormation bits2 training
se+uences5" in*ormation bits
Constant bit 142
In*ormation bit 3# ,-tended training se+uence 4 In*ormation bit 3#
.ync/ronous se+uence 41 In*ormation bit 3
ormal burst ($)
Fre!uenc, correction burst $FB&
.ync/ronous burst (.$)
Access burst (A$)
- ',.er frame/01(* su.er%frames/02-34(*TD5A frames $6 'ours7 0* minutes7 36 seconds and 241 milliseconds&
1 suer*rame132TMA *rames ('12 seconds)
1 multi*rame2TMA *rames (120ms) 1 multi*rame51TMA *rames (30013ms)
1TMA *rame" timeslots (12024'15ms)
1 timeslot15'25 bit duration (1520'5!!ms)(1 bit duration 4"133'"us)
$CCCCC.CC
TC.ACCT6ACC
;rame
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0 1 2 3 2044 2045 204 204!
0 1 2 3 4" 4# 504!
0 1 24 25
0 1 24 25 1 4# 500
0 1 4 5 !2 3
T$
3
T$
3
%&
"'25
T$ Tail bitT$3
T$3
%&"'25
%& %uard eriodT$3
T$3
%&"'25
T$3
T$3
%& "'25
5" in*ormation bits
2 training
se+uences 5" in*ormation bits
Constant bit 142
In*ormation bit 3#,-tended training
se+uence 4 In*ormation bit 3#
.ync/ronous se+uence 41 In*ormation bit 3
ormal burst ($)
Fre!uenc, correction burst $FB&
.ync/ronous burst (.$)
Access burst (A$)
- ',.er frame/01(* su.er%frames/02-34(*TD5A frames $6 'ours7 0* minutes7 36 seconds and 241 milliseconds&
1 suer*rame132TMA *rames ('12 seconds)
1 multi*rame2TMA *rames (120ms) 1 multi*rame51TMA *rames (30013ms)
1TMA *rame" timeslots (12024'15ms)
1 timeslot15'25 bit duration (1520'5!!ms)
(1 bit duration 4"133'"us)
$CCCCC.CC
TC
.ACCT6ACC
;rame
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PCH RACHACH
Do+n#in( CCCH U,#in( CCCH
Ho+ to etermine the tot%# CCCH reso"r'es o$ the 'e##E Ho+ to
%##o'%te ACH %n PCH re%son%b#&E
Con4guration o" Common ControlChannel
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CCCH Brouping
The B& system supports various /inds o" channelcom7inations -B$#& not ta/en into account, in
which the main :CCH, e+tended :CCH, com7ined
:CCH, and the :CCHC:CH com7ination contain the
CCCH, i.e. all o" the "our com7inations support the
& access. The & are distri7uted to di?erent CCCH
groups 7ased on this "act.
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CCCH Brouping
The B& speci4es that the CCCH can 7e mapped totimeslots 0, 2, and 6 7ut the e+tended :CCH
com7ination can only 7e mapped to timeslots 2,
and 6 7ecause it does not contain ;CCH and &CH.
There"ore, all & synchroniEe with the 7ase station
at timeslot 0 and access the networ/ via di?erent
CCCH.
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$aging Broup
The B& system supports a ma+imum o" DDI1(paging groups. the & can 7e divided into 1( su7
groups at most "rom the opinion o" the paging group.
Jo matter what com7ination mode is adopted, the
num7er o" 7loc/s used "or paging in every 8( multi
"rame does not e+ceed D. The system ena7les the 8(
multi"rame to cycle again , with a
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$aging Broup
!n B& terms, the paging 7loc/ in any 8( multi"rameis called a paging supergroup. There"ore, the
num7er o" paging super"rames in the system is the
Knum7er o" "rames o" the same paging. The num7er
o" paging groups in each supergroup is -D or ' M
Knum7er o" access granted reserved 7loc/s.
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Nuestions
Fhat@s the rate o" voice coding O Fhat are the advantages o" discontinuous
transmission -=T>O
Fhat types o" logical channels are thereO
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