IS95 Introduction

7/21/2019 IS95 Introduction

1/71

An Introduction to CDMA Air Interface:TIA/EIA/IS-95A

Advanced Technology Center

Computer & Communications Research Laboratories

Industrial Technology Research InstituteRay-Guang Cheng

[email protected]


2/71

Chung-Wei Ku

ATC/CCL/ITRI

Advanced Technology CenterComputer & Communications Research LaboratoriesIndustrial Technology Research Institute

Contents

Introduction

Forward CDA Channel

Reverse CDA Channel


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Chung-Wei Ku

ATC/CCL/ITRI


CDA Around the !orld


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Chung-Wei Ku

ATC/CCL/ITRI


ultiple Access

FDA

" Advanced obile #hone $ervice %A#$ and Total Access

Communications $ystem %TAC$

" A#$ systems use '( )*+ ,slices, o- spectrum -or each channel

" .arrowband A#$ %.A#$ re/uires only 0( )*+ per channel" TAC$ channels are 12 )*+ wide

TDA

" I$324 systems5 designed to coe6ist with A#$ systems5 divide '( )*+ o-

spectrum into three channels

" #DC divides 12 )*+ slices o- spectrum into three channels" 7$ systems create 8 time3division channels in 1(( )*+ wide carriers


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Chung-Wei Ku

ATC/CCL/ITRI


ultiple Access

CDA

" uni/ue digital codes are used to di--erentiate subscribers

" codes are shared by both $ and 9$

" all users share the same range o- radio spectrum

9ene-its o- CDA:" Capacity increases: 8 to 0( times %A#$; 4 to 2 times %7$

" Improved call /uality

" $impli-ied system planning

"


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Chung-Wei Ku

ATC/CCL/ITRI


CDA

There are two CDA common air inter-ace standards:" Cellular %81438=4 *+ 3 TIA>I$3=2A

" #C$ %082(30==( *+ 3 A.$I ?3$TD3((8

They are very similar in their -eatures5 with e6ceptions o- the

-re/uency plan5 mobile identities5 and related message -ields@ I$3=2A

" 42 *+ spacing -or -orward & reverse channel

" #ermissible -re/uency assignments are on '( )*+ increments

" !>R 0( log %0@1188 *+>=B((*+ 10 d9 -or the =B(( bps rate set

A.$I ?3$TD3((8" 8( *+ spacing -or -orward & reverse channel

" #ermissible -re/uency assignments are on 2( )*+ increments


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Chung-Wei Ku

ATC/CCL/ITRI


Fre/uency #lan o- I$3=2A


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Chung-Wei Ku

ATC/CCL/ITRI


Fre/uency #lan o- A.$I ?3$TD3((8


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Chung-Wei Ku

ATC/CCL/ITRI


Forward CDA Channel o- I$3=2A

From 9$$ to $

It carries tra--ic5 a pilot signal5 and overhead in-ormation@

#ilot is a spread but unmodulated D$$$ signal@

#ilot and overhead channels establish the system timing and

station identity@

#ilot channel is also used in the mobile3assisted hando--

%A* process as a signal strength re-erence@

F1 and the #. rate is 0@1188 *+ %0@1188

*+ 018=B(( bps@


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Chung-Wei Ku

ATC/CCL/ITRI


Forward Lin) Channel #arameters

Channel $ync #aging Tra--ic

Data rate 01(( 48(( =B(( 01(( 14(( 48(( =B(( bps

Code repetition 1 1 0 8 4 1 0

odulationsymbol rate 48(( 0=51(( 0=51(( 0=51(( 0=51(( 0=51(( 0=51(( sps

#. chips>modulation symbol 12B B4 B4 B4 B4 B4 B4

#. chips>bit 0(14 12B 018 0(14 201 12B 018


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Chung-Wei Ku

ATC/CCL/ITRI


$ignal $tructure

The -orward lin) consists o- up to B4 logical channels %code

channels@

Code channels is one o- a set o- B4 so3called !alsh -unctions@

nly whole periods o- the !alsh -unctions occur in each code

symbol5 the !alsh ma)es the channels completely separable inthe receiver@


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Chung-Wei Ku

ATC/CCL/ITRI


verhead Channels

There are three types o- overhead channel in the -orward lin):

" pilot5 is re/uired in every station

" sync

" paging

#ilot channel" pure short code with no additional cover or in-ormation content

" always code channel +ero

" a demodulation re-erence -or the mobile receivers and -or hando-- level

measurements

" carries no in-ormation" all stations use the same short code5 distinguished by the phase

" period o- the short code5 102 1B@BBG ms at the 0@1188 *+ chip rate


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Chung-Wei Ku

ATC/CCL/ITRI


verhead Channels

#ilot channel %Conti@

" pilot phases always be assigned to stations in multiples o- B4 chips5

giving a total o- 1023B 201 possible assignments

" =3bit number that identi-ies the pilot phase assignment is called the Pilot

Offet

$ync Channel

" sync channel carries timing and system con-iguration in-ormation

" data rate is always 01(( bps

" interleaver period is also 8(>' 1B@BBG ms5 simpli-ies -inding -rame

boundaries5 once the mobile has located the pilot" code period ambiguity is then resolved by the long code state and system

time -ields


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Chung-Wei Ku

ATC/CCL/ITRI


verhead Channels

#aging channel

" used to communicate with $s when they are not assigned to a tra--ic

channel

" success-ul accesses are normally -ollowed by an assignment to a

dedicated tra--ic channel

" paging channel may run at either 48(( or =B(( bps

" each 9$ must have at least one paging channel per sector5 on at least one

o- the -re/uencies in use


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Chung-Wei Ku

ATC/CCL/ITRI


Tra--ic Channel

Tra--ic channels

" assigned dynamically5 in response to $ accesses5 to speci-ic $

" always carries data in 1( ms -rames

" carry variable rate tra--ic -rames5 either 05 0>15 0>45 or 0>8 o- =B(( bps

" rate variation is accomplished by 05 15 45 or 83way repetition o- codesymbols5 but the energy per bit appro6imately constant

" rate is independently variable in each 1( ms -rame

" the 8(( bps reverse lin) power control subchannel is carried on the

tra--ic channel by puncturing 1 -rom every 14 symbols transmitted@

Timing" all base stations must be synchroni+ed within a -ew microseconds


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse CDA Channel o- I$3=2

From $ to 9$$

It carries tra--ic and signaling in-ormation@

F'5 the code symbol rate 1858(( symbols>sec5

B code symbols>modulation symbol5 and the #. rate is 0@1188

*+ modulation is B43ary orthogonal !alsh -unctions5 each period o-

the !alsh -unction is repeated -or -our chips o- the #. code

!alsh symbol rate is 0@1188 *+>%4 chips per !alsh chip>%B4

!alsh chips per !alsh symbol 458(( modulation symbols>second


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse CDA Channel #arameters5 Rate $et 0

Channel Access Tra--ic

Data rate 458(( 051(( 154(( 458(( =5B(( bps

Code Rate 0>' 0>' 0>' 0>' 0>'

$ymbol Ratebe-ore Repetition 0454(( '5B(( G51(( 0454(( 1858(( sps$ymbol Repetition 1 8 4 1 0

$ymbol Rate a-ter Repetition 1858(( 1858(( 1858(( 1858(( 1858(( sps

Transmit Duty Cycle 0 0>8 0>4 0>1 0

Code $ymbols>odulation $ymbol B B B B B

#. Chips>odulation $ymbol 12B 12B 12B 12B 12B

#. chips transmitted>bit 12B 018 018 018 018


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Chung-Wei Ku

ATC/CCL/ITRI


$ignal $tructure

Reverse CDA Channel consists o- 1 4130logical channels

ne o- the logical channel is permanently and uni/uely

associated with each $@ The channel does not change upon

hando--@

Reverse lin) addressing is accomplished through manipulation o-period 1 4130Long Code5 which is part o- the spreading process@

The reverse CDA Channel does not use strict orthogonality in

any sense to separate logical channels@ Rather5 it uses a very long

period spreading code5 in distinct phases@ The correlations

between stations are not +ero5 but they are acceptably small@


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Chung-Wei Ku

ATC/CCL/ITRI


*ando--

CDA is speci-ically designed not only to reduce hando--

-ailures but also to provide seamless service@


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Chung-Wei Ku

ATC/CCL/ITRI


*ando--

$teps in a hando--

" $tarting in a state where only one cell is supporting the call in /uestion@

" In-orming the candidate cell o- the imminent hando--

" $ignaling the mobile to begin e6ecuting the hando--@

" .ew cell beginning to service the mobile" obile beginning to use the new cell

"


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Chung-Wei Ku

ATC/CCL/ITRI


A#$ v@s@ CDA

Di--erence between A#$ & CDA

" CDA hando--s do not normally re/uire -re/uency tuning@

" CDA re/uires change o- the code channel in the -orward CDA channel@

" .o tuning5 either -re/uency or code channel is re/uired in the reverse

CDA channel at any time@

A#$

" *ard hando-- %communication is interrupted brie-ly

" not simultaneous communication with more than one 9$

" 9$ do the signal /uality measurement


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Chung-Wei Ku

ATC/CCL/ITRI


CDA #rotocol

Hpper Layers

%#rimary Tra--ic

Hpper Layers

%$econdary Tra--ic

Layer 1

%#rimary Tra--ic

Layer 1

%$econdary Tra--ic

Layer 1

%$ignaling

ultiple6 $ublayer %Tra--ic Channel

Layer 1

%Lin) Layer

#aging & Access

Channels

Layer 1

$ync

Channels

Layer ' %obile $tation Control #rocesses

Layer 0 %#hysical Layer


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Chung-Wei Ku

ATC/CCL/ITRI


ultiple6 ption In-ormation

Format 9its #rimaryTra--ic

$ignalingTra--ic

$econdaryTra--ic

TransmitRate%bps&

i6edode % &

Tra--icType %TT &

Tra--icode

% T &9its>-rame 9its>-rame 9its>-rame

( 3 3 0G0 ( (

0 ( (( 8( 88 (

0 ( (0 4( 018 (

0 ( 0( 0B 021 (

0 ( 00 ( 0B8 (

0 0 (( 8( ( 88

0 0 (0 4( ( 018

0 0 0( 0B ( 021

=B((

0 0 00 ( ( 0B8

48(( 3 3 3 8( ( (

14(( 3 3 3 4( ( (

01(( 3 3 3 B ( (

Format 9its #rimaryTra--ic

$ignalingTra--ic

$econdaryTra--ic

TransmitRate%bps&

i6edode % &

Tra--icType %TT &

Tra--icode

% T &9its>-rame 9its>-rame 9its>-rame

( 3 3 0G0 ( (

0 ( (( 8( 88 (

0 ( (0 4( 018 (0 ( 0( 0B 021 (

0 ( 00 ( 0B8 (

0 0 (( 8( ( 88

0 0 (0 4( ( 018

0 0 0( 0B ( 021

=B((

0 0 00 ( ( 0B8

48(( 3 3 3 8( ( (

14(( 3 3 3 4( ( (01(( 3 3 3 B ( (


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Chung-Wei Ku

ATC/CCL/ITRI


#rimary and $ignaling Tra--ic

!!

"#

!!

"$

!!

"$

!!

"$

!!

"$

TT

"#

TT

"#

TT

"#

TT

"#

T!

"##

T!

"#$

T!

"$#

T!

"$$

Pri%ary Traffic " $&$ 'it

Pri%ary Traffic

" (# 'it

)ignaling Traffic

" (( 'it

Pri%ary Traffic

" *# 'it

)ignaling Traffic

" $+( 'it

Pri%ary Traffic

" $, 'it

)ignaling Traffic

" $+ 'it

)ignaling Traffic " $,( 'it

Pri%ary Traffic " (# 'it

Pri%ary Traffic " *# 'it

Pri%ary Traffic " $, 'it

,## ' Pri%ary

Traffic only

0i% 1 2urt with rate $/+

ri%ary 1 ignaling traffic

0i% 1 2urt with rate $/*

ri%ary 1 ignaling traffic

0i% 1 2urt with rate $/(ri%ary 1 ignaling traffic

2lan3 1 2urt with

ignaling traffic only

*(## ' ri%ary

traffic only

+*## ' ri%ary

traffic only

$+## ' Pri%ary

traffic only

$&+ 'it

(# 'it

*# 'it

$, 'it


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Chung-Wei Ku

ATC/CCL/ITRI


$econdary Tra--ic

!!

"$TT

"$

T!

"##

Pri%ary Traffic

" (# 'it

)ignaling Traffic

" (( 'it

!!

"$TT

"$

T!

"#$

Pri%ary Traffic

" *# 'it

)ignaling Traffic

" $+( 'it

!!

"$TT

"$

T!

"$#

Pri%ary Traffic

" $, 'it

)ignaling Traffic

" $+ 'it

!!

"$TT

"$

T!

"$$)ignaling Traffic " $,( 'it

0i% 1 2urt with rate

$/+ ri%ary 1

)econ4ary traffic


$/* ri%ary 1

)econ4ary traffic


$/( ri%ary 1

)econ4ary traffic

2lan3 1 2urt with

)econ4ary traffic only

$&+ 'it


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Chung-Wei Ku

ATC/CCL/ITRI


$ync Channel

$ignaling on all channels use a synchroni+ed bit3orientedprotocol@

$ync channel is used during the system ac/uisition stage@

$ync channel -rame length is the length o- pilot #. se/uence@

nly the )ync Channel !eageis sent on the sync channel@

$

" obtains in-ormation -rom )ync Channel !eage

" adusts its timing to normal system timing

" begins monitoring itsPaging Channel


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Chung-Wei Ku

ATC/CCL/ITRI


#aging Channel

Data rate: 14((5 48((5 =B(( bps

ne =B(( bps #aging Channel can support 08( pages>sec@

#aging Channel conveys -our maor types o- messages:

" overhead

"paging

" order

" channel assignment

Con-iguration o- the system is conveyed in -our overhead messages:

" $ystem #arameter essage

" Access #arameter essage" .eighbor List essage

" CDA Channel List essage


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Chung-Wei Ku

ATC/CCL/ITRI


verhead essages

$ystem #arameter essage:" con-iguration o- the #aging Channel

" registration parameters

" parameters to aid pilot ac/uisition

Access #arameter essage

" con-iguration o- the Access Channel" control parameters used to stabili+e the Access Channel

.eighbor List essage

" time o--set o- the pilot

" basic neighbor con-iguration

CDA Channel List essage

" CDA -re/uency assignment that contain #aging Channels


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Chung-Wei Ku

ATC/CCL/ITRI


#aging Channel essages

#age essage:" contains pages to one or more mobile stations@

rder essage:

" a broad class o- messages used to control a particular $@

Channel Assignment essage:" let 9$ to assign a $ to the tra--ic channel

" change #aging Channel Assignment

" direct the $ to use the analog F system


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel

Access Channel provides communications -rom $ to 9$ when$ is not using a Tra--ic Channel@

All Access Channel use 48(( bps mode

Access Channel essage:

" call origination" response to pages

" orders

" registrations

ne or more Access Channel are paired with every #aging Channel

Control o- Access Channel transmission is accomplished through

the Access #arameter essage sent on the #aging Channel


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Chung-Wei Ku

ATC/CCL/ITRI


Framing and $ignaling on the Tra--ic Channel

9oth -orward & reverse Tra--ic Channels use 1( ms -rames@

Frames can be sent at =B((5 48((5 14((5 or 01(( bps

$ignaling

" blan)3and3burst signaling:

sent at =B(( bps replace one or more -rames o- primary tra--ic data

" dim3and3burst signaling:

sent at =B(( bps

sends both signaling and primary tra--ic data in a -rame

degradation in voice /uality is essentially undetectable


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Chung-Wei Ku

ATC/CCL/ITRI


Tra--ic Channel essages & $ervice ption

Four types o- control messages on the Tra--ic Channel" messages controlling the call itsel-

" messages controlling hando--

" messages controlling -orward lin) power

" messages -or security and authentication

I$3=2 supports di--erent user applications5 called service options

Two di--erent service options can be simultaneous supported:

" primary tra--ic

" secondary tra--ic

$ can speci-y the desired service option at call origination@


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Chung-Wei Ku

ATC/CCL/ITRI


I$3=2 $tandard

Forward Lin)" #ilot Channel

" $ync Channel

" #aging Channels %ma6@ G

" Tra--ic Channels

#ower Control $ub3Channel

Reverse Lin)

" Access Channels

" Tra--ic Channels


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Chung-Wei Ku

ATC/CCL/ITRI


Forward CDA Channel

Forward lin) consists o- up to ,*logical channels %code channels The code channels are distinguished by a set o- B4 Walh

function

!alsh -unction code number +ero is always reserved as theilot

)hort Co4e %withperiod 1025 1G@BBG ms at 0@1188 *+

" spreading the CDA Forward Channel

" used in conunction with theLong Co4e-or spreading the CDA Reverse

Channel

Long Co4e %withperiod 141 3 0

" spreading the CDA Reverse Channel" Long Co4e !a3serves as a reverse lin) address


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Chung-Wei Ku

ATC/CCL/ITRI


7eneration o- Forward Code Channel


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Chung-Wei Ku

ATC/CCL/ITRI


Forward Channel odulator %$preading

Identical I5 E signals; but di--erent I5 E #. se/uences %short code Transmitted power is reduced by '5 B5 or = d9 -or variable data

rates at =@B )5 4@8 )5 1@4 )5 and 0@1 )bps

E#$ modulation


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Chung-Wei Ku

ATC/CCL/ITRI


Forward Lin) odulation #arameters

B4 othoronal !alsh codes per sector to identi-y channels" %$>. is not in-inite due to A!7.5 multipath5 and the neighboring cell

Long code %period 1 4130 to scramble data

D$ at 0@1188 cps


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Chung-Wei Ku

ATC/CCL/ITRI


Logical Forward CDA Channel

Forward CDA Channel

#ilot

Chan

$ync

Chan

!( !'1

#aging

Ch 0

!0

@@@Hp

to !G

#aging

Ch G

!8

@@@Hp

to

Tra--ic

Ch .

Tra--ic

Ch 0

Tra--ic Data obile #owerControl $ub3Channel

@@@

!'0

Tra--ic

Ch 14Hp

to

@@@

!B'

Tra--ic

Ch 22

!''

Tra--ic

Ch 12


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Chung-Wei Ku

ATC/CCL/ITRI


#ilot Channel

Hnmodulated signal Hni/ue per sector>cell

$ignal level is 4KB d9 higher than tra--ic channel

#er-ect phase>time>signal strength re-erence -or $

Hsed in initial system ac/uisition and hando-- -or $

#ilotChannel

%All (s

!alsh

Function

!(

#. Chips

0@1188 cps


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Chung-Wei Ku

ATC/CCL/ITRI


$ync Channel

01(( bps To convey pilot #. se/uence o--set5 time o- day5 and long code

state to allow immediate sync o- $ to the networ)

$ync

Channel

9its 0@1 )bps

Convolutional

15 =

Code

$ymbol

1@4 )sps

$ymbol

Repetition

9loc)

Interleaver

odulation

$ymbol

4@8 )sps

odulation

$ymbol

4@8 )sps

!alsh

Function

!'1

#. Chips

0@1188 cps


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Chung-Wei Ku

ATC/CCL/ITRI


$ync Channel Frame $tructure

$ync channel message has length o- =' 6 . bits

$ent in . super-rames:

" 0 super-rame %=B bits5 8( ms ' sync channel -rames

" 0 -rame %'1 bits5 1B@BG ms 03bit $ J '03bit data

" $ 0 : start o- message

essage contains:

" system identi-ication %$ID and networ) identi-ication %.ID

" #. se/uence o--set and long code state" system time5 leap seconds5 o--set -rom HTC5 etc@

" paging channel data rate

essage

Length

%in bytes

8 bits

Data

. $7 1 K 004B bits

CRC

'( bits

#adding

M(((@@@


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Chung-Wei Ku

ATC/CCL/ITRI


#aging Channels

4@8 ) or =@B ) bps $ame time alignment as the tra--ic channels

To page $ and to process other orders

#aging

Channel

9its 4@8 )bps

or

=@B )bps

Convolutional

15 =

Code$ymbol

=@B )sps

or

0=@1 )sps

$ymbol

Repetition

9loc)

Interleaver

odulation$ymbol

0=@1 )sps

odulation$ymbol

0=@1 )sps

!alsh

Function

! p

0 p G

#. Chips0@1188 cps

Long Code

as) -or#aging

Channel p

Long Code7enerator0@1188 cps

Decimator

0=@1 )sps

0=@1 )sps


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Chung-Wei Ku

ATC/CCL/ITRI


#aging Channel Frame $tructure

$ynchroni+ed paging channel message has length o- 4G 6 . or =2 6 . bits

$ent in . paging channel slots:

" 0 slot %8( ms 8 paging channel hal-3-rames" 0 hal-3-rame %0( ms5 48 or =B bits 03bit $CI J 4G %or =23bit data

" $CI 0 : start o- a paging channel message

essage contains:

" system parameters

" access parameter %-or access channel" channel assignment

" T$I %temporary $ identi-ication assignment

essage

Length

%in bytes

8 bits

Data

. $7 1 K 004B bits

CRC

'( bits

#adding

M(((@@@


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Chung-Wei Ku

ATC/CCL/ITRI


Forward Tra--ic Channel Frame $tructure

8

T

01

F

0G1

in-ormation bits

0=1 bits %1( ms=B(( bps

Frame

8

T

8

F

8(

in-ormation bits

=B bits %1( ms48(( bps

Frame

8

T

8

F

4(

in-ormation bits

48 bits %1( ms14(( bps

Frame

8

T

8

F

0B

in-ormation bits

14 bits %1( ms01(( bps

Frame

F: Frame Euality Indicator %CRC

T:


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Chung-Wei Ku

ATC/CCL/ITRI


Forward Tra--ic Channel Frame $tructure

For signaling

essage

Length

%in bytes

8 bits

Data

. $7 0B K 00B( bits

CRC

0B bits

#adding

M(((@@@


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Chung-Wei Ku

ATC/CCL/ITRI


Logical Reverse CDA Channel

Reverse CDA Channel

Access

Ch 0

Access

Ch n@@@Tra--ic

Ch 0

Tra--ic

Ch m

Address by Long Code #.s

n '1 mB1

M


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channels

To access the system5 respond the page5 ma)e call originationand process other messages between the $ and the 9$

4@8 )bps slotted random access channel

$ is identi-ied by orthogonal o- long codeAccess

ChannelIn-ormation

9its

%88 bits>-rame4@4

)bps

Convolutional

'5 =

Code$ymbol

04@4

)sps

$ymbol

Repetition

9loc)

Interleaver

odulator

$ymbol

%!alsh chip

#. Chips 0@1188 cps

Add 83bit


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Chung-Wei Ku

ATC/CCL/ITRI


Long code mas) contents

$$###$$$$Acce Channel

5u%'er

Paging Channel

5u%'er

2ae )tation

I4entification

Pilot Offet for the

6orwar4 Channel

$$###$$### Per%ute4 7)5

Acce Channel Long Co4e !a3

Re8ere Traffic Channel Pu'lic Long Co4e !a3

*$ 99 9+ +( +& + +* ( #

*$ 9+ 9$ #

7)5":79$; 79#; 7+; 7+(; 7+&; 7+,; 7+; < ; 7+; 7$; 7#=

Per%ute4 7)5":7#; 79$; 7++; 7$9; 7*; 7+,; 7$&; 7(; 79#; 7+$; 7$+; 79; 7+; 7$,;

7&; 7+; 7+#; 7$$; 7+; 7+*; 7$; 7,; 7+(; 7$; 7$#; 7$; 7+9; 7$*;

7; 7+&; 7$(; 7=


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel

Acce

Channel

Is used by the $ to initiate communication with the 9$ & to respond to#aging Channel message

Fi6ed data rate %48(( bps & 1( ms -rame duration

Acce Channel !eage %ay carryOrigination of a call > Paging reone

Or4er reone > 0ata 'urtAc3nowle4ge%ent to Paging Channel %eageRegitration

Infor%ation 2it " (( 'it7nco4er Tail

( 'it

, 'it :+# %=

2aic fra%e tructure


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel Frame $tructure

Access channel message has length o- 88 6 . bits

Access channel slot is as

" Access channel -rame 883bits J 83bit tail bits %all (s" The value o- #AO$P and ANOCA#O$P are received on the paging

channel

essage

Length

%in bytes

8 bits

Data

. $7 1 K 841 bits

CRC

0B bits

#adding

M(((@@@

Access Channel #reamble (((M(((

=B 6 %0J#AO$P bits

Access Channel Frame

=B bits

@@@ Access Channel Frame

=B bits

=B 6 %4J#AO$PJANOCA#O$P bits


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel $lot $tructure

Acce Channel

)lot )tructure

Is %'JANOCA#O$PJ%0J#AO$P Access Channel -rames in length

An Acce Channel lot 'egin 1 en4 on an Acce Channel fra%e

'oun4ary.Acce Channel lot 'egin at Acce Channel fra%e in which

t %o4 :*?!ACAP)B?PA!)B="# 1 t yte% ti%e in fra%e

Prea%'le !aD Caule )iEe

Acce Tran%iion

!aD Length

Acce )lot

2oun4ary+# %

Acce channel fra%e

Acce channel lot of fi8e

+# % Acce Channel fra%e

Acce )lot n Acce )lot n?$ Acce )lot n?+


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel $tructure

Acce Channel )lot

AC6ra%e

AC6ra%e

AC6ra%e

AC6ra%e

AC6ra%e

Acce Channel Prea%'le AC2o4y

AC2o4y

AC2o4y

T T T

Acce Channel !eage Caule

Acce Channel !eage Pa44ing

!)GLength

!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it

(!)GLength 'it A Reuire4

(( 5f 'it

5f fra%e", 5f 'it$? PA!)B fra%e", :$? PA!)B='it

+# % " , 'it

#.#+ :*?PA!)B?!ACAP)B= ec " , :*?PA!)B?!ACAP)B= 'it

AC fra%e " Acce Channel fra%e

5f 5u%'er of Acce Channel fra%enee4e4 for %eage tran%iion

T 7nco4er Tail 'it


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Chung-Wei Ku

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Access Channel -ield %$7OLength & CRC

Acce Channel fiel4

:!)GLength 1 CRC=



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength

The !) et the fiel4 of to the length of the %eage in octet; inclu4ing

the !)GLength; the %eage 'o4y 1 the CRC.The fiel4 hall 'e ( 'it in length; 1 the !) hall li%it the %aDi%u%

Acce Channel length to $$# octet or ((# 'it

The CRC inclu4e the !)GLength 1 the %eage 'o4y.

The generator olyno%ial for the CRC i

g:D="9#?+?+$?+#?$?$9?$+?$$?(?&?,?+?$


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield %essage 9ody

Acce Channel fiel4

:!eage 2o4y=



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength

!eage TyeCo%%on Layer + 1

I4entification fiel4

Co%%on Authentication

fiel4

Reer8e4 or other

a nee4e4

Regitration !eage " H#######$Or4er !eage " H######$#0ata 2urt !eage " H######$$Origination !eage " H#####$$#Page Reone !eage " H#####$#$Authentication Challenge Reone !eage " H#####$$#

A Ch l -i ld % 9 d


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Chung-Wei Ku

ATC/CCL/ITRI



Acce Channel fiel4

:!eage 2o4y=



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

ACK)7J Ac3nowle4ge%ent )euence 5u%'er > !)G)7J !eage )euence 5u%'erACKR7J Ac3nowle4ge%ent Reuire4 In4icator > ALI0ACK ali4 Ac3nowle4ge%ent In4icator

ACKTP7 Ac3nowle4ge%ent A44re Tye > !)I0TP7 !) I4entifier fiel4 tye!)I0L75 !) I4entifier fiel4 length > !)I0 !) I4entifier

( fiel4

A Ch l -i ld % 9 d


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Chung-Wei Ku

ATC/CCL/ITRI



Acce Channel fiel4

:!eage 2o4y=



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

AMTN!O07 Authentication %o4e

AMTNR Authentication 4ata

RA50C Ran4o% Challenge 8alue

COM5T Call hitory ara%eter

* fiel4

A Ch l -i ld R i t ti


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield: Registration essage

Acce Channel fiel4

Regitration

!eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

#######$

Regitration !eageRegitration !eage

ACK)7J

:9 'it=

!)G)7J

:9 'it=

ACKR7J

:$ 'it=

ALI0ACK

:$ 'it=

ACKTP7

:9 'it=

!)I0TP7

:9 'it=

!)I0L75

:* 'it=

!)I0

:(!)I0L75=

AMTN!O07

:+ 'it=

AMTNR

:# or $( 'it=

RA50C

:# or ( 'it=

COM5T

:# or , 'it=

R7GTP7

:* 'it=

)LOTCCL7

I507:9 'it=

!O2PR7

:( 'it=

)C!

:( 'it=

!O2T7R!

:$ 'it=

Reer8e4

:, 'it=

A Ch l -i ld d


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield: rder essage

Acce Channel fiel4

Or4er !eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

######$#

Or4er !eageOr4er !eage

ACK)7J

:9 'it=

!)G)7J

:9 'it=

ACKR7J

:$ 'it=

ALI0ACK

:$ 'it=

ACKTP7

:9 'it=

!)I0TP7

:9 'it=

!)I0L75

:* 'it=

!)I0

:(!)I0L75=

Re8ere4

:+ 'it=

Or4er

:, 'it=

A00R

R7COR0L75

:9 'it=

Or4er-ecific

fiel4 if ue4

:( A44recor4len 'it=

Reer8e4

: 'it=

0oe 5OT ha8e Thi 6iel4

A Ch l -i ld D t 9 t


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield: Data 9urst essage

Acce Channel fiel4

0ata 2urt !eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

######$$

0ata 2urt !eage0ata 2urt !eage

ACK)7J

:9 'it=

!)G)7J

:9 'it=

ACKR7J

:$ 'it=

ALI0ACK

:$ 'it=

ACKTP7

:9 'it=

!)I0TP7

:9 'it=

!)I0L75

:* 'it=

!)I0

:(!)I0L75=

AMTN!O07

:+ 'it=

AMTNR

:# or $( 'it=

RA50C

:# or ( 'it=

COM5T

:# or , 'it=

!)G

5M!27R

:( 'it=

2urtTP7

:, 'it=

5M!!)G)

:( 'it=

)5M!6I7L0

:( 'it=

CNARi

:( 'it=

Access Channel -ield: rigination essage


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield: rigination essage

Acce Channel fiel4

Origination !eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

#####$##

Origination !eageOrigination !eage

ACK)7J:9 'it= !)G)7J:9 'it= ACKR7J:$ 'it= ALI0ACK:$ 'it= ACKTP7:9 'it= !)I0TP7:9 'it= !)I0L75:* 'it= !)I0:(!)I0L75=

AMTN!O07

:+ 'it=

AMTNR

:# or $( 'it=

RA50C

:# or ( 'it=

COM5T

:# or , 'it=

$:$'it=

+:9'it=

9:('it=

*:('it=

-:9'it=

,:$'it=

&

:#or$,'it=

(:$'it=

.:$'it=

$#

:#o9'it=

$$

:#or*'it=

$+

:$'it=

$9

:('it=

$*

:*or('it=

$-

:$'it=

$,

:#F&'it=

$ !O2T7R! +)LOTCCL7I507 9!O2PR7 *)C! R7JM7)T!O07 ,)P7CIAL)7RIC7 &)7RIC7OPATIO5 (P!

0IGIT!O07 $#5M!27RTP7 $$5M!27RPLA5 $+!OR76I7L0) $95M!6I7L0) $*CNARi $5ARA5CAP $,R7)7R70

5M!6I7L0) occurrence of thi fiel4

Access Channel -ield: #age Response essage


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Chung-Wei Ku

ATC/CCL/ITRI


Access Channel -ield: #age Response essage

Acce Channel fiel4

Page Reone

!eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

#####$#$

Page Reone !eagePage Reone !eage

ACK)7J

:9 'it=

!)G)7J

:9 'it=

ACKR7J

:$ 'it=

ALI0ACK

:$ 'it=

ACKTP7

:9 'it=

!)I0TP7

:9 'it=

!)I0L75

:* 'it=

!)I0

:(!)I0L75=

AMTN!O07

:+ 'it=

AMTNR

:# or $( 'it=

RA50C

:# or ( 'it=

COM5T

:# or , 'it=

!O2

T7R!

:$'it=

)LOT

CCL7

I507@

:9'it=

!O2

PR

7K

:('it=

)C!

:('it=

R7JM7)T

!O07

:9'it=

)7RKIC7

OPTIO5

:$,'it=

P!

:$'it=

5AR

A5

CAP

:$'it=

R7)7RK70

:-'it=

Access Channel -ield:


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Chung-Wei Ku

ATC/CCL/ITRI


Authentication Challenge Response essage

Acce Channel fiel4

Authentication Challenge

Reone !eage



!eage 2o4y CRC

( 'it +F(*+ 'it 9# 'it


!)GLength




fiel4

Reer8e4 or other

a nee4e4

#####$$#

Authentication Challenge Reone !eageAuthentication Challenge Reone !eage

ACK)7J

:9 'it=

!)G)7J

:9 'it=

ACKR7J

:$ 'it=

ALI0ACK

:$ 'it=

ACKTP7

:9 'it=

!)I0TP7

:9 'it=

!)I0L75

:* 'it=

!)I0

:(!)I0L75=

R7)7R70

:+ 'it=

AMTNR

:# or $( 'it=

R7)7R70

:* 'it=

Reverse Tra--ic Channels


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse Tra--ic Channels

Qariable data rates and -ormat are as -orward tra--ic channel@ 9ut transmission duty

cycle is reduced accordingly@ %9its are not repeated on this channel@

essage -ormat is identical to the -orward tra--ic channel@

Reverse Tra--ic

Channel

In-ormation 9its

%0G15 8(5 4( or0B bits>-rame

8@B )bps

4@( )bps1@( )bps

(@8 )bps

Convolutional

'5 =

$ymbol

Repetition

9loc)

Interleaver

Code

$ymbol

18@8 )sps

Code

$ymbol

18@8 )sps

Add Frame

Euality Indicator

-or =B(( &

48(( bps Rates

Add 83bit


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse CDA Channel $ignal 7eneration

Reverse Channel odulator %$preading


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse Channel odulator %$preading

Identical I5 E signals; but di--erent I5 E #. se/uences %long code Jshort code

E#$ modulation

Reverse Lin) odulation #arameters


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse Lin) odulation #arameters

1( ms interleaver -or time diversity rthogonal B43ary !alsh modulation symbols

Long code o- period 1 4130 %-or channel identi-ication

concatenated with #. codes o- length 1 02@

.oncoherent E#$ Diversity

" time diversity: coding J interleaving

" path diversity: RA< receiver

" spatial diversity: 1 R6 antennas %4 R6 antennas available during hando--

Reverse Channel Demodulation


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Chung-Wei Ku

ATC/CCL/ITRI


Reverse Channel Demodulation

$ystem with 4 -ingers and 8 searchersAntenna 9Antenna A

.ocoherent a6imal Ratio Combining

$o-t Decisions to Qiterbi Decoder

$ignaling Flow o- Registration #rocess


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$ noti-ies 9$ o- its presence %location5 status5 identi-ication5etc@ in the system

I$3=2 supports the -ollowing registration types:

" power3up registration

" power3down registration

" timer3based registration

" distance3based registration

" +one3based registration

" parameter3change registration

" ordered registration

" implicit registration



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Chung-Wei Ku

ATC/CCL/ITRI


g g g

$ 9$ $C

.ew

QLR

ld

QLR*LR

Register Determination

7lobal Challenge

Register

Qalidate RA.D

I$D. R


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Chung-Wei Ku

ATC/CCL/ITRI


g

Ac/uires the pilot channel Receives the sync channel with sync channel message

Adust to system timing

Receives the paging channel message

$ends origination message %also registration on the accesschannel

Receives channel assignment message on the paging channel

Initiali+es the tra--ic channel

IS95 Introduction

Documents

Transcript of IS95 Introduction