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8/17/2019 Faisal - Layer 3 Messaging
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Layer 3Layer 3
MessagingMessaging
By Faisal NaveedBy Faisal Naveed
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System InformationSystem Information
MessagesMessages
IntroductionIntroduction
System information (SYS INFO) containsSystem information (SYS INFO) containsnetwork parameters sent to MS through airnetwork parameters sent to MS through airinterface (Um), incluing network ientityinterface (Um), incluing network ientity
parameters, cell selection parameters, systemparameters, cell selection parameters, systemcontrol parameters an network functioncontrol parameters an network function
parametersparameters
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MS can access the network,MS can access the network,
perform cell selection, fully utili!eperform cell selection, fully utili!e "arious ser"ices pro"ie #y the "arious ser"ices pro"ie #y thenetwork, an achie"e fa"ora#lenetwork, an achie"e fa"ora#lecooperation with the network$cooperation with the network$
SYS INFO can #e i"ie into twoSYS INFO can #e i"ie into twoparts%parts%
SYS INFO sent on &'',SYS INFO sent on &'',incluing SYS INFO , *, +, an ,incluing SYS INFO , *, +, an ,
which are use #y MS in ilewhich are use #y MS in ilemoe$moe$
SYS INFO sent on S-'',SYS INFO sent on S-'',incluing SYS INFO . an /incluing SYS INFO . an /
which are use #y MS inwhich are use #y MS in
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System InformationSystem Information
Type 1Type 1
It contains ranom access controlIt contains ranom access control
information (0-') an cell fre1uencyinformation (0-') an cell fre1uencyallocation ta#le (i$e$ '- ta#le)$allocation ta#le (i$e$ '- ta#le)$
It is transmitte on &''It is transmitte on &''
2he ma3imum num#er of cell2he ma3imum num#er of cellfre1uencies con4gure in '- ('ellfre1uencies con4gure in '- ('ell
-llocation) is /$ -llocation) is /$5ue to the restriction of cell channel5ue to the restriction of cell channel
escription format, the fre1uencies of aescription format, the fre1uencies of acell cannot #e con4gure unlimitely$cell cannot #e con4gure unlimitely$
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RA! controlRA! control
parametersparametersMa3imum re6transmitting timesMa3imum re6transmitting times(M-7 retrans)(M-7 retrans)
83tene transmission timeslots83tene transmission timeslots
(239interger)(239interger)
'ell &ar access ('&-,'ell &ar access ('&-,
'8::9&-09-''8SS)'8::9&-09-''8SS)
'ommon access control le"el (-')'ommon access control le"el (-')'all reesta#lish permitte (08)'all reesta#lish permitte (08)
8mergency call permitte (8')8mergency call permitte (8')
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System Information TypeSystem Information Type
11
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System Information TypeSystem Information Type
"" It contains access control information (0-'), network
color coe permitte (N'' ;ermitte), an neigh#or cell
fre1uency allocation list (&- list)$
It is transmitte on &''$
SYS INFO * contains i
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System InformationSystem Information
Type "Type "
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System Information TypeSystem Information Type
33It contains :-I, cell ientity, 0-' anparameters relate to cell selection.It is transmitte on &''.
It contains:
'ell Ientity:-I( location area ientity)'ontrol 'hannel 5escription
'ell Option( &'')'ell Selection ;arameter
0-' 'ontrol ;arameter
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ell Identity # Locationell Identity # Location
Area Identity Area Identity 'ell >lo#al Ientity ('>I) consists of :ocation'ell >lo#al Ientity ('>I) consists of :ocation
-rea Ientity (:-I) an 'ell Ientity ('I)$ -n -rea Ientity (:-I) an 'ell Ientity ('I)$ -n:-I inclues Mo#ile 'ountry 'oe (M''),:-I inclues Mo#ile 'ountry 'oe (M''),Mo#ile Network 'oe (MN'), an :ocation -reaMo#ile Network 'oe (MN'), an :ocation -rea
'oe (:-')$ SYS INFO +, /, an contain all or'oe (:-')$ SYS INFO +, /, an contain all orpart of the information of '>I$ -ccoring to thepart of the information of '>I$ -ccoring to therecei"e SYS INFO, MS ecoes the '>I, anrecei"e SYS INFO, MS ecoes the '>I, anecie whether it can register in the networkecie whether it can register in the network#ase on the M'' an MN' inicate #y '>I$#ase on the M'' an MN' inicate #y '>I$
-t the same time, it can ?uge whether the -t the same time, it can ?uge whether thecurrent location area is change, so as to eciecurrent location area is change, so as to eciewhether it is necessary to start the locationwhether it is necessary to start the locationupating processupating process
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ell $ptionell $ption
;ower control inication (;@0');ower control inication (;@0')
5iscontinuous transmission (527)5iscontinuous transmission (527)
0aio link timeout0aio link timeout
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ell Selection %arameter ell Selection %arameter
'ell selection parameters inicate how the'ell selection parameters inicate how theMS will #eha"e after the MS is powereMS will #eha"e after the MS is powereon$ It inclues the following parameterson$ It inclues the following parameters::
'ell Selection ysteretic'ell Selection ystereticMa3imum power le"el of control channelMa3imum power le"el of control channel(MS927;@09M-79'')(MS927;@09M-79'')
Minimum recei"ing le"el of MS permitte toMinimum recei"ing le"el of MS permitte to
access (07:8=9-''8SS9MIN)access (07:8=9-''8SS9MIN)
-itional reselection parameter inicator -itional reselection parameter inicator(-'S)(-'S)
alf6rate supporte(N8'I)alf6rate supporte(N8'I)
S t I f ti TS t I t T
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System Information TypeSystem In ormat on Type33
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$t'er %arameters$t'er %arameters
'ell reselection parameter inicator (;I)'ell reselection parameter inicator (;I)
'ell &ar Aualify ('&A)'ell &ar Aualify ('&A)
'ell &ar -ccess ('&-)'ell &ar -ccess ('&-)
'ell90eselect9O
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System Informtion TypeSystem Informtion Type
&&
S I f i TS t I f ti T
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System Informtion TypeSystem Informtion Type
))
It escri#es the neigh#or cellIt escri#es the neigh#or cell&'' fre1uencies(&-* list)$ It is&'' fre1uencies(&-* list)$ It is
manatory an is transmitte onmanatory an is transmitte on
S-''$ 5i
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System Informtion Type )System Informtion Type )
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System Informtion TypeSystem Informtion Type
**
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all Setup %rocedureall Setup %rocedure
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c
c
c
c
c
c
c
T,MST,MS
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MS
BSS
NSSUSE PST
RR ChannelRequestRAC
H
Allocate TCH
RR ImmediateAssignmentAGCH, Radio Resouce ! "TCH, #equenc$
Timeslot%, Time Coection, #equenc$CoectionA&&l$ the time ' (equenc$
Coection Tune to the (equenc$ and
timeslot
RR SABM ) MM CM Se*iceRequest TCH, SAPI ! +
RRUA TCH, SAPI ! +
SCCP Connection Request ) BSSMAP Com&lete a$e- In(omation SS
.
Chec/ Su0sci0e authentication
PRESS SEN1
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MS
BSS
NSSUSE PST
Ena0le Ci&heing
BSSMAP CIPHER M21EC2MMAN1
E3&ected Ci&heed data (om the Mo0ile
RR Ci&heing ModeCommandMode !
CEAR
Ena0le Ci&heing (o Recei*ed andtansmitted 1ata
Ena0le ci&heing o( datatansmitted to the mo0ile
RR Ci&heing ModeCom&leted
Mode !CIPHERE1
BSSMAP CIPHER M21EC2MPETE
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MS
BSS
NSSUSE PST
Call Setu&CC Setu&
1ialed1igitsCC Call
PoceedingConnecting
Allocate4oice Cicuits to5ads BSS
BSSMAP ASSIGNMENTRE6UEST4oice CicuitRR CHANNE M21E
M21I#7
RR CHANNE M21E M21I#7AC8N29E1GE BSSMAP ASSIGNMENT
Com&lete ISUP INITIA A11RESS
MESSAGESS., 1ialed1igits
Aleting Tone
SS.
ISUP A11RESS C2MPETEMESSAGECC AERTING
CC C2NNECTAC8N29E1GE
CC C2NNECT ISUP ANS9ER
SS.
Mode Modi($
Connected
Con*esation S&eech
S&eech
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MS
BSS
NSSUSE PST
Call Release
CC 1isconnect
CC Release
End Button
1isconnect 4oice Path
BSSMAP CEARC2MMAN1
BSSMAP CEARC2MPETE
ISUP Released
SS.
SS
.
ISUP REEASE C2MPETE
CC Release Com&lete
ISUP REEASE
SS.
CA REEASE1 IN1ICATI2N
RR Connection Release
#REE4oice Cicuitto5ads BSS
RR CHANNE REEASE
RR UA
RR 1ISC
#REE
TCH
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2hanks2hanks