faisal - layer 3 messaging

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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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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"" 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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Type "Type "


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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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))

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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**


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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

faisal - layer 3 messaging

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