UE Timers and Interview

8/12/2019 UE Timers and Interview

1/11

UE Timers & Constants In RRC Ideal Mode & Connected Mode

UE Timer and Constant:

The following settings can only be changed when call status is Idle .

T300 RRC Conn Req Retransmit Timer

This setting determines how long the UE waits for the RRC Connection Setup after sending an

RRC Connection Setup Request.

T3 can be set to one of the following !alues" #$ %$ &$ '$ '($ '#$ '%$ '&$

($ 3$ #$ %$ & ms.

N300 RRC Conn Req Max Retransmits

This setting specifies the ma)imum number of retransmissions of the RRC Connection Request

message.

*3 can be set to any integer !alue from to +.

T312 Link Establishment Timer (Idle)

This setting determines how long the UE waits for an *3'( ,in-sync, indication from layer '

when establishing a dedicated channel and the connection status is Idle. T3'( can be set to any

integer !alue from ' to '.

T312 Link Establishment Timer (Conneted)

This setting determines how long the UE waits for an *3'( ,in-sync, indication from layer '

when establishing a dedicated channel in connected status. The !alue is not used.

N312 Link Establishment In!"#n Co$nt (Idle)

This setting specifies the number of , in-syncs, required when establishing a dedicated channel

when the connection status is Idle.

*3'( can be set to one of the following !alues" '$ ($ #$ '$ ($ $ '$ ($ #$ %$ &$

'.

N312 Link Establishment In!"#n Co$nt (Conn%)

This setting specifies the number of , in-syncs, required when establishing a dedicated channel

in connected status.

*3'( can be set to one of the following !alues" '$ ($ #$ '$ ($ $ '$ ($ #$ %$ &$

'.

T313 &$t!o'!"#n Reetion Timer

3/00 TS (.33' &..% states that after recei!ing *3'3 consecuti!e ,out of sync, indications

from layer$ the UE shall start the T3'3 timer. Upon recei!ing *3' successi!e ,in sync,
http://wcdmahelp.blogspot.com/2012/01/ue-timers-constants-in-rrc-ideal-mode.htmlhttp://wcdmahelp.blogspot.com/2012/01/ue-timers-constants-in-rrc-ideal-mode.html


2/11

indications from layer '$ the UE shall stop and reset the T3'3 timer. If T3'3 e)pires$ a ,Radio

1in2 failure, has occurred$ and the UE shall drop the call.

N313 "$essie &$t!&'!"#n Reetion Max

*3'3 specifies the ma)imum number of successi!e ,out of sync, recei!ed from 1'.

*3'3 can be set to one of the following integer !alues" '$ ($ #$ '$ ($ $ '$ (.

N31* "$essie In!"#n Reetion Co$nter

*3' specifies the ma)imum number of successi!e ,in sync, recei!ed from 1' during T3'3 is

acti!ated.

*3' can be set to one of the following integer !alues" '$ ($ #$ '$ ($ $ '$ ($ #$ %$

&$ '.

T30+ RRC Conn Release Com Retransmit Timer

T3& specifies the time between the transmissions of RRC Connection Release Complete

message.

N30+ RRC Conn Release Com Max Retransmits

*3& specifies the ma)imum number of retransmissions of the RRC CONNECTION RELEASE

COMPLETEmessage.

T3212 ,eriodi Loation -date Timer

T3('( specifies how often the UE will perform the periodic location update procedure. It is

signaled in SI'.

4hen T3('( is set to 5ero$ the UE will regard the timer to be infinite.


3/11

Interview Question & Answer For 3G / WCMA / UMT!

UMTS interview questions:

1)What are the RRC states?

a.Cell DCHb.Cell FACH

c.Cell PCH

d.URA PCH2)Describe different RRC States?

a. Cell DCH:When UE is sitched !"# it ass$%es the CE&&'DCH State b( defa$lt.

t e*ists hen UE reall( re+$ires U&,D& dedicated res-$rce.UE is characteried at cell le/el acc-rdin0 t- its c$rrent Acti/e set.

&-0ical channels DCCHD2CH are %a33ed t- trans3-rt channel DCH.E.0. 4-ice call5CS)# 4ide- tele3h-n(5CSPS)

b.Cell FACH:2his ha33ens hen#

51) UE d-esn6t re+$ire c-ntin$-$s circ$it c-nnecti-n ith n,# b$t D& 3ac7ets ill -r7.58) UE is f-rced t- release the n, res-$rces t- decrease the c-n0esti-n 3r-ble%s 5fli39

fl-3 beteen DCH and FACH).5) E/ent$al l-cati-n $3dates t- s$33-rt CE&&'PCH and URA'PCH states 5fli39fl-3

beteen FACH and PCH).E.0. Call -n h-ld5CS)# File d-nl-adin05PS)

"- dedicated U&,D& is 3r-/ided. H-e/er# UE ill 7ee3 %-nit-rin0 t- D& c-%%-n trans3-rtchannel FACH ;c-ntin$-$sl(6 and recei/es 3ac7et data %eant f-r UE itself.

When U& trans%issi-n is re+$ired# it $ses RACH f-r 198 fra%es -r CPCH f-r fe %-re fra%es#

de3endin0 -n c-%%-n access 3r-ced$res< still U& trans%issi-n ill be ;disc-ntin$-$s6.UE is 7n-n -n cell le/el# b$t this ti%e it6s based -n the last cell $3date it %ade.c.Cell PCH:

2his ha33ens hen UE d-esn6t re+$ire an acti/e c-nnecti-n5c-%%-n,dedicated). =$t still

needs t- be c-nnected# as it6s e*3ectin0 a n, initiated -r ter%inated call5CS -r PS) inf$t$re.

S-# n- U& trans%issi-n is all-ed. Selects a PCH5based -n al0-.) and 7ee3 %-nit-rin0

5recei/in0) it in ;disc-ntin$-$s6 %-de5DR>).Can c-%%$te -nl( int- CE&&'FACH state.

E.0. "- -$t0-in0 call -r data recei/e f-r l-n0 ti%eUE is still identified -n cell le/el# b$t n- in the cell here UE %ade its last $3date# hen it

as in CE&&'FACH state.At re0$lar ti%e inter/al# UE -$ld ha/e t- %-/e in CE&&'FACH state t- $3date the l-cati-n

area. f UE is tra/elin0# this $3date ill bec-%e fre+$ent beca$se -f chan0in0 cells.n s-%e cases UE can ha/e the transiti-n fr-% CE&&'DCH t- CE&&'PCH# b$t n-t /ice /ersa< it

has t- 0- /ia CE&&'FACH.d.URA PCH:

2his can be c-nsidered as a 0eneral case -f CE&&'PCH state. =eca$se all the characteristicsare sa%e e*ce3t -ne.

2hat is# UE is 7n-n -n URA5U2RA" Re0istrati-n Area) le/el rather than cell le/el. t listens t-PCH5and $3dates URA hen re+$ired).


4/11

f UE is tra/elin0 c-ntin$-$sl( fr-% -ne cell t- an-ther. t -$ld ha/e t- transit %$lti3le ti%et- CE&&'FACH state f-r l-cati-n $3date. =( assi0nin0 URA'PCH state# this c-nditi-n is

a/-ided# since 1 URA c-ntains -ne -r %-re cells and /ice /ersa.)n hich c-nditi-ns UE ill be in Cell FACH state?

2his ha33ens hen#UE d-esn6t re+$ire c-ntin$-$s circ$it c-nnecti-n ith n,# b$t D& 3ac7ets ill -r7.

UE is f-rced t- release the n, res-$rces t- decrease the c-n0esti-n 3r-ble%s 5fli39fl-3beteen DCH and FACH).

E/ent$al l-cati-n $3dates t- s$33-rt CE&&'PCH and URA'PCH states 5fli39fl-3 beteen FACH

and PCH).

E.0. Call -n h-ld5CS)# File d-nl-adin05PS))What is the difference beteen Cell PCH and URA PCH state?

UE is 7n-n -n URA5U2RA" Re0istrati-n Area) le/el rather than cell le/elf UE is tra/elin0 c-ntin$-$sl( fr-% -ne cell t- an-ther. t -$ld ha/e t- transit %$lti3le ti%e

t- CE&&'FACH state f-r l-cati-n $3date. =( assi0nin0 URA'PCH state# this c-nditi-n isa/-ided# since 1 URA c-ntains -ne -r %-re cells and /ice /ersa

@)What is U9R"2?UR"2 is a 8bit identit(.

SR"C identifier SR"2 %a7es UR"2

)Describe the CE&& search 3r-ced$re?2he Cell Search 3r-ced$re can be s$%%arised int- the f-ll-in0 ste3s:

a.Cell Selection: Deter%ine the cell h-se recei/ed carrier 3-er is the str-n0est

b.Slot Synchronisation: the UE reads the P9SCH -f the str-n0est carrier and feeds therecei/ed si0nal thr-$0h a %atched filter 5that is %atched t- the Pri%ar( S(nchr-nisati-n

C-de). 2he sl-t ti%in0 is detected /ia detecti-n -f 3ea7s in the -$t3$t -f the %atched filter.c.Frame Synchronisation and Scrambling Code Gro! "denti#ication: the UE reads the

S9SCH -f the str-n0est carrier# and c-rrelates the recei/ed si0nal ith all the 3-ssible Sec-ndar( S(nchr-nisati-n C-des. 2he -$t3$t that 0i/es %a*i%$% c-rrelati-n 0i/es the

0r-$3 -f the Pri%ar( Scra%blin0 C-de $sed in the cell. 2his 3r-cess als- 0i/es the fra%eti%in0 since the Sec-ndar( S(nchr-nisati-n C-de is different f-r each sl-t and the 0r-$3

tells the %a33in0 beteen sl-ts and SSCs.

d.Scrambling Code "denti#ication: 2he UE atte%3ts then t- read the P9CPCH s- as t-e*tract the Pri%ar( Scra%blin0 C-de $sed in the cell. 2he P9CPCH is ala(s scra%bled b(

the Pri%ar( Scra%blin0 C-de -f the cell and is s3read a fact-r 8@ and an !4SF h-seinde* is er-. Since the Pri%ar( Scra%blin0 C-des are 0r-$3ed int- 0r-$3s -f B

Scra%blin0 C-des and the S9SCH has0i/en the Scra%blin0 C-de 0r-$3 -nl( B 3-ssibilities re%ain. S- the P9CPCH is $nscra%bled

se3aratel( ithe/er( 3-ssible Scra%blin0 C-de 5B) in the 0r-$3 and -nl( -ne -$t3$t ill

3r-d$ce c-rrect res$lts and the Pri%ar( Scra%blin0 C-de -f the cell is deter%ined.e.Read $roadcast "n#ormation: Since the P9CCPCH is ala(s scra%bled b( the Pri%ar(

Scra%blin0 C-de -f the cell 5hich has n- been deter%ined) and is ala(s s3read $sin0SF8@ ith !4SF inde*1# 2he UE can read the P9CCPCH ith-$t an( 3r-ble%. 2he P9

CCPCH carries the =CH here s(ste% inf-r%ati-n bl-c7s are br-adcast thr-$0h-$t theentire cell. 2he UE can ac+$ire at this sta0e /ari-$s inf-r%ati-n 5e.0. S3readin0 Fact-rs#

!4SF inde*es and Scra%blin0 C-des $sed in -ther d-nlin7 channels# i%3-rtant3ara%eters f-r PRACH trans%issi-n# eas$re%ent Para%eters# 2rans3-rt F-r%ats etc.) and

can then dec-de-ther d-nlin7 channels# initiate a PRACH 3r-ced$re# 3erf-r%s s-%es3ecific %eas$re%ents etc.

)Radi- bearer c-nfi0$rati-n %a33in0s?Si0nallin0 radi- bearer R= shall be $sed f-r all %essa0es sent -n the CCCH 5U&: R&C92# D&:

R&C9U).Si0nallin0 radi- bearer R=1 shall be $sed f-r all %essa0es sent -n the DCCH# hen $sin0 R&C

$nac7n-led0ed %-de 5R&C9U).


5/11

Si0nallin0 radi- bearer R=8 shall be $sed f-r all %essa0es sent -n the DCCH# hen $sin0 R&Cac7n-led0ed %-de 5R&C9A)# e*ce3t f-r the RRC %essa0es carr(in0 hi0her la(er 5"AS)

si0nallin0.Si0nallin0 radi- bearer R= and -3ti-nall( Si0nallin0 radi- bearer R= shall be $sed f-r the

RRC %essa0es carr(in0 hi0her la(er 5"AS) si0nallin0 and sent -n the DCCH in R&Cac7n-led0ed %-de 5R&C9A).

Additi-nall(# R=s h-se identities shall be set beteen @ and 8 %a( be $sed as si0nallin0radi- bearer f-r the RRC %essa0es -n the DCCH sent in R&C trans3arent %-de 5R&C92).

B)What are the t(3es -f hand -/er?

Here are f-ll-in0 cate0-ries -f hand-/er 5als- referred t- as hand-ff):

Hard Hando%erHard hand-/er %eans that all the -ld radi- lin7s in the UE are re%-/edbef-re the ne radi- lin7s are established. Hard hand-/er can be sea%less -r n-n9

sea%less. Sea%less hard hand-/er %eans that the hand-/er is n-t 3erce3tible t- the $ser.n 3ractice a hand-/er that re+$ires a chan0e -f the carrier fre+$enc( 5inter9fre+$enc(

hand-/er) is ala(s 3erf-r%ed as hard hand-/er.So#t Hando%er

S-ft hand-/er %eans that the radi- lin7s are added and re%-/ed in a a( that the UEala(s 7ee3s at least -ne radi- lin7 t- the U2RA". S-ft hand-/er is 3erf-r%ed b( %eans -f

%acr- di/ersit(# hich refers t- the c-nditi-n that se/eral radi- lin7s are acti/e at the sa%e

ti%e. "-r%all( s-ft hand-/er can be $sed hen cells -3erated -n the sa%e fre+$enc( arechan0ed.

So#ter hando%erS-fter hand-/er is a s3ecial case -f s-ft hand-/er here the radi- lin7s that

are added and re%-/ed bel-n0 t- the sa%e "-de = 5i.e. the site -f c-9l-cated base stati-nsfr-% hich se/eral sect-r9cells are ser/ed. n s-fter hand-/er# %acr- di/ersit( ith

%a*i%$% rati- c-%binin0 can be 3erf-r%ed in the "-de =# hereas 0enerall( in s-fthand-/er -n the d-nlin7# %acr- di/ersit( ith selecti-n c-%binin0 is a33lied.

Generall( e can distin0$ish beteen intra9cell hand-/er and inter9cell hand-/er. F-r U2Sthe f-ll-in0 t(3es -f hand-/er are s3ecified:

Hand-/er G 9G 5i.e. beteen U2S and -ther G s(ste%s)FDD s-ft,s-fter hand-/er

FDD inter9fre+$enc( hard hand-/er

FDD,2DD hand-/er 5chan0e -f cell)2DD,FDD hand-/er 5chan0e -f cell)

2DD,2DD hand-/erHand-/er G 9 8G 5e.0. hand-/er t- GS)

Hand-/er 8G 9 G 5e.0. hand-/er fr-% GS)

2he %-st -b/i-$s ca$se f-r 3erf-r%in0 a hand-/er is that d$e t- its %-/e%ent a $ser can

be ser/ed in an-ther cell %-re efficientl( 5li7e less 3-er e%issi-n# less interference). t%a( h-e/er als- be 3erf-r%ed f-r -ther reas-ns s$ch as s(ste% l-ad c-ntr-l.

)What are t(3es -f %eas$re%ents?"ntrare'ency measrements: %eas$re%ents -n d-nlin7 3h(sical channels at the sa%e

fre+$enc( as the acti/e set. A %eas$re%ent -bIect c-rres3-nds t- -ne cell."nterre'ency measrements: %eas$re%ents -n d-nlin7 3h(sical channels at

fre+$encies that differ fr-% the fre+$enc( -f the acti/e set and -n d-nlin7 3h(sicalchannels in the acti/e set. A %eas$re%ent -bIect c-rres3-nds t- -ne cell.

"nter&RA( measrements: %eas$re%ents -n d-nlin7 3h(sical channels bel-n0in0 t-an-ther radi- access techn-l-0( than U2RA"# e.0. GS. A %eas$re%ent -bIect c-rres3-nds

t- -ne cell.(ra##ic %olme measrements: %eas$re%ents -n $3lin7 traffic /-l$%e. A %eas$re%ent

-bIect c-rres3-nds t- -ne cell.


6/11

ality measrements: eas$re%ents -f d-nlin7 +$alit( 3ara%eters# e.0. d-nlin7trans3-rt bl-c7 err-r rate. A %eas$re%ent -bIect c-rres3-nds t- -ne trans3-rt channel in

case -f =&ER. A %eas$re%ent -bIect c-rres3-nds t- -ne ti%esl-t in case -f SR 52DD -nl().U*&internal measrements: eas$re%ents -f UE trans%issi-n 3-er and UE recei/ed

si0nal le/el.U* !ositioning measrements: eas$re%ents -f UE 3-siti-n.

1)What is 3a0in0? Wh( 3a0in0 is re+$ired?Paging: 2his 3r-ced$re is $sed t- trans%it 3a0in0 inf-r%ati-n t- selected UEs in idle %-de#CE&&'PCH -r URA'PCH state $sin0 the 3a0in0 c-ntr-l channel 5PCCH).

Paging can be initiated :

U33er la(ers in the net-r7 %a( re+$est 3a0in0# t- e.0. establish a si0nalin0 c-nnecti-n.U2RA" %a( initiate 3a0in0 f-r UEs in CE&&'PCH -r URA'PCH state t- tri00er a cell $3date

3r-ced$re.U2RA" %a( initiate 3a0in0 f-r UEs in idle %-de# CE&&'PCH and URA'PCH state t- tri00er

readin0 -f $3dated s(ste% inf-r%ati-n.U2RA" %a( als- initiate 3a0in0 f-r UEs in CE&&'PCH and URA'PCH state t- release the RRC

c-nnecti-n.11)2(3e -f Pa0in0?

Pa0in0 2(3e 1

Pa0in0 2(3e 85UE dedicated 3a0in0)18)When dedicated 3a0in0 is $sed?a.2his 3r-ced$re is $sed t- trans%it dedicated 3a0in0 inf-r%ati-n t- -ne UE in c-nnected

%-de in CE&&'DCH # CE&&'FACH -r CE&&'PCH 5FDD -nl() state. U33er la(ers in thenet-r7 %a( re+$est initiati-n -f 3a0in0.

b.F-r a UE in CE&&'DCH# CE&&'FACH -r CE&&'PCH 5FDD -nl() state# U2RA" initiates the3r-ced$re b( trans%ittin0 a PAG"G 2JPE 8 %essa0e -n the DCCH $sin0 A R&C. When n-t

stated -therise elsehere# the U2RA" %a( initiate the UE dedicated 3a0in0 3r-ced$re als-hen an-ther RRC 3r-ced$re is -n0-in0# and in that case the state -f the latter 3r-ced$re

shall n-t be affected.c.U2RA" sh-$ld set the E KPa0in0 ca$seK t- the ca$se f-r 3a0in0 recei/ed fr-% $33er la(ers.

f n- ca$se f-r 3a0in0 is recei/ed fr-% $33er la(ers# U2RA" sh-$ld set the /al$e

K2er%inatin0 L ca$se $n7n-nK.1)n hat sit$ati-n UE 0-es t- CE&& PCH and URA PCH states?

a.Cell PCH:2his ha33ens hen UE d-esn6t re+$ire an acti/e C-nnecti-n5c-%%-n,dedicated). =$t still

needs t- be c-nnected# as it6s e*3ectin0 a n, initiated -r ter%inated call5CS -r PS) inf$t$re

b.URA PCH:

n Cell PCH UE is still identified -n cell le/el# b$t n- in the cell here UE %ade its last$3date# hen it as in CE&&'FACH state.At re0$lar ti%e inter/al# UE -$ld ha/e t- %-/e in

CE&&'FACH state t- $3date the l-cati-n area. f UE is tra/elin0# this $3date ill bec-%efre+$ent beca$se -f chan0in0 cells. f UE is tra/elin0 c-ntin$-$sl( fr-% -ne cell t- an-ther.

t -$ld ha/e t- transit %$lti3le ti%e t- CE&&'FACH state f-r l-cati-n $3date. =( assi0nin0URA'PCH state# this c-nditi-n is a/-ided# since 1 URA c-ntains -ne -r %-re cells and /ice

/ersa1)What is Cell U3date Pr-ced$re? What are /ari-$s Cell U3date ca$ses?

U!lin+ data transmission:

F-r FDD# if the /ariable H'R"2 is n-t set# and f-r 2DD:if the UE is in URA'PCH -r CE&&'PCH state< andif the UE has $3lin7 R&C data PDU -r $3lin7 R&C c-ntr-l PDU -n R=1 -r $3ards t-

trans%it:

3erf-r% cell $3date $sin0 the ca$se K!lin+ data transmissionK.


7/11

Paging res!onse:if the criteria f-r 3erf-r%in0 cell $3date ith the ca$se s3ecified ab-/e. are

n-t %et< andif the UE in URA'PCH -r CE&&'PCH state# recei/es a PAG"G 2JPE 1

.%essa0e f$lfillin0 the c-nditi-ns f-r initiatin0 a cell $3date 3r-ced$re.

3erf-r% cell $3date $sin0 the ca$se K!aging res!onseK.Radio lin+ #ailre:

if n-ne -f the criteria f-r 3erf-r%in0 cell $3date ith the ca$ses s3ecified

ab-/e in the c$rrent s$bcla$se is %et:if the UE is in CE&&'DCH state and the criteria f-r radi- lin7 fail$re are #-r

if the trans%issi-n -f the UE CAPA=&2J "F!RA2!" %essa0e fails.

perform cell update using the cause "radio lin" #ailure".

,$,S !t! R$ re'est:

if n-ne -f the criteria f-r 3erf-r%in0 cell $3date ith the ca$ses s3ecifiedab-/e in the c$rrent s$bcla$se is %et< and

if the UE is in URA'PCH# Cell'PCH -r Cell'FACH state< and

if the UE sh-$ld 3erf-r% cell $3date f-r =S 3t3 radi- bearer re+$est#3erf-r% cell $3date $sin0 the ca$se K,$,S !t! R$ re'estK.

Re&entering ser%ice area:if n-ne -f the criteria f-r 3erf-r%in0 cell $3date ith the ca$ses s3ecified

ab-/e in the c$rrent s$bcla$se is %et< and

if the UE is in CE&&'FACH -r CE&&'PCH state< and8M0t< if the UE has been -$t -f ser/ice area and re9enters ser/ice area

bef-re 2 -r 21 e*3ires:M0t< 3erf-r% cell $3date $sin0 the ca$se Kre&entering ser%ice areaK.

R-C nreco%erable error:


if the UE detects R&C $nrec-/erable err-r N1O in an A R&C entit(:3erf-r% cell $3date $sin0 the ca$se KR-C nreco%erable errorK.

Cell reselection:if n-ne -f the criteria f-r 3erf-r%in0 cell $3date ith the ca$ses s3ecified

ab-/e in the c$rrent s$bcla$se is %et:if the UE is in CE&&'FACH -r CE&&'PCH state and the UE 3erf-r%s cell re9selecti-n< -r

if the UE is in CE&&'FACH state and the /ariable C'R"2 is e%3t(:

3erf-r% cell $3date $sin0 the ca$se Kcell reselectionK.Periodical cell !date:


if the UE is in CE&&'FACH -r CE&&'PCH state< and

if the ti%er 2@ e*3ires< andif the criteria f-r Kin ser/ice areaK and

if 3eri-dic $3datin0 has been c-nfi0$red b( 2@ in the E KUE 2i%ers andc-nstants in c-nnected %-deK set t- an( -ther /al$e than Kinfinit(K:

3erf-r% cell $3date $sin0 the ca$se K!eriodical cell !dateK.


8/11

,$,S rece!tion:if n-ne -f the criteria f-r 3erf-r%in0 cell $3date ith the ca$ses s3ecified

ab-/e in the c$rrent s$bcla$se is %et< andif the UE is in URA'PCH# Cell'PCH -r Cell'FACH state< and

if the UE sh-$ld 3erf-r% cell $3date f-r =S c-$ntin0 #

3erf-r% cell $3date $sin0 the ca$se K,$,S rece!tionK.1@)What is Acti/e set?

Acti%e Setis defined as the set -f "-de9=s the UE is si%$ltane-$sl( c-nnected t- 5i.e.# the

U2RA cells c$rrentl( assi0nin0 a d-nlin7 DPCH t- the UE c-nstit$te the acti/e set).1)What is -nit-r set and detected set Cells?

a.Cells# hich are n-t incl$ded in the acti/e set# b$t are incl$ded in the CE&&'"F!'&S2bel-n0 t- the ,onitored Set.

b.Cells detected b( the UE# hich are neither in the CE&&'"F!'&S2 n-r in the acti/e setbel-n0 t- the Detected Set. Re3-rtin0 -f %eas$re%ents -f the detected set is -nl(

a33licable t- intra9fre+$enc( %eas$re%ents %ade b( UEs in CE&&'DCH state.1)What are the /ari-$s t(3es -f R"C?

a.Ser/in0 R"Cb.Drift R"C

c.C-ntr-llin0 R"C1B)What is the $se and difference beteen CR"C# Drift R"C and SR"C?

R"C fr-% hich the UE is c$rrentl( 0ettin0 Ser/ed -r c-nnected t- is called SR"C -rSer/in0 R"C.

D$rin0 a s-ft hand-/er 3r-ced$re the R"C UE is %-/in0 t-# is called Drift R"C.2he R"C hich c-ntr-ls the %-/e%ent -f UE fr-% Ser/in0 R"C t- the Drift R"C is called

C-ntr-llin0 R"C.

1)What is initial direct transfer %essa0e? What is the $se?2he initial direct transfer 3r-ced$re is $sed in the $3lin7 t- establish a si0nalin0 c-nnecti-n.

t is als- $sed t- carr( an initial $33er la(er 5"AS) %essa0e -/er the radi- interface.

8)What is sec$rit( %-de c-%%and? Wh( it is $sed?Sec$rit( %-de c-%%and is a RRC essa0e#

2he 3$r3-se -f this 3r-ced$re :2- tri00er the start -f ci3herin0 -r t- c-%%and the restart -f the ci3herin0 ith a ne

ci3herin0 c-nfi0$rati-n# f-r the radi- bearers -f -ne C" d-%ain and f-r all si0nallin0 radi-bearers.

t is als- $sed t- start inte0rit( 3r-tecti-n -r t- %-dif( the inte0rit( 3r-tecti-n c-nfi0$rati-nf-r all si0nallin0 radi- bearers

81)What is CC2rCH?A C-ded C-%3-site 2rans3-rt Channel is the res$lt -f c-%binin0 5%$lti3le*in0) se/eral

2rans3-rt Channels -f the sa%e t(3e< i.e.: e can ha/e a CC2rCh %ade $3 -f -ne -rse/eral DCHs# a CC2rCh %ade $3 -f DSCHs. !ne e*ce3ti-n is that e can ha/e -ne -r

se/eral FACHs %$lti3le*ed ith a PCH -n the sa%e CC2rCh.A better n-tati-n -$ld be f-r e*a%3le:

CC2rChDCH: A CC2rCh c-nsistin0 -f DCHsCC2rChFACH: A CC2rCh c-nsistin0 -f FACHs

CC2rChPCH#8FACH: A CC2rCh c-nsistin0 -f the PCH and 8 FACHs88)What is c-%3ressed %-de?

Hi0her la(ers can re+$est a UE t- %-nit-r cells -n -ther fre+$encies 5FDD# 2DD)# -r -thers(ste%s 5GS). 2his i%3lies that the UE has t- 3erf-r% %eas$re%ents# -n the -ther

fre+$encies,s(ste%s and th$s hi0her la(ers c-%%and the UE t- enter C-%3ressed -de.2he U2RA" need t- send t- the UE all the 3ara%eters f-r the C-%3ressed -de.

Com!ression ,ethods:


9/11

When in C-%3ressed -de the inf-r%ati-n n-r%all( trans%itted d$rin0 a 1 %s fra%e isc-%3ressed in ti%e s-that 0a3s -f ade+$ate len0th are created. 2- achie/e this -ne -f three

%echanis%sPnctring

2his %eth-d is "!2 a33licable t- d-nlin7.S!read Factor Redction

Act$all( hal/in0 the S3read Fact-r. S- ith this %eth-d if SF is $sed in n-n9c-%3ressedfra%es then SF,8 is $sed in the c-%3ressed fra%es.

Higher -ayer Schedling

Hi0her &a(ers set restricti-ns s- that -nl( a s$bset -f all-ed 2FCs are $sedin C-%3ressed -de.Com!ressed ,ode Parameter:(GS 52rans%issi-n Ga3 Startin0 Sl-t "$%ber): A trans%issi-n 0a3 3attern be0ins in a

radi- fra%e# called firstradi- fra%e -f the trans%issi-n 0a3 3attern# c-ntainin0 at least -netrans%issi-n 0a3 sl-t. 2GS" is the sl-t n$%ber-f the first trans%issi-n 0a3 sl-t ithin the

first radi- fra%e -f the trans%issi-n 0a3 3attern

Documents

UE Timers and Interview