Radio Link Failure Event In CELL_DCH State, after receiving N313 consecutive out of s!nc indications fro" la!er 1 for t#e esta$lis#ed D%CCH or F&D%CH '#!sical c#annel in FDD, t#e RRC (ill start t#e t#e )E s#all start ti"er ti "er *313+ )'on e'ir! of ti"er *313, a Radio Link Failure event is triggered+
If N31- successive in s!nc indications are received fro" la!er 1 (#ile t#e ti"er (as running, t#e ti"er is sto''ed and Radio Link Failure does not occur+ .nd t#e L1 re'orts /ut&of&s!nc /ut&of&s!nc to RRC if one of t#e follo(ing criteria is fulfilled0 *#e L1 esti"ates t#e D%CCH ualit! or t#e ualit! of t#e *%C fields of t#e F&D%CH fra"e received fro" t#e serving HS&DSCH cell over t#e 'revious 12 "s 'eriod to $e (orse t#an a t#res#old 4out+ *#e 5 "ost recentl! received trans'ort $locks (it# a non&6ero lengt# CRC attac#ed, as o$served on all *rCHs using non&6ero lengt# CRC "a''ed to t#e D%DCH, #ave $een received (it# incorrect CRC+ In addition, over t#e 'revious 12 "s, all trans'ort $locks (it# a non&6ero lengt# CRC attac#ed #ave $een received (it# incorrect CRC+ •
•
/nce t#e Radio Link Failure #a''ens, t#e )E tries to recover fro" it $! sending CELL )%D.*E )%D.*E "essage indicating cause 7Radio Link Failure8+ If t#e net(ork res'onds (it# a CELL )%D.*E )%D.*E C/NFIR9 (#ile t#e retries fro" )E are not e#austed, t#e Radio Link is restored and t#e data is resu"ed+ *#e CELL )%D.*E )%D.*E C/NFIR9 "essage " essage contains reconfigured 'ara"eters for t#e %#!sical c#annel+ *#ese "ake t#e c#annel "ore ro$ust:lo(ering t#e 9odulation sc#e"e, increasing t#e redundanc!; redundanc!; so t#at t#ere is "ore c#ance of t#e c#annel $eing decoded 'ro'erl! at t#e )E+ It follo(s t#e follo(ing states0
UE Timers & Constants In RRC Ideal Mode & Connected Mode
UE Timer and Constant: The following settings can only be changed when call status is Idle. T300 RRC Conn Req Retransmit Timer This setting determines how long the UE waits for the RRC Connection Setup after sending an RRC Connection Setup Request. T3 can be set to one of the following !alues" #$ %$ &$ '$ '($ '#$ '%$ '&$ ($ 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 (dle! 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 (Conne"ted! 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 n#$%n" Co&nt (dle! This setting specifies the number of , in-syncs, required when establishing a dedicated channel when the connection status is Idle. *3'( can be set to one of the following !alues" '$ ($ #$ '$ ($ $ '$ ($ #$ %$ &$ '. N312 Link Establishment n#$%n" Co&nt (Conn'! This setting specifies the number of , in-syncs, required when establishing a dedicated channel in connected status.
*3'( can be set to one of the following !alues" '$ ($ #$ '$ ($ $ '$ ($ #$ %$ &$ '. T313 &t#o)#$%n" Re"e*tion Timer 3/00 TS (.33' &..% states that after recei!ing *3'3 consecuti!e ,out of sync, indications from layer$ the UE shall start the T3'3 timer. Upon recei!ing *3' successi!e ,in sync, 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 $&""essi+e &t#)#$%n" Re"e*tion 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, $&""essi+e n#$%n" Re"e*tion 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 COMPLETE message. T3212 .eriodi" Lo"ation U*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.
Interview Question & Answer For 3G / WCDMA / UMTS
'6 4hat are the RRC states7 a. Cell 8C9 b. Cell :;C9 c. Cell 0C9 d. UR; 0C9 2! 8escribe different RRC States7 a' Cell /C" < 4hen UE is switched =*$ it assumes the CE11>8C9 State by default. < It e)ists when UE really requires U1?81 dedicated resource. < UE is characteri5ed at cell le!el according to its current ;cti!e set. < 1ogical channels 8CC9@8TC9 are mapped to transport channel 8C9. < E.g. Aoice callBCS6$ Aideo telephonyBCS@0S6 b' Cell C: < This happens when$ B'6 UE doesnt require continuous circuit connection with n?w$ but 81 pac2ets will wor2. B(6 UE is forced to release the n?w resources to decrease the congestion problems Bflip-flop between 8C9 and :;C96. B36 E!entual location updates to support CE11>0C9 and UR;>0C9 states Bflip-flop between :;C9 and 0C96. < E.g. Call on holdBCS6$ :ile downloadingB0S6 < *o dedicated U1?81 is pro!ided. 9owe!er$ UE will 2eep monitoring to 81 common transport channel :;C9 Dcontinuously and recei!es pac2et data meant for UE itself. < 4hen U1 transmission is required$ it uses R;C9 for '-( frames or C0C9 for few more frames$ depending on common access procedures still U1 transmission will be Ddiscontinuous. < UE is 2nown on cell le!el$ but this time its based on the last cell update it made. "' Cell .C: < This happens when UE doesnt require an acti!e connectionBcommon?dedicated6. ut still needs to be connected$ as its e)pecting a n?w initiated or terminated callBCS or 0S6 in future. < So$ no U1 transmission is allowed. Selects a 0C9Bbased on algo.6 and 2eep monitoring Brecei!ing6 it in Ddiscontinuous modeB8RF6. < Can commute only into CE11>:;C9 state. < E.g. *o outgoing call or data recei!e for long time < UE is still identified on cell le!el$ but now in the cell where UE made its last update$ when it was in CE11>:;C9 state. < ;t regular time inter!al$ UE would ha!e to mo!e in CE11>:;C9 state to update the location area. If UE is tra!eling$ this update will become frequent because of changing cells. < In some cases UE can ha!e the transition from CE11>8C9 to CE11>0C9$ but not !ice !ersa it has to go !ia CE11>:;C9. d' UR .C: < This can be considered as a general case of CE11>0C9 state. ecause all the characteristics are same e)cept one. < That is$ UE is 2nown on UR;BUTR;* Registration ;rea6 le!el rather than cell le!el. It listens to 0C9Band updates UR; when required6. < If UE is tra!eling continuously from one cell to another. It would ha!e to transit multiple time to CE11>:;C9 state for location update. y assigning UR;>0C9
state$ this condition is a!oided$ since ' UR; contains one or more cells and !ice !ersa. 36 In which conditions UE will be in Cell :;C9 state7 This happens when$ < UE doesnt require continuous circuit connection with n?w$ but 81 pac2ets will wor2. < UE is forced to release the n?w resources to decrease the congestion problems Bflip-flop between 8C9 and :;C96. < E!entual location updates to support CE11>0C9 and UR;>0C9 states Bflip-flop between :;C9 and 0C96. E.g. Call on holdBCS6$ :ile downloadingB0S6 #6 4hat is the difference between Cell 0C9 and UR; 0C9 state7 < UE is 2nown on UR;BUTR;* Registration ;rea6 le!el rather than cell le!el < If UE is tra!eling continuously from one cell to another. It would ha!e to transit multiple time to CE11>:;C9 state for location update. y assigning UR;>0C9 state$ this condition is a!oided$ since ' UR; contains one or more cells and !ice !ersa 6 4hat is U-R*TI7 UR*TI is a 3(bit identity. SR*C identifier @ SR*TI ma2es UR*TI %6 8escribe the CE11 search procedure7 The Cell Search procedure can be summarised into the following steps" a. Cell $ele"tion" 8etermine the cell whose recei!ed carrier power is the strongest b. $lot $%n"hronisation" the UE reads the 0-SC9 of the strongest carrier and feeds the recei!ed signal through a matched filter Bthat is matched to the 0rimary Synchronisation Code6. The slot timing is detected !ia detection of pea2s in the output of the matched filter. c. rame $%n"hronisation and $"ramblin Code 4ro&* denti)i"ation" the UE reads the S-SC9 of the strongest carrier$ and correlates the recei!ed signal with all the possible %# Secondary Synchronisation Codes. The output that gi!es ma)imum correlation gi!es the group of the 0rimary Scrambling Code used in the cell. This process also gi!es the frame timing since the Secondary Synchronisation Code is different for each slot and the group tells the mapping between slots and SSCs. d. $"ramblin Code denti)i"ation" The UE attempts then to read the 0-C0IC9 so as to e)tract the 0rimary Scrambling Code used in the cell. The 0-C0IC9 is always scrambled by the 0rimary Scrambling Code of the cell and is spread a factor (% and an =AS: whose inde) is 5ero. Since the 0rimary Scrambling Codes are grouped into %# groups of & Scrambling Codes and the S-SC9 has gi!en the Scrambling Code group only & possibilities remain. So the 0-C0IC9 is unscrambled separately withe!ery possible Scrambling Code B&6 in the group and only one output will produce correct results and the 0rimary Scrambling Code of the cell is determined. e. Read 5road"ast n)ormation" Since the 0-CC0C9 is always scrambled by the 0rimary Scrambling Code of the cell Bwhich has now been determined6 and is always spread using S:G(% with =AS: inde)G'$ The UE can read the 0-CC0C9 without any problem. The 0-CC0C9 carries the C9 where system information bloc2s are broadcast throughout the entire cell. The UE can acquire at this stage !arious information Be.g. Spreading :actors$ =AS: inde)es and Scrambling Codes used in other downlin2 channels$ important
parameters for 0R;C9 transmission$ Heasurement 0arameters$ Transport :ormats etc.6 and can then decodeother downlin2 channels$ initiate a 0R;C9 procedure$ performs some specific measurements etc. +6 Radio bearer configuration mappings7 < Signalling radio bearer R shall be used for all messages sent on the CCC9 BU1" R1C-TH$ 81" R1C-UH6. < Signalling radio bearer R' shall be used for all messages sent on the 8CC9$ when using R1C unac2nowledged mode BR1C-UH6. < Signalling radio bearer R( shall be used for all messages sent on the 8CC9$ when using R1C ac2nowledged mode BR1C-;H6$ e)cept for the RRC messages carrying higher layer B*;S6 signalling. < Signalling radio bearer R3 and optionally Signalling radio bearer R# shall be used for the RRC messages carrying higher layer B*;S6 signalling and sent on the 8CC9 in R1C ac2nowledged mode BR1C-;H6. < ;dditionally$ Rs whose identities shall be set between and 3( may be used as signalling radio bearer for the RRC messages on the 8CC9 sent in R1C transparent mode BR1C-TH6. &6 4hat are the types of hand o!er7 9ere are following categories of hando!er Balso referred to as handoff6" < ard ando+er9ard hando!er means that all the old radio lin2s in the UE are remo!ed before the new radio lin2s are established. 9ard hando!er can be seamless or non-seamless. Seamless hard hando!er means that the hando!er is not perceptible to the user. In practice a hando!er that requires a change of the carrier frequency Binter-frequency hando!er6 is always performed as hard hando!er. < $o)t ando+er Soft hando!er means that the radio lin2s are added and remo!ed in a way that the UE always 2eeps at least one radio lin2 to the UTR;*. Soft hando!er is performed by means of macro di!ersity$ which refers to the condition that se!eral radio lin2s are acti!e at the same time. *ormally soft hando!er can be used when cells operated on the same frequency are changed. < $o)ter hando+erSofter hando!er is a special case of soft hando!er where the radio lin2s that are added and remo!ed belong to the same *ode Bi.e. the site of co-located base stations from which se!eral sector-cells are ser!ed. In softer hando!er$ macro di!ersity with ma)imum ratio combining can be performed in the *ode $ whereas generally in soft hando!er on the downlin2$ macro di!ersity with selection combining is applied. < /enerally we can distinguish between intra-cell hando!er and inter-cell hando!er. :or UHTS the following types of hando!er are specified" < 9ando!er 3/ -3/ Bi.e. between UHTS and other 3/ systems6 < :88 soft?softer hando!er < :88 inter-frequency hard hando!er < :88?T88 hando!er Bchange of cell6 < T88?:88 hando!er Bchange of cell6 < T88?T88 hando!er < 9ando!er 3/ - (/ Be.g. hando!er to /SH6 < 9ando!er (/ - 3/ Be.g. hando!er from /SH6 The most ob!ious cause for performing a hando!er is that due to its mo!ement a user can be ser!ed in another cell more efficiently Bli2e less power emission$ less
interference6. It may howe!er also be performed for other reasons such as system load control. 6 4hat are types of measurements7 < ntra#)req&en"% meas&rements" measurements on downlin2 physical channels at the same frequency as the acti!e set. ; measurement obJect corresponds to one cell. < nter#)req&en"% meas&rements" measurements on downlin2 physical channels at frequencies that differ from the frequency of the acti!e set and on downlin2 physical channels in the acti!e set. ; measurement obJect corresponds to one cell. < nter#RT meas&rements" measurements on downlin2 physical channels belonging to another radio access technology than UTR;*$ e.g. /SH. ; measurement obJect corresponds to one cell. < Tra))i" +ol&me meas&rements" measurements on uplin2 traffic !olume. ; measurement obJect corresponds to one cell. < 6&alit% meas&rements" Heasurements of downlin2 quality parameters$ e.g. downlin2 transport bloc2 error rate. ; measurement obJect corresponds to one transport channel in case of 1ER. ; measurement obJect corresponds to one timeslot in case of SIR BT88 only6. < UE#internal meas&rements" Heasurements of UE transmission power and UE recei!ed signal le!el. < UE *ositionin meas&rements" Heasurements of UE position. '6 4hat is paging7 4hy paging is required7 .ain" This procedure is used to transmit paging information to selected UEs in idle mode$ CE11>0C9 or UR;>0C9 state using the paging control channel B0CC96. .ain "an be initiated " < Upper layers in the networ2 may request paging$ to e.g. establish a signaling connection. < UTR;* may initiate paging for UEs in CE11>0C9 or UR;>0C9 state to trigger a cell update procedure. < UTR;* may initiate paging for UEs in idle mode$ CE11>0C9 and UR;>0C9 state to trigger reading of updated system information. < UTR;* may also initiate paging for UEs in CE11>0C9 and UR;>0C9 state to release the RRC connection. ''6 Type of 0aging7 < 0aging Type ' < 0aging Type (BUE dedicated paging6 '(6 4hen dedicated paging is used7 a. This procedure is used to transmit dedicated paging information to one UE in connected mode in CE11>8C9 $ CE11>:;C9 or CE11>0C9 B:88 only6 state. Upper layers in the networ2 may request initiation of paging. b. :or a UE in CE11>8C9$ CE11>:;C9 or CE11>0C9 B:88 only6 state$ UTR;* initiates the procedure by transmitting a 0;/I*/ TK0E ( message on the 8CC9 using ;H R1C. 4hen not stated otherwise elsewhere$ the UTR;* may initiate the UE dedicated paging procedure also when another RRC procedure is ongoing$ and in that case the state of the latter procedure shall not be affected. c. UTR;* should set the IE ,0aging cause, to the cause for paging recei!ed from upper layers. If no cause for paging is recei!ed from upper layers$ UTR;* should set the !alue ,Terminating L cause un2nown,. '36 In what situation UE goes to CE11 0C9 and UR; 0C9 states7
a. Cell .C" This happens when UE doesnt require an acti!e ConnectionBcommon?dedicated6. ut still needs to be connected$ as its e)pecting a n?w initiated or terminated callBCS or 0S6 in future b. UR .C" In Cell 0C9 UE is still identified on cell le!el$ but now in the cell where UE made its last update$ when it was in CE11>:;C9 state.;t regular time inter!al$ UE would ha!e to mo!e in CE11>:;C9 state to update the location area. If UE is tra!eling$ this update will become frequent because of changing cells. If UE is tra!eling continuously from one cell to another. It would ha!e to transit multiple time to CE11>:;C9 state for location update. y assigning UR;>0C9 state$ this condition is a!oided$ since ' UR; contains one or more cells and !ice !ersa '#6 4hat is Cell Update 0rocedure7 4hat are !arious Cell Update causes7 < U*link data transmission: :or :88$ if the !ariable 9>R*TI is not set$ and for T88" if the UE is in UR;>0C9 or CE11>0C9 state and if the UE has uplin2 R1C data 08U or uplin2 R1C control 08U on R' or upwards to transmit" perform cell update using the cause ,&*link data transmission,. < .ain res*onse: if the criteria for performing cell update with the cause specified abo!e. are not met and if the UE in UR;>0C9 or CE11>0C9 state$ recei!es a 0;/I*/ TK0E ' .message fulfilling the conditions for initiating a cell update procedure. perform cell update using the cause ,*ain res*onse,. < Radio link )ail&re" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met" if the UE is in CE11>8C9 state and the criteria for radio lin2 failure are $or if the transmission of the UE C;0;I1ITK I*:=RH;TI=* message fails. perform cell update using the cause ,radio link )ail&re,. < M5M$ *t* R5 req&est" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met and if the UE is in UR;>0C9$ Cell>0C9 or Cell>:;C9 state and if the UE should perform cell update for HHS ptp radio bearer request$ perform cell update using the cause ,M5M$ *t* R5 req&est,. < Re#enterin ser+i"e area" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met and if the UE is in CE11>:;C9 or CE11>0C9 state and (Mgt if the UE has been out of ser!ice area and re-enters ser!ice area before T3+ or T3'+ e)pires" 3Mgt perform cell update using the cause ,re#enterin ser+i"e area,. < RLC &nre"o+erable error" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met and if the UE detects R1C unreco!erable error N'%O in an ;H R1C entity" perform cell update using the cause ,RLC &nre"o+erable error,. < Cell resele"tion"
if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met" if the UE is in CE11>:;C9 or CE11>0C9 state and the UE performs cell reselection or if the UE is in CE11>:;C9 state and the !ariable C>R*TI is empty" perform cell update using the cause ,"ell resele"tion,. < .eriodi"al "ell &*date" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met and if the UE is in CE11>:;C9 or CE11>0C9 state and if the timer T3 e)pires and if the criteria for ,in ser!ice area, and if periodic updating has been configured by T3 in the IE ,UE Timers and constants in connected mode, set to any other !alue than ,infinity," perform cell update using the cause ,*eriodi"al "ell &*date,. < M5M$ re"e*tion" if none of the criteria for performing cell update with the causes specified abo!e in the current subclause is met and if the UE is in UR;>0C9$ Cell>0C9 or Cell>:;C9 state and if the UE should perform cell update for HHS counting $ perform cell update using the cause ,M5M$ re"e*tion,. '6 4hat is ;cti!e set7 "ti+e $et is defined as the set of *ode-s the UE is simultaneously connected to Bi.e.$ the UTR; cells currently assigning a downlin2 80C9 to the UE constitute the acti!e set6. '%6 4hat is Honitor set and detected set Cells7 a. Cells$ which are not included in the acti!e set$ but are included in the CE11>I*:=>1IST belong to the Monitored $et. b. Cells detected by the UE$ which are neither in the CE11>I*:=>1IST nor in the acti!e set belong to the /ete"ted $et. Reporting of measurements of the detected set is only applicable to intra-frequency measurements made by UEs in CE11>8C9 state. '+6 4hat are the !arious types of R*C7 a. Ser!ing R*C b. 8rift R*C c. Controlling R*C '&6 4hat is the use and difference between CR*C$ 8rift R*C and SR*C7 R*C from which the UE is currently getting Ser!ed or connected to is called SR*C or Ser!ing R*C. 8uring a soft hando!er procedure the R*C UE is mo!ing to$ is called 8rift R*C. The R*C which controls the mo!ement of UE from Ser!ing R*C to the 8rift R*C is called Controlling R*C. '6 4hat is initial direct transfer message7 4hat is the use7 The initial direct transfer procedure is used in the uplin2 to establish a signaling connection. It is also used to carry an initial upper layer B*;S6 message o!er the radio interface. (6 4hat is security mode command7 4hy it is used7 Security mode command is a RRC Hessage$ The purpose of this procedure "
< To trigger the start of ciphering or to command the restart of the ciphering with a new ciphering configuration$ for the radio bearers of one C* domain and for all signalling radio bearers. < It is also used to start integrity protection or to modify the integrity protection configuration for all signalling radio bearers ('6 4hat is CCTrC97 ; Coded Composite Transport Channel is the result of combining Bmultiple)ing6 se!eral Transport Channels of the same type i.e." we can ha!e a CCTrCh made up of one or se!eral 8C9s$ a CCTrCh made up of 8SC9s. =ne e)ception is that we can ha!e one or se!eral :;C9s multiple)ed with a 0C9 on the same CCTrCh. ; better notation would be for e)ample" CCTrCh#8C9" ; CCTrCh consisting of # 8C9s CCTrCh3:;C9" ; CCTrCh consisting of 3 :;C9s CCTrCh0C9$(:;C9" ; CCTrCh consisting of the 0C9 and ( :;C9s ((6 4hat is compressed mode7 9igher layers can request a UE to monitor cells on other frequencies B:88$ T886$ or other systems B/SH6. This implies that the UE has to perform measurements$ on the other frequencies?systems and thus higher layers command the UE to enter Compressed Hode. The UTR;* need to send to the UE all the parameters for the Compressed Hode. Com*ression Methods: 4hen in Compressed Hode the information normally transmitted during a ' ms frame is compressed in time sothat gaps of adequate length are created. To achie!e this one of three mechanisms < .&n"t&rin This method is *=T applicable to downlin2. < $*read a"tor Red&"tion ;ctually hal!ing the Spread :actor. So with this method if S: is used in noncompressed frames then S:?( is used in the compressed frames. < iher La%er $"hed&lin 9igher 1ayers set restrictions so that only a subset of allowed T:Cs are used in Compressed Hode. Com*ressed Mode .arameter: T4$N BTransmission /ap Starting Slot *umber6" ; transmission gap pattern begins in a radio frame$ called firstradio frame of the transmission gap pattern$ containing at least one transmission gap slot. T/S* is the slot numberof the first transmission gap slot within the first radio frame of the transmission gap pattern P T4L1 BTransmission /ap 1ength '6" 8uration of the first transmission gap within the transmission gap pattern$ e)pressed in number of slots P T4L2 BTransmission /ap 1ength (6" 8uration of the second transmission gap within the transmission gap pattern$ e)pressed in number of slots. If this parameter is not e)plicitly set by higher layers$ then T/1( GT/1' P T4/ BTransmission /ap Start 8istance6" 8uration between the starting slots of two consecuti!e transmission gaps within a transmission gap pattern$ e)pressed in number of slots. The resulting position of the second transmission gap within its radio frameBs6 shall comply with the limitations of TS (.'' BRef N(O6. If this parameter is not set by higher layers$ then there is only one transmission gap in the transmission gap pattern
P T4.L1 BTransmission /ap 0attern 1ength6" 8uration of transmission gap pattern ' P T4.L2 BTransmission /ap 0attern 1ength6" 8uration of transmission gap pattern (. If this parameter is not e)plicitly set by higher layers$ then T/01( G T/01'. The following two parameters Bintegers6 control the transmission gap pattern sequence start and repetition" P T4.RC BTransmission /ap 0attern Repetition Count6" *umber of transmission gap patterns within the transmission gap pattern sequence :rom :igure ' it seems T/0RC is e!en$ therefore the number of slots in T/ Sequence is" .QT/0RC BT/01'@T/01(6 P T4CN BTransmission /ap Connection :rame *umber6" C:* of the first radio frame of the first pattern ' within the transmission gap pattern sequence. (36 4hat is :;C9 measurement occasion7 /;0s in S-CC0C9 to perform measurement on 8ifferent :requencies or Interrat resection. (#6 HI?S?SI details7 HI" The Scheduling of HI is Static. (6 4hy we perform Channelisation or spreading before scrambling7 efore sending a data we need to identify the channel to send the data. ; particular Channelisation code is the identity for the channel. 9ence we use Channelisation code to select the channel and then scramble it so as to send the identity of the UE o!er the channel (%6 4hen THSI $ 0- THSI $ IHSI $ IHEI used7 < THSI B/SH-H;06" The THSI B/SH-H;06 shall be chosen if a!ailable. The IE ,1;I, in the IE ,Initial UE identity, shall also be present when THSI B/SHH;06 is used$ for ma2ing it unique. < 0-THSI B/SH-H;06" The 0-THSI B/SH-H;06 shall be chosen if a!ailable and no THSI B/SH-H;06 is a!ailable. The IE ,R;I, in the IE ,Initial UE identity, shall in this case also be present when 0-THSI B/SH-H;06 is used$ for ma2ing it unique. < IHSI B/SH-H;06" The IHSI B/SH-H;06 shall be chosen if a!ailable and no THSI B/SH-H;06 or 0-THSI is a!ailable. < IHEI" The IHEI shall be chosen when none of the abo!e three conditions are fulfilled. (+6 4hat is ;uto attached7
;uto ;ttach 4hen 0ower =n
0S Call
Enabled If H*= I It will perform a combined ;ttach If *H=II It will do a 1;U and ;ttach.
8isabled
If UE is 1ocation updated i.e. SIH 1;I is same as Cell 1;I Then it will do nothing. If UE is not 1ocation updated i.e. SIH 1;I differs from the Cell 1;I then UE will perform 1ocation ;rea Update Same RRC connection can be used 4ill do a 0S attach then the 0S for the 0S call. call.
(&6 4hy we do a Combined ;ttach7 If the networ2 operates in *etwor2 Hode =f =peration I i.e. *H= I and /0RS HS that operates in Hode ; or Hode will do a simultaneous IHSI attach for /0RS and non /0RS ser!ices and shall use the Combined /0RS attach$ combined and periodic routing area updating procedures instead of the corresponding HH specific procedures IHSI attach and normal and periodic 1ocation area updating. (6 4hen UE triggers E!ent 3; Heasurement Report7 E!ent 3;"The Estimated uality of currently used UTR;* frequency is below a certain threshold and the estimated quality of the other system is abo!e a certain threshold. 36 9ow many transport channels will be configured when a CSA and a 0S8 call is simultaneously going on7 :i!e transport channels will be configured. ' for # SRs 3 for CSA ' for 0S8 3'6 4hen e!ent (;$ ($ (C$(E occurs7 E!ent (a" Change of best frequency E!ent (b" The estimated quality of the currently used frequency is below a certain threshold and the estimated quailty of a non-used frequency is abo!e a certain threshold. E!ent (c" The estimated quality of a non-used frequency is abo!e a certain threshold E!ent (d" The estimated quality of the currently used frequency is below a certain threshold E!ent (e" The estimated quality of a non-used frequency is below a certain threshold 3(6 4hen e!ent '; L ': E!ent occurs7 e!ent ';" ; 0rimary C0IC9 enters the reporting range e!ent '" ; primary C0IC9 lea!es the reporting range e!ent 'C" ; non-acti!e primary C0IC9 becomes better than an acti!e primary C0IC9 e!ent '8" Change of best cell e!ent 'E" ; 0rimary C0IC9 becomes better than an absolute threshold e!ent ':" ; 0rimary C0IC9 becomes worse than an absolute threshold 336 4here C and I gets generated7 In RRC C and I gets generated. 3#6 4here C and I gets stored7 In USIH C and I will get stored. 36 4here the Security procedure will start7 Security 0rocedure will start in RRC but Ciphering will start for ;H and UH data security procedure will start at R1C layer. ;nd for TH mode security procedure start at H;C layer. 3%6 4hat are the mandatory SIs which UE has to read before campign campaign7 SI '$ 3$$+$''
3+6 4hat are the important R;C9 parameters and which SI contains this information7 SI +? 3&6 4hich SI contains S criteria information7 SI 3
