BO CO TI:TNG QUAN IDLE MODEGI K S:L MINH HINT SINH VIN:L TN THNH

NH NGHA V CH VIT TT NH NGHACamped on a cell:UE trong IDLE mode v hon thnh tin trnh cell selection /reselection v chn c cellCamped on any cell:UE trong IDLE mode v hon thnh tin trnh cell selection /reselection v chn 1 cell bt chp xc thc PLMNHome PLMN:l PLMN c MCC(mobile country code) v MNC(mobile network code) thuc nhn thc PLMN th ging nh MCC v MNC ca IMSIDRX cycle:khong thi gian c bit gia vic iu khin C hi tm gi cho 1 UE Paging Block Periodicity(PBP): chu k khi tm gi(vi FDD, PBP=1)Paging occasion: khung FDD , UE iu khin PICH vi gi tr C hi tm gi nh nhau trn khi tm giRadio Access Technology: loi cng ngh truy nhp c s dngRegistration Area: l vng m UE c th chuyn mng m khng cn phi thc hin ng k v tr(th tc ca NAS)Suitable cell:l cell m UE camp on, cell tha mn cc iu kinVistied PLMN of home country: l PLMN c MCC ca xc thc PLMN trng vi MCC ca IMSI CH VIT TTAS Access StratumBCCH Broadcast Control ChannelCN Core NetworkDRX Discontinuous ReceptionDSCH Downlink Shared ChannelFDD Frequency Division DuplexGC General Control (SAP)GPRS General Packet Radio SystemGSM Global System for MobileIMSI International Mobile Subscriber IdentityMCC Mobile Country CodeMM Mobility ManagementMNC Mobile Network CodeNAS Non-Access StratumPCH Paging ChannelPI Page IndicatorPICH Page Indication ChannelPLMN Public Land Mobile NetworkRAT Radio Access TechnologyRRC Radio Resource ControlSAP Service Access PointTDD Time Division DuplexUE User EquipmentUMTS Universal Mobile Telecommunications SystemUTRA UMTS Terrestrial Radio AccessUTRAN UMTS Terrestrial Radio Access Network

NH NGHA V MODEUE chia lm 2 trng thi chnh:idle mode v connect mode. S khc bit chnh gia 2 trang thi l idle mode khng chim ti nguyn v tuyn n UTRAN, connect mode chim 1 hay 1 vi ti nguyn n UTRAN.1.SO SNH Idle mode(paging area is known; paging needed) UE c nhn thc bi nhn thc ca NAS vi cc tham s IMSI, TMSI and P-TMSI and P-TMSI UTRAN khng c thng tin c nhn ca UEs(invidual information) trong idle mode (no RRC connection) Connected mode(cell or URA is known; RRC connection) connected mode c thit lp khi UTRAN thnh lp v duy tr thng tin c nhn ca UE (RRC connection) RRC connection c thnh lp gia UE v Serving RNC UE is ng nhp 1 nhn thc mng tm thi (U-RNTI v CRNTI) c s dng nh UE nhn thc trong knh vn chuyn(RACH, FACH, PCH) connected mode khng yu cu chim 1 ti nguyn knh vt l2.TNG QUAN IDLE MODEKhi UE khi ng, n s chn mng di ng mt t(PLMN) v UE tm cell ph hp trong PLMN cm li. Cc chun ca vic chn v chn li cell gia cc cng ngh truy nhp v tuyn(RATs) c nh gi qua cc chun v tuyn.cell c chn t PLMN cung cp cc dch v sn sng v bt ln knh iu khin.vic chn cell c bit n vi thut ngcamping on the cell.UE c ng k vi th tc ng k NAS trong khu vuecj ng k ca cell c chn Nu UE tm c 1 cell ph hp hn trong PLMN c chn,n s ri cell c v reselect cell mi,nu cell vng ng k(RA)mi,ng k v tr c tin hnhNu UE tm thy cell ph hp hn trong mt PLMN khc trong 1 khong thi (chu k),s xy ra reselect PLMNNu UE mt vng ph sng ca PLMN ng k, 1 PLMN mi s c chn(Automatic mode) hay1 chit th v PLMN no sn sng ca ngi dng s c dung chn PLMN(Manual mode)4 tc dng ca camping on 1 cell l UE c th nhn thng ti h thng t PLMN khi ng k, nu UE mun thnh lp 1 kt ni RRC, UE bt u vi khi to 1 truy nhp mng trn knh iu khin ca cell camp on nu PLMN nhn thng tin ng k ca cell, n bit c khu vc ng k ca cell camp on.PLMN c th gi tin nhn tm goi(paging)trn knh iu khin n tt c cc cell trong khu vc ng k(nu U trong IDLE mode).nu UE nhn c tin, n s hi p trn knh iu khin UE c th nhn dch v cell broadcastNu UE khng th tm ra cell thch hp hay USIM khng c chn vo hoc ng k v tr b li.Ue s c gng camp on 1 cell bt chp xc nhn PLMN v gii hn dch v(ch c th gi cuc gi khn cp)IDLE mode c chia lm 3 phn chnh PLMN selection v reselection cell selection v reselection ng k v tr

Hnh 1:tng quan cc tin trnh trong IDLE mode Trong IDLE mode c rt nhiu th tc c ti u ha , mt trong s l da vo thng s Eb/N c on thng s lin quan chn cell,nhm tit kim thi gian .chng ta khng i su vo ti ny trong ti liu 3.TH TC CHN V CHN LI PLMNKhi no:khi UE va c bt ln, UE s tra b nh v list PLMN trc v chn nu c hay nu l SIM mi hon ton n bt u chn PLMN theo cch kho xc tt c cc sng hin c.hoc UE i ti vng khng ph ca PLMN ang dng, th UE s khi ng qu trnh chn PLMN t nghoc nhn cng .

Trong UE,NAS a ra 1 yu cu xc minh s sng sang ca PLMN cho AS v AS thc hin r sot trn cc knh tr li cho NAS c chn PLMN hay khngUE nn duy tr 1 list cc PLMN c cho php.cc loi PLMN c cp php c th l GSM-Map,ANSI-41. C hai thng s chnh c yu cu trong chn PLMN l PLMN identified v IMSI da trn 1 s thng s nh PLMN cho php,lu lng cho php ca UE, v 1 s thng s khc.1 PLMN c th c th c chn theo cch t ng hay nhn cng. Mi PLMN trong list PLMN identified c th c xc thc bi PLMN identity(GSM_MAP) hay SID Trong ANSI-41, chn PLMN c miu t trn TIA/EIA/IS-2000.53.1)TIN TRNHGi s khng c Roaming, v trong iu kin hot ng tt , khng c trc trc g trn h thng v UE

UE qut tt c cc knh v tun band UTRA da trn lu lng ca n tm PLMN sng sng.Ue chn cell c tn hiu mnh nht(da th tc cell searchtrong FDD hay TDD )v c thng tin h thng(SIB) tm cell thuc PLMN no. Nu UE c th c PLMN identity , PLMN c hi p n NAS v cung cp cc iu kin c th: Cho cell FDD, o trn knh P-CPICH Ec/Io v P-CPICH RSCP c ln hn hay bng (tdb)dBmUE c th ti u ha cho cch tm kim ny bng cch lu li thng tin v tn s sng mang,cng nh cc thng tin v cell, code,. CELL SEARCHnh ni, nu UE khng c thng tin sng mang trn UTRAN, UE s qut ht cc tn s d c v tm tn hiu tt nht. (thng xy ra UE mi ng nhp s dng)nu UE c thng tin sng mang h thng,UE s th kt ni ti cell c c thch hp khng, nu khng th s qut tt c tn s tm li.c 3 bc trong

+ng b khe:bc ny UE c d liu trn knh P-SCH , dng m ng b s cp(PSC) t c ng b khe+ng b khung v m nhm xc thc:UE s dng knh S-SCH ,vi m ng b th cp (SSC) t c ng b khung v xc thc nhm+Xc thc m trn s cp(Primary Scramble code identification):s dng knh S-SCH , dng m trn c tm ra khi tm cell v t tng quan ca CPICH vi tt c cc m t c mc ch(nu UE nhn c thng tin v m trn cho vic tm kim, bc 2,3 rt n gin) PLMN SELECTIONSau khi thc hin xong ng k vo PLMN,v ng k v tr ch cn thit khi UE c kh nng s dng dch v yu cu. PLMN selection khng c thc hin khi khng c ng nhpUE s s dng cc thng tin lu trong SIM lien quan n PLMN selection nh "HPLMN Selector with Access Technology", "Operator controlled PLMN Selector with Access Technology", "User Controlled PLMN Selector with Access Technology", "Forbidden PLMNs", "Equivalent HPLMN" cng nhng danh sch u tin, PLMN thch hp c chn ra3.3)PHNG PHP THC HIN PLMN SELECTION:AUTOMATIC V MANUAL AUTOMATIC NETWORK SELECTION MODE PROCEDURE

Khi bt ngun,NAS chn PLMN c u tin cao nht,c th l PLMN cui cng c truy nhp trc khi tt. AS c yu cu tm cell thuc PLMN . thc hin tm kim nhanh v hiu qu ,AS s dng thng tin c lu v cell u tin trc khi tt. khi cell thuc PLMN c tm ra, cell c chn v NAS c thng bo v PLMN c tmGi s mi th hot ng trong tnh trang chun MANUAL NETWORK SELECTION MODE PROCEDUREUE nhn thc tt c cc PLMN sng sng h tr cho cng ngh truy nhp, c th gm c PLMN cmPLMN khng h tr dch v (dng knh PBCCH).sau PLMN s gp cc chun thc hin vic chn hay khng, vic la chn thc hin bi con ngi:+khi SIM khng cha d liu, ch chn EHPLMN sn sng c u tin cao nht+khi c cha d liu trong SIM, qut HPLMN theo u tin..HPLMN c th cung cp cho UE nhng thng tin v s sn sng ca PLMN cng nhng thng tin tham vn v h tr dch v, chuyn mng,..Khi UE VPLMN, UE qut user controlled PLMN selector hay operator controlled PLMN selector trong PLMN list v tm HPLMN hoc tm PLMN c u tin cao hn yu cu mode Automatic.C gi tr T c lu trong SIM(c th t 6 pht n 8 gi) quy nh thi gian UE s qut li tm HPLMN hay cc PLMN ph hp hn3.3)S Cc nhng s c xy ra trong PLMN selection+khng tm c cell thch hp+PLMN khng cho php+UE khng hp php+UE ang 1 VPLMN v khng c roaming c tha thun+khng tm thy PLMN thch hp

3.4)V DA) PLMN Selection, automatic mode, selected PLMN not found

bt u, AS gi n NAS 1 danh sch PLMN hin ang sn sng. Danh sch gm nhng PLMN sn sng v thng tin ca chng trong khu vc dch v. gi s PLMN c u tin cao nht c tm thy ,NAS yu cu AS chn ra cell trong PLMN ny. AS dng cc thng tin c lu trc tng tc.khi cell c tm thy, AS gi ch ti NAS bo tm c cell ph hpNu khng c cell no ph hp,AS gi li NAS 1 danh sch PLMN sn sng v yu cu NAS chn PLMN thay th tm thi v AS li tm kim cell ph hp3.5)VIC NHN THNG TIN H THNG(SYSTEM INFORMATION RECEPTION)Thng tin h thng(system information) c t chc theo cu trc cy , vi mc ch duy tr kt gia UE v UNTRAN cng nh iu khin ton b hot ng trong UTRAN., cung cp nhng thng tin thit yu giao tip vi UTRAN(chun o lng v tuyn, ch th c hi tm gi,thng tin ng truyn, )cc thng tin ny c truyn trn knh BCCH Thng tin h thng c t chc da trn: khi thng tin ch(MIB)cha tham vn v lch biu thng tin cho loi SIB trong cell,PLMN xc thc,loi PLMN..,ch c khi UE mun chn 1 celll khi nh thi(SB):cha thng tin tham vn v lch biu thng tin cho cc SIB khckhi thng tin h thng(SIB)cha thng tin cn bit v h thng, thnh phn thng tin h thng(IEs) vi chung mc ch

Trong 3GPP chun TS25.331 xc lp 17 loi SIBSIB1:cha thng tin cho NAS v timer/counter cho UE trong IDLE modeSIB2:cha thng tin cho URA SIB3:cha thng s cho cell selection v reselectionSIB4: cha thng s cho cell selection v reselection cho UE connect modeSIB5:cha thng s knh chung vt l ca cellSIB6:cha thng s cho knh chung vt l ca cell trong connect modeSIB7:cha tng giao din uplink v refersh timer cho SIBSIB11:cha thng tin o lng v iu khin ..

4)cell selection v reselection 4.1)Th tc cell selection/cell reselection: Mc ch: cho php UE tm kim mt cell ph trong PLMN c chn v camp vo n. Qu trnh thc hin cell selection v cell reselectio:

Hnh 5:cc bc chn cell trong IDLE mode Th tc chn cell c thc hin khi:+ Khi UE mi khi ng.+ Khi UE nm trong idle mode v kt ni RRC tht bi.+ Khi UE t connect mode CELL_FACH tr v idle mode sau khi update cell tht bi.+ Khi UE chuyn t CELL_DCH sang idle mode.+ Khi UE tr v idle mode sau mt cuc gi khn cp. Th tc chn li cell c thc hin khi: + Cell ang phc v cho UE khng cn ph hp.+ UE ang Camped normall thy cell k bn tt hn.+ UE ang Camped on any cell. Mt s khi nim:+ Acceptable cell: cell m UE camp vo nhng ch s dng c mt vi dch v: cuc gi khn cp, EWTS, CMAS.+ Suitable cell: cell m UE camp v s dng c cc dch v bnh thng. Vic la chn cell c thc hin theo hai th tc sau:+ Initial cell selection: th tc ny c thc hin khi khng c thng tin ca cell lu tr PLMN. UE s qut tt c cc knh v tuyn tm suitable cell trong PLMN c chn.+ Stored information cell selection: UE s s dng cc thng tin v cell c lu trc tm suitable cell. Nu vn cha tm c suitable cell th th tc UE s khi ng th tc initial cell selection.4.2)Chun la chn cell: Chun S:iu kin: Srxlev > 0 v Squal > 0.Squal = Qqualmeas Qqualmin.Srxlev = Qrxlevmeas Qrxlevmin Pcompensation.Squal : cht lng ca cell (dB).Srxlev : mc thu c ca cell (dBm).Qqualmeas : mc o cht lng cell. Cht lng ca tn hiu nhn c trn knh CPICH Ec/No ca cell hin ti.Qqualmin : mc cht lng cell thp nht theo yu cu.Qrxlevmeas : gi tr o c ca mc thu ca cell. CPICH RSCP ca cell hin hnh.Qrxlevmin : gi tr yu cu ca mc thu ca cell.Pcompensation = max(PEmax - Ppowerclass , 0).PEmax : mc cng sut pht ti a ca UE c th s dng truy nhp vo cell trn knh RACH (thng tin ny c c trong h thng) (dBm).Pmax : mc cng cut v tuyn u ra ln nht ca UE (dBm). Sau khi chn c cell, UE s tm kim mt cell tt hn theo nh k. Nu tm thy cell tt hn th n s chn li cell ny.4.3)Chn li cell:Tnh ton cc gi tr:Rs = Qmeas,s + Qhysts : gi tr xp hng ca cell hin ti.Rn = Qmeas.n Qoffset s,n : gi tr xp hng ca cell bn cnh.Nu Rs > Rn : khng chn li cell.Nu Rs < Rn : Chn li cell k bn.4.4) V DNAS Controlled Cell Selection4.4.1) thc hin trongAccess Stratum

Hnh :NAS iu khin vic chn cell, thc hin trong ASNAS rt thng dng trong vic la chn v chn li cell bng vic gi thng tin iu khin ti AS vi cc thng tin nh anh sch RA cm,danh sch dch v c u tin bi NAS+cell thuc RA cm ch c chn nu khng c cell no tt hn, v cc dch v cng b hn ch+cell c dch v c NAS u tin hn vi dch v hin ti s c quan tm tm hn.ph thc vo mode truy nhp v tuyn, cell ph hp nht IDLE mode c th khng phi cell ph hp nh connect mode4.4.2) THC HIN BI NAS Hnh : NAS iu khin vic chn cell , thc hin bi NASAS s gi thng tin la chn cho NAS bao gm nhiu thng tin PLMN identity,RA,trng hp ny ch xy ra khi UE pht hin cell ln cn thc 1 RA(registration area) mi.danh sch c duyt bi NAS c gi li cho AS chn cell.5) NG K V TR (LOCATION REGISTRATION)5.1) TNG QUTKhi UE bt ln v yu cu 1 dch v, lot giao thc ng k v tr c khi hot C s hin din ca SIM v khng cn ng k v tr(thng tin c trong b nh..)UE s cp nhp UPDATED C s hin din ca SIM v cn ng k v tr:yu cu dng k v tr c gi Khng c SIM:UE cp nhp vo trng thi ri, khng c IMSIng k v tr gm 2 loi Cp nhp v tr(cho h thng cao hn GPRS) Cp nhp nh tuyn (cho GPRS)5.2)KHI TO NG K V TR1 yu cu ng k v tr s c ch vo cp nhp bnh thng(Normal Updating) khi, trong IDLE mode: UE thay i cell Ue d v ng nhp vo khu dng k mi(RA), khi xc thc RA nhn c khc vi gi tr ang lu v LAI hay PLMN identity khng c trong bt k danh sch forbidden LAs for roaming", "forbidden LAs for regional provision of service", "forbidden PLMNs for GPRS service" or "forbidden PLMN no th thwucj hin update cho UE vi yu cu -UPDATED; - NOT UPDATED; - ROAMING NOT ALLOWED. Ti chu k cp nhp v tr(periodic location updating timer) UE thc hin cp nhp(nonGPRS) Ti chu k cp nhaapj nh tuyn(periodic routing updating timer)UE thwucj hin cp nhp(GPRS) Vic chn mng bng tay c thc hin,cell c chn PLMN , UE thc hin cp nhp

Ti liu tham kho1-Universal Mobile Telecommunications System (UMTS); UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected Mode(3GPP TS 25.304 version 3.5.0 Release 1999)2- OWJ200104 WCDMA Paging Procedure and Problem Analysis ISSUE 1.03- 3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (Release 8)4- WCDMA RAN Planning and Optimization (Book3(1) Features and Algorithms)/WCDMA UE Behaviors in Idle Mode5-UMTS Networks Architecture Mobility and Services by Heikki Kaaranen 20056- UE-UTRAN Signalling Protocols by Alexander Seifart