SHARING OPTIMAND NCR DESCRIPTION

MS MODE BEHAVIORIDLE MODEDEDICATED MODE

Parameter related when idle mode :Cell Reselect Hysteresis ... (HYS)RxLev Access Min ... (RXP)Cell Reselect Offset ... (REO)

Parameter related when dedicated mode :Hand Over1. HO margin PBGT ... (PMRG)2. HO margin LEV ... (LMRG)3. HO margin QUAL ... (QMRG)4. HO Lev Umbrella ... (AUCL)5. RxLev Min Cell ... (SL)

For Improve : CSSR Traffic SharingFor Improve : CDR HOSR Traffic Sharing

Cell Reselect Hysteresis ... (HYS)Parameter to define received level hysteresis for required cell reselection, 0-14 dBRxLev Access Min ... (RXP)Parameter to define minimum RxLev MS has to receive for allowed access to cell, -110..-47 dBmCell Reselect Offset ... (REO)Parameter to define offset C2 reselection criteria for a cell, 0.. 126 dBHO margin PBGT ... (PMRG)Parameter to define threshold in the power budget process, handover margin prevents repeated handoverbetween adjacent cells, -24.. 63 dB HO margin LEV ... (LMRG)Parameter to define a threshold for a handover caused by signal level, -24.. 24 dBHO margin QUAL ... (QMRG)Parameter to define a threshold for a handover caused by signal Quality, -24.. 24 dBHO Lev Umbrella ... (AUCL)Parameter to define minimum signal level of an adjacent cell, when a handover is allowed to an adjacentumbrella cell, -110.. -47 dBmRxLev Min Cell ... (SL)Parameter to define the minimum signal level of an adjacent cell, when a handover is allowed to one of them.Directed Retry threshold (DRT)With this parameter you define the threshold value of the signal strength in the adjacent cell for the Directed Retry procedure. If the signal strength level in the cell is lower than this threshold value, adjacent cell is not accepted as a candidate in directed retry.110 .. -47 (dBm)

DESCRIPTION

Hysteresis Analogy

PMRG = | 6 def ] With this parameter you define a threshold in the power budget process. The handover margin prevents repeated handover between adjacent cells.The values range from -24 to 63 dB, changing with 1 dB step size. The default is 6 dB.Bersifatnya periodik selalu dievaluasi pd periodik tertentu base on measurmentEx PMGR=6 setelah periode pengecekan ada cell di evaluasi nilainya 7 db atau lebih dari source cell, maka neihgbor itu rankingnya jadi lebih tinggi.PMRG bekerjanya cuma men-sort kandidat neghbor dari level yang tertinggi s/d yang terendah di basic ranking LMRG = | 3 def ] With this parameter you define a threshold for a handover caused by signal level.The values range from -24 to 24 dB, changing with 1 dB step size. The default is 3 dB.kalau ada urgency handover due to low level...nanti dia akan pilih neighbors yang >= nilai LMRGEx LMRG= 3 saat decision handover dia akan pilih neighbor yang levelnya lebih besar 3db dari level sourcenya

QMRG = | 0 def ] With this parameter you define a threshold for a handover caused by signal quality.The values range from -24 to 24 dB, changing with 1 dB step size. The default is 0 dB.Sama seperti LMRG tapi kalau QMRG yang mentriger quality nya

RXLev min cell = SL With this parameter you define the minimum signal level of an adjacent cell, when a handover is allowed to one of them.The values range from -110 to -47 dBm. (RXLEV_MIN). The default is -100 dBm.

ZEAC: CREATE ADJACENT CELL PARAMETERS

REO MODIFYADCE MODIFYEX.. NCR ISSUED

BSS PARAMETER REVIEWCell selectionTo be selected by the cell selection procedure, a cell has to fulfill the C1 criterion C1>0, whereC1=AV_RXLEV rxLevAccessMin-Max(0,msTxPwrMaxCCH P)AV_RXLEV = 1/5*(RXLEV1+RXLEV2+...+RXLEV5)P=Maximum RF output power of the MSThis mean that the received downlink level has to be above a threshold (rxLevAccessMin)Cell ReselectionWhile moving within the radio network in idle mode, another cell may be more appropriate to serve the MS. Teherefore, cell reselection may be performedCell Reselection criterion C2 :C2=C1-cellReselectOffset for PT = 31C2=C1+cellReselectOffset-TOfor T

EXISTING IDLE MODE BEHAVIOUR Signal level for DCS1800 more not stable in DI area compare to GSM900 due RF propagation behaviour (higher frequency will have more signal fading loss) Possible to causing more SDCCH/TCH drop in DI area for DCS1800 Many Handover attempt due to level on DCS1800 (LDR=-90 dBm) With REO=3 make call dragging on DCS1800 make low signal level in customer perceive

Outdoor CoverageIndoor Coverage Signal level for DCS1800 more stable due to MS only camp on DCS1800 if rxlevel > -95 dBm No coverage missing due coverage GSM900 wider than DCS1800 Possible to reduce SDCCH/TCH drop on DCS1800 Reduce HO attempt due to Level on DCS1800In customer perceive, signal level on MS looking more stable

EXISTING HANDOVER MECHANISM SL=30 GSM900 DCS1800 if rxlevel on DCS1800 > -90 dBm DCS1800 GSM900 if rxlevel on GSM900 > -80 dBm

C1/C2 CALCULATION10 dBGSM=-80 dBmDCS=-90 dBmBSS ParametersGSM900 rxLevAccessMin=6 cellReselectOffset=0 DCS1800 rxLevAccessMin=15cellReselectOffset=10GSM900DCS1800

C1/C2 CALCULATIONGSM900C1=AV_RXLEV rxLevAccessMin-Max(0,msTxPwrMaxCCH P)C1= -80 (-104) = 24C2= C1+cellReselectOffsetC2= 24 + 0 = 24DCS1800C1=AV_RXLEV rxLevAccessMin-Max(0,msTxPwrMaxCCH P)C1= -90 (-95) = 5C2= C1+cellReselectOffsetC2= 5 + 10*2 = 25MS will camp on DCS1800.

C1/C2 CALCULATION10 dBGSM=-90 dBmDCS=-100 dBmBSS ParametersGSM900 rxLevAccessMin=6 cellReselectOffset=0 DCS1800 rxLevAccessMin=15cellReselectOffset=10DCS1800GSM900

C1/C2 CALCULATIONGSM900C1=AV_RXLEV rxLevAccessMin-Max(0,msTxPwrMaxCCH P)C1= -90 (-104) = 14C2= C1+cellReselectOffsetC2= 14 + 0 = 14DCS1800C1=AV_RXLEV rxLevAccessMin-Max(0,msTxPwrMaxCCH P)C1= -100 (-95) = -5C2= C1+cellReselectOffsetC2= -5 + 10*2 = 15Since C1 for DCS1800 < 0, MS will camp on GSM900.

BSS SIGNALING MESSAGESLocation Update (LOC_UPD) 1/4

Mobile Originating Call (MOC)

Mobile Terminating Call (MTC)

Internal Intra-cell Handover

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