Slide 1

CCSI_3G RNO BASIC TRAININGPrepare By: Peter Wylson Marpaung.3G TECHNOLOGY USING CDMAAll CDMA users occupy the same frequency at the same time! Frequency and time are not used as discriminators.CDMA operates by using CODES to discriminate between users.CDMA interference comes mainly from nearby users3G Spread data power using 3.84 Mchips/s bandwidth.

radio channel ReceiverAATransmitterSpreadingDespreadingData + NoiseAA23G TECHNOLOGY USING CDMAMany user after spread then combined to become a composite signal.At receiver, the composite signal have dispreading using a orthogonal code to separate the user data.

Many code channels are individuallyspread and then added together tocreate a composite signal33G TECHNOLOGY USING CDMABefore the spread result combined become a composite signal, it is processing using orthogonal code as differentiators at receiver next.

Orthogonal Code is: While result of multiplying and sum is 0Code1+1 -1 +1 +1 -1 +1 -1 -1Code2-1 +1 +1 -1 -1 +1 +1 -1Mul-1 -1 +1 -1 +1 +1 -1 +1Sum0OrthogonalCode1+1 -1 +1 -1 -1 +1 -1 -1Code2+1 +1 -1 +1 -1 -1 +1 -1Mul+1 -1 -1 -1 +1 -1 -1 +1Sum-2Non-orthogonalX4S1S2S1xC1S2XC2WSpreadingDespreading(S1xC1)+(S2xC2)Air Interface[S1xC1+S2xC2]xC2=S2[S1xC1+S2xC2]xC1=S1 N SC1xC2=0,C1,C2,orthogonalDirect spread technique53G POWER CONTROLTransmit power on all users must be carefully controlled so their signals reach the base station at the same signal level and at the absolute minimum power level necessary to ensure acceptable service quality.Interference in 3G are coming from UE (between User).Many user will causing Load IncrementMany user will causing increment of noise. Increment of Noise will degrade Ec/No.The purpose of DL power control: Saving power resource of NodeB, reducing interference to other NodeB.The purpose of UL power control: Overcoming Near-Far effect, save power of UE

Powerf

PowerfWRONG !!!!Every UE has different UL Power, this will cause capacity decrement and degradation of Ec/No due to Noise.BETTER !!!Power control technology will reduce the interference among each UEs and increase system capacity .63G POWER CONTROLThere are 3 type of power control in WCDMA:Open Loop Power Control.UTRAN Give Order to UE regarding initial power base on DL receive level (RSCP).

Close Loop Power Control * Inner Loop (Between UE and NodeB)NodeB and UE have discussion regarding current SIR compare to SIR Target. It will check for 1500times/second.Close Loop Power Control * Close Loop (Between RNC and NodeB)NodeB and RNC have discussion regarding current BLER compare to BLER Target. Result of discussion is inner loop SIR target adjustment.

73G POWER CONTROLClose Loop Power Control * Close Loop (Between RNC and NodeB at dedicated mode)NodeB and RNC have discussion regarding current BLER compare to BLER Target. Result of discussion is inner loop SIR target adjustment.BLER HIGH & Quality Low Increase SIRBLER Low & Quality High Decrease SIR

Close Loop Power Control * Inner Loop (Between UE and NodeB at dedicated mode)

SIR Target < Current SIR Reduce PowerSIR Target > Current SIR Increase Power

83G POWER CONTROLClose Loop Power Control * Inner Loop (Between UE and NodeB at dedicated mode)

SIR Target < Current SIR Reduce PowerSIR Target > Current SIR Increase Power

93G POWER CONTROLPower Control Also Triggered by 3G Cell System Load.Cell Load < CellUnderrunThd = Increase DL powerCell Load > CellOverrunThd = Decrease DL powerThis is called : Cell Breathing. System will adjust coverage to safe his system load balance.So it is the answer, why drive test result at Busy Hours and Non Busy Hours is totally different. Due to some blank spot, will causing drop service.

103G HandoverSoft handover Intra-RNC, inter-Node B Inter-RNCSofter handoverSame Node B, Inter- sector

Hard handover : Intra-frequency handover Inter-frequency handover Inter-system (3G&2G) Inter-mode (FDD&TDD)HandoverMOD UCELLINTERRATHOCOV:;MOD UCELLINTERFREQHOCOV:;MOD UCELLINTRAFREQHO:;113G Soft HandoverHandover

ASMNMNASMNMNSoft handover has more than 1 Radio Link Connection while handover event. Like UE touched by so many hand.123G Soft HandoverHandoverSoft handover has more than 1 Radio Link Connection while handover event. It have Active set (AS), Monitoring neighbor (MN) and DN (Detected neighbor) if founded.From above capture, it have :1. More than 1 AS (Means: He touched by 3 hand). 2. He has Some MN (Means: he has several neighbor created that detected during log file collection)3. He has 2 DN (Means: He has several uncreated neighbor relation that catch inside neighbor table.

133G Soft HandoverHandoverActive Set:The set of cells connected with UE;User information is transmitted from these cells.Monitor Set:The set of cells not within the active set but being monitored by a UE according to the adjacent node list allocated by UTRAN.Detect Set:The set of cells in neither the active set nor the monitor set.

143G Soft Handover EventHandover

Event 1A to Event 1D related to Active Set Activity.Event 1E and 1F related to Monitoring Set Activity.153G Soft HandoverHandoverUENodeBDRNS)DRNCNodeB(SRNS)MeasurementreportRL creation requestRL setup requestActive set update commandSRNCRL setup responseRL setup responseActive set update completionRL Deletion requestRL Deletion responseABActive set Update is the unique signaling for SHO.163G Soft HandoverHandover

Why we need T (Delay for trigger time) ?? Because to prevent unnecessary event activation.17TEMSEVENT 1A18

TEMSEVENT 1A19

TEMSEVENT 1B20

3G Soft HandoverHandoverConclusion:Event 1A is to add neighbor as active set. We can faster SHO with below parameter:MOD UCELLINTRAFREQHO: TrigTime1A= xx;Make xx to smaller value. So it will be faster execution. Be carefully: Too small value will cause ping pong SHO at several caseMOD UCELLINTRAFREQHO: IntraRelThdFor1ACSVP=xx, IntraRelThdFor1ACSNVP=xx, IntraRelThdFor1APS=xx;Make xx to bigger value. So it will more MN can be absorb. Be carefully: Too big value will cause service drop at several case

Event 1B is to remove an AS from active set list. We can faster and longer remove a cell from AS using above concept (Trigger time and Reporting range).

213G Hard HandoverHandover

ASHard handover has only 1 Radio Link Connection while handover event. UE already disconnected from the old Connection while setup a new connection are on progress.ASAS223G Hard HandoverHandoverUETarget NodeBSRNCOriginalNodeBMeasurement reportRL setup requestReconfiguration commandRL setup responseReconfiguration completionRL deletion requestRL deletion responseReconfigure command is the unique signaling for hard handover.233G hard Handover EventHandover

Compress Mode was activated and deactivated from 2D (Start Measure) and 2F (Stop Measure) Event. And he filter the other system candidate from event 3 activity.

243G hard Handover EventHandover

Attention please: If you put 2D at maximum value, then it will hard to share traffic from 3G to 2G. It will cause congestion in 3G and dragging in 3G edge coverage. So be carefully. And Using 2D and 2F parameter ypu can reduce system load and reduce Service drop.

253G WCDMA DictionaryRRC (Radio Resources Control) is a signaling and control protocol which make connection from UE to UTRAN which provides information transfer service to the NAS (Non Access Stratum).

UE need RRC setup for every service requested.

NBAPNode B Application PartRANAP: Radio Access Network Application PartRNSAP: Radio Network Subsystem Application PartRRC: Radio Resource ControlRNCCNNode BUERNCRANAPRNSAPNBAPRRC3G WCDMA DictionaryRAB (Radio Access Bearer) consist of RB (Radio Bearer) and RL (Radio Link). It connect UE to Core Network.

RB (Radio Bearer): The service provided by the Layer 2 for the transfer of user data between UE (User Equipment) and UTRAN (UMTS Terrestrial Radio Access Network).

RL (Radio Link): RL is a logical Connection between single UE (User Equipment) and a single UTRAN (UMTS Terrestrial Radio Access Network) access point.

3G CALL SETUP PROCESSAs mentioned before, UE need RRC setup for every 3G service requested. Afterward setup a RAB connection.

RRC Connection Setup Success RatioRAB Assignment Success Ratio3G CALL SETUP PROCESSCall Setup Success is Success to setup RRC Connection and Success setup RAB Connection.Call Setup Success Rate is RRC Setup Success Rate * RAB Setup Success Rate

Means: If you have 1 problem (RRC or RAB) then your CCSR become worst. Become more worst if both problem (RRC an RAB)UERNCCNRRC Connection RequestRRC Connection SetupRRC Connection CompleteDT Message ExchangeRadio Bearer SetupRAB Assignment RequestEstablished

Radio Bearer Setup CompleteRAB Assignment Response