Introduction to Optimization Tools

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Introduction to Optimization Tools

Top right corner for field-mark, customer or partner logotypes. See Best practice for example.

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Commercial in confidence Introduction to Optimization Tools 2005-09-272

3G Optimization Overview


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Optimization tools for 3G

Drive test Tools: TEMS Investigation, GENEX PROBE.

Post processing Tools:Actix, GENEX Asistant

KPI monitoring Tools:M2000, Genex Nastar


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Drive test ToolsTEMS Investigation used for 3G :Tool Settings &Requirements:

UE, Scanner(GPS,RF Antenna).UE connection is normal but for Scanner we have to lock on 3G Frequency

(DU=10662),Etisalat (10612,10587).

UE Setting & Purpose:The Scanner measures all SCs, whereas the UE only measures SC signals from the cells that the system has informed/ordered the UE through the BCH (neighbour list) or via the “measurement control” message.

•RSCP Active/Monitored Set•Carrier RSSI•Ec/No Active/Monitored Set•UL/DL Data Throughput•The BLER downlink•Pilot BER•Random Access Initial Tx Power•Random Access Preamble Count•Random Access Preamble Step•Random Access Tx Power•SIR target (UE dependent)•UE Tx Power •Call Statistic: AMR, CS and PS data calls


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Drive test Tool- TEMS InvestigationUE Setting & Purpose:

•Normal mode: In normal mode UE decide reselect or IRAT HO depending on radio conditions.•GSM Mode: UE can be lock on 2G•WCDMA mode:UE can be lock on 3G


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UE Properties:From Mobile properties we can also lock Scrambling code.Method:Goto tab---WCDMA cell selection ControlGoto tab-Function(click option Lock)Goto tab-source UARFCN(select operator freq:10662)Goto tab--to lock SC.

Drive test Tool- TEMS Investigation


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Scanner Purpose and Setting:The purpose of using the RF scanner is to be able to scan and measure all used

carriers/cells and their corresponding DL scrambling codes.

For low coverage areasFor antenna installation problemsFor missing neighboursFor coverage optimisationWith the scanner you can get the following info from the surrounding cells:

Different Scrambling codesCPCIH RSCP value (dBm)CPICH EcNo value (dB)



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Drive test Tool- TEMS Investigation UE WINDOW:AS=Active set (call camp on SC) & mearsementsMN=Monitor set( Neighboring SC) & mearmentsDN=Dectective set (Missing Neighbors ) & mearments

SCANNER WINDOW:Merriments on SC(Ec/Io,RSCP( Ag/Peack Ec))

EcIo=is the chip energy we obtain in presence of interference created by all users.EcNo=is the chip energy we obtain in presence of interference created by all Node B..


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Drive test Tool- TEMS InvestigationData Testing Settings and function(HSPA testing)

Huawei Data card required like edge stick in 2G for HSPA (high speed packet access) testing.HSPA Testing(HSDPA/HSUPA testing)HSDPA=High speed downlink packet access.HSUPA=High speed uplink packet access.

Max PDSCH codes=15But depends on RF condition and no of codes available.In this case Max no of codes assigned to one user=10

Modulation Scheme used during HSDPA testing.

CQI=channel quality index(depends upon EcIo

Shows HSDPA is active on Cell

MAX Throughput on downlink


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Drive test Tool- TEMS InvestigationData Testing Settings and function(HSPA testing).

HSDPA 1.8 MbpsThe maximum transport block size for 5 codes, QPSK is 3440 bits.The maximum physical layer throughput (ignoring re-transmissions and assuming scheduling in all TTI) would be 3440/0.002 = 1.72 MbpsThis can accommodate 10 MAC-d PDU of size 336 bits (payload of 320 bits).Thus maximum RLC layer throughput is 320*10/0.002 = 1.6 Mbps.Assuming a 10% MAC-hs re-transmission rate, this reduces to 1.6*0.9 = 1.44 Mbps

HSDPA 3.6 MbpsThe maximum transport block size for 5 codes, 16QAM is 7168 bits.The maximum physical layer throughput (ignoring re-transmissions and assuming scheduling in all TTI) would be 7168/0.002 = 3.58 MbpsThis can accommodate 21 MAC-d PDU of size 336 bits (payload of 320 bits).Thus maximum RLC layer throughput is 320*21/0.002 = 3.36 MbpsAssuming a 10% MAC-hs re-transmission rate, this reduces to 3.36*0.9 = 3.024 Mbps




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Drive test Tool- TEMS InvestigationHSUPA setting & Testing:

Active means enable on the cell.modulation scheme.


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3G L3 messages-TEMS Investigation Idle Mode L3 Messages(Cell Selection/Reselection Methods.There are two procedure for cell selection.

Initial cell selection/Stored info cell selection.

Signaling procedures for cell selectionDescription1:The AS sends the NAS the cell selection information that includes the PLMN identity and all available registration areas. 2:The NAS sends the AS these registration areas. 3:The AS selects or reselects a cell in the selected registration area.


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3G L3 messages-TEMS InvestigationCell Reselection Procedure:After selecting a cell and camping on it, the UE periodically searches for a better cell according to the cell reselection criteria. The better cell is the most suitable one for the UE to camp on and obtain services. The QoS of this cell is not necessarily more satisfying. If finding such a cell, the UE selects this cell to camp on.

The system broadcasts the cell selection and reselection information within the cell through SIB3 to control the cell selection/reselection measurement for the UEs


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3G L3 messages-TEMS InvestigationL3 Idle mode messages and there descriptions.


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3G L3 messages-TEMS InvestigationL3 Idle mode messages and there descriptionsBCCH carries system information block (SIB). The system information elements are broadcast in SIBs. An SIB groups together system information elements of the same nature. Different SIBs have different characteristics, for example, their repetition rate and the requirements on UEs to re-read the SIBs..


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3G L3 messages-TEMS InvestigationCall Setup procedure

NBAP=Node B application pastRANAP=radio access application partRNSAP=radio network sub layer partRRC=Radio Resource connectionRAB=Radio access barrier


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3G L3 messages-TEMS InvestigationCall Setup procedure L3 messages in dedicated mode

RRC Connect procedure1:RRC Connection request2:RRC connection setup3:RRC Connect setup complete

Security mode/initial direct transfer modes

Up to this point CS/PS call setup having same procedure.

RAB assigned by CN depends upon the User Service request(CS/PS).


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3G L3 messages-TEMS InvestigationCall Setup procedure L3 messages in dedicated mode

Sf=spreading factor.Sf128=voice callSf256=control channelsSf16=HSDPA

SF DLBit Rate DL

[kbps]

8 384/25616 12832 6464 32

128 16256 0


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)

When receiving event 1A, event 1C, and event 1D, the RNC adds the target cells to the active set only when the CPICH Ec/Io of the target cells is higher than the absolute threshold Min quality THD for SHO.


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-L3 Messages Event 1A

UE send Nbrs list info for Event Trigger.


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-L3 Messages Event 1A:

Event 1A trigger. And AC count increase to 2


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-L3 Messages Event 1b




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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-L3 Messages Event 1B:

Event 1b trigger. And AC count decrease to 1


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-IRAT HO :

Handover from UMTS to GSM is a key feature of third generation wireless systems. It is usually based on measurements on GSM cells performed using compressed mode.Compressed mode start due to bad service quality ( EcNo /RSCP), extra interference, dense sys capability


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-IRAT HO :Layer 3 messages

Event 2d occur due to bad RSCP on UE and compressed mode start (UE start scanning other band for HO.


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3G L3 messages-TEMS InvestigationHO Procedures/Events (SHO)-IRAT HO :Layer 3 messages

IRAT HO occur.


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Scope of work-3G


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Scope of work-3GTesting Procedure:

New Single site Verification/ Swap Site/IBS testing Procedure :CS calls(Voice/Video calls),R99 calls ,MMS,SMS,HSDPA/HSUPA test ,Softer/soft/IRAT Handover.

Cluster drive procedure:CS calls(short calls)/R99 short calls/HSDPA testing(short/long call).


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Scope of work-3GSample Reports:

SOAR Report(for new site):

IBS Report:

Cluster Report(post swap):


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Scope of work-3GPre -Post Drive Analysis Reports(Problems and recommendations):


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THANKYOU

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Introduction to Optimization Tools