10 parameter optimisation hw
DESCRIPTION
optimization for Huawei parametersTRANSCRIPT
Huawei Confidential. All Rights Reserved
Parameters Optimization
ISSUE 1.0
2 Internal Use
Review Review
Parameters Optimization is an important step after RF Optimization
Service quality and network resources utilization will be improved after Parameters Optimization
3 Internal Use
ReviewReview
New Sites Intergrated
Single Site Verification
Cluster of Sites ready?
RF Optimisation
Services Testing & Parameter Optimisation
Regular Reference RouteTesting & Stats Analysis
Re- optimisation Needed?
YES
NO
YES
NO
4 Internal Use
ObjectivesObjectives
Upon completion this course, you will be able to:
Understand the procedure of Parameters Optimization
Master the contents of Parameters Optimization.
5 Internal Use
Chapter 1 Chapter 1 Parameters Optimization Parameters Optimization ProcedureProcedureChapter 2 Chapter 2 Parameters Optimization Parameters Optimization ContentContent
6 Internal Use
Parameters Optimization ProcedureParameters Optimization Procedure
Data Input and Find Problems
Verify Parameter Problems
Other ProcessClassify Parameter Problems
Determine Parameter Values to be Modified and List MML Commands
Evaluate Changing Effects
Prepare Test Plan and Implement Changing
Test , Get Data again and Compare
Problems Eliminate Or Need not Change more
End
Determine whether Changing
End
N
N
Y
Y
Y
N
7 Internal Use
Data Input and Find ProblemsData Input and Find Problems
Data Input
Drive Test Data
KPI Network Statistic Data
Network Tracing Message
Network Warning Information
Problems
Use Input Data to find out the Problems such as - Call Setup Success Rate Low - Handover Success Rate Low - Drop Call Rate High etc.
8 Internal Use
Verify Parameter ProblemsVerify Parameter Problems
Parameter Problems
No RF Problems
No Hardware/Software Problem
Related with EnvironmentOr Speed
Parameters never OptimizedBefore
9 Internal Use
Classify Parameter ProblemsClassify Parameter Problems
Mobile Management Parameter Problems Power Control Parameter Problems Power Configuration Parameter Problems Load Control Parameter Problems Other Parameter Problems
10 Internal Use
Determine Parameter ValuesDetermine Parameter Values
List Parameters Changing Form Original Parameter Values vs. New Parameter Values List Parameters Changing MML Command
11 Internal Use
Evaluate Changing InfluenceEvaluate Changing Influence
Evaluate influence on Customer Service and Other Networks
Evaluate influence on OMC ( Efforts , Maintenance)
12 Internal Use
Prepare Test Plan and Implement ChangingPrepare Test Plan and Implement Changing
Prepare Test schedule , Routes, Tools and be ready to get Information .
Change Parameters and Make Records.
13 Internal Use
Chapter 1 Chapter 1 Parameters Optimization Parameters Optimization ProcedureProcedureChapter 2 Chapter 2 Parameters Optimization Parameters Optimization ContentContent
14 Internal Use
Chapter 2 Parameter Optimization ContentsChapter 2 Parameter Optimization Contents
1. Cell Selection & Reselection
2. Handover
15 Internal Use
Parameters Optimization ContentsParameters Optimization Contents
Mobile Management Parameters Optimization Power Control Parameters Optimization Power Configuration Parameters Optimization Load Control Parameters Optimization
Note: Because there are a lot of parameters , it is not possible to introduceevery parameter . Only some parameters about network optimization are mentioned here and maybe more parameters need to be added in the future.
16 Internal Use
Mobile Management Parameters OptimizationMobile Management Parameters Optimization
Cell Selection & Reselection Cell Selection & Reselection - Only for UE in Idle more or Cell_FACH, CELL_PCH and URA_PCH
- Changing of cell on which UE camped on, - To ensure UE is always connected to the best serving cell to receive system information and establishing RRC connection
HandoverHandover - Changing cell for UE in CELL_DCH mode
- Ensure seamless coverage and load balancing.
17 Internal Use
Cell Selection & Reselection ProcedureCell Selection & Reselection Procedure
InitialCell Selection
Any CellSelection
go herewhen noUSIM inthe UE
USIM inserted
Camped onany cell
go here whenever anew PLMN is
selected
1no cell information
stored for the PLMNcell information
stored for the PLMN
Storedinformation
Cell Selectionno suitable cell found
no suitablecell found
Cell Selectionwhen leaving
connectedmode
suitable cell found 2
suitablecell found
Campednormally
suitable cell found
no suitablecell found
leaveidle mode
return toidle mode
Connectedmode
CellReselectionEvaluationProcess
suitablecell found
trigger
no suitablecell found
1
Cell Selectionwhen leaving
connectedmode
no acceptable cell found
acceptablecell found
acceptablecell found
suitablecell found 2
leaveidle mode
return toidle mode
Connectedmode
(Emergencycalls only)
CellReselectionEvaluationProcess
acceptablecell found
trigger
no acceptablecell found
NAS indicates thatregistration on selected
PLMN is rejected(except with cause #14
or #15 [5][16])
18 Internal Use
Cell Selection Criteria (S Criteria)Cell Selection Criteria (S Criteria)
The cell selection criterion S is fulfilled when:The cell selection criterion S is fulfilled when:
for FDD cells: Srxlev > 0 AND Squal > 0
for TDD cells: Srxlev > 0
Where:
Squal = Qqualmeas – Qqualmin
Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation
When UE wants to select an UMTS cell , the cell should satisfy S Criterion.
19 Internal Use
Cell Selection ParametersCell Selection Parameters
20 Internal Use
Cell Re-selection Measure ConditionCell Re-selection Measure Condition
Uses Squal for FDD cells and Srxlev for TDD for Sx
Sx > SintrasearchSx > Sintrasearch, UE need not perform intra-frequency measurements.
Sx <= SintrasearchSx <= Sintrasearch, perform intra-frequency measurements.If Sintrasearch is not sent for serving cell, perform intra-frequency measurements.
Sx > SintersearchSx > Sintersearch, UE need not perform inter-frequency measurements.
Sx <= SintersearchSx <= Sintersearch, perform inter-frequency measurements.If Sintersearch, is not sent for serving cell, perform inter-frequency measurements.
Sx > SsearchRAT mSx > SsearchRAT m, UE need not perform measurements on cells of RAT"m".
If Sx <= SsearchRAT mIf Sx <= SsearchRAT m, perform measurements on cells of RAT "m".If SsearchRAT m, is not sent for serving cell, perform measurements on cells of RAT "m".
21 Internal Use
Cell Reselection Criteria (R Criteria)Cell Reselection Criteria (R Criteria)
1) All cells satisfy S Criteria. 2) Select the Cell with the highest R value using the following method:
Cells are ranked according to the R criteria.R values are calculated using CPICH RSCP, P-CCPCH RSCP and the averaged received signal level for FDD, TDD and GSM cells, respectively.In all cases, the UE shall reselect the new cell, only if the following conditions are met:
- New cell is better ranked than the serving cell during a time interval Treselection.- More than 1 second has elapsed since UE camped on the current serving cell.
RRss = Q= Qmeas,smeas,s + Q+ Qhyst, shyst, s
RRnn = Q= Qmeas,nmeas,n - Q- Qoffset, s,noffset, s,n
22 Internal Use
Cell Reselection ParametersCell Reselection Parameters
23 Internal Use
Cell Reselection ParametersCell Reselection Parameters
24 Internal Use
Chapter 2 Parameter Optimization ContentsChapter 2 Parameter Optimization Contents
1. Cell Selection & Reselection
2. Handover
25 Internal Use
Handover ProcedureHandover Procedure
Node B
Node B
Node B
Intra-frequency cells
–Neighbor cells both from same NodeB or other NodeBs
Measurement report
Handover decision
measurement control
Measurement and filtering
Handover execution
26 Internal Use
Soft Handover ExampleSoft Handover Example
27 Internal Use
Soft Handover ProcedureSoft Handover Procedure
28 Internal Use
Soft Handover Event – 1ASoft Handover Event – 1A
1A (Add a cell in Active Set)1A (Add a cell in Active Set)
)2/(10)1(1010 111
aaBest
N
iiNewNew HRLogMWMLogWCIOLogM
A
MNew : Measurement result of cell entering the reporting range.CIONew : Cell individual offset for the cell entering the reporting range if an individual cell offset is stored for that cell. Otherwise it is equal to 0.Mi : Measurement result of a cell not forbidden to affect reporting range in the active set.NA : The number of cells not forbidden to affect reporting range in the current active set.MBest : Measurement result of the cell not forbidden to affect reporting range in the active set with the highest measurement result, not taking into account any cell individual offset.W : Parameter sent from UTRAN to UE.R1a : Reporting range constant.H1a : Hysteresis for the event 1a.
29 Internal Use
Soft Handover Event – 1BSoft Handover Event – 1B
1B (Remove a cell from Active Set)1B (Remove a cell from Active Set)
)2/(10)1(1010 111
bbBest
N
iiOldOld HRLogMWMLogWCIOLogM
A
MOld : Measurement result of the cell leaving the reporting range.CIOOld : Cell individual offset for the cell leaving the reporting range if an individual cell offset is stored for that cell. Otherwise it is equal to 0.Mi : Measurement result of a cell not forbidden to affect reporting range in the active set.NA : Number of cells not forbidden to affect reporting range in the current active set.MBest : Measurement result of the cell not forbidden to affect reporting range in the active set with the lowest measurement result, not taking into account any cell individual offset. W : Parameter sent from UTRAN to UE.R1b : Reporting range constant.H1b : Hysteresis for the event 1b.
30 Internal Use
Soft Handover Event – 1CSoft Handover Event – 1C
1C (A non-active primary CPICH becomes better than an active primary CPICH. If Active Set is not full ,add the non-active cell into active set .Otherwise use the cell substitute the active cell . )
2/1010 1cInASInASNewNew HCIOLogMCIOLogM
MNew : Measurement result of the cell not included in the active set.CIONew : Cell individual offset for the cell becoming better than the cell in the active set if an individual cell offset is stored for that cell. Otherwise it is equal to 0.MInAS : Measurement result of the cell in the active set with the highest measurement result.MInAS : Measurement result of the cell in the active set with the lowest measurement result.CIOInAS : Cell individual offset for the cell in the active set that is becoming worse than the new cell.H1c : Hysteresis parameter for the event 1c.
31 Internal Use
Soft Handover Event – 1DSoft Handover Event – 1D
1D (Change of best cell. If the chosen cell is not in Active Set , add the cell into Active Set and modify measurement control .Otherwise only modify measurement control. )
2/1010 1dBestBestNotBestNotBest HCIOLogMCIOLogM
MNotBest : Measurement result of a cell not stored in "best cell" CIONotBest : Cell individual offset of a cell not stored in "best cell" .MBest: Measurement result of the cell stored in "best cell".CIOBest : Cell individual offset of a cell stored in "best cell" .H1d : Hysteresis parameter for the event 1d.
32 Internal Use
Soft Handover ParametersSoft Handover Parameters
Parameter NameParameter Name DescriptionDescription Default SettingDefault Setting
IntraRelThdFor1A Relative thresholds of soft handover for Event 1A (R1a) 10 , namely 5dB (step 0.5)
IntraRelThdFor1B Relative thresholds of soft handover for Event 1B (R1b) 10 , namely 5dB (step 0.5)
Hystfor1A, Hystfor1B, Hystfor1C, Hystfor1D
Soft handover hysteresis (H1x) 6,namely 3dB (step 0.5) for H1a .8,namely 4dB(step 0.5) for H1b, H1c,H1d.
CellIndividalOffset Cell CPICH measured value offset; the sum of this parameter value and the actually tested value is used for UE event estimation. (CIO)
0
WEIGHT Weighting factor, used to determine the relative threshold of soft handover according to the measured value of each cell in the active set.
0
TrigTime1A,TrigTime1B, TrigTime1C,TrigTime1D
Soft handover time-to-trigger parameters (event time-to-trigger parameters. Only the equation are always satisfied during the trigger time, the event will be triggered).
D640, namely 640ms .
FilterCoef Filter coefficient of L3 intra-frequency measurement D5 ,namely 5
33 Internal Use
Intersystem Handover – CS Domain ProcedureIntersystem Handover – CS Domain ProcedureUE
1. RRC Connect Req
15. RAB Assign Req
NODEB RNC 3G MSC BSS2G MSC
2. RRC Setup Complete
3. Measure Control (measure ID 0x1 ) 4. Measure Control (measure ID 0x2 )
5.Initial UE message(service request)6.DL DT (Authentication Request)7.UL DT (Authentication Response)
8.Common ID
9. Security Mode Command10. Security Mode Command11. Security Mode CMP
12. Security Mode CMP13. UL DT(Setup)14. DL DT(Call proceeding)
17.RL Recfg Ready
21 RAB Assign Resp20 RB Setup Cmp19 RB Setup
16.RL Recfg Prep
18.RL Recfg Commit
22. DL DT( Alerting )23. DL DT( Connect)24. UL DT(Connect Ack)
26.RL Recfg Prep26.RL Recfg Prep
28 PhyCh Reconfig28 PhyCh Reconfig29.RL Recfg Comit29.RL Recfg Comit
27.RL Recfg Ready27.RL Recfg Ready
30 PhyCh Reconfig CMP30 PhyCh Reconfig CMP31 Meaure Control(ID3 )
32Measure Report 33 Relocation Required34 Relocation Command
35. HandoverFromUtranCommand44 Iu Release Req
46 RL Del Resp45 RL Del Req
47 Iu Release Complete
25 Measure Report(2D)
34 Internal Use
Intersystem Handover MeasureIntersystem Handover Measure
1)1) Inter-frequency measurement reporting Event 2D ,2FInter-frequency measurement reporting Event 2D ,2F
to reflect the currently used frequency quality.
Event 2d:Event 2d: The estimated quality of the currently used frequency is below a certain threshold.
The variables in the formula are defined as follows:
QUsed : Quality estimate of the used frequency. TUsed 2d : The absolute threshold that applies for the used frequency and event 2d. H2d : Hysteresis parameter for the event 2d.
Event 2fEvent 2f: The estimated quality of the currently used frequency is above a certain threshold.
The variables in the formula are defined as follows:
QUsed : The quality estimate of the used frequency. TUsed 2f : The absolute threshold that applies for the used frequency and event 2f. H2f : Hysteresis parameter for the event 2f.
2/22 ddUsedUsed HTQ
2/22 ffUsedUsed HTQ
35 Internal Use
Intersystem Handover MeasureIntersystem Handover Measure 2) RNC Receive 2D reportsRNC Receive 2D reports ( i.e current serving carrier signal is poor ) :
- RNC sends Measurement Control (ID3); Allow UE to begin measure other system signal. - UE will send measurement result reports periodically
- When Received 2F reports ( i.e current serving carrier signal is no longer poor), RNC sends Measurement Control (ID3, but different contents) to let UE stop measuring other system signal .
3) When RNC received periodical reports ,RNC use the following formula to judge whether it should handover UE to another system .
MMother_RAT other_RAT + CIO > T+ CIO > Tother_RATother_RAT + H/2 + H/2
Tother_RAT : Inter-system handover decision threshold
Mother_RAT : Inter-system (GSM RSSI) measurement result received by RNC
CIO : Cell Individual Offset, which is the inter-system cell setting offset; H : Hysteresis,
If the formula is met, a trigger-timer called TimeToTrigForSysHo will be started, and a handover decision will be made when the timer expires;
Note: If inter-system quality satisfies the following condition before the timer expires: Mother_RAT + CIO < Tother_RAT - H/2Mother_RAT + CIO < Tother_RAT - H/2 timer will stopped, and RNC will waiting to receive the next inter-system measurement report.
36 Internal Use
Intersystem Handover ParametersIntersystem Handover Parameters
37 Internal Use
Parameters Optimization ContentsParameters Optimization Contents
Mobile Management Parameters Optimization Power Control Parameters Optimization Power Configuration Parameters Optimization Load Control Parameters Optimization
38 Internal Use
Power Control Parameters OptimizationPower Control Parameters Optimization
Power Control Characteristics
Minimize the interferenceMinimize the interference in the network, thus improve capacity and quality
Maintain link qualityMaintain link quality in uplink and downlink by adjusting the powers
Overcome near far effectOvercome near far effect by providing minimum required power level for each connection
Provides protection against shadowing and fast fadingprotection against shadowing and fast fading
39 Internal Use
Power Control ClassificationPower Control Classification
UE NodeB RNC
SIR Target
Bler/BerSIR
TPC Command
Outer Loop Power ControlInner Loop Power Control
Open Loop Power Control
Open Loop Power ControlOpen Loop Power Control To determine UE’s initial uplink transmit power in PRACH and NodeB’s initial downlink transmit power in DPDCH.
Outer Loop power controlOuter Loop power control To maintain the quality of communication at the level of bearer service quality requirement, while using power as low as possible.
Inner loop power control (also called fast closed loop power controlInner loop power control (also called fast closed loop power control To adjust UE’s uplink / NodeB’s downlink DPCH. Power of every one slot in accordance with TPC commands. Inner loop power control frequency is 1500Hz
40 Internal Use
Open Loop Power Control - UplinkOpen Loop Power Control - Uplink
BCH£ ºCPICH channel powerBCH£ ºCPICH channel power UL interference leve UL interference leve Constant Value Constant Value
Measure CPICH_RSCP Measure CPICH_RSCP and determine the initial and determine the initial transmitted power transmitted power
RACHRACH
Preamble_Initial_Power = Primary CPICH TX power - CPICH_RSCP Preamble_Initial_Power = Primary CPICH TX power - CPICH_RSCP + UL interference + Constant Value+ UL interference + Constant Value
Primary CPICH TX power , UL interference and Constant Value are broadcasted in the System Informationand CPICH_RSCP is the measured value by UE 。
41 Internal Use
Open Loop Power Control - DownlinkOpen Loop Power Control - Downlink
DCHDCH
Measure CPICH Ec/I0Measure CPICH Ec/I0
RACH reports the RACH reports the measured valuemeasured value
Determine the downlink initial power Determine the downlink initial power controlcontrol
RR : User bit rate. W W : Chip rate (3.84M).PcpichPcpich : Primary CPICH transmit power. Eb/IoEb/Io : Downlink Eb/Io required value for a bearer service.(Ec/Io)cpich(Ec/Io)cpich : Measurement value reported by the UE. : Downlink cell orthogonal factor.Ptotal Ptotal : Current cell’s carrier transmit power measured at the NodeB and reported to the RNC.
))/(( totalo
cCPICH
o
b PcpichIEP
WR
IEP
42 Internal Use
Open Loop Power Control ParametersOpen Loop Power Control Parameters
43 Internal Use
Outer Loop Power ControlOuter Loop Power Control
SRNC DRNC
Set SI R Set SI R targettarget
Set SI R targetSet SI R target
Set SI R targetSet SI R target
Macro di versi ty Macro di versi ty combi ni ngcombi ni ng
Used to setting SIRTarget for inner loop power control.
Uplink outer loop power control is controlled by SRNC (serving RNC) for setting a target SIR for each UE. SIRTarget is updated according to the estimated uplink quality (Block Error Ratio/ Bit Error Ratio). If UE is not in DTX status (that means RNC can receive uplink traffic data), RNC uses BLER to compute SIRTarget . Otherwise , RNC will use BER to compute SIRTarget.
Downlink outer loop power control controlled by UE receiver; to converge to required link quality (BLER) set by the network (RNC) in downlink.
44 Internal Use
Outer Loop Power Control ParametersOuter Loop Power Control Parameters
45 Internal Use
Inner Loop Power ControlInner Loop Power Control
Divided into uplink and downlink inner-loop power control
Purpose to adjusts UE or NodeB transmit power, to keep the received SIR to be around SIR target.
46 Internal Use
Uplink Inner Loop Power ControlUplink Inner Loop Power Control
UTRAN behaviourUTRAN behaviour Serving cells (cells in the active set) estimate SIRest of the received uplink DPCH. Serving cells then generate TPC commands and transmit TPC on every slot according to the fo
llowing rule: if SIRest > SIRtarget , TPC = "0", if SIRest < SIRtarget , TPC = "1".
UE behaviourUE behaviour Upon reception of one or more TPC commands in a slot, UE shall derive a single TPC comman
d, TPC_cmd, for each slot, combining multiple TPC commands if more than one is received in a slot. This is also valid when SSDT transmission is used in the downlink.
Two algorithms supported by UE when deriving a TPC_cmd. Which algorithms to be used is determined by a UE-specific higher-layer parameter, "PowerCo
ntrolAlgorithm", and is under the control of the UTRAN. If "PowerControlAlgorithm" indicates "algorithm1", then the layer 1 parameter PCA shall take th
e value 1 and if "PowerControlAlgorithm" indicates "algorithm2" then PCA shall take the value 2.
47 Internal Use
Uplink Inner Loop Power ControlUplink Inner Loop Power Control
The step size DTPC is a layer 1 parameter which is derived from the UE-specific higher-layer parameter "TPC-StepSize" which is under the control of the UTRAN.
If "TPC-StepSize" has the value "dB1", then the layer 1 parameter DTPC shall take the value 1 dB and if "TPC-StepSize" has the value "dB2", then DTPC shall take the value 2 dB.
The parameter "TPC-StepSize" only applies to Algorithm 1 . For Algorithm 2 DTPC shall always take the value 1 dB.
After deriving of the combined TPC command TPC_cmd using one of the two supported algorithms, UE shall adjust the transmit power of uplink DPCCH with a step of DDPCCH (in dB) which is given by:
DDPCCH = DTPC TPC_cmd.
48 Internal Use
Uplink Inner Loop Power ControlUplink Inner Loop Power Control
Algorithm 1Algorithm 1
UE received 0ne TPC in not soft handover. The value of TPC_cmd is derived as follows:
-- If TPC = 0 ; then TPC_cmd = –1.If TPC = 0 ; then TPC_cmd = –1.
-- If TPC = 1 ; then TPC_cmd = 1 If TPC = 1 ; then TPC_cmd = 1
Algorithm 2Algorithm 2
UE not in soft handover, only one TPC received. In this case, UE shall process re
ceived TPC on a 5-slot cycle.
TPC_cmd value shall be derived as follows:
The first 4 slots of a set, TPC_cmd = 0 . No change in power
The 5th slot of a set, TPC _cmd is derived as follows:
If all TPC are 0; TPC_cmd = -1If all TPC are 0; TPC_cmd = -1 and the transmission will decrease 1dB;
If all TPC are 1; TPC_cmd = 1If all TPC are 1; TPC_cmd = 1 and the transmission will increase 1dB;
Otherwise, TPC_cmd=0Otherwise, TPC_cmd=0.
49 Internal Use
Downlink Inner Loop Power ControlDownlink Inner Loop Power Control
UE behaviourUE behaviour UE generate TPC commands to control the network transmit power and send them in t
he TPC field of the uplink DPCCH. The UE shall check the downlink power control mode (DPC_MODE) before generating
the TPC command:
If DPC_MODE = 0DPC_MODE = 0 : UE sends a unique TPC command in each slot and the TPC command generated is transmitted in the first available TPC field in the uplink DPCCH;
If DPC_MODE = 1DPC_MODE = 1 : UE repeats the same TPC command over 3 slots and the new TPC command is transmitted such that there is a new command at the beginning of the frame.
The DPC_MODEDPC_MODE parameter is a UE specific parameter controlled by the UTRAN.
50 Internal Use
Downlink Inner Loop Power ControlDownlink Inner Loop Power Control
UTRAN behaviourUTRAN behaviour Upon receiving the TPC commands, UTRAN adjust its downlink DPCCH/DPDCH
power accordingly.
For DPC_MODE = 0DPC_MODE = 0, UTRAN estimate the transmitted TPC command TPCest to be 0 or 1, and shall update the power every slot.
If DPC_MODE = 1DPC_MODE = 1, UTRAN estimate the transmitted TPC command TPCest over three slots to be 0 or 1, and shall update the power every three slots.
51 Internal Use
Inner Loop Power Control ParametersInner Loop Power Control Parameters
52 Internal Use
Parameters Optimization ContentsParameters Optimization Contents
Mobile Management Parameters Optimization Power Control Parameters Optimization Power Configuration Parameters Optimization Load Control Parameters Optimization
53 Internal Use
Physical Channels TypePhysical Channels Type
54 Internal Use
Common Channels ParametersCommon Channels Parameters
All channels’ power is reference to PCPICH Power expect PCPICH itself .
55 Internal Use
Dedicated Channels ParametersDedicated Channels Parameters
Dedicated Channel Power is also reference to PCPICH Power.
56 Internal Use
Parameters Optimization ContentsParameters Optimization Contents
Mobile Management Parameters Optimization Power Control Parameters Optimization Power Configuration Parameters Optimization Load Control Parameters Optimization
57 Internal Use
Load Control Parameters OptimizationLoad Control Parameters Optimization
Call Admission Control (CAC)
To control cell’s load by admission/rejection request to ensure a cell’s load under control.
Dynamic Channel Configuration Control (DCCC)
To dynamically change a connection’s load to improve cell resource utilization and control cell’s load.
58 Internal Use
Call Admission Control Procedure Call Admission Control Procedure
call admisson request arrive
Get the service characteristic and the current load
Uplink call admission control evaluation
admitted?
Downlink call admission control evaluation
admitted?
call admitted call rejected
end
n
y
y
n
59 Internal Use
Call Admission Control ParametersCall Admission Control Parameters
60 Internal Use
Dynamic Channel Configuration ControlDynamic Channel Configuration Control
DCCC: Dynamic Channel Configuration Control aim to making full use of radio resource (codes, power, CE )
- Configured bandwidth is fixed when no DCCC- Configured bandwidth is changing when DCCC- Traffic rate
Rate or band
61 Internal Use
DCCC ProcedureDCCC Procedure
Measurement report
DCCC decision
Traffic Volume measurement control
UE and RNC Measurement
DCCC execution
62 Internal Use
Traffic Volume MeasurementTraffic Volume Measurement
Threshold
Transport Channel Traffic Volume
Reporting event 4A
Time
Reporting event 4A
Threshold
Transport Channel Traffic Volume
Reporting event 4B
Time
Reporting event 4B
Reporting event 4B
63 Internal Use
DCCC DecisionDCCC Decision
1) 4a event report -> increase bandwidth 4b event report -> decrease bandwidth
2) If current bandwidth<=DCCC threshold, don’t decrease bandwidth
64 Internal Use
Dynamic Channel Configuration Control Dynamic Channel Configuration Control ParametersParameters
65 Internal Use
Dynamic Channel Configuration Control Dynamic Channel Configuration Control ParametersParameters
66 Internal Use
SummarySummary
Parameter Optimization improves network quality and solves network problems.
Parameter Optimization is a complicated procedure and needs parameter and algorithm knowledge.
Parameter Optimization will be combined with other optimization activities making network better !
Huawei Confidential. All Rights Reserved