2g to 3g handover mop (2)

8/11/2019 2g to 3g Handover Mop (2)

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Subject MOP for 2G-3G

HO parameters

Date: Nov 17, 2010

Project BSNL From: Naveen Gupta

Sachin Rawat

2G TO 3G CS HANDOVER STANDARD PARAMETERS

is2GTo3GCSHandoverAllowedWithinRnc: This parameter indicates whether the 2G To 3G CS

Handover is allowed within the RNC Need to be set as TRUE in RNC. .(

RNC\RADIOACESSSERVICE).

FOLLOWING PARAMETERS NEED TO BE DEFINED AT SOURCE CELL (2G END):


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Target 3G cell needs to be defined as a External cell at 2G

end.Scrambling Code, LAC,LocalCellID, CellID,RNCID of target 3G cellneed to be defined as shown below :


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As a final step, Adjacency needs to be created between source-2G cell

& target 3g cell as shown below :


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Description of parameters

EN_3G_HO) - (EN_3G_HO)

HMI Name EN_3G_HOParameter Name

Logical Name EN_3G_HO

Definition This flag enables/disables the 2G-3G handover

Coding rules 0: disabled, 1: enabled

Mandatory rules 1) For Non Evolium serving cell:The cell neighborhood for handover is controlled by EN_3G_HOand FDD_ARFCN values.- since the neighborhood of the serving cell for handover is 2Gonly, then there can be up to 32 different

Recommendedrules

--

Category Site (CAE)

Type Flag

SubSystem BSC

Instance cell

Unit Minimum Maximum DefaultValue

None 0 1 0

Modifiable OMC Changes: -- RNO Changes: --

ParameterAccess

--

ExternalComment

2G-3G Handover will be disabled by the BSS in cells mapped tonon Evolium BTSs

Cell TypeDependent

No

Nb of TRXDependent

No


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A_ECNO_HO) - (A_ECNO_HO)

HMI Name A_ECNO_HOParameter Name

Logical Name A_ECNO_HO

Definition Window size for Ec/No level averages for 2G to 3G handover

Coding rules --

Mandatory rules --

Recommended rules --

Category Site (CAE)

Type Number

SubSystem BSC

Instance cellUnit Minimum Maximum DefaultValue

Samfr 1 31 8


Parameter Access --

External Comment --

Single 8

Umbrella 8

Concentric 8

Concentric Umbrella 8Microcell 4

Minicell 8

Extended inner cell 8

Cell Type Dependent

Extended outer cell 8

Nb of TRX DependentNo

:


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THR_ECNO_HO) - (THR_ECNO_HO)

HMI Name THR_ECNO_HOParameter Name

Logical Name THR_ECNO_HO

Definition Ec/No threshold above which a handover to UTRAN may betriggered

Coding rules step size = 0.5 dB, coded over 6 bits0: "HO to 3G attempted whatever the Ec/No",1: -24.0,2: -23.5,

3: -23,...,48: -0.5,49: 0.0

Mandatory rules --

Recommendedrules

--

Category Site (CAE)

Type Threshold

SubSystem BSC

Instance cell


dB -24.5 0 -15


Parameter Access --

External Comment --

Cell TypeDependent

No

Nb of TRXDependent

No


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FDD_MULTIRAT_REPORTING) -(FDD_MULTIRAT_REPORTING)

HMI Name FDD_MULTIRAT_REPORTINGParameterName Logical Name FDD_MULTIRAT_REPORTING

Definition Number of the strongest 3G cells to be reported by the MS in themeasurement report message

Coding rules --

Mandatory rules--

Recommendedrules

--

Category Site (CAE)Type Number

SubSystem BSC

Instance cell


None 0 3 2


ParameterAccess

--

ExternalComment

This parameter is broadcast on BCCH and on PBCCH if there is aPBCCH allocated in the serving cell.This parameter is meaningful only if EN_3G_HO is set to enabled.If disabled, this parameter is considered as equal to zero (the MSshall report only 2G cells).This parameter is also broadcast on SACCH.

Cell TypeDependent

No

Nb of TRXDependent

No


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(EN_2G_3G_HO_NO_SERVICE_HO) -

(EN_2G_3G_HO_NO_SERVICE_HO)

HMI Name EN_2G_3G_HO_NO_SERVICE_HOParameterName Logical Name EN_2G_3G_HO_NO_SERVICE_HO

Definition Allows handovers towards 3G cells for a given MS when I.E.Service Handover is missing and the load in the serving cell is high(see THR_CELL_LOAD_3G_REQ

Coding rules 0 : disable, 1 : enable

Mandatory

rules

--

Recommendedrules

--

Category Site (CAE)

Type Flag

SubSystem BSC

Instance cell


None 0 1 0

Modifiable OMC Changes: -- RNO Changes: --ParameterAccess

--

External

Comment--

Cell TypeDependent

No

Nb of TRXDependent


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THR_CELL_LOAD_3G_REQ) -(THR_CELL_LOAD_3G_REQ)

HMI Name THR_CELL_LOAD_3G_REQParameterName Logical Name THR_CELL_LOAD_3G_REQ

Definition Load threshold on the serving cell below which handovers towards3G cells are forbidden when I.E. Service Handover is missing(whatever EN_2G_3G_HO_NO_SERVICE_HO value)

Coding rules Step size = 1

Mandatoryrules --

Recommendedrules

--

Category Site (CAE)

Type Threshold

SubSystem BSC

Instance cell


% 0 100 0Modifiable OMC Changes: -- RNO Changes: --

ParameterAccess

--

ExternalComment

Value 0 disables the feature.

Cell TypeDependent

No

Nb of TRXDependent

No


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Cell Capacity Class) - (CELL_CAPACITY_CLASS)

HMI Name Cell Capacity ClassParameterName Logical Name CELL_CAPACITY_CLASS

Definition Capacity class of the cell, measured on a linear scale, ranging from1 to 100.

Coding rules binary value on 8 bits

Mandatoryrules

--

Recommendedrules

the Cell Capacity Class shall follow the recommended rule: "Inorder to fulfill the 3GPP requirement of having a linear scale in thecapacity class, ranging from 1 to 100:Cell Capacity Class is a linear function of the Cell capacity: value 1shall indicate the minimum capacity class, and 100 shall indicatethe maximum capacity class. Capacity class should be measuredon a linear scale.

The default value of Cell Capacity Class should depend on thenumber of available TCHs in the cell and since there may be up to126 TCH channels in one GSM cell:

Cell_Capacity_Class = int{[(99/125) x (NTCH - 1)] + 1}

where NTCH is the number of all TCH channels in the Cell."

Category Site (CAE)

Type NumberSubSystem BSC

Instance cell


% 1 100 100


ParameterAccess

--

External

Comment

--

Cell TypeDependent

No

Nb of TRXDependent

No


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THR_CELL_LOAD_3G_REJECT) -(THR_CELL_LOAD_3G_REJECT)

HMI Name THR_CELL_LOAD_3G_REJECTParameter

Name Logical Name THR_CELL_LOAD_3G_REJECTDefinition Load threshold determining whether a 3G to 2G handover request

shall be rejected in load situation; the feature is deactivated bysetting THR_CELL_LOAD_3G_REJECT to its maximum value 100%.

Coding rules binary value on 8 bits

Mandatoryrules

THR_CELL_LOAD_3G_REJECT shall be lower than the 2G loadthresholds HIGH_TRAFFIC_LOAD or equal to 100%.

Recommendedrules

--

Category Site (CAE)

Type Number

SubSystem BSC

Instance cell


% 0 100 100


ParameterAccess

--

ExternalComment

--

Cell TypeDependent

No

Nb of TRXDependent

No


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An Example of successful 2g-3g CS handover:

2g to 3g handover mop (2)

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