Post on 03-Jun-2018
transcript
8/11/2019 2g to 3g Handover Mop (2)
1/12
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):
8/11/2019 2g to 3g Handover Mop (2)
2/12
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 :
8/11/2019 2g to 3g Handover Mop (2)
3/12
As a final step, Adjacency needs to be created between source-2G cell
& target 3g cell as shown below :
8/11/2019 2g to 3g Handover Mop (2)
4/12
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
8/11/2019 2g to 3g Handover Mop (2)
5/12
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
Modifiable OMC Changes: -- RNO Changes: --
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
:
8/11/2019 2g to 3g Handover Mop (2)
6/12
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
Unit Minimum Maximum DefaultValue
dB -24.5 0 -15
Modifiable OMC Changes: -- RNO Changes: --
Parameter Access --
External Comment --
Cell TypeDependent
No
Nb of TRXDependent
No
8/11/2019 2g to 3g Handover Mop (2)
7/12
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
Unit Minimum Maximum DefaultValue
None 0 3 2
Modifiable OMC Changes: -- RNO Changes: --
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
8/11/2019 2g to 3g Handover Mop (2)
8/12
(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
Unit Minimum Maximum DefaultValue
None 0 1 0
Modifiable OMC Changes: -- RNO Changes: --ParameterAccess
--
External
Comment--
Cell TypeDependent
No
Nb of TRXDependent
8/11/2019 2g to 3g Handover Mop (2)
9/12
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
Unit Minimum Maximum DefaultValue
% 0 100 0Modifiable OMC Changes: -- RNO Changes: --
ParameterAccess
--
ExternalComment
Value 0 disables the feature.
Cell TypeDependent
No
Nb of TRXDependent
No
8/11/2019 2g to 3g Handover Mop (2)
10/12
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
Unit Minimum Maximum DefaultValue
% 1 100 100
Modifiable OMC Changes: -- RNO Changes: --
ParameterAccess
--
External
Comment
--
Cell TypeDependent
No
Nb of TRXDependent
No
8/11/2019 2g to 3g Handover Mop (2)
11/12
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
Unit Minimum Maximum DefaultValue
% 0 100 100
Modifiable OMC Changes: -- RNO Changes: --
ParameterAccess
--
ExternalComment
--
Cell TypeDependent
No
Nb of TRXDependent
No
8/11/2019 2g to 3g Handover Mop (2)
12/12
An Example of successful 2g-3g CS handover: