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NetAct Optimizer 2.2 CD2 for GSM
GSM Measurements for Optimizer
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STU CHU CMSTU CHU CM
STU CHU CM
WDU
CTU
WDU
OMU OMU
M M
CCMU CCMUCLS
PDE
DX200
BSC PM database
MMRevery 480ms
Raw data
Interference matrix
AutomaticOptimisation
AutomaticOptimisation Configuration
data
Algorithm parameters
User input
Measuring
New Plan
Radio Access
Configurator
Optimizer
Data Flow Example
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At the end of this module the trainee should be able to:
Describe the measurements needed for Optimizer
Outline the measurement setup and collection process
Module Objectives
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Mobile Measurements
The measurements needed in Optimizer
How to manage BCCH Allocation List (BAL) changes?
• CIP and ARP measurements if equal or less than 32 BCCH frequencies to be measured
• CIP and ARP measurements if more than 32 BCCH frequencies to be measured
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The usage of mobile measurements in Optimizer
Mobile measurements are used in Optimizer
• to generate Interference Matrix• to generate timing advance histogram
Interference matrix is used for
- automatic frequency optimisation
- automatic adjacency optimisation
Interference matrices are stored in Optimizer database and not automatically cleaned.
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Mobile Measurements in GSM
• Defined Adjacent Cell (DAC) measurement collects data from cells defined as adjacent cells• Channel Finder (CF) measurement collects data from non-adjacent cells
• Traffic measurements are typically active by default• The cells that use the same BCCH channel as the serving cell cannot be measured and are defined as Blind Spots
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Mobile Measurement Report example
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Mobile measurements
BSC
Def adj cell measurements
Channel finder measurements
P_NBSC_CHANNEL_FINDER
P_NBSC_DEF_ADJ_CELL
PM DB
MMR
OPTDB_CIP
OPTDB_ARP
OPT DB
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Measurement Time
Minimum measurement period depends on the traffic but should be at least 2-3 days
• Less traffic => longer measurement periodMore measurement rounds means longer measurement time
During the measurements and optimisation there must beNO CHANGES to the NW
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Preparations
During the measurements the BCCH Allocation Lists (BALs) need to contain every BCCH frequency in the network
Maximum length (theoretical) of the BA list is 32
Common BCCH and WCDMA neighbors will reduce the theoretical maximum BAL length by one each (down to 30)
If there are more than 32 (or 31, or 30) BCCH frequencies in the network the measurements need to be run in several cycles of equal length but with different BA lists
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How to measure all BCCHs
If the network has less than 32 BCCHs : create a double BALIf the network has more than 32 BCCHs : rotate the BAL lists
10 20 30
25 neighbour cell BCCH frequencies+ serving cell frequency
(max) 6 free places
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How to get the measurements
BAL rotation tool for CIP, ARP
MBAL for FEP
Double BAL for CIP, ARP
MBAL for FEP
BSC S11 CD10 or newer
BAL rotation toolDouble BALBSC older than S11 CD10
More than 32 BCCH frequencies
Less than 32 BCCH frequencies
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Mobile Measurements
The measurements needed in Optimizer
How to manage BCCH Allocation List (BAL) changes?
• CIP and ARP measurements if equal or less than 32 BCCH frequencies to be measured
• CIP and ARP measurements if more than 32 BCCH frequencies to be measured
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CIP and ARP measurements in short
Optimizer – Tools – Network Statistics – Manage Interference Matrices
•Retrieve the measurements from PM DB
Using “Prepare GSM IM Creation”wizard
Start the measurements Channel Finder and Defined Adjacent Cell
ZWOA:2, 626,A;Activate the measurement Defined Adjacent Cell
ZWOC,10,65,00FF;Activate the measurement Channel Finder
This feature is by default active Activate the feature “Double BCCH Allocation List” in the BSC
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Select BSCs from the Navigator
Preparing Nokia GSM IM Creation for CIP and ARP (1/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (2/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (3/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (4/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (5/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (6/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (7/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (8/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (9/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (10/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (11/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (12/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (13/14)
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Preparing Nokia GSM IM Creation for CIP and ARP (14/14)
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Mobile Measurements
The measurements needed in Optimizer
How to manage BCCH Allocation List (BAL) changes?
• CIP and ARP measurements if equal or less than 32 BCCH frequencies to be measured
• CIP and ARP measurements if more than 32 BCCH frequencies to be measured
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CIP and ARP measurements in short
Optimizer – Tools – Network Statistics – Manage Interference Matrices
•Retrieve the measurements from PM DB
Using “Prepare GSM IM Creation”wizard
Start the measurements Channel Finder and Defined Adjacent Cell
ZWOA:2, 626,A;Activate the measurement Defined Adjacent Cell
ZWOC,10,65,00FF;Activate the measurement Channel Finder
ZEQActivate the feature “Double BCCH Allocation List” in the BSC
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Using BAL Rotation (1/18)
Select BSCs from the Navigator
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Using BAL Rotation (2/18)
More than 32 BCCH frequencies to be measured
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Using BAL Rotation (3/18)
More than 32 BCCH frequencies to be measured
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Using BAL Rotation (4/18)
To measure more than 32 frequencies using CF and DAC measurements BAL Rotation tool is needed
First you must remove old BAL objects if any exist.
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Using BAL Rotation (5/18)
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Using BAL Rotation (6/18)
Start the BAL Rotation tool to begin creating BALs
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Using BAL Rotation (7/18)
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Using BAL Rotation (8/18)
Settings are user specific
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Using BAL Rotation (9/18)
Settings are user specific
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Using BAL Rotation (10/18)
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Using BAL Rotation (11/18)
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Using BAL Rotation (12/18)
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Using BAL Rotation (13/18)
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Using BAL Rotation (14/18)
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Using BAL Rotation (15/18)
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Using BAL Rotation (16/18)
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Using BAL Rotation (17/18)
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Using BAL Rotation (18/18)
Using CM Operations Manager provision the backup plan that was created previously (in order to bring back the original configuration in the network).
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Exercise 1 (CIP, ARP)
1. Check how many BCCHs are used in your optimization scope2. Check the version (= release) of the BSCs in your optimization scope3. Check if the needed features in the BSCs are activated4. Use Optimizer wizard Prepare Nokia GSM IM Creation to set up and start the
measurements5. In Optimizer, Retrieve the Interference matrix for your scope