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BSS Optimization
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1 © Nokia Siemens Networks
BSSPAR1: Chapter 1Introduction to Parameter Planning
2 © Nokia Siemens Networks
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3 © Nokia Siemens Networks
At the end of the module, the participant will be able to:
• Sketch a BSS Managed Object Hierarchy
• Look up the parameters at each level, in the parameter dictionary
• Identify parameter value ranges and default settings
• Find the changes to objects and parameters, that occur with each BSS software release
Module Objectives
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Managed Object (MO) Hierarchy
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Example from Parameter Dictionary
Parameter name Rxlev Access Min
Abbreviated name rxLevAccessMin
Managed object BTS
Multiplicity 1
DescriptionWith this parameter you define the minimum power level an MS has to receive before it is allowed to access the cell.
Additional information -
Range and step -110...-47 dBm, step 1 dBm
Formula for getting internal value internal_value = (gui_value + 110)
Default value -105 dBm
Default value notes -
Required on Creation optional
Related functions -
Modification Online
Modified -
Related parameters -
Parameter relationships -
Related options -
Related features -
Interfaces•RACApp <-> RAC•Planner <-> RAC•RAC <-> Optimizer•RAC <-> BSC
References •3GPP Reference: 44.018, 45.008
MML Commands EQG, EQO
MML Abbreviated Name RXP
MML Full Name rxlev access min
Segment Level Parameter true
File Based Provisioning supported true
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PRFILE, FIFILE and PAFILE parameters
• PRFILE (General Parameter File)– Standard features
– Optional features
– Interrogate with MML command ZWOS
• FIFILE (Feature Information Control File)– Stores optional parameters from the PRFILE
– Interrogate with MML command ZWOI
• PAFILE (BSC Control Parameter File)– GSM-BSC parameters
– GSM Timers
– Interrogate with MML command ZEGO
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Features & Activation status
ZWOS command
ZWOI command
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GSM-BSC Parameters & Timers
ZEGO command
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Viewing parameters Using NetAct CM Editor
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Viewing parameterswith MML Commands in BSC
ZEQO Output
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Exporting parametersUsing NetAct CM Ops Manager
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New objects & parameters
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Call Phases (MOC case)
MS BTS BSC
AUTHENTICATION (SDCCH)Phase 2 : MM signalling
CIPHERING MODE (SDCCH)Phase 8 : Ciphering
TMSI REALLOCATION (SDCCH)
SETUP (SDCCH)
Phase 2 : MM signalling
CH. REQUEST (RACH)
IMMEDIATE ASSIGN(AGCH)
SERVICE REQUEST (SDCCH)
Phase 1 : Paging, initial MS
CH.RELEASEPhase 4 : Release
ALERTING & CONNECT (FACCH)
Phase 2 : MM signalling
CONN. ACK. and MEASUREMENTPhase 15 : Conversation
DISCONNECT & RELEASE (FACCH)
Phase 4 : Release
ASSIGNMENT (SDCCH-FACCH)Phase 3 : Basic assignment
• Signalling procedures are used during the 15 phases in a basic call
• Certain parameters influence the setting up and the release of a call