HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Neighbour cell and Scrambling planningIntroduction to CNA and SCP
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After this course , you will : Know how to use the CNA tool;
Know how to use the SCP tool.
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Chapter 1 Neighbour cell planning
Chapter 2 Scrambling planning
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Neighbour cell planning
Tool:
-CNA ( Cell Neighbour Allocation)
Data Preparation:
We need to prepare the following data as the template under the folder \Input:
A : Template of Cell Engineer parameter : cellinfo _ template .xls
B : Propagation Model file : propagation _ model .txt
C: Antenna direction plot file : DEFAULT ,under the folder of AntennaPattern.
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Neighbour cell planning
Data explanation:
A : First cell data is made in cellinfo _template.xls , then save as txt file :cellinfo .txt 。
fig1 : Input information of cell data
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Neighbour cell planning Data explanation:
B : SPM propagation model parameter is defined in Propagation_model.txt.
fig2 : Input information of propagation model
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Neighbour cell planning Data explanation:
C : Antenna information
fig3 : Antenna information
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Neighbour cell planning Check configuration file :CAN _ config .txt (file name can’t be
changed ) :
Modify the parameters and input/output file name according to
different scenario:
a : parameter configuration :
1 、 Calculated _bin _size [ m ] =:20
2 、 Calculated _SHO _threshold [ dB ] =:6
3 、 MaxIntraFreqNBCellsbyCPL=:15 value range [ 1 , 31 ]。
4 、 MaxIntraFreqNBCellsbyDistance=:15 value range [ 0 , 31 ]。
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Neighbour cell planning Check configuration file :CAN _ config .txt (file name can’t be
changed ) :
b : file setting :
1 、 Cellinfo _file=:.\input\cellinfo .txt 。
2 、 Cellneighbour _file=:.\output\cellneighbour.txt
3 、 Coor _ trans_file=:.\output\ GaussianPlanarRectCoor .txt.
4 、 Antenna _ pattern _Dir=:.\input\ antennapattern.
5 、 Propagation _model _file=:.\input\Propagation_model.txt.
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Neighbour cell planning Check configuration file :CAN _config .txt (file name can’t be
changed ) :
b : file setting :
6 、 Path _loss _file _Dir=.\Output\PL
7 、 SHO _Array _file=.\Output\ SHO _Array .txt
8 、 Cell _NB _by _CPL _file=.\Output\ Cell _NB _by _CPL .txt
9 、 CAN _statis _file=.\Output\ CAN _statis .txt
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Neighbour cell planning Check configuration file :CAN _config .txt (file name can’t be
changed ) :
b : file setting :
fig4 : configuration file information
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Neighbour cell planning After data preparation, execute CAN .exe , begin to Neighbour
cell planning。
fig5 : execute result
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Neighbour cell planning We can get the neighbour cell in the output folder.
fig6 : CNA_statis
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Chapter 1 Neighbour cell planning
Chapter 2 Scrambling planning
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Scrambling planning
Scrambling resources analysis:
The object of Scrambling planning is 512 downlink main
scrambling
Scrambling planning tool:
-SCP ( Scrambling Code Planning)
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Scrambling planning
Scrambling steps:
Parameters setting : define the main configuration in
file SCP _config.txt,such as minimum reuse
distance,total useful scramblings and so on;
Data configuration : according to user manual,make file
cellinfo.txt and neighbour cell file:cellneighbor.txt ;
Planning adjust : execute , analysis planning result
and adjust;
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Scrambling planning
Scrambling planning steps:Parameter setting :
Setting the following parameters in file SCP_config.txt.
[1]Nmax=: 5
[2]Distance_threshold[Km]=: -1
[3]Min_PSC_code=: 0
[4]Max_PSC_code=: 511
[5]Reserved_PSCs_per_group=: -1
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Scrambling planning
Scrambling planning steps: Data preparation : Engineer parameters file and neighbour cell relationship file are
as following :
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Scrambling planning Scrambling planning steps: Data preparation :
fig6 : cell information
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Scrambling planning
Scrambling planning steps:
Data preparation :
Fig7:neighbour cell table
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Scrambling planning
Scrambling planning steps :
Execute:
fig8 : execute result
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Scrambling planning
Scrambling planning steps :
Planning adjust :
The purpose of planning and adjust are :A)The scrambling allocation to all cells succeed;B)The scrambling allocated as fewer as possible,and the minimum reuse distance is as large as possible.
We can adjust by modifying the parametes , such as :A)allow/forbidden allocation scrambling set;B)Reuse distance;C)Neighbour relationship
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