1 Neighbour Cell and Scrambling Planning

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

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Neighbour cell and Scrambling planningIntroduction to CNA and SCP

HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential

After this course ， you will ： Know how to use the CNA tool;

Know how to use the SCP tool.


Chapter 1 　 Neighbour cell planning

Chapter 2 　 Scrambling planning


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.


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


Neighbour cell planning Data explanation:

B ： SPM propagation model parameter is defined in Propagation_model.txt.

fig2 ： Input information of propagation model


Neighbour cell planning Data explanation:

C ： Antenna information

fig3 ： Antenna information


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 ］。


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.


Neighbour cell planning Check configuration file :CAN _config .txt (file name can’t be

changed ） :


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


Neighbour cell planning Check configuration file :CAN _config .txt (file name can’t be

changed ） :


fig4 ： configuration file information


Neighbour cell planning After data preparation, execute CAN .exe ， begin to Neighbour

cell planning。

fig5 ： execute result


Neighbour cell planning We can get the neighbour cell in the output folder.

fig6 ： CNA_statis


Chapter 1 　 Neighbour cell planning

Chapter 2 　 Scrambling planning


Scrambling planning

Scrambling resources analysis:

The object of Scrambling planning is 512 downlink main

scrambling

Scrambling planning tool:

-SCP （ Scrambling Code Planning)


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;


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


Scrambling planning

Scrambling planning steps： Data preparation ： Engineer parameters file and neighbour cell relationship file are

as following ：


Scrambling planning Scrambling planning steps： Data preparation ：

fig6 ： cell information


Scrambling planning

Scrambling planning steps:

Data preparation ：

Fig7:neighbour cell table


Scrambling planning

Scrambling planning steps :

Execute:

fig8 ： execute result


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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1 Neighbour Cell and Scrambling Planning

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