neighbour optimization using nastar

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

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23/4/20

NEIGHBOUR CHECK GUIDELINES

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

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Neighbour Cell List There are no certain rules when to add a neighbour, so use common sense.

Instead of adding many neighbours, it might be more beneficial to try to reduce the coverage area of the cell by other methods. While doing so, the need for neighbours will decrease and the interference situation might improve.

As new sites are brought into operation, the neighbour list must reviewed, as new neighbour relations are necessary and old neighbour relations can be removed. When neighbour relations are removed, the consequences should be verified such as statistics need to be monitor etc.

Checking the neighboring list can generated by Genex Nastar. The analysis is simply based on checking the detected “missing neighbour ” or “unused neighbour” events and thus the data collected depend on live Network data (CHR)

If such event has occurred, the analysis usually with help of MapInfo should focus on whether it is necessary and feasible to add or to remove, this neighbour to the neighboring cell list.





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GENEX NASTAR

Genex Nastar Neighbour check

Features

Unnecessary Intra-freq Neighbours analysis

• Per Cell analysis

• RNC analysis (U-Net Report)

One way neighbour define

Missing Inter_RAT Neighbours Analysis (new)

Missing Neighbours analysis





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Choose this query

Select cell

Per CELL ANALYSIS

Choose 1 month period

for better accuracy





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Number of neighbours

defined

Output from Nastar’s Unnecessary Neighbours Query

Number of SHO RL success





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•U-net analysis report is obtain all neighbour relations in the RNC.

•You can obtain the number of neighbours per cell by using the pivot function.

•Neighbour count is important. If 31 neighbours already, must check for unnecessary neighbours

U-net analysis report

Per RNC ANALYSIS





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Example : Delete unused intra freq neighbours

From above result :

May delete 707 (7033AU01) <–> 791 (7000AU03)

May delete 707 (7033AU01) <–> 790 (7000AU02)





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Delete unused intra freq neighbours – double confirm with MapInfo to ensure site to site distance is far

Mapinfo check reveals 4km distance between the 2 sites so,

– delete 707 (7033AU01) <–> 791 (7000AU03)

- delete 707 (7033AU01) <–> 790 (7000AU02)

Include highway and main roads on the mapinfo. If there is a main road or highway between the 2 sites, then this pair should not be deleted.





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One Way Neighbour Defined

Use this report to check for one way neighbours and cells with too few neighbour relations.





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Choose this query

Choose cells and time of data to be analyzed






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Result of Missing intra-frequency neighbours query

•The results above are to be verified with Mapinfo for site to site distance

•If distance too far, could be that site is overshooting -> check with drive test scanner data for confirmation





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Missing Inter_RAT Neighbours Analysis

Choose this query

Choose cells and time of data to be analyzed





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Missing Inter_RAT Neighbours Analysis

Result of Missing IRAT neighbours query

•Need to lookup with the GSM database to obtain the GSM cell

•The results are above are to verified with Mapinfo for site to site distance





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Conclusion

• Neighbour Tuning is necessary to reduce the call drop

• Statistics need to be monitor closely, to ensure no degradation after added and removed neighbour list.

• It is beneficial to check manually the Genex Nastar result since the tool doesn’t provide the distance.

• For the Network still On Going like DiGi, neighbour consistency check is highly recommended to check Biweekly basic.

• Overshooting neighbour is deleterious

Thank You !

www.huawei.com

neighbour optimization using nastar

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