Neighbour Optimization Using Nastar

Security Level:

2013/9/2

NEIGHBOUR CHECK GUIDELINES www.huawei.com

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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. HUAWEI TECHNOLOGIES CO., LTD.

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GENEX NASTAR

Unnecessary Intra-freq Neighbours analysis • Per Cell analysis • RNC analysis (U-Net Report) Genex Nastar Neighbour check Features

One way neighbour define Missing Neighbours analysis

Missing Inter_RAT Neighbours Analysis (new)

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Unnecessary Intra-freq Neighbours analysis

Per CELL ANALYSIS

Select cell

Choose this query

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Choose 1 month period for better accuracy Huawei Confidential

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Unnecessary Intra-freq Neighbours analysis Output from Nastar’s Unnecessary Neighbours Query

Number of SHO RL success Number of neighbours defined HUAWEI TECHNOLOGIES CO., LTD.

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Unnecessary Intra-freq Neighbours analysis

Per RNC ANALYSIS

U-net analysis report

•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

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Unnecessary Intra-freq Neighbours analysis Example : Delete unused intra freq neighbours

From above result : May delete 707 (7033AU01) 791 (7000AU03)

May delete 707 (7033AU01) 790 (7000AU02) HUAWEI TECHNOLOGIES CO., LTD.

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Unnecessary Intra-freq Neighbours analysis 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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Missing Neighbours analysis

Choose cells and time of data to be analyzed

Choose this query HUAWEI TECHNOLOGIES CO., LTD.

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Missing Neighbours analysis 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 cells and time of data to be analyzed

Choose this query

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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

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Thank You ! www.huawei.com