drive test kpi

Drive test KPI's

Drive test KPI'sHi all

Please could you provide your input to the following drive test KPI's that will be measured during initial tuning.

The network will be using P6 and there will be in total 20 sites. Some areas will have only 1/2 sites providing coverage.

There will be 10 codes available per sector and IP will be used for transmission.

Recommended Key Performance IndicatorTargetTestCall Setup Success Rate Speech (CSSR Speech)98%Drop Call Rate Speech (DCR Speech)2%Call Setup Time Speech (CST Speech)5sCall Setup Success Rate CS64 (CSSR CS64)98%Drop Call Rate CS64 (DCR CS64)2.50%Call Setup Time CS64 (CST CS64)8sCall Setup Success Rate PS R99 (CSSR PS R99)98%Drop Call Rate PS R99 (DCR PS R99)2%PS Interactive R99 User Throughput (User Throughput R99)240kbps10Mb file DLCall Setup Success Rate PS HSDPA (CSSR PS HSDPA)98%Drop Call Rate PS HSDPA (DCR PS HSDPA)2%PS Interactive HSDPA User Throughput (User Throughput HSDPA)2500kbps50Mb file DLPS Interactive EUL User Throughput (User Throughput EUL)600kbps20Mb file ULIRAT Handover Success Rate Speech (IRAT Speech)97%

I appreciate your feedback.

Regards

Ciara

Posted: 2008-11-01 01:22 by Alvin Ng

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Hi,

I think most of the KPIs that you have provided are quite allright for a trial and is quite similar to the ones i had proposed previously to another operator. Probably, just something to highlight the CST where it is very dependent on severalfactors likethe Core and whether is that A-B party or just to the call test number thena 5 sec for speech CST maybe a little low.

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Posted: 2008-11-03 11:48 by Carlos Manosalva



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Hi Ciara..

I think a few things you need to clarify:

Have Ericssson comminted to those KPI?

If Yes, have Ericsson and the operator agreeded on how to measure and where to measure?

The golden route is to recommend. Where you defind a 30 min and drive around until you collect a reelevant number of samples.

Normally samples below a certain level of RSCP or EcNo supposed to be excluded. Becasue you actually are doing acceptance of the system and not of the design.

All those details should have normally be agred in advance if not you should try to "take advantage of if"

All the 3G serviced TC should be performed an 3G only mode.

As you those are mygeneral recomendations, andhow to approach is quite dependant onhow the aggrement is done with the custommer... The PM should be aware of those detailes.

BR

Carlos


Posted: 2008-11-03 11:16 by Marco Guagliardi



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Hi Ciara

Ihave involved on FOA P6FP for an italian customer. we have tested P6 on live network. We have monitored 10 KPIs. In the next table you can find the P5 reference values and the P6 values.

KPIP5 Reference ValueP6.1 Values (00:00 23:45)AccessibilityKPI 1 - RRC Est. FR2.751.84KPI 2 - CS RAB Est. FR0.260.31KPI 3 - PS RAB Est. FR1.401.16KPI 4 - HS RAB Est. FR1.152.63RetainabilityKPI 5 - Speech DR0.900.93KPI 6 - Videocall DR1.881.70KPI 10 - PS DR7.165.87HS ThroughputKPI 9 - HSDPA User Thput471.42484.49AvailabilityKPI 7 - Cell Av. Auto99.0399.94KPI 8 - HS Av. Auto99.0799.95


Posted: 2008-11-04 04:58 by Yew Yuen Lum



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Hi Ciara,

1. For your Speech CS12.2kbps, since there is no particular requirement on MOC (Mobile Originating Call) & MTC (Mobile Terminating Call), and there is requirement of 5s, I would suggest you need to call a fixed line.

2. You may need to look into no. of calls or sample in your drive test data as well. For example, if DCR is 2%, means in you only have 100 calls, you can only drop 2 calls. So if you have less sample, you can only afford drop less calls.

3. Regarding your IRAT, you can optimise your criteria accordingly to match the IRAT boundary level and noise floor level. Do not set too low as it will cause high failure; do not see too high else it will be too obvious less effort is done in optimising the network.

4. For CS64 call setup time, it is advisable to put the MTC UE at stationary spots with good coverage to minimise the risk.

5. For all the IP test, it's advisable for to test there is no Transmission bottleneck as well as 100% Transmission Availability. I assume Single Site Verification Test have been carried out on each sites, since it's only 20 sites.

6. Look at the parameters as well, as there are many useful features to help you get high throughput, e.g. flexible-code etc

Good Luck.

BR//Lum


Posted: 2008-11-04 15:09 by Nike Olabiyi



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Hi Ciara,

here are the KPIs we used in Nigeria for one of the operators:

CLASSESINDICATORSThresholdCoverageCPICH RSCP > -95 and CPICH Ec/No > -11> 95%Pilot Pollution< 4%AccessSpeech Call Set up Time< 5sCall Set up Success rate (CSSR) (Speech)> 97%Call Set up Success rate (CSSR) (Packet)> 97%Call Set up Success rate (CSSR) (Video)> 97%ThroughputPS 64 RAB> 48PS 128 RAB> 96PS 384 RAB> 300HSDPA> 2.25MMobilitySoft / Softer Handover Factor overhead< 30%Soft Handover Success Rate (Speech)> 97%Soft Handover Success Rate (Packet)> 97%Soft Handover Success Rate (Video)> 97%CS IRAT Handover Success Rate(3G to 2G)> 97%PS IRAT Handover Success Rate(3G to 2G)> 95%RetainabilityDCR (Speech)< 3%DCR (Packet)< 10%DCR (Video)< 3.5%

It look very similar to yours.

BR,

Nike


Posted: 2008-11-10 08:57 by Mohd Afiq Ismail



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Hi Ciara,

Judging from your Initial Tuning KPI, it does not differ much from what we do here in Maxis Malaysia. I believe you can achieve this KPI easily.From my experience, FA is much more difficult than Initial Tuning. Good luck.

BR,-afiq-

Posted: 2008-11-11 20:32 by Ciara Mulligan



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Hi

I would like to share some other useful information about this topic which I received through mails from the N&TC Global Technical Focused Network.The following website contains really good guidelines and a database for handling KPI commitments within projects:http://internal.ericsson.com/page/hub_globalservices/unit/units/advise/kpi/kpi_guidelines.jsp

Some otherquestions that should beconsidered when dicsussing KPI's are:- Are theKPI's based ona "golden cluster"?- Are you driving with exclusion criteria so only where you have good coverage will you drive?- How many samples will you need toverify any of these KPI's?You should be aware of thefact that you might not be able to get enough samples for the KPI fulfillment since you have a very small cluster. - Are all to be met in the one cluster, or per cell?- Is the cluster empty or any other traffic?- Is there any payment terms related to this?Normally you should counter propose something to the customer that is good enough (few KPIs, few drives) so that you can pass acceptance in a short time period - and spend the rest of your time improving the network for you customer, not re-measuring kPIs day in and day out.

The KPIs themselves are not impossible under the right conditions and criteria but under the wrong ones they must be rejected.

Rgds

Ciara

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