HUSPA Introduction Methodology KTS UA5%2E0

2

HSUPA Introduction Methodology

Aaron PartoucheContributors: Karima El Massaoudi, Majid Mneymneh; Hassan El Nahas & Aaron PartoucheUA5.0 HSxPA Engineering Knowledge Transfer SessionThe 13th of December 2006

3

Introduction

• 2 operational methodologies are proposed by Core WNE to introduce either HSDPA or HSUPA in an entire or a part of the network:• Before the deployment of both HSDPA & HSUPA in an area without

HSDPA, HSDPA Introduction Methodology and HSUPA Introduction Methodology have to be performed

• Before the deployment of HSUPA in an area with HSDPA, only HSUPA Introduction Methodology is mandatory. In this case, special care on monitoring of HSDPA Performance to determine areas that needs to be upgraded.

• These methodologies aim at checking if the radio quality and the capacity are acceptable to reach given HSDPA or HSUPA Performance targets and to not degrade current traffic

• The results of these methodologies are important outputs in order to select the most appropriate topology deployment

• Operators will activate HSUPA wherever HSDPA is activated, therefore this document will focus only on HSUPA Introduction Methodology

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HSUPA Introduction Methodology Overview

•The HSUPA Introduction Methodology is consisted on 2 parts:• Impact assessment of the HSUPA traffic on the current UTRAN Hardware Capacity

system:• BTS Hardware: addition of at least one e-BBU• Transport: no impact forecasted since Iub/ Iu/ Iur Backbone already dimensioned for HSDPA

in DL• Downlink Power: No power control on E-DCH DL common channels, the DL capacity impact

should be limited but it is essential to measure it in case of too high DL Power used by these channels impacting eventually HSDPA Performance

• Impact of HSUPA traffic on Radio Quality is based on UL Load Management:

• UL RSSI variation has to be estimated before introduction of HSUPA to assess the Performance of HSUPA and to detect potential optimization issue that could degrade current traffic

RTWPRTWPref

UL 1

HSUPA Introduction Methodology focuses in priority on UL RSSI stability assessment & optimization requirements associated and then secondly on

DL Power Capacity assessment

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Agenda

• UL Load Management & MAC-e scheduler Overview

• UL RSSI Report done by UIIV

• Audit of UL RSSI stability based on Counters & OTCell

• UL RSSI Field Examples

• Neighboring Analysis Methodology Overview

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UL Load Management Overview

•The Cell UL Load is calculated as follow:

• with Rise over Thermal: RoT=RTWPcur(dBm)-RTWPref(dBm)•RTWPref is calculated by the CALLP CCM as follow:

• Take the 20 lowest RTWP values received every 2 seconds during 24 hours if no connection in the considered cell and in the other cells managed in the Node B on the same frequency

• Mean value of the 20 lowest RTWP values considered and compare it with the previous value:

• If RTWPref(Period n)-RTWPref(Period n-1) >0.5dB:• then RTWPref “Self learned” = RTWP (Period n-1) + 0.5*(RTWPref(Period n)-RTWPref(Period n-1)) • else RTWPref “Self learned” = RTWP (Period n)

•When RTWP increase reaches 3dB (RoT=3dB), then UL Load=0,5

UL RSSI is a fundamental indicator for UL load estimation

)10/)((101 dBRoTULLoad

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MAC-e scheduler Overview

• MAC-e schedules the E-DCH users of the cell by providing absolute grants (via E-AGCH channel)

• Each UE adapt its HSUPA throughput according to grants received• MAC-e scheduler considers the self-learned RTWPref and the RTWP

max sent by the RNC (RTWPmax=totalRoTmax datafilled (currently setting is 6dB)+RTWPreference (currently setting is -106,1dBm))

• The main target of the scheduler is to grant UE’s so that total UL Load stays near the target load (totalRoTMax), but not above

• In case of radio “overload” (i.e. RoT is above totalRoTMax+ rtwpMargin during a rtwpTimeDetection), the grants of E-DCH users get down to 0

MAC-e scheduler estimates UL free capacity to maximize traffic scheduled in HSUPA. If RSSI is too high, HSUPA throughput will be poor

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Contributors of UL RSSI spikes identified by UIIV

• UIIV’s report addresses an issue discovered by R&D in iFUN during HSUPA preliminary studies, that appeared to be also present in various customer networks :• UL RSSI suffers from abnormal spikes and excessive levels than can last

between seconds to minutes.• Current networks still not reached their UL load limit. UL Load was not yet the

focus, although this high RSSI issue should explain a part of remaining call drops in impacted areas of networks.

• According to UIIV, contributors to RSSI spikes and high levels can be classified in three categories.• Network parameters

• Missing cell declaration in neighboring• RACH open loop parameter consistent but without security bounding

• Software issue in BTS and UE• 2 physical layer issues discovered in NodeB• 2 issues discovered in tested UE

• Hardware cabling issue• TRM RX cable swap between sector in base station

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Issue list and contribution to RSSI degradation ½According to UIIV’s report

Ranked Cause

Detail Impact Side Status Solution

Missing neighbor cell declaration

Missing declaration in OMC.

! Critical ! OAM To be fixed in live networks

New scan of neighborhood in impacted areas.

30ms NodeB blindness when setting up new leg.

30dB RSSI spike is generated during 30ms.

High occurrence. Major BTS Fix in progress

Correction initially forecast

with MNCL load 6 in V4.2

Spurious RL RESTORE atestablishment

Very low occurrence Major BTS Fixed

Corrected with MNCL load 5 in V4.2

UA4.2.5 is not currently deployed

UIIV is expecting that operation teams identify missing neighbor cells & update the neighbor datafilled cells

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Issue list and contribution to RSSI degradation 2/2According to UIIV’s report

Ranked Cause Detail Impact Side Status Solution

RACH procedure crossing cell reselection

10ms RSSI spike.

Spike now limited by new RACH parameter recommendation.

Major UE Fix in progress impact reduced by parameters

Investigation finished but no solution provided.

Problem with existing UEs.

RACH parameter configuration

In case of UE issue, no limitation of maximum RACH power was defined.

Medium OAM

New parametersRecommended

Apply parameters in networks.

Change UPUG values.

RX cables swapIn Base Station

For example Cell0 UL is cabled in Cell1 and reverse for cell 1.

CriticalButLow

occurrence

BTS

To be checked in live networksIf suspected

Swap cables or change cable if deficient.

Incoherent behavior in UE at establishment.

Very low occurrence. But huge RSSI spike when occurring.

Last several 100ms.Major

But lowoccurence

UENot fixed No investigation leaded.

Operational teams have to check RX cables connectivity and may have to change RACH configuration parameter setting

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Operational Impact• Except for the BTS software issue, WNE

teams have to ensure that the identified operational issues (Missing Neighbors, unbalanced paths UL/DL or RX cables swap) are corrected before HSUPA activation

• Missing Neighboring cell analysis in UA4.2 in a large area (such RNC’s area) requires an extremely high amount of call trace collected that have to be post-processed by internal tool Not realistic in a short term analysis

• Therefore it will be mandatory to audit first UL RSSI in all cells eligible for HSUPA and removing cells without UL RSSI increase

• The UL RSSI audit analysis will be based on:

• Step 1: Based on RSSI counters, determine all the cells with RSSI instability

• Step 2: Based on OTCell+RFO, classification of the issue & assessment of the HSUPA risk

All sites eligible for HSUPA

Step 1: Audit of UL RSSI based on counters Sites ready for HSUPA

Step 2: OTCell analysis of the UL RSSI issue

Sites with Hardware issue

Sites with external source of interferences

Sites with short UL RSSI increase and low risk for HSUPA

Sites with long UL RSSI increase and high risk for HSUPA

Suspicion issues:- BTS Software issue not already corrected- Bad behavior of UESuspicion issues:

- Missing Neighbor declared-Unbalanced paths UL/ DL- RX cables swap- RACH configuration

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How to detect UL RSSI peaks based on counters in UA4.2?

• In UA4.2, 3 counters are available to estimate the UL RSSI per cell:• Via the RNC Counter #0303 VS.UplinkRssi (available every 15 min):

• Counter definition: Uplink RSSI received from NBAP common measurement per cell• Counter unit: 10^(-11,2) mW• Average UL RSSI (dBm) = -112+10*Log(#0303.[Avg]) • Max UL RSSI (dBm) = -112+10*Log(#0303.[Max])

• Via the 2 BTS Counters (available every 60 min)• Counter #10201 VS.RadioWBandRxMainPwr:

• Counter definition: min/ max/ linear average wide-band received power per sector, per frequency, at the Rx main channelizer (sampled every 100 ms)

• Average Wide-Band Rx Main Power (dBm) = -120+10*Log(#10201.[Avg])• Maximum Wide-Band Rx Main Power (dBm) = -120+10*Log(#10201.[Max])

• Counter #10202 VS.RadioWBandRxDivPwr:• Definition: min/ max/ linear average wide-band received power per sector, per frequency, at the Rx diversity

channelizer (sampled every 100 ms)• Average Wide-Band Rx Main Power (dBm) = -120+10*Log(#10202.[Avg])• Maximum Wide-Band Rx Main Power (dBm) = -120+10*Log(#10202.[Max])

• Metrics Library & thresholds associated will be provided by Core WNE based on the RSSI counters to detect quickly cells with frequent abnormal increase of UL RSSI

The average UL RSSI provided by counters are averaged in linear and are so highly impacted by very high and short UL RSSI spikes generated by BTS Software issue Call Trace activation required to distinguish RSSI Issues

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How to distinguish UL RSSI peaks based on Call Trace in UA4.2?

• OTCell traces can collect UL RSSI measurement from NBAP common measurement and then obtain UL RSSI per cell through RFO post-processing

• In order to limit the amount of data collected, it is recommended to trace only NBAP Common Measurement: OTCell template will be provided by Core WNE

• UL RSSI per cell variation is available depending on the periodicity of NBAP common measurement:

• RSSI with periodicity of 500 ms recommended

• Please find in this table the maximum number of cells that can be traced simultaneously:

RFO KPI & thresholds associated will be provided by Core WNE to distinguish UL RSSI short spikes and UL RSSI long increase that could

impact HSUPA Performance

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Field example 1: Distribution of minimum UL RSSI in MBK & Partner

•The metric used in this field example is: Daily average of min RSSI = Avg (VS.UplinkRssi.Min[dBm])

•The minimum UL RSSI is quite variable: most of cells between -109 dBm and -102 dBm in the 2 networks

•Need to check alarm for cells below –107dBm hardware issue suspected

•Cells with high minimum UL RSSI are also identified in case of external interferences

Distribution of Minimum UL RSSI in Partner's RNC, from 15/11 to 21/11

0.0%6.8%

16.5%

5.6%

21.3%

33.7%

12.4%

2.4% 0.4% 0.0% 0.4% 0.0% 0.4%0.0%

6.8%

23.3%

28.9%

50.2%

83.9%

96.4%98.8% 99.2% 99.2% 99.6% 99.6% 100.0%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

below -109dBm

[-109 dBm, -108 dBm

[

[-108 dBm, -107 dBm

[

[-107 dBm, -106 dBm

[

[-106 dBm, -105 dBm

[

[-105 dBm, -104 dBm

[

[-104 dBm, -103 dBm

[

[-103 dBm

, -102 dBm[

[-102 dBm, -101 dBm

[

[-101 dBm, -100 dBm

]

[-100 dBm, -99 dBm

[

[-99 dBm

, -98 dBm

[

[-98 dBm

, -97 dBm[

99% of cells between -109 dBm

and -102 dBm Min UL RSSI of UNE4069R is -97,3 dBm

Min UL RSSI of UNE4069R is -101,2 dBm

Min UL RSSI of UNE4069R is -99,9 dBm

Distribution of Minimum UL RSSI in Mobilkom's RNC, from 06/11 to 26/11

0.0% 1.1%5.4%

8.6%

23.0%

30.5%

17.8%

8.6%3.2% 0.5% 0.3% 0.0% 0.3% 0.5%

0.0% 1.1%

6.5%

15.1%

38.1%

68.6%

86.5%

95.1%98.4% 98.9% 99.2% 99.2% 99.5% 100.0%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%below

-109dBm

[-109 dBm

, -108 dBm

[

[-108 dBm

, -107 dBm

[

[-107 dBm, -106 dB

m[

[-106 dBm

, -105 dBm

[

[-105 dBm

, -104 dBm

[

[-104 dBm

, -103 dBm

[

[-103 dBm

, -102 dBm

[

[-102 dBm, -101 dB

m[

[-101 dBm

, -100 dBm

]

[-100 dBm

, -99 dBm

[

[-99 dBm, -98 dBm

[

[-98 dBm

, -97 dBm

[

[-97 dBm

, -96 dBm

[

99% of cells between -109 dBm

and -102 dBm

G719sU1 &U2 with: -101 dBm & -100,8 dBm

G660sU1 with-99,9 dBm

G009sU2 & G663sU3 with -97 dBm

G866sU3 with -97,5 dBm

Example

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Field example 2: Distribution of Daily Delta UL RSSI in MBK & Partner

•The metric used in this field example is: Daily delta UL RSSI = Max(VS.UplinkRssi.Avg[dBm]) - Avg (VS.UplinkRssi.Min[dBm]) •Based on the counters very high number of cells with Daily delta UL RSSI above 3 dB•UL RSSI stability will change significantly depending on the network:

• Only 20% of cells with Daily delta UL RSSI below 3dB in Partner while 63% in Mobilkom

• 55% of cells with Daily delta UL RSSI in Partner while only 4% in MBK

• 12% with Daily Delta UL RSSI in Partner while 0% in MBK

ExampleDistribution of Daily Delta UL RSSI (dB) in Partner's RNC, from 15/11 to 21/11

0.8%4.4% 6.0% 8.5% 8.5% 9.3% 7.7% 8.1% 9.3%

5.2%

21.0%

10.1%

1.2%0.8%

5.2%

11.3%

19.8%

28.2%

37.5%

45.2%

53.2%

62.5%

67.7%

88.7%

98.8% 100.0%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

[0 dB; 1 dB[

[1 dB; 2 dB[

[2 dB; 3 dB[

[3 dB; 4 dB[

[4 dB; 5 dB[

[5 dB; 6 dB[

[6 dB; 7 dB[

[7 dB; 8 dB[

[8 dB; 9 dB[

[9 dB; 10 dB[

[10 dB; 15 dB[

[15 dB; 20 dB[

[20 dB; 25 dB[

55% of cells with daily delta UL RSSI > 6dB


Only 20% of cells with daily delta UL RSSI < 3dB

UTC001T; UTC003S & UWE3063R

80 cells with Daily Delta UL RSSI >10dB

Distribution of Daily delta UL RSSI in Mobilkom's RNC, from 06/11 to 26/11

21.9% 22.7%18.4% 16.2%

8.1% 6.5%2.2% 1.6% 1.1% 0.8% 0.5%

21.9%

44.6%

63.0%

79.2%

87.3%

93.8%95.9% 97.6% 98.6% 99.5% 100.0%

0%

20%

40%

60%

80%

100%

120%

[0 dB; 1 dB[

[1 dB; 2 dB[

[2 dB; 3 dB[

[3 dB; 4 dB[

[4 dB; 5 dB[

[5 dB; 6 dB[

[6 dB; 7 dB[

[7 dB; 8 dB

[

[8 dB; 9 dB[

[9 dB; 10 dB[

[10 dB; 15 dB[


63% of cells with daily delta UL

RSSI < 3dB G397sU2&U3; G126sU3

G257sU1 & G848sU3

G397sU1; G754sU1;

G669sU1 & G257sU2

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Field example 3: Distribution of the duration with Daily Delta UL RSSI>6dB in MBK & Partner

•The metric used in this field example is: Number of 15 minutes per day with delta UL RSSI above 6dB•Some cells have frequent delta UL RSSI in Partner network but not in the MBK cells audited:

• Several Partner’s cells determined with long duration up to 6 hours of Delta UL RSSI above 6dB per day

• It confirms that UL RSSI stability will change significantly depending on the network

ExampleDistribution of Daily Delta UL RSSI (dB) in Partner's RNC, from 15/11 to 21/11

1.2%6.3% 7.9% 6.7%

22.9%17.8%

8.3% 7.1%3.6% 4.3% 2.4% 2.8% 0.8%

4.3% 2.0% 0.8% 0.4% 0.4%1.2%

7.5%

15.4%

22.1%

45.1%

62.8%

71.1%

78.3%81.8%

86.2%88.5%

91.3% 92.1%96.4% 98.4% 99.2% 99.6% 100.0%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0min

]0min; 5m

in[

[5min; 10m

in[

[10min; 15m

in[

[15min; 30m

in[

[30min; 45m

in[

[45 min; 1h[

[1h; 1h15min[

[1h15min; 1h30m

in[

[1h30min; 1h45m

in[

[1h45min; 2h[

[2h; 2h15min[

[2h15min; 2h30m

in[

[2h30min; 3h[

[3h; 4h[

[4h; 5h[

[5h; 6h[

[6h; 7h[

22% of cells with more than 1 hour

already fully loaded

Only 22% with less than 1 fully loaded

quarter hour UTC0001T & UWE3079S

UTC0003R

UWE0966S

Distribution of duration with Daily delta UL RSSI>6dB in Mobilkom's RNC, from 06/11 to 26/11

31.4%

50.8%

11.9%

3.0% 2.4% 0.3% 0.0% 0.3%

31.4%

82.2%

94.1%97.0% 99.5% 99.7% 99.7% 100.0%

0%

20%

40%

60%

80%

100%

120%

0 min

]0min, 5m

in[

[5min, 10m

in[

[10min, 15m

in[

[15 min, 30 m

in[

[30 min,45 m

in[

[45 min; 1h[

[1h; 1h 15min[

Only 97% with less than 1 fully loaded

quarter hour

G848sU3 G754sU1

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Field Example 4: OTCELL- UL RSSI evolution in MBK worst cells

Cell UL Load>= Rot MAx

Cell UL Load >= 50%

min RSSI -106

mean 0.1Max 32.8Min 0

total sample 21558T

nbsample with delta>=6 99 0.5% 0.8nbsample with delta>=3 165 0.8% 1.4

value of delta (RSSI-min RSSI)

sample with delta>=6 occurrence1 (isolated) 232 (successive) 133 (successive) 144 (successive) 2

28/11

30/11Min RSSI -106.2

Delta (RSSI-minRSSI)

Mean 0.14

Max 31.3

Min 0

Total sample 21461

Nb sample with delta>=6 108


Some UL RSSI short spikes up to 33dB•Most of UL RSSI measurements above 6dB are isolated

•Average value of delta RSSI is very low: 0.1•Nb sample with delta>=3 & 6 are comparable

Cell with UL RSSI due to BTS SW or UE Issue

Example

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Field Example 5: OTCELL- UL RSSI evolution in MBK worst cells

Cell UL Load>= Rot MAx

Cell UL Load >= 50% sample with delta>=6 occurrence1 (isolated) 1132 (successive) 423 (successive) 134 (successive) 26 (successive) 211( successive) 1

min RSSI -104.6

mean 0.9Max 40.8Min 0

total sample 21566T

nbsample with delta>=6 266 1.2% 2.2nbsample with delta>=3 993 4.6% 8.3

value of delta (RSSI-min RSSI)

30/11

28/11

Min RSSI -104.9


Mean 1.1

Max 32.1

Min 0

Total sample 21567



Example

Some UL RSSI short spikes up to 41dB•Most of UL RSSI measurements above 6dB are isolated

•Average value of delta RSSI is medium: 1dB•Nb sample with delta>=3 is much higher than delta>=6

Cell with potentially neighboring issue

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Field Example 6: OTCELL- Partner- UL RSSI evolution in Partner worst cells

10/12

Min RSSI -104.8*


Mean 2.35

Max 36.6

Min 0

Total sample 28582



Example

Some UL RSSI long increase up to 37 dB•Average value of delta RSSI is high: 2,35 dB

•Nb sample with delta>=3 is higher than delta>=6 Cell with neighboring issue suspected

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Detected Set Reporting Feature Overview

• The objective of this feature is to help the operator to optimize its neighboring plan

• Intra-Frequency Full Event trigger feature is mandatory to enable detected set feature

• When detected set feature is activated, the UE triggers 1A, 1C, 1E or 1D events based on FET criteria both on detected set and monitored set

• However, the detected set cells will not be used in the mobility algorithms but it can be considered as potential new neighboring cells.

Some detected cells are monitored in “measuredResults” field without triggering any Event some detected cells with low EcN0 doesn’t worth to

be considered

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How to ensure that it is due neighbor missing?

•If based on UL RSSI analysis through OTCell, Missing Neighboring cell declared is suspected then it is recommended to activate detected set feature:

• Full Event Trigger activation on the cells • isDetectedSetCellsAllowed Parameter set

to “True” …and to monitor the number of call trace failure indicating detected cell during at least 1 week:

• counter #1027 VS.MeasCallFailTraceDetectedCell

•Note that the counter shall increment on the primary cell with the missing neighboring cells declared and not in the missing neighboring cell with UL RSSI impacted•If there is representative number of Call Trace Failure indicating detected cell then missing neighbors are suspected and could be a reason of abnormal UL RSSI increase Neighboring Optimization Analysis (see next slides)

-105

-100

-95

-90

-85

-80

-75

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15/11/2006 16/11/2006 17/11/2006 18/11/2006 19/11/2006 20/11/2006 21/11/2006

0

200

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VS.UplinkRssi.Avg VS.MeasCallFailTraceDetectCell.FullEvt

•Refer to the example above showing one cell from Partner network with frequently high average UL RSSI the cell is not declared as neighbor in other cells ….and on the same periods high number of detected cells reported up to 2000 neighboring cells declaration are missing for this primary cell

22

Cell2 if not declared in Cell1 neighborhood.

When UE is moving from cell 1 to cell2, active set update is not triggered.

When UE is going closer to Cell2, UE signal is received very strong by Cell2.

Because UE is not in soft handover, there is no innerloop to adjust the TX power of UE to correct level for Cell2.

The call will drop at the end, but a temporary huge RSSI increase will happen meanwhile.

Missing cell in neighborhood

Cell1 Cell2

Direction of moving

Detected set reported and counter #1027

incremented

Detected set reported and counter #1027 incremented

RSSI increase reflected by the counter#0303

23

Neighbor Optimization processGlobal process

Neighbouring Analysis

DRF Update

SC Planning Analysis

CNL Activation

Detected set activated

CNL deactivated

Missing or Inactive cell or

active compound cell?

Duplicated cell?

DRF Update

Yes

No

Yes

No

CNL activated ?

No

CNL Deactivation

Start Point

Yes

Neighbouringanalysis part

SC planning analysis part

• Core WNE recommends to apply these following steps:

• Step 0: Start point• Activate Event Trigger feature

(isEventTriggeredMeasAllowed = True)• Activate detected set feature

(isDetectedSetCellsAllowed = True)• Deactivate CNL feature

(isCompoundingCellListActivated = False)• Step 1: Neighboring Analysis

• To detect the inactive neighbor cells which are never in the active set

• To detect the missing neighbor cells which are reported in the MR thanks to detected set feature

• Step 2: CM xml file update • Inactive neighbor deletion• Missing neighbor addition

• Step 3: SC Planning Analysis based on the new CM xml file

• Identification of all potential duplicated SC• Proposal of new Scrambling Code for all

problem cells • Step 4: CNL activation• Step 5: To go back to Step 1

• To detect Active Compound cells which are often in the active set and which deserves to be direct neighbor of the primary cell • All the operational details and the thresholds are provided in

the reference document Mobility Optimization Guidelines (UMT/IRC/INF/020462 V01/EN), that can be found in the Livelink: http://eur-livelink.europe.nortel.com/livelink/livelink.exe?func=ll&objId=27467504&objAction=browse&sort=name

http://eur-livelink.europe.nortel.com/livelink/livelink.exe?func=ll&objId=27467504&objAction=browse&sort=name











24

UA4.2 neighbouring analysis methodologyBased on CTg logs collection post-processed by Odinium/ RFO Tool

• Odinium tool is already available to do this neighbouring optimization analysis while implementation in RFO tool is on finalization

• RFO/ Odinium analysis is based on the CTg traces which can not collect more than 10 simultaneous calls per TMU to reach the expected reliability criteria, several hours of traces are needed

• RFO/ Odinium indicators:• For each primary cell (PC), several indicators are computed for all its

monitored cells (nbi):• Re-Ref/Min: is the primary cell change frequency from PC to nbi• ASAdd/min: is SHO leg Addition (nbi) frequency• %Active Time: is the proportion of time nbi was in the active set • Primary cell duration • Detected cell: its SC with number of occurrences and the best EcNo measurement

Odinium isn’t supported in mid-term Neighboring Tuning algorithm in RFO is a mandatory pre-requisite

25

UA5.0 neighbouring analysis methodologyBased on CTn Reports from CTn traces

• CTn traces will be available for UA5.0• CTn collects only the mobility data without UE cell measurements. For that reason, CTn will handle

much more calls per TMU than the CTg (around 300 calls per TMU)• CTn logs are post processed with a web based internal tool (Wireless Quality Analyzer) connected

to a server running on PC hardware:• Generate several reports• Operational time gain• Only “soft handover” report and “detected cell” report will be used for Neighbouring analysis

• WQA needs specific PC hardware and software licence• For each couple (primary cell, neighbour cell), several useful indicators for neighbouring analysis are

computed:• RL addition: is the equivalent of “ASAdd/min” Odinium metric• SHO duration : is the equivalent of %Active Time Odinium metric• Outgoing reference change : is the equivalent of “Re-Ref/Min” Odinium metric• Neighbouring type (N: neighbour, C: composite)• Detected cell: specific report with number of occurrences

• Radio Measurements are not considered in CTn to increase the collection capacity ECN0 reports are not informed when identify detected cells CTg+RFO still needed to end the analysis

Neighboring Tuning Analysis in a large area have to be performed with CTn+WQA for capacity reasons and for saving post-processing time

26

Field Example 6: Detected cell analysis with CTg/ Odinium in ORF

Cellule pour CTg Detected Cell SCDetected Cell Name Average Min UL RSSI Delta UL RSSI Detected Cell SCDetected Cell Name Average Min UL RSSI Delta UL RSSIBELLE_DE_MAI_U21 s234 x503 -6 ST_MARTHE_U21 -105.98 0.18 s314 x272 -9 MARSEILLE_GIBBES_U21 -104.22 0.42FERREOL_U31 s304 x143 -6 MARSEILLE_PORTE_D_AIX_U11 -104.22 0.64 s66 x196 -4 MARSEILLE_JULIEN_U11 -108.99 1.5GRANDE_BASTIDE_U11 s316 x115 -11 MARSEILLE_LACADENELLE_U11 -105.01 0.06GRANDE_BASTIDE_U31 s13 x60 -10 LE_MERLAN_IUT_U21 -105.98 0.07 s316 x392 -8 MARSEILLE_LACADENELLE_U11 -105.01 0.06HOPITAL_NORD_U11 s159 x43 -9 MARSEILLE_MICHELET_U31 -105.98 0.37JOLIETTE_DOCKS_U11 s18 x138 -4 MARSEILLE_BOREL_U21 -105.01 0.41 s68 x44 -7 ST_LAMBERT_U11 -107.23 0.62LA_PLAGE_U21 s9 x203 -8 MARSEILLE_AIRELLES_U11 -105.98 0.07 s130 x30 -11 MARSEILLE_LE_REDON_U11 -107.23 0LA_PLAGE_U31LA_ROSE_U21 s293 x121 -4 MARSEILLE_PARTY_U21 -104.22 0.01LE_FRIOUL_TDFT_U11 s32 x501 -4 LA_GROTTE_ROLLAND_U21 -107.23 0.05 s361 x81 -6 MARSEILLE_LA_ROSERAIE_U11 -105.98 0.14LES_OLIVES_U21 s254 x86 -11 to find the cell nameMARSEILLE_BEAUVAU_U31 s145 x282 -6 MRS_MONTE_CRISTO_TDFT_U31 -105.01 0.85 s325 x232 -8 MARSEILLE_LA_PLAINE_U11 -107.23 0.08MARSEILLE_BLANCARDE_U21 s273 x195 -8 MARSEILLE_CASTEL_ROC_U21 -105.98 0.19 s58 x173 -8 MARSEILLE_FELIBRE_U31 -105.98 0.28MARSEILLE_BOREL_U21MARSEILLE_CLARY_U11 s68 x68 -6 ST_LAMBERT_U11 -107.23 0.62 s18 x87 -6 MARSEILLE_BOREL_U21 -105.01 0.41MARSEILLE_DAVID_U11 s94 x39 -10 GRANDE_BASTIDE_U31 -102.97 0.72MARSEILLE_DUPARC_U31 s336 x198 -9 MARSEILLE_MALPASSE_U21 -105.01 0.77 s286 x248 -6 MARSEILLE_FAUVETTES_U31 -105.98 0MARSEILLE_FAUVETTES_U31 s164 x208 -6 MARSEILLE_DUPARC_U31 -107.23 0.08MARSEILLE_GUIEU_U11MARSEILLE_JULIEN_U11 s46 x179 -9 MARSEILLE_SAINTE_U31 -105.98 0.55MARSEILLE_LA_CAPELETTE_U31MARSEILLE_LA_PANOUSE_U31 s159 x471 -8 MARSEILLE_MICHELET_U31 -105.98 0.37MARSEILLE_LACADENELLE_U11 s75 x64 -10 ST_LOUP_UMTS_U31 -107.23 0.73MARSEILLE_LESSEPS_U31 s68 x197 -5 ST_LAMBERT_U11 -107.23 0.62 s18 x417 -6 MARSEILLE_BOREL_U21 -105.01 0.41MARSEILLE_MARENGO_U11 s164 x29 -8 MARSEILLE_DUPARC_U31 -107.23 0.08MARSEILLE_MATHURIN_U21MARSEILLE_MATHURIN_U31 s50 x981 -7 MARSEILLE_LA_PANOUSE_U31 -105.98 0.17 s316 x72 -10 MARSEILLE_LACADENELLE_U11 -105.01 0.06MARSEILLE_MICHELET_U11 s1 x357 -6 MARSEILLE_CLARY_U11 -106.13625 0.21625MARSEILLE_NOTRE_DAME_U11MARSEILLE_PARTY_U21MARSEILLE_SAINTE_U31 s304 x131 -11 MARSEILLE_PORTE_D_AIX_U11 -104.22 0.64 s299 x58 -7 MARSEILLE_ST_NICOLAS_U31 -107.23 0.03MARSEILLE_ST_NICOLAS_U31MARSEILLE_VALLON_U11 s18 x339 -6 MARSEILLE_BOREL_U21 -105.01 0.41 s321 x277 -7 MARSEILLE_ZI_U21 -105.98 0.48MRS_MONTE_CRISTO_TDFT_U31 s165 x868 -8 MARSEILLE_NOTRE_DAME_U11 -105.98 0.97 s58 x778 -8 MARSEILLE_FELIBRE_U31 -105.98 0.28PARC_DES_EXPOSITIONS_U31RABATEAU_U31 s99 x476 -8 MARSEILLE_MATHURIN_U31 -107.23 0.11ST_LAMBERT_U11 s282 x46 -8 MARSEILLE_LE_ROUET_U31 -105.98 0.18 s150 x153 -6 ST_MAURONT_U31 -107.23 0.13ST_LOUP_UMTS_U11 s153 x34 -8 MADRAGUE_DE_LA_VILLE_U31 -107.23 0.05 s36 x149 -4 ST_JEAN_DU_DESERT_U21 -105.98 0.02ST_MARTHE_U21ST_MAURONT_U11ST_MAURONT_U31 s18 x964 -6 MARSEILLE_BOREL_U21 -105.01 0.41 s68 x1443 -4 ST_LAMBERT_U11 -107.23 0.62

Detected Cell N°1 Detected Cell N°2Cells detected up to 1000 times in 2 hours with good EcN0

No important increase of UL RSSI for detected cells

Declaration of “worth” detected cells will not automatically improve significantly the UL RSSI first step with Audit UL RSSI is mandatory

27

HSUPA Introduction Methodology Planning Delivery

• The HSUPA Introduction Methodology status and planning are:• The audit of UL RSSI stability based on counters and OTCell is on

finalization• Missing Neighbors analysis based on CTg/ Odinium is on-going• Missing Neighbors analysis based on CTg/ RFO is on-going and

plan to be validated in Mobilkom pre-Cur Trial• Missing Neighbors analysis based on CTn/ WQA is not started and

plan to be tested in Mobilkom pre-Cur Trial• Validation by Core WNE of the full HSUPA Introduction Methodology

during pre-Cur Mobilkom Trial ready for execution by all local WNE from W15 with the support of Core WNE

• The complete HSUPA & HSDPA Introduction Methodology will be described in the UA5.0 HSxPA Engineering Handbook

28

Back-Up

29

UL RSSI/ RTWP Definition & Computation at Node B

• In 3GPP (TS25.215 section 5.2.1) RTWP is used for uplink RSSI (RTWP stands for Receive Total Wideband Power): “The received wide band power, including noise generated in the receiver, within the bandwidth defined by the receiver pulse shaping filter. The reference point for the measurement shall be the Rx antenna connector. In case of receiver diversity the reported value shall be linear average of the power in the diversity branches.”

• Since the level shall be estimated on a bandwidth corresponding to a single UMTS carrier, the measurement shall be done after channel filtering.

• In the TRM/iTRM, the level is measured within the block “Mean Square Power Measurement block” of the Rx channelizer. Internally, two power indications MSPD_PWER1 and MSPD_PWER2 respectively for the main and the diversity branches are used to evaluate the level at the Analog-to-Digital Converter (ADC) input.

• The reference point of the RTWP being the antenna connector, calculation should estimate the total loss in between the TRM/iTRM ADC and the antenna connector. This includes the subtraction of all amplifications and the addition of all losses in between. Two values RTWP1 and RTWP2 respectively for the main and the diversity paths are computed.

• The uplink RSSI (RTWP) reported to the RNC as per 3GPP definition will then be computed from RTWP1 and RTWP2 as the linear average of those two values

30

UL RSSI variation due to UL Load?•Correlation on the most loaded cells between the UL Traffic and the UL RSSI (average or max) or between the number of RACH and the UL RSSI (average or max) and we concluded that it is not possible to directly link the impact of the UL Traffic or the number of RACH to the increase of UL RSSI. To confirm that assessment:

• the 10 cells with highest UL Load in Mobilkom network and the 10 cells with the highest Delta UL RSSI the 20th of October are not the same

• The UL amount of traffic transferred in all day is from 117 Mbytes to 219 Mbytes but the Delta UL RSSI didn't follow the same ranking and so double check that the UL Traffic is not the current main cause of the UL RSSI increase

as indicated by the UIIV analysis, there are other causes impacting the UL RSSI on your network

UL Traffic (Kbytes) Min[VS.UplinkRssi.Min] (dBm) Avg[VS.UplinkRssi.Avg] (dBm) Max[VS.UplinkRssi.Avg] (dBm) Delta UL RSSI (dBm) Avg[VS.UplinkRssi.Max] (dBm) Max[VS.UplinkRssi.Max] (dBm)G397sU3 219 871 -106 -105 -100 6.1 -101 -82G397sU1 178 595 -105 -104 -99 6.4 -100 -80G201sU3 164 857 -104 -104 -95 9.0 -100 -77G257sU1 162 771 -107 -107 -103 3.9 -103 -87G201sU2 151 655 -103 -103 -98 4.9 -100 -81G201sU1 146 945 -102 -102 -99 3.1 -99 -84G513sU3 130 728 -104 -103 -90 14.6 -90 -70G257sU2 125 187 -106 -106 -102 3.6 -102 -86G282sU2 119 617 -106 -106 -105 1.5 -103 -94G126sU2 118 563 -105 -104 -93 12.5 -101 -73G174sU3 117 079 -103 -103 -102 0.6 -101 -92

Delta UL RSSI (dBm) Min[VS.UplinkRssi.Min] (dBm) Avg[VS.UplinkRssi.Avg] (dBm) Max[VS.UplinkRssi.Avg] (dBm) UL Traffic (Kbytes) Avg[VS.UplinkRssi.Max] (dBm) Max[VS.UplinkRssi.Max] (dBm)G736sU1 17.7 -102 -100 -84 -86 -67G662sU3 16.3 -104 -101 -87 -87 -69G126sU3 16.2 -105 -102 -89 52 799 -88 -70G311sU2 15.7 -104 -103 -89 96 586 -88 -69G343sU2 15.7 -107 -105 -91 19 537 -91 -72G754sU1 14.8 -105 -102 -90 -98 -88G513sU3 14.6 -104 -103 -90 130 728 -90 -70G142sU3 14.1 -104 -103 -90 6 128 -90 -71G112sU1 13.8 -105 -104 -91 46 734 -92 -73G740sU2 13.6 -104 -103 -90 -92 -73

31

VS.UplinkRssi.Avg (dBm) in UWE0966S, from 15/11 to 21/11

-105

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30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

45 2

1:00

21:

15 2

1:30

21:

45 2

2:00

22:

15 2

2:30

22:

45 2

3:00

23:

15 2

3:30

23:

45

15/11/2006 16/11/2006 17/11/2006 18/11/2006 19/11/2006 20/11/2006 21/11/2006

Average UL RSSI evolution for the worst cells in Partner (1/3)

•Every working day the average UL RSSI is above 6dB during all the busiest hour with few peaks exceeding 20 dB!•HSUPA can not be introduced in this cell•Missing Neighbor is suspected since the delta increase during all the busiest hours of the day requires confirmation with detected set reports

Cell UL Load = 100%

Cell UL Load = 50%

32

VS.UplinkRssi.Avg (dBm) in UTC0003R, from 15/11 to 21/11

-110

-105

-100

-95

-90

-85

-80

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

45 2

1:00

21:

15 2

1:30

21:

45 2

2:00

22:

15 2

2:30

22:

45 2

3:00

23:

15 2

3:30

23:

45

15/11/2006 16/11/2006 17/11/2006 18/11/2006 19/11/2006 20/11/2006 21/11/2006


•More peaks in UTC0003R than in UWE0966S but globally the increase of UL RSSI is less important•Introduction HSUPA still highly risky•Missing Neighbor is suspected since the delta increase during all the busiest hours of the day requires confirmation with detected set reports

Cell UL Load = 100%

Cell UL Load = 50%

33

VS.UplinkRssi.Avg (dBm) in UTC0001T, from 15/11 to 21/11

-107

-102

-97

-92

-87

-82

-77

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

1:45

02:

00 0

2:15

02:

30 0

2:45

03:

00 0

3:15

03:

30 0

3:45

04:

00 0

4:15

04:

30 0

4:45

05:

00 0

5:15

05:

30 0

5:45

06:

00 0

6:15

06:

30 0

6:45

07:

00 0

7:15

07:

30 0

7:45

08:

00 0

8:15

08:

30 0

8:45

09:

00 0

9:15

09:

30 0

9:45

10:

00 1

0:15

10:

30 1

0:45

11:

00 1

1:15

11:

30 1

1:45

12:

00 1

2:15

12:

30 1

2:45

13:

00 1

3:15

13:

30 1

3:45

14:

00 1

4:15

14:

30 1

4:45

15:

00 1

5:15

15:

30 1

5:45

16:

00 1

6:15

16:

30 1

6:45

17:

00 1

7:15

17:

30 1

7:45

18:

00 1

8:15

18:

30 1

8:45

19:

00 1

9:15

19:

30 1

9:45

20:

00 2

0:15

20:

30 2

0:45

21:

00 2

1:15

21:

30 2

1:45

22:

00 2

2:15

22:

30 2

2:45

23:

00 2

3:15

23:

30 2

3:45

00:

00 0

0:15

00:

30 0

0:45

01:

00 0

1:15

01:

30 0

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15/11/2006 16/11/2006 17/11/2006 18/11/2006 19/11/2006 20/11/2006 21/11/2006


•High Delta UL RSSI concentrated but very high delta•Introduction HSUPA still highly risky•Missing Neighbor is suspected since the delta increase during all the busiest hours of the day requires confirmation with detected set reports

Cell UL Load = 100%

Cell UL Load = 50%

34

30ms demodulation blinding for new legsWhen softer leg is added, NodeB is sometimes “blind” during 30ms.NodeB emits « UP » commands toward UE.Tx power spike of 30dB is created.

-10

0

10

20

30

40

50

60

0.00

100000.00

200000.00

300000.00

400000.00

500000.00

600000.00

700000.00

Number of cellsUE Tx PowerFinger power cell 0Finger power Cell 1

UL is blind temporarily

Noise profile is jammed.Risk for finger tracking

35

Early RL RESTORE issueNodeB sometimes trigger RadioLinkRestoreIndication with no signal, then send all “UP” TPC commands toward UE.=> UE TX power overshoot ideal convergence power, generating RSSI spike.

-10

0

10

20

30

40

50

60

2523

2530

2537

2544

2551

2558

2565

2572

2579

2586

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2600

2606

2613

2620

2627

2634

2641

2648

0

100000

200000

300000

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500000

600000

700000

800000

900000

UE Tx Power

Finger power

36

Antenna of cell 1 is connected to Cell2

Antenna of cell 2 is connected to Cell1.

UE in Cell1 is forced to emit very strong to reach antenna 2.

Antenna 1 is blinded by UE.

TRM RX cable crossing

Antenna 2

Antenna 1

Cell 2

Cell 1

37

UE ISSUE description – interfrequency reselection

In following graphs, issue is detected when AICH status is NO-ACK = 0, identified by magenta circles.

It appears UE sometimes fail to decode AICH when RACH procedure crosses cell reselection procedure.

The UE then increases TX power of preamble up to maximum, creating a noise spike in BTS receiver.

The case where RACH NACK appear is rather similar: The AICH is not decoded by UE and NodeB, overloaded, finally nacks preambles. When UE recover AICH decoding, it decodes NACK that is sent in response to each preamble by NodeB.The procedure immediately stops.

38

UE ISSUE description – interfrequency reselectionRACH cell Id 7 is carried by Nortel NodeB RACH cell id 13 is carried by other NodeB

0

2

4

6

8

10

12

14

06:40:56.352 06:40:58.080 06:40:59.808 06:41:01.536 06:41:03.264 06:41:04.992 06:41:06.720 06:41:08.448-200

-150

-100

-50

0

50

Status (1:ACK 0:NO ACK 2:NACK)number of preamblesRACH Cell idLast Preamble PowerCPICH RSCP

Issue

39

UE ISSUE description – intracell reselectionScrambling code 202 and 200 are carried by same frequency

0

5

10

15

20

25

30

0 200 400 600 800 1000 1200-200

-150

-100

-50

0

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Status (1:ACK 0:NO ACK 2:NACK)number of preamblesRACH cell idLast preamble powerCPICH RSCP

Issue

40

RACH optimization in iFUN

41

RACH optimization in iFUNRACH statistics about preamble detection was measured for Nortel IFUN NodeBs using nominal parameters. One UE was logged for 10 minutes, moving all over iFUN.Here is an extract of decoded log. Number of preambles is in yellow.

42


85% of preamble are detected with 1 attempt.99.5% are detected with 10 attempts (10dB ramp up)

Initial TX power is raised to increase success rate at first preamble (constant value is modified from -20 to -17)

Power step is increased to reduce RACH loading (set to 4dB)

Maximum number of preamble is limited to have a ramp-up of maximum 12dB (3 retransmission)

These parameters will grant to have more than 99.5% of preamble success in iFUN.In case more than one preamble is necessary, this parameters privileges RACH capacity over TX power consumption.

=> These parameters are not yet UPUG recommendation. Exhaustive multipath and fading tests shall be done to have a tradeoff between all customer networks.

43


BEFORE AFTER

Preamble success detection PDF

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

110.00%

0 5 10 15 20

Number of RACH preamble

0

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2000

Cumulative %

Frequency

Preamble success detection PDF

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

110.00%

0 5 10 15 20

Number of RACH preamble

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100

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700

Frequency

Cumulative %

HUSPA Introduction Methodology KTS UA5%2E0

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Transcript of HUSPA Introduction Methodology KTS UA5%2E0