UMTS Introduction of Network Coverage Evaluation Based on MR0309

(1)

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Security Level:

Introduction of Network Coverage

Evaluation Based on MR

(2)

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 MR based Geolocation Principle Introduction



MR Basic and Location principle

 Traffic map value

 Coverage Evaluation Introduction

 AGPS MR Collection

 Coverage Evaluation based on AGPS MR

(3)

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Security Level:

MR Traffic Map Solution Overview

Geographical visualization of

RSCP，ECIO，UE Power and Cell

Edge based on real user

information

Accurate Coverage Visualization

With configurable thresholds

and parameters, auto identify

spots with poor coverage, pilot

pollution and overshooting

problems

Coverage Problems Auto Identification

Spot with Weak Coverage

New site address is auto located

according to weak coverage spots

and users distribution

Smart Site Planning

(4)

Measurement Control

Measurement Report

Periodic Trigger

(MR Module)

Event Trigger

(HO Module)

MR MAP :

According to corresponding

locating algorithm, make the

information brought by UE

(such as RSCP, Ec/Io, TX

Power and so on) display on

the map.

(5)

英文标题:32-35pt 颜色: R153 G0 B0 内部使用字体 : FrutigerNext LT Medium 外部使用字体 : Arial 中文标题:30-32pt 颜色: R153 G0 B0 字体:黑体英文正文:20-22pt 子目录 (2-5级) :18pt 颜色:黑色内部使用字体 : FrutigerNext LT Regular 外部使用字体 : Arial 中文正文:18-20pt 子目录(2-5级):18pt 颜色:黑色 字体:细黑体 配色参考方案：建议同一页面内不超过四种颜色，以下是13组配色方案，同一页面内只选择一组使用。（仅供参考）伙伴的标志放在右上角.

MR Location Calculation Process

Calibrated Engineering Parameter

Feature Database

MR Data

Location Calculation

Time

IMSI

RNC

Cell

Longitude

Latitude

9/16/2010 13:29:13.600 440001090253516 2305 23405 140.116544 36.12388

9/16/2010 13:29:23.600 440001090253516 2305 23405 140.117095 36.124334

…… …… …… …… …… ……

Calculated Location

Point

(6)

Locating Principle：CELLID+RTT、Feature matching Method、AGPS

1.CellID + RTT

From RTT measurement results,

calculates the distance from the UE

to serving cell, 1 RTT result

determines 1 circle, 3 results

determine 3 circles, and the cross

points of the 3 circles are the real

location.

Signal Features

Moving Unit

2. Feature matching Method

Use the methods of DT,AGPS and

coverage simulation to establish

network feature database, such as

RSCP, Path info, Time Delay etc.

And then compare MR with the

feature database. Ue location is

where the bin match best.

3.AGPS

RNC collect information related

to GPS satellites, and the data

is given to the UE needed for

positioning, UE search to GPS

satellite signals and estimate

location.

Traffic Map Introduction -

MR Location principle

(7)

Baseline of MR Location Accuracy

 Scenario not applicable to:

 Single sites only

 Site on hill /Sea / Lake

Parameters

Input / Output

U / SU

Traffic map accuracy

*note 1

Output

80 – 120m

Site distance

Input

300 – 800m

Minimum MR message collection on

each position

Input

5000 MR Messages

Site Lat / Long tolerance

Input

< 15m

Antenna azimuth tolerance (Max)

Input

< 10 degree

Drive test data support (Cover major

road)

Input

Yes

Digital map resolution

Input

5m (with building information)

*Note 1: The output accuracy is subject to the input requirement as specified.

 Digital map resolution>50m，the impact for accuracy is about 20%~30%.

 No drive test : for modified feature database, the impact for accuracy is about 30%.

for propagation model ,the impact for accuracy is about 30%.

(8)

DT/CQT MR Accuracy

Scenario

Accuracy

CQT

14m @ 67%

DT

34m @ 67%

DT Scenario

CQT Scenario

(9)

MR Location Accuracy by Using AGPS to Correct Character DB

Character DB

Accuracy

Before Correction

626m @ 67%

After Character DB

Correction Using AGPS Data

153m @ 67%

Using AGPS Data to

Forming Character DB

87m @ 67%

Specification:

 Before Correction: Using simulation method by propagation model to

make the character DB WITHOUT any data correction.

 After Character DB Correction Using AGPS Data: Based on the

prediction character DB, Using the AGPS data to correct the prediction

character DB.

(10)

 MR based Geolocation Principle Introduction

 MR Basic and Location principle



Traffic map value

 Coverage Evaluation Introduction

 AGPS MR Collection

 Coverage Evaluation based on AGPS MR

(11)

Traffic Map Analysis Value

1.Real user RSCP coverage

2.No drive test Required

RSCP Distribution

1.Real user Ec/Io coverage

2.No drive test Required

Ec/Io Distribution

1.Real user serving cell distribution

2.More precise than simulation result

Serving Cell Edge Distribution

1.Overshooting Analysis

2.Handover Analysis

3.Interference Analysis

4.Traffic Unbalance Analysis

(12)

Traffic Map Analysis Value

Call Drop Rate Distribution

Type UE Distribution(Example for iphone)

Real user distribution/High User Spot Distribution

(13)

 MR based Geolocation Principle Introduction

 MR Basic and Location principle

 Traffic map value

 Coverage Evaluation Introduction



AGPS MR Collection

 Coverage Evaluation based on AGPS MR

(14)

Coverage Assessment Workflow - General

Coverage Performance Assessment

F ie ld E n g in e e r N a st a r/ M a p in fo /A rc G IS P ro b e A ss is ta n t U -n e t O m st a r S e rv e r/ N a st a r V 6 R 1 0 L M T 005.005.001 Activate MR period Reporting Raw MR data (7 days) · Engineering Parameter · Digital MAP Generate the Feature Database 003.004 005.005.005 Geo-Location Processing · DT Data Adjust Propagation Model (Optional) 005.005.004 005.005.002 Activate AGPS Reporting (Optional) GIS Display 005.005.006 Coverage Audit 005.005.007 Interference Audit 005.005.008 005.005.009 Hotspot Audit 005.005.003 KPI Monitoring Output Coverage Evaluation Report 005.005.010

Collect the data

002 Cell/RNC/LAC Edge Audit 005.005.0011 005.005.012 Output Topology Evaluation Report

(15)

(16)

Coverage Assessment Workflow – Based on AGPS

Specification:



Emphasis on how to collect

AGPS MR data



Other steps can be referred in instructions.

Mapping method is helpful

to give rise and investigate to

obvious RF problems

(17)

How to collect the AGPS MR data



Standalone mode:

DO NOT need GPS hardware support,

UE can search satellite to locate.



UE Based mode: Network sends

the satellite data to UE, and help UE to

search the satellite, then UE computes

the location:



GPS hardware can be integrated in the

GCGa board, and also can be independent

by using GCUa + GPS.



Generally, One RNC configures one GPS.

(1)

AGPS function is controlled by license, so we need confirm whether the license can

be valid : LST LICENSE:FN=“*********.dat”;

(18)

MML Command for AGPS MR Collection

RNC：

SET UMRCTRL:

MRTRAFFICTYPE=TRAFFIC_AMR-1&TRAFFIC_VP-1&TRAFFIC_BE-1&TRAFFIC_OTHER-1,

MRINTRAFREQPERIOD=D12,

MRRPRTCFGSWITCH=MR_PRD_INTRA_FREQ_MEAS_SWITCH_1-

1&MR_EVT_INTRA_FREQ_MEAS_SWITCH_2-1&MR_PRD_INTER_FREQ_MEAS_SWITCH_3-

1&MR_EVT_INTER_FREQ_MEAS_SWITCH_4-1&MR_PRD_INTER_RAT_MEAS_SWITCH_5-

1&MR_EVT_INTER_RAT_MEAS_SWITCH_6-1&MR_DL_BLER_MEAS_SWITCH_7-

0&MR_UE_TX_POWER_MEAS_SWITCH_8-0&MR_UL_SIR_MEAS_SWITCH_9-0&

MR_LCS_MEAS_SWITCH_10-1

&MR_RACH_MEAS_SWITCH_11-0,

MRLCSMETHODSWITCH=LCS_AGPS_UEBASED_SWITCH_1-1&LCS_AGPS_STANDALONE_SWITCH_2-0

&LCS_CELLID_RTT_SWITCH_3-1, MRDLBLERPERIOD=D12, MRUETPPERIOD=D12, MRULSIRPERIOD=D12,

MRLCSPERIOD=D12;

SET USMLC:

SMLCMETHOD=CELLID_CENTER-1&CELLID_RTT-1&OTDOA-1&AGPS-1,

AGPSMETHODTYPE=UE_BASED,

AGPSADDASSDATASENDFLAG=DELIVERY,

UEASSAGPSASSDATASWITCH=REFERENCE_TIME_FOR_GPS-1&REFERENCE_LOCATION_FOR_GPS-

1&DGPS_CORRECT-0&GPS_NAVGMODEL-1&GPS_IONOSPHERIC_MODEL-0&GPS_UTC_MODEL-0&GPS_ALMANAC-0&GPS_ACQ_ASSIST-1&GPS_REALTIME_INTEGRITY-0,

UEBASAGPSASSDATASWITCH=REFERENCE_TIME_FOR_GPS-1&REFERENCE_LOCATION_FOR_GPS-1&DGPS_CORRECT-1&

GPS_NAVGMODEL-0

&GPS_IONOSPHERIC_MODEL-1&GPS_UTC_MODEL-0&GPS_ALMANAC-0&GPS_ACQ_ASSIST-0&GPS_REALTIME_INTEGRITY-1, MAXGPSSATS=16,

OTDOAMETHODTYPE=UE_ASSISTED, CELLIDRTTMETHODTYPE=UE_ASSISTED, EMERGLCSSWITCH=OFF,

OPTIONALIESENDSWITCH=R5_POSDATA_SWITCH-0&LAST_KNOWN_SERVICE_AREA_SWITCH-0,

(19)

MML Command for AGPS MR Collection

 Cell:

Set MR collection scope:

SET UMRSCOPE:CELLID = 37851, SCOPETYPE=ByCellId, MRSCOPECTRL=ON;

SET UMRSCOPE:CELLID = 37852, SCOPETYPE=ByCellId, MRSCOPECTRL=ON;

……

If need switch MR collection off, just transfer “MRSCOPECTRL=ON” TO “MRSCOPECTRL=OFF”

ADD USMLCCELL information:

ADD USMLCCELL: RNCID = 2340, CELLID = 48143, CELLLOCCFGTYPE = CELL_ANTENNA, GCDF

= DEG, MTRLGY= MET, ANTENNALATITUDEDEGREE = 29883800, ANTENNALONGITUDEDEGREE

= 121870500, ANTENNAALTITUDEMETER =40, MAXANTENNARANGE=1000,

ANTENNAORIENTATION=2700, ANTENNAOPENING= 1200, CELLIDRTTACTIVATEFLAG =

INACTIVE, OTDOAACTIVATEFLAG = INACTIVE, AGPSACTIVATEFLAG = ACTIVE;

When MR collection finished, we need rollback the switch above.

Accessories for tools of ADD USMLCCELL AND rollback it:

(20)

Impact for Network after AGPS Switch ON

 Impact for SPUa Load

Smart Phone penetration rate SPUa load enhanced

40%

5%

 Impact for Connection Performance

 Impact for Keeping Performance

 Impact for Handover Performance

Command CS RAB Connect

successful rate Call drop rate AGPS report rate AGPS ON 98.10% CS: 0.478% 4.5%~5%

PS: 0.76%

AGPS OFF 99.83% CS: 0.42% —— PS: 0.42%

Note: If need to degrade the impact of

the connect performance further, we can

switch AGPS on in batches.

(21)

Why Impact Network after AGPS Switch ON



When switch AGPS on, RNC will send measurement control including

mass of satellite data to UE.

Sometimes the UE cannot send the response signal to RNC in time, and

then cause the Iu release.



In order to solve this problem, we attempt several methods, One effective

method is to close the GPS_NAVGMODEL in SET USMLC command.

Because it can reduce the num of satellite data from 740 bytes to 130 bytes.



Negative impacts cannot be avoided (just reduced)

To limit the impact, we can switch AGPS in batches.

(22)

 MR based Geolocation Principle Introduction

 MR Basic and Location principle

 Traffic map value

 Coverage Evaluation Introduction

 AGPS MR Collection



Coverage Evaluation based on AGPS MR

(23)

Create Character DB

Prediction

• Dependant on propagation model and engineer

parameters. Accuracy is low.

Use DT to correct prediction DB

• Use DT data to correct the prediction DB, But just

correct the DB on road. Character DB out of road

will depend on prediction.

Based on AGPS

• Use AGPS MR to create character DB, not

dependant on the engineer parameters and

propagation model. Accuracy is highest.

(24)

Network Evaluation based on AGPS MR

Cell List

RSCP

Ec/Io

Pilot pollution

Best Sever

Traffic

LAC distribution

Event distribution

Terminal distribution

Map Analyzer

Overshooting Cell list

Cell list of unreasonable LAC distribution

Cell list of unbalance for UL and DL

Cell list with Fault Antenna

Cell list of unreasonable overlapping zone

Cell list of pilot pollution

(25)

Network Evaluation

RSCP Coverage

For Urban

Ec/Io Coverage

For Urban

We also can display RSCP, Ec/Io for each carrier to find the poor coverage

area on the map.

(26)

Network Evaluation

Pilot Pollution

Best Sever

 From the pilot pollution map, get the more serious pilot pollution area.

 From the Best server map, get the cell coverage range.

(27)

Network Evaluation

AMR Traffic Distribution

PS Traffic Distribution

Use RAB field to distinguish the service type, RAB = 1, means AMR, RAB = 4,

means BE.

From the pictures above, we can find the hotspot and prior to pay attention to the

hotspot, to suggest network capacity expansion.

(28)

Network Evaluation

LAC Distribution

From the LAC distribution and the traffic distribution, we can judge Whether the

LAC boundary is reasonable or not. LAC boundary cannot be divided at the dense

traffic area.

(29)

Network Evaluation

Call Drop Event Distribution

iPhone Hotspot

Associating MR and PCHR logs, we can display the event map, such as call drop

map, HO failure map, etc.

We also can display the coverage map and event map of some type terminals such

as iPhone.

(30)

Network Evaluation - Overshooting



According to the relationship of distance and MRs to judge whether the cell is

overshooting or not.

From the two pictures, we can clearly see the overshooting cells by Best Server

map and MRs PDF.

(31)

Network Evaluation— Faulty Antenna

NodeBID Cellid Faulty specification 3158 31582 1，2，3 sector fault 3158 31583 1，2，3 sector fault 3158 31581 1，2，3 sector fault 3761 37616 2，3 sector fault 3761 37613 2，3 sector fault 3761 37612 2，3 sector fault 3761 37615 2，3 sector fault 3746 37464 1，2 sector fault 3746 37461 1，2 sector fault 3746 37462 1，2 sector fault

Rules:

(1) Choose periodic MRs with AGPS.

(2) Compute the angle of every AGPS MRs to Best Server azimuth

(3) Stat the ratio = the angle > 90 degree/ all periodic MRs

(4) If the ratio >50% and there are above two cells with different azimuth in one

site

(32)

Network Evaluation— Overlapping Zone

Rules:

(1) Choose periodic MRs.

(2) Stat the overlapping zone as couple cells

(3) Compute the ratio = MRs of all Non-Best server and best server are in

active set / all MRs in best server.

Cell1

Cell2

MRs of all cell1

and cell2 in active

set

MRs inCell1

Overlapping

degree1

MRs inCell2

Overlapping

degree2

35351

35353

3960

4082

97.01%

47351

8.36%

37281

37283

1281

1337

95.81%

21195

6.04%

31391

31393

2500

2976

84.01%

78696

3.18%

38781

38783

1952

2574

75.84%

20303

9.61%

40411

40412

10695

14633

73.09%

17296

61.84%

37511

37613

2136

3128

68.29%

23296

9.17%

26961

26962

3270

4820

67.84%

36321

9.00%

37352

37353

14433

22436

64.33%

32855

43.93%

We can use it to check the overlapping zone of the cells , reduce the SHO rate,

and remove the redundant cells.

(33)

Network Evaluation — Pilot Pollution

Pilot pollution subject is included in Nastar V6R9 or above. So we can use

Nastar to analyze pilot pollution.

From the result, we can see the polluted and polluter cell for CS/PS/Total.

Rules:

(1)

Choose periodic MRs.

(2)

Neighbor cells Num > 3 and top 4 cells’ RSCP > -95dBm and Ec/Io < -12dB

(3)

1 st

Cell’s RSCP - 4

th

cell’s RSCP < 5dB

(34)

Network Evaluation— LAC distribution

Rules:

(1) Choose periodic MRs.

(2) Stat the MRs that includes the cells belonging to different lac in active set.

RNCID CellID MRs in different LAC 2354 31642 612 2354 31711 788 2354 31613 847 2354 20833 745 2354 37592 618 2354 31434 408 2354 40793 856 2354 31111 153 2354 37414 1523 2354 31492 111 2354 31046 512 2354 37535 785 2354 37124 1161

The cells with more MRs in different LAC

is belonging to unreasonable LAC

distribution, we should change the cells’

coverage or the cells’ lac ownership.

(35)

 MR based Geolocation Principle Introduction

 MR Basic and Location principle

 Traffic map value

 Coverage Evaluation Introduction

 AGPS MR Collection

 Coverage Evaluation based on AGPS MR

(36)

Case 1 introduction: Weak Coverage Optimization

High traffic(User num)

Few

users

Area

Azimuth from 130 to 170

Bad RSCP

How to improve?

Azimuth from 240 to 200

Point

A

B

C

D

E

Best

RSCP(dBm)

Before

-97.5

-92.5 -107.5 -87.5

-105

After

-91

-92

-102.5

-84

-93

Gain(dB)

6.5

0.5

5

3.5

12 Tuning Summary

(37)

Case 2 introduction: Automatic New Added Site Based on Weak Coverage

 New site address is auto located where RSCP and users distribution meet specified

condition in specified amount of consecutive grids.

Automatic new added site

(38)

Case 3 introduction: Pilot Pollution and Overshooting Problem

Pilot Pollution Analysis Main Serving Pollution Cells Suggestion 13106 21906 Control the coverage of pollution cells 21506 25006 6906

Lon Lat Azimuth RNCID CELLID Overshooting Distance(m)

Overshooting Area(sq.m) 113.6341 34.7821 150 768 21952 117 1666.0309

Pilot Pollution Problem : Serving cell and Polluted cell

(39)

Case 4: Hot Traffic Spot Finding (1/2)

PS Users Num Distribution

PS EcIo Distribution

(40)

Case 4: Hot Traffic Spot Finding (2/2)

Results

Verification

Geography

Magnification

Comparison

Analysis area Human resource(per day)

Time (day)

Hot Spot num

Before

(with traditional way )

**5km*5km**

site num:70

5

7 Unsure

After

(with traffic map)

2

14 Gain

60%

71%

-

Economic

(41)

Case 5 introduction: Real Coverage Distribution (No Location)

(42)

Thank you

www.huawei.com

The information in this document may contain predictive statements including, without limitation, statements

regarding the future financial and operating results, future product portfolio, new technology, etc. There are a

number of factors that could cause actual results and developments to differ materially from those expressed or

implied in the predictive statements. Therefore, such information is provided for reference purpose only and

constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.

(43)

1. Question: current accuracy can not satisfy customer’s requirement. And traffic map don’t support indoor

coverage so far.

Answer: 1) locating accuracy is related with the actual geography environment for example site distance, the

short distance, the higher accuracy. Modify feature database (digital map 5m is best and drive test is needed) can

improve the accuracy. Another way open AGPS report, as long as UE support, the accuracy also can be improved.

2. Question: current traffic map don’t support PS throughput geography display.

Answer: The roadmap for PS throughput display will be in R14 at 2012Q2; So far we can combine user

number/MR number etc conditions to

indirectly recognize.

3. Question: how about the impact for RNC CPU load after open the MR switches.

Answer: In lab test based on Canada traffic model, after open MR switches, the SPU CPU Load will increase

10%

relatively(50%55%). Another side,

MR switches support NodeBs and Cell’ level. It can be opened several

UMTS Introduction of Network Coverage Evaluation Based on MR0309

Security Level:

Introduction of Network Coverage

Evaluation Based on MR

Contents

 MR based Geolocation Principle Introduction



MR Basic and Location principle

 Traffic map value

 Coverage Evaluation Introduction

 AGPS MR Collection

 Coverage Evaluation based on AGPS MR

Security Level:

MR Traffic Map Solution Overview

Geographical visualization of

RSCP，ECIO，UE Power and Cell

Edge based on real user

information

Accurate Coverage Visualization

With configurable thresholds

and parameters, auto identify

spots with poor coverage, pilot

pollution and overshooting

problems

Coverage Problems Auto Identification

New site address is auto located

according to weak coverage spots

and users distribution

Smart Site Planning

Measurement Control

Measurement Report

Measurement Report

Periodic Trigger

(MR Module)

Event Trigger

(HO Module)

MR MAP :

According to corresponding

locating algorithm, make the

information brought by UE

(such as RSCP, Ec/Io, TX

Power and so on) display on

the map.

MR Location Calculation Process

MR Data

Location Calculation

Time

IMSI

RNC

Cell

Longitude

Latitude

Calculated Location

Point

Locating Principle：CELLID+RTT、Feature matching Method、AGPS

1.CellID + RTT

From RTT measurement results,

calculates the distance from the UE

to serving cell, 1 RTT result

determines 1 circle, 3 results

determine 3 circles, and the cross

points of the 3 circles are the real

location.

Signal Features

Moving Unit

2. Feature matching Method

Use the methods of DT,AGPS and

coverage simulation to establish

network feature database, such as

RSCP, Path info, Time Delay etc.

And then compare MR with the

feature database. Ue location is

where the bin match best.

3.AGPS

RNC collect information related

to GPS satellites, and the data

is given to the UE needed for

positioning, UE search to GPS

satellite signals and estimate

location.