04 03813

WCDMA RAN P6 Tuning Chapter 4: UE Tuning - Circuit Switched Data

Chapter 4 Objectives After this module, the participants will be able to: 1. Explain the process of UE tuning 2. Define and show different performance indicators using TEMS Investigation 3. Explain accessibility 4. Explain retainability 5. Explain integrity

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -2

UE Tuning- Circuit Switched Data

UE Tuning – Traffic Classes  Conversational – Voice – Video

 Interactive – Web browsing

 Background – FTP – emails

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -3

UE Tuning- Circuit Switched Data

Drive test tools (TIW, UE, Scanner) Configuration Drive Test (one car) for Voice, CS64 & PS call Short call

Long Call

USB1

CS64

USB2

USB1

GPS

GPS

PS

CS64

USB2

USB1

GPS

Com 1

scanner

Special requirements to have the above in one car: 1. Connect power supply directly to car battery (not cigarette lighter) 2. Scanner already has built in GPS but only for WGS84, therefore,external GPS may still be required e.g. for Taiwan maps

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -4

UE Tuning- Circuit Switched Data

TEMS Investigation – Area Binned Statistics

The Binning:

•Area •Time •Distance

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -5

UE Tuning- Circuit Switched Data

Short call example, command sequence

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -6

UE Tuning- Circuit Switched Data

Workflow To get an overview of the clusters performance either the Route Analysis RAN tuning report or the Data collection Report generator can be used 1. Through the charts find the clusters limitations considering Ec and Ec/No levels 2. Through the charts find the blocked and dropped calls

•

ACCESSIBILITY - Analyzing the blocked calls through the Route Analysis and the Data collection part.

•

RETAINABILITY - Analyzing the dropped calls through the Route Analysis and the Data collection part

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -7

UE Tuning- Circuit Switched Data

Route Analysis – The Data selector

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -8

UE Tuning- Circuit Switched Data

TEMS Investigation Report Generator 

Provides Key Performance tables and charts

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -9

UE Tuning- Circuit Switched Data

Accessibility - Blocked Call Classification 

Random Access Failure



RRC Connection Setup not received



RRC Connection Complete not sent



RRC Connection Reject



Measurement Control not received or CM Service Request not sent



Service Request not sent



Call Proceeding not received



Radio Bearer Setup not received



Radio Bearer Setup Complete not sent



Alert or Connect not received



Connect Acknowledge not sent

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -10

UE Tuning- Circuit Switched Data

Support Long Call and Short Call Categorization Configures Short Call MS for Accessibility Statistics e.g. Call Setup & Blocked Call

Configures Long Call MS for Retainability/Mobility Statistics e.g. Dropped Call, Handover

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -11

UE Tuning- Circuit Switched Data

TEMS Investigation Distribution of Access Failures 1.3%

0.6% 1.3% 1.9%

5.2%

13.0%

1.9% 20.8%

53.9% Random Access Failure

RRC Connection Setup not received

RRC Connection Complete not sent

Measurement Control not received

Service Request not sent (Next Event:Registration)

Service Request Reject (Next Event:Registration)

Call Proceeding not received

Radio Bearer Setup not received

Alert or Connect not received

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -12

UE Tuning- Circuit Switched Data

Mobile Originated Call for CS 12.2 kbps Speech Service: Signaling Connection Establishment (1 of 2) RNC RNC

MSC/VLR MSC/VLR

HLR HLR

PRACH: 1st Premable

Random Access Failure

PRACH: Nth Premable AICH response RRC

RRC Connection Request

RRC

RRC Connection Reject

RRC

Radio Link Setup Request

NBAP

RRC NBAP

Radio Link Setup Response

NBAP

Q.2630.1

Establishment Request Establishment Response

Q.2630.1 Q.2630.1

Uplink/Donwlink synchronization RRC Connection Setup L1 Synch on DCH NBAP RRC

RADIO LINK SETUP

NBAP

Q.2630.1

RRC

RRC Connection Reject

AAL2 SETUP

RRC Connection Setup not received

RRC

Radio Link Restore Indication

NBAP

RRC Connection Setup Complete

RRC

RRC Connection Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -13

RRC Connection Setup Complete not sent UE Tuning- Circuit Switched Data

MGw MGw

Uplink/Downlink Imbalance

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -14

UE Tuning- Circuit Switched Data

Mobile Originated Call for CS 12.2 kbps Speech Service: Signaling Connection Establishment (2 of 2)

RRC

RRC

Measurement Control

RRC

Initial Direct Transfer (Service Request)

Initial UE Message RRC

RANAP

RRC

Downlink Direct Transfer Uplink Direct Transfer

RANAP

Service Request not sent

(Service Request) Common ID Direct Transfer

RANAP

SCCP Connect Request

RANAP

SCCP Connect Confirm

RANAP

RRC

DOWNLINK MESSAGE TRANSFER (Authentication Request)

RRC RANAP

MGw MGw

Measurement Control not received

RANAP

RRC

HLR HLR

MSC/VLR MSC/VLR

RNC RNC

Direct Transfer

UPLINK MESSAGE TRANSFER RANAP

(Authentication Response)

Security Mode Command RRC RRC

Security Mode Command Security Mode Complete

RANAP RRC

Figure 4 -15

SECURITY MODE CONTROL

RRC

RANAP

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

RANAP

Security Mode Complete

RANAP

UE Tuning- Circuit Switched Data

Mobile Originated Call for CS 12.2 kbps Speech Service: Establish 12.2 kbps Speech RAB (1 of 3) MSC/VLR MSC/VLR

RNC RNC RRC

RRC

Uplink Direct Transfer

RRC

Downlink Direct Transfer

HLR HLR

MGw MGw

UPLINK MESSAGE TRANSFER

RANAP

Direct Transfer

RANAP

(Setup)

RANAP

Direct Transfer

RANAP

DOWNLINK MESSAGE TRANSFER (Call Proceeding)

RRC

Call proceeding not received

Add T1, AMR

GCP

GCP

Accept T1

GCP

GCP

RAB Assignment Request RANAP

AAL2 SETUP

Q.2630.1 Q.2630.1

IuUP SETUP

IuUP

RANAP

Establishment Request Establishment Response

Initialisation Initialisation Ack

IuUP

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -16

Q.2630.1 Q.2630.1

IuUP IuUP

UE Tuning- Circuit Switched Data

Mobile Originated Call for CS 12.2 kbps Speech Service: Establish 12.2 kbps Speech RAB (2 of 3) RNC RNC

MSC/VLR MSC/VLR

HLR HLR

MGw MGw

Radio Link Reconfiguration Prepare

NBAP

NBAP

Radio Link Reconfiguration Ready NBAP

NBAP

Q.2630.1 Q.2630.1

Establishment Request Q.2630.1 Establishment Confirm

Q.2630.1

Radio Link Reconfiguration Commit NBAP

RRC RRC

RRC RRC

RADIO LINK RECONFIGURATION

NBAP

Radio Bearer Setup Radio Bearer Setup Complete

RADIO BEARER SETUP

Radio bearer setup not received

RRC

Radio Bearer setup complete not sent

RRC

Radio Bearer Reconfiguration Radio Bearer Reconfiguration Complete

RRC RRC

RAB Assignment Response RANAP

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -17

RANAP

UE Tuning- Circuit Switched Data

Mobile Originated Call for CS 12.2 kbps Speech Service: Establish 12.2 kbps Speech RAB (3 of 3)

RANAP RRC

Downlink Direct Transfer

HLR HLR

MSC/VLR MSC/VLR

RNC RNC

Direct Transfer

RANAP

MGw MGw

DOWNLINK MESSAGE TRANSFER (Alert)

RRC

Alert or Connect not received RANAP RRC

Downlink Direct Transfer

Direct Transfer

RANAP

DOWNLINK MESSAGE TRANSFER (Connect)

RRC

Connect Acknowledge not sent RRC

Uplink Direct Transfer

RANAP

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

UPLINK MESSAGE TRANSFER

RRC

Figure 4 -18

Direct Transfer

RANAP

(Connect Acknowledge)

UE Tuning- Circuit Switched Data

Signaling Tab

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -19

UE Tuning- Circuit Switched Data

UE Events Plot in Route Analysis

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -22

UE Tuning- Circuit Switched Data

Handover Statistics

CS Soft Handover Statistics Total Successful Handover Complete Total Successful Handover Performed Total Dropped Calls during Handover Total Handover Failures (including Drop during Handover) Handover Success Rate Total Normal Release

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -25

Addition Removal Replacement Total 562 (52%) 447 (41%) 71 (7%) 1080 (100%) 572 (51%) 475 (42%) 71 (6%) 1118 (100%) 1 (50%) 1 (50%) 0 (0%) 2 (100%) 1 (50%) 1 (50%) 0 (0%) 2 (100%) 100,0% 13 (32%) 26 (63%) 2 (5%) 41 (100%)

UE Tuning- Circuit Switched Data

Distribution of Handover Attempt Failure

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -26

UE Tuning- Circuit Switched Data

Measurement Report

1.

2.

3.

4.

UE sends ‘Measurement Report’ to add/remove cell Network then sends ‘Active Set Update’ to UE to perform Handover Once successful, the UE sends the ‘Active Set Update Complete’ command If there is a change in the neighbor list, the network sends a ‘Measurement Control’ (when a call is setup, the first ‘Measurement Control’ consists of a full Neighbor List, and the network only has to inform the UE if there are changes!!!)

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -27

UE Tuning- Circuit Switched Data

UL: Measurement Report

Tm The timing difference in chips between SC244’s P-SCH and DPDCH channel

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -28

UE Tuning- Circuit Switched Data

DL: Active Set Update Event 1a Generated by UE to add SC244 If Event1b: then remove If Event 1c: then replace If event 1d: then “change of best cell” When the Network Receives the Measurement Report to do a “handover”, the System will active resources and send the Active Set Update message to tell the UE that it now can perform the handover

The network is allowing the UE to remove the SC 35 from the list

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -29

UE Tuning- Circuit Switched Data

Active set update complete and measurement control message UL: ACTIVE SET UPDATE COMPLETE Once UE manages to Sync with the Target Cell – or has it? It sends this message to inform the network of its success.

DL: MEASUREMENT CONTROL This is only SENT by the network IF there is a change to the Monitored Set list. This only provide the ‘Delta’ to the UE I.e. what to add or what to delete for its Monitored SET!!!

© Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -30

UE Tuning- Circuit Switched Data

Downlink Traffic Channel BLER DL Service Integrity

Level 1

Level 2

Level 3

Level 4

No Data

Total

Voice DLBLER average

0,1%

0,1%

0,1%

0,6%

N/A

0,1%

Voice DLBLER 95 percentile

0,0%

0,0%

0,0%

0,7%

0,0%

0,0%

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -31

UE Tuning- Circuit Switched Data

Downlink BLER

BLER BLER%%for forDL DLDPDCH-speech DPDCH-speech

BLER % for DL DPDCH-Signalling BLER % for DL DPDCH-Signalling

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -32

UE Tuning- Circuit Switched Data

Š Ericsson AB 2008 04_03813 LZU 108 6919 Uen Rev. A

Figure 4 -33

UE Tuning- Circuit Switched Data