BSS B11 Optimization and Frequency Planning With RMS

BSS B11 Optimization and Frequency Planning using RMS - Page 1All Rights Reserved Alcatel-Lucent 2010

All Rights Reserved Alcatel-Lucent 2010

BSS B11BSS B11 Optimization and

Frequency Planning using RMS

STUDENT GUIDE

TMO18110 D0 SG DEN I1.0 Issue 1.0

All rights reserved Alcatel-Lucent 2010 Passing on and copying of this document, use and communication of its

contents not permitted without written authorization from Alcatel-Lucent



BSS B11 Optimization and Frequency Planning using RMSBSS B11

2

Empty page

Switch to notes view!

This page is left blank intentionally




3

Terms of Use and Legal Notices

Switch to notes view!1. Safety WarningBoth lethal and dangerous voltages may be present within the products used herein. The user is strongly advised not to

wear conductive jewelry while working on the products. Always observe all safety precautions and do not work on the

equipment alone.

The equipment used during this course may be electrostatic sensitive. Please observe correct anti-static precautions.

2. Trade Marks

Alcatel-Lucent and MainStreet are trademarks of Alcatel-Lucent.

All other trademarks, service marks and logos (Marks) are the property of their respective holders, including Alcatel-

Lucent. Users are not permitted to use these Marks without the prior consent of Alcatel-Lucent or such third party owning

the Mark. The absence of a Mark identifier is not a representation that a particular product or service name is not a Mark.

Alcatel-Lucent assumes no responsibility for the accuracy of the information presented herein, which may be subject to

change without notice.

3. Copyright

This document contains information that is proprietary to Alcatel-Lucent and may be used for training purposes only. No

other use or transmission of all or any part of this document is permitted without Alcatel-Lucents written permission, and

must include all copyright and other proprietary notices. No other use or transmission of all or any part of its contents may

be used, copied, disclosed or conveyed to any party in any manner whatsoever without prior written permission from

Alcatel-Lucent.

Use or transmission of all or any part of this document in violation of any applicable legislation is hereby expressly

prohibited.

User obtains no rights in the information or in any product, process, technology or trademark which it includes or

describes, and is expressly prohibited from modifying the information or creating derivative works without the express

written consent of Alcatel-Lucent.

All rights reserved Alcatel-Lucent 2010

4. Disclaimer

In no event will Alcatel-Lucent be liable for any direct, indirect, special, incidental or consequential damages, including

lost profits, lost business or lost data, resulting from the use of or reliance upon the information, whether or not Alcatel-

Lucent has been advised of the possibility of such damages.

Mention of non-Alcatel-Lucent products or services is for information purposes only and constitutes neither an

endorsement, nor a recommendation.

This course is intended to train the student about the overall look, feel, and use of Alcatel-Lucent products. The

information contained herein is representational only. In the interest of file size, simplicity, and compatibility and, in some

cases, due to contractual limitations, certain compromises have been made and therefore some features are not entirely

accurate.

Please refer to technical practices supplied by Alcatel-Lucent for current information concerning Alcatel-Lucent equipment

and its operation, or contact your nearest Alcatel-Lucent representative for more information.

The Alcatel-Lucent products described or used herein are presented for demonstration and training purposes only. Alcatel-

Lucent disclaims any warranties in connection with the products as used and described in the courses or the related

documentation, whether express, implied, or statutory. Alcatel-Lucent specifically disclaims all implied warranties,

including warranties of merchantability, non-infringement and fitness for a particular purpose, or arising from a course of

dealing, usage or trade practice.

Alcatel-Lucent is not responsible for any failures caused by: server errors, misdirected or redirected transmissions, failed

internet connections, interruptions, any computer virus or any other technical defect, whether human or technical in

nature

5. Governing Law

The products, documentation and information contained herein, as well as these Terms of Use and Legal Notices are

governed by the laws of France, excluding its conflict of law rules. If any provision of these Terms of Use and Legal

Notices, or the application thereof to any person or circumstances, is held invalid for any reason, unenforceable including,

but not limited to, the warranty disclaimers and liability limitations, then such provision shall be deemed superseded by a

valid, enforceable provision that matches, as closely as possible, the original provision, and the other provisions of these

Terms of Use and Legal Notices shall remain in full force and effect.




4

Blank Page






5

Course Outline

About This CourseCourse outline

Technical support

Course objectives

1. Topic/Section is Positioned HereXxx

Xxx

Xxx

2. Topic/Section is Positioned Here






1. Optimization & FP using RMS

1. Radio Measurements Overview 3JK12103AAAAWBZZA

2. RMS Feature Description 3JK12104AAAAWBZZA

3. Radio measurements statistics Data 3JK12105AAAAWBZZA

4. RMS Based Radio Network Optimization 3JK12106AAAAWBZZA

5. RMS Based AFP 3JK12107AAAAWBZZA

6. Annex 3JK12108AAAAWBZZA




6

Course Outline [cont.]






7

Course Objectives


Welcome to BSS B11 Optimization and Frequency Planning using RMS

Upon completion of this course, you should be able to:

By the end of the course, the trainee will be able to:

Describe the Radio Measurements Statistics (RMS) feature

Activate the RMS job and tune RMS templates

Interpret RMS counters And through relevant case studies

Use RMS data for Optimization

Use RMS data for Frequency planning




8

Course Objectives [cont.]






9

About this Student Guide

Switch to notes view!Conventions used in this guide

Where you can get further information

If you want further information you can refer to the following:

Technical Practices for the specific product

Technical support page on the Alcatel website: http://www.alcatel-lucent.com

Note

Provides you with additional information about the topic being discussed.

Although this information is not required knowledge, you might find it useful

or interesting.

Technical Reference (1) 24.348.98 Points you to the exact section of Alcatel-Lucent Technical

Practices where you can find more information on the topic being discussed.

WarningAlerts you to instances where non-compliance could result in equipment

damage or personal injury.




10

About this Student Guide [cont.]






11

Self-assessment of Objectives

At the end of each section you will be asked to fill this questionnaire

Please, return this sheet to the trainer at the end of the training


Instructional objectives Yes (or globally yes)

No (or globally no)

Comments

1 To be able to XXX

2

Contract number :

Course title :

Client (Company, Center) :

Language : Dates from : to :

Number of trainees : Location :

Surname, First name :

Did you meet the following objectives ?

Tick the corresponding box

Please, return this sheet to the trainer at the end of the training




12

Self-assessment of Objectives [cont.]


Instructional objectives Yes (or Globally yes)

No (or globally no)

Comments

Thank you for your answers to this questionnaire

Other comments

Section 1 Module 1 Page 1

All Rights Reserved 2007, Alcatel-Lucent

3JK12103AAAAWBZZA Edition 1

Do not delete this graphic elements in here:


BSS B11 BSS B11 Optimization and Frequency Planning using RMS

11 Module 1Radio Measurements Overview3JK12103AAAAWBZZA Edition 1Section 1

Optimization & FP using RMS





BSS B11

BSS B11 Optimization and Frequency Planning using

RMS

Optimization & FP using RMS Radio Measurements Overview 1 1 2

Blank Page


First editionLast name, first nameYYYY-MM-DD01

RemarksAuthorDateEdition

Document History





BSS B11


RMS


Objectives

To be able to describe radio measurments





BSS B11


RMS


Objectives [cont.]






BSS B11


RMS


Table of Contents

Switch to notes view!Page

1 Introduction 72 Radio Link Measurements 93 Radio Measurements Statistics 204 Electro-Magnetic Environment (EME) statistics 275 CCCH load measurements 29





BSS B11


RMS


Table of Contents [cont.]







BSS B11


RMS


1 Introduction





BSS B11


RMS


1 Introduction

Radio Measurements

The Radio Link Measurements:

Performed in the BTS on a per channel basis, and used in the BTS and BSC by Telecom functions.

The Radio Measurements Statistics (RMS):

Performed in the BTS on a per TRX basis, and aggregated at cell level in

the BSC. Those statistics are controlled by Performance Management functions, and used for operation purposes.

Electro-Magnetic Environment (EME) measurements

CCCH Load Measurements





BSS B11


RMS


2 Radio Link Measurements





BSS B11


RMS



Principle

The radio measurements are performed in the BTS on a per channelbasis. The following channels are concerned :

bi-directional active traffic channels and dedicated control channels,

idle traffic channels,

random access channel (RACH).

For active channels, the radio measurements consist in : The carrying out of the uplink measurements,

The collection of the downlink measurements,

The computation of the Timing Advance (TA) command to be applied by the MS

For idle channels, the radio measurements consist in the measurement of the received interference level.

For RACH, the radio measurements consist in measuring the load of the channel.





BSS B11


RMS



RLM Metrics

The basic radio link metrics are :

The signal strength

The signal quality

The MS-BS absolute distance

The signal strength:

The received signal level is denoted as RXLEV by 3GPP

The BTS must measure the RMS signal level at the receiver input over the full range of -110 dBm to -48 dBm

The reported value shall be the average of the received signal level

Measurement samples in dBm taken within the reporting period of length one SACCH multiframe. The actual averaging performed by the BTS is done with linear values





BSS B11


RMS



RXLEV

RXLEV is used for active channels as an input parameter by the power control and handover preparation functions

For idle channels, RXLEV gives an estimation of the interference level on the channel

The received signal level shall be mapped to an RXLEV value between 0 and 63:

RXLEV RMS received signal level

RXLEV Assumed values of signal level

0 < -110 dBm 0 -110 dBm

1 -110 dBm to -109 dBm 1 -109 dBm

2 -109 dBm to -108 dBm 2 -108 dBm

: : : : :

62 -49 dBm to -48 dBm 62 -48 dBm

63 > -48 dBm 63 -47 dBm

3GPP TS 45.008 definition Values assumed by the power control and handover algorithms in the ALCATEL BSS.





BSS B11


RMS



RXQUAL

The signal quality is denoted as RXQUAL by 3GPP

RXQUAL is used for active channels as a criterion by the power control and handover preparation functions

By definition, there is no RXQUAL estimation for idle channels.

The received signal quality shall be measured by the BTS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe.

The reported parameter (RXQUAL) shall be the received signal quality averaged over the reporting period of length one SACCH multiframe

The BTS estimated quality value is divided into eight quality bands.





BSS B11


RMS



RXQUAL [cont.]

The mapping of the equivalent BER before channel decoding on thequality bands:

RXQUAL BER before channel decoding Assumed value of BER

0 less than 0.2% 0.14%

1 0.2% to 0.4% 0.28%

2 0.4% to 0.8% 0.57%

3 0.8% to 1.6% 1.13%

4 1.6% to 3.2% 2.26%

5 3.2% to 6.4% 4.53%

6 6.4% to 12.8% 9.05%

7 greater than 12.8% 18.10%





BSS B11


RMS



Timing Advance

The absolute MS-BS distance is estimated by measuring the Time of Arrival (TOA) of the received burst at the BTS for each allocated timeslot (activated channel/subchannel) or for RACH.

The absolute MS-BS distance is evaluated by the BTS to calculate the TA command to be applied by the MS for adaptive time alignment purposes with the BTS

The value is expressed by a number of bit periods on the Radio interface. The bit rate on the Radio interface is 270.8 kbit/s therefore a bit period lasts 3.69 *s which corresponds to a distance of 1.1 km.

But due to the roundtrip delay between MS and BS, a bit period corresponds to a MS-BS distance of (1.1/2) km i.e. around 550 m.





BSS B11


RMS



Reporting periods

The statistical values of signal level and quality are obtained over a measurement period. This period is also called "reporting period".

For a TCH, the reporting period of length 104 TDMA frames (480 ms) is defined in terms of TDMA frame numbers (FN) as shown in table Table:





BSS B11


RMS



SACCH Multiframe

FACCHFast Associated

Control Channel

TCH cycle stealing peak 11.4 kb/s or 22.8kb/s

On-demand signalling- Call Setup, Call Release, HO Command, DTM procedures





BSS B11


RMS



Measurements Reports

Radio Measurement Reporting : For each MS connected to the BTS (TCH or SDCCH)

The UL received level and quality are measured every SACCH

The Timing advance (TA) is computed

The UL information is gathered into a measurement report

this is the message result sent by the BTS to the BSC

DL measurements UL+DL measurements

MeasurementReport

MeasurementResult

MS BTS BSC





BSS B11


RMS



Measurements Results

Measurement Result message:

L1 info: SACCH Layer 1 header containing:

MS_TXPWR_CONF and TOA.

L3 info: MEASUREMENT REPORT from the MS:

This message contains the downlink measurements

and neighboring cell measurements.

Uplink measurements performed by the BTS.

SACCH BFI

BTS power level used.





BSS B11


RMS


3 Radio Measurements Statistics





BSS B11


RMS



Principle

Radio Measurements Statistics are compound statistics based on available radio link measurements for Circuit Switched TCH calls, either performed by the BTS or reported by the MS

No RMS measurements are performed for SDCCH calls.

TCHs allocated to (E)GPRS traffic are not concerned by RMS.

These measurements are controlled by the Performance Management function





BSS B11


RMS



RMS Entities

BTS RMS entity: This is the entity responsible for the RMS function in a TRX. It is controlled by the BSC RMS entity through the Abis RMS protocol.

BSC RMS entity: This is the BSC entity responsible for the control of the BTS TRX RMS function. There is one BSC RMS entity per TRX.





BSS B11


RMS



RMS Data

General information :

These are general information to allow PM to make efficient use of the following statistics.

C/I vector :

This C / I ratio gives a representation of the difference of receive level on the downlink between the serving cell and the neighbor cell.

RXQUAL_UL / RXLEV_UL matrix :

This 2-dimension matrix gives for each entry defined by (RXLEV uplink in a given band, RXQUAL uplink in a given band),

the total number of reports,

an average of the corresponding MS power level,

an average of the corresponding MS Timing Advance.





BSS B11


RMS



RMS Data [cont.]

RXQUAL_DL / RXLEV_DL matrix :

Same matrix but for the downlink.

BFI / RXLEV_UL matrix :

This 2-dimension matrix gives for each entry defined by

(RXLEV uplink in a given band , Number of consecutive BFI in a given band):

the total number of reports.

Radio link Counter (S) vector :

This vector gives for each entry defined by Radio link Counter (S) in a given interval:the total number of reports.

Path balance vector :

This vector gives for each entry defined by (path balance in a given interval): the total number of reports.





BSS B11


RMS



RMS Data [cont.]

Voice quality statistics :

A set of counters is defined to represent the distribution of quality for speech calls, based on measurements of RXQUAL & RXLEV on the uplink and downlink, the FER on the uplink.

AMR measurements:

A set of counters is defined feature to allow monitoring the usage of each allowed AMR codecs (FR or HR), compared to the link level, in order to help the operator tuning the AMR parameters.

Timing Advance (TA) statistics:

The aim of this feature is to provide statistics information on timing advance, in order to understand geographical traffic distribution in a cell, to identify resurgences and hot spots





BSS B11


RMS



Mobile Assisted Frequency Allocation:MAFA

This RMS sub-feature allows the RMS function to gather C/I information (see above) for specific frequencies declared by the operator (called EMO-frequencies).

This typically allows to monitor specific propagation conditions to optimize frequency plan

If allowed by configuration , the BSS sends the Extended Measurement Order (EMO) to the MS on SACCH with the list of EMO-frequencies to be reported,

the MS supporting the MAFA feature answers with a single Extended Measurement Report.





BSS B11


RMS


4 Electro-Magnetic Environment (EME) statistics





BSS B11


RMS


4 Electro-Magnetic Environment (EME) statistics

Principle

The EME feature performs the assessment of the average power emitted at the BTS antenna output connector over time. Power data is provided per cell and per frequency band.

This feature provides: Power evolution over time for each cell (per band),

Warning report on the delta power between the emitted power and a predefined threshold,

Statistics and tendencies on the emitted power for each cell (per band).

EME measurement statistics are permanently handled by EVOLIUM BTS/TRE on any downlink channel.

Once started, TRE collects permanently power data. At the end of each measurement period, triggered by reception of EME_DATA_REQ, TRE finalizes EME statistics and generates 2 new counters: Statistics on emitted absolute power on the GSM band (850MHz and 900MHz)

Statistics on emitted absolute power on the DCS band (1800MHz and 1900MHz)





BSS B11


RMS


5 CCCH load measurements





BSS B11


RMS


5 CCCH load measurements

Principle

The CCCH load measurements feature performs the assessment of load on CCCH channels.

This feature provides:

Number of blocks sent on AGCH and PCH,

Number of busy RACH slots,

Number of received channel requests

Statistics about IMMEDIATE ASSIGNMENT and pagings received from BSC

CCCH load measurements are permanently handled by EVOLIUM BTS/TRE on any CCCH channel.

Once started, TRE collects permanently power data. At the end of each measurement period, triggered by reception of CCCH LOAD REQUEST,TRE finalizes CCCH load measurements and generates 8 new counters:see comments pages





BSS B11


RMS


End of ModuleRadio Measurements Overview


All Rights Reserved 2007, Alcatel-Lucent-Lucent



All Rights Reserved Alcatel-Lucent-Lucent 2007


12 Module 2RMS Feature Description3JK12104AAAAWBZZA Edition 1Section 1





All Rights Reserved Alcatel-Lucent-

Lucent 2007

BSS B11


RMS

Optimization & FP using RMS RMS Feature Description 1 2 2

Blank Page




Document History





Lucent 2007

BSS B11


RMS


Objectives

To be able to describe the Radio Measurements Statistic mechanism and activate the RMS job





Lucent 2007

BSS B11


RMS


Objectives [cont.]






Lucent 2007

BSS B11


RMS


Table of Contents


1 Introduction 72 How Does it work? 113 RMS Job Activation 144 RMS Message Flow Scenario 195 MAFA 23





Lucent 2007

BSS B11


RMS









Lucent 2007

BSS B11


RMS


1 Introduction





Lucent 2007

BSS B11


RMS


1 Introduction

Objectives

Radio Measurements Statistics (RMS) is a feature introduced since B7 BSS software release

Designed to make far easier the work for planning and optimisation of a network

Allowing to constantly check pure network QoS and optimize various network parameters:

Provides useful statistics on reported radio measurements

Based on real field measurements and not in predictions

Users mobiles and BTSs are acting as measurement equipments

RMS are performed by mobiles and BTSs and made available at the OMC-R through the usual PM application.





Lucent 2007

BSS B11


RMS


1 Introduction

Objectives [cont.]

Using RMS, the operator is able to :

Detect interfered frequencies and interferes

Assess quality of the cell coverage

Assess radio link quality

Evaluate the voice quality

Assess the traffic distribution from statistics

On reported neighbour cells

Based in Timing advance statistics

Monitor AMR codec use to evaluate AMR operation and the quality of radio coverage in a cell





Lucent 2007

BSS B11


RMS


1 Introduction

RMS results usage

Optimize the neighborhood and frequency planning

Detection of the origin of a bad QoS in order to optimize consequently the network parameters.

RNP

Benefit to whole NPO

Compute

Interference

Matrix

OMCR

BSC

RMS Templates

MAFA tuning

BTS

RMS Binary Files

NPO





Lucent 2007

BSS B11


RMS


2 How Does it work?





Lucent 2007

BSS B11


RMS


2 How Does it work?

Principle

Radio Measurement Statistics are performed by mobiles and BTSs on TCH channels

The BTS format those requested statistics and stores all the results

SF15SF16SF17SF18SF19SF20SF21SF22

SpeechFrame

MR

BTS

Voice:

Measurement Report (MR)

Call quality statistics

Radio quality statistics

C/I statistics

6 strongestneighboring cells

Serving cell

Serving cell





Lucent 2007

BSS B11


RMS


2 How Does it work?

Principle [cont.]

At the end of observation period, BTS builds a report and sends it to BSC

BSC forwards the measurement to the OMC-R thought PM application

RMS results can be exported from OMC-R to a post-processing tool

RMS results are retrieved once per job





Lucent 2007

BSS B11


RMS


3 RMS Job Activation





Lucent 2007

BSS B11


RMS



Activations methods

RMS Job can be activated from OMC-R via two methods:

Permanent Measurement Campaign

On demand measurement campaign

Activating RMS wont overload the network

Most of the work is done in the BTS

1 job per day

RMS can be activated permanently on all the cells of the network

This has been done on several main Alcatel-Lucent networks

Frequently asked question:

Will activating RMS overload the network?

No, activating RMS wont overload the network since most of the work is done in the BTS.

That's why RMS can be activated permanently on all the cells of the network, this has been done on several

main Alcatel-Lucent networks.





Lucent 2007

BSS B11


RMS



Permanent Measurement Campaign

Permanently through the PM type 31

Provide start & stop time

RMS job is launched automatically

every day

between the same hours

on all the cells of the OMC-R





Lucent 2007

BSS B11


RMS





Provide start & stop time

Provide BSS identity & object list

Accumulation period

Must be restarted after the RMS stop

time, so as to get new RMS data.

On demand RMS job is launched only

once





Lucent 2007

BSS B11


RMS



How to Do It

PMC activation through UFM

ODMC activation through BSSUSM

Check Campaigns are unlocked and enabled





Lucent 2007

BSS B11


RMS


4 RMS Message Flow Scenario





Lucent 2007

BSS B11


RMS



RMS protocol

The BSC initiates the RMS job for the concerned TRX.

The BTS starts the measurements job for all new TCH calls, based on:

BTS uplink measurements,

MS downlink measurement reports.

MS downlink Extended Measurements Report (EMR)

MS BTS BSC

START_RMS_REQ

Start of RMS Job

START_RMS_REP





Lucent 2007

BSS B11


RMS



RMS protocol [cont.]

The BSC stops the RMS job,

The BTS stops the RMS measurements, finishes compiling the statistics, and prepares the measurement report for upload.

MS BTS BSC

STOP_RMS_REQ

Finalise RMS stats

Prepare upload

STOP_RMS_REP





Lucent 2007

BSS B11


RMS



RMS protocol [cont.]

The BSC asks for the current RMS results by sending the RMS_DATA_REQ message.

The BTS transfers the RMS measurements, segmented in blocksThe BTS uses timer T_RMS_BTS to interleave the reported data at regular interval, in order to avoid LAPD overload.

The BTS notifies that the RMS transfer has finished by sending the RMS_DATA_REP (success) message.

MS BTS BSC

RMS_DATA_REQ start T_RMS_BTS

RMS_DATA_IND (Block 1)T_RMS_BTS expiry

restart T_RMS_BTS

RMS_DATA_IND

(last Block)T_RMS_BTS expiry

restart T_RMS_BTS

RMS_DATA_REP(success)stop T_RMS_BTS





Lucent 2007

BSS B11


RMS


5 MAFA





Lucent 2007

BSS B11


RMS


5 MAFA

Principle

Provides a way for the system to ask each MS to measure extra-frequencies (frequencies of non-neighbour cells)

MAFA can be used to check interferences from non-neighbour cells and help the operator find "clean" frequencies

Frequencies will be reported even if they are received with a lower level than the BCCH frequency of neighbour cells

It is a standardized GSM feature

Mobile dependent feature.

MAFA is totally included in the RMS feature,

Nevertheless, some specific actions are required at the OMC-R and BSC side in order to launch the MAFA procedure

6 strongestneighboring cellsServing

cell

EMO-frequencies





Lucent 2007

BSS B11


RMS


5 MAFA

How does it work?

Inside a RMS job is possible to apply the Mobile Assisted Frequency Allocation (MAFA) or Extended Measurement Reporting:

Consists in sending an Extended Measurement Order (EMO) to the mobiles

Mobile takes one SACCH multiframe to perform measurements on specific frequencies

These measurements are reported via the EXTENDED_MEASUREMENT_REPORT message

The EMO is only sent once per call.

The statistics related to MAFA will be collected in the BTS and integrated in the RMS results





Lucent 2007

BSS B11


RMS


5 MAFA

How does it work?

MS BSC MSC

< -----------------------------------ASSIGNMENT REQUEST< --------------------------------------------------------

PHYSICAL CONTEXT REQUEST-------------------------------------------------------- >

PHYSICAL CONTEXT CONFIRM

< --------------------------------------------------------CHANNEL ACTIVATION (TCH)

(EMO included)-------------------------------------------------------- >CHANNEL ACTIVATION ACKNOWLEDGE

.

.

TCH establishment.--------TCH---------> .

ASSIGNT COMPLETE ------------------------------------------------------- >ASSIGNMENT COMPLETE ----------------------------------- >

EMR(MAFA freq. RxLev)

TCH ASSIGNMENT PHASE (OC or TC)BTS





Lucent 2007

BSS B11


RMS


5 MAFA

Activation

MAFA job is included in the RMS job MAFA job that allows measurements of specific frequencies by MAFA mobiles during the RMS job

Two aspects on MAFA job definition: The activation of the MAFA feature, that can be done through the flag EN_EXT_MEAS_REP

The definition of the frequencies to be monitored by the MAFA mobiles (called MAFA frequencies)

The definition of the MAFA frequencies and EN_EXT_MEAS_REP flag can be performed thought NPO also





Lucent 2007

BSS B11


RMS


5 MAFA

How to Do It

Using OMCR: PRC





Lucent 2007

BSS B11


RMS


5 MAFA

How to Do It

Using NPO tuning session: MAFA Tuning





Lucent 2007

BSS B11


RMS


End of ModuleRMS Feature Description







13 Module 3Radio measurements statistics Data3JK12105AAAAWBZZA Edition 1Section 1






BSS B11


RMS

Optimization & FP using RMS Radio measurements statistics Data 1 3 2

Blank Page




Document History





BSS B11


RMS


Objectives

To be able to describe RMS data





BSS B11


RMS


Objectives [cont.]






BSS B11


RMS


Table of Contents


1 General information 7TRX based information 8

2 The neighbor cells statistics 10Name of No Level 11Name of No Level 12CI-vector based on Normal Measurement Report 13CI-vector based on EMR 17Example 18Exercise 19

3 Radio Quality related statistics 20The RXQUAL_UL/RXLEV_UL matrix 21The RXQUAL_DL/RXLEV_DL matrix 24Example 27BFI/RXLEV_UL Matrix 28Example 32Radio link Counter (S) vector 33Example 35Path Balance vector 36Example 38Exercise 39

4 Voice Quality Statistics 40Name of No Level 41Computation of Voice Quality statistics 42VQ RMS Counters 49Example 57

5 AMR Statistics 58Measurement of AMR codec usage 59AMR FR UL BFI vector 61AMR HR UL BFI vector 62Example 63AMR FR XL usage/XL_RXLEV matrix 64AMR HR XL usage/XL_RXLEV matrix 65Example 66Exercise 67

6 TA Statistics 68Name of No Level 69Timing advance distribution 70Average RXLEV per TA band counters 71Average RXQUAL per TA band counters 72Example 73End of Module 74





BSS B11


RMS








BSS B11


RMS


1 General information





BSS B11


RMS



TRX based information

The TRX based information indicators:

Indicate whether the report does not include all the reported neighbor

cells(overflow, see note below).

Indicate whether a TRX overload occurred.

Indicate whether a partial restart (C/I only) of the RMS job on the TRX occurred.

RNO RMS Indicators:

- RMS_info_CI_overload_indication:

Flag indicating that the upper limit of 42 C/I vectors is exceeded during RMS job duration. In this case,

new C/I vectors are not taken into account

The list of frequencies to be monitored by the mobile is limited to 33 but due to resurgence the same

frequency can be reported several times (each time with a different BSIC). If the number of reported

cells is above the dimensioning limit (maximum 42 CI-vectors are reported), the extra new reported

frequencies are not taken into account anymore. In the result report the related overflow indicator is

set accordingly.

- RMS_info_overload_indication:

Indication whether a TRX overload occurred during RMS job duration. In this case, the measurements

data collection is interrupted until the overload situation disappears. RMS statistics are thus based on

partial measurements collection

-RMS_info_Partial_Restart_indication:

Bit map indicating that the measurements (for and only for CI vector computation) on either Neighbour

cells or on MAFA frequencies or on both or none were restarted during RMS job duration.

The bitmap is represented as follows :

0 : no CI partial resul





BSS B11


RMS



TRX based information [cont.]

Total number of MEASUREMENT RESULTS messages used for statistics

Total number of EXTENDED_MEASUREMENT_REPORT messages, used for (C/I) statistics

RMS_Extended_Meas_Report_total:

Total number of extended measurements (through MAFA) during the RMS statistics retrieval





BSS B11


RMS


2 The neighbor cells statistics





BSS B11


RMS



CI-Vector

The RMS function builds C/I statistics based on measurement reports gathered:

for regular neighbour cells from MS MEASUREMENT REPORT,

and for EMO-frequencies from MS EXTENDED MEASUREMENT REPORT.

SC

MC A

MC B

MC C

MC D

MC E

MC F

C

I





BSS B11


RMS



CI-Vector [cont.]

Declared/reported neighbor cell:

For each declared/reported neighbor cell:

The Neighbor cell identity

CI-vector.

The identification of the Neighbor cell shall be done using:

BCCH_ARFCN and BSIC.

EMO-frequency:

For each reported EMO-frequency:

The frequency_id

CI-vector.

The identification of these frequencies shall be done using:

Frequency ARFCN.

- The BCCH ARFCN is deduced in the BTS from the BCCH frequency index and the list of indexed

frequencies (sent by the BSC at the beginning of the RMS job).

- In case of a frequency reported via Extended Measurement Reporting, no BSIC is required : the

frequency ARFCN is not directly linked to a BCCH frequency. The ARFCN value of the frequency is

deduced in the BTS from the place of the measurement in the EXTENDED_ MEASUREMENT_REPORT and

from the ordered list of the EMO-frequencies. This list is built by the OMCR and passed via BSC to BTS

at the beginning of the RMS job.

- The CI-vector shall be provided for each requested (by operator) frequency in context of Extended

Measurement Reporting. The maximum number of frequencies in the order (EMO) is the maximum

defined in 3GPP (=21). Hence the maximum in the report is 21 also. When in exceptional cases, more

results are available (future expansion in 3GPP), only the first 21 are reported.





BSS B11


RMS



CI-vector based on Normal Measurement Report

This vector gathers measurements related to regular neighbor cells

For each neighbor cell, it gives the total number of measurement reports in which the C/I related to the neighbor cell is reported in C/I band X (as described next slides)

C/I is expressed in dB and it is computed as follows : If EN_BALANCED_CI = TRUEthen :C/I (dB) = RXLEV_DL + abs(BS_TXPWR - BS_TXPWR_MAX) -

RXLEV_NCELL else :C/I (dB) = RXLEV_DL (dBm) - RXLEV_NCELL (dBm)

- The difference of (BS_TXPWR - BS_TXPWR_MAX) has been introduced in order to compensate the

differences of the power transmission levels due to the DL power control.

- The expression (RXLEV_DL + abs(BS_TXPWR - BS_TXPWR_MAX)) can be seen as a kind of normalized

received power level in case the BTS would always have used the maximum allowed power level.

- Note that the formula is written independently of the coding used for the variables.

- RXLEV_DL and RXLEV_NCELL are the received signal levels of the serving and of the neighbor cells,

expressed in dBm.

- BS_TXPWR is the BTS transmitted power

- and BS_TXPWR_MAX is the maximum allowed BTS transmission power.

- Both are defined relatively to the maximum absolute output power of the BTS

(BTS_MAX_OUTPUT_POWER).

- BS_TXPWR and BS_TXPWR_MAX are expressed in dB.

- The function abs() gives the absolute value of its argument.





BSS B11


RMS



CI-vector based on Normal Measurement Report [cont.]

The difference of (BS_TXPWR - BS_TXPWR_MAX) has been introduced in order to compensate the differences of the power transmission levels due to the DL power control

BTS Power (dBm)

BTS_MAX_OUTPUT_POWER BS_TXPWR_MAX (dB)

BS_TX

PWR

(dB)

BS_power_level (real transmission power level)

RXLEV_DL (dBm) (real received power level)

BS_TXPWR - BS_TXPWR_MAX

Path loss DL

- The difference of (BS_TXPWR - BS_TXPWR_MAX) has been introduced in order to compensate the

differences of the power transmission levels due to the DL power control.

- The expression (RXLEV_DL + abs(BS_TXPWR - BS_TXPWR_MAX)) can be seen as a kind of normalized

received power level in case the BTS would always have used the maximum allowed power level.

- Note that the formula is written independently of the coding used for the variables.

- RXLEV_DL and RXLEV_NCELL are the received signal levels of the serving and of the neighbor cells,

expressed in dBm.

- BS_TXPWR is the BTS transmitted power

- and BS_TXPWR_MAX is the maximum allowed BTS transmission power.

- Both are defined relatively to the maximum absolute output power of the BTS

(BTS_MAX_OUTPUT_POWER).

- BS_TXPWR and BS_TXPWR_MAX are expressed in dB.

- The function abs() gives the absolute value of its argument.

- Note:

From B9, the variable BTS_MAX_OUTPUT_POWER (used for the power control and the path balance

statistics) should be reported as a new RMS counter.





BSS B11


RMS




There are 10 C/I bands which are defined through 9 thresholds parameters, tuneable on a per RMS template basis:

C1,C10: Indicate the number of measurement reports received for the corresponding band

C3C2C1 C10 Max

-63 dB MEAS_STAT_C/I_3 MEAS_STAT_C/I_663 dB

Vector Maximum

C/I

C/I band 1 is defined by : -63 dB





BSS B11


RMS


Memory limitations have led to the use of 10 slots, or buckets that gather the data.

The bucket width and position can be adjusted by tweaking the 9 internal boundaries in each cell (the extreme boundaries are fixed).

This template adjustment can be easily done in RNO.

The number of drops in each bucket is also an approximation and is only one byte (0..255) which is then multiplied by a factor (the MAX_SAMPLE value)

-63dB 63dBMEAS_STAT_C/I_5

C1 C2 C3 C4 C5 C6 C7 C8 C9 C10



To save on the memory resources, these counters are in a coded format.

The used coding mechanism is the following:

The counters in the table (C1,C10) are one-byte percentage-counters. In fact the counters indicate

the fraction of the row-maximum. (see Max).

At coding time the coded values (the fraction) are determined as follows:

Ci = Vi x 254 / row_maximum

Notes:

Vi represents the real number of measurements

the value Ci=0 indicates number_of_meas = 0

the value Ci=254(0FE) indicates number_of_meas = row_max

the value Ci=255(0FF) is reserved to indicate overflow

At decoding time the real values are determined as follows:

Vi = Ci x row_maximum / 254

Max: The maximum number of measurement reports received.

Max = max of (V1,V2,V10)





BSS B11


RMS


RMS 9a:

Same format as regular neighbor cells based vector

The EMO based CI-vector is identified by the ARFCN only.


CI-vector based on EMR





BSS B11


RMS



Example

C/I band 1 is defined by : -63 dB





BSS B11


RMS



Exercise

Compute the C/I for the case hereafter:

EN_BALANCED_CI = TRUE

BS_TXPWR_MAX = - 2 dB

BS_TXPWR = - 6 dB

RXLEV_DL = - 84 dBm

RXLEV_NCELL = - 102 dBm

C/I (dB) = (RXLEV_DL + abs(BS_TXPWR - BS_TXPWR_MAX) - RXLEV_NCELL)

= ((-84dBm + abs(-6dB - (-2dB))) - (-102dBm)= (-84dBm + 4dB) + 102dBm= -80dB + 102dBm= 22dB





BSS B11


RMS


3 Radio Quality related statistics





BSS B11


RMS



The RXQUAL_UL/RXLEV_UL matrix

One Matrix of total number of reports in which:

the uplink RXQUAL is reported in quality band X

and the uplink RXLEV is reported in level band Y.

For each total number of reports, the corresponding averaged value of MS power level and Timing Advance are given

TA

C

PWR

Quality

Level





BSS B11


RMS



The RXQUAL_UL/RXLEV_UL matrix [cont.]

RMS3a: Consist..

C80PWR80TA80

Max10

TA1

Max1

1 2 3 4 5 6 7

-

- 110 dBm

RXLEV_UL

RXQUAL_UL

- 47 dBm0

MEAS_STAT_LEV_3

C1

MEAS_STAT_LEV_4

PWR1C2PWR2TA2

C3PWR3TA3

This counter RMS3a=TPR_RXQUAL_UL_RXLEV_UL is a matrix

represented on the left side

This counter RMS3b=TMR_RXQUAL_UL_RXLEV_UL is a vector

represented on the right side

The real number of Measurement Results in which UL RxQual is equal to i and UL RxLev is in RXLEV band

j, is equal to :

S(RXQUAL i, RXLEV band j) x Max j / 254

TPR_RXQUAL_UL_RXLEV_UL(i,j) x TMR_RXQUAL_UL_RXLEV_UL(j) / 254





BSS B11


RMS



The RXQUAL_UL/RXLEV_UL matrix [cont.]

There are 10 levels bands which are defined through 9 thresholdsparameters tuneable on a per RMS template basis:

MEAS_STAT_LEV1 to MEAS_STAT_LEV9: -110 MEAS_STAT_LEV(i+1) MEAS_STAT_LEV(i) < -47 dBm

RXQUAL bands are fixed and they correspond to the possible values of the RXQUAL measurement : 0 to 7

0 being the best quality value and 7 the worst one

The matrix gathers following different information :

C1,C80: Indicate the number of measurement reports received for the corresponding row and column

PWR1PWR80: Averaged value of MS_TXPWR in dBm for that total number of reports

TA1TA80: Averaged value of Timing Advance for that total number of reports

There are 10 levels bands which are defined through 9 thresholds parameters, tuneable on a per RMS

template basis, as follows :

Level band 1 is defined by : -47 dBm >= RXLEV >

MEAS_STAT_LEV_1

Level band 2 is defined by : MEAS_STAT_LEV_1 >= RXLEV > MEAS_STAT_LEV_2


:

Level band 10 is defined by : MEAS_STAT_LEV_9 >= RXLEV >= -110 dBm

C1,C80: Indicate the number of measurement reports received for the corresponding row and

column. To save on the memory resources, these counters are in a coded format. The used coding

mechanism is as described in the CI-vector section.

Max1,Max10: The maximum number of measurement reports received for the

corresponding ROW.

Max_1 = max of (V1,V2,V8)


:

Max_10 = max of (V72,V73,V80)

In order to provide correct averages, the TRE cumulates the MS_TXPWR and timing advance. Therefore during measurement the TRE requires a 4 byte-storage for every counter. At the end of the observation, before passing it to the BSC, the TRE determines the average value (with one decimal) and coded it into a one_byte_average value.





BSS B11


RMS



The RXQUAL_DL/RXLEV_DL matrix

Matrix of total number of reports in which: the downlink RXQUAL is reported in quality band X

the downlink RXLEV is reported in level band Y

For each total number of reports, the corresponding averaged value of:

BS power level

and Timing Advance are given





BSS B11


RMS



The RXQUAL_DL/RXLEV_DL matrix [cont.]

RMS4a:Row

Maximum

C80PWR80TA80

Max10

TA1

Max1

1 2 3 4 5 6 7

-

- 110 dBm

RXLEV_DL

RXQUAL_DL

- 47 dBm0

MEAS_STAT_LEV_3

C1

MEAS_STAT_LEV_4

PWR1C2PWR2TA2

C3PWR3TA3

There are 10 levels bands which are defined through 9 thresholds parameters, tuneable on a per RMS

template basis, as follows :

Level band 1 is defined by : -47 dBm >= RXLEV >

MEAS_STAT_LEV_1



:

Level band 10 is defined by : MEAS_STAT_LEV_9 >= RXLEV >= -110 dBm

C1,C80: Indicate the number of measurement reports received for the corresponding row and

column. To save on the memory resources, these counters are in a coded format. The used coding

mechanism is as described in the CI-vector section.

Max1,Max10: The maximum number of measurement reports received for the

corresponding ROW.



:

Max_10 = max of (V72,V73,V80)





BSS B11


RMS



The RXQUAL_DL/RXLEV_DL matrix [cont.]

Level bands are defined as previously

RXQUAL bands are fixed and they correspond to the possible values of the RXQUAL measurement : 0 to 7

The matrix gathers following different information :

C1,C80: Indicate the number of measurement reports received for the corresponding row and column

PWR1PWR80: Averaged value of the BS power level in dBm for that total number of reports, i.e. the corresponding averaged value of

[BTS_MAX_OUTPUT_POWER - abs(BS_TXPWR)], TA1TA80: Averaged value of Timing Advance for that total number of

reports

BS_TXPWR is the BTS transmitted power defined relatively to the maximum absolute output power of the BTS.

BS_TXPWR is expressed in dB, whereas BTS_MAX_OUTPUT_POWER is expressed in dBm. The function abs( ) gives the absolute value of its argument

Remark: In order to provide correct averages, the TRE cumulates the BS_TXPWR and timing advance. Therefore during measurement the TRE requires a 4 byte-storage for every counter. At the end of the observation, before passing it to the BSC, the TRE determines the average value (with one decimal) and coded it into a 1-byte_average value.





BSS B11


RMS



Example





BSS B11


RMS



BFI/RXLEV_UL Matrix

Matrix of total number of reports in which:

the number of consecutive BFI (Bad Frame Indication) is in BFI band X the uplink RXLEV is reported in level band Y

The number of consecutive BFI is computed over one SACCH multiframe The BTS increments the BFI (or CFE) counter as soon as consecutive speech frames cannot be decoded (next slide)

Consecutive Frame Erasure (CFE):

MEAS_STAT_BFIi parameters define 9 intervals of cumulated numbers of consecutive

speech frames which have a Bad Frame Indicator value set to 1 (it means that the

speech frame is considered as erroneous by the BTS).

As the TC will erase speech frames for which a Bad Frame Indicator flag (BFI) has

been set to the value 1 by the BTS, a BFI is used in the RMS counters description

whereas the CFE is used in the RMS indicators defined in the RNO tool.

Note: By default, a BFI relates to a speech frame. When considering SACCH

measurement, SACCH_BFI should be used.





BSS B11


RMS



BFI/RXLEV_UL Matrix [cont.]

Consecutive Frame Erasure:

The BTS increments the BFI (or CFE) counter as soon as consecutive speech frames cannot be decoded:

isolated speech frames with BFIs set to 1 are not counted

sequences of not decoded speech frames are cumulated

SF

01

SF

02

SF

03

SF

04

SF

05

SF

06

SF

07

SF

08

SF

09

SF

10

SF

11

SF

12

SF

13

SF

14

SF

15

SF

16

SF

17

SF

18

SF

19

SF

20

SF

21

SF

22

SF

23

SF

24

SACCH

FRAME

BFI

0

BFI

0

BFI

0

BFI

1

BFI

0

BFI

0

BFI

0

BFI

1

BFI

1

BFI

1

BFI

1

BFI

0

BFI

0

BFI

1

BFI

1

BFI

0

BFI

1

BFI

1

BFI

1

BFI

0

BFI

1

BFI

0

BFI

1

BFI

0

BFI

1

CFE

0

CFE

0

CFE

0

CFE

0

CFE

0

CFE

0

CFE

0

CFE

0

CFE

2

CFE

3

CFE

3

CFE

3

CFE

3

CFE

4

CFE

4

CFE

4

CFE

6

CFE

6

CFE

6

CFE

6

CFE

6

CFE

7

CFE

7

CFE

1

CFE

5

SACCH Multiframe

The number of consecutive BFI is computed over one SACCH multiframe in the following way :

In the period of the SACCH multiframe, a counter counts the number of speech frames which are

consecutive and with BFI = 1 (it means that the speech frame is counted if its BFI = 1 and the previous

frame has also BFI = 1). The counter must hold concurrently several periods of consecutive bad speech

frames within the SACCH multiframe.

Consecutive Frame Erasure (CFE):

MEAS_STAT_BFIi parameters define 9 intervals of cumulated numbers of consecutive speech frames

which have a Bad Frame Indicator value set to 1 (it means that the speech frame is considered as

erroneous by the BTS).

As the TC will erase speech frames for which a Bad Frame Indicator flag (BFI) has been set to the

value 1 by the BTS, a BFI is used in the RMS counters description whereas the CFE is used in the RMS

indicators defined in the RNO tool.

Note: By default, a BFI relates to a speech frame. When considering SACCH measurement,

SACCH_BFI should be used.

If during this SACCH multiframe, DTX is applied on the uplink path (DTX_UL =1), the counter on consecutive BFI shall be ignored and the corresponding report shall not be taken into account in the statistics. Otherwise, the counter of consecutive BFI is computed over 25 frames (the 24 speech frames and the SACCH frame).





BSS B11


RMS




The matrix consists in BFI bands on X axis and level bands on Y axisRow

Maximum

Max10

Max1

MEAS_STAT_BFI_3

-

- 110 dBm

RXLEV_UL

CONSECUTIVE BFI COUNTER

- 47 dBm

MEAS_STAT_LEV_3

MEAS_STAT_LEV_4

C2

MEAS_STAT_BFI_4

C1 C3

C100

Level bands are defined as previously.





BSS B11


RMS




Level bands are defined as previously

There are 10 BFI bands which are defined through 9 thresholds parameters, tuneable on a per RMS template basis:

MEAS_STAT_BFI1 to MEAS_STAT_BFI9:0 < MEAS_STAT_BFI(i) MEAS_STAT_BFI(i+1) 25 speech frame

C1,C100: Indicate the number of measurement reports received for the corresponding row and column.

BFI band 1 is defined by :0





BSS B11


RMS



Example





BSS B11


RMS



Radio link Counter (S) vector

vector of total number of measurement reports for which the value of S (Radio link counter) is in S band X

C3C2C1 C10 Max

0 MEAS_STAT_S_3 MEAS_STAT_S_6 128Vector Maximum

Radio Link Counter S

To save on the memory resources, these counters are in a coded format. The used coding mechanism is

as described in the CI-vector section

The real number of Measurement Results in which Uplink Radio Link Counter is in S band j, is equal to:

S(S band j) x Max / 254

TPR_RADIO_LINK(j) x MAX_RADIO_LINK / 254

Recall on the Uplink Radio Link Supervision procedure:

For each active dedicated radio channel in a cell, a counter S called Radio Link Counter is:

decremented by 1 by the BTS each time an SACCH measurement from the mobile cannot be

decoded (SACCH_BFI=1).

incremented by 2 by the BTS each time a valid SACCH measurement is received from the mobile

(SACCH_BFI=0).

Initial value of S = RADIOLINK_TIMEOUT_BS (cell parameter)

if S reaches N_BSTXPWR_M, a radio link recovery is triggered (BTS and MS power increased at their

maximum).

if S reaches 0, a Radio Link Failure is triggered (channel drop).

Therefore the value of S gives a measure of the quality of the radio uplink.

RADIOLINK_TIMEOUT_BS: Counter threshold to detect a radio link failure on the uplink path.

Min value : 1

Max value: 128 Samfr

Default value: 18 Samfr





BSS B11


RMS



Radio link Counter (S) vector [cont.]

There are 10 S bands which are defined through 9 thresholds parameters, tuneable on a per RMS template basis:

MEAS_STAT_S1 to MEAS_STAT_S9: 0 < MEAS_STAT_S(i) MEAS_STAT_S(i+1) 128 SACCH mfr

C1,C10: Indicate the number of measurement reports received for the corresponding column

S band 1 is defined by : 0





BSS B11


RMS



Example

S: counter managed by the BTS on a per call basis

S = RADIOLINK_TIMEOUT_BS if good radio conditions

S decr

Documents

BSS B11 Optimization and Frequency Planning With RMS