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GSM RADIO NETWORK TUNING
The TUTORAX (BSC-simulator) is used for the tuning cases, which is provided
in the course material database. Map data for TEMS Investigation and log file are
also provided at the same location. This should be installed on the PCs in the
classroom. Suggestions to solutions for the cases to be find in solutions to
exercises 03815-LZU 108 3298.
The Cell Design Data can be found at http://cpistore.ericsson.se and can be used
as reference data for the tuning cases. It may be a good idea to briefly describe
the organization of this document.
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Preliminary Schedule
Day 1
Introduction and Pre-test
Chapter 1: Managing the Quality of a Radio Network
Chapter 2: Coverage
Chapter 3: Features
Day 2
Chapter 3: Features
Tuning case 1
Chapter 3: Features
Day 3
Tuning case 2
Chapter 3: Features
Tuning case 3
Day 4
Chapter 4: BSC STS User Formulas and Counters
Tuning Case 4
Tuning Case 5
Chapter 5: GPRS/EGPRS Introduction
Day 5
Chapter 6: GPRS/EGPRS Tuning & Optimization
Chapter 7: Tools
Case study TEMS Investigation and/or TEMS Visualization
Post test
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1. Managing the quality of a Radio Network.
1.1 Preparation
Objectives
After this module the course participants are able to:
1.
List different views of quality and which parts
generally are considered
2.
Describe some key performance indicators for
accessibility, retainability and service integrity
Figure 1.1 Objectives
1.1.1 Learning Material
The learning material consists of handouts from the slide show “Managing the
quality of a radio network”.
1.1.2 Learning Methods
This module is given as an instructor-led lecture.
1.1.3 Time Needed
2 hours
1.1.4 Reference Literature
NA
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1.1.5 Necessary Tools
An OH-projector or LCD-projector and a whiteboard with markers in different
colors.
1.2 Module Guide
1.2.1 Managing the quality of a radio network
Give the seminar on “managing the quality of a radio network” – be particular
clear on what parts of the general tuning process that will be covered in the
course.
1.3 Exercise Guide
Exercise 1
1.4 Summary
This chapter is meant as an introduction to the course with the problems and
different aspects that are treated later.
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2. Coverage
2.1 Preparation
Objectives
After this module the course participants are able to:
1.
Understand the design criteria for cell coverage
predictions
2.
Explain how design criteria relates to coverage
predictions
3.
Explain how to make coverage measurements
Figure 2.1 Objectives
2.1.1 Learning Material
The student text consists of the chapter “Coverage” covering this subject
2.1.2 Learning Methods
This module is given as an instructor-led lecture.
2.1.3 Time Needed
1,5 hour
2.1.4 Reference Literature
http://cpistore.ericsson.se/ and the guidelines section
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2.1.5 Necessary Tools
A LCD-projector and a whiteboard with markers in different colors.
2.2 Module Guide
Explain the significance of the design criterion (what is the logical difference
between a design criterion and a signal strength requirement)? How does this
correlate with field measurements? Derive the design criteria for various
environments and try again to explain the log-normal fading margin and why it is
different in a different environment. Explain how to measure coverage with a test
MS.
2.3 Exercise Guide
Exercise 2
2.4 Summary
This module treats the derivation of design criteria and their significance.
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3. Radio Network Features
3.1 Preparation
Objectives
After this module the course participants are able to:
4.
Optimize radio network features by changing
parameters
5.
Perform analysis of statistical data and problems
Figure 3.1 Objectives
3.1.1 Learning Material
The student text consists of the chapter “Radio Network Features” covering this
subject
3.1.2 Learning Methods
This module is given as an instructor-led lecture.
3.1.3 Time Needed
12 to 14 hours (including Tuning Case 1 to 3)
3.1.4 Reference Literature
http://cpistore.ericsson.se/ and the guidelines section
3.1.5 Necessary Tools
An LCD projector with screen and a whiteboard with board markers in different
colors.
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3.2 Module Guide
This chapter is meant as a repetition of the main features and the parameters in
the system. The instructor should briefly explain the different features and
parameters. This must be up to the instructor’s “ear” to feel what features are
particularly interesting for this course.
Point also out that during the course the students will have access to all User
Descriptions of the features. This information could be valuable for solving the
radio tuning cases in the course.
It is not possible, in the limited time available, to discuss all radio network
features in detail. This must be referred to the Radio Network Feature course,
LZU 108 3704.
3.3 Exercise Guide
Exercise 3, 4, 5, 6 and 7
3.4 Case Guide
Tuning Case 1, 2 and 3
There exist three tuning cases described in the case document. To collect cell
parameter for the cases the BSC simulator can be used. The instructor may of
course also use either training BSC or OSS/CNA to collect cell parameters. This
requires that the instructor has defined all necessary data in either the BSC or
OSS/CNA.
During the tuning cases it is recommended to let the students work in groups of
two to four students. Let all groups present their solution on the white board,
discuss the different solutions and then try to agree on the best way of improving
the problem situation described in the case study. A suggestion to solutions to the
cases is to be find in the document 03815-LZU 108 3298.
Before starting each of the tuning cases be sure that you have completed the
teaching of the relevant subjects.
3.5 Summary
This module treats a selection of the radio network features. It can be looked
upon as a summary of the radio network features course. In particular locating is
important to be able to understand parameter discussions that follow.
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4. BSC STS User-formulas and Counters
4.1 Preparation
Objectives
After this module the course participants are able to:
1.
Explain some of the counters that can be retrieved
from STS
2.
Calculate some user formulas for the key
performance indicators
3.
Analyze and evaluate a number of key performance
indicators
Figure 4.1 Objectives
4.1.1 Learning Material
The student text consists of the document “BSC STS User-formulas and
Counters”
4.1.2 Learning Methods
This module is given as an instructor-led seminar
4.1.3 Time Needed
5 hours (including Tuning Cases)
4.1.4 Reference Literature
NA
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4.1.5 Necessary Tools
A LCD Projector with screen and a whiteboard with board markers in different
colors.
4.1.6 Module Guide
This module is concentrated on radio network counters and formulas.
4.1.7 User formulas and counters
The idea is to start with counters. What are counters (software entities belonging
to function blocks), what type of counters exist (event counters, level counters)
and when are they activated? So, you collect data, store in a database, process it
and present it, and although the last two activities are also possible using STS and
measurement programs (OMS), external spreadsheets, such as those in OSS, give
us much more options.
Explain how counters are stored as peg counters and status counters, how they are
collected in object types (show e.g. BSC object types and counters in the object
type CELLTCH), and that you need to employ “user formulas” to get something
useful from them (show e.g. user formulas for average TCH traffic level, TCH
congestion, dropped TCH congestion, and successful handover rate).
4.2 Exercise Guide
4.2.1 Exercise
Exercise 8
4.3 Cases
Case 4
In this case the students will analyze counters data given in the “case_4.xls” data
sheet. For part d) they shall use the BSC Simulator, case 4.
Case 5
In this case the students will analyze counters data given in the “case_5.xls” data
sheet. For part b) they shall use the BSC Simulator, case 5.
4.4 Summary
This module is an introduction to counters, user-formulas and some of their
interpretation.
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5. GPRS/EGPRS Introduction
5.1 Preparation
Objectives
After this module the course participants are able to:
1.
Briefly describe the GPRS/EGPRS network
Figure 5.1 Objectives
5.1.1 Learning Material
The student text consists of the document “GPRS/EGPRS Introduction”
5.1.2 Learning Methods
This module is given as an instructor-led seminar
5.1.3 Time Needed
1 hour
5.1.4 Reference Literature
NA
5.1.5 Necessary Tools
A LCD Projector with screen and a whiteboard with board markers in different
colors.
5.1.6 Module Guide
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This module is meant as a brief introduction to GPRS/EGPRS.
5.2 Exercise Guide
NA
5.3 Summary
NA
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6. GPRS/EGPRS Tuning & Optimization
6.1 Preparation
Objectives
After this module the course participants are able to:
1.
Describe some of the counters retrieved from STS
2.
Describe how to use the counters for optimizing the
GPRS network
3.
Describe how long term dimensioning is done
Figure 6.1 Objectives
6.1.1 Learning Material
The student text consists of the document “GPRS/EGPRSTuning &
Optimization”
6.1.2 Learning Methods
This module is given as an instructor-led lecture
6.1.3 Time Needed
3 hours
6.1.4 Reference Literature
User Description “Radio Network Statistics”
6.1.5 Necessary Tools
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A LCD projector with screen and a whiteboard with board markers in different
colors.
6.2 Module Guide
6.2.1 Introduction
This chapter deals with GPRS/EGPRS performance issues. It is a good idea for
the instructor to be familiar with the User Description Radio Network Statistics
where all formulas and counters can be found that are discussed in this chapter.
Be sure to underline that STS is not the only tool available for tuning activites
related to GPRS/EGPRS.
In slide 55; there is an exercise that asks the students to get the formulas that is
described in the table. Give the students a few minutes to figure out what they are
and then analyse each cell to find out what might be wrong.
6.3 Exercise Guide
Exercise 9
6.4 Summary
This module discusses tuning and optimization of GPRS and EGPRS.
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7. Tools
7.1 Preparation
Objectives
After this module the course participants are able to:
1.
Describe some of the Ericsson tools used for tuning
and optimization
Figure 7.1 Objectives
7.1.1 Learning Material
The student text consists of the document “Tools”
7.1.2 Learning Methods
Instructor-led
7.1.3 Time Needed
2 hour
7.1.4 Reference Literature
NA
7.1.5 Necessary Tools
TEMS Investigation and TEMS Visualization installed on student PCs (if
available) for cases.
7.2 Module Guide
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7.2.1 Introduction
Describe some of the tools available for tuning and optimization. If an OSS
system is available, a live demonstration might be better that using the slides. Try
to explain what the tools can be good for and how different type of problems can
be identified.
7.3 Exercise Guide
N/A
7.4 Case Guide
Case 6 and Case 7
These cases could be done if TEMS Investigation and/or TEMS Visualization are
available.
7.5 Summary
N/A