GSM QOS Parameters in RF Drive Test

1. SERVICEQUALITYMEASUREMENT
&
IMPROVEMENTOF
GSM MOBILENETWORK
INTRODUCTION
RGMTTC Chennai

2. Course Introduction Agenda
 Importance of the course
 Course Aim
 Course Objectives
 Time Table

3. What factors normally influence customer’s
choice/ perception of quality of a GSM
operator ?
 Prices
 Coverage
 Call blocking/dropping
 Speech Quality
 CustomerService
User’s experiencedservicequalityinGSMlinks
directlyto performanceof theradionetwork.
Radio Network
Quality related !
Importance of Service Quality

4. Importance of Service Quality
 Prices – Rock Bottom
 QoS – Service Quality Differentiation from
competitors in terms of
Network availability
Network accessibility
Network retainability
Mobility

5. Importance of Customer Satisfaction
Customer perception - main criterion - to assess and
measure the true value of the quality
“7 0 % o f custo m e rs dissatisfie d with a se rvice willg o
e lse whe re , but o nly 5% will te llthat the y are unhappy… . .
Dissatisfie d custo m e rs te llan ave rag e o f m o re than te n
pe o ple abo ut the ir po o r e xpe rie nce s while satisfie d
custo m e r willte llo nly five . ”
(Source: Quality of Service in Telecommunications by A.P. Oodan, K.E. Ward and A.W.
Mullee)

6.  There is a direct relationship between
Customer Satisfaction and the Quality of
Service.
Network
Performanc
e
Network
Performanc
e
Customer
satisfaction
Customer
satisfaction
direct impact
Importance of Service Quality

7. The Network Performance is the ability of a network
or network portion to provide the functions related to
communications between users.
NetworkPerformance
definition

8. Optimization Targets
Effective &
Economic
use of
Network
Effective &
Economic
use of
Network
Satisfied Customers
MaximumUtilisation
of Resources

9. Saving Effort
on Network
Optimisation
Saving Effort
on Network
Optimisation

10. Increased
Customer
Complaints
Saving Effort
on Network
Optimisation
Saving Effort
on Network
Optimisation

11. Increased
CustomerComplaints
Increased
Workload
Increased
WorkloadSaving Efforton NetworkOptimisation
Saving Efforton NetworkOptimisation

12. Marketing
becomes
Inefficient
Marketing
becomes
Inefficient
Increased
Customer
Complaints
Increased
Workload
Increased
Workload
Saving Effort
on Network
Optimisation
Saving Effort
on Network
Optimisation

13. What is the solution ?

14. NetworkOptimization Process
Customer
Feedbacks
Benchmarking
Field
measurements &
Performance
Evaluation
Operation &
Maintenance
Measurements
INPUTS
POST
PROCESSING
NETWORK
PLANNING
MANAGEMENT
MARKETING
Continuous
Process
Continuous
Process

15.  What is Optimization ?
 Activity of achieving and maintaining the
required quality as designed
 Why Optimization ?
 Deviations between plan and reality

16. OptimizationPhases
•Site Audit
•Proper Parameters use
•Verify Neighbors list
•Reviewing Frequency Plan
•Analysis & Identification of
Problem areas/cells by drive test
statistics, customer complaints
•Prioritization of problems
•Identify Solution and Implement
•Retest the problem areas
•Consistency Check of the OMC
database
•Fine-tuning of parameters
•On going process, weekly
optimization

17.  Inaccuracy of radio planning
◦ Finite Terrain Database resolution, Approximation of
Path Loss
 Implementation Discrepancies.
◦ Results from Propagation models may vary from
Field result.
 Environmental Changes
◦ New Buildings, New Highways, Trees etc
 Ageing
◦ Reduction in Power, Cable loss
 Interference Issues and Unpredicted Noise Floor.
◦ Over-shooting, Reflection ,Inter-technology Carriers.

18. Increasing Network Quality.
Deals with Speech and Data Quality (i.e.. RXQual,
BLER ) to increase customer satisfaction.
Increasing Network Availability.
Deals with call performances, i.e. DCR, HFR.
Increasing Network Capacity.
Deals with capacity management efficiently.
INCREASED REVENUE !
An o ptim ize d ne two rk pe rfo rm s be tte r and subscribe rs no tice the
diffe re nce . So yo u can achie ve hig he r custo m e r satisfactio n by re ducing
the num be r o f dro ppe d calls, the re by re ducing churn and incre asing
custo m e r lo yalty.
OBJECTIVES OF OPTIMIZATION

19. Course Aim
The course aims at providing knowledge and skills to the
participants to carry out the measurement of Service
Quality of GSM Mobile Network and to analyse the
results and improve the GSM Mobile network

20. Objectives of the Course
O n co m ple tio n o f the co urse , the participants willbe
able to
 Explain RF signal Transmission and Reception
 Analyse OMCR reports
 Measure and improve the Key Performance Indicators in RF
network
 Carry out the Drive test through software tools in use in
respective zonal network of GSM viz. AGILENT and measure
signal coverage and quality.
 Carry out the post processing of the Drive test files
 Carry out Optimization of the RF network
 Carry out the Benchmarking

21. Time Table : Day 1

22. Time Table : Day 2

23. Time Table : Day 3