1. Sami Ehoniemi sami.ehoniemi@teliasonera.com
Master’s Thesis:
Performance of Multimedia Services in Packet Switched Mobile Networks
Sami Ehoniemi
18 January, 2019

2. Basic Information Title: Supervisor: Instructor: Place of work:
Performance of Multimedia Services in Packet Switched Mobile Networks
Supervisor:
Professor Timo Korhonen
Instructor:
Mika Raitola, M.Sc.
Place of work:
TeliaSonera Finland – Emerging Technologies and Innovations
18 January, 2019

3. Presentation Outline Motivation & Background Objectives & Methodology
Thesis Contents
Measurements
Conclusions
18 January, 2019

4. Motivation & Background
GPRS brought Packet Switched data services to GSM networks
Several new services possible
3G UMTS developing towards an all IP network
IMS platform
Past ARPU from voice calls and SMS
Future growth from value added services incl. multimedia and messaging services
Performance acceptance of multimedia services a major challenge
Operators concerned with the proper functioning of the services and the effective use of the network
18 January, 2019

5. Objectives & Methodology
Objective was to evaluate:
GPRS network possibilities, challenges and problems
Functioning and performance of a couple of services: MMS, Photoshare, IMS PoC, and Fastchat
Effects of the services to the mobile network (GPRS, EDGE)
Methodology:
literary study based on 3GPP, OMA, and MENSA specifications, several books and conference articles
Measurements of several services
18 January, 2019

6. Thesis Contents Introduction Introduction to Mobile Networks
Overview of Messaging Services
Factors Affecting MMS Performance
IP Multimedia Subsystem (IMS)
IMS Case Study: MENSA PoC
Measurements
End-user Performance Analysis
Conclusions
18 January, 2019

7. Measurements (1/2)
MMS performance tests with several GPRS and EDGE terminals
MMS transmission divided into several time periods (GPRS connection delays, UL and DL transmission delay, MMSC delay)
UL and DL transmission rates
MMS roaming tests
IMS Photoshare performance tests with GPRS terminals
Comparison to MMS
Session establishment and image transmission delays
Statistics of HTTP and SIP traffic
18 January, 2019

8. Measurements (2/2) IMS Push-to-talk over Cellular (PoC)
Two test sessions with GPRS and EDGE terminals
Session 1: Understanding of the overall PoC traffic
Session 2: MENSA consortium specified delay values (Session control establishment, floor control, voice transfer)
Fastchat Push-to-talk service
Comparison to MENSA consortium specified PoC
Voice delay values measured
18 January, 2019

9. Conclusions (1/3)
GPRS presents a challenging environment for achieving good application performance
Long and variable network delay
Low and variable network throughput
Difficult for interactive services
EDGE brings capacity and throughput improvements, but not delay improvements
UMTS provides much smaller network latency and improved throughput
18 January, 2019

10. Conclusions (2/3) Main factors affecting the MMS performance:
Terminal Multislot Class (maximum number of simultaneous GPRS or EDGE timeslots), dedicated GPRS capacity
Additional transmission throughput with EDGE
Transport protocol stack (WAP 2.0 better than WAP 1.2.1)
Always GPRS attached mode cut the GPRS connection time
Notification method (SMS notification slow)
Longer GPRS connection and UL transmission delays with a roaming terminal
Measured delays within the proper limits for a non-real-time service
18 January, 2019

11. Conclusions (3/3)
Photoshare an effective way to share media (images, etc.)
Image transmission from terminal to terminal faster than with MMS
High GPRS connection delays of MMS
Long notification delay of MMS
MENSA specified PoC delays achievable (low variance)
SIP signaling compression highly justified
IP/UDP (RFC2507) and RTP/UDP/IP (ROCH RFC3095) header compression methods should be examined
EDGE brings capacity improvement and session control
Need for GPRS QoS with PoC
Fastchat voice delays longer due to long server delay
18 January, 2019

12. Thank You!
18 January, 2019