Price is for 4 Days
 
Duration
4 days
 
 
Objectives
Upon completion of this course, the participant will:
Understand the ICMP Protocols
Explain the operation of IP and TCP protocols
Understand how to troubleshoot TCP performance
Understand the operation of HTTP protocol
Explain presense and messaging services
Understand VoIP services
Understand the protocol mechanism to deliver YouTube streaming services
Develop KQIs to measure YouTube customer experience
Be able to identify end-to-end bottlenecks for YouTube, real-time VoIP, messaging and browsing services: radio, IP-transport and server
 
Suitable for
System engineers, network designers and cell planners involved with LTE end2end
optimisation activities.
 
Prerequisite
GSM and UMTS end2end optimisation knowledge, and TCP/IP protocol opration
 
Content
1. LTE network overview
The end-to-end quality of service (QoS) model specified by 3GPP
Network nodes & Interfaces
 
2. LTE system fundamentals
NAS signalling: Network attach, default bearer setup
QoS parameters
EPS bearers
 
3. ICMP protocol
Protocol Description
Measuring round trip delay
Identifying packet loss within the mobile network
Best practices
 
4. Internet protocol
IP description & header format
Diffserv description
Comparison between LTE end-to-end QoS and Diffserv
 
5. Transport protocols: TCP and UDP
UDP description & header format
TCP description & header format
Important TCP options: Maximum segment size, Selective acknowledgements, window size & scaling
Packet segmentation
TCP slow start, congestion avoidance, fast retransmissions and recovery
TCP retransmissions
Interaction with HARQ retransmission targets
TCP behaviour in mobile networks: packet loss, high delay variation and out-of sequence
Detecting packet loss in LTE transport
TCP throughput optimization
 
5. Web browsing protocols
HTTP protocol description
Browsing statistics: page downloads success & delay, profiling of delay
Tracing and identification of bottlenecks (delay profiling): radio, core, transport and server delay
 
6. YouTube streaming services
TCP/HTTP-based video streaming services
The characteristics of YouTube packet flows (TCP stream) over best-effort LTE/UMTS data connections: ensuring minimum required throughput
Using radio and/or S5/Gn (wireshark) traces to measure YouTube performance
YouTube Key Quality Indicators (KQIs)
Troubleshooting mobile networks for enhanced customer experience
Identifying end-to-end performance bottlenecks: radio, IP-transport and server
 
7. Presence & Messaging Services
Smartphone usage & network performance
Presense
Push e-mail
MMS call flow
SIP—based messaging
 
8. VoIP services
VoIP service implementations
Voice codecs
RTP/UDP/IP protocol overhead and ROHC compression
SIP protocol description
SIP call flow & IMS extensions
VoIP performance over LTE
 
*Several hands-on exercises will be presented covering all discussed course topics.