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.