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Price is for 4 Days



4 days




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.



GSM and UMTS end2end optimisation knowledge, and TCP/IP protocol opration



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.

LTE Radio Optimisation

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