In-depth Analysis for Troubleshooting and Optimisation of TCP/IP in Mo
The course provides in-depth knowledge of fundamental concepts for IP technology in the Mobile World through theory combined with hands-on lab exercises.
This course describes the TCP/IP architecture and IP-based network (e.g. Internet) with particular focus on their use in mobile networks: The course describes IP transport used in the access networks (UMA/GAN and e UTRAN) as well as the core network in different versions (such as split architecture, IMS and EPC). An overview is provided about protocols and mechanisms used in a TCP/IP network, such DNS, DHCP and RADIUS. The course outlines different aspects of VoIP and multimedia over IP services, with a focus on SIP-based solutions.
LOG-FILE ANANLYSIS AND EXERCISES:
In this course, theory is combined with exercises based on log-file analysis. Some exercises are done by using network monitoring tools such as Wire Shark with various examples of traffic cases collected from live networks. Also the exercises include calculation, observation and validation of key parameters using live network log-files.
Required equipment: Participants are required to have a Windows laptop available. Participants can work in teams of 2 persons and share the laptop to solve the exercises.
Network Overview
• General mobile networks architecture
• Introduction the two major parts of wireless networks: access and core network and their respective functions
• Comparison of PS and CS networks as an explanation of the current trend to switch over to IP-based solutions
Internet Protocol, IP
• IP address structure for IPv4 and IPv6
• IP routing principles and routing tables
• Comparison of IPv4 and IPv6 functionalities
Transport Protocols: TCP, SCTP and UDP
• Functions of transport protocols and usage of port numbers
• Client-server model
• UDP, TCP and SCTP protocols – comparison of their functionalities
Applications
• Functionalities of IP-based applications for remote access handling: DHCP, RADIUS, DNS, NAT
• Services provided by Internet Service Providers with a focus on which of these the mobile operators need to support in their networks
• IP-based application providing user services: email, web browsing, ftp, VoIP, multimedia
Multimedia over IP
• Network architectures to provide real-time multimedia services (including VoIP)
• SIP, SDP, RTP and RTCP protocols – functions and usage that enable end-to-end multimedia sessions
IP in GPRS/UMTS
• Remote access and login procedures for mobile users: PDP Context Activation traffic case
• Modifications of existing IP protocols to adapt to mobile-access users: http*, TCP*
Quality of Service
• Definition of QoS in the context of IP-based networks with mobile access
• QoS provisioning using Intserv, Diffserv and MPLS methods
Network Security
• Security requirements faced by modern telecom networks
• Overview of security algorithms and keys providing encryption and electronic signatures
• IPsec as a method to ensure security for IP networks, with presentation of IPsec elements: Security Association, IKE protocol, Certification Authority
IP transport in wireless-access networks
• Main characteristics and benefits of IP-based access technologies: UTRAN, eUTRAN (LTE), UMA (GAN)
• Evolution and its benefits for IP-based core network technologies: classic GPRS backbone, split architecture, EPC (SAE)
