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GPRS and TCP/IP - Properties and Performance

Linköping 27/11

Price 12 300
Number of days 2

This course will give a thorough understanding of how TCP/IP and GPRS cooperate by illustrating their properties from a performance perspective. In addition, Quality of Service and future improvements of TCP, like snoop, M-TCP and Eifel will be discussed.

TCP has since the beginning of the 1980s been developed to function in many different types of networks with different bandwidth and/ or latency properties, but is now faced with the challenges of working well in wireless networks. As the commercial GPRS networks are becoming operational, the focus is shifted towards performance in practice rather than in theory.

Objectives
You will learn how transfer capacity depends on different properties and mechanisms in TCP/ IP and GPRS and how you can influence the result by choosing different configurations in the system. You will also get a glimpse of the current research front.

Who should attend?
This course is valuable to anyone who works with design, development and optimization of GPRS networks and applications.

Previous knowledge
This course requires basic knowledge of TCP/ IP and good knowledge of GPRS, its nodes and protocols, equivalent to "GPRS - Protocols and Procedures".

Course Material
The course literature is in English and consists of in-house developed course material including a detailed reference list, together with the Douglas E. Comer book "Internetworking with TCP/IP - Principles, Protocols and Architectures".

Course Contents

TCP/IP
-IP and TCP segments and their parameters
-Connection stablish-
ment and the TCP state machine
-Retransmission and  acknowledgements
-RTT-estimates
-Congestion control

ICMP
-What is ICMP?
-Message format
-When is ICMP used?
-How ICMP is used for  path MTU discovery

Application protocols
-Properties of DNS,
 HTTP, FTP, SMTP,
 POP, IMAP and ICQ
-Streaming
 video/audio

Security in TCP/IP
-Denial of service
-IP security

Analyse tools
-tcpdump
-snoop
-ethereal
-tcptrace


Simulation tools
-NIST
-NS-2/NAM
-Demonstrations            

Wireless networks
-Characteristics of a
 wireless network
-How these characteristics
 influence TCP/IP
-How GPRS can influence
 TCP/ IP

GPRS and TCP/IP in co- operation
-Properties of GPRS
 that can influence
 TCP/IP: architecture,
 radio interface and
 protocols
-Properties of SNDCP,
 LLC, RLC/MAC,
 BSSGP,NS
-TCP connection
 establishment over
 GPRS
-Effects of mobility:
 handover and
 routing area update
-Examples from real
 life tests
-Examination of TCP
 logs from a GPRS
 session
-Improvements of
 GPRS
Optimization of TCP/IP
- RFC 2757
- Long Thin Networks
-SACK/D-SACK
-ECN
-Tuning of window size
-Path MTU discovery
-Compression
-Application level proxies

-Demonstrations

Improvements of TCP/IP
-Eifel
-Sharing TCP state
-ACK congestion control
-Splitting TCP (Snoop, M-TCP, I-TCP, W-TCP)
-Transactions, T/TCP


Alternatives to TCP
-Are there any reasonable alternatives?
-WAP
-SCTP


Quality of Service
-QoS in GPRS
-QoS in TCP/IP
-Integrated Services
-Differentiated Services
-Co-operation between IntServ and DiffServ
-Co-operation between GPRS and IntServ/DiffServ
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