(ComTec) 1st Lecture - Universität Kassel

ITC1 - WS05/06
Prof. Dr. Klaus David
Chair for Communication Technologies
(ComTec)
1st Lecture: 2.11.05
1st lecture ITC1 Introduction 2.11.05 kd v05.ppt
Chair for Communication Technology (ComTec), Faculty of Electrical Engineering / Computer Science
Introduction of Team
•
•
•
•
Frank Salzmann
Tino Löffler
Alexander Bolz
Klaus David
© ComTec 2005
Overview
• ComTec (Chair for Communication
Technology) in a Nutshell
• Organisational of Lecture
• Overview of Lecture
• Motivation and Introduction of Subject
© ComTec 2005
Overview
• ComTec (Chair for Communication
Technology) in a Nutshell
• Organisational of Lecture
• Overview of Lecture
• Motivation and Introduction of Subject
© ComTec 2005
Mission Statement
• Excellence in education
– Balanced offer of basics and up-to date
contents backed-up by strong research effort
• Excellence in research
– Building on the team spirit and enthusiasm of
our co-workers and with our industrial
partners
• Further perspectives in innovation
– technical training, consulting, start-ups
© ComTec 2005
ComTec as of 29.02.00
© ComTec 2005
Lectures including Lab Training
• “Introduction to Communication”
• “Communication Technologies”
– Each: part 1/ part 2, 4 SWS ≅ 6 CPs
• Contents:
– Protocols, LANs
– Mobile Networks and Applications
• UMTS/WLAN, Bluetooth/ GSM/GPRS/WAP, MMS,
Middleware, distributed systems, pervasive
computing, …
– IP Technologies and Applications
• IP, IPv6, Mobile IP, TCP, UDP, HTTP, DNS, Security,
email, VoIP, SIP, …
© ComTec 2005
© ComTec 2005
Lectures with Industry
• Condat:
– Summer School „M - Business“
– Technical Training: GSM Signalling
– Technical Training: GPRS, UMTS
• CISCO: CCNA started, CCNP planned
• T – Mobile
– Technical Training W-LAN
– Technical Training UMTS
© ComTec 2005
Lehrstuhl ComTec
• Seit 5 Jahren existent
– rund 20 Mitarbeiter und aktuell
rund 30 Studierende/ Jahr
– rund 1 Mio. EUR Drittmittel/ Jahr
• State-of the art infrastructure
– Router lab, Teleteaching lab, Mobile multimedia lab in
prep., workstation/PCs, Metaframe, OPNET
• mehre Industrieprojekte
in strategischen
Schwerpunkten
• Strategische Sponsoren:
– CISCO, Opnet,
T-Mobile seit 1.1.03
© ComTec 2005
© ComTec 2005
© ComTec 2005
Key R&D Areas
• Networking:
– Co-operation with CISCO (Wineglass finished, others)
– IPonAir ALCATEL/bmb+f
• Applications:
– Condat
– bmb+f WI Microsoft, Siemens, Philips, Telekom, …
• MIK21
– IST mCDN Siemens, Fokus, Intracom, …
– IST MobiLife Nokia, Ericsson, …
• Teaching:
– E-Learning bmb+f TU-Berlin, TU-Dresden, BTU
– Notebook University (bmb+f, Uni - Kassel)
– CISCO CCNA/CCNP
© ComTec 2005
Further Activities
• active Participation in WWRF
– WG2 Services and Platforms
– Editor of white papers on
• Personalisation
• enabling technologies
• Co - Editor Book of Vision 2004
© ComTec 2005
Future Vision: All IP
• Some Challenges:
– QoS (EU Project WINEGLASS)
– Mobile IP (with modifications, EU Project
BRAIN)
© ComTec 2005
Multi Standard Environment
UMTS
WLAN
BS
GSM
?
BS
?
AP
?
MS
BS
AP
MS
Base Station
Access Point
Mobile Station
© ComTec 2005
Impact of max. TX Power
Im pact of m ax. Transm ission Pow er
1400.0
Max. distance [m]
1200.0
1000.0
800.0
600.0
400.0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
No. of users
Pmax = 10 W att
Pmax = 20 W att
Pmax = 40 W att
© ComTec 2005
Expected benefits - one-hop scenario
Coverage
extension
Base
station
Base
station
Load balancing
Capacity
increase
Coverage
extension
Ad-hoc link
Cellular link
© ComTec 2005
Pervasive
Computing
• Pervasive
= Ubiquitous
+ Mobile as a strategy
© ComTec 2005
Structuring the PerComp
environment
•
Applications take
advantage of a platform
following the model
•
Service layer contains
application supporting
services
– Separated into local and
distributed services
– Services may change
their classification
Classification of services and
management in pervasive computing
into a three layered model.
•
Management layer deals
with service management
aspects
© ComTec 2005
Service layers
Applications
The Wireless Internet Community
platform
Service
Browser
Download
Manager
Download
Service
Community
Manager
Management
Service
Discovery
Profiling
Chat
RMI Server
Service
Core
Java Runtime Environment
Solid lines show the use of services. Dashed lines show helper services for communication.
© ComTec 2005
<id>
<id> <id: information>
© ComTec 2005
Demonstration (2 Devices / Users)
Service
App App
Service
Service
© ComTec 2005
Scenario: Challenge with small
screen
© ComTec 2005
Service
Discovery of
resources like
full screen
© ComTec 2005
Profile/ Policy:
If (alone ) redirect
© ComTec 2005
mik21: Systemdenken und
Szenarien
Das System-Design fokussiert sich auf Nutzerwertund Akzeptanzforschung im Rahmen von
Nutzerwert
interdisziplinär entwickelten Anwendungsszenarien:
ƒ Innovationshöhe
ƒ Bedürfniskriterien
ƒ Nachhaltigkeit
Akzeptanz
ƒ Mind-Ergonomie
ƒ Usability-Aspekte
ƒ Kontextfaktoren
Zukunftsrahmen:
2010
2020
Die entwickelten Anwendungen
werden im Rahmen eines
gesamtsystemischen Vorgehens in einen Szenariokanal für 2010 und
2020 eingebettet.
© ComTec 2005
Conclusion
• Leading industrial projects in strategic
areas granted
• Attractive teaching program started
• State-of the art infrastructure
– Router lab, Tele-teaching lab, Mobile
multimedia lab in prep., workstation/PCs,
Metaframe, OPNET
© ComTec 2005
Angebote der Zusammenarbeit
• Absolventen/ Praktika
• Weiterbildung
• Regelmäßige Interne Treffen
• Herausfordernde:
–
–
–
–
Projekte
Seminarvorträge
HiWI ..
in relevanten, industriellen Projekten
© ComTec 2005
Organisational
• Parts of the lecture sponsored by:
© ComTec 2005
Alumni Treffen am 4.11.2005
© ComTec 2005
Organisational of Lecture
• Introduction to Communication (ITC1) ehemals: Übertragungstechnik 1, auch:
Netze, Netzwerke in „Informatik“
• Compulsory Lecture in Computer
Science (3. Semester)
• Compulsory Lecture in
„Nachrichtentechnik“ (5. Semester)
• Optional Lecture in: E-Technik, Master
ECE, Wirtschaftsingenieur
© ComTec 2005
Organisational of Lecture
• Lecture consists of 4 parts:
–
–
–
–
the lecture 2 SWS
exercises 1 SWS
practical training 1 – 2 SWS with test
overall Test (written, dates: )
– for Computer Science: All 4 compulsory (4
SWS)
– for „Nachrichtentechnik“ all but practical
training (3 SWS)
© ComTec 2005
Organisational of Lecture
• On offer:
– Seminar presentations
– Studien-/Diplomarbeiten, Master thesis,
Project work
– “Studentische Hilfskräfte”, 3 out of Semester
already hired
– support for practical training (including
“BPS”) and jobs in industry for those
students having convinced in ComTec
© ComTec 2005
Organisational of Lecture:
Exercises
• Overall co-ordination:
– Mr. Alexander Bolz
• Exercise itself:
– presented by Tino Löffler and Alexander Bolz
• Time for exercises:
– Mondays, 10 - 12, first date announced on
webpage
© ComTec 2005
Organisational of Lecture
• Registration needed
• All material for Lectures on the Platform
available.
• Only for students taking part in the
lecture
• Scripts wanted?
© ComTec 2005
Mailingliste
• Anmeldung über die Website
• Alle wichtigen Informationen rund um die
Vorlesung und Übung werden über diese
Mailingliste verteilt.
© ComTec 2005
Downloads
• Download-Bereich ist geschützt
• Zugangsdaten zum Download-Bereich
werden nach erfolgreicher Anmeldung
zur Mailingliste als Welcome-Nachricht
verschickt
• Zugangsdaten werden ausschliesslich
über die Mailingliste bekannt gegeben !
© ComTec 2005
Organisational of Lecture
• Tips:
– best preparation for Test:
• understand content of lecture
• actively participate in exercises
• If questions: Exercise or office hours - this
guarantees excellent access and therefor no
additional dates
© ComTec 2005
Organisational of Lecture
• Feedback from Students:
– Highly welcome to further develop the lecture
– 2 Rounds of feedback
© ComTec 2005
Practical Training: Motivation
• Overall co-ordination:
– Mr. Alexander Bolz
• One labor for each of our four lectures
(ITC-I, ITC-II, CT-I and CT-II)
• Each labor consists of
– Preparation at home
– Labor practice in our lab
– An exam
© ComTec 2005
Labor Exercices ITC-I
• Installation of Win NT/2000 on a
computer, including network
• Installation of linux on a computer,
including network
• Configure some network services on
linux like email, ftp, http and nfs
• Connect some computers with different
types of cables (Coaxial, Twisted Pair,
Fiber)
• Static and dynamic routing
© ComTec 2005
Labor Exercices ITC-I
The labor exercises are offered as a block
course. The exercises are in groups of 3
students. There will be a list on our
webside for registration. After the
exercises, the students have to write an
elaboration and there also will be an oral
test.
© ComTec 2005
Literature
• [Kurose 2001] J. Kurose, „Computer
Networking: A Top-Down Approach
Featuring the Internet“, Addison Wesley,
2001
• [Tanenbaum 1996] Andrew S.
Tanenbaum, „Computer Networks“,
Prentice - Hall, 3rd edition, 1996
• http://www.prenhall.com/tanenbaum/
• [Stallings 1998] William Stallings, „HighSpeed Networks: TCP/IP and ATM Design
Principles“, Prentice-Hall, 1998
© ComTec 2005
Literature
• More than 100 other good books, many
good web sides
• Find out for yourself - books and style of
learning
• proposal: 2 responsible for literature/link
file
© ComTec 2005
Overview
• ComTec (Chair for Communication
Technology) in a Nutshell
• Organisational of Lecture
• Overview of Lecture
• Motivation and Introduction of Subject
© ComTec 2005
Overview of Lecture
• OSI Reference model
• Layer 1: Physical layer
– Passive components
– Active components
•
•
•
•
•
•
Layer 2: Data link layer / MAC layer
Layer 3: Network layer
Layer 4: Transport layer
Layer 5: Session layer
Layer 6: Presentation layer
Layer 7: Application layer
© ComTec 2005
Overview of Lecture
• In other words:
– LAN technologies
– Internet - networking and applications
– the seven OSI layers and their functions
© ComTec 2005
Overview of Lecture
© ComTec 2005
Overview
• ComTec (Chair for Communication
Technology) in a Nutshell
• Organisational of Lecture
• Overview of Lecture
• Motivation and Introduction of Subject
© ComTec 2005
Types of Networks
• Basically several basic types of networks
exist like?
© ComTec 2005
Types of Networks
• Basically several basic types of networks
exist like?
– Broadcast Networks (Radio, Television,
Paging, ...)
– Point - to - Point
• PSTN (Public Switched Telephone Network)
• Computer/ Data Networks - Internet
• Mobile Networks
© ComTec 2005
Types of Networks
© ComTec 2005
Types of Networks
• Scale of Networks:
– Intra-/ Interprocessor
– BUS Systems
– LAN (Local Area Networks)
– WAN (Wide Area Networks)
© ComTec 2005
Communication is more than
Networks
• It is about?
© ComTec 2005
Communication is more than
Networks
• It is about?
– exchange of information
• speech
• data
• multimedia
© ComTec 2005
Motivation for
Networking/Communication
• Evolution of Networks CISCO, Semester
1, 1.4.2
© ComTec 2005
Example
• Susanne and Philip want to exchange
some information
• first case: they stand close to each other
• what do they have to agree on for being
able to exchange the information??
© ComTec 2005
Example: close to each other
• they must agree on the same language the same representation of Info
• They must speak loud enough so that
they can hear each other - physical layer
• they must agree on the speed of talking
and must provide the other person some
time to react - flow control
© ComTec 2005
Example: close to each other
• If communication between more than
two: who should be able to communicate
- multiple access
• they must repeat a word/ sentance if the
other did not understand - end - to - end
reliability
• ....
© ComTec 2005
Example: if in different towns
• they write letters to each other addressing (routing, switching)
• ...
© ComTec 2005
Additions
© ComTec 2005