information and communication technology the ......fig. 1 — schematic diagram of a general...
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Information and Communication Technology:
The INFORMATION THEORY(CONTINUED)
presented by: Rhiza S. Sadjad
[email protected] http://www.unhas.ac.id/rhiza/
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The INFORMATION CAPACITY or Bit Rate of Data Transmission
1 Kbps1000 bit per second1 Mbps1000 Kbps
1 bps1 bit per second
1 Gbps1000 Mbps
1 Byte per second8 to 10 bit per second1 Bps
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The Information Capacity (Bit Rate)
According to Shannon [1948], there are
2 (two) factors related to the
information capacity:◉ Bandwidth◉ Channel Quality (Signal to Noise Ratio,
S/N atau SNR)
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The Communication Model
[1948] Claude E. Shannon, ”A Mathematical
Theory of Communication” (a technical notes)
/home/rhiza/Desktop/shannon.pdf[1949] Claude E. Shannon and Warren
Weaver, ”The Mathematical Theory of
Communication” (popular version)
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The Communication Model
[1948] Claude E. Shannon, ”A Mathematical
Theory of Communication” (a technical notes)
/home/rhiza/Desktop/shannon.pdf[1949] Claude E. Shannon and Warren
Weaver, ”The Mathematical Theory of
Communication” (popular version)
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Communication Model
INFORMATION
SOURCE TRANSMITTER RECEIVED RECEIVER DESTINATION
SIGNAL SIGNAL
MESSAGE MESSAGE
NOISE
SOURCE
Fig. 1 — Schematic diagram of a general communication system.
Shannon and Weaver [1949], simplex mode
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The Shannon [1948] formula to compute the Information Capacity:
Information Capacity [bps] = (Bandwidthi [Hertz])* 2log ( 1 + S/N)Schweber, [1996], page 16
The Information Capacity (Bit Rate)
INFORMATION
SOURCE TRANSMITTER RECEIVED RECEIVER DESTINATION
SIGNAL SIGNAL
MESSAGE MESSAGE
NOISE
SOURCE
Fig. 1 — Schematic diagram of a general communication system.
Shannon and Weaver [1949], simplex mode
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The Information Capacity (Bit Rate)
Bit Rate = BW * 2log ( 1 + S/N)
Bit Rate (The Information Capacity) : The amount of information transmitted in a unit
of time [bit per second, bps] through a communication channel BW (Bandwidth) :The spectrum of signals transmittable in the channel [Hertz, getaran
per detik, cycles per second, cps], the difference between the highest freuency and
the lowest frequency S/N (Signal to Noise ratio) : the quality of the channel in terms of the ratio of the
transmitted signal power and the noise power
The Shannon [1948] formula to compute the Information Capacity:
Information Capacity [bps] = (Bandwidthi [Hertz])* 2log ( 1 + S/N)Schweber, [1996], page 16
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INFORMATIONSOURCE TRANSMITTER RECEIVED RECEIVER DESTINATION SIGNAL SIGNAL MESSAGE MESSAGE NOISE
SOURCE
Fig. 1 — Schematic diagram of a general communication system.
Shannon and Weaver [1949], simplex mode
HALF-DUPLEX (two SIMPLEXs, one at the time)FULL-DUPLEX (two SIMPLEXs)
SINGLE-SOURCE SINGLE-DESTINATION
The MODEs of Communication
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not a simplex modenot a full-duplex
not a half-duplex, but ..........the NETWORK !
MULTI-SOURCE MULTI-DESTINATION
The MODEs of Communication
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The NETWORK mode
MULTI-SOURCE MULTI-DESTINATION
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MODE JARINGAN (Network)
MULTI-SOURCE MULTI-DESTINATION
All kinds of NETWORK: LOCAL AREA NETWORK (LAN) WIDE AREA NETWORK (WAN) METROPOLITANT AREA NETWORK
(MAN) CAMPUS AREA NETWORK (CAN) The INTRANET The INTERNET
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The INTERNET ........ Read :
http://en.wikipedia.org/wiki/History_of_the_Internet
A “non-hierarchical” organization Members: Computers and the Accessories “Permanent” and “Temporary” members Every single member has its ”IP address”
(IP = Internet Protocol) : Version 4: 000.000.000.000 to
255.255.255.255, ”local” and ”public” IP Ipv6 (version 6)
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The INTERNET member........ Every single member of the Internet has its
specific function: servers: mail-server, file-server, web-
server, list-server, Domain-Name Server (DNS), dll...........
routers: the traffic controllers bridges: connecting networks terminal, client etc.
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Packet Data Communication ........ Using a communication protocol: TCP/IP Communication by sending and receiving
DATA PACKETS Each DATA PACKET has its CONTENTS
and its ”WRAPPER”, its SENDER's Address and its DESTINATION/RECEIVER's Address
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to see .......the