Wireless Network
The Seventh Meeting
Wireless Standard
3
WiFi
 There are two modes, namely WiFi Ad-hoc and
Infrastructure.
 Currently there are three variations of 802.11
which is often used, namely: 802.11a, 802.11b,
and 802.11g
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WiFi-Ad Hoc Mode
Ad-hoc mode is basically similar to a bus topology
on the wired network. Ad hoc mode does not
require a central node or Access Point.
Wi-Fi client can communicate in a peer to peer.
Each Wi-Fi client will act as a liaison and repeater
(signal amplifier) for the Wi-Fi client who is in the
next
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WiFi-Ad Hoc Mode
 Ad-hoc mode is suitable if the WLAN to be built
will not connect to the wired line.
 This mode is usually built in emergency
conditions such as sudden meeting in a place
that is not available wireless networks
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WiFi-Ad Hoc Mode
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WiFi-Infrastruktur Mode
 Infrastructure mode is similar to a star topology on the wired
network line.
 Infrastructure mode / point-to-multipoint use at least a
central node or access point.
 Access point serves as a liaison with WLAN and the wired
LAN.
 The access point can also be used as a repeater for all Wi-Fi
clients.
 The entire network will be totally disconnected if the access
point is used dead or damaged.
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WiFi-Infrastruktur Mode
Wireless LAN
 Wireless LAN acting as an
extension of a wired network with
high flexibility
Perluasan Akses
Dengan Multi AP
 To expand the network without
cable installation, can be easily
used to provide a connection
without a building / campus that
has a large area
Koneksi antar
LAN dengan
wireless
Topologi Wireless LAN
Small Office Home Office
Bridge Mode
Campus WLAN Koneksi
beberapa gedung
Enterprise Wireless LAN
Repeater Mode
Addhoc Mode
Public wireless LAN dengan otentikasi
Wireless PAN
 Wireless is used in a relatively short
distance <30 feet, is used to transfer
information at a limited distance
 WPAN not require a lot of battery power
so it is ideal for small devices such as
audio headsets, PDAs, game consoles
stick, digital camera etc.
 Technology: IrDA, Bluetooth, Ultra Wide
Band
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Bluetooth (802.15)
 Bluetooth is a wireless communication technology (without
cable) which operates in the frequency band of 2.4 GHz
unlicensed ISM (Industrial, Scientific and Medical) by using a
frequency hopping transceiver capable of providing voice
and data communication services in real-time between
hosts bluetooth with a limited distance range of services.
 Bluetooth can be a card that form and function is similar to
the card used for wireless local area network (WLAN) that
use radio frequency standard IEEE 802.11
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WiMAX (802.16)
 Access to the data communication using the WLAN
standard IEEE 802.11, and is commonly called WiFi. But WiFi
has limited range area, a simple QoS, frequency of use
can be licensed or unlicensed, and capacity is limited.
Because of limited mobility that is supported by the
demands of users, the WiMAX technology developed by
using standard IEEE 802.16a
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WiMAX (802.16)
NO
Komponen
802.11 (WiFi)
802.16 (WiMAX)
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Range
100 meter (indoor), kondisi LOS > 50 km (outdoor), kondisi LOS
dan NLOS
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Performansi
Max 54 Mbps (pada 20 MHz)
Max 63 Mbps (pada 14 MHz)
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Scalability
Pengkanalan 20 MHz,
MAC untuk 10 user
Pengkanalan 1.5 – 20 MHz,
MAC mendukung hingga 1000
user
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Spectral
Efficiency
Unlicensed
Licensi dan unlicensed
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MAC
CSMA/CD
Grand Based
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QoS
Sederhana
Canggih
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Cellular
 Cellular network component consists of a base station,
MTSO (Mobile Telecommunication Switching Office) and
mobile communication devices.
 The function of the base station is providing the connectivity
of radio communication with mobile devices that are in a
region of the cell.
 While serving as a regulator of traffic MTSO communication
receiving and connecting a call from a mobile device users
to the PSTN network, monitor the quality of the
communication signal and regulate the flow of the base
station which handles the communication with a mobile
device.
Wireless Wide Area Network
 Wireless Wide Area Network uses mobile
telecommunication
technology
/
cellular network to transfer data such as:
WIMAX
(applied
to
the
WMAN
Networks), UMTS, GPRS, CDMA2000,
GSM, CDPD, Mobitex, HSDPA or 3G
 Allows the connection of a laptop with
internet access using WWAN card,
email, VPN access, etc. via cellular
phone.
Wireless RAN
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WRAN
Base Station
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Wireless
MIC
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TV Transmitter
WRAN
Base Station
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WRAN
Repeater
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Wireless
MIC
Typical ~33km
Max. 100km
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: WRAN Base Station
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: CPE
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