gan (generic access network
TRANSCRIPT
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GENERIC ACCES NETWORK /UNLINSCENCE
MOBLIE NETWORK
PRESENT
BY
ALABI OLALEKAN
COSC 380
DR. SMITH
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GENERIC ACCES NETWORK /UNLINSCENCE
MOBLIE NETWORK
Introduction
Definition of GAN/UMN
Modes of operation
Security Advantages (To both Carriers and Subscribers)
Disadvantages
Compactible Devices/Routers
Reference
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INTRODUCTION
Generic Access Technology is a 3rd generation term in
wireless communications, where it helps to move voice
and text (the conventional mobile-telephony services) to
IP Network .
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DEFINITION OF GAN/UMA
Generic Access Network in simple words is the
system that enables users to switch to an IP-Network
over Wi-Fi
When a mobile discover that it is in the range of a
Wi-Fi access point or public hotspot, it establishes asecure IP-Connection to the GAN Controller present
in the Core network
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MODES OF OPERATION
A typical GAN/ UMN handset will have four modes of
operation:
1. GSM/EDGE radio access network (GERAN) -
only: uses only cellular networks
2. GERAN-preferred: uses cellular networks if available,
otherwise the 802.11 radio
3. GAN-preferred: uses a 802.11 connection if an access
point is in range, otherwise the cellular network
4. GAN-only: uses only the 802.11 connection
The handset scans for GSM cells when it first turns on, to
determine its location area. This allows the carrier to route thecall to the nearest Generic Access Network Controller
(GANC), set the correct rate plan, and comply with existing
roaming agreements.
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Diagram of GAN function test
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SECURITY
Authentication set up being provided before user
gain access to the network services.
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ADVANTAGES
To both Carriers and Subscribers:
Rather than setting up costly sites in areas where
coverage cannot be provided i.e. the Dead Zone, GAN
supports coverage through low power 802.11 Access
Points
To Subscribers:
Device that use 802.11 implies low and affordable
rates, better coverage at homes, also low roaming
charges outside ones network
GAN combines GSM and 802.11 into a service that
uses a single number, a single handset, a single set of
services and a single phone directory for all calls.
GAN can migrate between IP and cellular coverage
and is thus seamless
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To carriers:
GAN relieves congestion
It reduces the amount of load on cellular
networks, by shifting some burden to internet
infrastructure
It provide the ability to shift calls to internet
infrastructures
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DISADVANTAGES
The user must have Wi-Fi/GAN enabled
Mobile phones to gain access to the services
The Mobile phones that support both Wi-
Fi/UMA may be costly
Calls are prone to disconnect in lieu of
transitions from Wi-Fi to the wireless service
and vice versa
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SUPPORTED DEVICES
BlackBerry
HTC
Huawei
LG
Motorola
Nokia
Sagem
Samsung
Sony Ericsson
(Routers)
Linksys WRT54G series
Westell
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REFERENCE
http://www.afterdawn.com/glossary/term.cfm/unlicensed_mobile_access