Difference between 1G, 2G, 3G

1. 2011
Submitted to:
Mam Sana Yousaf
Submitted by:
Zarnigar Altaf
BCS VI
02-03-2011
Mobile Communication and Networks
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GENERATIONS OF WIRELESS
NETWORK

2. WIRELESS NETWORK
Wireless networks utilize radio waves and/or microwaves to maintain communication channels
between computers. Wireless networking is a more modern alternative to wired networking that
relies on copper and/or fiber optic cabling between network devices.
A wireless network offers advantages and disadvantages compared to a wired network.
Advantages of wireless include mobility and elimination of unsightly cables. Disadvantages of
wireless include the potential for radio interference due to weather, other wireless devices, or
obstructions like walls.
GENERATIONS OF WIRELESS NETWORK
1G - The first generation
1G refers to the first-generation of wireless telephone technology, mobile telecommunications. It
was using analog telecommunications standards that were introduced in the 1980s. It has the
ability to transfer calls from one site to the next as the user travelled between cells during a
conversation, as 1G was based on Frequency Division Multiple Access (FDMA) for transfer
between cells. It was very vague and had a low capacity. These services are provided with circuit
switching. This allows users to make voice calls in 1 country.
2G -The second generation
In the 1990s, the 'second generation' mobile phone systems emerged; primarily using the GSM
standard. It was their first major upgrade when they went from 1G to 2G. This leap effectively
took cell phones from analog to digital. With this second generation introduced a new variant of
communication called SMS or text messaging. Across the world, many operators adopted the
Global System for Mobile communication (GSM) standard, which used Time Division Multiple
Access (TDMA)
• Planned for voice transmission with digital signal and the speeds up to 64kbps
• 2G was the digital handsets that we are used today, with 2.5G representing handsets with data
capabilities over GPRS
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3. 3G - The third generation
As the use of 2G phones became more widespread and people began to utilize mobile phones in
their daily lives, it became clear that demand for data services (such as access to the internet) was
growing. If we can expect 3- 5 mbps of speed, which is actually equal to cable/DSL kind of
speed in to a moving device! That’s what all about 3G. This enabled faster data-transmission
speeds, greater network capacity and more advanced network services, basically turns your cell
phones to a mini computer.
Another thing to be noted in case of 3G is that Wide Band Voice Channel, by this the world has
been contracted to a little village because a person can contact with other person located in any
part of the world and can even send messages too. 3G gives clarity of voice as well can talk
without any disturbance simultaneously. Not only these but also have entertainments such as Fast
Communication, Internet, Mobile T.V, Video Conferencing, Video Calls, Multi Media
Messaging Service (MMS), 3D gaming, Multi-Gaming etc are also available with 3G phones. It
does this by using High speed downlink packet access and universal mobile telephone system.
• Developed in the late 1990s until present day.
• Japan is the first country having introduced 3G nationally.
• It gives Global roaming facility.
• Superior voice quality and video conference
• Data always add–on services (e-mail, personal organizer, etc.)
• Information for web surfing, music, news, corporate intranet, transportation service etc.
• On-line shopping facility.
• Transmission speeds from 125kbps to 2Mbps
• In 2005, 3G is ready to live up to its performance in computer networking (WCDMA, WLAN
and Bluetooth) and mobile devices area (cell phone and GPS)
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