Wireless networks


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Difference between 1G, 2G, 3G

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Wireless networks

  1. 1. 2011Submitted to:Mam Sana YousafSubmitted by:Zarnigar AltafBCS VI02-03-2011Mobile Communication and Networks 1 GENERATIONS OF WIRELESS NETWORK
  2. 2. WIRELESS NETWORKWireless networks utilize radio waves and/or microwaves to maintain communication channelsbetween computers. Wireless networking is a more modern alternative to wired networking thatrelies 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 ofwireless include the potential for radio interference due to weather, other wireless devices, orobstructions like walls.GENERATIONS OF WIRELESS NETWORK1G - The first generation1G refers to the first-generation of wireless telephone technology, mobile telecommunications. Itwas using analog telecommunications standards that were introduced in the 1980s. It has theability to transfer calls from one site to the next as the user travelled between cells during aconversation, as 1G was based on Frequency Division Multiple Access (FDMA) for transferbetween cells. It was very vague and had a low capacity. These services are provided with circuitswitching. This allows users to make voice calls in 1 country.2G -The second generationIn the 1990s, the second generation mobile phone systems emerged; primarily using the GSMstandard. It was their first major upgrade when they went from 1G to 2G. This leap effectivelytook cell phones from analog to digital. With this second generation introduced a new variant ofcommunication called SMS or text messaging. Across the world, many operators adopted theGlobal System for Mobile communication (GSM) standard, which used Time Division MultipleAccess (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 datacapabilities over GPRS 2
  3. 3. 3G - The third generationAs the use of 2G phones became more widespread and people began to utilize mobile phones intheir daily lives, it became clear that demand for data services (such as access to the internet) wasgrowing. If we can expect 3- 5 mbps of speed, which is actually equal to cable/DSL kind ofspeed in to a moving device! That’s what all about 3G. This enabled faster data-transmissionspeeds, greater network capacity and more advanced network services, basically turns your cellphones to a mini computer.Another thing to be noted in case of 3G is that Wide Band Voice Channel, by this the world hasbeen contracted to a little village because a person can contact with other person located in anypart of the world and can even send messages too. 3G gives clarity of voice as well can talkwithout any disturbance simultaneously. Not only these but also have entertainments such as FastCommunication, Internet, Mobile T.V, Video Conferencing, Video Calls, Multi MediaMessaging Service (MMS), 3D gaming, Multi-Gaming etc are also available with 3G phones. Itdoes 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, WLANand Bluetooth) and mobile devices area (cell phone and GPS) 3