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PPT : 3G Seminar with Free Download

Published on Apr 02, 2024



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--> Third generation is the generic term used for the next generation of mobile communications systems.

--> 3G will provide enhanced services to those - such as voice, text and data - predominantly available today

--> Video on demand, high speed multimedia and mobile Internet access are just a few of the possibilities for users in the future.

--> 3G Services will expand the possibilities of information and communication

--> The technology concepts for third generation systems and 3G services are currently under development industry wide.

--> The global 3G Partnership Project (3GPP), a collaboration of organisations which includes the GSM Association, are committed to bringing us the 3rd Generation mobile systems

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Introduction - Evolution of the Mobile Market

--> First generation (1g)

--> Second generation (2g)

--> Third generation (3g)

--> Fourth generation (4g)

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Access Technologies

--> FDMA

--> TDMA

--> CDMA

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What is 3G?

--> 3G" stands for the "third generation" of mobile phones. Basically, a 3G device will provide a huge range of new functionality to your mobile.

--> Up until now, your mobile phone has mainly been used only to carry voice messages, with maybe a bit of SMS text as well. 3G will allow simultaneous transfer of speech, data, text, pictures, audio and video.

--> A 3G device will blur traditional boundaries of technology - computing, communications, and consumer devices.

--> Your 3G device will be your PC, your phone, and your PDA all in one.

--> It would not be too much of an exaggeration to say that people will live their lives around their 3G devices.

--> You'll have the world at your fingertips: anything, anytime, anywhere

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3G will provide

--> High-speed, mobile access to the Internet

--> Your choice of entertainment on demand. This will include movies (on the device's high-resolution screen) and music

--> Video-conferencing

--> Mobile shopping

--> Travel information

--> You could always use it as a phone

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Simplex vs. Duplex

--> When people use walkie-talkie radios to communicate, only one person can talk at a time (the person doing the talking has to press a button).

--> This is because walkie-talkie radios only use one communication frequency - a form of communication known as simplex

--> Of course, this is not how mobile phones work. Mobile phones allow simultaneous two-way transfer of data - a situation known as duplex

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--> Wireless duplexing has been traditionally implemented by dedicating two separate frequency bands: one band for the uplink and one band for the downlink (this arrangement of frequency bands is called paired spectrum). This technique is called Frequency Division Duplex, or FDD

--> Duplex communications can also be achieved in time rather than by frequency.

--> In this approach, the uplink and the downlink operate on the same frequency, but they are switched very rapidly: one moment the channel is sending the uplink signal, the next moment the channel is sending the downlink signal.

--> Because this switching is performed very rapidly, it does appear that one channel is acting as both an uplink and a downlink at the same time.

--> This is called Time Division Duplex, or TDD. TDD requires a guard time instead of a guard band between transmit and receive streams

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--> The 3G network might be divided up in hierarchical fashion

--> Macro cell - the area of largest coverage, e.g., an entire city.
--> Micro cell - the area of intermediate coverage, e.g., a city centre.
--> Pico cell - the area of smallest coverage, e.g., a "hot spot" in a hotel or airport

--> TDD mode does not allow long range transmission (the delays incurred would cause interference between the uplink and the downlink).

--> For this reason, TDD mode can only be used in environments where the propagation delay is small (pico cells).

--> TDD mode is highly efficient for transmission of internet data in pico cells

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--> A qualitative comparison of mobile wireless technologies that could be viewed simultaneously as substitute and/or complementary paths for evolving to broadband wireless access.

--> The goal of the analysis is to explore the future of wireless access and to speculate on the likely success and possible interactions between the mobile technologies in the future.

--> Successful implementation, adoption, and overall acceptance of the 3G wireless networks depends largely on the ability of these new mobile networks to interface and inter-work with the existing 2G and legacy networks currently deployed worldwide.

--> 3G is a class apart from other older generations.

--> It would blur the traditional boundaries of technologies- computing, communication and consumer devices.

--> Let’s hope that 3G technology will come up world wide, providing users with global roaming

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--> Encarta Encyclopedia
--> Britannica Encyclopedia

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