PPT : 3G Seminar with Free Download
Published on Feb 15, 2021
Slide 1 :
WELCOME TO THE SEMINAR
Slide 2 :
--> 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
Slide 3 :
Introduction - Evolution of the Mobile Market
--> First generation (1g)
--> Second generation (2g)
--> Third generation (3g)
--> Fourth generation (4g)
Slide 4 :
Slide 5 :
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
Slide 6 :
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
--> Mobile shopping
--> Travel information
--> You could always use it as a phone
Slide 7 :
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
Slide 8 :
TDD vs. FDD
--> 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
Slide 9 :
Slide 10 :
--> 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
Slide 11 :
--> 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
Slide 12 :
--> Encarta Encyclopedia
--> Britannica Encyclopedia
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