Saturday, 21 June 2014

TELECOMMUNICATION

TELECOMMUNICATION



























First thing that comes in our mind " What is communication?"

Communication means exchange of thought/ ideas / information from sender/ transmitter to receiver at a short distance level.

Second thing that comes then " What is telecommunication?"

Telecommunication is combination of two words - Tele + Communication

Tele means Distance/ Remote  & Communication means Exchange of ideas/ thought/ information / voice.

                                      Tele + Communication :-

(Distance/ Remote ) + ( Exchange of ideas/ thoughts/information / voice)          


Now you can say that telecommunication is a distance communication through wired or wireless.


Some important points:-

Initially Telecommunication start by TELEGRAPHY in 1980's and then
By FIXED LINE in late 1980's & after that
By WIRELESS COMMUNICATION  in 1990's


Threats of Telecom: -

  1.  Accuracy
  2.  Time Delay
  3.  Reliability / Security



  • Our aim to make a better telecommunication by improving Accuracy and Reliability and  minimizing time delay . We can minimize them but not completely eliminate them. So we minimize these threats as much as possible.

NOTE:- In INDIA , wireless communication start in 1990's.

Now I will tell you  about all the Generations which is known as Releases.


Evolution graph of GSM 



  GSM means GLOBAL SYSTEM FOR MOBILE COMMUNICATION
 
 

  R stands for Release
  GPRS-  GENERAL PACKET RADIO SERVICES
  EDGE -  ENHANCE DATA RATE FOR GSM EVOLUTION
  UMTS - UNIVERSAL MOBILE TELECOM SERVICES
  HSDPA - HIGH SPEED DOWNLINK PACKET ACCESS
  HSUPA - HIGH SPEED UPLINK PACKET ACCESS
  MIMO - MULTI INPUT MULTI OUTPUT ( This is an Antenna solution)
  HSPA  - HIGH  SPEED PACKET ACCESS
  LTE -  LONG TERM EVOLUTION
  SAE  -  SYSTEM ARCHITECTURE 

 (Sorry - In this image full form of UMTS is not written correct.)