BCom_Computer Application Notes

Mobile technology

In networking  terminology , wireless is the  term used to describe  any computer network where there is no physical  wired connection between sender and receiver, but rather the network is connected by radio waves and or microwaves to maintain communications.Mobile technology is a form of technology that is mostly used in cellular communication.

1G  TECHNOLOGY

The first generation of wireless telephony technology was referred to as 1G.The speed of 1G was 2.4 kbps telecommunications.It's Speed was upto 2.4kbps.  It allows the voice calls in 1 country. 1G network use  Analog Signal.  AMPS was first launched in USA in 1G mobile   systems.

Note:- First generation (1G) cellphones were analog devices. Second generation (2G) devices were digital, and third generation (3G) allows for voice, data and advanced services.

Disadvantages

ü  Poor Voice Quality

ü  Poor Battery Life

ü  Large Phone Size

ü  No Security

ü  Limited Capacity

ü  Poor Handoff Reliability

2G  TECHNOLOGY

 2G technology  refers to the 2 nd  generation  which is  based on GSM.It was launched in Finland in the year 1991.2G network use digital signals.It’s  data speed was upto 64kbps. It includes Digital Text messages, picture messages and MMS. It provides better quality and capacity and consumes less battery power, improves the voice clarity, reduces noise in the line, and gives security and safety to the data and voice calls.

Three primary benefits of 2G networks over their predecessors were that phone conversations were digitally encrypted; 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages.

2G system uses digital mobile access technology such as TDMA and CDMA. TDMA divides signal in time slots while as CDMA allocates each user a special code to communicate over a multiplex physical channel.

The main difference between the 1G and 2G, is that the radio signals used by 1G network are analog, while 2G networks are digital. 2G technologies can be divided into TDMA-based and CDMA-based standards.

Characteristics

It enables services such as text  messages, picture messages and MMS (multi media message).It provides better quality and capacity.2.5G  is a technology between the second  (2G) and  third (3G) generation  of mobile telephony.2.5G is sometimes described as 2G Cellular Technology combined with GPRS.

The term 2.5G is sometimes used to refer to General Packet Radio Service (GPRS), which is a wireless data standard used on GSM networks and was the first step in the evolution of 3G technology. 2.5G, which stands for "second and a half generation," is a cellular wireless technology developed in between its predecessor, 2G, and its successor, 3G.

3G  TECHNOLOGY

 3G  technology  refer to third generation which was introduced in  year  2000s.

FEATURES OF 3G TECHNOLOGY

ü  Providing Faster Communication

ü  Send/Receive Large Email Messages

ü  High Speed Web / More Security

ü  Video Conferencing / 3D Gaming

ü  TV Streaming/ Mobile TV/ Phone Calls

ü  Large Capacities and Broadband Capabilities.

4G TECHNOLOGY (Anytime ,Anywhere)

 4G  technology refer  to or short name of fourth Generation   which was started from late 2000s. Capable of providing 100Mbps – 1Gbps speed.

5G TECHNOLOGY

 5G  technology  refer to short name of  fifth Generation  which was started from late 2010s. Complete wireless communication  with almost no limitations. High Speed, High Capacity 5G technology providing  large broadcasting of data in Gbps . Support interactive multimedia , voice,  streaming video etc.