Session-1

Question 1

mobile apps vs. mobile websites

Answer 1

mobile apps are more convenient , faster, easier to browse, better use experience ,easier to check back account, easier to shop

Question 2

Mobile Equipment (ME)

Answer 2

This refers to the physical phone itself. The phone must be able to operate on a cellular network

Question 3

Base Transceiver Station (BTS)

Answer 3

Base Transceiver Station (BTS) – It is actually the antenna that you see installed on top of the tower. The BTS is the Mobile Phone’s access point to the network. It is responsible for carrying out radio communications between the network and the Mobile Phone.

Question 4

What is a Cell

Answer 4

What is a Cell – A base station (transmitter) having a number of RF channels is called a cell. Each cell covers a limited number of mobile subscribers within the cell boundaries (Coverage area).

Question 5

Cell Size and Capacity

Answer 5

Cell Size and Capacity – Cell size determines number of cells available to cover geographic area and (with frequency reuse) the total capacity available to all users. Capacity within cell limited by available bandwidth and operational requirements. Each network operator has to size cells to handle expected traffic demand

Question 6

Base Station Controller (BSC)

Answer 6

Base Station Controller (BSC) – The BSC controls multiple BTSs. It handles allocation of radio channels, frequency administration, power and signal measurements from the MS, and handovers from one BTS to another (if both BTSs are controlled by the same BSC).

Question 7

Mobile Switching Center (MSC)

Answer 7

Mobile Switching Center (MSC) – The MSC is the heart of the GSM network. It handles call routing, call setup, and basic switching functions. An MSC handles multiple BSCs and also interfaces with other MSC’s and registers.

Question 8

CELL PHONE

Answer 8

CELL PHONE - It is the radio transmitter that sends the signals to the towers in order to transmit digitized voice signals through the network.

Question 9

Cell Site/TOWER

Answer 9

Cell Site/TOWER - is a cellular telephone site where antennas and electronic communications equipment are placed, usually on a radio mast, tower or other high place, to create a cell (or adjacent cells) in a cellular network.

Question 10

HUB

Answer 10

HUB - It is what the tower communicates with. These hubs will either connect to other hubs or use satellite dishes to provide network connections back to the phone via the cell tower.

Question 11

GSM

Answer 11

GSM Standard - Global System for Mobile Communication

Question 12

GSM Standard

Answer 12

Service: Voice calling, text, messaging, data service similar to CDMA

 Feature: One of the key features of GSM is the Subscriber Identity Module, commonly known as a SIM card.  The SIM is a detachable smart card containing the user’s subscription information and phone book. This allows the user to retain his or her information after switching handsets.  SIM card that identify the user on the network and could be used as a storage.  SIM cards allowed users switch phones by simply moving their SIM’s between the phones.

Question 13

CDMA

Answer 13

Code Division Multiple Access

Question 14

CDMA Standard

Answer 14

Service: Voice calling, text, messaging, data transmission

Features: Five times up of GSM capacity. More secure –used by military. QUALCOMM designs the chips for the CDMA air interface.

CDMA phones cannot roam internationally as extensively as GSM phones nor can they transmit voice and data at the same time like GSM handsets.

CDMA phones are locked to a carrier. It’s usually cheaper to buy unlocked GSM phones than on-contract CDMA phones.

Question 15

LTE

Answer 15

Long Term Evolution 
is a 4G wireless communications standard developed by the 3rd Generation Partnership Project (3GPP) that’s designed to provide up to 10x the speeds of 3G networks for mobile devices such as SmartPhones, Tablets, NetBooks, Notebooks and Wireless Hotspots.

Question 16

SATTELITE

Answer 16

SATTELITE - artificial object which has been intentionally placed into orbit.  Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth’s Moon.

Question 17

Common types satellites

Answer 17

Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites.

Question 18

Satellite navigation

Answer 18

Satellite navigation (“satnav”) means using a portable radio receiver to pick up speed-of-light signals from orbiting satellites so you can figure out your position, speed, and local time

Question 19

The best-known satnav system, the Navstar Global Positioning System (GPS)

Answer 19

uses about 24 active satellites (including backups). Day and night, 365 days a year, they whiz round Earth once every 12 hours on orbital planes inclined at 55 degrees to the equator.

 GPS was kick-started by the US military in 1973 and its satellites are designed to last about 7.5 years, but the latest generation typically survive about 10–12 years.
The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense.

 The 24 satellites that make up the GPS space segment are orbiting the earth about 12,000 miles above us. They are constantly moving, making two complete orbits in less than 24 hours. These satellites are travelling at speeds of roughly 7,000 miles an hour.

 GPS satellites are powered by solar energy. They have backup batteries onboard to keep them running in the event of a solar eclipse, when there’s no solar power. Small rocket boosters on each satellite keep them flying in the correct path.

Question 20

WiFi

Answer 20

WiFi is a technology that uses radio waves to provide network connectivity. WiFi- most widely accepted definition for the term in the tech community is Wireless Fidelity.
Wireless technology has widely spread lately and you can get connected almost anywhere; at home, at work, in libraries, schools, airports, hotels and even in some restaurants.
 Like mobile phones, a WiFi network makes use of radio waves to transmit information across a network. The computer should include a wireless adapter that will translate data sent into a radio signal.

Question 21

WiFi Frequencies

Answer 21

Wireless networking is known as WiFi or 802.11 networking as it covers the IEEE 802.11 technologies. The major advantage of WiFi is that it is compatible with almost every operating system, game device, and advanced printer.

 A wireless network will transmit at a frequency level of 2.4 GHz or 5GHz to adapt to the amount of data that is being sent by the user. The 802.11 networking standards will somewhat vary depending mostly on the user’s needs.
The 802.11a will transmit data at a frequency level of 5GHz. The Orthogonal Frequency-Division Multiplexing (OFDM) used enhances reception by dividing the radio signals into smaller signals before reaching the router. You can transmit a maximum of 54 megabits of data per second.
The 802.11b will transmit data at a frequency level of 2.4GHz, which is a relatively slow speed. You can transmit a maximum of 11 megabits of data per second.
The 802.11g will transmit data at 2.4GHz but can transmit a maximum of 54 megabits of data per second as it also uses an OFDM coding.
The more advanced 802.11n can transmit a maximum of 140 megabits of data per second and uses a frequency level of 5GHz.

Question 22

BSC

Answer 22

Base Station Controller

Question 23

ME

Answer 23

Mobile Equipment

Question 24

IMEI

Answer 24

International Mobile Equipment Identity Number

Question 25

SIM

Answer 25

Subscriber Identity Number

Question 26

QUALCOMM

Answer 26

chip maker

Question 27

SMS

Answer 27

short message service

Question 28

GPS

Answer 28

Navstar global positioning center

Question 29

4G

Answer 29

4 Generation of data technology (4-5 time faster than 3G)