Introduction TO Wireless Network

May 26 • Notes • 3942 Views • 1 Comment on Introduction TO Wireless Network

WIRELESS NETWORK

INTRODUCTION

Wireless network refers to any type of computer network that uses wireless for network connection.

It is a method by which homes telecommunication networks and enterprise installation avoid the costly process of introducing cables into building or as a connection between various equipment location. Wireless telecommunication networks are generally implemented and administered using radio communication.

Wireless Network question answers for interviewed

Wireless Network question answers

Some example of usage include the cellular phone , inter-continental network system and the use of radio satellite to communicate across the world and many more.

TYPES OF WIRELESS NETWORK

  1. Wireless PAN(Personal Area Network)
  2. Wireless LAN(Local Area Network)
  3. Wireless mesh network
  4. Wireless MAN(Metropolitan Area Network)
  5. Wireless WAN(Wide Area Network)
  6. Cellular Network

GENERATION OF WIRELESS NETWORK

There are four generation of wireless network

  • First Generation (1G)
  • Second Generation(2G)
  • Third Generation(3G)
  • Fourth generation(4G)

 

  1. FIRST GENERATION(1G)

These are the analog cellphone standards that were introduced in the 1980s and continued until being replaced by 2G digital cell phones. The main difference between two succeeding mobile telephone system 1G and 2G is that, the radio signal that 1G network use are  analog while 2G networks are digital. Although both system uses digital signaling to connect the radio tower to the rest of telephone system.

Technoligies used in 1G systems includes:-

  • NMT(Nordisk Mobile Telefoni)
  • AMPS(Advanced Mobile Phone System)/TACS/ETACS
  • HiCAP
  • CDPD(Cellular Digital Packet Data)
  • Mobitex
  • Data TAC

 

  1. SECOND GENERATION(2G)

2G cellular telecom network were commercially launched on the GSM standard IN Finland. After 2G was launched the previous mobile telephone system were retrospectively dubbed 1G. 2G technologies hold sufficient security for both the sender and the receiver. The main differentiator to previous mobile telephone system 1G nmetworks use are analog while 2G networks are digital.

 

Technologies used in 2G system are:-

2G Technologies can be devided into TDMA based and CDMA based standard                                                                                      depending upon the type of multiplexing used. The main 2G standards are:

  • GSM(TDMA based), originally from Europe but used world wide
  • iDEN(TDMA based), proprietary network used by the Nextel in the United State
  • D-AMPS(TDMA based), used in the America and parts of Asia
  • IS-95/CDMA one
  • PDC(TDMA based), used exclusively in Japan
  • CSD
  • PHS
  • GPRS
  • HSCSD
  • WiDEN
  • CDMA 2000 1X RTT/IS-200
  • EDGE

2G services are frequently referred as Personal Communication Service, or PCS in the US.

  1. THIRD GENERATION(3G)

3G provides the ability to transfer simultaneously both voice data and non-voice data. The first country that introduced 3G on alarge commercial scale was JAPAN.

3G networks are wide area cellular telephone networks which evolved to incorporate high-speed internet acess and video telephony.

The most significant feature offered by the 3G mobile technologies is the capacitry to support greater number of voice and data customers especially in urban centres, as well as high data rates at lower incremental cost than 2G. 3G uses 5MHz channel carrier to deliver significantly higher data rates. It allows the transmission of 384kbpsfor mobile system and 2Mbps for stationary system.

3G Standards:-

International Telecomunication unit(ITU): IMT-2000 consist of six radio interfaces

  • W-CDMA
  • CDMA-2000
  • CDMA-2001
  • TD-CDMA/TD-SCDMA
  • UWC-136
  • DECT
  1. FOURTH GENERATION(4G)

It is a successor of third generation (3G) standards. A 4G system provides mobile ultra-broadband internet acess, for example to laptops with USB wireless modems , to smart phones and to other mobile devices.

The Wireless World Research Forum(WWRF) defines 4G as a network that operates on Internet technology, combines it with the other application and technologies such as Wi-Fi and WiMAX and runs at speed ranging from100Mbps to 1Gbps.

4G Standards:-

  • Spectral efficient system
  • High network capacity
  • Nominal data rate of 100Mbps at high speed
  • Smooth handoff across heterogeneous network
  • Seamless connectivity and global roaming across multiple network
  • Interoperable with the existing wireless network
  • All IP system, packet switched network

QUESTION & ANSWER

  1. What is Wireless network??

ANSWER

It refers to any type of computer network that uses wireless for network connection. It is a method by which homes telecommunication networks and enterprise installation avoide the costly process of introducing cables.

2. What is the main difference between 1G and 2G??

ANSWER

The main difference between 1G and 2G is , 1G network uses analog radio signal while 2G uses digital.

3. What is the use of Wireless network??

ANSWER

  • Cellular phones allowing easy personal communication
  • Inter-continental network system
  • Radio satellite to communicate across the world
  • Emergency services such as the police utilize wireless network and many more.

4. What are generation of wireless network??

ANSWER

There are four generation of wireless network

  • First generation(1G)
  • Second generation(2G)
  • Third generation(3G)
  • Fourth generation(4G)

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  1. muhammad abdullah says:

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