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Dear students,

A Graded Discussion Board for 'Data Communications (CS601)' will be opened on Tuesday 12 August, 2014 and it will be closed on Wednesday 13 August, 2014.

Discussion Topic

A well reputed organization wants to implement a communication network among its head office and three branches in a city. The communication technology should be able to serve with good quality of service (QoS) and reliability. The organization has to choose either Wi-Fi or WiMAX. In your opinion, which of the given technique is more suitable for such scenario? Give two proper reasons to support your answer in either case.

Read the following instructions carefully before sending your comments:

  1. GDB will have weight-age of 5% of your total subject marks.
  2. Your discussion must be based on logical facts.
  3. You should post your comments on the Graded Discussion Board & not on the Regular MDB. Both will run parallel to each other during the time specified above.
  4. Your comments should be relevant to the topic i.e. clear and concise (Maximum 5-7 lines answer).
  5. Books, websites and other reading material may be consulted before posting your comments. (Do not copy the material as it is.)
  6. No extra time will be given for discussion.
  7. You cannot participate in the discussion after the due date or through e-mail.

Views: 3599

Replies to This Discussion

Need to provide answer for both cases.

as in GDB "Give two proper reasons to support your answer in either case"

no need to provide answers for both cases.. i asked... just provide reason for your selected technology...

Thank you, can you provide the reply given by them.  Because if thats the case then for sure its Wimax only 

Wi-Max is better choice

1) Data transmission rate in Wi-Fi is 54Mbps while in Wi-Max its 10-100Mbps

2) Wi-Fi rage is upto 100 meters while WI-Max range is upto 40KM

3) QoS is not available in Wi-Fi while it's available in Wi-Max

4) Wi-Fi users may be hundreds and Wi-Max users are thousands...


what Is the Difference between Wifi and Wimax?
The difference between Wimax and Wi-Fi is; Wimax is a criterion based wireless technology which is used to provide internet access and multimedia services at very high speed to the end user while Wi-Fi technology uses local area network (LAN) for internet access. They are both wireless technologies but designed for completely different applications. Wimax covers a greater distance than Wi-Fi thus can cover a metropolitan area network.

WiMax and Wi-Fi are both contemporary technologies for connecting to the Internet, the design and technology of the two systems differ substantially. WiMax networks broadcast their signals for miles from outdoor towers, and rely on an infrastructure of computers to authenticate subscribers and connect them to the Internet. Wi-Fi networks, by contrast, are based on small, plug-in routers that provide internet connectivity to people within a single building or small area over a short range

[Image: ftjzpy.jpg]

WiMax has range to several kilometers while WiFi is limited to Max 500 yards.

WIMax has minimum security, data loss and band width issues.

provies VoIP services and supports WAN communication as required in GDB.

thanx to all 

WiMAX is similar to the wireless standard known as Wi-Fi, but on a much larger scale and at faster speeds. A nomadic version would keep WiMAX-enabled devices connected over large areas. Wi-Fi is based on IEEE 802.11 standard where as WiMAX is based on IEEE 802.16. However, both are IEEE standards.

Wi-Fi typically provides local network access for around a few hundred feet with speeds of up to 54 Mbps, a single WiMAX antenna is expected to have a range of up to 40 miles with speeds of 70 Mbps or more. As such, WiMAX can bring the underlying Internet connection needed to service localWi-Fi networks.

Wi-Fi is intended for LAN applications, users scale from one to tens with one subscriber for each CPE device. Fixed channel sizes (20MHz).
WiMAX is designed to efficiently support from one to hundreds of Consumer premises equipments (CPE)s, with unlimited subscribers behind each CPE. Flexible channel sizes from 1.5MHz to 20MHz.

Bit rate:
Wi-Fi works at 2.7 bps/Hz and can peak up to 54 Mbps in 20 MHz channel.
WiMAX works at 5 bps/Hz and can peak up to 100 Mbps in a 20 MHz channel.

Quality of Service:
Wi-Fi does not guarantee any QoS but WiMax will provide your several level of QoS. As such, WiMAX can bring the underlying Internet connection needed to service local Wi-Fi networks. Wi-Fi does not provide ubiquitous broadband while WiMAX does.

Two Type of Services:
WiMAX can provide two forms of wireless service:
Non-line-of-sight: service is a WiFi sort of service. Here a small antenna on your computer connects to
the WiMAX tower. In this mode, WiMAX uses a lower frequency range -- 2 GHz to 11 GHz (similar to WiFi).

Line-of-sight: service, where a fixed dish antenna points straight at the WiMAX tower from a rooftop or pole. The line-of-sight connection is stronger and more stable, so it's able to send a lot of data with fewer errors. Line-of-sight transmissions use higher frequencies, with ranges reaching a possible 66 GHz.

Very high peak data rates:
WiMAX is capable of supporting very high peak data rates. In fact, the peak PHY data rate can be as high as 74Mbps when operating using a 20MHz wide spectrum.
More typically, using a 10MHz spectrum operating using TDD scheme with a 3:1 downlink-to-uplink ratio, the peak PHY data rate is about 25Mbps and 6.7Mbps for the downlink and the uplink, respectively.

WiMAX Receiver:
A WiMAX receiver may have a separate antenna or could be a stand-alone box or a PCMCIA card sitting in your laptop or computer or any other device. This is also referred as customer premise equipment (CPE).WiMAX base station is similar to accessing a wireless access point in a WiFi network, but the coverage is greater.

Thanks to sharing data

its wiMax

wimax is best since it is used for world wise!

what do u think guys??

You Right sir g  

WImax is best 


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