Introduction wifi connects computers to each other, to the internet and to the wired network. Wifi is primarily a local area networking lan technology designed to provide inbuilding broadband coverage. A hotspot is any location where wifi network access is made publicly available. Topology of a wireless network pointtopoint usually very high speed and high capacity requires a clear line of sight to tower backbone, or backhaul connectivity corporatebusiness class service 2 3. Proven best telecom 5g, 4g, 3g, 2g training courses. Plus wimax has terminals that possess builtin digital certificates with. The wifi architecture consists of a base station that. In this paper, wimax means the scalable ofdma air interface as defined in ieee 802. Wireless tutorial wifi, 4g, 3g, white spaces and beyond.
Mobile wimax and wifi pdf, epub, docx and torrent then this site is not for you. Phil lomboy wimax wimax is short for worldwide interoperability for microwave access, and it also goes by the ieee name 802. A wimax tower station can connect directly to the internet using a. Phy layer broadband wireless channel ofdm technology ofdma duplexing scheme multipleantenna techniques wimax. Wireless networking technologies school of information. The letters of wimax stand for worldwide interoperability for microwave access axess, and it is a technology for point to multipoint wireless networking. Other technologies such as wimax, nstreme, and airmax use time division multiple access tdma instead. Introduction to broadband wireless overview of wimax and application wimax. Mobile wimax can be used in both fixed and mobile scenarios while fixed wimax does not support mobility features. This paper will introduce these two technologies and make comparisons between wimax and wifi. Wimax worldwide interoperability for microwave access is a family of wireless broadband communication standards based on the ieee 802.
Wimax base station is similar to accessing a wireless access point in a wifi network, but the coverage is greater. Wifi is the name given by the wifi alliance to the ieee 802. Wifi is a popular technology which allows any electronic device to exchange and transfer data. Opportunities and challenges in a wireless world 2. We show that mobile wimax can provide tens of megabits per second. A single wimax tower can provide coverage to a very large area as big as 3,000 square miles 8,000 square km. Wimax was officially recognized as 3g technology in 2007 6 many years after the recognition of the initial 3g technologies in 2000. Analysis of wifi and wimax and wireless network coexistence.
However, in developing countries, wimax may become the only wireless technology because wifi and cellular have not penetrated areas that can be reached with wimax technology. Mar 07, 2016 wimax receiver a wimax receiver may have a separate antenna or could be a standalone box or a pcmcia card sitting in your laptop or computer or any other device. In this paper the wifi and wimax technologies are introduced initially, and then their own. Wimax is quite latest technology and it can do far more than just developing wireless networks for high speed internet. Worldwide interoperability for microwave access brand licensed by the wimax forum. Wifi and wimax are two broadband technologies but these technologies.
There is the nonlineofsight, wifi sort of service, where a small antenna on your computer connects to the tower. Wimax, like wifi is the wireless last mile broadband access. This tutorial gives you a basic understanding on wifi. Plus wimax has terminals that possess builtin digital certificates with public and private keys and mac addresses. Wifi is used for developing wireless lan to access high speed internet or access just a network for file sharing and software services.
One wimax base station can be accessed by more than 60 users. Ultimate destination router ap router 2 1 3 management frames in addition to the data frames containing the user data to be transported over the 802. Pdf analysis of wifi and wimax and wireless network. Infrastructure bss independent bss adhoc network ap wired lan infrastructure bss this is by far the most common way of implementing wlans. In this mode, wimax uses a lower frequency range 2 ghz to 11 ghz similar to wifi. Iberry wifi provides solutions for the wifi hotel hotspots, wifi.
Topology of a wireless network pointtopoint usually very high speed and high capacity requires a clear line of sight to tower backbone, or backhaul connectivity corporatebusiness class service 2. Wireless adapter of a pc translates data to radio signal and transmits it using antenna. Ppt wifi technology powerpoint presentation free to. In terms of the osi reference model, the radio signal operates at the physical layer, and the data format controls several of the higher layers. Wimax is similar to the wireless standard known as wifi, but on a much larger scale and at faster speeds. Some of the salient features supported by wimax are. What is wifi technology wifi technology wifi notes. Wifi overview basic elements standards and variants wimax overview basic elements wireless lans wifi 802. Wimax is designed for long distance coverage and it covers distance in kilometers, it uses licensed spectrum and unlicensed also in some case. Wifi is a local area wireless technology which helps an electronic device to transfer data and connect internet using the radio waves. As the name indicates, wifi provides wireless access to applications and data across using radio waves. In addition, wireless network coexistence of wlan and wimax will be. Initially hailed as an economical way to provide last, applications, such as wimax.
Pdf analysis of wifi and wimax and wireless network coexistence. Wireless fidelity popularly known as wifi, developed on ieee 802. The network structure includes the wireless network interface adapters and base stations that send and receive the radio signals. As the name indicates, wifi provides wireless access to applications and data across using radio wav. Although the term wimax is only a few years old, 802. Fixed wimax is a pointtomultipoint technology, whereas mobile wimax is a multipointtomultipoint technology, similar to that of a cellular infrastructure. Wireless router and wireless adapter help wifi operation.
Pdf on nov 1, 2010, utsho a arefin and others published. However since most of our wlans are based on those standards, the term wifi is used generally as a synonym for wlan. Mac layer wimax equipment trial results future of wimax 4 technology digital subscriber line dsl broadband over telephone wires cable modem broadband. They sit in a window, or they have an external roofmounted antenna that substantially increases the range. A nomadic version would keep wimaxenabled devices connected over large areas, much like todays cell phones. They convert the wimax signal to wifi, providing connectivity to wifi devices inside the home. Introduction to wireless networks when you invent a new network. Wifi cards they accept the wireless signal and relay information. Elements of wifi network access point ap the ap is a wireless lan transceiver or base stationthat can connect one or many wireless devices simultaneously to the internet. The overviews do show that wimax exhibits strong advantages over the current and popular wifi. It is a completely different technology that uses a variety of licensed and unlicensed frequencies. The wifi technology wifi uses radio technology to transmit and receive data at high speed.
Wimax could potentially erase the suburban and rural blackout areas that currently have no broadband internet access because phone and. Mar 26, 2015 lets read further on wimax vs wifi wifi. Before you start proceeding with this tutorial, we are making an assumption that you are. Short notes on wimax technology, short comparison with lte, its advantages disadvantages, its use. Wimax delivers pointtopoint connection to the internet from service provide to as user. Note that these management frames compete for access. Wimax devices for the last mile will not be available until 2005. A wimax receiver the receiver and antenna could be a small box or pcmcia card, or they could be built into a laptop the way wifi access is today. Although most people are familiar with the basic way that a home wifi network might work, it is not the only format for a wifi network. Get wireless telecom training through worlds finest expert hd videos by telcoma. The predecessor of wimax wifi wireless fidelity is a set of technologies that are based on the ieee 802. Wimax receiver a wimax receiver may have a separate antenna or could be a standalone box or a pcmcia card sitting in your laptop or computer or any other device. An interesting usage of computer networks is in offices and educational institutions, where tens sometimes hundreds of personal computers pcs are.
Technologies that started from humble origins, such as ofdm used in. A technical overview and performance evaluation executive summary in this document we provide an overview of mobile wimax and provide the performance for the basic minimal configuration based on the wimax forum release1 system profiles. There is an emphasis on security issues and the available security protocols. Mar 25, 2015 wireless fidelity popularly known as wifi, developed on ieee 802. Wimax versus wifi radio technology besides the obvious difference in transmission range, there are a number of improvements in the radio link technology that distinguish wimax from wifi. It is widely used technology advancement in wireless communication for over decay now. The node may only transmit when the channel becomes idle. The wide range of the wimax technology depends on the height of the antennas, if they are installed at the suitable position from where there is no barrier between the transmitter and receiver, and then we can get better range and service from it. Cse4255 lecture 4 wireless technologies 1 objectives.
This is also referred as customer premise equipment cpe. Even though the frequency for operation of wimax is not definite, the most likely band. Introduction wimax worldwide interoperability for microwave access is the trade name for a group of wireless technologies that emerged from the ieee 802. Targeted at the mobile and handheld market, they cover the 2. Wimax system performance simulations are based on itu models channel model path 1 path 2 path 3 path 4 path 5 path 6 itu pedestrian b l ti fi 0 db 00. We can compare it with wifi based on the following factors. Technologies such as 3g, wifi, wimax, and uwb work together to meet the. Wimax is one of the hottest broadband wireless technologies around today. Wimax is an ip based, wireless broadband access technology that provides performance similar to 802. This new technology of fers a great deal of potential. Antonello notes that the wimax radio link incorporates features to take advantage of. Wifi is considered to be one of the first widely deployed fixed broadband wireless networks.
In addition, wireless network coexistence of wlan and wimax will be explored through simulation. A nomadic version would keep wimax enabled devices connected over large areas, much like todays cell phones. The current mobile wimax systems are based on so called release 1. Wimax technology is a wireless broadband communications technology based around the iee 802. You can therefore use wimax technology to extend the power and range of wifi and cellular networks. Before a node may transmit, it must first listen for transmissions from other radios. Wimax may become the only wireless technology because wifi and cellular have. Wimax wimax would operate similar to wifi but at higher speeds, over greater distances and for a greater number of users. Wimax aims to provide a metropolitan access network which will provide higher bandwidth and larger coverage than are currently available with existing wireless technologies such as wifi and 3g. Like having robust security protocols, including the advanced encryption standard aka rijndael and 3des. Essentially there are two basic types of wifi network.
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