WiMAX is one of the hottest broadband wireless technologies around today. It is based This is a brief tutorial that covers the fundamentals of WiMAX. Audience. coverage. For more detail on Wi-Fi, please look into our Wi-Fi Tutorial. WiMAX is one of the hottest broadband wireless technologies around today. WiMAX. Fundamentals of WiMAX is written in an easy-to-understand tutorial fashion. PDF (probability density function) of Nakagami fading is parameterized by m.
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This paper has been prepared on behalf of the WiMAX Forum and the broader range of WiMAX Forum members have had the opportunity to review and. Basic concept is same as Walkie talkies. • A Wi-Fi hotspot is created by installing an access point to an internet connection. • An access point. Tutorial Aims. By the end of this tutorial, you will know. • what a GENI WiMAX testbed offers to experimenters,. • how to design a non-trivial.
For received transmissions, the MAC layer does the reverse.
WiMAX Tutorial in PDF
The MAC incorporates several features suitable for a broad range of applications at different mobility rates, such as the following:. Strong QoS control is achieved by using a connection-oriented MAC architecture, where all downlink and uplink connections are controlled by the serving BS.
WiMAX also defines a concept of a service flow. A service flow is a unidirectional flow of packets with a particular set of QoS parameters and is identified by a service flow identifier SFID.
The user is allowed to take a fixed subscriber station and reconnect from a different point of attachment. Nomadic access is provided to a portable device, such as a PC card, with expectation of a best-effort handover. Simple mobility: The subscriber may move at speeds up to 60 kmph with brief interruptions less than 1 sec during handoff. Full mobility: It is likely that WiMAX networks will initially be deployed for fixed and nomadic applications and then evolve to support portability to full mobility over time.
In particular, the standard defines signaling mechanisms for tracking subscriber stations as they move from the coverage range of one base station to another when active or as they move from one paging group to another when idle.
The standard also has protocols to enable a seamless handover of ongoing connections from one base station to another. The architecture also supports IP-layer mobility using mobile IP. WiMAX systems were designed at the outset with robust security in mind. The standard includes state-of-the-art methods for ensuring user data privacy and preventing unauthorized access with additional protocol optimization for mobility.
The key aspects of WiMAX security are as follow:. Support for Privacy User data is encrypted using cryptographic schemes of proven robustness to provide privacy. The bit or bit key used for deriving the cipher is generated during the authentication phase and is periodically refreshed for additional protection. WiMAX terminal devices come with built-in X. Flexible Key-management Protocol The Privacy and Key Management Protocol Version 2 PKMv2 is used for securely transferring keying material from the base station to the mobile station, periodically reauthorizing and refreshing the keys.
A three-way handshake scheme is supported to optimize the re-authentication mechanisms for supporting fast handovers, while simultaneously preventing any man-inthe-middle attacks.
These standards are issued by IEEE The WiMAX umbrella currently includes Following is the chart of various IEEE A nonprofit organization called WiMAX Forum was formed in , with the aim of harmonizing standards, testing, and certifying interoperability between equipment from different manufacturers.
The WiMAXForum is working on setting up a baseline protocol that allows equipment and devices from multiple vendors to interoperate and also provides a choice of equipment and devices from different suppliers. We have covered just the very basics of WiMAX in this tutorial. There is plenty of good reference material available out there that you should refer to become a master of WiMAX. Here is a quick recapitulation of the points that we discussed in this tutorial:.
WiMAX is similar to the wireless standard known as Wi-Fi, but on a much larger scale and at faster speeds. The physical layer supports several advanced techniques for increasing the reliability of the link layer. WiMAX supports a number of advanced signal-processing techniques to improve overall system capacity.
These techniques include adaptive modulation and coding, spatial multiplexing, and multiuser diversity. Robust security functions, such as strong encryption and mutual authentication, are built into the WiMAX standard. WiMAX Forum is an industry-led, non-profit corporation formed to promote and certify compatibility and interoperability of broadband wireless products.
What is Next? IEEE So be ready for a new wireless revolutionary phase. You might be interested to know more about WiMAX. Send Thanks. Wimax Tutorial Uploaded by Anand Sq. Flag for inappropriate content. Related titles. Jump to Page. Search inside document.
Some of the inherent characteristics of wireless communications systems, which make it attractive for users, are given below: Wireless Network Topologies There are basically three ways to set up a wireless network: WiMAX Mesh or ad hoc Network This network is an independent local area network that is not connected to a wired infrastructure and in which all stations are connected directly to one another as shown in the following image. WiMAX 2. WiMAX is: Acronym for Worldwide Interoperability for Microwave Access.
Based on Wireless MAN technology. A wireless technology optimized for the delivery of IP centric services over a wide area.
MIMO-OFDM for LTE, WiFi and WiMAX: Coherent versus Non-coherent and Cooperative Turbo Transceivers
Why WiMax? WiMAX 3. Some of the more salient features that deserve highlighting are as follows: The overall network may be logically divided into three parts: Mobile Stations MS used by the end user to access the network. The design of WiMAX network is based on the following major principles: The WiMAX framework is based on several core principles: Support for different RAN topologies. The MAC incorporates several features suitable for a broad range of applications at different mobility rates, such as the following: Broadcast and multicast support.
Manageability primitives. High-speed handover and mobility management primitives. Three power management levels, normal operation, sleep, and idle. Header suppression, packing and fragmentation for an efficient use of spectrum. The key aspects of WiMAX security are as follow: Here is a quick recapitulation of the points that we discussed in this tutorial: Documents Similar To Wimax Tutorial.
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WiMAX Summary - WiMAX
Frequency bands - 2 to 11 GHz and 10 to 66 GHz licensed and unlicensed bands e. These technologies have already established a market presence, and have proven track record in meeting the demands of the residential and SOHO customers.
Typical application will be in remote areas where it is not economically feasible to have a DSL or Cable Internet.
WiMAX is also expected to be more reliable due to wireless nature of communication between the customer premises and the base station. This is particularly useful in developing countries where the reliability and quality of land-line communications infrastructure is often poor. Small and Medium Business: The WiMAX WBA is well suited to provide the reliability and speed for meeting the requirements of small and medium size businesses in low density environments.
One disadvantage of WiMAX is the spectral limitation, in other words limitation of wireless bandwidth. Management Skills. Communication Skills. Business Skills.
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Have you ever lie on your resume?WiMAX systems were designed at the outset with robust security in mind. SIP Interview Questions. Wireless technologies can be classified in different ways based on their range.
What are the salient features of WiMAX?
For the uplink, the base station can estimate the channel quality, based on the received signal quality. Tutorials Point Pvt. WBA is a point-to-multipoint system, which is made up of a base station and a subscriber equipment.
The evolution of wireless calls for greater gains from the synergistic combination of these technologies in the future.
The MAC incorporates several features suitable for a broad range of applications at different mobility rates, such as the following:. It is likely that WiMAX networks will initially be deployed for fixed and nomadic applications and then evolve to support portability to full mobility over time.