WIMAX TUTORIAL PDF
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.
|Language:||English, Spanish, Portuguese|
|ePub File Size:||24.76 MB|
|PDF File Size:||15.64 MB|
|Distribution:||Free* [*Regsitration Required]|
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.
WiMAX Summary - WiMAX
It can also be more bandwidth efficient. The scheduling algorithm also allows the base station to control QoS parameters by balancing the time-slot assignments among the application needs of the subscriber stations.
This brings potential benefits in terms of coverage, self installation, power consumption, frequency re-use and bandwidth efficiency. The WiMAX certification allows vendors with Most interest will probably be in the Already today, a number of networks throughout the World are in commercial operation using certified WiMAX equipment compliant with the The WiMAX specification improves upon many of the limitations of the Wi-Fi standard by providing increased bandwidth and range and stronger encryption.
It provides connectivity between network endpoints without need for direct line of sight in favourable circumstances. The non-line-of-sight propagation NLOS performance requires the. It relies upon multi-path signals, somewhat in the manner of Each of these are true individually, given ideal circumstances, but they are not simultaneously true.
The other feature to consider with WiMAX is that available bandwidth is shared between users in a given radio sector, so if there are many active users in a single sector, each will get reduced bandwidth.
Broadband Access Many cable, wireless, and traditional telephone companies are closely examining it, in active trials or small scale deployments, for "last mile" connectivity at high data rates. This could result in lower pricing for both home and business customers as competition lowers prices.
In areas without pre-existing physical cable or telephone networks, WiMAX will, it appears, be a viable alternative for broadband access that has been economically unavailable. Prior to WiMax, many operators have been using proprietary fixed wireless technologies for broadband services.
WiMAX subscriber units are available in both indoor and outdoor versions from several manufacturers. Self install indoor units are convenient, but the subscriber must be significantly closer to the WiMax base station than with professionally installed units. As such, indoor installed units require a much higher infrastructure investment as well as operational cost site lease, backhaul, maintenance due to the high number of base stations required to cover a given area.
Indoor units are comparable in size to a cable modem or DSL modem. Outdoor units allow for the subscriber to be much further away from the WiMax base station, but usually require professional installation. Outdoor units are roughly the size of a textbook, and their installation is comparable to a residential satellite dish. WiMAX antenna equipment can "share" a cell tower without compromising the function of cellular arrays already installed.
Mobile WiMAX network equipment and terminals is expected to become available in the next few years. In line with these possible applications is the technology's ability to serve as a high bandwidth "backhaul" for Internet or cellular phone traffic from remote areas back to an internet backbone. Given the limited wired infrastructure in some developing countries, the costs to install a WiMAX station in conjunction with an existing cellular tower or even as a solitary hub are likely to be small in comparison to developing a wired solution.
Areas of low population density and flat terrain are particularily suited to WiMAX and its range. For countries that have skipped wired infrastructure as a result of inhibitive costs and unsympathetic geography, WiMAX can enhance wireless infrastructure in an inexpensive, decentralized, deployment-friendly and effective manner. However, specification is not the same as permission to use.
There is no uniform global licensed spectrum for WiMAX.
In the US, the biggest segment available is around 2. Elsewhere in the world, the most likely bands used will be around 3. In addition, several companies have announced plans to utilize the WiMAX standard in the 1. There is some prospect in the U. In any case, there will be other uses suggested for that spectrum if and when it actually becomes open.
It seems likely that there will be several variants of The actual radio bandwidth of spectrum allocations is also likely to vary. Typical allocations are likely to provide channels of 5 MHz or 7 MHz. In principle the larger the bandwidth allocation of the spectrum, the higher the bandwidth that WiMAX can support for user traffic.
What are the salient features of WiMAX?
Standards The current IEEE Std On the other hand, Fixed WiMAX is a popular standard among alternative service providers and operators in developing areas due to its low cost of deployment and advanced performance in a fixed environment. However, some manufacturers are planning to provide a migration path for older equipment to SOFDMA compatibility which would ease the transition for those networks which have already made the OFDMA investment.
The equivalent of The Koreans sought to develop WiBro as a regional and potentially international alternative to 3. WiBro will go up against 3G and very high bandwidth wire-line services rather than as gap-filler or rural under-served market deployments as is often exampled as the 'best fit' markets for WiMAX.
WiSOA are dedicated to educating and informing its members, industry representatives and government regulators of the importance of WiMAX spectrum, its use, and the potential for WiMAX to revolutionise broadband.
Competing technologies WiMAX is a framework for wireless development based on a forward-looking core set of technologies. More recently 3GPP cellular's 4G, UMTS also provides a circuit channel optimized for voice and video traffic. On the other side of the world, frequency bidding in Malaysia was stopped and any allocation of WiMAX has been suspended indefinitely in September A number of ISPs around the world have deployed the system already.
UMTS-TDD uses a Time Division Duplexed air interface so both the downlink and uplink can share the same frequency, making it more dynamic in terms of being able to allocate spectrum as traffic patterns change compared to traditional UMTS.
Both WiMAX and LTE use a different core technology than 3G and prior cellular systems and neither can provide shared use of current cellular spectrums. The evolution of wireless calls for greater gains from the synergistic combination of these technologies in the future. However, WiMAX advocates perceive evolution of WBB as also shifting the 'architectural evolution' of wireless networks to more symmetrical, higher bandwidth in which multi-mode CDMA and other technologies can fulfill long range and low bandwidth persistent requirements.
Evolution-Data Optimized is a wireless radio broadband data standard adopted by many CDMA mobile phone service providers around the globe. Wi-Fi is a cheap and easy way of providing local connectivity at high speed.
WiMAX uses licenced spectrum and has strong authentication mechanisms built in. It has considerably greater range than Wi-Fi. It is a future technology for true wireless broadband or 4G. This followed questions of whether panel participants had disclosed their affiliations in a proper manner. Deployment The following are current and planned deployments, the bands in which they operate and the standards they use.
Unwired holds licences in the 3. This will be a replacement to its proprietary fixed wireless system which currently exists on the 3. Austar holds licences in the 3. A few Brazilian companies already have rights to important parts of the WiMax spectrum, both at 2.
Rogers has provided its spectrum rights in the 2. Services are currently available from both companies in Canada.
MIMO-OFDM for LTE, WiFi and WiMAX: Coherent versus Non-coherent and Cooperative Turbo Transceivers
Despite of government reluctance to allow private companies to use the WiMAX frequency ranges, a few companies are using the WiMAX technologies with different frequencies. For private customers, the largest cities are covered by ClearWire, while Butler Networks delivers WiMAX access to bussiness customers through other telecommunication providers.
Irish Broadband Irish Broadband holds 3. Clearwire Broadband an American Company that also holds regional 3. Several base stations can be connected with one another by use of high-speed backhaul microwave links. This would allow for roaming by a WiMAX subscriber from one base station to another base station area, similar to roaming enabled by Cellular phone companies.
Range - mile km radius from base station b. Speed - Up to 70 megabits per second c. Non-Line-of-sight NLoS between user and base station d. 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.Jons Bond.
Pre There is no uniform global licensed spectrum for WiMAX. WiMAX system offers support for constant bit rate, variable bit rate, real-time, and nonreal-time traffic flows, in addition to best-effort data traffic. WiMAX technology is able to meet the needs of a large variety of users from those in developed nations wanting to install a new high speed data network very cheaply without the cost and time required to install a wired network, to those in rural areas needing fast access where wired solutions may not be viable because of the distances and costs involved - effectively providing WiMAX broadband.
Kinosraj Kumaran. Broadband Access Many cable, wireless, and traditional telephone companies are closely examining it, in active trials or small scale deployments, for "last mile" connectivity at high data rates. These technologies have already established a market presence, and have proven track record in meeting the demands of the residential and SOHO customers.