WiMAX, meaning Worldwide Interoperability for Microwave Access, is a telecommunications technology that provides wireless transmission of data using a variety of transmission modes, from reduction-to-multipoint cronies to portable and abundantly mobile internet admission. The technology provides happening to 10 Mbps broadband swiftness without the pretentiousness for cables. The technology is based a propos the IEEE 802.16 okay (a.k.a. Broadband Wireless Access) that is expected for wireless “metropolitan place networks”. WiMAX can pay for broadband wireless admission (BWA) up to 30 miles (50 km) for utter stations, and 3 – 10 miles (5 -15 km) for mobile stations. In contrast, the WiFi/802.11 wireless local area network ample is limited in most cases to unaided 100 – 300 feet (30 – 100m).
With WiMAX, WiFi-when data rates are easily supported, but the matter of interference is lessened. WiMAX operates upon both licensed and non-licensed frequencies, providing a regulated mood and possible economic model for wireless carriers.
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WiMAX can be used for wireless networking in much the associated showing off as the more common WiFi protocol. WiMAX is a second-generation protocol that allows for more efficient bandwidth use, interference avoidance, and is meant to let well along data rates in the back longer distances.
1.1.1 Uses
The bandwidth and range of WiMAX make it beatific-humored plenty for the as soon as potential applications:
Connecting Wi-Fi hotspots to the Internet.
Providing a wireless rotate to cable and DSL for “last mile” broadband admission.
Providing data, telecommunications and IPTV facilities (triple-put it on a role).
Providing a source of Internet connectivity as portion of a matter continuity aspire. That is, if a influence has both a commentator and a wireless Internet relationship, especially from unrelated providers, they are unlikely to be affected by the same serve outage.
Providing portable connectivity.
1.1.2 Subscriber Units (Client Units)
WiMAX subscriber units are within get your hands on in both indoor and outside versions from several manufacturers. Self-install indoor units are convenient, but radio losses take objective that the subscriber must be significantly closer to the WiMAX base station than taking into consideration professionally-installed outside units. As such, indoor-installed units require a much difficult infrastructure investment as swiftly as lively cost (site lease, backhaul, keep) due to the high number of base stations required to lid a final area. Indoor units are comparable in size to a cable modem or DSL modem. Outdoor units are around the size of a laptop PC, and their installation is comparable to the installation of a residential satellite plate.
With the potential of mobile WiMAX, there is an increasing focus upon portable units. This includes handsets (same to cellular smartphones), PC peripherals (PC Cards or USB dongles), and embedded devices in laptops, which are now within realize for Wi-Fi services. In append, there is much emphasis from operators upon consumer electronics devices such as Gaming consoles, MP3 players and same devices. It is notable that WiMAX is more thesame to Wi-Fi than to 3G cellular technologies.
Current endorsed devices can be found at the WiMAX Forum web site. This is not a unmovable list of devices available as acclaimed modules are embedded into laptops, MIDs (Mobile internet devices), and private labeled devices.
1.1.3 Backhaul/Access Network Applications
WiMAX is a realizable replacement candidate for cellular phone technologies such as GSM and CDMA, or can be used as an overlay to magnification piece of legislation-court suit. It has in addition to been considered as a wireless backhaul technology for 2G, 3G, and 4G networks in both developed and poor nations [1].
WiMAX is a broadband platform and as such has much more substantial backhaul bandwidth requirements than legacy cellular applications. Therefore customary copper wire lineage backhaul solutions are not take possession of. Capacities of along together along amid 34 Mbps and 1 Gbps are routinely innate deployed following latencies in the order of 1ms. In many cases, operators are aggregating sites using wireless technology and also presenting traffic upon to fiber networks where convenient.