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The business of wimax - Pareek D.

Pareek D. The business of wimax - Wiley publishing , 2006. - 330 p.
ISBN-10 0-470-02691
Download (direct link): thebusinessof2006.pdf
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• OLDM and CDMA approaches carrier-class
• Proprietary antenna techniques
(beam forming, MIMO)
WiMAX is a wireless MAN technology that provides broadband wireless connectivity to fixed, portable and nomadic users. These powerful OFDM and NLOS technologies can potentially be used to provide backhaul to cellular networks, 802.11 hotspots and WLANs to the Internet, provide campus connectivity or significantly enhance the performance of public Wireless Fidelity (WiFi) hotspots by increasing the throughput in the backhaul network and by making it easier and more economical to deploy WiFi access points. WiMAX is also developing a ‘mobile’ standard which is not compatible with the fixed-based solution. The ‘mobile’ standard theoretically means that WiMAX can provide broadband wireless access in a vehicular environment. It provides up to 50 km of service area range, allows users to obtain broadband connectivity without needing direct line-of-sight with the base station, and provides total data rates of hundreds of Mbps per base station - a sufficient amount of bandwidth to simultaneously support hundreds of businesses with T1/E1-type connectivity and thousands of homes with DSL-type connectivity with a single base station. Further, WiMAX offers last-mile connection to remote unserved customers, as many are outside the range of DSL or broadband cable with WiMAX these barriers can be lifted and new customers can be captured.
WiMAX is faster to deploy, easier to scale and more flexible; thus, it gives an alternative service to customers who are not satisfied with their wired broadband. WiMAX is revolutionizing the broadband wireless world, enabling the formation of a global mass-market wireless industry (Figure 2.2).
Acceptance WiMAX certified eqi ipment
Early Early Late Laggards
Innovators adopters majority majority
1997-1999 2000-2005 2006-2007 2007-2009 2009
Figure 2.2 WiMAX chasm - acceptance
Historically, many operators worldwide have used broadband wireless technologies, namely point-to-point radios, as a proven, service provider-class method of connecting long-haul networks. While point-to-point technologies have also been used for access in isolated cases (with mixed results), point-to-multipoint technologies have long been recognized as the ‘holy grail’ for service providers because of their ability to provide broadband services over large geographic areas with greater flexibility and improved economies of scale. The industry has suffered from limited deployments, however, due to the high cost and low functionality of the early generation of broadband wireless systems.
In addition, a lack of healthy competition caused by various factors has contributed to the industry’s malaise. In addition, with frequency regulations varying from country to country, equipment manufacturers have used only proprietary air interface technologies. These and other factors have precluded the broadband wireless market from benefiting from the economies of scale that other technologies enjoy from open standards.
WiMAX addresses the deficiencies (as indicated below) of previous BWA initiatives:
• interoperability;
• cost of base stations and CPE;
• shared bandwidth up to 100 Mbps;
• line-of-sight not required;
• coverage 3-5 miles, more like cellular;
• licensed and unlicensed spectrum;
• many DOCSIS-like features including QoS;
• milestone to ‘broadband everywhere’.
What differentiates WiMAX from earlier BWA iterations is standardization. Chipsets are currently custom-built for each BWA vendor, adding time and cost to the process. Intel and other chipmakers would like to bring scale to the market and BWA vendors are always interested in less expensive chipsets. Similar to the way that the WiFi Alliance enforced standards compliance among vendor members, the WiMAX Forum plans to do the same among its members. Compliance results in interoperability, which in turn results in plug-and-play products. In the years ahead, WiMAX vendors will no longer have to provide end-to-end solutions; they can specialize in base stations or in wireless modems. Specialization will result in competitive pricing and value-added innovations.
WiMAX is the most important of the host of wireless standards emerging from IEEE. Its impact will owe much to WiFi, which has created interest in and market acceptance of wireless networking that will enable WiMAX to flourish in the mainstream, not least by attracting Intel into the sector. However, its effect on the world of business and consumer Internet and wireless access will be far more profound.
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