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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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• IP-based QoS system for the air interface;
• based on the use of Flash OFDM technology;
• available in frequency bands from 450 MHz to 3.5 GHz; however, the only deployments to date have been at 850 and 1900 MHz plus a trial at 700 MHz;
• cellular-like handset terminal with full VoIP functionality announced.
IP wireless technology is one of the most successful of the proprietary BWA systems with features like:
• UMTS TDD standard (Release 99);
• moderate throughput rates - speeds can approach DSL performance;
• high-performance QoS scheme;
• compact base station systems;
• mature series of CPE devices;
• portable operation - handoff support is limited;
• scalable network architecture;
• plans to add HSDPA will increase capacity per cell by about 20%;
• variety of frequency bands in both TDD and FDD configurations between 1.9 and 3.5 GHz.
This technology, called ‘Ripwave’ System, has features like:
• high broadband data speeds - up to 6 Mbps (downlink) per user claimed;
• high capacity - each base station can deliver more than 12 Mbps;
• wide area coverage - high 163 dB link budget;
• low cost - claims up to 50 % lower than DSL or cable;
• simplicity - easy to deploy, easy to install, easy to use;
• low latency - 50-60 ms claimed;
• VoIP - demonstrated solution for broadband telephony;
• smart antenna system with phased antenna elements to improve coverage and signal quality;
• available in spectrum assignments between 2.3 and 3.5 GHz.
WiMAX is very much a global initiative. The original air interface standard (802.16) addressed applications in licensed bands (10-66 GHz). Subsequent amendments extended 802.16 to cover NLOS applications in licensed and unlicensed bands (sub-11 GHz). We now tend to categorize WiMAX applications into four versions or generations: fixed, nomadic, portable and mobile, the former being more complete IEEE standards than the latter.
When looking at WiMAX, it is important to view it as two distinct stages of evolution. The first stage will begin next year with products that cost and function much like current BWA equipment. The total fixed wireless market will not expand as a result of WiMAX; what we will see is a gradual migration of purchasing behaviour from proprietary equipment to WiMAX equipment. Operators will be wary of adopting WiMAX equipment until prices drop to the point where they cannot afford to ignore WiMAX, which should occur in late 2005.
At about the same time, we will see the beginning of the second stage of WiMAX: the birth of metro-area portability. Once 802.16e is approved, laptops and other mobile devices may be embedded with WiMAX chipsets, so that the users can have Internet access anywhere within WiMAX zones. If this sounds like 3G, in many ways it is. The second stage of WiMAX could be very disruptive to 3G operators and could drive a round of WiMAX network overlays in urban areas. Nevertheless, this will not happen until 2006 at the earliest. As shown in the following exhibit, WiMAX (stages one and two) and WiFi will complement one another.
In its future mobile version, a WiMAX-enabled device will maintain its data session by concurrently connecting to multiple WiMAX base stations, but if some infrastructures (or devices) are not standards-
compliant, there is the risk of dropping a user and corrupting their application data. With the WiMAX standards still evolving, with no certifications yet issued to give buyers confidence about standards-compliance, and with many unproven business models, some operators feel confused and hesitant about WiMAX roll-outs.
Consequently, the IEEE and ETSI have accelerated their standards-making in response to market demand. The nomadic standard (802.16d is now called 802.16-2004) was published in July 2004 to consolidate all amendments and base standards.
The mobile standard (802.16e) has reached a final draft, incorporating scalable signal modulation modes (SOFDMA) for the mobility standard. An ad hoc group has been tasked to enable roaming across networks, and ETSI HIPERMAN has been harmonized with 802.162004 OFDM.
WiMAX is emerging as a last-mile broadband wireless Internet access solution. WiMAX provides wireless services in the MAN just as Wi-Fi provides wireless services in LANs. WiMAX has the potential to make broadband service available in regions where it is currently not feasible, particularly in rural communities.
When certified products become available, the market will expand. Costs should be less than those for Wi-Fi because WiMAX is a standards-based technology. Spending on WiMAX infrastructure is expected to increase dramatically in the next few years, growing from $15 million in 2004 to $290 million by 2008, growing at a 109.7 % compound annual growth rate.
Infrastructure revenue includes CPE, point-to-point equipment used in backhauling LANs to the Internet and point-to-multipoint equipment used in broadband access. WiMAX is potentially disruptive in that it could compete with other high-speed fixed solutions, including DSL and cable modems, as well high-speed mobile solutions like 3G.
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