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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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The end goal is to show service providers and end-users that, as WiMAX Forum Certified hardware becomes available, service providers will have the option of mixing and matching different BSs and SSs from different vendors in their deployed networks.
Upon successful completion of the described process flow, the WiMAX Forum will then grant and publish a vendor’s product as WiMAX Forum Certified. It should be pointed out that each BS/SS must also pass regulatory testing, which is an independent parallel process to the WiMAX certification process (Figure A1.2).
ABSTRACT TEST SUITE PROCESS
The WiMAX Forum is working on the development of numerous process and procedural test documents under the umbrella of the
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WiMAX CERTIFICATION PROCESS
IEEE 802.16 standard. The key WiMAX test documents are as follows:
• PICS in a table format;
• test purposes and test suite structure (TP and TSS);
• radio conformance test specification (RCT);
• protocol implementation extra information for testing (IXIT) in a table format.
These test documents are used in the development of a standardized abstract test suite (ATS). The ATS is the culmination of test scripts written in a tree and tabular combined notation (TTCN) language. The end products of the ATS are test scripts for conformance and interoperability testing under a number of test conditions called for in the PICS document for a specified WiMAX system profile. Test scripts automate the process of WiMAX certification testing.
A2
WiBro
One development worth mentioning here is WiBro (wireless broadband). WiBro is a South Korean initiative and an opportunity for the country to establish a ‘homegrown’ wireless technology, much similar to what the Chinese are doing with TD-SCDMA (Figure A2.1).
WiBro will now probably be included within the .16e umbrella, thus making it another potential WiMAX profile. Specifically, WiBro is a
Mobility
Figure A2.1 WiBro speed vs mobility
The Business of WiMAX Deepak Pareek
© 2006 John Wiley & Sons, Ltd
286
WiBRO
Figure A2.2 WiBro spectrum
with peak user data rates of 3 Mbps in the downlink (uplink = 1 Mbps) and 18 Mbps of peak sector throughput in the downlink (uplink = 6 Mbps). Average user data rates are advertised as being in excess of 512 kbps, and with the cell radius limited to 1 km, it will largely be deployed in densely populated areas (Figure A2.3).
Initially, WiBro was perceived as being a portable solution, even though it could support mobile users, since the technology did not support seamless cell handoffs. With its potential future adoption into the WiMAX family of profiles, there could be a desire to introduce vehicular mobility or near-seamless handoffs.
Figure A2.3 WiBro functional model
WiBRO
287
Mobility Service charge
Figure A2.4 WiBro value analysis
It is not entirely clear how WiMAX/WiBro will evolve, but it is foreseeable that the technology will first try to incorporate limited portable features, and then, based on customer demand, technology advancements and the underlying economics of an inherently more expensive solution, it will move towards more ‘seamless mobility’ (Figure A2.4).
Korea Telecom, in conjunction with Samsung, is promising commercial WiBro services by April 2006, while the Nortel and LG WiBro joint-venture, which was announced in March 2005, is currently suggesting customer trials in the second half of 2006. Given the lag between infrastructure and CPEs, the ‘commercial’ service will probably lack commercially viable CPEs until at least late 2006.
A3
Proprietary BWA Systems
Early commercial development of BWA was led by four major vendors
Arraycomm;
Flarion;
IP Wireless;
• Navini.
Each has developed their own unique approach to achieving high speed broadband, leading to tradeoffs in operating spectrum requirements, coverage and cost.
ARRAYCOM
iBurst technology from Arraycom has features like:
• high broadband data speeds - up to 1.0 Mbps (downlink) per user;
• wide area coverage - its range is one of the best in the industry;
• always-on connectivity - the network supports full handoff;
• low cost - it claims to have a market-leading cost structure;
• simplicity - easy to deploy, easy to install, easy to use;
• commercialization - operationally proven and scalable;
• capacity - each base station sector can deliver more than 30 Mbps;
• use of TDD to permit downlink and uplink paths to share common spectrum;
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PROPRIETARY BWA SYSTEMS
FLARION
Flarion’s technology has been tested at various locations and it has features like:
• high throughput - up to 1.5 Mbps (downlink) per user (Flexband claims 2.5 Mbps sustainable sector throughput with up to 800 kbps at cell edge);
• spectral efficiency (1.25 or 5 MHz multi-carrier);
• full mobility with handoff;
• low latency - less than 50 ms claimed;
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