4G - Wireless Beyond Third Generation Message Board

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Technology Stocks : 4G - Wireless Beyond Third Generation

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To: slacker711 who wrote (789)	1/19/2007 6:20:18 PM
From: Rob S.	of 1002

"The coverage on 1x/EV-DO is going to be significantly better than for WiMAX for a very long-time. It takes years to get coverage up to speed on a new network and ..." 'Yes, but' Sprint is not deploying WiMAX as a stand alone network and service. Their approach is primarily multi-mode of WiMAX, WiFi and 1x EV-DO. Sprint continues to upgrade their EVDO network despite the heavy investment in WiMAX. Another area that many confuse the analysis of wireless evolution: all wireless systems will need high density deployments to support high bandwidth density, particularly that requiring more symmetrical bandwidth as does ptp file sharing, viral video, and IPTV sharing. The fastest growing area of Internet and entertainment industry is 'Personal Viral Video' and other forms of communications that take more symmetrical bandwidth. This prejudices systems designs to be optimized for data on both the up-link as well as the down-link. It also requires that the fan-out from the relatively limited spectrum bandwidth be reduced through the use of smaller cells and 'smart wireless network' topologies. A basic reason why WiFi is so powerful of a phenomena is that it covers a short range so that the same spectrum can be used hundreds of times within the foot print of a normal cell site. If all those devices could miraculously be made to extend for three miles they would cause so much interference the system would become dysfunctional. Although WiMAX may be used at distances up to several miles, the most common use will be at short range scaled to user demands. The same will be true for LTE which is in the process of being defined and slated for development over the next few years. All 4G systems will use OFDM combined with MIMO-AAS and modular smart wireless network topologies. The cost per bit has to do with the cost of end user devices but more so with the cost of building, maintaining, servicing, powering, and site costs of infrastructure including back haul for all this wonderful data. A primary objective of the smart wireless network deployments possible with WiMAX (or LTE whenever it comes about) will be reduction of site deployment and OPEX. That is achieved by scaled base stations and MMR base stations. That is: base stations that can be as small as a pack of playing cards for embedding into small fixtures and successively larger base stations with higher order management and routing functions and larger and more sophisticated antenna sub-systems, including higher order MIMO-AAS antennas. The 'public' wants competitive cost and simplicity: The appeal of WiMAX 4G is ability to pay for one service for multiple types of devices from basic Internet access to new types of sophisticated mobile entertainment and communications devices. The basic service should be very competitive (Sprint indicates $55 per month). And that basic service will be all many people will need. But then there will be the 'premium services' similar to those found with cable and telephone service offerings... only more diverse and many of them more effective and fun.

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