The *NEW* Frank Coluccio Technology Forum Message Board

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Technology Stocks : The *NEW* Frank Coluccio Technology Forum

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To: Frank A. Coluccio who wrote (20214)	3/14/2007 11:31:57 AM
From: Rob S.	Read Replies (1) of 46821

The 802.11n standard seems to be taking a long time to develop: pre-n ICs and devices have been on the market and suppliers are now delivering their 2nd to 4th generation.. the latest probably close and upgradeable to the final standard. Part of what has taken so long has been disagreements that started early. But what has delayed development has been the rapid pace of development of MIMO and related technologies. This is seen in the rate of patent grants and applications: MIMO and AAS patents have skyrocketed over the past three years. This reflects advances that unsettles firming up of the standards. The developments in the 'spatial domain' and in smart wireless broadband networking methods that includes MESH, tiered, intra-cell sub-networks, self-managed and cognitive radio methods, etc. take advantage of MIMO-AAS to help reduce interference while dramatically increasing bandwidth capacity. The pace of these developments as seen in the patents is aimed more at wide area cellular networks than directly at WiFi WLANs. The underlying modulation methods are also seeing development of new methods that aims to simplify and enhance operation. One of the problems of increased use of MIMO-AAS is that this adds complexity, particularly in mobile networks. Interference and hand-off between multiple cells and 'middle tier' networks becomes a major complexity. The pace of development has accelerated within 802.16: 802.16j, MMHR Mobile Multi-Hop Relay, and 802.16m WiMAX II, have pushed forward rapidly. And you can add 802.22 cognitive radio to this mix as well as it will be parlayed into WiMAX efforts. These efforts are headed to deliver 4G capabilities. LTE is on a similar path except that it is optimized more for mobility, using SC-OFDM for the up-link to help increase range and reduce mobile device power requirements. Both WiMAX and LTE are headed to deliver a broader range of capabilities than previous systems: they are using more adaptive modulation, and highly scalable designs that can be used for networking and wide area mobile deployments.

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