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Technology Stocks : Interdigital Communication(IDCC) -- Ignore unavailable to you. Want to Upgrade?

To: w molloy who wrote (4456)	7/17/2000 7:57:15 PM
From: mightylakers	Read Replies (1) \| Respond to of 5195

What do you think of RFMD? I don't see the name in your list.

To: w molloy who wrote (4456)	7/17/2000 8:03:23 PM
From: Gus	Read Replies (1) \| Respond to of 5195

Probably your best post, Molloy. Some additions: 1) LSI's position in storage networking is much more impressive than its position in wireless. 2) ADI and INTC are collaborating on the Othello platform to go after TXN's DSP franchise. ADI, INTC and Mitsubishi also have other wireless-related projects underway. If you're up to some detective work, follow I.Q.'s work on the IDC club regarding the possible use of IDCC's seamless handover technology over QCOM's soft handover technology based on the working documents at the 3GPP. genesis, re: handover. I have now read through the 25.304 spec being "tweaked" by 3GPP (updates to Release 99). I have also reviewed IDCC patent number 5,960,347, Seamless Handoff System and Method, which you refer to in your post. The conclusion I have reached is that the current Cell Reselection procedures in 25.304 represent an improved version of the Seamless Handoff System and Method that IDCC patented. Perhaps IDCC has additional pending patent applications that include claims on the cell reselection methods (algorithms) currently in the 25.304 spec. The key differences to look for between soft handoff (prior art) and seamless handoff (as described in the IDCC patent) are 1) measurement of global pilot channel power by handset (UE), as opposed to measurements of traffic channels from multiple base stations (this is part of 25.304), 2) maintenance of a SINGLE traffic channel connection to a single base station while travelling near a cell boundary (this is part of 25.304), 3) decision to switch is made by the UE, not by a central switching center (this is part of 25.304). Based on this alone it is clear that for WCDMA, some elements of IDCC's aforementioned patent have been used. However, the technique described in the IDCC patent of ramping UE transmit power and waiting for a response from a candidate base station is not used in 25.304. Instead, receive signal level measurements are made by the UE on the global pilot channel to determine the best cell, eliminating any participation by the base station in the process. This could be an enhancement to IDCC's patent. It makes a lot of sense to eliminate the transmit power ramping process if pilot channels are constantly available for measurement. Anyway, some of IDCC's claims are, IMO, definitely represented in the current specs. What do you think? As for Immediate Cell Evaluation versus Cell Reselection, it appears that Immediate Cell Evaluation compares candidate base stations at the current frequency only, allowing a quick comparison with minimal measurements. If required, a more complex Cell Reselection procedure is initiated, which could lead to selection of a cell at a different frequency or could lead to selection of a cell supporting a different radio access technology (GSM versus WCDMA, for example). This Cell Reselection procedure appears to be particularly important for fast moving UE's. ragingbull.altavista.com