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To: Joe NYC who wrote (21173)	1/12/1999 11:37:00 AM
From: Ramus	Read Replies (2) \| Respond to of 152472

Joe, Basically, the GSM core network is the underlying infrastructure not including the air interface. It is my understanding that GSM networks and WCDMA networks will run on different frequency allocations. Particularly interesting to consider is that the NTT DoCoMo W-CDMA system will run in "green-field" or new virgin spectrum in Japan. I don't know if they even have plans to make available dual mode dual band handsets? Could be, but I just don't know. It's also interesting to consider that Japans Ministry which controls the spectrum to be made available to NTT DoCoMo has stated they will not allocate the spectrum unless the ITU designates standards. As you know, at the moment, the ITU is threatening to set aside CDMA based proposals because of the Ericsson/Qualcomm IPR disputes. Does this all tend to delay or stop NTT DoCoMo's plans on several fronts? GSM based CDMA is more marketing than substance. True many system operators will listen to the marketing of the vendors that they are most familiar with. But the fact is that to transition to 3G CDMA everyone is basically going to be doing a CDMA overlay. You can read in the W-CDMA proposals where they have a TDD mode that is used for doing handoffs with GSM and other TDMA based systems. This is detailed in the ETSI and ARIB versions. CDMA-2000 also has a TDD mode for the same purpose. The Vodafone tests showed that doing IS-95 overlays of GSM work very well and the same will be true of CDMA-2000. To contrast CDMA-2000 for IS-95 operators. I've read where, due to the spectral efficiency of IS-95 there is "space available" to implement high speed data services without impacting current network capacity in the same spectrum allocations. In other words, IS-95 operators will be able to move smoothly to new 3G services, in many cases, without new spectrum allocations. I suppose you could contact Sprint and other operators to get the lowdown on this. Hope this helps. Walt