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To: carranza2 who wrote (5097)5/30/2000 5:55:00 PM
From: Raymond  Read Replies (2) of 34857
 
carranza!
The answer to your question of GSM upgrade to UMTS.

The GSM system consists of a number of different nodes.
The base stations and the base station controllers(BSC:s) which handles the radio network.They will not be upgraded to UMTS.New nodes will be added for UMTS.WCDMA basestations and radio network controllers(RNC:s).A WCDMA basestation could be combined with a GSM basestation but with different radio boards.
The radio network is connected to the core network which consists of many different nodes.Examples are home location registers,mobile switching centers,GPRS nodes,Authentication centers...
This nodes will be common for UMTS and GSM.So big parts of the network will be possible to reuse for UMTS.Another thing is that the dual mode WCDMA,GSM mobile will have the same call control and mobility management for the 2 different modes.

Another thing often mentioned here is that WCDMA and IS-95 is so similar.They both use CDMA so some basic concepts are the same but I can assure you that layer1(CDMA layer) is very ,very different anyhow.So that another company has done an ASIC for CDMA says nothing about their capabilities
to do an ASIC for WCDMA.Especially since some leading people from that company says that their are no standard to make an ASIC after.I mean the standards are not that difficult to find.Just look into the 3GPP specifications.Of course it will come some change requests on the standard but that is always the case in this stage of the standardisation.
/R
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