Qualcomm Moderated Thread - please read rules before posting Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Qualcomm Moderated Thread - please read rules before posting

QCOM 174.01

-0.3%

3:59 PM EST

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: engineer who wrote (20006)	3/6/2002 5:52:42 PM
From: John Biddle	Read Replies (4) of 196646

Let me see if I understand this GSM1x overlay and how it works. I'll lay out what I think I understand, and you correct my mistakes, if you wouldn't mind <g>. Assume the overlay is taking place in Europe where no other carrier uses CDMA of any kind. TIA 1. GSM1X is an overlay which REPLACES GSM in the air interface or Radio Access Network (RAN) 2. GSM1X continues to use the heritage GSM land line infrastructure, AKA the GSM MAP core network 3. Users with a CDMA only phone would only be able to talk in those locations served by a GSM1X base station (since there are no other CDMA base stations anywhere in Europe). This phone would have to support and have in it a SIM/RUIM so that it would work properly with the GSM MAP core network. 4. GSM operators in Europe all support roaming between each other, so if a GSM user couldn't connect to a GSM base station of his carrier, he'd roam to one of another carrier, presuming there was one to roam to. 5. Users with a GSM phone would be able to make calls anywhere there was a GSM base station around, presumably everywhere since Europe has overlapping carriers with GSM roaming. 6. Users who made a GSM call would use heritage GSM infrastructure for the call. That is, the call would not go through the Qualcomm GSM1x basestation, it would go through one of the many existing GSM only base stations. 7. A caller with a multi-mode GSM/CDMA1X phone, with a SIM/RUIM, would be able to make a call anywhere in Europe where there was EITHER a GSM only base station or a GSM1x base station since his phone can talk to either. 8. This multi-mode phone is not a GSM1X phone, since it works as a GSM phone or as a CDMA1X phone, only the base station is doing anything that earns a GSM1X name. 9. This multi-mode phone GSM/CDMA1X can roam back and forth between GSM base stations and GSM1X base stations, and as it does, it switches back and forth between using the GSM air interface and the CDMA1X air interface respectively. The entire call is handled over the heritage GSM MAP core network. 10. A carrier who did this would presumably push its subscribers to switch to multi-mode GSM/CDMA so as to avoid a huge roaming payment to all of its competitors. How'd I do? John

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next